single_connection - non-zero to only forward a single connection.
auth_proto - X11 authentication protocol to use
auth_cookie - the cookie (hexadecimal encoded).
screen_number - the XLL screen to forward
Request an X11 forwarding on channel. To use X11 forwarding,
libssh2_session_callback_set(3)
must first be called to set LIBSSH2_CALLBACK_X11. This callback will be
invoked when the remote host accepts the X11 forwarding.
RETURN VALUE
Return 0 on success or negative on failure. It returns
LIBSSH2_ERROR_EAGAIN when it would otherwise block. While
LIBSSH2_ERROR_EAGAIN is a negative number, it isn't really a failure per se.
ERRORS
LIBSSH2_ERROR_ALLOC - An internal memory allocation call failed.
LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.