On Di, 2009-12-22 at 10:53 +0100, MK wrote:
> Here is my program so far:
> <snip>
Please translate comments if you post to an English list. Not everyone
speaks German.
> The start_adress and end_adress are the ip-range.
>
> For example:
> printdomains.py -s 192.168.178.0 -e 193.170.180.4
>
> This should make all ips and stop at the end_adress.
IP addresses consist of four blocks of values between 0 and 255
(inclusive). This means they can easily be translated into a hexadecimal
value: 255.255.255.0 is ff.ff.ff.00 or 0xffffff00.
Knowing this, you could simplify the problem:
each block of the start address is offset by 8 bits from the next, so we
can do something like this:
# Translate the start address blocks into integers:
start_blocks = [int(block) for block in start_address.split('.')]
# Now offset the blocks and add them together:
start = 0
for k, block in enumerate(start_blocks):
start += block << (8 * k)
# Do the same for the end address:
end_blocks = [int(block) for block in end_address.split('.')]
end = 0
for k, block in enumerate(end_blocks):
end += block << (8 * k)
# Now generate the addresses:
for ip in range(start, end+1):
blocks = []
for i in range(4):
blocks.append((ip & (0xff << (8 * i))) >> (8 * i))
print '.'.join(blocks)
Hope this helps. I haven't run this code, so you might want to make sure
it works correctly before using it.
Cheers,
Alan Plum
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