#
# Copyright (c) 2011, EPFL (Ecole Politechnique Federale de Lausanne)
# All rights reserved.
#
# Created by Marco Canini, Daniele Venzano, Dejan Kostic, Jennifer Rexford
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   -  Redistributions of source code must retain the above copyright notice,
#      this list of conditions and the following disclaimer.
#   -  Redistributions in binary form must reproduce the above copyright notice,
#      this list of conditions and the following disclaimer in the documentation
#      and/or other materials provided with the distribution.
#   -  Neither the names of the contributors, nor their associated universities or
#      organizations may be used to endorse or promote products derived from this
#      software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
# SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

import struct
import utils

class MacAddress:
	def __init__(self, value=(0, 0, 0, 0, 0, 0)):
		if isinstance(value, type("")):
			octets = value.split(":")
			octets = map(lambda x: int(x, 16), octets)
			value = octets
		elif isinstance(value, tuple):
			pass
		elif isinstance(value, MacAddress):
			value = value.data
		else:
			import pdb; pdb.set_trace()
			utils.crash("Creating a MacAddress from something unknown")
		self.data = tuple(map(lambda x: x, value))

	def tostring(self):
		return struct.pack("BBBBBB", *self.data)

	def toint(self):
		return self.data[0] << 40 | self.data[1] << 32 | self.data[2] <<  24 | self.data[3] << 16 | self.data[4] << 8 | self.data[5]

	def __iter__(self):
		return self.data.__iter__()

	def __repr__(self):
		s = "%02x:%02x:%02x:%02x:%02x:%02x" % self.data
		return s

	def __eq__(self, other):
		if isinstance(other, MacAddress):
			return self.data == other.data
		elif isinstance(other, tuple):
			return self.data == other
		else:
			raise NotImplementedError

	def __ne__(self, other):
		if isinstance(other, MacAddress):
			return self.data != other.data
		elif isinstance(other, type(None)):
			return True
		elif isinstance(other, tuple):
			return self.data != other
		else:
			raise NotImplementedError

	def __lt__(self, other):
		return self.data < other.data

	def __rshift__(self, other):
		return self.toint() >> other

	def __and__(self, other):
		return self.toint() & other

	def __mod__(self, other):
		return self.toint() % other

	def __hash__(self):
		return hash(self.data)

	def copy(self):
		return MacAddress(self)

	def __getstate__(self):
		return {"data": self.data[:] }

