[Freeswitch-users] Detecting call loops while not relying on the hop counter

[Victor Chukalovskiy]

Hello,

I have a scenario where FS routes hundreds of calls and loop detection 
is needed. Adding to that, I can't rely on hop counter being decremented 
by other network elements. I can use limit in the following fashion:

<action application="limit" data="hash loop_test 
${caller_id_number}${destination_number} 10 !NORMAL_CIRCUIT_CONGESTION"/>

So, whenever I have 10 calls with the same calling and called party 
number combination, limit will kick-in and break the loop.

*Question*: Is this efficient from the perspective of how "limit" and 
hash back-end work? Once I have a few thousand calls, all having unique 
"resource" will this become resource hungry?
My main concern is that it will create hundreds of hash entries all 
having the same realm but unique resource.

Anyone knows a better solution?

Thank you,
Victor
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