Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2009-01-07 Thread Scott Lawrence
On Wed, 2009-01-07 at 11:02 -0500, Paul Kyzivat wrote: > What Scott says seems reasonable. In his case, if the feature is turned > off it really is a proxy. If the option is turned on, and SDP is > updated, then the best you can say is that it is a proxy with > non-compliant behavior. ... and

Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2009-01-07 Thread Michael Procter
Victor Pascual Ávila wrote: > When a caller is behind a NAT, rewriting SDP in INVITE to include an > RTP relay's address in it is a pretty common practice. > Leaving RFC3261 fundamentalism aside-- do we consider it then still > legitimate enough to call it a "SIP proxy"? > You are using deliber

Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2009-01-07 Thread Paul Kyzivat
What Scott says seems reasonable. In his case, if the feature is turned off it really is a proxy. If the option is turned on, and SDP is updated, then the best you can say is that it is a proxy with non-compliant behavior. Thanks, Paul Scott Lawrence wrote: > On Wed, 2009-01-07

Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2009-01-07 Thread Scott Lawrence
On Wed, 2009-01-07 at 16:17 +0100, Victor Pascual Ávila wrote: > > If it breaks these rules, it is no longer acting as a proxy. > > When a caller is behind a NAT, rewriting SDP in INVITE to include an > RTP relay's address in it is a pretty common practice. > Leaving RFC3261 fundamentalism aside

Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2009-01-07 Thread Victor Pascual Ávila
On Wed, Jan 7, 2009 at 3:22 PM, Michael Procter wrote: > Guilherme Balena Versiani wrote: >> Hello Paul, >> >> Paul Kyzivat wrote: >> >>> erol turac wrote: >>> >>> how can proxies edit c line in sdp? which rules can be applied to c line by proxies? I have a sip client behind na

Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2009-01-07 Thread Michael Procter
Guilherme Balena Versiani wrote: > Hello Paul, > > Paul Kyzivat wrote: > >> erol turac wrote: >> >> >>> how can proxies edit c line in sdp? which rules can be applied to c line by >>> proxies? >>> >>> I have a sip client behind nat which insert its own private IP at session >>> level (c

Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2009-01-07 Thread Guilherme Balena Versiani
Hello Paul, Paul Kyzivat wrote: > erol turac wrote: > >> how can proxies edit c line in sdp? which rules can be applied to c line by >> proxies? >> >> I have a sip client behind nat which insert its own private IP at session >> level (c line under m line) >> and NAT adds its own public IP into

Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2009-01-07 Thread Paul Kyzivat
erol turac wrote: > how can proxies edit c line in sdp? which rules can be applied to c line by > proxies? > > I have a sip client behind nat which insert its own private IP at session > level (c line under m line) > and NAT adds its own public IP into c line at media level before forwarding > 2

Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2009-01-06 Thread erol turac
how can proxies edit c line in sdp? which rules can be applied to c line by proxies? I have a sip client behind nat which insert its own private IP at session level (c line under m line) and NAT adds its own public IP into c line at media level before forwarding 200 OK to proxy. Here, proxy remove

Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2008-12-31 Thread Dale Worley
On Tue, 2008-12-30 at 22:37 +0800, Serbang, Nabam (Nabam) wrote: > So how u1 knows where to send RTP packet. Usually it will send to > address present in Contact header. U1 will *never* use the IP address in the Contact header to determine where to send RTP packets, it will use the address in the

Re: [Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2008-12-30 Thread Arunachala
Interactive Connectivity Establishment (ICE) could be of some interest to you. http://tools.ietf.org/html/draft-ietf-mmusic-ice-19 -Arun On Tue, Dec 30, 2008 at 6:37 AM, Serbang, Nabam (Nabam) wrote: > > Hi all, > > Say I have two proxies p1 and p2. > > U1 is a UA resistered on p1 and U2 is an

[Sip-implementors] How to determine where to send RTP packet in multi-proxy SIP network

2008-12-30 Thread Serbang, Nabam (Nabam)
Hi all, Say I have two proxies p1 and p2. U1 is a UA resistered on p1 and U2 is an another UA registered on p2. Due to certain scenario, is it ever likely that U1 and U2's ip address will ever be same ? Because P1 and P2 will be resolving the IP address for u1 and u2, Even if both u1 and u2 i