exmessage_api.c

mediastreamer2是开源的网络传输媒体流的库

/*
  eXosip - This is the eXtended osip library.
  Copyright (C) 2002,2003,2004,2005,2006,2007  Aymeric MOIZARD  - [e-mail]
  
  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"

extern eXosip_t eXosip;

int
eXosip_message_build_request (osip_message_t ** message, const char *method,
                              const char *to, const char *from, const char *route)
{
  int i;

  *message = NULL;
  if (method != NULL && *method == '\0')
    return OSIP_BADPARAMETER;
  if (to != NULL && *to == '\0')
    return OSIP_BADPARAMETER;
  if (from != NULL && *from == '\0')
    return OSIP_BADPARAMETER;
  if (route != NULL && *route == '\0')
    route = NULL;

  i = generating_request_out_of_dialog (message, method, to, "UDP", from, route);
  if (i != 0)
    return i;

  return OSIP_SUCCESS;
}

int
eXosip_message_send_request (osip_message_t * message)
{
  osip_transaction_t *transaction;
  osip_event_t *sipevent;
  int i;

  i = _eXosip_transaction_init (&transaction, NICT, eXosip.j_osip, message);
  if (i != 0)
    {
      osip_message_free (message);
      return i;
    }

  osip_list_add (&eXosip.j_transactions, transaction, 0);

  sipevent = osip_new_outgoing_sipmessage (message);
  sipevent->transactionid = transaction->transactionid;

#ifndef MINISIZE
  osip_transaction_set_your_instance (transaction,
                                      __eXosip_new_jinfo (NULL, NULL, NULL, NULL));
#else
  osip_transaction_set_your_instance (transaction,
                                      __eXosip_new_jinfo (NULL, NULL));
#endif
  osip_transaction_add_event (transaction, sipevent);

  __eXosip_wakeup ();
  return OSIP_SUCCESS;
}

int
eXosip_message_build_answer (int tid, int status, osip_message_t ** answer)
{
  osip_transaction_t *tr = NULL;
  int i;

  *answer = NULL;

  if (tid <= 0)
    return OSIP_BADPARAMETER;
  if (status < 200 || status > 699)
    return OSIP_BADPARAMETER;

  if (tid > 0)
    {
      eXosip_transaction_find (tid, &tr);
    }
  if (tr == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No call here?\n"));
      return OSIP_NOTFOUND;
    }

  i = -1;
  if (status < 300)             /* 2xx answer */
    i = _eXosip_build_response_default (answer, NULL, status, tr->orig_request);
  else if (status > 300)        /* 3456xx answer */
    i = _eXosip_build_response_default (answer, NULL, status, tr->orig_request);

  if (i != 0)
    return i;
  return OSIP_SUCCESS;
}

int
eXosip_message_send_answer (int tid, int status, osip_message_t * answer)
{
  osip_transaction_t *tr = NULL;
  osip_event_t *evt_answer;
  int i = -1;

  if (tid <= 0)
    return OSIP_BADPARAMETER;
  if (status <= 100 || status > 699)
    return OSIP_BADPARAMETER;
  if (answer == NULL && status > 100 && status < 200)
    return OSIP_BADPARAMETER;

  if (tid > 0)
    {
      eXosip_transaction_find (tid, &tr);
    }
  if (tr == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No MESSAGE transaction found\n"));
      osip_message_free (answer);
      return OSIP_NOTFOUND;
    }

  /* is the transaction already answered? */
  if (tr->state == NIST_COMPLETED || tr->state == NIST_TERMINATED)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: transaction already answered\n"));
      osip_message_free (answer);
      return OSIP_WRONG_STATE;
    }

  if (answer == NULL)
    {
      i = -1;
      if (status > 199 && status < 300)
        i = _eXosip_build_response_default (&answer, NULL, status,
                                            tr->orig_request);
      else if (status > 300 && status <= 699)
        i = _eXosip_build_response_default (&answer, NULL, status,
                                            tr->orig_request);
      if (i != 0)
        return i;
    }

  evt_answer = osip_new_outgoing_sipmessage (answer);
  evt_answer->transactionid = tr->transactionid;

  osip_transaction_add_event (tr, evt_answer);
  __eXosip_wakeup ();
  return OSIP_SUCCESS;
}