Remove Connection Information in SDP Media

Dear All,

 

I am new to HMR, i would like to remove duplicate Connection Information in SDP message body as shown below. 

 

Via: SIP/2.0/UDP 10.10.10.123:5060;branch=z9hG4bK1173410F4
Remote-Party-ID: <sip:+4412345678@10.10.10.123>;party=calling;screen=yes;privacy=off
From: <sip:+4412345678@10.10.10.123>;tag=41529D08-237B

..... 

v=0
o=CiscoSystemsSIP-GW-UserAgent 1287 8376 IN IP4 10.10.10.123
s=SIP Call
c=IN IP4 10.10.10.123
t=0 0
m=audio 19942 RTP/AVP 0
c=IN IP4 10.10.10.123 <---- Remove this
a=rtpmap:0 PCMU/8000
a=ptime:20

 

I wrote the HMR, however not success. Any suggestion?

 

header-rule
      name ChkFromCiscoRouter
      header-name From
      action store
      comparison-type case-sensitive 
      msg-type request
      methods
      match-value
      new-value
      element-rule
                name ChkIP
                parameter-name
                type uri-host