#214: sftp_write hangs following an error
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Reporter: mts | Owner: bagder
Type: defect | Status: assigned
Priority: normal | Milestone: 1.2.9
Component: SFTP | Version: 1.2.8
Resolution: | Keywords: sftp write hang
Blocks: | Blocked By:
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Changes (by bagder):
* owner: => bagder
* status: new => assigned
Comment:
Ok, a question and some comments around what we see in the trace:
We see that we get a 101 (hex 65) response back from the server when
FXP_WRITE was sent. The following log snippet shows this:
[libssh2] 6.738287 SFTP: Received packet 101 (len 24)
[libssh2] 6.738287 SFTP: Got 101
[libssh2] 6.738287 Failure Event: -31 - FXP write failed
Ok, and the last line there is a call to _libssh2_error() and a return out
from sftp_write() with LIBSSH2_ERROR_SFTP_PROTOCOL as error.
when sftp_write() returns, it goes back to the libssh2_sftp_write()
function where there's a macro that checks if it should hang around and
wait for more data or not. This macro would not match the
LIBSSH2_ERROR_SFTP_PROTOCOL return code but should return immediately.
However, the next trace log shows:
[libssh2] 50.989703 SFTP: Requiring packet 101 id 80
Is that a new call to libssh2_sftp_write() after the previous one failed?
I think so, and it would be great to get this confirmed to properly
understand what's going on.
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Ticket URL: <http://trac.libssh2.org/ticket/214#comment:3>
libssh2 <http://trac.libssh2.org/>
C library for writing portable SSH2 clients
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