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75 lines
2.0 KiB
75 lines
2.0 KiB
######## NAT Traversal module - signaling functions ########
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#!ifndef NATHELPER_LOADED
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loadmodule "nathelper.so"
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#!trydef NATHELPER_LOADED
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#!endif
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modparam("nathelper", "received_avp", "$avp(AVP_RECV_PARAM)")
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modparam("nathelper", "sipping_from", "sip:sipcheck@MY_HOSTNAME")
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#!trydef KZ_NAT_DETECT "19"
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####### NAT Traversal Logic ########
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route[NAT_INITIAL_TEST]
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{
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if(nat_uac_test(64)) return();
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if(!is_method("INVITE|REGISTER|SUBSCRIBE")) return();
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if ($Rp == "5080") {
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setflag(FLAG_SKIP_NAT_CORRECTION);
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} else {
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if (is_present_hf("Record-Route")) {
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$var(i) = 0;
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$var(rr_count) = $rr_count;
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while($var(i) < $var(rr_count)) {
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$var(rr_base) = $(hdr(Record-Route)[$var(i)]);
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$var(rr_idx) = 0;
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$var(rr) = $(var(rr_base){s.select,$var(rr_idx),,});
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while($var(rr) != $null && $var(rr) != "") {
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$var(i) = $var(i) + 1;
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if (!is_myself("$(var(rr){nameaddr.uri})")) {
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setflag(FLAG_SKIP_NAT_CORRECTION);
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xlog("L_DEBUG", "$ci|log|skipping nat correction on record-route $(var(rr){nameaddr.uri})\n");
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}
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$var(rr_idx) = $var(rr_idx) + 1;
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$var(rr) = $(var(rr_base){s.select,$var(rr_idx),,});
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}
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}
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}
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}
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if (isflagset(FLAG_SKIP_NAT_CORRECTION)) {
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return();
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}
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if(nat_uac_test(KZ_NAT_DETECT)) {
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force_rport();
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setflag(FLAG_NAT);
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if (!is_method("REGISTER")) {
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if(is_first_hop()) set_contact_alias();
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}
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}
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if (has_body("application/sdp") && nat_uac_test("8")) {
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fix_nated_sdp("10");
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}
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}
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route[NAT_REPLY_TEST]
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{
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if(nat_uac_test(64)) return();
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if(nat_uac_test(KZ_NAT_DETECT)) {
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setflag(FLAG_NAT);
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force_rport();
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set_contact_alias();
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}
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if (has_body("application/sdp") && nat_uac_test("8")) {
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fix_nated_sdp("10");
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}
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}
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# vim: tabstop=4 softtabstop=4 shiftwidth=4 expandtab
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