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/*
* Kamailio osp module.
*
* This module enables Kamailio to communicate with an Open Settlement
* Protocol (OSP) server. The Open Settlement Protocol is an ETSI
* defined standard for Inter-Domain VoIP pricing, authorization
* and usage exchange. The technical specifications for OSP
* (ETSI TS 101 321 V4.1.1) are available at www.etsi.org.
*
* Uli Abend was the original contributor to this module.
*
* Copyright (C) 2001-2005 Fhg Fokus
*
* 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 "osp_mod.h"
#include "term_transaction.h"
#include "sipheader.h"
#include "destination.h"
#include "osptoolkit.h"
#include "usage.h"
extern char* _osp_device_ip;
extern int _osp_token_format;
extern int _osp_validate_callid;
extern OSPTPROVHANDLE _osp_provider;
/*
* Get OSP token
* param msg SIP message
* param ignore1
* param ignore2
* return MODULE_RETURNCODE_TRUE success, MODULE_RETURNCODE_FALSE failure
*/
int ospCheckHeader(
struct sip_msg* msg,
char* ignore1,
char* ignore2)
{
unsigned char buffer[OSP_TOKENBUF_SIZE];
unsigned int buffersize = sizeof(buffer);
if (ospGetOspHeader(msg, buffer, &buffersize) != 0) {
return MODULE_RETURNCODE_FALSE;
} else {
return MODULE_RETURNCODE_TRUE;
}
}
/*
* Validate OSP token
* param ignore1
* param ignore2
* return MODULE_RETURNCODE_TRUE success, MODULE_RETURNCODE_FALSE failure MODULE_RETURNCODE_ERROR error
*/
int ospValidateHeader (
struct sip_msg* msg,
char* ignore1,
char* ignore2)
{
int errorcode;
OSPTTRANHANDLE transaction = -1;
unsigned int authorized = 0;
unsigned int timelimit = 0;
void* detaillog = NULL;
unsigned int logsize = 0;
unsigned char* callidval = (unsigned char*)"";
OSPTCALLID* callid = NULL;
unsigned callidsize = 0;
unsigned char token[OSP_TOKENBUF_SIZE];
unsigned int tokensize = sizeof(token);
osp_dest dest;
int result = MODULE_RETURNCODE_FALSE;
ospInitDestination(&dest);
if ((errorcode = OSPPTransactionNew(_osp_provider, &transaction) != OSPC_ERR_NO_ERROR)) {
LM_ERR("failed to create a new OSP transaction handle (%d)\n", errorcode);
} else if ((ospGetRpidUserpart(msg, dest.calling, sizeof(dest.calling)) != 0) &&
(ospGetFromUserpart(msg, dest.calling, sizeof(dest.calling)) != 0))
{
LM_ERR("failed to extract calling number\n");
} else if ((ospGetUriUserpart(msg, dest.called, sizeof(dest.called)) != 0) &&
(ospGetToUserpart(msg, dest.called, sizeof(dest.called)) != 0))
{
LM_ERR("failed to extract called number\n");
} else if (ospGetCallId(msg, &callid) != 0) {
LM_ERR("failed to extract call id\n");
} else if (ospGetSourceAddress(msg, dest.source, sizeof(dest.source)) != 0) {
LM_ERR("failed to extract source address\n");
} else if (ospGetOspHeader(msg, token, &tokensize) != 0) {
LM_ERR("failed to extract OSP authorization token\n");
} else {
LM_INFO( "validate token for: "
"transaction_handle '%d' "
"e164_source '%s' "
"e164_dest '%s' "
"validate_call_id '%s' "
"call_id '%.*s'\n",
transaction,
dest.calling,
dest.called,
_osp_validate_callid == 0 ? "No" : "Yes",
callid->ospmCallIdLen,
callid->ospmCallIdVal);
if (_osp_validate_callid != 0) {
callidsize = callid->ospmCallIdLen;
callidval = callid->ospmCallIdVal;
}
errorcode = OSPPTransactionValidateAuthorisation(
transaction,
"",
"",
"",
"",
dest.calling,
OSPC_E164,
dest.called,
OSPC_E164,
callidsize,
callidval,
tokensize,
token,
&authorized,
&timelimit,
&logsize,
detaillog,
_osp_token_format);
if ((errorcode == OSPC_ERR_NO_ERROR) && (authorized == 1)) {
if (callid->ospmCallIdLen > sizeof(dest.callid) - 1) {
dest.callidsize = sizeof(dest.callid) - 1;
} else {
dest.callidsize = callid->ospmCallIdLen;
}
memcpy(dest.callid, callid->ospmCallIdVal, dest.callidsize);
dest.callid[dest.callidsize] = 0;
dest.transid = ospGetTransactionId(transaction);
dest.type = OSPC_DESTINATION;
dest.authtime = time(NULL);
strncpy(dest.host, _osp_device_ip, sizeof(dest.host) - 1);
strncpy(dest.origcalled, dest.called, sizeof(dest.origcalled) - 1);
if (ospSaveTermDestination(&dest) == -1) {
LM_ERR("failed to save terminate destination\n");
ospRecordEvent(0, 500);
result = MODULE_RETURNCODE_ERROR;
} else {
LM_DBG("call is authorized for %d seconds, call_id '%.*s' transaction_id '%llu'",
timelimit,
dest.callidsize,
dest.callid,
dest.transid);
ospRecordTermTransaction(msg, dest.transid, dest.source, dest.calling, dest.called, dest.authtime);
result = MODULE_RETURNCODE_TRUE;
}
} else {
LM_ERR("token is invalid (%d)\n", errorcode);
/*
* Update terminating status code to 401 and report terminating setup usage.
* We may need to make 401 configurable, just in case a user decides to reply with
* a different code. Other options - trigger call setup usage reporting from the cpl
* (after replying with an error code), or maybe use a different tm callback.
*/
ospRecordEvent(0, 401);
result = MODULE_RETURNCODE_FALSE;
}
}
if (transaction != -1) {
OSPPTransactionDelete(transaction);
}
if (callid != NULL) {
OSPPCallIdDelete(&callid);
}
return result;
}
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