Re: [Asterisk-java-users] Wrong PJSIP_HEADER read

[Yves <yv...@gm...>]

Hello Ahmed,

thanks for you valuable findings. To find out, whats going on, I´d like 
to copy your setup; so, what versions are you using concerning
- OperatingSystem
- Asterisk
- Asterisk-Java

How do you "time" the Hangup so that it occurs between the two 
getHeader-Methods... or do you delay the execution in between
to better simulate, whats going on, if this special case occurs?

regards,
Yves

Am 21.12.2018 um 01:08 schrieb Salahuddin Ahmed:
> Hello,
>
> Let's explain the issue,
> In our agi script has those following header read,
>
> AGI Code:
> =========================================
> String fromHeader = getHeaderValue("FROM");
> String paidHeader = getHeaderValue("P-ASSERTED-IDENTITY");
> String privacyHeader = getHeaderValue("PRIVACY");
> String toHeader = getHeaderValue("TO");
> =========================================
>
> 4573 port trace
> =========================================
> T 172.32.60.11:4573 <http://172.32.60.11:4573> -> 172.32.10.70:38630 
> <http://172.32.10.70:38630> [AP]
>  GET VARIABLE"PJSIP_HEADER(read,FROM)".
> #
> T 172.32.10.70:38630 <http://172.32.10.70:38630> -> 172.32.60.11:4573 
> <http://172.32.60.11:4573> [AP]
>  HANGUP.
> #
> T 172.32.60.11:4573 <http://172.32.60.11:4573> -> 172.32.10.70:38630 
> <http://172.32.10.70:38630> [AP]
>   GET VARIABLE "PJSIP_HEADER(read,P-ASSERTED-IDENTITY)".
> #
> T 172.32.10.70:38630 <http://172.32.10.70:38630> -> 172.32.60.11:4573 
> <http://172.32.60.11:4573> [AP]
>   200 result=1 (<sip:12016615429@172.32.100.100 
> <mailto:sip%3A12016615429@172.32.100.100>>;tag=1).
> #
> T 172.32.60.11:4573 <http://172.32.60.11:4573> -> 172.32.10.70:38630 
> <http://172.32.10.70:38630> [AP]
>   GET VARIABLE "PJSIP_HEADER(read,PRIVACY)".
> #
> ===========================================
>
> When a new call arrived those lines are executing, and during that 
> execution, if caller canceled the call then a HANGUP message send from 
> asterisk to asterisk-java. If asterisk-java waits for any response of 
> one of those 4 requests then I think asteris-agi get confused and the 
> all further response will be shifted. Now according to code if 
> asterisk-java received a response without "200 result=1" format, it 
> discards that response, but this response does not belong to that 
> request. In the next read, the actual value will appear.
>
> Now in this scenario,  what would be the solution? could anyone please 
> suggest this?
>
> Thanks,
> Salah Ahmed
>
> On Tue, Dec 18, 2018 at 1:31 PM Salahuddin Ahmed <tx...@gm... 
> <mailto:tx...@gm...>> wrote:
>
>     Hello,
>
>     Recently I have noticed an error in my service. After some
>     investigation, we found that its due to some calls is terminated
>     very early.
>
>     The scenario is, If Caller-A sends an INVITE to Asterisk, This
>     INVITE processed on an agi method. On that method, we read several
>     sip custom and default sip header for our processing.
>
>     But during this processing, if Caller-A sends CANCEL then some
>     header value read get malformed. Actually, it seems it gets
>     shifted, suppose if we read To header first and then cseq, TO
>     header value set to cseq value and TO return NULL. We have added
>     some debug log in asterisk code and found, asterisk return good
>     value. The time between INVITE and CANCEL is 50 ms.
>
>     We have implemented AGIHangupException in our agi method, but this
>     exception does not catch by this CANCEL request.
>
>     Any idea/solution is appreciated.
>
>     Thanks in advance,
>     Salah Ahmed
>
>
>
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