This file is indexed.

/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