SNMP代理在Python

Question

我需要Python中的SNMP代理，该监听某个端口上并响应SNMP的基本命令（如GTE，SET，GETNEXT ...等）

如果任何一个有代码，请回复此帖。

Answer 1

import socket 
import netsnmp 
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
s.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1) 
s.bind((HOST, PORT)) #give host ip and port no: 
s.listen(2) 

conn, addr = s.accept() 
data = conn.recv(1024) 
bindvariable = netsnmp.Varbind("give full oid here") 
xx = netsnmp.snmpget(bindvariable, Version = 2, DestHost = '192.168.0.216', Community='private') 

同样可以使用snmpset也走

Answer 2

那里pysnmp web-site的SNMP命令响应脚本的集合。

下面是一个简单的基于PySNMP的命令响应程序，它使用/ tmp中的文本文件作为MIB数据存储。

from pysnmp.entity import engine, config 
from pysnmp.entity.rfc3413 import cmdrsp, context 
from pysnmp.carrier.asynsock.dgram import udp 
from pysnmp.smi import instrum, error 
from pysnmp.proto.api import v2c 

snmpEngine = engine.SnmpEngine() 

config.addSocketTransport(
    snmpEngine, 
    udp.domainName, 
    udp.UdpTransport().openServerMode(('127.0.0.1', 1161)) 
) 

config.addV1System(snmpEngine, 'my-area', 'public', contextName='my-context') 

config.addVacmUser(snmpEngine, 2, 'my-area', 'noAuthNoPriv', (1,3,6), (1,3,6)) 

snmpContext = context.SnmpContext(snmpEngine) 

class FileInstrumController(instrum.AbstractMibInstrumController): 
    def readVars(self, vars, acInfo=(None, None)): 
     try: 
      return [ (o,v2c.OctetString(open('/tmp/%s.txt' % o, 'r').read())) for o,v in vars ] 
     except IOError: 
      raise error.SmiError 

    def writeVars(self, vars, acInfo=(None, None)): 
     try: 
      for o,v in vars: 
       open('/tmp/%s.txt' % o, 'w').write(str(v)) 
      return vars 
     except IOError: 
      raise error.SmiError 

snmpContext.registerContextName(
    v2c.OctetString('my-context'),   # Context Name 
    FileInstrumController()     # Management Instrumentation 
) 

cmdrsp.GetCommandResponder(snmpEngine, snmpContext) 
cmdrsp.SetCommandResponder(snmpEngine, snmpContext) 

snmpEngine.transportDispatcher.jobStarted(1) 

try: 
    snmpEngine.transportDispatcher.runDispatcher() 
except: 
    snmpEngine.transportDispatcher.closeDispatcher() 
    raise 

请记住，这个脚本只是一个初学者，它并不处理一些特殊情况。