/usr/lib/python2.7/dist-packages/pyroute2/common.py is in python-pyroute2 0.3.5-1.
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 | '''
Common utilities
'''
import re
import os
import sys
import struct
import platform
import threading
from socket import inet_aton
try:
basestring = basestring
except NameError:
basestring = (str, bytes)
AF_PIPE = 255 # Right now AF_MAX == 40
DEFAULT_RCVBUF = 16384
ANCIENT = (platform.dist()[0] in ('redhat', 'centos') and
platform.dist()[1].startswith('6.') or
os.environ.get('PYROUTE2_ANCIENT', False))
size_suffixes = {'b': 1,
'k': 1024,
'kb': 1024,
'm': 1024 * 1024,
'mb': 1024 * 1024,
'g': 1024 * 1024 * 1024,
'gb': 1024 * 1024 * 1024,
'kbit': 1024 / 8,
'mbit': 1024 * 1024 / 8,
'gbit': 1024 * 1024 * 1024 / 8}
time_suffixes = {'s': 1,
'sec': 1,
'secs': 1,
'ms': 1000,
'msec': 1000,
'msecs': 1000,
'us': 1000000,
'usec': 1000000,
'usecs': 1000000}
rate_suffixes = {'bit': 1,
'Kibit': 1024,
'kbit': 1000,
'mibit': 1024 * 1024,
'mbit': 1000000,
'gibit': 1024 * 1024 * 1024,
'gbit': 1000000000,
'tibit': 1024 * 1024 * 1024 * 1024,
'tbit': 1000000000000,
'Bps': 8,
'KiBps': 8 * 1024,
'KBps': 8000,
'MiBps': 8 * 1024 * 1024,
'MBps': 8000000,
'GiBps': 8 * 1024 * 1024 * 1024,
'GBps': 8000000000,
'TiBps': 8 * 1024 * 1024 * 1024 * 1024,
'TBps': 8000000000000}
##
# General purpose
#
class Dotkeys(dict):
'''
This is a sick-minded hack of dict, intended to be an eye-candy.
It allows to get dict's items byt dot reference:
ipdb["lo"] == ipdb.lo
ipdb["eth0"] == ipdb.eth0
Obviously, it will not work for some cases, like unicode names
of interfaces and so on. Beside of that, it introduces some
complexity.
But it simplifies live for old-school admins, who works with good
old "lo", "eth0", and like that naming schemes.
'''
var_name = re.compile('^[a-zA-Z_]+[a-zA-Z_0-9]*$')
def __dir__(self):
return [i for i in self if
type(i) == str and self.var_name.match(i)]
def __getattribute__(self, key, *argv):
try:
return dict.__getattribute__(self, key)
except AttributeError as e:
if key == '__deepcopy__':
raise e
return self[key]
def __setattr__(self, key, value):
if key in self:
self[key] = value
else:
dict.__setattr__(self, key, value)
def __delattr__(self, key):
if key in self:
del self[key]
else:
dict.__delattr__(self, key)
def map_namespace(prefix, ns):
'''
Take the namespace prefix, list all constants and build two
dictionaries -- straight and reverse mappings. E.g.:
## neighbor attributes
NDA_UNSPEC = 0
NDA_DST = 1
NDA_LLADDR = 2
NDA_CACHEINFO = 3
NDA_PROBES = 4
(NDA_NAMES, NDA_VALUES) = map_namespace('NDA', globals())
Will lead to:
NDA_NAMES = {'NDA_UNSPEC': 0,
...
'NDA_PROBES': 4}
NDA_VALUES = {0: 'NDA_UNSPEC',
...
4: 'NDA_PROBES'}
'''
by_name = dict([(i, ns[i]) for i in ns.keys() if i.startswith(prefix)])
by_value = dict([(ns[i], i) for i in ns.keys() if i.startswith(prefix)])
return (by_name, by_value)
def dqn2int(mask):
'''
IPv4 dotted quad notation to int mask conversion
'''
return bin(struct.unpack('>L', inet_aton(mask))[0]).count('1')
def hexdump(payload, length=0):
'''
Represent byte string as hex -- for debug purposes
'''
if sys.version[0] == '3':
return ':'.join('{0:02x}'.format(c)
for c in payload[:length] or payload)
else:
return ':'.join('{0:02x}'.format(ord(c))
for c in payload[:length] or payload)
class AddrPool(object):
'''
Address pool
'''
cell = 0xffffffffffffffff
def __init__(self, minaddr=0xf, maxaddr=0xffffff, reverse=False):
self.cell_size = 0 # in bits
mx = self.cell
self.reverse = reverse
self.ban = []
while mx:
mx >>= 8
self.cell_size += 1
self.cell_size *= 8
# calculate, how many ints we need to bitmap all addresses
self.cells = int((maxaddr - minaddr) / self.cell_size + 1)
# initial array
self.addr_map = [self.cell]
self.minaddr = minaddr
self.maxaddr = maxaddr
self.lock = threading.RLock()
def alloc(self):
with self.lock:
# gc self.ban:
for item in tuple(self.ban):
if item['counter'] == 0:
self.free(item['addr'])
self.ban.remove(item)
else:
item['counter'] -= 1
# iterate through addr_map
base = 0
for cell in self.addr_map:
if cell:
# not allocated addr
bit = 0
while True:
if (1 << bit) & self.addr_map[base]:
self.addr_map[base] ^= 1 << bit
break
bit += 1
ret = (base * self.cell_size + bit)
if self.reverse:
ret = self.maxaddr - ret
else:
ret = ret + self.minaddr
if self.minaddr <= ret <= self.maxaddr:
return ret
else:
self.free(ret)
raise KeyError('no free address available')
base += 1
# no free address available
if len(self.addr_map) < self.cells:
# create new cell to allocate address from
self.addr_map.append(self.cell)
return self.alloc()
else:
raise KeyError('no free address available')
def free(self, addr, ban=0):
with self.lock:
if ban != 0:
self.ban.append({'addr': addr,
'counter': ban})
else:
if self.reverse:
addr = self.maxaddr - addr
else:
addr -= self.minaddr
base = addr // self.cell_size
bit = addr % self.cell_size
if len(self.addr_map) <= base:
raise KeyError('address is not allocated')
if self.addr_map[base] & (1 << bit):
raise KeyError('address is not allocated')
self.addr_map[base] ^= 1 << bit
|