[Spce-user] Missing Max-Forwards Header

[Schaefer, Larry]

Hello... I am just getting started using SEMS with SBC application.  I am seeing an issue where after I hang up a call, the BYE being sent to my SIP application server does not contain a Max-Forwards header.  This causes my SIP stack throw the following error:  "Missing a required header : Max-Forwards".

The BYE message going into the SBC has an Max-Forwards, but when it leaves the SBC, it does not.  The logs below are from the sems.log file that show the messages I am seeing.  The final message is the one that I am having an issue with.

Original Invite to SBC:

Jan  8 19:08:13 sipwise sems[12819]: [#7fe230676700] [run, udp_trsp.cpp:213] DEBUG: vv M [|] u recvd msg via UDP vv#012--++--#012INVITE sip:17193860006 at 10.81.224.232 SIP/2.0#015#012Via: SIP/2.0/UDP 10.2.62.78:44912;branch=z9hG4bK-d8754z-4058c4102839a274-1---d8754z-;rport#015#012Max-Forwards: 70#015#012Contact: <sip:3333 at 10.2.62.78:44912>#015#012To: "100"<sip:17193860006 at 10.81.224.232>#015#012From: "3333"<sip:3333 at 10.2.62.78>;tag=d6147351#015#012Call-ID: MjNhZDViYTRmZTdiNWQwODc1NGU4MGU5YTQwOTllZTE.#015#012CSeq: 1 INVITE#015#012Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO#015#012Content-Type: application/sdp#015#012User-Agent: eyeBeam release 1105z stamp 59031#015#012Content-Length: 180#015#012#015#012v=0#015#012o=- 9 2 IN IP4 10.2.62.78#015#012s=CounterPath eyeBeam 1.5#015#012c=IN IP4 10.2.62.78#015#012t=0 0#015#012m=audio 55426 RTP/AVP 0 101#015#012a=fmtp:101 0-15#015#012a=rtpmap:101 telephone-event/8000#015#012a=sendrecv#015#012--++--

New Invite from SBC to my SIP Server:

Jan  8 19:08:13 sipwise sems[12819]: [#7fe231c8c700] [send, transport.cpp:98] DEBUG: send  msg#012--++--#012INVITE sip:17193860006 at 10.81.224.232 SIP/2.0#015#012Via: SIP/2.0/UDP 10.81.224.232;branch=z9hG4bKCSNunal9;rport#015#012From: "3333" <sip:3333 at 10.2.62.78>;tag=3221B159-52CDA21D000EE81D-31D8D700#015#012To: "100"<sip:17193860006 at 10.81.224.232>#015#012CSeq: 10 INVITE#015#012Call-ID: MjNhZDViYTRmZTdiNWQwODc1NGU4MGU5YTQwOTllZTE._leg2#015#012Contact: <sip:10.81.224.232:5060>#015#012Max-Forwards: 70#015#012Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO#015#012User-Agent: eyeBeam release 1105z stamp 59031#015#012P-Source-IP: 10.2.62.78#015#012P-Source-Port: 44912#015#012Content-Type: application/sdp#015#012Content-Length: 166#015#012#015#012v=0#015#012o=- 9 2 IN IP4 10.2.62.78#015#012s=CounterPath eyeBeam 1.5#015#012c=IN IP4 10.81.224.232#015#012t=0 0#015#012m=audio 40002 RTP/AVP 0 101#015#012a=rtpmap:101 telephone-event/8000#015#012a=sendrecv#015#012--++--

Bye sent to SBC:

Jan  8 19:08:18 sipwise sems[12819]: [#7fe230676700] [run, udp_trsp.cpp:213] DEBUG: vv M [|] u recvd msg via UDP vv#012--++--#012BYE sip:17193860006 at 10.81.224.232:5060 SIP/2.0#015#012Via: SIP/2.0/UDP 10.2.62.78:44912;branch=z9hG4bK-d8754z-7b597f277435f31e-1---d8754z-;rport#015#012Max-Forwards: 70#015#012Contact: <sip:3333 at 10.2.62.78:44912>#015#012To: "100"<sip:17193860006 at 10.81.224.232>;tag=7E3767AC-52CDA21D000EE063-30676700#015#012From: "3333"<sip:3333 at 10.2.62.78>;tag=d6147351#015#012Call-ID: MjNhZDViYTRmZTdiNWQwODc1NGU4MGU5YTQwOTllZTE.#015#012CSeq: 2 BYE#015#012User-Agent: eyeBeam release 1105z stamp 59031#015#012Reason: SIP;description="User Hung Up"#015#012Content-Length: 0#015#012#015#012--++--

Bye sent to my SIP server (no Max-Forwards header):

Jan  8 19:08:18 sipwise sems[12819]: [#7fe231c8c700] [send, transport.cpp:98] DEBUG: send  msg#012--++--#012BYE sip:17193860006 at 10.2.62.78 SIP/2.0#015#012Via: SIP/2.0/UDP 10.81.224.232;branch=z9hG4bKBQ3b.aXk;rport#015#012From: "3333" <sip:3333 at 10.2.62.78>;tag=3221B159-52CDA21D000EE81D-31D8D700#015#012To: "100"<sip:17193860006 at 10.81.224.232>;tag=367319031#015#012CSeq: 11 BYE#015#012Call-ID: MjNhZDViYTRmZTdiNWQwODc1NGU4MGU5YTQwOTllZTE._leg2#015#012Content-Length: 0#015#012#015#012--++--

Is there anything I am doing wrong?  I have been searching, but not found any settings that seem to deal with Max-Forwards.

Thanks,
Larry Schaefer

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