sr-users August 2021

sr-users@lists.kamailio.org

49 participants
53 discussions

which is better for B2BUA
by Mojtaba 04 Aug '21

04 Aug '21

Hello there, According to , https://lists.kamailio.org/pipermail/sr-users/2016-March/092058.html, which talked about B2BUA (just signalling) in Kamailio. As i have experienced working with SEMS, freeswitch and Kamailio while using B2BUA feature, Each of them have pros and cons: 1- The sems is a light sip engine server with several applications (like as sbc) for using b2bua. All incoming and outgoing calls could go to sems server for doing b2bua like this: Incoming<=======>Kamailio<========>Sems<========>Kamailio<=======>outgoing 2- In sems, you could disable rtp realying. It forces sems to work just as b2bua without anchoring RTP 3- Easy to use different active profiles in routing. Just a couple of things there are in SEMS. For example, the sems adds itself (local IP) in Via header, and it couldn't be common in b2bua. like this: . . . INVITE sip:200@cloud.domain.com;transport=UDP SIP/2.0 Via: SIP/2.0/UDP 10.10.10.200;branch=z9hG4bK2f53.07a3fd9edaa8c8d609ab2ac6b01a087f.0 *================================>Kamailio public IP* *Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKsPRMNast;rport=5080 ===============================>private loopback sems ip* From: <sip:100@cloud.domain.com ;transport=UDP>;tag=6FFDB493-60EABB3600016ECD-379F9700 To: <sip:200@cloud.domain.com;transport=UDP> CSeq: 10 INVITE Call-ID: Y2M1ODQxNTZmMjdkZWZjN2U5MmMyYjBmN2Y2OGY1ODQ._leg2 Route: <sip:mo@127.0.0.1:5060;lr> Max-Forwards: 69 Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE User-Agent: Z 3.3.25608 r25552 Content-Type: application/sdp Contact: <sip:127.0.0.1:5080;transport=udp> Content-Length: 246 . . . For this reason, Is there a way to avoid this issue? I know it is possible to do this by using other modules like textops and retransformation ? And why in Kamailio, there is no b2bua module to perform all b2bua functionality, yet? Thanks with Best Regards. -- --Mojtaba Esfandiari.S

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How to unload previously loaded destinations in the case of applying multiple ds_select_domain
by Serdar GÜÇLÜER 03 Aug '21

03 Aug '21

Hello all, I have a trouble that is related to the way of usage of dispatcher module. I am working with Kamailio 5.3.2 and using dispatcher module as load balancer to route calls to the media gateways. My dispatching routes are below as simply, route[DISPATCH] { if(ds_select_domain("2", "4")) { route(MYRELAY); } else { send_reply("503","Service Unavailable - No MGW"); exit; } } route[MYRELAY] { t_on_failure("MYFAILURE"); if(!t_relay()) { sl_reply_error(); } exit; } failure_route[MYFAILURE] { route(NATMANAGE); revert_uri(); if (t_is_canceled()) { exit; } if ($T_reply_code == 408 || $T_reply_code == 503) { if(ds_next_domain()) { route(MYRELAY); } else { send_reply("503","Service Unavailable"); exit; } } else { if(ds_select_domain("6", "4")) { route(MYVMRELAY); } else { send_reply(486,"Busy"); exit; } } } route[MYVMRELAY] { t_on_failure("MYVMFAILURE"); if(!t_relay()) { sl_reply_error(); } exit; } failure_route[MYVMFAILURE] { route(NATMANAGE); revert_uri(); if (t_is_canceled()) { exit; } if(ds_next_domain()) { route(MYVMRELAY); } else { send_reply("503","Service Unavailable"); exit; } } I have multiple media gateways(setid=2) and voicemail servers(setid=6). As can be seen from the configuration, after first routing, for transaction reply code except 408 or 503, I am routing call to the voicemail server using dispatcher. In that phase, dispatcher module is remembering previously loaded destinations that come from first ds_select_domain and module try to route these destinations in the case that all voicemail servers are unavailable. So basically, I want to unload all destinations comes from previous ds_select_domain. From the documentation, i tried ds_load_update and ds_load_unset methods but not worked for me. Is there any way to overcome that problem or any right usages of these methods. Thank you, Serdar

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Re: [SR-Users] How to unload previously loaded destinations in the case of applying multiple ds_select_domain
by Serdar GÜÇLÜER 02 Aug '21

02 Aug '21

Hello Daniel, I removed xavps using with xavp_rm and problem solved. Thanks for your helping Serdar > Hello, > > delete the xavps based on the names you set via modparams xavp_dst and > xavp_ctx. > > Cheers, > Daniel > > On 30.07.21 11:14, Serdar GÜÇLÜER wrote: > >/Hello all, />//>/I have a trouble that is related to the way of usage of dispatcher > module. />//>/I am working with Kamailio 5.3.2 and using dispatcher module as load />/balancer to route calls to the media gateways. />//>/My dispatching routes are below as simply, />//>/route[DISPATCH] { />/ if(ds_select_domain("2", "4")) { />/ route(MYRELAY); />/ } else { />/ send_reply("503","Service Unavailable - No MGW"); />/ exit; />/ } />/} />/route[MYRELAY] { />/ t_on_failure("MYFAILURE"); />/ if(!t_relay()) { />/ sl_reply_error(); />/ } />/ exit; />/} />/failure_route[MYFAILURE] { />/ route(NATMANAGE); />/ revert_uri(); />/ if (t_is_canceled()) { />/ exit; />/ } />/ if ($T_reply_code == 408 || $T_reply_code == 503) { />/ if(ds_next_domain()) { />/ route(MYRELAY); />/ } else { />/ send_reply("503","Service Unavailable"); />/ exit; />/ } />/ } else { />/ if(ds_select_domain("6", "4")) { />/ route(MYVMRELAY); />/ } else { />/ send_reply(486,"Busy"); />/ exit; />/ } />/ } />/} />/route[MYVMRELAY] { />/ t_on_failure("MYVMFAILURE"); />/ if(!t_relay()) { />/ sl_reply_error(); />/ } />/ exit; />/} />/failure_route[MYVMFAILURE] { />/ route(NATMANAGE); />/ revert_uri(); />/ if (t_is_canceled()) { />/ exit; />/ } />/ if(ds_next_domain()) { />/ route(MYVMRELAY); />/ } else { />/ send_reply("503","Service Unavailable"); />/ exit; />/ } />/} />//>//>/I have multiple media gateways(setid=2) and voicemail />/servers(setid=6). As can be seen from the configuration, />/after first routing, for transaction reply code except 408 or 503, I />/am routing call to the voicemail server using dispatcher. />/In that phase, dispatcher module is remembering previously loaded />/destinations that come from first ds_select_domain />/and module try to route these destinations in the case that all />/voicemail servers are unavailable. />/So basically, I want to unload all destinations comes from previous />/ds_select_domain. />//>/From the documentation, i tried ds_load_update and ds_load_unset />/methods but not worked for me. />//>/Is there any way to overcome that problem or any right usages of these />/methods. />//>/Thank you, />//>/Serdar />//>//>/__________________________________________________________ />/Kamailio - Users Mailing List - Non Commercial Discussions />/* sr-users at lists.kamailio.org > <https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users> />/Important: keep the mailing list in the recipients, do not reply only > to the sender! />/Edit mailing list options or unsubscribe: />/* https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users > <https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users> / > -- > Daniel-Constantin Mierla -- www.asipto.com > www.twitter.com/miconda -- www.linkedin.com/in/miconda

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sr-users August 2021