[a]基于nodejs的最小snmp agent

假设我们创建一个agent，当客户端使用oid=1来查询时，会返回一个终极人生宇宙和任何事的答案42，那么代码就这样写：

var key = "Answer to the Ultimate Question of Life, the Universe, and Everything"
var snmp = require ("node-net-snmp");
var agent = snmp.createAgent({});
var authorizer = agent.getAuthorizer ();
authorizer.addCommunity ("public");
var scalarProvider = {
    name: key,
    type: snmp.MibProviderType.Scalar,
    oid: "1",
    scalarType: snmp.ObjectType.OctetString
};
agent.registerProvider (scalarProvider);
var mib = agent.getMib ();
mib.setScalarValue (key, "43");

客户端使用net-snmp工具集来查询：

# snmpget -v2c -cpublic 127.0.0.1 .1.0

返回结果：

iso.3.6.1 = STRING: "42"

或者修改它：

$snmpset -v2c -cpublic 127.0.0.1 .1.0 s "43"