src/core/sipe-dialog.c

   1 /**
   2  * @file sipe-dialog.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2009-2015 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 "sipe-ft.h"
  32 #include "sipmsg.h"
  33 #include "sipe-backend.h"
  34 #include "sipe-dialog.h"
  35 #include "sipe-session.h"
  36 #include "sipe-utils.h"
  37
  38 void sipe_dialog_free(struct sip_dialog *dialog)
  39 {
  40         GSList *entry;
  41         void *data;
  42
  43         if (!dialog) return;
  44
  45         g_free(dialog->with);
  46         g_free(dialog->endpoint_GUID);
  47         entry = dialog->routes;
  48         while (entry) {
  49                 data = entry->data;
  50                 entry = g_slist_remove(entry, data);
  51                 g_free(data);
  52         }
  53         entry = dialog->supported;
  54         while (entry) {
  55                 data = entry->data;
  56                 entry = g_slist_remove(entry, data);
  57                 g_free(data);
  58         }
  59
  60         while (dialog->filetransfers) {
  61                 struct sipe_file_transfer *ft = dialog->filetransfers->data;
  62                 sipe_ft_free(ft);
  63         }
  64
  65         g_free(dialog->callid);
  66         g_free(dialog->ourtag);
  67         g_free(dialog->theirtag);
  68         g_free(dialog->theirepid);
  69         g_free(dialog->request);
  70
  71         g_free(dialog);
  72 }
  73
  74 struct sip_dialog *sipe_dialog_add(struct sip_session *session)
  75 {
  76         struct sip_dialog *dialog = g_new0(struct sip_dialog, 1);
  77         session->dialogs = g_slist_append(session->dialogs, dialog);
  78         return(dialog);
  79 }
  80
  81 static struct sip_dialog *
  82 sipe_dialog_find_3(struct sip_session *session,
  83                    struct sip_dialog *dialog_in)
  84 {
  85         if (session && dialog_in) {
  86                 SIPE_DIALOG_FOREACH {
  87                         if (    dialog_in->callid &&
  88                                 dialog_in->ourtag &&
  89                                 dialog_in->theirtag &&
  90
  91                                 dialog->callid &&
  92                                 dialog->ourtag &&
  93                                 dialog->theirtag &&
  94
  95                                 sipe_strcase_equal(dialog_in->callid, dialog->callid) &&
  96                                 sipe_strcase_equal(dialog_in->ourtag, dialog->ourtag) &&
  97                                 sipe_strcase_equal(dialog_in->theirtag, dialog->theirtag))
  98                         {
  99                                 SIPE_DEBUG_INFO("sipe_dialog_find_3 who='%s'",
 100                                                 dialog->with ? dialog->with : "");
 101                                 return dialog;
 102                         }
 103                 } SIPE_DIALOG_FOREACH_END;
 104         }
 105         return NULL;
 106 }
 107
 108 struct sip_dialog *sipe_dialog_find(struct sip_session *session,
 109                                     const gchar *who)
 110 {
 111         if (session && who) {
 112                 SIPE_DIALOG_FOREACH {
 113                         if (dialog->with && sipe_strcase_equal(who, dialog->with)) {
 114                                 SIPE_DEBUG_INFO("sipe_dialog_find who='%s'", who);
 115                                 return dialog;
 116                         }
 117                 } SIPE_DIALOG_FOREACH_END;
 118         }
 119         return NULL;
 120 }
 121
 122 void sipe_dialog_remove(struct sip_session *session, const gchar *who)
 123 {
 124         struct sip_dialog *dialog = sipe_dialog_find(session, who);
 125         if (dialog) {
 126                 SIPE_DEBUG_INFO("sipe_dialog_remove who='%s' with='%s'", who, dialog->with ? dialog->with : "");
 127                 session->dialogs = g_slist_remove(session->dialogs, dialog);
 128                 sipe_dialog_free(dialog);
 129         }
 130 }
 131
 132 void
 133 sipe_dialog_remove_3(struct sip_session *session,
 134                      struct sip_dialog *dialog_in)
 135 {
 136         struct sip_dialog *dialog = sipe_dialog_find_3(session, dialog_in);
 137         if (dialog) {
 138                 SIPE_DEBUG_INFO("sipe_dialog_remove_3 with='%s'",
 139                                 dialog->with ? dialog->with : "");
 140                 session->dialogs = g_slist_remove(session->dialogs, dialog);
 141                 sipe_dialog_free(dialog);
 142         }
 143 }
 144
 145 void sipe_dialog_remove_all(struct sip_session *session)
 146 {
 147         GSList *entry = session->dialogs;
 148         while (entry) {
 149                 struct sip_dialog *dialog = entry->data;
 150                 entry = g_slist_remove(entry, dialog);
 151                 sipe_dialog_free(dialog);
 152         }
 153 }
 154
 155 static void sipe_dialog_parse_routes(struct sip_dialog *dialog,
 156                                      const struct sipmsg *msg,
 157                                      gboolean outgoing)
 158 {
 159         GSList *hdr = msg->headers;
 160         gchar *contact = sipmsg_find_part_of_header(sipmsg_find_header(msg, "Contact"), "<", ">", NULL);
 161
 162         /* Remove old routes */
 163         while (dialog->routes) {
 164                 void *data = dialog->routes->data;
 165                 dialog->routes = g_slist_remove(dialog->routes, data);
 166                 g_free(data);
 167         }
 168         g_free(dialog->request);
 169         dialog->request = NULL;
 170
 171         while (hdr) {
 172                 struct sipnameval *elem = hdr->data;
 173                 if (sipe_strcase_equal(elem->name, "Record-Route")) {
 174                         gchar **parts = g_strsplit(elem->value, ",", 0);
 175                         gchar **part = parts;
 176
 177                         while (*part) {
 178                                 SIPE_DEBUG_INFO("sipe_dialog_parse_routes: route %s", *part);
 179                                 dialog->routes = g_slist_append(dialog->routes,
 180                                                                 g_strdup(*part));
 181                                 part++;
 182                         }
 183                         g_strfreev(parts);
 184                 }
 185                 hdr = g_slist_next(hdr);
 186         }
 187         if (outgoing) {
 188                 dialog->routes = g_slist_reverse(dialog->routes);
 189         }
 190
 191         if (contact) {
 192                 dialog->request = contact;
 193         }
 194
 195         /* logic for strict router only - RFC3261 - 12.2.1.1 */
 196         /* @TODO: proper check for presence of 'lr' PARAMETER in URI */
 197         if (dialog->routes && !strstr(dialog->routes->data, ";lr")) {
 198                 gchar *route = dialog->routes->data;
 199                 dialog->request = sipmsg_find_part_of_header(route, "<", ">", NULL);
 200                 SIPE_DEBUG_INFO("sipe_dialog_parse_routes: strict route, contact %s", dialog->request);
 201                 dialog->routes = g_slist_remove(dialog->routes, route);
 202                 g_free(route);
 203                 if (contact) {
 204                         dialog->routes = g_slist_append(dialog->routes,
 205                                                         g_strdup_printf("<%s>", contact));
 206                         g_free(contact);
 207                 }
 208         }
 209 }
 210
 211 static void
 212 sipe_get_supported_header(const struct sipmsg *msg,
 213                           struct sip_dialog *dialog,
 214                           SIPE_UNUSED_PARAMETER gboolean outgoing)
 215 {
 216         GSList *hdr = msg->headers;
 217         struct sipnameval *elem;
 218         while(hdr)
 219         {
 220                 elem = hdr->data;
 221                 if (sipe_strcase_equal(elem->name, "Supported")
 222                         && !g_slist_find_custom(dialog->supported, elem->value, (GCompareFunc)g_ascii_strcasecmp))
 223                 {
 224                         dialog->supported = g_slist_append(dialog->supported, g_strdup(elem->value));
 225
 226                 }
 227                 hdr = g_slist_next(hdr);
 228         }
 229 }
 230
 231 static gchar *find_tag(const gchar *hdr)
 232 {
 233         gchar * tag = sipmsg_find_part_of_header (hdr, "tag=", ";", NULL);
 234         if (!tag) {
 235                 // In case it's at the end and there's no trailing ;
 236                 tag = sipmsg_find_part_of_header (hdr, "tag=", NULL, NULL);
 237         }
 238         return tag;
 239 }
 240
 241 void sipe_dialog_parse(struct sip_dialog *dialog,
 242                        const struct sipmsg *msg,
 243                        gboolean outgoing)
 244 {
 245         gchar *us = outgoing ? "From" : "To";
 246         gchar *them = outgoing ? "To" : "From";
 247         const gchar *session_expires_header;
 248
 249         g_free(dialog->ourtag);
 250         g_free(dialog->theirtag);
 251
 252         dialog->ourtag = find_tag(sipmsg_find_header(msg, us));
 253         dialog->theirtag = find_tag(sipmsg_find_header(msg, them));
 254         if (!dialog->theirepid) {
 255                 dialog->theirepid = sipmsg_find_part_of_header(sipmsg_find_header(msg, them), "epid=", ";", NULL);
 256                 if (!dialog->theirepid) {
 257                         dialog->theirepid = sipmsg_find_part_of_header(sipmsg_find_header(msg, them), "epid=", NULL, NULL);
 258                 }
 259         }
 260
 261         // Catch a tag on the end of the To Header and get rid of it.
 262         if (dialog->theirepid && strstr(dialog->theirepid, "tag=")) {
 263                 dialog->theirepid = strtok(dialog->theirepid, ";");
 264         }
 265
 266         if ((session_expires_header = sipmsg_find_header(msg, "Session-Expires"))) {
 267                 dialog->expires = atoi(session_expires_header);
 268         }
 269
 270         sipe_dialog_parse_routes(dialog, msg, outgoing);
 271         sipe_get_supported_header(msg, dialog, outgoing);
 272 }
 273
 274 /*
 275   Local Variables:
 276   mode: c
 277   c-file-style: "bsd"
 278   indent-tabs-mode: t
 279   tab-width: 8
 280   End:
 281 */