lib/testlab/interface.rb in testlab-1.8.3 vs lib/testlab/interface.rb in testlab-1.8.4

@@ -21,26 +21,84 @@
     def initialize(*args)
       @ui = TestLab.ui
 
       @ui.logger.debug { "Loading Interface" }
       super(*args)
+
+      self.address ||= generate_ip
+      self.mac     ||= generate_mac
+
       @ui.logger.debug { "Interface '#{self.id}' Loaded" }
     end
 
+    # IP address for the interface
     def ip
       TestLab::Utility.ip(self.address)
     end
 
+    # CIDR mask for the interface
     def cidr
       TestLab::Utility.cidr(self.address)
     end
 
+    # Netmask for the interface
     def netmask
       TestLab::Utility.netmask(self.address)
     end
 
+    # PTR record for the interface
     def ptr
       TestLab::Utility.ptr(self.address)
+    end
+
+    # Generate IP address
+    #
+    # Generates an RFC compliant private IP address.
+    #
+    # @return [String] A random, private IP address in the 192.168.0.1/24
+    #   range.
+    def generate_ip
+      crc32  = Zlib.crc32(self.id.to_s)
+      offset = crc32.modulo(255)
+
+      octets = [ 192..192,
+                 168..168,
+                 0..254,
+                 1..254 ]
+      ip = Array.new
+      for x in 1..4 do
+        ip << octets[x-1].to_a[offset.modulo(octets[x-1].count)].to_s
+      end
+      "#{ip.join(".")}/24"
+    end
+
+    # Generate MAC address
+    #
+    # Generates an RFC compliant private MAC address.
+    #
+    # @return [String] A random, private MAC address.
+    def generate_mac
+      crc32  = Zlib.crc32(self.id.to_s)
+      offset = crc32.modulo(255)
+
+      digits = [ %w(0),
+                 %w(0),
+                 %w(0),
+                 %w(0),
+                 %w(5),
+                 %w(e),
+                 %w(0 1 2 3 4 5 6 7 8 9 a b c d e f),
+                 %w(0 1 2 3 4 5 6 7 8 9 a b c d e f),
+                 %w(5 6 7 8 9 a b c d e f),
+                 %w(3 4 5 6 7 8 9 a b c d e f),
+                 %w(0 1 2 3 4 5 6 7 8 9 a b c d e f),
+                 %w(0 1 2 3 4 5 6 7 8 9 a b c d e f) ]
+      mac = ""
+      for x in 1..12 do
+        mac += digits[x-1][offset.modulo(digits[x-1].count)]
+        mac += ":" if (x.modulo(2) == 0) && (x != 12)
+      end
+      mac
     end
 
   end
 
 end