/// <summary>
/// 探测网络拓扑全过程，应该要在新线程中工作，后面改
/// </summary>
private void StartDetecNetwork(Object stateInfo)
{
string strIP;
VbCollection equipInfo;
AddMessage("网络拓扑探测和绘制开始");
while (WaitForDetectList.Count > 0)
{
if (!isDetecting)
{
AddMessage("网络拓扑探测和绘制被强制结束");
return;
}
WaitForDetectInfomation waitInfo = WaitForDetectList[0];
IpAddress ip = waitInfo.Ip;
Equipment lastEquip = waitInfo.Equip;
int step = waitInfo.Step;
WaitForDetectList.RemoveAt(0);
//需要获取的单个snmp变量信息包括设备描述、objectid（enterprises.311.1.1.3.1.2，可用来判断设备厂家，待验证）
/*objectid验证整理 enterprises = 1.3.6.1.4.1
* 虚拟机2003操作系统：enterprises.311.1.1.3.1.2
*/
if (ipAlreadyFindList.ContainsKey(ip))
{ //这里应该不可能执行到，试一下
// MessageBox.Show("这里应该不可能执行到，试一下");
// continue;
//下一跳设备已经存在，只画线即可
if (ipAlreadyFindList[ip].Equip.AdminIPAddress.ToString() == "67.250.5.1" && lastEquip.AdminIPAddress.ToString() == "3.250.5.1")
{
}
DrawLine(ipAlreadyFindList[ip].Equip, lastEquip);
AddMessage("直接画线" + ip.ToString() + "到" + lastEquip.AdminIPAddress.ToString());
continue;
}
equipInfo = SnmpHelper.GetResultsFromOids(ip, equipInfoRequestOids, out tipMessage);
if (equipInfo == null)
{
AddMessage(string.Format("出错，错误信息：{0}", tipMessage));
AddMessage(string.Format("SNMP获取ip:{0}设备system信息失败，进入下一轮", ip.ToString()));
continue;
}
string sysDescr = equipInfo[0].Value.ToString();
string sysObjectID = equipInfo[1].Value.ToString();
byte sysServices = Convert.ToByte(equipInfo[2].Value.ToString());//可以根据此值尝试获取设备类型，当数据库中没有值的时候使用此猜测值。
//开始建立ucequip，equipment，搜索静态列表是否有这个设备，取得名字等信息
strIP = ip.ToString();
Equipment equip = GetEquipment(strIP, sysDescr, lastEquip);
equip.EquipBrand = SnmpHelper.GetBrandFromObjectID(sysObjectID);
if (equip == null)
{
AddMessage(string.Format("SNMP获取ip:{0}设备信息失败，进入下一轮", strIP));
continue;
}
equipAlreadyFindList.Add(equip.Index, equip);
AddMessage("发现设备信息，设备名称：" + equip.Name);
UCEquipIcon ucEquipIcon = GetUCEquipIcon(equip);
if (ucEquipIcon == null)
{
AddMessage(string.Format("添加设备{0}图标、定位失败，进入下一轮", strIP));
continue;
}
AddMessage(string.Format("添加设备图标，坐标x:{0}，y:{1}", equip.X, equip.Y));
//GetTextBlock(ucEquipIcon);
FilterRouteInfo(equip, step);
if (equip.AdminIPAddress.ToString() == "67.250.5.1" && lastEquip.AdminIPAddress.ToString() == "3.250.5.1")
{
}
if (lastEquip != null)
{
DrawLine(equip, lastEquip);
}
}
IsDetecting = false;
AddMessage("网络拓扑发现和绘制完毕");
}
private void ConstructListByIP(IpAddress agentIP, string equipName)
{
if (string.IsNullOrEmpty(equipName))
{
try
{
equipName = App.idAndEquipList[App.ipAndIPinfoList[agentIP.ToString()].EquipIndex].Name;
}
catch { }
}
ocInterfaces.Clear();
OctetString community = new OctetString(App.snmpCommunity);
AgentParameters param = new AgentParameters(community);
param.DisableReplySourceCheck = !App.snmpCheckSrcFlag;
// Set SNMP version to 2 (GET-BULK only works with SNMP ver 2 and 3)
param.Version = SnmpVersion.Ver2;
// Construct target
UdpTarget target = new UdpTarget((IPAddress)agentIP, App.snmpPort, App.snmpTimeout, App.snmpRetry);
// Define Oid that is the root of the MIB
// tree you wish to retrieve
Oid rootOid = new Oid("1.3.6.1.2.1.2.2.1.1"); // ifIndex
// This Oid represents last Oid returned by
// the SNMP agent
Oid lastOid = (Oid)rootOid.Clone();
// Pdu class used for all requests
Pdu pdu = new Pdu(PduType.GetBulk);
// In this example, set NonRepeaters value to 0
pdu.NonRepeaters = 0;
// MaxRepetitions tells the agent how many Oid/Value pairs to return
// in the response.
pdu.MaxRepetitions = 5;
// Loop through results
while (lastOid != null)
{
// When Pdu class is first constructed, RequestId is set to 0
// and during encoding id will be set to the random value
// for subsequent requests, id will be set to a value that
// needs to be incremented to have unique request ids for each
// packet
if (pdu.RequestId != 0)
{
pdu.RequestId += 1;
}
// Clear Oids from the Pdu class.
pdu.VbList.Clear();
// Initialize request PDU with the last retrieved Oid
pdu.VbList.Add(lastOid);
// Make SNMP request
SnmpV2Packet result = null;
try
{
result = (SnmpV2Packet)target.Request(pdu, param);
}
catch (Exception ex)
{
MessageBox.Show("获取SNMP应答出现错误\n" + ex.Message);
target.Close();
return;
}
// You should catch exceptions in the Request if using in real application.
// 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
MessageBox.Show(string.Format("SNMP应答数据包中有错误。 Error {0} index {1}", result.Pdu.ErrorStatus, result.Pdu.ErrorIndex));
lastOid = null;
break;
}
else
{
// Walk through returned variable bindings
foreach (Vb v in result.Pdu.VbList)
{
// Check that retrieved Oid is "child" of the root OID
if (rootOid.IsRootOf(v.Oid))
{
if (v.Value.Type == SnmpConstants.SMI_ENDOFMIBVIEW)
{
lastOid = null;
}
else
{
lastOid = v.Oid;
}
Integer32 f = v.Value as Integer32;
Interface intf = new Interface(agentIP);
intf.EquipName = equipName;
//intf.TimerInteral = double.Parse(cbbTimerInterval.Text);
ocInterfaces.Add(f, intf);
}
else
{
// we have reached the end of the requested
// MIB tree. Set lastOid to null and exit loop
lastOid = null;
break; // 每个数据包获取5个值，一旦有一个不是这一列的数据，后面的应该都不是了
}
}
}
}
else
{
MessageBox.Show("指定网管代理未返回有效信息");
}
}
target.Close();
string errorMessage;
foreach (Integer32 i in ocInterfaces.Keys)
{
string strOid = "1.3.6.1.2.1.2.2.1.2." + i.ToString();
VbCollection vbc = SnmpHelper.GetResultsFromOids(agentIP, new string[] { strOid }, out errorMessage);
ocInterfaces[i].Descr = vbc[0].Value.ToString();
ocInterfaces[i].IfIndex = i;
}
}