sl_cb.c

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/*
 * $Id: sl_cb.c 4763 2008-08-28 14:35:03Z henningw $
 *
 * Copyright (C) 2006 Voice Sistem SRL
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * Kamailio 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.
 *
 * Kamailio 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.
 *
 * History:
 * ---------
 *  2006-03-29  first version (bogdan)
 */

/*!
 * \file
 * \brief SL :: callbacks
 * \ingroup sl
 * - Module: \ref sl
 */

#include "../../mem/mem.h"
#include "sl_cb.h"

/*! callback list head */
struct sl_callback* slcb_hl = 0;


/*! cleanup callback list */
void destroy_slcb_lists(void)
{
   struct sl_callback *cbp, *cbp_tmp;

   for( cbp=slcb_hl; cbp ; ) {
      cbp_tmp = cbp;
      cbp = cbp->next;
      pkg_free( cbp_tmp );
   }
}


/*! register a SL callback */
int register_slcb(unsigned int types, sl_cb_t f, void *param )
{
   struct sl_callback *cbp;

   /* build a new callback structure */
   if (!(cbp=pkg_malloc( sizeof( struct sl_callback)))) {
      LM_ERR("out of pkg. mem\n");
      return -1;
   }

   /* fill it up */
   cbp->types = types;
   cbp->callback = f;
   cbp->param = param;
   /* link it at the beginning of the list */
   cbp->next = slcb_hl;
   slcb_hl = cbp;
   /* set next id */
   if (cbp->next)
      cbp->id = cbp->next->id+1;
   else
      cbp->id = 0;

   return 0;
}


/*! run SL callbacks */
void run_sl_callbacks( unsigned int types, struct sip_msg *req, str *buffer,
                     int code, str *reason, union sockaddr_union *to )
{
   static struct sl_cb_param cb_params;
   struct sl_callback *cbp;

   cb_params.buffer = buffer;
   cb_params.code = code;
   cb_params.reason = reason;
   cb_params.dst = to;

   for ( cbp=slcb_hl ; cbp ; cbp=cbp->next ) {
      if (types&cbp->types) {
         cb_params.param = cbp->param;
         LM_DBG("callback id %d entered\n", cbp->id );
            cbp->callback( types&cbp->types, req, &cb_params);
      }
   }
}