我学会了如何使用Windows Message Proc创建套接字并打开FD_CONNECT,FD_ACCEPT,FD_CLOSE等。我使用了:WSAAsyncSelect(socket, WindowHandle, WM_SOCKET, FD_READ | FD_WRITE | FD_CONNECT | FD_CLOSE | FD_ACCEPT)
。
这让我知道套接字:接受,关闭,接收数据,而无需轮询。
现在我正在尝试学习为控制台应用程序做同样的操作,但使用IOCP。
我写了以下内容:
#include <Winsock2.h>
#include <Ws2tcpip.h>
#include <Windows.h>
#include <iostream>
#include <thread>
#include <stdexcept>
#include <cstring>
class Socket
{
private:
typedef struct
{
OVERLAPPED Overlapped;
WSABUF DataBuf;
char Buffer[1024];
unsigned int BytesSent;
unsigned int BytesReceived;
} PER_IO_OPERATION_DATA;
typedef struct
{
SOCKET Sock;
} PER_HANDLE_DATA;
protected:
void Close();
std::function<void(HANDLE)> Worker;
public:
Socket();
bool Start(std::string Address, unsigned int Port, bool Listen);
void Read(char* Buffer, int bufflen); //reads from a socket.
void Write(char* Buffer, int bufflen); //writes to a socket.
bool Accept(); //accepts a socket.
virtual void OnRead(); //Called when Reading.
virtual void OnWrite(); //Called when Writing.
virtual void OnAccept(); //Called when a socket has been accepted.
virtual void OnConnect(); //Called when connected.
virtual void OnDisconnect(); //Called when disconnected.
};
bool Socket::Start(std::string Address, unsigned int Port, bool Listen)
{
WSADATA wsaData;
SOCKET sock = 0;
struct sockaddr_in* sockaddr_ipv4;
//WSA Startup and getaddrinfo, etc.. here..
//Create IOCP Handle and worker threads.
HANDLE IOCPPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE, nullptr, 0, 0);
if (!IOCPPort)
{
this->Close();
throw std::runtime_error("Error: Creating IOCP Failed With Error: " + std::to_string(GetLastError()));
}
SYSTEM_INFO SystemInfo = {0};
GetSystemInfo(&SystemInfo);
for (std::size_t I = 0; I < SystemInfo.dwNumberOfProcessors * 2; ++I)
{
std::thread(this->Worker, IOCPPort).detach();
}
//Set the socket to overlapped.
if ((sock = WSASocket(AF_INET, SOCK_STREAM, IPPROTO_TCP, nullptr, 0, WSA_FLAG_OVERLAPPED)) == INVALID_SOCKET)
{
this->Close();
throw std::runtime_error("Error: ");
}
struct sockaddr_in SockAddr;
std::memset(&SockAddr, 0, sizeof(SockAddr));
SockAddr.sin_port = htons(Port);
SockAddr.sin_family = AF_INET;
SockAddr.sin_addr.s_addr = (Address == "INADDR_ANY" ? htonl(INADDR_ANY) : inet_addr(Address.c_str()));
//If it is a server socket being created, bind it.
if (Listen && (bind(sock, reinterpret_cast<SOCKADDR*>(&SockAddr), sizeof(SockAddr)) == SOCKET_ERROR))
{
this->Close();
throw std::runtime_error("Error: ");
}
//If it is a server socket, start listenening.
if (Listen && (listen(sock, SOMAXCONN) == SOCKET_ERROR))
{
this->Close();
throw std::runtime_error("Error: ");
}
//Otherwise it is a client socket so just connected..
//if(!Listen && (connect(this->socket, reinterpret_cast<SOCKADDR*>(&SockAddr), sizeof(SockAddr)) == SOCKET_ERROR))
//Associate this socket with a completion port.
if (CreateIoCompletionPort(reinterpret_cast<HANDLE>(sock), IOCPPort, 0, 0) != IOCPPort)
{
this->Close();
throw std::runtime_error("Error: ");
}
//setsockopt(sock, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT, (char *)sdListen, sizeof(sdListen));
}
然而,现在我被卡住了。我不确定在创建IoCompletionPort后我需要做什么。我如何知道套接字何时被接受,以便我可以调用OnAccept,或者如何判断何时有数据需要读取,以便我可以调用OnRead?我浏览了谷歌上的所有页面,但找不到与OnRead,OnAccept或OnWrite类似的任何内容。
我只是想让它可扩展,并且在没有使用事件或消息循环的情况下进行回调。我在google上看到的唯一让我感兴趣的是IOCP,但我完全迷失了。我还需要做什么?
答案 0 :(得分:0)
很久以前我写了一些关于IOCP服务器设计的文章,我也有一些你可以下载的代码,为你做基础知识。
您可以获取代码并找到here中文章的链接。它们可以帮助您了解接下来会发生什么以及如何构建IOCP客户端或服务器。