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/*
* $Id$
*
* Copyright (C) 2012 Smile Communications, jason.penton@smilecoms.com
* Copyright (C) 2012 Smile Communications, richard.good@smilecoms.com
*
* The initial version of this code was written by Dragos Vingarzan
* (dragos(dot)vingarzan(at)fokus(dot)fraunhofer(dot)de and the
* Fruanhofer Institute. It was and still is maintained in a separate
* branch of the original SER. We are therefore migrating it to
* Kamailio/SR and look forward to maintaining it from here on out.
* 2011/2012 Smile Communications, Pty. Ltd.
* ported/maintained/improved by
* Jason Penton (jason(dot)penton(at)smilecoms.com and
* Richard Good (richard(dot)good(at)smilecoms.com) as part of an
* effort to add full IMS support to Kamailio/SR using a new and
* improved architecture
*
* NB: Alot of this code was originally part of OpenIMSCore,
* FhG Fokus.
* Copyright (C) 2004-2006 FhG Fokus
* Thanks for great work! This is an effort to
* break apart the various CSCF functions into logically separate
* components. We hope this will drive wider use. We also feel
* that in this way the architecture is more complete and thereby easier
* to manage in the Kamailio/SR environment
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*
* History:
* --------
* 2004-03-16 created (bogdan)
*/
/*! \file
* \brief USRLOC - Callback functions
* \ingroup usrloc
*
* - Module: \ref usrloc
*/
#include <stdlib.h>
#include "../../dprint.h"
#include "../../error.h"
#include "../../mem/shm_mem.h"
#include "ul_callback.h"
#include "ucontact.h"
struct ulcb_head_list* ulcb_list = 0;
int init_ulcb_list(void)
{
ulcb_list = (struct ulcb_head_list*)shm_malloc
( sizeof(struct ulcb_head_list) );
if (ulcb_list==0) {
LM_CRIT("no more shared mem\n");
return -1;
}
ulcb_list->first = 0;
ulcb_list->reg_types = 0;
return 1;
}
void destroy_ulcb_list(void)
{
struct ul_callback *cbp, *cbp_tmp;
if (!ulcb_list)
return;
for( cbp=ulcb_list->first; cbp ; ) {
cbp_tmp = cbp;
cbp = cbp->next;
if (cbp_tmp->param) shm_free( cbp_tmp->param );
shm_free( cbp_tmp );
}
shm_free(ulcb_list);
}
/*! \brief
register a callback function 'f' for 'types' mask of events;
*/
int register_ulcb( struct impurecord* r, struct ucontact* c, int types, ul_cb f, void *param )
{
struct ul_callback *cbp;
int contact_cb=0;
int impurecord_cb=0;
struct ulcb_head_list* cb_list=0;
if (types & UL_IMPU_INSERT) {
if (types != UL_IMPU_INSERT) {
LM_CRIT("UL_IMPU_INSERT type must be registered alone!\n");
return -1;
}
cb_list = ulcb_list;
} else if (types & UL_CONTACT_INSERT) {
if (types != UL_CONTACT_INSERT) {
LM_CRIT("UL_CONTACT_INSERT type must be registered alone!\n");
return -1;
}
cb_list = ulcb_list;
} else {
contact_cb = (types & UL_CONTACT_DELETE)
|| (types & UL_CONTACT_EXPIRE) || (types & UL_CONTACT_UPDATE);
impurecord_cb = (types & UL_IMPU_DELETE)
|| (types & UL_IMPU_UPDATE)
|| (types & UL_IMPU_REG_NC_DELETE)
|| (types & UL_IMPU_NR_DELETE)
|| (types & UL_IMPU_UNREG_EXPIRED)
|| (types & UL_IMPU_UPDATE_CONTACT)
|| (types & UL_IMPU_DELETE_CONTACT)
|| (types & UL_IMPU_EXPIRE_CONTACT)
|| (types & UL_IMPU_NEW_CONTACT);
if (contact_cb && impurecord_cb) {
LM_CRIT("can't register IMPU and Contact callback in same call\n");
return -1;
}
if (contact_cb && !c) {
LM_CRIT("no contact provided for contact callback\n");
return -1;
}
if (impurecord_cb && !r) {
LM_CRIT("no impurecord provided for contact callback\n");
return -1;
}
}
/* are the callback types valid?... */
if ( types<0 || types>ULCB_MAX ) {
LM_CRIT("invalid callback types: mask=%d\n",types);
return E_BUG;
}
/* we don't register null functions */
if (f==0) {
LM_CRIT("null callback function\n");
return E_BUG;
}
if (contact_cb) {
LM_DBG("installing callback for SCSCF contact with type [%d]\n", types);
cb_list = c->cbs;
} else if (impurecord_cb) {
LM_DBG("installing callback for SCSCF IMPU record with type [%d]\n", types);
cb_list = r->cbs;
}
/* build a new callback structure */
if (!(cbp=(struct ul_callback*)shm_malloc(sizeof( struct ul_callback)))) {
LM_ERR("no more share mem\n");
return E_OUT_OF_MEM;
}
/* link it into the proper place... */
cbp->next = cb_list->first;
cb_list->first = cbp;
cb_list->reg_types |= types;
/* ... and fill it up */
cbp->callback = f;
cbp->param = param;
cbp->types = types;
if (cbp->next)
cbp->id = cbp->next->id+1;
else
cbp->id = 0;
return 1;
}
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