public void readfile()
{
try
{
filelock.EnterReadLock();
records.Clear();
int ttl;
StreamReader sr = new StreamReader(filepath, true);
string nextline = null;
string[] str = null;
while ((nextline = sr.ReadLine()) != null)
{
str = nextline.Split(' ');
int.TryParse(str[2], out ttl);
MacRecord record = new MacRecord(str[0], str[1], ttl);
records.Add(record);
}
sr.Close();
}
catch (Exception ex)
{
Console.Write(ex.Message);
}
finally
{
filelock.ExitReadLock();
}
}
public void recv(object socketclientpara)
{
Socket socketReciver = socketclientpara as Socket;
while (true)
{
//创建一个内存缓冲区，其大小为1024*1024字节 即1M
byte[] arrServerRecMsg = new byte[1024 * 1024];
//将接收到的信息存入到内存缓冲区，并返回其字节数组的长度
try
{
int length = socketReciver.Receive(arrServerRecMsg);
//将机器接受到的字节数组转换为人可以读懂的字符串
string strSRecMsg = Encoding.UTF8.GetString(arrServerRecMsg, 0, length);
string[] frame = strSRecMsg.Split('@');
if (frame[0] == "11")
{
_syncContext.Post(updateMessage, "端口" + getPortByIp(socketReciver) + ":" + strSRecMsg + "\r\n");
_syncContext.Post(updateMessage, "查表中......\r\n");
readfile();
bool hasS = false;
bool hasD = false;
string dPort = null;
foreach (MacRecord rec in records)
{
rec.Ttl = rec.Ttl - 1;
//如果是源端口或者目的端口，重置为5
if (rec.Mac == frame[1] || rec.Mac == frame[2])
{
hasS = true;
rec.Ttl = 5;
}
}
for (int i = 0; i < records.Count; i++)
{
if (records[i].Ttl <= 0)
{
records.RemoveAt(i);
}
}
//如果源Mac记录不存在，则写入Mac表中
if (hasS == false)
{
MacRecord newRec = new MacRecord(frame[1], getPortByIp(socketReciver), 5);
records.Add(newRec);
_syncContext.Post(updateMessage, "Mac表中不存在源Mac,添加源Mac" + frame[1] + "\r\n");
}
foreach (MacRecord rec in records)
{
if (rec.Mac == frame[2])
{
hasD = true;
dPort = rec.Port;
break;
}
}
if (hasD == true)
{
//mac表中有目的mac
_syncContext.Post(updateMessage, "Mac表中存在目的Mac,转发到端口" + dPort + "\r\n");
int i = 1;
foreach (KeyValuePair <string, Socket> item in clientConnectionItems)
{
if (i.ToString() == dPort)
{
item.Value.Send(Encoding.UTF8.GetBytes("11@" + frame[1] + "@" + frame[2] + "@" + frame[3]));
}
i++;
}
}
else
{
//mac表中没有目的mac,广播
_syncContext.Post(updateMessage, "Mac表中没有目的Mac,广播\r\n");
//connector.Send(Encoding.UTF8.GetBytes(strSRecMsg));
int i = 1;
foreach (KeyValuePair <string, Socket> item in clientConnectionItems)
{
if (i == clientConnectionItems.Count)
{
//广播给其他Switcher
item.Value.Send(Encoding.UTF8.GetBytes("10@" + frame[1] + "@" + frame[2] + "@" + frame[3]));//交给交换机
}
else
{
//广播给客户
item.Value.Send(Encoding.UTF8.GetBytes("00@" + frame[1] + "@" + frame[2] + "@" + frame[3]));
}
i++;
}
}
writefile();
}
else if (frame[0] == "10")
{
//代理另一个交换机的广播请求
_syncContext.Post(updateMessage, "端口" + getPortByIp(socketReciver) + ":" + strSRecMsg + "\r\n");
_syncContext.Post(updateMessage, "查表中......\r\n");
readfile();
bool hasS = false;
bool hasD = false;
string dPort = null;
foreach (MacRecord rec in records)
{
rec.Ttl = rec.Ttl - 1;
if (rec.Mac == frame[1] || rec.Mac == frame[2])
{
hasS = true;
rec.Ttl = 5;
}
}
for (int i = 0; i < records.Count; i++)
{
if (records[i].Ttl <= 0)
{
records.RemoveAt(i);
}
}
//如果源Mac记录不存在，则写入Mac表中
if (hasS == false)
{
MacRecord newRec = new MacRecord(frame[1], getPortByIp(socketReciver), 5);
records.Add(newRec);
_syncContext.Post(updateMessage, "Mac表中不存在源Mac,添加源Mac" + frame[1] + "\r\n");
}
foreach (MacRecord rec in records)
{
if (rec.Mac == frame[2])
{
hasD = true;
dPort = rec.Port;
break;
}
}
if (hasD == true)
{
//mac表中有目的mac,单点传送
_syncContext.Post(updateMessage, "Mac表中存在目的Mac,转发到端口" + dPort + "\r\n");
int i = 1;
foreach (KeyValuePair <string, Socket> item in clientConnectionItems)
{
if (i.ToString() == dPort)
{
item.Value.Send(Encoding.UTF8.GetBytes("11@" + frame[1] + "@" + frame[2] + "@" + frame[3]));
}
i++;
}
//告诉另一个switcher,我的mac表中有此目的mac
getSwitcher().Send(Encoding.UTF8.GetBytes("01@" + frame[2]));
}
else
{
//mac表中没有目的mac,代广播
_syncContext.Post(updateMessage, "Mac表中没有目的Mac,广播\r\n");
//connector.Send(Encoding.UTF8.GetBytes(strSRecMsg));
int i = 1;
foreach (KeyValuePair <string, Socket> item in clientConnectionItems)
{
/*if (i != clientConnectionItems.Count) {
* //发送代广播信息，但不发给传来的switcher,避免环
* item.Value.Send(Encoding.UTF8.GetBytes("10@"+frame[1]+"@"+frame[2]+"@"+frame[3]));
* }*/
if (item.Value != socketReciver)
{
item.Value.Send(Encoding.UTF8.GetBytes("10@" + frame[1] + "@" + frame[2] + "@" + frame[3]));
}
i++;
}
}
writefile();
}
else if (frame[0] == "01")
{
//收到了广播的响应
readfile();
_syncContext.Post(updateMessage, "端口" + getPortByIp(socketReciver) + "响应了广播,");
MacRecord newRec = new MacRecord(frame[1], getPortByIp(socketReciver), 5);
records.Add(newRec);
_syncContext.Post(updateMessage, "添加目的Mac: " + frame[1] + "到表中\r\n");
writefile();
}
else if (frame[0] == "00")
{
readfile();
//收到了代理广播的响应
_syncContext.Post(updateMessage, "端口" + getPortByIp(socketReciver) + "响应了广播");
_syncContext.Post(updateMessage, strSRecMsg + "\r\n");
MacRecord newRec = new MacRecord(frame[1], getPortByIp(socketReciver), 5);
records.Add(newRec);
_syncContext.Post(updateMessage, "转发并添加目的Mac:" + frame[1] + "到表中\r\n");
//响应交换机的代理信息
getSwitcher().Send(Encoding.UTF8.GetBytes("01@" + frame[1]));
writefile();
}
}
catch (Exception ex)
{
if (socketReciver != null)
{
//提示套接字监听异常
_syncContext.Post(updateMessage, "端口" + socketReciver.RemoteEndPoint + "已经中断连接" + "\r\n" + ex.Message + "\r\n" + ex.StackTrace + "\r\n");
//Console.WriteLine("客户端" + socketReciver.RemoteEndPoint + "已经中断连接" + "\r\n" + ex.Message + "\r\n" + ex.StackTrace + "\r\n");
//关闭之前accept出来的和客户端进行通信的套接字
socketReciver.Close();
}
break;
}
}
}
