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/Documentation/networking/cxacru-cf.py

https://gitlab.com/vibisreenivasan/UML
Python | 48 lines | 16 code | 5 blank | 27 comment | 3 complexity | a033409726d7605a3a384f57d16d2ef1 MD5 | raw file
 1#!/usr/bin/env python
 2# Copyright 2009 Simon Arlott
 3#
 4# This program is free software; you can redistribute it and/or modify it
 5# under the terms of the GNU General Public License as published by the Free
 6# Software Foundation; either version 2 of the License, or (at your option)
 7# any later version.
 8#
 9# This program is distributed in the hope that it will be useful, but WITHOUT
10# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12# more details.
13#
14# You should have received a copy of the GNU General Public License along with
15# this program; if not, write to the Free Software Foundation, Inc., 59
16# Temple Place - Suite 330, Boston, MA  02111-1307, USA.
17#
18# Usage: cxacru-cf.py < cxacru-cf.bin
19# Output: values string suitable for the sysfs adsl_config attribute
20#
21# Warning: cxacru-cf.bin with MD5 hash cdbac2689969d5ed5d4850f117702110
22# contains mis-aligned values which will stop the modem from being able
23# to make a connection. If the first and last two bytes are removed then
24# the values become valid, but the modulation will be forced to ANSI
25# T1.413 only which may not be appropriate.
26#
27# The original binary format is a packed list of le32 values.
28
29import sys
30import struct
31
32i = 0
33while True:
34	buf = sys.stdin.read(4)
35
36	if len(buf) == 0:
37		break
38	elif len(buf) != 4:
39		sys.stdout.write("\n")
40		sys.stderr.write("Error: read {0} not 4 bytes\n".format(len(buf)))
41		sys.exit(1)
42
43	if i > 0:
44		sys.stdout.write(" ")
45	sys.stdout.write("{0:x}={1}".format(i, struct.unpack("<I", buf)[0]))
46	i += 1
47
48sys.stdout.write("\n")