fd7723eaa1
Signed-off-by: Can Zhang <can@canx.me> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
import struct
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def ipv4_arg_to_bin(w, x, y, z):
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"""Generate unsigned int from components of IP address
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returns: w << 24 | x << 16 | y << 8 | z"""
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return (w << 24) | (x << 16) | (y << 8) | z
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def ipv4_to_bin(ip):
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'''
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Parse an IP address and return an unsigned int.
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The IP address is in dotted decimal notation.
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'''
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args = [int(arg) for arg in ip.split('.')]
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return ipv4_arg_to_bin(*args)
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def ipv4_to_str(ip):
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"""Generate IP address string from an unsigned int.
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ip: unsigned int of form w << 24 | x << 16 | y << 8 | z
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returns: ip address string w.x.y.z"""
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w = (ip >> 24) & 0xff
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x = (ip >> 16) & 0xff
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y = (ip >> 8) & 0xff
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z = ip & 0xff
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return "%i.%i.%i.%i" % (w, x, y, z)
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IPV6_PACK_STR = '!8H'
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def ipv6_to_arg_list(ipv6):
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'''
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convert ipv6 string to a list of 8 different parts
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'''
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args = []
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if '::' in ipv6:
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h, t = ipv6.split('::')
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h_list = [int(x, 16) for x in h.split(':')]
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t_list = [int(x, 16) for x in t.split(':')]
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args += h_list
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zero = [0]
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args += ((8 - len(h_list) - len(t_list)) * zero)
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args += t_list
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else:
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args = [int(x, 16) for x in ipv6.split(':')]
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return args
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def ipv6_to_bin(ipv6):
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'''
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convert ipv6 string to binary representation
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'''
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args = ipv6_to_arg_list(ipv6)
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return struct.pack(IPV6_PACK_STR, *args)
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def ipv6_to_str(bin_addr):
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'''
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convert binary representation to human readable string
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'''
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args = struct.unpack_from(IPV6_PACK_STR, bin_addr)
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return ':'.join('%x' % x for x in args)
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