[SIP Beyond VoIP] Sylk does not use maddr in the 200 OK that is reply to NOTIFY request

Record Route recordroute at gmail.com
Wed Jan 30 23:40:40 CET 2013


Hi guys,

My Sip Proxy keeps client's IP in the Contact header of 200 OK to reply to
NOTIFY request and adds its IP to maddr parameter of that Contact header as
below,

This is the 200 OK for NOTIFY that passes through my sip proxy and received
by Sylk;

  SIP/2.0 200 OK
  From: <sip:user1 at domain.com>;tag=eu0RxmMX51szGFc-WHymQXvDIWInm3td
  To: <sip:chatroom at domain.com>;tag=mNCCjL9ioOCeLch.7Pk8DrgOJWDR1WXw
  CSeq: 29089 NOTIFY
  Call-ID: 1xx--hIpSCLHgBKt1i02glKkuSyc131-
  Via: SIP/2.0/UDP 192.168.89.82:5060
;rport=5060;branch=z9hG4bKPj-GLa7rG8QLjbOVgSmVJsdok5tLDfgOfi
  Content-Length: 0
  Contact: <sip:hdnfgkpo at 192.168.89.76:5060;maddr=192.168.58.115>
  Supported: 100rel,replaces,norefersub,gruu
  Allow: SUBSCRIBE, NOTIFY, PRACK, INVITE, ACK, BYE, CANCEL, UPDATE,
MESSAGE, REFER
  server:  sipsimple 0.31.0

Sylk seems to be not using the maddr ip in the Contact header of 200OK,
Then this results in, further NOTIFY messages are sent by Sylk to clients
directly, not to my sip proxy.



I guess, a fix needs to be applied, what should I do?

Thanks...
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