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1 | cf51ea5b | Dimitris Aragiorgis | #!/usr/bin/env python |
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2 | cf51ea5b | Dimitris Aragiorgis | |
3 | cf51ea5b | Dimitris Aragiorgis | import sys |
4 | cf51ea5b | Dimitris Aragiorgis | |
5 | cf51ea5b | Dimitris Aragiorgis | from IPy import IP |
6 | cf51ea5b | Dimitris Aragiorgis | |
7 | cf51ea5b | Dimitris Aragiorgis | if len(sys.argv) != 3: |
8 | cf51ea5b | Dimitris Aragiorgis | sys.stderr.write("Usage: %s <mac_address> <IPv6 prefix>\n" % sys.argv[0]) |
9 | cf51ea5b | Dimitris Aragiorgis | sys.exit(127) |
10 | cf51ea5b | Dimitris Aragiorgis | |
11 | cf51ea5b | Dimitris Aragiorgis | mac = sys.argv[1] |
12 | cf51ea5b | Dimitris Aragiorgis | try: |
13 | cf51ea5b | Dimitris Aragiorgis | prefix = IP(sys.argv[2]) |
14 | cf51ea5b | Dimitris Aragiorgis | except ValueError: |
15 | cf51ea5b | Dimitris Aragiorgis | sys.stderr.write("Invalid IPv6 prefix '%s'\n" % sys.argv[2]) |
16 | cf51ea5b | Dimitris Aragiorgis | sys.exit(1) |
17 | cf51ea5b | Dimitris Aragiorgis | |
18 | cf51ea5b | Dimitris Aragiorgis | |
19 | cf51ea5b | Dimitris Aragiorgis | if prefix.version() != 6: |
20 | cf51ea5b | Dimitris Aragiorgis | sys.stderr.write("%s is not a valid IPv6 prefix\n" % prefix) |
21 | cf51ea5b | Dimitris Aragiorgis | sys.exit(1) |
22 | cf51ea5b | Dimitris Aragiorgis | |
23 | cf51ea5b | Dimitris Aragiorgis | if prefix.prefixlen() != 64: |
24 | cf51ea5b | Dimitris Aragiorgis | sys.stderr.write("Cannot generate an EUI-64 address on a non-64 subnet\n") |
25 | cf51ea5b | Dimitris Aragiorgis | sys.exit(1) |
26 | cf51ea5b | Dimitris Aragiorgis | |
27 | cf51ea5b | Dimitris Aragiorgis | mac_parts = mac.split(":") |
28 | cf51ea5b | Dimitris Aragiorgis | pfx_parts = prefix.net().strFullsize().split(":") |
29 | cf51ea5b | Dimitris Aragiorgis | |
30 | cf51ea5b | Dimitris Aragiorgis | if len(mac_parts) != 6: |
31 | cf51ea5b | Dimitris Aragiorgis | sys.stderr.write("%s is not a valid MAC-48 address\n" % mac) |
32 | cf51ea5b | Dimitris Aragiorgis | sys.exit(1) |
33 | cf51ea5b | Dimitris Aragiorgis | |
34 | cf51ea5b | Dimitris Aragiorgis | eui64 = mac_parts[:3] + [ "ff", "fe" ] + mac_parts[3:] |
35 | cf51ea5b | Dimitris Aragiorgis | |
36 | cf51ea5b | Dimitris Aragiorgis | eui64[0] = "%02x" % (int(eui64[0], 16) ^ 0x02) |
37 | cf51ea5b | Dimitris Aragiorgis | |
38 | cf51ea5b | Dimitris Aragiorgis | ip = ":".join(pfx_parts[:4]) |
39 | cf51ea5b | Dimitris Aragiorgis | for l in range(0, len(eui64), 2): |
40 | cf51ea5b | Dimitris Aragiorgis | ip += ":%s" % "".join(eui64[l:l+2]) |
41 | cf51ea5b | Dimitris Aragiorgis | |
42 | cf51ea5b | Dimitris Aragiorgis | try: |
43 | cf51ea5b | Dimitris Aragiorgis | print IP(ip).strCompressed() |
44 | cf51ea5b | Dimitris Aragiorgis | except ValueError, e: |
45 | cf51ea5b | Dimitris Aragiorgis | sys.stderr.write("Ooops, something went wrong: '%s'!\n" % str(e)) |
46 | cf51ea5b | Dimitris Aragiorgis | |
47 | cf51ea5b | Dimitris Aragiorgis | # vim: set ts=4 sts=4 sw=4 et ai : |