[sr-dev] git:master: core: don't attempt srv lookup for proto ws or wss

[Klaus Darilion]

Sounds reasonable for Kamailio.

For clients it would be nice to detect the websocket URL automatically 
from DNS. I see that draft-ietf-sipcore-sip-websocket-09 include some 
text for NAPTR and SRV, but I think this is not usefull, as the SRV only 
provides host and port, but the WS URL may be complexer (e.g. contain a 
path)

regards
klaus

On 02.10.2013 13:33, Peter Dunkley wrote:
> WebSocket's is an asynchronous protocol.  The current Kamailio
> implementation is the server-side only.
>
> Because of the asynchronous nature of WebSockets, plus some other
> limitations imposed by the transport, it wouldn't really make sense for
> Kamailio to contain a WebSocket client (in my opinion anyway - it adds
> complexity and "breaks" things without giving any benefit over
> TCP/TLS/SCTP between servers).
>
>
> On 2 October 2013 12:27, Klaus Darilion <klaus.mailinglists at pernau.at
> <mailto:klaus.mailinglists at pernau.at>> wrote:
>
>     E.g. when connection from one Kamailio to another Kamailio via
>     Websockets.
>
>     klaus
>
>
>     On 02.10.2013 13:27, Klaus Darilion wrote:
>
>         Isn't NAPTR/SRV lookups specified for websockets?
>
>         On 01.10.2013 23:18, Daniel-Constantin Mierla wrote:
>
>             Module: sip-router
>             Branch: master
>             Commit: 1c74725dc14fc40d9b553950e21224__1821351878
>             URL:
>             http://git.sip-router.org/cgi-__bin/gitweb.cgi/sip-router/?a=__commit;h=__1c74725dc14fc40d9b553950e21224__1821351878
>             <http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=1c74725dc14fc40d9b553950e212241821351878>
>
>
>             Author: Daniel-Constantin Mierla <miconda at gmail.com
>             <mailto:miconda at gmail.com>>
>             Committer: Daniel-Constantin Mierla <miconda at gmail.com
>             <mailto:miconda at gmail.com>>
>             Date:   Tue Oct  1 23:18:07 2013 +0200
>
>             core: don't attempt srv lookup for proto ws or wss
>
>             ---
>
>                dns_cache.c |    4 ++++
>                1 files changed, 4 insertions(+), 0 deletions(-)
>
>             diff --git a/dns_cache.c b/dns_cache.c
>             index 917b43e..2d7278c 100644
>             --- a/dns_cache.c
>             +++ b/dns_cache.c
>             @@ -2670,6 +2670,10 @@ struct hostent*
>             dns_srv_sip_resolvehost(str*
>             name, unsigned short* port,
>                    }else{
>                        srv_proto=PROTO_UDP;
>                    }
>             +    if(srv_proto==PROTO_WS || srv_proto==PROTO_WS) {
>             +        /* no srv records for web sockets */
>             +        return 0;
>             +    }
>                    /* try SRV if no port specified
>             (draft-ietf-sip-srv-06) */
>                    if ((port)&&(*port==0)){
>
>             *port=(srv_proto==PROTO_TLS)?__SIPS_PORT:SIP_PORT; /* just in
>             case we
>
>
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>
> --
> Peter Dunkley
> Technical Director
> Crocodile RCS Ltd
>
>
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