[Freeswitch-users] Hostname vs IP in SDP

[Colin Morelli]

Steven,

Thanks for the clarification - that's really helpful (it also means I can
go file browser bugs which I'll do)

Agreed it'll cause interop issues (for example the ones seen in WebRTC).
It's too bad, because it could be helpful in a few different scenarios.

That said, for now I'm just looking to slowly start using it on devices
that will have problems with IP addresses. Does anyone know if there's a
way, via a channel var, to set the advertised address in the SDP?

Best,
Colin

On Thu, Aug 4, 2016 at 7:03 AM Steven Ayre <steveayre at gmail.com> wrote:

> RFC4566 5. SDP Specification
> "A session description can contain domain names in the "o=", "u=", "e=",
> "c=", and "a=" lines."
>
> It's a detail I'd expect some implementations may have skipped over though
> so I'd expect it could lead to interop issues. Also you need to assume it
> will resolve to the IP you expect, not necessarily the case if it resolves
> to multiple IPs for example or it has changed and the TTL has not expired
> yet. And it might not play well with SIP ALGs. I'd avoid it. That's not
> evidence based, purely gut instinct.
>
>
>
>
>
> On 3 August 2016 at 06:10, Michael Jerris <mike at jerris.com> wrote:
>
>> I have not once in my life seen someone use a hostname instead of an ip
>> in an sdp, and I do not believe it is legal.
>>
>> > On Aug 2, 2016, at 1:00 PM, Colin Morelli <colin.morelli at gmail.com>
>> wrote:
>> >
>> > Hey all,
>> >
>> > So it looks like WebRTC has issues dealing with hostnames in the SDP
>> instead of IP addresses. Particularly, when including a hostname in the SDP
>> there's no audio in either direction. This is the case in both the latest
>> Firefox + Chrome browsers.
>> >
>> > This is particularly problematic for applications that are WebRTC +
>> mobile, now that Apple is enforcing applications to support IPv6-only
>> networks. Using hostnames in the record-route and SDP addresses meets the
>> requirement since the OS will synthesize an IPv6 address when a DNS query
>> is performed, but according to the documentation they strongly urge
>> applications to avoid using address literals in their applications.
>> >
>> > Has anyone had success with methods to switch between advertising a
>> hostname vs IP address in the SDP? Or other methods for solving this
>> problem?
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://confluence.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20160804/29995543/attachment.html