[SR-Users] bad transport for sips uri?

[Alex Balashov]

Hi,

The sips: scheme is effectively dead, since the RFC requires that a
sips: next-hop guarantee end-to-end security, which it cannot. It has
been effectively replaced by use of ;transport=TLS.

On Fri, Feb 22, 2019 at 02:58:05PM +1300, David Cunningham wrote:

> Hello all,
> 
> We're having an issue with Kamailio not processing an ACK and hope someone
> can help. A PCAP shows that Kamailio is receiving the ACK, and we believe
> these log messages are directly related to it:
> 
> Feb 21 10:54:01 hostname /sbin/kamailio[15854]: ERROR: tm [ut.h:279]:
> uri2dst2(): ERROR: uri2dst: bad transport for sips uri: 1
> Feb 21 10:54:01 hostname /sbin/kamailio[15854]: ERROR: tm [t_fwd.c:1777]:
> t_forward_nonack(): ERROR: t_forward_nonack: failure to add branches
> Feb 21 10:54:01 hostname /sbin/kamailio[15854]: ERROR: sl [sl_funcs.c:387]:
> sl_reply_error(): ERROR: sl_reply_error used: Unresolvable destination
> (478/SL)
> 
> The ACK is as follows. It's from telephone 111111 which is using TLS, which
> Kamailio listens for on port 5061.
> Does anyone know which URI has the bad transport as per the error above?
> Might it be the From URI "sips:111111 at es8.example.com" because it doesn't
> specify port 5061?
> Thank you in advance.
> 
> Session Initiation Protocol (ACK)
>     Request-Line: ACK sips:105 at 70.42.xx.xx:5070 SIP/2.0
>     Message Header
>         Via: SIP/2.0/TLS 50.78.yy.yy:5061;branch=z9hG4bK741961203
>         Route: <sips:70.42.xx.xx:5061;transport=tls;r2=on;lr=on>
>         Route: <sips:70.42.xx.xx;r2=on;lr=on>
>         From: ES8 Test 102 <sips:111111 at es8.example.com
> >;tag=Nf5GG!Orq!MSmGfeu66F03F2114df82b
>         To: <sips:105 at es8.example.com:5061>;tag=as7a72b209
>         Call-ID: 222222 at 50.78.yy.yy
>         CSeq: 94679 ACK
>         Contact: <sips:111111 at 50.78.yy.yy:5061;transport=tls>
>         Max-Forwards: 70
>         User-Agent: ewb2bua/15.3.0
>         Content-Length: 0
> 
> -- 
> David Cunningham, Voisonics Limited
> http://voisonics.com/
> USA: +1 213 221 1092
> New Zealand: +64 (0)28 2558 3782

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-- 
Alex Balashov | Principal | Evariste Systems LLC

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