sr-users March 2023

sr-users@lists.kamailio.org

47 participants
67 discussions

Presence module and privacy
by Ihor Olkhovskyi 06 Apr '23

06 Apr '23

Hello! Is there any possibility to control more-or-less privacy related parameters of pua_dialoginfo module (like include_localremote) per subscription? Main idea is I want to show some users full info on the call other user is making, for a different user - just show fact of the call without any details. For now I'm only seeing some manual manipulation over XML based on user who is receiving NOTIFY, but maybe I'm trying to invent a weel here. -- Best regards, Ihor (Igor)

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Handling stateless replies with kemi
by Ovidiu Sas 03 Apr '23

03 Apr '23

Hello all, How can we handle stateless replies with kemi? tm has the following param: modparam("tm", "on_sl_reply", "stateless_replies") What's the proper way to map the "stateless_reply" onreply_route to a kemi function. I'm playing with the app_jsdt module. Thanks, Ovidiu

5 7

How to get top-most outbound via branch attribute from branched call?
by Benoît Panizzon 31 Mar '23

31 Mar '23

Hi all For rtpengine to correctly distinguish branched calls, the top-most via branch= parameter should be passed to it. I have attempted to use $via0 but that does not yet exist in Kamailio 5.4 So I did try to read $hdr(Via) which I guess returns an array and then access: but this returns the inbound via, not the one generated on the branched call. How can this be accomplished with kamailio 5.4? -- Mit freundlichen Grüssen -Benoît Panizzon- @ HomeOffice und normal erreichbar -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________

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CANCEL timeout in branch route does not trigger any failure routes
by Richard Chan 31 Mar '23

31 Mar '23

Hi Kamailio users How can I get a failure route to trigger in timeout-to-CANCEL in a parallel forking scenario? Parallel forking test scenario 1. one(the main - 0) branch picks up the call 2. 2nd branch sends CANCEL (expecting 487 etc) - but the callee does not send any replies Result: No failure route handlers are called on timeout of this CANCEL - that is kamailio attempts the CANCEL 4 times but neither tm.t_on_failure_route, tm.t_on_branch_failure handlers are called. Any suggestions on how to resolve this? Regards Shih-Ping

3 2

Rancher, AWS, and Elastic IP
by Calvin E. 30 Mar '23

30 Mar '23

I'm looking for documentation//howto/advice/best practices for running Kamailio under Kubernetes on AWS via Rancher. Specifically, how to manage the public/Elastic IP. This is a load balancer (dispatcher) scenario with rtpengine for receiving inbound calls from a DID provider, but a similar configuration might be used for clients. I'm open to using an AWS load balancer, and would like to scale with multiple Kamailio pods behind a single public IP. I'd rather use Rancher-managed EC2 than pay extra for EKS, unless EKS can cancel out its own cost. This sounds like it should be a solved problem, just complex. I see blogs and videos out there, but it's not always obvious if their content is current. Anyone want to help me peel this onion? -Calvin

4 6

MongoDB query from Kamailio help needed
by Edo 28 Mar '23

28 Mar '23

Help is needed. I know I have seen a similar problem either via email or google search but for the life of me I cannot find it now. I am using: Ubuntu: 5.4.0-144-generic #161-Ubuntu SMP Fri Feb 3 14:49:04 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux Kamailio: version: kamailio 5.3.9 (x86_64/linux) -- This is a dev platform and I can update kamailio if needed. I am trying to query a mongodb collection for the phone number stored under “did” as an integer and make a decision based on the returned result (boolean is sufficient for this decision). I don’t know what I am doing wrong here. Any help will be well appreciated ##### This is the insert statement into the telephone db from a linux script db.c$coll.insertOne({"did":parseInt($(cut -d_ -f 1 <<< $1)), "callDesc":$(cut -d_ -f 1 <<< $1)}))" >> $(cut -d_ -f 1 <<< $1).js did is stored as an integer and the callDesc is stored as presented by $rU { "_id" : ObjectId("641580b4863678d0ba38d69a"), "did" : 1XXXXXXXXXX, "callDesc" : 1XXXXXXXXXXXX } > db.c234.find() { "_id" : ObjectId("641580b4863678d0ba38d69a"), "did" : 2XXXXXXXXXXXX, "callDesc" : 2XXXXXXXXXXXX } > db.c234.find() { "_id" : ObjectId("641580b4863678d0ba38d69a"), "did" : 3XXXXXXXXXXXX, "callDesc" : 3XXXXXXXXXXXX } > Kamailio config: ..... ..... # --- mongodb module loaded 202201082322 loadmodule "ndb_mongodb.so" if (uri==myself) { sl_send_reply("100", "Trying to check if uri is myself $rU $ru"); #return; #Adding this to test connection to mongodb…. This worked and the reply was sent to the endpoint if(*mongodb_cmd_simple*("mongodbsrv1", "telephone", "cXXX”, "{ \"collStats\": \"cXXX\” }", "mgr1")) { sl_send_reply("183", "I got inside this message loop $rU found in mongodb"); xlog("response from mongodb is [[$mongodb(mgr1=>value)]]\n"); } # End of the test #This is to run the actual db query to test if the phone number is in the mongodb…. I am not successful at this query even when the number is known to be in the database if(*mongodb_find_one*("mongodbsrv1", "telephone", "cXXX”, "{\"did\" : \"$rU\" }", "mongoResponse1")) { # Route to confirmed route here -- 202302212032 sl_send_reply("183", "I got inside this mongodb message loop"); route(CONFIRMED_ROUTE); xlog("response from mongodb is [[$mongodb(mongoResponse1=>value)]]\n"); } else { route(UNCONFIRMED_ROUTE); } } #append_hf("P-hint: outbound\r\n"); route(RELAY); #exit; } Please help. -- ----- Ekunwe Tel: 601.497.3932

2 2

Three year old issue with a new CVE vulnerability report being reported
by Olle E. Johansson 28 Mar '23

28 Mar '23

Hi Kamailians! A new CVE with a critical severity level was published recently for an almost three year old bug, which was also fixed and released three years ago (CVE-2020-27507). The issue was fixed in Kamailio 5.4.2 and is not present in newer releases. The Kamailio project has unfortunately not been involved in the CVE process or been informed about this old issue being published at this time. We take vulnerability handling seriously and our process is documented at: https://www.kamailio.org/wikidocs/security/policy/ The latest stable branch is 5.6, with v5.6.4 released out of it. Reference: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-27507 Best regards and thanks for flying Kamailio! The Kamailio dev team through /Olle

4 3

json RPC syntax
by Volker Denneberg 28 Mar '23

28 Mar '23

Hello, I am trying to get json RPCs running. simpleequests seem to work, but I can't figure out how to pass parameters. For example curl --header 'Content-Type: application/json' --data-binary '{"id": 1,"jsonrpc": "2.0", "method": "ul.db_users" }' http://localhost:8081/RPC/ { "jsonrpc": "2.0", "error": { "code": 500, "message": "Not enough parameters (table to lookup)" }, "id": 1 } According to http://www.kamailio.org/docs/docbooks/3.2.x/rpc_api/rpc_api.html#rpc.gettin… parameters dont have names and according to http://www.kamailio.org/docs/modules/devel/modules/usrloc.html#usrloc.r.db_… 1 parameter is required. I guessed adding "params":"location" => no error anymore, but still no result: curl --header 'Content-Type: application/json' --data-binary '{"id": 1,"jsonrpc": "2.0", "method": "ul.db_users", "params":"location"}' http://localhost:8081/RPC/ { "jsonrpc": "2.0", "result": { }, "id": 1 } Same result (no error) if I pass "params":"nonsense", so "params" seems to be kind of ignored ... What's the correct json syntax here or in general? Best regards, Volker

5 6

KEMI: app_jsdt_run_ex(): js loading state not initialized (call: ksr_htable_event)
by Ovidiu Sas 27 Mar '23

27 Mar '23

Hello all, While using KEMI with app_jsdt I noticed the following possible regression between 5.5 and 5.6. The following config is working ok on 5.5 but throws an error on 5.6: ERROR: app_jsdt [app_jsdt_api.c:555]: app_jsdt_run_ex(): js loading state not initialized (call: ksr_htable_event) kamailio.cfg: debug=2 children=1 log_facility=LOG_LOCAL0 log_name="k" mpath="/home/osas/src/kamailio/src/modules" loadmodule "htable/htable.so" modparam("htable", "event_callback", "ksr_htable_event") modparam("htable", "event_callback_mode", 1) loadmodule "kemix/kemix.so" loadmodule "app_jsdt/app_jsdt.so" modparam("app_jsdt", "load", "/usr/local/etc/kamailio/kamailio.js") cfgengine "jsdt" kamailio.js: function ksr_htable_event(evname) { KSR.info("ksr_htable_event(" + evname + ")\n"); } function ksr_request_route() { KSR.x.exit(); } If we load the htable module after app_jsdt, then the error is gone. Is there something new during init in 5.6 that requires specific module loading order? -ovidiu

2 2

Handling branch-level append_hf()
by Alex Balashov 27 Mar '23

27 Mar '23

Hi, I’ve got a situation where I catch a 302 redirect in a failure_route (branch #1), and use the Contact to set a custom header (append_hf()). This custom header is utilised on the subsequent branch (branch #2), but if that branch fails (e.g. due to 4xx-5xx response), the custom header is not preserved on subsequent branches (branch #3+). What’s the best way to preserve it across subsequent branches? The documentation for msg_apply_changes() says it cannot be used once the transaction is already created, and in any case, I have other branch-level changes in branch #2 that I _would_ like to revert on subsequent branch attempts (i.e. branch #3). I can certainly devise a transaction-persistent vehicle for this value which can be checked on every branch, but I wondered if there’s an easier and more best-practical way. Thanks! — Alex -- Alex Balashov Principal Consultant Evariste Systems LLC Web: https://evaristesys.com Tel: +1-706-510-6800

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sr-users March 2023