/usr/share/pyshared/pysnmp/carrier/base.py is in python-pysnmp4 4.2.2-1.
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 | """Abstract I/O dispatcher. Defines standard dispatcher API"""
from pysnmp.carrier import error
class TimerCallable:
def __init__(self, cbFun, callInterval):
self.__cbFun = cbFun
self.__callInterval = callInterval
self.__nextCall = 0
def __call__(self, timeNow):
if self.__nextCall <= timeNow:
self.__cbFun(timeNow)
self.__nextCall = timeNow + self.__callInterval
def __eq__(self, cbFun): return self.__cbFun == cbFun
def __ne__(self, cbFun): return self.__cbFun != cbFun
def __lt__(self, cbFun): return self.__cbFun < cbFun
def __le__(self, cbFun): return self.__cbFun <= cbFun
def __gt__(self, cbFun): return self.__cbFun > cbFun
def __ge__(self, cbFun): return self.__cbFun >= cbFun
class AbstractTransportDispatcher:
def __init__(self):
self.__transports = {}
self.__jobs = {}
self.__recvCbFun = None
self.__timerCallables = []
self.__ticks = 0
self.__timerResolution = 0.5
self.__nextTime = 0
def _cbFun(self, incomingTransport, transportAddress, incomingMessage):
for name, transport in self.__transports.items():
if transport is incomingTransport:
transportDomain = name
break
else:
raise error.CarrierError(
'Unregistered transport %s' % (incomingTransport,)
)
if self.__recvCbFun is None:
raise error.CarrierError(
'Receive callback not registered -- loosing incoming event'
)
self.__recvCbFun(
self, transportDomain, transportAddress, incomingMessage
)
# Dispatcher API
def registerRecvCbFun(self, recvCbFun):
if self.__recvCbFun is not None:
raise error.CarrierError(
'Receive callback already registered: %s' % self.__recvCbFun
)
self.__recvCbFun = recvCbFun
def unregisterRecvCbFun(self):
self.__recvCbFun = None
def registerTimerCbFun(self, timerCbFun, tickInterval=None):
if not tickInterval:
tickInterval = self.__timerResolution
self.__timerCallables.append(TimerCallable(timerCbFun, tickInterval))
def unregisterTimerCbFun(self, timerCbFun=None):
if timerCbFun is None:
self.__timerCallables = []
else:
self.__timerCallables.remove(timerCbFun)
def registerTransport(self, tDomain, transport):
if tDomain in self.__transports:
raise error.CarrierError(
'Transport %s already registered' % (tDomain,)
)
transport.registerCbFun(self._cbFun)
self.__transports[tDomain] = transport
def unregisterTransport(self, tDomain):
if tDomain not in self.__transports:
raise error.CarrierError(
'Transport %s not registered' % (tDomain,)
)
self.__transports[tDomain].unregisterCbFun()
del self.__transports[tDomain]
def getTransport(self, transportDomain):
if transportDomain in self.__transports:
return self.__transports[transportDomain]
raise error.CarrierError(
'Transport %s not registered' % (transportDomain,)
)
def sendMessage(
self, outgoingMessage, transportDomain, transportAddress
):
if transportDomain in self.__transports:
self.__transports[transportDomain].sendMessage(
outgoingMessage, transportAddress
)
else:
raise error.CarrierError(
'No suitable transport domain for %s' % (transportDomain,)
)
def getTimerResolution(self):
return self.__timerResolution
def setTimerResolution(self, timerResolution):
if timerResolution < 0.01 or timerResolution > 10:
raise error.CarrierError('Impossible timer resolution')
self.__timerResolution = timerResolution
def getTimerTicks(self): return self.__ticks
def handleTimerTick(self, timeNow):
if self.__nextTime == 0: # initial initialization
self.__nextTime = timeNow + self.__timerResolution
if self.__nextTime > timeNow:
return
self.__ticks += 1
self.__nextTime = timeNow + self.__timerResolution
for timerCallable in self.__timerCallables:
timerCallable(timeNow)
def jobStarted(self, jobId):
if jobId in self.__jobs:
self.__jobs[jobId] = self.__jobs[jobId] + 1
else:
self.__jobs[jobId] = 1
def jobFinished(self, jobId):
self.__jobs[jobId] = self.__jobs[jobId] - 1
if self.__jobs[jobId] == 0:
del self.__jobs[jobId]
def jobsArePending(self):
if self.__jobs:
return 1
else:
return 0
def runDispatcher(self, timeout=0.0):
raise error.CarrierError('Method not implemented')
def closeDispatcher(self):
for tDomain in list(self.__transports):
self.__transports[tDomain].closeTransport()
self.unregisterTransport(tDomain)
self.unregisterRecvCbFun()
self.unregisterTimerCbFun()
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