From 4d030e8c3c0f289de8471b91bc6b789592254b46 Mon Sep 17 00:00:00 2001
From: Stig Thormodsrud <stig@io.vyatta.com>
Date: Fri, 13 Feb 2009 15:22:10 -0800
Subject: Cache exists() to reduce calls to external /usr/sbin/ipset.

---
 lib/Vyatta/IpTables/IpSet.pm | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'lib/Vyatta')

diff --git a/lib/Vyatta/IpTables/IpSet.pm b/lib/Vyatta/IpTables/IpSet.pm
index e38e731..1f8e25b 100755
--- a/lib/Vyatta/IpTables/IpSet.pm
+++ b/lib/Vyatta/IpTables/IpSet.pm
@@ -34,9 +34,10 @@ use strict;
 use warnings;
 
 my %fields = (
-    _name  => undef,
-    _type  => undef,  # vyatta group type, not ipset type
-    _debug => undef,
+    _name   => undef,
+    _type   => undef,  # vyatta group type, not ipset type
+    _exists => undef,
+    _debug  => undef,
 );
 
 my %grouptype_hash = (
@@ -71,11 +72,13 @@ sub debug {
 sub exists {
     my ($self) = @_;
 
+    return 1 if defined $self->{_exists};
     return 0 if ! defined $self->{_name};
     my $func = (caller(0))[3];
     my $cmd = "ipset -L $self->{_name}";
     my $rc = system("$cmd > /dev/null &>2");
     system("$logger [$func] [$cmd] = [$rc]") if defined $self->{_debug};
+    $self->{_exists} = 1 if $rc eq 0;
     return $rc ? 0 : 1;
 }
 
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