Hey guys
I am pretty new in Asterisk and still using my Freepbx but configuring now most of it in my custom dialplan. I connected the Asterisk to my Avaya Session Manager and my Avaya Communication Manager.
If I am sending calls from CM via SM to Asterisk, I want to make use of some information from the History fields in the invite (highlited):
Is there any way to do so? I need to check the previously called device (+58843 in my example)…
TIA
Cheers
There is no built in support for that header in either chan_sip or chan_pjsip. The only option would be to use the header retrieval of the respective channel driver to get it from the INVITE. In the case of chan_pjsip this is the PJSIP_HEADER[1] dialplan function. You would then need to parse and interpret it yourself.
[1] https://wiki.asterisk.org/wiki/display/AST/Asterisk+14+Function_PJSIP_HEADER
Hey jcolp
As I wrote before, I am very new to Asterisk. I am also not a native english speaker… I am German…
Would you mind giving me a hint on how to put this history info into an Asterisk variable?
TIA
Cheers
https://wiki.asterisk.org/wiki/display/AST/Asterisk+12+Function_PJSIP_HEADER
https://wiki.asterisk.org/wiki/display/AST/Asterisk+11+Function_SIP_HEADER
Hey guys
I am struggeling right from the beginning… 
Wanted to start with the example out of the Asterisk documentation and just write the content of a sip header “From” read-out into a file. Did it this way in my extensions_custom.conf:
[CallDisplayOnTV]
exten => 90999,1,NoOp
exten => 90999,n,Set(mysipvar=${PJSIP_HEADER(read,From)})
exten => 90999,n,System(echo “${STRFTIME(${EPOCH},%d.%m.%Y, %H:%M:%S)} - ${mysipvar}” >> /var/log/asterisk/Sascha-Sipvar.log)
exten => 90999,n,Macro(CallDisplayOnTV)
After calling a station (which has kind of “double call” administered in my CM to 90999) I get a file output, but just with the time and date. Seems that my variable “mysipvar” does not have any content:
[root@VoIPServer ~]# cat /var/log/asterisk/Sascha-Sipvar.log
23.02.2017, 12:26:53 -
23.02.2017, 12:31:27 -
[root@VoIPServer ~]#
Where is my mistake?
TIA
I’d suggest adding a step which does a NoOp of the value ${mysipvar} to confirm that the contents are as you expect before the call to System.
Like this?
exten => 90999,n,Set(mysipvar=${PJSIP_HEADER(read,From)})
exten => 90999,n,NoOp
exten => 90999,n,System(echo “${STRFTIME(${EPOCH},%d.%m.%Y, %H:%M:%S)} - ${mysipvar}” >> /var/log/asterisk/Sascha-Sipvar.log)
No change…
No, you have to have NoOp output the value like so:
NoOp(${mysipvar})
If that does not contain the value then the problem is with PJSIP_HEADER. If it does then the problem is with your use of System.
This helps narrow it down.
Okay…
Hope I picked the proper output from log:
[2017-02-23 14:34:22] VERBOSE[23236][C-0000007c] pbx.c: Executing [90999@CallDisplayOnTV:3] NoOp(“SIP/AvayaSessionManager-0000007c”, “”) in new stack
Seems that the value indeeed is empty, right?
Yes, because you are using chan_sip and not chan_pjsip. The PJSIP_HEADER dialplan function is for chan_pjsip. You need to use SIP_HEADER which @david551 linked earlier.
Where do you see that from this log output?
Checking the SIP_Header documentation it seems to be very limited… pjsip offers more examples…
How - for my example - can you translate the line to get my variable filled with a value?
Also it seems for me chan_sip seems to be outdated? Can I easlily switch between those two versions?
Cheers
I can see you are using the SIP channel driver based on the name of the channel: SIP/AvayaSessionManager-0000007c
If you were using PJSIP it would start with PJSIP/
I haven’t used SIP_HEADER before but the documentation shows that it would be ${SIP_HEADER(From)}
As for easily switching they take completely different configuration files, so you would need to rewrite your sip.conf into pjsip.conf
Thanks, jcolp!
Will try. As this is a FreePBX with a GUI, this seems to be able to be changed via the Web interface somehow. But will try your suggestion first.
Wow!
Seems to work now basically 
Output of my logfile now has some more information:
23.02.2017, 14:55:30 - sip:000496158xxxxx@sip.saschakamm.local;tag=bcd63e2cf9cf41e6bb720c29b8fde3
Now I can start playing around with the fields I am really looking for
Thanks for your support!
Again: WOW! 
Works also with the History-Info field:
23.02.2017, 15:01:17 - sip:+58176@sip.saschakamm.local;index=1
Thanks again. Now I just need to parse the string into the values I need to work on with them!
Cheers
Here I am again…
This is where I am currently:
exten => s,n,Set(sipinvitehistory3=${SIP_HEADER(History-Info,3)})
exten => s,n,Set(historyname=${sipinvitehistory3:0:8}
exten => s,n,Set(historynumber=${sipinvitehistory3:14:6}
exten => s,n,System(echo “${STRFTIME(${EPOCH},%d.%m.%Y, %H:%M:%S)} - ${historyname} - ${historynumber}” >> /var/log/asterisk/Sascha-Sipvar.log)
So, I am reading the history info from the invite and split it into two new variables:
The name and the number.
Result looks good in my log:
24.02.2017, 12:39:20 - Sascha - +58176
But: The name could be different length (number also) and I am unable to find an asterisk command to check a string for the position of a character which I can use…
I would need a command which gives me back the position of the character < out of my string ‘24.02.2017, 09:44:14 - Sascha sip:+58176@sip.saschakamm.local;index=1.2’ which I get back from reading the History info field…
If I know the position of ‘<’ and ‘@’ it is just a little bit of mathematics and I always get the result I am looking for - regardless length of numer and name.
TIA
Cheers
I would look at the : operator in https://wiki.asterisk.org/wiki/display/AST/Operators
Also consider https://wiki.asterisk.org/wiki/display/AST/Asterisk+13+Function_CUT
I think there are others, as well.
You guys are all really cool…
Don’t share the answer on a silver tablet but point to the documentation where I can find my information needed, but still need to make use of my brain
Kind of: “RTFM” but look into this one here
But: Seens to work.
I do not know If I am doing too many steps in between for what I want to get, but it is now working.
These are my steps in dialplan:
exten => s,n,Set(sipinvitehistory3=${SIP_HEADER(History-Info,3)})
exten => s,n,Set(historyname=${CUT(sipinvitehistory3,<,1)})
exten => s,n,Set(historynumber1=${CUT(sipinvitehistory3,<,2)})
exten => s,n,Set(historynumber2=${historynumber1:4:50}
exten => s,n,Set(historynumber=${CUT(historynumber2,@,1)})
exten => s,n,Set(historydomain1=${CUT(historynumber2,@,2)})
exten => s,n,Set(historydomain=${CUT(historydomain1,>,1)})
exten => s,n,System(echo “${STRFTIME(${EPOCH},%d.%m.%Y, %H:%M:%S)} - ${historyname} - ${historynumber} - ${historydomain}” >> /var/log/asterisk/Sascha-Sipvar.log)
And this is the output result in my logfile:
24.02.2017, 14:27:59 - Sascha - +58176 - sip.saschakamm.local
24.02.2017, 14:31:26 - MTA - +58661 - sip.saschakamm.local
[root@VoIPServer asterisk]#
I now have all the information needed in seperate variables to continue working with them.
Thank you for your support!
Cheers
