code.vuplus.com Git - vuplus_dvbapp/blob - lib/python/Components/Network.py

   1 from os import system, popen, path as os_path, listdir
   2 from re import compile as re_compile, search as re_search
   3 from socket import *
   4 from enigma import eConsoleAppContainer
   5 from Components.Console import Console
   6
   7 class Network:
   8         def __init__(self):
   9                 self.ifaces = {}
  10                 self.configuredInterfaces = []
  11                 self.configuredNetworkAdapters = []
  12                 self.NetworkState = 0
  13                 self.DnsState = 0
  14                 self.nameservers = []
  15                 self.ethtool_bin = "/usr/sbin/ethtool"
  16                 self.container = eConsoleAppContainer()
  17                 self.Console = Console()
  18                 self.LinkConsole = Console()
  19                 self.restartConsole = Console()
  20                 self.deactivateConsole = Console()
  21                 self.activateConsole = Console()
  22                 self.resetNetworkConsole = Console()
  23                 self.DnsConsole = Console()
  24                 self.getInterfaces()
  25
  26         def getInterfaces(self, callback = None):
  27                 devicesPattern = re_compile('[a-z]+[0-9]+')
  28                 self.configuredInterfaces = []
  29                 fp = file('/proc/net/dev', 'r')
  30                 result = fp.readlines()
  31                 fp.close()
  32                 for line in result:
  33                         try:
  34                                 device = devicesPattern.search(line).group()
  35                                 if device == 'wifi0':
  36                                         continue
  37                                 self.getDataForInterface(device, callback)
  38                         except AttributeError:
  39                                 pass
  40                 #print "self.ifaces:", self.ifaces
  41                 #self.writeNetworkConfig()
  42                 #print ord(' ')
  43                 #for line in result:
  44                 #       print ord(line[0])
  45
  46         # helper function
  47         def regExpMatch(self, pattern, string):
  48                 if string is None:
  49                         return None
  50                 try:
  51                         return pattern.search(string).group()
  52                 except AttributeError:
  53                         None
  54
  55         # helper function to convert ips from a sring to a list of ints
  56         def convertIP(self, ip):
  57                 strIP = ip.split('.')
  58                 ip = []
  59                 for x in strIP:
  60                         ip.append(int(x))
  61                 return ip
  62
  63         def getDataForInterface(self, iface,callback):
  64                 #get ip out of ip addr, as avahi sometimes overrides it in ifconfig.
  65                 cmd = "ip -o addr"
  66                 self.Console.ePopen(cmd, self.IPaddrFinished, [iface,callback])
  67
  68         def IPaddrFinished(self, result, retval, extra_args):
  69                 (iface, callback ) = extra_args
  70                 data = { 'up': False, 'dhcp': False, 'preup' : False, 'postdown' : False }
  71                 globalIPpattern = re_compile("scope global")
  72                 ipRegexp = '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
  73                 netRegexp = '[0-9]{1,2}'
  74                 macRegexp = '[0-9]{2}\:[0-9]{2}\:[0-9]{2}\:[a-z0-9]{2}\:[a-z0-9]{2}\:[a-z0-9]{2}'
  75                 ipLinePattern = re_compile('inet ' + ipRegexp + '/')
  76                 ipPattern = re_compile(ipRegexp)
  77                 netmaskLinePattern = re_compile(ipRegexp + '/' + netRegexp)
  78                 netmaskPattern = re_compile(netRegexp)
  79                 bcastLinePattern = re_compile(' brd ' + ipRegexp)
  80                 upPattern = re_compile('UP')
  81                 macPattern = re_compile('[0-9]{2}\:[0-9]{2}\:[0-9]{2}\:[a-z0-9]{2}\:[a-z0-9]{2}\:[a-z0-9]{2}')
  82                 macLinePattern = re_compile('link/ether ' + macRegexp)
  83
  84                 for line in result.splitlines():
  85                         split = line.strip().split(' ',2)
  86                         if (split[1][:-1] == iface):
  87                                 up = self.regExpMatch(upPattern, split[2])
  88                                 mac = self.regExpMatch(macPattern, self.regExpMatch(macLinePattern, split[2]))
  89                                 if up is not None:
  90                                         data['up'] = True
  91                                         if iface is not 'lo':
  92                                                 self.configuredInterfaces.append(iface)
  93                                 if mac is not None:
  94                                         data['mac'] = mac
  95                         if (split[1] == iface):
  96                                 if re_search(globalIPpattern, split[2]):
  97                                         ip = self.regExpMatch(ipPattern, self.regExpMatch(ipLinePattern, split[2]))
  98                                         netmask = self.calc_netmask(self.regExpMatch(netmaskPattern, self.regExpMatch(netmaskLinePattern, split[2])))
  99                                         bcast = self.regExpMatch(ipPattern, self.regExpMatch(bcastLinePattern, split[2]))
 100                                         if ip is not None:
 101                                                 data['ip'] = self.convertIP(ip)
 102                                         if netmask is not None:
 103                                                 data['netmask'] = self.convertIP(netmask)
 104                                         if bcast is not None:
 105                                                 data['bcast'] = self.convertIP(bcast)
 106
 107                 if not data.has_key('ip'):
 108                         data['dhcp'] = True
 109                         data['ip'] = [0, 0, 0, 0]
 110                         data['netmask'] = [0, 0, 0, 0]
 111                         data['gateway'] = [0, 0, 0, 0]
 112
 113                 cmd = "route -n | grep  " + iface
 114                 self.Console.ePopen(cmd,self.routeFinished, [iface, data, callback])
 115
 116         def routeFinished(self, result, retval, extra_args):
 117                 (iface, data, callback) = extra_args
 118                 ipRegexp = '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
 119                 ipPattern = re_compile(ipRegexp)
 120                 ipLinePattern = re_compile(ipRegexp)
 121
 122                 for line in result.splitlines():
 123                         print line[0:7]
 124                         if line[0:7] == "0.0.0.0":
 125                                 gateway = self.regExpMatch(ipPattern, line[16:31])
 126                                 if gateway is not None:
 127                                         data['gateway'] = self.convertIP(gateway)
 128
 129                 self.ifaces[iface] = data
 130                 self.loadNetworkConfig(iface,callback)
 131
 132         def writeNetworkConfig(self):
 133                 self.configuredInterfaces = []
 134                 fp = file('/etc/network/interfaces', 'w')
 135                 fp.write("# automatically generated by enigma 2\n# do NOT change manually!\n\n")
 136                 fp.write("auto lo\n")
 137                 fp.write("iface lo inet loopback\n\n")
 138                 for ifacename, iface in self.ifaces.items():
 139                         if iface['up'] == True:
 140                                 fp.write("auto " + ifacename + "\n")
 141                                 self.configuredInterfaces.append(ifacename)
 142                         if iface['dhcp'] == True:
 143                                 fp.write("iface "+ ifacename +" inet dhcp\n")
 144                         if iface['dhcp'] == False:
 145                                 fp.write("iface "+ ifacename +" inet static\n")
 146                                 if iface.has_key('ip'):
 147                                         print tuple(iface['ip'])
 148                                         fp.write("      address %d.%d.%d.%d\n" % tuple(iface['ip']))
 149                                         fp.write("      netmask %d.%d.%d.%d\n" % tuple(iface['netmask']))
 150                                         if iface.has_key('gateway'):
 151                                                 fp.write("      gateway %d.%d.%d.%d\n" % tuple(iface['gateway']))
 152                         if iface.has_key("configStrings"):
 153                                 fp.write("\n" + iface["configStrings"] + "\n")
 154                         if iface["preup"] is not False and not iface.has_key("configStrings"):
 155                                 fp.write(iface["preup"])
 156                                 fp.write(iface["postdown"])
 157                         fp.write("\n")
 158                 fp.close()
 159                 self.writeNameserverConfig()
 160
 161         def writeNameserverConfig(self):
 162                 fp = file('/etc/resolv.conf', 'w')
 163                 for nameserver in self.nameservers:
 164                         fp.write("nameserver %d.%d.%d.%d\n" % tuple(nameserver))
 165                 fp.close()
 166
 167         def loadNetworkConfig(self,iface,callback = None):
 168                 interfaces = []
 169                 # parse the interfaces-file
 170                 try:
 171                         fp = file('/etc/network/interfaces', 'r')
 172                         interfaces = fp.readlines()
 173                         fp.close()
 174                 except:
 175                         print "[Network.py] interfaces - opening failed"
 176
 177                 ifaces = {}
 178                 currif = ""
 179                 for i in interfaces:
 180                         split = i.strip().split(' ')
 181                         if (split[0] == "iface"):
 182                                 currif = split[1]
 183                                 ifaces[currif] = {}
 184                                 if (len(split) == 4 and split[3] == "dhcp"):
 185                                         ifaces[currif]["dhcp"] = True
 186                                 else:
 187                                         ifaces[currif]["dhcp"] = False
 188                         if (currif == iface): #read information only for available interfaces
 189                                 if (split[0] == "address"):
 190                                         ifaces[currif]["address"] = map(int, split[1].split('.'))
 191                                         if self.ifaces[currif].has_key("ip"):
 192                                                 if self.ifaces[currif]["ip"] != ifaces[currif]["address"] and ifaces[currif]["dhcp"] == False:
 193                                                         self.ifaces[currif]["ip"] = map(int, split[1].split('.'))
 194                                 if (split[0] == "netmask"):
 195                                         ifaces[currif]["netmask"] = map(int, split[1].split('.'))
 196                                         if self.ifaces[currif].has_key("netmask"):
 197                                                 if self.ifaces[currif]["netmask"] != ifaces[currif]["netmask"] and ifaces[currif]["dhcp"] == False:
 198                                                         self.ifaces[currif]["netmask"] = map(int, split[1].split('.'))
 199                                 if (split[0] == "gateway"):
 200                                         ifaces[currif]["gateway"] = map(int, split[1].split('.'))
 201                                         if self.ifaces[currif].has_key("gateway"):
 202                                                 if self.ifaces[currif]["gateway"] != ifaces[currif]["gateway"] and ifaces[currif]["dhcp"] == False:
 203                                                         self.ifaces[currif]["gateway"] = map(int, split[1].split('.'))
 204                                 if (split[0] == "pre-up"):
 205                                         if self.ifaces[currif].has_key("preup"):
 206                                                 self.ifaces[currif]["preup"] = i
 207                                 if (split[0] == "post-down"):
 208                                         if self.ifaces[currif].has_key("postdown"):
 209                                                 self.ifaces[currif]["postdown"] = i
 210
 211                 for ifacename, iface in ifaces.items():
 212                         if self.ifaces.has_key(ifacename):
 213                                 self.ifaces[ifacename]["dhcp"] = iface["dhcp"]
 214                 if len(self.Console.appContainers) == 0:
 215                         # save configured interfacelist
 216                         self.configuredNetworkAdapters = self.configuredInterfaces
 217                         # load ns only once
 218                         self.loadNameserverConfig()
 219                         print "read configured interfac:", ifaces
 220                         print "self.ifaces after loading:", self.ifaces
 221                         if callback is not None:
 222                                 callback(True)
 223
 224         def loadNameserverConfig(self):
 225                 ipRegexp = "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}"
 226                 nameserverPattern = re_compile("nameserver +" + ipRegexp)
 227                 ipPattern = re_compile(ipRegexp)
 228
 229                 resolv = []
 230                 try:
 231                         fp = file('/etc/resolv.conf', 'r')
 232                         resolv = fp.readlines()
 233                         fp.close()
 234                         self.nameservers = []
 235                 except:
 236                         print "[Network.py] resolv.conf - opening failed"
 237
 238                 for line in resolv:
 239                         if self.regExpMatch(nameserverPattern, line) is not None:
 240                                 ip = self.regExpMatch(ipPattern, line)
 241                                 if ip is not None:
 242                                         self.nameservers.append(self.convertIP(ip))
 243
 244                 print "nameservers:", self.nameservers
 245
 246         def deactivateNetworkConfig(self, callback = None):
 247                 self.deactivateConsole = Console()
 248                 self.commands = []
 249                 self.commands.append("/etc/init.d/avahi-daemon stop")
 250                 for iface in self.ifaces.keys():
 251                         cmd = "ip addr flush " + iface
 252                         self.commands.append(cmd)
 253                 self.commands.append("/etc/init.d/networking stop")
 254                 self.commands.append("killall -9 udhcpc")
 255                 self.commands.append("rm /var/run/udhcpc*")
 256                 self.deactivateConsole.eBatch(self.commands, self.deactivateNetworkFinished, callback, debug=True)
 257
 258         def deactivateNetworkFinished(self,extra_args):
 259                 callback = extra_args
 260                 if len(self.deactivateConsole.appContainers) == 0:
 261                         if callback is not None:
 262                                 callback(True)
 263
 264         def activateNetworkConfig(self, callback = None):
 265                 self.activateConsole = Console()
 266                 self.commands = []
 267                 self.commands.append("/etc/init.d/networking start")
 268                 self.commands.append("/etc/init.d/avahi-daemon start")
 269                 self.activateConsole.eBatch(self.commands, self.activateNetworkFinished, callback, debug=True)
 270
 271         def activateNetworkFinished(self,extra_args):
 272                 callback = extra_args
 273                 if len(self.activateConsole.appContainers) == 0:
 274                         if callback is not None:
 275                                 callback(True)
 276
 277         def getConfiguredAdapters(self):
 278                 return self.configuredNetworkAdapters
 279
 280         def getNumberOfAdapters(self):
 281                 return len(self.ifaces)
 282
 283         def getFriendlyAdapterName(self, x):
 284                 # maybe this needs to be replaced by an external list.
 285                 friendlyNames = {
 286                         "eth0": _("Integrated Ethernet"),
 287                         "wlan0": _("Wireless"),
 288                         "ath0": _("Integrated Wireless")
 289                 }
 290                 return friendlyNames.get(x, x) # when we have no friendly name, use adapter name
 291
 292         def getAdapterName(self, iface):
 293                 return iface
 294
 295         def getAdapterList(self):
 296                 return self.ifaces.keys()
 297
 298         def getAdapterAttribute(self, iface, attribute):
 299                 if self.ifaces.has_key(iface):
 300                         if self.ifaces[iface].has_key(attribute):
 301                                 return self.ifaces[iface][attribute]
 302                 return None
 303
 304         def setAdapterAttribute(self, iface, attribute, value):
 305                 print "setting for adapter", iface, "attribute", attribute, " to value", value
 306                 if self.ifaces.has_key(iface):
 307                         self.ifaces[iface][attribute] = value
 308
 309         def removeAdapterAttribute(self, iface, attribute):
 310                 if self.ifaces.has_key(iface):
 311                         if self.ifaces[iface].has_key(attribute):
 312                                 del self.ifaces[iface][attribute]
 313
 314         def getNameserverList(self):
 315                 if len(self.nameservers) == 0:
 316                         return [[0, 0, 0, 0], [0, 0, 0, 0]]
 317                 else:
 318                         return self.nameservers
 319
 320         def clearNameservers(self):
 321                 self.nameservers = []
 322
 323         def addNameserver(self, nameserver):
 324                 if nameserver not in self.nameservers:
 325                         self.nameservers.append(nameserver)
 326
 327         def removeNameserver(self, nameserver):
 328                 if nameserver in self.nameservers:
 329                         self.nameservers.remove(nameserver)
 330
 331         def changeNameserver(self, oldnameserver, newnameserver):
 332                 if oldnameserver in self.nameservers:
 333                         for i in range(len(self.nameservers)):
 334                                 if self.nameservers[i] == oldnameserver:
 335                                         self.nameservers[i] = newnameserver
 336
 337         def resetNetworkConfig(self, mode='lan', callback = None):
 338                 self.resetNetworkConsole = Console()
 339                 self.commands = []
 340                 self.commands.append("/etc/init.d/avahi-daemon stop")
 341                 for iface in self.ifaces.keys():
 342                         cmd = "ip addr flush " + iface
 343                         self.commands.append(cmd)
 344                 self.commands.append("/etc/init.d/networking stop")
 345                 self.commands.append("killall -9 udhcpc")
 346                 self.commands.append("rm /var/run/udhcpc*")
 347                 self.resetNetworkConsole.eBatch(self.commands, self.resetNetworkFinishedCB, [mode, callback], debug=True)
 348
 349         def resetNetworkFinishedCB(self, extra_args):
 350                 (mode, callback) = extra_args
 351                 if len(self.resetNetworkConsole.appContainers) == 0:
 352                         self.writeDefaultNetworkConfig(mode, callback)
 353
 354         def writeDefaultNetworkConfig(self,mode='lan', callback = None):
 355                 fp = file('/etc/network/interfaces', 'w')
 356                 fp.write("# automatically generated by enigma 2\n# do NOT change manually!\n\n")
 357                 fp.write("auto lo\n")
 358                 fp.write("iface lo inet loopback\n\n")
 359                 if mode == 'wlan':
 360                         fp.write("auto wlan0\n")
 361                         fp.write("iface wlan0 inet dhcp\n")
 362                 if mode == 'wlan-mpci':
 363                         fp.write("auto ath0\n")
 364                         fp.write("iface ath0 inet dhcp\n")
 365                 if mode == 'lan':
 366                         fp.write("auto eth0\n")
 367                         fp.write("iface eth0 inet dhcp\n")
 368                 fp.write("\n")
 369                 fp.close()
 370
 371                 self.resetNetworkConsole = Console()
 372                 self.commands = []
 373                 if mode == 'wlan':
 374                         self.commands.append("ifconfig eth0 down")
 375                         self.commands.append("ifconfig ath0 down")
 376                         self.commands.append("ifconfig wlan0 up")
 377                 if mode == 'wlan-mpci':
 378                         self.commands.append("ifconfig eth0 down")
 379                         self.commands.append("ifconfig wlan0 down")
 380                         self.commands.append("ifconfig ath0 up")
 381                 if mode == 'lan':
 382                         self.commands.append("ifconfig eth0 up")
 383                         self.commands.append("ifconfig wlan0 down")
 384                         self.commands.append("ifconfig ath0 down")
 385                 self.commands.append("/etc/init.d/avahi-daemon start")
 386                 self.resetNetworkConsole.eBatch(self.commands, self.resetNetworkFinished, [mode,callback], debug=True)
 387
 388         def resetNetworkFinished(self,extra_args):
 389                 (mode, callback) = extra_args
 390                 if len(self.resetNetworkConsole.appContainers) == 0:
 391                         if callback is not None:
 392                                 callback(True,mode)
 393
 394         def checkNetworkState(self,statecallback):
 395                 # www.dream-multimedia-tv.de, www.heise.de, www.google.de
 396                 cmd1 = "ping -c 1 82.149.226.170"
 397                 cmd2 = "ping -c 1 193.99.144.85"
 398                 cmd3 = "ping -c 1 209.85.135.103"
 399                 self.PingConsole = Console()
 400                 self.PingConsole.ePopen(cmd1, self.checkNetworkStateFinished,statecallback)
 401                 self.PingConsole.ePopen(cmd2, self.checkNetworkStateFinished,statecallback)
 402                 self.PingConsole.ePopen(cmd3, self.checkNetworkStateFinished,statecallback)
 403
 404         def checkNetworkStateFinished(self, result, retval,extra_args):
 405                 (statecallback) = extra_args
 406                 if self.PingConsole is not None:
 407                         if retval == 0:
 408                                 self.PingConsole = None
 409                                 statecallback(self.NetworkState)
 410                         else:
 411                                 self.NetworkState += 1
 412                                 if len(self.PingConsole.appContainers) == 0:
 413                                         statecallback(self.NetworkState)
 414
 415         def restartNetwork(self,callback):
 416                 self.restartConsole = Console()
 417                 self.commands = []
 418                 self.commands.append("/etc/init.d/avahi-daemon stop")
 419                 for iface in self.ifaces.keys():
 420                         cmd = "ip addr flush " + iface
 421                         self.commands.append(cmd)
 422                 self.commands.append("/etc/init.d/networking stop")
 423                 self.commands.append("killall -9 udhcpc")
 424                 self.commands.append("rm /var/run/udhcpc*")
 425                 self.commands.append("/etc/init.d/networking start")
 426                 self.commands.append("/etc/init.d/avahi-daemon start")
 427                 self.restartConsole.eBatch(self.commands, self.restartNetworkFinished, callback, debug=True)
 428
 429         def restartNetworkFinished(self,extra_args):
 430                 callback = extra_args
 431                 if len(self.restartConsole.appContainers) == 0:
 432                         callback(True)
 433
 434         def getLinkState(self,iface,callback):
 435                 cmd = self.ethtool_bin + " " + iface
 436                 self.LinkConsole = Console()
 437                 self.LinkConsole.ePopen(cmd, self.getLinkStateFinished,callback)
 438
 439         def getLinkStateFinished(self, result, retval,extra_args):
 440                 (callback) = extra_args
 441                 if self.LinkConsole is not None:
 442                         if len(self.LinkConsole.appContainers) == 0:
 443                                 callback(result)
 444
 445         def stopLinkStateConsole(self):
 446                 if self.LinkConsole is not None:
 447                         self.LinkConsole = None
 448
 449         def stopDNSConsole(self):
 450                 if self.DnsConsole is not None:
 451                         self.DnsConsole = None
 452
 453         def stopRestartConsole(self):
 454                 if self.restartConsole is not None:
 455                         self.restartConsole = None
 456
 457         def RestartConsoleRunning(self):
 458                 if self.restartConsole is not None:
 459                         if len(self.restartConsole.appContainers) == 0:
 460                                 return False
 461                         else:
 462                                 return True
 463
 464         def checkforInterface(self,iface):
 465                 if self.getAdapterAttribute(iface, 'up') is True:
 466                         return True
 467                 else:
 468                         ret=system("ifconfig " + iface + " up")
 469                         system("ifconfig " + iface + " down")
 470                         if ret == 0:
 471                                 return True
 472                         else:
 473                                 return False
 474
 475         def checkDNSLookup(self,statecallback):
 476                 cmd1 = "nslookup www.dream-multimedia-tv.de"
 477                 cmd2 = "nslookup www.heise.de"
 478                 cmd3 = "nslookup www.google.de"
 479                 self.DnsConsole = Console()
 480                 self.DnsConsole.ePopen(cmd1, self.checkDNSLookupFinished,statecallback)
 481                 self.DnsConsole.ePopen(cmd2, self.checkDNSLookupFinished,statecallback)
 482                 self.DnsConsole.ePopen(cmd3, self.checkDNSLookupFinished,statecallback)
 483
 484         def checkDNSLookupFinished(self, result, retval,extra_args):
 485                 (statecallback) = extra_args
 486                 if self.DnsConsole is not None:
 487                         if retval == 0:
 488                                 self.DnsConsole = None
 489                                 statecallback(self.DnsState)
 490                         else:
 491                                 self.DnsState += 1
 492                                 if len(self.DnsConsole.appContainers) == 0:
 493                                         statecallback(self.DnsState)
 494
 495         def deactivateInterface(self,iface):
 496                 self.deactivateInterfaceConsole = Console()
 497                 self.commands = []
 498                 cmd1 = "ip addr flush " + iface
 499                 cmd2 = "ifconfig " + iface + " down"
 500                 self.commands.append(cmd1)
 501                 self.commands.append(cmd2)
 502                 self.deactivateInterfaceConsole.eBatch(self.commands, self.deactivateInterfaceFinished, extra_args = None, debug=True)
 503
 504         def deactivateInterfaceFinished(self,extra_args):
 505                 pass
 506
 507         def detectWlanModule(self):
 508                 self.wlanmodule = None
 509                 rt73_dir = "/sys/bus/usb/drivers/rt73/"
 510                 zd1211b_dir = "/sys/bus/usb/drivers/zd1211b/"
 511                 madwifi_dir = "/sys/bus/pci/drivers/ath_pci/"
 512                 if os_path.exists(madwifi_dir):
 513                         files = listdir(madwifi_dir)
 514                         if len(files) >= 1:
 515                                 self.wlanmodule = 'madwifi'
 516                 if os_path.exists(rt73_dir):
 517                         rtfiles = listdir(rt73_dir)
 518                         if len(rtfiles) == 2:
 519                                 self.wlanmodule = 'ralink'
 520                 if os_path.exists(zd1211b_dir):
 521                         zdfiles = listdir(zd1211b_dir)
 522                         if len(zdfiles) == 1:
 523                                 self.wlanmodule = 'zydas'
 524                 return self.wlanmodule
 525
 526         def calc_netmask(self,nmask):
 527                 from struct import pack, unpack
 528                 from socket import inet_ntoa, inet_aton
 529                 mask = 1L<<31
 530                 xnet = (1L<<32)-1
 531                 cidr_range = range(0, 32)
 532                 cidr = long(nmask)
 533                 if cidr not in cidr_range:
 534                         print 'cidr invalid: %d' % cidr
 535                         return None
 536                 else:
 537                         nm = ((1L<<cidr)-1)<<(32-cidr)
 538                         netmask = str(inet_ntoa(pack('>L', nm)))
 539                         return netmask
 540
 541 iNetwork = Network()
 542
 543 def InitNetwork():
 544         pass