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 gntplugin.h GNT Plugins API
* @ingroup finch
*/
/* finch
*
* Finch 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 _GNT_PLUGIN_H
#define _GNT_PLUGIN_H
#include <gnt.h>
#include <plugin.h>
#include <pluginpref.h>
#include <string.h>
#include "finch.h"
/**********************************************************************
* @name GNT Plugins API
**********************************************************************/
/*@{*/
typedef GntWidget* (*FinchPluginFrame) (void);
/* Guess where these came from */
#define FINCH_PLUGIN_TYPE FINCH_UI
/**
* Decide whether a plugin is a GNT-plugin.
*/
#define PURPLE_IS_GNT_PLUGIN(plugin) \
((plugin)->info != NULL && (plugin)->info->ui_info != NULL && \
purple_strequal((plugin)->info->ui_requirement, FINCH_PLUGIN_TYPE))
/**
* Get the ui-info from GNT-plugins.
*/
#define FINCH_PLUGIN_UI_INFO(plugin) \
(FinchPluginFrame)((plugin)->info->ui_info)
/**
* Show a list of plugins.
*/
void finch_plugins_show_all(void);
/**
* Save the list of loaded plugins.
*/
void finch_plugins_save_loaded(void);
/*@}*/
#endif