- sr-users - kamailio.org

dispatcher not distributing well?
by David Villasmil 17 Mar '25

17 Mar '25

Hello guys, i have a kamilio with a dispatcher list in db like +------------------------------------------------+----------------------------------------------+----------------------------+ | id | setid | destination | flags | priority | attrs | description | register_datetime | +------+-------+---------------------+-------+----------+------------------------------+---------------+---------------------+ | 3239 | 430 | sip:gateway-08:5080 | 0 | 10 | duid=gateway-08;weight=50 | gateway-08 | 2023-03-21 00:19:44 | | 3246 | 430 | sip:gateway-11:5080 | 0 | 10 | duid=gateway-11;weight=50 | gateway-11 | 2023-05-15 23:00:28 | | 3247 | 430 | sip:gateway-12:5080 | 0 | 10 | duid=gateway-12;weight=50 | gateway-12 | 2023-05-15 23:06:57 | | 3249 | 430 | sip:gateway-14:5080 | 0 | 10 | duid=gateway-14;weight=50 | gateway-14 | 2023-05-15 23:24:44 | | 3276 | 430 | sip:gateway-15:5080 | 0 | 10 | duid=gateway-15;weight=50 | gateway-15 | 2024-05-01 19:43:19 | | 3277 | 430 | sip:gateway-16:5080 | 0 | 10 | duid=gateway-16;weight=50 | gateway-16 | 2024-05-01 19:51:16 | | 3278 | 430 | sip:gateway-1:5080 | 0 | 10 | duid=gateway-17;weight=50 | gateway-17 | 2024-05-01 19:58:13 | | 3279 | 430 | sip:gateway-17:5080 | 0 | 10 | duid=gateway-18;weight=50 | gateway-18 | 2024-05-01 20:06:44 | | 3280 | 430 | sip:gateway-3:5080 | 0 | 10 | duid=gateway-19;weight=50 | gateway-19 | 2024-05-01 20:14:50 | | 3281 | 430 | sip:gateway-2:5080 | 0 | 10 | duid=gateway-20;weight=50 | gateway-20 | 2024-05-01 20:23:25 | +------+-------+---------------------+-------+----------+------------------------------+---------------+---------------------+ and i'm dispatching with if(!ds_select_dst("$var(dispatcher_id)", "10")) { xlog("[DISPATCH]: ds_select_dst FAILED!'\n"); send_reply("404", "No destination"); exit; } still kamailio isn't distributing at all but for some reason is favoring high-description gateways: kamctl rpc dlg.list 5 gateway-20:5080;transport=udp" 2 gateway-19:5080;transport=udp" it's forwarding calls mostly to gateway-20, gateway-19, gateway-18, gateway-17... in descending order... Why is kamailio doing that? i'd expected it to distribute to all based on the call load on each gateway. Thanks all! Regards, David Villasmil email: david.villasmil.work(a)gmail.com

3 4

Recommendations for paid work
by Anthony Ford 14 Mar '25

14 Mar '25

Hi Can anyone recommend someone that can help us upgrade our 2 Kamailio servers please. After several failed attempts to do this ourselves, it is time to call in the professionals. 5.6.0-dev to the latest The current set up is 2 servers working in tandem, redis and mysql plus nebula. We do have a test server also attached, that can be used for testing. Thanks Tony

6 5

add_contact_alias modifies only one Contact address
by James Browne 13 Mar '25

13 Mar '25

- https://kamailio.org/docs/modules/5.8.x/modules/nathelper.html#nathelper.f.… This add_contact_alias() function changes only the first Contact address in a REGISTER request, even though it's normal (RFC3261, 10.2) for a REGISTER to have multiple Contact addresses. This seems to me to be a kamailio bug. For example, a user might remove one binding while adding a second, in a REGISTER request. If kamailio relays this while adding an alias to only the expires=0 binding, then the new binding may be stored incorrectly in the registrar. James

2 4

Server selecting TCP transport
by Jon Bonilla (Manwe) 13 Mar '25

13 Mar '25

Hi all Using 5.8.4 I have a trunk with a permanent registration created by rpc in the location table. It looks like this: kamcmd> ul.lookup location sbc.mydomain.com { AoR: sbc.mydomain.com Contacts: { Contact: { Address: sip:xxx@sbc.mydomain.com Expires: -102739 Q: 1 Call-ID: dfjrewr12386fd6-343(a)kamailio.rpc CSeq: 1 User-Agent: kamailio SIP Router - RPC Server Received: [not set] Path: <sip:192.168.255.202:5060;lr> State: CS_SYNC Flags: 0 CFlags: 0 Socket: [not set] Methods: 0 Ruid: ulcx-67c9e2ff-19f8-1 Instance: [not set] Reg-Id: 0 Server-Id: 0 Tcpconn-Id: -1 Keepalive: 0 Last-Keepalive: 1741899218 KA-Roundtrip: 0 Last-Modified: 0 } } } In this situation the proxy sends the request to 192.168.255.202 which is a kamailio load balancer which is responsible for sending the call to the customer. The problem is that kamailio, when relaying this request, first performs TCP srv lookup and tries to send the request via TCP. There's no transport=tcp in the address. The lb's dns settings are: dns_try_ipv6=no dns_retr_time=1 dns_retr_no=1 dns_use_search_list=no use_dns_cache=on use_dns_failover=on dns_srv_lb=on dns_try_naptr=no dns_sctp_pref=1 dns_tcp_pref=1 dns_tls_pref=1 dns_udp_pref=1 Seems like this kamailio tries TCP SRV first, and then TLS and then UDP if the previous doesn't bring results. But no NAPTR is enabled. I don't know why it will choose TCP over UDP in this case. -- PekePBX, the multitenant PBX solution https://pekepbx.com

1 0

SDP Truncation When Relaying from WebSocket to UDP – Expected Behavior?
by Pavan Kumar 13 Mar '25

13 Mar '25

Hello Kamailio Community, I recently encountered an interesting behavior when using Kamailio to relay SIP messages from a WebSocket client to FreeSWITCH over UDP. *Observed Behavior:* - The WebSocket client sends an *INVITE* with a large SDP. - Kamailio forwards this request over UDP to FreeSWITCH. - Upon inspection, the *SDP in the relayed message appears truncated*. (Probably MTU limit) - *Surprisingly, the call still establishes successfully*, and there are no noticeable issues with audio or call setup. *My Questions:* 1. *Is this expected behavior?* Should Kamailio automatically truncate SDP when relaying from WebSocket to UDP? 2. *Could this be working accidentally?* For example, is FreeSWITCH handling the partial SDP gracefully by default? 3. *Should I be concerned about potential failures in different scenarios?* (e.g., ICE candidate loss, missing codec negotiation) I would appreciate any insights from the community on whether this is a known or expected behavior in Kamailio, or if it might be a configuration issue. Thanks in advance for your help! Best regards, Pavan Kumar

4 5

Need help using Kamailio IMS and Open5GS for 5G core
by Pete Kay 13 Mar '25

13 Mar '25

Hi I am able to compile Kamailio IMS and Open5GS. The instruction in https://open5gs.org/open5gs/docs/tutorial/02-VoLTE-setup/ is for 4G using Diameter. For 5G, we need to use HTTP protocol. Does anyone know if there is any guide on how to configure Kamailio IMS and Open5GS on 5G core using HTTP protocol for PCRF ? Thanks for millions for all your help. Pete

2 1

Re: upgrading process
by Anthony Ford 12 Mar '25

12 Mar '25

Thanks Ben Really appreciate your response Tony From: Ben Kaufman via sr-users <sr-users(a)lists.kamailio.org> Reply to: "Kamailio (SER) - Users Mailing List" <sr-users(a)lists.kamailio.org> Date: Wednesday, 12 March 2025 at 16:20 To: "sr-users(a)lists.kamailio.org" <sr-users(a)lists.kamailio.org> Cc: Ben Kaufman <bkaufman(a)bcmone.com> Subject: [SR-Users] Re: upgrading process Luckily there usually aren't a lot of breaking changes in Kamailio updates, and config files are mostly back compatible. That doesn't mean that there are never changes, but it does mean that the number of issues to resolve is usually small. * wanted to know if I can run make install on every iteration i.e. 5.6.1, the 5.6.2 etc There shouldn't really be any changes needed to config for the patch/fix versions like that (third decimal place) so those should be fine (and is good practice if you're not able to quickly update to a supported version for any reason), but it shouldn't be necessary to touch every incremental version to upgrade Kamailio. Every major release has an upgrade guide from the pervious version, so in your case: * 5.6 to 5.7: https://www.kamailio.org/wikidocs/install/upgrade/5.6.x-to-5.7.0/ * 5.7 to 5.8: https://www.kamailio.org/wikidocs/install/upgrade/5.7.x-to-5.8.0/ * 5.8 to 6.0: https://www.kamailio.org/wikidocs/install/upgrade/5.8.x-to-6.0.0/ It still shouldn't be necessary to touch each individual version while upgrading. I'd recommend reading through these docs in order taking note of the following: * Look for potentially breaking changes in the core. I don't see any in those documents, but a good example would be if upgrading from 4.x to 5.x how fifo was deprecated. * Look for modules changes. Mostly you'll see things like new features which shouldn't be breaking. A few modules were deprecated/archived in 5.8 ( app_sqlang, and auth_identity). Sometimes modules have small breaking changes in them as well, for example in 6.0 the dialog module dropped support for the dlg_flag parameter. Check your kamailio configs to see if any of these listed changes will impact you. * Follow any DB upgrade changes. These are usually simple changes - things like adding an index to a column, or changing a varchar(n) datatype to be varchar(n+y) which won't break your existing config. Another reply correctly points out that you should watch for changes to the version table. This is possibly a situation where a conflict could arise: The version required for one table might be 1 in 5.6 and 2 in 6.0. It might be worth while to copy the existing version table to a new table (like version_60 for example), and use kamailio's version_table parameter to use the new version table on the updated config. (note: The upgrade guides don't show any table version changes, so you probably don't need to do this). Finally, as a recommendation, smoke test your config in docker. You might not have the container setup in a way to actually receive SIP messages, but "does the config file load correctly" is a nice thing to have resolved ahead of time. * Regards, Kaufman ________________________________ From: Anthony Ford via sr-users <sr-users(a)lists.kamailio.org> Sent: Wednesday, March 12, 2025 9:30 AM To: sr-users(a)lists.kamailio.org <sr-users(a)lists.kamailio.org> Cc: Anthony Ford <tony.ford(a)apalo.co.uk> Subject: [SR-Users] upgrading process CAUTION: This email originated from outside the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi I need some help please. I am very inexperienced with Kamailio, and am trying to work out how to upgrade without rewriting any of the current config. I am going from 5.6.0 to 6.0.0 and wanted to know if I can run make install on every iteration i.e. 5.6.1, the 5.6.2 etc. until I need to make a bigger step, and may have to change tables etc. In the document for upgrading 5.6.x to 5.7.x it says make change to Watch table, but I have no watch table. Very confused. Thanks Tony

1 0

CANCEL suspension and forking
by Alex Balashov 12 Mar '25

12 Mar '25

Hi, When a CANCEL is received and matches a known INVITE transaction, it is forked to all existing branches of that INVITE transaction, at least with these settings: modparam("tm", "cancel_b_method", 2) modparam("tm", "failure_reply_mode", 3) I have a mobile endpoint that is slow to be pushed awake and reregister, tsilo-style, and by the time it finally appears on the scene, the underlying INVITE transaction has been terminated. Accordingly, that endpoint receives no CANCEL. You might ask why that's a problem, if it also didn't receive a forked INVITE. The problem is that Apple's CallKit requires interactive presentation of VoIP APNS notifications as though they are "calls", leading to the phenomenon of what might be called "ghost calls" extrinsically to the actual mobile application. Anyway, I am aware of numerous possible solutions to this problem in principle; most involve sending an out-of-band SIP message to signify an alternative cancellation of the call. However, wonder if I am missing some best-practical approach, perhaps through an overlooked TM facility, or some way of keeping the transaction alive longer than the CANCEL from the UAC would ordinarily require? I don't see how that would work, but thought better to ask. Thanks! -- Alex -- Alex Balashov Principal Consultant Evariste Systems LLC Web: https://evaristesys.com Tel: +1-706-510-6800

3 4

upgrading process
by Anthony Ford 12 Mar '25

12 Mar '25

Hi I need some help please. I am very inexperienced with Kamailio, and am trying to work out how to upgrade without rewriting any of the current config. I am going from 5.6.0 to 6.0.0 and wanted to know if I can run make install on every iteration i.e. 5.6.1, the 5.6.2 etc. until I need to make a bigger step, and may have to change tables etc. In the document for upgrading 5.6.x to 5.7.x it says make change to Watch table, but I have no watch table. Very confused. Thanks Tony

3 3

Set TTL for skipped NAPTR record due to all IPs are unreachable
by Mathias Schneuwly 11 Mar '25

11 Mar '25

Hi I've a question regarding skipped NAPTR records. In our setup, we are using quite big DNS TTLs (860400). If there is an issue on the target server, the NAPTR record is marked as skipped "Mark to skip _sips._tcp.... NAPTR record due to all IPs are unreachable" until the TTL is expired. Since our TTLs are so big, the destination is no longer reachable during this time, even if the server is reachable again. I've seen that I can set "dns_cache_max_ttl" to reduce the time, but this is of course for all cached DNS records. Is there a way to set how long a NAPTR record is skipped or disable the feature at all? Or maybe skip the NAPTR only for the current dialog or transaction? Thanks for your help Best regards Mathias

2 7

Kamailio v6.0.1 Released
by Daniel-Constantin Mierla 10 Mar '25

10 Mar '25

Hello, Kamailio SIP Server v6.0.1 stable release is out. This is a maintenance release of the latest stable branch, 6.0, that includes fixes since the release of v6.0.1. There is no change to database schema or configuration language structure that you have to do on previous installations of v6.0.x. Deployments running previous v6.0.x versions are strongly recommended to be upgraded to v6.0.1. For more details about version 6.0.1 (including links and guidelines to download the tarball or from GIT repository), visit: * https://www.kamailio.org/w/2025/03/kamailio-v6-0-1-released/ RPM, Debian/Ubuntu packages will be available soon as well. Many thanks to all contributing and using Kamailio! Cheers, Daniel -- Daniel-Constantin Mierla (@ asipto.com) twitter.com/miconda -- linkedin.com/in/miconda Kamailio Consultancy, Training and Development Services -- asipto.com Kamailio Advanced Training, March 24-28, 2025 -- asipto.com Kamailio World Conference, May 12-13, 2025, Berlin -- kamailioworld.com

1 0

Releasing v6.0.1
by Daniel-Constantin Mierla 10 Mar '25

10 Mar '25

Hello, I am considering to release Kamailio v6.0.1 (out of branch 60) on Monday, March 10, 2025. If anyone is aware of issues not yet on the bug tracker, report them there asap in order to have a better chance to be fixed. Cheers, Daniel -- Daniel-Constantin Mierla (@ asipto.com) twitter.com/miconda -- linkedin.com/in/miconda Kamailio Consultancy, Training and Development Services -- asipto.com Kamailio Advanced Training, March 24-28, 2025 -- asipto.com Kamailio World Conference, May 12-13, 2025, Berlin -- kamailioworld.com

1 1

Kamailio with Presence Module and Publishing by Asterisk
by Ludovic GRANGE 05 Mar '25

05 Mar '25

Hi, I'm having a problem managing the presence between Kamailio and Asterisk. I have configured Kamailio as a presence server. Asterisk sends presence information via publishing sip request. My softphone which uses Kamailio as a presence server and as a proxy has 2 BLFs configured. On a first call, the presence status is displayed on the 2 keys. But for the 2nd call, only the extension receiving the call has its status changed on the BLF. Via sngrep, the Publishing requests arrive on Kamailio but the DB is not updated because the e-tag does not match. If I wait until the end of the expiry period (60s for the test), the DB is flushed and the 1st call works again. Could you please help me? Thank you Translated with DeepL.com (free version) -- Bien cordialement, Bande verticale Prosoluce Ludovic Grange Administrateur systèmes & réseaux Picto mailludovic.grange(a)prosoluce.fr <mailto:ludovic.grange@prosoluce.fr> Picto tél 05 31 61 62 25 <tel:+33531616225> Picto webwww.prosoluce.fr <https://www.prosoluce.fr> Logo Prosoluce

3 5

Best practices for proxy protocol and TLS offloading
by Alex Balashov 04 Mar '25

04 Mar '25

Hello, I am converting a Kamailio WSS/TLS gateway to pure TCP, with an external HAProxy handling TLS termination and emitting the proxied connection as plain TCP. I am using the PROXYv2 protocol, with `tcp_accept_haproxy=yes`, to convey the upstream network and transport-layer reachability info into Kamailio. I am trying to figure out best practices for mapping the contacts on those connections to the proxied connections themselves. For registrations, tcp_force_alias() (with `tcp_accept_aliases=yes`) works well, and inbound calls go to the right place. However, I'm not quite sure what to do with other flows, such as, for example, in-dialog requests on inbound calls going to the TLS endpoints. There are obviously a lot of possibilities, all or most of which I've tinkered with. These generally involve either {s.replace}-ing `;transport=tls` with `;transport=tcp` in the contacts received from the client, or using the traditional `nathelper` contact alias / RURI alias bag of tricks. However, I don't like the former solution because it leads to a non-compliant R-URI going to the endpoint (it's not the ;transport it sent in its contact), and I don't like the latter because it seems like there are too many moving parts. When tcp_force_alias() works so well for registrations, there must be some small linchpin I'm missing for normal request-reply flows. What is it? Thanks in advance! -- Alex -- Alex Balashov Principal Consultant Evariste Systems LLC Web: https://evaristesys.com Tel: +1-706-510-6800

2 4

Topos Module Questions
by David Tek 04 Mar '25

04 Mar '25

Hello, I am trying to configure the Topos module and have some questions. # topos:msg-outgoing vs topos:msg-sending https://www.kamailio.org/docs/modules/5.8.x/modules/topos.html#topos.e.msg_… I am trying to understand the difference between these two event routes(beyond the content of the SIP message ). I notice that both are invoked when OPTIONS are generated by the local Kamailio server but only msg-sending is invoked for messages transiting the Kamailio( ie proxied, not locally generated). Is there some difference in how these event_routers are invoked beyond the content of the SIP message? # tops -> requests/replies When I am in event_route[topos:msg-sending] { and invoke 'drop', does this apply to the current message or does it apply to the transaction? I have a Kamailio node with devices on either side. Let's call side A untrusted and side B trusted. I want TOPOS happening against the untrusted device but not the trusted device. I have found that when I invoke 'drop' on a request coming from A to B, it disables TOPOS not only on that packet, but also the reply comes from B back to A, TOPOS isn't applied when the reply exits Kamailio towards A. So if I call 'drop' on the request coming from A to B, the reply coming from B to A has no TOPOS applied. How do I get TOPOS applied to all traffic facing a particular device while leaving that traffic un-stripped when the same traffic is interacting with other devices that are trusted? Thanks, David

2 2

Torso Sex Toy for Men & Women
by feifeiwangf＠uusextoy.com 04 Mar '25

04 Mar '25

The sex doll torso is a very light mini sex doll. Usually, its weight is 4kg to 20kg. These sex doll torsos are made of TPE or silicone. Of course, they are all very safe materials. https://www.sextorso.com/

3 2

SHA-256 HASH
by Social Boh 04 Mar '25

04 Mar '25

Hello list, is it possible create a user using sha-256 hash? My goal is Asterisk PBX Register ----- sha-256 digest authentication -> Kamailio Regards -- --- I'm SoCIaL, MayBe

2 3

KEMI logging function name output
by Dmitry Sytchev 28 Feb '25

28 Feb '25

Hi all! By default logging from KEMI with KSR.log() is prefixed with something like this: <core> [core/kemi.c:152]: sr_kemi_core_log(): Can we somehow disable this not to print it every time with every message? Thanks! [image: image.png] -- Best regards, Dmitry Sytchev

2 2

SNMP thresholds
by Sergio Charrua 27 Feb '25

27 Feb '25

Hi all! we have set SNMP stats on our production server. The server is only receiving 1% of the calls, less than 1 CAPS, but we are receiving some SNMP alarms that are a bit weird to us. [image: image.png] This is an example. As we were unsure about the thresholds to be set for Msg Queue, we set Minor to 20 and Major to 100, which resulted in some alarms when we exceeded the Major threshold. From our understanding, the Max Major MSG Queue threshold was 2176, which obviously generated an alarm. But we can't understand why when a Msg Queue depth of 1280 generated an Minor Threshold alarm when the threshold is 20!! Why not generate a Major Threshold alarm instead, as it did reach the Major Threshold ? Also, does anyone have a clue on how to estimate Major and Minor thresholds? How does this Msg Queue handler work? Is it Kamailio's level or on OS/Kernel level that it gets the statistics from? Apart from the official Kamailio SNMPStats docs, any doc or article one would share? greatly appreciated. ( I so much hate SNMP!!! :) ) Atenciosamente / Kind Regards / Cordialement / Un saludo, *Sérgio Charrua*

1 0

Tweaking TCP/TLS connection timers
by Ihor Olkhovskyi 27 Feb '25

27 Feb '25

Hello, I'm observing a bit strange behavoir of Kamailio, but maybe I'm wrong in my assumptions. In some cases Kamailio just closes absolutely valid TCP connection, as I see it in Wireshark [image: image.png] At the same time I do see in Kamailio logs a lots of lines with tcp_timer_check_connections(): message processing timeout on connection id: XXXXX (state: 0) - closing I see that many TCP connections are closing (and it's ok as we have mobile devices connected and loosing connections for them is ok) But for me this connection is perfectly ok looking on TCP keepalives, what can cause this behavoir? I have these TCP options tcp_connect_timeout=30 tcp_conn_wq_max=63536 tcp_crlf_ping=yes tcp_delayed_ack=yes tcp_fd_cache=yes tcp_keepalive=yes tcp_keepcnt=3 tcp_keepidle=30 tcp_keepintvl=10 tcp_linger2=30 Kamailio 5.8.3 Any hints are appreciated. -- Best regards, Ihor (Igor)

2 2

Kamailio and TLS-PSK Support
by Юрій Пивоваров 27 Feb '25

27 Feb '25

Dear Kamailio Community, I am currently exploring the possibility of configuring Kamailio to use TLS-PSK (Pre-Shared Key) for secure SIP signaling. Has anyone successfully configured Kamailio to work with TLS-PSK? If so, could you share any guidance, configuration examples, or relevant modules that need to be adjusted? In this setup, the SIP client will be a device with very limited resources, making it impossible to use certificates. This is why I am specifically looking into a TLS-PSK solution. I have also tried configuring stunnel as a proxy and set listen = tcp:127.0.0.1:5061 in kamailio config, but I haven't been able to get it working. Any suggestions on what might be missing or misconfigured? Thank you in advance for your help!

1 0

Drop RTP Flow and move to another point
by Social Boh 26 Feb '25

26 Feb '25

Hello List, before spending much time on solving this scenario, I'd like to know if this kind of operation can be done using some Kamailio function (maybe dlg_req_within?) or other method. The scenario is: a B2B-1 server call two different destinations, one is a SIP trunk and another is another B2B-2. Both calls go through Kamailio which uses RTPEngine for the media flow. The idea is to drop the first B2B from RTP Flow (leave for signaling) when both calls are answered and leave everything to Kamailio-RTPEngine, like: LegA: Kamailio-RTPEngine -> B2B-2 LegB: Kamailio-RTPEngine -> SIP trunk Thank you in Advance Regards --- I'm SoCIaL, MayBe

1 1

PRACK Retransmission and 408 Timeout Issue in Kamailio
by 高秉寬 26 Feb '25

26 Feb '25

Dear Kamailio Developers, I am using Kamailio as a SIP server to facilitate a phone call, but I am encountering an issue where the call cannot be established due to Kamailio sending a 408 Request Timeout to the caller. Issue Details: - A (Caller) sends an initial INVITE to Kamailio, which then forwards it to B (Callee). The INVITE contains the following Supported header: Supported: timer,100rel,replaces,precondition,from-change,histinfo,tdialog I suspect the *precondition* option may be relevant to the issue. - *B* responds with a *183 Session Progress* message, which includes: Require: 100rel,precondition Kamailio correctly forwards this response to *A.* - *A* then sends a *PRACK* request to Kamailio. However, this request contains: Require: sec-agree Supported: timer Notably, *precondition* is absent from both the *Require* and *Supported* headers. - Kamailio forwards this *PRACK* to *B*, and *B* responds with *200 OK*, including: Supported: 100rel,from-change,tdialog - However, Kamailio does not seem to acknowledge *B's 200 OK* and instead *keeps retransmitting the PRACK* to *B*. B responds with *200 OK* again, but the cycle repeats. - After three retransmissions of *PRACK*, Kamailio eventually sends *408 Request Timeout* to *A*, leading *A* to send a *CANCEL* request. Device Used: - *Caller (A):* Asus ROG Phone 5 - *Callee (B):* Asus ROG Phone 6 Both are commercially available mobile phones. Possible Cause: According to *3GPP TS 24.229, Subclause 5.1.3.1*, If the received response with an SDP body includes a Require header with > the "precondition" option-tag, the originating UE shall include a Require > header with the "precondition" option-tag in responses with an SDP body to > subsequent requests that include an SDP body and include the "precondition" > option-tag in either the Supported or Require header field received > in-dialog. In this case: - The *183 Session Progress* from *B* contains Require: *precondition*. - The subsequent *PRACK* from *A* does not include *precondition* in either *Require* or *Supported*. Could this mismatch be the reason Kamailio keeps retransmitting *PRACK* and ignoring *B's 200 OK*? Or could there be another factor causing Kamailio to behave this way? If additional details are needed, please let me know. Best regards, Ping Kuan Kao

3 4

Issue with registrations
by Anthony Ford 26 Feb '25

26 Feb '25

Hi Version = 5.6.0-dev0 We are seeking help to resolve an issue with registering devices to 3CX (All 3CX servers, have tried 8 different ones) . all the auth info including passwords etc are identical on the 3cx servers. We use Kamailio to register mobile sim cards to 3rd party sip servers i.e. 3CX. We send the normal Username, server addresses and auth details but are experiencing failures with 3CX rejecting the registration and return Proxy Auth failure 407. We have noticed in the pcaps from both sides that the expire value is changing from 180 as an example to 0. As an example In the uac reg_dump the values are : l_uuid: +447529135850<tel:+447529135850> l_username: +447529135850<tel:+447529135850> l_domain: sbc-mt.asim.apalo.io<http://sbc-mt.asim.apalo.io/>;transport=udp r_username: 1001 r_domain: egte.3cx.uk<http://egte.3cx.uk/> realm: <null string> auth_username: FdlHDC1IvA auth_password: extracted auth_ha1: none auth_proxy: sip:egte.3cx.uk:5060 expires: 60 flags: 0 diff_expires: -1738853736 timer_expires: 0 reg_init: 1738850836 reg_delay: 0 contact_addr: k01.asim.apalo.io<http://k01.asim.apalo.io/>;transport=tcp socket: <null string> [cid:image001.png@01DB86AB.2701F190] [cid:image002.png@01DB86AB.2701F190] [cid:image003.png@01DB86AB.2701F190] Looking forward to hearing from you. Many thanks Tony Ford

3 3

REG_MAR_REPLY never get executed
by stinktohighheaven＠gmail.com 26 Feb '25

26 Feb '25

Using Kamailio v5.3, based on the example for scscf found here: https://github.com/kamailio/kamailio/blob/master/misc/examples/ims/scscf/ka… after calling ims_www_challenge("REG_MAR_REPLY", "$var(realm)", "$var(alg)"); the control never goes to REG_MAR_REPLY route block, but it goes to the start of the requet_route block. here is the kamailio.cfg script: request_route { ....... /* Handle Registrations */ if (is_method("REGISTER")) { route(REGISTER); exit; } ...... } /** * Handling of REGISTER requests */ route[REGISTER] { ...... #!ifdef WITH_AUTH if (!ims_www_authenticate("$var(realm)")) { #!else if ($var(alg) == "3GPP-Digest" && !ims_www_authenticate("$var(realm)")) { #!endif if ($? == -2) { send_reply("403", "Authentication Failed"); exit; } else if ($? == -3) { send_reply("400", "Bad Request"); exit; } else if ($? == -9) { xdbg("Authentication re-sync requested\n"); ims_www_resync_auth("REGISTER_RESYNC_REPLY", "$var(realm)"); exit; } else { /* user has not been authenticated. Lets send a challenge via 401 Unauthorized */ xdbg("About to challenge! auth_ims\n"); ims_www_challenge("REG_MAR_REPLY", "$var(realm)", "$var(alg)"); exit; } } else { xdbg("Auth succeeded\n"); /* We need to check if this user is registered or not */ if (!impu_registered("location")) { save("PRE_REGISTER_SAR_REPLY", "location"); exit; } else { isc_match_filter_reg("1", "location"); save("REGISTER_SAR_REPLY", "location"); exit; } } } } /** * Handling of REGISTER MAR replies */ route[REG_MAR_REPLY] { xlog("L_DBG","maa_return code is $avp(s:maa_return_code)\n"); /* this is async so to know status we have to check the reply avp */ switch ($avp(s:maa_return_code)) { case 1: /* success */ xdbg("MAR success - 401/407 response sent from module\n"); break; case -1: /* failure */ xerr("MAR failure - error response sent from module\n"); break; case -2: /* error */ xerr("MAR error - sending error response now\n"); send_reply("503", "MAR failed"); break; default: xerr("Unknown return code from MAR, value is [$avp(s:maa_return_code)]\n"); send_reply("503", "Unknown response code from MAR"); break; } exit; } and here's the log: 12(18) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/usr/local/etc/kamailio/kamailio.cfg] l=757 a=27 n=ims_www_challenge 12(18) DEBUG: ims_auth [authorize.c:293]: challenge(): Looking for route block [REG_MAR_REPLY] 12(18) INFO: ims_auth [cxdx_mar.c:79]: create_return_code(): created AVP successfully : [maa_return_code] - [-2] 12(18) DEBUG: ims_auth [authorize.c:317]: challenge(): Need to challenge for realm [ims.mnc071.mcc432.3gppnetwork.org] 12(18) DEBUG: ims_auth [authorize.c:324]: challenge(): Checking if REGISTER is authorized for realm [ims.mnc071.mcc432.3gppnetwork.org]... 12(18) DEBUG: ims_auth [authorize.c:1449]: get_auth_userdata(): Searching auth_userdata for IMPU sip:432710000010044@ims.mnc071.mcc432.3gppnetwork.org (Hash 425) 12(18) DEBUG: ims_auth [authorize.c:460]: challenge(): Suspending SIP TM transaction 12(18) DEBUG: ims_auth [authorize.c:1529]: multimedia_auth_request(): Sending MAR 12(18) DEBUG: ims_auth [cxdx_mar.c:574]: cxdx_send_mar(): Successfully sent async diameter 70(76) INFO: ims_auth [cxdx_avp.c:137]: cxdx_get_avp(): cxdx_get_experimental_result_code: Failed finding avp (avp_code = 297, vendor_id = 0) 70(76) DEBUG: ims_auth [authorize.c:1303]: new_auth_vector(): new auth-vector with ck [d2deb48b5b3b614ba9112396e3c036fe] with status 0 70(76) DEBUG: ims_auth [authorize.c:1560]: pack_challenge(): setting QOP str used is [, qop="auth"] 70(76) DEBUG: ims_auth [authorize.c:1562]: pack_challenge(): QOP str used is [, qop="auth"] 70(76) DEBUG: ims_auth [authorize.c:1449]: get_auth_userdata(): Searching auth_userdata for IMPU sip:432710000010044@ims.mnc071.mcc432.3gppnetwork.org (Hash 425) 70(76) DEBUG: ims_auth [authorize.c:1458]: get_auth_userdata(): Found auth_userdata 70(76) DEBUG: ims_auth [authorize.c:1682]: add_auth_vector(): Adding auth_vector (status 1) for IMPU sip:432710000010044@ims.mnc071.mcc432.3gppnetwork.org / IMPI 432710000010044(a)ims.mnc071.mcc432.3gppnetwork.org (Hash 425) 70(76) DEBUG: ims_auth [cxdx_mar.c:486]: async_cdp_callback(): DBG:UAR Async CDP callback: ... Done resuming transaction 70(76) INFO: ims_auth [cxdx_mar.c:79]: create_return_code(): created AVP successfully : [maa_return_code] - [1] 70(76) ERROR: tm [t_suspend.c:197]: t_continue_helper(): active transaction not found 70(76) DEBUG: ims_auth [cxdx_mar.c:87]: free_saved_transaction_data(): Freeing saved transaction data: async 11(17) ERROR: *** cfgtrace:request_route=[DEFAULT_ROUTE] c=[/usr/local/etc/kamailio/kamailio.cfg] l=380 a=5 n=route

4 8

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

sr-users