[SR-Users] Dispatcher question

[Alex Balashov]

What you are asking for is not possible within the semantics of SIP, and 
also not technically viable, because the UAC that sent the initial 
INVITE request is going to receive replies from a place other than the 
one to which it send the request.  If that UA is properly implemented, 
it will not process such replies.

If the initial INVITE transaction is initiated through the proxy, it 
must complete through the proxy.  Those are just the rules of the protocol.

If you don't want sequential (in-dialog) requests, such as BYEs, 
reinvites, UPDATEs, etc. to go between the UAs directly and not through 
the proxy, you can do that: just don't add a Record-Route header (take 
out the record_route() call, if you have it).

However, as to the initial transaction, it must complete through the proxy.

-- Alex

On 11/09/2012 11:28 AM, Mino Haluz wrote:

> Hi,
>
> I have simple dispatcher that is dispatching initial invites to the core
> router. The question is, how can I tell kamailio to not add the Via
> header in the INVITE. I mean, I want that this dispatcher will be
> completely transparent to the core router, so any responses will go
> directly to the original sender, not to the dispatcher. This is my
> request route:
>
> request_route {
>
> if (is_method("INVITE")) {
> if (!ds_select_domain(1, 0)) {
> xlog("L_INFO", "[MAIN] ERROR: Proxy1 failed");
> if (!ds_select_domain(2, 0)) {
> xlog("L_INFO", "[MAIN] FATAL: Proxy2 failed");
> exit;
> }
> }
> xlog("L_INFO","[MAIN] Dispatching INVITE to $rd");
> forward();
> }
> }
>
> 1 and 2 are defined in dispatcher.list. If it can be done in kamailio,
> please how. Thank you!
>
> Mino
>
>
>
>
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-- 
Alex Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
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Tel: +1-678-954-0670
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Web: http://www.evaristesys.com/, http://www.alexbalashov.com/