Try writing again to the channel if LIBSSH2_ERROR_EAGAIN is returned. #3
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| @@ -106,7 +106,10 @@ int forward_tunnel(LIBSSH2_SESSION *session, LIBSSH2_CHANNEL *channel) { | |||
| } | |||
| wr = 0; | |||
| do { | |||
| i = libssh2_channel_write(channel, buf, len); | |||
| i = LIBSSH2_ERROR_EAGAIN; | |||
| while (i == LIBSSH2_ERROR_EAGAIN) { | |||
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This can cause an infinite loop, blocking the tunnel on write.
The correct way to handle this is to check if the socket is alive before sending it again: https://stackoverflow.com/a/9811061/2052076
Some code examples that I found:
https://github.com/allisrc/libgit2-allisrc/blob/62ab0e1fc2a471db960b0bd881aab116b350a961/src/transports/ssh.c#L266
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If
LIBSSH2_ERROR_EAGAINis returned forlibssh2_channel_write, retry writing the data.