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 pidgin.h UI definitions and includes
* @ingroup pidgin
*/
/* 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
*/
/* #warning ***pidgin*** */
#ifndef _PIDGIN_H_
#define _PIDGIN_H_
#include <gtk/gtk.h>
#ifdef GDK_WINDOWING_X11
# include <gdk/gdkx.h>
#endif
#ifdef _WIN32
# include "gtkwin32dep.h"
#endif
/**
* Our UI's identifier.
*/
/* leave this as gtk-gaim until we have a decent way to migrate UI-prefs */
#define PIDGIN_UI "gtk-gaim"
/* change this only when we have a sane upgrade path for old prefs */
#define PIDGIN_PREFS_ROOT "/pidgin"
/* Translators may want to transliterate the name.
It is not to be translated. */
#define PIDGIN_NAME _("Pidgin")
#ifndef _WIN32
# define PIDGIN_ALERT_TITLE ""
#else
# define PIDGIN_ALERT_TITLE PIDGIN_NAME
#endif
/*
* Spacings between components, as defined by the
* GNOME Human Interface Guidelines.
*/
#define PIDGIN_HIG_CAT_SPACE 18
#define PIDGIN_HIG_BORDER 12
#define PIDGIN_HIG_BOX_SPACE 6
#if !GTK_CHECK_VERSION(2,16,0) || !defined(PIDGIN_DISABLE_DEPRECATED)
/*
* Older versions of GNOME defaulted to using an asterisk as the invisible
* character. But this is ugly and we want to use something nicer.
*
* The default invisible character was changed in GNOME revision 21446
* (GTK+ 2.16) from an asterisk to the first available character out of
* 0x25cf, 0x2022, 0x2731, 0x273a. See GNOME bugs 83935 and 307304 for
* discussion leading up to the change.
*
* Here's the change:
* http://svn.gnome.org/viewvc/gtk%2B?view=revision&revision=21446
*
*/
#define PIDGIN_INVISIBLE_CHAR (gunichar)0x25cf
#endif /* Less than GTK+ 2.16 */
#endif /* _PIDGIN_H_ */