Bugs item #1826989, was opened at 2007-11-06 16:50
Message generated for change (Comment added) made by tonyspoken
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Category: SFTP
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: antonio (tonyspoken)
Assigned to: Nobody/Anonymous (nobody)
Summary: libssh2_sftp_readdir() hangs forever
Initial Comment:
An abnormal situation of hanging is noted when doing a remote dir read on a particular directory with the ibssh2_sftp_readdir_ex().
In attach the complete stdout log.
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>Comment By: antonio (tonyspoken)
Date: 2007-11-07 14:25
Message:
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I'm further investigating this problem.
I got one interesting thing from logs and network snoops.
The problem seems connected to the amount of datas we're grabbing from the
network.
In particular after calling libssh2_sftp_readdir() the SSH server is
responding us with a 4100 bytes packet, that from libssh2 point of view is
got in two different stages (4096 bytes raw data + further 4 bytes raw
data, as can be seen from the logs) because 4096 is the actual fixed
dimension of the chunk size, as defined in lissh2_priv.h (PACKETBUFSIZE).
The faulty and hanging situation is not appearing anynmore in two
different cases:
- for example if we add a new file in the directory
- we change the PACKETBUFSIZE value
Both of the two options leads to a change in the number of bytes actually
exchanged between server and client (for example when adding a new file in
the remote directory to be ls-ed, the received 4100 bytes returned from SSH
server became 4196, and everything went fine).
I can deep analyze it more, but probably someone who's inside the
transport and packet routines could speed up things a lot.
Any help is appreciated.
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Received on 2007-11-07