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37517 discussions

DMQ re-ordering concern
by Julien Chavanton 11 May '19

11 May '19

Yesterday at Kamailio World there was an interesting question, raising a concern about replication of user location and DMQ in general, we should track it in the mailing list and use it as a feature request and I can share my initial thoughts on the topic. The concern was about DMQ reordering transactions. With SIP registration this seems like a minor concern, high responsiveness at the cost of potential small inconsistency seems like a good option. Considering that, the state will automatically correct itself and that this can be controlled using the expiration timer. This will become even more insignificant when the replicas can only be used as primary server failover. (it becomes a very small concern only when the primary server fails) With other type of data re-ordering may result in more problematic use cases. My impression is that DMQ should try to be good only with volatile data, data that will expire anyway, like caching with expiration, registration, Dialogs, etc. I think it may be worth looking at adding support for ordering/queuing in DMQ. Performance and simplicity could be maintained by doing mainly transactions in parallel with a configurable re-ordering best effort to minimize the impact of the problem. For example : 1- trying to re-order for a configurable amount of time. (32 seconds to match the RFC for SIP re-transmissions) 2- adding tractability for failed transactions. 3- the possibility to trigger a re-sync. Another option is to look at preserving strict ordering but I can imagine this could add more problems in some cases ...

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Question regarding NAPTR and RURI
by Schneuwly Mathias RUAG 10 May '19

10 May '19

Hi I've a question about NAPTR lockup and rewriting the RURI. Following a little example: - Alice at location A tries to call Bob at location B - location A uses the RURI naptr.locationB.com to reach location B - this NAPTR resolves to hostb.locationB.com and host B is listening on port 5070 hostb has the following alias defined: - udp:hostb.locationB.com:5070 The problem now is, that the incoming RURI is "sip:bob@naptr.locationB.com" and the check to myself is not True. Is there a possibility to rewrite the RURI to the result of the NAPTR query? If I would add a second alias like "udp:naptr.locationB.com:5070" a check to myself would still fail as the RURI does not contain a port. So I would have to add an alias like "udp:naptr.locationB.com" without port, then it would work.? Is this the way to go? Because the documentation says it is important to include the port, otherwise the loose_route() will not work as expected... Thanks for your replies! Mathias

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Help identifying mem leaks
by Duarte Rocha 10 May '19

10 May '19

Greetings, Recently one of my Kamailio's started started answering with a lot of 500 replies to requests because of insufficient private memory. The service Kamailio had been running for 6 months now. In order to solve this i increased the private memory settings and restarted the Kamailio. Before that, when searching a bit about the issue i found an old thread where Daniel suggested using " kamcmd corex.pkg_summary idx 1" to check for pkg leaks in the sip worker process. I ran this before doing the restart in order to identify leaks and found the summary in the logs. However, i am having a hard time interpreting this summary and being able to know if i have or not a mem leak. What should i be looking for? This is the beggining of the summary : qm_status: (0x7ff3c8cef010): qm_status: heap size= 8388608 qm_status: used= 928576, used+overhead=1464080, free=6924528 qm_status: max used (+overhead)= 1488472 qm_status: dumping all alloc'ed. fragments: qm_status: 0. N address=0x7ff3c8d286d8 frag=0x7ff3c8d286a0 size=1024 used=1 qm_status: alloc'd from core: core/str_hash.h: str_hash_alloc(59) qm_status: start check=f0f0f0f0, end check= c0c0c0c0, abcdefed qm_status: 1. N address=0x7ff3c8d28b40 frag=0x7ff3c8d28b08 size=256 used=1 qm_status: alloc'd from core: core/str_hash.h: str_hash_alloc(59) qm_status: start check=f0f0f0f0, end check= c0c0c0c0, abcdefed qm_status: 2. N address=0x7ff3c8d28ca8 frag=0x7ff3c8d28c70 size=184 used=1 qm_status: alloc'd from core: core/counters.c: cnt_hash_add(332) qm_status: start check=f0f0f0f0, end check= c0c0c0c0, abcdefed Any help? Best Regards, Duarte Rocha

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How to configure Kamailio 5.1 with Asterisk pjsip
by przeqpiciel 10 May '19

10 May '19

Hi, There is any working examples how to configure dispatcher module of Kamailio? I have working registrations but working in half dialing function.Signalling are come to asterisk and rtp start sending to my IP but i cant hear anything. Asterisk are doing registrar job - i dont know if it is good idea, maybe not.

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RTP multiplexing, batching and compression (KamailioWorld followup)
by Stefan Sayer 09 May '19

09 May '19

Hi, as a followup to the 5 min 5 slides talk on Tuesday at the Kamailio world conference, I wanted to send links to that implementation, as I did get some interest about this afterwards. This transparent RTP mux gateway implementation in SEMS is a multiplexing, batching and compression mechanism, which can save quite some bandwidth on low bitrate codecs - can be useful if you need to work with very low bitrate links, e.g. on satellite (I tested with 10 G729 calls instead of 5 on a 128kbit sat link). It's a bit like ROHC (RFC3095) but on application level, only for RTP, and by using configuration for IP addresses instead of negotiation. Or as osmux, but without separate negotiation (but in-band), and for all codecs, and SIP. Or iax2 trunking mode, but with normal SIP/RTP. https://github.com/sems-server/sems/blob/sayer/rtp-mux/doc/rtp_mux/rtp_mux_… https://github.com/sems-server/sems/blob/sayer/rtp-mux/doc/rtp_mux/rtp_mux.… For now it's in the sayer/rtp-mux branch, but it's planned to merge it to master, possibly with simplification of the configuration. On another note, many thanks to the organizers of the Kamailio World conference! It's both really nice to meet, and very useful, and I think as well individually as well as for the community as a whole. Best Regards, Stefan

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CRM / Windows integration
by Mark Boyce 09 May '19

09 May '19

Hi All Does anyone have any pointers for integrating Kamailio with CRMs (Dynamics / Salesforce / Zoho) or native Windows? We’re looking for basic click to dial / screen pop. Thanks Mark -- Mark Boyce Dark Origins Ltd

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RE-invite in case of SIP is Active
by Gaurav Bmotra 09 May '19

09 May '19

HI i m gaurav i have installed kamailio 5.1.x on Ubuntu server 18.4 How can i use Re-invite in kamailio if SIP is active so that call can reconnect in case of network loss plz help -- *Regards:* Gaurav Kumar

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Call reconnect in case of loss network
by Gaurav Bmotra 09 May '19

09 May '19

HI i m gaurav i have installed kamailio 5.1.x on Ubuntu server 18.4 when i call from one to another extension , in case of loss network it disconnect the call or stuck there , how can i make it as re-connection when network loss , and it will try to reconnect for some seconds like 30 sec "Example for callingn skype it reconnectcall in case of lossnetwork " plz help -- *Regards:* Gaurav Kumar

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Sending in-dialog requests from custom module's C code
by Ivan Ribakov 09 May '19

09 May '19

I’m working on a custom Kamailio module where I need to send new-dialog and in-dialog requests on timer (hence I’m being forced to generate new messages from C code). So far I’ve been using modules/tm/tm_load.h defined interface to generate messages and handle callbacks. New dialog messages are sent and processed normally. To do that I’m: 1. Calling set_uac_request() to define request parameters 2. Calling tmb.t_request_outside() to send it outside any existing dialog I was able to send in-dialog requests (or so I thought) in a similar fashion, but I soon realised that responses to those requests were dropped because they couldn’t be matched against any known existing transaction. I’m attaching log messages that I believe support this theory and I’ve also observed UDP retransmissions. tm [t_lookup.c:897]: t_reply_matching(): t_reply_matching: hash 50576 label 0 branch 0 tm [t_lookup.c:990]: t_reply_matching(): no matching transaction exists tm [t_lookup.c:993]: t_reply_matching(): failure to match a transaction tm [t_lookup.c:1088]: t_check_msg(): msg (0x5abcb50) id=1 global id=1 T end=(nil) tm [t_reply.c:2195]: reply_received(): transaction not found - (branch -1) The way I’m currently generating in-dialog requests is very similar to what tmb.t_request_outside() does, the main difference being that I do the dialog setup manually, based on the call-ID, cseq and from/to tags (I’m tracking transaction identifiers separately) and then pass resulting uac_req_t to tmb.t_request_within() - https://gist.github.com/IvanRibakov/3302cb286b1f4b786d109b406f2435a2 <https://gist.github.com/IvanRibakov/3302cb286b1f4b786d109b406f2435a2> Now, the question part - does anyone know what I’m doing wrong/missing? As I mentioned, when looking at the generated message bodies, they look ok to me (left - initial request that started the dialog, right - first in-dialog request), so I’m guessing I’m missing some Kamailio internal steps needed to register new transaction. SIP flow (up to the point when first UDP retransmission happens) I apologise in advance for the bulky question and will be extremely thankful for any guidance. Regards, Ivan

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GDB debugging Kamailio 5.2.2 IMS authorization failed by the SCSCF
by Woscek, Martin W. 08 May '19

08 May '19

Hi, Looking for some advice running the debugger and setting breakpoints in Kamailio modules such as the SCSCF. Example: We were trying to watch the authenticate() function: 714 int authenticate(struct sip_msg* msg, char* _realm, char* str2, int is_proxy_auth) { Our Kamailio 5.2.2 code was compiled and linked from source with the -g option already enabled by default. We also dropped our Workers to 1 from 16 in the scscf.xml file for the SCSCF to limit the thread count and get the following list of threads below: We tried the first cdp threads: 8462, 8463, and 8464 and while we could set a break point at line 714 for the authenticate() function, it didn't actually break there at all. Question: What pid will we use to catch the authenticate() called during an initial registration from a boghe client? Anything special we may be missing, gdb related or Kamailio settings? kamcmd -s /run/kamailio_scscf/kamailio_ctl kamcmd 1.5 Copyright 2006 iptelorg GmbH This is free software with ABSOLUTELY NO WARRANTY. For details type `warranty'. kamcmd> ps 8456 main process - attendant 8457 udp receiver child=0 sock=10.0.20.1:6060 8458 slow timer 8459 timer 8460 secondary timer 8461 ctl handler 8462 cdp worker child=0 8463 cdp receiver peer unknown 8464 cdp_receiver_peer=hss522.irisims.org 8465 cdp_acceptor 8466 cdp_timer 8470 notification_worker 8471 notification_worker 8472 notification_worker 8473 notification_worker 8477 JSONRPCS FIFO 8478 JSONRPCS DATAGRAM Any advice appreciated. Thanks, Martin Woscek

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