Block unwanted user agent from SDP field?
Is it possible to use an HMR to block specific user agents in the "S=" field of sdp? See below for example INVITE:
Summary: INVITE SDP From: <sip:556624@xx.xx.xx.xx:5060 To: <sip:01150251756941@xx.xx.xx.xx:5060> sip:01150251756941@xx.xx.xx.xx:5060
INVITE sip:01150251756941@xx.xx.xx.xx:5060 SIP/2.0
Via: SIP/2.0/UDP xx.xx.xx.xx:5060;branch=z9hG4bKdbt58f102od15lokb140.1
From: <sip:556624@xx.xx.xx.xx:5060;transport=UDP>;tag=4adaf50-a77245e-13c4-5c196-c41a76e6-5c196
To: <sip:01150251756941@xx.xx.xx.xx:5060>
Call-ID: 4b2fb30-a77245e-13c4-5c196-a2e7b4fd-5c196@67.141.40.228