[OpenSIPS-Users] PBX sending calls to Opensips
Schneur Rosenberg
rosenberg11219 at gmail.com
Tue Jul 31 01:39:47 CEST 2012
Ali I can't compare PBX addresses, we are a voip company and I can't
manually edit my script for every PBX our customer installs, I ended
up doing the avp_db_query() and then rewriting the from header with
uac_replace_from("","sip:$au@$si") which will retrieve the username
from the Proxy-Authorization: field, I had to use uac_replace_from
because $fu is read only.
On Wed, Jul 25, 2012 at 11:58 PM, Ali Pey <alipey at gmail.com> wrote:
> This would work too. Here though you do a db query for each call and can
> slow down the performance if that's important to you. Examining usernames'
> patterns can be faster.
>
> You can also use the registered function instead of a db query:
>
> if (registered("location","$fu")) {
> xlog("caller is registered\n");
> }
>
> http://www.opensips.org/html/docs/modules/1.8.x/registrar.html#id293162
>
> Regards,
> Ali Pey
>
>
> On Wed, Jul 25, 2012 at 4:23 PM, Schneur Rosenberg
> <rosenberg11219 at gmail.com> wrote:
>>
>> I already did something similar look at snippet bellow so any call
>> coming from a IP thats registered to our server will always do
>> proxy_authorize(), other calls will assume that its a unauthenticated
>> DID call or a call going to a local call
>>
>> if (!(method=="REGISTER"))
>> {
>> avp_db_query("select username from location where
>> contact regexp '$si' or received like
>> 'sip:$si%'","$avp(is_registered)");
>> }
>> if (!(method=="REGISTER") && avp_check("$avp(is_registered)",
>> "gt/1/g"))
>> {
>> if(!is_from_gw())
>> {
>> if (!proxy_authorize("sosglobal", "subscriber"))
>> {
>> append_hf("P-hint: Proxy auth
>> failed\r\n");
>> proxy_challenge("sosglobal", "0");
>> exit;
>> }
>>
>>
>> }
>>
>>
>> On Wed, Jul 25, 2012 at 8:48 PM, Ali Pey <alipey at gmail.com> wrote:
>> > Schneur,
>> >
>> > You can examine the src_ip first to see if the call if from your pbx or
>> > not.
>> > Then you can also examine to request-uri to distinguish the call between
>> > a
>> > pstn call or a sip client - assuming your sip clients have a different
>> > sip
>> > address/pattern than pstn numbers. Things like this:
>> >
>> > if ( src_ip == pbx1_ip || src_ip == pbx2_ip ){
>> > # From PBXs
>> > }
>> >
>> > if ($rU=~"^\+?[0-9]{3,18}") {
>> > # request-uri is for a PSTN number, send the message to whatever
>> > route(1)
>> > }
>> >
>> > Basically you need to find a difference between the call attributes and
>> > examine that, it can be the src_ip, ruri pattern, etc.
>> >
>> > Regards,
>> > Ali Pey
>> >
>> > On Wed, Jul 25, 2012 at 9:41 AM, Schneur Rosenberg
>> > <rosenberg11219 at gmail.com> wrote:
>> >>
>> >> check_source_address won't work for me, my clients are behind Dynamic
>> >> ip's, there is no way for me to know in advance their ip address
>> >>
>> >> On Mon, Jul 23, 2012 at 8:55 PM, Brett Nemeroff <brett at nemeroff.com>
>> >> wrote:
>> >> > Scot,
>> >> > the function "is_from_local" uses the From URI and as such, will not
>> >> > work if
>> >> > the originator mangles the from uri (as in the case of your example
>> >> > below).
>> >> >
>> >> > A more secure way to do this that may suit your needs is to use the
>> >> > permissions module and actually check the source IP of the request:
>> >> >
>> >> >
>> >> >
>> >> > http://www.opensips.org/html/docs/modules/1.8.x/permissions.html#id293503
>> >> >
>> >> > Look at the "check_source_address" and or "get_source_group". Either
>> >> > of
>> >> > these can compare the source IP of the originator to a known list.
>> >> > From
>> >> > there, you can perform script logic based on where the request came
>> >> > from.
>> >> >
>> >> > Hope that helps!
>> >> > -Brett
>> >> >
>> >> >
>> >> > On Mon, Jul 23, 2012 at 11:38 AM, Schneur Rosenberg
>> >> > <rosenberg11219 at gmail.com> wrote:
>> >> >>
>> >> >> I'm using opensips as a registrar server and as a loadbalancer, all
>> >> >> phones are registered to opensips and all incoming and outgoing
>> >> >> calls
>> >> >> go to Asterisk boxes via load balancing, therefore I have 3 kinds of
>> >> >> calls going to opensips,
>> >> >> 1) outgoing calls coming from one of the phones Registered to
>> >> >> opensips,
>> >> >> 2) incoming calls (we allow all incoming calls no matter from where
>> >> >> they come, I call them unauthenticated DID)
>> >> >> 3) Calls ringing to a phone registered to opensips, the Asterisk
>> >> >> boxes
>> >> >> will send the calls to the phone either after getting a call from a
>> >> >> DID, or when a internal user wants to call another internal user
>> >> >>
>> >> >> The way I differentiate between the calls is I do a if
>> >> >> (!(method=="REGISTER") && is_from_local()) this will check
>> >> >> credentials
>> >> >> and send call to asterisk to process outgoing call, then I do a
>> >> >> else
>> >> >> if ((method=="INVITE")) which will check if the call is going to a
>> >> >> local phone by doing if (!lookup("location", "m")) if that fails
>> >> >> that
>> >> >> it assumes its a incoming did call, and it will send it to asterisk
>> >> >> with a prefix so asterisk knows its a unauthenticated incoming call,
>> >> >> bellow I pasted a skeleton of the code I'm using.
>> >> >>
>> >> >> Everything worked fine, until I connected a PBX to my opensips, then
>> >> >> the from came in with the address of the PBX and the
>> >> >> is_from_local()
>> >> >> test was not true, so it did not work, I had the same problem when
>> >> >> sending a call from a SPA3000 and blocking caller id, in that case
>> >> >> it
>> >> >> also obscured the from address, as follows "From: Anonymous
>> >> >> <sip:anonymous at localhost>;tag=ea3ee097cd947aeeo0." , the only
>> >> >> reference of the user or domain was in the RPID field and calls did
>> >> >> not go through.
>> >> >>
>> >> >> Is there anyway to check if a source IP is registered to our system
>> >> >> and only then it should send a 407? this way if I have a BPX
>> >> >> registered it will then ask for credentials, all others it will
>> >> >> assume
>> >> >> that either a call to the local phone or unauthenticated DID, I
>> >> >> understand that I wont be able to send calls to the system only if
>> >> >> registration was done before, but I have no problem with that, I
>> >> >> could do it with avp_db_query() on the subscriber table, but I want
>> >> >> to
>> >> >> know if there is a better way.
>> >> >>
>> >> >> If there is there a better solution then the above solution please
>> >> >> let
>> >> >> me
>> >> >> know
>> >> >>
>> >> >> if (!(method=="REGISTER") && is_from_local())
>> >> >> {
>> >> >> #check credentials
>> >> >> }
>> >> >> else if ((method=="INVITE")) #unathenticated did or call
>> >> >> going to phone registered to opensips
>> >> >> {
>> >> >>
>> >> >> if (!lookup("location", "m")) #calling local phone
>> >> >> {
>> >> >> #send to phone registered to opensips
>> >> >> }
>> >> >> else
>> >> >> {
>> >> >> #incoming did send call to asterisk to
>> >> >> process
>> >> >> }
>> >> >> }
>> >> >> else
>> >> >> {
>> >> >> #outgoing calls route continues here
>> >> >> }
>> >> >> ...................................
>> >> >>
>> >> >> _______________________________________________
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>> >> >> Users at lists.opensips.org
>> >> >> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>> >> >
>> >> >
>> >> >
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>> >> >
>> >>
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>> >
>> >
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