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#
# This file is part of pysnmp-apps software.
#
# Copyright (c) 2005-2016, Ilya Etingof <ilya@glas.net>
# License: http://pysnmp.sf.net/license.html
#
import socket
from pysnmp_apps.cli import base
from pysnmp.carrier.asynsock.dgram import udp, udp6
from pysnmp_apps.error import SnmpApplicationError
from pysnmp.entity import config
from pysnmp import error
# Usage
def getUsage():
return "\
Communication options\n\
-r RETRIES number of retries when sending request\n\
-t TIMEOUT request timeout (in seconds)\n\
Agent address:\n\
[<transport-domain>:]<transport-endpoint>\n\
transport-domain: \"udp\"|\"udp6\"\n\
transport-endpoint: \"IP\"|\"IPv6\"|\"FQDN\"[:\"port\"]\n\
"
# Scanner
class TargetScannerMixIn:
def t_retries(self, s):
r' -r '
self.rv.append(base.ConfigToken('retries'))
def t_timeout(self, s):
r' -t '
self.rv.append(base.ConfigToken('timeout'))
def t_transport(self, s):
r' (udp6)|(udp) '
self.rv.append(base.ConfigToken('transport', s))
# Parser
class TargetParserMixIn:
def p_targetSpec(self, args):
'''
Option ::= CommOption
CommOption ::= Retries
Retries ::= retries string
Retries ::= retries whitespace string
CommOption ::= Timeout
Timeout ::= timeout string
Timeout ::= timeout whitespace string
Agent ::= Transport semicolon Endpoint semicolon Format
Agent ::= Transport semicolon Endpoint
Agent ::= Endpoint semicolon Format
Agent ::= Endpoint
Transport ::= transport
Endpoint ::= string
Endpoint ::= lparen IPv6 rparen
IPv6 ::= string IPv6
IPv6 ::= semicolon IPv6
IPv6 ::=
Format ::= string
'''
# Generator
if hasattr(socket, 'has_ipv6') and socket.has_ipv6 and \
hasattr(socket, 'getaddrinfo'):
_getaddrinfo = socket.getaddrinfo
else:
def _getaddrinfo(a, b, c, d):
raise SnmpApplicationError('IPv6 not supported by the system')
class __TargetGeneratorPassOne(base.GeneratorTemplate):
defPort = '161'
_snmpDomainMap = {
'udp': (udp.snmpUDPDomain, udp.UdpSocketTransport, lambda h,p: (socket.gethostbyname(h), int(p))),
'udp6': (udp6.snmpUDP6Domain, udp6.Udp6SocketTransport, lambda h,p: (_getaddrinfo(h,p,socket.AF_INET6, socket.SOCK_DGRAM)[0][4]))
}
_snmpDomainNameMap = {
2: 'udp',
10: 'udp6'
}
def n_Transport(self, cbCtx, node):
snmpEngine, ctx = cbCtx
if node[0].attr in self._snmpDomainMap:
( ctx['transportDomain'],
ctx['transportModule'],
ctx['addrRewriteFun'] ) = self._snmpDomainMap[node[0].attr]
else:
raise error.PySnmpError(
'Unsupported transport domain %s' % node[0].attr
)
def n_Endpoint(self, cbCtx, node):
snmpEngine, ctx = cbCtx
ctx['transportAddress'] = node[0].attr
def n_IPv6(self, cbCtx, node):
snmpEngine, ctx = cbCtx
if not len(node):
if 'transportDomain' not in ctx:
( ctx['transportDomain'],
ctx['transportModule'],
ctx['addrRewriteFun'] ) = self._snmpDomainMap['udp6']
return
if ctx.get('transportAddress') is None:
ctx['transportAddress'] = ''
if node[0] == 'semicolon':
ctx['transportAddress'] = ctx['transportAddress'] + ':'
else:
ctx['transportAddress'] = ctx['transportAddress'] + node[0].attr
def n_Format(self, cbCtx, node):
snmpEngine, ctx = cbCtx
ctx['transportFormat'] = node[0].attr
def n_Agent_exit(self, cbCtx, node):
snmpEngine, ctx = cbCtx
if 'transportDomain' not in ctx:
try:
f = _getaddrinfo(ctx['transportAddress'], 0)[0][0]
except:
f = -1
( ctx['transportDomain'],
ctx['transportModule'],
ctx['addrRewriteFun'] ) = self._snmpDomainMap[
self._snmpDomainNameMap.get(f, 'udp')
]
if 'transportFormat' in ctx:
ctx['transportAddress'] = (
ctx['transportAddress'], ctx['transportFormat']
)
del ctx['transportFormat']
else:
ctx['transportAddress'] = ( ctx['transportAddress'], self.defPort)
class __TargetGeneratorTrapPassOne(__TargetGeneratorPassOne):
defPort = '162'
class __TargetGeneratorPassTwo(base.GeneratorTemplate):
def n_Retries(self, cbCtx, node):
snmpEngine, ctx = cbCtx
try:
if len(node) > 2:
ctx['retryCount'] = int(node[2].attr)
else:
ctx['retryCount'] = int(node[1].attr)
except ValueError:
raise error.PySnmpError('Bad retry value')
def n_Timeout(self, cbCtx, node):
snmpEngine, ctx = cbCtx
try:
if len(node) > 2:
ctx['timeout'] = int(node[2].attr)*100
else:
ctx['timeout'] = int(node[1].attr)*100
except:
raise error.PySnmpError('Bad timeout value')
def n_Agent_exit(self, cbCtx, node):
snmpEngine, ctx = cbCtx
ctx['addrName'] = '%s-name' % ctx['paramsName']
config.addTargetAddr(
snmpEngine,
ctx['addrName'],
ctx['transportDomain'],
ctx['addrRewriteFun'](*ctx['transportAddress']),
ctx['paramsName'],
# net-snmp defaults
ctx.get('timeout', 100),
ctx.get('retryCount', 5),
tagList=ctx.get('transportTag', '')
)
config.addSocketTransport(
snmpEngine,
ctx['transportDomain'],
ctx['transportModule']().openClientMode()
)
__TargetGeneratorTrapPassTwo = __TargetGeneratorPassTwo
def generator(cbCtx, ast):
snmpEngine, ctx = cbCtx
__TargetGeneratorPassTwo().preorder(
__TargetGeneratorPassOne().preorder((snmpEngine, ctx), ast), ast
)
def generatorTrap(cbCtx, ast):
snmpEngine, ctx = cbCtx
__TargetGeneratorTrapPassTwo().preorder(
__TargetGeneratorTrapPassOne().preorder((snmpEngine, ctx), ast), ast
)
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