/usr/share/pyshared/ipcalc.py is in python-ipcalc 0.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 | # IP subnet calculator
# (C) 2007 Wijnand 'tehmaze' Modderman - http://tehmaze.com
# BSD License
#
# ABOUT
# This module allows you to perform network calculations.
#
# CHANGELOG
# 2009-03-23: Added IPv4 short-hand form support, thanks to VeXocide.
# 2007-10-26: Added IPv6 support, as well as a lot of other functions,
# refactored the calculations.
# 2007-10-25: Initial writeup, because I could not find any other workable
# implementation.
#
# TODO
# * add CLI parser
#
# REFERENCES
# * http://www.estoile.com/links/ipv6.pdf
# * http://www.iana.org/assignments/ipv4-address-space
# * http://www.iana.org/assignments/multicast-addresses
# * http://www.iana.org/assignments/ipv6-address-space
# * http://www.iana.org/assignments/ipv6-tla-assignments
# * http://www.iana.org/assignments/ipv6-multicast-addresses
# * http://www.iana.org/assignments/ipv6-anycast-addresses
#
# THANKS (testing, tips)
# * Bastiaan (trbs)
# * Peter van Dijk (Habbie)
# * Hans van Kranenburg (Knorrie)
# * Jeroen Habraken (VeXocide)
#
__version__ = '0.3'
import types, socket
class IP(object):
'''
Represents a single IP address.
>>> localhost = IP("127.0.0.1")
>>> print localhost
127.0.0.1
>>> localhost6 = IP("::1")
>>> print localhost6
0000:0000:0000:0000:0000:0000:0000:0001
'''
# Hex-to-Bin conversion masks
_bitmask = {
'0': '0000', '1': '0001', '2': '0010', '3': '0011',
'4': '0100', '5': '0101', '6': '0110', '7': '0111',
'8': '1000', '9': '1001', 'a': '1010', 'b': '1011',
'c': '1100', 'd': '1101', 'e': '1110', 'f': '1111'
}
# IP range specific information, see IANA allocations.
_range = {
4: {
'01' : 'CLASS A',
'10' : 'CLASS B',
'110' : 'CLASS C',
'1110' : 'CLASS D MULTICAST',
'11100000' : 'CLASS D LINKLOCAL',
'1111' : 'CLASS E',
'00001010' : 'PRIVATE RFC1918', # 10/8
'101011000001' : 'PRIVATE RFC1918', # 172.16/12
'1100000010101000' : 'PRIVATE RFC1918', # 192.168/16
},
6: {
'00000000' : 'RESERVED', # ::/8
'00000001' : 'UNASSIGNED', # 100::/8
'0000001' : 'NSAP', # 200::/7
'0000010' : 'IPX', # 400::/7
'0000011' : 'UNASSIGNED', # 600::/7
'00001' : 'UNASSIGNED', # 800::/5
'0001' : 'UNASSIGNED', # 1000::/4
'0010000000000000' : 'RESERVED', # 2000::/16 Reserved
'0010000000000001' : 'ASSIGNABLE', # 2001::/16 Sub-TLA Assignments [RFC2450]
'00100000000000010000000': 'ASSIGNABLE IANA', # 2001:0000::/29 - 2001:01F8::/29 IANA
'00100000000000010000001': 'ASSIGNABLE APNIC', # 2001:0200::/29 - 2001:03F8::/29 APNIC
'00100000000000010000010': 'ASSIGNABLE ARIN', # 2001:0400::/29 - 2001:05F8::/29 ARIN
'00100000000000010000011': 'ASSIGNABLE RIPE', # 2001:0600::/29 - 2001:07F8::/29 RIPE NCC
'0010000000000010' : '6TO4', # 2002::/16 "6to4" [RFC3056]
'0011111111111110' : '6BONE TEST', # 3ffe::/16 6bone Testing [RFC2471]
'0011111111111111' : 'RESERVED', # 3fff::/16 Reserved
'010' : 'GLOBAL-UNICAST', # 4000::/3
'011' : 'UNASSIGNED', # 6000::/3
'100' : 'GEO-UNICAST', # 8000::/3
'101' : 'UNASSIGNED', # a000::/3
'110' : 'UNASSIGNED', # c000::/3
'1110' : 'UNASSIGNED', # e000::/4
'11110' : 'UNASSIGNED', # f000::/5
'111110' : 'UNASSIGNED', # f800::/6
'1111110' : 'UNASSIGNED', # fc00::/7
'111111100' : 'UNASSIGNED', # fe00::/9
'1111111010' : 'LINKLOCAL', # fe80::/10
'1111111011' : 'SITELOCAL', # fec0::/10
'11111111' : 'MULTICAST', # ff00::/8
'0' * 96 : 'IPV4COMP', # ::/96
'0' * 80 + '1' * 16 : 'IPV4MAP', # ::ffff:0:0/96
'0' * 128 : 'UNSPECIFIED', # ::/128
'0' * 127 + '1' : 'LOOPBACK' # ::1/128
}
}
def __init__(self, ip, mask=None, version=0):
self.mask = mask
self.v = 0
# Parse input
if isinstance(ip, IP):
self.ip = ip.ip
self.dq = ip.dq
self.v = ip.v
self.mask = ip.mask
elif type(ip) in [types.IntType, types.LongType]:
self.ip = long(ip)
if self.ip <= 0xffffffff:
self.v = version or 4
self.dq = self._itodq(ip)
else:
self.v = version or 4
self.dq = self._itodq(ip)
else:
# If string is in CIDR notation
if '/' in ip:
ip, mask = ip.split('/', 1)
self.mask = int(mask)
self.v = version or 0
self.dq = ip
self.ip = self._dqtoi(ip)
assert self.v != 0, 'Could not parse input'
# Netmask defaults to one ip
if self.mask is None:
self.mask = self.v == 4 and 32 or 128
# Validate subnet size
if self.v == 6:
self.dq = self._itodq(self.ip)
if self.mask < 0 or self.mask > 128:
raise ValueError, "IPv6 subnet size must be between 0 and 128"
elif self.v == 4:
if self.mask < 0 or self.mask > 32:
raise ValueError, "IPv4 subnet size must be between 0 and 32"
def bin(self):
'''
Full-length binary representation of the IP address.
>>> ip = IP("127.0.0.1")
>>> print ip.bin()
01111111000000000000000000000001
'''
h = hex(self.ip).lower().rstrip('l')
b = ''.join(self._bitmask[x] for x in h[2:])
l = self.v == 4 and 32 or 128
return ''.join('0' for x in xrange(len(b), l)) + b
def hex(self):
'''
Full-length hexadecimal representation of the IP address.
>>> ip = IP("127.0.0.1")
>>> print ip.hex()
7f000001
'''
if self.v == 4:
return '%08x' % self.ip
else:
return '%032x' % self.ip
def subnet(self):
return self.mask
def version(self):
'''
IP version.
>>> ip = IP("127.0.0.1")
>>> print ip.version()
4
'''
return self.v
def info(self):
'''
Show IANA allocation information for the current IP address.
>>> ip = IP("127.0.0.1")
>>> print ip.info()
CLASS A
'''
b = self.bin()
l = self.v == 4 and 32 or 128
for i in range(len(b), 0, -1):
if self._range[self.v].has_key(b[:i]):
return self._range[self.v][b[:i]]
return 'UNKNOWN'
def _dqtoi(self, dq):
'''
Convert dotquad or hextet to long.
'''
# hex notation
if dq.startswith('0x'):
ip = long(dq[2:], 16)
if ip > 0xffffffffffffffffffffffffffffffffL:
raise ValueError, "%r: IP address is bigger than 2^128" % dq
if ip <= 0xffffffff:
self.v = 4
else:
self.v = 6
return ip
# IPv6
if ':' in dq:
hx = dq.split(':') # split hextets
if ':::' in dq:
raise ValueError, "%r: IPv6 address can't contain :::" % dq
# Mixed address (or 4-in-6), ::ffff:192.0.2.42
if '.' in dq:
return self._dqtoi(hx[-1])
if len(hx) > 8:
raise ValueError, "%r: IPv6 address with more than 8 hexletts" % dq
elif len(hx) < 8:
# No :: in address
if not '' in hx:
raise ValueError, "%r: IPv6 address invalid: compressed format malformed" % dq
elif not (dq.startswith('::') or dq.endswith('::')) and len([x for x in hx if x == '']) > 1:
raise ValueError, "%r: IPv6 address invalid: compressed format malformed" % dq
ix = hx.index('')
px = len(hx[ix+1:])
for x in xrange(ix+px+1, 8):
hx.insert(ix, '0')
elif dq.endswith('::'):
pass
elif '' in hx:
raise ValueError, "%r: IPv6 address invalid: compressed format detected in full notation" % dq
ip = ''
hx = [x == '' and '0' or x for x in hx]
for h in hx:
if len(h) < 4:
h = '%04x' % int(h, 16)
if 0 > int(h, 16) > 0xffff:
raise ValueError, "%r: IPv6 address invalid: hextets should be between 0x0000 and 0xffff" % dq
ip += h
self.v = 6
return long(ip, 16)
elif len(dq) == 32:
# Assume full heximal notation
self.v = 6
return long(h, 16)
# IPv4
if '.' in dq:
q = dq.split('.')
q.reverse()
if len(q) > 4:
raise ValueError, "%r: IPv4 address invalid: more than 4 bytes" % dq
for x in q:
if 0 > int(x) > 255:
raise ValueError, "%r: IPv4 address invalid: bytes should be between 0 and 255" % dq
while len(q) < 4:
q.insert(1, '0')
self.v = 4
return sum(long(byte) << 8 * index for index, byte in enumerate(q))
raise ValueError, "Invalid address input"
def _itodq(self, n):
'''
Convert long to dotquad or hextet.
'''
if self.v == 4:
return '.'.join(map(str, [(n>>24) & 0xff, (n>>16) & 0xff, (n>>8) & 0xff, n & 0xff]))
else:
n = '%032x' % n
return ':'.join(n[4*x:4*x+4] for x in xrange(0, 8))
def __str__(self):
'''
Return dotquad representation of the IP.
>>> ip = IP("::1")
>>> print str(ip)
0000:0000:0000:0000:0000:0000:0000:0001
'''
return self.dq
def __int__(self):
return int(self.ip)
def __long__(self):
return self.ip
def size(self):
return 1
def clone(self):
'''
Return a new <IP> object with a copy of this one.
>>> ip = IP('127.0.0.1')
>>> ip.clone()
<ipcalc.IP object at 0xb7d4d18c>
'''
return IP(self)
def to_ipv4(self):
'''
Convert (an IPv6) IP address to an IPv4 address, if possible. Only works
for IPv4-compat (::/96) and 6-to-4 (2002::/16) addresses.
>>> ip = IP('2002:c000:022a::')
>>> print ip.to_ipv4()
192.0.2.42
'''
if self.v == 4:
return self
else:
if self.bin().startswith('0' * 96):
return IP(long(self), version=4)
elif long(self) & 0x20020000000000000000000000000000L:
return IP((long(self)-0x20020000000000000000000000000000L)>>80, version=4)
else:
return ValueError, "%r: IPv6 address is not IPv4 compatible, nor a 6-to-4 IP" % self.dq
def to_ipv6(self, type='6-to-4'):
'''
Convert (an IPv4) IP address to an IPv6 address.
>>> ip = IP('192.0.2.42')
>>> print ip.to_ipv6()
2002:c000:022a:0000:0000:0000:0000:0000
'''
assert type in ['6-to-4', 'compat'], 'Conversion type not supported'
if self.v == 4:
if type == '6-to-4':
return IP(0x20020000000000000000000000000000L | long(self)<<80, version=6)
elif type == 'compat':
return IP(long(self), version=6)
else:
return self
def to_tuple(self):
'''
Used for comparisons.
'''
return (self.dq, self.mask)
class Network(IP):
'''
Network slice calculations.
>>> localnet = Network('127.0.0.1/8')
>>> print localnet
127.0.0.1
'''
def netmask(self):
'''
Network netmask derived from subnet size.
>>> localnet = Network('127.0.0.1/8')
>>> print localnet.netmask()
255.0.0.0
'''
if self.version() == 4:
return IP((0xffffffffL >> (32-self.mask)) << (32-self.mask), version=self.version())
else:
return IP((0xffffffffffffffffffffffffffffffffL >> (128-self.mask)) << (128-self.mask), version=self.version())
def network(self):
'''
Network address.
>>> localnet = Network('127.128.99.3/8')
>>> print localnet.network()
127.0.0.0
'''
return IP(self.ip & long(self.netmask()), version=self.version())
def broadcast(self):
'''
Broadcast address.
>>> localnet = Network('127.0.0.1/8')
>>> print localnet.broadcast()
127.255.255.255
'''
# XXX: IPv6 doesn't have a broadcast address, but it's used for other
# calculations such as <Network.host_last>.
if self.version() == 4:
return IP(long(self.network()) | (0xffffffff - long(self.netmask())), version=self.version())
else:
return IP(long(self.network()) | (0xffffffffffffffffffffffffffffffffL - long(self.netmask())), version=self.version())
def host_first(self):
'''
First available host in this subnet.
'''
if (self.version() == 4 and self.mask == 32) or (self.version() == 6 and self.mask == 128):
return self
return IP(long(self.network())+1, version=self.version())
def host_last(self):
'''
Last available host in this subnet.
'''
if (self.version() == 4 and self.mask == 32) or (self.version() == 6 and self.mask == 128):
return self
return IP(long(self.broadcast())-1, version=self.version())
def in_network(self, other):
'''
Check if the given IP address is within this network.
'''
other = Network(other)
return long(other) >= long(self) and long(other) < long(self) + self.size() - other.size() + 1
def __contains__(self, ip):
'''
Check if the given ip is part of the network.
>>> '192.0.2.42' in Network('192.0.2.0/24')
True
>>> '192.168.2.42' in Network('192.0.2.0/24')
False
'''
return self.in_network(ip)
def __lt__(self, other):
return self.size() < IP(other).size()
def __le__(self, other):
return self.size() <= IP(other).size()
def __gt__(self, other):
return self.size() > IP(other).size()
def __ge__(self, other):
return self.size() >= IP(other).size()
def __iter__(self):
'''
Generate a range of ip addresses within the network.
>>> for ip in Network('192.168.114.0/30'):
... print str(ip)
...
192.168.114.0
192.168.114.1
192.168.114.2
192.168.114.3
'''
for ip in [IP(long(self)+x) for x in xrange(0, self.size())]:
yield ip
def has_key(self, ip):
'''
Check if the given ip is part of the network.
>>> net = Network('192.0.2.0/24')
>>> net.has_key('192.168.2.0')
False
>>> net.has_key('192.0.2.42')
True
'''
return self.__contains__(ip)
def size(self):
'''
Number of ip's within the network.
>>> net = Network('192.0.2.0/24')
>>> print net.size()
256
'''
return 2 ** ((self.version() == 4 and 32 or 128) - self.mask)
if __name__ == '__main__':
tests = [
('192.168.114.42', 23, ['192.168.0.1', '192.168.114.128', '10.0.0.1']),
('123::', 128, ['123:456::', '::1', '123::456']),
('::42', 64, ['::1', '1::']),
('2001:dead:beef:1:c01d:c01a::', 48, ['2001:dead:beef:babe::'])
]
for ip, mask, test_ip in tests:
net = Network(ip, mask)
print '==========='
print 'ip address:', net
print 'to ipv6...:', net.to_ipv6()
print 'ip version:', net.version()
print 'ip info...:', net.info()
print 'subnet....:', net.subnet()
print 'num ip\'s..:', net.size()
print 'integer...:', long(net)
print 'hex.......:', net.hex()
print 'netmask...:', net.netmask()
# Not implemented in IPv6
if net.version() == 4:
print 'network...:', net.network()
print 'broadcast.:', net.broadcast()
print 'first host:', net.host_first()
print 'last host.:', net.host_last()
for ip in test_ip:
print '%s in network: ' % ip, ip in net
|