void ClientConnectCB(IAsyncResult ar)
{
try
{
//结束连接,返回的Socket其实是连接上客户端的Socket，即这个Socket可以访问到客户端的数据
Socket clientSkt = skt.EndAccept(ar);
T session = new T();
//开始接受数据
session.StartRcvData(clientSkt, () =>
{
//如果在List中已经包含了该会话，则将该会话移除
if (sessionLst.Contains(session))
{
sessionLst.Remove(session);
}
});
//将该会话加入到list中
sessionLst.Add(session);
}
catch (Exception e)
{
PETool.LogMsg(e.Message, LogLevel.Error);
}
//再次开启以接收下一次的客户端访问
skt.BeginAccept(new AsyncCallback(ClientConnectCB), skt);
}
/// <summary>
/// Launch Client
/// </summary>
public void StartAsClient(string ip, int port)
{
try {
skt.BeginConnect(new IPEndPoint(IPAddress.Parse(ip), port), new AsyncCallback(ServerConnectCB), skt);
PETool.LogMsg("\nClient Start Success!\nConnecting To Server......", LogLevel.Info);
}
catch (Exception e) {
PETool.LogMsg(e.Message, LogLevel.Error);
}
}
void ServerConnectCB(IAsyncResult ar)
{
try {
skt.EndConnect(ar);
session = new T();
session.StartRcvData(skt, null);
}
catch (Exception e) {
PETool.LogMsg(e.Message, LogLevel.Error);
}
}
/// <summary>
/// Launch Server
/// </summary>
public void StartAsServer(string ip, int port)
{
try {
skt.Bind(new IPEndPoint(IPAddress.Parse(ip), port));
skt.Listen(backlog);
skt.BeginAccept(new AsyncCallback(ClientConnectCB), skt);
PETool.LogMsg("\nServer Start Success!\nWaiting for Connecting......", LogLevel.Info);
}
catch (Exception e) {
PETool.LogMsg(e.Message, LogLevel.Error);
}
}
void ClientConnectCB(IAsyncResult ar)
{
try {
Socket clientSkt = skt.EndAccept(ar);
T session = new T();
session.StartRcvData(clientSkt);
sessionLst.Add(session);
}
catch (Exception e) {
PETool.LogMsg(e.Message, LogLevel.Error);
}
skt.BeginAccept(new AsyncCallback(ClientConnectCB), skt);
}
private void SendCB(IAsyncResult ar)
{
NetworkStream ns = (NetworkStream)ar.AsyncState;
try {
ns.EndWrite(ar);
ns.Flush();
ns.Close();
}
catch (Exception e) {
PETool.LogMsg("SndMsgError:" + e.Message, LogLevel.Error);
}
}
/// <summary>
/// Launch Client
/// </summary>
public void StartAsClient(string ip, int port)
{
try
{
//与服务器端的BeginAccept对应，连接到服务器的IPEndPoint,并传入自身Socket
skt.BeginConnect(new IPEndPoint(IPAddress.Parse(ip), port), new AsyncCallback(ServerConnectCB), skt);
PETool.LogMsg("\n服务器启动成功了喵~~~\n欢迎连接到时空枢纽喵......", LogLevel.Info);
}
catch (Exception e)
{
PETool.LogMsg(e.Message, LogLevel.Error);
}
}
/// <summary>
/// 客户端连接至服务器成功的回调函数
/// </summary>
/// <param name="ar"></param>
void ServerConnectCB(IAsyncResult ar)
{
try
{
//结束掉连接，连接的信息都存入了返回的IAsyncResult中
skt.EndConnect(ar);
session = new T();
//准备接受数据
session.StartRcvData(skt, null);
}
catch (Exception e)
{
PETool.LogMsg(e.Message, LogLevel.Error);
}
}
/// <summary>
/// 先接收到了数据头后，再调用接受数据身子，获得完整的数据
/// </summary>
/// <param name="ar"></param>
private void RcvBodyData(IAsyncResult ar)
{
try
{
PEPkg pack = (PEPkg)ar.AsyncState;
int len = skt.EndReceive(ar);
if (len > 0)
{
pack.bodyIndex += len;
//同样，如果接收到的数据长度比目标数据长度要短，则继续接受直到数据完整
if (pack.bodyIndex < pack.bodyLen)
{
skt.BeginReceive(pack.bodyBuff,
pack.bodyIndex,
pack.bodyLen - pack.bodyIndex,
SocketFlags.None,
new AsyncCallback(RcvBodyData),
pack);
}
else
{
//反序列化数据
T msg = PETool.DeSerialize <T>(pack.bodyBuff);
OnReciveMsg(msg);
//loop recive，重置pack的设置后，继续开始接受数据，直到关闭连接
pack.ResetData();
skt.BeginReceive(
pack.headBuff,
0,
pack.headLen,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
pack);
}
}
//同样，防止空数据，要关闭连接
else
{
OnDisConnected();
Clear();
}
}
catch (Exception e)
{
PETool.LogMsg("RcvBodyError:" + e.Message, LogLevel.Error);
}
}
private void RcvHeadData(IAsyncResult ar)
{
try {
PEPkg pack = (PEPkg)ar.AsyncState;
//返回的len为该次接受数据的总长度
int len = skt.EndReceive(ar);
if (len > 0)
{
//headIndex此时为数据的包括数据头和数据身体的总长度
pack.headIndex += len;
//如果数据的总长度得到的值要比数据头默认的4个字节要短，则说明该数据连数据头都不完整，继续接受数据直到数据完整
if (pack.headIndex < pack.headLen)
{
skt.BeginReceive(
pack.headBuff,
pack.headIndex,
pack.headLen - pack.headIndex,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
pack);
}
else
{
//初始化数据身体，并且再次开始接受，这次接受的目的是按照数据头指定的长度接受数据身体
pack.InitBodyBuff();
skt.BeginReceive(pack.bodyBuff,
0,
pack.bodyLen,
SocketFlags.None,
new AsyncCallback(RcvBodyData),
pack);
}
}
//当len<=0的情况，即远程主机强制关闭了一个现有的连接，这时候服务器会疯狂接收到空数据，这时候就应该关闭掉这段Socket连接
else
{
//发送关闭连接的信息
OnDisConnected();
//关闭连接
Clear();
}
}
catch (Exception e)
{
PETool.LogMsg("RcvHeadError:" + e.Message, LogLevel.Error);
}
}
private void RcvHeadData(IAsyncResult ar)
{
try {
PEPkg pack = (PEPkg)ar.AsyncState;
if (skt.Available == 0)
{
OnDisConnected();
Clear();
return;
}
int len = skt.EndReceive(ar);
if (len > 0)
{
pack.headIndex += len;
if (pack.headIndex < pack.headLen)
{
skt.BeginReceive(
pack.headBuff,
pack.headIndex,
pack.headLen - pack.headIndex,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
pack);
}
else
{
pack.InitBodyBuff();
skt.BeginReceive(pack.bodyBuff,
0,
pack.bodyLen,
SocketFlags.None,
new AsyncCallback(RcvBodyData),
pack);
}
}
else
{
OnDisConnected();
Clear();
}
}
catch (Exception e) {
PETool.LogMsg("RcvHeadError:" + e.Message, LogLevel.Error);
}
}
/// <summary>
/// Launch Server,根据传入的ip和port（端口号）来开启服务
/// </summary>
public void StartAsServer(string ip, int port)
{
//使用try catch语句捕捉异常防止服务器出错宕机
try
{
//绑定服务器Socket的IpEndPoint(ip,port)，使服务器在该ip和port上建立通信，客户端连接这个ipEndPort就可以与服务端通信
skt.Bind(new IPEndPoint(IPAddress.Parse(ip), port));
//设定服务器端最大的连接队列数（这个数值的意义尚未弄明白）
skt.Listen(backlog);
//开始等待客户端的连接，如果连接成功，则调用回调函数，并且将服务器Socket作为参数传递进去
skt.BeginAccept(new AsyncCallback(ClientConnectCB), skt);
PETool.LogMsg("\nServer Start Success!\nWaiting for Connecting......", LogLevel.Info);
}
catch (Exception e)
{
PETool.LogMsg(e.Message, LogLevel.Error);
}
}
public void StartRcvData(Socket skt)
{
try {
this.skt = skt;
OnConnected();
PEPkg pack = new PEPkg();
skt.BeginReceive(
pack.headBuff,
0,
pack.headLen,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
pack);
}
catch (Exception e) {
PETool.LogMsg("StartRcvData:" + e.Message, LogLevel.Error);
}
}
private void RcvBodyData(IAsyncResult ar)
{
try {
PEPkg pack = (PEPkg)ar.AsyncState;
int len = skt.EndReceive(ar);
if (len > 0)
{
pack.bodyIndex += len;
if (pack.bodyIndex < pack.bodyLen)
{
skt.BeginReceive(pack.bodyBuff,
pack.bodyIndex,
pack.bodyLen - pack.bodyIndex,
SocketFlags.None,
new AsyncCallback(RcvBodyData),
pack);
}
else
{
T msg = PETool.DeSerialize <T>(pack.bodyBuff);
OnReciveMsg(msg);
//loop recive
pack.ResetData();
skt.BeginReceive(
pack.headBuff,
0,
pack.headLen,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
pack);
}
}
else
{
OnDisConnected();
Clear();
}
}
catch (Exception e) {
PETool.LogMsg("RcvBodyError:" + e.Message, LogLevel.Error);
}
}
/// <summary>
/// Send binary data
/// </summary>
public void SendMsg(byte[] data)
{
NetworkStream ns = null;
try {
ns = new NetworkStream(skt);
if (ns.CanWrite)
{
ns.BeginWrite(
data,
0,
data.Length,
new AsyncCallback(SendCB),
ns);
}
}
catch (Exception e) {
PETool.LogMsg("SndMsgError:" + e.Message, LogLevel.Error);
}
}
public void StartRcvData(Socket skt, Action closeCB)
{
try {
this.skt = skt;
this.closeCB = closeCB;
OnConnected();
PEPkg pack = new PEPkg();
skt.BeginReceive(
pack.headBuff,
0,
pack.headLen,
SocketFlags.None,
RcvHeadData,
pack);
}
catch (Exception e) {
PETool.LogMsg("StartRcvData:" + e.Message, LogLevel.Error);
}
}
/// <summary>
/// 接受数据函数，传入连接Socket和要调用的
/// </summary>
/// <param name="skt"></param>
/// <param name="closeCB"></param>
public void StartRcvData(Socket skt, Action closeCB)
{
try {
this.skt = skt;
this.closeCB = closeCB;
//连接成功时调用（发送一条连接成功的信息）
OnConnected();
PEPkg pack = new PEPkg();
//开始接受数据，这次获取数据只是获取数据头，目的是为了计算出数据头指向的数据的长度
skt.BeginReceive(
pack.headBuff,
0,
pack.headLen,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
//传入的objcet为pack
pack);
}
catch (Exception e) {
PETool.LogMsg("StartRcvData:" + e.Message, LogLevel.Error);
}
}
/// <summary>
/// Send binary data
/// </summary>
public void SendMsg(byte[] data)
{
try {
var ns = new NetworkStream(skt);
if (ns.CanWrite)
{
ns.BeginWrite(
data,
0,
data.Length,
SendCB,
ns);
}
else
{
ns.Close();
PETool.LogMsg("NetworkStreamError: can't write data to network stream", LogLevel.Error);
}
}
catch (Exception e) {
PETool.LogMsg("SndMsgError:" + e.Message, LogLevel.Error);
}
}
/// <summary>
/// Disconnect network
/// </summary>
protected virtual void OnDisConnected()
{
PETool.LogMsg("Session Disconnected.", LogLevel.Info);
}
/// <summary>
/// Receive network message
/// </summary>
protected virtual void OnReciveMsg(T msg)
{
PETool.LogMsg("Receive Network Message.", LogLevel.Info);
}
/// <summary>
/// Connect network
/// </summary>
protected virtual void OnConnected()
{
PETool.LogMsg("New Seesion Connected.", LogLevel.Info);
}