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# MIB modules loader
import os
from pysnmp.smi import error
try:
import pysnmp_mibs
except ImportError:
pysnmp_mibs = None
from pysnmp import debug
class MibBuilder:
def __init__(self):
self.lastBuildId = self._autoName = 0L
paths = (
os.path.join(os.path.split(error.__file__)[0], 'mibs','instances'),
os.path.join(os.path.split(error.__file__)[0], 'mibs')
)
if os.environ.has_key('PYSNMP_MIB_DIR'):
paths = paths + (
os.path.join(os.path.split(os.environ['PYSNMP_MIB_DIR'])[0]),
)
if pysnmp_mibs:
paths = paths + (
os.path.join(os.path.split(pysnmp_mibs.__file__)[0]),
)
self.mibSymbols = {}
self.__modSeen = {}
self.__modPathsSeen = {}
apply(self.setMibPath, paths)
# MIB modules management
def setMibPath(self, *mibPaths):
self.__mibPaths = map(os.path.normpath, mibPaths)
debug.logger & debug.flagBld and debug.logger('setMibPath: new MIB path %s' % (self.__mibPaths,))
def getMibPath(self): return tuple(self.__mibPaths)
def loadModules(self, *modNames):
# Build a list of available modules
if not modNames:
modNames = {}
for mibPath in self.__mibPaths:
try:
for modName in os.listdir(mibPath):
if modName == '__init__.py' or modName[-3:] != '.py':
continue
modNames[modName[:-3]] = None
except OSError:
continue
modNames = modNames.keys()
if not modNames:
raise error.SmiError(
'No MIB module to load at %s' % (self,)
)
for modName in modNames:
for mibPath in self.__mibPaths:
modPath = os.path.join(
mibPath, modName + '.py'
)
debug.logger & debug.flagBld and debug.logger('loadModules: trying %s' % modPath)
try:
open(modPath).close()
except IOError, why:
debug.logger & debug.flagBld and debug.logger('loadModules: open() %s' % why)
continue
if self.__modPathsSeen.has_key(modPath):
debug.logger & debug.flagBld and debug.logger('loadModules: seen %s' % modPath)
continue
else:
self.__modPathsSeen[modPath] = 1
g = { 'mibBuilder': self }
try:
execfile(modPath, g)
except StandardError, why:
del self.__modPathsSeen[modPath]
raise error.SmiError(
'MIB module \"%s\" load error: %s' % (modPath, why)
)
self.__modSeen[modName] = modPath
debug.logger & debug.flagBld and debug.logger('loadModules: loaded %s' % modPath)
break
if not self.__modSeen.has_key(modName):
raise error.SmiError(
'MIB file \"%s.py\" not found in search path' % modName
)
return self
def unloadModules(self, *modNames):
if not modNames:
modNames = self.mibSymbols.keys()
for modName in modNames:
if not self.mibSymbols.has_key(modName):
raise error.SmiError(
'No module %s at %s' % (modName, self)
)
self.unexportSymbols(modName)
del self.__modPathsSeen[self.__modSeen[modName]]
del self.__modSeen[modName]
debug.logger & debug.flagBld and debug.logger('unloadModules: ' % (modName))
return self
def importSymbols(self, modName, *symNames):
r = ()
for symName in symNames:
if not self.mibSymbols.has_key(modName):
self.loadModules(modName)
if not self.mibSymbols.has_key(modName):
raise error.SmiError(
'No module %s loaded at %s' % (modName, self)
)
if not self.mibSymbols[modName].has_key(symName):
raise error.SmiError(
'No symbol %s::%s at %s' % (modName, symName, self)
)
r = r + (self.mibSymbols[modName][symName],)
return r
def exportSymbols(self, modName, *anonymousSyms, **namedSyms):
if not self.mibSymbols.has_key(modName):
self.mibSymbols[modName] = {}
mibSymbols = self.mibSymbols[modName]
for symObj in anonymousSyms:
debug.logger & debug.flagBld and debug.logger('exportSymbols: anonymous symbol %s::__pysnmp_%ld' % (modName, self._autoName))
mibSymbols['__pysnmp_%ld' % self._autoName] = symObj
self._autoName = self._autoName + 1
for symName, symObj in namedSyms.items():
if mibSymbols.has_key(symName):
raise error.SmiError(
'Symbol %s already exported at %s' % (symName, modName)
)
if hasattr(symObj, 'label') and symObj.label:
symName = symObj.label
mibSymbols[symName] = symObj
debug.logger & debug.flagBld and debug.logger('exportSymbols: symbol %s::%s' % (modName, symName))
self.lastBuildId = self.lastBuildId + 1
def unexportSymbols(self, modName, *symNames):
if not self.mibSymbols.has_key(modName):
raise error.SmiError(
'No module %s at %s' % (modName, self)
)
mibSymbols = self.mibSymbols[modName]
if not symNames:
symNames = mibSymbols.keys()
for symName in symNames:
if not mibSymbols.has_key(symName):
raise error.SmiError(
'No symbol %s::%s at %s' % (modName, symName, self)
)
del mibSymbols[symName]
debug.logger & debug.flagBld and debug.logger('unexportSymbols: symbol %s::%s' % (modName, symName))
self.lastBuildId = self.lastBuildId + 1
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