smarter match for IP address in nodes

- add 'connnected?' method to ssh/telnet to query if or not we're
  connected
- subclass OxidizedError from StandardError, all future OxidizedErrors
  should be subclasssed from this.

3 files changed, 17 insertions, 4 deletions

diff --git a/lib/oxidized/input/ssh.rb b/lib/oxidized/input/ssh.rb
index a858213..bd0a459 100644
--- a/lib/oxidized/input/ssh.rb
+++ b/lib/oxidized/input/ssh.rb
@@ -27,6 +27,10 @@ module Oxidized
         shell_open @ssh
         @username ? shell_login : expect(@node.prompt)
       end
+      connected?
+    end
+
+    def connected?
       @ssh and not @ssh.closed?
     end
 
diff --git a/lib/oxidized/input/telnet.rb b/lib/oxidized/input/telnet.rb
index 84d9877..4e80ceb 100644
--- a/lib/oxidized/input/telnet.rb
+++ b/lib/oxidized/input/telnet.rb
@@ -19,6 +19,10 @@ module Oxidized
       expect @node.prompt
     end
 
+    def connected?
+      @telnet and not @telnet.sock.closed?
+    end
+
     def cmd cmd, expect=@node.prompt
       Log.debug "Telnet: #{cmd} @#{@node.name}"
       args = { 'String' => cmd }
diff --git a/lib/oxidized/nodes.rb b/lib/oxidized/nodes.rb
index 8d49443..42c18cb 100644
--- a/lib/oxidized/nodes.rb
+++ b/lib/oxidized/nodes.rb
@@ -1,5 +1,6 @@
 module Oxidized
-  require 'oxidized/node'
+ require 'oxidized/node'
+ require 'ipaddr'
  class Oxidized::NotSupported < StandardError; end
  class Oxidized::NodeNotFound < StandardError; end
   class Nodes < Array
@@ -8,14 +9,18 @@ module Oxidized
     def load node_want=nil
       with_lock do
         new = []
+        node_want_ip = (IPaddr.new(node_want) rescue nil) if node_want
         @source = CFG.source[:default]
         Oxidized.mgr.add_source @source
         Oxidized.mgr.source[@source].new.load.each do |node|
 
-          # we want to load one specific node(s), not all of them
+          # we want to load specific node(s), not all of them
           if node_want
-            next unless node[:name].to_s.match(node_want) or
-                        node[:ip].to_s.match(node_want)
+            if node_want_ip
+              next unless node_want_ip == node[:ip]
+            else
+              next unless node[:name].match node_want
+            end
           end
 
           begin