pidgin/pidgin

facebook: Store sent message id in lastmid, to deduplicate echoed messages

2016-10-22, dequis
6d85d309f8e4
facebook: Store sent message id in lastmid, to deduplicate echoed messages

This is crappy and error prone, just like the rest of the duplicate
message handling code. It works, but it's going to get some echoes now
and then, particularly in quick moving groupchats.

I'm pretty sure this is a bug in the server, but the official clients
have much more elaborate deduplication built-in, so they won't notice.
/* 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_STUN_H_
#define _PURPLE_STUN_H_
/**
* SECTION:stun
* @section_id: libpurple-stun
* @short_description: <filename>stun.h</filename>
* @title: STUN API
*/
/******************************************************************************
* STUN API
*****************************************************************************/
typedef struct _PurpleStunNatDiscovery PurpleStunNatDiscovery;
/**
* PurpleStunStatus:
* @PURPLE_STUN_STATUS_UNDISCOVERED: No request has been published
* @PURPLE_STUN_STATUS_UNKNOWN: No STUN server reachable
* @PURPLE_STUN_STATUS_DISCOVERING: The request has been sent to the server
* @PURPLE_STUN_STATUS_DISCOVERED: The server has responded
*
* The status of a #PurpleStunNatDiscovery
*/
typedef enum {
PURPLE_STUN_STATUS_UNDISCOVERED = -1,
PURPLE_STUN_STATUS_UNKNOWN,
PURPLE_STUN_STATUS_DISCOVERING,
PURPLE_STUN_STATUS_DISCOVERED
} PurpleStunStatus;
/**
* PurpleStunNatType:
* @PURPLE_STUN_NAT_TYPE_PUBLIC_IP: No NAT
* @PURPLE_STUN_NAT_TYPE_UNKNOWN_NAT: NAT is unknown
* @PURPLE_STUN_NAT_TYPE_FULL_CONE: NAT is a full cone
* @PURPLE_STUN_NAT_TYPE_RESTRICTED_CONE: NAT is a restricted cone
* @PURPLE_STUN_NAT_TYPE_PORT_RESTRICTED_CONE: NAT is a port restricted cone
* @PURPLE_STUN_NAT_TYPE_SYMMETRIC: NAT is symmetric
*
* The type of NAT that was discovered.
*/
typedef enum {
PURPLE_STUN_NAT_TYPE_PUBLIC_IP,
PURPLE_STUN_NAT_TYPE_UNKNOWN_NAT,
PURPLE_STUN_NAT_TYPE_FULL_CONE,
PURPLE_STUN_NAT_TYPE_RESTRICTED_CONE,
PURPLE_STUN_NAT_TYPE_PORT_RESTRICTED_CONE,
PURPLE_STUN_NAT_TYPE_SYMMETRIC
} PurpleStunNatType;
/**
* PurpleStunNatDiscovery:
* @status: The #PurpleStunStatus
* @type: The #PurpleStunNatType
* @publicip: The public ip
* @servername: The name of the stun server
* @lookup_time: The time when the lookup occurred
*
* A data type representing a STUN lookup.
*/
struct _PurpleStunNatDiscovery {
PurpleStunStatus status;
PurpleStunNatType type;
char publicip[16];
char *servername;
time_t lookup_time;
};
typedef void (*PurpleStunCallback) (PurpleStunNatDiscovery *);
G_BEGIN_DECLS
/**
* purple_stun_discover:
* @cb: The callback to call when the STUN discovery is finished if the
* discovery would block. If the discovery is done, this is NOT
* called.
*
* Starts a NAT discovery. It returns a PurpleStunNatDiscovery if the discovery
* is already done. Otherwise the callback is called when the discovery is over
* and NULL is returned.
*
* Returns: a #PurpleStunNatDiscovery which includes the public IP and the type
* of NAT or NULL if discovery would block
*/
PurpleStunNatDiscovery *purple_stun_discover(PurpleStunCallback cb);
void purple_stun_init(void);
G_END_DECLS
#endif /* _PURPLE_STUN_H_ */