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cdpeventprocessor.c
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cdpeventprocessor.c
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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
*
*/
#include <time.h>
#include "sem.h"
#include "../ims_usrloc_pcscf/usrloc.h"
#include "../ims_dialog/dlg_load.h"
#include "../cdp/session.h"
#include "ims_qos_mod.h"
#include "cdpeventprocessor.h"
#include "rx_str.h"
#include "ims_qos_stats.h"
cdp_cb_event_list_t *cdp_event_list = 0;
extern usrloc_api_t ul;
extern ims_dlg_api_t dlgb;
extern int cdp_event_latency;
extern int cdp_event_threshold;
extern int cdp_event_latency_loglevel;
extern int cdp_event_list_size_threshold;
extern struct ims_qos_counters_h ims_qos_cnts_h;
extern int terminate_dialog_on_rx_failure;
extern int delete_contact_on_rx_failure;
int init_cdp_cb_event_list()
{
cdp_event_list = shm_malloc(sizeof(cdp_cb_event_list_t));
if(!cdp_event_list) {
LM_ERR("No more SHM mem\n");
return 0;
}
memset(cdp_event_list, 0, sizeof(cdp_cb_event_list_t));
cdp_event_list->lock = lock_alloc();
if(!cdp_event_list->lock) {
LM_ERR("failed to create cdp event list lock\n");
return 0;
}
cdp_event_list->lock = lock_init(cdp_event_list->lock);
cdp_event_list->size = 0;
sem_new(cdp_event_list->empty,
0); //pre-locked - as we assume list is empty at start
return 1;
}
void destroy_cdp_cb_event_list()
{
cdp_cb_event_t *ev, *tmp;
lock_get(cdp_event_list->lock);
ev = cdp_event_list->head;
while(ev) {
tmp = ev->next;
free_cdp_cb_event(ev);
ev = tmp;
}
lock_destroy(cdp_event_list->lock);
lock_dealloc(cdp_event_list->lock);
shm_free(cdp_event_list);
}
cdp_cb_event_t *new_cdp_cb_event(
int event, str *rx_session_id, rx_authsessiondata_t *session_data)
{
cdp_cb_event_t *new_event = shm_malloc(sizeof(cdp_cb_event_t));
if(!new_event) {
LM_ERR("no more shm mem\n");
return NULL;
}
memset(new_event, 0, sizeof(cdp_cb_event_t));
//we have to make a copy of the rx session id because it is not in shm mem
if((rx_session_id->len > 0) && rx_session_id->s) {
LM_DBG("Creating new event for rx session [%.*s]\n", rx_session_id->len,
rx_session_id->s);
new_event->rx_session_id.s = (char *)shm_malloc(rx_session_id->len);
if(!new_event->rx_session_id.s) {
LM_ERR("no more shm memory\n");
shm_free(new_event);
return NULL;
}
memcpy(new_event->rx_session_id.s, rx_session_id->s,
rx_session_id->len);
new_event->rx_session_id.len = rx_session_id->len;
}
new_event->event = event;
new_event->registered = time(NULL);
new_event->session_data = session_data; //session_data is already in shm mem
return new_event;
}
//add to tail
void push_cdp_cb_event(cdp_cb_event_t *event)
{
lock_get(cdp_event_list->lock);
if(cdp_event_list->head == 0) { //empty list
cdp_event_list->head = cdp_event_list->tail = event;
} else {
cdp_event_list->tail->next = event;
cdp_event_list->tail = event;
}
cdp_event_list->size++;
if(cdp_event_list_size_threshold > 0
&& cdp_event_list->size > cdp_event_list_size_threshold) {
LM_WARN("cdp_event_list is size [%d] and has exceed "
"cdp_event_list_size_threshold of [%d]",
cdp_event_list->size, cdp_event_list_size_threshold);
}
sem_release(cdp_event_list->empty);
lock_release(cdp_event_list->lock);
}
//pop from head
cdp_cb_event_t *pop_cdp_cb_event()
{
cdp_cb_event_t *ev;
lock_get(cdp_event_list->lock);
while(cdp_event_list->head == 0) {
lock_release(cdp_event_list->lock);
sem_get(cdp_event_list->empty);
lock_get(cdp_event_list->lock);
}
ev = cdp_event_list->head;
cdp_event_list->head = ev->next;
if(ev == cdp_event_list->tail) { //list now empty
cdp_event_list->tail = 0;
}
ev->next = 0; //make sure whoever gets this can't access our list
cdp_event_list->size--;
lock_release(cdp_event_list->lock);
return ev;
}
/*main event process function*/
void cdp_cb_event_process()
{
cdp_cb_event_t *ev;
udomain_t *domain;
pcontact_t *pcontact;
pcontact_info_t contact_info;
struct pcontact_info ci;
memset(&ci, 0, sizeof(struct pcontact_info));
for(;;) {
ev = pop_cdp_cb_event();
if(cdp_event_latency) { //track delays
unsigned int diff = time(NULL) - ev->registered;
if(diff > cdp_event_threshold) {
switch(cdp_event_latency_loglevel) {
case 0:
LM_ERR("Took to long to pickup CDP callback event [%d] "
"> [%d]\n",
diff, cdp_event_threshold);
break;
case 1:
LM_WARN("Took to long to pickup CDP callback event "
"[%d] > [%d]\n",
diff, cdp_event_threshold);
break;
case 2:
LM_INFO("Took to long to pickup CDP callback event "
"[%d] > [%d]\n",
diff, cdp_event_threshold);
break;
case 3:
LM_DBG("Took to long to pickup CDP callback event [%d] "
"> [%d]\n",
diff, cdp_event_threshold);
break;
default:
LM_DBG("Unknown log level....printing as debug\n");
LM_DBG("Took to long to pickup CDP callback event [%d] "
"> [%d]\n",
diff, cdp_event_threshold);
break;
}
}
}
LM_DBG("processing event [%d]\n", ev->event);
rx_authsessiondata_t *p_session_data = ev->session_data;
str *rx_session_id = &ev->rx_session_id;
switch(ev->event) {
case AUTH_EV_SESSION_TIMEOUT:
case AUTH_EV_SESSION_GRACE_TIMEOUT:
case AUTH_EV_RECV_ASR:
LM_DBG("Received notification of ASR from transport plane or "
"CDP timeout for CDP session with Rx session ID: [%.*s] "
"and associated contact [%.*s]"
" and domain [%.*s]\n",
rx_session_id->len, rx_session_id->s,
p_session_data->registration_aor.len,
p_session_data->registration_aor.s,
p_session_data->domain.len, p_session_data->domain.s);
if(p_session_data->subscribed_to_signaling_path_status) {
LM_DBG("This is a subscription to signalling bearer "
"session");
//nothing to do here - just wait for AUTH_EV_SERVICE_TERMINATED event
} else {
LM_DBG("This is a media bearer session session");
//this is a media bearer session that was terminated from the transport plane - we need to terminate the associated dialog
//so we set p_session_data->must_terminate_dialog to 1 and when we receive AUTH_EV_SERVICE_TERMINATED event we will terminate the dialog
//we only terminate the dialog if terminate_dialog_on_rx_failure is set
if(terminate_dialog_on_rx_failure) {
p_session_data->must_terminate_dialog = 1;
}
}
break;
case AUTH_EV_SERVICE_TERMINATED:
LM_DBG("Received notification of CDP TERMINATE of CDP session "
"with Rx session ID: [%.*s] and associated contact "
"[%.*s]"
" and domain [%.*s]\n",
rx_session_id->len, rx_session_id->s,
p_session_data->registration_aor.len,
p_session_data->registration_aor.s,
p_session_data->domain.len, p_session_data->domain.s);
if(p_session_data->subscribed_to_signaling_path_status) {
LM_DBG("This is a subscription to signalling bearer "
"session");
//instead of removing the contact from usrloc_pcscf we just change the state of the contact to TERMINATE_PENDING_NOTIFY
//pcscf_registrar sees this, sends a SIP PUBLISH and on SIP NOTIFY the contact is deleted
//note we only send SIP PUBLISH if the session has been successfully opened
if(p_session_data->session_has_been_opened) {
if(delete_contact_on_rx_failure) {
if(ul.register_udomain(
p_session_data->domain.s, &domain)
< 0) {
LM_DBG("Unable to register usrloc "
"domain....aborting\n");
return;
}
ul.lock_udomain(domain, &p_session_data->via_host,
p_session_data->via_port,
p_session_data->via_proto);
contact_info.received_host = p_session_data->ip;
contact_info.received_port =
p_session_data->recv_port;
contact_info.received_proto =
p_session_data->recv_proto;
contact_info.searchflag = (1 << SEARCH_RECEIVED);
contact_info.via_host = p_session_data->via_host;
contact_info.via_port = p_session_data->via_port;
contact_info.via_prot = p_session_data->via_proto;
contact_info.aor = p_session_data->registration_aor;
contact_info.reg_state = PCONTACT_ANY;
if(ul.get_pcontact(
domain, &contact_info, &pcontact, 0)
!= 0) {
LM_DBG("no contact found for terminated Rx reg "
"session..... ignoring\n");
} else {
LM_DBG("Updating contact [%.*s] after Rx reg "
"session terminated, setting state to "
"PCONTACT_DEREG_PENDING_PUBLISH\n",
pcontact->aor.len, pcontact->aor.s);
ci.reg_state = PCONTACT_DEREG_PENDING_PUBLISH;
ci.num_service_routes = 0;
ul.update_pcontact(domain, &ci, pcontact);
}
ul.unlock_udomain(domain, &p_session_data->via_host,
p_session_data->via_port,
p_session_data->via_proto);
}
counter_add(
ims_qos_cnts_h.active_registration_rx_sessions,
-1);
}
} else {
LM_DBG("This is a media bearer session session");
if(p_session_data->session_has_been_opened) {
LM_DBG("Session was opened so decrementing "
"active_media_rx_sessions\n");
counter_add(
ims_qos_cnts_h.active_media_rx_sessions, -1);
}
//we only terminate the dialog if this was triggered from the transport plane or timeout - i.e. if must_terminate_dialog is set
//if this was triggered from the signalling plane (i.e. someone hanging up) then we don'y need to terminate the dialog
if(p_session_data->must_terminate_dialog) {
LM_DBG("Terminating dialog with callid, ftag, ttag: "
"[%.*s], [%.*s], [%.*s]\n",
p_session_data->callid.len,
p_session_data->callid.s,
p_session_data->ftag.len,
p_session_data->ftag.s,
p_session_data->ttag.len,
p_session_data->ttag.s);
dlgb.terminate_dlg(&p_session_data->callid,
&p_session_data->ftag, &p_session_data->ttag,
&confirmed_qosrelease_headers,
&early_qosrelease_reason);
}
}
//free callback data
if(p_session_data) {
free_callsessiondata(p_session_data);
}
break;
default:
break;
}
free_cdp_cb_event(ev);
}
}
void free_cdp_cb_event(cdp_cb_event_t *ev)
{
if(ev) {
LM_DBG("Freeing cdpb CB event structure\n");
if(ev->rx_session_id.len > 0 && ev->rx_session_id.s) {
LM_DBG("about to free string from cdp CB event [%.*s]\n",
ev->rx_session_id.len, ev->rx_session_id.s);
shm_free(ev->rx_session_id.s);
}
shm_free(ev);
}
}