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ulgmodel.py
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ulgmodel.py
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#!/usr/bin/env python
#
# ULG - Universal Looking Glass
# (C) 2012 CZ.NIC, z.s.p.o.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Imports
import os
import re
import sys
from time import localtime, strftime
from genshi.template import TemplateLoader
from genshi.core import Markup
import pickle
import fcntl
import StringIO
import socket
import whois
import defaults
IPV4_SUBNET_REGEXP = '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}(/[0-9]{1,2}){0,1}$'
IPV4_ADDRESS_REGEXP = '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$'
IPV6_SUBNET_REGEXP = '^[0-9a-fA-F:]+(/[0-9]{1,2}){0,1}$'
IPV6_ADDRESS_REGEXP = '^[0-9a-fA-F:]+$'
def log(*messages):
try:
with open(defaults.log_file, 'a') as l:
for m in messages:
l.write(strftime("%b %d %Y %H:%M:%S: ", localtime()) + m + "\n")
except Exception:
pass
def debug(message):
if(defaults.debug):
log('DEBUG:' + message)
def import_config():
path, filename = os.path.split(defaults.config_file)
filename, ext = os.path.splitext(filename)
sys.path.append(path)
module = __import__(filename)
reload(module)
del sys.path[-1]
return module
def annotateAS(asn):
return asn
class PersistentStorage(object):
def __init__(self):
self.data = {}
def save(self,filename=defaults.persistent_storage_file):
# TODO: locking
f = open(filename,'wb')
pickle.dump(self, f)
f.close()
def get(self,key):
return self.data.get(key,None)
def set(self,key,value):
self.data[key] = value
def delete(self,key):
if(key in self.data.keys()):
del(self.data[key])
def getDict(self):
return self.data
def loadPersistentStorage(filename=defaults.persistent_storage_file):
# TODO: locking
if(os.path.isfile(filename)):
f = open(filename, 'rb')
s = pickle.load(f)
f.close()
return s
else:
return PersistentStorage()
class TableDecorator(object):
WHITE = 'white'
RED = 'red'
GREEN = 'green'
BLUE = 'blue'
YELLOW = 'yellow'
BLACK = 'black'
def __init__(self, table, table_header, table_headline=None, before=None, after=None):
self.table = table
self.table_header = table_header
self.table_headline = table_headline
self.before = before
self.after = after
self.loader=TemplateLoader(
os.path.join(os.path.dirname(__file__), defaults.template_dir),
auto_reload=True
)
def decorate(self):
def preprocessTableCell(td):
if(isinstance(td,(list,tuple))):
if(len(td) >= 2):
return (Markup(str(td[0])),Markup(str(td[1])))
elif(len(td) == 1):
return (Markup(str(td[0])),Markup(TableDecorator.WHITE))
else:
return ('',Markup(TableDecorator.WHITE))
else:
return (Markup(str(td)),Markup(TableDecorator.WHITE))
t = [[preprocessTableCell(td) for td in tr ] for tr in self.table]
template = self.loader.load(defaults.table_decorator_template_file)
return template.generate(table=t,
table_header=self.table_header,
table_headline=Markup(self.table_headline) if self.table_headline else '',
before=Markup(self.before) if self.before else '',
after=Markup(self.after) if self.after else '',
).render('html')
class TextParameter(object):
def __init__(self,pattern='.*',name=defaults.STRING_PARAMETER,default=''):
self.name=name
self.pattern=pattern
self.default=default
def getType(self):
return 'text'
def getName(self):
return self.name
def getDefault(self):
return self.default
def checkInput(self,input):
if(re.compile(self.pattern).match(input)):
return True
else:
return False
def normalizeInput(self,input):
if(self.checkInput(input)):
return input
else:
raise Exception("Invalid input encountered: Check did not passed.")
class AddressParameter(TextParameter):
""" Abstract base class """
def __init__(self,pattern=None,name=defaults.STRING_IPADDRESS,default=''):
TextParameter.__init__(self,pattern,name,default)
def _resolveAddress(self,input):
try:
return(socket.getaddrinfo(input,80,self.addrfam,0,socket.SOL_TCP)[0][4][0])
except Exception as e:
return None
def checkInput(self,input):
if(re.compile(self.pattern).match(input)):
return True
if(self._resolveAddress(input)):
return True
else:
return False
def normalizeInput(self,input):
if(re.compile(self.pattern).match(input)):
return input
res = self._resolveAddress(input)
if(res):
return res
else:
return input
class IPv4SubnetParameter(AddressParameter):
def __init__(self,name=defaults.STRING_IPSUBNET,default=''):
AddressParameter.__init__(self,IPV4_SUBNET_REGEXP,name,default)
self.addrfam=socket.AF_INET
def _resolveAddress(self,input):
addr = AddressParameter._resolveAddress(self,input)
if(addr):
return (addr)
else:
return None
class IPv4AddressParameter(AddressParameter):
def __init__(self,name=defaults.STRING_IPADDRESS,default=''):
AddressParameter.__init__(self,IPV4_ADDRESS_REGEXP,name,default)
self.addrfam=socket.AF_INET
class IPv6SubnetParameter(AddressParameter):
def __init__(self,name=defaults.STRING_IPSUBNET,default=''):
AddressParameter.__init__(self,IPV6_SUBNET_REGEXP,name,default)
self.addrfam=socket.AF_INET6
def _resolveAddress(self,input):
addr = AddressParameter._resolveAddress(self,input)
if(addr):
return (addr)
else:
return None
class IPv6AddressParameter(AddressParameter):
def __init__(self,name=defaults.STRING_IPADDRESS,default=''):
AddressParameter.__init__(self,IPV6_ADDRESS_REGEXP,name,default)
self.addrfam=socket.AF_INET6
class IPv64AddressParameter(IPv6AddressParameter):
def __init__(self,name=defaults.STRING_IPADDRESS,default=''):
IPv6AddressParameter.__init__(self,name,default)
self.ip6 = IPv6AddressParameter(name,default)
self.ip4 = IPv4AddressParameter(name,default)
def checkInput(self,input):
if(self.ip6.checkInput(input)):
return True
elif(self.ip4.checkInput(input)):
return True
else:
return False
def normalizeInput(self,input):
res1 = self.ip6.normalizeInput(input)
if(res1 != input):
return res1
res2 = self.ip4.normalizeInput(input)
if(res2 != input):
return res2
return input
class SelectionParameter(TextParameter):
def __init__(self,option_tuples=[],name=defaults.STRING_PARAMETER,default=None):
"option_tupes=[(value,name),(value2,name2),(value3equalsname3,),...]"
self.option_tuples = []
self.setOptions(option_tuples)
self.name=name
self.default=default
def getType(self):
return 'select'
def getDefault(self):
if(self.default and (self.default in [v[0] for v in self.getOptions()])):
return self.default
else:
return self.getOptions()[0]
def setOptions(self,option_tuples):
self.option_tuples = []
for o in option_tuples:
if(len(o) >= 2):
self.option_tuples.append(tuple((o[0],o[1],)))
elif(len(o) == 1):
self.option_tuples.append(tuple((o[0],o[0],)))
else:
raise Exception("Invalid option passed in SelectionParameter configuration. Zero-sized tuple.")
def getOptions(self):
return self.option_tuples
def checkInput(self,input):
if(input and (input in [v[0] for v in self.getOptions()])):
return True
else:
return False
def normalizeInput(self,input):
log("DEBUG: returning selection parameter input: "+str(input))
if(self.checkInput(input)):
return input
else:
raise Exception("Invalid input encountered: Check did not passed.")
class CommonSelectionParameter(SelectionParameter):
def __init__(self,oid,option_tuples=[],name=defaults.STRING_PARAMETER,default=None):
SelectionParameter.__init__(self,option_tuples,name,default)
self.setID(oid)
def getType(self):
return 'commonselect'
def setID(self,oid):
self.oid = oid
def getID(self):
return self.oid
class TextCommand(object):
def __init__(self,command,param_specs=[],name=None):
self.command=command
self.param_specs=param_specs
if(name==None):
if(self.param_specs):
self.name=command % tuple([('<'+str(c.getName())+'>') for c in self.param_specs])
else:
self.name=command
else:
self.name=name
def getParamSpecs(self):
return self.param_specs
def getName(self):
return self.name
def checkParamsInput(self,input):
if(((not input) and (self.getParamSpecs()))or((input) and (not self.getParamSpecs()))):
log("Failed checking parameter count to zero, input:"+str(input)+' .')
return False
if(len(input)!=len(self.getParamSpecs())):
log("Failed checking parameter count (nonzero), input: "+str(input)+' .')
return False
for pidx,p in enumerate(self.getParamSpecs()):
if not p.checkInput(input[pidx]):
log("Failed checking parameter: "+str(input[pidx]))
return False
return True
def normalizeParameters(self,parameters):
if parameters == None:
return []
else:
return [self.getParamSpecs()[pidx].normalizeInput(p) for pidx,p in enumerate(parameters)]
def getCommandText(self,parameters=None):
if(self.checkParamsInput(parameters)):
parameters_normalized = self.normalizeParameters(parameters)
if(parameters_normalized):
return self.command % tuple(parameters_normalized)
else:
return self.command
else:
return None
def rescanHook(self,router):
pass
def decorateResult(self,session,decorator_helper=None):
if(session.getResult() == None):
return (decorator_helper.pre(defaults.STRING_EMPTY), 1)
if(session.getRange() != None and self.showRange()):
s = str.splitlines(session.getResult())
r=''
for sl in s[session.getRange():session.getRange()+defaults.range_step+1]:
r += sl + "\n"
r = r.replace('<','<').replace('>','>')
return ("<pre>\n%s\n</pre>" % r, len(s))
else:
return ("<pre>\n%s\n</pre>" % session.getResult().replace('<','<').replace('>','>'),
len(str.splitlines(session.getResult())))
def getSpecialContent(self,session,**params):
raise Exception("getSpecialContet() is not implemented in ulgmodel.TextCommand.")
def showRange(self):
return True
def finishHook(self,session):
pass
class AnyCommand(TextCommand):
def __init__(self):
self.command=''
self.parameter = TextParameter('.+', name=defaults.STRING_COMMAND)
self.name=defaults.STRING_ANY
self.asn = 'My ASN'
def getCommandText(self,parameters=None):
c = ''
parameters_normalized = self.normalizeParameters(parameters)
if(len(parameters_normalized) == 0):
raise Exception("Can not construct AnyCommand without valid parameter.")
for p in parameters_normalized:
c = c + ' ' + p
return c
class Router(object):
def __init__(self):
self.setCommands([])
self.setName('')
def setName(self,name):
self.name=name
def getName(self):
return self.name
def setCommands(self, commands):
self.commands=commands
def listCommands(self):
return self.commands
def rescanHook(self):
for c in self.listCommands():
c.rescanHook(self)
def returnError(self,error=None):
r = defaults.STRING_ERROR_COMMANDRUN
r = r + ': '+error if error else r
return r
def __prepareCommand(self,command,parameters):
c = command.getCommandText(parameters)
if(c == None):
log("Bad params encountered in command "+str(command.getName())+" : "+str(parameters))
return None
debug("Going to run command "+c+" on router "+self.getName())
return c
def runSyncCommand(self,command,parameters):
c = self.__prepareCommand(command,parameters)
if(c):
return self.runRawSyncCommand(c)
else:
return self.returnError(defaults.STRING_BAD_PARAMS)
def runAsyncCommand(self,command,parameters,outfile):
c = self.__prepareCommand(command,parameters)
if(c):
return self.runRawCommand(c,outfile)
else:
outfile.write(self.returnError(defaults.STRING_BAD_PARAMS))
return
def runRawSyncCommand(self,command):
cr = StringIO.StringIO()
self.runRawCommand(command,cr)
return cr.getvalue()
def runRawCommand(self,command,outfile):
""" Abstract method. """
raise Exception("runRawCommand() method not supported for the abstract class Router. Inherit from the class and implement the method.")
def getForkNeeded(self):
return False
def setASN(self,asn):
self.asn = asn
def getASN(self):
return self.asn
class RemoteRouter(Router):
def getHost(self):
return self.host
def setHost(self,host):
self.host = host
def getPort(self):
return self.port
def setPort(self,port):
self.port = port
def getUser(self):
return self.user
def setUser(self,user):
self.user = user
def setPassword(self, password):
self.password = password
class LocalRouter(Router):
pass