@brief SSH channel data callback. Called when data is available on a channel
@param session Current session handler
@param channel the actual channel
@param data the data that has been read on the channel
@param len the length of the data
@param is_stderr is 0 for stdout or 1 for stderr
@param userdata Userdata to be passed to the callback function.
@returns number of bytes processed by the callee. The remaining bytes will
be sent in the next callback message, when more data is available.
@brief SSH channel data callback. Called when data is available on a channel @param session Current session handler @param channel the actual channel @param data the data that has been read on the channel @param len the length of the data @param is_stderr is 0 for stdout or 1 for stderr @param userdata Userdata to be passed to the callback function. @returns number of bytes processed by the callee. The remaining bytes will be sent in the next callback message, when more data is available.