Hello, I am trying to implement my own file transfer protocol and encountered a problem when client or server is connected via libssh2 (the protocol works flawlessly on "normal" network).
I am writing small amounts of data (not more than 4096 bytes) to ssh channel, using libssh2_channel_write_ex. Up to 2Mb sent, the function returns actual bytes written. But around 2Mb (the boundary is not constant, but it fails around 2093051, 2080764, 2083684 or 2092906) it begins returning 0 and of course - no data reaches destination. If I transfer a file that is a bit smaller than 2Mb - it goes through, the channel gets OK response and I can send another less than 2Mb file (it seems that reading my protocol's "OK" message from ssh channel somehow unclogs it...) I googled around for "libssh2" and "2097152" finding several posts describing, I guess, similar problem. This may be also connected with windows RDP protocol forwarded via libssh2_channel_forward_listen_ex problem. I can connect to forwarded channel and log in, but as soon as I log in and a huge amount of data (current remote screen) is to be written to libssh channel, the connection hangs - surely there's more than 2Mb of data written to the channel... Is this a bug, a feature or am I just doing something wrong? Regards, Przemek.
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