这是在学《Windows网络编程（第二版）》第六章时制作的一个例子由于书中没有给出简洁的例子，本人在学这里时就费了很多时间。现在把完成的代码贴出来，供大家参考。下面包括了主程序部分，工作线程在（2）中贴出，由于代码太长。本程序在VS2003编译器编译运行。在6.0下可能需要稍加修改。
#include <iostream>#include <winsock2.h>#include <ws2tcpip.h>#include <mswsock.h> //微软扩展的类库
using namespace std;#define SEND 0#define RECV 1#define ACCEPT 2
#define DATA_LENGTH 1000//单句柄数据定义typedef struct _PER_HANDLE_DATA{ SOCKET socket; //相关的套接字 SOCKADDR_STORAGE clientAddr; //客户端的地址}PER_HANDLE_DATA,*LPPER_HANDLE_DATA;
//但IO操作数据typedef struct{ OVERLAPPED overlapped; WSABUF buffer; //一个数据缓冲区,用于WSASend/WSARecv中的第二个参数 char dataBuffer[DATA_LENGTH]; //实际的数据缓冲区 int dataLength; //实际的数据缓冲区长度 int operatorType; //操作类型,可以为SEND/RECV两种 SOCKET client; //分别表示发送的字节数和接收的字节数}PER_IO_DATA,*LPPER_IO_DATA;
void main(){ HANDLE CompletionPort; WSADATA data; SYSTEM_INFO info; SOCKADDR_IN addr; SOCKET Listen;
unsigned int i; WSAStartup(MAKEWORD(2,2),&data);
//创建一个IO完成端口 CompletionPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE,NULL,0,0); //确定处理器的数量 GetSystemInfo(&info); //创建线城 for(i=0;i<info.dwNumberOfProcessors * 2;i++) { //根据处理器的数量创建相应多的处理线程 HANDLE thread = CreateThread(NULL,0,ServerThread,CompletionPort,0,NULL); CloseHandle(thread); } //创建一个监听套接字(进行重叠操作) Listen = WSASocket(AF_INET,SOCK_STREAM,0,NULL,0,WSA_FLAG_OVERLAPPED); //将监听套接字与完成端口绑定 LPPER_HANDLE_DATA perDandleData; perDandleData = (LPPER_HANDLE_DATA)GlobalAlloc(GPTR,sizeof(PER_HANDLE_DATA)); perDandleData->socket = Listen; CreateIoCompletionPort((HANDLE)Listen,CompletionPort,(ULONG_PTR)perDandleData,0);
addr.sin_family = AF_INET; addr.sin_addr.s_addr = htonl(INADDR_ANY); addr.sin_port = htons(5500);
bind(Listen,(PSOCKADDR)&addr,sizeof(addr)); listen(Listen,5);
LPFN_ACCEPTEX lpfnAcceptEx = NULL; //AcceptEx函数指针 //Accept function GUID GUID guidAcceptEx = WSAID_ACCEPTEX; //get acceptex function pointer DWORD dwBytes = 0; if(WSAIoctl(Listen,SIO_GET_EXTENSION_FUNCTION_POINTER, &guidAcceptEx,sizeof(guidAcceptEx),&lpfnAcceptEx,sizeof(lpfnAcceptEx), &dwBytes,NULL,NULL)==0) cout<<"WSAIoctl success..."<<endl; else{ cout<<"WSAIoctl failed..."<<endl; switch(WSAGetLastError()) { case WSAENETDOWN: cout<<""<<endl; break; case WSAEFAULT: cout<<"WSAEFAULT"<<endl; break; case WSAEINVAL: cout<<"WSAEINVAL"<<endl; break; case WSAEINPROGRESS: cout<<"WSAEINPROGRESS"<<endl; break; case WSAENOTSOCK: cout<<"WSAENOTSOCK"<<endl; break; case WSAEOPNOTSUPP: cout<<"WSAEOPNOTSUPP"<<endl; break; case WSA_IO_PENDING: cout<<"WSA_IO_PENDING"<<endl; break; case WSAEWOULDBLOCK: cout<<"WSAEWOULDBLOCK"<<endl; break; case WSAENOPROTOOPT: cout<<"WSAENOPROTOOPT"<<endl; break; } return; }
//while(true) //{ //准备调用 AcceptEx 函数，该函数使用重叠结构并于完成端口连接 LPPER_IO_DATA perIoData = (LPPER_IO_DATA)GlobalAlloc(GPTR,sizeof(PER_IO_DATA)); memset(&(perIoData->overlapped),0,sizeof(OVERLAPPED)); perIoData->operatorType = ACCEPT; //在使用AcceptEx前需要事先重建一个套接字用于其第二个参数。这样目的是节省时间 //通常可以创建一个套接字库 perIoData->client = WSASocket(AF_INET,SOCK_STREAM,IPPROTO_TCP,0,0,WSA_FLAG_OVERLAPPED);
perIoData->dataLength = DATA_LENGTH; DWORD flags = 0; //调用AcceptEx函数，地址长度需要在原有的上面加上16个字节 //注意这里使用了重叠模型，该函数的完成将在与完成端口关联的工作线程中处理 cout<<"Process AcceptEx function wait for client connect..."<<endl; int rc = lpfnAcceptEx(Listen,perIoData->client,perIoData->dataBuffer, perIoData->dataLength-((sizeof(SOCKADDR_IN)+16)*2), sizeof(SOCKADDR_IN)+16,sizeof(SOCKADDR_IN)+16,&dwBytes, &(perIoData->overlapped)); if(rc == FALSE) { if(WSAGetLastError()!=ERROR_IO_PENDING) cout<<"lpfnAcceptEx failed.."<<endl; }
cin>>i; closesocket(Listen); WSACleanup();}
DWORD WINAPI ServerThread(LPVOID lpParam){ HANDLE CompletionPort = (HANDLE)lpParam; DWORD bytes; LPPER_HANDLE_DATA perHandleData = NULL; //单句柄数据 LPPER_IO_DATA perIoData; //单IO数据 DWORD Flags; int ret; DWORD RecvBytes; //进入循环的等待重叠操作的完成 while(true) { bytes = -1; ret=GetQueuedCompletionStatus( CompletionPort, //原先的完成端口句柄 &bytes, //重叠操作完成的字节数 (LPDWORD)&perHandleData, //原先和完成端口句柄关联起来的单句柄数据 (LPOVERLAPPED*)&perIoData, //用于接收已完成的IO操作的重叠结构 INFINITE); //在完成端口上等待的时间 INFINITE 为无限等待 //先检查在套接字上是否发生错误 //当发生错误时关闭套接字同时释放掉所有的内存. int i = 0; if(bytes == 0 && (perIoData->operatorType == RECV || perIoData->operatorType == SEND)) { closesocket(perHandleData->socket); GlobalFree(perHandleData); GlobalFree(perIoData); cout<<"closesocket and globalfree perhandledata periodata!"<<endl; continue; } //这是AcceptEx函数处理完成，在下面处理 if(perIoData->operatorType == ACCEPT) //处理连接操作 { //使用GetAcceptExSockaddrs函数 获得具体的各个地址参数. if(setsockopt( perIoData->client, SOL_SOCKET, SO_UPDATE_ACCEPT_CONTEXT, ( char* )&(perHandleData->socket ), sizeof( perHandleData->socket ) )==SOCKET_ERROR) cout<<"setsockopt..."<<endl;
perHandleData->socket = perIoData->client;
//memcpy(&(perHandleData->clientAddr),raddr,sizeof(raddr)); //将新的客户套接字与完成端口连接 CreateIoCompletionPort((HANDLE)perHandleData->socket, CompletionPort,(ULONG_PTR)perHandleData,0);
memset(&(perIoData->overlapped),0,sizeof(OVERLAPPED)); perIoData->operatorType = RECV; //将状态设置成接收 //设置WSABUF结构 perIoData->buffer.buf = perIoData->dataBuffer; perIoData->buffer.len = perIoData->dataLength = DATA_LENGTH;
cout<<"wait for data arrive(Accept)..."<<endl; Flags = 0; if(WSARecv(perHandleData->socket,&(perIoData->buffer),1, &RecvBytes,&Flags,&(perIoData->overlapped),NULL)==SOCKET_ERROR) if(WSAGetLastError()==WSA_IO_PENDING) cout<<"WSARecv Pending..."<<endl; continue; } if(perIoData->operatorType == RECV) cout<<perIoData->buffer.buf<<endl; //将接收到的数据显示出来 Flags = 0; perIoData->operatorType = RECV; //设置成接受数据类型
ZeroMemory(&(perIoData->overlapped),sizeof(OVERLAPPED)); //重新投递一个新的接收请求 cout<<" wait for data arrive..."<<endl; WSARecv(perHandleData->socket,&(perIoData->buffer),1, &RecvBytes,&Flags,&(perIoData->overlapped),NULL); }
return 0;}
本文来自博客，转载请标明出处：http://blog.csdn.net/kener_linfeng/archive/2009/05/03/4145471.aspx
