On Wed, 6 Oct 2010, Daniel Stenberg wrote:
I'll get myself a dropbear install and see if I can repeat this. Is uploading data with a 128K buffer enough to trigger it? Like with the sftp_write_nonblock.c example?
I installed dropbear and I managed to repeat a problem when uploading to it, but it was due to dropbear's maximum SSH packet size limit at 32768 bytes. Once I fixed that I could upload fine using the scp_write_nonblock example, which uses 100K buffers. I tried dropbear with default window (24576) and with 200000, both worked fine. (My change is pushed, together with a bunch of other cleanups in the error code department.)
To fix the problem, I had to once again do a rather lame fix in _libssh2_channel_write() to limit the amount of data it passes on to transport_write(). I'm slowly starting to build up motivation for myself to start working on a rather major internal overhaul regarding how we deal with buffers/packets when sending data. More about that later on.
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