pidgin/pidgin

Implement SNI support for the gnutls SSL plugin.
release-2.x.y
2019-12-16, Mihai Moldovan
6dba8046e1b1
Implement SNI support for the gnutls SSL plugin.

Note that gnutls is picky in regard to what it accepts as the server name - it
MUST be a domain name. IP addresses are not supported according to the
documentation.

Hence, filter out IP addresses and hope that whatever is not recognized as
such an address is actually a domain name. This will probably fail for more
exotic addresses (especially in IPv6 realm), but wiring up a full-blown parser
is too much effort and SSL plugins are not part of purple-3 anyway.

Fixes #17300
/**
* @file gtkconn.h GTK+ Connection API
*/
/* pidgin
*
* Pidgin is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#ifndef _PIDGINCONN_H_
#define _PIDGINCONN_H_
/**************************************************************************/
/** @name GTK+ Connection API */
/**************************************************************************/
/*@{*/
/**
* Gets GTK+ Connection UI ops
*
* @return UI operations struct
*/
PurpleConnectionUiOps *pidgin_connections_get_ui_ops(void);
/*@}*/
/**
* Returns the GTK+ connection handle.
*
* @return The handle to the GTK+ connection system.
*/
void *pidgin_connection_get_handle(void);
/**
* Initializes the GTK+ connection system.
*/
void pidgin_connection_init(void);
/**
* Uninitializes the GTK+ connection system.
*/
void pidgin_connection_uninit(void);
#endif /* _PIDGINCONN_H_ */