[Serusers] forward_msg: no 2nd via found in reply
Jan Janak
jan at iptel.org
Wed Jul 14 09:54:59 CEST 2004
The error means that ser did receive a reply but does not know where to
forward it because it is missing a Via header field. I do not fully
understand the configuration file below (especially forwarding to
127.0.0.1), but SIP message dump would certainly help.
Jan.
On 13-07 16:52, Cyprien Simons wrote:
>
> Hi everybody,
>
> I'm trying to use Asterisk as SUA and SER as SIP router. But Asterisk doesn't
> succeed to register the Asterisk user to SER... the standard error output
> tell me:
> "ERROR: forward_msg: no 2nd via found in reply"
>
> the SIP message looks like:
>
> to 193.175.133.19:5060
> Retransmitting #5 (no NAT):
> REGISTER sip:potemkin.fokus.fraunhofer.de SIP/2.0
> Via: SIP/2.0/UDP 193.175.133.19:5060;branch=z9hG4bK625558ec
> From: <sip:cys at potemkin.fokus.fraunhofer.de>;tag=as238e1f29
> To: <sip:cys at potemkin.fokus.fraunhofer.de>
> Call-ID: 6b8b4567327b23c6643c986966334873 at 193.175.133.19
> CSeq: 102 REGISTER
> User-Agent: Asterisk PBX
> Expires: 120
> Contact: <sip:1234 at 193.175.133.19>
> Event: registration
> Content-Length: 0
>
> and the configuration file is like:
>
> ###main routing logic
> route{
> # initial sanity checks -- messages with
> # max_forwards==0, or excessively long requests
> if (!mf_process_maxfwd_header("10")) {
> sl_send_reply("483","Too Many Hops");
> break;
> };
> if ( msg:len > max_len ) {
> sl_send_reply("513", "Message too big");
> break;
> };
>
> record_route();
>
> # Do strict routing if pre-loaded route headers present
> loose_route();
>
> # message should be from 127.0.0.1 or
> # from other listening address
>
> if (src_ip==127.0.0.1) {
> if (method=="REGISTER") {
> save("location");
> break;
> };
> if (uri == myself) {
> # native SIP destinations are handled using our USRLOC
> DB
> if (!lookup("location")) {
> sl_send_reply("404", "Not Found");
> break;
> };
> };
> # forward to current uri now
> if (!t_relay()) {
> sl_reply_error();
> };
> } else if (src_ip == myself) {
> # this is a request from local domain
> # but not from 127.0.0.1, must be from UA
> if (method=="REGISTER") {
> # register message, save it and forward to
> # security server
> save("location");
> forward (127.0.0.1, 4050);
> break;
> };
> forward (127.0.0.1, 4050);
> break;
> };
> }
>
>
> I'm using ser 0.8.12, SuSE 9.1, Asterisk 0.9.1
>
> I am quite new on SER, and I am trying to pursue the work of another person,
> so if something in it seems stupid, don't hesitate to tell me so...
>
> Cyprien
>
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> serusers at lists.iptel.org
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