src/sipe-dialog.c

   1 /**
   2  * @file sipe-dialog.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2009 SIPE Project <http://sipe.sourceforge.net/>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include <string.h>
  24 #include <glib.h>
  25
  26 #include "debug.h"
  27
  28 #include "sipe.h"
  29 #include "sipe-dialog.h"
  30 #include "sipe-session.h"
  31 #include "sipmsg.h"
  32
  33 void sipe_dialog_free(struct sip_dialog *dialog)
  34 {
  35         GSList *entry;
  36
  37         if (!dialog) return;
  38
  39         g_free(dialog->with);
  40         g_free(dialog->endpoint_GUID);
  41         entry = dialog->routes;
  42         while (entry) {
  43                 g_free(entry->data);
  44                 entry = g_slist_remove(entry, entry->data);
  45         }
  46         entry = dialog->supported;
  47         while (entry) {
  48                 g_free(entry->data);
  49                 entry = g_slist_remove(entry, entry->data);
  50         }
  51
  52         g_free(dialog->callid);
  53         g_free(dialog->ourtag);
  54         g_free(dialog->theirtag);
  55         g_free(dialog->theirepid);
  56         g_free(dialog->request);
  57
  58         g_free(dialog);
  59 }
  60
  61 struct sip_dialog *sipe_dialog_add(struct sip_session *session)
  62 {
  63         struct sip_dialog *dialog = g_new0(struct sip_dialog, 1);
  64         session->dialogs = g_slist_append(session->dialogs, dialog);
  65         return(dialog);
  66 }
  67
  68 struct sip_dialog *sipe_dialog_find(struct sip_session *session,
  69                                     const gchar *who)
  70 {
  71         if (session && who) {
  72                 SIPE_DIALOG_FOREACH {
  73                         if (dialog->with && !g_ascii_strcasecmp(who, dialog->with)) {
  74                                 return dialog;
  75                         }
  76                 } SIPE_DIALOG_FOREACH_END;
  77         }
  78         return NULL;
  79 }
  80
  81 void sipe_dialog_remove(struct sip_session *session, const gchar *who)
  82 {
  83         struct sip_dialog *dialog = sipe_dialog_find(session, who);
  84         if (dialog) {
  85                 session->dialogs = g_slist_remove(session->dialogs, dialog);
  86                 sipe_dialog_free(dialog);
  87         }
  88 }
  89
  90 void sipe_dialog_remove_all(struct sip_session *session)
  91 {
  92         GSList *entry = session->dialogs;
  93         while (entry) {
  94                 sipe_dialog_free(entry->data);
  95                 entry = g_slist_remove(entry, entry->data);
  96         }
  97 }
  98
  99 static void sipe_get_route_header(const struct sipmsg *msg,
 100                                   struct sip_dialog *dialog,
 101                                   gboolean outgoing)
 102 {
 103         GSList *hdr = msg->headers;
 104         gchar *contact;
 105
 106         while (hdr) {
 107                 struct siphdrelement *elem = hdr->data;
 108                 if(!g_ascii_strcasecmp(elem->name, "Record-Route")) {
 109                         gchar **parts = g_strsplit(elem->value, ",", 0);
 110                         gchar **part = parts;
 111
 112                         while (*part) {
 113                                 gchar *route = sipmsg_find_part_of_header(*part, "<", ">", NULL);
 114                                 purple_debug_info("sipe", "sipe_get_route_header: route %s \n", route);
 115                                 dialog->routes = g_slist_append(dialog->routes, route);
 116                                 part++;
 117                         }
 118
 119                         g_strfreev(parts);
 120                 }
 121                 hdr = g_slist_next(hdr);
 122         }
 123
 124         if (outgoing) {
 125                 dialog->routes = g_slist_reverse(dialog->routes);
 126         }
 127
 128         if (dialog->routes) {
 129                 dialog->request = dialog->routes->data;
 130                 dialog->routes = g_slist_remove(dialog->routes, dialog->routes->data);
 131         }
 132
 133         contact = sipmsg_find_part_of_header(sipmsg_find_header(msg, "Contact"), "<", ">", NULL);
 134         if (contact) {
 135                 dialog->routes = g_slist_append(dialog->routes, contact);
 136         }
 137 }
 138
 139 static void
 140 sipe_get_supported_header(const struct sipmsg *msg,
 141                           struct sip_dialog *dialog,
 142                           SIPE_UNUSED_PARAMETER gboolean outgoing)
 143 {
 144         GSList *hdr = msg->headers;
 145         struct siphdrelement *elem;
 146         while(hdr)
 147         {
 148                 elem = hdr->data;
 149                 if(!g_ascii_strcasecmp(elem->name, "Supported")
 150                         && !g_slist_find_custom(dialog->supported, elem->value, (GCompareFunc)g_ascii_strcasecmp))
 151                 {
 152                         dialog->supported = g_slist_append(dialog->supported, g_strdup(elem->value));
 153
 154                 }
 155                 hdr = g_slist_next(hdr);
 156         }
 157 }
 158
 159 static gchar *find_tag(const gchar *hdr)
 160 {
 161         gchar * tag = sipmsg_find_part_of_header (hdr, "tag=", ";", NULL);
 162         if (!tag) {
 163                 // In case it's at the end and there's no trailing ;
 164                 tag = sipmsg_find_part_of_header (hdr, "tag=", NULL, NULL);
 165         }
 166         return tag;
 167 }
 168
 169 void sipe_dialog_parse(struct sip_dialog *dialog,
 170                        const struct sipmsg *msg,
 171                        gboolean outgoing)
 172 {
 173         gchar *us = outgoing ? "From" : "To";
 174         gchar *them = outgoing ? "To" : "From";
 175
 176         g_free(dialog->ourtag);
 177         g_free(dialog->theirtag);
 178
 179         dialog->ourtag = find_tag(sipmsg_find_header(msg, us));
 180         dialog->theirtag = find_tag(sipmsg_find_header(msg, them));
 181         if (!dialog->theirepid) {
 182                 dialog->theirepid = sipmsg_find_part_of_header(sipmsg_find_header(msg, them), "epid=", ";", NULL);
 183                 if (!dialog->theirepid) {
 184                         dialog->theirepid = sipmsg_find_part_of_header(sipmsg_find_header(msg, them), "epid=", NULL, NULL);
 185                 }
 186         }
 187
 188         // Catch a tag on the end of the To Header and get rid of it.
 189         if (dialog->theirepid && strstr(dialog->theirepid, "tag=")) {
 190                 dialog->theirepid = strtok(dialog->theirepid, ";");
 191         }
 192
 193         sipe_get_route_header(msg, dialog, outgoing);
 194         sipe_get_supported_header(msg, dialog, outgoing);
 195 }
 196
 197 /*
 198   Local Variables:
 199   mode: c
 200   c-file-style: "bsd"
 201   indent-tabs-mode: t
 202   tab-width: 8
 203   End:
 204 */