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public Walk ( SnmpVersion version, string rootOid ) : AsnType>.Dictionary |
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| version | SnmpVersion | SNMP protocol version. Acceptable values are SnmpVersion.Ver1 and /// SnmpVersion.Ver2 |
| rootOid | string | OID to start WALK operation from. Only child OIDs of the rootOid will be /// retrieved and returned |
| return | AsnType>.Dictionary | |
/// <summary>
/// 读取根节点
/// </summary>
/// <param name="Ip">ip地址</param>
/// <param name="outinfo">输出到那个字典</param>
public void SnmpAgent(Dictionary<string, List<string>> Ip_OID, Dictionary<string, Dictionary<string, string>> outinfo)
{
#region 新方法
foreach (KeyValuePair<string, List<string>> MyKVP in Ip_OID)
{
try
{
SimpleSnmp snmp = new SimpleSnmp(MyKVP.Key, "public");
if (!snmp.Valid)
{
continue;
}
Dictionary<string, string> Info = new Dictionary<string, string>();
VbCollection col = new VbCollection();
TrapAgent agent = new TrapAgent();
foreach (string bc in MyKVP.Value)
{
Dictionary<Oid, AsnType> result = snmp.Walk(SnmpVersion.Ver2, bc);
if (result == null)
{
continue;
}
foreach (KeyValuePair<Oid, AsnType> kvp in result)
{
try
{
if (!Info.ContainsKey(kvp.Key.ToString()))
{
Info.Add(kvp.Key.ToString(), kvp.Value.ToString());
}
else
{
Info.Remove(kvp.Key.ToString());
Info.Add(kvp.Key.ToString(), kvp.Value.ToString());
}
}
catch (Exception ex)
{
msg.SaveTempMessage(ex.Source.ToString(), ex.Message.ToString(), DateTime.Now.ToString());
}
}
}
if (!outinfo.ContainsKey(MyKVP.Key))
{
outinfo.Add(MyKVP.Key, Info);
}
else
{
outinfo.Remove(MyKVP.Key);
outinfo[MyKVP.Key] = Info;
}
}
catch (Exception ex)
{
msg.SaveTempMessage(ex.Source.ToString(), ex.Message.ToString(), DateTime.Now.ToString());
}
}
#endregion
}
private void WaitForCurrentConnectionsToDrain(string farm, string server, string snmpEndpoint, int snmpPort, string snmpCommunity, DateTime timeout)
{
if (DateTime.Now > timeout)
throw new ConDepLoadBalancerException(string.Format("Timed out while taking {0} offline in load balancer.", server));
Logger.Verbose("Connecting to snmp using " + snmpEndpoint + " on port " + snmpPort + " with community " + snmpCommunity);
var snmp = new SimpleSnmp(snmpEndpoint, snmpPort, snmpCommunity);
Logger.Verbose("Getting snmp info about farm " + farm);
var farmResult = snmp.Walk(SnmpVersion.Ver2, FARM_NAMES_OID);
var farmOid = farmResult.Single(x => x.Value.Clone().ToString() == farm);
var id = farmOid.Key.ToString();
var start = farmOid.Key.ToString().LastIndexOf(".");
var farmSubId = id.Substring(start + 1, id.Length - start - 1);
Logger.Verbose("Getting snmp info about server " + server);
var serverResult = snmp.Walk(SnmpVersion.Ver2, SERVER_NAMES_OID + farmSubId);
var serverOid = serverResult.Single(x => x.Value.Clone().ToString() == server);
var serverId = serverOid.Key.ToString();
start = serverOid.Key.ToString().LastIndexOf(".");
var serverSubId = serverId.Substring(start + 1, serverId.Length - start - 1);
Logger.Verbose("Getting current server sessions for server " + server);
var pdu = Pdu.GetPdu();
pdu.VbList.Add(SERVER_CUR_SESSIONS_OID + farmSubId + "." + serverSubId);
var currentSessionsVal = snmp.Get(SnmpVersion.Ver2, pdu);
var val = currentSessionsVal.Single().Value.Clone() as Counter64;
if (val > 0)
{
Logger.Verbose("Server " + server + " has " + val + " active sessions.");
var waitInterval = 3;
Logger.Warn(string.Format("There are still {0} active connections on server {1}. Waiting {2} second before retry.", val, server, waitInterval));
Thread.Sleep(1000 * waitInterval);
WaitForCurrentConnectionsToDrain(farm, server, snmpEndpoint, snmpPort, snmpCommunity, timeout);
}
Logger.Verbose("Server " + server + " has 0 active session and is now offline.");
}
public bool SnmpWalkTest(string host, string community, string oid)
{
try
{
SimpleSnmp snmp = new SimpleSnmp(host, community);
if (!snmp.Valid)
{
return false;
}
Dictionary<Oid, AsnType> result = snmp.Walk(SnmpVersion.Ver2,
oid);
if (result == null)
{
return false;
}
LogResult(result);
return true;
}
catch (Exception ex)
{
return false;
}
}
private void SNMPGetInfo()
{
if (this.krbSNMP.Checked)
{
try
{
SimpleSnmp snmp = new SimpleSnmp(Properties.Settings.Default.ip, this.kcbCommunity.SelectedItem.ToString());
snmp.Retry = 5;
snmp.Timeout = 60000;
snmp.SuppressExceptions = false;
string oid = Properties.Settings.Default.oid;
Dictionary<Oid, AsnType> result = null;
if (this.kcbMethod.SelectedItem.ToString() == "Get NEXT")
{
Pdu pdu = new Pdu();
pdu.Type = PduType.GetNext;
pdu.VbList.Add(oid);
result = snmp.GetNext(SnmpVersion.Ver1, pdu);
}
else if (this.kcbMethod.SelectedItem.ToString() == "GET")
{
// Create a request Pdu
Pdu pdu = new Pdu();
pdu.Type = PduType.Get;
pdu.VbList.Add(oid);
result = snmp.GetNext(SnmpVersion.Ver1, pdu);
}
else if (this.kcbMethod.SelectedItem.ToString() == "Walk")
{
result = snmp.Walk(SnmpVersion.Ver2, oid);
}
else if (this.kcbMethod.SelectedItem.ToString() == "Get BULK")
{
//Using GetBulk
Pdu pdu = new Pdu();
pdu.Type = PduType.GetBulk;
pdu.VbList.Add(oid);
pdu.NonRepeaters = 0;
pdu.MaxRepetitions = Convert.ToInt32(this.krypTxtBxRepeaters.Text);
result = snmp.GetBulk(pdu);
}
ktbResult.SuspendLayout();
ktbResult.Clear();
if (result == null)
{
ktbResult.AppendText("Request failed.\r\n");
}
else
{
ktbResult.SuspendLayout();
foreach (KeyValuePair<Oid, AsnType> entry in result)
{
ktbResult.AppendText(String.Format("{0} = {1}: {2}\r\n", entry.Key.ToString(), SnmpConstants.GetTypeName(entry.Value.Type),
entry.Value.ToString()));
}
ktbResult.ResumeLayout();
}
}
catch (Exception snmpEx)
{
ComponentFactory.Krypton.Toolkit.KryptonMessageBox.Show(snmpEx.Message,
"SNMP Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
ktbResult.Focus();
ktbResult.SelectionStart = 0;
ktbResult.SelectionLength = 0;
ktbResult.ScrollToCaret();
ktbResult.ResumeLayout();
}
}
public static Dictionary<Oid, AsnType> Walk(string ip, string oid, int port = 161, int timeout = 2000, int retries = 1)
{
var snmp = new SimpleSnmp(ip, port, "s3cur3", timeout, retries);
return snmp.Walk(SnmpVersion.Ver2, oid);
}