目录
1 send.cpp
2 receive.cpp
3 编译运行
4 测试
1 send.cpp
#include <iostream>
#include <string>
#include <cstring>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h> // 添加这个头文件
#include <thread>void sendData() {int sockfd;struct sockaddr_in serverAddr;// 创建UDP socketsockfd = socket(AF_INET, SOCK_DGRAM, 0);if (sockfd < 0) {std::cerr << "Failed to create socket" << std::endl;return;}// 设置服务器地址和端口serverAddr.sin_family = AF_INET;serverAddr.sin_port = htons(12345);serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");while (true) {// 发送数据std::string message = "Hello, UDP!";sendto(sockfd, message.c_str(), message.length(), 0, (struct sockaddr*)&serverAddr, sizeof(serverAddr));std::cout << "Sent: " << message << std::endl;sleep(1); // 每秒发送一次}close(sockfd);
}int main() {std::thread sender(sendData);sender.join(); // 等待发送线程结束return 0;
}
2 receive.cpp
#include <iostream>
#include <string>
#include <cstring>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <thread>void receiveData() {int sockfd;struct sockaddr_in serverAddr, clientAddr;socklen_t addrLen = sizeof(clientAddr);char buffer[1024];// 创建UDP socketsockfd = socket(AF_INET, SOCK_DGRAM, 0);if (sockfd < 0) {std::cerr << "Failed to create socket" << std::endl;return;}// 设置服务器地址和端口serverAddr.sin_family = AF_INET;serverAddr.sin_port = htons(12345);serverAddr.sin_addr.s_addr = INADDR_ANY;// 绑定地址和端口bind(sockfd, (struct sockaddr*)&serverAddr, sizeof(serverAddr));while (true) {// 接收数据int bytesReceived = recvfrom(sockfd, buffer, 1024, 0, (struct sockaddr*)&clientAddr, &addrLen);buffer[bytesReceived] = '\0';std::cout << "Received: " << buffer << std::endl;}close(sockfd);
}int main() {std::thread receiver(receiveData);receiver.join(); // 等待接收线程结束return 0;
}
3 编译运行
g++ -o receive_test receive.cpp -lpthread
g++ -o send_test send.cpp -lpthread4 测试
直接把板子连接到我家的电视上，
参考文献：C++怎么实现udp发送和接收-开发者知识库平台 - 辰迅云
