Hi,
draft-marjou-sipping-b2bua-00
If a SIP INVITE message sent by Alice indicates some supported
extensions (e.g. 100rel), it is important that the B2BUA forward
these extensions in the SIP INVITE message sent to Bob. Otherwise,
the two users will never be able to use these SIP extensions.
I can get from there that Supported must be forwarded, isn't it illegal.
For example UA1 has some xxx feature what B2BUA won't support, now B2BUA
forwards it to UA2, UA2 requires to handle it but B2BUA don't know how.
I think B2BUA must always generate it's own Supported: with value what
it supports or i miss something ?
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