Hello,

I’m using Kamailio 4.4.4 with TSILO module in order to support Push Notifications used by our voip app on Apple ios10.

So far, everything works fine:  Kamailio can get an incoming call, suspend it, then send push notification with an external script, receive a new app registration and then call it after resuming the invite.

To do so, thanks to Mr, Cabiddu, I used all the functions described here

http://www.kamailio.org/events/2015-KamailioWorld/Day2/20-Federico.Cabiddu-Kamailio-In-A-Mobile-World.pdf

 

 

Right now, I would like to support serial forking calls using push notification because it was already supported with legacy voip.

To do so, I used failure_route function where, after getting the call destinations and setting them into an avp, I set the new SIP request uri $ru.

Here is my failure_route:

failure_route[MANAGE_FAILURE]

        route(NATMANAGE);

        if (t_is_canceled())

                exit;

 

 

#!ifdef WITH_BLOCK3XX

        # block call redirect based on 3xx replies.

        if (t_check_status("3[0-9][0-9]"))

                t_reply("404","Not found");

                exit;

 

#!endif

 

       if (is_avp_set("$avp(group_members_db)"))

                $ru ="sip:"+$avp(group_members_db)+"@"+$fd;

                $avp(group_members_db) = $null;

                route(LOCATION);

                exit;

 

 

 

I am troubleshooting this scenario and this is what I see:

1) Kamailio receives incoming call

2) Suspend it

3) Send Push notification to account1

4) Kamailio receives account1 registration -> INVRESUME route is now called

5) Then call account1

6) Nobody answers the call

7) failure_route[MANAGE_FAILURE] is now called -> set $ru with next sipaccount: account2

8) suspend invite

9) send push notification to account2

10) account2 sends its sip registration -> INVRESUME route is now called

11) Kamailio calls account1 instead of account2 -> this is my issue

 

On step 10: despite account2 is registered, I checked it using “kamctl ul show”, the second call is forwarded all'account1 and not to account2.

I also checked the TSILO logs and everything seems ok. Here is the logs:

First call:

      suspended transaction [53945:1648394094] asterisk => account1

      htable key value [53945:1648394094]

      resuming trasaction [53945:1648394094] account1 53945:1648394094)

second call:

      suspended transaction [53945:1648394094] asterisk => account2

      htable key value [53945:1648394094]

      resuming trasaction [53945:1648394094] account2 53945:1648394094)

 

In order to find out the issue I put some xlogs, printing $ru value: what I see is the $ru value is set correctly on failure_route but as soon as the t_continue is called, the ru overwritten back to account1

 

Can anyone address me to find out the solution?

Thanks in advance

 

T.

 

 

Tomas Zanet
Software Design Department
tzanet@came.com

 

 

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