Without any external dependencies. Not sure how you're populating your pool of numbers for the caller id, but this generally works:
``` ## Populate your list however you want: $(avp(cid)) = "15555551000"; $(avp(cid)) = "15555551001"; $(avp(cid)) = "15555551002"; $(avp(cid)) = "15555551003"; $(avp(cid)) = "15555551004"; $(avp(cid)) = "15555551005"; $(avp(cid)) = "15555551006"; ## $avp(cid) now holds 7 values.
## A random integer using the remainder $RANDOM divided by the number of ## elements: $var(rand) = $RANDOM mod $cnt($avp(cid));
## Use the random integer to get the CID out of the list $var(rand_cid) = $(avp(cid)[$var(rand)]); ```
Ben Kaufman Sr. VoIP Engineer - BCM One
+1.612.735.9309 bkaufman@bcmone.com 24 hour client support: +1.855.639.6300
-----Original Message----- From: sr-users sr-users-bounces@lists.kamailio.org On Behalf Of Fred Posner Sent: Wednesday, May 4, 2022 3:02 PM To: sr-users@lists.kamailio.org Subject: Re: [SR-Users] Tips on picking random element from a list
If you were choosing random numbers from a pool of numbers, you could always lets say store the caller-id's in redis, connect kamailio to redis, and just use the RANDOMKEY function of redis to return a caller id.
Fred Posner | palner.com o: +1 (212) 937-7844
On 5/4/22 15:43, Ben Kaufman wrote:
How "random" do you need to be here? Given your example, a quick thought would be to just iterate over a list, using a counter and calculating the modulo (remainder) when dividing it by the number of elements you have.
Another thought would be to use the core_hash() function over the call-id. https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.k amailio.org%2Fdocs%2Fmodules%2F5.6.x%2Fmodules%2Fcfgutils.html%23cfgut ils.f.core_hash&data=05%7C01%7Cbkaufman%40bcmone.com%7C233860f6470 7428040a008da2e090ef7%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637 872913679726971%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2 luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=zdoWq%2 FANIgusBipnbAD4%2BJpDzMc6fNrilEawt5rV2f8%3D&reserved=0 https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww. kamailio.org%2Fdocs%2Fmodules%2F5.6.x%2Fmodules%2Fcfgutils.html%23cfgu tils.f.core_hash&data=05%7C01%7Cbkaufman%40bcmone.com%7C233860f647 07428040a008da2e090ef7%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C63 7872913679726971%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV 2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=zdoWq% 2FANIgusBipnbAD4%2BJpDzMc6fNrilEawt5rV2f8%3D&reserved=0
Of course, those aren't really "random" in the mathematical sense, but if you're goal is "you have a pool of 10 numbers and want them to be assigned to the p-asserted-identity URI user each one-tenth of the time", either of the above methods should work. Hashing the call-id would even ensure that the same call will get the same value if you have to recalculate it.
*Ben Kaufman*
/Sr. VoIP Engineer - BCM One/
+1.612.735.9309
bkaufman@bcmone.com mailto:bkaufman@bcmone.com
24 hour client support: +1.855.639.6300
*From:* sr-users sr-users-bounces@lists.kamailio.org *On Behalf Of *Joel Serrano *Sent:* Tuesday, May 3, 2022 8:40 PM *To:* Henning Westerholt hw@gilawa.com *Cc:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Tips on picking random element from a list
I did, but I don't see how to limit the range:
From the docs: Returns a random value from the [0 - 2^31) range.
Is there a way to limit the range from 1-100 for example? Or maybe the way is to use $RANDOM and just rely on the first/last 2 digits (essentially a 00-99 range)?
On Tue, May 3, 2022 at 10:40 AM Henning Westerholt <hw@gilawa.com mailto:hw@gilawa.com> wrote:
Hello, what about just using this PV: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fkamailio.org%2Fdocs%2Fmodules%2F5.5.x%2Fmodules%2Fcfgutils.html%23idm438&data=05%7C01%7Cbkaufman%40bcmone.com%7C233860f64707428040a008da2e090ef7%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637872913679726971%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=qW9OEMTf1MeQl%2FRKqRLah4WLQAogKViHQeS%2FRZTqgN0%3D&reserved=0Cheers, Henning -- Henning Westerholt - https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fskalatan.de%2Fblog%2F&data=05%7C01%7Cbkaufman%40bcmone.com%7C233860f64707428040a008da2e090ef7%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637872913679726971%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=xLGoPpD2479CdKjMhiWY67lLq4c8TqmyurLTepGqQTo%3D&reserved=0Kamailio services - https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgilawa.com%2F&data=05%7C01%7Cbkaufman%40bcmone.com%7C233860f64707428040a008da2e090ef7%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C637872913679726971%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W7RpDwuZE%2BL%2BkFtj98XacFKD6JcnukPdg36I0JyD%2Fv8%3D&reserved=0*From:*sr-users <sr-users-bounces@lists.kamailio.org <mailto:sr-users-bounces@lists.kamailio.org>> *On Behalf Of *Joel Serrano *Sent:* Tuesday, May 3, 2022 6:20 PM *To:* Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org <mailto:sr-users@lists.kamailio.org>> *Subject:* [SR-Users] Tips on picking random element from a list Hi Everyone, I have to implement a flow where outbound calls get their caller-id set with a random number from a pool. I've been looking around and, as most of the time, there are tons of ways to implement something like this... This is a simple implementation, the number pool is fixed and will not change (so I could have it hard-coded in the config if required). My initial approach was: 1- Try to keep it simple, with no dependencies, and all done in the config script. 2- If #1 is "ugly", then I'd probably go with some inline code using python/lua/etc 3- If #2 is "ugly", then I'd go with having the info in a DB and just run a query I think #2 and #3 might be overkill for something so "simple" but I haven't had to work too much with randomness in Kamailio, so any tips/suggestions on where to store the number list and how to pick one randomly would be awesome! Thanks!! Joel.
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