[SR-Users] multidomain: running multiple kamailio on one host

[MÉSZÁROS Mihály]

2010-11-05 09:31 keltezéssel, Alex Balashov írta:
> On 11/05/2010 04:10 AM, MÉSZÁROS Mihály wrote:
>> Hello all!
>>
>> Is there any known problem to run multiple kamailio/sip-router instance
>> in one host.
>> I need this to handle multidomain situation.
>>
>> The multidomain what is built in is not satisfactory, because the UA-s
>> what are from varying vendors.
>> And some has strange or a very limited SIP implementation.
>> Some can only register ip address, some can use RFC3263, but some can
>> use only DNS A record. :(
>>
>> Any answer, suggestion appreciated very well!
>
> I still don't see why handling multiple domains in a single instance 
> would be a problem.
>
I will try to explain where i saw the problem.
Of course it can be that i am wrong, so AFAIK ..


If there is domain atlanta.test with with such a DNS.

$TTL    60
$ORIGIN atlanta.test.
@       IN      SOA     a1.atlanta.test. root.a1.atlanta.test. (
                      2009071301         ; Serial
                          604800         ; Refresh
                           86400         ; Retry
                         2419200         ; Expire
                          604800 )       ; Negative Cache TTL
;
@               IN      NS      a1
@               IN      NS      a2
a1              IN      A       192.168.0.1
a2              IN      A       192.168.0.2
;;                              order   pref    flags   service        
regexp replacement
@               IN      NAPTR   10      10      "s"     "SIPS+D2T"     
""     _sips._tcp
@               IN      NAPTR   20      10      "s"     "SIP+D2T"      
""     _sip._tcp
@               IN      NAPTR   30      10      "s"     "SIP+D2U"      
""     _sip._udp
;;                              Priority        Weight  Port    Target
_sips._tcp      IN      SRV     10              0       5061    a1
_sips._tcp      IN      SRV     20              0       5061    a2
_sip._tcp       IN      SRV     10              0       5060    a1
_sip._tcp       IN      SRV     20              0       5060    a2
_sip._udp       IN      SRV     10              0       5060    a1
_sip._udp       IN      SRV     20              0       5060    a2

    * UA type1
      It is implementing RFC3263 correctly. (Very rare such a good
      implementation.)
      so it will send a register
      REGISTER atlanta.test
      To:alice at atalnta.test
          o Correctly this client will use the proxy preference and in
            best case use tcp + tls.
    * UA2
      It is implementing only dns A record support.
      so it will send a register
      REGISTER a1.atlanta.test
      To: alice at a1.atlanta.test
    * UA3
      It is a strange UA resolves everything to ip address.
      so it will send the register
      REGISTER 192.168.0.1
      To: alice at 192.168.0.1
    * UA4
      Maybe there are more case, and can be continued. But till now i
      faced only to the above three cases.


Where i saw the problem with kamailio multidomain setup (AFAIK):
I want to use the three as one "sip routing domain" or i don't know how 
to name it correctly.
When it saves the AoR <=> Contact bindings to location database (mysql), 
the registrar will create and save the contacts to three separated 
domain according to the above three UA behavior:

    * atlanta.test
    * a1.atlanta.test
    * 192.168.0.1

So i must add three times the user in subscriber table for the three 
domain, to allow the user alice to authenticate from any UA.
And i will have three domain in location database for only one "sip 
routing domain".

So if i want to have a second domain, called biloxi.test with similar 
setup, on the same host where atlanta.test is,
then i get bigger mess. And i have six domain...
I hope you see where i have a problem.
And AFAIK i can't set to registrar function save() the domain, if i use 
database backend.

Highly appreciated if You can suggest a solution for this.
It will be nice if you, or anyone can suggest some solution to this problem.

Many Thanks!

Cheers,
Misi
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