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37511 discussions

handle_tcpconn_ev(): connect failed
by Donat Zenichev 07 Sep '17

07 Sep '17

Hi. Recently I've come across with TCP connection problem. The topology is as following: DNS srv load balancer - two kamailio proxy servers - one routing server. Client appeals to NAPTR record like: sip.domain.com So dns returns one of the proxy servers to client (depending on weight/priority). Now both kamailio have the same priority and weight (the goal is load balancing). Routing server (now it is asterisk) working with chan_pjsip.so, that supports NAPTR/SRV records. He is able to resolve Record-Route / Route headers with value - sip.domain.com (that proxy servers add to record-route headers while relaying requests to him). This topology is done to support present dialogs, even if proxy that recently processed it, is dead. But the problem comes, when routing server (asterisk) sends in-dialog requests to the proxy, that wasn't used to establish the dialog. Example, routing server obtains 200 OK from endpoint (relayed by kamailio1 to him) and he sends back ACK, but not to the kamailio1, he sends it to kamailio2 (because he resolves NAPTR sip.domain.com and gets ip of second kamailio). Kamailio2 processes the request as usual, because both kamailio have the same db for dialog module, but when he tries to relay the request to endpoint, he gots the error: ERROR: <core> [tcp_main.c:4070]: handle_tcpconn_ev(): connect XXX.XXX.XXX.XXX:52185 failed The port that kamailio2 tries to use to relay the ACK, is port that endpoint used to establish the dialog with kamailio1 and actually his TCP connection is now established with kamailio1. So kamailio2 tries to use the same port and gets the error. And this is proper behavior I think. There is no problem with UDP transport. Has anyone seen the similar problem? That indeed is not a problem, but proper behavior. -- -- BR, Donat Zenichev Wnet VoIP team Tel: +380(44) 5-900-808 http://wnet.ua

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cr failure routes
by Nelson Migliaro 07 Sep '17

07 Sep '17

Hello, I am using carrierroute in Kamailio (great module btw). All calls go the same gateway (rewrite_host). I am routing over differents vendor using a prefix. Prefix: 21 dnis: 999999999 $rU after rewrite_host is 21999999999 My problem is when trying to use a failure route, next domain use a different prefix but the host. So I get the: Candidate destination <gateway> was previously used Is there a flag or something to prevent this verification ? Thank you Nelson.-

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How can client get registered users list from Kamailio server or server may broadcast this actively?
by Jack Wang 07 Sep '17

07 Sep '17

Hey guys, As indicated by the title, is there any module providing the related function? My server version is 4.2. Thanks. :)

2 1

Cost deduction in kamailio
by Logeshwaran G 07 Sep '17

07 Sep '17

Hi, How to deduct the call cost or credits for the subscribers with the cnxcc module? Input Please Thanks & Kind Regards, Logeshwaran G

3 15

Query in LCR
by Logeshwaran G 07 Sep '17

07 Sep '17

Hi, I am handling Two Different Account holders and Two Different Gateways with the different lcr_ids: id :1 lcr_id:1 gw_name:car1 ip_addr : 1.2.3.4 id :2 lcr_id:2 gw_name:car2 ip_addr : 1.2.5.3 In kamailio config file I am using load_gws(1), Here Comes my doubt, I need to Pass the lcr_id value inside the load_gws(lcr_id) Dynamically, Is it Possible , Please Guide me. Thanks & Kind Regards, *Logeshwaran G* *"Be Hunger, Stay Foolish"*

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Doubt in Lcr_table
by Logeshwaran G 07 Sep '17

07 Sep '17

Hi, May I know the Difference between the "prefix" column in Lcr_gw table and lcr_rule table. I am using the prefix value in lcr_rule table, like 00091. But What is the use of Prefix Column in lcr_gw table. Input Please Thanks & Kind Regards, *Logeshwaran G* *"Be Hunger, Stay Foolish"*

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Loading keys with key_type="1" from database for htable - Module params help needed
by George Diamantopoulos 06 Sep '17

06 Sep '17

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Call pickup with feature code
by Cyrille Demaret 06 Sep '17

06 Sep '17

Hi, I'm trying to implement call pickup with a feature code for phones that doesn't support "Replaces" header. User has to dial for example *8 to pickup a call who is in the same group pickup. My idea is to loop for each members of the group (coming from a SQL table using sqlops) and check for calls in early state. I was thinking to use the dialog module to search for active calls but I don't find any function allowing to do this. Does anyone know a module with a function allowing to find an active calls by callee? Thank you, Cyrille

1 0

SQL for ordered LCR rules
by Patrick Wakano 06 Sep '17

06 Sep '17

Hello list, Hope you all doing well! I am trying to ease the management of LCR routing rules, since once we begin to have multiple prefixes, multiple GWs and so on, the visualization and management of the rules priorities becomes exponentially hard to do. So first thing I am trying to achieve is an easy way of retrieving the rules in an ordered manner. I couldn't find any tool to do such thing and source code was not very friendly.... so I've come up with this Postgresql query that I think retrieves all rules in the same order I expect LCR to select the GWs. SELECT lr.lcr_id, lr.prefix, lrt.priority, lg.gw_name, lg.ip_addr FROM lcr_rule lr JOIN lcr_rule_target lrt ON lrt.lcr_id = lr.lcr_id AND lrt.rule_id = lr.id JOIN lcr_gw lg ON lg.lcr_id = lr.lcr_id AND lg.id = lrt.gw_id WHERE lr.enabled = 1 AND lg.defunct = 0 AND lr.lcr_id = ID AND lr.prefix SIMILAR TO '(|PREFIX%)' ORDER BY lr.lcr_id, LENGTH(lr.prefix) DESC, lrt.priority; It is missing the weights calculation, but it is rather complex and I am not using it anyway.... Other than that does anyone did something similar to check if my query really matches what LCR engine does? Thanks, Patrick Wakano

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Re: [SR-Users] SQL for ordered LCR rules
by Patrick Wakano 06 Sep '17

06 Sep '17

Thanks for the response guys! The link https://github.com/dimitri/prefixIt is returning 404.... Regarding the performance itself I am not worried since this select it is just for management and I don't expect having millions of rules. The idea is just to have an easy way to have a picture of how the LCR will order and select the gateways based on a given prefix. The three LCR tables are not so easy to handle and manage from command line so my idea was to have a single SELECT or VIEW to return me all I need at once! >From what I could check, I think the select I sent pretty much translates what LCR module does internally, I am just trying to verify if it has some flaw, which could mislead me in the rules management. Cheers, Patrick Wakano On 6 September 2017 at 00:32, Dmitry Sinina <dmitry.sinina(a)onat.edu.ua> wrote: > https://yeti-switch.org/demo.html > > > On 9/5/17 5:29 PM, Dmitry Sinina wrote: > >> And you can try our opensource LCR engine. We use kamailio as load >> balancer and SEMS as SBC. >> >> On 9/5/17 3:02 AM, Patrick Wakano wrote: >> >>> Hello list, >>> >>> Hope you all doing well! >>> I am trying to ease the management of LCR routing rules, since once we >>> begin to have multiple prefixes, multiple GWs and so on, the visualization >>> and management of the rules priorities becomes exponentially hard to do. >>> So first thing I am trying to achieve is an easy way of retrieving the >>> rules in an ordered manner. I couldn't find any tool to do such thing and >>> source code was not very friendly.... so I've come up with this Postgresql >>> query that I think retrieves all rules in the same order I expect LCR to >>> select the GWs. >>> >>> SELECT lr.lcr_id, lr.prefix, lrt.priority, lg.gw_name, lg.ip_addr >>> FROM lcr_rule lr >>> JOIN lcr_rule_target lrt ON lrt.lcr_id = lr.lcr_id AND lrt.rule_id = >>> lr.id <http://lr.id> >>> JOIN lcr_gw lg ON lg.lcr_id = lr.lcr_id AND lg.id <http://lg.id> = >>> lrt.gw_id >>> WHERE lr.enabled = 1 AND lg.defunct = 0 AND lr.lcr_id = ID AND lr.prefix >>> SIMILAR TO '(|PREFIX%)' >>> ORDER BY lr.lcr_id, LENGTH(lr.prefix) DESC, lrt.priority; >>> >>> It is missing the weights calculation, but it is rather complex and I am >>> not using it anyway.... Other than that does anyone did something similar >>> to check if my query really matches what LCR engine does? >>> >>> Thanks, >>> Patrick Wakano >>> >>> _______________________________________________ >>> Kamailio (SER) - Users Mailing List >>> sr-users(a)lists.kamailio.org >>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users >>> >>> >> >

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