| # Copyright (c) 2013 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| |
| def inet_hwton(hw_addr): |
| """Converts a representation of an Ethernet address to its packed format. |
| |
| @param hw_addr: A string representing an Ethernet address in hex format like |
| "BA:C0:11:C0:FF:EE", "BAC011C0FFEE" or already in its binary representation. |
| @return: The 6-byte binary form of the provided Ethernet address. |
| """ |
| if len(hw_addr) == 6: # Already in network format. |
| return hw_addr |
| if len(hw_addr) == 12: # Hex format without : in between. |
| return ''.join(chr(int(hw_addr[i:i + 2], 16)) for i in range(0, 12, 2)) |
| if len(hw_addr) == 17: # Hex format with : in between. |
| return ''.join(chr(int(hw_addr[i:i + 2], 16)) for i in range(0, 17, 3)) |
| |
| |
| def inet_ntohw(packed_hw_addr): |
| """Converts a binary packed Ethernet address to its hex representation. |
| |
| @param packed_hw_addr: The 6-byte binary form of the provided Ethernet |
| address. |
| @return: The hex representation as in "AA:BB:CC:00:11:22". |
| """ |
| return '%.2X:%.2X:%.2X:%.2X:%.2X:%.2X' % tuple(map(ord, packed_hw_addr)) |
