/usr/lib/python3/dist-packages/pysnmp/hlapi/twisted/transport.py is in python3-pysnmp4 4.3.2-2.
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# This file is part of pysnmp software.
#
# Copyright (c) 2005-2016, Ilya Etingof <ilya@glas.net>
# License: http://pysnmp.sf.net/license.html
#
import socket, sys
from pysnmp.carrier.twisted.dgram import udp
from pysnmp.hlapi.transport import AbstractTransportTarget
from pysnmp.error import PySnmpError
__all__ = ['UdpTransportTarget']
class UdpTransportTarget(AbstractTransportTarget):
"""Creates UDP/IPv4 configuration entry and initialize socket API if needed.
This object can be used for adding new entries to Local Configuration
Datastore (LCD) managed by :py:class:`~pysnmp.hlapi.SnmpEngine`
class instance.
See :RFC:`1906#section-3` for more information on the UDP transport mapping.
Parameters
----------
transportAddr : tuple
Indicates remote address in Python :py:mod:`socket` module format
which is a tuple of FQDN, port where FQDN is a string representing
either hostname or IPv4 address in quad-dotted form, port is an
integer.
timeout : int
Response timeout in seconds.
retries : int
Maximum number of request retries, 0 retries means just a single
request.
tagList : str
Arbitrary string that contains a list of tag values which are used
to select target addresses for a particular operation
(:RFC:`3413#section-4.1.4`).
Examples
--------
>>> from pysnmp.hlapi.twisted import UdpTransportTarget
>>> UdpTransportTarget(('demo.snmplabs.com', 161))
UdpTransportTarget(('195.218.195.228', 161), timeout=1, retries=5, tagList='')
>>>
"""
transportDomain = udp.domainName
protoTransport = udp.UdpTwistedTransport
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 PySnmpError('Bad IPv4/UDP transport address %s: %s' % ('@'.join([str(x) for x in transportAddr]), sys.exc_info()[1]))
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