/*
*
* /// <summary>
* /// Send socket 只发送包头
* /// 只有 SendHeader() 会只发送包头
* /// SendBytes() 至少会发一个空包
* /// </summary>
* /// <param name="socket"></param>
* /// <param name="header"></param>
* private static void SendHeader(Socket socket, HB32Header header)
* {
* SendHeader(socket, header, new byte[0]);
* }
*
*
* /// <summary>
* /// Send socket 只发送包头
* /// </summary>
* /// <param name="socket"></param>
* /// <param name="flag"></param>
* /// <param name="i1"></param>
* /// <param name="i2"></param>
* /// <param name="i3"></param>
* public static void SendHeader(Socket socket, SocketPacketFlag flag, int i1 = 0, int i2 = 0, int i3 = 0)
* {
* SendHeader(socket, new HB32Header
* {
* Flag = flag,
* I1 = i1,
* I2 = i2,
* I3 = i3
* });
* }
*/
/// <summary>
/// 发送 Socket 数据包, 过长的 byte流 会被拆成多个包发送
/// 包头的 PacketCount , ByteLength 等参数会视 bytes 长度被修改
/// 拆成多包发送时, 只有第一个包头会带 ProxyHeader 供 SocketProxy 或 SocketServer 解析
/// 后面的包均为 HB32Header + HB32Data
/// </summary>
/// <param name="socket"></param>
/// <param name="header"></param>
/// <param name="bytes"></param>
/// <param name="addition_bytes"></param>
public static void SendBytes(Socket socket, HB32Header header, byte[] bytes, byte[] addition_bytes)
{
header.PacketCount = Math.Max((bytes.Length - 1) / (HB32Encoding.DataSize) + 1, 1);
header.TotalByteLength = bytes.Length;
header.PacketIndex = 0;
for (int offset = 0; offset < bytes.Length || offset == 0; offset += HB32Encoding.DataSize)
{
header.ValidByteLength = Math.Min(bytes.Length - offset, HB32Encoding.DataSize);
byte[] header_bytes;
if (offset == 0)
{
header_bytes = header.GetBytes(addition_bytes);
}
else
{
header_bytes = header.GetBytes();
}
byte[] _toSend = new byte[header_bytes.Length + HB32Encoding.DataSize];
Array.Copy(header_bytes, 0, _toSend, 0, header_bytes.Length);
Array.Copy(bytes, offset, _toSend, header_bytes.Length, header.ValidByteLength);
socket.Send(_toSend);
/// 若当前数据包之后还有数据包, 在等待对方 发送2个byte 后发送
if (offset + HB32Encoding.DataSize < bytes.Length)
{
ReceiveBuffer(socket, new byte[2]);
//ReceiveHeader(socket, out _);
}
header.PacketIndex++;
}
}
private SocketSender ReversedConnectionProxy(ref SocketResponder responder, HB32Header route_header, byte[] route_bytes)
{
ConnectionRoute route = ConnectionRoute.FromBytes(route_bytes);
if (route.NextNode.Address.Equals(this.HostAddress))
{
if (route.IsNextNodeProxy)
{
// todo: 反向代理
}
else
{
}
return(null);
}
else
{
SocketSender sender = ConnectionRelay(responder, route_header, route);
SocketResponder r = sender.ConvertToResponder();
SocketSender s = responder.ConvertToSender(route_header.I1 > 0);
responder = r;
return(s);
}
}
/// <summary>
/// 创建完整代理隧道, 向下级发送建立连接是否成功信号, 返回与上级通信的 SocketSender
/// [上级可能是 Proxy, Server, Reversed Server, Reversed Server's Proxy, etc....]
/// </summary>
/// <param name="responder"></param>
/// <param name="route_bytes"></param>
/// <returns></returns>
private SocketSender ForwardConnectionProxy(SocketResponder responder, HB32Header route_header, byte[] route_bytes)
{
ConnectionRoute route = ConnectionRoute.FromBytes(route_bytes);
if (route.NextNode.Address.Equals(this.HostAddress))
{
/// 为连接到此的反向代理
// todo
// 可以试试 ReadWriteLock
if (ReversedProxyServers.ContainsKey(route.NextNode.Name))
{
ReversedServerInfo server = ReversedProxyServers[route.NextNode.Name];
/// Set EventWaitHandle
/// Wait for new connection built from server
}
else
{
//todo 没有对应挂载的 Server
}
return(null);
}
else
{
return(ConnectionRelay(responder, route_header, route));
}
}
public void ReceiveBytes(out HB32Header header, out byte[] bytes)
{
if (IsWithProxy)
{
client.Send(new byte[2] {
0xA3, (byte)ProxyHeader.ReceiveBytes
});
}
ReceiveBytes(client, out header, out bytes);
}
public void ReceiveBytes(out HB32Header header, out byte[] bytes)
{
if (IsRequireProxyHeader)
{
client.Send(new byte[2] {
0xA3, (byte)ProxyHeader.ReceiveBytes
});
}
/// Receive 的数据仍有一个空的ProxyHeader, 应处理后再接收数据
ReceiveProxyHeader();
SocketIO.ReceiveBytes(client, out header, out bytes);
}
public void ReceiveBytesWithHeaderFlag(SocketPacketFlag flag, out HB32Header header, out byte[] bytes)
{
ReceiveBytes(out header, out bytes);
if (header.Flag != flag)
{
string err_msg = "";
try
{
err_msg = Encoding.UTF8.GetString(bytes);
}
catch (Exception) {; }
throw new ArgumentException(string.Format("[Received not valid header: {0}, required : {1}] -- {2}", header.Flag.ToString(), flag.ToString(), err_msg));
}
}
public void SendBytes(HB32Header header, byte[] bytes)
{
if (IsRequireProxyHeader)
{
SocketIO.SendBytes(client, header, bytes, new byte[2] {
SocketProxy.ProxyHeaderByte, (byte)ProxyHeader.SendBytes
});
}
else
{
SocketIO.SendBytes(client, header, bytes, new byte[2] {
0, 0
});
}
}
private byte[] GetHeaderBytesWithProxy(HB32Header header)
{
if (IsWithProxy)
{
byte[] bytes = new byte[34];
bytes[0] = 0xA3;
bytes[1] = (byte)NextProxyHeader;
Array.Copy(header.GetBytes(), 0, bytes, 2, 32);
return(bytes);
}
else
{
return(header.GetBytes());
}
}
/// <summary>
/// 调用此方法可以在发送包头前添加 addition_bytes (发送代理包头)
/// </summary>
/// <param name="socket"></param>
/// <param name="header"></param>
/// <param name="addition_bytes"></param>
public static void SendHeader(Socket socket, HB32Header header, byte[] addition_bytes)
{
header.PacketCount = 0;
header.TotalByteLength = 0;
header.PacketIndex = 0;
header.ValidByteLength = 0;
byte[] bytes = header.GetBytes(addition_bytes);
socket.Send(bytes);
/*
* if (addition_bytes.Length == 0)
* {
* socket.Send(header.GetBytes());
* }
* else
* {
* socket.Send(BytesConverter.Concatenate(addition_bytes, header.GetBytes()));
* }
*/
}
/// <summary>
/// 接收 Socket 数据包, 在接收不定长byte流时使用, 过长byte流会分开接收并拼接成byte数组
/// 收到的数据只有包头时, 返回空byte数组
/// 只能处理去掉 ProxyHeader 后的字节流, 所以 socket 接收数据应先经过 SocketEndPoint 类处理 ProxyHeader
/// </summary>
/// <param name="socket"></param>
/// <param name="header"></param>
/// <param name="bytes"></param>
public static void ReceiveBytes(Socket socket, out HB32Header header, out byte[] bytes)
{
/// 通过包头判断byte流长度, 确定byte数组大小 包数量 等基本信息
ReceiveHeader(socket, out header);
/// 此时 socket 只接收了HB32Header包头长度的字节
/// 对于 SendHeader() 只发送包头的数据
/// 函数会直接返回空byte数组
bytes = new byte[header.TotalByteLength];
int offset = 0; // bytes 数组写入起点偏移量
for (int i = 0; i < header.PacketCount; ++i)
{
if (i == header.PacketCount - 1)
{
/// 读取缓冲区中有效数据
if (header.ValidByteLength > 0)
{
ReceiveBuffer(socket, bytes, header.ValidByteLength, offset);
}
/// 读取缓冲区中剩余的无效数据
ReceiveBuffer(socket, new byte[HB32Encoding.DataSize - header.ValidByteLength]);
}
else
{
/// 读取缓冲区数据
ReceiveBuffer(socket, bytes, header.ValidByteLength, offset);
offset += header.ValidByteLength;
// /// 发送 StreamRequset header
// SendHeader(socket, new HB32Header { Flag = SocketPacketFlag.StreamRequest }, new byte[2]);
/// 发送 2 个byte, 获取下一个数据包
socket.Send(new byte[2]);
/// 读取下一个包头
ReceiveHeader(socket, out header);
}
}
}
public static byte[] GetBytes(HB32Header header)
{
return(header.GetBytes());
}
/*
* /// <summary>
* /// 发送 Socket 数据包, 过长的 byte流 会被拆成多个包发送
* /// 包头的 PacketCount , ByteLength 等参数会视 bytes 长度被修改
* /// </summary>
* /// <param name="socket"></param>
* /// <param name="header"></param>
* /// <param name="bytes"></param>
* public static void SendBytes(Socket socket, HB32Header header, byte[] bytes)
* {
* SendBytes(socket, header, bytes, new byte[0]);
* }
*
*
*
* /// <summary>
* /// 发送 Socket 数据包, 字符串以 UTF-8 编码后发送
* /// </summary>
* /// <param name="socket"></param>
* /// <param name="header"></param>
* /// <param name="str"></param>
* public static void SendBytes(Socket socket, HB32Header header, string str)
* {
* SendBytes(socket, header, Encoding.UTF8.GetBytes(str));
* }
*
*
*
* /// <summary>
* /// 发送 Socket 数据包
* /// </summary>
* /// <param name="socket"></param>
* /// <param name="flag"></param>
* /// <param name="bytes"></param>
* /// <param name="i1"></param>
* /// <param name="i2"></param>
* /// <param name="i3"></param>
* public static void SendBytes(Socket socket, SocketPacketFlag flag, byte[] bytes, int i1 = 0, int i2 = 0, int i3 = 0)
* {
* SendBytes(socket, new HB32Header
* {
* Flag = flag,
* I1 = i1,
* I2 = i2,
* I3 = i3
* }, bytes);
* }
*
* /// <summary>
* /// 发送 Socket 数据包, 字符串以 UTF-8 编码后发送
* /// </summary>
* /// <param name="socket"></param>
* /// <param name="flag"></param>
* /// <param name="str"></param>
* /// <param name="i1"></param>
* /// <param name="i2"></param>
* /// <param name="i3"></param>
* public static void SendBytes(Socket socket, SocketPacketFlag flag, string str, int i1 = 0, int i2 = 0, int i3 = 0)
* {
* SendBytes(socket, flag, Encoding.UTF8.GetBytes(str), i1, i2, i3);
* }
*/
/// <summary>
/// Receive socket 只接收包头, 但不可以处理 ProxyHeader (处理 ProxyHeader 方法应位于 SocketEndPoint 类中)
/// 此方法只能用于对于字节流的Header部份截取处理
/// 若要完整接收只含 Header 的字节流, 应使用 ReceiveBytes() 方法
/// </summary>
/// <param name="socket"></param>
/// <param name="header"></param>
public static void ReceiveHeader(Socket socket, out HB32Header header)
{
byte[] bytes_header = new byte[HB32Encoding.HeaderSize];
ReceiveBuffer(socket, bytes_header);
header = HB32Header.ReadFromBytes(bytes_header);
}
/// <summary>
/// 尽量不要用, 可以用 ReceiveBytes() 代替
/// Receive Socket 数据包, 在确定接收数据包只有一个时使用, 输出 包头 和 byte数组格式内容
/// 擅用后果自负
/// </summary>
/// <param name="socket"></param>
/// <param name="header">输出包头</param>
/// <param name="bytes_data"></param>
public static void ReceivePacket(Socket socket, out HB32Header header, out byte[] bytes_data)
{
ReceiveHeader(socket, out header);
bytes_data = new byte[HB32Encoding.DataSize];
ReceiveBuffer(socket, bytes_data);
}
/// <summary>
/// 当上一级代理不是挂载在当前代理上的节点上时, 利用此方法完成同方向代理的中继, 并返回上级代理结果
/// </summary>
/// <param name="responder"></param>
/// <param name="route"></param>
/// <returns></returns>
private SocketSender ConnectionRelay(SocketResponder responder, HB32Header header, ConnectionRoute route)
{
if (route.IsNextNodeProxy)
{
/// 继续正向代理
SocketSender sender = new SocketSender(true);
string err_msg = "";
try
{
sender.ConnectWithTimeout(route.NextNode.Address, Config.BuildConnectionTimeout);
sender.SetTimeout(Config.SocketSendTimeout, Config.SocketReceiveTimeout);
}
catch (Exception ex)
{
/// 当前代理建立连接失败
err_msg = ex.Message;
}
if (string.IsNullOrEmpty(err_msg))
{
HB32Header next_header = header.Copy();
next_header.I1++;
sender.SendBytes(next_header, route.GetBytes(node_start_index: 1));
sender.ReceiveBytes(out HB32Header respond_header, out byte[] respond_bytes);
if ((respond_header.Flag | SocketPacketFlag.ExceptionFlag) == 0)
{
responder.SendHeader(respond_header);
}
else
{
/// 上级或更上级代理建立连接失败, header 中包含抛出异常的代理位置
responder.SendBytes(respond_header, respond_bytes);
}
}
else
{
HB32Header err_header = header.Copy();
err_header.Flag = (SocketPacketFlag)(((int)err_header.Flag & 0xFFFF00) | 0x90);
responder.SendBytes(err_header, err_msg);
}
return(sender);
}
else
{
/// 直连 server
SocketSender sender = new SocketSender(false);
string err_msg = "";
try
{
sender.ConnectWithTimeout(route.ServerAddress.Address, Config.BuildConnectionTimeout);
sender.SetTimeout(Config.SocketSendTimeout, Config.SocketReceiveTimeout);
}
catch (Exception ex)
{
err_msg = ex.Message;
}
/// response
if (string.IsNullOrEmpty(err_msg))
{
HB32Header resp_header = header.Copy();
resp_header.Flag = (SocketPacketFlag)(((int)resp_header.Flag & 0xFFFF00) | 0x10);
responder.SendHeader(resp_header);
}
else
{
HB32Header err_header = header.Copy();
err_header.Flag = (SocketPacketFlag)(((int)err_header.Flag & 0xFFFF00) | 0x90);
responder.SendBytes(err_header, err_msg);
}
return(sender);
}
}
public void SendBytes(HB32Header header, byte[] bytes)
{
this.NextProxyHeader = ProxyHeader.SendBytes;
SendBytes(client, header, bytes);
}
private void LongConnectionRespond(SocketResponder responder, HB32Header route_header, byte[] route_bytes)
{
/// LongConnection 中继, 或 将Reversed Server 挂载在此
}
public void ReceiveBytesWithHeaderFlag(SocketPacketFlag flag, out HB32Header header)
{
ReceiveBytesWithHeaderFlag(flag, out header, out _);
}
public void SendHeader(HB32Header header)
{
this.NextProxyHeader = ProxyHeader.SendHeader;
SendHeader(client, header);
}
/// <summary>
/// 在 SocketProxy 中调用, 对于socket 在 ReceiveProxyHeader 后调用
/// </summary>
/// <param name="header"></param>
/// <param name="bytes"></param>
public void ReceiveBytesWithoutProxyHeader(out HB32Header header, out byte[] bytes)
{
SocketIO.ReceiveBytes(client, out header, out bytes);
}
public void SendBytes(HB32Header header, string str)
{
SendBytes(header, Encoding.UTF8.GetBytes(str));
}