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

[Anthony Messina]

On Tuesday, April 07, 2015 09:42:00 AM Daniel-Constantin Mierla wrote:
> On 07/04/15 05:32, Anthony Messina wrote:
> > On Sunday, March 29, 2015 08:57:44 PM Anthony Messina wrote:
> >> On Sunday, March 29, 2015 05:23:26 PM Anthony Messina wrote:
> >>> 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:26140e27-0ab7-4e65-98e3-3d0909b1434
> >>> e;
> >>> al ias=[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.
> >> 
> >> It seems that the topoh module doesn't cope with this well.  Disabling
> >> the
> >> topoh module seems to resolve the issue, unfortunately.
> > 
> > I've added some additional information and an example INVITE here:
> > https://github.com/kamailio/kamailio/issues/120
> 
> Wrote in the issue page as well:
> 
> Parameter values for SIP URI must not be enclosed in quotes (as per sip
> rfc).
> 
> However, given that the IP open appear as value of a uri parameter, I
> would expect '[' and ']' to allowed as chars in uri parameters. The SIP
> grammar has to be checked.
> 
> Cheers,
> Daniel

I don't doubt that you're right, Daniel.  I have asked for some assistance on 
the PJSIP mailing list, as I get the same error from both Asterisk 13 and 
CSipSimple nightly build.  Since Asterisk has moved to PJSIP, this could pose 
a significant interoperability issue.

http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2015-April/018313.html

Thanks again.  -A

-- 
Anthony - https://messinet.com/ - https://messinet.com/~amessina/gallery
8F89 5E72 8DF0 BCF0 10BE 9967 92DC 35DC B001 4A4E
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 181 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20150407/aad2825a/attachment.sig>