[SR-Users] dispatch REGISTER over TLS

Fri Nov 8 19:22:28 CET 2019

Hi,

Your config line for the dispatcher makes no sense for me.

1007 sip:10.0.0.100:5061;transport=tls 0 3 socket=tls:10.0.0.100:5061;
ping_from=sip:10.0.0.14

Means setid 1007 (like an group to arrange multiple targets) okay.
But sip:10.0.0.100:5061;transport=tls is the dispatcher target Uri. Where
your calls are placed when you call the dispatcher function with setid 1007.

In combination with socket=10.0.0.100:5061 (that indicates your Kamailio
socket, the proxy ip)
That you talking with yourself.

You should read the module documentations for dispatcher and tls.

Or describe your ip setup and your config a bit more.

Cheers
Karsten

sthustfo <sthustfo at gmail.com> schrieb am Fr., 8. Nov. 2019, 17:41:

> Hi Karsten, David,
>
> Thanks for your pointers. Earlier I was using mysql backend where the
> dispatch list was stored. Now following your suggestions, I have switched
> to dispatcher list in a file (/etc/kamailio/dispatcher.list) and put in the
> following
>
> # setid(integer) destination(sip uri) flags (integer, optional),
> priority(int,opt), attrs (str,optional)
> 1007 sip:10.0.0.100:5061;transport=tls 0 3 socket=tls:10.0.0.100:5061
> ;ping_from=sip:10.0.0.14
>
> Even with this, when HTTP request in, the same is upgraded to WS
> connection. But this gets closed after couple of seconds. Does the below
> log indicate anything?
>
> 9(1784) exec: *** cfgtrace:request_route=[xhttp:request]
> c=[/etc/kamailio/kamailio.cfg] l=1112 a=2 n=exit
>  9(1784) DEBUG: <core> [core/usr_avp.c:636]: destroy_avp_list():
> destroying list (nil)
>
> Is there any way to understand what's happening? I do not see any other
> error lin logs.
>
> Thanks.
>
>
>
> On Thu, Nov 7, 2019 at 2:34 PM Daniel-Constantin Mierla <miconda at gmail.com>
> wrote:
>
>> Hello,
>> On 06.11.19 20:46, Karsten Horsmann wrote:
>>
>> Hi,
>>
>> the sips Uri schemata is not used for tls with dispatcher.
>>
>> jumping in to clarify a bit about sips protocol schema. It doesn't imply
>> TLS as one may think HTTPS does it for HTTP. The sips is mandating that the
>> traffic goes over secure links, which can be IPSec/VPN or even just private
>> network, so it is ok using UDP or TCP when sips is present.
>>
>> In SIP, if TLS is wanted, then transport=tls has to be added to the URI.
>>
>> As for dispatcher, one more clarification: trasport=tls in attrs has
>> nothing to do with the destination address, so that has to be in the value
>> of the destination field, as Karsten gave in his example.
>>
>> And, as general note: better do not use sips at all, it can mess up some
>> nodes in the path, if you are not sure about the need of sips -- just do
>> uri;trasport=tls.
>>
>> Cheers,
>> Daniel
>>
>>
>> Here an example for flatfile dispatcher.list (need corrected values).
>>
>> The socket line must match an listen directive in your Kamailio.cfg.
>>
>>
>> root at sbc1:~# cat /etc/kamailio/dispatcher.list
>> # setid(integer) destination(sip uri) flags (integer, optional),
>> priority(int,opt), attrs (str,optional)
>> 1007 sip:sip.pstnhub.microsoft.com;transport=tls 0 3
>> socket=tls:212.xx.xx.xx:5061;ping_from=sip:sbc-d01.yourdomain
>>
>> Cheers
>> Karsten
>>
>> sthustfo <sthustfo at gmail.com> schrieb am Mi., 6. Nov. 2019, 20:32:
>>
>>> I have a basic setup where kamailio receives SIP over websocket (no WSS)
>>> and forwards to SIP server over TLS. I have enabled TLS in kamailio.cfg and
>>> added dispatcher node as sips:SIP_SERVER:5061 and transport=tls.
>>>
>>>
>>> +----+-------+------------------------+-------+----------+---------------+----------------+
>>> | id | setid | destination            | flags | priority | attrs
>>> | description    |
>>>
>>> +----+-------+------------------------+-------+----------+---------------+----------------+
>>> |  4 |     1 | sips:10.0.0.100:5061 |     0 |        0 | transport=tls
>>> | SIP SERVER |
>>>
>>> +----+-------+------------------------+-------+----------+---------------+----------------+
>>>
>>> Now when REGISTER is received over websocket, kamailio is responding
>>> with error code 500 and phrase "500 I'm terribly sorry, server error
>>> occurred (7/SL)". And on the console I see the following error messages.
>>>
>>> 12(33858) DEBUG: {1 2521 REGISTER o9q7ujqgin33qgp00abijv} <core>
>>> [core/md5utils.c:67]: MD5StringArray(): MD5 calculated:
>>> f1ecf7bcb659b07fe81e332e100044e5
>>> 12(33858) ERROR: {1 2521 REGISTER o9q7ujqgin33qgp00abijv} tm [ut.h:315]:
>>> uri2dst2(): no corresponding socket found for "10.0.0.100" af 2 (tls:
>>> 10.0.0.100:5061)
>>> 12(33858) ERROR: {1 2521 REGISTER o9q7ujqgin33qgp00abijv} tm
>>> [t_fwd.c:467]: prepare_new_uac(): can't fwd to af 2, proto 3  (no
>>> corresponding listening socket)
>>> 12(33858) ERROR: {1 2521 REGISTER o9q7ujqgin33qgp00abijv} tm
>>> [t_fwd.c:1735]: t_forward_nonack(): failure to add branches
>>> 12(33858) DEBUG: {1 2521 REGISTER o9q7ujqgin33qgp00abijv} tm
>>> [t_funcs.c:334]: t_relay_to(): t_forward_nonack returned error -7 (-7)
>>> 12(33858) DEBUG: {1 2521 REGISTER o9q7ujqgin33qgp00abijv} tm
>>> [t_funcs.c:352]: t_relay_to(): -7 error reply generation delayed
>>> 12(33858) exec: {1 2521 REGISTER o9q7ujqgin33qgp00abijv} ***
>>> cfgtrace:request_route=[RELAY] c=[/etc/kamailio/kamailio.cfg] l=587 a=24
>>> n=sl_reply_error
>>> 12(33858) DEBUG: {1 2521 REGISTER o9q7ujqgin33qgp00abijv} <core>
>>> [core/msg_translator.c:162]: check_via_address(): (10.0.0.14,
>>> hsvmphm3ps12.invalid, 0)
>>> 12(33858) DEBUG: {1 2521 REGISTER o9q7ujqgin33qgp00abijv} websocket
>>> [ws_conn.c:452]: wsconn_get(): wsconn_get for id [3]
>>>
>>> *tls.cfg contents*
>>> [client:default]
>>> method = TLSv1
>>> verify_certificate = yes
>>> require_certificate = yes
>>> private_key = /home/test/kamailio/internal.key
>>> certificate = /home/test/kamailio/internal.crt
>>> ca_list = /home/test/kamailio/ca_list.pem
>>>
>>> Any reason why this error is seen? Any inputs appreciated.
>>>
>>> Thanks.
>>> _______________________________________________
>>> Kamailio (SER) - Users Mailing List
>>> sr-users at lists.kamailio.org
>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>
>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing Listsr-users at lists.kamailio.orghttps://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
>> --
>> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
>> Kamailio World Conference - April 27-29, 2020, in Berlin -- www.kamailioworld.com
>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
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