[SR-Users] Websockets, set_contact_alias(), & IPv6

Anthony Messina amessina at messinet.com
Mon Mar 30 00:23:26 CEST 2015


I've been working on Kamailio websocket integration and I believe I'm having 
issues with the IPv6 address representation in the Contact header's alias 
parameter.  After Googling, it appears after 
https://github.com/kamailio/kamailio/commit/814c08f3 the IPv6 contact is 
represented in brackets [].  However, it when using websockets, and the alias= 
parameter uses brackets [] around and IPv6 address, there are message parsing 
issues.

With a header such as the following
Contact: 
<sip:wstest1 at example.com;gr=urn:uuid:26140e27-0ab7-4e65-98e3-3d0909b1434e;alias=[2001:db8:0:1]~48768~6>

Asterisk 13.2.0 will give the following error:
pjsip:0 <?>:     sip_transport. Error processing 1855 bytes packet from UDP 
10.77.79.3:5060 : PJSIP syntax error exception when parsing 'Request Line' 
header on line 12 col 129:

And when sipjs, or jssip are used with either Firefox or Chrome, they send 
garbage in the ACK request URI:

Kamailio logs something like the following and the ACK cannot be processed:
WARNING: sanity [sanity.c:236]: check_ruri_scheme(): failed to parse request 
uri [�a�{1me▒s�na at 50�9���1.�8:�2v0;i��a��=11>7�n7x>10O�2v0~1]

Is it proper to have [] brackets around the IPv6 alias address in the Contact 
header?  Does the value need to be quoted?

If I force the browser to use IPv4, without changing anything else, both jssip 
and sipjs work perfectly in Firefox and Chrome.

-- 
Anthony - https://messinet.com/ - https://messinet.com/~amessina/gallery
8F89 5E72 8DF0 BCF0 10BE 9967 92DC 35DC B001 4A4E
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