[266] erikh@highland ~mine/sysinfo% ruby -rpp -rubygems -e 'require "sysinfo"; pp SysInfo.getifaddrs'    [r: ruby-1.8.7-p302][23:37]
{"stf0"=>{},
 "vmnet1"=>
  {"ipv4"=>
    [{"netmask"=>"255.255.255.0",
      "address"=>"192.168.117.1",
      "broadcast"=>"192.168.117.255",
      "dst_address"=>"192.168.117.255"}]},
 "lo0"=>
  {"ipv4"=>
    [{"netmask"=>"255.0.0.0",
      "address"=>"127.0.0.1",
      "broadcast"=>"127.0.0.1",
      "dst_address"=>"127.0.0.1"}],
   "ipv6"=>
    [{"netmask"=>"ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",
      "address"=>"::1",
      "broadcast"=>"::1",
      "dst_address"=>"::1"},
     {"netmask"=>"ffff:ffff:ffff:ffff::",
      "address"=>"fe80::1%lo0",
      "broadcast"=>"ffff:ffff:ffff:ffff::",
      "dst_address"=>"ffff:ffff:ffff:ffff::"}]},
 "gif0"=>{},
 "en0"=>{},
 "en1"=>
  {"ipv4"=>
    [{"netmask"=>"255.255.255.0",
      "address"=>"10.0.1.2",
      "broadcast"=>"10.0.1.255",
      "dst_address"=>"10.0.1.255"}],
   "ipv6"=>
    [{"netmask"=>"ffff:ffff:ffff:ffff::",
      "address"=>"fe80::5ab0:35ff:fe62:27ac%en1"}]},
 "vmnet8"=>
  {"ipv4"=>
    [{"netmask"=>"255.255.255.0",
      "address"=>"172.16.133.1",
      "broadcast"=>"172.16.133.255",
      "dst_address"=>"172.16.133.255"}]},
 "fw0"=>{}}