src/core/sipe-dialog.c

   1 /**
   2  * @file sipe-dialog.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2009-11 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 <stdlib.h>
  24 #include <string.h>
  25 #include <time.h>
  26
  27 #include <glib.h>
  28
  29 #include "sipe-core.h"
  30 #include "sipe-common.h"
  31 #include "sipmsg.h"
  32 #include "sipe-backend.h"
  33 #include "sipe-dialog.h"
  34 #include "sipe-session.h"
  35 #include "sipe-utils.h"
  36
  37 void sipe_dialog_free(struct sip_dialog *dialog)
  38 {
  39         GSList *entry;
  40         void *data;
  41
  42         if (!dialog) return;
  43
  44         g_free(dialog->with);
  45         g_free(dialog->endpoint_GUID);
  46         entry = dialog->routes;
  47         while (entry) {
  48                 data = entry->data;
  49                 entry = g_slist_remove(entry, data);
  50                 g_free(data);
  51         }
  52         entry = dialog->supported;
  53         while (entry) {
  54                 data = entry->data;
  55                 entry = g_slist_remove(entry, data);
  56                 g_free(data);
  57         }
  58
  59         while (dialog->filetransfers) {
  60                 struct sipe_file_transfer *ft = dialog->filetransfers->data;
  61                 sipe_core_ft_deallocate(ft);
  62         }
  63
  64         g_free(dialog->callid);
  65         g_free(dialog->ourtag);
  66         g_free(dialog->theirtag);
  67         g_free(dialog->theirepid);
  68         g_free(dialog->request);
  69
  70         g_free(dialog);
  71 }
  72
  73 struct sip_dialog *sipe_dialog_add(struct sip_session *session)
  74 {
  75         struct sip_dialog *dialog = g_new0(struct sip_dialog, 1);
  76         session->dialogs = g_slist_append(session->dialogs, dialog);
  77         return(dialog);
  78 }
  79
  80 static struct sip_dialog *
  81 sipe_dialog_find_3(struct sip_session *session,
  82                    struct sip_dialog *dialog_in)
  83 {
  84         if (session && dialog_in) {
  85                 SIPE_DIALOG_FOREACH {
  86                         if (    dialog_in->callid &&
  87                                 dialog_in->ourtag &&
  88                                 dialog_in->theirtag &&
  89
  90                                 dialog->callid &&
  91                                 dialog->ourtag &&
  92                                 dialog->theirtag &&
  93
  94                                 sipe_strcase_equal(dialog_in->callid, dialog->callid) &&
  95                                 sipe_strcase_equal(dialog_in->ourtag, dialog->ourtag) &&
  96                                 sipe_strcase_equal(dialog_in->theirtag, dialog->theirtag))
  97                         {
  98                                 SIPE_DEBUG_INFO("sipe_dialog_find_3 who='%s'",
  99                                                 dialog->with ? dialog->with : "");
 100                                 return dialog;
 101                         }
 102                 } SIPE_DIALOG_FOREACH_END;
 103         }
 104         return NULL;
 105 }
 106
 107 struct sip_dialog *sipe_dialog_find(struct sip_session *session,
 108                                     const gchar *who)
 109 {
 110         if (session && who) {
 111                 SIPE_DIALOG_FOREACH {
 112                         if (dialog->with && sipe_strcase_equal(who, dialog->with)) {
 113                                 SIPE_DEBUG_INFO("sipe_dialog_find who='%s'", who);
 114                                 return dialog;
 115                         }
 116                 } SIPE_DIALOG_FOREACH_END;
 117         }
 118         return NULL;
 119 }
 120
 121 void sipe_dialog_remove(struct sip_session *session, const gchar *who)
 122 {
 123         struct sip_dialog *dialog = sipe_dialog_find(session, who);
 124         if (dialog) {
 125                 SIPE_DEBUG_INFO("sipe_dialog_remove who='%s' with='%s'", who, dialog->with ? dialog->with : "");
 126                 session->dialogs = g_slist_remove(session->dialogs, dialog);
 127                 sipe_dialog_free(dialog);
 128         }
 129 }
 130
 131 void
 132 sipe_dialog_remove_3(struct sip_session *session,
 133                      struct sip_dialog *dialog_in)
 134 {
 135         struct sip_dialog *dialog = sipe_dialog_find_3(session, dialog_in);
 136         if (dialog) {
 137                 SIPE_DEBUG_INFO("sipe_dialog_remove_3 with='%s'",
 138                                 dialog->with ? dialog->with : "");
 139                 session->dialogs = g_slist_remove(session->dialogs, dialog);
 140                 sipe_dialog_free(dialog);
 141         }
 142 }
 143
 144 void sipe_dialog_remove_all(struct sip_session *session)
 145 {
 146         GSList *entry = session->dialogs;
 147         while (entry) {
 148                 struct sip_dialog *dialog = entry->data;
 149                 entry = g_slist_remove(entry, dialog);
 150                 sipe_dialog_free(dialog);
 151         }
 152 }
 153
 154 static void sipe_dialog_parse_routes(struct sip_dialog *dialog,
 155                                      const struct sipmsg *msg,
 156                                      gboolean outgoing)
 157 {
 158         GSList *hdr = msg->headers;
 159         gchar *contact = sipmsg_find_part_of_header(sipmsg_find_header(msg, "Contact"), "<", ">", NULL);
 160
 161         /* Remove old routes */
 162         while (dialog->routes) {
 163                 void *data = dialog->routes->data;
 164                 dialog->routes = g_slist_remove(dialog->routes, data);
 165                 g_free(data);
 166         }
 167         g_free(dialog->request);
 168         dialog->request = NULL;
 169
 170         while (hdr) {
 171                 struct sipnameval *elem = hdr->data;
 172                 if (sipe_strcase_equal(elem->name, "Record-Route")) {
 173                         gchar **parts = g_strsplit(elem->value, ",", 0);
 174                         gchar **part = parts;
 175
 176                         while (*part) {
 177                                 SIPE_DEBUG_INFO("sipe_dialog_parse_routes: route %s", *part);
 178                                 dialog->routes = g_slist_append(dialog->routes,
 179                                                                 g_strdup(*part));
 180                                 part++;
 181                         }
 182                         g_strfreev(parts);
 183                 }
 184                 hdr = g_slist_next(hdr);
 185         }
 186         if (outgoing) {
 187                 dialog->routes = g_slist_reverse(dialog->routes);
 188         }
 189
 190         if (contact) {
 191                 dialog->request = contact;
 192         }
 193
 194         /* logic for strict router only - RFC3261 - 12.2.1.1 */
 195         /* @TODO: proper check for presence of 'lr' PARAMETER in URI */
 196         if (dialog->routes && !strstr(dialog->routes->data, ";lr")) {
 197                 gchar *route = dialog->routes->data;
 198                 dialog->request = sipmsg_find_part_of_header(route, "<", ">", NULL);
 199                 SIPE_DEBUG_INFO("sipe_dialog_parse_routes: strict route, contact %s", dialog->request);
 200                 dialog->routes = g_slist_remove(dialog->routes, route);
 201                 g_free(route);
 202                 if (contact) {
 203                         dialog->routes = g_slist_append(dialog->routes,
 204                                                         g_strdup_printf("<%s>", contact));
 205                         g_free(contact);
 206                 }
 207         }
 208 }
 209
 210 static void
 211 sipe_get_supported_header(const struct sipmsg *msg,
 212                           struct sip_dialog *dialog,
 213                           SIPE_UNUSED_PARAMETER gboolean outgoing)
 214 {
 215         GSList *hdr = msg->headers;
 216         struct sipnameval *elem;
 217         while(hdr)
 218         {
 219                 elem = hdr->data;
 220                 if (sipe_strcase_equal(elem->name, "Supported")
 221                         && !g_slist_find_custom(dialog->supported, elem->value, (GCompareFunc)g_ascii_strcasecmp))
 222                 {
 223                         dialog->supported = g_slist_append(dialog->supported, g_strdup(elem->value));
 224
 225                 }
 226                 hdr = g_slist_next(hdr);
 227         }
 228 }
 229
 230 static gchar *find_tag(const gchar *hdr)
 231 {
 232         gchar * tag = sipmsg_find_part_of_header (hdr, "tag=", ";", NULL);
 233         if (!tag) {
 234                 // In case it's at the end and there's no trailing ;
 235                 tag = sipmsg_find_part_of_header (hdr, "tag=", NULL, NULL);
 236         }
 237         return tag;
 238 }
 239
 240 void sipe_dialog_parse(struct sip_dialog *dialog,
 241                        const struct sipmsg *msg,
 242                        gboolean outgoing)
 243 {
 244         gchar *us = outgoing ? "From" : "To";
 245         gchar *them = outgoing ? "To" : "From";
 246         const gchar *session_expires_header;
 247
 248         g_free(dialog->ourtag);
 249         g_free(dialog->theirtag);
 250
 251         dialog->ourtag = find_tag(sipmsg_find_header(msg, us));
 252         dialog->theirtag = find_tag(sipmsg_find_header(msg, them));
 253         if (!dialog->theirepid) {
 254                 dialog->theirepid = sipmsg_find_part_of_header(sipmsg_find_header(msg, them), "epid=", ";", NULL);
 255                 if (!dialog->theirepid) {
 256                         dialog->theirepid = sipmsg_find_part_of_header(sipmsg_find_header(msg, them), "epid=", NULL, NULL);
 257                 }
 258         }
 259
 260         // Catch a tag on the end of the To Header and get rid of it.
 261         if (dialog->theirepid && strstr(dialog->theirepid, "tag=")) {
 262                 dialog->theirepid = strtok(dialog->theirepid, ";");
 263         }
 264
 265         if ((session_expires_header = sipmsg_find_header(msg, "Session-Expires"))) {
 266                 dialog->expires = atoi(session_expires_header);
 267         }
 268
 269         sipe_dialog_parse_routes(dialog, msg, outgoing);
 270         sipe_get_supported_header(msg, dialog, outgoing);
 271 }
 272
 273 /*
 274   Local Variables:
 275   mode: c
 276   c-file-style: "bsd"
 277   indent-tabs-mode: t
 278   tab-width: 8
 279   End:
 280 */