Channel Check · May 16, 08:55 by Shannon Wynter

Update: Shortly after showing this to some asterisk people (the same ones I asked last night for assistance in this matter) they showed me an easier way Snippits / Channel Check 2.0

The code below still perfectly usefull if you want to check more then a few extensions.

I can’t belive that this isn’t built into Asterisk – I can’t possibly be the only person in the world that wants to be able to ring multipul extensions except when one is busy (not just off hook)

It took some hunting around, and a great deal of source searching but I’ve done it.

First I need to get a list of open channels in order to work out which ones are busy

This is a library file, I keep it in /var/lib/asterisk/perl/apps/lib

1. sub get_chanlist {
2. # Open a purely random file...
3. open(TMP, "+>", undef) or die($!);
4. # Fill it  up with data
5. $meh = asterisk_chanlist(fileno(TMP));
6. # GO back to start of file
7. seek(TMP,0,0);
8.  
9. # I'm being slack here, load it all (No biggy, only 2 lines after all)
10. my @Returned = <TMP>;
11. close(TMP);
12.  
13. # Get the list of field names from the first record
14. my @Keys = ($Returned[0] =~ /^\s+(\S+)\s+\(\s*(\S+)\s+(\S+)\s+(\S+)\s*\)\s+(\S+)\s+(\S+).\s+(\S.+)\r?\n/);
15.  
16. shift(@Returned); pop(@Returned); # We don't want the first or last record
17.  
18. my @Records = ();
19.  
20. foreach $Record (@Returned) {
21.   if (@Row = ($Record =~ /^\s+(\S+)\s+\(\s*(\S+)\s+(\S+)\s+(\S+)\s*\)\s+(\S+)\s+(\S+)\s+(\S.+)\r?\n/)) {
22.   my %hash;
23.   @hash{@Keys} = @Row;
24.   push(@Records, \%hash);
25.   }
26.     }
27.  
28. return @Records;
29. }
30.  
31. 1;
32. Download this code: get_chanlist.pl (Downloaded 30 time(s))

Then we have the res_perl application “chancheck.pl” (Yeh, I probably should renabe it to something more specific)

1. package Asterisk::Embed;
2.  
3. push(@INC,"/var/lib/asterisk/perl/apps/lib");
4.  
5. require("get_chanlist.pl");
6.  
7. sub {
8. my $chan_name = shift;
9. my $chan = asterisk_get_channel_by_name($chan_name);
10. my @chans = split(/\&/,shift);
11.  
12. asterisk_log("LOG_NOTICE","chancheck.pl: Checking for busy extensions (".join(', ',@chans).")\n");
13.  
14. my @Channels = &get_chanlist();
15.  
16. my $inUse = 0;
17. foreach $Chan (@Channels) {
18.   foreach $CheckChan (@chans) {
19.   if ($Chan->{Channel} =~ /^\Q$CheckChan\E/i) {
20.     $inUse++;
21.   }
22.   }
23. }
24.  
25. if ($inUse > 0) {
26.   asterisk_log("LOG_NOTICE","chancheck.pl: Found busy extensions\n");
27.   asterisk_setvariable($chan,'CHANCHECK','BUSY');
28. } else {
29.   asterisk_log("LOG_NOTICE","chancheck.pl: All extensions free\n");
30.   asterisk_setvariable($chan,'CHANCHECK','AVAIL');
31. }
32. }
33.  
34. Download this code: chancheck.pl (Downloaded 26 time(s))

You call this function with the same params you call your dial() with
ie: tech/ext&tech/ext&tech/ext etc

Sample code:

1. IPDial=sip/9100&sip/9101
2. IPVoicemail=9100@default
3.  
4. ; Tell our user to hold
5. exten => s,1,Playback(pls-wait-connect-call)
6. ; Check our lines (sip/9100&sip/9101)
7. exten => s,2,Perl(LoadFile:chancheck.pl:${IPDial})
8. exten => s,3,Goto(${CHANCHECK},s,1);
9.  
10. [AVAIL] ; $CHANCHECK
11. ; Dial the extensions - we use music on hold here
12. exten => s,1,Dial(${IPDial},30,tm(default)hH)
13. exten => s,2,goto(${DIALSTATUS},s,2)
14.  
15. [BUSY] ; $CHANCHECK & $DIALSTATUS
16. exten => s,1,Playback(the-party-you-are-calling)
17. exten => s,2,Playback(vm-isonphone)
18. exten => s,3,Goto(LEAVEAMSG,s,1)
19.  
20. [CHANUNAVAIL] ; $DIALSTATUS
21. exten => s,1,NoOp
22. exten => s,2,Playback(cannot-complete-temp-error)
23. exten => s,3,Goto(LEAVEAMSG,s,1)
24.  
25. [NOANSWER] ; $DIALSTATUS
26. exten => s,1,Playback(away-naughty-boy)
27. exten => s,2,Goto(LEAVEAMSG,s,1)
28.  
29. [LEAVEAMSG]
30. exten => s,1,DigitTimeout,5
31. exten => s,2,ResponseTimeout,10
32. exten => s,3,Background(T-to-leave-msg)
33. exten => s,4,Background(press-1)
34.  
35. ; Press 1
36. exten => 1,1,Voicemail(${IPVoicemail})
37.  
38. ; Timeout - If they take too long, give up
39. exten => t,1,Playback(thank-you-for-calling)
40. exten => t,2,Playback(goodbye)
41. exten => t,3,Wait(2) ; Sometimes goodbye gets cut off
42. exten => t,4,Hangup
43.  
44. exten => i,1,Playback(invalid) ; "That's not valid, try again"
45.  
46. Download this code: chancheck.conf (Downloaded 28 time(s))

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