Question

我需要通过snmp检索信息，然后使用此信息在Unity中创建某种图形应用程序。

我找到了SnmpSharp库 http://www.snmpsharpnet.com/

我使用这个库创建一个统一的小程序然后我在我的Windows机器上安装了snmp（使用Windows官方指南），在localhost上它可以工作！

现在我的问题是我如何连接到我的局域网上的其他代理？如何在我的其他设备上安装代理示例linux pc？我有点困惑，因为我尝试在其他Windows PC上安装snmp，但我无法从中检索snmp信息;我尝试在linux上安装snmp代理，但我不明白如何正确安装必须通过我的局域网进行通信的代理

这是适用于localhost的代码

using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using SnmpSharpNet;
using System.Net;


public class SNMP_walk : MonoBehaviour {

[SerializeField] public InputField community_str;
[SerializeField] public InputField agent_ip_address;
[SerializeField] public Button MyButton ;
string str_community  = null;
string ip  = null;
void Start () {
    //test button

    MyButton.onClick.AddListener (() => {
        str_community = community_str.text; 
        ip = agent_ip_address.text;
        Debug.Log (str_community);
        Debug.Log(ip);
        snmp_walk (str_community, ip);
    });
}

// Update is called once per frame
void Update () {

}

void snmp_walk(string str_community, string ip){

    OctetString community = new OctetString (str_community);
    // Define agent parameters class
    AgentParameters param = new AgentParameters (community);
    // Set SNMP version to 1 (or 2)
    // settare in base alla versione usata
    param.Version = SnmpVersion.Ver1;
    // Construct the agent address object
    // IpAddress class is easy to use here because
    //  it will try to resolve constructor parameter if it doesn't *
    //  parse to an IP address
    IpAddress agent = new IpAddress (ip);

    // Construct target
    // IP, port,timeout,retry
    UdpTarget target = new UdpTarget ((IPAddress)agent, 161, 4000, 2);
    //necessario per tutte le richieste
    Pdu pdu = new Pdu (PduType.Get);

    pdu.VbList.Add ("1.3.6.1.2.1.1.1.0"); //sysDescr
    pdu.VbList.Add("1.3.6.1.2.1.1.2.0"); //sysObjectID
    pdu.VbList.Add("1.3.6.1.2.1.1.3.0"); //sysUpTime
    pdu.VbList.Add("1.3.6.1.2.1.1.4.0"); //sysContact
    pdu.VbList.Add("1.3.6.1.2.1.1.5.0"); //sysName
    pdu.VbList.Add ("1.3.6.1.2.1.25.2.2.0"); //Load for one core
    //pdu.VbList.Add ("1.3.6.1.2.1.25.6.3.1.1.11"); //Memory ? occupata
    //pdu.VbList.Add ("1.3.6.1.2.1.25.3.3.1.2.4"); //CPU ?

    SnmpV1Packet result = (SnmpV1Packet)target.Request (pdu, param);


    // If result is null then agent didn't reply or we couldn't parse the reply.
    if (result != null) {
        // ErrorStatus other then 0 is an error returned by 
        // the Agent - see SnmpConstants for error definitions
        if (result.Pdu.ErrorStatus != 0) {
            // agent reported an error with the request
            Debug.Log ("Error in SNMP reply. Error {"+result.Pdu.ErrorStatus+"} " +
                       "index {"+result.Pdu.ErrorIndex+"}");

        } else {
            // Reply variables are returned in the same order as they were added
            //  to the VbList
            Debug.Log ("sysDescr({"+result.Pdu.VbList [0].Oid.ToString ()+"}) " +
                "({"+SnmpConstants.GetTypeName (result.Pdu.VbList [0].Value.Type)+"}): " +
                "{"+result.Pdu.VbList [0].Value.ToString ()+"}"); 


            Debug.Log("sysObjectID({"+result.Pdu.VbList [1].Oid.ToString ()+"}) " +
                      "({"+SnmpConstants.GetTypeName (result.Pdu.VbList [1].Value.Type)+"}): " +
                      "{"+result.Pdu.VbList [1].Value.ToString ()+"}"); 

            Debug.Log("sysUpTime(({"+result.Pdu.VbList [2].Oid.ToString ()+"}) " +
                      "({"+SnmpConstants.GetTypeName (result.Pdu.VbList [2].Value.Type)+"}): " +
                      "{"+result.Pdu.VbList [2].Value.ToString ()+"}"); 

            Debug.Log("sysContact(({"+result.Pdu.VbList [3].Oid.ToString ()+"}) " +
                      "({"+SnmpConstants.GetTypeName (result.Pdu.VbList [3].Value.Type)+"}): " +
                      "{"+result.Pdu.VbList [3].Value.ToString ()+"}"); 

            Debug.Log("sysName(({"+result.Pdu.VbList [4].Oid.ToString ()+"}) " +
                      "({"+SnmpConstants.GetTypeName (result.Pdu.VbList [4].Value.Type)+"}): " +
                      "{"+result.Pdu.VbList [4].Value.ToString ()+"}"); 

            Debug.Log("Total Mem ({"+result.Pdu.VbList [5].Oid.ToString ()+"}) " +
                      "({"+SnmpConstants.GetTypeName (result.Pdu.VbList [5].Value.Type)+"}): " +
                      "{"+result.Pdu.VbList [5].Value.ToString ()+"}"); 

        /*  Debug.Log("CPU ? " + result.Pdu.VbList[6].Oid.ToString()+
                      SnmpConstants.GetTypeName(result.Pdu.VbList[6].Value.Type)+
                      result.Pdu.VbList[6].Value.ToString());*/

        }
    } else {
        Debug.Log ("No response received from SNMP agent.");
    }
    target.Close ();
}

}

感谢您的帮助，对不起我的英语！

Answer 1

默认情况下，安装后，Windows上的SNMP代理仅允许来自localhost的查询。

要允许远程SNMP查询，您需要设置SNMP服务：

打开Windows Services Manager
右键点击SNMP Service并修改Properties
选择Security标签

enter image description here

从此处添加允许查询SNMP代理的远程主机。

修改

我知道这可以回答你问题的一部分：无法从localhost以外的主机查询Windows SNMP Agent。

如何在Linux上安装/配置SNMP代理将是一个完整的其他问题，描述您尝试过的内容和不起作用的内容。

C＃代码审查/调试应发布在SF姐妹网站上：stackoverflow

SNMP代理配置windows / linux

1 个答案: