非常完全的SIP 软电话，底层，三层架构

/* eXosip - This is the eXtended osip library. Copyright (C) 2002, 2003 Aymeric MOIZARD - jack@atosc.org eXosip 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. eXosip 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 */ #ifdef ENABLE_MPATROL #include <mpatrol.h> #endif #include "eXosip2.h" #include <eXosip2/eXosip.h> #ifndef WIN32 #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #ifdef __APPLE_CC__ #include <unistd.h> #endif #else #include <windows.h> #endif extern eXosip_t eXosip; extern int ipv6_enable; /* Private functions */ static void eXosip_send_default_answer (eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt, int status, char *reason_phrase, char *warning, int line); static void eXosip_process_info (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt); static void eXosip_process_options (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt); static void eXosip_process_bye (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt); static void eXosip_process_refer (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt); static void eXosip_process_ack (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_event_t * evt); static void eXosip_process_prack (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt); static int cancel_match_invite (osip_transaction_t * invite, osip_message_t * cancel); static void eXosip_process_cancel (osip_transaction_t * transaction, osip_event_t * evt); static osip_event_t *eXosip_process_reinvite (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt); static void eXosip_process_new_options (osip_transaction_t * transaction, osip_event_t * evt); static void eXosip_process_new_invite (osip_transaction_t * transaction, osip_event_t * evt); static void eXosip_process_new_subscribe (osip_transaction_t * transaction, osip_event_t * evt); static void eXosip_process_subscribe_within_call (eXosip_notify_t * jn, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt); static void eXosip_process_notify_within_dialog (eXosip_subscribe_t * js, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt); static int eXosip_match_notify_for_subscribe (eXosip_subscribe_t * js, osip_message_t * notify); static void eXosip_process_message_outside_of_dialog (osip_transaction_t * tr, osip_event_t * evt); static void eXosip_process_refer_outside_of_dialog (osip_transaction_t * tr, osip_event_t * evt); static void eXosip_process_message_within_dialog (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt); static void eXosip_process_newrequest (osip_event_t * evt, int socket); static void eXosip_process_response_out_of_transaction (osip_event_t * evt); static int eXosip_pendingosip_transaction_exist (eXosip_call_t * jc, eXosip_dialog_t * jd); static int eXosip_release_finished_calls (eXosip_call_t * jc, eXosip_dialog_t * jd); static int eXosip_release_aborted_calls (eXosip_call_t * jc, eXosip_dialog_t * jd); static int eXosip_release_finished_transactions (eXosip_call_t *jc, eXosip_dialog_t * jd); static int eXosip_release_finished_transactions_for_subscription (eXosip_dialog_t *jd); static void eXosip_send_default_answer (eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt, int status, char *reason_phrase, char *warning, int line) { osip_event_t *evt_answer; osip_message_t *answer; int i; /* osip_list_add(eXosip.j_transactions, transaction, 0); */ osip_transaction_set_your_instance (transaction, NULL); /* THIS METHOD DOES NOT ACCEPT STATUS CODE BETWEEN 101 and 299 */ if (status > 100 && status < 299 && MSG_IS_INVITE (evt->sip)) return; if (jd != NULL) i = _eXosip_build_response_default (&answer, jd->d_dialog, status, evt->sip); else i = _eXosip_build_response_default (&answer, NULL, status, evt->sip); if (i != 0 || answer == NULL) { return; } if (reason_phrase != NULL) { char *_reason; _reason = osip_message_get_reason_phrase (answer); if (_reason != NULL) osip_free (_reason); _reason = osip_strdup (reason_phrase); osip_message_set_reason_phrase (answer, _reason); } osip_message_set_content_length (answer, "0"); if (status == 500) osip_message_set_retry_after (answer, "10"); evt_answer = osip_new_outgoing_sipmessage (answer); evt_answer->transactionid = transaction->transactionid; osip_transaction_add_event (transaction, evt_answer); __eXosip_wakeup (); } static void eXosip_process_options (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt) { osip_list_add (jd->d_inc_trs, transaction, 0); osip_transaction_set_your_instance (transaction, __eXosip_new_jinfo (jc, jd, NULL, NULL)); __eXosip_wakeup (); } static void eXosip_process_info (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt) { osip_list_add (jd->d_inc_trs, transaction, 0); osip_transaction_set_your_instance (transaction, __eXosip_new_jinfo (jc, jd, NULL, NULL)); __eXosip_wakeup (); } static void eXosip_process_bye (eXosip_call_t * jc, eXosip_dialog_t * jd, osip_transaction_t * transaction, osip_event_t * evt) { osip_event_t *evt_answer; osip_message_t *answer;