8 sys.stderr.write("Usage: %s <mac_address> <IPv6 prefix>\n" % sys.argv[0])
13 prefix = IP(sys.argv[2])
15 sys.stderr.write("Invalid IPv6 prefix '%s'\n" % sys.argv[2])
19 if prefix.version() != 6:
20 sys.stderr.write("%s is not a valid IPv6 prefix\n" % prefix)
23 if prefix.prefixlen() != 64:
24 sys.stderr.write("Cannot generate an EUI-64 address on a non-64 subnet\n")
27 mac_parts = mac.split(":")
28 pfx_parts = prefix.net().strFullsize().split(":")
30 if len(mac_parts) != 6:
31 sys.stderr.write("%s is not a valid MAC-48 address\n" % mac)
34 eui64 = mac_parts[:3] + [ "ff", "fe" ] + mac_parts[3:]
36 eui64[0] = "%02x" % (int(eui64[0], 16) ^ 0x02)
38 ip = ":".join(pfx_parts[:4])
39 for l in range(0, len(eui64), 2):
40 ip += ":%s" % "".join(eui64[l:l+2])
43 print IP(ip).strCompressed()
45 sys.stderr.write("Ooops, something went wrong: '%s'!\n" % str(e))
47 # vim: set ts=4 sts=4 sw=4 et ai :