Hey All,I was wanting to submit a feature request for loop detection. Specifically NOT SIP loop detection, but when another technology / B2BUA is involved where max-forwards can't be used. This is for big loops.
The idea is similar to the pike module. However, you bascically look at the to_did and the source IP and if you see more than X calls in Y period, begin to reject them for Z seconds. Simple enough. This has come up a dozen times for me and for now I have to handle it with kludge of memcache, and perl scripts to detect these issues in my cdr. The loops are a bit nuts and are always the results of someone doing something stupid (but hey, it does happen). The loops are like, my customer sends me a call to one of thier own DIDs (they've misrouted it to me) and I send it to my carrier, who sends it to the pstn, back to my customer, back to me, etc.. There may be a ss7 portion in there so it keeps looking like a new call on the SIP side. So without anything, this can clog up my call paths pretty quickly, the proposed feature would blacklist the source_ip to_did combination for a period of time to kill the loop. Thoughts? -Brett
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