28 Sep
2013
28 Sep
'13
8:49 a.m.
I'm trying to implement a load balancer for asterisk servers using
kamailio and the tutorial at
http://kb.asipto.com/asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb
I must fit the balancer in an infrastructure without touching the
other media servers (asterisk) which require a username/password
authentication.
The sample implementation constructs a register request from scratch,
but does not handle authorization and thus fails. I cannot change the
current sip servers and their configuration as these are a live system
and I'm not allowed to touch it.
I would really appreciate some hints on how to proceed.
# Forward REGISTER to Asterisk
route[REGFWD] {
if(!is_method("REGISTER"))
{
return;
}
$var(rip) = $sel(cfg_get.asterisk.bindip);
$uac_req(method)="REGISTER";
$uac_req(ruri)="sip:" + $var(rip) + ":" +
$sel(cfg_get.asterisk.bindport);
$uac_req(furi)="sip:" + $au + "@" + $var(rip);
$uac_req(turi)="sip:" + $au + "@" + $var(rip);
$uac_req(hdrs)="Contact: <sip:" + $au + "@"
+ $sel(cfg_get.kamailio.bindip)
+ ":" + $sel(cfg_get.kamailio.bindport) + ">\r\n";
if($sel(contact.expires) != $null)
$uac_req(hdrs)= $uac_req(hdrs) + "Expires: " + $sel(contact.expires) +
"\r\n";
else
$uac_req(hdrs)= $uac_req(hdrs) + "Expires: " + $hdr(Expires) +
"\r\n";
uac_req_send();
}
Thank you,
Paul.
29 Sep
29 Sep
2:27 a.m.
New subject: Fwd: kamailio registering on back-end asterisk with username and password
Hello all,
I'm trying to implement a load balancer for asterisk servers using
kamailio and the tutorial at
http://kb.asipto.com/asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb
I must put kamailio in front of the media servers (asterisk) without
modifying their configuration (like a transparent proxy). It's a live
system and I cannot touch it.
The problem is that the asterisks require the devices to authenticate
themselves (and register with user and password too).
The sample implementation constructs a register request from scratch,
but does not handle the authorisation part
I guess that the uac_req should contain the user and password fetched
from the asterisk database. I would really appreciate some hints on
how to proceed.
Here's the current implementation of the register from kamailio->asterisk.
# Forward REGISTER to Asterisk
route[REGFWD] {
if(!is_method("REGISTER"))
{
return;
}
$var(rip) = $sel(cfg_get.asterisk.bindip);
$uac_req(method)="REGISTER";
$uac_req(ruri)="sip:" + $var(rip) + ":" +
$sel(cfg_get.asterisk.bindport);
$uac_req(furi)="sip:" + $au + "@" + $var(rip);
$uac_req(turi)="sip:" + $au + "@" + $var(rip);
$uac_req(hdrs)="Contact: <sip:" + $au + "@"
+ $sel(cfg_get.kamailio.bindip)
+ ":" + $sel(cfg_get.kamailio.bindport) + ">\r\n";
if($sel(contact.expires) != $null)
$uac_req(hdrs)= $uac_req(hdrs) + "Expires: " + $sel(contact.expires) +
"\r\n";
else
$uac_req(hdrs)= $uac_req(hdrs) + "Expires: " + $hdr(Expires) +
"\r\n";
uac_req_send();
}
Thank you,
Paul.
11:40 a.m.
New subject: Fwd: kamailio registering on back-end asterisk with username and password
I think, it will be much better to plane reorganization of whole process.
To start using Kamailio as registrar and load balance, and Asterisk as
media servers, dial plan etc.
But, in current situation, I can suggest next:
1. You can not use authorization of Kamailio. You can use Kamailio only and
alone as load balance. All requests to Kamailio you can forward to Asterisk
servers.
2. When you get first request from somebody - you can do something like:
ds_select_dst("1","4");
$sht(forw=>$ft)=$du;
This way you will store address of Asterisk, where you forwarded request.
3. When you have next request from same "person" you can do:
$du=$sht(forw=>$ft);
I am using something alike, but only for active calls. All my registrations
are handled by Kamailio, and Asterisk servers do not participate in
authentication.
On Sun, Sep 29, 2013 at 3:27 AM, Paul Penev <ppquant(a)gmail.com> wrote:
Hello all,
I'm trying to implement a load balancer for asterisk servers using
kamailio and the tutorial at
http://kb.asipto.com/asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb
I must put kamailio in front of the media servers (asterisk) without
modifying their configuration (like a transparent proxy). It's a live
system and I cannot touch it.
The problem is that the asterisks require the devices to authenticate
themselves (and register with user and password too).
The sample implementation constructs a register request from scratch,
but does not handle the authorisation part
I guess that the uac_req should contain the user and password fetched
from the asterisk database. I would really appreciate some hints on
how to proceed.
Here's the current implementation of the register from kamailio->asterisk.
# Forward REGISTER to Asterisk
route[REGFWD] {
if(!is_method("REGISTER"))
{
return;
}
$var(rip) = $sel(cfg_get.asterisk.bindip);
$uac_req(method)="REGISTER";
$uac_req(ruri)="sip:" + $var(rip) + ":" +
$sel(cfg_get.asterisk.bindport);
$uac_req(furi)="sip:" + $au + "@" + $var(rip);
$uac_req(turi)="sip:" + $au + "@" + $var(rip);
$uac_req(hdrs)="Contact: <sip:" + $au + "@"
+ $sel(cfg_get.kamailio.bindip)
+ ":" + $sel(cfg_get.kamailio.bindport) + ">\r\n";
if($sel(contact.expires) != $null)
$uac_req(hdrs)= $uac_req(hdrs) + "Expires: " + $sel(contact.expires) +
"\r\n";
else
$uac_req(hdrs)= $uac_req(hdrs) + "Expires: " + $hdr(Expires) +
"\r\n";
uac_req_send();
}
Thank you,
Paul.
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30 Sep
30 Sep
6:56 p.m.
New subject: Fwd: kamailio registering on back-end asterisk with username and password
2013/9/29 Stoyan Mihaylov <stoyan.v.mihaylov(a)gmail.com>om>:
I think, it will be much better to plane
reorganization of whole process. To
start using Kamailio as registrar and load balance, and Asterisk as media
servers, dial plan etc.
I agree. This is the next for me. I kind of hope to use freeswitch for that too.
But, in current situation, I can suggest next:
1. You can not use authorization of Kamailio. You can use Kamailio only and
alone as load balance. All requests to Kamailio you can forward to Asterisk
servers.
2. When you get first request from somebody - you can do something like:
ds_select_dst("1","4");
$sht(forw=>$ft)=$du;
This way you will store address of Asterisk, where you forwarded request.
3. When you have next request from same "person" you can do:
$du=$sht(forw=>$ft);
I am using something alike, but only for active calls. All my registrations
are handled by Kamailio, and Asterisk servers do not participate in
authentication.
I guess you're registering in Kamailio but your "TOASTERISK" and
"FROMASTERISK" routes relay the entire session directly to the
asterisk server that was selected without touching it. I must look in
this.
Regarding the "easy" solution you proposed, if I understand correctly,
I need to implement a single route function with a simple dipatcher,
like the example in the dipatcher module:
route{
if ( !mf_process_maxfwd_header("10") )
{
sl_send_reply("483","To Many Hops");
drop();
};
ds_select_dst("2", "0");
forward();
# t_relay();
}
How do I modify that example to recognize that a request is coming
from the same "user" ?
1 Oct
1 Oct
5:20 p.m.
New subject: Fwd: kamailio registering on back-end asterisk with username and password
How do I modify that example to recognize that a request is coming
from the same "user" ?
Reading, and making experiments :)
At least I worked such way.
Logic must look like:
If you have associated variable with that user - use already selected
route. Else, ds_select_dst and associate user with that route.
You can check $sht(forw=>$ft) and how it is used.
3867
days inactive
3870
days old
4 comments
2 participants
participants (2)
-
Paul Penev -
Stoyan Mihaylov