C/C++ winsock实现不同设备实时通讯的示例代码
作者:qcqzz233
这篇文章主要为大家详细介绍了C/C++如何利用winsock连接实现不同设备实时通讯,文中的示例代码讲解详细,感兴趣的小伙伴可以跟随小编一起学习一下
话不多说,我们先来了解一下套接字连接的原理吧:
第一步,客户端和服务端异步启动;
第二步,两端分别创建套接字,填充信息并绑定;
第三步,将服务端设为监听状态,等待连接;
客户端发起连接请求,建立连接。
最后,双端进行数据交流,关闭服务器。
具体看代码:
服务端:
#include <stdio.h> #include <winsock2.h> #pragma comment(lib, "ws2_32.lib") int main() { WSADATA wsaData; SOCKET serverSocket, clientSocket; struct sockaddr_in serverAddr, clientAddr; int clientAddrLen = sizeof(clientAddr); char recvBuf[1024]; char sendBuf[1024]; // 初始化WSA if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) { printf("WSAStartup failed!\n"); return 1; } // 创建Socket serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (serverSocket == INVALID_SOCKET) { printf("create socket failed!\n"); return 1; } // 绑定地址 memset(&serverAddr, 0, sizeof(serverAddr)); serverAddr.sin_family = AF_INET; serverAddr.sin_addr.s_addr = htonl(INADDR_ANY); serverAddr.sin_port = htons(12345); // 可以修改为其他端口号 if (bind(serverSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) { printf("bind failed!\n"); closesocket(serverSocket); return 1; } // 监听Socket if (listen(serverSocket, SOMAXCONN) == SOCKET_ERROR) { printf("listen failed!\n"); closesocket(serverSocket); return 1; } printf("server is running...\n"); // 等待客户端连接 clientSocket = accept(serverSocket, (struct sockaddr*)&clientAddr, &clientAddrLen); if (clientSocket == INVALID_SOCKET) { printf("accept failed!\n"); closesocket(serverSocket); return 1; } // 接收消息 memset(recvBuf, 0, sizeof(recvBuf)); recv(clientSocket, recvBuf, sizeof(recvBuf), 0); printf("receive message: %s\n", recvBuf); // 发送消息 strcpy(sendBuf, "Hello, Client!"); send(clientSocket, sendBuf, strlen(sendBuf), 0); printf("send message: %s\n", sendBuf); // 关闭Socket closesocket(clientSocket); closesocket(serverSocket); // 清理WSA WSACleanup(); return 0; }
客户端:
#include <stdio.h> #include <winsock2.h> #pragma comment(lib, "ws2_32.lib") int main() { WSADATA wsaData; SOCKET clientSocket; struct sockaddr_in serverAddr; char sendBuf[1024]; //发送信息存储地址 char recvBuf[1024]; //接收信息存储地址 // 初始化WSA if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) { //错误处理 printf("WSAStartup failed!\n"); return 1; } // 创建Socket clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); //tcp协议,采用阻塞传输 if (clientSocket == INVALID_SOCKET) { printf("create socket failed!\n"); return 1; } // 配置Server地址 memset(&serverAddr, 0, sizeof(serverAddr)); serverAddr.sin_family = AF_INET; serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1"); // 修改为实际的服务端IP(可以查询本机ip) serverAddr.sin_port = htons(12345); // 修改为实际的服务端端口 // 连接服务器 if (connect(clientSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) { printf("connect server failed!\n"); closesocket(clientSocket); return 1; } // 发送消息 strcpy(sendBuf, "Hello, Server!"); send(clientSocket, sendBuf, strlen(sendBuf), 0); printf("send message: %s\n", sendBuf); // 接收消息 memset(recvBuf, 0, sizeof(recvBuf)); recv(clientSocket, recvBuf, sizeof(recvBuf), 0); printf("receive message: %s\n", recvBuf); // 关闭Socket closesocket(clientSocket); // 清理WSA WSACleanup(); return 0; }
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