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 version.h Purple Versioning
*
* purple
*
* Purple 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 _PURPLE_VERSION_H_
#define _PURPLE_VERSION_H_
/** The major version of the running libpurple. */
#define PURPLE_MAJOR_VERSION (@PURPLE_MAJOR_VERSION@)
/** The minor version of the running libpurple. */
#define PURPLE_MINOR_VERSION (@PURPLE_MINOR_VERSION@)
/** The micro version of the running libpurple. */
#define PURPLE_MICRO_VERSION (@PURPLE_MICRO_VERSION@)
#define PURPLE_VERSION_CHECK(x,y,z) ((x) == PURPLE_MAJOR_VERSION && \
((y) < PURPLE_MINOR_VERSION || \
((y) == PURPLE_MINOR_VERSION && (z) <= PURPLE_MICRO_VERSION)))
#ifdef __cplusplus
extern "C" {
#endif
/**
* Checks that the libpurple version is compatible with the requested
* version
*
* @param required_major: the required major version.
* @param required_minor: the required minor version.
* @param required_micro: the required micro version.
*
* @return NULL if the versions are compatible, or a string describing
* the version mismatch if not compatible.
*/
const char *purple_version_check(guint required_major, guint required_minor, guint required_micro);
/**
* The major version of the running libpurple. Contrast with
* #PURPLE_MAJOR_VERSION, which expands at compile time to the major version of
* libpurple being compiled against.
*
* @since 2.4.0
*/
extern const guint purple_major_version;
/**
* The minor version of the running libpurple. Contrast with
* #PURPLE_MINOR_VERSION, which expands at compile time to the minor version of
* libpurple being compiled against.
*
* @since 2.4.0
*/
extern const guint purple_minor_version;
/**
*
* The micro version of the running libpurple. Contrast with
* #PURPLE_MICRO_VERSION, which expands at compile time to the micro version of
* libpurple being compiled against.
*
* @since 2.4.0
*/
extern const guint purple_micro_version;
#ifdef __cplusplus
}
#endif
#endif /* _PURPLE_VERSION_H_ */