January 2013 - sr-users

LCR weight
by Ricardo Martinez 08 Jan '13

08 Jan '13

Hello. I have a doubt about the WEIGHT value in the LCR module. In the past we used the Kamailio version 1.5.2 and in that version LCR weight was calculated by a little script called lcr_weight_script.php. There was not “percent” values like 50% and 50% for two gateways despite that the probabilities were numbers calculated by the script. My question is : For Kamailio version 3.2.4 do I have to use the same script to calculate the weight?? I was almost sure that the weight column was a probability value. For example if I have 3 gateways, with 50% 25% and 25% The weight column should be : 50, 25 and 25 ? or 45, 32 and 32 as the script indicates??? [root@vlcr utils]# ./lcr_weight_test.sh 45 32 32 weight 45 probability 0.5235 weight 32 probability 0.2352 weight 32 probability 0.2413 Please enlighten me here. Thanks Ricardo.-

2 1

TCP Path received quotes
by Spencer Thomason 07 Jan '13

07 Jan '13

Hello, I'm forwarding registrations to Freeswitch and adding a Path header using add_path_received() for endpoints behind NAT. When TCP is used, this results in a header like this: Path: <sip:a.a.a.a:5070;lr;received="sip:b.b.b.b:35430;transport=tcp"> Freeswitch doesn't like the transport protocol inside the quotations and refuses to route a call to the registered user. Constructing the header manually without the quotes such as: append_hf("Path: <sip:$Ri:$Rp;lr;received=sip:$si:$sp;transport=$pr>\r\n"); solves the problem. Is there a reason for the quotes? Best Regards, Spencer

4 7

Multi tenant Kamailio
by Rumen Mihailov 07 Jan '13

07 Jan '13

Hello Kamailio, VoIP and asterisk gurus, I have the following really complicated scenario to solve. I have CompanyA which has extensions 100-120 I have CompanyB which has extensions 100-115 I have CompanyC which has extensions 100-130 Now I want to have all those extensions on a single kamailio box, but I want to achieve the following. CompanyA calls 110 and this rings CompanyA 110 not CompanyB or CompanyC. What I want to achive is multitenancy. I know how to make this in asterisk but I want to take advantage of Kamailio's load balancing and HA features. Sammy from the mailing lists advised that I use multidomain and actually I saw that this module is indeed intended to do that, however I have no clue how to use it. I mean do I have to setup a domain for all the companies ? For instance companya.itradebg.com, companyb.itradebg.com and then advise the customers to register to their respective domain or what ? This concept is really a bit tough for me despite all the help from Sammy for which I am really greatful. I would greatly appreciate any tutorials or links to some useful documentation apart from the module documentation. Thank you in advance guys. Best regards, Rumen http://itradebg.com

2 2

NAT'ed RLS setup
by Dmytro Bogovych 07 Jan '13

07 Jan '13

Greetings. I have kamailio 3.3.3 setup on server behind the nat. Nat forwards ports for tls/tcp/udp. This setup worked without rls ok. I added necessary modules - rls, pua, xcap etc. Updated a config file and db. Client application uploads xcap documents ok; after app sends subscribe request to list address. Rls/pua modules generate subscriptions to entries in list. But dns resolver finds the public ip as target for subscription. The result is: sip packets cannot reach the server - they are sent to public ip of nat machine. I see it in ngrep output. Nat does not route them back. I add the domain name and _sip._udp.domain with internal ip address to /etc/hosts. But kamailio does not use /etc/hosts when dns caching is active. I do not want to loose dns caching. I made an attempt to run without caching but server was not stable. It crashed couple of times - so i stopped these attempts. Is there way to put eternal domain -> ip bindings into dns cache? I want to put bingings to internal ip - hope it will help. Maybe there is another way to handle this problem?

1 0

Timeout for t_uac_dlg per request
by David 07 Jan '13

07 Jan '13

Hello, I am running Kamailio 3.2.x, I am using udp mi to send a t_uac_dlg command, :t_uac_dlg: NOTIFY sip:phone1@proxy.lan . . "From:sip:daemon@proxy.lan To:<sip:phone1@proxy.lan> Contact:sip:daemon@proxy.lan" # I would like to know if I can change the timeout for this request. Running a packet sniffer on the proxy, I see the packet is retransmitted after 500ms, then 1000ms, then 2000ms, etc... This is the proper behaviour for SIP, so we can see my tm module is working well. My problem is that I want a response within 3 seconds ( I know this doesn't respect the normal SIP timer values ). I do not want to change the timers in the tm module for the entire proxy, so my question is if there is a way to set the timeout for the dialog created by the t_uac_dlg command, and can I set it on a per dialog basis ? David

1 0

TLS with self-singned certificates
by Iurii Andamasov 07 Jan '13

07 Jan '13

Hello, trying setup kamailio with TLS, have 2 peers, tls.cfg: http://pastebin.com/DvdDzx0v i'm getting Jan 4 10:38:43 fs-tls /usr/sbin/kamailio[3798]: ERROR: tls [tls_server.c:1190]: TLS read:error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure Can someone point me to solution? Thanks

3 4

tls_domain.h:37: fatal error: openssl/ssl.h: No such file or directory
by Shreyansh Purwar 07 Jan '13

07 Jan '13

Hello Everyone, While building kamailio server 3.0.0 with TLS(I have removed tls from exclude module variable) I am getting following error :- - tls_domain.h:37: fatal error: openssl/ssl.h: No such file or directory Please help me how to resolve this issue. Thanks in anticipation. -- Best Regards Shreyansh Purwar

2 1

Malicious traffic comming from 37.75.210.90
by Nick Khamis 06 Jan '13

06 Jan '13

Hello Osama, and Hisham, At 1330GMT there was some malicious activity coming from your network IP 37.75.210.90. Please act accordingly. Things that may be of use "972599779558" N.

1 0

dialog ka_timer and ka_interval problem
by Rinor Hoxha 06 Jan '13

06 Jan '13

Hi, I had an issue with dialog module of kamailio v3.3.3. Is the same described on http://lists.sip-router.org/pipermail/sr-users/2012-November/075735.html. I think the issue is related to dgl_hash.c on line:192 *dlg_ka_list_head = NULL; should be *dlg_ka_list_tail = NULL; and line:216 *dlg_ka_list_tail = dka; should be *dlg_ka_list_head = dka;. I will test it as soon as I can, but meanwhile I'm attaching the patch that should fix it so you can test it and report back the results if you want to. Br, Rinor

2 1

Kamailio DB version error
by Douglas Ugalde 06 Jan '13

06 Jan '13

Hi, I want to load the "dialplan.so" with parameters but when I reload kamailio, I got this error: /usr/local/sbin/kamailio[1348]: ERROR: <core> [db.c:439]: invalid version 0 for table my_table found, expected 1 (check table structure and table "version") Im using kamailio 3.3.3 Please what can I do to resolve it? Regards.

2 1