59 lines
2.2 KiB
Python
59 lines
2.2 KiB
Python
#
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# This file is part of pysnmp software.
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#
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# Copyright (c) 2005-2017, Ilya Etingof <etingof@gmail.com>
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# License: http://pysnmp.sf.net/license.html
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#
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import socket, sys
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from pysnmp.carrier.twisted.dgram import udp
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from pysnmp.hlapi.transport import AbstractTransportTarget
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from pysnmp.error import PySnmpError
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__all__ = ['UdpTransportTarget']
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class UdpTransportTarget(AbstractTransportTarget):
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"""Creates UDP/IPv4 configuration entry and initialize socket API if needed.
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This object can be used for adding new entries to Local Configuration
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Datastore (LCD) managed by :py:class:`~pysnmp.hlapi.SnmpEngine`
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class instance.
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See :RFC:`1906#section-3` for more information on the UDP transport mapping.
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Parameters
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----------
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transportAddr : tuple
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Indicates remote address in Python :py:mod:`socket` module format
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which is a tuple of FQDN, port where FQDN is a string representing
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either hostname or IPv4 address in quad-dotted form, port is an
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integer.
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timeout : int
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Response timeout in seconds.
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retries : int
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Maximum number of request retries, 0 retries means just a single
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request.
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tagList : str
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Arbitrary string that contains a list of tag values which are used
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to select target addresses for a particular operation
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(:RFC:`3413#section-4.1.4`).
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Examples
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--------
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>>> from pysnmp.hlapi.twisted import UdpTransportTarget
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>>> UdpTransportTarget(('demo.snmplabs.com', 161))
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UdpTransportTarget(('195.218.195.228', 161), timeout=1, retries=5, tagList='')
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>>>
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"""
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transportDomain = udp.domainName
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protoTransport = udp.UdpTwistedTransport
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def _resolveAddr(self, transportAddr):
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try:
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return socket.getaddrinfo(transportAddr[0],
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transportAddr[1],
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socket.AF_INET,
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socket.SOCK_DGRAM,
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socket.IPPROTO_UDP)[0][4][:2]
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except socket.gaierror:
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raise PySnmpError('Bad IPv4/UDP transport address %s: %s' % ('@'.join([str(x) for x in transportAddr]), sys.exc_info()[1]))
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