java snmp协议_snmp属于哪一层协议

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背景

• 控制华为交换机的poe供电与断电来重启PAD

snmp协议使用

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
import lombok.extern.slf4j.Slf4j;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.Integer32;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;

/** * * @description 华为交换机工具类 */
@Slf4j
public class HuaWeiSwitchesSnmpConnection { 
   

  private static final String USERNAME = "tuantimingcheng";


  private static final int DEFAULT_VERSION = SnmpConstants.version2c;
  private static final String DEFAULT_PROTOCOL = "udp";
  private static final int DEFAULT_PORT = 161;
  private static final long DEFAULT_TIMEOUT = 3 * 1000L;
  private static final int DEFAULT_RETRY = 3;


  /** * 根据ｉｐ　和　团体名称创建　团体Ｔａｒｇｅｔ * @param ip * @param community * @return */
  private static CommunityTarget createTarget(String ip, String community) { 
   
    Address targetAddress = GenericAddress.parse(DEFAULT_PROTOCOL + ":" + ip + "/" + DEFAULT_PORT);
    CommunityTarget target = new CommunityTarget(targetAddress, new OctetString(community));
    target.setVersion(DEFAULT_VERSION);
    target.setTimeout(DEFAULT_TIMEOUT);
    target.setRetries(DEFAULT_RETRY);
    return target;
  }

  /** * 获取对应ｉｐ下交换机ｏｉｄ的状态 * * @param ip * @param oid * @return */
  public static int getStatus(String ip, String oid) { 
   
    int status = 0;
    CommunityTarget target = createTarget(ip, USERNAME);
    PDU pdu = new PDU();
    pdu.add(new VariableBinding(new OID(oid)));
    pdu.setType(PDU.GET);
    try { 
   
      Snmp snmp = new Snmp(new DefaultUdpTransportMapping());
      snmp.listen();
      ResponseEvent respEvent = snmp.send(pdu, target);
      if (respEvent != null && respEvent.getResponse() != null) { 
   
        status = respEvent.getResponse().get(0).getVariable().toInt();
      } else { 
   
        // TODO 此处异常状态，需要log
        log.error(
            "SNMP getStatus request time out, Response is null. [ip = " + ip + ", community = "
                + SnmpDevice.PDU_READ_USER + "]");
      }
      snmp.close();
    } catch (IOException e) { 
   
      e.printStackTrace();
      // TODO 此处异常状态，需要log[exception];
      log.error("SNMP getStatus Exception:" + e);
    }
    return status;
  }

  /* 查询ip下oid对应的端口集合 */
  public static List<String> getOidAndPortList(String ip, String oid) { 
   
    CommunityTarget target = createTarget(ip, USERNAME);
    PDU pdu = new PDU();
    List<String> oidAndVariableList = new ArrayList<>();
    String currentOid = oid;
    Vector<VariableBinding> recVBs;
    try { 
   
      Snmp snmp = new Snmp(new DefaultUdpTransportMapping());
      snmp.listen();
      while (true) { 
   
        pdu.add(new VariableBinding(new OID(currentOid)));
        pdu.setType(PDU.GETNEXT);
        ResponseEvent respEvent = snmp.send(pdu, target);
        if (respEvent != null && respEvent.getResponse() != null) { 
   
          recVBs = (Vector<VariableBinding>) respEvent.getResponse()
              .getVariableBindings();
          VariableBinding variableBinding = recVBs.get(recVBs.size() - 1);
          currentOid = variableBinding.getOid().toString();

          if (!oid.equals(currentOid
              .substring(0, currentOid.lastIndexOf(".")))) { 
   
            break;
          }
        }
      }
      for (int i = 0; i < recVBs.size(); i++) { 
   
        if (i != recVBs.size() - 1) { 
   
          oidAndVariableList.add(recVBs.get(i).getOid() + "," + recVBs.get(i).getVariable());
        }
      }
      snmp.close();
    } catch (IOException e) { 
   
      e.printStackTrace();
      // TODO 此处异常状态，需要log[exception];
      log.error("SNMP getStatus Exception:" + e);
    }
    return oidAndVariableList;
  }

  /** * 发送命令方法 * * @param ip 　交换机ｉｐ * @param oid 　发送命令的ｏｉｄ * @param command 　命令参数 * @return */
  public static int setCommand(String ip, String oid, Integer command) { 
   
    int status = 0;
    CommunityTarget target = createTarget(ip, USERNAME);
    PDU pdu = new PDU();
    pdu.add(new VariableBinding(new OID(oid), new Integer32(command)));
    pdu.setType(PDU.SET);
    try { 
   
      Snmp snmp = new Snmp(new DefaultUdpTransportMapping());
      snmp.listen();
      ResponseEvent respEvent = snmp.send(pdu, target);
      if (respEvent != null && respEvent.getResponse() != null) { 
   
        int result = respEvent.getResponse().get(0).getVariable().toInt();
        if (result == command) { 
   
          // 命令执行成功！
          status = 1;
        }
      } else { 
   
        // TODO 此处异常状态，需要log
        System.out.println(
            "SNMP sent command request time out, Response is null. [ip = " + ip + ", community = "
                + SnmpDevice.PDU_WRITE_USER + "]");
      }
      snmp.close();
    } catch (IOException e) { 
   
      e.printStackTrace();
      // TODO 此处异常状态，需要log[exception];
      System.out.println("SNMP sent command Get Exception:" + e);
    }
    return status;
  }

  private static final String HUA_WEI_OID = "1.3.6.1.4.1.2011.5.25.195.3.1.6";

  private static final String HUA_WEI_OID_SWITCH = "1.3.6.1.4.1.2011.5.25.195.3.1.15.23";

  /*　切换管理方式　*/
  private static final String HUA_WEI_MANAGEMENT = "1.3.6.1.4.1.2011.5.25.195.2.1.8.0";

  public static void main(String[] args) { 
   
    String ip = "192.168.0.196";

    //切换管理方式 1.手动管理　　２．自动管理
    HuaWeiSwitchesSnmpConnection.setCommand(ip, HUA_WEI_MANAGEMENT, 1);

    //控制开关　１．关机　　２．开机

    HuaWeiSwitchesSnmpConnection.setCommand(ip, HUA_WEI_OID_SWITCH, 1);

    try { 
   
      Thread.sleep(4000);
    } catch (InterruptedException e) { 
   
      e.printStackTrace();
    }

    HuaWeiSwitchesSnmpConnection.setCommand(ip, HUA_WEI_OID_SWITCH, 2);

    //获取Oid和port
    /*List<String> status = HuaWeiSwitchesSnmpConnection.getOidAndPortList(ip, HUA_WEI_OID_SWITCH); for (String message : status) { System.out.println(message); }*/
    int status1 = HuaWeiSwitchesSnmpConnection.getStatus(ip, HUA_WEI_OID_SWITCH);
    System.out.println(status1);
  }
}