[SR-Users] Kamailio does not add port number to addresses in Via, Record-Route headers

[Daniel-Constantin Mierla]

Hello,

I did a quick test and all looks fine, ports are set in via and
record-route, in my config I have:

    record_route();

    $fs="udp:127.0.0.1:5080";
    $du = "sip:127.0.0.1:9";
    t_relay();
    exit;

Then sending an OPTIONS resulted in the trace shown below.

Cheers,
Daniel

U 2017/12/11 17:14:47.108430 127.0.0.1:56729 -> 127.0.0.1:5060
OPTIONS sip:test at 127.0.0.1 SIP/2.0.
Via: SIP/2.0/UDP 192.168.178.84:62516;branch=z9hG4bK.3aaddf68;rport;alias.
From: sip:sipsak at 192.168.178.84:62516;tag=16d1c24.
To: sip:test at 127.0.0.1.
Call-ID: 23927844 at 192.168.178.84.
CSeq: 1 OPTIONS.
Contact: sip:sipsak at 192.168.178.84:62516.
Content-Length: 0.
Max-Forwards: 70.
User-Agent: sipsak 0.9.7pre.
Accept: text/plain.
.


U 2017/12/11 17:14:51.010251 127.0.0.1:5080 -> 127.0.0.1:9
OPTIONS sip:test at 127.0.0.1 SIP/2.0.
Record-Route: <sip:127.0.0.1:5080;r2=on;lr>.
Record-Route: <sip:127.0.0.1;r2=on;lr>.
Via: SIP/2.0/UDP
127.0.0.1:5080;branch=z9hG4bK61bd.b2882fea15c488761489f8ef588efbe1.0.
Via: SIP/2.0/UDP
192.168.178.84:62516;received=127.0.0.1;branch=z9hG4bK.3aaddf68;rport=56729;alias.
From: sip:sipsak at 192.168.178.84:62516;tag=16d1c24.
To: sip:test at 127.0.0.1.
Call-ID: 23927844 at 192.168.178.84.
CSeq: 1 OPTIONS.
Contact: sip:sipsak at 192.168.178.84:62516.
Content-Length: 0.
Max-Forwards: 69.
User-Agent: sipsak 0.9.7pre.
Accept: text/plain.
.


On 11.12.17 16:37, George Diamantopoulos wrote:
> Hello all,
>
> I have the following issue in my configuration, tested with 5.2.0-rc1
> so far:
>
> At some point, I set the $fs pseudovariable to force a request to be
> relayed through a specific socket. Although this is honoured by
> kamailio (i.e. the request does indeed leave the kamailio host from
> the respective socket), the port number is not added to the Via and RR
> headers. As a result, all replies to the request, as well as all
> subsequent requests from the other SIP UA are relayed to the default
> port, 5060. Here's an example:
>
> SIP UAC to kamailio:
> INVITE 192.168.1.1:5060 <http://192.168.1.1:5060> --->
> 192.168.1.254:5060 <http://192.168.1.254:5060>
> Kamailio to UAS ($fs is set):
> INVITE 2.2.2.2:5066 <http://2.2.2.2:5066> ---> 3.3.3.3:5060
> <http://3.3.3.3:5060>
> Topmost Via in request relayed by kamailio is:
> SIP/2.0/UDP 2.2.2.2;branch=aaaaaaaaaaaaaa    <- port 5066 is not added
> Topmost RR in request relayed by kamailio is:
> <sip:2.2.2.2;r2=on;lr;did=bbbbbbb;nat=yes>    <- port 5066 is not added
> RESULT: Reply from UAS is sent to 2.2.2.2:5060 <http://2.2.2.2:5060>
>
> Is this behaviour valid? Am I missing anything? Kamailio is configured
> to listen on both sockets on IP 2.2.2.2, namely: a) udp:2.2.2.2:5060
> <http://2.2.2.2:5060> and b) 2.2.2.2:5066 <http://2.2.2.2:5066>. Thanks.
>
> BR,
> George
>
>
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-- 
Daniel-Constantin Mierla
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