[OpenSIPS-Users] How to intercept CANCEL and change fu&tu

[陈子妍]

Hello, I am green hand here.
In my case, with topology_hiding and fU&tU rewrite, I have to mask initial
fU & tU when proxying sip messages. All succeed, but CANCEL message inited
locally by server, I can not change fu & tu, If I do it manually, tm can
not match. Any suggestions?

thing I have:










*CANCEL sip:a.rewrite at b.domain:5060 SIP/2.0
                                                Via: SIP/2.0/UDP
proxy.domain:5060;branch=z9hG4bK932b.33154787.0
                                                 From:
<sip:a at a.domain>;tag=877556c1e3e94f9da53100d72eefa195
                                                 Call-ID:
TArYzB5EQMMZ3w1Yi5JAwtle2Bne0QGXmovMTc-
                                               To: <sip:b at proxy.domain>

                     CSeq: 26759 CANCEL

            Max-Forwards: 70

    Reason: SIP;cause=487;text="ORIGINATOR_CANCEL"

User-Agent: OpenSIPS (3.5.2 (x86_64/linux))

 Content-Length: 0  *


thing I want:










*CANCEL sip:a.rewrite at b.domain:5060 SIP/2.0
                                                Via: SIP/2.0/UDP
proxy.domain:5060;branch=z9hG4bK932b.33154787.0
                                                 From:
<sip:a.rewrite at a.domain>;tag=877556c1e3e94f9da53100d72eefa195
                                                         Call-ID:
TArYzB5EQMMZ3w1Yi5JAwtle2Bne0QGXmovMTc-
                                               To:
<sip:b.rewrite at proxy.domain>
                                                       CSeq: 26759 CANCEL

                                              Max-Forwards: 70

                                      Reason:
SIP;cause=487;text="ORIGINATOR_CANCEL"
                                                            User-Agent:
OpenSIPS (3.5.2 (x86_64/linux))
                                                       Content-Length: 0  *
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