[OpenSIPS-Users] Drouting failover by carrier only

[Alex A]

3.0.2

On Apr 30, 2020, 9:12 AM, at 9:12 AM, Johan De Clercq <johan at democon.be> wrote:
>on what version is this ?
>
>Op do 30 apr. 2020 om 15:09 schreef Alex A
><alex.a at gtanetworkconsulting.com
>>:
>
>> Setting the "First Only" flag on the carrier seem to be done the
>trick for
>> me.
>> It round-robins, while failing over to another carrier directly.
>>
>>
>> Thank you for your help.
>>
>>
>>
>>
>> ---- On Thu, 30 Apr 2020 07:12:04 -0400 *Alex A
>> <alex.a at gtanetworkconsulting.com <alex.a at gtanetworkconsulting.com>>*
>> wrote ----
>>
>> Thank you for the tip, Ben.
>>
>> Do you by chance have a script snipped for this scenario?
>>
>> For some reason, the drouting part:
>>         if (!do_routing(0,"F")) {
>>                 xlog("DRoute GATEWAY: Failed. source:$si -$fU ->
>$rU\n");
>>                 send_reply(500, "No Gateway to Route found");
>>                 exit;
>>         }
>>         xlog("Before Entering Relay\n CarrierID_avp:
>$avp(carrier_id), GW
>> ID avp: $avp(gw_id)");
>>         route(relay);
>>
>> Both AVPs return a single value instead of the a list for me, so I
>must be
>> missing something.
>>
>>
>> Thanks.
>>
>>
>>
>>
>> ---- On Wed, 29 Apr 2020 14:50:38 -0400 *Ben Newlin
>> <Ben.Newlin at genesys.com <Ben.Newlin at genesys.com>>* wrote ----
>>
>> We also had a need to do this and did not find a way to do it via
>drouting
>> directly, but it will work with drouting with a little help.
>>
>>
>>
>> First, we specify the carrier_id_avp param [1]. After we call
>do_routing,
>> we copy out the carrier IDs from that avp into our own AVP. Then we
>use
>> route_to_carrier [2] for each carrier ID in the list. To continue
>routing
>> within the carrier, you can still do use_next_gw. When that returns
>false
>> (no more gateways), or if you want to skip to the next carrier you
>just
>> call route_to_carrier again with the next ID in your list.
>>
>>
>>
>> This solved two problem for us:
>>
>> * allows us to fail over by carrier instead of just by gateway
>>
>> * allows us to call do_routing multiple times for a call with
>different
>> groups and aggregate the results
>>
>>
>>
>> [1] -
>>
>https://opensips.org/docs/modules/3.0.x/drouting.html#param_carrier_id_avp
>>
>> [2] -
>>
>https://opensips.org/docs/modules/3.0.x/drouting.html#func_route_to_carrier
>>
>>
>>
>>
>>
>> Ben Newlin
>>
>>
>>
>> *From: *Users <users-bounces at lists.opensips.org> on behalf of Alex A
><
>> alex.a at gtanetworkconsulting.com>
>> *Reply-To: *OpenSIPS users mailling list <users at lists.opensips.org>
>> *Date: *Wednesday, April 29, 2020 at 2:40 PM
>> *To: *users <users at lists.opensips.org>
>> *Subject: *[OpenSIPS-Users] Drouting failover by carrier only
>>
>>
>>
>> Hi Everyone,
>>
>>
>>
>> Is it possible to failover to next carrier (instead next gateway)
>while
>> using drouting?
>>
>>
>>
>>
>>
>> I got the below to work; however currently, use_next_gw gets the next
>> gateway in the list, so
>>
>> if gwlist= #0,#3
>>
>>
>>
>> and one of the carriers has multiple gateway IPs, the retry happens
>many
>> times to the same carrier:
>>
>>
>>
>>
>>
>> route[droute] {
>>
>>
>>
>>         xlog("DRoute GATEWAY: source:$si - $fU -> $rU\n");
>>
>>         if (!do_routing(0,"F")) {
>>
>>                 xlog("DRoute GATEWAY: Failed. source:$si -$fU ->
>$rU\n");
>>
>>                 send_reply(500, "No Gateway to Route found");
>>
>>                 exit;
>>
>>         }
>>
>>         route(relay);
>>
>>         exit;
>>
>>
>>
>>         }
>>
>>
>>
>> route[relay] {
>>
>>
>>
>>         if (is_method("INVITE")) {
>>
>>                 t_on_failure("missed_call");
>>
>>         }
>>
>>
>>
>>         if (!t_relay()) {
>>
>>                 if (use_next_gw()) {
>>
>>                       xlog("L_INFO","Next Gateway: From=$fu,
>> To=$tu,RU=$ru, CI=$ci IP=$si\n");
>>
>>                       t_on_failure("missed_call");
>>
>>                       route(relay);
>>
>>                       exit;
>>
>>                 }
>>
>>                 else {
>>
>>                         send_reply(503, "Service not available, no
>more
>> gws");
>>
>>                         exit;
>>
>>                 }
>>
>>         };
>>
>>         exit;
>>
>> }
>>
>>
>>
>>
>>
>> failure_route[missed_call] {
>>
>>
>>
>>                 #if (use_next_gw(, , $var(carrier_attrs))) {
>>
>>                 if (use_next_gw(, $avp(gw_id),$avp(carrier_id))) {
>>
>>                       xlog("MissedCall--Next Gateway: From=$fu,
>> To=$tu,RU=$ru, CI=$ci IP=$si\n");
>>
>>                       xlog("Carrier attributes of current gateway:
>> $avp(gw_id). carrier: $avp(carrier_id)\n");
>>
>>
>>
>>                       t_on_failure("missed_call");
>>
>>                       route(relay);
>>
>>                       exit;
>>
>>                 }
>>
>>                 else {
>>
>>                         send_reply(503, "Service not available, no
>more
>> gws");
>>
>>                         exit;
>>
>>                 }
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Thank you.
>>
>>
>>
>>
>>
>>
>>
>>
>>
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>>
>>
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>
>
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