[Devel] NAT, RTP PROXY problem,

[ravi.sunkara at hyperion-tech.com]

Hi Users

Hi Users,

I install the openser 1.0.1  and rtp proxy 0.3 in same  Linux System.
Openser server is located with public id xx.xxx.xxx.xx of   192.168.2.2 ,
And  UAC are outside the NAT,
1)         When  one UAC call to other UAC( are both in  outside the NAT where openser server), after the INVITE method get request by server,  after 32 second its hung up automatically, Voice is ok , and callee is hung upping, not caller,
2)        UAC ( inside the nAT , openser server ) calls to UAC (outside the NAT ) in not hung uping and voice is not ok....
3)         UAC calls to UAC (both are in inside the NAT, where OpenSER is located in same network ).
Where is the problem, in NAt with rtp or networking,

Here by My openser.cfg with routing logic...
route{
    if (!mf_process_maxfwd_header("10")) {
        sl_send_reply("483","Too Many Hops");
        exit;
    };
    if (msg:len >=  2048 ) {
        sl_send_reply("513", "Message too big");
        exit;
    };

    # NAT detection
    route(2);

    if (!method=="REGISTER")
        record_route();

    if (loose_route()) {
        append_hf("P-hint: rr-enforced\r\n");
        route(1);
    };

    if (!uri==myself) {
        append_hf("P-hint: outbound\r\n");
        route(1);
    };

    if (uri==myself) {
        if (method=="REGISTER") {
            if (!www_authorize("xx.xxx.xxx.xxx", "subscriber")) {
                www_challenge("xx.xxx.xxx.xxx", "0");
                exit;
            };

            if (isflagset(5)) {
                setflag(6);
                # if you want OPTIONS natpings uncomment next
                # setflag(7);
            };
            save("location");
            exit;
        };

        if (!lookup("location")) {
            sl_send_reply("404", "Not Found");
            exit;
        };
        append_hf("P-hint: usrloc applied\r\n");
    };

    route(1);
}


route[1] {
    if (subst_uri('/(sip:.*);nat=yes/\1/')){
        setflag(6);
    };

    if (isflagset(5)||isflagset(6)) {
        route(3);
    }

    if (!t_relay()) {
        sl_reply_error();
    };
    exit;
}

route[2]{
    force_rport();
    if (nat_uac_test("19")) {
        if (method=="REGISTER") {
            fix_nated_register();
        } else {
            fix_nated_contact();
        };
        setflag(5);
    };
}

route[3] {
    if (is_method("BYE|CANCEL")) {
        unforce_rtp_proxy();
    } else if (is_method("INVITE")){
        force_rtp_proxy();
        t_on_failure("1");
    };
    if (isflagset(5))
        search_append('Contact:.*sip:[^>[:cntrl:]]*', ';nat=yes');
    t_on_reply("1");
}

failure_route[1] {
    if (isflagset(6) || isflagset(5)) {
        unforce_rtp_proxy();
    }
}

onreply_route[1] {
    if ((isflagset(5) || isflagset(6)) && status=~"(183)|(2[0-9][0-9])") {
        force_rtp_proxy();
    }
    search_append('Contact:.*sip:[^>[:cntrl:]]*', ';nat=yes');

    if (isflagset(6)) {
        fix_nated_contact();
    }
    exit;
}



Thanks & Regards

Sunkara Ravi Prakash,
Hyperion Technologies,
www.hyperion-tech.com.