excall_api.c

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  eXosip_update ();             /* AMD 30/09/05 */
  return OSIP_SUCCESS;
}

#ifndef MINISIZE

int
eXosip_call_build_prack (int tid, osip_message_t ** prack)
{
  eXosip_dialog_t *jd = NULL;
  eXosip_call_t *jc = NULL;
  osip_transaction_t *tr = NULL;

  osip_header_t *rseq;
  char *transport;
  int i;

  *prack = NULL;

  if (tid < 0)
    return OSIP_BADPARAMETER;

  if (tid > 0)
    {
      _eXosip_call_transaction_find (tid, &jc, &jd, &tr);
    }
  if (jc == NULL || jd == NULL || jd->d_dialog == NULL
      || tr == NULL || tr->orig_request == NULL
      || tr->orig_request->sip_method == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No call here or no transaction for call\n"));
      return OSIP_NOTFOUND;
    }

  if (0 != osip_strcasecmp (tr->orig_request->sip_method, "INVITE"))
    return OSIP_BADPARAMETER;

  /* PRACK are only send in the PROCEEDING state */
  if (tr->state != ICT_PROCEEDING)
    return OSIP_WRONG_STATE;

  if (tr->orig_request->cseq == NULL
      || tr->orig_request->cseq->number == NULL
      || tr->orig_request->cseq->method == NULL)
    return OSIP_SYNTAXERROR;

  transport = NULL;
  if (tr != NULL && tr->orig_request != NULL)
    transport = _eXosip_transport_protocol (tr->orig_request);

  if (transport == NULL)
    i = _eXosip_build_request_within_dialog (prack, "PRACK", jd->d_dialog, "UDP");
  else
    i =
      _eXosip_build_request_within_dialog (prack, "PRACK", jd->d_dialog,
                                           transport);

  if (i != 0)
    return i;

  osip_message_header_get_byname (tr->last_response, "RSeq", 0, &rseq);
  if (rseq != NULL && rseq->hvalue != NULL)
    {
      char tmp[128];

      memset (tmp, '\0', sizeof (tmp));
      snprintf (tmp, 127, "%s %s %s", rseq->hvalue,
                tr->orig_request->cseq->number, tr->orig_request->cseq->method);
      osip_message_set_header (*prack, "RAck", tmp);
    }

  return OSIP_SUCCESS;
}

int
eXosip_call_send_prack (int tid, osip_message_t * prack)
{
  eXosip_dialog_t *jd = NULL;
  eXosip_call_t *jc = NULL;
  osip_transaction_t *tr = NULL;

  osip_event_t *sipevent;
  int i;

  if (tid < 0)
    return OSIP_BADPARAMETER;
  if (prack == NULL)
    return OSIP_BADPARAMETER;

  if (tid > 0)
    {
      _eXosip_call_transaction_find (tid, &jc, &jd, &tr);
    }
  if (jc == NULL || jd == NULL || jd->d_dialog == NULL
      || tr == NULL || tr->orig_request == NULL
      || tr->orig_request->sip_method == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No call here or no transaction for call\n"));
      osip_message_free (prack);
      return OSIP_NOTFOUND;
    }

  if (0 != osip_strcasecmp (tr->orig_request->sip_method, "INVITE"))
    {
      osip_message_free (prack);
      return OSIP_BADPARAMETER;
    }

  /* PRACK are only send in the PROCEEDING state */
  if (tr->state != ICT_PROCEEDING)
    {
      osip_message_free (prack);
      return OSIP_WRONG_STATE;
    }

  tr = NULL;
  i = _eXosip_transaction_init (&tr, NICT, eXosip.j_osip, prack);

  if (i != 0)
    {
      osip_message_free (prack);
      return i;
    }

  jd->d_mincseq++;

  osip_list_add (jd->d_out_trs, tr, 0);

  sipevent = osip_new_outgoing_sipmessage (prack);
  sipevent->transactionid = tr->transactionid;

#ifndef MINISIZE
  osip_transaction_set_your_instance (tr, __eXosip_new_jinfo (jc, jd, NULL, NULL));
#else
  osip_transaction_set_your_instance (tr, __eXosip_new_jinfo (jc, jd));
#endif
  osip_transaction_add_event (tr, sipevent);
  __eXosip_wakeup ();
  return OSIP_SUCCESS;
}

#endif

int
_eXosip_call_retry_request (eXosip_call_t * jc,
                            eXosip_dialog_t * jd, osip_transaction_t * out_tr)
{
  osip_transaction_t *tr = NULL;
  osip_message_t *msg = NULL;
  osip_event_t *sipevent;

  int cseq;
  osip_via_t *via;
  osip_contact_t *co;
  int pos;
  int i;
  int protocol = IPPROTO_UDP;

  if (jc == NULL)
    return OSIP_BADPARAMETER;
  if (jd != NULL)
    {
      if (jd->d_out_trs == NULL)
        return OSIP_BADPARAMETER;
    }
  if (out_tr == NULL
      || out_tr->orig_request == NULL || out_tr->last_response == NULL)
    return OSIP_BADPARAMETER;

  i = osip_message_clone (out_tr->orig_request, &msg);
  if (i != 0)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: could not clone msg for authentication\n"));
      return i;
    }

  via = (osip_via_t *) osip_list_get (&msg->vias, 0);
  if (via == NULL || msg->cseq == NULL || msg->cseq->number == NULL)
    {
      osip_message_free (msg);
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: missing via or cseq header\n"));
      return OSIP_SYNTAXERROR;
    }

  if (MSG_IS_STATUS_3XX (out_tr->last_response))
    {
      co = NULL;
      pos = 0;
      while (!osip_list_eol (&out_tr->last_response->contacts, pos))
        {
          co =
            (osip_contact_t *) osip_list_get (&out_tr->last_response->contacts,
                                              pos);
          if (co != NULL && co->url != NULL)
            {
              /* check tranport? Only allow UDP, right now */
              osip_uri_param_t *u_param;
              int pos2;

              u_param = NULL;
              pos2 = 0;
              while (!osip_list_eol (&co->url->url_params, pos2))
                {
                  u_param =
                    (osip_uri_param_t *) osip_list_get (&co->url->url_params,
                                                        pos2);
                  if (u_param == NULL || u_param->gname == NULL
                      || u_param->gvalue == NULL)
                    {
                      u_param = NULL;
                      /* skip */
                  } else if (0 == osip_strcasecmp (u_param->gname, "transport"))
                    {
                      if (0 == osip_strcasecmp (u_param->gvalue, "udp"))
                        {
                          u_param = NULL;
                          protocol = IPPROTO_UDP;
                          break;        /* ok */
                      } else if (0 == osip_strcasecmp (u_param->gvalue, "tcp"))
                        {
                          protocol = IPPROTO_TCP;
                          u_param = NULL;
                        }
                      break;
                    }
                  pos2++;
                }

              if (u_param == NULL || u_param->gname == NULL
                  || u_param->gvalue == NULL)
                {
                  break;        /* default is udp! */
                }
            }
          pos++;
          co = NULL;
        }

      if (co == NULL || co->url == NULL)
        {
          osip_message_free (msg);
          OSIP_TRACE (osip_trace
                      (__FILE__, __LINE__, OSIP_ERROR, NULL,
                       "eXosip: contact header\n"));
          return OSIP_SYNTAXERROR;
        }

      /* TODO:
         remove extra parameter from new request-uri
         check usual parameter like "transport"
       */

      if (msg->req_uri != NULL && msg->req_uri->host != NULL
          && co->url->host != NULL
          && 0 == osip_strcasecmp (co->url->host, msg->req_uri->host))
        {
          osip_uri_param_t *maddr_param = NULL;
          osip_uri_uparam_get_byname (co->url, "maddr", &maddr_param);
          if (maddr_param != NULL && maddr_param->gvalue != NULL)
            {
              /* This is a redirect server, the route should probably be removed? */
              osip_route_t *route = NULL;
              osip_generic_param_t *tag = NULL;
              osip_message_get_route (msg, 0, &route);
              if (route != NULL)
                {
                  osip_to_get_tag (msg->to, &tag);
                  if (tag == NULL && route != NULL && route->url != NULL)
                    {
                      osip_list_remove (&msg->routes, 0);
                      osip_route_free (route);
                    }
                }
            }
        }

      /* replace request-uri with NEW contact address */
      osip_uri_free (msg->req_uri);
      msg->req_uri = NULL;
      osip_uri_clone (co->url, &msg->req_uri);

      /* support for diversions headers/draft! */
      {
        int count = 0;
        pos = 0;
        while (!osip_list_eol (&out_tr->last_response->headers, pos))
          {
            osip_header_t *copy = NULL;
            osip_header_t *head =
              osip_list_get (&out_tr->last_response->headers, pos);
            if (head != NULL && 0 == osip_strcasecmp (head->hname, "diversion"))
              {
                i = osip_header_clone (head, &copy);
                if (i == 0)
                  {
                    osip_list_add (&msg->headers, copy, count);
                    count++;
                  }
              }
            pos++;
          }
      }

    }
  /* remove all previous authentication headers */
  osip_list_special_free (&msg->authorizations,
                          (void *(*)(void *)) &osip_authorization_free);
  osip_list_special_free (&msg->proxy_authorizations,
                          (void *(*)(void *)) &osip_proxy_authorization_free);

  /* increment cseq */
  cseq = atoi (msg->cseq->number);
  osip_free (msg->cseq->number);
  msg->cseq->number = strdup_printf ("%i", cseq + 1);
  if (jd != NULL && jd->d_dialog != NULL)
    {
      jd->d_dialog->local_cseq++;
    }

  i = eXosip_update_top_via (msg);
  if (i != 0)
    {
      osip_message_free (msg);
      return i;
    }

  if (out_tr->last_response->status_code == 401
      || out_tr->last_response->status_code == 407)
    eXosip_add_authentication_information (msg, out_tr->last_response);
  else
    eXosip_add_authentication_information (msg, NULL);
  osip_message_force_update (msg);

  if (0 != osip_strcasecmp (msg->sip_method, "INVITE"))
    {
      i = _eXosip_transaction_init (&tr, NICT, eXosip.j_osip, msg);
  } else
    {
      i = _eXosip_transaction_init (&tr, ICT, eXosip.j_osip, msg);
    }

  if (i != 0)
    {
      osip_message_free (msg);
      return i;
    }

  if (out_tr == jc->c_out_tr)
    {
      /* replace with the new tr */
      osip_list_add (&eXosip.j_transactions, jc->c_out_tr, 0);
      jc->c_out_tr = tr;

      /* fix dialog issue */
      if (jd != NULL)
        {
          REMOVE_ELEMENT (jc->c_dialogs, jd);
          eXosip_dialog_free (jd);
          jd = NULL;
        }
  } else
    {
      /* add the new tr for the current dialog */
      osip_list_add (jd->d_out_trs, tr, 0);
    }

  sipevent = osip_new_outgoing_sipmessage (msg);

#ifndef MINISIZE
  osip_transaction_set_your_instance (tr, __eXosip_new_jinfo (jc, jd, NULL, NULL));
#else
  osip_transaction_set_your_instance (tr, __eXosip_new_jinfo (jc, jd));
#endif
  osip_transaction_add_event (tr, sipevent);

  eXosip_update ();             /* fixed? */
  __eXosip_wakeup ();
  return OSIP_SUCCESS;
}

#ifndef MINISIZE

int
eXosip_call_get_referto (int did, char *refer_to, size_t refer_to_len)
{
  eXosip_dialog_t *jd = NULL;
  eXosip_call_t *jc = NULL;
  osip_transaction_t *tr = NULL;
  osip_uri_t *referto_uri;
  char atmp[256];
  char *referto_tmp = NULL;
  int i;

  if (did <= 0)
    return OSIP_BADPARAMETER;

  eXosip_call_dialog_find (did, &jc, &jd);
  if (jc == NULL || jd == NULL || jd->d_dialog == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No call here?\n"));
      return OSIP_NOTFOUND;
    }

  tr = eXosip_find_last_invite (jc, jd);

  if (tr == NULL || tr->orig_request == NULL)
    {
      OSIP_TRACE (osip_trace
                  (__FILE__, __LINE__, OSIP_ERROR, NULL,
                   "eXosip: No transaction for call?\n"));
      return OSIP_NOTFOUND;
    }

  i = osip_uri_clone (jd->d_dialog->remote_uri->url, &referto_uri);
  if (i != 0)
    return i;

  snprintf (atmp, sizeof (atmp), "%s;to-tag=%s;from-tag=%s",
            jd->d_dialog->call_id,
            jd->d_dialog->remote_tag, jd->d_dialog->local_tag);

  osip_uri_uheader_add (referto_uri, osip_strdup ("Replaces"), osip_strdup (atmp));
  i = osip_uri_to_str (referto_uri, &referto_tmp);
  if (i != 0)
    {
      osip_uri_free (referto_uri);
      return i;
    }

  snprintf (refer_to, refer_to_len, "%s", referto_tmp);
  osip_uri_free (referto_uri);

  return OSIP_SUCCESS;
}

int
eXosip_call_find_by_replaces (char *replaces_str)
{
  eXosip_call_t *jc = NULL;
  eXosip_dialog_t *jd = NULL;
  char *call_id;
  char *to_tag;
  char *from_tag;
  char *early_flag;
  char *semicolon;
  char *totag_str = (char *) "to-tag=";
  char *fromtag_str = (char *) "from-tag=";
  char *earlyonly_str = (char *) "early-only";

  /* copy replaces string */
  if (replaces_str == NULL)
    return OSIP_SYNTAXERROR;
  call_id = osip_strdup (replaces_str);
  if (call_id == NULL)
    return OSIP_NOMEM;

  /* parse replaces string */
  strcpy (call_id, replaces_str);
  to_tag = strstr (call_id, totag_str);
  from_tag = strstr (call_id, fromtag_str);
  early_flag = strstr (call_id, earlyonly_str);

  if ((to_tag == NULL) || (from_tag == NULL))
    {
      osip_free (call_id);
      return OSIP_SYNTAXERROR;
    }
  to_tag += strlen (totag_str);
  from_tag += strlen (fromtag_str);

  while ((semicolon = strrchr (call_id, ';')) != NULL)
    {
      *semicolon = '\0';
    }

  for (jc = eXosip.j_calls; jc != NULL; jc = jc->next)
    {
      for (jd = jc->c_dialogs; jd != NULL; jd = jd->next)
        {
          if (jd->d_dialog == NULL)
            {
              /* skip */
          } else if (((0 == strcmp (jd->d_dialog->call_id, call_id)) &&
                      (0 == strcmp (jd->d_dialog->remote_tag, to_tag)) &&
                      (0 == strcmp (jd->d_dialog->local_tag, from_tag)))
                     ||
                     ((0 == strcmp (jd->d_dialog->call_id, call_id)) &&
                      (0 == strcmp (jd->d_dialog->local_tag, to_tag)) &&
                      (0 == strcmp (jd->d_dialog->remote_tag, from_tag))))
            {
              /* This dialog match! */
              if (jd->d_dialog->state == DIALOG_CONFIRMED && early_flag != NULL)
                {
                  osip_free (call_id);
                  return OSIP_WRONG_STATE;      /* confirmed dialog but already answered with 486 */
                }
              if (jd->d_dialog->state == DIALOG_EARLY
                  && jd->d_dialog->type == CALLEE)
                {
                  osip_free (call_id);
                  return OSIP_BADPARAMETER;     /* confirmed dialog but already answered with 481 */
                }

              osip_free (call_id);
              return jc->c_id;  /* match anyway */
            }
        }
    }
  osip_free (call_id);
  return OSIP_NOTFOUND;         /* answer with 481 */
}

#endif