/// <summary>
/// 暴露给上层，通过物理端口发送数据包
/// </summary>
/// <param name="PhyPortNo">物理端口号</param>
/// <param name="buffer">发送内容</param>
public static Const.EN_RET_CODE SendViaPhyPort(int PhyPortNo, byte[] buffer)
{
if (buffer.Length > Const.MAX_PACKET_LENGTH)
{
return(Const.EN_RET_CODE.EN_RET_PACKET_LENGTH_OVERFOLW);
}
Const.EN_RET_CODE retVal = Const.EN_RET_CODE.EN_RET_INIT;
retVal = PhyPortManager.GetInstance().SendTo(PhyPortNo, buffer);
return(retVal);
}
/// <summary>
/// 获取单例
/// </summary>
/// <returns></returns>
public static PhyPortManager GetInstance()
{
if (null == instance)
{
lock (objLock)
{
//解锁后可能其他线程已经新建了一个实例，所以需要重新判断
if (null == instance)
{
instance = new PhyPortManager();
}
}
}
return(instance);
}
/// <summary>
/// 监听socket函数，调用
/// </summary>
private void ListenerHandleFunc()
{
byte[] buffer = new byte[Const.MAX_PACKET_LENGTH];
while (true)
{
if (this.listenerSocket == null || this.listenerSocket.Available < 1)
{
Thread.Sleep(20);
continue;
}
int length = 0;
try
{
length = this.listenerSocket.ReceiveFrom(buffer, ref this.epRemotePoint);
}
catch (SocketException)
{
//在SendTo的目的端口没有Socket在监听，或原有的监听Socket被关闭时，这里监听会抛出10054异常
//Console.WriteLine("SocketException" + ex.ErrorCode);
continue;
}
//如果接收到数据的是从监听端口发出的，如果来自控制器，则调用处理函数；否则放入消息队列
if (((IPEndPoint)this.epRemotePoint).Port == this.listenPort)
{
PacketInfo packetInfo = new PacketInfo(this.listenerNo, buffer);
//物理端口0，来自控制器的消息
if (this.listenerNo == 0)
{
PhyPortManager.GetInstance().HandleReceive(packetInfo);
}
else
{
//P操作
Program.PktQueueMutex.WaitOne();
//写队列
Program.PacketQueue.Enqueue(packetInfo);
//V操作
Program.PktQueueMutex.ReleaseMutex();
}
}
}
}
/// <summary>
/// 从文件中初始化拓扑结构
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public static Const.EN_RET_CODE InitFromFile(string fileName)
{
XmlDocument doc = new XmlDocument();
try
{
doc.Load(fileName);
}catch (Exception)
{
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, fileName + "拓扑结构文件不存在！");
return(Const.EN_RET_CODE.EN_RET_FILE_NOT_EXIST);
}
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_INFO, "读取拓扑文件");
//记录当前交换机的ID在pair中的下标
int selfIndexInPair = Const.INVALID_NUM;
try
{
XmlElement root = doc.DocumentElement;
//遍历所有pair
XmlNodeList pairList = root.GetElementsByTagName("pair");
foreach (XmlNode PairNode in pairList)
{
string strID0;
string strID1;
string strPhyPortNo;
string strLocalPortNum;
string strRemotePortNum;
int iPhyPortNo = Const.INVALID_NUM;
int iLocalPortNum = Const.INVALID_NUM;
int iRemotePortNum = Const.INVALID_NUM;
XmlNodeList switchList = ((XmlElement)PairNode).GetElementsByTagName("switch");
strID0 = ((XmlElement)switchList[0]).GetElementsByTagName("id")[0].InnerText;
strID1 = ((XmlElement)switchList[1]).GetElementsByTagName("id")[0].InnerText;
//检测pair 中是否有某个交换机ID和当前交换机的ID相同
if (strID0 == Program.iCurSwitchID.ToString())
{
selfIndexInPair = 0;
}
else if (strID1 == Program.iCurSwitchID.ToString())
{
selfIndexInPair = 1;
}
else
{
selfIndexInPair = Const.INVALID_NUM;
continue;
}
//pair 中某个交换机ID和当前交换机的ID相同
if (selfIndexInPair != Const.INVALID_NUM)
{
strPhyPortNo = ((XmlElement)switchList[selfIndexInPair]).GetElementsByTagName("PhyPortNo")[0].InnerText;
strLocalPortNum = ((XmlElement)switchList[selfIndexInPair]).GetElementsByTagName("LocalPortNum")[0].InnerText;
strRemotePortNum = ((XmlElement)switchList[(selfIndexInPair + 1) % 2]).GetElementsByTagName("LocalPortNum")[0].InnerText;
//String转int失败，说明xml数据格式错误，直接抛出异常
if (!int.TryParse(strPhyPortNo, out iPhyPortNo) || !int.TryParse(strLocalPortNum, out iLocalPortNum) ||
!int.TryParse(strRemotePortNum, out iRemotePortNum))
{
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "string转int失败");
throw new Exception("xml格式错误");
}
//转换后数值不在规定大小内，同样视为格式不正确，直接抛出异常
if (iPhyPortNo > Const.MAX_PHY_PORT_NUM || iPhyPortNo < Const.MIN_PHY_PORT_NUM ||
iLocalPortNum > Const.MAX_PORT_NUM || iLocalPortNum < Const.MIN_PORT_NUM ||
iRemotePortNum > Const.MAX_PORT_NUM || iRemotePortNum < Const.MIN_PORT_NUM)
{
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "值不在范围内");
throw new Exception("xml格式错误");
}
//增加物理端口
Const.EN_RET_CODE retVal = Const.EN_RET_CODE.EN_RET_INIT;
retVal = PhyPortManager.GetInstance().AddPort(iPhyPortNo, iRemotePortNum, iLocalPortNum);
if (retVal != Const.EN_RET_CODE.EN_RET_SUCC)
{
//TODO
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "增加物理端口失败");
return(retVal);
}
}
}
//string转int成功标志
bool boolTryParseResult = false;
//遍历controller标签
XmlNodeList controllerList = root.GetElementsByTagName("controller");
foreach (XmlNode ctrlNode in controllerList)
{
string strSwitchID = ((XmlElement)ctrlNode).GetElementsByTagName("switchID")[0].InnerText;
if (Program.iCurSwitchID.ToString() != strSwitchID)
{
continue;
}
string strSwitchPort = ((XmlElement)ctrlNode).GetElementsByTagName("switchPort")[0].InnerText;
string strControllerPort = ((XmlElement)ctrlNode).GetElementsByTagName("controllerPort")[0].InnerText;;
int iSwitchPort = Const.INVALID_NUM;
int iControllerPort = Const.INVALID_NUM;
boolTryParseResult = int.TryParse(strSwitchPort, out iSwitchPort);
if (boolTryParseResult != true)
{
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "交换机端口号转换整型变量失败");
return(Const.EN_RET_CODE.EN_RET_INT_TRY_PARSE_ERR);
}
boolTryParseResult = int.TryParse(strControllerPort, out iControllerPort);
if (boolTryParseResult != true)
{
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "控制器端口号转换整型变量失败");
return(Const.EN_RET_CODE.EN_RET_INT_TRY_PARSE_ERR);
}
//增加物理端口，监听控制器发送的数据，默认控制器连接交换机的0端口
Const.EN_RET_CODE retVal = Const.EN_RET_CODE.EN_RET_INIT;
retVal = PhyPortManager.GetInstance().AddPort(Const.PHY_PORT_FOR_CONTROLLER, iControllerPort, iSwitchPort);
if (retVal != Const.EN_RET_CODE.EN_RET_SUCC)
{
//TODO
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "连接控制器失败");
return(retVal);
}
}
//遍历Host标签
XmlNodeList hostList = root.GetElementsByTagName("Host");
foreach (XmlNode hostNode in hostList)
{
string strSwitchID = ((XmlElement)hostNode).GetElementsByTagName("switchID")[0].InnerText;
if (Program.iCurSwitchID.ToString() != strSwitchID)
{
continue;
}
string strSwitchPort = ((XmlElement)hostNode).GetElementsByTagName("switchPort")[0].InnerText;
string strSwitchPhyPortNum = ((XmlElement)hostNode).GetElementsByTagName("PhyPortNo")[0].InnerText;
string strHostPort = ((XmlElement)hostNode).GetElementsByTagName("HostPort")[0].InnerText;
int iSwitchPort = Const.INVALID_NUM;
int iSwitchPhyPortNum = Const.INVALID_NUM;
int iHostPort = Const.INVALID_NUM;
boolTryParseResult = int.TryParse(strSwitchPort, out iSwitchPort);
if (boolTryParseResult != true)
{
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "交换机端口号转换整型变量失败");
return(Const.EN_RET_CODE.EN_RET_INT_TRY_PARSE_ERR);
}
boolTryParseResult = int.TryParse(strSwitchPhyPortNum, out iSwitchPhyPortNum);
if (boolTryParseResult != true)
{
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "交换机物理端口号转换整型变量失败");
return(Const.EN_RET_CODE.EN_RET_INT_TRY_PARSE_ERR);
}
boolTryParseResult = int.TryParse(strHostPort, out iHostPort);
if (boolTryParseResult != true)
{
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "主机端口号转换整型变量失败");
return(Const.EN_RET_CODE.EN_RET_INT_TRY_PARSE_ERR);
}
//增加物理端口，监听主机发送的消息
Const.EN_RET_CODE retVal = Const.EN_RET_CODE.EN_RET_INIT;
retVal = PhyPortManager.GetInstance().AddPort(iSwitchPhyPortNum, iHostPort, iSwitchPort);
if (retVal != Const.EN_RET_CODE.EN_RET_SUCC)
{
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "连接主机失败");
return(retVal);
}
}
}
catch (Exception)
{
Util.Log(Util.EN_LOG_LEVEL.EN_LOG_FATAL, "Xml格式错误");
return(Const.EN_RET_CODE.EN_XML_FILE_FORMAT_ERR);
}
return(Const.EN_RET_CODE.EN_RET_SUCC);
}