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|
##
# Cross platform MAC address determination. Works for:
# * /sbin/ifconfig
# * /bin/ifconfig
# * ifconfig
# * ipconfig /all
#
# To return the first MAC address on the system:
#
# Mac.address
#
# To return an array of all MAC addresses:
#
# Mac.address.list
#
#begin
# require 'rubygems'
#rescue LoadError
# nil
#end
require 'systemu'
require 'socket'
module Mac
VERSION = '1.7.2'
def Mac.version
::Mac::VERSION
end
def Mac.dependencies
{
'systemu' => [ 'systemu' , '~> 2.6.5' ]
}
end
def Mac.description
'cross platform mac address determination for ruby'
end
class << self
##
# Accessor for the system's first MAC address, requires a call to #address
# first
attr_accessor "mac_address"
##
# Discovers and returns the system's MAC addresses. Returns the first
# MAC address, and includes an accessor #list for the remaining addresses:
#
# Mac.addr # => first address
# Mac.addr.list # => all addresses
def address
return @mac_address if defined? @mac_address and @mac_address
@mac_address = from_getifaddrs
return @mac_address if @mac_address
cmds = '/sbin/ifconfig', '/bin/ifconfig', 'ifconfig', 'ipconfig /all', 'cat /sys/class/net/*/address'
output = nil
cmds.each do |cmd|
_, stdout, _ = systemu(cmd) rescue next
next unless stdout and stdout.size > 0
output = stdout and break
end
raise "all of #{ cmds.join ' ' } failed" unless output
@mac_address = parse(output)
end
link = Socket::PF_LINK if Socket.const_defined? :PF_LINK
packet = Socket::PF_PACKET if Socket.const_defined? :PF_PACKET
INTERFACE_PACKET_FAMILY = link || packet # :nodoc:
def from_getifaddrs
return unless Socket.respond_to? :getifaddrs
interfaces = Socket.getifaddrs.select do |addr|
if addr.addr # Some VPN ifcs don't have an addr - ignore them
addr.addr.pfamily == INTERFACE_PACKET_FAMILY
end
end
mac, =
if Socket.const_defined? :PF_LINK then
interfaces.map do |addr|
addr.addr.getnameinfo
end.find do |m,|
!m.empty?
end
elsif Socket.const_defined? :PF_PACKET then
interfaces.map do |addr|
addr.addr.inspect_sockaddr[/hwaddr=([\h:]+)/, 1]
end.find do |mac_addr|
mac_addr != '00:00:00:00:00:00'
end
end
@mac_address = mac if mac
end
def parse(output)
lines = output.split(/\n/)
candidates = lines.select{|line| line =~ RE}
raise 'no mac address candidates' unless candidates.first
candidates.map!{|c| c[RE].strip}
maddr = candidates.first
raise 'no mac address found' unless maddr
maddr.strip!
maddr.instance_eval{ @list = candidates; def list() @list end }
maddr
end
##
# Shorter alias for #address
alias_method "addr", "address"
end
RE = %r/(?:[^:\-]|\A)(?:[0-9A-F][0-9A-F][:\-]){5}[0-9A-F][0-9A-F](?:[^:\-]|\Z)/io
end
MacAddr = Macaddr = Mac
|
