Question

我正在尝试在JAVA中创建一个SNMP客户端。

SNMPManager client = new SNMPManager("udp:73.251.102.191/162");

这对ipv4地址有好处，但是当我尝试对ipv6地址执行相同操作时，会抛出以下错误。

错误：

---------------Exception in thread "main" org.snmp4j.MessageException: No route to host
at org.snmp4j.MessageDispatcherImpl.sendPdu(Unknown Source)
at org.snmp4j.Snmp.sendMessage(Unknown Source)
at org.snmp4j.Snmp.send(Unknown Source)
at org.snmp4j.Snmp.send(Unknown Source)
at snmpTrial1.SNMPManager.get(SNMPManager.java:55)
at snmpTrial1.SNMPManager.getAsString(SNMPManager.java:45)
at snmpTrial1.SNMPManager.main(SNMPManager.java:34)

代码：此代码适用于ipv4地址，但不适用于ipv6

public class SNMPManager {
Snmp snmp = null;
String address = null;
public SNMPManager(String add)
{
    address = add;
}
public static void main(String[] args) throws IOException {
    SNMPManager client = new SNMPManager("udp:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX/162"); // ipv6 address
    client.start();
    String sysDescr = client.getAsString(new OID(".1.3.6.1.4.1.4115.1.20.1.1.3.62.4.1.1.1"));
    System.out.println(sysDescr);
}
private void start() throws IOException {
    TransportMapping transport = new DefaultUdpTransportMapping();
    snmp = new Snmp(transport);
    transport.listen();
}

public String getAsString(OID oid) throws IOException {
    ResponseEvent event = get(new OID[] { oid });
    return event.getResponse().get(0).getVariable().toString();
}
public ResponseEvent get(OID oids[]) throws IOException {
    PDU pdu = new PDU();
    for (OID oid : oids) {
        pdu.add(new VariableBinding(oid));
    }
    pdu.setType(PDU.GET);
    ResponseEvent event = snmp.send(pdu, getTarget(), null);
    if(event != null) {
        return event;
    }
    throw new RuntimeException("GET timed out");
}
private Target getTarget() {
    Address targetAddress = GenericAddress.parse(address);
    CommunityTarget target = new CommunityTarget();
    target.setCommunity(new OctetString("xxxxx"));
    target.setAddress(targetAddress);
    target.setRetries(2);
    target.setTimeout(2000);
    target.setVersion(SnmpConstants.version2c);
    return target;
}

}

Answer 1

如果您的操作系统是MAC OSX，则Java 7和8存在与IPv6和套接字连接相关的错误。这里是链接：jvm bug Java 6似乎工作正常。

Answer 2

我找到了解决方案。对于ipv6地址，我们应该具有如下格式 GenericAddress.parse（＆＃34; UDP：[XXXX：XXXX：XXXX：XXXX：XXXX：XXXX：XXXX：XXXX] / 162＆＃34）;

这对我有用。

在JAVA中使用SNMP4j为ipv6地址创建SNMP客户端

2 个答案: