sr-users December 2022

sr-users@lists.kamailio.org

54 participants
62 discussions

Re: [SR-Users] uac_req_send() multi-process synchronization problem

by Henning Westerholt

Hello, please keep the list in CC. Not sure what you mean by multi-process safe. The functions are safe to use in a kamailio multi-process context, relevant sections should be protected by internal locks etc.. Regarding query location manually by SQL client, its better to use the provided functions from the usrloc/registrar module instead. Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com<https://gilawa.com/> From: riffs(a)sina.cn <riffs(a)sina.cn> Sent: Thursday, December 1, 2022 10:47 AM To: Henning Westerholt <hw(a)gilawa.com> Subject: Re: Re: [SR-Users] uac_req_send() multi-process synchronization problem To confirm that. Are reg_fetch_contacts and unregister_ruid multi-process safe? ________________________________ riffs(a)sina.cn<mailto:riffs@sina.cn> From: riffs(a)sina.cn<mailto:riffs@sina.cn> Date: 2022-12-01 16:35 To: Henning Westerholt<mailto:hw@gilawa.com> Subject: Re: RE: [SR-Users] uac_req_send() multi-process synchronization problem Hello Thank you for your reply very much. My LOCATION is stored in the MYSQL database, and I also set the event_callback parameter of TCPOPS. modparam("tcpops", "event_callback", "ksr_tcpops_event") At the same time.I also deleted the contact inside the function function ksr_tcpops_event(evname) local tcpconnid = KSR.pv.get("$conid") or "0" if (evname == "tcp:reset" or evname == "tcp:closed") and (tonumber(tcpconnid) ~= 0) then local sql = string.format("select * from location where tcpconnid=%s", tcpconnid) local count, rows = execute_select(sql) if count > 0 then KSR.registrar.unregister_ruid("location", rows[1].contact, rows[1].ruid) end end return 1 end When I use use_req_send(), I use the following sql statement to query location string.format("select * from location where username='%s'", reciever) I think because the query sql is executed before the execution of unregister_ruid completes, the location of user A can still be queried. If unregister_ruid and reg_fetch_contacts are multi-process safe. I use reg_fetch_contacts query location to avoid this problem. Is that so? thanks very much ________________________________ riffs(a)sina.cn<mailto:riffs@sina.cn> From: Henning Westerholt<mailto:hw@gilawa.com> Date: 2022-11-30 18:18 To: Kamailio (SER) - Users Mailing List<mailto:sr-users@lists.kamailio.org> CC: 刘建峰<mailto:riffs@sina.cn> Subject: RE: [SR-Users] uac_req_send() multi-process synchronization problem Hello, not sure if I fully understand the problem. But regarding another user is registered with the same IP address as a previous user, there are several mitigations. To give two options: you could choose a really short re-registration time, you could use TCP and when you lose the connection you delete the contact. Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com<https://gilawa.com/> From: sr-users <sr-users-bounces(a)lists.kamailio.org<mailto:sr-users-bounces@lists.kamailio.org>> On Behalf Of ??? Sent: Wednesday, November 30, 2022 2:57 AM To: sr-users(a)lists.kamailio.org<mailto:sr-users@lists.kamailio.org> Subject: [SR-Users] uac_req_send() multi-process synchronization problem When I use uac_req_send() to send a MESSAGE to the client. Will the following occur? The result of the message sent to user A is that B has received it. From the logs, the address of user A in the location table is the same as the IP address and port of user B, and the information of user A in the location table is not deleted in time. I took the address of user A directly from the location table without using KSR.registrar.reg_fetch_contacts(). If I use KSR.registrar.reg_fetch_contacts() can this be avoided. This is a multi-process synchronization problem, after user A registers, the IP port information in the address is 172.16.22.222:12345, and then user A disconnects the link because of some abnormal conditions, but it is not normal to cancel the registration, the socket link has failed, but it has not had time to delete the location, at this time user B registers, whether will it get the same IP port information as user A 172.16.22.222 : 12345, if possible? User A's location still exists, Using KSR.registrar.reg_fetch_contacts() TO query user A's location, and then using uac_req_send() to send a message to user A, User B will receive the MESSAGE. Whether this problem occurs? 从 Windows 版邮件<https://go.microsoft.com/fwlink/?LinkId=550986>发送

1 year, 4 months

Getting the name of an already set onreply_route

by Denys Pozniak

Hello! Is it possible to find out the name of the onreply_route that was set before? Something like this: t_on_reply("MANAGE_REPLY"); ... if ( t_is_set("onreply_route") ) { get_onreply_route_name(); ... } -- BR, Denys Pozniak

1 year, 4 months

Fosdem 2023 - CfP

by Daniel-Constantin Mierla

Hello, should anyone be interested to present or just go to FOSDEM 2023, note that it is going to take place in Brussels during February 4-5, 2023. With a increasing demand on topics to be covered, many more devrooms were accepted and Real Time Communication devroom has half a day available on the afternoon of February 5, 2023. The RTC Devroom call for presentations is open, more details at; - https://lists.fosdem.org/pipermail/fosdem/2022q4/003479.html Check also the other accepted devrooms, maybe one suits better for your work with open source nowadays and you can submit proposals to them: - https://fosdem.org/2023/news/2022-11-07-accepted-developer-rooms/ Cheers, Daniel -- Daniel-Constantin Mierla -- www.asipto.com www.twitter.com/miconda -- www.linkedin.com/in/miconda

1 year, 4 months

Call drops after 1 minute

by Christian B Wiik

Greetings! I have a CentOS setup in AWS where all my calls are dropped after about a minute or so. I realize this typically is a NAT problem, but I can't see where my error is. Sound is fine both ways. Kamailio is set with WITH_NAT and I use rtpproxy like this: OPTIONS="-l 10.1.2.10 -s udp:127.0.0.1:7722 -d INFO:LOG_LOCAL5 -m 35010 -M 35110 -A 54.171.168.48" (10.1.2.10 is the local IP for CentOS) Tested with MicroSIP and Linphone and tried numerous configurations. It seems the receiving client is not able to verify the call has been set up, and disconnects. MicroSIP has the status "Connecting..." until it disconnects. All tips appreciated. Will post configuration and logs if needed. Kamailio version 5.6.2 from rpm and rtpproxy 2.1.0 compiled from source. -- Regards Christian B. Wiik

1 year, 4 months

How to configure Kamailio to send only DNS A query

by Arun Kumar

Hello All, I have a setup where the DNS server is configured with only A record. When the Kamailio receives the request it performs a DNS SRV query for which it receives a response with "no such name". But later a DNS A query is sent which gets resolved and the request is forwarded. I would like to know that is there any configuration that can be done in Kamailio so that it will perform only DNS A query directly instead of SRV query? If so could you please help me know how to do it Thanks and Regards Arun

1 year, 4 months

outbound Edge Proxy

by Giovanni Iamonte

Dear List In the last week I try to figure out how I can put in place a configuration that use an edge proxy and a register by using kamailio 5.6, but i am facing some issues. Scenario: We are using on ubuntu 20.04, HAproxy and Kamailio 5.6. We have configured a Kamailio register that, in the following case, perfectly works. ______ __ __________ TLS | | TLS | | Client ------------------ > | NAT |-----------> | Kamalio | in |_HAProxy | out in | Register | |_________| | | |________ _| Now we want to put a kamailio edge proxy before the kamailio Register, please take a look to the below picture ______ ______ __ _________ ___________ TLS | | TLS | | TCP | | Client ------------------ > | NAT |-----------> | Kamalio | -------------> | Kamailio | in |_HAProxy | out in | Edge | out in | Register | |_________| | Proxy | | | |_________| |___________| HAproxy -> sip-test.example.com Kamailio edge proxy -> 192.168.58.1 Kamailio Register -> 192.168.58.15 The kamailio Edge has been configured as indicated in the outbound module example. When a transaction such as REGISTER or SUBSCRIBE reach the "Kamailio Register" the Record-Route and Via headers are correct and it works. When the transaction such as MESSAGE or INVITE reach the "Kamailio Register" it does not work and below you can see the message and the error. Note that the Record-Route and Via headers are the same as the previous message REGISTER and SUBSCRIBE. Dec 6 11:57:09 qcast-webserver-dev /usr/sbin/kamailio[15340]: INFO: {1 40742 MESSAGE YsfZ7Rq-WGw33NUn9AFMWEuurzryvzET} <script>: SIPMessage-in-request = 192.168.58.1:53606-sip:s-user.02@sip-dev.example.com-MESSAGE sip:s-user.02@sip-dev.example.com SIP/2.0 Record-Route: <sip:192.168.58.1:15006;transport=tcp;r2=on;lr> Record-Route: <sip:sip-test.example.com:16005;transport=tls;r2=on;lr> Via: SIP/2.0/TCP 192.168.58.1:15006;branch=z9hG4bKa257.add27f134dd83c78aef13ca7798f87ca.0;i=6 Via: SIP/2.0/TLS 192.168.58.1:39592;received=192.168.58.1;rport=39592;branch=z9hG4bKPjajkY.0NlW2AFuz3.BRaKH4EdvdmQTs9L;alias Max-Forwards: 69 From: <sip:s-user.03@sip-dev.example.com>;tag=VnOekkKsq4tLhFAywXzbxLXxIesWscn3 To: <sip:s-user.02@sip-dev.example.com> Call-ID: YsfZ7Rq-WGw33NUn9AFMWEuurzryvzET CSeq: 40742 MESSAGE Accept: text/plain, application/im-iscomposing+xml Content-Type: text/plain Content-Length: 59 ################## MESSAGE ################### Dec 6 11:57:09 qcast-webserver-dev /usr/sbin/kamailio[15340]: INFO: {1 40743 MESSAGE YsfZ7Rq-WGw33NUn9AFMWEuurzryvzET} <script>: SIPMessage-in-request = 192.168.58.1:53606-sip:s-user.02@sip-dev.example.com-MESSAGE sip:s-user.02@sip-dev.example.com SIP/2.0 Record-Route: <sip:192.168.58.1:15006;transport=tcp;r2=on;lr> Record-Route: <sip:sip-test.example.com:16005;transport=tls;r2=on;lr> Via: SIP/2.0/TCP 192.168.58.1:15006;branch=z9hG4bKb257.83b972054df1675806975159ae1f1e43.0;i=6 Via: SIP/2.0/TLS 192.168.58.1:39592;received=192.168.58.1;rport=39592;branch=z9hG4bKPjfan-Tte.vtL8brkWb20wm.5b8iuVEtQV;alias Max-Forwards: 69 From: <sip:s-user.03@sip-dev.example.com>;tag=VnOekkKsq4tLhFAywXzbxLXxIesWscn3 To: <sip:s-user.02@sip-dev.example.com> Call-ID: YsfZ7Rq-WGw33NUn9AFMWEuurzryvzET CSeq: 40743 MESSAGE Accept: text/plain, application/im-iscomposing+xml Proxy-Authorization: Digest username="s-user.03", realm="sip-dev.example.com", nonce="Y48hMWOPIAW7JeSQ7/a+cuJ1gKwT8hrC", uri="sip:s-user.02@sip-dev.example.com", response="3b7c34476443e5f1125fa460a4981180", cnonce="3AT-ZMwyfpgaMwlulh5cq5vJHi75-wnz", qop=auth, nc=00000001 Content-Type: text/plain Content-Length: 59 Dec 6 11:57:09 qcast-webserver-dev /usr/sbin/kamailio[15340]: WARNING: {1 40743 MESSAGE YsfZ7Rq-WGw33NUn9AFMWEuurzryvzET} <core> [core/forward.c:228]: get_send_socket2(): protocol/port mismatch (forced tcp:192.168.58.15:15006, to tls:192.168.58.1:60982) Dec 6 11:57:09 qcast-webserver-dev /usr/sbin/kamailio[15340]: ERROR: {1 40743 MESSAGE YsfZ7Rq-WGw33NUn9AFMWEuurzryvzET} tm [ut.h:315]: uri2dst2(): no corresponding socket found for "192.168.58.1" af 2 (tls:192.168.58.1:60982) Dec 6 11:57:09 qcast-webserver-dev /usr/sbin/kamailio[15340]: ERROR: {1 40743 MESSAGE YsfZ7Rq-WGw33NUn9AFMWEuurzryvzET} tm [t_fwd.c:471]: prepare_new_uac(): can't fwd to af 2, proto 3 (no corresponding listening socket) Dec 6 11:57:09 qcast-webserver-dev /usr/sbin/kamailio[15340]: ERROR: {1 40743 MESSAGE YsfZ7Rq-WGw33NUn9AFMWEuurzryvzET} tm [t_fwd.c:1754]: t_forward_nonack(): failure to add branches Dec 6 11:57:09 qcast-webserver-dev /usr/sbin/kamailio[15340]: ERROR: {1 40743 MESSAGE YsfZ7Rq-WGw33NUn9AFMWEuurzryvzET} sl [sl_funcs.c:372]: sl_reply_error(): stateless error reply used: I'm terribly sorry, server error occurred (7/SL) based on what we have understood in the message headers "Via" and Record-Route" there are the right information to reach back the proxy Edge, but looking to the error message it seems that the kamailio register try to reach back the proxy edge through the TLS instead of using the TCP. Could someone put me in the right direction. Thanks Regards -- ------------------------------------------------------------------------ Ing. Giovanni Iamonte Developments and technologies area Quintetto Srl Via Monte Navale, 1 10015 - Ivrea (TO)  mobile: +39 393 9196310  tel: +39 0165 1845290  e-mail: giovanni.iamonte(a)quintetto.it  web: www.quintetto.it

1 year, 4 months

Packet processing order

by Jawaid Bazyar

Hi, I have experienced out of order packet processing when testing a simple Kamailio config. The configuration is as follows, basically: request_route{ record_route(); enum_query(); xlog("INVITE ENUM query - To URI $tU"); forward(); } I saw this thread from 2020: https://www.mail-archive.com/sr-users@lists.kamailio.org/msg11786.html The issue seems to be that kamailio process scheduling is naïve – i.e., incoming SIP packets are processed without regard to whether packets received before this one, are currently being processed. This means any packets after the initial INVITE that require more processing, can get reordered. In my test lab I have: SIPp – UAC Kamailio Proxy SIPp – UAS The proxy uses enum NAPR lookups to route calls to +13038151000 to the UAS. Now, if I do SIPp UAC o SIPp UAS directly, I have no problems – no out of order packets. It is only when I introduce Kamailio in the middle that I get OOO packets. See the images attached: uac-to-proxy, proxy, and proxy-to-uas. In this example, Kamailio OOO causes SIPp UAC to fail to “generate audio” – because UAC does not see packets in the correct order, I never turns on the simulated audio. Calls that have in-order dialogs, work fine, and SIPP UAC “pauses” 10 seconds to simulate a phone call. So far, the error rate runs from 1/1000 to around 1/200 – pretty bad. In the thread, a few things were suggested. Have fewer kamailio processes than cores: Did not resolve issue. Try route_locks_size = 256 Did not resolve issue. Though, it did alter it somewhat. But, it is not clear to me how this works – would this setting restrict the number of open calls to 256? Have only one kamailio process: (“children=1”) This works. “Works”, I should say, because this would greatly restrict total platform scalability to a point where it is probably useless for my application. I saw the same issue discussed in the OpenSIPS mailing list from 2010, and the response was “this is not a bug”. Well, I respectfully beg to differ with both OpenSIPS and Kamailio – it IS a bug. I don’t think a proxy should reorder packets involved in a call in a non-deterministic way. In the Kamailio list thread, Alex Balashov discusses the contortions he has to go through to avoid repercussions from this issue. Kamailio as-is probably works fine for relatively low-volume operations. And a lot of the feedback is “why are out of order packets a problem?” OK, sure, in the very specific example given in the 2020 thread, maybe who cares. But in my thinking, there is absolutely nothing preventing Kamailio from generating much more serious OOO scenarios that would cause calls to fail. In my example, Kamailio OOO causes SIPp to fail to “generate audio”. Who knows how other SIP stacks will behave? But the more one will try to scale Kamailio, the more significantly this out of order processing issue will become. The solution to this seems very simple and straightforward – put packets to be processed into a queue PER Call-ID, or something along those lines. In short, the parallelism should be by call, not by packet. What say ye? Have I misunderstood something here? Cheers, Jawaid

1 year, 4 months

Database Failure Detection at runtime

by Waqar 40

Hello Everyone, I am using Kamailio sqlops module to write to a remote database which is not the database of Kamailio. It is working fine. But for redundancy purpose, if this database goes down, I want the Kamailio to detect the failure at runtime and write the data to another database (standby database). Is it possible? Can anybody please guide me on this asap? Regards, Vicky

1 year, 4 months

ds_is_from_list not matching dispatcher listed with hostname

by Benoît Panizzon

Hi On our devevelpment system, we have this dispatcher list: 3200 sip:reg1.dev.example.com:5060 0 0 name="Registrar01"; 3200 sip:reg2.dev.example.com:5060 0 0 name="Registrar02"; The names or course are in the DNS: A,AAAA and PTR. ds_is_from_list() returns the groupId 3200 Now I have started building the production system... 3200 sip:reg1.prod.example.com:5060 0 0 name="Registrar01"; 3200 sip:reg2.prod.example.com:5060 0 0 name="Registrar02"; DNS ist set up the same. I have double-checked: Names and IP addresses do resolve as they should. ds_is_from_list() returns nothing. I have also sniffed the connection. The ip addresses in the packets are the ones I expect. modparam("dispatcher", "ds_ping_from", "sip:survivability@sip.example.com") pings the machines and is getting answers. What else could cause this not to match? -- 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 ______________________________________________________

1 year, 4 months

imc sends all messages with Content-Type: text/plain

by Joey Golan

Hello, I'm checking the imc module and it appears that imc sends all messages with hard-coded content type header so if client sends an application/im-iscomposing+xml message, other clients receives the message with content-type text/plain which is very confusing. I think the right behavior is to take the content-type header from the original message and use it in the messages imc sends. Is there a workaround that might help me achieve that?

1 year, 4 months

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sr-users December 2022