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Re: Convert MAC to hex howto

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  Re: Convert MAC to hex howto MRAB <python@mrabarnett.plus.com> - 2012-10-07 21:04 +0100

#30936 — Re: Convert MAC to hex howto

On 2012-10-07 20:44, Johannes Graumann wrote:
> Dear all,
>
> I'm trying to convert
> 	'00:08:9b:ce:f5:d4'
> to
> 	'\x00\x08\x9b\xce\xf5\xd4'
> for use in magic packet construction for WakeOnLan like so:
> 	wolsocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
>         	wolsocket.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
> 	wolsocket.sendto('\xff'*6 + '\x00\x08\x9b\xce\xf5\xd4'*16,
> 	 (expectedlanbroadcast, 80))
>
> This is what I came up whith, but I remain puzzled on how to preserver the
> leading '\h' ... thanks for any hint
>
> expectedservermac = '00:08:9b:ce:f5:d4'
> hexcall = str.split(expectedservermac,":")
> hexcall.insert(0,'')
> hexcall = "\\x".join(hexcall).decode('string_escape')
>
> Thanks for any pointers.
>
It looks like you're using Python 2, so:

 >>> s = '00:08:9b:ce:f5:d4'
 >>> "".join(chr(int(x, 16)) for x in s.split(":"))
'\x00\x08\x9b\xce\xf5\xd4'

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