FS No ACK for 200 OK from GW

5 Nov 2015

      Hello all,

I am having a situation where 200 OK from a GW arrives at FS and can be
seen in FS CLI but no ACK is generated. Here in INVITE and 200 OK packets
 I am wondering what are the problematic headers I know contact is messy
though. Shouldn't it at least generate an ACK ?.

PUBLIC-IP:5070 =  FS
PUBLIC-IP or PUBLIC-IP:5060 = GW(Kamailio)

-------------------------- INVITE -------From FS to GW--------------------
   INVITE sip:81205999@public.domain.com SIP/2.0
   Via: SIP/2.0/UDP PUBLIC-IP:5070;rport;branch=z9hG4bK4rSU85e8rjj6j
   Max-Forwards: 70
   From: "UserA" <sip:16910067@PUBLIC-IP>;tag=BSNjv3XNrFU1m
   To: <sip:81205999@public.domain.com>
   Call-ID: 8fe2118a-fe89-1233-2781-069be24d4191
   CSeq: 83037069 INVITE
   Contact: <sip:gw+pcall@PUBLIC-IP:5070;transport=udp;gw=pvcall>
   User-Agent:
FreeSWITCH-mod_sofia/1.4.23+git~20151023T152155Z~9fcf3e0c9a~64bit
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE,
REGISTER, REFER, NOTIFY
   Supported: timer, path, replaces
   Allow-Events: talk, hold, conference, refer
   Content-Type: application/sdp
   Content-Disposition: session
   Content-Length: 303
   X-FS-Support: update_display,send_info
   Remote-Party-ID: "UserA" <sip:16910067@PUBLIC-IP
...
;party=calling;screen=yes;privacy=off
v=0
   o=FreeSWITCH 1446729346 1446729347 IN IP4 PUBLIC-IP
   s=FreeSWITCH
   c=IN IP4 PUBLIC-IP
   t=0 0
   m=audio 16920 RTP/AVP 102 0 8 9 101 13
   a=rtpmap:102 SPEEX/16000
   a=rtpmap:0 PCMU/8000
   a=rtpmap:8 PCMA/8000
   a=rtpmap:9 G722/8000
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-16
   a=ptime:20

 ---------------------------------- 200 OK -------From GW to
FS----------------------------
    SIP/2.0 200 OK
   Via: SIP/2.0/UDP
PUBLIC-IP:5070;received=PUBLIC-IP;rport=5070;branch=z9hG4bK4rSU85e8rjj6j
   To: <sip:81205999@public.domain.com>;tag=shv30apv2f
   From: "UserA" <sip:16910067@PUBLIC-IP>;tag=BSNjv3XNrFU1m
   Call-ID: 8fe2118a-fe89-1233-2781-069be24d4191
   CSeq: 83037069 INVITE
   Contact: <sip:k471p745@v3n0qcki9ah1.invalid
;alias=182.178.237.31~20760~6;transport=ws>
   X-Can-Renegotiate: true
   Supported: ice,replaces,outbound
   Content-Type: application/sdp
   Content-Length: 597

   v=0
   o=- 464531514895581299 2 IN IP4 PUBLIC-IP
   s=-
   t=0 0
   a=msid-semantic: WMS QT4IzXsqqeNv2uaXsBBrmLBlUeHKFOYKSRMh
   m=audio 33416 RTP/AVP 0 8 9 101 13
   c=IN IP4 PUBLIC-IP
   a=rtpmap:0 PCMU/8000
   a=rtpmap:8 PCMA/8000
   a=rtpmap:9 G722/8000
   a=rtpmap:101 telephone-event/8000
   a=rtpmap:13 CN/8000
   a=ssrc:4081787962 cname:HWxDJwiTLUiGrbg/
   a=ssrc:4081787962 msid:QT4IzXsqqeNv2uaXsBBrmLBlUeHKFOYKSRMh
3f289eda-ce8d-4219-ac04-1147e6a14fdb
   a=ssrc:4081787962 mslabel:QT4IzXsqqeNv2uaXsBBrmLBlUeHKFOYKSRMh
   a=ssrc:4081787962 label:3f289eda-ce8d-4219-ac04-1147e6a14fdb
   a=sendrecv
   a=rtcp:33417

-- 
Regards
Salman

Salman

Anthony Minessale

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