[Freeswitch-users] Wrong transport=tcp in SIP Contact field.

[Anthony Minessale]

You could use iptables or a sip proxy to rewrite it.


On Wed, Aug 22, 2012 at 8:37 AM, Vladimir Ananiev <ananiev at svyaz.com> wrote:
> Hello all.
>
> I have a problem with some specific softphone connecting to the Freswitch system.
> This softphone connects with UDP protocol, but sends additional ;transport=tcp line in the end of Contact field, that makes freeswitch thinking that the transport is really TCP, not the UDP. And after that incoming calls are not working. Outgoing calls from that softphone are working just fine.
>
> Is there a way to force freeswitch to use UDP in this case ? I already have <param name="bind-params" value="transport=udp" /> in sip profile settings...
>
> See the packet dump from wireshark:
> User Datagram Protocol, Src Port: na-localise (5062), Dst Port: sip (5060)
>     Source port: na-localise (5062)
>     Destination port: sip (5060)
>     Length: 793
>     Checksum: 0x34ff [validation disabled]
> Session Initiation Protocol
>     Request-Line: REGISTER sip:sip.test.com SIP/2.0
>         Method: REGISTER
>         Request-URI: sip:sip.test.com
>         [Resent Packet: False]
>     Message Header
>         CSeq: 535 REGISTER
>         Via: SIP/2.0/UDP 192.168.0.12:5062;branch=z9hG4bK2edb4d2b-d007-1910-9210-1cc1de60bc3c;rport
>         User-Agent: TMSoftPhone
>         [truncated] Authorization: Digest username="621", realm="sip.test.com", nonce="c4f876ae-eb58-11e1-8919-6df0d0a4f1d4", uri="sip:sip.test.com", algorithm=MD5, response="52625726279aaf004b61871164b61088", cnonce="0560cd01-d007-1910-91f
>         From: <sip:621 at sip.test.com>;tag=25ffcc01-d007-1910-91fb-1cc1de60bc3c
>         Call-ID: 25ffcc01-d007-1910-91fa-1cc1de60bc3c
>         To: <sip:621 at sip.test.com>
>         Contact: <sip:621 at 192.168.0.12:5062;transport=tcp>
>         Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,SUBSCRIBE,NOTIFY,REFER,MESSAGE,INFO,PING
>         Expires: 120
>         Content-Length: 0
>         Max-Forwards: 70
>
> ---
> Ананьев Владимир Викторович
> Технический Директор
> ЗАО "СВЯЗЬ"
> Тел.   +7 495 7238000, доб. 101
> Факс.+7 495 7308111
> E-mail: ananiev at svyaz.com
>
>
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-- 
Anthony Minessale II

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