sr-users May 2019

sr-users@lists.kamailio.org

84 participants
96 discussions

Sending in-dialog requests from custom module's C code

by Ivan Ribakov

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

4 years, 11 months

GDB debugging Kamailio 5.2.2 IMS authorization failed by the SCSCF

by Woscek, Martin W.

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

4 years, 11 months

http_client_query module?

by Andrew Chen

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.*

4 years, 11 months

Udp errors on High Availability Setup

by Duarte Rocha

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

4 years, 11 months

HELP ME

by khadime gaye

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' >>

4 years, 11 months

implementing custom authentication method

by Walter.Martín Villalba

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.

4 years, 11 months

Kamailio bypassing RTP media

by Ali Taher

Hi everyone, I'm new to kamailio. I plan to setup a sip server cluster, Does someone can give me some suggestions if I can use kamailio as front server, which handle sip message and bypass rtp media message to backendserver, this mean the kamailio handle only sip message, the rtp packets are sent directed to backend server. The sip sequences is 1.softswitch send invite to kamailio 2.kamailio send invite to backend server. 3.backend server return 200 ok to kamailio 4.kamailio return 200 ok to softswitch, the ip and port in sip is from the backend server's msg, this make the softswitch send rtp direct to backend server. 5.rtp packets are transfered between softswitch and backend server. .... 6.backend server send bye to kamailio 7.kamailio send bye to softswitch. Any help is appreciated. Regards, Ali Taher

4 years, 11 months

forcing socket doesn't work for ACK

by David Villasmil

Hello guys, I have public and private IPs, and i need to force the sending socket replying to internal out externals endpoint, so i'm using this: function to check the destination (i tried using $sndto(ip) but it always returns NULL): route[CHECK_DEST_NET] { if ( $du=~"sip:172\..*" ) { setflag(FLAG_TO_PRIVATE); xlog("L_ERR", "[CHECK_SOURCE] Packet going to PRIVATE -> [$du]\n" ); } else { setflag(FLAG_TO_PUBLIC); xlog("L_ERR", "[CHECK_SOURCE] Packet going to PUBLIC -> [$du]\n" ); } return; } on my relay: route(CHECK_DEST_NET); if (isflagset(FLAG_TO_PRIVATE)) { xlog("L_ERR", "[RELAY] forcing socket to PRIVATE NET\n" ); force_send_socket(LISTEN_INSIDE_IF:LISTEN_INSIDE_PORT); } else { xlog("L_ERR", "[RELAY] forcing socket to PUBLIC NET\n" ); force_send_socket(LISTEN_OUTSIDE_IF:LISTEN_OUTSIDE_PORT); } This works nicely, except for ACKs and potentially other packets sent statelessly? Anyone knows how to fix this? Regards, David Villasmil email: david.villasmil.work(a)gmail.com phone: +34669448337

4 years, 11 months

run some extra things before relying message

by Mojtaba

Hello, I have encountered with problem in Kamailio. At first glance it looks simple. Considering the Data Lump feature in Kamailio, All changes in SIP body, does not apply quickly. So if we are using RTPEngine or RTPProxy, How we can get body message (Actually IP and port from SDP after rtpengine_manage function) before relaying message? Suppose i want get some information and run some extra things before relying message? I just added my extra things in t_on_reply block, but it's strange why it doesn't work before relaying! -Mojtaba Esfandiari.S

4 years, 11 months

Problem with topoh

by Phillman25 Kyriacou

Dear List I have an issue with topoh module. Specifically for in-dialog requests, if the encoded uri is altered i.e. initial encoded contact uri is Contact: <sip:X.X.X.X;line=sr-huAWi7oPBYsF.cC0L2lWOUlPwbSWOUl6wURTw24W> and UAS sends an in-dialog INVITE like this adding tgrp and user=phone: INVITE sip:X.X.X.X;line=sr-huAWi7oPBYsF.cC0L2lWOUlPwbSWOUl6wURTw24W;tgrp=1069912311;user=phone Kamailio cant seem to match/decode this and responds "404 Not Found" I have also set: modparam("topoh", "uri_prefix_checks", 0) As specified here: https://www.kamailio.org/docs/modules/4.4.x/modules/topoh.html#idp37582868 But still doesn't work. Is there a bug with this module? # ==================================================== # ================ TOPOLOGY HIDING =================== # ==================================================== modparam("topoh", "mask_key", "secret") modparam("topoh", "mask_ip", "X.X.X.X") modparam("topoh", "mask_callid", 0) modparam("topoh", "uparam_name", "line") modparam("topoh", "uparam_prefix", "sr-") modparam("topoh", "vparam_name", "branch") modparam("topoh", "vparam_prefix", "z9hG4bKsr-") modparam("topoh", "uri_prefix_checks", 0) Thanks in advance for your support Phillip

4 years, 11 months

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sr-users May 2019