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.\" Copyright (C) The libssh2 project and its contributors.
.\" SPDX-License-Identifier: BSD-3-Clause
.TH libssh2_channel_x11_req_ex 3 "1 Jun 2007" "libssh2 0.15" "libssh2"
.SH NAME
libssh2_channel_x11_req_ex - request an X11 forwarding channel
.SH SYNOPSIS
.nf
#include <libssh2.h>

int
libssh2_channel_x11_req_ex(LIBSSH2_CHANNEL *channel, int single_connection,
                           const char *auth_proto, const char *auth_cookie,
                           int screen_number);

int
libssh2_channel_x11_req(LIBSSH2_CHANNEL *channel,
                        int screen_number);
.fi
.SH DESCRIPTION
\fIchannel\fP - Previously opened channel instance such as returned by
.BR libssh2_channel_open_ex(3)

\fIsingle_connection\fP - non-zero to only forward a single connection.

\fIauth_proto\fP - X11 authentication protocol to use

\fIauth_cookie\fP - the cookie (hexadecimal encoded).

\fIscreen_number\fP - the XLL screen to forward

Request an X11 forwarding on \fIchannel\fP. To use X11 forwarding,
.BR libssh2_session_callback_set2(3)
must first be called to set \fBLIBSSH2_CALLBACK_X11\fP. This callback will be
invoked when the remote host accepts the X11 forwarding.
.SH 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 is not really a failure per se.
.SH ERRORS
\fILIBSSH2_ERROR_ALLOC\fP - An internal memory allocation call failed.

\fILIBSSH2_ERROR_SOCKET_SEND\fP - Unable to send data on socket.

\fILIBSSH2_ERROR_CHANNEL_REQUEST_DENIED\fP -
.SH SEE ALSO
.BR libssh2_channel_open_ex(3)
.BR libssh2_session_callback_set2(3)