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This draft is a work item of the Session Initiation Protocol Working Group of the IETF.
Title : Connection Reuse in the Session Initiation
Protocol (SIP)
Author(s) : R. Mahy, et al.
Filename : draft-ietf-sip-connect-reuse-07.txt
Pages : 20
Date : 2006-10-19
When SIP entities use a connection oriented protocol to send a
request, they typically originate their connections from an ephemeral
port. The SIP protocol includes mechanisms which ensure that
responses to a request, and new requests sent in the original
direction reuse an existing connection. However, new requests sent
in the opposite direction are unlikely to reuse the existing
connection. For TLS transports, this will frequently cause a pair of
SIP entities to use one connection for requests sent in each
direction, resulting in potential scaling and performance problems.
This document proposes that a TLS connection, once opened, can be
used to send requests in either direction. Unfortunately, TCP
connections cannot be shared in the same manner due to the risk of
service hijacking. This document proposes an alternate way to
perform TCP connection reuse.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-sip-connect-reuse-07.txt
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