Mercurial > hg
view mcabber/libjabber/pproxy.c @ 853:bdd526ec62bc
Fix segfault when using /group with the [status] entry
This patch fixes the segfault reported by pmw in the mcabber conference room.
author | Mikael Berthe <mikael@lilotux.net> |
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date | Sat, 13 May 2006 22:21:20 +0200 |
parents | c3ae9251c197 |
children |
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/* * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Copyrights * * Portions created by or assigned to Jabber.com, Inc. are * Copyright (c) 1999-2002 Jabber.com, Inc. All Rights Reserved. Contact * information for Jabber.com, Inc. is available at http://www.jabber.com/. * * Portions Copyright (c) 1998-1999 Jeremie Miller. * * Acknowledgements * * Special thanks to the Jabber Open Source Contributors for their * suggestions and support of Jabber. * * */ /** * @file pproxy.c * @brief presence proxy database - DEPRECATED * * @deprecated these functions are not used by jabberd itself (but aim-t uses them), they will be removed from jabberd * * The presence proxy database is used to store presences for different resources of a JID. * * these aren't the most efficient things in the world, a hash optimized for tiny spaces would be far better */ #include "jabber.h" /* these aren't the most efficient things in the world, a hash optimized for tiny spaces would be far better */ ppdb _ppdb_new(pool p, jid id) { ppdb ret; ret = pmalloc(p,sizeof(_ppdb)); ret->p = p; ret->pri = -1; ret->next = NULL; ret->user = NULL; ret->x = NULL; ret->id = jid_new(p,jid_full(id)); return ret; } ppdb _ppdb_get(ppdb db, jid id) { ppdb cur; if(db == NULL || id == NULL) return NULL; for(cur = db->next; cur != NULL; cur = cur->next) if(jid_cmp(cur->id,id) == 0) return cur; return NULL; } ppdb ppdb_insert(ppdb db, jid id, xmlnode x) { ppdb cur, curu; pool p; if(id == NULL || id->server == NULL || x == NULL) return db; /* new ppdb list dummy holder */ if(db == NULL) { p = pool_heap(1024); db = _ppdb_new(p,NULL); } cur = _ppdb_get(db,id); /* just update it */ if(cur != NULL) { xmlnode_free(cur->x); cur->x = xmlnode_dup(x); cur->pri = jutil_priority(x); return db; } /* make an entry for it */ cur = _ppdb_new(db->p,id); cur->x = xmlnode_dup(x); cur->pri = jutil_priority(x); cur->next = db->next; db->next = cur; /* if this is a user's resource presence, get the the user entry */ if(id->user != NULL && (curu = _ppdb_get(db,jid_user(id))) != cur) { /* no user entry, make one */ if(curu == NULL) { curu = _ppdb_new(db->p,jid_user(id)); curu->next = db->next; db->next = curu; } /* insert this resource into the user list */ cur->user = curu->user; curu->user = cur; } return db; } xmlnode ppdb_primary(ppdb db, jid id) { ppdb cur, top; if(db == NULL || id == NULL) return NULL; cur = _ppdb_get(db,id); if(cur == NULL) return NULL; /* not user@host check, just return */ if(id->user == NULL || id->resource != NULL) return cur->x; top = cur; for(cur = cur->user; cur != NULL; cur = cur->user) if(cur->pri >= top->pri) top = cur; if(top != NULL && top->pri >= 0) return top->x; return NULL; } /* return the presence for the id, successive calls return all of the known resources for a user@host address */ xmlnode ppdb_get(ppdb db, jid id) { static ppdb last = NULL; ppdb cur; if(db == NULL || id == NULL) return NULL; /* MODE: if this is NOT just user@host addy, return just the single entry */ if(id->user == NULL || id->resource != NULL) { /* we were just here, return now */ if(last != NULL) { last = NULL; return NULL; } last = _ppdb_get(db,id); if(last != NULL) return last->x; else return NULL; } /* handle looping for user@host */ /* we're already in the loop */ if(last != NULL) { /* this is the last entry in the list */ if(last->user == NULL) { last = NULL; return NULL; } last = last->user; return last->x; } /* start a new loop */ cur = _ppdb_get(db,id); if(cur == NULL) return NULL; last = cur->user; if(last != NULL) return last->x; else return NULL; } void ppdb_free(ppdb db) { ppdb cur; if(db == NULL) return; for(cur = db; cur != NULL; cur = cur->next) xmlnode_free(cur->x); pool_free(db->p); }