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42 participants
37517 discussions

remove header from reply?
by Brett Nemeroff 19 Aug '22

19 Aug '22

Hello, I'm receiving calls which I forward to a server I KNOW will reply with a 302. When I get that 302, I parse some information and then t_reply(302) the originator. The 302 I create needs to have it's own contact header which I am adding with append_to_reply(). That works great. BUT the contact header from the original 302 is hanging around. Now I have two contact headers :( How can I get rid of the original 302's contact header? remove_hf() doesn't work in this context since it's a reply. So I need a kind of "remove_header_from_reply()". Thanks, Brett

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Processing Async HTTP Requests in Real-time
by Brett Nemeroff 19 Aug '22

19 Aug '22

Hello Kamailio Team! I've tried following the documentation for http_async_query() with suspend=1 and not getting results I'm expecting. Perhaps I'm misunderstanding the documentation. Basically I'm performing a http_async_query() with suspend set to 1 and a "route_name" set to HTTP_REPLY. When my query executes, it appears that Kamailio stops processing in that route block, suspends, and then when a reply is available, it continues in HTTP_REPLY. That makes sense. I pull the return value and set some $var and $avp. When I get to the end of the HTTP_REPLY block, I'm EXPECTING it to RESUME FROM the suspended location from the original route block, which it does NOT seem to do. Is that expected? For what it's worth, I did test just continuing my route logic in HTTP_REPLY and just forgetting about the original route block (moved all the remaining processing logic into HTTP_REPLY) However, existing $avp and $vars that were already set within the transaction were not set. So that's not possible either. I'm pretty sure there is a right way to do this without getting hacky. Can someone help me out? And yes, I know what I'm trying to do sounds like sync, but I want async to handle high volume and the potential for my external URL to lightly block. I believe the right way to do this is with async+suspending. Thank you, Brett

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packets exceeding MTU size
by Ali Taher 18 Aug '22

18 Aug '22

Hello all, Lately I faced an issue that Kamailio is not responding to some invite packets coming from SBC. When investigating I found that these packets exceeds MTU size. Could this be the issue? Knowing that in Kamailio configuration I have a condition on is_method("INVITE"). Could be that in case of packet exceeding MTU size it's not considered as invite packet by Kamailio? I have Kamailio 5.2.5. Regards, Ali Taher

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How to enforce max_contacts at registration?
by Benoit Panizzon 18 Aug '22

18 Aug '22

Hi List # ----- registrar params ----- modparam("registrar", "method_filtering", 1) # modparam("registrar", "append_branches", 0) modparam("registrar", "max_contacts", 10) modparam("registrar", "max_expires", 3600) modparam("registrar", "gruu_enabled", 0) modparam("registrar", "retry_after", 30) modparam("registrar", "xavp_cfg", "reg") == snipp == # Handle SIP registrations route[REGISTRAR] { # We are authenticated. # Create an AOR based on the auth_username for the location service. $var(saveuri) = "sip:" + $aU + "@" + $rd; # Set max_contacts limit via registration module reg xavp. if ($avp(debug) > 0) { xlog("L_INFO", "$cfg(route): Setting max_contacts to $avp(max_contacts) for $var(saveuri)\n"); } $xavp(reg=>max_contacts) = $avp(max_contacts); # Save Location! $var(result) = save("location","0x00","$var(saveuri)"); if ($var(result) == -2) { xlog("L_ERR", "$cfg(route): Too many contacts for $var(saveuri)\n"); sl_reply_error(); } if ($var(result) == -1) { xlog("L_ERR", "$cfg(route): Error saving location $var(saveuri)\n"); sl_reply_error(); } if ($var(result) == 1) { xlog("L_INFO", "$cfg(route): Contact $var(saveuri) inserted\n"); } if ($var(result) == 2) { xlog("L_INFO", "$cfg(route): Contact $var(saveuri) updated\n"); } if ($var(result) == 3) { xlog("L_INFO", "$cfg(route): Contact $var(saveuri) deleted\n"); } if ($var(result) == 4) { xlog("L_INFO", "$cfg(route): Contact $var(saveuri) returend\n"); } exit; } == snapp == $avp(max_contacts) is set to 1 Still, multiple registrations are possible for the $aU in question. What am I doing wrong? Mit freundlichen Grüssen -Benoît Panizzon- -- 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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Re: [SR-Users] TLSv1.3 support
by Henning Westerholt 17 Aug '22

17 Aug '22

Hello, Please keep the list in CC. Regarding opening new TLS 1.3 connection, this should work, but did not tested it right now. If not, open an issue on our tracker. Regarding the option to restrict to only TSLv1.3 connection - I have added support for configuring this to git master version in commit 105600b3. Maybe you can give it a try, the patch should probably apply to 5.6.x branch. Cheers, Henning From: Helio <hok.sh10(a)gmail.com> Sent: Wednesday, August 17, 2022 2:52 PM To: Henning Westerholt <hw(a)gilawa.com> Subject: Re: [SR-Users] TLSv1.3 support Regarding the full support, I would like to know if Kamailio can start a TLSv1.3 connection as a client. Another point is if we can restrict to accept only TLS v1.3 and not TLSv1.2 for instance. Thanks, Helio Em ter., 16 de ago. de 2022 às 11:45, Henning Westerholt <hw(a)gilawa.com<mailto:hw@gilawa.com>> escreveu: Hello, not sure about the question about “full support”, maybe you can add details. Kamailio supports connection with TLSv1.3: $ openssl s_client -connect kam04.tst.domain.net:5061<http://kam04.tst.domain.net:5061> -tls1_3 2>&1 | tail -n 10 New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384 Server public key is 4096 bit Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE No ALPN negotiated Early data was not sent Verify return code: 0 (ok) Cheers, Henning From: sr-users <sr-users-bounces(a)lists.kamailio.org<mailto:sr-users-bounces@lists.kamailio.org>> On Behalf Of Helio Sent: Monday, August 15, 2022 8:01 PM To: sr-users(a)lists.kamailio.org<mailto:sr-users@lists.kamailio.org> Subject: [SR-Users] TLSv1.3 support Hello, I noticed that Kamailio has option TLSv1.2+. Does the Kamailio support full TLSv1.3? Or does it have any restrictions? BR,

1 1

Kamailio not responding in heavy load
by Ali Taher 17 Aug '22

17 Aug '22

Hello all, I'm using sqlops module to connect to postgres and get the routing of calls from postgresql database. In order to troubleshoot issues in case they happened, I added each call details to Kamailio log. In some cases, when there is heavy traffic load (around 100 cps), I don't find some calls in Kamailio log, knowing that I can find them on the switch log (switch sending the invite packets to Kamailio). When checking the traces on these calls taken by the switch, it's clear that Kamailio is not responding to the invite packets sent by the switch. It could be because there are no available process to handle the call at this moment (I have set fork=14) Is it possible to check if there are calls pending in the queue? Regards,

2 1

Request rpms for 5.6.1
by Richard Chan 17 Aug '22

17 Aug '22

Hi kamailio team, I'd like to request that 5.6.1 be added to rpm.kamailio.org. Thanks! S-P Chan

3 3

TLSv1.3 support
by Helio 16 Aug '22

16 Aug '22

Hello, I noticed that Kamailio has option TLSv1.2+. Does the Kamailio support full TLSv1.3? Or does it have any restrictions? BR,

2 1

proper way for infinite loop in event_route for evrexec module
by Patrick Karton 16 Aug '22

16 Aug '22

Hello i would like to use the evrexec module to execute background jobs over exec module mainly because i want to be able to trigger that route manually via rpc from time to time. in the documentation its is stated we should use tasks that run forever and except using while loop i dont see another way. and i dont to want to disable max_while_loops. but if i disable it i will get error message like runaway while (1091, 9): more then 100 loops. so is there another way to do it properly ? Thanks.

4 5

Remove and Re add FROM in 200 OK sl reply
by Lewis Hutchinson 16 Aug '22

16 Aug '22

Hello All kamailio 5.5.3 KEMI Python Lab environemnt Is there a reason why this does not work? Lines 2 and 3 work but the removal of the initial From is not working on Line 1 1. KSR.hdr.remove("From") 2. KSR.hdr.append_to_reply("From: " +KSR.pv.gete("$fn") + " <"+KSR.pv.gete("$fu") + ">" + ";tag=" +KSR.pv.gete("$ft") + "--1234" + "\r\n") 3. KSR.sl.sl_send_reply(200, "OK") In a SUBSCRIBE/NOTIFY scenario I am trying to control the From Tag returned in the 200OK so I can use the same one in subsequent NOTIFY messages generated outside of Kamailio, my theory is use the From tag in the Subscribe and append it on the reply with -1234 for example (this is only in a Lab at this stage, any other options please let me know) Whenever I do this I end up with 2 From headers (see below) SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.1.67:5060;branch=z9hG4bK-f710a11a;rport=46404;received=xx.yy.xx.yy From: " testuser" sip:limeant30@sip.viazeta.com;tag=bf8745def06c7b12 To: <sip: testuser(a)sip.viazeta.com>;tag=47969b75f14e6954812863912d1cf21c.b5f3318f Call-ID: b21ba770-9b5836aa(a)192.168.1.67 CSeq: 18137 SUBSCRIBE Contact: "testuser" <sip:testuser@ xx.yy.xx.yy:46404> Expires: 3600 From: "testuser" sip:testuser@testbed.com;tag=bf8745def06c7b12--1234 Content-Length: 0 I have tried many many variations but the original From header always persists I have checked the debug logs and it says it has been removed Anyone know what I am missing? And how to get KSR.hdr.remove("From") to work. Looking in a debug log the header is removed. Lewis

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