TCP Socket编程(非阻塞模式)(C++)
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代码来源:《Windows网络编程》(罗莉琴,詹祖桥 主编)(如造成任何不便,请联系我删除)
服务器:
[cpp] view plain copy
- // TcpServer.cpp : 定义控制台应用程序的入口点。
- //
- #include "stdafx.h"
- #include <winsock2.h>
- #include <iostream>
- #pragma comment(lib,"ws2_32.lib")
- #define BUF_SIZE 64
- int _tmain(int argc, _TCHAR* argv[])
- {
- WSADATA wsd;
- SOCKET sServer;
- SOCKET sClient;
- int retVal;
- char buf[BUF_SIZE];
- //初始化Socket
- if (WSAStartup(MAKEWORD(2, 2), &wsd) != 0)
- {
- printf("WSAStartup failed!\n");
- return -1;
- }
- //创建用于监听的Socket
- sServer = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
- if (INVALID_SOCKET == sServer)
- {
- printf("socket failed!\n");
- WSACleanup();
- return -1;
- }
- //设置Socket为非阻塞模式
- int iMode = 1;
- retVal = ioctlsocket(sServer,FIONBIO,(u_long FAR*)&iMode);
- if (retVal == SOCKET_ERROR)
- {
- printf("ioctlsocket failed!\n");
- WSACleanup();
- return -1;
- }
- //设置服务器Socket地址
- sockaddr_in addrServ;
- addrServ.sin_family = AF_INET;
- addrServ.sin_port = htons(9990);
- addrServ.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
- //绑定Socket Server到本地地址
- retVal = bind(sServer,(const struct sockaddr*)&addrServ,sizeof(sockaddr_in));
- if (retVal == SOCKET_ERROR)
- {
- printf("bind failed!\n");
- closesocket(sServer);
- WSACleanup();
- return -1;
- }
- //监听
- retVal = listen(sServer,1);
- if (retVal == SOCKET_ERROR)
- {
- printf("listen failed!\n");
- closesocket(sServer);
- WSACleanup();
- return -1;
- }
- //接受客户请求
- printf("TCP Server start...\n");
- sockaddr_in addrClient;
- int addrClientlen = sizeof(addrClient);
- //循环等待
- while (true)
- {
- sClient = accept(sServer,(sockaddr FAR*)&addrClient,&addrClientlen);
- if (INVALID_SOCKET == sClient)
- {
- int err = WSAGetLastError();
- if (err == WSAEWOULDBLOCK)
- {
- Sleep(100);
- continue;
- }
- else
- {
- printf("accept failed!\n");
- closesocket(sServer);
- WSACleanup();
- return -1;
- }
- }
- break;
- }
- //循环接受客户端的数据,直到客户端发送quit命令后退出
- while (true)
- {
- ZeroMemory(buf,BUF_SIZE);
- retVal = recv(sClient,buf,BUFSIZ,0);
- if (SOCKET_ERROR == retVal)
- {
- int err = WSAGetLastError();
- if (err == WSAEWOULDBLOCK)
- {
- Sleep(100);
- continue;
- }
- else if (err == WSAETIMEDOUT || err == WSAENETDOWN)
- {
- printf("recv failed!\n");
- closesocket(sServer);
- closesocket(sClient);
- WSACleanup();
- return -1;
- }
- }
- //获取系统时间
- SYSTEMTIME st;
- GetLocalTime(&st);
- char sDateTime[30];
- sprintf_s(sDateTime, "%4d-%2d-%2d %2d:%2d:%2d", st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond);
- //打印输出信息
- printf("%s,Recv From Client [%s:%d]:%s\n",sDateTime,inet_ntoa(addrClient.sin_addr),addrClient.sin_port,buf);
- //如果客户端发送“quit”字符串,则服务器退出
- if (strcmp(buf, "quit") == 0)
- {
- retVal = send(sClient,"quit",strlen("quit"),0);
- break;
- }
- else
- {
- char msg[BUF_SIZE];
- sprintf_s(msg,"Message received - %s",buf);
- while (true)
- {
- retVal = send(sClient,msg,strlen(msg),0);
- if (SOCKET_ERROR == retVal)
- {
- int err = WSAGetLastError();
- if (err == WSAEWOULDBLOCK)
- {
- Sleep(100);
- continue;
- }
- else
- {
- printf("send failed!\n");
- closesocket(sServer);
- closesocket(sClient);
- WSACleanup();
- return -1;
- }
- }
- break;
- }
- }
- }
- //释放Socket
- closesocket(sServer);
- closesocket(sClient);
- WSACleanup();
- system("pause");
- return 0;
- }
客户端:
[cpp] view plain copy
- // TcpClient.cpp : 定义控制台应用程序的入口点。
- //
- #include "stdafx.h"
- #include <winsock2.h>
- #include <string>
- #include <iostream>
- #pragma comment(lib,"ws2_32.lib")
- #define BUF_SIZE 64
- int _tmain(int argc, _TCHAR* argv[])
- {
- WSADATA wsd;
- SOCKET sHost;
- SOCKADDR_IN servAddr;
- char buf[BUF_SIZE];
- int retVal;
- //初始化Socket
- if (WSAStartup(MAKEWORD(2, 2), &wsd) != 0)
- {
- printf("WSAStartup failed!\n");
- return -1;
- }
- //创建Socket
- sHost = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
- if (INVALID_SOCKET == sHost)
- {
- printf("socket failed!\n");
- WSACleanup();
- return -1;
- }
- //设置Socket为非阻塞模式
- int iMode = 1;
- retVal = ioctlsocket(sHost, FIONBIO, (u_long FAR*)&iMode);
- if (retVal == SOCKET_ERROR)
- {
- printf("ioctlsocket failed!\n");
- WSACleanup();
- return -1;
- }
- //设置服务器Socket地址
- servAddr.sin_family = AF_INET;
- servAddr.sin_port = htons(9990);
- servAddr.sin_addr.S_un.S_addr = inet_addr("ip地址");//htonl(INADDR_ANY);
- int sServerAddlen = sizeof(servAddr);
- //连接到服务器
- while (true)
- {
- retVal = connect(sHost,(LPSOCKADDR)&servAddr,sizeof(servAddr));
- if (SOCKET_ERROR == retVal)
- {
- int err = WSAGetLastError();
- if (err == WSAEWOULDBLOCK || err == WSAEINVAL)
- {
- Sleep(500);
- continue;
- }
- else if (err == WSAEISCONN)
- {
- break;
- }
- else
- {
- printf("connection failed!\n");
- closesocket(sHost);
- WSACleanup();
- return -1;
- }
- }
- }
- //收发数据
- while (true)
- {
- printf("Please input a string to send:");
- std::string str;
- std::getline(std::cin,str);
- ZeroMemory(buf,BUF_SIZE);
- strcpy_s(buf,str.c_str());
- while (true)
- {
- retVal = send(sHost,buf,strlen(buf),0);
- if (SOCKET_ERROR == retVal)
- {
- int err = WSAGetLastError();
- if (err == WSAEWOULDBLOCK)
- {
- Sleep(500);
- continue;
- }
- else
- {
- printf("send failed!\n");
- closesocket(sHost);
- WSACleanup();
- return -1;
- }
- }
- break;
- }
- while (true)
- {
- ZeroMemory(buf,BUF_SIZE);
- retVal = recv(sHost,buf,sizeof(buf)+1,0);
- if (SOCKET_ERROR == retVal)
- {
- int err = WSAGetLastError();
- if (err == WSAEWOULDBLOCK)
- {
- Sleep(100);
- printf("waiting back msg!\n");
- continue;
- }
- else if (err == WSAETIMEDOUT || err == WSAENETDOWN)
- {
- printf("recv failed!\n");
- closesocket(sHost);
- WSACleanup();
- return -1;
- }
- break;
- }
- break;
- }
- printf("Recv From Server:%s\n",buf);
- if (strcmp(buf, "quit") == 0)
- {
- printf("quit!\n");
- break;
- }
- }
- closesocket(sHost);
- WSACleanup();
- system("pause");
- return 0;
- }
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