From 540baef644ae843bf44c36c5149a1d095a9a039a Mon Sep 17 00:00:00 2001
From: Steve Kemp <steve@steve.org.uk>
Date: Tue, 20 Nov 2012 10:01:57 +0000
Subject:   Removed DNS lookup

---
 lib/custodian/alerter.rb | 70 ++++++------------------------------------------
 1 file changed, 8 insertions(+), 62 deletions(-)

diff --git a/lib/custodian/alerter.rb b/lib/custodian/alerter.rb
index 6ac4fe5..e70ad0d 100644
--- a/lib/custodian/alerter.rb
+++ b/lib/custodian/alerter.rb
@@ -1,10 +1,11 @@
 
+require 'custodian/dnsutil'
 
 require 'mauve/sender'
 require 'mauve/proto'
 
+
 require 'ipaddr'
-require 'socket'
 
 
 
@@ -27,27 +28,6 @@ class Alerter
   end
 
 
-  #
-  # Return the reverse DNS for the specified IP address, nil on failure.
-  #
-  def resolve_ip( target )
-    resolved = nil
-    begin
-      timeout( 4 ) do
-        begin
-          Socket.getaddrinfo(target, 'echo').each do |a|
-            resolved = a[2] if ( a )
-          end
-        rescue SocketError
-          resolved = nil
-        end
-      end
-    rescue Timeout::Error => e
-      resolved = nil
-    end
-    resolved
-  end
-
 
 
 
@@ -75,22 +55,10 @@ class Alerter
          ( target =~ /^([0-9a-f:]+)$/ ) )
       resolved = target
     else
-      begin
-        timeout( 4 ) do
-
-          begin
-            Socket.getaddrinfo(target, 'echo').each do |a|
-              resolved = a[3] if ( a )
-            end
-          rescue SocketError
-            resolved = nil
-          end
-        end
-      rescue Timeout::Error => e
-        resolved = nil
-      end
+      resolved = DNSUtil.hostname_to_ip( target )
     end
 
+
     #
     # Did we get an error?
     #
@@ -130,28 +98,6 @@ class Alerter
   end
 
 
-  #
-  # Resolve an IP address
-  #
-  def document_address( address )
-
-    raise ArgumentError, "Address must not be nil" if ( address.nil? )
-
-    begin
-      timeout( 4 ) do
-        begin
-          Resolv.new.getname(address)
-        rescue
-          nil
-        end
-      end
-    rescue Timeout::Error => e
-      resolved = nil
-    end
-  end
-
-
-
   #
   # Raise the alert.
   #
@@ -171,7 +117,7 @@ class Alerter
     subject = @details['target_host']
     if ( ( subject =~ /^([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)$/ ) ||
          ( subject =~ /^([0-9a-f:]+)$/ ) )
-      res = resolve_ip( subject )
+      res = DNSUtil.ip_to_hostname( subject )
 
       if ( res )
         subject = "#{subject} [#{res}]"
@@ -187,7 +133,7 @@ class Alerter
     if ( ( @details["target_host"] =~ /^([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)$/ ) ||
          ( @details["target_host"] =~ /^([0-9a-f:]+)$/ ) )
 
-      resolved = document_address( @details["target_host"] )
+      resolved = DNSUtil.ip_to_hostname( @details["target_host"] )
       if ( resolved.nil? )
         resolved = ""
       else
@@ -237,7 +183,7 @@ class Alerter
     subject = @details['target_host']
     if ( ( subject =~ /^([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)$/ ) ||
          ( subject =~ /^([0-9a-f:]+)$/ ) )
-      res = resolve_ip( subject )
+      res = DNSUtil.ip_to_hostname( subject )
 
       if ( res )
         subject = "#{subject} [#{res}]"
@@ -252,7 +198,7 @@ class Alerter
     if ( ( @details["target_host"] =~ /^([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)$/ ) ||
          ( @details["target_host"] =~ /^([0-9a-f:]+)$/ ) )
 
-      resolved = document_address( @details["target_host"] )
+      resolved = DNSUtil.ip_to_hostname( @details["target_host"] )
       if ( resolved.nil? )
         resolved = ""
       else
-- 
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