dns-forwarding op-mode commands:

'clear dns forwarding cache'
'show dns forwarding statistics'

1 files changed, 117 insertions, 0 deletions

diff --git a/scripts/vyatta-op-dns-forwarding.pl b/scripts/vyatta-op-dns-forwarding.pl
new file mode 100644
index 0000000..d23ae7f
--- /dev/null
+++ b/scripts/vyatta-op-dns-forwarding.pl
@@ -0,0 +1,117 @@
+#!/usr/bin/perl
+#
+# Module: vyatta-op-dns-forwarding.pl
+#
+# **** License ****
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# This code was originally developed by Vyatta, Inc.
+# Portions created by Vyatta are Copyright (C) 2008 Vyatta, Inc.
+# All Rights Reserved.
+#
+# Author: Mohit Mehta
+# Date: August 2008
+# Description: Script to execute op-mode commands for DNS forwarding
+#
+# **** End License ****
+#
+
+use lib "/opt/vyatta/share/perl5/";
+use Getopt::Long;
+use VyattaConfig;
+use strict;
+use warnings;
+
+my $show_stats_output="";
+my $show_nameservers_output="";
+my $dnsmasq_log='/var/log/dnsmasq.log';
+
+sub get_cache_stats {
+    my ($cache_size, $queries_forwarded, $queries_answered_locally, $entries_inserted, $entries_removed);
+
+    my $grepped_line = `grep 'cache size' $dnsmasq_log`;
+    my @split_line = split(/\s+/, $grepped_line);
+    my @temp_split = split(/,/, $split_line[6]);
+    $cache_size = $temp_split[0];
+    @temp_split = split(/\//, $split_line[7]);
+    $entries_removed = $temp_split[0];
+    $entries_inserted = $temp_split[1];
+
+    $grepped_line = `grep 'queries forwarded' $dnsmasq_log`;
+    @split_line = split(/\s+/, $grepped_line);
+    @temp_split = split(/,/, $split_line[6]);
+    $queries_forwarded = $temp_split[0];
+    $queries_answered_locally = $split_line[10];
+
+    $show_stats_output .= "----------------\n";
+    $show_stats_output .= "Cache statistics\n";
+    $show_stats_output .= "----------------\n";
+    $show_stats_output .= "Cache size: $cache_size\n";
+    $show_stats_output .= "Queries forwarded: $queries_forwarded\n";
+    $show_stats_output .= "Queries answered locally: $queries_answered_locally\n";
+    $show_stats_output .= "Total DNS entries inserted into cache: $entries_inserted\n";
+    $show_stats_output .= "DNS entries removed from cache before expiry: $entries_removed\n";
+
+}
+
+sub get_nameserver_stats {
+
+    $show_stats_output .= "\n---------------------\n";
+    $show_stats_output .= "Nameserver statistics\n";
+    $show_stats_output .= "---------------------\n";
+
+    my @grepped_lines = `grep 'server' $dnsmasq_log`;
+
+    foreach my $lines (@grepped_lines) {
+            my @each_line = split(/\s+/, $lines);
+            my $nameserver_word = $each_line[5];
+            my @nameserver_split = split(/#/, $nameserver_word);
+            my $nameserver = $nameserver_split[0];
+            my $queries_sent_word = $each_line[8];
+            my @queries_sent_split = split(/,/, $queries_sent_word);
+            my $queries_sent = $queries_sent_split[0];
+            my $queries_retried_failed = $each_line[12];
+
+            $show_stats_output .= "Server: $nameserver\nQueries sent: $queries_sent\nQueries retried or failed: $queries_retried_failed\n\n";
+
+    }
+}
+
+sub print_stats {
+    print $show_stats_output;
+}
+
+#
+# main
+#
+my ($clear_cache, $show_statistics, $show_nameservers);
+
+GetOptions("clear-cache!"               => \$clear_cache,
+           "show-statistics!"           => \$show_statistics,
+           "show-nameservers!"          => \$show_nameservers);
+
+if (defined $clear_cache) {
+    system("kill -1 `pidof dnsmasq`");
+}
+
+if (defined $show_statistics) {
+    system("echo > /var/log/dnsmasq.log; kill -10 `pidof dnsmasq`");
+    get_cache_stats;
+    get_nameserver_stats;
+    print_stats;
+}
+
+if (defined $show_nameservers) {
+
+}
+
+exit 0;
+
+# end of file