exinsubscription_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

#ifndef MINISIZE

#include "eXosip2.h"

extern eXosip_t eXosip;

int
_eXosip_insubscription_transaction_find (int tid, eXosip_notify_t ** jn,
                                         eXosip_dialog_t ** jd,
                                         osip_transaction_t ** tr)
{
  for (*jn = eXosip.j_notifies; *jn != NULL; *jn = (*jn)->next)
    {
      if ((*jn)->n_inc_tr != NULL && (*jn)->n_inc_tr->transactionid == tid)
        {
          *tr = (*jn)->n_inc_tr;
          *jd = (*jn)->n_dialogs;
          return OSIP_SUCCESS;
        }
      if ((*jn)->n_out_tr != NULL && (*jn)->n_out_tr->transactionid == tid)
        {
          *tr = (*jn)->n_out_tr;
          *jd = (*jn)->n_dialogs;
          return OSIP_SUCCESS;
        }
      for (*jd = (*jn)->n_dialogs; *jd != NULL; *jd = (*jd)->next)
        {
          osip_transaction_t *transaction;
          int pos = 0;

          while (!osip_list_eol ((*jd)->d_inc_trs, pos))
            {
              transaction =
                (osip_transaction_t *) osip_list_get ((*jd)->d_inc_trs, pos);
              if (transaction != NULL && transaction->transactionid == tid)
                {
                  *tr = transaction;
                  return OSIP_SUCCESS;
                }
              pos++;
            }

          pos = 0;
          while (!osip_list_eol ((*jd)->d_out_trs, pos))
            {
              transaction =
                (osip_transaction_t *) osip_list_get ((*jd)->d_out_trs, pos);
              if (transaction != NULL && transaction->transactionid == tid)
                {
                  *tr = transaction;
                  return OSIP_SUCCESS;
                }
              pos++;
            }
        }
    }
  *jd = NULL;
  *jn = NULL;
  return OSIP_NOTFOUND;
}

int
eXosip_insubscription_remove (int did)
{
  eXosip_dialog_t *jd = NULL;
  eXosip_notify_t *jn = NULL;

  if (did <= 0)
    return OSIP_BADPARAMETER;

  if (did > 0)
    {
      eXosip_notify_dialog_find (did, &jn, &jd);
    }
  if (jd == NULL || jn == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No incoming subscription here?\n"));
      return OSIP_NOTFOUND;
    }
  REMOVE_ELEMENT (eXosip.j_notifies, jn);
  eXosip_notify_free (jn);
  return OSIP_SUCCESS;
}

int
eXosip_insubscription_build_answer (int tid, int status, osip_message_t ** answer)
{
  int i = -1;
  eXosip_dialog_t *jd = NULL;
  eXosip_notify_t *jn = NULL;
  osip_transaction_t *tr = NULL;

  *answer = NULL;

  if (tid <= 0)
    return OSIP_BADPARAMETER;

  if (tid > 0)
    {
      _eXosip_insubscription_transaction_find (tid, &jn, &jd, &tr);
    }
  if (tr == NULL || jd == NULL || jn == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No incoming subscription here?\n"));
      return OSIP_NOTFOUND;
    }

  if (status < 101 || status > 699)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: wrong status code (101<status<699)\n"));
      return OSIP_BADPARAMETER;
    }

  if (jd != NULL)
    i =
      _eXosip_build_response_default (answer, jd->d_dialog, status,
                                      tr->orig_request);
  else
    i = _eXosip_build_response_default (answer, NULL, status, tr->orig_request);

  if (i != 0)
    {
      OSIP_TRACE (osip_trace (__FILE__, __LINE__, OSIP_ERROR, NULL,
                              "ERROR: Could not create response for %s\n",
                              tr->orig_request->sip_method));
      return i;
    }

  if (status >= 200 && status <= 299)
    _eXosip_notify_add_expires_in_2XX_for_subscribe (jn, *answer);

  if (status < 300)
    i = complete_answer_that_establish_a_dialog (*answer, tr->orig_request);

  return i;
}

int
eXosip_insubscription_send_answer (int tid, int status, osip_message_t * answer)
{
  int i = -1;
  eXosip_dialog_t *jd = NULL;
  eXosip_notify_t *jn = NULL;
  osip_transaction_t *tr = NULL;
  osip_event_t *evt_answer;

  if (tid <= 0)
    return OSIP_BADPARAMETER;

  if (tid > 0)
    {
      _eXosip_insubscription_transaction_find (tid, &jn, &jd, &tr);
    }
  if (jd == NULL || tr == NULL || tr->orig_request == NULL
      || tr->orig_request->sip_method == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No incoming subscription here?\n"));
      osip_message_free (answer);
      return OSIP_NOTFOUND;
    }

  if (answer == NULL)
    {
      if (0 == osip_strcasecmp (tr->orig_request->sip_method, "SUBSCRIBE"))
        {
          if (status >= 200 && status <= 299)
            {
              OSIP_TRACE (osip_trace
                          (__FILE__, __LINE__, OSIP_ERROR, NULL,
                           "eXosip: Wrong parameter?\n"));
              return OSIP_BADPARAMETER;
            }
        }
    }

  /* 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)
    {
      if (0 == osip_strcasecmp (tr->orig_request->sip_method, "SUBSCRIBE"))
        {
          if (status < 200)
            i = _eXosip_insubscription_answer_1xx (jn, jd, status);
          else
            i = _eXosip_insubscription_answer_3456xx (jn, jd, status);
          if (i != 0)
            {
              OSIP_TRACE (osip_trace
                          (__FILE__, __LINE__, OSIP_ERROR, NULL,
                           "eXosip: cannot send response!\n"));
              return i;
            }
      } else
        {
          /* TODO */
          OSIP_TRACE (osip_trace
                      (__FILE__, __LINE__, OSIP_ERROR, NULL,
                       "eXosip: a response must be given!\n"));
          return OSIP_BADPARAMETER;
        }
      return OSIP_SUCCESS;
  } else
    {
      i = 0;
    }

  if (0 == osip_strcasecmp (tr->orig_request->sip_method, "SUBSCRIBE"))
    {
      if (MSG_IS_STATUS_1XX (answer))
        {
      } else if (MSG_IS_STATUS_2XX (answer))
        {
          eXosip_dialog_set_200ok (jd, answer);
          osip_dialog_set_state (jd->d_dialog, DIALOG_CONFIRMED);
      } else if (answer->status_code >= 300 && answer->status_code <= 699)
        {
          i = 0;
      } else
        {
          OSIP_TRACE (osip_trace
                      (__FILE__, __LINE__, OSIP_ERROR, NULL,
                       "eXosip: wrong status code (101<status<699)\n"));
          osip_message_free (answer);
          return OSIP_BADPARAMETER;
        }
      if (i != 0)
        {
          osip_message_free (answer);
          return i;
        }
    }

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

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

int
eXosip_insubscription_build_notify (int did, int subscription_status,
                                    int subscription_reason,
                                    osip_message_t ** request)
{
  eXosip_dialog_t *jd = NULL;
  eXosip_notify_t *jn = NULL;

  char subscription_state[50];
  char *tmp;
  time_t now = time (NULL);

  int i;

  *request = NULL;

  if (did <= 0)
    return OSIP_BADPARAMETER;

  if (did > 0)
    {
      eXosip_notify_dialog_find (did, &jn, &jd);
    }
  if (jd == NULL || jn == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No incoming subscription here?\n"));
      return OSIP_NOTFOUND;
    }

  i = eXosip_insubscription_build_request (did, "NOTIFY", request);
  if (i != 0)
    {
      return i;
    }
#ifndef SUPPORT_MSN
  if (subscription_status == EXOSIP_SUBCRSTATE_PENDING)
    osip_strncpy (subscription_state, "pending;expires=", 16);
  else if (subscription_status == EXOSIP_SUBCRSTATE_ACTIVE)
    osip_strncpy (subscription_state, "active;expires=", 15);
  else if (subscription_status == EXOSIP_SUBCRSTATE_TERMINATED)
    {
      if (subscription_reason == DEACTIVATED)
        osip_strncpy (subscription_state, "terminated;reason=deactivated", 29);
      else if (subscription_reason == PROBATION)
        osip_strncpy (subscription_state, "terminated;reason=probation", 27);
      else if (subscription_reason == REJECTED)
        osip_strncpy (subscription_state, "terminated;reason=rejected", 26);
      else if (subscription_reason == TIMEOUT)
        osip_strncpy (subscription_state, "terminated;reason=timeout", 25);
      else if (subscription_reason == GIVEUP)
        osip_strncpy (subscription_state, "terminated;reason=giveup", 24);
      else if (subscription_reason == NORESOURCE)
        osip_strncpy (subscription_state, "terminated;reason=noresource", 28);
      else
        osip_strncpy (subscription_state, "terminated;reason=noresource", 28);
  } else
    osip_strncpy (subscription_state, "pending;expires=", 16);

  tmp = subscription_state + strlen (subscription_state);
  if (subscription_status != EXOSIP_SUBCRSTATE_TERMINATED)
    sprintf (tmp, "%li", jn->n_ss_expires - now);
  osip_message_set_header (*request, "Subscription-State", subscription_state);
#endif

  return OSIP_SUCCESS;
}

int
eXosip_insubscription_build_request (int did, const char *method,
                                     osip_message_t ** request)
{
  eXosip_dialog_t *jd = NULL;
  eXosip_notify_t *jn = NULL;

  osip_transaction_t *transaction;
  char *transport;
  int i;

  *request = NULL;
  if (method == NULL || method[0] == '\0')
    return OSIP_BADPARAMETER;

  if (did <= 0)
    return OSIP_BADPARAMETER;

  if (did > 0)
    {
      eXosip_notify_dialog_find (did, &jn, &jd);
    }
  if (jd == NULL || jn == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No incoming subscription here?\n"));
      return OSIP_NOTFOUND;
    }

  transaction = NULL;