[SR-Users] append_hf to CANCEL

Grant Bagdasarian GB at cm.nl
Wed Nov 20 15:19:34 CET 2013

I see, so there is no way to append a header to the CANCEL created by Kamailio?

I tried the onsend_route and branch_route, but none of them worked.

-----Original Message-----
From: sr-users-bounces at lists.sip-router.org [mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of Alex Balashov
Sent: Wednesday, November 20, 2013 3:09 PM
To: sr-users at lists.sip-router.org
Subject: Re: [SR-Users] append_hf to CANCEL

On 11/20/2013 09:05 AM, Grant Bagdasarian wrote:

> Does append_hf not work for CANCEL requests?

Correct:  CANCEL is a "hop-by-hop" request where the proxy is a distinct hop, i.e. UAC sends a CANCEL to the proxy, and the proxy sends a separate CANCEL of its own on the branch that it initiated.  This is in contrast to something like a BYE, and most requests, which are end-to-end request that the proxy simply relays upstream as received.

-- Alex

Alex Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
Suite 106
Decatur, GA 30030
United States
Tel: +1-678-954-0670
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/

SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users at lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

More information about the sr-users mailing list