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import socket, sys
from pysnmp.carrier.asyncore.dgram import udp, udp6, unix
from pysnmp import error
from pyasn1.compat.octets import null
class _AbstractTransportTarget:
transportDomain = None
protoTransport = NotImplementedError
def __init__(self, transportAddr, timeout=1, retries=5, tagList=null):
self.transportAddr = self._resolveAddr(transportAddr)
self.timeout = timeout
self.retries = retries
self.tagList = tagList
self.iface = None
def __repr__(self):
return '%s(%r, timeout=%r, retries=%r, tagList=%r)' % (
self.__class__.__name__, self.transportAddr,
self.timeout, self.retries, self.tagList
)
def getTransportInfo(self):
return self.transportDomain, self.transportAddr
def setLocalAddress(self, iface):
self.iface = iface
return self
def openClientMode(self):
self.transport = self.protoTransport().openClientMode(self.iface)
return self.transport
def verifyDispatcherCompatibility(self, snmpEngine):
if not self.protoTransport.isCompatibleWithDispatcher(snmpEngine.transportDispatcher):
raise error.PySnmpError('Transport %r is not compatible with dispatcher %r' % (self.protoTransport, snmpEngine.transportDispatcher))
def _resolveAddr(self, transportAddr): raise NotImplementedError()
class UdpTransportTarget(_AbstractTransportTarget):
transportDomain = udp.domainName
protoTransport = udp.UdpSocketTransport
def _resolveAddr(self, transportAddr):
try:
return socket.getaddrinfo(transportAddr[0],
transportAddr[1],
socket.AF_INET,
socket.SOCK_DGRAM,
socket.IPPROTO_UDP)[0][4][:2]
except socket.gaierror:
raise error.PySnmpError('Bad IPv4/UDP transport address %s: %s' % ('@'.join([ str(x) for x in transportAddr ]), sys.exc_info()[1]))
class Udp6TransportTarget(_AbstractTransportTarget):
transportDomain = udp6.domainName
protoTransport = udp6.Udp6SocketTransport
def _resolveAddr(self, transportAddr):
try:
return socket.getaddrinfo(transportAddr[0],
transportAddr[1],
socket.AF_INET6,
socket.SOCK_DGRAM,
socket.IPPROTO_UDP)[0][4][:2]
except socket.gaierror:
raise error.PySnmpError('Bad IPv6/UDP transport address %s: %s' % ('@'.join([ str(x) for x in transportAddr ]), sys.exc_info()[1]))
class UnixTransportTarget(_AbstractTransportTarget):
transportDomain = unix.domainName
protoTransport = unix.UnixSocketTransport
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