Fix crash on sending an invalid rcmd

[spider.git] / perl / DXChannel.pm

diff --git a/perl/DXChannel.pm b/perl/DXChannel.pm
index 7d340a6165f5cfde293b725b28efea2edf9c95b7..fcc230aa324b25238535084697d473b1cfdf60a1 100644 (file)
--- a/perl/DXChannel.pm
+++ b/perl/DXChannel.pm
@@ -35,7 +35,7 @@ use Prefix;
 use Route;
 
 use strict;
-use vars qw(%channels %valid @ISA $count);
+use vars qw(%channels %valid @ISA $count $maxerrors);
 
 %channels = ();
 $count = 0;
@@ -125,6 +125,8 @@ $count = 0;
                  next_pc92_keepalive => '9,Next PC92 KeepAlive,atime',
                 );
 
+$maxerrors = 20;                               # the maximum number of concurrent errors allowed before disconnection
+
 # object destruction
 sub DESTROY
 {
@@ -177,6 +179,22 @@ sub alloc
        return $channels{$call} = $self;
 }
 
+# count errors and disconnect if too many
+# this has to be here because it can come from rcmd (DXProt) as
+# well as DXCommandmode.
+sub _error_out
+{
+       my $self = shift;
+       my $e = shift;
+       if (++$self->{errors} > $maxerrors) {
+               $self->send($self->msg('e26'));
+               $self->disconnect;
+               return ();
+       } else {
+               return ($self->msg($e));
+       }
+}
+
 # rebless this channel as something else
 sub rebless
 {