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
|
import socket, sys
from pysnmp.carrier.twisted.dgram import udp
from pysnmp.hlapi.transport import AbstractTransportTarget
__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 error.PySnmpError('Bad IPv4/UDP transport address %s: %s' % ('@'.join([ str(x) for x in transportAddr ]), sys.exc_info()[1]))
|
