Roman Shpount <ro...@telurix.com> writes: > We actually always use UDP like re-transmits even when sending SIP messages > over TCP or TLS. There are enough implementations that connect TCP or TLS > interface with UDP using a stateless proxy which make it necessary.
Just last night, I found this requirement, which I had long forgotten: RFC 3261, section 16.1 Requests forwarded between different types of transports where the proxy's TU must take an active role in ensuring reliable delivery on one of the transports MUST be forwarded transaction statefully. That is, a stateless proxy is not allowed to send via UDP a request it received via TCP. Dale _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
