How-To send or update registrations.
[The eXtented eXosip stack]

eXosip2 offers a flexible API to help you to register one or several identities.

Initiate a registration

To start a registration, you need to build a default REGISTER request bby providing several mandatory headers

  osip_message_t *reg = NULL;
  int id;
  int i;

  eXosip_lock ();
  id = eXosip_register_build_initial_register (identity, registrar, NULL,
                                               1800, &reg);
  if (id < 0)
    {
      eXosip_unlock ();
      return -1;
    }

  osip_message_set_supported (reg, "100rel");
  osip_message_set_supported(reg, "path");

  i = eXosip_register_send_register (id, reg);
  eXosip_unlock ();
  return i;

The returned element of eXosip_register_build_initial_register is the registration identifier that you can use to update your registration. In future events about this registration, you'll see that registration identifier when applicable.

Update a registration

You just need to reuse the registration identifier:

  int i;

  eXosip_lock ();
  i = eXosip_register_build_register (id, 1800, &reg);
  if (i < 0)
    {
      eXosip_unlock ();
      return -1;
    }

  eXosip_register_send_register (id, reg);
  eXosip_unlock ();

Note: The above code also shows that the stack is sometimes able to build and send a default SIP messages with only one API call

Closing the registration

A softphone should delete its registration on the SIP server when terminating. To do so, you have to send a REGISTER request with the expires header set to value "0".

The same code as for updating a registration is used with 0 instead of 1800 for the expiration delay.


Generated on Wed Feb 13 01:25:39 2008 for libeXosip2 by  doxygen 1.5.4