static int
nat_uac_test_f(struct sip_msg* msg, char* str1, char* str2)
{
int tests;
if (get_int_fparam(&tests, msg, (fparam_t*) str1) < 0)
return -1;
/* return true if any of the NAT-UAC tests holds */
/* test if the source port is different from the port in Via */
if ((tests & NAT_UAC_TEST_RPORT) &&
(msg->rcv.src_port != (msg->via1->port ? msg->via1->port : SIP_PORT))) {
return 1;
}
/*
* test if source address of signaling is different from
* address advertised in Via
*/
if ((tests & NAT_UAC_TEST_RCVD) && received_test(msg))
return 1;
/*
* test for occurrences of RFC1918 addresses in Contact
* header field
*/
if ((tests & NAT_UAC_TEST_C_1918) && (contact_1918(msg) > 0))
return 1;
/*
* test for occurrences of RFC1918 addresses in SDP body
*/
if ((tests & NAT_UAC_TEST_S_1918) && sdp_1918(msg))
return 1;
/*
* test for occurrences of RFC1918 addresses top Via
*/
if ((tests & NAT_UAC_TEST_V_1918) && via_1918(msg))
return 1;
/*
* test if source port of signaling is different from
* port advertised in Contact
*/
if ((tests & NAT_UAC_TEST_C_PORT) && (contact_rport(msg) > 0))
return 1;
/* no test succeeded */
return -1;
}
/* tests if address of signaling is different from address in 1st Via field */
static Bool
testSourceAddress(struct sip_msg* msg)
{
Bool diffIP, diffPort;
int via1Port;
diffIP = received_test(msg);
if (isSIPAsymmetric(getUserAgent(msg))) {
// ignore port test for asymmetric clients (it's always different)
diffPort = False;
} else {
via1Port = (msg->via1->port ? msg->via1->port : SIP_PORT);
diffPort = (msg->rcv.src_port != via1Port);
}
return (diffIP || diffPort);
}
/**
* Tests if the message was received from behind a NAT.
* - tests received, contact and via
* @param msg - the SIP message
*/
int nat_uac_test(struct sip_msg * msg) {
if(pcscf_nat_pingall)
return 1;
if((pcscf_nat_detection_type && NAT_UAC_TEST_RPORT) &&
(msg->rcv.src_port != (msg-> via1->port ? msg->via1->port:SIP_PORT)))
return 1;
if((pcscf_nat_detection_type & NAT_UAC_TEST_RCVD) && received_test(msg))
return 1;
// if((pcscf_nat_detection_type & NAT_UAC_TEST_C_1918) && contact_1918(msg))
//return 1;
// if((pcscf_nat_detection_type & NAT_UAC_TEST_S_1918) && sdp_1918(msg))
// return 1;
if((pcscf_nat_detection_type & NAT_UAC_TEST_V_1918) && via_1918(msg))
return 1;
return 0;
}