| 1 | #!/usr/bin/env python
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| 2 | # zoek de eerste vrije (== niet in een wleiden.conf gedefinieerde) interlink
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| 3 | # range
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| 4 | # lodewijk@wirelessleiden.nl
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| 5 | import re
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| 6 | import sys
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| 7 | import glob
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| 8 |
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| 9 | size = 30
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| 10 | if len(sys.argv) < 2:
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| 11 | print "Gebruik: %s <interlink|subnet> <grootte> [aantal]" % sys.argv[0]
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| 12 | print "Voorbeelden:"
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| 13 | print "\tVoor drie /29 interlinks - '%s interlink 29 3'" % sys.argv[0]
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| 14 | print "\tVoor een (1) /24 subnet - '%s subnet 24'" % sys.argv[0]
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| 15 | exit(1)
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| 16 |
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| 17 | interlink = sys.argv[1] == 'interlink'
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| 18 | size = int(sys.argv[2])
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| 19 | try:
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| 20 | aantal = int(sys.argv[3])
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| 21 | except (KeyError,IndexError):
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| 22 | aantal = 1
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| 23 | numaddrs = 1 << (32 - size)
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| 24 |
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| 25 | substre = re.compile("^(\$[a-zA-Z][^ =]*) ?= ?'([^']*)';")
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| 26 |
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| 27 | def parseaddr(s):
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| 28 | f = s.split('.')
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| 29 | return (long(f[0]) << 24L) + \
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| 30 | (long(f[1]) << 16L) + \
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| 31 | (long(f[2]) << 8L) + \
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| 32 | long(f[3])
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| 33 |
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| 34 | def showaddr(a):
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| 35 | return "%d.%d.%d.%d" % ((a >> 24) & 0xff, (a >> 16) & 0xff, (a >> 8) & 0xff, a & 0xff)
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| 36 |
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| 37 | bezet = {}
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| 38 |
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| 39 | for fname in glob.glob("*/wleiden.conf"):
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| 40 | substs = {}
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| 41 | lineNr = 0
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| 42 | for l in open(fname):
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| 43 | lineNr += 1
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| 44 | l = l[:-1]
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| 45 | match = substre.match(l)
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| 46 | if match != None:
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| 47 | substs[match.group(1)] = match.group(2)
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| 48 | if l.startswith("IP="):
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| 49 | right = l[3:]
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| 50 | if '/' not in right:
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| 51 | addr = right
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| 52 | mask = 32
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| 53 | else:
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| 54 | addr, mask = right.split('/')
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| 55 | if addr in substs:
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| 56 | addr = substs[addr]
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| 57 | try:
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| 58 | addr = parseaddr(addr)
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| 59 | mask = int(mask)
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| 60 | addr = addr & ~((1 << (32 - mask)) - 1)
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| 61 | for i in range(0, (1 << (32 - mask))):
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| 62 | bezet[addr + i] = 1
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| 63 | except ValueError, e:
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| 64 | print "[FOUT] in bestand '%s' regel '%i': %s" % (fname, lineNr, l)
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| 65 |
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| 66 | # Fetching smallest in use IP
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| 67 | # XXX: Currently not used for anything
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| 68 | i = parseaddr("255.255.255.255")
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| 69 | for k in bezet.keys():
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| 70 | if k < i:
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| 71 | i = k
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| 72 |
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| 73 | # Interlinks are living in special ranges usually
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| 74 | if interlink:
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| 75 | i = parseaddr("172.16.3.0")
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| 76 | else:
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| 77 | i = parseaddr("172.17.0.0")
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| 78 |
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| 79 | for n in xrange(aantal):
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| 80 | okay = False
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| 81 | while not okay:
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| 82 | while bezet.has_key(i):
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| 83 | i = i + numaddrs
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| 84 |
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| 85 | # Assume Ok, till we find a already used IP
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| 86 | okay = True
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| 87 | for j in range(numaddrs):
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| 88 | if bezet.has_key(i + j):
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| 89 | i = i + numaddrs
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| 90 | okay = False
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| 91 | break
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| 92 |
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| 93 | print "%s/%d:" % (showaddr(i), size),
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| 94 | if size > 28:
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| 95 | print " en ".join([showaddr(i) for i in range(i + 1, i + numaddrs - 1)])
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| 96 | else:
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| 97 | print " en ".join([showaddr(i) for i in range(i + 1, i + 4)]),
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| 98 | print "...",
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| 99 | print " en ".join([showaddr(i) for i in range(i + numaddrs - 7, i + numaddrs - 4)])
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| 100 | bezet[i] = 1
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