Hello everyone, I was wondering if you could help me debug a problem I'm having when using libssh2. If I try to read a file using libssh2_sftp_read with a small buffer (e.g. 4K) it works fine. However, if I try to use a large one (e.g. 6M - I think even 500K triggers the problem though) the call fails and gives me the generic timeout-waiting-for-a-packet error message.
I've tracked down the failure to a call to libssh2_sftp_packet_read from the libssh2_sftp_packet_requirev function (line 371, sftp.c, latest CVS). Inside this call it fails with an "SFTP packet too large" message (line 173). (I've noticed that the packet_len is 0x67000000 (1728053248) but I'm not sure maybe that's relevant.) Having traced the execution in the working case and compared it to the failing case, the first difference I could identify was the call to libssh2_sftp_packet_ask on line 359 returns -1 only in the failing case. This happens because packet (assigned on line 240) is null and therefore the entire while loop starting at 263 is skipped. Apologies for the brain-dump but I'm not familiar enough with libssh2 to explain *why* this is happening - just *what* is happening. I hope someone has a better idea of what's going on. I've read elsewhere in the mailing list that libssh2_sftp_read should be called with a buffer as big as the file itself in order to maximise performance so I don't think I'm just calling it incorrectly. My platform is: Windows XP Visual Studio 2005 A recent SDK libssh2-CVS-HEAD linked with OpenSSL 0.9.8g Connecting to: Ubuntu Hardy/Intrepid OpenSSH 5.1p1 linked with OpenSSH 0.9.8g Your help is greatly appreciated (and may contribute to a very useful piece of software for any Windows users ;) ) Alex Swish (http://swish.sourceforge.net) ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ libssh2-devel mailing list libssh2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libssh2-devel
