[SR-Users] cr default route

[marius zbihlei]

On 09/02/2011 03:52 PM, caio wrote:
> Hello,
>
Hello,
> The documentation of carrierroute says "If flags and mask are not 
> zero, and no match to the message flags is possible, no routing will 
> be done." Then is there any route entry which can act as default gw 
> (like an always-match entry)?
>
 From what I see in the code and documentation, no.
> For example this 'carrierroute' table:
>
>    +---------+--------+-------------+-------+------+------+
>    | carrier | domain | scan_prefix | flags | mask |
>    +---------+--------+-------------+-------+------+------+
> 1  |       1 |      1 | 156         |     500 |    0 |
> 2  |       1 |      1 |             |     0 |    0 |
> 3  |       1 |      2 |             |     0 |    0 |
>    +---------+--------+-------------+-------+------+-
>
> Here if ruri is 156xx, and there is no flag set, then the cr module 
> does not find a match because of the non-zero value in the flag column 
> (entry 1).
> But I want to route this call via carrier1 domain1 and scan_prefix 
> empty-value entry (entry 2).
>
It seems that you can't select route 2, but you can select rule 3. For 
example

if(!cr_route("default", "1", "$rU", "$rU", "call_id")){
     if(!cr_route("default", "2", "$rU", "$rU", "call_id")) #here rule 3 
would be selected because domain is 2, not 1
         send_reply("403", "Not allowed");
}

So you can have a special domain for each carrier that has no flags set 
and just acts like a catch all construct. Performance should not be 
impacted.

Hope this helps.
Marius

> How can I set a default route entry here? Is possible with cr? Now I 
> only find it possible via a pstn.def_gw_ip variable.
> Thank you,
>
> Claudio


-- 
Zbihlei Marius

Head of
Linux Development Services Romania

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