[OpenSIPS-Users] Another possible bug in b2bua

[Jeff Kronlage]

Anca,

 

I'm having the b2b crash at different moments now.  While the system
seems relatively stable if I can get past the initial OK/ACKs, I'm
having what appears to be a problem generated by a to-tag with dashes in
it.  For instance:

 

(IPs/hostnames have been replaced by either (proxy) for our front-end
server or (b2bua) for the back-end b2b or (sip gateway) for our Cisco
gear)

 

15:16:00.217293 IP (tos 0xb8, ttl 64, id 0, offset 0, flags [DF], proto
UDP (17), length 974) (proxy).5060 > (b2bua).5060: SIP, length: 946

        SIP/2.0 200 OK

        Via: SIP/2.0/UDP (b2bua);branch=z9hG4bKc4d.78cf4eb3.0

        From:
<sip:719xxx0449@(proxy)>;tag=9e0f6f7cd33d08ad3fd7dcf243da9165-d4dc

        To: sip:719xxx1095@(proxy):5060;tag=2E32D030-2CB

        Date: Sat, 21 Nov 2009 04:05:21 GMT

        Call-ID: B2B.144.0.1258755349

        Server: Cisco-SIPGateway/IOS-12.x

        CSeq: 2 INVITE

        Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER,
SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER

        Supported: replaces

        Allow-Events: telephone-event

        Contact: <sip:719xxx1095@(pstn gateway):5060>

        Record-Route:
<sip:(proxy);lr=on;ftag=9e0f6f7cd33d08ad3fd7dcf243da9165-d4dc;did=81d.b6
260723>

        Content-Type: application/sdp

        Content-Length: 244

 

        v=0

        o=CiscoSystemsSIP-GW-UserAgent 2487 1889 IN IP4 (pstn gateway)

        s=SIP Call

        c=IN IP4 (pstn gateway)

        t=0 0

        m=audio 18922 RTP/AVP 0 101

        c=IN IP4 (pstn gateway)

        a=rtpmap:0 PCMU/8000

        a=rtpmap:101 telephone-event/8000

        a=fmtp:101 0-15

        a=ptime:20

 

15:16:00.217949 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto
UDP (17), length 1015) (b2bua).5060 > (proxy).5060: SIP, length: 987

        SIP/2.0 200 OK

        Record-Route:
<sip:(proxy);lr=on;ftag=a31385f8c7bc6888o0;did=e25.e1d15c16;NAT=true>

        Via: SIP/2.0/UDP (proxy);branch=z9hG4bKef3.ffc40151.0

        Via: SIP/2.0/UDP
192.168.0.101:5060;rport=52434;received=174.22.143.40;branch=z9hG4bK-c02
4968

        From: "719xxx0449"
<sip:719xxx0449@(proxy)>;tag=a31385f8c7bc6888o0

        To: <sip:xxx1095@(proxy)>;tag=B2B.60.0.1258755349

        Call-ID: 175b26b8-7cb3ec8 at 192.168.0.101

        CSeq: 102 INVITE

        Content-Type: application/sdp

        Supported: replaces

        Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER,
SUBSCRIBE, NOTIFY, INFO, UPDATE, REGISTER

        Contact: <sip:opensips@(b2bua):5060>

        Server: OpenSIPS (1.6.1-notls (i386/linux))

        Content-Length: 244

 

        v=0

        o=CiscoSystemsSIP-GW-UserAgent 2487 1889 IN IP4 (pstn gateway)

        s=SIP Call

        c=IN IP4 (pstn gateway)

        t=0 0

        m=audio 18922 RTP/AVP 0 101

        c=IN IP4 (pstn gateway)

        a=rtpmap:0 PCMU/8000

        a=rtpmap:101 telephone-event/8000

        a=fmtp:101 0-15

        a=ptime:20

 

15:16:00.299687 IP (tos 0xb8, ttl 64, id 0, offset 0, flags [DF], proto
UDP (17), length 798) (proxy).5060 > (b2bua).5060: SIP, length: 770

        ACK sip:opensips@(b2bua):5060 SIP/2.0

        Via: SIP/2.0/UDP (proxy);branch=z9hG4bK-13770017

        Via: SIP/2.0/UDP
192.168.0.101:5060;rport=52434;received=174.22.143.40;branch=z9hG4bK-137
70017

        From: "719xxx0449"
<sip:719xxx0449@(proxy)>;tag=a31385f8c7bc6888o0

        To: <sip:xxxx1095@(proxy)>;tag=B2B.60.0.1258755349

        Call-ID: 175b26b8-7cb3ec8 at 192.168.0.101

        CSeq: 102 ACK

        Max-Forwards: 69

        User-Agent: Linksys/SPA942-5.1.15(a)

        Content-Length: 0

 

** OUTBOUND PACKET GENERATED BY B2B  (note the From: tag, and how it has
a piece of the To: tag stuck in it,repeatedly.) **

15:16:00.299860 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto
UDP (17), length 543) (b2bua).5060 > (proxy).5060: SIP, length: 515

        ACK sip:719xxx1095@(pstn gateway):5060 SIP/2.0

        Via: SIP/2.0/UDP (b2bua);branch=z9hG4bKc4d.88cf4eb3.0

        To: <sip:719xxx1095@(proxy):5060>;tag=2E32D030-2CB

        From: <-2CB

        From: <-2CB

        From: <-2CB

        From>;tag=9e0f6f7cd33d08ad3fd7dcf243da9165-d4dc

        CSeq: 2 ACK

        Call-ID: m:5060>;tag=2E32D030

        Route:
<sip:(proxy);lr=on;ftag=9e0f6f7cd33d08ad3fd7dcf243da9165-d4dc;did=81d.b6
260723>

        Content-Length: 0

        User-Agent: OpenSIPS (1.6.1-notls (i386/linux))

        Contact: <sip:opensips@(b2bua).5060>

 

** The B2BUA Opensips instance crashes here **

 

I honestly don't have a big enough sampling of gear to confirm this.  I
have some softphones, a few handsets, Asterisk, a bunch of Cisco kit and
a Covergence SBC I can talk to.  The softphones and Asterisk work great.
The Cisco kit and Covergence both place dashes in their tags and while
speaking to this gear, the B2B crashes and produces the packet you see
above.

 

Your thoughts?

 

As always, I sure appreciate it.

 

Jeff K

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