[Kamailio-Users] BYE message not relayed to caller

[Vikram Ragukumar]

Hello,

I also want to add that, this behavior is not seen while using Asterisk
instead of VOIPSwitch. While using Asterisk, the BYE message has a request
URI corresponding to the cellphone, so the proxy forwards the BYE message
to the cellphone which causes the cellphone to hang up.

Thanks in advance for your help,
Vikram.


> Hello,
>
> My setup includes a cellphone that uses Wi-Fi to hookup to the internet
> with IP 192.168.1.101. Cellphone app, tries to register with VOIPSwitch
> through an outbound proxy server(Kamailio + rtpproxy), which rewrites SDP
> to force rtp through an rtpproxy.
>
> I can make a call from the cellphone to a PSTN number. When the PSTN
> endpoint hangs up, VOIPSwitch relays a BYE message to the proxy that looks
> like :
>
> No.     Time        Source                Destination           Protocol
> Info
>      27 18.383929   IPaddr_VoipSwitch     IPaddr_proxy           SIP
> Request: BYE sip:1234 at IPaddr_VoipSwitch
>
> Frame 27 (420 bytes on wire, 420 bytes captured)
> Ethernet II, Src: Unispher_40:b5:39 (00:90:1a:40:b5:39), Dst:
> Supermic_bd:b9:bc (00:30:48:bd:b9:bc)
> Internet Protocol, Src: IPaddr_VoipSwitch , Dst: IPaddr_proxy
> User Datagram Protocol, Src Port: sip (5060), Dst Port: 7160 (7160)
> Session Initiation Protocol
>     Request-Line: BYE sip:1234 at IPaddr_VoipSwitch SIP/2.0
>         Method: BYE
>         [Resent Packet: False]
>     Message Header
>         Route: <sip:IPaddr_proxy:7160;lr=on;nat=yes>
>         CSeq: 1 BYE
>         Via: SIP/2.0/UDP IPaddr_VoipSwitch:5060;
> branch=z9hG4bk180242100434182912333954
>         From: sip:5678 at IPaddr_VoipSwitch;tag=18024210041929123187506289
>         Call-ID: LUOyIDm-ecy36NcUfj5G3v1lM6g5snkM
>         To: "1234"
> <sip:1234 at IPaddr_VoipSwitch>;tag=9XHJmiuf58vTrF7.vwflEK-G63JVPQSi
>         Content-Length: 0
>
> The request URI in the above message is the IP address of VOIPSwitch
> itself, which causes the proxy to forward the BYE message back to
> VOIPSwitch. The cellphone never receives the BYE message and consequently
> never hangs up.
>
> Any suggestions on how i can get around this problem ?
>
> Thanks and Regards,
> Vikram.
>
>
>
>
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-- 
Thanks and Regards,
Vikram Ragukumar.