sr-users May 2019

sr-users@lists.kamailio.org

84 participants
100 discussions

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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http_client_query module?
by Andrew Chen 08 May '19

08 May '19

Hey guys, Need help here. What module besides tls.so I need to load in order to get http_client_query to work? The module doc says tls.so: #!ifdef WITH_TLS loadmodule "tls.so" #!endif but I keep getting this when doing config check: root@ashmaintpsg51:/etc/kamailio# kamailio -c kamailio.cfg 0(12971) ERROR: <core> [core/modparam.c:152]: set_mod_param_regex(): No module matching <http_client> found 0(12971) CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 322, column 71: Can't set module parameter 0(12971) ERROR: <core> [core/modparam.c:152]: set_mod_param_regex(): No module matching <http_client> found 0(12971) CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 323, column 45: Can't set module parameter 0(12971) ERROR: <core> [core/modparam.c:152]: set_mod_param_regex(): No module matching <http_client> found 0(12971) CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 324, column 42: Can't set module parameter 0(12971) ERROR: <core> [core/modparam.c:152]: set_mod_param_regex(): No module matching <http_client> found 0(12971) CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 325, column 48: Can't set module parameter 0(12971) ERROR: <core> [core/modparam.c:152]: set_mod_param_regex(): No module matching <http_client> found 0(12971) CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 326, column 44: Can't set module parameter 0(12971) ERROR: <core> [core/modparam.c:152]: set_mod_param_regex(): No module matching <http_client> found 0(12971) CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 327, column 71: Can't set module parameter 0(12971) ERROR: <core> [core/modparam.c:152]: set_mod_param_regex(): No module matching <http_client> found 0(12971) CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 328, column 67: Can't set module parameter 0(12971) ERROR: <core> [core/modparam.c:152]: set_mod_param_regex(): No module matching <http_client> found 0(12971) CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 329, column 41: Can't set module parameter 0(12971) ERROR: <core> [core/cfg.y:3309]: yyparse(): cfg. parser: failed to find command http_client_query (params 2) 0(12971) CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 859, column 105: unknown command, missing loadmodule? and I have the package installed on my ubuntu 18.04: ii kamailio-*tls*-modules:amd64 5.1.2-1ubuntu2 amd64 TLS support for the Kamailio SIP server (authentication, transport) thoughts? -- Andy Chen Sr. Telephony Lead Engineer achen@ <achen(a)thinkingphones.com>fuze.com -- *Confidentiality Notice: The information contained in this e-mail and any attachments may be confidential. If you are not an intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this e-mail in error, please notify the sender and permanently delete the e-mail and any attachments immediately. You should not retain, copy or use this e-mail or any attachment for any purpose, nor disclose all or any part of the contents to any other person. Thank you.*

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Udp errors on High Availability Setup
by Duarte Rocha 08 May '19

08 May '19

Greetings, I have two Machines with Kamailio in a High Availability (HA) configuration. Both machines are active and processing calls and both have one HA IP that can jump to the other machine in case of failure. I also have probing for NAPs configured with each IP as the socket. So, in each machine i have this configuration : listen=udp:HA_Address1 listen=udp:HA_Address2 NAP 1 being probed from socket HA_Address1 NAP 1 being probed from socket HA_Address2 I also have /proc/sys/net/ipv4/ip_nonlocal_bind with value 1. Everything works correctly with this configuration. However when the probing is sent for the NAP' my logs get filled with the same error messages. udp_send(): sendto(sock, buf: 0x7f2d4c91fa18, len: 340, 0, dst: (xxx.xxx.xxx.xxx:xxx), tolen: 16) - err: Invalid argument (22) CRITICAL: <core> [core/udp_server.c:602]: udp_send(): invalid sendtoparameters#012one possible reason is the server is bound to localhost and#012attempts to send to the net ERROR: tm [../../core/forward.h:219]: msg_send_buffer(): udp_send failed The error happens because it is trying to probe a NAP using a socket that isn't active at the moment in the machine. Is there a way for this error not to be logged or be disabled without reducing Log Level to suppress CRITICAL errors? I think this is a standard High Availability configuration. Is there some setting that can disable this kind of errors? Best Regards, Duarte Rocha

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HELP ME
by khadime gaye 07 May '19

07 May '19

Good morning, How I can resolve this problem ? << ERROR: Could not load the script in /usr/local/lib64/kamailio//kamctl/kamdbctl.mysql for database engine MYSQL ERROR: database engine not loaded - tried 'MYSQL' >>

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implementing custom authentication method
by Walter.Martín Villalba 03 May '19

03 May '19

Dear list, I'm implementing a custom method for user authentication and would like to kindly ask for some guidance regarding the server side changes that may be needed in order to keep things running smoothly. The idea is to replace the standard user/pass-based digest authentication with a custom one based on Open ID Connect (OIDC) access tokens. I already have some pieces working (receiving access token in REGISTER message, validating the token by calling custom python routine, etc.), but I'm missing the bits needed to keep track of users who have successfully authenticated. While looking at sipcomm.cfg I found calls to *www_authenticate* (defined in modules/auth_db/authorize.c), which in turn calls to *mark_authorized_cred*, *check_auth_hr* (or *auth_check_hdr_md5*), and *generate_avps*,. Some of these functions are indeed changing some values in the DB and/or in memory, and this is where I would like some guidance. Is there any documentation I could look at which hopefully explains what DB values and/or data structures in memory need to be updated in order to keep track of successfully authenticated users? I believe with this last piece I'd be able to wrap up my custom authentication implementation. Thanks in advance! Regards, Walter Martín.

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sr-users May 2019