}
}
-my $pc90msgid = 0;
-
-sub nextpc90
-{
- $pc90msgid = 0 if $pc90msgid > 9999;
- return $pc90msgid++;
-}
-
-sub mungepc90
-{
- unless ($_[0] =~ /^PC9\d/) {
- my $id = nextpc90();
- return "PC90^$main::mycall^$id^" . $_[0];
- }
- return $_[0];
-}
-
-sub mungepc91
-{
- unless ($_[1] =~ /^PC9\d/) {
- my $id = nextpc90();
- return "PC91^$main::mycall^$id^$_[0]^" . $_[1];
- }
- return $_[1];
-}
-
#
# This is the normal pcxx despatcher
#
return;
}
- # handle PC90 frames in a special way.
- #
- # PC90 frames are normal frames that that are wrapped in inside a PC90
- # The extra fields are "originating node" and a sequence number.
- # The sequence number is checked against the nodes 'last one' to see if
- # it is a duplicate and, if so, is dropped at this stage; before any
- # other processing.
- #
- # This is done here simply for efficiency. Adding another function would
- # add more copying and so on.
- #
-
my $origin = $self->{call};
- if ($pcno >= 90) {
- $origin = $field[1];
- if ($origin eq $main::mycall) {
- dbg("PCPROT: loop dupe") if isdbg('chanerr');
- return;
- }
- $self->user->wantpc90(1) unless $self->user->wantpc90 || $origin ne $self->{call};
- my $seq = $field[2];
- my $node = Route::Node::get($origin);
- if ($node) {
- if (my $lid = $node->lid) {
- my $cmp = $seq >= $lid ? $seq : $seq + 9999;
- if ($cmp <= $lid) {
- dbg("PCPROT: sequence dupe $seq ($cmp) <= $lid") if isdbg('chanerr');
- return;
- }
- }
- $node->lid($seq);
- }
-
- # do a recheck on the contents of the PC90
- if ($pcno >= 90) {
- shift @field;
- shift @field;
- shift @field;
- $origin = shift @field if $pcno == 91;
-
- ($pcno) = $field[0] =~ /^PC(\d\d)/; # just get the number
- unless (defined $pcno && $pcno >= 10 && $pcno <= 89) {
- dbg("PCPROT: unknown protocol") if isdbg('chanerr');
- return;
- }
-
- # check for and dump bad protocol messages
- my $n = check($pcno, @field);
- if ($n) {
- dbg("PCPROT: bad field $n, dumped (" . parray($checklist[$pcno-10]) . ")") if isdbg('chanerr');
- return;
- }
- }
- } else {
- if ($pcno == 16 || $pcno == 17 || $pcno == 19 || $pcno == 21) {
- $line = mungepc91($origin, $line);
- } else {
- $line = mungepc90($line);
- }
- }
-
no strict 'subs';
my $sub = "handle_$pcno";