[Serusers] About mangler and xlog

[Jan Janak]

You have to use onreply_route section if you want to change 200 OK. See
sip_router/etc/nathelper.cfg

Regarding xlog, it shows only the original (not rewritten) contact.

Nathelper is considered more stable then mangler because it has been
much more tested.

  Jan.

On 23-01 15:19, giAndrea wrote:
> 
> Folks,
> 
> In my cfg file I've this block. I call this block when I receive a request 
> from a private IP (ex. 192.168.x.x)
> 
> /* route block for mangling */
> route[1] {
> 
>         log(1, "route-block 1 (mangling)\n");
> 
>         # we mangle the contact address and ports in SDP part of the message
>         if (method == "INVITE") {
> 
>                 setflag(1);
> 
>                 log(1, "mangle block: INVITE received and we will mangle 
> ip \n");
> 
>                 sdp_mangle_ip("192.168.0.0/255.0.0.0", "192.168.0.99");
> 
>         };
> 
>         # rewrite Contact: header
>         if (search("Contact: .*@192\.168\.")) {
>                 /* we seem to have a private address on a Contact which is 
> not valid */
>                 encode_contact("enc_prefix","192.168.0.99");
>                 xlog("L_NOTICE", "mangle block: encoded Contact header: 
> <%ct> \n");
>         };
> }
> 
> When I send an INVITE I can see in SDP:
> Content-Type: application/sdp..
> Content-Length: 204..204Contact: Andrea Girardi 
> <sip:enc_prefix*andrea**192.168.0.98*5060*@192.168.0.99>..
> User-Agent: SCS/v3.1.12.33..
> ..
> v=0..
> o=AndreaGirardi13698577 0 IN IP4 192.168.0.98..
> s=ScS Client..
> c=IN IP4 217.57.90.117..
> t=0 0..
> m=audio 1154 RTP/AVP 0 8 4..
> a=rtpmap:0 PCM U/8000..
> a=rtpmap:8 PCMA/8000..
> a=rtpmap:4 G723/8000..
> a=ptime: 30..
> 
> This work correctly when USERA send an Invite to USERB, but when USERB send 
> 200 ok this is the SDP:
> Content-Type: application/sdp..
> Content-Length: 189....
> v=0..
> o=braies 0 0 IN IP4 192.168.0.98..
> s=ScS Client..
> c=IN IP4 192.168.0.98..
> b=CT:1000..
> t=0 0..
> m=audio 57820 RTP/AVP 0 8 4..
> a=rtpmap:0 PCMU/8000..
> a=rtpmap:8 PCMA/8000..
> a=rtpmap:4 G723/8000..
> 
> It's correct or User B has to change c field in SDP? How?
> 
> Can I see a encoded contact 
> (sip:enc_pref*username*ip*port*protocol at public_ip *) with xlog or simply in 
> stderr?
> i've tried to use %ct but it return  <sip:userA at 192.168.0.97:5060>
> 
> is it better to use nathelper or mangler?
> 
> Thanks, Andrea
> 
> 
> -------------------------------------------------------
> Andrea Girardi
> mobile +39 347 9624051
> sip address: giandrea at sip.quellidelpirana.it
> http://www.giandrea.com

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