Have you read the description of the RED algorithm? Are you sure you are generating appropriate traffic to cause a drop? That algorithm seems like it would be difficult to control/predict the drops accurately for a test. If you are sending a constant traffic volume to it, it never will drop.
If you are just testing, you may want to go with a simpler algorithm where you can more easily control when/how many are being dropped. The standard way to use the module for CPS is to use the SBT algorithm with a window_size of 1. [1] [1] https://opensips.org/docs/modules/3.2.x/ratelimit.html#param_window_size Ben Newlin From: Users <users-boun...@lists.opensips.org> on behalf of Adrien LACOMME <adrien.laco...@appliwave.com> Date: Friday, October 27, 2023 at 12:03 PM To: OpenSIPS users mailling list <users@lists.opensips.org> Subject: Re: [OpenSIPS-Users] Ratelimit usage EXTERNAL EMAIL - Please use caution with links and attachments ________________________________ Hello, I added this line to my code, in fact it's better to decrease the counter if I drop the call. But my problem is that the rl_check function never drop calls, I do not enter in the IF condition. For the algorithm, I'm actually just trying the module, I will probably not stay with RED. ________________________________ De : Users <users-boun...@lists.opensips.org> de la part de Wadii ELMAJDI | Evenmedia <wa...@evenmedia.fr> Envoyé : vendredi 27 octobre 2023 17:39 À : OpenSIPS users mailling list <users@lists.opensips.org> Objet : Re: [OpenSIPS-Users] Ratelimit usage Hello Adrien Try : if (!rl_check("test1", 1, "RED")) { rl_dec_count("test1") send_reply(487, "Request Terminated: CPS limit exceeded"); exit; } * If you are using ratelimit to limit only successful traffic, you need to explicitely decrease the counter for the declined calls using the rl_dec_count() function also I’m not sure RED is the best algorithm for your usecase. De : Users <users-boun...@lists.opensips.org> De la part de Adrien LACOMME Envoyé : vendredi 27 octobre 2023 17:06 À : users@lists.opensips.org Objet : [OpenSIPS-Users] Ratelimit usage Hi, I'm trying to implement CPS limitation on OpenSIPS and I got some difficulties to understand how ratelimit module works. Here is the setup (I want to limit cps to 1) : if (!rl_check("test1", 1, "RED")) { send_reply(487, "Request Terminated: CPS limit exceeded"); } I tried to make few calls simultaneously but rl_check return is always FALSE. Here is the log I got : 2023-10-27T16:52:19.792337 SBC /usr/sbin/opensips[137782]: DBG:ratelimit:w_rl_check: Pipe test1 counter:1 load:0 limit:1 should NOT be blocked (0x7fcae1504888) 2023-10-27T16:52:19.804064 SBC /usr/sbin/opensips[137781]: DBG:ratelimit:w_rl_check: Pipe test1 counter:2 load:0 limit:1 should NOT be blocked (0x7fcae1504888) 2023-10-27T16:52:22.872991 SBC /usr/sbin/opensips[137782]: DBG:ratelimit:w_rl_check: Pipe test1 counter:3 load:0 limit:1 should NOT be blocked (0x7fcae1504888) 2023-10-27T16:52:22.918123 SBC /usr/sbin/opensips[137781]: DBG:ratelimit:w_rl_check: Pipe test1 counter:4 load:0 limit:1 should NOT be blocked (0x7fcae1504888) Shouldn't the module block calls when the counter goes to 2 ? Or is he checking the load value to block ? If yes, why the load value isn't incremented ? Regards, Adrien LACOMME
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