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kamailio/modules/ims_qos/rx_aar.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
*
*
*
* History:
* --------
* 2011-02-02 initial version (jason.penton)
*/
#include "../../mem/shm_mem.h"
#include "../../parser/sdp/sdp.h"
#include "../cdp_avp/mod_export.h"
#include "../../modules/ims_dialog/dlg_load.h"
#include "../../modules/tm/tm_load.h"
#include "../ims_usrloc_pcscf/usrloc.h"
#include "rx_authdata.h"
#include "rx_aar.h"
#include "rx_avp.h"
#include "../../lib/ims/ims_getters.h"
#include "mod.h"
#include "../../lib/ims/useful_defs.h"
#include "ims_qos_stats.h"
#define macro_name(_rc) #_rc
//extern struct tm_binds tmb;
usrloc_api_t ul;
extern struct ims_qos_counters_h ims_qos_cnts_h;
extern int authorize_video_flow;
str IMS_Serv_AVP_val = {"IMS Services", 12};
str IMS_Em_Serv_AVP_val = {"Emergency IMS Call", 18};
str IMS_Reg_AVP_val = {"IMS Registration", 16};
static void free_dialog_data(void *data) {
str *rx_session_id = (str*) data;
if (rx_session_id) {
if (rx_session_id->s) {
shm_free(rx_session_id->s);
rx_session_id->s = 0;
}
shm_free(rx_session_id);
rx_session_id = 0;
}
}
void async_aar_callback(int is_timeout, void *param, AAAMessage *aaa, long elapsed_msecs) {
struct cell *t = 0;
unsigned int cdp_result;
int result = CSCF_RETURN_ERROR;
LM_DBG("Received AAR callback\n");
saved_transaction_t* data = (saved_transaction_t*) param;
LM_DBG("received AAA answer");
if (tmb.t_lookup_ident(&t, data->tindex, data->tlabel) < 0) {
LM_ERR("t_continue: transaction not found\n");
goto error;
} else {
LM_DBG("t_continue: transaction found\n");
}
//we have T, lets restore our state (esp. for AVPs)
set_avp_list(AVP_TRACK_FROM | AVP_CLASS_URI, &t->uri_avps_from);
set_avp_list(AVP_TRACK_TO | AVP_CLASS_URI, &t->uri_avps_to);
set_avp_list(AVP_TRACK_FROM | AVP_CLASS_USER, &t->user_avps_from);
set_avp_list(AVP_TRACK_TO | AVP_CLASS_USER, &t->user_avps_to);
set_avp_list(AVP_TRACK_FROM | AVP_CLASS_DOMAIN, &t->domain_avps_from);
set_avp_list(AVP_TRACK_TO | AVP_CLASS_DOMAIN, &t->domain_avps_to);
if (is_timeout != 0) {
LM_ERR("Error timeout when sending AAR message via CDP\n");
counter_inc(ims_qos_cnts_h.media_aar_timeouts);
goto error;
}
if (!aaa) {
LM_ERR("Error sending message via CDP\n");
goto error;
}
counter_inc(ims_qos_cnts_h.media_aars);
counter_add(ims_qos_cnts_h.media_aar_response_time, elapsed_msecs);
counter_inc(ims_qos_cnts_h.media_aar_replies_received);
/* Process the response to AAR, retrieving result code and associated Rx session ID */
if (rx_process_aaa(aaa, &cdp_result) < 0) {
LM_ERR("Failed to process AAA from PCRF\n"); //puri.host.len, puri.host.s);
goto error;
}
if (cdp_result >= 2000 && cdp_result < 3000) {
LM_DBG("Success, received code: [%i] from PCRF for AAR request\n", cdp_result);
counter_inc(ims_qos_cnts_h.successful_media_aars);
LM_DBG("Auth session ID [%.*s]", aaa->sessionId->data.len, aaa->sessionId->data.s);
if(!data->aar_update) {
LM_DBG("This is an AAA response to an initial AAR");
counter_inc(ims_qos_cnts_h.active_media_rx_sessions);
str * passed_rx_session_id = shm_malloc(sizeof (struct _str));
passed_rx_session_id->s = 0;
passed_rx_session_id->len = 0;
STR_SHM_DUP(*passed_rx_session_id, aaa->sessionId->data, "cb_passed_rx_session_id");
LM_DBG("passed rx session id [%.*s]", passed_rx_session_id->len, passed_rx_session_id->s);
dlgb.register_dlgcb_nodlg(&data->callid, &data->ftag, &data->ttag, DLGCB_TERMINATED | DLGCB_DESTROY | DLGCB_EXPIRED | DLGCB_RESPONSE_WITHIN | DLGCB_CONFIRMED | DLGCB_FAILED, callback_dialog, (void*) (passed_rx_session_id), free_dialog_data);
}
result = CSCF_RETURN_TRUE;
} else {
LM_DBG("Received negative reply from PCRF for AAR Request\n");
counter_inc(ims_qos_cnts_h.failed_media_aars);
//we don't free rx_authdata_p here - it is free-ed when the CDP session expires
goto error; // if its not a success then that means i want to reject this call!
}
//set success response code AVP
create_return_code(result);
goto done;
out_of_memory:
error :
//set failure response code
create_return_code(result);
done:
if (t) tmb.unref_cell(t);
//free memory
if (aaa)
cdpb.AAAFreeMessage(&aaa);
tmb.t_continue(data->tindex, data->tlabel, data->act);
free_saved_transaction_global_data(data);
}
void async_aar_reg_callback(int is_timeout, void *param, AAAMessage *aaa, long elapsed_msecs) {
struct cell *t = 0;
pcontact_t* pcontact;
unsigned int cdp_result;
struct pcontact_info ci;
udomain_t* domain_t;
int finalReply = 0;
AAASession *auth = 0;
rx_authsessiondata_t* p_session_data = 0;
int result = CSCF_RETURN_ERROR;
pcontact_info_t contact_info;
LM_DBG("Received AAR callback\n");
saved_transaction_local_t* local_data = (saved_transaction_local_t*) param;
saved_transaction_t* data = local_data->global_data;
domain_t = data->domain;
int is_rereg = local_data->is_rereg;
//before we do anything else, lets decrement the reference counter on replies
lock_get(data->lock);
data->answers_not_received--;
if (data->answers_not_received <= 0) {
finalReply = 1;
}
if (data->ignore_replies) { //there was obv. a subsequent error AFTER we had sent one/more AAR's - so we can ignore these replies and just free memory
free_saved_transaction_data(local_data);
if (finalReply) {
free_saved_transaction_global_data(data);
}
return;
}
lock_release(data->lock);
LM_DBG("received answer and we are waiting for [%d] answers so far failures flag is [%d]\n", data->answers_not_received, data->failed);
if (tmb.t_lookup_ident(&t, data->tindex, data->tlabel) < 0) {
LM_ERR("t_continue: transaction not found\n");
goto error;
}
//we have T, lets restore our state (esp. for AVPs)
set_avp_list(AVP_TRACK_FROM | AVP_CLASS_URI, &t->uri_avps_from);
set_avp_list(AVP_TRACK_TO | AVP_CLASS_URI, &t->uri_avps_to);
set_avp_list(AVP_TRACK_FROM | AVP_CLASS_USER, &t->user_avps_from);
set_avp_list(AVP_TRACK_TO | AVP_CLASS_USER, &t->user_avps_to);
set_avp_list(AVP_TRACK_FROM | AVP_CLASS_DOMAIN, &t->domain_avps_from);
set_avp_list(AVP_TRACK_TO | AVP_CLASS_DOMAIN, &t->domain_avps_to);
if (is_timeout != 0) {
LM_ERR("Error timeout when sending AAR message via CDP\n");
counter_inc(ims_qos_cnts_h.registration_aar_timeouts);
goto error;
}
if (!aaa) {
LM_ERR("Error sending message via CDP\n");
goto error;
}
counter_inc(ims_qos_cnts_h.registration_aars);
counter_add(ims_qos_cnts_h.registration_aar_response_time, elapsed_msecs);
counter_inc(ims_qos_cnts_h.registration_aar_replies_received);
/* Process the response to AAR, retrieving result code and associated Rx session ID */
if (rx_process_aaa(aaa, &cdp_result) < 0) {
LM_ERR("Failed to process AAA from PCRF\n"); //puri.host.len, puri.host.s);
goto error;
}
if (cdp_result >= 2000 && cdp_result < 3000) {
counter_inc(ims_qos_cnts_h.successful_registration_aars);
if (is_rereg) {
LM_DBG("this is a re-registration, therefore we don't need to do anything except know that the the subscription was successful\n");
result = CSCF_RETURN_TRUE;
create_return_code(result);
goto done;
}
//need to set Rx auth data to say this session has been successfully opened
//This is used elsewhere to prevent acting on termination events when the session has not been opened
//getting auth session
auth = cdpb.AAAGetAuthSession(aaa->sessionId->data);
if (!auth) {
LM_DBG("Could not get Auth Session for session id: [%.*s]\n", aaa->sessionId->data.len, aaa->sessionId->data.s);
goto error;
}
//getting session data
p_session_data = (rx_authsessiondata_t*) auth->u.auth.generic_data;
if (!p_session_data) {
LM_DBG("Could not get session data on Auth Session for session id: [%.*s]\n", aaa->sessionId->data.len, aaa->sessionId->data.s);
if (auth) cdpb.AAASessionsUnlock(auth->hash);
goto error;
}
p_session_data->session_has_been_opened = 1;
counter_inc(ims_qos_cnts_h.active_registration_rx_sessions);
if (auth) cdpb.AAASessionsUnlock(auth->hash);
LM_DBG("Success, received code: [%i] from PCRF for AAR request (contact: [%.*s]), (auth session id: %.*s)\n",
cdp_result, local_data->contact.len, local_data->contact.s,
local_data->auth_session_id.len, local_data->auth_session_id.s);
LM_DBG("Registering for Usrloc callbacks on DELETE\n");
ul.lock_udomain(domain_t, &local_data->via_host, local_data->via_port, local_data->via_proto);
contact_info.received_host = local_data->recv_host;
contact_info.received_port = local_data->recv_port;
contact_info.received_proto = local_data->recv_proto;
contact_info.searchflag = (1 << SEARCH_RECEIVED);
contact_info.aor = local_data->contact;
contact_info.via_host = local_data->via_host;
contact_info.via_port = local_data->via_port;
contact_info.via_prot = local_data->via_proto;
contact_info.reg_state = PCONTACT_ANY;
if (ul.get_pcontact(domain_t, &contact_info, &pcontact) != 0) {
LM_ERR("Shouldn't get here, can't find contact....\n");
ul.unlock_udomain(domain_t, &local_data->via_host, local_data->via_port, local_data->via_proto);
goto error;
}
//at this point we have the contact
/*set the contact state to say we have succesfully done ARR for register and that we dont need to do it again
* for the duration of the registration.
* */
if (ul.update_rx_regsession(domain_t, &local_data->auth_session_id, pcontact) != 0) {
LM_ERR("unable to update pcontact......\n");
ul.unlock_udomain(domain_t, &local_data->via_host, local_data->via_port, local_data->via_proto);
goto error;
}
memset(&ci, 0, sizeof (struct pcontact_info));
ci.reg_state = PCONTACT_REG_PENDING_AAR;
ci.num_service_routes = 0;
ci.num_public_ids = 0;
LM_DBG("impu: [%.*s] updating status to PCONTACT_REG_PENDING\n", pcontact->aor.len, pcontact->aor.s);
ul.update_pcontact(domain_t, &ci, pcontact);
//register for callbacks on contact
ul.register_ulcb(pcontact, PCSCF_CONTACT_DELETE | PCSCF_CONTACT_EXPIRE,
callback_pcscf_contact_cb, NULL);
ul.unlock_udomain(domain_t, &local_data->via_host, local_data->via_port, local_data->via_proto);
result = CSCF_RETURN_TRUE;
} else {
LM_DBG("Received negative reply from PCRF for AAR Request\n");
counter_inc(ims_qos_cnts_h.failed_registration_aars);
result = CSCF_RETURN_FALSE;
goto error;
}
//set success response code AVP
create_return_code(result);
goto done;
error:
//set failure response code
create_return_code(result);
done:
if (t) tmb.unref_cell(t);
//free memory
if (aaa)
cdpb.AAAFreeMessage(&aaa);
if (finalReply) {
tmb.t_continue(data->tindex, data->tlabel, data->act);
free_saved_transaction_global_data(data);
}
free_saved_transaction_data(local_data);
}
/* handle an AAA response to an AAR for resource reservation for a successful registration or initiated/updated dialog
* @param aaa - the diameter reply
* @return - 1 if result code found and processing ok, -1 if error
*/
int rx_process_aaa(AAAMessage *aaa, unsigned int * rc) {
int ret = 1;
ret = rx_get_result_code(aaa, rc);
if (ret == 0) {
LM_DBG("AAA message without result code\n");
return ret;
}
return ret;
}
/** Helper function for adding media component AVPs - uses previously stored flow descriptions not SDP from messages*/
int add_media_components_using_current_flow_description(AAAMessage* aar, rx_authsessiondata_t *p_session_data) {
flow_description_t *flow_description;
int add_flow = 1;
flow_description = p_session_data->first_current_flow_description;
if(!flow_description) {
return -1;
}
while (flow_description) {
if(!authorize_video_flow) {
if (strncmp(flow_description->media.s, "video", 5) == 0) {
add_flow = 0;
}
}
if(add_flow) {
rx_add_media_component_description_avp(aar, flow_description->stream_num,
&flow_description->media, &flow_description->req_sdp_ip_addr,
&flow_description->req_sdp_port, &flow_description->rpl_sdp_ip_addr,
&flow_description->rpl_sdp_port, &flow_description->rpl_sdp_transport,
&flow_description->req_sdp_raw_stream,
&flow_description->rpl_sdp_raw_stream, flow_description->direction);
}
flow_description = flow_description->next;
add_flow = 1;
}
return 0;
}
/** Helper function for adding media component AVPs for each SDP stream*/
int add_media_components(AAAMessage* aar, struct sip_msg *req,
struct sip_msg *rpl, enum dialog_direction direction, AAASession* auth) {
int sdp_session_num;
int sdp_stream_num;
sdp_session_cell_t* req_sdp_session, *rpl_sdp_session;
sdp_stream_cell_t* req_sdp_stream, *rpl_sdp_stream;
int add_flow = 1;
if (!req || !rpl) {
return CSCF_RETURN_FALSE;
}
if (parse_sdp(req) < 0) {
LM_ERR("Unable to parse req SDP\n");
return CSCF_RETURN_FALSE;
}
if (parse_sdp(rpl) < 0) {
LM_ERR("Unable to parse res SDP\n");
return CSCF_RETURN_FALSE;
}
sdp_session_num = 0;
//Loop through req sessions and streams and get corresponding rpl sessions and streams and populate avps
for (;;) {
//we only cater for one session at the moment: TDOD: extend
if (sdp_session_num > 0) {
break;
}
req_sdp_session = get_sdp_session(req, sdp_session_num);
rpl_sdp_session = get_sdp_session(rpl, sdp_session_num);
if (!req_sdp_session || !rpl_sdp_session) {
if (!req_sdp_session)
LM_ERR("Missing SDP session information from req\n");
if (!rpl_sdp_session)
LM_ERR("Missing SDP session information from rpl\n");
break;
}
sdp_stream_num = 0;
for (;;) {
req_sdp_stream = get_sdp_stream(req, sdp_session_num,
sdp_stream_num);
rpl_sdp_stream = get_sdp_stream(rpl, sdp_session_num,
sdp_stream_num);
if (!req_sdp_stream || !rpl_sdp_stream) {
//LM_ERR("Missing SDP stream information\n");
break;
}
//is this a stream to add to AAR.
if (req_sdp_stream->is_rtp) {
//check if the src or dst port is 0 and if so then don't add to rx
int intportA = atoi(req_sdp_stream->port.s);
int intportB = atoi(rpl_sdp_stream->port.s);
if(intportA != 0 && intportB != 0){
if(!authorize_video_flow) {
if (strncmp(req_sdp_stream->media.s, "video", 5) == 0) {
add_flow = 0;
}
}
if(add_flow) {
//add this to auth session data
add_flow_description((rx_authsessiondata_t*) auth->u.auth.generic_data, sdp_stream_num + 1,
&req_sdp_stream->media, &req_sdp_session->ip_addr,
&req_sdp_stream->port, &rpl_sdp_session->ip_addr,
&rpl_sdp_stream->port, &rpl_sdp_stream->transport,
&req_sdp_stream->raw_stream,
&rpl_sdp_stream->raw_stream, direction, 0 /*This is a new mcd, we are not setting it as active*/);
rx_add_media_component_description_avp(aar, sdp_stream_num + 1,
&req_sdp_stream->media, &req_sdp_session->ip_addr,
&req_sdp_stream->port, &rpl_sdp_session->ip_addr,
&rpl_sdp_stream->port, &rpl_sdp_stream->transport,
&req_sdp_stream->raw_stream,
&rpl_sdp_stream->raw_stream, direction);
}
add_flow = 1;
}
}
sdp_stream_num++;
}
sdp_session_num++;
}
free_sdp((sdp_info_t**) (void*) &req->body);
free_sdp((sdp_info_t**) (void*) &rpl->body);
return 0;
}
/**
* Sends the Authorization Authentication Request - specifically this is an asynchronous AAR sent if another update adding video has failed so we need to remove video
*/
int rx_send_aar_update_no_video(AAASession* auth) {
AAAMessage* aar = 0;
str identifier;
int identifier_type;
AAA_AVP* avp = 0;
char x[4];
int ret = 0;
str recv_ip;
uint16_t ip_version;
//we get ip and identifier for the auth session data
rx_authsessiondata_t* p_session_data = 0;
p_session_data = (rx_authsessiondata_t*) auth->u.auth.generic_data;
identifier = p_session_data->identifier;
identifier_type = p_session_data->identifier_type;
recv_ip = p_session_data->ip;
ip_version = p_session_data->ip_version;
aar = cdpb.AAACreateRequest(IMS_Rx, IMS_AAR, Flag_Proxyable, auth);
LM_DBG("Sending AAR update to remove a video bearer\n");
show_callsessiondata(p_session_data);
if (!aar)
goto error;
/*Adding AVPs*/
LM_DBG("Adding auth app id AVP...\n");
/* Add Auth-Application-Id AVP */
if (!rx_add_auth_application_id_avp(aar, IMS_Rx))
goto error;
if (!rx_add_vendor_specific_application_id_group(aar, IMS_vendor_id_3GPP,
IMS_Rx))
goto error;
LM_DBG("Adding dest realm if not there already...\n");
/* Add Destination-Realm AVP, if not already there */
avp = cdpb.AAAFindMatchingAVP(aar, aar->avpList.head, AVP_Destination_Realm,
0, AAA_FORWARD_SEARCH);
if (!avp) {
str realm = rx_dest_realm;
if (realm.len && !rx_add_destination_realm_avp(aar, realm))
goto error;
}
LM_DBG("Adding AF App identifier...\n");
/* Add AF-Application-Identifier AVP */
str af_id = {0, 0};
af_id = IMS_Serv_AVP_val;
if (!rx_add_avp(aar, af_id.s, af_id.len, AVP_IMS_AF_Application_Identifier,
AAA_AVP_FLAG_MANDATORY, IMS_vendor_id_3GPP, AVP_DUPLICATE_DATA,
__FUNCTION__))
goto error;
LM_DBG("Adding service info status...\n");
/* Add Service-Info-Status AVP, if prelimiary
* by default(when absent): final status is considered*/
set_4bytes(x,
AVP_EPC_Service_Info_Status_Preliminary_Service_Information);
if (!rx_add_avp(aar, x, 4, AVP_IMS_Service_Info_Status,
AAA_AVP_FLAG_MANDATORY, IMS_vendor_id_3GPP, AVP_DUPLICATE_DATA,
__FUNCTION__))
goto error;
/* Add Auth lifetime AVP */LM_DBG("auth_lifetime %u\n", rx_auth_expiry); //TODO check why this is 0 all the time
if (rx_auth_expiry) {
set_4bytes(x, rx_auth_expiry);
if (!rx_add_avp(aar, x, 4, AVP_Authorization_Lifetime,
AAA_AVP_FLAG_MANDATORY, 0, AVP_DUPLICATE_DATA, __FUNCTION__))
goto error;
}
LM_DBG("Adding subscription id...\n");
rx_add_subscription_id_avp(aar, identifier, identifier_type);
LM_DBG("Adding reservation priority...\n");
/* Add Reservation Priority AVP*/
set_4bytes(x, 0);
if (!rx_add_avp(aar, x, 4, AVP_ETSI_Reservation_Priority,
AAA_AVP_FLAG_VENDOR_SPECIFIC, IMS_vendor_id_ETSI,
AVP_DUPLICATE_DATA, __FUNCTION__))
goto error;
LM_DBG("Adding media component...\n");
//Note we add this AVP first as it gets the IP address which we need to create the auth session
//Could and maybe should have a separate method that retrieves the IP from SDP - TODO
/*---------- 2. Create and add Media-Component-Description AVP ----------*/
/*
* See 3GPP TS29214
*
* <Media-Component-Description> = {Media-Component-Number}
* [Media-Sub-Component]
* [AF-Application-Identifier]
* [Media-Type]
* [Max-Requested-Bandwidth-UL]
* [Max-Requested-Bandwidth-DL]
* [Flow-Status]
* [Reservation-Priority] (Not used yet)
* [RS-Bandwidth]
* [RR-Bandwidth]
* *[Codec-Data]
*/
add_media_components_using_current_flow_description(aar, p_session_data);
LM_DBG("Adding framed ip address [%.*s]\n", recv_ip.len, recv_ip.s);
/* Add Framed IP address AVP*/
if (!rx_add_framed_ip_avp(&aar->avpList, recv_ip, ip_version)) {
LM_ERR("Unable to add framed IP AVP\n");
goto error;
}
LM_DBG("Unlocking AAA session...\n");
if (auth)
cdpb.AAASessionsUnlock(auth->hash);
LM_DBG("sending AAR to PCRF\n");
if (rx_forced_peer.len)
ret = cdpb.AAASendMessageToPeer(aar, &rx_forced_peer,
NULL, NULL);
else
ret = cdpb.AAASendMessage(aar, NULL,
NULL);
return ret;
error:
LM_ERR("unexpected error\n");
if (aar)
cdpb.AAAFreeMessage(&aar);
if (auth) {
cdpb.AAASessionsUnlock(auth->hash);
cdpb.AAADropAuthSession(auth);
auth = 0;
}
return ret;
}
/**
* Sends the Authorization Authentication Request.
* @param req - SIP request
* @param res - SIP response
* @param direction - 0/o/orig for originating side, 1/t/term for terminating side
* @param rx_auth_data - the returned rx auth data
* @returns AAA message or NULL on error
*/
int rx_send_aar(struct sip_msg *req, struct sip_msg *res,
AAASession* auth, char* direction, saved_transaction_t* saved_t_data) {
AAAMessage* aar = 0;
str identifier;
int identifier_type;
AAA_AVP* avp = 0;
char x[4];
int ret = 0;
str ip;
uint16_t ip_version;
//we get ip and identifier for the auth session data
rx_authsessiondata_t* p_session_data = 0;
p_session_data = (rx_authsessiondata_t*) auth->u.auth.generic_data;
identifier = p_session_data->identifier;
identifier_type = p_session_data->identifier_type;
ip = p_session_data->ip;
ip_version = p_session_data->ip_version;
/* find direction for AAR (orig/term) */
//need this to add the media component details
enum dialog_direction dlg_direction = get_dialog_direction(direction);
if (dlg_direction == DLG_MOBILE_UNKNOWN) {
LM_DBG("Asked to send AAR for unknown direction.....Aborting...\n");
goto error;
}
aar = cdpb.AAACreateRequest(IMS_Rx, IMS_AAR, Flag_Proxyable, auth);
LM_DBG("Created aar request...\n");
if (!aar)
goto error;
/*Adding AVPs*/
LM_DBG("Adding auth app id AVP...\n");
/* Add Auth-Application-Id AVP */
if (!rx_add_auth_application_id_avp(aar, IMS_Rx))
goto error;
if (!rx_add_vendor_specific_application_id_group(aar, IMS_vendor_id_3GPP,
IMS_Rx))
goto error;
LM_DBG("Adding dest realm if not there already...\n");
/* Add Destination-Realm AVP, if not already there */
avp = cdpb.AAAFindMatchingAVP(aar, aar->avpList.head, AVP_Destination_Realm,
0, AAA_FORWARD_SEARCH);
if (!avp) {
str realm = rx_dest_realm;
if (realm.len && !rx_add_destination_realm_avp(aar, realm))
goto error;
}
LM_DBG("Adding AF App identifier...\n");
/* Add AF-Application-Identifier AVP */
str af_id = {0, 0};
af_id = IMS_Serv_AVP_val;
if (!rx_add_avp(aar, af_id.s, af_id.len, AVP_IMS_AF_Application_Identifier,
AAA_AVP_FLAG_MANDATORY, IMS_vendor_id_3GPP, AVP_DUPLICATE_DATA,
__FUNCTION__))
goto error;
LM_DBG("Adding service info status...\n");
/* Add Service-Info-Status AVP, if prelimiary
* by default(when absent): final status is considered*/
if (!res) {
set_4bytes(x,
AVP_EPC_Service_Info_Status_Preliminary_Service_Information);
if (!rx_add_avp(aar, x, 4, AVP_IMS_Service_Info_Status,
AAA_AVP_FLAG_MANDATORY, IMS_vendor_id_3GPP, AVP_DUPLICATE_DATA,
__FUNCTION__))
goto error;
}
/* Add Auth lifetime AVP */LM_DBG("auth_lifetime %u\n", rx_auth_expiry); //TODO check why this is 0 all the time
if (rx_auth_expiry) {
set_4bytes(x, rx_auth_expiry);
if (!rx_add_avp(aar, x, 4, AVP_Authorization_Lifetime,
AAA_AVP_FLAG_MANDATORY, 0, AVP_DUPLICATE_DATA, __FUNCTION__))
goto error;
}
LM_DBG("Adding subscription id...\n");
rx_add_subscription_id_avp(aar, identifier, identifier_type);
LM_DBG("Adding reservation priority...\n");
/* Add Reservation Priority AVP*/
set_4bytes(x, 0);
if (!rx_add_avp(aar, x, 4, AVP_ETSI_Reservation_Priority,
AAA_AVP_FLAG_VENDOR_SPECIFIC, IMS_vendor_id_ETSI,
AVP_DUPLICATE_DATA, __FUNCTION__))
goto error;
LM_DBG("Adding media component...\n");
//Note we add this AVP first as it gets the IP address which we need to create the auth session
//Could and maybe should have a separate method that retrieves the IP from SDP - TODO
/*---------- 2. Create and add Media-Component-Description AVP ----------*/
/*
* See 3GPP TS29214
*
* <Media-Component-Description> = {Media-Component-Number}
* [Media-Sub-Component]
* [AF-Application-Identifier]
* [Media-Type]
* [Max-Requested-Bandwidth-UL]
* [Max-Requested-Bandwidth-DL]
* [Flow-Status]
* [Reservation-Priority] (Not used yet)
* [RS-Bandwidth]
* [RR-Bandwidth]
* *[Codec-Data]
*/
add_media_components(aar, req, res, dlg_direction, auth);
LM_DBG("Adding framed ip address [%.*s]\n", ip.len, ip.s);
/* Add Framed IP address AVP*/
if (!rx_add_framed_ip_avp(&aar->avpList, ip, ip_version)) {
LM_ERR("Unable to add framed IP AVP\n");
goto error;
}
/* Add specific action AVP's */
rx_add_specific_action_avp(aar, 1); // CHARGING_CORRELATION_EXCHANGE
rx_add_specific_action_avp(aar, 2); // INDICATION_OF_LOSS_OF_BEARER
rx_add_specific_action_avp(aar, 3); // INDICATION_RECOVERY_OF_BEARER
rx_add_specific_action_avp(aar, 4); // INDICATION_RELEASE_OF_BEARER
rx_add_specific_action_avp(aar, 5); // INDICATION_ESTABLISHMENT_OF_BEARER (now void)
rx_add_specific_action_avp(aar, 6); // IP-CAN_CHANGE
rx_add_specific_action_avp(aar, 12); // ACCESS_NETWORK_INFO_REPORT
show_callsessiondata(p_session_data);
LM_DBG("Unlocking AAA session...\n");
if (auth)
cdpb.AAASessionsUnlock(auth->hash);
LM_DBG("sending AAR to PCRF\n");
if (rx_forced_peer.len)
ret = cdpb.AAASendMessageToPeer(aar, &rx_forced_peer,
(void*) async_aar_callback, (void*) saved_t_data);
else
ret = cdpb.AAASendMessage(aar, (void*) async_aar_callback,
(void*) saved_t_data);
return ret;
error:
LM_ERR("unexpected error\n");
if (aar)
cdpb.AAAFreeMessage(&aar);
if (auth) {
cdpb.AAASessionsUnlock(auth->hash);
cdpb.AAADropAuthSession(auth);
auth = 0;
}
return ret;
}
/**
* Sends the Authorization Authentication Request for Register messages
* @param req - SIP Register msg
* @param rx_auth_data - the returned rx auth data
* @param ip - ip address extracted from contact to register
* @param ip_version - AF_INET or AF_INET6
* @returns int >0 if sent AAR successfully, otherwise 0
*/
int rx_send_aar_register(struct sip_msg *msg, AAASession* auth, saved_transaction_local_t* saved_t_data) {
AAAMessage* aar = 0;
int ret = 0;
AAA_AVP* avp = 0;
char x[4];
str identifier;
str ip;
uint16_t ip_version;
//we get ip and identifier for the auth session data
rx_authsessiondata_t* p_session_data = 0;
p_session_data = (rx_authsessiondata_t*) auth->u.auth.generic_data;
identifier = p_session_data->identifier;
ip = p_session_data->ip;
ip_version = p_session_data->ip_version;
LM_DBG("Send AAR register\n");
aar = cdpb.AAACreateRequest(IMS_Rx, IMS_AAR, Flag_Proxyable, auth);
if (!aar)
goto error;
/*Add AVPs*/
/* Add Auth-Application-Id AVP */
if (!rx_add_auth_application_id_avp(aar, IMS_Rx))
goto error;
if (!rx_add_vendor_specific_application_id_group(aar, IMS_vendor_id_3GPP,
IMS_Rx))
goto error;
/* Add Destination-Realm AVP, if not already there */
avp = cdpb.AAAFindMatchingAVP(aar, aar->avpList.head, AVP_Destination_Realm,
0, AAA_FORWARD_SEARCH);
if (!avp) {
str realm = rx_dest_realm;
if (realm.len && !rx_add_destination_realm_avp(aar, realm))
goto error;
}
/* Add Subscription ID AVP*/
identifier = cscf_get_public_identity(msg);
int identifier_type = AVP_Subscription_Id_Type_SIP_URI; //we only do IMPU now
rx_add_subscription_id_avp(aar, identifier, identifier_type);
/* Add media component description avp for register*/
rx_add_media_component_description_avp_register(aar);
/* Add specific action AVP's */
rx_add_specific_action_avp(aar, 1); // CHARGING_CORRELATION_EXCHANGE
rx_add_specific_action_avp(aar, 2); // INDICATION_OF_LOSS_OF_BEARER
rx_add_specific_action_avp(aar, 3); // INDICATION_RECOVERY_OF_BEARER
rx_add_specific_action_avp(aar, 4); // INDICATION_RELEASE_OF_BEARER
rx_add_specific_action_avp(aar, 5); // INDICATION_ESTABLISHMENT_OF_BEARER (now void)
rx_add_specific_action_avp(aar, 6); // IP-CAN_CHANGE
rx_add_specific_action_avp(aar, 12); // ACCESS_NETWORK_INFO_REPORT
/* Add Framed IP address AVP*/
if (!rx_add_framed_ip_avp(&aar->avpList, ip, ip_version)) {
LM_ERR("Unable to add framed IP AVP\n");
goto error;
}
/* Add Auth lifetime AVP */LM_DBG("auth_lifetime %u\n", rx_auth_expiry); //TODO check why this is 0 all the time
if (rx_auth_expiry) {
set_4bytes(x, rx_auth_expiry);
if (!rx_add_avp(aar, x, 4, AVP_Authorization_Lifetime,
AAA_AVP_FLAG_MANDATORY, 0, AVP_DUPLICATE_DATA, __FUNCTION__))
goto error;
}
if (auth)
cdpb.AAASessionsUnlock(auth->hash);
LM_DBG("sending AAR to PCRF\n");
if (rx_forced_peer.len)
ret = cdpb.AAASendMessageToPeer(aar, &rx_forced_peer,
(void*) async_aar_reg_callback, (void*) saved_t_data);
else
ret = cdpb.AAASendMessage(aar, (void*) async_aar_reg_callback,
(void*) saved_t_data);
return ret;
error:
LM_ERR("unexpected error\n");
if (aar)
cdpb.AAAFreeMessage(&aar);
if (auth) {
cdpb.AAASessionsUnlock(auth->hash);
cdpb.AAADropAuthSession(auth);
auth = 0;
}
return ret;
}
enum dialog_direction get_dialog_direction(char *direction) {
if (!direction) {
LM_CRIT("Unknown direction NULL");
return DLG_MOBILE_UNKNOWN;
}
switch (direction[0]) {
case 'o':
case 'O':
case '0':
return DLG_MOBILE_ORIGINATING;
case 't':
case 'T':
case '1':
return DLG_MOBILE_TERMINATING;
default:
LM_CRIT("Unknown direction %s", direction);
return DLG_MOBILE_UNKNOWN;
}
}
void free_saved_transaction_global_data(saved_transaction_t* data) {
if (!data)
return;
if (data->callid.s && data->callid.len) {
shm_free(data->callid.s);
data->callid.len = 0;
}
if (data->ftag.s && data->ftag.len) {
shm_free(data->ftag.s);
data->ftag.len = 0;
}
if (data->ttag.s && data->ttag.len) {
shm_free(data->ttag.s);
data->ttag.len = 0;
}
if (data->lock) {
lock_dealloc(data->lock);
lock_destroy(data->lock);
}
shm_free(data);
}
void free_saved_transaction_data(saved_transaction_local_t* data) {
if (!data)
return;
shm_free(data);
}
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