From libssh2-devel-bounces@cool.haxx.se Wed Feb 1 09:21:26 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q118L0OC026624; Wed, 1 Feb 2012 09:21:22 +0100 Received: from mail-bk0-f54.google.com (mail-bk0-f54.google.com [209.85.214.54]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q118KvW1026418 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Wed, 1 Feb 2012 09:20:58 +0100 Received: by bkbzx1 with SMTP id zx1so1023372bkb.41 for ; Wed, 01 Feb 2012 00:20:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=issart.com; s=issartcom; h=message-id:date:from:organization:user-agent:mime-version:to :subject:content-type:content-transfer-encoding; bh=2i9TPAj2+TdmSa3291gPFknwqK0YeqJ3aknZD/ob5Jo=; b=b/434so/rlGFLLR3bqyt0fOtRwNpCOGp2Qb51IMJei85EzAJxFFuupAmlVgtuPNG5F 4NjEiQWnrNOrMuKiFoRHVNprrqt6/2Tt/0ypT5ib09SoRNIODkk3P4YDnMIDRVGDC7LU uQOTHN/bD9HKXbEydFDHt+7pVKbAAPPU4FJog= Received: by 10.204.148.84 with SMTP id o20mr11871084bkv.103.1328084452194; Wed, 01 Feb 2012 00:20:52 -0800 (PST) Received: from [172.17.9.68] ([91.215.84.26]) by mx.google.com with ESMTPS id ek9sm52092742bkb.10.2012.02.01.00.20.50 (version=SSLv3 cipher=OTHER); Wed, 01 Feb 2012 00:20:51 -0800 (PST) Message-ID: <4F28F5E0.8050308@issart.com> Date: Wed, 01 Feb 2012 15:20:48 +0700 From: Denis Malyshkin Organization: ISS Art, Ltd. User-Agent: Thunderbird 2.0.0.14 (Windows/20080421) MIME-Version: 1.0 To: libssh2-devel@cool.haxx.se Subject: Several direct_tcpip channels in one SSH session X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Hi, Is it possible to do opening of several direct_tcpip channels in one SSH session simultaneously (in async mode)? I.e. to call libssh2_channel_direct_tcpip_ex(...) several times for one session without waiting while previous calls to it are completed. For example, is it possible to write something like the next (it is just an example, not a compilable code): list params; // List of parameters for creating channels while (!params.empty()) { for(list::iterator i = params.begin(); i != params.end(); ) { LIBSSH2_CHANNEL * channel = libssh2_channel_direct_tcpip_ex(session, i->host, i->port, ...); if (!channel) { if (last_error() != LIBSSH2_ERROR_EAGAIN) { // Error, respond to the caller, remove channel from the creation list. NotifyError(*i); i = params.erase(i); } else { ++i; } } else { // Channel created, respond to the caller, remove channel from the creation list. NotifyCreated(channel, *i); i = params.erase(i); } } } As I saw in the source code, channel_direct_tcpip(...) uses some variables in the 'session' structure (like session->direct_state, session->direct_message and so on). So it seems that only one channel creation call can be execute for a session at the moment. And the next channel can be created only then a creation of the previous one is finished (successfully or with error). Is it correct? Thanks. -- Best regards, Denis Malyshkin, Senior C++ Developer of ISS Art, Ltd., Omsk, Russia. Mobile Phone: +7 913 669 2896 Office tel/fax +7 3812 396959 Yahoo Messenger: dmalyshkin Web: http://www.issart.com E-mail: dmalyshkin@issart.com _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 1 09:40:16 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q118e807007244; Wed, 1 Feb 2012 09:40:15 +0100 Received: from mail-we0-f182.google.com (mail-we0-f182.google.com [74.125.82.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q118e6wU006468 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Wed, 1 Feb 2012 09:40:06 +0100 Received: by werm13 with SMTP id m13so999814wer.41 for ; Wed, 01 Feb 2012 00:40:03 -0800 (PST) Received: by 10.216.139.223 with SMTP id c73mr2459138wej.1.1328085603911; Wed, 01 Feb 2012 00:40:03 -0800 (PST) Received: from ?IPv6:2001:980:57a9:1:224:e8ff:fe2a:b203? ([2001:980:57a9:1:224:e8ff:fe2a:b203]) by mx.google.com with ESMTPS id cb8sm43246480wib.0.2012.02.01.00.40.02 (version=SSLv3 cipher=OTHER); Wed, 01 Feb 2012 00:40:02 -0800 (PST) Message-ID: <4F28FA61.3000403@mabrand.nl> Date: Wed, 01 Feb 2012 09:40:01 +0100 From: Mark Brand User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0.1) Gecko/20111220 Firefox/9.0.1 SeaMonkey/2.6.1 MIME-Version: 1.0 To: libssh2-devel@cool.haxx.se Subject: libssh2 1.4.0 missing libssh_error() function? X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Hi, Just tried out the libssh2 1.4.0. When I try to link an application I get this error: > libssh2.a(libgcrypt.o):libgcrypt.c:(.text+0xf8b): undefined reference > to `__libssh_error' As far as I can tell, libssh_error() isn't defined in sources. Or am I overlooking something? regards, Mark _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 1 09:49:12 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q118n8ww016223; Wed, 1 Feb 2012 09:49:12 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q118n6kN016211 for ; Wed, 1 Feb 2012 09:49:06 +0100 Received: (qmail 30434 invoked by uid 501); 1 Feb 2012 08:49:08 -0000 Message-ID: <20120201084908.30433.qmail@stuge.se> Date: Wed, 1 Feb 2012 09:49:08 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: Several direct_tcpip channels in one SSH session Mail-Followup-To: libssh2-devel@cool.haxx.se References: <4F28F5E0.8050308@issart.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4F28F5E0.8050308@issart.com> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Denis Malyshkin wrote: > Is it possible to do opening of several direct_tcpip channels in one SSH > session simultaneously (in async mode)? > I.e. to call libssh2_channel_direct_tcpip_ex(...) several times for one > session without waiting while previous calls to it are completed. .. > As I saw in the source code, channel_direct_tcpip(...) uses some > variables in the 'session' structure (like session->direct_state, > session->direct_message and so on). So it seems that only one channel > creation call can be execute for a session at the moment. And the next > channel can be created only then a creation of the previous one is > finished (successfully or with error). Is it correct? Sure, it's pretty clear from the code and indeed your analysis. The easy way out is to use blocking mode while creating the channels, and switch to non-blocking only after they exist. This is what the example/direct-tcpip.c demonstrates. As an alternative, you can of course block in your code during creation, and not create number two until the first channel is ready. This is what you'll need to do if you already process other channels. Finally, you can of course propose an improvement of the library. I think it would be great to see an improvement in this area, and if you come up with a nice solution for direct-tcpip channels then it could also be applied to all other channel types. Note that we want to reduce the number of malloc calls in libssh2. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 1 09:56:21 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q118uDQA021104; Wed, 1 Feb 2012 09:56:20 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q118uBhc021089 for ; Wed, 1 Feb 2012 09:56:11 +0100 Received: (qmail 31034 invoked by uid 501); 1 Feb 2012 08:56:14 -0000 Message-ID: <20120201085614.31033.qmail@stuge.se> Date: Wed, 1 Feb 2012 09:56:14 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: libssh2 1.4.0 missing libssh_error() function? Mail-Followup-To: libssh2-devel@cool.haxx.se References: <4F28FA61.3000403@mabrand.nl> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4F28FA61.3000403@mabrand.nl> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Mark Brand wrote: > Just tried out the libssh2 1.4.0. When I try to link an application I get > this error: > >> libssh2.a(libgcrypt.o):libgcrypt.c:(.text+0xf8b): undefined reference to >> `__libssh_error' > > As far as I can tell, libssh_error() isn't defined in sources. Or am I > overlooking something? >:( commit 209de22299b4b58e582891dfba70f57e1e0492db Author: Peter Krempa Date: Mon Dec 19 15:02:15 2011 +0100 userauth: Provide more informations if ssh pub key extraction fails If the function that extracts/computes the public key from a private key fails the errors it reports were masked by the function calling it. This patch modifies the key extraction function to return errors using _libssh_error() function. The error messages are tweaked to contain reference to the failed operaton in addition to the reason. Both the commit message and the code refer to the completely bogus function name in one place. A few other places in the changed code get it right. Where is review before applying patches? wtf. I've pushed a fix for this. I guess 1.4.1 would be in order. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 1 13:23:17 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q11CMv7O011310; Wed, 1 Feb 2012 13:23:14 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q11CMtkm011300 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Wed, 1 Feb 2012 13:22:55 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q11CMtdJ011295 for ; Wed, 1 Feb 2012 13:22:55 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Wed, 1 Feb 2012 13:22:55 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: libssh2 1.4.0 missing libssh_error() function? In-Reply-To: <20120201085614.31033.qmail@stuge.se> Message-ID: References: <4F28FA61.3000403@mabrand.nl> <20120201085614.31033.qmail@stuge.se> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Wed, 1 Feb 2012, Peter Stuge wrote: > Where is review before applying patches? Everyone is welcome and encouraged to review them. I read the patches I apply and I also need to use my judgement and basic testing when accepting them. Sometimes that leads to broken builds like this when I've missed a flaw. Evidently, not only me but not a single person built libssh2 from git with gcrypt for over a month before the release. Getting a better and automated test system running would of course also be a good idea. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 1 14:07:05 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q11D6tKI011176; Wed, 1 Feb 2012 14:07:04 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q11D6rGZ011170 for ; Wed, 1 Feb 2012 14:06:53 +0100 Received: (qmail 18931 invoked by uid 501); 1 Feb 2012 13:06:56 -0000 Message-ID: <20120201130656.18930.qmail@stuge.se> Date: Wed, 1 Feb 2012 14:06:56 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: libssh2 1.4.0 missing libssh_error() function? Mail-Followup-To: libssh2-devel@cool.haxx.se References: <4F28FA61.3000403@mabrand.nl> <20120201085614.31033.qmail@stuge.se> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Daniel Stenberg wrote: > Getting a better and automated test system running would of course > also be a good idea. Yes! Much much better for stuff like this! I will set up Gerrit and Jenkins for libusb, once I've figured out wrinkles I'm happy to duplicate also for libssh2. There will be a Windows build environment as well. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 2 01:42:40 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q120gERS025218; Thu, 2 Feb 2012 01:42:36 +0100 Received: from mail-qy0-f182.google.com (mail-qy0-f182.google.com [209.85.216.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q120gBcE024899 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Thu, 2 Feb 2012 01:42:12 +0100 Received: by qcmt40 with SMTP id t40so1289048qcm.41 for ; Wed, 01 Feb 2012 16:42:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:date:x-google-sender-auth:message-id:subject :from:to:content-type; bh=V9n3gpM3KMV4PNSa2zysL1cNiU0Gi1H/qWJ0yqo14LY=; b=VvbMwSUZhsmA4nJI3rZ7U/5Bt0aZdA+J3XKJllOyskr6Srq6w4pn4RVU2j5PPSkAo4 0ZaFQ2ffx68mpRI+DfvklQI7gx4O4K7Chs7lmr7hDfsGgse4rcTa+w9qRCXLxVYKaTuW sfvuuvNKNm/QWFRX+iBMC2weObx9nqDXsA0Sg= MIME-Version: 1.0 Received: by 10.229.76.132 with SMTP id c4mr182973qck.134.1328143327498; Wed, 01 Feb 2012 16:42:07 -0800 (PST) Received: by 10.229.144.211 with HTTP; Wed, 1 Feb 2012 16:42:07 -0800 (PST) Date: Thu, 2 Feb 2012 00:42:07 +0000 X-Google-Sender-Auth: rW6cO7HSrlKogijmzNoqiO2gqvY Message-ID: Subject: SFTP issues From: Alexander Lamaison To: "development, libssh2" Content-Type: multipart/mixed; boundary=00032555bfa23f109604b7f07794 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se --00032555bfa23f109604b7f07794 Content-Type: text/plain; charset=ISO-8859-1 SFTP reading is completely broken for me in 1.4.0 (though it has been for a while). The last release that works for me is 1.2.7. Some revisions cause a read with a buffer larger than 65-130k to block. Other revisions cause reads to return 0 prematurely indicating the end of the file (usually around the 200k mark). Recent revisions do the latter. Using my usual test script (attached) and git bisect I've narrowed down the offending commits. Apparently, premature EOF is caused by 03ca9020756a4e16f0294e5b35e9826ee6af2364 [1] and blocking is caused by 90b4b4073f34919aa72deff61a5c9bc188c47c95 [2]. It's difficult to know how accurate these are as there were several overlapping, interacting bugs and attempts to fix them that kept changing the SFTP behaviour. This is all on Windows 7 64-bit. To try the script yourself, run it as: libssh2_bigread ip_address username password path If you run it with something like /dev/zero as the path, the expected behaviour is that it will try reading from that path with increasing buffer sizes up to about 8MB. Daniel, liuzl: we went through this process in September and you guys made some fixes which I though had solved it. I've changed both the Windows and Linux machines I'm testing on since then so I don't know if that's why the problems are back. I don't understand enough about the SFTP layer to suggest a fix but, as usual, I'll happily test any patches. Alex [1] http://git.libssh2.org/?p=libssh2.git;a=commit;h=03ca9020756a4e16f0294e5b35e9826ee6af2364;js=1 [2] http://git.libssh2.org/?p=libssh2.git;a=commit;h=90b4b4073f34919aa72deff61a5c9bc188c47c95;js=1 --00032555bfa23f109604b7f07794 Content-Type: text/x-c++src; charset=US-ASCII; name="libssh2_bigread.cpp" Content-Disposition: attachment; filename="libssh2_bigread.cpp" Content-Transfer-Encoding: base64 X-Attachment-Id: f_gy521m9h0 LyoNCiAqIFRoZSBzYW1wbGUgY29kZSBoYXMgZGVmYXVsdCB2YWx1ZXMgZm9yIGhvc3QgbmFtZSwg dXNlciBuYW1lLCBwYXNzd29yZA0KICogYW5kIHBhdGggdG8gY29weSwgYnV0IHlvdSBjYW4gc3Bl Y2lmeSB0aGVtIG9uIHRoZSBjb21tYW5kIGxpbmUgbGlrZToNCiAqDQogKiAic2Z0cCAxOTIuMTY4 LjAuMSB1c2VyIHBhc3N3b3JkIC90bXAvc2VjcmV0cyAtcHwtaXwtayINCiAqLw0KDQovLyNkZWZp bmUgVEVTVF9SRUFEX1NJWkUgNjU0MzIxMA0KI2RlZmluZSBURVNUX1JFQURfU0laRSA2NTQNCg0K I2luY2x1ZGUgPGxpYnNzaDJfY29uZmlnLmg+DQojaW5jbHVkZSA8bGlic3NoMi5oPg0KI2luY2x1 ZGUgPGxpYnNzaDJfc2Z0cC5oPg0KDQojaWZkZWYgSEFWRV9XSU5TT0NLMl9IDQojIGluY2x1ZGUg 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(8.14.4/8.14.4/Debian-2) with SMTP id q12C3e5i006055 for ; Thu, 2 Feb 2012 13:03:41 +0100 Received: (qmail 16550 invoked by uid 501); 2 Feb 2012 12:03:40 -0000 Message-ID: <20120202120340.16549.qmail@stuge.se> Date: Thu, 2 Feb 2012 13:03:40 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Hi Alex, Alexander Lamaison wrote: > SFTP reading is completely broken for me in 1.4.0 (though it has been > for a while). The last release that works for me is 1.2.7. Bad. We need to fix this. > Some revisions cause a read with a buffer larger than 65-130k to > block. Other revisions cause reads to return 0 prematurely indicating > the end of the file (usually around the 200k mark). Recent revisions > do the latter. > > Using my usual test script (attached) and git bisect I've narrowed > down the offending commits. Apparently, premature EOF is caused by > 03ca9020756a4e16f0294e5b35e9826ee6af2364 [1] and blocking is caused by > 90b4b4073f34919aa72deff61a5c9bc188c47c95 [2]. It's difficult to know > how accurate these are as there were several overlapping, interacting > bugs and attempts to fix them that kept changing the SFTP behaviour. > > This is all on Windows 7 64-bit. To try the script yourself, run it as: > libssh2_bigread ip_address username password path > If you run it with something like /dev/zero as the path, the expected > behaviour is that it will try reading from that path with increasing > buffer sizes up to about 8MB. > > Daniel, liuzl: we went through this process in September and you guys > made some fixes which I though had solved it. I've changed both the > Windows and Linux machines I'm testing on since then so I don't know > if that's why the problems are back. I don't understand enough about > the SFTP layer to suggest a fix but, as usual, I'll happily test any > patches. Could you test if this happens also from Linux to Linux? Would be good to test both on localhost on the server where Windows 7 shows this problem, and between two different Linux machines. Could you stop by IRC soonish for some more discussion and testing? //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 2 19:17:22 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q12IGw6U009843; Thu, 2 Feb 2012 19:17:19 +0100 Received: from earth.stuge.se (earth.stuge.se [212.116.89.126]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q12IGva9009832 for ; Thu, 2 Feb 2012 19:16:57 +0100 Received: (qmail 2454 invoked from network); 2 Feb 2012 18:16:56 -0000 Received: from unknown (HELO earth.stuge.se) (127.0.0.1) by localhost with SMTP; 2 Feb 2012 18:16:56 -0000 MIME-Version: 1.0 From: "libssh2 Trac" X-Trac-Version: 0.12.3dev Precedence: bulk Cc: libssh2-devel@cool.haxx.se Auto-Submitted: auto-generated X-Mailer: Trac 0.12.3dev, by Edgewall Software X-Trac-Project: libssh2 Date: Thu, 02 Feb 2012 18:16:56 -0000 X-URL: http://trac.libssh2.org/ Subject: [libssh2] #235: [PATCH] Provide symbol versioning support X-Trac-Ticket-URL: http://trac.libssh2.org/ticket/235 Message-ID: <058.a89eb02b7dab0ddfa30c898d9d68939d@libssh2.stuge.se> X-Trac-Ticket-ID: 235 X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q12IGva9009832 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Reply-To: trac@libssh2.stuge.se, libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se #235: [PATCH] Provide symbol versioning support ------------------------------------+-------------------- Reporter: crrodriguez.clavid.com | Owner: Type: defect | Status: new Priority: high | Milestone: 1.4.0 Component: API | Version: 1.3.0 Keywords: | Blocked By: Blocks: | ------------------------------------+-------------------- The attached patch provides support for symbol versioning if available, as well cleanup the symbol visibility support. This will fix a not-so-hypotethical scenario (aka.happends all the time with many different libraries) that breaks "always moving" linux distributions when upstream adds new functions without incrementing SOVERSION, resulting in inconsistent linkages, undefined symbols and broken user's systems. -- Ticket URL: libssh2 C library for writing portable SSH2 clients _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 3 07:11:45 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q136BJ67017745; Fri, 3 Feb 2012 07:11:41 +0100 Received: from mail-qw0-f54.google.com (mail-qw0-f54.google.com [209.85.216.54]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q136BF2n017696 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Fri, 3 Feb 2012 07:11:16 +0100 Received: by qaea17 with SMTP id a17so2295733qae.20 for ; Thu, 02 Feb 2012 22:11:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; bh=gaApbl5Ss5+jq9znShEc9b/Zvcd0snbfpAOXL833tAQ=; b=FqnwesJM9LP+ljGEy5nhU+unZTrfer918nrqjB5eIIRN49SJTI8+zZUQD1+Sciir/W gnmai8CAbcS4/FwOQNHLT7anY99RiMBavcYUdpjIpYX9p3n9DmfOlkkrm3t5htzt20uO Vy8X/WHNopt+rYtljA+SAEqLXKamZ+T1Axdv4= MIME-Version: 1.0 Received: by 10.224.193.66 with SMTP id dt2mr7778689qab.92.1328249469516; Thu, 02 Feb 2012 22:11:09 -0800 (PST) Received: by 10.229.39.140 with HTTP; Thu, 2 Feb 2012 22:11:09 -0800 (PST) Date: Fri, 3 Feb 2012 11:41:09 +0530 Message-ID: Subject: hi From: Gaurav Suryagandh To: libssh2-devel@cool.haxx.se X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1578641569==" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se --===============1578641569== Content-Type: multipart/alternative; boundary=20cf30050e68cdba3204b8092d4d --20cf30050e68cdba3204b8092d4d Content-Type: text/plain; charset=ISO-8859-1 Hello All, I am trying to use libssh2_channel_direct_tcpip_ex() for setting up the channel. I am able to get first request set correctly and getting right reply from the http server which is running on different machine. <<========================================>> channel machine A <-----------------------------------------> machin B (running apache) (access web) apache on 8080 mapped @ 8083 I am using select to handle multiple request, but its not helping. below is my code. rc = libssh2_init (0); if (rc != 0) { fprintf (stderr, "libssh2 initialization failed (%d)\n", rc); return 1; } /* Connect to SSH server */ sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); sin.sin_family = AF_INET; if (INADDR_NONE == (sin.sin_addr.s_addr = inet_addr(server_ip))) { perror("inet_addr"); return -1; } sin.sin_port = htons(22); if (connect(sock, (struct sockaddr*)(&sin), sizeof(struct sockaddr_in)) != 0) { fprintf(stderr, "failed to connect!\n"); return -1; } /* Create a session instance */ session = libssh2_session_init(); if(!session) { fprintf(stderr, "Could not initialize SSH session!\n"); return -1; } /* ... start it up. This will trade welcome banners, exchange keys, * * and setup crypto, compression, and MAC layers * */ rc = libssh2_session_startup(session, sock); if(rc) { fprintf(stderr, "Error when starting up SSH session: %d\n", rc); return -1; } /* At this point we havn't yet authenticated. The first thing to do * * is check the hostkey's fingerprint against our known hosts Your app * * may have it hard coded, may go to a file, may present it to the * * user, that's your call * */ fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1); fprintf(stderr, "Fingerprint: "); for(i = 0; i < 20; i++) fprintf(stderr, "%02X ", (unsigned char)fingerprint[i]); fprintf(stderr, "\n"); /* check what authentication methods are available */ userauthlist = libssh2_userauth_list(session, username, strlen(username)); printf("Authentication methods: %s\n", userauthlist); if (strstr(userauthlist, "password")) auth |= AUTH_PASSWORD; if (strstr(userauthlist, "publickey")) auth |= AUTH_PUBLICKEY; /* check for options */ if(argc > 8) { if ((auth & AUTH_PASSWORD) && !strcasecmp(argv[8], "-p")) auth = AUTH_PASSWORD; if ((auth & AUTH_PUBLICKEY) && !strcasecmp(argv[8], "-k")) auth = AUTH_PUBLICKEY; } if (auth & AUTH_PASSWORD) { if (libssh2_userauth_password(session, username, password)) { fprintf(stderr, "Authentication by password failed.\n"); goto shutdown; } } else if (auth & AUTH_PUBLICKEY) { if (libssh2_userauth_publickey_fromfile(session, username, keyfile1, keyfile2, password)) { printf("\tAuthentication by public key failed!\n"); goto shutdown; } printf("\tAuthentication by public key succeeded.\n"); } else { printf("No supported authentication methods found!\n"); goto shutdown; } listensock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); sin.sin_family = AF_INET; sin.sin_port = htons(local_listenport); if (INADDR_NONE == (sin.sin_addr.s_addr = inet_addr(local_listenip))) { perror("inet_addr"); goto shutdown; } sockopt = 1; setsockopt(listensock, SOL_SOCKET, SO_REUSEADDR, &sockopt, sizeof(sockopt)); sinlen=sizeof(sin); if (-1 == bind(listensock, (struct sockaddr *)&sin, sinlen)) { perror("bind - 1 "); goto shutdown; } if (-1 == listen(listensock, 2)) { perror("listen"); goto shutdown; } printf("Waiting for TCP connection on %s:%d...\n", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port)); forwardsock = accept(listensock, (struct sockaddr *)&sin, &sinlen); if (-1 == forwardsock) { perror("accept"); goto shutdown; } shost = inet_ntoa(sin.sin_addr); sport = ntohs(sin.sin_port); printf("Forwarding connection from %s:%d here to remote %s:%d\n", shost, sport, remote_desthost, remote_destport); channel = libssh2_channel_direct_tcpip_ex(session, remote_desthost, remote_destport, shost, sport); if (!channel) { fprintf(stderr, "Could not open the direct-tcpip channel!\n" "(Note that this can be a problem at the server!" " Please review the server logs.)\n"); goto shutdown; } /* Must use non-blocking IO hereafter due to the current libssh2 API */ libssh2_session_set_blocking(session, 0); while (1) { FD_ZERO(&fds); FD_SET(forwardsock, &fds); tv.tv_sec = 0; tv.tv_usec = 100000; rc = select(forwardsock + 1, &fds, NULL, NULL, &tv); if (-1 == rc) { perror("select"); goto shutdown; } if (rc && FD_ISSET(forwardsock, &fds)) { len = recv(forwardsock, buf, sizeof(buf), 0); if (len < 0) { perror("read"); goto shutdown; } else if (0 == len) { printf("The client at %s:%d disconnected!\n", shost, sport); goto shutdown; } wr = 0; do { i = libssh2_channel_write(channel, buf, len); if (i < 0) { fprintf(stderr, "libssh2_channel_write: %d\n", i); goto shutdown; } wr += i; } while(i > 0 && wr < len); } while (1) { len = libssh2_channel_read(channel, buf, sizeof(buf)); if (LIBSSH2_ERROR_EAGAIN == len) break; else if (len < 0) { fprintf(stderr, "libssh2_channel_read: %d", (int)len); goto shutdown; } wr = 0; while (wr < len) { i = send(forwardsock, buf + wr, len - wr, 0); if (i <= 0) { perror("write"); goto shutdown; } wr += i; } if (libssh2_channel_eof(channel)) { printf("The server at %s:%d disconnected!\n", remote_desthost, remote_destport); goto shutdown; } } } shutdown: #ifdef WIN32 closesocket(forwardsock); closesocket(listensock); #else close(forwardsock); close(listensock); #endif if (channel) libssh2_channel_free(channel); libssh2_session_disconnect(session, "Client disconnecting normally"); libssh2_session_free(session); #ifdef WIN32 closesocket(sock); #else close(sock); #endif libssh2_exit(); Please let me know if something is wrong with this code. Thanks, Gaurav --20cf30050e68cdba3204b8092d4d Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hello All,

I am trying to use libssh2_channel_direct_tcpip= _ex() for setting up=A0 the
channel.

I am able to get first request set correctly an= d getting right reply
from the http server which is running on differ= ent machine.

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 &= lt;<=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D>> channel
machine A=A0=A0=A0=A0=A0=A0 <---------------= --------------------------> machin B
(running apache)=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0 (access web)

apache on 8080=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 mapped @
8083


I am using select to handle multiple request, b= ut its not helping.
below is my code.

=A0=A0=A0 rc =3D libssh2_init (0);<= br>
=A0=A0=A0 if (rc !=3D 0) {
=A0=A0=A0=A0=A0=A0=A0 fprintf (stderr, "li= bssh2 initialization failed (%d)\n", rc);
=A0=A0=A0=A0=A0=A0=A0 return 1;
=A0=A0=A0 }

=A0=A0=A0 /* Connect to SSH server */
=A0=A0=A0 sock =3D socket(PF_INET, SOCK_STREAM,= IPPROTO_TCP);
=A0=A0=A0 sin.sin_family =3D AF_INET;
=A0=A0=A0 if (INADDR_NONE =3D=3D (sin.sin_addr.= s_addr =3D inet_addr(server_ip))) {
=A0=A0=A0=A0=A0=A0=A0 perror("inet_addr&qu= ot;);
=A0=A0=A0=A0=A0=A0=A0 return -1; =A0=A0=A0 }
=A0=A0=A0 sin.sin_port =3D htons(22);
=A0=A0=A0 if (connect(sock, (struct sockaddr*)(= &sin),
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 s= izeof(struct sockaddr_in)) !=3D 0) {
=A0=A0=A0=A0=A0=A0=A0 fprintf(stderr, "fai= led to connect!\n");
=A0=A0=A0=A0=A0=A0=A0 return -1; =A0=A0=A0 }

=A0=A0=A0 /* Create a session instance */
=A0=A0=A0 session =3D libssh2_session_init();

=A0=A0=A0 if(!session) {
=A0=A0=A0=A0=A0=A0=A0 fprintf(stderr, "Cou= ld not initialize SSH session!\n");
=A0=A0=A0=A0=A0=A0=A0 return -1; =A0=A0=A0 }

=A0=A0=A0 /* ... start it up. This will trade w= elcome banners, exchange keys,
=A0=A0=A0=A0 *=A0=A0=A0=A0=A0 * and setup crypt= o, compression, and MAC layers
=A0=A0=A0=A0 *=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 */=
=A0=A0=A0 rc =3D libssh2_session_startup(sessio= n, sock);

=A0=A0=A0 if(rc) {
=A0=A0=A0=A0=A0=A0=A0 fprintf(stderr, "Err= or when starting up SSH session: %d\n", rc);
=A0=A0=A0=A0=A0=A0=A0 return -1; =A0=A0=A0 }

=A0=A0=A0 /* At this point we havn't yet au= thenticated.=A0 The first thing to do
=A0=A0=A0=A0 *=A0=A0=A0=A0=A0 * is check the ho= stkey's fingerprint against our known hosts
Your app
=A0=A0=A0=A0 *=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 * = may have it hard coded, may go to a file, may present
it to the
=A0=A0=A0=A0 *=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0 * user, that's your call
=A0=A0=A0=A0 *=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0 */
=A0=A0=A0 fingerprint =3D libssh2_hostkey_hash(= session,
LIBSSH2_HOSTKEY_HASH_SHA1);

=A0=A0=A0 fprintf(stderr, "Fingerprint: &q= uot;);
=A0=A0=A0 for(i =3D 0; i < 20; i++)
=A0=A0=A0=A0=A0=A0=A0 fprintf(stderr, "%02= X ", (unsigned char)fingerprint[i]);
=A0=A0=A0 fprintf(stderr, "\n");

=A0=A0=A0 /* check what authentication methods = are available */
=A0=A0=A0 userauthlist =3D libssh2_userauth_lis= t(session, username,
strlen(username));

=A0=A0=A0 printf("Authentication methods: = %s\n", userauthlist);
=A0=A0=A0 if (strstr(userauthlist, "passwo= rd"))
=A0=A0=A0=A0=A0=A0=A0 auth |=3D AUTH_PASSWORD;<= /font>
=A0=A0=A0 if (strstr(userauthlist, "public= key"))
=A0=A0=A0=A0=A0=A0=A0 auth |=3D AUTH_PUBLICKEY;=

=A0=A0=A0 /* check for options */ <= br> =A0=A0=A0 if(argc > 8) {
=A0=A0=A0=A0=A0=A0=A0 if ((auth & AUTH_PASS= WORD) && !strcasecmp(argv[8], "-p"))
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 auth =3D AUTH= _PASSWORD;
=A0=A0=A0=A0=A0=A0=A0 if ((auth & AUTH_PUBL= ICKEY) && !strcasecmp(argv[8], "-k"))
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 auth =3D AUTH= _PUBLICKEY;
=A0=A0=A0 }

=A0=A0=A0 if (auth & AUTH_PASSWORD) {
=A0=A0=A0=A0=A0=A0=A0 if (libssh2_userauth_pass= word(session, username, password)) {

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 fprintf(stder= r, "Authentication by password failed.\n");
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 goto shutdown= ;
=A0=A0=A0=A0=A0=A0=A0 }
=A0=A0=A0 } else if (auth & AUTH_PUBLICKEY)= {
=A0=A0=A0=A0=A0=A0=A0 if (libssh2_userauth_publ= ickey_fromfile(session, username,
keyfile1,

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0 keyfile2, password)) {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 printf("= \tAuthentication by public key failed!\n");
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 goto shutdown= ;
=A0=A0=A0=A0=A0=A0=A0 }
=A0=A0=A0=A0=A0=A0=A0 printf("\tAuthentica= tion by public key succeeded.\n");
=A0=A0=A0 } else {
=A0=A0=A0=A0=A0=A0=A0 printf("No supported= authentication methods found!\n");
=A0=A0=A0=A0=A0=A0=A0 goto shutdown;
=A0=A0=A0 }

=A0=A0=A0 listensock =3D socket(PF_INET, SOCK_S= TREAM, IPPROTO_TCP);
=A0=A0=A0 sin.sin_family =3D AF_INET;
=A0=A0=A0 sin.sin_port =3D htons(local_listenpo= rt);
=A0=A0=A0 if (INADDR_NONE =3D=3D (sin.sin_addr.= s_addr =3D
inet_addr(local_listenip))) {
=A0=A0=A0=A0=A0=A0=A0 perror("inet_addr&qu= ot;);
=A0=A0=A0=A0=A0=A0=A0 goto shutdown;
=A0=A0=A0 }
=A0=A0=A0 sockopt =3D 1;
=A0=A0=A0 setsockopt(listensock, SOL_SOCKET, SO= _REUSEADDR, &sockopt,
sizeof(sockopt));
=A0=A0=A0 sinlen=3Dsizeof(sin);
=A0=A0=A0 if (-1 =3D=3D bind(listensock, (struc= t sockaddr *)&sin, sinlen)) {
=A0=A0=A0=A0=A0=A0=A0 perror("bind - 1 &qu= ot;);
=A0=A0=A0=A0=A0=A0=A0 goto shutdown;
=A0=A0=A0 }
=A0=A0=A0 if (-1 =3D=3D listen(listensock, 2)) = {
=A0=A0=A0=A0=A0=A0=A0 perror("listen"= );
=A0=A0=A0=A0=A0=A0=A0 goto shutdown;
=A0=A0=A0 }

=A0=A0=A0 printf("Waiting for TCP connecti= on on %s:%d...\n",
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 inet_ntoa(sin= .sin_addr), ntohs(sin.sin_port));

=A0=A0=A0 forwardsock =3D accept(listensock, (s= truct sockaddr *)&sin, &sinlen);
=A0=A0=A0 if (-1 =3D=3D forwardsock) {
=A0=A0=A0=A0=A0=A0=A0 perror("accept"= );
=A0=A0=A0=A0=A0=A0=A0 goto shutdown;
=A0=A0=A0 }

=A0=A0=A0 shost =3D inet_ntoa(sin.sin_addr);
=A0=A0=A0 sport =3D ntohs(sin.sin_port);=

=A0=A0=A0 printf("Forwarding connection fr= om %s:%d here to remote %s:%d\n",
shost,
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 sport, remote= _desthost, remote_destport);

=A0=A0=A0 channel =3D libssh2_channel_direct_tc= pip_ex(session, remote_desthost,

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 remote_destpo= rt, shost, sport);
=A0=A0=A0 if (!channel) {
=A0=A0=A0=A0=A0=A0=A0 fprintf(stderr, "Cou= ld not open the direct-tcpip channel!\n"
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 &= quot;(Note that this can be a problem at the server!"
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 &= quot; Please review the server logs.)\n");
=A0=A0=A0=A0=A0=A0=A0 goto shutdown;
=A0=A0=A0 }

=A0=A0=A0 /* Must use non-blocking IO hereafter= due to the current libssh2 API
*/
=A0=A0=A0 libssh2_session_set_blocking(session,= 0);


=A0=A0=A0 while (1) {
=A0=A0=A0=A0=A0=A0=A0 FD_ZERO(&fds);=
=A0=A0=A0=A0=A0=A0=A0 FD_SET(forwardsock, &= fds);
=A0=A0=A0=A0=A0=A0=A0 tv.tv_sec =3D 0;
=A0=A0=A0=A0=A0=A0=A0 tv.tv_usec =3D 100000;
=A0=A0=A0=A0=A0=A0=A0 rc =3D select(forwardsock= + 1, &fds, NULL, NULL, &tv);
=A0=A0=A0=A0=A0=A0=A0 if (-1 =3D=3D rc) {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 perror("= select");
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 goto shutdown= ;
=A0=A0=A0=A0=A0=A0=A0 }
=A0=A0=A0=A0=A0=A0=A0 if (rc && FD_ISSE= T(forwardsock, &fds)) {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 len =3D recv(= forwardsock, buf, sizeof(buf), 0);
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 if (len < = 0) {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 p= error("read");
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 g= oto shutdown;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 } else if (0 = =3D=3D len) {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 p= rintf("The client at %s:%d disconnected!\n", shost, sport);
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 g= oto shutdown;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 }=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 wr =3D 0;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 do {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 i= =3D libssh2_channel_write(channel, buf, len);

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 i= f (i < 0) {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0 fprintf(stderr, "libssh2_channel_write: %d\n", i);
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0 goto shutdown;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 }=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 w= r +=3D i;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 } while(i >= ; 0 && wr < len);
=A0=A0=A0=A0=A0=A0=A0 }
=A0=A0=A0=A0=A0=A0=A0 while (1) { =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 len =3D libss= h2_channel_read(channel, buf, sizeof(buf));

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 if (LIBSSH2_E= RROR_EAGAIN =3D=3D len)
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 b= reak;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 else if (len = < 0) {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 f= printf(stderr, "libssh2_channel_read: %d", (int)len);=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 g= oto shutdown;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 }=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 wr =3D 0;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 while (wr <= ; len) {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 i= =3D send(forwardsock, buf + wr, len - wr, 0);
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 i= f (i <=3D 0) {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0 perror("write");
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0 goto shutdown;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 }=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 w= r +=3D i;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 }=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 if (libssh2_c= hannel_eof(channel)) {

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 p= rintf("The server at %s:%d disconnected!\n",
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0 remote_desthost, remote_destport);
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 g= oto shutdown;
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 }=
=A0=A0=A0=A0=A0=A0=A0 }
=A0=A0=A0 }

shutdown:
#ifdef WIN32
=A0=A0=A0 closesocket(forwardsock);=
=A0=A0=A0 closesocket(listensock);<= br> #else
=A0=A0=A0 close(forwardsock);
=A0=A0=A0 close(listensock);
#endif
=A0=A0=A0 if (channel)
=A0=A0=A0=A0=A0=A0=A0 libssh2_channel_free(chan= nel);

=A0=A0=A0 libssh2_session_disconnect(session, &= quot;Client disconnecting
normally");

=A0=A0=A0 libssh2_session_free(session);=


#ifdef WIN32
=A0=A0=A0 closesocket(sock);
#else
=A0=A0=A0 close(sock);
#endif

=A0=A0=A0 libssh2_exit();


Please let me know if something is wrong with t= his code.

Thanks,
Gaurav




--20cf30050e68cdba3204b8092d4d-- --===============1578641569== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel --===============1578641569==-- From libssh2-devel-bounces@cool.haxx.se Sat Feb 4 13:28:15 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q14CRmxJ006770; Sat, 4 Feb 2012 13:28:10 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q14CRlwC006761 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Sat, 4 Feb 2012 13:27:47 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q14CRkQI006758 for ; Sat, 4 Feb 2012 13:27:46 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Sat, 4 Feb 2012 13:27:46 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Thu, 2 Feb 2012, Alexander Lamaison wrote: > Daniel, liuzl: we went through this process in September and you guys made > some fixes which I though had solved it. I've changed both the Windows and > Linux machines I'm testing on since then so I don't know if that's why the > problems are back. I don't understand enough about the SFTP layer to > suggest a fix but, as usual, I'll happily test any patches. I too was under the impression we improved things, and I know a lot of people have used libssh2 fine since then too so the problems you see might not trigger that often in the real world. I haven't yet investigated what you report here, but I'll try to set aside some time to dig into the details again soon and see if I can produce some patches to try out. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sat Feb 4 14:09:49 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q14D9bCI005830; Sat, 4 Feb 2012 14:09:49 +0100 Received: from mail0.avcosystems.co.uk (mail0.avcosystems.co.uk [195.224.236.86]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q14D9aMV005758 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=NOT) for ; Sat, 4 Feb 2012 14:09:36 +0100 Received: from lexx.avco ([192.168.0.1] helo=lyta) by mail0.avcosystems.co.uk with esmtp (Exim 4.69 #1 (Debian)) (envelope-from ) id 1RtfMj-0006AU-L7 for ; Sat, 04 Feb 2012 13:09:17 +0000 From: "Mark Smith" To: "'libssh2 development'" References: Subject: RE: SFTP issues Date: Sat, 4 Feb 2012 13:09:31 -0000 Keywords: Not filed Message-ID: MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook 11 x-mimeole: Produced By Microsoft MimeOLE V6.00.2900.6157 Thread-Index: AczjOHeIXL0ZzU5URfmBIXCH1IHAvAAA57ZQ In-Reply-To: X-AVCO-Scan-Signature: 993d51beb024916ef0b29a243affd9c9 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se I've encountered a similar problem on a 64bit Win2008 server whereby the buffer size makes a difference as to whether a read returns zero incorrectly or not. I'll try to put together a native example on Monday as all I have right now is my wrapped .NET example: read from an empty file with a buffer of 27000, which returns zero correctly, then on the same SFTP connection read from a 57 byte file with the same buffer and I always get zero back. It doesn't seem to matter if there's no delay between the two reads or if I allow a minute to pass, it still behaves the same. If I change the buffer size to 26999 and I get 57 back correctly. If I run this exact same test on a 32bit WinXP machine it always returns correctly irrespective of buffer size. I've tried testing against different SFTP servers and machines (specifically freeSSHd on the local Win2k8 machine, freeSSHd on the WinXP machine and debian's openssh) and the test behaves the same against all of them. This is completely reproducible for me and occurs every single time I try. Let me know if you'd like me to try out any patches or need trace or debug information and I'll see what I can do. -----Original Message----- From: libssh2-devel-bounces@cool.haxx.se [mailto:libssh2-devel-bounces@cool.haxx.se] On Behalf Of Daniel Stenberg Sent: 04 February 2012 12:28 To: libssh2 development Subject: Re: SFTP issues On Thu, 2 Feb 2012, Alexander Lamaison wrote: > Daniel, liuzl: we went through this process in September and you guys made > some fixes which I though had solved it. I've changed both the Windows and > Linux machines I'm testing on since then so I don't know if that's why the > problems are back. I don't understand enough about the SFTP layer to > suggest a fix but, as usual, I'll happily test any patches. I too was under the impression we improved things, and I know a lot of people have used libssh2 fine since then too so the problems you see might not trigger that often in the real world. I haven't yet investigated what you report here, but I'll try to set aside some time to dig into the details again soon and see if I can produce some patches to try out. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sat Feb 4 18:09:56 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q14H9T9P013982; Sat, 4 Feb 2012 18:09:51 +0100 Received: from mail-qw0-f47.google.com (mail-qw0-f47.google.com [209.85.216.47]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q14H9Rp0013914 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Sat, 4 Feb 2012 18:09:27 +0100 Received: by qadz30 with SMTP id z30so1449669qad.20 for ; Sat, 04 Feb 2012 09:09:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type :content-transfer-encoding; bh=Z4KmNwlFhmNrqHmTuC8KIHGNy2iIYrFzA+cBMNQS2Js=; b=oOB8l1pBYsRZOxVHpZaJwtlroa595oIkGtRcURS3KxAxRIIVTUCh5SGjJFspX7jaCe nXm4XZTrXW/lu5daEdv9PLA3ebzw6VQA2/En84Qpwg71oIEAdoJSwuJC/Yj+wzaj6Jkk 2T8eypR8IHbTa+hbstB7L/htwtGQ/wFhUjT7o= MIME-Version: 1.0 Received: by 10.224.105.203 with SMTP id u11mr13801277qao.77.1328375361187; Sat, 04 Feb 2012 09:09:21 -0800 (PST) Received: by 10.229.144.211 with HTTP; Sat, 4 Feb 2012 09:09:21 -0800 (PST) In-Reply-To: References: Date: Sat, 4 Feb 2012 17:09:21 +0000 X-Google-Sender-Auth: 8jQh_BWBjDzXAVQVcRLguq1E-Qk Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q14H9Rp0013914 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q14H9T9P013982 On 4 February 2012 12:27, Daniel Stenberg wrote: > I haven't yet investigated what you report here, but I'll try to set aside > some time  to dig into the details again soon and see if I can produce some > patches to try out. I think I've identified a pattern to the failures and a potential cause. If you find a moment to chat on IRC I could use some help with a couple of questions. Alex -- Swish - Easy SFTP for Windows Explorer (http://www.swish-sftp.org) _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sun Feb 5 11:36:38 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q15AaBOT029756; Sun, 5 Feb 2012 11:36:32 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q15Aa9km029746 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Sun, 5 Feb 2012 11:36:09 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q15Aa9ho029741 for ; Sun, 5 Feb 2012 11:36:09 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Sun, 5 Feb 2012 11:36:09 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Sat, 4 Feb 2012, Alexander Lamaison wrote: > I think I've identified a pattern to the failures and a potential cause. > If you find a moment to chat on IRC I could use some help with a couple of > questions. Cool, I'm usually most reliably around on IRC from 22 CET and onwards most evenings. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 7 14:33:05 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17DWg5x029660; Tue, 7 Feb 2012 14:33:01 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17DWee4029638 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Tue, 7 Feb 2012 14:32:40 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q17DWeqA029634 for ; Tue, 7 Feb 2012 14:32:40 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Tue, 7 Feb 2012 14:32:40 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="1129329158-1072963663-1328621316=:14182" Content-ID: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --1129329158-1072963663-1328621316=:14182 Content-Type: TEXT/PLAIN; CHARSET=US-ASCII; format=flowed Content-ID: On Sun, 5 Feb 2012, Daniel Stenberg wrote: >> I think I've identified a pattern to the failures and a potential cause. If >> you find a moment to chat on IRC I could use some help with a couple of >> questions. If there are others interested in this work, me and Alexander had a go at his problem yesterday and together we managed to identify the problem and come up with a fix for it. The attached 0001*patch is that fix. I identified the same basic flaw in the sftp_write() code path and wrote up a patch for that as well, as can be seen in the attached 0002*patch. I'm interested in feedback on both how they work in reality but also on the actual technical subtleties. I am especially aware that this logic needs better comments/documentation to make us less likely to re-introduce similar problems again in the future! -- / daniel.haxx.se --1129329158-1072963663-1328621316=:14182 Content-Type: TEXT/X-DIFF; NAME=0001-sftp_read-avoid-data-and-EAGAIN.patch Content-Transfer-Encoding: BASE64 Content-ID: Content-Description: Content-Disposition: ATTACHMENT; FILENAME=0001-sftp_read-avoid-data-and-EAGAIN.patch RnJvbSA0NDZjNmQzZmRmY2NiNmNmMzEwZjAzMTRiMTBmMDM1NjljNTE5ZGEz IE1vbiBTZXAgMTcgMDA6MDA6MDAgMjAwMQ0KRnJvbTogRGFuaWVsIFN0ZW5i ZXJnIDxkYW5pZWxAaGF4eC5zZT4NCkRhdGU6IE1vbiwgNiBGZWIgMjAxMiAy MzoyNzoxMiArMDEwMA0KU3ViamVjdDogW1BBVENIIDEvMl0gc2Z0cF9yZWFk OiBhdm9pZCBkYXRhICphbmQqIEVBR0FJTg0KDQpXaGVuZXZlciB3ZSBoYXZl IGRhdGEgYW5kIGlzIGFib3V0IHRvIGNhbGwgYSBmdW5jdGlvbiB0aGF0ICpN QVkqIHJldHVybg0KRUFHQUlOIHdlIG11c3QgcmV0dXJuIHRoZSBkYXRhIG5v dyBhbmQgd2FpdCB0byBnZXQgY2FsbGVkIGFnYWluLiBPdXIgQVBJDQpvbmx5 IGFsbG93cyBkYXRhICpvciogRUFHQUlOIGFuZCB3ZSBtdXN0IG5ldmVyIHRy 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LSAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICJXb3VsZCBibG9jayBz ZnRwX3dyaXRlIik7DQorDQogICAgIGVsc2UNCiAgICAgICAgIHJldHVybiAw OyAvKiBub3RoaW5nIHdhcyBhY2tlZCwgYW5kIG5vIEVBR0FJTiB3YXMgcmVj ZWl2ZWQhICovDQogfQ0KLS0gDQoxLjcuOQ0KDQo= --1129329158-1072963663-1328621316=:14182 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel --1129329158-1072963663-1328621316=:14182-- From libssh2-devel-bounces@cool.haxx.se Tue Feb 7 14:45:51 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17DjlkP008712; Tue, 7 Feb 2012 14:45:51 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q17DjkNn008702 for ; Tue, 7 Feb 2012 14:45:46 +0100 Received: (qmail 2588 invoked by uid 501); 7 Feb 2012 13:45:47 -0000 Message-ID: <20120207134547.2587.qmail@stuge.se> Date: Tue, 7 Feb 2012 14:45:47 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Daniel Stenberg wrote: > @@ -1218,16 +1218,17 @@ static ssize_t sftp_read(LIBSSH2_SFTP_HANDLE * handle, char *buffer, > > while(chunk) { > if(chunk->lefttosend) { > + if(total_read) > + /* since we risk getting EAGAIN below, we return here if there > + is data available */ > + return total_read; > + > rc = _libssh2_channel_write(channel, 0, > &chunk->packet[chunk->sent], > chunk->lefttosend); > if(rc < 0) { > - if(rc != LIBSSH2_ERROR_EAGAIN) > - /* error */ > - return rc; > - eagain++; > sftp->read_state = libssh2_NB_state_sent; > - break; > + return rc; > } It doesn't seem like there is any point in having this loop anymore, since libssh2 must return after every call to _channel_write() in any case. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 7 16:34:31 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17FY8ff024848; Tue, 7 Feb 2012 16:34:28 +0100 Received: from mail-qw0-f54.google.com (mail-qw0-f54.google.com [209.85.216.54]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17FY5TE024551 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Tue, 7 Feb 2012 16:34:06 +0100 Received: by qaea17 with SMTP id a17so4675415qae.20 for ; Tue, 07 Feb 2012 07:33:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type :content-transfer-encoding; bh=2PligTu3MkHicESV23UjgPC3B8ak8YDDHTMCQDgEoa4=; b=HXjY3g0izdudtCZqH5yDHj2mgKfDucThXDzM/gcEBrm7Qs3ORe2/chfEOLWEZyueNz z+jQqHnbSxXRNR4Yea6J6W8cz+AQ+MpUB97vKBPZRS+fAvcHn1WaEQRnu95zJEtvG7FI aPtN+Wfo2QonZs0q5m5rd2sFWtxDx7AbktTho= MIME-Version: 1.0 Received: by 10.224.106.196 with SMTP id y4mr5183638qao.90.1328628838419; Tue, 07 Feb 2012 07:33:58 -0800 (PST) Received: by 10.229.144.211 with HTTP; Tue, 7 Feb 2012 07:33:58 -0800 (PST) In-Reply-To: <20120207134547.2587.qmail@stuge.se> References: <20120207134547.2587.qmail@stuge.se> Date: Tue, 7 Feb 2012 15:33:58 +0000 X-Google-Sender-Auth: jTWb4r82xGeIsdRwf7l6EsNfRRg Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q17FY5TE024551 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q17FY8ff024848 On 7 February 2012 13:45, Peter Stuge wrote: > Daniel Stenberg wrote: >> @@ -1218,16 +1218,17 @@ static ssize_t sftp_read(LIBSSH2_SFTP_HANDLE * handle, char *buffer, >> >>      while(chunk) { >>          if(chunk->lefttosend) { >> +            if(total_read) >> +                /* since we risk getting EAGAIN below, we return here if there >> +                   is data available */ >> +                return total_read; >> + >>              rc = _libssh2_channel_write(channel, 0, >>                                          &chunk->packet[chunk->sent], >>                                          chunk->lefttosend); >>              if(rc < 0) { >> -                if(rc != LIBSSH2_ERROR_EAGAIN) >> -                    /* error */ >> -                    return rc; >> -                eagain++; >>                  sftp->read_state = libssh2_NB_state_sent; >> -                break; >> +                return rc; >>              } > > It doesn't seem like there is any point in having this loop anymore, > since libssh2 must return after every call to _channel_write() in any > case. Not every call, right? Only when it returns an error. Though I think it might be a bug setting libssh2_NB_state_sent on every error case. Shouldn't it only happen for EAGAIN? Otherwise any channel failure leaves expecting to continue a previous, interrupted, read rather than starting a new one. Alex -- Swish - Easy SFTP for Windows Explorer (http://www.swish-sftp.org) _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 7 17:20:51 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17GKbCw025771; Tue, 7 Feb 2012 17:20:50 +0100 Received: from mail-qw0-f54.google.com (mail-qw0-f54.google.com [209.85.216.54]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17GKZWl025736 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Tue, 7 Feb 2012 17:20:36 +0100 Received: by qaea17 with SMTP id a17so4715223qae.20 for ; Tue, 07 Feb 2012 08:20:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; bh=wEI3Do75Q1qKlpXHBIIwZGDXZWV78wwVUsImY8hB0fk=; b=DqReSsr16lgSDA4F8WtkRJrOEhJbrxiZk34PW2rxvXVbgcVV5SGQfYbD3AvjnPJ9Jo F29rNwq1z0F4cIRhrSIRO4qwGdAVVnxHsMAZhOFZ256PXJpcdy2cw3pM8SG8buKGZ21/ l30QQvOmzN4qvsuMOlol3rDxPeHRNug2KvZFY= MIME-Version: 1.0 Received: by 10.224.184.79 with SMTP id cj15mr22336735qab.78.1328631631514; Tue, 07 Feb 2012 08:20:31 -0800 (PST) Received: by 10.229.144.211 with HTTP; Tue, 7 Feb 2012 08:20:31 -0800 (PST) In-Reply-To: References: Date: Tue, 7 Feb 2012 16:20:31 +0000 X-Google-Sender-Auth: 9eSSMav2m80ABJFq0Hv2rwAvKf8 Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 7 February 2012 13:32, Daniel Stenberg wrote: > I identified the same basic flaw in the sftp_write() code path and wrote up > a patch for that as well, as can be seen in the attached 0002*patch. Dan, I think you introduced a new write_state member but forgot to include the changes to libssh2_priv.h in the patch. Alex _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 7 17:38:39 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17GcDx4002750; Tue, 7 Feb 2012 17:38:31 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q17GcBtg002688 for ; Tue, 7 Feb 2012 17:38:11 +0100 Received: (qmail 16776 invoked by uid 501); 7 Feb 2012 16:38:12 -0000 Message-ID: <20120207163812.16775.qmail@stuge.se> Date: Tue, 7 Feb 2012 17:38:12 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: <20120207134547.2587.qmail@stuge.se> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q17GcDx4002750 Alexander Lamaison wrote: > >>      while(chunk) { .. > >>              rc = _libssh2_channel_write(channel, 0, > >>                                          &chunk->packet[chunk->sent], > >>                                          chunk->lefttosend); .. > > It doesn't seem like there is any point in having this loop anymore, > > since libssh2 must return after every call to _channel_write() in any > > case. > > Not every call, right? Only when it returns an error. Yes, every call, because if there was data received successfully it must be given back to the caller before trying to write to the channel again, since writing can cause EAGAIN. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 7 17:42:58 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17GgtcU009297; Tue, 7 Feb 2012 17:42:57 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q17Ggr8e009285 for ; Tue, 7 Feb 2012 17:42:53 +0100 Received: (qmail 17097 invoked by uid 501); 7 Feb 2012 16:42:54 -0000 Message-ID: <20120207164254.17096.qmail@stuge.se> Date: Tue, 7 Feb 2012 17:42:54 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: <20120207134547.2587.qmail@stuge.se> <20120207163812.16775.qmail@stuge.se> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20120207163812.16775.qmail@stuge.se> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q17GgtcU009297 Peter Stuge wrote: > > >>      while(chunk) { > .. > > >>              rc = _libssh2_channel_write(channel, 0, > > >>                                          &chunk->packet[chunk->sent], > > >>                                          chunk->lefttosend); > .. > > > It doesn't seem like there is any point in having this loop anymore, > > > since libssh2 must return after every call to _channel_write() in any > > > case. > > > > Not every call, right? Only when it returns an error. > > Yes, every call, because if there was data received successfully it > must be given back to the caller before trying to write to the > channel again, since writing can cause EAGAIN. That sounded backwards, but the point holds, the call must return for every successful transfer since the next transfer can always result in EAGAIN and libssh2 can return only "some data transfered" or EAGAIN. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 7 17:46:57 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17GksDU012016; Tue, 7 Feb 2012 17:46:56 +0100 Received: from mail-qy0-f182.google.com (mail-qy0-f182.google.com [209.85.216.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17GkouE011959 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Tue, 7 Feb 2012 17:46:51 +0100 Received: by qcmt40 with SMTP id t40so4984238qcm.41 for ; Tue, 07 Feb 2012 08:46:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; bh=j++M539wjkess0As3pxyw6xmIOqWcu7smmrUXZ9DIGo=; b=tts2ZLZ3tWvQWhVt+Fdtl+bE1PALnrypEiG9z6kN4/71lnQrZQ0vktIAR0pIdvmZu4 IN9WQtT37i7ZJ/+ONDRWALWEmI7lhNHRO9Ar8DMBrUW0klXZK2icq6pVNIqqLC5Swztn Rjur5t5tZ1PmKa015HofzbpOghc1n7sYi5B3M= MIME-Version: 1.0 Received: by 10.224.106.196 with SMTP id y4mr5699209qao.90.1328633206745; Tue, 07 Feb 2012 08:46:46 -0800 (PST) Received: by 10.229.144.211 with HTTP; Tue, 7 Feb 2012 08:46:46 -0800 (PST) In-Reply-To: References: Date: Tue, 7 Feb 2012 16:46:46 +0000 X-Google-Sender-Auth: CbSuYt8tZJnVcqbJIQPQWZbD6XE Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development Content-Type: multipart/mixed; boundary=20cf3074b44053297204b86286ad X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se --20cf3074b44053297204b86286ad Content-Type: text/plain; charset=ISO-8859-1 On 7 February 2012 13:32, Daniel Stenberg wrote: > On Sun, 5 Feb 2012, Daniel Stenberg wrote: > >>> I think I've identified a pattern to the failures and a potential cause. >>> If you find a moment to chat on IRC I could use some help with a couple of >>> questions. > > If there are others interested in this work, me and Alexander had a go at > his problem yesterday and together we managed to identify the problem and > come up with a fix for it. The attached 0001*patch is that fix. This patch is based on Dan's first one and changes sftp_read to use a switch statement instead of gotos. I think it highlights (but doesn't fix) a few issues: - should 'already' be caulculated later as the processing of leftovers can change the offset it is based on - why do we not return immediately when we've processed leftovers; as Peter pointed out, we aren't allowed to anything that could access the transport layer anyway in that case so why carry on? - why does the second 'phase' set the next state as state_idle rather than state_sent2 (not that it's actually used but it documents intent) - is total_read guaranteed to be > 0 at the end of the function (where it previously MOOed) - why check total_read in the second phase while-loop? the loop doesn't change it Alex --20cf3074b44053297204b86286ad Content-Type: application/octet-stream; name="0001-Cleaned-up-sftp_read-and-added-more-explanation.patch" Content-Disposition: attachment; filename="0001-Cleaned-up-sftp_read-and-added-more-explanation.patch" Content-Transfer-Encoding: base64 X-Attachment-Id: f_gyd5lt552 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--20cf3074b44053297204b86286ad-- From libssh2-devel-bounces@cool.haxx.se Tue Feb 7 19:17:11 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17IGqTr008658; Tue, 7 Feb 2012 19:17:09 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17IGoFZ008643 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Tue, 7 Feb 2012 19:16:50 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q17IGoox008638 for ; Tue, 7 Feb 2012 19:16:50 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Tue, 7 Feb 2012 19:16:50 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Tue, 7 Feb 2012, Alexander Lamaison wrote: > Dan, I think you introduced a new write_state member but forgot to include > the changes to libssh2_priv.h in the patch. Oops, yes I missed adding src/sftp.h to the patch. I'll repost that (fixed) patch once we've worked out the sftp_read() quirks. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 7 19:49:51 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17Ineok031863; Tue, 7 Feb 2012 19:49:50 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q17IndpZ031822 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Tue, 7 Feb 2012 19:49:39 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q17IncFw031818 for ; Tue, 7 Feb 2012 19:49:38 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Tue, 7 Feb 2012 19:49:38 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Tue, 7 Feb 2012, Alexander Lamaison wrote: Thanks a lot. I think we're doing good progress! > - should 'already' be caulculated later as the processing of leftovers > can change the offset it is based on It can be moved down a bit into the switch() since the variable is only used in the 'idle' state. If we make the leftover code return immediately (as the question/answer say) there won't be any need to calculate 'already' after it. I agree with your point that it would otherwise have to. > - why do we not return immediately when we've processed leftovers; as > Peter pointed out, we aren't allowed to anything that could access the > transport layer anyway in that case so why carry on? You mean in the leftover processing first in the idle case? Yes, that can probably return at once to make the code clearer. > - why does the second 'phase' set the next state as state_idle rather > than state_sent2 (not that it's actually used but it documents intent) It sets the state to idle to make sure it doesn't wrongly get stuck in the sent2 state. It sets the state2 only when an error (like EAGAIN) is received. > - is total_read guaranteed to be > 0 at the end of the function (where it > previously MOOed) No, it can also be zero in case all this function read was meta-data that wasn't actually payload and this function should be OK to have 0 returned for that case. > - why check total_read in the second phase while-loop? the loop doesn't > change it Ah, right. That can certainly be improved. I added that check just before the call that might get EAGAIN returned, but as you say - if total_read is non-zero at that point it was non-zero already before the loop and the check would be better placed already there. Will you do the additional edits? -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 8 01:16:07 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q180FhTo007110; Wed, 8 Feb 2012 01:16:03 +0100 Received: from mail-qw0-f54.google.com (mail-qw0-f54.google.com [209.85.216.54]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q180FeDg007055 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Wed, 8 Feb 2012 01:15:41 +0100 Received: by qaea17 with SMTP id a17so59800qae.20 for ; Tue, 07 Feb 2012 16:15:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; bh=YGIDuxFtXrL1r9suT7Ic9dgkeN2ZiKo3A1Y0T88PXJw=; b=cHlSrmoXGV6KcbEvf1gRUOhUg/JGmcqqfgvGH5SNLGGRBd8mslg49zYr7PuTyTFy5w 4tBUMrMSVnC53O9fORaHI5E3yi152NItnrzwwU/Eq8+aUWeF9seS1hTuFlT2jFX6swVX YU9glxL3xXbxrfTONPGm36m2txm01Q0ahVa4E= MIME-Version: 1.0 Received: by 10.224.180.76 with SMTP id bt12mr24651623qab.64.1328660135623; Tue, 07 Feb 2012 16:15:35 -0800 (PST) Received: by 10.229.144.211 with HTTP; Tue, 7 Feb 2012 16:15:35 -0800 (PST) In-Reply-To: References: Date: Wed, 8 Feb 2012 00:15:35 +0000 X-Google-Sender-Auth: ARShSdYoo9aZKVr8aTiceklVneU Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 7 February 2012 18:49, Daniel Stenberg wrote: > On Tue, 7 Feb 2012, Alexander Lamaison wrote: > > Will you do the additional edits? Sure. I hope today some time. Alex -- Swish - Easy SFTP for Windows Explorer (http://www.swish-sftp.org) _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 02:49:02 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q191fXEn004054; Thu, 9 Feb 2012 02:42:02 +0100 Received: from mail-qw0-f54.google.com (mail-qw0-f54.google.com [209.85.216.54]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q191fM1G004047 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Thu, 9 Feb 2012 02:41:23 +0100 Received: by qaea17 with SMTP id a17so892127qae.20 for ; Wed, 08 Feb 2012 17:41:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; bh=9nBiThIRkICF05/3cEKp4ABLInUsRcrg+JgoMyA3KAo=; b=gM55Q0Z7XUGL3HJVPhG8a8g5jCNj03qJa+frEUpyDRH82PwngnKHThSP+tMAaXzwoD IHiVQWm/EWd4Uk7pPhpZMVME/42LDF8jgL3CzcxVGJwQkvDhwRceY1Ki635iS8y9K2xI gAnbRNtMuUD98zAhKD+aHF/ZJVao3E11o5g8o= MIME-Version: 1.0 Received: by 10.224.106.196 with SMTP id y4mr49642qao.90.1328751677441; Wed, 08 Feb 2012 17:41:17 -0800 (PST) Received: by 10.229.144.211 with HTTP; Wed, 8 Feb 2012 17:41:17 -0800 (PST) In-Reply-To: References: Date: Thu, 9 Feb 2012 01:41:17 +0000 X-Google-Sender-Auth: up71BDYqPkyRnU4WnPhV8Y417Vo Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development Content-Type: multipart/mixed; boundary=20cf3074b440ba877504b87e1b1e X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se --20cf3074b440ba877504b87e1b1e Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 8 February 2012 00:15, Alexander Lamaison wrote: > On 7 February 2012 18:49, Daniel Stenberg wrote: >> On Tue, 7 Feb 2012, Alexander Lamaison wrote: >> >> Will you do the additional edits? > > Sure. =A0I hope today some time. Ok, here is the next patch; apply it on top of my other one. The changes are more extensive that I'd planned so I'd appreciate some careful review. Basically, the total_read variable turned out to be completely pointless. Once I'd fixed the leftovers processing so that it returned if there was any data, I couldn't work out how it could be anything other than 0 for most of it's lifetime. The only time it was incremented was just after we read data; a situation where we have to return without reading any more data. So I got rid of it. I'm still a little unsure of the code that deals with freeing/iterating chunks. Especially in the case where the read was short (short !=3D EOF). Especially especially in the case where the read was 0 (also 0 !=3D EOF). So could reviewing eyes pay that aspect particular attention. 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libssh2-devel-bounces@cool.haxx.se Thu Feb 9 12:15:48 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19BFUvW011314; Thu, 9 Feb 2012 12:15:45 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q19BFS4j011301 for ; Thu, 9 Feb 2012 12:15:28 +0100 Received: (qmail 27774 invoked by uid 501); 9 Feb 2012 11:15:28 -0000 Message-ID: <20120209111528.27773.qmail@stuge.se> Date: Thu, 9 Feb 2012 12:15:28 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Alexander Lamaison wrote: > The changes are more extensive that I'd planned so I'd appreciate some > careful review. Basically, the total_read variable turned out to be > completely pointless. Yes. What about the loop? It's kept for the chunk stuff, so that libssh2_sftp_read() never returns 0 bytes to the caller unless EOF? I think it would be nice to return EAGAIN if we read 0 bytes from transport. > @@ -1348,13 +1334,13 @@ static ssize_t sftp_read(LIBSSH2_SFTP_HANDLE * handle, char *buffer, > filep->offset_sent -= (chunk->len - rc32); > } > > - if(total_read + rc32 > buffer_size) { > + if(rc32 > buffer_size) { > /* figure out the overlap amount */ > - filep->data_left = (total_read + rc32) - buffer_size; > + filep->data_left = rc32 - buffer_size; Doesn't this lose the bytes that we received from transport but which do not fit into the buffer given to us by the user? > + /* remove the chunk we just processed keeping track of the > + * next one in case we need it */ > + next = _libssh2_list_next(&chunk->node); > + _libssh2_list_remove(&chunk->node); > + LIBSSH2_FREE(session, chunk); > + chunk = NULL; > + > + if(rc32 > 0) { > + /* we must return as we wrote some data to the buffer */ > + return rc32; > + } else { > + /* A zero-byte read is not necessarily EOF so we must not > + * return 0 (that would signal EOF to the caller) so > + * instead we carry on to the next chunk */ > + chunk = next; > } Here I suggest return EAGAIN instead of having the loop and chunk messyness. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 13:06:40 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19C6J9V019037; Thu, 9 Feb 2012 13:06:30 +0100 Received: from mail-qy0-f182.google.com (mail-qy0-f182.google.com [209.85.216.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19C6HFP018997 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Thu, 9 Feb 2012 13:06:18 +0100 Received: by qcmt40 with SMTP id t40so1097095qcm.41 for ; Thu, 09 Feb 2012 04:06:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type :content-transfer-encoding; bh=hCPWr/cOc2WHa7KJIRdNdOrTSpEtcUYcbAo7ngc93mI=; b=JfJfg61J9BZgytct3FkkZOgILjwGdE9mhZ0O3oL7j5+5jb7vSiZ2BdBWGufi8U4TBn Vfcs3+w5QtKpLzzDnmoutLeSlhbz54jgY7BkvU3L2mLbXjamltGw8LNCrLomVJJUlP0Q X0GJAqFCF74n3kZv9vwXRPuKuGfgkxrmKyFRk= MIME-Version: 1.0 Received: by 10.229.77.72 with SMTP id f8mr1070750qck.34.1328789173403; Thu, 09 Feb 2012 04:06:13 -0800 (PST) Received: by 10.229.144.211 with HTTP; Thu, 9 Feb 2012 04:06:13 -0800 (PST) In-Reply-To: <20120209111528.27773.qmail@stuge.se> References: <20120209111528.27773.qmail@stuge.se> Date: Thu, 9 Feb 2012 12:06:13 +0000 X-Google-Sender-Auth: PiOVnmCsfVr1h3rBjslolv8ZjPM Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q19C6HFP018997 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q19C6J9V019037 On 9 February 2012 11:15, Peter Stuge wrote: > Alexander Lamaison wrote: >> The changes are more extensive that I'd planned so I'd appreciate some >> careful review.  Basically, the total_read variable turned out to be >> completely pointless. > > Yes. What about the loop? It's kept for the chunk stuff, so that > libssh2_sftp_read() never returns 0 bytes to the caller unless EOF? Yes. Originally I got rid of the loop but then realised we might read 0. > I think it would be nice to return EAGAIN if we read 0 bytes from > transport. I like this idea. That would be cleaner and might remove the weird situation where we return 0 at the end of the function without it being EOF. >> @@ -1348,13 +1334,13 @@ static ssize_t sftp_read(LIBSSH2_SFTP_HANDLE * handle, char *buffer, >>                      filep->offset_sent -= (chunk->len - rc32); >>                  } >> >> -                if(total_read + rc32 > buffer_size) { >> +                if(rc32 > buffer_size) { >>                      /* figure out the overlap amount */ >> -                    filep->data_left = (total_read + rc32) - buffer_size; >> +                    filep->data_left = rc32 - buffer_size; > > Doesn't this lose the bytes that we received from transport but which > do not fit into the buffer given to us by the user? Not unless it did so before. total_read was always 0 at this point so the changes shouldn't make any difference. >> +                /* remove the chunk we just processed keeping track of the >> +                 * next one in case we need it */ >> +                next = _libssh2_list_next(&chunk->node); >> +                _libssh2_list_remove(&chunk->node); >> +                LIBSSH2_FREE(session, chunk); >> +                chunk = NULL; >> + >> +                if(rc32 > 0) { >> +                    /* we must return as we wrote some data to the buffer */ >> +                    return rc32; >> +                } else { >> +                    /* A zero-byte read is not necessarily EOF so we must not >> +                     * return 0 (that would signal EOF to the caller) so >> +                     * instead we carry on to the next chunk */ >> +                    chunk = next; >>                  } > > Here I suggest return EAGAIN instead of having the loop and chunk > messyness. I'll try this out tonight. Alex _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 13:28:01 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19CRjm7031327; Thu, 9 Feb 2012 13:27:59 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q19CRhuY031322 for ; Thu, 9 Feb 2012 13:27:43 +0100 Received: (qmail 1149 invoked by uid 501); 9 Feb 2012 12:27:43 -0000 Message-ID: <20120209122743.1148.qmail@stuge.se> Date: Thu, 9 Feb 2012 13:27:43 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: <20120209111528.27773.qmail@stuge.se> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q19CRjm7031327 Alexander Lamaison wrote: > >> @@ -1348,13 +1334,13 @@ static ssize_t sftp_read(LIBSSH2_SFTP_HANDLE * handle, char *buffer, > >>                      filep->offset_sent -= (chunk->len - rc32); > >>                  } > >> > >> -                if(total_read + rc32 > buffer_size) { > >> +                if(rc32 > buffer_size) { > >>                      /* figure out the overlap amount */ > >> -                    filep->data_left = (total_read + rc32) - buffer_size; > >> +                    filep->data_left = rc32 - buffer_size; > > > > Doesn't this lose the bytes that we received from transport but which > > do not fit into the buffer given to us by the user? > > Not unless it did so before. Sure. Look at the logic. data_left is being set to a smaller number of bytes than actually received from transport. Where do the remaining bytes go? > > suggest return EAGAIN instead of having the loop and chunk > > I'll try this out tonight. Cool. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 14:17:57 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19DHhos032648; Thu, 9 Feb 2012 14:17:54 +0100 Received: from mail-qy0-f182.google.com (mail-qy0-f182.google.com [209.85.216.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19DHfBM032623 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Thu, 9 Feb 2012 14:17:42 +0100 Received: by qcmt40 with SMTP id t40so1137559qcm.41 for ; Thu, 09 Feb 2012 05:17:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type :content-transfer-encoding; bh=+8XktyVjG0Tp4Fri7F6HX2h11WjLlO5VY3wvhJMoY2c=; b=W3ZVTE2ICkDbIusds5XESnSXUtHCZ/3oAUKPkWoKEEVs4CMFXByZsNYnSvhU+p71bv wkQN5CMhL115rvQA0cd0NQ9z2ErhTxV1117CbPsR9mE7ROOCAaDqLvJmTkuxproEI2sk F1zI6MmIU6GXsTUC4CXCphQaqzpfRT5K2rgTk= MIME-Version: 1.0 Received: by 10.229.78.159 with SMTP id l31mr1179423qck.114.1328793456996; Thu, 09 Feb 2012 05:17:36 -0800 (PST) Received: by 10.229.144.211 with HTTP; Thu, 9 Feb 2012 05:17:36 -0800 (PST) In-Reply-To: <20120209122743.1148.qmail@stuge.se> References: <20120209111528.27773.qmail@stuge.se> <20120209122743.1148.qmail@stuge.se> Date: Thu, 9 Feb 2012 13:17:36 +0000 X-Google-Sender-Auth: Xgy77tvYY_QRE2ecnsC6gIaKRq0 Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q19DHfBM032623 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q19DHhos032648 On 9 February 2012 12:27, Peter Stuge wrote: > Alexander Lamaison wrote: >> >> @@ -1348,13 +1334,13 @@ static ssize_t sftp_read(LIBSSH2_SFTP_HANDLE * handle, char *buffer, >> >>                      filep->offset_sent -= (chunk->len - rc32); >> >>                  } >> >> >> >> -                if(total_read + rc32 > buffer_size) { >> >> +                if(rc32 > buffer_size) { >> >>                      /* figure out the overlap amount */ >> >> -                    filep->data_left = (total_read + rc32) - buffer_size; >> >> +                    filep->data_left = rc32 - buffer_size; >> > >> > Doesn't this lose the bytes that we received from transport but which >> > do not fit into the buffer given to us by the user? >> >> Not unless it did so before. > > Sure. Look at the logic. data_left is being set to a smaller number > of bytes than actually received from transport. Where do the > remaining bytes go? Right. That's its purpose, isn't it? It stores how big the leftovers are. Why would that be >= the number of bytes received from the transport? Alex _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 14:38:24 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19DcBCO015899; Thu, 9 Feb 2012 14:38:23 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q19Dc9xW015885 for ; Thu, 9 Feb 2012 14:38:09 +0100 Received: (qmail 7274 invoked by uid 501); 9 Feb 2012 13:38:10 -0000 Message-ID: <20120209133810.7273.qmail@stuge.se> Date: Thu, 9 Feb 2012 14:38:10 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: <20120209111528.27773.qmail@stuge.se> <20120209122743.1148.qmail@stuge.se> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q19DcBCO015899 Alexander Lamaison wrote: > >> >> +                    filep->data_left = rc32 - buffer_size; > >> > > >> > Doesn't this lose the bytes that we received from transport but which > >> > do not fit into the buffer given to us by the user? > >> > >> Not unless it did so before. > > > > Sure. Look at the logic. data_left is being set to a smaller number > > of bytes than actually received from transport. Where do the > > remaining bytes go? > > Right. That's its purpose, isn't it? It stores how big the > leftovers are. Yes, you're of course right. Thanks for the patience. Looking forward to the patch without loop! (Is there a reason not to squash it together with your previous changes?) //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 14:43:21 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19DhHXi021998; Thu, 9 Feb 2012 14:43:21 +0100 Received: from mail-qy0-f182.google.com (mail-qy0-f182.google.com [209.85.216.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19DhEf8021944 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Thu, 9 Feb 2012 14:43:15 +0100 Received: by qcmt40 with SMTP id t40so1154335qcm.41 for ; Thu, 09 Feb 2012 05:43:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type :content-transfer-encoding; bh=/83rcSbagxfetZqrGQzeYU2vmoWNU1ZBHmfWO0wDCFc=; b=nRU+yH+F7CDbIfDWqGs0So4M5LkrfqdiHgaI9ROe/sVWwJMGJztiW26u1NDhQ82pOS zRtoB2HAT74YKkzmLLn0cOTcz5eRPgzYYQj/pL7222cNNsYXpoDVEFQWX16S5rjiOl9c duO52S1KoVj7o2fOaDiEM3EeZ4Vn/s6fsmHZo= MIME-Version: 1.0 Received: by 10.229.76.89 with SMTP id b25mr1262915qck.54.1328794990822; Thu, 09 Feb 2012 05:43:10 -0800 (PST) Received: by 10.229.144.211 with HTTP; Thu, 9 Feb 2012 05:43:10 -0800 (PST) In-Reply-To: <20120209133810.7273.qmail@stuge.se> References: <20120209111528.27773.qmail@stuge.se> <20120209122743.1148.qmail@stuge.se> <20120209133810.7273.qmail@stuge.se> Date: Thu, 9 Feb 2012 13:43:10 +0000 X-Google-Sender-Auth: Puys8VQMcuiF6OqWZmgS7HAZz4I Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q19DhEf8021944 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q19DhHXi021998 On 9 February 2012 13:38, Peter Stuge wrote: > Alexander Lamaison wrote: >> >> >> +                    filep->data_left = rc32 - buffer_size; >> >> > >> >> > Doesn't this lose the bytes that we received from transport but which >> >> > do not fit into the buffer given to us by the user? >> >> >> >> Not unless it did so before. >> > >> > Sure. Look at the logic. data_left is being set to a smaller number >> > of bytes than actually received from transport. Where do the >> > remaining bytes go? >> >> Right.  That's its purpose, isn't it?  It stores how big the >> leftovers are. > > Yes, you're of course right. Thanks for the patience. Looking forward > to the patch without loop! (Is there a reason not to squash it > together with your previous changes?) In two words, git bisect. The smaller the change, the more precisely we can attribute the blame should something go wrong. Alex _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 14:47:25 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19DlM3M024648; Thu, 9 Feb 2012 14:47:24 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q19DlLpo024631 for ; Thu, 9 Feb 2012 14:47:21 +0100 Received: (qmail 8090 invoked by uid 501); 9 Feb 2012 13:47:22 -0000 Message-ID: <20120209134722.8089.qmail@stuge.se> Date: Thu, 9 Feb 2012 14:47:22 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: <20120209111528.27773.qmail@stuge.se> <20120209122743.1148.qmail@stuge.se> <20120209133810.7273.qmail@stuge.se> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Alexander Lamaison wrote: > > Is there a reason not to squash it together with your previous changes? > > In two words, git bisect. It's still just one logical change, right? Fixing up the way sftp_read returns data? //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 14:49:14 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19Dn9r6025398; Thu, 9 Feb 2012 14:49:14 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19Dn7Cl025391 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Thu, 9 Feb 2012 14:49:07 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q19Dn7kC025387 for ; Thu, 9 Feb 2012 14:49:07 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Thu, 9 Feb 2012 14:49:07 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: <20120209111528.27773.qmail@stuge.se> Message-ID: References: <20120209111528.27773.qmail@stuge.se> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Thu, 9 Feb 2012, Peter Stuge wrote: > I think it would be nice to return EAGAIN if we read 0 bytes from transport. I don't. EAGAIN is only ever introduced in the transport layer when there's actually an EAGAIN from the socket layer. Introducing it elsewhere has always only introduced badness in the past and we've had to backpedal out from that several times. For example, EAGAIN implies that you need to call the same function again to make it "finish" what was previously started while 0 means that it wasn't abruptly stopped in the middle of something that needs to be continued but that other functions may very well be used. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 14:50:05 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19Do4iG026221; Thu, 9 Feb 2012 14:50:05 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19Do2PM026035 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Thu, 9 Feb 2012 14:50:02 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q19Do2jc025964 for ; Thu, 9 Feb 2012 14:50:02 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Thu, 9 Feb 2012 14:50:02 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: <20120209134722.8089.qmail@stuge.se> Message-ID: References: <20120209111528.27773.qmail@stuge.se> <20120209122743.1148.qmail@stuge.se> <20120209133810.7273.qmail@stuge.se> <20120209134722.8089.qmail@stuge.se> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Thu, 9 Feb 2012, Peter Stuge wrote: >> In two words, git bisect. > > It's still just one logical change, right? Fixing up the way sftp_read > returns data? They're iterations, so I think keeping them separate is fine as otherwise it'll be a rather huge single change that replaces pretty much the whole function at once. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 15:06:32 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19E6OEv005750; Thu, 9 Feb 2012 15:06:31 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q19E6MKH005741 for ; Thu, 9 Feb 2012 15:06:22 +0100 Received: (qmail 9607 invoked by uid 501); 9 Feb 2012 14:06:23 -0000 Message-ID: <20120209140623.9606.qmail@stuge.se> Date: Thu, 9 Feb 2012 15:06:23 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: <20120209111528.27773.qmail@stuge.se> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Daniel Stenberg wrote: >> I think it would be nice to return EAGAIN if we read 0 bytes from >> transport. > > I don't. EAGAIN is only ever introduced in the transport layer when > there's actually an EAGAIN from the socket layer. Introducing it > elsewhere has always only introduced badness in the past and we've > had to backpedal out from that several times. It seems to me that the semantics are correct in this case. > For example, EAGAIN implies that you need to call the same function > again to make it "finish" what was previously started while 0 means > that it wasn't abruptly stopped in the middle of something that > needs to be continued but that other functions may very well be > used. Except sftp_read() returning 0 means EOF, unlike for the channel functions. Just use EAGAIN and avoid recreating the complexity inside the SFTP layer when the above layer handles the case anyway. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 15:07:31 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19E7UEi006251; Thu, 9 Feb 2012 15:07:31 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q19E7TGU006227 for ; Thu, 9 Feb 2012 15:07:29 +0100 Received: (qmail 9733 invoked by uid 501); 9 Feb 2012 14:07:30 -0000 Message-ID: <20120209140730.9732.qmail@stuge.se> Date: Thu, 9 Feb 2012 15:07:30 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: <20120209111528.27773.qmail@stuge.se> <20120209122743.1148.qmail@stuge.se> <20120209133810.7273.qmail@stuge.se> <20120209134722.8089.qmail@stuge.se> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Daniel Stenberg wrote: >>> In two words, git bisect. >> >> It's still just one logical change, right? Fixing up the way sftp_read >> returns data? > > They're iterations, so I think keeping them separate is fine as otherwise > it'll be a rather huge single change that replaces pretty much the whole > function at once. Perfectly fine, and actually the only right way, when intermediate commits introduce code which is replaced by later ones. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 15:43:49 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19EhVqk000443; Thu, 9 Feb 2012 15:43:46 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19EhU0t000437 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Thu, 9 Feb 2012 15:43:30 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q19EhTsZ000433 for ; Thu, 9 Feb 2012 15:43:29 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Thu, 9 Feb 2012 15:43:29 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: <20120209140623.9606.qmail@stuge.se> Message-ID: References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Thu, 9 Feb 2012, Peter Stuge wrote: >> For example, EAGAIN implies that you need to call the same function >> again to make it "finish" what was previously started while 0 means >> that it wasn't abruptly stopped in the middle of something that >> needs to be continued but that other functions may very well be >> used. > > Except sftp_read() returning 0 means EOF, unlike for the channel functions. I'm not sure we're ready to make that promise in the API and statement in the documentation. I'd rather say that returning 0 might mean EOF. > Just use EAGAIN and avoid recreating the complexity inside the SFTP layer > when the above layer handles the case anyway. Sorry, I missed what simplicity you gain with EAGAIN instead of 0? As I read it (and I'm not 100% sure we're talking about the same code now), it would be the perfect example where EAGAIN would be wrong since there could possibly be data already drained from the socket and kept internally by libssh2 and EAGAIN would then wrongly lure the application to wait for the socket again while in reality there is data to handle already. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 15:48:05 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19Em31d003305; Thu, 9 Feb 2012 15:48:04 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19Em2YH003262 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Thu, 9 Feb 2012 15:48:02 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q19Em1Ke003216 for ; Thu, 9 Feb 2012 15:48:01 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Thu, 9 Feb 2012 15:48:01 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: Message-ID: References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Thu, 9 Feb 2012, Daniel Stenberg wrote: > I'm not sure we're ready to make that promise in the API and statement in > the documentation. I'd rather say that returning 0 might mean EOF. Or do we already say 0 means EOF? -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 9 16:00:27 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19F0JHA011217; Thu, 9 Feb 2012 16:00:27 +0100 Received: from mail0.avcosystems.co.uk (mail0.avcosystems.co.uk [195.224.236.86]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q19F0HLn011077 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 9 Feb 2012 16:00:17 +0100 Received: from lexx.avco ([192.168.0.1] helo=lyta) by mail0.avcosystems.co.uk with esmtp (Exim 4.69 #1 (Debian)) (envelope-from ) id 1RvVTa-0008AN-Ub for ; Thu, 09 Feb 2012 14:59:59 +0000 From: "Mark Smith" To: "'libssh2 development'" References: <20120209111528.27773.qmail@stuge.se><20120209140623.9606.qmail@stuge.se> Subject: RE: SFTP issues Date: Thu, 9 Feb 2012 15:00:14 -0000 Keywords: Not filed Message-ID: MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 thread-index: AcznOdILfAm3r77pR1m4XfukSiNWewAAPHyg In-Reply-To: X-AVCO-Scan-Signature: 3cdb0c1b4273759171d666cbec1fbf36 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Daniel Stenberg wrote: > Or do we already say 0 means EOF? The documentation on the website states that libssh2_sftp_read() is modelled on the POSIX read(2) function, which has always returned 0 to indicate EOF. My own code has always assumed this to be the case, which is why when I suddenly started getting zero returns when not EOF I was puzzled and assumed it to be a bug. If we had some other way to determine EOF for SFTP then I might accept that returning zero might not always mean EOF but there's no obvious function for determining EOF using any other means than returning zero out of libssh2_sftp_read() - I'm assuming that libssh2_channel_eof() cannot be used in this case. If this is as active a discussion as it seems, perhaps it could be more effectively explored using IRC? -- Mark _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 10 14:22:00 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1ADLZJk018833; Fri, 10 Feb 2012 14:21:54 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1ADLYll018769 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Fri, 10 Feb 2012 14:21:34 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q1ADLYwV018752 for ; Fri, 10 Feb 2012 14:21:34 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Fri, 10 Feb 2012 14:21:34 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: RE: SFTP issues In-Reply-To: Message-ID: References: <20120209111528.27773.qmail@stuge.se><20120209140623.9606.qmail@stuge.se> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Thu, 9 Feb 2012, Mark Smith wrote: >> Or do we already say 0 means EOF? > > The documentation on the website states that libssh2_sftp_read() is modelled > on the POSIX read(2) function, which has always returned 0 to indicate EOF. Sorry, I confused this function with another one when I stated that about the return code. Would anyone mind if I push these three commits now on master to easier allow us all to see the complete source and continue working on improving it? -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 10 16:23:29 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1AFN5Ds008435; Fri, 10 Feb 2012 16:23:26 +0100 Received: from mail-qy0-f182.google.com (mail-qy0-f182.google.com [209.85.216.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1AFN3iQ008241 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Fri, 10 Feb 2012 16:23:04 +0100 Received: by qcmt40 with SMTP id t40so2006707qcm.41 for ; Fri, 10 Feb 2012 07:22:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; bh=Sg2ztpjViJIRiVNaPHl/PwoexJECssK6xTyFiYoGUxM=; b=dOpT8mXNjoF8NiVr+JiyfZcArGdI3Y8pr9Ff1dwzfCw6XNBugH1878BscOxsQ+P9SP iU8+3uz0xnveYCEKk/xQAqux5bGXrwuQt+bAr5e3e0LFjgNASWTHptZXpekDYs+abt+F YwaHTHiFMTe2ILJA/SH8RLyJ3bK6DonosSUbc= MIME-Version: 1.0 Received: by 10.229.102.79 with SMTP id f15mr4453114qco.94.1328887379399; Fri, 10 Feb 2012 07:22:59 -0800 (PST) Received: by 10.229.144.211 with HTTP; Fri, 10 Feb 2012 07:22:59 -0800 (PST) In-Reply-To: References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> Date: Fri, 10 Feb 2012 15:22:59 +0000 X-Google-Sender-Auth: z_SAtNRyOccXHNsO9Di9HHKbjhg Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 10 February 2012 13:21, Daniel Stenberg wrote: > > Would anyone mind if I push these three commits now on master to easier > allow us all to see the complete source and continue working on improving > it? Not at all; I was going to suggest doing so. I tested them in my larger project last night and could read a 32MB image with no problem. Alex -- Swish - Easy SFTP for Windows Explorer (http://www.swish-sftp.org) _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sun Feb 12 22:09:33 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1CL95e6019640; Sun, 12 Feb 2012 22:09:27 +0100 Received: from mail-vx0-f182.google.com (mail-vx0-f182.google.com [209.85.220.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1CL935p019498 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Sun, 12 Feb 2012 22:09:04 +0100 Received: by vcmm1 with SMTP id m1so3952799vcm.41 for ; Sun, 12 Feb 2012 13:08:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:from:date:message-id:subject:to:content-type :content-transfer-encoding; bh=46m62B5zWrbTRUFqXY3tsZYHXGfJiEhL2MdRgJ0N2lQ=; b=FoLOH+ahceGXjHHFxgMhUYppmc5eQvdxJ1+z5FVeUFkOd7DItLnGYSnDTv7GE/YmGx +1F8mmKz7Jp3xzOtzGp5Q3Hg0KDhc2ZtZK0ubyX5ve6XIUa90IHYaCde7AM/RgscdIYT A0OSGRnU+aa9dI/xcpxj0Tg7NnvqWipLslU7Y= Received: by 10.220.39.67 with SMTP id f3mr7134246vce.46.1329080939244; Sun, 12 Feb 2012 13:08:59 -0800 (PST) MIME-Version: 1.0 Received: by 10.52.187.1 with HTTP; Sun, 12 Feb 2012 13:08:39 -0800 (PST) From: Luis Lavena Date: Sun, 12 Feb 2012 18:08:39 -0300 Message-ID: Subject: Windows: failed to build X11 example To: libssh2 development X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q1CL935p019498 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q1CL95e6019640 Hello, I encountered the following error when trying to build libssh2 1.4.0 on Windows: https://gist.github.com/6a234cd94c1ceb0ac7c8 GCC used was 4.6.2, OpenSSL was 1.0.0g and Zlib was 1.2.6 The culprit seems to be the attempt to compile X11 sample when Windows do not provide X11 headers or support for it (at least not directly) Wouldn't be better if X11 presence is detected at configure time and x11 example excluded from compilation if not possible to build it? Thank you. -- Luis Lavena AREA 17 - Perfection in design is achieved not when there is nothing more to add, but rather when there is nothing more to take away. Antoine de Saint-Exupéry _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sun Feb 12 23:36:30 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1CMaCto005147; Sun, 12 Feb 2012 23:36:28 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1CMaBkZ005130 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Sun, 12 Feb 2012 23:36:11 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q1CMaBac005125 for ; Sun, 12 Feb 2012 23:36:11 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Sun, 12 Feb 2012 23:36:11 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: Windows: failed to build X11 example In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Sun, 12 Feb 2012, Luis Lavena wrote: > The culprit seems to be the attempt to compile X11 sample when Windows do > not provide X11 headers or support for it (at least not directly) Which headers would that be? > Wouldn't be better if X11 presence is detected at configure time and x11 > example excluded from compilation if not possible to build it? Probably, yes, if there's no other way to fix the problem. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Mon Feb 13 00:12:45 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1CNCYRC032331; Mon, 13 Feb 2012 00:12:43 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1CNCX7u032314 for ; Mon, 13 Feb 2012 00:12:33 +0100 Received: (qmail 17077 invoked by uid 501); 12 Feb 2012 23:12:34 -0000 Message-ID: <20120212231234.17076.qmail@stuge.se> Date: Mon, 13 Feb 2012 00:12:34 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: Windows: failed to build X11 example Mail-Followup-To: libssh2-devel@cool.haxx.se References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Daniel Stenberg wrote: >> The culprit seems to be the attempt to compile X11 sample when Windows do >> not provide X11 headers or support for it (at least not directly) > > Which headers would that be? The example e.g. does: sock = socket(AF_UNIX, SOCK_STREAM, 0); I'd suggest to use automake.. We'll need a new AM_CONDITIONAL in configure.ac //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Mon Feb 13 00:45:57 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1CNjgk5022713; Mon, 13 Feb 2012 00:45:56 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1CNjfMj022700 for ; Mon, 13 Feb 2012 00:45:41 +0100 Received: (qmail 19461 invoked by uid 501); 12 Feb 2012 23:45:41 -0000 Message-ID: <20120212234541.19460.qmail@stuge.se> Date: Mon, 13 Feb 2012 00:45:41 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: Windows: failed to build X11 example Mail-Followup-To: libssh2-devel@cool.haxx.se References: MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="mSxgbZZZvrAyzONB" Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se --mSxgbZZZvrAyzONB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Luis Lavena wrote: > Wouldn't be better if X11 presence is detected at configure time and > x11 example excluded from compilation if not possible to build it? The attached patch works for me when cross-compiling for MinGW, in that it excludes the x11 example. Try it out. Comments welcome. //Peter --mSxgbZZZvrAyzONB Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="0001-example-x11-Build-only-when-sys-un.h-is-found-by-con.patch" From 4774d500e724bc4e548f743a0cb644ab05599474 Mon Sep 17 00:00:00 2001 From: Peter Stuge Date: Mon, 13 Feb 2012 00:34:27 +0100 Subject: [PATCH] example/x11: Build only when sys/un.h is found by configure The example can't be built on systems without AF_UNIX sockets. --- configure.ac | 3 ++- example/Makefile.am | 6 +++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/configure.ac b/configure.ac index 5f94099..6ab89e8 100644 --- a/configure.ac +++ b/configure.ac @@ -220,7 +220,8 @@ AC_HELP_STRING([--disable-hidden-symbols],[Leave all symbols with default visibi AC_CHECK_HEADERS([errno.h fcntl.h stdio.h stdlib.h unistd.h sys/uio.h]) AC_CHECK_HEADERS([sys/select.h sys/socket.h sys/ioctl.h sys/time.h]) AC_CHECK_HEADERS([arpa/inet.h netinet/in.h]) -AC_CHECK_HEADERS([sys/un.h]) +AC_CHECK_HEADERS([sys/un.h], [have_sys_un_h=yes], [have_sys_un_h=no]) +AM_CONDITIONAL([HAVE_SYS_UN_H], test "x$have_sys_un_h" = xyes) case $host in *-*-cygwin* | *-*-cegcc*) diff --git a/example/Makefile.am b/example/Makefile.am index 26cbf8a..8c6636f 100644 --- a/example/Makefile.am +++ b/example/Makefile.am @@ -7,7 +7,11 @@ noinst_PROGRAMS = direct_tcpip ssh2 scp scp_nonblock scp_write \ scp_write_nonblock sftp sftp_nonblock sftp_write sftp_write_nonblock \ sftp_mkdir sftp_mkdir_nonblock sftp_RW_nonblock sftp_write_sliding \ sftpdir sftpdir_nonblock ssh2_exec ssh2_agent ssh2_echo sftp_append \ - subsystem_netconf tcpip-forward x11 + subsystem_netconf tcpip-forward + +if HAVE_SYS_UN_H +noinst_PROGRAMS += x11 +endif AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/example LDADD = $(top_builddir)/src/libssh2.la -- 1.7.4.1.343.ga91df.dirty --mSxgbZZZvrAyzONB Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel --mSxgbZZZvrAyzONB-- From libssh2-devel-bounces@cool.haxx.se Mon Feb 13 01:53:50 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1D0rVWu011330; Mon, 13 Feb 2012 01:53:48 +0100 Received: from mail-vx0-f182.google.com (mail-vx0-f182.google.com [209.85.220.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1D0rS27011281 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Mon, 13 Feb 2012 01:53:29 +0100 Received: by vcmm1 with SMTP id m1so4035097vcm.41 for ; Sun, 12 Feb 2012 16:53:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type:content-transfer-encoding; bh=6yPnx/nqqFtyVysPBgIDk8uo7cX2s+aGN198PV/a8ss=; b=lO5OhFBEFM93lLOqWNmWMrFpnlyLp0AQz+66itX2QGawITl18WoQwukP1ry1vTr+28 1AAu7qPfkOrq3SB8+W7xj94WjRvR0FVh5goIVSJRPoR2S9lSwAaY1wEXentwdluxVQmd JKW/ZVxdnOquv5nPP6HEjjD99yVdstrhp/y2I= Received: by 10.220.108.138 with SMTP id f10mr7336100vcp.16.1329094405267; Sun, 12 Feb 2012 16:53:25 -0800 (PST) MIME-Version: 1.0 Received: by 10.52.187.1 with HTTP; Sun, 12 Feb 2012 16:53:05 -0800 (PST) In-Reply-To: <20120212234541.19460.qmail@stuge.se> References: <20120212234541.19460.qmail@stuge.se> From: Luis Lavena Date: Sun, 12 Feb 2012 21:53:05 -0300 Message-ID: Subject: Re: Windows: failed to build X11 example To: libssh2 development X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q1D0rS27011281 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q1D0rVWu011330 On Sun, Feb 12, 2012 at 8:45 PM, Peter Stuge wrote: > Luis Lavena wrote: >> Wouldn't be better if X11 presence is detected at configure time and >> x11 example excluded from compilation if not possible to build it? > > The attached patch works for me when cross-compiling for MinGW, in > that it excludes the x11 example. Try it out. Comments welcome. > > Thank you, that patch also worked native for MinGW. `make` completed without issue. Cheers, -- Luis Lavena AREA 17 - Perfection in design is achieved not when there is nothing more to add, but rather when there is nothing more to take away. Antoine de Saint-Exupéry _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Mon Feb 13 02:19:46 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1D1Jb0c026834; Mon, 13 Feb 2012 02:19:45 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1D1JZUP026825 for ; Mon, 13 Feb 2012 02:19:35 +0100 Received: (qmail 26395 invoked by uid 501); 13 Feb 2012 01:19:37 -0000 Message-ID: <20120213011937.26394.qmail@stuge.se> Date: Mon, 13 Feb 2012 02:19:37 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: Windows: failed to build X11 example Mail-Followup-To: libssh2-devel@cool.haxx.se References: <20120212234541.19460.qmail@stuge.se> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Luis Lavena wrote: > >> Wouldn't be better if X11 presence is detected at configure time and > >> x11 example excluded from compilation if not possible to build it? > > > > The attached patch works for me when cross-compiling for MinGW, in > > that it excludes the x11 example. Try it out. Comments welcome. > > Thank you, that patch also worked native for MinGW. > > `make` completed without issue. Pushed. Thanks for testing. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Mon Feb 13 16:40:52 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1DFeTS8004497; Mon, 13 Feb 2012 16:40:49 +0100 Received: from earth.stuge.se (earth.stuge.se [212.116.89.126]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1DFeRsM004477 for ; Mon, 13 Feb 2012 16:40:28 +0100 Received: (qmail 1525 invoked from network); 13 Feb 2012 15:40:27 -0000 Received: from unknown (HELO earth.stuge.se) (127.0.0.1) by localhost with SMTP; 13 Feb 2012 15:40:27 -0000 MIME-Version: 1.0 From: "libssh2 Trac" X-Trac-Version: 0.12.3dev Precedence: bulk Cc: libssh2-devel@cool.haxx.se Auto-Submitted: auto-generated X-Mailer: Trac 0.12.3dev, by Edgewall Software X-Trac-Project: libssh2 Date: Mon, 13 Feb 2012 15:40:27 -0000 X-URL: http://trac.libssh2.org/ Subject: Re: [libssh2] #233: libssh2 _libssh2_packet_add() in packet.c not responding properly to SSH_MSG_CHANNEL_REQUEST for openssh keepalive X-Trac-Ticket-URL: http://trac.libssh2.org/ticket/233#comment:1 Message-ID: <059.a21c46ea797331703639d86699195b85@libssh2.stuge.se> References: <044.66311e4933791f7566e3c1ea80fa5175@libssh2.stuge.se> X-Trac-Ticket-ID: 233 In-Reply-To: <044.66311e4933791f7566e3c1ea80fa5175@libssh2.stuge.se> X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q1DFeRsM004477 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Reply-To: trac@libssh2.stuge.se, libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se #233: libssh2 _libssh2_packet_add() in packet.c not responding properly to SSH_MSG_CHANNEL_REQUEST for openssh keepalive -----------------------+------------------- Reporter: engstrom | Owner: Type: defect | Status: new Priority: normal | Milestone: 1.4.0 Component: protocol | Version: 1.3.0 Resolution: | Keywords: Blocked By: | Blocks: -----------------------+------------------- Comment (by engstrom): Is anybody looking at this ticket? Did I open it in the right Component? -- Ticket URL: libssh2 C library for writing portable SSH2 clients _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Mon Feb 13 20:04:01 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1DJ3hYJ029137; Mon, 13 Feb 2012 20:03:58 +0100 Received: from earth.stuge.se (earth.stuge.se [212.116.89.126]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1DJ3eha029109 for ; Mon, 13 Feb 2012 20:03:40 +0100 Received: (qmail 26408 invoked from network); 13 Feb 2012 19:03:41 -0000 Received: from unknown (HELO earth.stuge.se) (127.0.0.1) by localhost with SMTP; 13 Feb 2012 19:03:41 -0000 MIME-Version: 1.0 From: "libssh2 Trac" X-Trac-Version: 0.12.3dev Precedence: bulk Cc: libssh2-devel@cool.haxx.se Auto-Submitted: auto-generated X-Mailer: Trac 0.12.3dev, by Edgewall Software X-Trac-Project: libssh2 Date: Mon, 13 Feb 2012 19:03:40 -0000 X-URL: http://trac.libssh2.org/ Subject: Re: [libssh2] #233: libssh2 _libssh2_packet_add() in packet.c not responding properly to SSH_MSG_CHANNEL_REQUEST for openssh keepalive X-Trac-Ticket-URL: http://trac.libssh2.org/ticket/233#comment:2 Message-ID: <059.5a8d820479c8316d152d3e8b0bd40262@libssh2.stuge.se> References: <044.66311e4933791f7566e3c1ea80fa5175@libssh2.stuge.se> X-Trac-Ticket-ID: 233 In-Reply-To: <044.66311e4933791f7566e3c1ea80fa5175@libssh2.stuge.se> X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q1DJ3eha029109 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Reply-To: trac@libssh2.stuge.se, libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se #233: libssh2 _libssh2_packet_add() in packet.c not responding properly to SSH_MSG_CHANNEL_REQUEST for openssh keepalive -----------------------+------------------- Reporter: engstrom | Owner: Type: defect | Status: new Priority: normal | Milestone: 1.4.0 Component: protocol | Version: 1.3.0 Resolution: | Keywords: Blocked By: | Blocks: -----------------------+------------------- Comment (by bagder): It seems to be correctly filed, I think that quite simply nobody has looked at it. -- Ticket URL: libssh2 C library for writing portable SSH2 clients _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Mon Feb 13 20:54:59 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1DJskYo008150; Mon, 13 Feb 2012 20:54:57 +0100 Received: from earth.stuge.se (earth.stuge.se [212.116.89.126]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1DJsiXX008093 for ; Mon, 13 Feb 2012 20:54:44 +0100 Received: (qmail 5329 invoked from network); 13 Feb 2012 19:54:42 -0000 Received: from unknown (HELO earth.stuge.se) (127.0.0.1) by localhost with SMTP; 13 Feb 2012 19:54:42 -0000 MIME-Version: 1.0 From: "libssh2 Trac" X-Trac-Version: 0.12.3dev Precedence: bulk Cc: libssh2-devel@cool.haxx.se Auto-Submitted: auto-generated X-Mailer: Trac 0.12.3dev, by Edgewall Software X-Trac-Project: libssh2 Date: Mon, 13 Feb 2012 19:54:42 -0000 X-URL: http://trac.libssh2.org/ Subject: Re: [libssh2] #233: libssh2 _libssh2_packet_add() in packet.c not responding properly to SSH_MSG_CHANNEL_REQUEST for openssh keepalive X-Trac-Ticket-URL: http://trac.libssh2.org/ticket/233#comment:3 Message-ID: <059.d74619e599986fe70e92259d390aa262@libssh2.stuge.se> References: <044.66311e4933791f7566e3c1ea80fa5175@libssh2.stuge.se> X-Trac-Ticket-ID: 233 In-Reply-To: <044.66311e4933791f7566e3c1ea80fa5175@libssh2.stuge.se> X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q1DJsiXX008093 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Reply-To: trac@libssh2.stuge.se, libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se #233: libssh2 _libssh2_packet_add() in packet.c not responding properly to SSH_MSG_CHANNEL_REQUEST for openssh keepalive -----------------------+------------------- Reporter: engstrom | Owner: Type: defect | Status: new Priority: normal | Milestone: 1.4.0 Component: protocol | Version: 1.3.0 Resolution: | Keywords: Blocked By: | Blocks: -----------------------+------------------- Comment (by engstrom): Thanks badger, I appreciate the response. -- Ticket URL: libssh2 C library for writing portable SSH2 clients _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 17 16:16:17 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1HFFmVW004682; Fri, 17 Feb 2012 16:16:13 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1HFFlxC004665 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Fri, 17 Feb 2012 16:15:47 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q1HFFl8C004660 for ; Fri, 17 Feb 2012 16:15:47 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Fri, 17 Feb 2012 16:15:47 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: sftp_write and EAGAIN Message-ID: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="1129329158-1781119183-1329491747=:19391" X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --1129329158-1781119183-1329491747=:19391 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII Hi friends, As I promised earlier, here is my take at doing the same fix to sftp_write as we've worked on for sftp_read. 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[209.85.210.54]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1J1s4Fi010829 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Sun, 19 Feb 2012 02:54:05 +0100 Received: by daec6 with SMTP id c6so5114314dae.41 for ; Sat, 18 Feb 2012 17:54:00 -0800 (PST) Received-SPF: pass (google.com: domain of alexander.lamaison@gmail.com designates 10.68.130.40 as permitted sender) client-ip=10.68.130.40; Authentication-Results: mr.google.com; spf=pass (google.com: domain of alexander.lamaison@gmail.com designates 10.68.130.40 as permitted sender) smtp.mail=alexander.lamaison@gmail.com; dkim=pass header.i=alexander.lamaison@gmail.com Received: from mr.google.com ([10.68.130.40]) by 10.68.130.40 with SMTP id ob8mr46399686pbb.106.1329616440326 (num_hops = 1); Sat, 18 Feb 2012 17:54:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; bh=z916C+mwJRloMEabkGPAiu8u/GBbWzWr+6Lby1MgGeU=; b=m3Y5DAb5hrdAjQJLA7TwTzSpvvHB2gCOEJaxgfUOy9alJ0/4P0G9u1FOydnTeFC47C FhXhwvwbj1eOWo4srNviU7gsT8Q70Kbe6D0RLYmuUvWSvAuASU7yvwZ4c9M11Ap2pUCQ 9pN3A21gkRvVSOXKUKaMx7SsuOULSE/3Ebo3I= MIME-Version: 1.0 Received: by 10.68.130.40 with SMTP id ob8mr38020291pbb.106.1329616440283; Sat, 18 Feb 2012 17:54:00 -0800 (PST) Received: by 10.143.97.8 with HTTP; Sat, 18 Feb 2012 17:54:00 -0800 (PST) In-Reply-To: References: Date: Sun, 19 Feb 2012 01:54:00 +0000 X-Google-Sender-Auth: 99wX5y5k0EnUZondT2kQdLRaqUk Message-ID: Subject: Re: sftp_write and EAGAIN From: Alexander Lamaison To: libssh2 development X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 17 February 2012 15:15, Daniel Stenberg wrote: > Hi friends, > > As I promised earlier, here is my take at doing the same fix to sftp_write > as we've worked on for sftp_read. > > I'll appreciate eyeballs and testing! It looks OK to me and passes my test suite. One thing: why do we need that final while-loop? Are we keeping that around (as with sftp_read) solely for the case where nothing was acked? When would that happen? Can chunk->len ever be zero? Is this worth keeping the loop around for; unlike sftp_read, we can return 0 without it signalling completion? Also, why do we increment acked? I can't see any execution of the loop that could have acked as anything other than zero at the point it is incremented. Alex -- Swish - Easy SFTP for Windows Explorer (http://www.swish-sftp.org) _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sun Feb 19 12:15:39 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1JBFC39029684; Sun, 19 Feb 2012 12:15:35 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1JBF9hs029638 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Sun, 19 Feb 2012 12:15:09 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q1JBF9vF029633 for ; Sun, 19 Feb 2012 12:15:09 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Sun, 19 Feb 2012 12:15:09 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: sftp_write and EAGAIN In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Sun, 19 Feb 2012, Alexander Lamaison wrote: > It looks OK to me and passes my test suite. Great. It did pass my tests too but they are very simple. I'll push this now. Regarding your questions about the logic, I decided I wanted to make the tiniest possible change to the logic and just fix the EAGAIN/data flaw. Your points are valid and could indeed be adressed but I'll prefer to do them separately. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sun Feb 19 12:26:36 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1JBQTcq006451; Sun, 19 Feb 2012 12:26:36 +0100 Received: from mail-qw0-f54.google.com (mail-qw0-f54.google.com [209.85.216.54]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1JBQRbN006414 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Sun, 19 Feb 2012 12:26:28 +0100 Received: by qaea17 with SMTP id a17so5468117qae.20 for ; Sun, 19 Feb 2012 03:26:22 -0800 (PST) Received-SPF: pass (google.com: domain of alexander.lamaison@gmail.com designates 10.229.77.72 as permitted sender) client-ip=10.229.77.72; Authentication-Results: mr.google.com; spf=pass (google.com: domain of alexander.lamaison@gmail.com designates 10.229.77.72 as permitted sender) smtp.mail=alexander.lamaison@gmail.com; dkim=pass header.i=alexander.lamaison@gmail.com Received: from mr.google.com ([10.229.77.72]) by 10.229.77.72 with SMTP id f8mr12039923qck.34.1329650782950 (num_hops = 1); Sun, 19 Feb 2012 03:26:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; bh=oKWciH/O1PgWHBfK5bmOqNqvxuCMkv5I5AWFv8afYRQ=; b=uoAJx0bDDIQysGWGJX04z14I8L2K6mpkaw+XVXNXLs1MyD3cnUps4g9DZXTiOS9tyF rgodvs68pcMkB5EMXsmHarexxP8qlEl+5dGCK69h91UitB+ZrRhVB0gDmy0LtDUZpsNr IYnyYk5AL3gxmEnRyBu76ShOBf+fulyBkl27k= MIME-Version: 1.0 Received: by 10.229.77.72 with SMTP id f8mr10197425qck.34.1329650782878; Sun, 19 Feb 2012 03:26:22 -0800 (PST) Received: by 10.229.144.211 with HTTP; Sun, 19 Feb 2012 03:26:22 -0800 (PST) In-Reply-To: References: Date: Sun, 19 Feb 2012 11:26:22 +0000 X-Google-Sender-Auth: 7ZA--Rd9BXrZj25QpPEHWgIOBdg Message-ID: Subject: Re: sftp_write and EAGAIN From: Alexander Lamaison To: libssh2 development X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 19 February 2012 11:15, Daniel Stenberg wrote: > On Sun, 19 Feb 2012, Alexander Lamaison wrote: > > Regarding your questions about the logic, I decided I wanted to make the > tiniest possible change to the logic and just fix the EAGAIN/data flaw. Your > points are valid and could indeed be adressed but I'll prefer to do them > separately. That's fine. I'm a fan of small patches. Alex _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 22 11:28:01 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1MARVmC010472; Wed, 22 Feb 2012 11:27:56 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1MARTfb010446 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Wed, 22 Feb 2012 11:27:29 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q1MARSx0010442 for ; Wed, 22 Feb 2012 11:27:28 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Wed, 22 Feb 2012 11:27:28 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: a patch release Message-ID: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Hi! The gcrypt fix and the SFTP fixes warrant a little patch release I think. I will therefor package and upload one within a couple of days unless someone has a good reason! -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 23 17:17:40 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NGHCZT001713; Thu, 23 Feb 2012 17:17:36 +0100 Received: from thor.int.qindel.com (smtp.qindel.com [62.97.67.18]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NGH9If001671 for ; Thu, 23 Feb 2012 17:17:09 +0100 Received: from localhost (localhost [127.0.0.1]) by thor.int.qindel.com (Postfix) with ESMTP id D8ECA1A88D for ; Thu, 23 Feb 2012 17:13:18 +0100 (CET) X-Virus-Scanned: amavisd-new at X-Spam-Flag: NO X-Spam-Score: -1.973 X-Spam-Level: X-Spam-Status: No, score=-1.973 tagged_above=-10 required=6.6 tests=[ALL_TRUSTED=-1.8, AWL=0.129, BAYES_00=-2.599, FORGED_YAHOO_RCVD=2.297] autolearn=no Received: from thor.int.qindel.com ([127.0.0.1]) by localhost (thor.int.qindel.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qGtvmBAW16IV for ; Thu, 23 Feb 2012 17:13:18 +0100 (CET) Received: by thor.int.qindel.com (Postfix, from userid 106) id 7614E1A884; Thu, 23 Feb 2012 17:13:18 +0100 (CET) Received: from [172.26.9.189] (unknown [172.26.9.189]) by thor.int.qindel.com (Postfix) with ESMTPSA id 630EB1A852 for ; Thu, 23 Feb 2012 17:13:18 +0100 (CET) Message-ID: <4F466680.9040605@yahoo.com> Date: Thu, 23 Feb 2012 17:17:04 +0100 From: Salvador Fandino User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120217 Thunderbird/11.0 MIME-Version: 1.0 To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> In-Reply-To: X-Copyrighted-Material: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se [I already sent this mail through gmane yesterday, but it never made into the list, so I am resending it directly] On 02/10/2012 04:22 PM, Alexander Lamaison wrote: > On 10 February 2012 13:21, Daniel Stenberg wrote: >> >> Would anyone mind if I push these three commits now on master to easier >> allow us all to see the complete source and continue working on improving >> it? > > Not at all; I was going to suggest doing so. I tested them in my > larger project last night and could read a 32MB image with no problem. 32MB is very short... Let me explain: I am the author of the Perl module Net::SFTP::Foreign, a full implementation of the SFTP protocol v3 in Perl. This module has support for several backends, and one of them use Net::SSH2, the Perl wrapper for libssh2. I have been testing my module with libssh2 1.4.0 and found that put transfers always stall after reading around 262130 +-10 from the channel (note that my module does not use the SFTP functionality from libssh2, it just connects to the remote server, creates a new channel and then writes and reads from it). After seeing this thread I got the source from git, hoping that my problem would have being also solved, but is hasn't. My intention was to investigate this bug further removing all the perl layers in order to send you a proper bug report, but as you are already working in a similar problem, I thought it would be better to let you know about my problem now. Actually, I got into testing 1.4.0 because one of the users of Net::SFTP::Foreign reported it has problems when his transfers go over 1.5GB using Net::SSH2 compiled against libssh2 1.2.8. _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 23 17:28:28 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NGSK8l009257; Thu, 23 Feb 2012 17:28:27 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1NGSI8V009229 for ; Thu, 23 Feb 2012 17:28:18 +0100 Received: (qmail 20415 invoked by uid 501); 23 Feb 2012 16:28:20 -0000 Message-ID: <20120223162820.20414.qmail@stuge.se> Date: Thu, 23 Feb 2012 17:28:20 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues Mail-Followup-To: libssh2-devel@cool.haxx.se References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> <4F466680.9040605@yahoo.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4F466680.9040605@yahoo.com> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Salvador Fandino wrote: > problems when his transfers go over > 1.5GB using Net::SSH2 compiled against libssh2 1.2.8. You have to send more information. "It doesn't work" is impossible to act on. Send logs. Send packet dumps. Actually with libssh2 they are one and the same. It's impossible to help without any information. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 23 18:34:54 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NHYZJ3023502; Thu, 23 Feb 2012 18:34:52 +0100 Received: from plane.gmane.org (plane.gmane.org [80.91.229.3]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NHYXN8023487 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 23 Feb 2012 18:34:33 +0100 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1S0cYs-00013T-KB for libssh2-devel@cool.haxx.se; Thu, 23 Feb 2012 18:34:34 +0100 Received: from 95.61.119.171 ([95.61.119.171]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 23 Feb 2012 18:34:34 +0100 Received: from sfandino by 95.61.119.171 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 23 Feb 2012 18:34:34 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: libssh2-devel@cool.haxx.se From: Salvador Fandino Subject: Re: SFTP issues Date: Thu, 23 Feb 2012 18:34:23 +0100 Lines: 22 Message-ID: References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> <4F466680.9040605@yahoo.com> <20120223162820.20414.qmail@stuge.se> Mime-Version: 1.0 X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: 95.61.119.171 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120217 Thunderbird/11.0 In-Reply-To: <20120223162820.20414.qmail@stuge.se> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 02/23/2012 05:28 PM, Peter Stuge wrote: > Salvador Fandino wrote: >> problems when his transfers go over >> 1.5GB using Net::SSH2 compiled against libssh2 1.2.8. > > You have to send more information. "It doesn't work" is impossible to > act on. Send logs. Send packet dumps. Actually with libssh2 they are > one and the same. > > It's impossible to help without any information. Did you read the part where I said I am planning to write a proper bug report? Just that it is going to take me some time to get rid of the Perl layer. All that I am suggesting is that, while you are working on a similar problem, you use bigger files for testing. In any case, if you don't mind the Perl layer, I can send a full description of how to reproduce the problem. _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 23 19:35:13 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NIYq6C031962; Thu, 23 Feb 2012 19:35:11 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NIYov5031947 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Thu, 23 Feb 2012 19:34:50 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q1NIYo6O031943 for ; Thu, 23 Feb 2012 19:34:50 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Thu, 23 Feb 2012 19:34:50 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: Message-ID: References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> <4F466680.9040605@yahoo.com> <20120223162820.20414.qmail@stuge.se> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Thu, 23 Feb 2012, Salvador Fandino wrote: > All that I am suggesting is that, while you are working on a similar > problem, you use bigger files for testing. I regularly test both SCP and SFTP with my 1GB test files with no problems. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 23 19:50:55 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NIonUh013880; Thu, 23 Feb 2012 19:50:54 +0100 Received: from mail-qw0-f47.google.com (mail-qw0-f47.google.com [209.85.216.47]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NIolVE013842 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Thu, 23 Feb 2012 19:50:48 +0100 Received: by qadz30 with SMTP id z30so7525734qad.20 for ; Thu, 23 Feb 2012 10:50:43 -0800 (PST) Received-SPF: pass (google.com: domain of alexander.lamaison@gmail.com designates 10.229.135.80 as permitted sender) client-ip=10.229.135.80; Authentication-Results: mr.google.com; spf=pass (google.com: domain of alexander.lamaison@gmail.com designates 10.229.135.80 as permitted sender) smtp.mail=alexander.lamaison@gmail.com; dkim=pass header.i=alexander.lamaison@gmail.com Received: from mr.google.com ([10.229.135.80]) by 10.229.135.80 with SMTP id m16mr1766664qct.134.1330023043675 (num_hops = 1); Thu, 23 Feb 2012 10:50:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type :content-transfer-encoding; bh=qcVR3VIIXdvFZTwP+y+7RFhRgiF9ukaY3zm1qA05HD4=; b=p4a3kKQVcqgwK4MW0RJi8S2Qb9eIosCfqbyjh1fdp/6m9AdddyjMHEWnPDdrAxm4Tr rYfhXEV6X6Ry74onTVeWWbNBK/3MQybslXUEFI4dYJ1GbAI7FcHKVTBWJnkZr6I7d7wj rl7+1r9vnY/+dmts0ydJa1ICTMQGWKXEqwe6A= MIME-Version: 1.0 Received: by 10.229.135.80 with SMTP id m16mr1517192qct.134.1330023043556; Thu, 23 Feb 2012 10:50:43 -0800 (PST) Received: by 10.229.144.211 with HTTP; Thu, 23 Feb 2012 10:50:43 -0800 (PST) In-Reply-To: <4F466680.9040605@yahoo.com> References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> <4F466680.9040605@yahoo.com> Date: Thu, 23 Feb 2012 18:50:43 +0000 X-Google-Sender-Auth: WgZ9fAAu48Y-SjIIO7T3vRDwsKM Message-ID: Subject: Re: SFTP issues From: Alexander Lamaison To: libssh2 development X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q1NIolVE013842 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q1NIonUh013880 On 22 February 2012 22:55, Salvador Fandiño wrote: > I have been testing my module with libssh2 1.4.0 and found that put > transfers always stall after reading around 262130 +-10 from the channel > (note that my module does not use the SFTP functionality from libssh2, it > just connects to the remote server, creates a new channel and then writes > and reads from it). > > After seeing this thread I got the source from git, hoping that my problem > would have being also solved, but is hasn't. ... > I think it would be a good idea to test the patch with bigger transfers > before making a new release. You say you don't use libssh2's SFTP implementation so the changes introduced by the patch don't apply to your problem. They only change sftp.c. Alex -- Swish - Easy SFTP for Windows Explorer (http://www.swish-sftp.org) _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 23 20:53:20 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NJqwSO029731; Thu, 23 Feb 2012 20:53:17 +0100 Received: from plane.gmane.org (plane.gmane.org [80.91.229.3]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NJquHF029714 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 23 Feb 2012 20:52:56 +0100 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1S0eil-0003Uj-TL for libssh2-devel@cool.haxx.se; Thu, 23 Feb 2012 20:52:55 +0100 Received: from 8.pool85-54-102.dynamic.orange.es ([85.54.102.8]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 23 Feb 2012 20:52:55 +0100 Received: from sfandino by 8.pool85-54-102.dynamic.orange.es with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 23 Feb 2012 20:52:55 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: libssh2-devel@cool.haxx.se From: =?ISO-8859-1?Q?Salvador_Fandi=F1o?= Subject: Re: SFTP issues Date: Thu, 23 Feb 2012 20:52:25 +0100 Lines: 73 Message-ID: <4F4698F9.7060103@yahoo.com> References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> <4F466680.9040605@yahoo.com> Mime-Version: 1.0 X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: 8.pool85-54-102.dynamic.orange.es User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120203 Thunderbird/11.0 In-Reply-To: Cc: Alexander Lamaison X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q1NJqwSO029731 On 02/23/2012 07:50 PM, Alexander Lamaison wrote: > On 22 February 2012 22:55, Salvador Fandiño wrote: > >> I have been testing my module with libssh2 1.4.0 and found that put >> transfers always stall after reading around 262130 +-10 from the channel >> (note that my module does not use the SFTP functionality from libssh2, it >> just connects to the remote server, creates a new channel and then writes >> and reads from it). >> >> After seeing this thread I got the source from git, hoping that my problem >> would have being also solved, but is hasn't. > ... >> I think it would be a good idea to test the patch with bigger transfers >> before making a new release. > > You say you don't use libssh2's SFTP implementation so the changes > introduced by the patch don't apply to your problem. They only change > sftp.c. yes, I know, I was hoping that the libssh2 sftp code were using the same calls for accessing the channel data as Net::SSH2, but after inspecting libssh2 code I can see that it is actually using a lower level API. Net::SSH2 uses libssh2_channel_read_ex and, this may ring a bell, the transfer stalls after exactly 256 * 1024 bytes have been read from the channel. What follows is the combined debug log from Net::SFTP and Net::SSH2, I guess it is easy understandable. Lines beginning by // are my comments: ... # reading at 0/4 Net::SSH2::Channel::read(size = 4, ext = 0) - read 4 bytes - read 4 total # 4 bytes read from SSH channel, total 262108 # reading at 4/4 # reading at 4/28 Net::SSH2::Channel::read(size = 24, ext = 0) - read 24 bytes - read 24 total # 24 bytes read from SSH channel, total 262132 # reading at 28/28 # 4125 bytes written to SSH channel, total 38558276 # reading at 0/4 Net::SSH2::Channel::read(size = 4, ext = 0) - read 4 bytes - read 4 total # 4 bytes read from SSH channel, total 262136 # reading at 4/4 # reading at 4/28 // At this point, 262136 bytes have been read from the channel // Net::SFTP::Foreign tries to read the remaining 24 bytes of the // SSH2_FXP_STATUS response (the packet length, 4bytes, have // already been read) Net::SSH2::Channel::read(size = 24, ext = 0) // Net::SSH2 calls libssh2_channel_read_ex(channel, XLATEXT, b, 24) - read 8 bytes // it reads 8 bytes and returns, at this point, 256*1024 bytes // have been read from the channel. // Net::SSH2 calls libssh2_channel_read_ex(channel, XLATEXT, b, 16) // and it never returns, the debugger reveals the process is // inside "poll". _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Thu Feb 23 21:12:42 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NKCYHJ015166; Thu, 23 Feb 2012 21:12:41 +0100 Received: from mail-qy0-f182.google.com (mail-qy0-f182.google.com [209.85.216.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1NKCVBU015069 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Thu, 23 Feb 2012 21:12:32 +0100 Received: by qcsg15 with SMTP id g15so110233qcs.41 for ; Thu, 23 Feb 2012 12:12:28 -0800 (PST) Received-SPF: pass (google.com: domain of alexander.lamaison@gmail.com designates 10.229.135.80 as permitted sender) client-ip=10.229.135.80; Authentication-Results: mr.google.com; spf=pass (google.com: domain of alexander.lamaison@gmail.com designates 10.229.135.80 as permitted sender) smtp.mail=alexander.lamaison@gmail.com; dkim=pass header.i=alexander.lamaison@gmail.com Received: from mr.google.com ([10.229.135.80]) by 10.229.135.80 with SMTP id m16mr1959839qct.134.1330027948420 (num_hops = 1); Thu, 23 Feb 2012 12:12:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type :content-transfer-encoding; bh=mPtkHMpR6amha6Ph7yaZW3vkt6ItmopxBiqcVwFFqdo=; b=wWydmU680VwqxC6W1ctc+gYSL1i+STPAqPDbTbK3ZJuZO+JaTa0NZhAPQRPIwYGNFE ZaB8NQ/fyQEUw4SW9nfzEj5dEab/Ese2JW+sfi8rhPNqyON5mWMaAhpx/b4Lv8g8z63L kINFhcYtJFZHPrb9b55Vs9v8ZjLq/rPGm1jek= MIME-Version: 1.0 Received: by 10.229.135.80 with SMTP id m16mr1686160qct.134.1330027948256; Thu, 23 Feb 2012 12:12:28 -0800 (PST) Received: by 10.229.144.211 with HTTP; Thu, 23 Feb 2012 12:12:28 -0800 (PST) In-Reply-To: References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> <4F466680.9040605@yahoo.com> <4F4698F9.7060103@yahoo.com> Date: Thu, 23 Feb 2012 20:12:28 +0000 X-Google-Sender-Auth: 8jE0k0w0tR09heRAQ10KOaby2EA Message-ID: Subject: SFTP issues From: Alexander Lamaison To: "development, libssh2" X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q1NKCVBU015069 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by giant.haxx.se id q1NKCYHJ015166 I don't think your message made it through to the list - just me. Probably best not to submit through GMane.  Here it is: On 23 February 2012 19:52, Salvador Fandiño wrote: > > > On 02/23/2012 07:50 PM, Alexander Lamaison wrote: >> >> On 22 February 2012 22:55, Salvador >> Fandiño  wrote: >> >> >>> I have been testing my module with libssh2 1.4.0 and found that put >>> transfers always stall after reading around 262130 +-10 from the channel >>> (note that my module does not use the SFTP functionality from libssh2, it >>> just connects to the remote server, creates a new channel and then writes >>> and reads from it). >>> >>> After seeing this thread I got the source from git, hoping that my >>> problem >>> would have being also solved, but is hasn't. >> >> ... >>> >>> I think it would be a good idea to test the patch with bigger transfers >>> before making a new release. >> >> >> You say you don't use libssh2's SFTP implementation so the changes >> introduced by the patch don't apply to your problem.  They only change >> sftp.c. > > > yes, I know, I was hoping that the libssh2 sftp code were using the same > calls for accessing the channel data as Net::SSH2, but after inspecting > libssh2 code I can see that it is actually using a lower level API. > > Net::SSH2 uses libssh2_channel_read_ex and, this may ring a bell, the > transfer stalls after exactly 256 * 1024 bytes have been read from the > channel. This happens to be the default channel windows size.  Just a thought; I've no idea if it's related. > What follows is the combined debug log from Net::SFTP and Net::SSH2, I guess > it is easy understandable. Lines beginning by // are my comments: > > ... > # reading at 0/4 > Net::SSH2::Channel::read(size = 4, ext = 0) > - read 4 bytes > - read 4 total > # 4 bytes read from SSH channel, total 262108 > # reading at 4/4 > # reading at 4/28 > Net::SSH2::Channel::read(size = 24, ext = 0) > - read 24 bytes > - read 24 total > # 24 bytes read from SSH channel, total 262132 > # reading at 28/28 > # 4125 bytes written to SSH channel, total 38558276 > # reading at 0/4 > Net::SSH2::Channel::read(size = 4, ext = 0) > - read 4 bytes > - read 4 total > # 4 bytes read from SSH channel, total 262136 > # reading at 4/4 > # reading at 4/28 > > // At this point, 262136 bytes have been read from the channel > // Net::SFTP::Foreign tries to read the remaining 24 bytes of the > // SSH2_FXP_STATUS response (the packet length, 4bytes, have > // already been read) > > Net::SSH2::Channel::read(size = 24, ext = 0) > > // Net::SSH2 calls libssh2_channel_read_ex(channel, XLATEXT, b, 24) > > - read 8 bytes > > // it reads 8 bytes and returns, at this point, 256*1024 bytes > // have been read from the channel. > // Net::SSH2 calls libssh2_channel_read_ex(channel, XLATEXT, b, 16) > // and it never returns, the debugger reveals the process is > // inside "poll". _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 24 03:02:36 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1O22AXY001803; Fri, 24 Feb 2012 03:02:32 +0100 Received: from smtp101.prem.mail.ac4.yahoo.com (smtp101.prem.mail.ac4.yahoo.com [76.13.13.40]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1O2277r032280 for ; Fri, 24 Feb 2012 03:02:07 +0100 Received: (qmail 26633 invoked from network); 24 Feb 2012 02:02:03 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=DKIM-Signature:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:References:In-Reply-To:Content-Type; b=MJT430GTlpoVn+SxpN/IuBPlbPosvWSsGZaqSfxcSFcC6TjtnFEMJi8M3F+LtX5MykKjjcZ02gzjdgcuDBTSspBqkQ6xIZ+yGWmJu5T48I5zfu9yggF8r9wV0+cnffwUa6Uz8xv6EVyE1ZPHPMyWzlOz1udw5pCwF8cVpPABN8g= ; DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1330048923; bh=X5wtKd85i9FtThJWfQBdOTs/txH0tN98zUaCHp9Qy2k=; h=X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:References:In-Reply-To:Content-Type; b=b96ixIPPAQE6TOj/3Wq/9TikLYFJf5AabFD+k8g1tG/c5pD9IjKyhezeY9Ny7ux+7fNDbmUJh6d9pEGOYWDD68OLoC1VUrBZhapn0hYd5kLf+Gx1ZX257MhmLHFuIzIA/AJPn/5V7RL1Jl9pxCF2hr8INqBX0cByKub32uWWEx4= X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: DZnp0_oVM1nv1pY5gmskY4ZQzVtluLbIQeqdO5.qDUxBd2J yiqKtJB4.cMAU08IgdRNibOBsgDN1XRbghAX7y88YkTvajTu5ZBvRdD75ci6 Cm25cY55GLvinfJW1SH_yb5Wq420IpK_nS9FobuG9LsmLasSRI3X18XMRTaY mQVnBVZWAb0Ddfo.eJ_gqh30k0VlM58QwJaV6jPgwj7OnTyc2MuUhxsSBSFQ iJFvjV972QjqLFpojrZjFuMISJpRMIrL_XJFcXpnvqAXOCKfYxIZf97.owE2 3sGZ1nTbRCRfRIYPitQK36Mg6aMYiXzu8.V7txcnN4hyAoH6FSqCBwBzzWht acMX8A58Vja5FAIxiki1SLL0c1lXUds9ytudHX4JFS8s6OoXWan3iryqGHXR cRWuA4J_E.ZNAXrdCbRhf1CVTaTdfV12WoMUPsAWjzwaJQMJ6ryVQN2ml6jF tEAgmh3pHtAQi4P9R1Ogrr5XvpgbJeP3X X-Yahoo-SMTP: YHDhoKeswBBUWTyRp8e39VlvJYCW Received: from [192.168.20.103] (sfandino@85.54.102.8 with plain) by smtp101.prem.mail.ac4.yahoo.com with SMTP; 23 Feb 2012 18:02:02 -0800 PST Message-ID: <4F46EF8E.2000402@yahoo.com> Date: Fri, 24 Feb 2012 03:01:50 +0100 From: =?ISO-8859-1?Q?Salvador_Fandi=F1o?= User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120203 Thunderbird/11.0 MIME-Version: 1.0 To: libssh2-devel@cool.haxx.se Subject: Re: SFTP issues References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> <4F466680.9040605@yahoo.com> <20120223162820.20414.qmail@stuge.se> In-Reply-To: Content-Type: multipart/mixed; boundary="------------010603020303040903090107" X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se This is a multi-part message in MIME format. --------------010603020303040903090107 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit On 02/23/2012 06:34 PM, Salvador Fandino wrote: > On 02/23/2012 05:28 PM, Peter Stuge wrote: >> Salvador Fandino wrote: >>> problems when his transfers go over >>> 1.5GB using Net::SSH2 compiled against libssh2 1.2.8. >> >> You have to send more information. "It doesn't work" is impossible to >> act on. Send logs. Send packet dumps. Actually with libssh2 they are >> one and the same. >> >> It's impossible to help without any information. > > Did you read the part where I said I am planning to write a proper bug > report? Just that it is going to take me some time to get rid of the > Perl layer. here it goes: Attached is a binary log, "dump.gz", of the read and write operations generated by Net::SFTP::Foreign and a C program, "replay.c", (actually, a hacked version of ssh2.c from the tests directory) that is able to load this log and replay it to some SSH server. Copy "replay.c" and "dump.gz" inside the libssh2-1.4.0 directory and build "replay" with the following command: gcc -Iinclude -Isrc -g -O2 -c -o replay.o replay.c && \ libtool --tag=CC --mode=link gcc -g -O2 -o replay \ replay.o src/libssh2.la Then, create the directory /tmp/test on the server and run the following command: zcat dump.gz | USER=your_login \ PUBKEY=$HOME/.ssh/id_dsa.pub \ PRIVKEY=$HOME/.ssh/id_dsa ./replay After a while you will see ... writing 285 bytes of 285 written count: 285 written current: 285 written total: 2666819 read total: 262141 reading 4 bytes of 4 read count: 3 read current: 3 written total: 2666819 read total: 262144 reading 1 bytes of 4 an at that point, the transfer will stall. BTW, I am using Ubuntu Precise Pangolin (current) for amd64, OpenSSL 1.0.0g and gcc 4.6.1 from the Ubuntu repository and have tested libssh2 1.4.0 and yesterday's git version. I am running the test against localhost:22 that identifies itself as "SSH-2.0-OpenSSH_5.9p1 Debian-2ubuntu2". --------------010603020303040903090107 Content-Type: text/x-csrc; name="replay.c" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="replay.c" /* Self test, based on examples/ssh2.c. */ #include "libssh2_config.h" #include #include #ifdef HAVE_WINDOWS_H # include #endif #ifdef HAVE_WINSOCK2_H # include #endif #ifdef HAVE_SYS_SOCKET_H # include #endif #ifdef HAVE_NETINET_IN_H # include #endif # ifdef HAVE_UNISTD_H #include #endif # ifdef HAVE_ARPA_INET_H #include #endif #include #include #include #include #include #include static int total_read = 0, total_written = 0; static LIBSSH2_SESSION *session; static void write_retry(LIBSSH2_CHANNEL *channel, const char *buffer, int len) { int current_len = 0; while (current_len < len) { fprintf(stderr, "writing %d bytes of %d\n", len - current_len, len); fflush(stderr); int count = libssh2_channel_write_ex(channel, 0, buffer + current_len, len - current_len); fprintf(stderr, "written count: %d\n", count); fflush(stderr); if (count <= 0) { char *err; libssh2_session_last_error(session, &err, 0, 0); fprintf(stderr, "write failed: %s", err); exit(1); } current_len += count; total_written += count; fprintf(stderr, "written current: %d\n\t\twritten total: %d read total: %d\n", current_len, total_written, total_read); fflush(stderr); } } static void read_retry(LIBSSH2_CHANNEL *channel, char *buffer, int len) { int current_len = 0; while (current_len < len) { fprintf(stderr, "reading %d bytes of %d\n", len - current_len, len); fflush(stderr); int count = libssh2_channel_read_ex(channel, 0, buffer + current_len, len - current_len); fprintf(stderr, "read count: %d\n", count); fflush(stderr); if (count <= 0) { char *err; libssh2_session_last_error(session, &err, 0, 0); fprintf(stderr, "read failed: %s", err); exit(1); } current_len += count; total_read += count; fprintf(stderr, "read current: %d\n\t\twritten total: %d read total: %d\n", current_len, total_written, total_read); fflush(stderr); if (total_read > LIBSSH2_CHANNEL_WINDOW_DEFAULT) { fprintf(stderr, "done\n"); exit(0); } } } static void discard_packet(LIBSSH2_CHANNEL *channel) { char buffer[1024]; read_retry(channel, buffer, 4); unsigned int size = (buffer[0] << 24 ) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3]; if (size > 1024) { fprintf(stderr, "packet too big: %d\n", size); exit(1); } read_retry(channel, buffer, size); } int main(int argc, char *argv[]) { unsigned long hostaddr; int sock, i, auth_pw = 0; struct sockaddr_in sin; const char *fingerprint; char *userauthlist; LIBSSH2_CHANNEL *channel; #ifdef WIN32 WSADATA wsadata; WSAStartup(MAKEWORD(2,0), &wsadata); #endif const char *pubkeyfile="etc/user.pub"; const char *privkeyfile="etc/user"; const char *username="password"; const char *password="password"; int ec = 1; (void)argc; (void)argv; if (getenv ("USER")) username = getenv ("USER"); if (getenv ("PRIVKEY")) privkeyfile = getenv ("PRIVKEY"); if (getenv ("PUBKEY")) pubkeyfile = getenv ("PUBKEY"); hostaddr = htonl(0x7F000001); sock = socket(AF_INET, SOCK_STREAM, 0); #ifndef WIN32 fcntl(sock, F_SETFL, 0); #endif sin.sin_family = AF_INET; sin.sin_port = htons(22); sin.sin_addr.s_addr = hostaddr; if (connect(sock, (struct sockaddr*)(&sin), sizeof(struct sockaddr_in)) != 0) { fprintf(stderr, "failed to connect!\n"); return -1; } /* Create a session instance and start it up * This will trade welcome banners, exchange keys, and setup crypto, compression, and MAC layers */ session = libssh2_session_init(); if (libssh2_session_startup(session, sock)) { fprintf(stderr, "Failure establishing SSH session\n"); return -1; } /* At this point we havn't authenticated, * The first thing to do is check the hostkey's fingerprint against our known hosts * Your app may have it hard coded, may go to a file, may present it to the user, that's your call */ fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1); printf("Fingerprint: "); for(i = 0; i < 20; i++) { printf("%02X ", (unsigned char)fingerprint[i]); } printf("\n"); /* check what authentication methods are available */ userauthlist = libssh2_userauth_list(session, username, strlen(username)); printf("Authentication methods: %s\n", userauthlist); if (strstr(userauthlist, "password") != NULL) { auth_pw |= 1; } if (strstr(userauthlist, "keyboard-interactive") != NULL) { auth_pw |= 2; } if (strstr(userauthlist, "publickey") != NULL) { auth_pw |= 4; } if (auth_pw & 4) { /* Authenticate by public key */ if (libssh2_userauth_publickey_fromfile(session, username, pubkeyfile, privkeyfile, password)) { printf("\tAuthentication by public key failed!\n"); goto shutdown; } else { printf("\tAuthentication by public key succeeded.\n"); } } else { printf("No supported authentication methods found!\n"); goto shutdown; } /* Request a shell */ if (!(channel = libssh2_channel_open_ex(session, "session", 7, LIBSSH2_CHANNEL_WINDOW_DEFAULT, LIBSSH2_CHANNEL_PACKET_DEFAULT, NULL, 0))) { fprintf(stderr, "Unable to open a session\n"); goto shutdown; } libssh2_channel_handle_extended_data(channel, LIBSSH2_CHANNEL_EXTENDED_DATA_IGNORE); if (libssh2_channel_process_startup(channel, "subsystem", 9, "sftp", 4) < 0) { fprintf(stderr, "Unable to start subsystem\n"); goto shutdown; } while (1) { switch(getchar()) { case 'w': { unsigned char buffer[65000]; if (fread(buffer, 1, 4, stdin) != 4) { fprintf(stderr, "unable to read dump"); exit(1); } int size = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3]; if (size > sizeof(buffer)) { fprintf(stderr, "saved packet is bigger than buffer: %d", size); exit(1); } if (fread(buffer, 1, size, stdin) != size) { fprintf(stderr, "unable to read dump"); exit(1); } write_retry(channel, buffer, size); break; } case 'r': discard_packet(channel); break; case EOF: exit (0); default: exit (1); } } shutdown: 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(8.14.4/8.14.4/Debian-2) with ESMTP id q1O2wgIc030584; Fri, 24 Feb 2012 03:58:51 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1O2weCS030557 for ; Fri, 24 Feb 2012 03:58:41 +0100 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1O2wbfj027254 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 23 Feb 2012 21:58:37 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1O2waxr014607 for ; Thu, 23 Feb 2012 21:58:36 -0500 Message-ID: <4F46FC86.2030805@redhat.com> Date: Thu, 23 Feb 2012 19:57:10 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2-devel@cool.haxx.se Subject: memory leak in _libssh2_channel_open X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Hi, I have a long running program which essentially opens a ssh session then periodically runs an exec operation over the session in a new channel. I have implemented it as a non-blocking implementation. I am using 1.4.0. The code seems to work well but I notice there is a bit of a leak found by valgrind: ==6656== at 0x4A074CD: malloc (vg_replace_malloc.c:236)^M ==6656== by 0x4EAC420: _libssh2_transport_read (transport.c:458)^M ==6656== by 0x4EA0694: _libssh2_packet_requirev (packet.c:1219)^M ==6656== by 0x4E97526: _libssh2_channel_open (channel.c:233)^M ==6656== by 0x4E97A8C: libssh2_channel_open_ex (channel.c:352)^M ==6656== by 0x405C9F: assembly_ssh_exec (trans_ssh.c:116)^M ==6656== by 0x4C3754A: job_dispatch (loop_job.c:39)^M ==6656== by 0x4C35FA6: qb_loop_run (loop.c:45)^M ==6656== by 0x4034DB: main (caped.c:163)^M If I run my application for 8 hours, the leak adds up to 300k of memory consumed. I had a look into the code for several hours and don't see an immediate way to fix the problem. I'm not sure even what the problem is, as the channel should free all packets on libssh2_channel_free. The code that implements the exec operation is here: https://github.com/pacemaker-cloud/pacemaker-cloud/blob/master/src/trans_ssh.c line 102. Is my state machine for executing an exec operation incorrect, or is there a bug in libssh2 here that is known? Regards -steve _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 24 16:47:29 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OFkhAo017540; Fri, 24 Feb 2012 16:47:26 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1OFkfWf017528 for ; Fri, 24 Feb 2012 16:46:42 +0100 Received: (qmail 28701 invoked by uid 501); 24 Feb 2012 15:46:39 -0000 Message-ID: <20120224154639.28700.qmail@stuge.se> Date: Fri, 24 Feb 2012 16:46:39 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: memory leak in _libssh2_channel_open Mail-Followup-To: libssh2-devel@cool.haxx.se References: <4F46FC86.2030805@redhat.com> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="R92lf0Oi2sxyK3LA" Content-Disposition: inline In-Reply-To: <4F46FC86.2030805@redhat.com> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se --R92lf0Oi2sxyK3LA Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi Steve, Steven Dake wrote: > I have a long running program which essentially opens a ssh session then > periodically runs an exec operation over the session in a new channel. > I have implemented it as a non-blocking implementation. I am using 1.4.0. > > The code seems to work well but I notice there is a bit of a leak found > by valgrind: > ==6656== at 0x4A074CD: malloc (vg_replace_malloc.c:236)^M > ==6656== by 0x4EAC420: _libssh2_transport_read (transport.c:458)^M > ==6656== by 0x4EA0694: _libssh2_packet_requirev (packet.c:1219)^M > ==6656== by 0x4E97526: _libssh2_channel_open (channel.c:233)^M > ==6656== by 0x4E97A8C: libssh2_channel_open_ex (channel.c:352)^M > ==6656== by 0x405C9F: assembly_ssh_exec (trans_ssh.c:116)^M > ==6656== by 0x4C3754A: job_dispatch (loop_job.c:39)^M > ==6656== by 0x4C35FA6: qb_loop_run (loop.c:45)^M > ==6656== by 0x4034DB: main (caped.c:163)^M > > If I run my application for 8 hours, the leak adds up to 300k of memory > consumed. I had a look into the code for several hours and don't see an > immediate way to fix the problem. I'm not sure even what the problem > is, as the channel should free all packets on libssh2_channel_free. The leaked memory is the session->payload buffer, which is actually never freed by libssh2 at all. Please see if the attached patch fixes the leak while still allowing your program to keep running for a long time. I'm not completely sure if the payload would need to be freed explicitly in _session_free() or if there will always be a packet in the packets list refering to it. Unsure. It would be helpful if you could test more. If my theory is correct then memcheck should still report exactly one packet leaked, regardless of running time. Then I will add freeing also to _session_free(). > is there a bug in libssh2 here that is known? Not known bug. I think most don't have long running sessions. //Peter --R92lf0Oi2sxyK3LA Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="dontleakpayload.patch" diff --git a/src/transport.c b/src/transport.c index 057dcf5..639984c 100644 --- a/src/transport.c +++ b/src/transport.c @@ -142,6 +142,7 @@ decrypt(LIBSSH2_SESSION * session, unsigned char *source, if (session->remote.crypt->crypt(session, source, &session->remote.crypt_abstract)) { LIBSSH2_FREE(session, p->payload); + p->payload = NULL; return LIBSSH2_ERROR_DECRYPT; } @@ -217,6 +218,7 @@ fullpacket(LIBSSH2_SESSION * session, int encrypted /* 1 or 0 */ ) session->fullpacket_payload_len, &session->remote.comp_abstract); LIBSSH2_FREE(session, p->payload); + p->payload = NULL; if(rc) return rc; @@ -448,6 +450,13 @@ int _libssh2_transport_read(LIBSSH2_SESSION * session) return LIBSSH2_ERROR_OUT_OF_BOUNDARY; } + /* If a packet was already allocated we must free it now. + * It would be nicer to keep track of allocated size, and + * only realloc when really neccessary. + */ + if (p->payload) + LIBSSH2_FREE(session, p->payload); + /* Get a packet handle put data into. We get one to hold all data, including padding and MAC. */ p->payload = LIBSSH2_ALLOC(session, total_num); --R92lf0Oi2sxyK3LA Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel --R92lf0Oi2sxyK3LA-- From libssh2-devel-bounces@cool.haxx.se Fri Feb 24 17:09:50 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OG9djf002272; Fri, 24 Feb 2012 17:09:48 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OG9bCM002259 for ; Fri, 24 Feb 2012 17:09:38 +0100 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1OG9bG6019436 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 24 Feb 2012 11:09:37 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1OG9aCg030044 for ; Fri, 24 Feb 2012 11:09:37 -0500 Message-ID: <4F47B5EB.3090209@redhat.com> Date: Fri, 24 Feb 2012 09:08:11 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2-devel@cool.haxx.se Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> <20120224154639.28700.qmail@stuge.se> In-Reply-To: <20120224154639.28700.qmail@stuge.se> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 02/24/2012 08:46 AM, Peter Stuge wrote: > Hi Steve, > > Steven Dake wrote: >> I have a long running program which essentially opens a ssh session then >> periodically runs an exec operation over the session in a new channel. >> I have implemented it as a non-blocking implementation. I am using 1.4.0. >> >> The code seems to work well but I notice there is a bit of a leak found >> by valgrind: >> ==6656== at 0x4A074CD: malloc (vg_replace_malloc.c:236)^M >> ==6656== by 0x4EAC420: _libssh2_transport_read (transport.c:458)^M >> ==6656== by 0x4EA0694: _libssh2_packet_requirev (packet.c:1219)^M >> ==6656== by 0x4E97526: _libssh2_channel_open (channel.c:233)^M >> ==6656== by 0x4E97A8C: libssh2_channel_open_ex (channel.c:352)^M >> ==6656== by 0x405C9F: assembly_ssh_exec (trans_ssh.c:116)^M >> ==6656== by 0x4C3754A: job_dispatch (loop_job.c:39)^M >> ==6656== by 0x4C35FA6: qb_loop_run (loop.c:45)^M >> ==6656== by 0x4034DB: main (caped.c:163)^M >> >> If I run my application for 8 hours, the leak adds up to 300k of memory >> consumed. I had a look into the code for several hours and don't see an >> immediate way to fix the problem. I'm not sure even what the problem >> is, as the channel should free all packets on libssh2_channel_free. > > The leaked memory is the session->payload buffer, which is actually > never freed by libssh2 at all. > Peter, Thanks for responding so quickly, I'll be happy to try out your patch later today and report results back sometime this weekend. > Please see if the attached patch fixes the leak while still allowing > your program to keep running for a long time. I'm not completely sure > if the payload would need to be freed explicitly in _session_free() I had thought along these same lines, but the problem with freeing in sesson_free is that I don't free my session unless the connection is determined faulty. I could free and create a new session occasionally to hack around that, but seems like there should be a better way ;) > or if there will always be a packet in the packets list refering to > it. Unsure. It would be helpful if you could test more. If my theory > is correct then memcheck should still report exactly one packet > leaked, regardless of running time. Then I will add freeing also to > _session_free(). > > one packet leaked is ok (with me), thousands not ok (current codebase). >> is there a bug in libssh2 here that is known? > > Not known bug. I think most don't have long running sessions. > Well I'm here to help with finding any bugs/leaks/etc with libssh2. I can even help fix them - I've studied the code base for about 12 hours so have a reasonable idea of how it operates. Regards -steve > > //Peter > > > > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 24 17:15:07 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OGF2rj006280; Fri, 24 Feb 2012 17:15:07 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1OGF0W2005777 for ; Fri, 24 Feb 2012 17:15:00 +0100 Received: (qmail 30931 invoked by uid 501); 24 Feb 2012 16:15:01 -0000 Message-ID: <20120224161501.30930.qmail@stuge.se> Date: Fri, 24 Feb 2012 17:15:01 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: memory leak in _libssh2_channel_open Mail-Followup-To: libssh2-devel@cool.haxx.se References: <4F46FC86.2030805@redhat.com> <20120224154639.28700.qmail@stuge.se> <4F47B5EB.3090209@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4F47B5EB.3090209@redhat.com> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Steven Dake wrote: > I'll be happy to try out your patch later today and report results back > sometime this weekend. Thanks! > > Please see if the attached patch fixes the leak while still allowing > > your program to keep running for a long time. I'm not completely sure > > if the payload would need to be freed explicitly in _session_free() > > I had thought along these same lines, but the problem with freeing in > sesson_free is that I don't free my session unless the connection is > determined faulty. I could free and create a new session occasionally > to hack around that, but seems like there should be a better way ;) No, freeing session->payload in libssh2_session_free() is not the solution to your problem, but it may be needed to properly clean up. > one packet leaked is ok (with me), thousands not ok (current codebase). One packet leaked is not ok with me. > I'm here to help with finding any bugs/leaks/etc with libssh2. I > can even help fix them - I've studied the code base for about 12 > hours so have a reasonable idea of how it operates. All good. Looking forward to results from testing the patch. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 24 18:15:55 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OHFZPN017609; Fri, 24 Feb 2012 18:15:52 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OHFWqR017599 for ; Fri, 24 Feb 2012 18:15:33 +0100 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1OHFXFC003554 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 24 Feb 2012 12:15:33 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id q1OHFWjj007426 for ; Fri, 24 Feb 2012 12:15:33 -0500 Message-ID: <4F47C55F.5070305@redhat.com> Date: Fri, 24 Feb 2012 10:14:07 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2-devel@cool.haxx.se Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> <20120224154639.28700.qmail@stuge.se> <4F47B5EB.3090209@redhat.com> <20120224161501.30930.qmail@stuge.se> In-Reply-To: <20120224161501.30930.qmail@stuge.se> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.12 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 02/24/2012 09:15 AM, Peter Stuge wrote: > Steven Dake wrote: >> I'll be happy to try out your patch later today and report results back >> sometime this weekend. > > Thanks! > > >>> Please see if the attached patch fixes the leak while still allowing >>> your program to keep running for a long time. I'm not completely sure >>> if the payload would need to be freed explicitly in _session_free() >> >> I had thought along these same lines, but the problem with freeing in >> sesson_free is that I don't free my session unless the connection is >> determined faulty. I could free and create a new session occasionally >> to hack around that, but seems like there should be a better way ;) > > No, freeing session->payload in libssh2_session_free() is not the > solution to your problem, but it may be needed to properly clean up. > > >> one packet leaked is ok (with me), thousands not ok (current codebase). > > One packet leaked is not ok with me. > Peter, I tried this patch and it resulted in double free followed by segfault from gcc memory checker. Regards -steve > >> I'm here to help with finding any bugs/leaks/etc with libssh2. I >> can even help fix them - I've studied the code base for about 12 >> hours so have a reasonable idea of how it operates. > > All good. Looking forward to results from testing the patch. > > > //Peter > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 24 18:22:25 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OHMLsu022205; Fri, 24 Feb 2012 18:22:25 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1OHMJan022197 for ; Fri, 24 Feb 2012 18:22:19 +0100 Received: (qmail 3832 invoked by uid 501); 24 Feb 2012 17:22:20 -0000 Message-ID: <20120224172220.3831.qmail@stuge.se> Date: Fri, 24 Feb 2012 18:22:20 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: memory leak in _libssh2_channel_open Mail-Followup-To: libssh2-devel@cool.haxx.se References: <4F46FC86.2030805@redhat.com> <20120224154639.28700.qmail@stuge.se> <4F47B5EB.3090209@redhat.com> <20120224161501.30930.qmail@stuge.se> <4F47C55F.5070305@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4F47C55F.5070305@redhat.com> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Steven Dake wrote: > I tried this patch and it resulted in double free followed by > segfault from gcc memory checker. Does valgrind tell where the packet was previously freed? And when does the double free happen? //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 24 18:31:28 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OHVLLJ028626; Fri, 24 Feb 2012 18:31:28 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OHVHl6028589 for ; Fri, 24 Feb 2012 18:31:18 +0100 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1OHVIob028301 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 24 Feb 2012 12:31:18 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1OHVGne023632; Fri, 24 Feb 2012 12:31:17 -0500 Message-ID: <4F47C90F.4050109@redhat.com> Date: Fri, 24 Feb 2012 10:29:51 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2-devel@cool.haxx.se, peter@stuge.se Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> <20120224154639.28700.qmail@stuge.se> <4F47B5EB.3090209@redhat.com> <20120224161501.30930.qmail@stuge.se> <4F47C55F.5070305@redhat.com> <20120224172220.3831.qmail@stuge.se> In-Reply-To: <20120224172220.3831.qmail@stuge.se> Content-Type: multipart/mixed; boundary="------------060802080201010404050005" X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se This is a multi-part message in MIME format. --------------060802080201010404050005 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On 02/24/2012 10:22 AM, Peter Stuge wrote: > Steven Dake wrote: >> I tried this patch and it resulted in double free followed by >> segfault from gcc memory checker. > > Does valgrind tell where the packet was previously freed? > > And when does the double free happen? > > > //Peter > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel I have attached a gz of the typescript run of valgrind All sorts of bad things happen with that patch (those problems didn't occur prior to patch) --------------060802080201010404050005 Content-Type: application/x-gzip; name="typescript.gz" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="typescript.gz" 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foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1OIIGId028786 for ; Fri, 24 Feb 2012 19:18:16 +0100 Received: (qmail 8123 invoked by uid 501); 24 Feb 2012 18:18:16 -0000 Message-ID: <20120224181816.8122.qmail@stuge.se> Date: Fri, 24 Feb 2012 19:18:16 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: memory leak in _libssh2_channel_open Mail-Followup-To: libssh2-devel@cool.haxx.se References: <4F46FC86.2030805@redhat.com> <20120224154639.28700.qmail@stuge.se> <4F47B5EB.3090209@redhat.com> <20120224161501.30930.qmail@stuge.se> <4F47C55F.5070305@redhat.com> <20120224172220.3831.qmail@stuge.se> <4F47C90F.4050109@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4F47C90F.4050109@redhat.com> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Hi! Steven Dake wrote: > >> I tried this patch and it resulted in double free followed by > >> segfault from gcc memory checker. > > > > Does valgrind tell where the packet was previously freed? > > > > And when does the double free happen? > > I have attached a gz of the typescript run of valgrind > > All sorts of bad things happen with that patch (those problems > didn't occur prior to patch) Yes. Looking a little closer the change is too naive. I don't like this code at all. :( Could you revert the patch and find out if the leak is from data transfer or from channel create/free? //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 24 19:26:46 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OIQfNE003164; Fri, 24 Feb 2012 19:26:46 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OIQdXW003136 for ; Fri, 24 Feb 2012 19:26:39 +0100 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1OIQbfM001798 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 24 Feb 2012 13:26:37 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id q1OIQaws030873 for ; Fri, 24 Feb 2012 13:26:36 -0500 Message-ID: <4F47D607.9050503@redhat.com> Date: Fri, 24 Feb 2012 11:25:11 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2-devel@cool.haxx.se Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> <20120224154639.28700.qmail@stuge.se> <4F47B5EB.3090209@redhat.com> <20120224161501.30930.qmail@stuge.se> <4F47C55F.5070305@redhat.com> <20120224172220.3831.qmail@stuge.se> <4F47C90F.4050109@redhat.com> <20120224181816.8122.qmail@stuge.se> In-Reply-To: <20120224181816.8122.qmail@stuge.se> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.12 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 02/24/2012 11:18 AM, Peter Stuge wrote: > Hi! > > Steven Dake wrote: >>>> I tried this patch and it resulted in double free followed by >>>> segfault from gcc memory checker. >>> >>> Does valgrind tell where the packet was previously freed? >>> >>> And when does the double free happen? >> >> I have attached a gz of the typescript run of valgrind >> >> All sorts of bad things happen with that patch (those problems >> didn't occur prior to patch) > > Yes. Looking a little closer the change is too naive. I don't like > this code at all. :( > > Could you revert the patch and find out if the leak is from data > transfer or from channel create/free? > > The leak seems to occur when a non-blocking channel_open occurs, but returns EAGAIN (and not all the time). In this case it is transferring some data, but not enough to close the deal on the open operation. The data packets stay around and are not freed appropriately. The state machine of open looks to me as if it should keep these packets around to finish the non-blocking open operation. I'm not sure if there should be flushing or freeing of these packets after open finishes. In any case, when open returns NULL (and the error is set to EAGAIN) there is no channel to free, although freeing in this way would likely damage the integrity of the nb open state machine. Regards -steve > //Peter > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Fri Feb 24 22:30:11 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OLTkOp014775; Fri, 24 Feb 2012 22:30:06 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OLTiZ2014762 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Fri, 24 Feb 2012 22:29:44 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q1OLTiFa014759 for ; Fri, 24 Feb 2012 22:29:44 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Fri, 24 Feb 2012 22:29:44 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: SFTP issues In-Reply-To: <4F46EF8E.2000402@yahoo.com> Message-ID: References: <20120209111528.27773.qmail@stuge.se> <20120209140623.9606.qmail@stuge.se> <4F466680.9040605@yahoo.com> <20120223162820.20414.qmail@stuge.se> <4F46EF8E.2000402@yahoo.com> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="1129329158-1687613639-1330118984=:14133" X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --1129329158-1687613639-1330118984=:14133 Content-Type: TEXT/PLAIN; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8BIT On Fri, 24 Feb 2012, Salvador Fandiño wrote: > Copy "replay.c" and "dump.gz" inside the libssh2-1.4.0 directory and build > "replay" with the following command: What if you enable debug tracing, don't the last couple of hundred lines tell you anything? (and perhaps you can show them to us!) -- / daniel.haxx.se --1129329158-1687613639-1330118984=:14133 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel --1129329158-1687613639-1330118984=:14133-- From libssh2-devel-bounces@cool.haxx.se Fri Feb 24 23:04:50 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OM4efg011762; Fri, 24 Feb 2012 23:04:49 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1OM4dlC011738 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Fri, 24 Feb 2012 23:04:39 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q1OM4csf011730 for ; Fri, 24 Feb 2012 23:04:38 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Fri, 24 Feb 2012 23:04:38 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: memory leak in _libssh2_channel_open In-Reply-To: <4F46FC86.2030805@redhat.com> Message-ID: References: <4F46FC86.2030805@redhat.com> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Thu, 23 Feb 2012, Steven Dake wrote: > If I run my application for 8 hours, the leak adds up to 300k of memory > consumed. I had a look into the code for several hours and don't see an > immediate way to fix the problem. I'm not sure even what the problem is, as > the channel should free all packets on libssh2_channel_free. I'm curious if the leak remains if your app exits? I mean, could it be packets that are received and are just appended in the incoming package queue and then are never discarded from there? 300K during 8 hours seems like a fairly small amount of memory per packet (assuming you have traffic semi-often on the connection) which would imply that the leak doesn't actually occur that often. Let me point out that the ->payload allocated pointed is normally passed in to _libssh2_packet_add() where the packet is added to the incoming queue and it is subsequently freed when that packet has been handled. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sat Feb 25 00:14:48 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1ONETaA022475; Sat, 25 Feb 2012 00:14:45 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1ONERmH022466 for ; Sat, 25 Feb 2012 00:14:27 +0100 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1ONERLN022500 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 24 Feb 2012 18:14:27 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1ONEQpk028405; Fri, 24 Feb 2012 18:14:26 -0500 Message-ID: <4F48197D.1060201@redhat.com> Date: Fri, 24 Feb 2012 16:13:01 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2 development Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> In-Reply-To: X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 Cc: Daniel Stenberg X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 02/24/2012 03:04 PM, Daniel Stenberg wrote: > On Thu, 23 Feb 2012, Steven Dake wrote: > >> If I run my application for 8 hours, the leak adds up to 300k of >> memory consumed. I had a look into the code for several hours and >> don't see an immediate way to fix the problem. I'm not sure even what >> the problem is, as the channel should free all packets on >> libssh2_channel_free. > > I'm curious if the leak remains if your app exits? I mean, could it be > packets that are received and are just appended in the incoming package > queue and then are never discarded from there? > If my app exits, libssh2 is no longer being consumed by my application and the leak is collected by the operating system. My app uses libssh2, and connects to a sshd daemon on remote virtual machines. It sends various commands every 10 seconds to check health of applications ie: systemctl status httpd systemctl start httpd systemctl stop httpd The processes purpose is to maintain high availability of the VMs, so in a best case scenario it would run for hundreds+ of days. The problem is compounded by the fact that I intend for thousands of these processes to be run on one machine (so in the case of 1000 VMs, thats 300k*1000 leaked per 8 hours). http://www.pacemaker-cloud.org to understand the use case > 300K during 8 hours seems like a fairly small amount of memory per > packet (assuming you have traffic semi-often on the connection) which > would imply that the leak doesn't actually occur that often. > yes data per packet seems small but adds up over time > Let me point out that the ->payload allocated pointed is normally passed > in to _libssh2_packet_add() where the packet is added to the incoming > queue and it is subsequently freed when that packet has been handled. > Perhaps a packet is coming back that is not handled (and thus not freed). Regards -steve _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sat Feb 25 00:18:45 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1ONIfmb025104; Sat, 25 Feb 2012 00:18:45 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1ONIenf025091 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Sat, 25 Feb 2012 00:18:40 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q1ONIeVq025087 for ; Sat, 25 Feb 2012 00:18:40 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Sat, 25 Feb 2012 00:18:40 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: libssh2 development Subject: Re: memory leak in _libssh2_channel_open In-Reply-To: <4F48197D.1060201@redhat.com> Message-ID: References: <4F46FC86.2030805@redhat.com> <4F48197D.1060201@redhat.com> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Fri, 24 Feb 2012, Steven Dake wrote: >> I'm curious if the leak remains if your app exits? I mean, could it be >> packets that are received and are just appended in the incoming package >> queue and then are never discarded from there? > > If my app exits, libssh2 is no longer being consumed by my application and > the leak is collected by the operating system. Sure, but valgrind would still helpfully point out the memory areas that weren't freed by libssh2 and thus were leaks. If they _were_ freed by libssh2 on exit, they were data lingering in some list. Still a leak of some sorts, but it would help us understand what happens. >> 300K during 8 hours seems like a fairly small amount of memory per >> packet > > yes data per packet seems small but adds up over time Oh indeed. I'm not making up excuses, I'm just trying to make observations to figure out patterns of when it happens. -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sat Feb 25 00:21:40 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1ONLaZt027467; Sat, 25 Feb 2012 00:21:39 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1ONLXZP027436 for ; Sat, 25 Feb 2012 00:21:34 +0100 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1ONLY6W025753 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 24 Feb 2012 18:21:34 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1ONLXou011144; Fri, 24 Feb 2012 18:21:33 -0500 Message-ID: <4F481B28.7040409@redhat.com> Date: Fri, 24 Feb 2012 16:20:08 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2 development Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> <4F48197D.1060201@redhat.com> In-Reply-To: X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 Cc: Daniel Stenberg X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 02/24/2012 04:18 PM, Daniel Stenberg wrote: > On Fri, 24 Feb 2012, Steven Dake wrote: > >>> I'm curious if the leak remains if your app exits? I mean, could it >>> be packets that are received and are just appended in the incoming >>> package queue and then are never discarded from there? >> >> If my app exits, libssh2 is no longer being consumed by my application >> and the leak is collected by the operating system. > > Sure, but valgrind would still helpfully point out the memory areas that > weren't freed by libssh2 and thus were leaks. If they _were_ freed by > libssh2 on exit, they were data lingering in some list. Still a leak of > some sorts, but it would help us understand what happens. > Yes I understand now - I'll add a signal handler and correctly free data on exit and report back. Regards -steve >>> 300K during 8 hours seems like a fairly small amount of memory per >>> packet >> >> yes data per packet seems small but adds up over time > > Oh indeed. I'm not making up excuses, I'm just trying to make > observations to figure out patterns of when it happens. > _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sat Feb 25 16:32:20 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1PFVsuq032262; Sat, 25 Feb 2012 16:32:17 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1PFVqje032156 for ; Sat, 25 Feb 2012 16:31:52 +0100 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1PFVn8B023674 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sat, 25 Feb 2012 10:31:49 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1PFVmwH014761; Sat, 25 Feb 2012 10:31:49 -0500 Message-ID: <4F48FE8F.7060300@redhat.com> Date: Sat, 25 Feb 2012 08:30:23 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2 development Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> <4F48197D.1060201@redhat.com> <4F481B28.7040409@redhat.com> In-Reply-To: <4F481B28.7040409@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 Cc: Daniel Stenberg X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 02/24/2012 04:20 PM, Steven Dake wrote: > On 02/24/2012 04:18 PM, Daniel Stenberg wrote: >> On Fri, 24 Feb 2012, Steven Dake wrote: >> >>>> I'm curious if the leak remains if your app exits? I mean, could it >>>> be packets that are received and are just appended in the incoming >>>> package queue and then are never discarded from there? >>> >>> If my app exits, libssh2 is no longer being consumed by my application >>> and the leak is collected by the operating system. >> >> Sure, but valgrind would still helpfully point out the memory areas that >> weren't freed by libssh2 and thus were leaks. If they _were_ freed by >> libssh2 on exit, they were data lingering in some list. Still a leak of >> some sorts, but it would help us understand what happens. >> > > Yes I understand now - I'll add a signal handler and correctly free data > on exit and report back. > Daniel, After adding the sigint handler, letting my app run for 12 hours, then ctrl-c the app inside valgrind, the leaks are collected by the sigint handler. My sigint handler frees any open channels at the time via libssh2_channel_free() and frees any open sessions| via libssh2_session_free(). There are some other key gen releated 1-3 block leaks which don't concern me (and I am probably not cleaning up ssh globally). So it appears the packets are still present on the session list but somehow dropped by the open call and not removed. If you have other suggestions for getting to the root cause please let me know. I am happy to help. Regards -steve > Regards > -steve > >>>> 300K during 8 hours seems like a fairly small amount of memory per >>>> packet >>> >>> yes data per packet seems small but adds up over time >> >> Oh indeed. I'm not making up excuses, I'm just trying to make >> observations to figure out patterns of when it happens. >> > > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sat Feb 25 17:13:03 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1PGCrwG004923; Sat, 25 Feb 2012 17:13:02 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1PGComi004906 for ; Sat, 25 Feb 2012 17:12:51 +0100 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1PGCpw4006747 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Sat, 25 Feb 2012 11:12:51 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1PGCoep008813 for ; Sat, 25 Feb 2012 11:12:51 -0500 Message-ID: <4F49082D.7040602@redhat.com> Date: Sat, 25 Feb 2012 09:11:25 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2 development Subject: sharing experiences with nonblocking exec and NVAL from libssh2_channel_wait_closed() with community X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Hi, I have a state machine which does the following: libssh2_channel_open() libssh2_channel_exec() libssh2_channel_send_eof() libssh2_channel_wait_eof() libssh2_channel_close() libssh2_channel_read() libssh2_channel_wait_closed() libssh2_channel_free() In the case thet libssh2_channel_wait_closed() returns LIBSSH2_ERROR_INVAL, the code goes back to the READ state and schedules more reads until WAIT_CLOSED returns 0. This will cause the wait_closed() operation to finally return 0 (rather then -34 or -37). The reason for the enter back into the read state is that libssh2_channel_wait_closed() checks for eof, and even though the code has already checked and passed the EOF state, further packets appear to be sent on the channel. This causes the internal code to mask the EOF state which can only be corrected by reading packets. This seems like some kind of odd race condition to me, but fwiw I hope others find this state machine helpful if implementing nonblocking ssh connecting software of their own: https://github.com/pacemaker-cloud/pacemaker-cloud/blob/master/src/trans_ssh.c Regards -steve _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sat Feb 25 20:19:20 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1PJJIdw022266; Sat, 25 Feb 2012 20:19:20 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1PJJGBC022257 for ; Sat, 25 Feb 2012 20:19:16 +0100 Received: (qmail 20650 invoked by uid 501); 25 Feb 2012 19:19:18 -0000 Message-ID: <20120225191918.20649.qmail@stuge.se> Date: Sat, 25 Feb 2012 20:19:18 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: sharing experiences with nonblocking exec and NVAL from libssh2_channel_wait_closed() with community Mail-Followup-To: libssh2-devel@cool.haxx.se References: <4F49082D.7040602@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4F49082D.7040602@redhat.com> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Steven Dake wrote: > The reason for the enter back into the read state is that > libssh2_channel_wait_closed() checks for eof, and even though the code > has already checked and passed the EOF state, further packets appear to > be sent on the channel. I'm not sure if that is allowed. What packets are sent? > This seems like some kind of odd race condition to me, Can you show libssh2 trace output from this happening? //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sat Feb 25 21:00:00 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1PJHe7j021245; Sat, 25 Feb 2012 20:18:01 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1PJHc1v021230 for ; Sat, 25 Feb 2012 20:17:38 +0100 Received: (qmail 20496 invoked by uid 501); 25 Feb 2012 19:17:39 -0000 Message-ID: <20120225191739.20495.qmail@stuge.se> Date: Sat, 25 Feb 2012 20:17:39 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: memory leak in _libssh2_channel_open Mail-Followup-To: libssh2-devel@cool.haxx.se References: <4F46FC86.2030805@redhat.com> <4F48197D.1060201@redhat.com> <4F481B28.7040409@redhat.com> <4F48FE8F.7060300@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4F48FE8F.7060300@redhat.com> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Steven Dake wrote: > After adding the sigint handler, letting my app run for 12 hours, then > ctrl-c the app inside valgrind, the leaks are collected by the sigint > handler. > > My sigint handler frees any open channels at the time via > libssh2_channel_free() and frees any open sessions| via > libssh2_session_free(). Please try without calling _session_free() so that we can test the hypothesis. > So it appears the packets are still present on the session list but > somehow dropped by the open call and not removed. Thanks! //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sat Feb 25 22:25:48 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1PLPSuu004113; Sat, 25 Feb 2012 22:25:46 +0100 Received: from giant.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1PLPQKl004099 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Sat, 25 Feb 2012 22:25:26 +0100 Received: from localhost (dast@localhost) by giant.haxx.se (8.14.4/8.14.4/Submit) with ESMTP id q1PLPQma004091; Sat, 25 Feb 2012 22:25:26 +0100 X-Authentication-Warning: giant.haxx.se: dast owned process doing -bs Date: Sat, 25 Feb 2012 22:25:26 +0100 (CET) From: Daniel Stenberg X-X-Sender: dast@giant.haxx.se To: Steven Dake Subject: Re: memory leak in _libssh2_channel_open In-Reply-To: <4F48FE8F.7060300@redhat.com> Message-ID: References: <4F46FC86.2030805@redhat.com> <4F48197D.1060201@redhat.com> <4F481B28.7040409@redhat.com> <4F48FE8F.7060300@redhat.com> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) X-fromdanielhimself: yes MIME-Version: 1.0 Cc: libssh2 development X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On Sat, 25 Feb 2012, Steven Dake wrote: > So it appears the packets are still present on the session list but somehow > dropped by the open call and not removed. > > If you have other suggestions for getting to the root cause please let me > know. I am happy to help. My suspicion is that the call to _libssh2_list_add() within the src/packet.c:_libssh2_packet_add() function is what adds the packet to the incoming queue of packets, and some packets that arrive are never yanked off that list. If you would add some debug code that would count the length of that linked list and logged it occasionally we could see if that is true. The list should really only grow temporarily and then go back to almost nothing. If that turns out to be true, we then of course need to figure out what packets that are lingering there and how to stop them from doing it! (BTW, I'll be away on a week's vacation starting tomorrow so I might not respond very quickly until I get back.) -- / daniel.haxx.se _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sun Feb 26 12:58:44 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QBwQU1010001; Sun, 26 Feb 2012 12:58:41 +0100 Received: from mail-iy0-f182.google.com (mail-iy0-f182.google.com [209.85.210.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QBvhA2009591 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Sun, 26 Feb 2012 12:57:44 +0100 Received: by iaeo4 with SMTP id o4so6384394iae.41 for ; Sun, 26 Feb 2012 03:57:37 -0800 (PST) Received-SPF: pass (google.com: domain of saptah@gmail.com designates 10.42.168.197 as permitted sender) client-ip=10.42.168.197; Authentication-Results: mr.google.com; spf=pass (google.com: domain of saptah@gmail.com designates 10.42.168.197 as permitted sender) smtp.mail=saptah@gmail.com; dkim=pass header.i=saptah@gmail.com Received: from mr.google.com ([10.42.168.197]) by 10.42.168.197 with SMTP id x5mr10135080icy.6.1330257457903 (num_hops = 1); Sun, 26 Feb 2012 03:57:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; bh=yM7rZdrR1U8FeMl4f6GLfYeKv8JHWHdEeadRzTXFeQ4=; b=VW9Kh6b+oc3sFSTnWBDCt1NARSFFugiQNjFuqbLRJQXkam1cbejTDmefyUYT2PIib6 vN+XmEMj5E1zOGp6+nZjaolLhAAmNeCxvaWIUWhYTIuo4eoJYRpos82sU9BeegtvmIaC swd4mqUnpiHcZ0vJFXjywwFDerks3kHNAi6S4= MIME-Version: 1.0 Received: by 10.42.168.197 with SMTP id x5mr8168211icy.6.1330257457782; Sun, 26 Feb 2012 03:57:37 -0800 (PST) Received: by 10.42.220.135 with HTTP; Sun, 26 Feb 2012 03:57:37 -0800 (PST) Date: Sun, 26 Feb 2012 12:57:37 +0100 Message-ID: Subject: libssh2_channel_read example From: vicent roca daniel To: libssh2-devel@cool.haxx.se X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1771026746==" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se --===============1771026746== Content-Type: multipart/alternative; boundary=90e6ba6e89ca3b200e04b9dcb35b --90e6ba6e89ca3b200e04b9dcb35b Content-Type: text/plain; charset=ISO-8859-1 Hi guys, I'm having problems getting to work properly the function libssh2_channel_read, this is an example code of what I'm doing: /* vars def */ int rc = 0; char buffer2[1024*4]; FILE *file; file = fopen("somefile.txt, "w"); /* reopen the channel for the new command */ new_channel(); /* execute command */ rc = libssh2_channel_exec(channel, "/bin/ssh_command argument1"); while( (read = libssh2_channel_read( channel, buffer2, sizeof(buffer2))) > 0 ) { fwrite(buffer2, sizeof(char), read, file); } fclose( file ); I Don't know if this way of reading an ssh command output, and dumping to a file is correct, becouse I'm getting some segmentation fails forward in the code, and I suspect It came from here.... Anu hints are very welcome! Thanks :) --90e6ba6e89ca3b200e04b9dcb35b Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi guys,
I'm having problems getting to work properly the function l= ibssh2_channel_read, this is an example code of what I'm doing:

= /* vars def */
int rc =3D 0;
char buffer2[1024*4];
FILE *file;



file =3D fopen("somefile.txt, "w");

/* re= open the channel for the new command */
new_channel();

/* execute= =A0 command */=A0=A0=A0
rc =3D libssh2_channel_exec(channel, "/bin= /ssh_command argument1");
=A0=A0=A0
=A0while( (read =3D libssh2_channel_read( channel, buffer2, s= izeof(buffer2))) > 0 )
=A0 {
=A0=A0=A0 =A0=A0=A0 fwrite(buffer2, s= izeof(char), read, file);
=A0 }
=A0
fclose( file );


I Don't know if this way of reading an ssh command output, and dumpin= g to a file is correct, becouse I'm getting some segmentation fails for= ward in the code, and I suspect It came from here....

Anu hints are very welcome! Thanks :)

--90e6ba6e89ca3b200e04b9dcb35b-- --===============1771026746== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel --===============1771026746==-- From libssh2-devel-bounces@cool.haxx.se Sun Feb 26 16:23:41 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QFNIXf017557; Sun, 26 Feb 2012 16:23:37 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QFNFjZ017445 for ; Sun, 26 Feb 2012 16:23:16 +0100 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1QFNAgV024477 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sun, 26 Feb 2012 10:23:10 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1QFN8YD031079; Sun, 26 Feb 2012 10:23:09 -0500 Message-ID: <4F4A4E08.1010502@redhat.com> Date: Sun, 26 Feb 2012 08:21:44 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2-devel@cool.haxx.se Subject: Re: sharing experiences with nonblocking exec and NVAL from libssh2_channel_wait_closed() with community References: <4F49082D.7040602@redhat.com> <20120225191918.20649.qmail@stuge.se> In-Reply-To: <20120225191918.20649.qmail@stuge.se> Content-Type: multipart/mixed; boundary="------------070204040704010502010509" X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 Cc: peter@stuge.se X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se This is a multi-part message in MIME format. --------------070204040704010502010509 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On 02/25/2012 12:19 PM, Peter Stuge wrote: > Steven Dake wrote: >> The reason for the enter back into the read state is that >> libssh2_channel_wait_closed() checks for eof, and even though the code >> has already checked and passed the EOF state, further packets appear to >> be sent on the channel. > > I'm not sure if that is allowed. What packets are sent? > 97 > >> This seems like some kind of odd race condition to me, > > Can you show libssh2 trace output from this happening? > > Turns out I was wrong with "read" fixing up the connection. My code actually has a timer (5 seconds) on the ssh connection and eventually times out the connection on the return of -34. The packet which is sent is 97 (close). The offending code is at channelc:2179: while (packet) { if (((packet->data[0] == SSH_MSG_CHANNEL_DATA) || (packet->data[0] == SSH_MSG_CHANNEL_EXTENDED_DATA)) && (channel->local.id == _libssh2_ntohu32(packet->data + 1))) { /* There's data waiting to be read yet, mask the EOF status */ return 0; } packet = _libssh2_list_next(&packet->node); } (the return 0) I have attached the typescript of the scenario happening. One thing that I noticed after looking at the typescript with libssh2 tracing is that my code may be doing two execs on the same session at the same time (in a nonblocking way). I had assumed two outstanding execs would be safe - is that assumption correct? Could also relate to my packet leaking.. Thanks! -steve > //Peter > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel --------------070204040704010502010509 Content-Type: application/x-gzip; name="typescript.gz" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="typescript.gz" H4sICCBISk8CA3R5cGVzY3JpcHQA7b1plxXF1i388R33jPH8gvslxQZQiMq+2YqSLSCtgiAi YjUbKKnOakBE/e3vmjMyInPnzo27Cqn7nDH0eBShMjIyYsWKNVcz1931/c29Q+fgcHX/cLrh 7O44d492HD92muma47ue77jJJIomge/kN52bd+/95/8+dj8/2Fh9Mb28Nl09OJysPN/dnq7w d1b2p3u7Byt7q+vTbfnP/YvrW7tHGysH++v/3/999JXnBuHzR/u7u4f6SUd+//GHjlpZX92b Xjw4eL7hbEz3Lr7a+5//3Myv3XIebe483XWcx861HZnezvrUObt6cPD64qvd/Y29/enBwcXG i886rzYPnzurGxv4Hees5yr8z3PPOuvPV3eeyTcd7jrffnfr1rVbV5zNHedcFLiZs31wXpnX 7Owebq5PHzvl7s7OdP1wU9ZAfm5vf/cZh5TH5bXT7bWt16MTWHq2268Pft1625y9hXNOfDf9 p+bcTWPBYPr1f/PNj7Y212TL/MeOqyLPC0PPube/unOwt7t/OHEO5AdlTk8oVkd7ztPdfedg d/3F9NBJ55/N3P6zd6c7G5s7z5xiVWazL/999+pFX7kX24eeeCpU7twgURg6d/kGjnDo+MGK 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Content-Disposition: inline _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel --------------070204040704010502010509-- From libssh2-devel-bounces@cool.haxx.se Sun Feb 26 19:44:50 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QIiLdN025258; Sun, 26 Feb 2012 19:44:45 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QIiHg5025151 for ; Sun, 26 Feb 2012 19:44:18 +0100 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1QIiCXj019667 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Sun, 26 Feb 2012 13:44:12 -0500 Received: from beast.broked.org.com (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1QIiB14026833; Sun, 26 Feb 2012 13:44:12 -0500 From: Steven Dake To: libssh2-devel@cool.haxx.se Subject: [PATCH] Add tracing to print packets left on session at libssh2_session_free Date: Sun, 26 Feb 2012 11:42:42 -0700 Message-Id: <1330281762-20255-1-git-send-email-sdake@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 Cc: Steven Dake X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Signed-off-by: Steven Dake --- src/session.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/src/session.c b/src/session.c index f15d003..81cd704 100644 --- a/src/session.c +++ b/src/session.c @@ -828,6 +828,7 @@ session_free(LIBSSH2_SESSION *session) LIBSSH2_PACKET *pkg; LIBSSH2_CHANNEL *ch; LIBSSH2_LISTENER *l; + int packets_left = 0; if (session->free_state == libssh2_NB_state_idle) { _libssh2_debug(session, LIBSSH2_TRACE_TRANS, "Freeing session resource", @@ -1018,6 +1019,9 @@ session_free(LIBSSH2_SESSION *session) /* Cleanup all remaining packets */ while ((pkg = _libssh2_list_first(&session->packets))) { + packets_left++; + _libssh2_debug(session, LIBSSH2_TRACE_TRANS, + "packet left with id %d", pkg->data[0]); /* unlink the node */ _libssh2_list_remove(&pkg->node); @@ -1025,6 +1029,8 @@ session_free(LIBSSH2_SESSION *session) LIBSSH2_FREE(session, pkg->data); LIBSSH2_FREE(session, pkg); } + _libssh2_debug(session, LIBSSH2_TRACE_TRANS, + "Extra packets left %d", packets_left); if(session->socket_prev_blockstate) /* if the socket was previously blocking, put it back so */ -- 1.7.7.6 _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sun Feb 26 20:07:57 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QJ7nlB012265; Sun, 26 Feb 2012 20:07:56 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QJ7kjD012202 for ; Sun, 26 Feb 2012 20:07:47 +0100 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1QJ7eCu005022 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sun, 26 Feb 2012 14:07:42 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id q1QI8uOo012159; Sun, 26 Feb 2012 13:08:58 -0500 Message-ID: <4F4A74E3.3050006@redhat.com> Date: Sun, 26 Feb 2012 11:07:31 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2 development Subject: Re: sharing experiences with nonblocking exec and NVAL from libssh2_channel_wait_closed() with community References: <4F49082D.7040602@redhat.com> <20120225191918.20649.qmail@stuge.se> <4F4A4E08.1010502@redhat.com> In-Reply-To: <4F4A4E08.1010502@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 Cc: peter@stuge.se X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 02/26/2012 08:21 AM, Steven Dake wrote: > On 02/25/2012 12:19 PM, Peter Stuge wrote: >> Steven Dake wrote: >>> The reason for the enter back into the read state is that >>> libssh2_channel_wait_closed() checks for eof, and even though the code >>> has already checked and passed the EOF state, further packets appear to >>> be sent on the channel. >> >> I'm not sure if that is allowed. What packets are sent? >> > 97 > >> >>> This seems like some kind of odd race condition to me, >> >> Can you show libssh2 trace output from this happening? >> >> > > Turns out I was wrong with "read" fixing up the connection. My code > actually has a timer (5 seconds) on the ssh connection and eventually > times out the connection on the return of -34. The packet which is sent > is 97 (close). The offending code is at channelc:2179: > while (packet) { > if (((packet->data[0] == SSH_MSG_CHANNEL_DATA) > || (packet->data[0] == SSH_MSG_CHANNEL_EXTENDED_DATA)) > && (channel->local.id == _libssh2_ntohu32(packet->data + 1))) { > /* There's data waiting to be read yet, mask the EOF status */ > return 0; > } > packet = _libssh2_list_next(&packet->node); > } > > > (the return 0) > > I have attached the typescript of the scenario happening. > > One thing that I noticed after looking at the typescript with libssh2 > tracing is that my code may be doing two execs on the same session at > the same time (in a nonblocking way). > > I had assumed two outstanding execs would be safe - is that assumption > correct? Could also relate to my packet leaking.. > Further follow up on this point. I changed my code around so that it only schedules one non-blocking exec at a time (Ie i go from open to free before doing another open operation). This resolves the -34 error code with the wait_closed but the leak in the other thread we discussed is still present with this change. If multiple non-blocking execs can't be sent on the session, might be helpful to add that info to the man page. If the intent is for multiple non-blocing execs to occur on a session at one time, the code as is appears defective. Hope the extra info helps. Regards -steve > Thanks! > -steve > > > >> //Peter >> _______________________________________________ >> libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel > > > > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sun Feb 26 20:10:34 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QJAVNr014417; Sun, 26 Feb 2012 20:10:34 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QJATIp014385 for ; Sun, 26 Feb 2012 20:10:30 +0100 Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1QJAUC8025112 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sun, 26 Feb 2012 14:10:30 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx12.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1QIC82c005906; Sun, 26 Feb 2012 13:12:09 -0500 Message-ID: <4F4A75A4.7020001@redhat.com> Date: Sun, 26 Feb 2012 11:10:44 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: Daniel Stenberg Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> <4F48197D.1060201@redhat.com> <4F481B28.7040409@redhat.com> <4F48FE8F.7060300@redhat.com> In-Reply-To: X-Scanned-By: MIMEDefang 2.68 on 10.5.11.25 Cc: libssh2 development X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se On 02/25/2012 02:25 PM, Daniel Stenberg wrote: > On Sat, 25 Feb 2012, Steven Dake wrote: > >> So it appears the packets are still present on the session list but >> somehow dropped by the open call and not removed. >> >> If you have other suggestions for getting to the root cause please let >> me know. I am happy to help. > > My suspicion is that the call to _libssh2_list_add() within the > src/packet.c:_libssh2_packet_add() function is what adds the packet to > the incoming queue of packets, and some packets that arrive are never > yanked off that list. > > If you would add some debug code that would count the length of that > linked list and logged it occasionally we could see if that is true. The > list should really only grow temporarily and then go back to almost > nothing. If that turns out to be true, we then of course need to figure > out what packets that are lingering there and how to stop them from > doing it! Thanks for the tip. I'll see if I can instrument this code as you suggested and determine which packet id is pending on the list if the list doesn't go to zero. Enjoy your vacation Regards -steve > > (BTW, I'll be away on a week's vacation starting tomorrow so I might not > respond very quickly until I get back.) > _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sun Feb 26 20:18:17 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QJI78m019887; Sun, 26 Feb 2012 20:18:16 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QJI5ov019870 for ; Sun, 26 Feb 2012 20:18:05 +0100 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1QJI5WB008121 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sun, 26 Feb 2012 14:18:05 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1QJI3jt019516; Sun, 26 Feb 2012 14:18:05 -0500 Message-ID: <4F4A8517.9050808@redhat.com> Date: Sun, 26 Feb 2012 12:16:39 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: Daniel Stenberg Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> <4F48197D.1060201@redhat.com> <4F481B28.7040409@redhat.com> <4F48FE8F.7060300@redhat.com> In-Reply-To: X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 Cc: libssh2 development X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q1QJI78m019887 On 02/25/2012 02:25 PM, Daniel Stenberg wrote: > On Sat, 25 Feb 2012, Steven Dake wrote: > >> So it appears the packets are still present on the session list but >> somehow dropped by the open call and not removed. >> >> If you have other suggestions for getting to the root cause please let >> me know. I am happy to help. > > My suspicion is that the call to _libssh2_list_add() within the > src/packet.c:_libssh2_packet_add() function is what adds the packet to > the incoming queue of packets, and some packets that arrive are never > yanked off that list. > > If you would add some debug code that would count the length of that > linked list and logged it occasionally we could see if that is true. The > list should really only grow temporarily and then go back to almost > nothing. If that turns out to be true, we then of course need to figure > out what packets that are lingering there and how to stop them from > doing it! > > (BTW, I'll be away on a week's vacation starting tomorrow so I might not > respond very quickly until I get back.) > I have found two packets that seem to leak into the session packet list which are not removed The packet id 3 (#define SSH_MSG_UNIMPLEMENTED) seems to leak 1 or 2 times. Stack trace: #0 0x000000366b436285 in raise () from /lib64/libc.so.6 #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 #4 0x00007ffff7b5684b in _libssh2_packet_add (session=0x62eea0, data=0x623500 "\024\250x\006\275 \336!\220\070\371#\375uĊ%", datalen=769, macstate=0) at packet.c:429 #5 0x00007ffff7b6a96f in fullpacket (session=0x62eea0, encrypted=0) at transport.c:236 #6 0x00007ffff7b6b1f3 in _libssh2_transport_read (session=0x62eea0) at transport.c:556 #7 0x00007ffff7b57f4a in _libssh2_packet_require (session=0x62eea0, packet_type=20 '\024', data=0x63bcb8, data_len=0x63bcc0, match_ofs=0, match_buf=0x0, match_len=0, state= 0x63bb60) at packet.c:1097 #8 0x00007ffff7b54167 in _libssh2_kex_exchange (session=0x62eea0, reexchange=0, key_state=0x63bb58) at kex.c:1717 #9 0x00007ffff7b5ddf0 in session_startup (session=0x62eea0, sock=12) at session.c:718 #10 0x00007ffff7b5e0ba in libssh2_session_handshake (session=0x62eea0, sock=12) at session.c:796 #11 0x00007ffff7b5e112 in libssh2_session_startup (session=0x62eea0, sock=12) at session.c:815 #12 0x000000000040600c in ssh_assembly_connect (data=0x629c60) at trans_ssh.c:374 #13 0x00007ffff7d8b1eb in job_dispatch (item=0x6261b0, p=) at loop_job.c:39 #14 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 #15 qb_loop_run (lp=) at loop.c:206 #16 0x0000000000403745 in main (argc=, argv=0x7fffffffde48) at caped.c:171 The packet id of 82 (#define SSH_MSG_REQUEST_FAILURE 82) leaks continuously. Two stack traces: consistent leaks: #0 0x000000366b436285 in raise () from /lib64/libc.so.6 #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 #4 0x00007ffff7b56864 in _libssh2_packet_add (session=0x655220, data=0x66e9b0 "`", datalen=5, macstate=0) at packet.c:430 #5 0x00007ffff7b6a987 in fullpacket (session=0x655220, encrypted=1) at transport.c:236 #6 0x00007ffff7b6b20b in _libssh2_transport_read (session=0x655220) at transport.c:556 #7 0x00007ffff7b4d8c2 in channel_wait_eof (channel=0x670c80) at channel.c:2213 #8 0x00007ffff7b4d948 in libssh2_channel_wait_eof (channel=0x670c80) at channel.c:2242 #9 0x00000000004058ea in assembly_ssh_exec (data=0x670800) at trans_ssh.c:200 #10 0x00007ffff7d8b1eb in job_dispatch (item=0x66ffc0, p=) at loop_job.c:39 #11 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 #12 qb_loop_run (lp=) at loop.c:206 #13 0x0000000000403745 in main (argc=, argv=0x7fffffffde48) at caped.c:171 a leak during startup on packet 82: (gdb) where #0 0x000000366b436285 in raise () from /lib64/libc.so.6 #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 #4 0x00007ffff7b5684b in _libssh2_packet_add (session=0x62eea0, data=0x6173a0 "\024\341l\241\236\003\\\277\340\256\357ь\364r\320\060", datalen=769, macstate=0) at packet.c:429 #5 0x00007ffff7b6a96f in fullpacket (session=0x62eea0, encrypted=0) at transport.c:236 #6 0x00007ffff7b6b1f3 in _libssh2_transport_read (session=0x62eea0) at transport.c:556 #7 0x00007ffff7b57f4a in _libssh2_packet_require (session=0x62eea0, packet_type=20 '\024', data=0x63bcb8, data_len=0x63bcc0, match_ofs=0, match_buf=0x0, match_len=0, state= 0x63bb60) at packet.c:1097 #8 0x00007ffff7b54167 in _libssh2_kex_exchange (session=0x62eea0, reexchange=0, key_state=0x63bb58) at kex.c:1717 #9 0x00007ffff7b5ddf0 in session_startup (session=0x62eea0, sock=12) at session.c:718 #10 0x00007ffff7b5e0ba in libssh2_session_handshake (session=0x62eea0, sock=12) at session.c:796 #11 0x00007ffff7b5e112 in libssh2_session_startup (session=0x62eea0, sock=12) at session.c:815 #12 0x000000000040600c in ssh_assembly_connect (data=0x629c60) at trans_ssh.c:374 #13 0x00007ffff7d8b1eb in job_dispatch (item=0x6294c0, p=) at loop_job.c:39 #14 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 #15 qb_loop_run (lp=) at loop.c:206 #16 0x0000000000403745 in main (argc=, argv=0x7fffffffde48) at caped.c:171 It appears something related to how I'm using EOF seems to be causing the problem. You mentioned in a different thread that call model I am using may not work. What would you suggest? I'm not sure why there isn't a leak in the open path. Maybe valgrind ha the stack trace recorded incorrectly? Or perhaps I am asserting on the wrong iteration. I'll play with it more and see if I can find more information. Regards -steve _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Sun Feb 26 20:27:20 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QJREVR027226; Sun, 26 Feb 2012 20:27:19 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1QJRBWh027177 for ; Sun, 26 Feb 2012 20:27:12 +0100 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1QJR9Jh000442 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sun, 26 Feb 2012 14:27:09 -0500 Received: from beast.broked.org (ovpn-112-33.phx2.redhat.com [10.3.112.33]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1QJR8hb007110; Sun, 26 Feb 2012 14:27:09 -0500 Message-ID: <4F4A8737.6080301@redhat.com> Date: Sun, 26 Feb 2012 12:25:43 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2 development Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> <4F48197D.1060201@redhat.com> <4F481B28.7040409@redhat.com> <4F48FE8F.7060300@redhat.com> <4F4A8517.9050808@redhat.com> In-Reply-To: <4F4A8517.9050808@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 Cc: Daniel Stenberg X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q1QJREVR027226 On 02/26/2012 12:16 PM, Steven Dake wrote: > On 02/25/2012 02:25 PM, Daniel Stenberg wrote: >> On Sat, 25 Feb 2012, Steven Dake wrote: >> >>> So it appears the packets are still present on the session list but >>> somehow dropped by the open call and not removed. >>> >>> If you have other suggestions for getting to the root cause please let >>> me know. I am happy to help. >> >> My suspicion is that the call to _libssh2_list_add() within the >> src/packet.c:_libssh2_packet_add() function is what adds the packet to >> the incoming queue of packets, and some packets that arrive are never >> yanked off that list. >> >> If you would add some debug code that would count the length of that >> linked list and logged it occasionally we could see if that is true. The >> list should really only grow temporarily and then go back to almost >> nothing. If that turns out to be true, we then of course need to figure >> out what packets that are lingering there and how to stop them from >> doing it! >> >> (BTW, I'll be away on a week's vacation starting tomorrow so I might not >> respond very quickly until I get back.) >> > > I have found two packets that seem to leak into the session packet list > which are not removed > > The packet id 3 (#define SSH_MSG_UNIMPLEMENTED) seems to leak 1 or 2 times. > > Stack trace: > #0 0x000000366b436285 in raise () from /lib64/libc.so.6 > #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 > #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 > #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 > #4 0x00007ffff7b5684b in _libssh2_packet_add (session=0x62eea0, > data=0x623500 "\024\250x\006\275 \336!\220\070\371#\375uĊ%", > datalen=769, macstate=0) at packet.c:429 > #5 0x00007ffff7b6a96f in fullpacket (session=0x62eea0, encrypted=0) at > transport.c:236 > #6 0x00007ffff7b6b1f3 in _libssh2_transport_read (session=0x62eea0) at > transport.c:556 > #7 0x00007ffff7b57f4a in _libssh2_packet_require (session=0x62eea0, > packet_type=20 '\024', data=0x63bcb8, data_len=0x63bcc0, match_ofs=0, > match_buf=0x0, match_len=0, state= > 0x63bb60) at packet.c:1097 > #8 0x00007ffff7b54167 in _libssh2_kex_exchange (session=0x62eea0, > reexchange=0, key_state=0x63bb58) at kex.c:1717 > #9 0x00007ffff7b5ddf0 in session_startup (session=0x62eea0, sock=12) at > session.c:718 > #10 0x00007ffff7b5e0ba in libssh2_session_handshake (session=0x62eea0, > sock=12) at session.c:796 > #11 0x00007ffff7b5e112 in libssh2_session_startup (session=0x62eea0, > sock=12) at session.c:815 > #12 0x000000000040600c in ssh_assembly_connect (data=0x629c60) at > trans_ssh.c:374 > #13 0x00007ffff7d8b1eb in job_dispatch (item=0x6261b0, p= out>) at loop_job.c:39 > #14 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 > #15 qb_loop_run (lp=) at loop.c:206 > #16 0x0000000000403745 in main (argc=, > argv=0x7fffffffde48) at caped.c:171 > > > The packet id of 82 (#define SSH_MSG_REQUEST_FAILURE 82) leaks continuously. > > Two stack traces: > consistent leaks: > #0 0x000000366b436285 in raise () from /lib64/libc.so.6 > #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 > #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 > #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 > #4 0x00007ffff7b56864 in _libssh2_packet_add (session=0x655220, > data=0x66e9b0 "`", datalen=5, macstate=0) at packet.c:430 > #5 0x00007ffff7b6a987 in fullpacket (session=0x655220, encrypted=1) at > transport.c:236 > #6 0x00007ffff7b6b20b in _libssh2_transport_read (session=0x655220) at > transport.c:556 > #7 0x00007ffff7b4d8c2 in channel_wait_eof (channel=0x670c80) at > channel.c:2213 > #8 0x00007ffff7b4d948 in libssh2_channel_wait_eof (channel=0x670c80) at > channel.c:2242 > #9 0x00000000004058ea in assembly_ssh_exec (data=0x670800) at > trans_ssh.c:200 > #10 0x00007ffff7d8b1eb in job_dispatch (item=0x66ffc0, p= out>) at loop_job.c:39 > #11 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 > #12 qb_loop_run (lp=) at loop.c:206 > #13 0x0000000000403745 in main (argc=, > argv=0x7fffffffde48) at caped.c:171 > > > a leak during startup on packet 82: > (gdb) where > #0 0x000000366b436285 in raise () from /lib64/libc.so.6 > #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 > #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 > #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 > #4 0x00007ffff7b5684b in _libssh2_packet_add (session=0x62eea0, > data=0x6173a0 "\024\341l\241\236\003\\\277\340\256\357ь\364r\320\060", > datalen=769, macstate=0) at packet.c:429 > #5 0x00007ffff7b6a96f in fullpacket (session=0x62eea0, encrypted=0) at > transport.c:236 > #6 0x00007ffff7b6b1f3 in _libssh2_transport_read (session=0x62eea0) at > transport.c:556 > #7 0x00007ffff7b57f4a in _libssh2_packet_require (session=0x62eea0, > packet_type=20 '\024', data=0x63bcb8, data_len=0x63bcc0, match_ofs=0, > match_buf=0x0, match_len=0, state= > 0x63bb60) at packet.c:1097 > #8 0x00007ffff7b54167 in _libssh2_kex_exchange (session=0x62eea0, > reexchange=0, key_state=0x63bb58) at kex.c:1717 > #9 0x00007ffff7b5ddf0 in session_startup (session=0x62eea0, sock=12) at > session.c:718 > #10 0x00007ffff7b5e0ba in libssh2_session_handshake (session=0x62eea0, > sock=12) at session.c:796 > #11 0x00007ffff7b5e112 in libssh2_session_startup (session=0x62eea0, > sock=12) at session.c:815 > #12 0x000000000040600c in ssh_assembly_connect (data=0x629c60) at > trans_ssh.c:374 > #13 0x00007ffff7d8b1eb in job_dispatch (item=0x6294c0, p= out>) at loop_job.c:39 > #14 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 > #15 qb_loop_run (lp=) at loop.c:206 > #16 0x0000000000403745 in main (argc=, > argv=0x7fffffffde48) at caped.c:171 > > here is the open leak (gdb) where #0 0x000000366b436285 in raise () from /lib64/libc.so.6 #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 #4 0x00007ffff7b56866 in _libssh2_packet_add (session=0x62eea0, data=0x66f6e0 "[", datalen=17, macstate=0) at packet.c:430 #5 0x00007ffff7b6a98b in fullpacket (session=0x62eea0, encrypted=1) at transport.c:236 #6 0x00007ffff7b6b20f in _libssh2_transport_read (session=0x62eea0) at transport.c:556 #7 0x00007ffff7b58288 in _libssh2_packet_requirev (session=0x62eea0, packet_types=0x7ffff7b70e15 "[\\", data=0x63bf80, data_len=0x63bf88, match_ofs=1, match_buf=0x62512c "", match_len=4, state=0x63bf60) at packet.c:1218 #8 0x00007ffff7b49aa9 in _libssh2_channel_open (session=0x62eea0, channel_type=0x408603 "session", channel_type_len=7, window_size=262144, packet_size=32768, message=0x0, message_len=0) at channel.c:230 #9 0x00007ffff7b49eec in libssh2_channel_open_ex (session=0x62eea0, type=0x408603 "session", type_len=7, window_size=262144, packet_size=32768, msg=0x0, msg_len=0) at channel.c:331 #10 0x0000000000405aa8 in assembly_ssh_exec (data=0x62a490) at trans_ssh.c:145 #11 0x00007ffff7d8b1eb in job_dispatch (item=0x654ad0, p=) at loop_job.c:39 #12 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 #13 qb_loop_run (lp=) at loop.c:206 #14 0x0000000000403745 in main (argc=, argv=0x7fffffffde48) at caped.c:171 > It appears something related to how I'm using EOF seems to be causing > the problem. You mentioned in a different thread that call model I am > using may not work. What would you suggest? > > I'm not sure why there isn't a leak in the open path. Maybe valgrind ha > the stack trace recorded incorrectly? Or perhaps I am asserting on the > wrong iteration. I'll play with it more and see if I can find more > information. > > Regards > -steve > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 28 05:19:15 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1S4J8eq019826; Tue, 28 Feb 2012 05:19:14 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1S4J3Ak019739 for ; Tue, 28 Feb 2012 05:19:04 +0100 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1S4J2ew002790 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 27 Feb 2012 23:19:02 -0500 Received: from beast.broked.org ([10.3.112.11]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1S4J0rv010098; Mon, 27 Feb 2012 23:19:01 -0500 Message-ID: <4F4C5559.1010702@redhat.com> Date: Mon, 27 Feb 2012 21:17:29 -0700 From: Steven Dake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120216 Thunderbird/10.0.1 MIME-Version: 1.0 To: libssh2 development Subject: Re: memory leak in _libssh2_channel_open References: <4F46FC86.2030805@redhat.com> <4F48197D.1060201@redhat.com> <4F481B28.7040409@redhat.com> <4F48FE8F.7060300@redhat.com> <4F4A8517.9050808@redhat.com> <4F4A8737.6080301@redhat.com> In-Reply-To: <4F4A8737.6080301@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 Cc: Daniel Stenberg X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q1S4J8eq019826 On 02/26/2012 12:25 PM, Steven Dake wrote: > On 02/26/2012 12:16 PM, Steven Dake wrote: >> On 02/25/2012 02:25 PM, Daniel Stenberg wrote: >>> On Sat, 25 Feb 2012, Steven Dake wrote: >>> >>>> So it appears the packets are still present on the session list but >>>> somehow dropped by the open call and not removed. >>>> >>>> If you have other suggestions for getting to the root cause please let >>>> me know. I am happy to help. >>> >>> My suspicion is that the call to _libssh2_list_add() within the >>> src/packet.c:_libssh2_packet_add() function is what adds the packet to >>> the incoming queue of packets, and some packets that arrive are never >>> yanked off that list. >>> >>> If you would add some debug code that would count the length of that >>> linked list and logged it occasionally we could see if that is true. The >>> list should really only grow temporarily and then go back to almost >>> nothing. If that turns out to be true, we then of course need to figure >>> out what packets that are lingering there and how to stop them from >>> doing it! >>> >>> (BTW, I'll be away on a week's vacation starting tomorrow so I might not >>> respond very quickly until I get back.) >>> >> >> I have found two packets that seem to leak into the session packet list >> which are not removed >> >> The packet id 3 (#define SSH_MSG_UNIMPLEMENTED) seems to leak 1 or 2 times. >> >> Stack trace: >> #0 0x000000366b436285 in raise () from /lib64/libc.so.6 >> #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 >> #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 >> #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 >> #4 0x00007ffff7b5684b in _libssh2_packet_add (session=0x62eea0, >> data=0x623500 "\024\250x\006\275 \336!\220\070\371#\375uĊ%", >> datalen=769, macstate=0) at packet.c:429 >> #5 0x00007ffff7b6a96f in fullpacket (session=0x62eea0, encrypted=0) at >> transport.c:236 >> #6 0x00007ffff7b6b1f3 in _libssh2_transport_read (session=0x62eea0) at >> transport.c:556 >> #7 0x00007ffff7b57f4a in _libssh2_packet_require (session=0x62eea0, >> packet_type=20 '\024', data=0x63bcb8, data_len=0x63bcc0, match_ofs=0, >> match_buf=0x0, match_len=0, state= >> 0x63bb60) at packet.c:1097 >> #8 0x00007ffff7b54167 in _libssh2_kex_exchange (session=0x62eea0, >> reexchange=0, key_state=0x63bb58) at kex.c:1717 >> #9 0x00007ffff7b5ddf0 in session_startup (session=0x62eea0, sock=12) at >> session.c:718 >> #10 0x00007ffff7b5e0ba in libssh2_session_handshake (session=0x62eea0, >> sock=12) at session.c:796 >> #11 0x00007ffff7b5e112 in libssh2_session_startup (session=0x62eea0, >> sock=12) at session.c:815 >> #12 0x000000000040600c in ssh_assembly_connect (data=0x629c60) at >> trans_ssh.c:374 >> #13 0x00007ffff7d8b1eb in job_dispatch (item=0x6261b0, p=> out>) at loop_job.c:39 >> #14 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 >> #15 qb_loop_run (lp=) at loop.c:206 >> #16 0x0000000000403745 in main (argc=, >> argv=0x7fffffffde48) at caped.c:171 >> >> >> The packet id of 82 (#define SSH_MSG_REQUEST_FAILURE 82) leaks continuously. >> >> Two stack traces: >> consistent leaks: >> #0 0x000000366b436285 in raise () from /lib64/libc.so.6 >> #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 >> #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 >> #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 >> #4 0x00007ffff7b56864 in _libssh2_packet_add (session=0x655220, >> data=0x66e9b0 "`", datalen=5, macstate=0) at packet.c:430 >> #5 0x00007ffff7b6a987 in fullpacket (session=0x655220, encrypted=1) at >> transport.c:236 >> #6 0x00007ffff7b6b20b in _libssh2_transport_read (session=0x655220) at >> transport.c:556 >> #7 0x00007ffff7b4d8c2 in channel_wait_eof (channel=0x670c80) at >> channel.c:2213 >> #8 0x00007ffff7b4d948 in libssh2_channel_wait_eof (channel=0x670c80) at >> channel.c:2242 >> #9 0x00000000004058ea in assembly_ssh_exec (data=0x670800) at >> trans_ssh.c:200 >> #10 0x00007ffff7d8b1eb in job_dispatch (item=0x66ffc0, p=> out>) at loop_job.c:39 >> #11 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 >> #12 qb_loop_run (lp=) at loop.c:206 >> #13 0x0000000000403745 in main (argc=, >> argv=0x7fffffffde48) at caped.c:171 >> >> >> a leak during startup on packet 82: >> (gdb) where >> #0 0x000000366b436285 in raise () from /lib64/libc.so.6 >> #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 >> #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 >> #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 >> #4 0x00007ffff7b5684b in _libssh2_packet_add (session=0x62eea0, >> data=0x6173a0 "\024\341l\241\236\003\\\277\340\256\357ь\364r\320\060", >> datalen=769, macstate=0) at packet.c:429 >> #5 0x00007ffff7b6a96f in fullpacket (session=0x62eea0, encrypted=0) at >> transport.c:236 >> #6 0x00007ffff7b6b1f3 in _libssh2_transport_read (session=0x62eea0) at >> transport.c:556 >> #7 0x00007ffff7b57f4a in _libssh2_packet_require (session=0x62eea0, >> packet_type=20 '\024', data=0x63bcb8, data_len=0x63bcc0, match_ofs=0, >> match_buf=0x0, match_len=0, state= >> 0x63bb60) at packet.c:1097 >> #8 0x00007ffff7b54167 in _libssh2_kex_exchange (session=0x62eea0, >> reexchange=0, key_state=0x63bb58) at kex.c:1717 >> #9 0x00007ffff7b5ddf0 in session_startup (session=0x62eea0, sock=12) at >> session.c:718 >> #10 0x00007ffff7b5e0ba in libssh2_session_handshake (session=0x62eea0, >> sock=12) at session.c:796 >> #11 0x00007ffff7b5e112 in libssh2_session_startup (session=0x62eea0, >> sock=12) at session.c:815 >> #12 0x000000000040600c in ssh_assembly_connect (data=0x629c60) at >> trans_ssh.c:374 >> #13 0x00007ffff7d8b1eb in job_dispatch (item=0x6294c0, p=> out>) at loop_job.c:39 >> #14 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 >> #15 qb_loop_run (lp=) at loop.c:206 >> #16 0x0000000000403745 in main (argc=, >> argv=0x7fffffffde48) at caped.c:171 >> >> > > here is the open leak > > (gdb) where > #0 0x000000366b436285 in raise () from /lib64/libc.so.6 > #1 0x000000366b437b9b in abort () from /lib64/libc.so.6 > #2 0x000000366b42ee9e in __assert_fail_base () from /lib64/libc.so.6 > #3 0x000000366b42ef42 in __assert_fail () from /lib64/libc.so.6 > #4 0x00007ffff7b56866 in _libssh2_packet_add (session=0x62eea0, > data=0x66f6e0 "[", datalen=17, macstate=0) at packet.c:430 > #5 0x00007ffff7b6a98b in fullpacket (session=0x62eea0, encrypted=1) at > transport.c:236 > #6 0x00007ffff7b6b20f in _libssh2_transport_read (session=0x62eea0) at > transport.c:556 > #7 0x00007ffff7b58288 in _libssh2_packet_requirev (session=0x62eea0, > packet_types=0x7ffff7b70e15 "[\\", data=0x63bf80, data_len=0x63bf88, > match_ofs=1, match_buf=0x62512c "", > match_len=4, state=0x63bf60) at packet.c:1218 > #8 0x00007ffff7b49aa9 in _libssh2_channel_open (session=0x62eea0, > channel_type=0x408603 "session", channel_type_len=7, window_size=262144, > packet_size=32768, message=0x0, > message_len=0) at channel.c:230 > #9 0x00007ffff7b49eec in libssh2_channel_open_ex (session=0x62eea0, > type=0x408603 "session", type_len=7, window_size=262144, > packet_size=32768, msg=0x0, msg_len=0) > at channel.c:331 > #10 0x0000000000405aa8 in assembly_ssh_exec (data=0x62a490) at > trans_ssh.c:145 > #11 0x00007ffff7d8b1eb in job_dispatch (item=0x654ad0, p= out>) at loop_job.c:39 > #12 0x00007ffff7d89d37 in qb_loop_run_level (level=0x60ff30) at loop.c:45 > #13 qb_loop_run (lp=) at loop.c:206 > #14 0x0000000000403745 in main (argc=, > argv=0x7fffffffde48) at caped.c:171 > > >> It appears something related to how I'm using EOF seems to be causing >> the problem. You mentioned in a different thread that call model I am >> using may not work. What would you suggest? >> >> I'm not sure why there isn't a leak in the open path. Maybe valgrind ha >> the stack trace recorded incorrectly? Or perhaps I am asserting on the >> wrong iteration. I'll play with it more and see if I can find more >> information. >> >> Regards >> -steve Hi, I have found with my tracing patch I previously posted that the cause of the problem of the heavy leak was related to using the following api: libssh2_keepalive_config If the code passes 1 in the want_reply parameter, the ssh server (fedora 16 opensshd) responds with a REQUEST_FAILURE (82) for every keepalive_send the code calls. I am not sure where the error is there, but I'd expect a REQUEST_FAILURE would result in no packet allocation in packet add. I haven't provided a patch as I'm not sure exactly what the solution should be. Regards -steve \>> _______________________________________________ >> libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel > > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 28 05:52:03 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1S49IbO007276; Tue, 28 Feb 2012 05:09:40 +0100 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1S499bS007196 for ; Tue, 28 Feb 2012 05:09:10 +0100 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1S40Jls004998 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Mon, 27 Feb 2012 23:00:37 -0500 Received: from beast.broked.org.com ([10.3.112.11]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q1S40GN7030927; Mon, 27 Feb 2012 23:00:19 -0500 From: Steven Dake To: libssh2-devel@cool.haxx.se Subject: [PATCH] Follow RFC4253 section 11.4 Date: Mon, 27 Feb 2012 20:58:43 -0700 Message-Id: <1330401523-8188-1-git-send-email-sdake@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 Cc: Steven Dake X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se 11.4. Reserved Messages An implementation MUST respond to all unrecognized messages with an SSH_MSG_UNIMPLEMENTED message in the order in which the messages were received. Such messages MUST be otherwise ignored. Later protocol versions may define other meanings for these message types. byte SSH_MSG_UNIMPLEMENTED uint32 packet sequence number of rejected message Signed-off-by: Steven Dake --- src/packet.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/src/packet.c b/src/packet.c index 5852d0c..882940c 100644 --- a/src/packet.c +++ b/src/packet.c @@ -522,6 +522,11 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data, session->packAdd_state = libssh2_NB_state_idle; return 0; + case SSH_MSG_UNIMPLEMENTED: + LIBSSH2_FREE(session, data); + session->packAdd_state = libssh2_NB_state_idle; + return 0; + /* byte SSH_MSG_DEBUG boolean always_display -- 1.7.7.6 _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 28 17:06:07 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1SALuEb015454; Tue, 28 Feb 2012 11:22:08 +0100 Received: from vps1.henriknordstrom.net (vps1.henriknordstrom.net [IPv6:2a02:750:7::d0a]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1SALnEX015396 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Tue, 28 Feb 2012 11:21:49 +0100 Received: from home.hno.se (home.hno.se [IPv6:2001:470:df90::1]) (authenticated bits=128) by vps1.henriknordstrom.net (8.14.2/8.14.2/Debian-2build1) with ESMTP id q1SALldP003639; Tue, 28 Feb 2012 10:21:49 GMT Received: from [127.0.0.1] (localhost.localdomain [127.0.0.1]) by home.hno.se (8.14.5/8.14.5) with ESMTP id q1SALkUk008772; Tue, 28 Feb 2012 11:21:46 +0100 Message-ID: <1330424506.1025.13.camel@home.hno.se> Subject: Re: [PATCH] Follow RFC4253 section 11.4 From: Henrik =?ISO-8859-1?Q?Nordstr=F6m?= To: libssh2 development Date: Tue, 28 Feb 2012 11:21:46 +0100 In-Reply-To: <1330401523-8188-1-git-send-email-sdake@redhat.com> References: <1330401523-8188-1-git-send-email-sdake@redhat.com> X-Mailer: Evolution 3.2.3 (3.2.3-1.fc16) Mime-Version: 1.0 X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.3.2 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on home.hno.se X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-3.0 (vps1.henriknordstrom.net [IPv6:2a02:750:7::d0a]); Tue, 28 Feb 2012 10:21:49 +0000 (UTC) Cc: Steven Dake X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q1SALuEb015454 mån 2012-02-27 klockan 20:58 -0700 skrev Steven Dake: > 11.4. Reserved Messages > > An implementation MUST respond to all unrecognized messages with an > SSH_MSG_UNIMPLEMENTED message in the order in which the messages were > received. Such messages MUST be otherwise ignored. Later protocol > versions may define other meanings for these message types. > > byte SSH_MSG_UNIMPLEMENTED > uint32 packet sequence number of rejected message > > > + case SSH_MSG_UNIMPLEMENTED: > + LIBSSH2_FREE(session, data); > + session->packAdd_state = libssh2_NB_state_idle; > + return 0; > + Err.. it's an error and needs to be dealt with. If not then the application will not know that the request failed. Regards Henrik _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Tue Feb 28 17:08:41 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1SA9WNN007526; Tue, 28 Feb 2012 11:09:56 +0100 Received: from vps1.henriknordstrom.net (vps1.henriknordstrom.net [IPv6:2a02:750:7::d0a]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1SA9TH8007501 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Tue, 28 Feb 2012 11:09:29 +0100 Received: from home.hno.se (home.hno.se [IPv6:2001:470:df90::1]) (authenticated bits=128) by vps1.henriknordstrom.net (8.14.2/8.14.2/Debian-2build1) with ESMTP id q1SA9RL2022332 for ; Tue, 28 Feb 2012 10:09:29 GMT Received: from [127.0.0.1] (localhost.localdomain [127.0.0.1]) by home.hno.se (8.14.5/8.14.5) with ESMTP id q1SA9Qbo007533 for ; Tue, 28 Feb 2012 11:09:26 +0100 Message-ID: <1330423766.1025.10.camel@home.hno.se> Subject: Re: memory leak in _libssh2_channel_open From: Henrik =?ISO-8859-1?Q?Nordstr=F6m?= To: libssh2-devel@cool.haxx.se Date: Tue, 28 Feb 2012 11:09:26 +0100 In-Reply-To: <4F4C5559.1010702@redhat.com> References: <4F46FC86.2030805@redhat.com> <4F48197D.1060201@redhat.com> <4F481B28.7040409@redhat.com> <4F48FE8F.7060300@redhat.com> <4F4A8517.9050808@redhat.com> <4F4A8737.6080301@redhat.com> <4F4C5559.1010702@redhat.com> X-Mailer: Evolution 3.2.3 (3.2.3-1.fc16) Mime-Version: 1.0 X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.3.2 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on home.hno.se X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-3.0 (vps1.henriknordstrom.net [IPv6:2a02:750:7::d0a]); Tue, 28 Feb 2012 10:09:29 +0000 (UTC) X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by giant.haxx.se id q1SA9WNN007526 mån 2012-02-27 klockan 21:17 -0700 skrev Steven Dake: > I have found with my tracing patch I previously posted that the cause of > the problem of the heavy leak was related to using the following api: > > libssh2_keepalive_config Gah, keepalive again.. > If the code passes 1 in the want_reply parameter, the ssh server (fedora > 16 opensshd) responds with a REQUEST_FAILURE (82) for every > keepalive_send the code calls. I am not sure where the error is there, It's the expected response. keep-alive is done using an unhandled MSG_GLOBAL_REQUEST message. > but I'd expect a REQUEST_FAILURE would result in no packet allocation in > packet add. I haven't provided a patch as I'm not sure exactly what the > solution should be. Errors also need processing, but no one is eating the keepalive error response. Regards Henrik _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 29 08:04:37 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1T74C9K026954; Wed, 29 Feb 2012 08:04:34 +0100 Received: from mail-iy0-f182.google.com (mail-iy0-f182.google.com [209.85.210.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1T7492h026835 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Wed, 29 Feb 2012 08:04:10 +0100 Received: by iahk25 with SMTP id k25so1677922iah.41 for ; Tue, 28 Feb 2012 23:04:04 -0800 (PST) Received-SPF: pass (google.com: domain of xmitchx@gmail.com designates 10.50.182.197 as permitted sender) client-ip=10.50.182.197; Authentication-Results: mr.google.com; spf=pass (google.com: domain of xmitchx@gmail.com designates 10.50.182.197 as permitted sender) smtp.mail=xmitchx@gmail.com; dkim=pass header.i=xmitchx@gmail.com Received: from mr.google.com ([10.50.182.197]) by 10.50.182.197 with SMTP id eg5mr5759267igc.36.1330499044328 (num_hops = 1); Tue, 28 Feb 2012 23:04:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:from:date:x-google-sender-auth:message-id :subject:to:content-type; bh=SsrqaiNuHfvjq4VVDLecLFDs88RFUODI14qt0/HBFsY=; b=E7f+sPMqd9f6BFTVelXSMfaSUxKRaPIgvCi7eY10bVUHHfotg4esJhMIddSVScOv1k RerMbXnSwKckTNf0A6/UjIJIsN8xFjjNLLFdy7VmXrVztldArOsyCu8vRkEerOFQ7zrm Kt8xv/oXpoVXQuS5tJEHKKnEjss3V4OXRg5M4= Received: by 10.50.182.197 with SMTP id eg5mr4781292igc.36.1330499044275; Tue, 28 Feb 2012 23:04:04 -0800 (PST) MIME-Version: 1.0 Received: by 10.42.96.6 with HTTP; Tue, 28 Feb 2012 23:03:44 -0800 (PST) From: Mitchell Hashimoto Date: Tue, 28 Feb 2012 23:03:44 -0800 X-Google-Sender-Auth: XRg8DC2ziBRw7NuCKlBaiRwbcpU Message-ID: Subject: Callback for channel data ready To: libssh2-devel@cool.haxx.se X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1228835291==" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se --===============1228835291== Content-Type: multipart/alternative; boundary=14dae9340ac9e8773404ba14f2cf --14dae9340ac9e8773404ba14f2cf Content-Type: text/plain; charset=ISO-8859-1 Hi, I've just started using libssh2 and so far the API and documentation has been fantastic, so thank you very much for that. I have a simple question: If I have multiple channels on top of a session that sent out an `exec`, how do I know when data is ready on each of them? I can use select() on my socket, which tells me when data is ready to be read in general, but how do I know which channel to read on? Of course I could iterate through each channel and do a channel_read() but I was hoping perhaps there was a better way? Thanks! Mitchell --14dae9340ac9e8773404ba14f2cf Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi,

I've just started using libssh2 and so far the A= PI and documentation has been fantastic, so thank you very much for that.

I have a simple question: If I have multiple channe= ls on top of a session that sent out an `exec`, how do I know when data is = ready on each of them? I can use select() on my socket, which tells me when= data is ready to be read in general, but how do I know which channel to re= ad on?

Of course I could iterate through each channel and do a= channel_read() but I was hoping perhaps there was a better way?
=
Thanks!
Mitchell
--14dae9340ac9e8773404ba14f2cf-- --===============1228835291== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel --===============1228835291==-- From libssh2-devel-bounces@cool.haxx.se Wed Feb 29 09:08:19 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1T882WQ012928; Wed, 29 Feb 2012 09:08:17 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1T8819V012798 for ; Wed, 29 Feb 2012 09:08:01 +0100 Received: (qmail 13737 invoked by uid 501); 29 Feb 2012 08:08:00 -0000 Message-ID: <20120229080800.13736.qmail@stuge.se> Date: Wed, 29 Feb 2012 09:08:00 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: Callback for channel data ready Mail-Followup-To: libssh2-devel@cool.haxx.se References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Mitchell Hashimoto wrote: > I could iterate through each channel and do a channel_read() Indeed. See example/direct_tcpip.c or example/tcpip-forward.c. > but I was hoping perhaps there was a better way? Sorry not at this time. I think we want callbacks though, so feel free to discuss and send patches. :) //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 29 09:17:24 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1T8HJPg018716; Wed, 29 Feb 2012 09:17:23 +0100 Received: from vps1.henriknordstrom.net (vps1.henriknordstrom.net [IPv6:2a02:750:7::d0a]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1T8HHnn018706 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Wed, 29 Feb 2012 09:17:17 +0100 Received: from home.hno.se (home.hno.se [IPv6:2001:470:df90::1]) (authenticated bits=128) by vps1.henriknordstrom.net (8.14.2/8.14.2/Debian-2build1) with ESMTP id q1T8HGaG011985 for ; Wed, 29 Feb 2012 08:17:18 GMT Received: from [127.0.0.1] (localhost.localdomain [127.0.0.1]) by home.hno.se (8.14.5/8.14.5) with ESMTP id q1T8HFUM011288 for ; Wed, 29 Feb 2012 09:17:15 +0100 Message-ID: <1330503435.9655.2.camel@home.hno.se> Subject: Re: Callback for channel data ready From: Henrik =?ISO-8859-1?Q?Nordstr=F6m?= To: libssh2 development Date: Wed, 29 Feb 2012 09:17:15 +0100 In-Reply-To: References: X-Mailer: Evolution 3.2.3 (3.2.3-1.fc16) Mime-Version: 1.0 X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.3.2 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on home.hno.se X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-3.0 (vps1.henriknordstrom.net [IPv6:2a02:750:7::d0a]); Wed, 29 Feb 2012 08:17:18 +0000 (UTC) X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se tis 2012-02-28 klockan 23:03 -0800 skrev Mitchell Hashimoto: > Of course I could iterate through each channel and do a channel_read() > but I was hoping perhaps there was a better way? Current API requires iterating over them with libssh2_channel_read. Regards Henrik _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 29 16:30:02 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1TFTZu5016666; Wed, 29 Feb 2012 16:29:57 +0100 Received: from nic.appgate.com (nic.appgate.com [79.138.127.130]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1TFTYiG016656 for ; Wed, 29 Feb 2012 16:29:34 +0100 Received: from krakatau.got.appgate.com (krakatau.got.appgate.com [172.23.2.32]) by nic.appgate.com (Postfix) with ESMTP id 42A451F2A47 for ; Wed, 29 Feb 2012 16:29:34 +0100 (MET) Received: from localhost (it.got.cryptzone.com [172.24.4.4]) by krakatau.got.appgate.com (Postfix) with ESMTP id 682BFBD4083 for ; Wed, 29 Feb 2012 16:29:34 +0100 (CET) Received: from 172.24.4.2 (SquirrelMail authenticated user tom) by localhost with HTTP; Wed, 29 Feb 2012 16:29:34 +0100 Message-ID: <35797bd9fe8d03ceffb25140ea07b73e.squirrel@localhost> Date: Wed, 29 Feb 2012 16:29:34 +0100 Subject: Build fails on OpenSolaris From: "Tom Weber" To: libssh2-devel@cool.haxx.se User-Agent: SquirrelMail/1.4.21 MIME-Version: 1.0 X-Priority: 3 (Normal) Importance: Normal X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Hi! The build of 1.4.0 fails in example/x11.c on OpenSolaris snv_89, since that platform lacks cfmakeraw(). I only need the library so I don't need a working x11 example, I just want the example to not be compiled, either through an automatic check or a configure option such as --disable-examples. Right now I'm patching the Makefile but a more sustainable solution would be nicer. This is my configure output: $ ./configure --with-openssl --with-libz checking whether to enable maintainer-specific portions of Makefiles... no checking for sed... /usr/bin/sed checking for a BSD-compatible install... /usr/bin/ginstall -c checking whether build environment is sane... yes checking for gawk... gawk checking whether make sets $(MAKE)... yes checking libssh2 version... 1.4.0 checking build system type... i386-pc-solaris2.11 checking host system type... i386-pc-solaris2.11 configure: autobuild project... libssh2 configure: autobuild revision... 1.4.0 configure: autobuild hostname... configure: autobuild timestamp... 20120229-161414 checking for style of include used by make... GNU checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking dependency style of gcc... gcc3 checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /usr/pd/bin/grep checking for egrep... /usr/pd/bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking for long long... yes checking if _REENTRANT is already defined... no checking if _REENTRANT is actually needed... yes checking if _REENTRANT is onwards defined... yes checking for library containing socket... -lsocket checking for library containing inet_addr... -lnsl checking for gcc... (cached) gcc checking whether we are using the GNU C compiler... (cached) yes checking whether gcc accepts -g... (cached) yes checking for gcc option to accept ISO C89... (cached) none needed checking dependency style of gcc... (cached) gcc3 checking whether ln -s works... yes checking whether make sets $(MAKE)... (cached) yes checking for sshd... no checking for a sed that does not truncate output... (cached) /usr/bin/sed checking for fgrep... /usr/pd/bin/grep -F checking for ld used by gcc... /usr/ccs/bin/ld checking if the linker (/usr/ccs/bin/ld) is GNU ld... no checking for BSD- or MS-compatible name lister (nm)... /usr/pd/opt/gcc3/bin/nm -B checking the name lister (/usr/pd/opt/gcc3/bin/nm -B) interface... BSD nm checking the maximum length of command line arguments... 786240 checking whether the shell understands some XSI constructs... yes checking whether the shell understands "+="... yes checking for /usr/ccs/bin/ld option to reload object files... -r checking for objdump... objdump checking how to recognize dependent libraries... pass_all checking for ar... ar checking for strip... strip checking for ranlib... ranlib checking command to parse /usr/pd/opt/gcc3/bin/nm -B output from gcc object... ok checking for dlfcn.h... yes checking for objdir... .libs checking if gcc supports -fno-rtti -fno-exceptions... no checking for gcc option to produce PIC... -fPIC -DPIC checking if gcc PIC flag -fPIC -DPIC works... yes checking if gcc static flag -static works... no checking if gcc supports -c -o file.o... yes checking if gcc supports -c -o file.o... (cached) yes checking whether the gcc linker (/usr/ccs/bin/ld) supports shared libraries... yes checking whether -lc should be explicitly linked in... yes checking dynamic linker characteristics... solaris2.11 ld.so checking how to hardcode library paths into programs... immediate checking whether stripping libraries is possible... yes checking if libtool supports shared libraries... yes checking whether to build shared libraries... yes checking whether to build static libraries... yes checking whether byte ordering is bigendian... no checking for special C compiler options needed for large files... no checking for _FILE_OFFSET_BITS value needed for large files... 64 checking for ld used by GCC... /usr/ccs/bin/ld checking if the linker (/usr/ccs/bin/ld) is GNU ld... no checking for shared library run path origin... done checking for libssl... yes checking how to link with libssl... -lssl -lcrypto checking for EVP_aes_128_ctr... no checking for libz... yes checking how to link with libz... -lz checking whether to enable pedantic and debug compiler options... no checking whether to enable hidden symbols in the library... no checking errno.h usability... yes checking errno.h presence... yes checking for errno.h... yes checking fcntl.h usability... yes checking fcntl.h presence... yes checking for fcntl.h... yes checking stdio.h usability... yes checking stdio.h presence... yes checking for stdio.h... yes checking for stdlib.h... (cached) yes checking for unistd.h... (cached) yes checking sys/uio.h usability... yes checking sys/uio.h presence... yes checking for sys/uio.h... yes checking sys/select.h usability... yes checking sys/select.h presence... yes checking for sys/select.h... yes checking sys/socket.h usability... yes checking sys/socket.h presence... yes checking for sys/socket.h... yes checking sys/ioctl.h usability... yes checking sys/ioctl.h presence... yes checking for sys/ioctl.h... yes checking sys/time.h usability... yes checking sys/time.h presence... yes checking for sys/time.h... yes checking arpa/inet.h usability... yes checking arpa/inet.h presence... yes checking for arpa/inet.h... yes checking netinet/in.h usability... yes checking netinet/in.h presence... yes checking for netinet/in.h... yes checking sys/un.h usability... yes checking sys/un.h presence... yes checking for sys/un.h... yes checking windows.h usability... no checking windows.h presence... no checking for windows.h... no checking winsock2.h usability... no checking winsock2.h presence... no checking for winsock2.h... no checking ws2tcpip.h usability... no checking ws2tcpip.h presence... no checking for ws2tcpip.h... no checking for poll... yes checking for gettimeofday... yes checking for select... yes checking for strtoll... yes checking for size_t... yes checking for working alloca.h... yes checking for alloca... yes checking for an ANSI C-conforming const... yes checking for inline... inline checking non-blocking sockets style... O_NONBLOCK configure: creating ./config.status config.status: creating Makefile config.status: creating src/Makefile config.status: creating tests/Makefile config.status: creating example/Makefile config.status: creating docs/Makefile config.status: creating libssh2.pc config.status: creating src/libssh2_config.h config.status: creating example/libssh2_config.h config.status: executing depfiles commands config.status: executing libtool commands configure: summary of build options: version: 1.4.0 Host type: i386-pc-solaris2.11 Install prefix: /usr/local Compiler: gcc Compiler flags: -g -O2 Library types: Shared=yes, Static=yes Crypto library: openssl: yes (AES-CTR: no) libgcrypt: no Debug build: no Path to sshd: (only for self-tests) libz compression: yes And this is the relevant portion of the gmake output: ... /bin/bash ../libtool --tag=CC --mode=link gcc -g -O2 -o x11 x11.o ../src/libssh2.la -lnsl -lsocket libtool: link: gcc -g -O2 -o .libs/x11 x11.o ../src/.libs/libssh2.so -lssl -lcrypto -lz -lnsl -lsocket -R/usr/local/lib Undefined first referenced symbol in file cfmakeraw x11.o ld: fatal: Symbol referencing errors. No output written to .libs/x11 collect2: ld returned 1 exit status gmake[2]: *** [x11] Error 1 ... gmake: *** [all-recursive] Error 1 -- Best regards, Tom Weber Cryptzone Group AB _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel From libssh2-devel-bounces@cool.haxx.se Wed Feb 29 17:15:57 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1TGFmeL022390; Wed, 29 Feb 2012 17:15:56 +0100 Received: from nic.appgate.com (nic.appgate.com [79.138.127.130]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1TGFkO2022373 for ; Wed, 29 Feb 2012 17:15:46 +0100 Received: from krakatau.got.appgate.com (krakatau.got.appgate.com [172.23.2.32]) by nic.appgate.com (Postfix) with ESMTP id 20D001F2A44 for ; Wed, 29 Feb 2012 17:15:48 +0100 (MET) Received: from localhost (it.got.cryptzone.com [172.24.4.4]) by krakatau.got.appgate.com (Postfix) with ESMTP id 19267BD4048 for ; Wed, 29 Feb 2012 17:15:48 +0100 (CET) Received: from 172.24.4.2 (SquirrelMail authenticated user tom) by localhost with HTTP; Wed, 29 Feb 2012 17:15:48 +0100 Message-ID: Date: Wed, 29 Feb 2012 17:15:48 +0100 Subject: Timestamp patch for _libssh2_debug() From: "Tom Weber" To: libssh2-devel@cool.haxx.se User-Agent: SquirrelMail/1.4.21 MIME-Version: 1.0 Content-Type: multipart/mixed;boundary="----=_20120229171548_95397" X-Priority: 3 (Normal) Importance: Normal X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se ------=_20120229171548_95397 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Hi! Please include this patch in the next release. You can apply it directly to src/misc.c in 1.4.0. The timestamps generated by _libssh2_debug() measure time since a quite arbitrary point in time. It's the first time the function was called, rounded down to the previous whole second. So if gettimeofday() returned 1000000.123456 the first time, the time 1000000.000000 is taken as the reference. So if the next call occurs at gettimeofday() 1000000.456789, _libssh2_debug() would print 0.456789 as timestamp, instead of 0.333333 which is the actual time difference. This caused some confusion as my application mixes these printouts with similar ones with proper calculation, so the time could seem to jump up and down by as much as a second in the logs. My patch saves also the second fraction at the first call, and makes a proper calculation using carry. Ideally the function should print the time since process invocation, as returned by getrusage(), but that would require more work to port to platforms which don't have it. A cheaper, mostly equivalent way would be to measure time since libssh2_init() was called. -- Best regards, Tom Weber Cryptzone Group AB ------=_20120229171548_95397 Content-Type: application/octet-stream; name="misc.c.patch" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="misc.c.patch" Mzk3YzM5Nwo8ICAgICBzdGF0aWMgaW50IGZpcnN0c2VjOwotLS0KPiAgICAgc3RhdGljIHN0cnVj dCB0aW1ldmFsIGZpcnN0X3RpbWUgPSB7IDAsIDAgfTsKNDI4LDQyOWM0MjgsNDM4CjwgICAgIGlm KCFmaXJzdHNlYykgewo8ICAgICAgICAgZmlyc3RzZWMgPSBub3cudHZfc2VjOwotLS0KPiAgICAg aWYgKCFmaXJzdF90aW1lLnR2X3NlYykgewo+ICAgICAgICAgZmlyc3RfdGltZSA9IG5vdzsKPiAg ICAgfQo+ICAgICBpZiAobm93LnR2X3VzZWMgPCBmaXJzdF90aW1lLnR2X3VzZWMpIHsKPiAgICAg ICAgIC8qIGNhcnJ5ICovCj4gICAgICAgICBub3cudHZfc2VjIC09IGZpcnN0X3RpbWUudHZfc2Vj ICsgMTsKPiAgICAgICAgIG5vdy50dl91c2VjICs9IDEwMDAwMDAgLSBmaXJzdF90aW1lLnR2X3Vz ZWM7Cj4gICAgIH0gZWxzZSB7Cj4gICAgICAgICAvKiBubyBjYXJyeSAqLwo+ICAgICAgICAgbm93 LnR2X3NlYyAtPSBmaXJzdF90aW1lLnR2X3NlYzsKPiAgICAgICAgIG5vdy50dl91c2VjIC09IGZp cnN0X3RpbWUudHZfdXNlYzsKNDMxZDQzOQo8ICAgICBub3cudHZfc2VjIC09IGZpcnN0c2VjOwo0 MzRjNDQyCjwgICAgICAgICAgICAgICAgICAgIChpbnQpbm93LnR2X3NlYywgKGludClub3cudHZf dXNlYywgY29udGV4dHRleHQpOwotLS0KPiAgICAgICAgICAgICAgICAgICAgKGludCkgbm93LnR2 X3NlYywgKGludCkgbm93LnR2X3VzZWMsIGNvbnRleHR0ZXh0KTsK ------=_20120229171548_95397 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel ------=_20120229171548_95397-- From libssh2-devel-bounces@cool.haxx.se Wed Feb 29 19:44:31 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1TIiBhu011790; Wed, 29 Feb 2012 19:44:28 +0100 Received: from mail-iy0-f182.google.com (mail-iy0-f182.google.com [209.85.210.182]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1TIi8Wg011756 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Wed, 29 Feb 2012 19:44:09 +0100 Received: by iahk25 with SMTP id k25so2552956iah.41 for ; Wed, 29 Feb 2012 10:44:03 -0800 (PST) Received-SPF: pass (google.com: domain of xmitchx@gmail.com designates 10.50.37.236 as permitted sender) client-ip=10.50.37.236; Authentication-Results: mr.google.com; spf=pass (google.com: domain of xmitchx@gmail.com designates 10.50.37.236 as permitted sender) smtp.mail=xmitchx@gmail.com; dkim=pass header.i=xmitchx@gmail.com Received: from mr.google.com ([10.50.37.236]) by 10.50.37.236 with SMTP id b12mr1737238igk.36.1330541043190 (num_hops = 1); Wed, 29 Feb 2012 10:44:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:content-type; bh=v4OJgpLSFADVzpGDLo7ScNTz/4ZGecPi4Wt5PXXtj8M=; b=SOb1XNCFMOkuIxR4Hkjx13u3lRCFE6l99mkFOa0hexcaZZr4zE1IkuIx0IBl6X2mgs hu5xhmlRQIXRolpcaj6UySQ7Ar3rAWck3cNe624RYHsMxg5sH9kgppxJftbc7xyneFIm pH+B0BAz2b20PQ5wm9H3rsjyHa+h2D6MSvito= Received: by 10.50.37.236 with SMTP id b12mr1426851igk.36.1330541043150; Wed, 29 Feb 2012 10:44:03 -0800 (PST) MIME-Version: 1.0 Received: by 10.42.96.6 with HTTP; Wed, 29 Feb 2012 10:43:43 -0800 (PST) In-Reply-To: <20120229080800.13736.qmail@stuge.se> References: <20120229080800.13736.qmail@stuge.se> From: Mitchell Hashimoto Date: Wed, 29 Feb 2012 10:43:43 -0800 X-Google-Sender-Auth: YCyD_bgB8FFNyWJbKKH-7aGBqeY Message-ID: Subject: Re: Callback for channel data ready To: libssh2 development X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0572382192==" Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se --===============0572382192== Content-Type: multipart/alternative; boundary=f46d044788d93c705904ba1eba13 --f46d044788d93c705904ba1eba13 Content-Type: text/plain; charset=ISO-8859-1 Peter, On Wed, Feb 29, 2012 at 12:08 AM, Peter Stuge wrote: > Mitchell Hashimoto wrote: > > I could iterate through each channel and do a channel_read() > > Indeed. See example/direct_tcpip.c or example/tcpip-forward.c. > > > > but I was hoping perhaps there was a better way? > > Sorry not at this time. I think we want callbacks though, so feel > free to discuss and send patches. :) > Understood. Thanks. I haven't been using libssh2 long enough to feel comfortable enough in suggesting API improvements, since I haven't quite immersed myself in the "libssh2 way." But I agree that callbacks would be fantastic. Best, Mitchell > > > //Peter > _______________________________________________ > libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel > --f46d044788d93c705904ba1eba13 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Peter,

On Wed, Feb 29, 2012 at 12:08 AM, = Peter Stuge <peter@s= tuge.se> wrote:
Mitchell Hashimoto wrote:
> I could iterate through each channel and do a channel_read()

Indeed. See example/direct_tcpip.c or example/tcpip-forward.c.


> but I was hoping perhaps there was a better way?

Sorry not at this time. I think we want callbacks though, so feel
free to discuss and send patches. :)

Un= derstood. Thanks.

I haven't been using libssh2= long enough to feel comfortable enough in suggesting API improvements, sin= ce I haven't quite immersed myself in the "libssh2 way." But = I agree that callbacks would be fantastic.

Best,
Mitchell =A0
=A0


//Peter
_______________________________________________
libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/li= bssh2-devel

--f46d044788d93c705904ba1eba13-- --===============0572382192== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel --===============0572382192==-- From libssh2-devel-bounces@cool.haxx.se Wed Feb 29 22:33:18 2012 Return-Path: Received: from www.haxx.se (localhost.localdomain [127.0.0.1]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with ESMTP id q1TLWvRj024847; Wed, 29 Feb 2012 22:33:15 +0100 Received: from foo.stuge.se (qmailr@foo.stuge.se [212.116.89.98]) by giant.haxx.se (8.14.4/8.14.4/Debian-2) with SMTP id q1TLWt9r024829 for ; Wed, 29 Feb 2012 22:32:55 +0100 Received: (qmail 16169 invoked by uid 501); 29 Feb 2012 21:32:57 -0000 Message-ID: <20120229213257.16168.qmail@stuge.se> Date: Wed, 29 Feb 2012 22:32:57 +0100 From: Peter Stuge To: libssh2-devel@cool.haxx.se Subject: Re: Build fails on OpenSolaris Mail-Followup-To: libssh2-devel@cool.haxx.se References: <35797bd9fe8d03ceffb25140ea07b73e.squirrel@localhost> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <35797bd9fe8d03ceffb25140ea07b73e.squirrel@localhost> X-BeenThere: libssh2-devel@cool.haxx.se X-Mailman-Version: 2.1.14 Precedence: list Reply-To: libssh2 development List-Id: libssh2 development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: libssh2-devel-bounces@cool.haxx.se Sender: libssh2-devel-bounces@cool.haxx.se Tom Weber wrote: > The build of 1.4.0 fails in example/x11.c on OpenSolaris snv_89, since > that platform lacks cfmakeraw(). Fixed by http://git.libssh2.org/?p=libssh2.git;a=commitdiff;h=aa8f2cbf //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel