c++接收本机UDP数据

#include <iostream> #include <WinSock2.h> #include <WS2tcpip.h> #pragma comment(lib, "ws2_32.lib") #define PORT 8080 int main() { WSADATA wsaData; WSAStartup(MAKEWORD(2, 2), &wsaData); SOCKET sockfd = socket(AF_INET, SOCK_DGRAM, 0); if (sockfd == INVALID_SOCKET) { std::cerr << "Error creating socket" << std::endl; WSACleanup(); return 1; } sockaddr_in serverAddr; serverAddr.sin_family = AF_INET; serverAddr.sin_port = htons(PORT); serverAddr.sin_addr.s_addr = INADDR_ANY; if (bind(sockfd, (sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) { std::cerr << "Bind failed" << std::endl; closesocket(sockfd); WSACleanup(); return 1; } int data[3]; sockaddr_in clientAddr; int clientAddrSize = sizeof(clientAddr); int bytesReceived = recvfrom(sockfd, (char*)data, sizeof(data), 0, (sockaddr*)&clientAddr, &clientAddrSize); if (bytesReceived == SOCKET_ERROR) { std::cerr << "Error receiving data" << std::endl; } else { int data_1 = ntohl(data[0]); int data_2 = ntohl(data[1]); int data_3 = ntohl(data[2]); std::cout << "Received data: " << data_1 << ", " << data_2 << ", " << data_3 << std::endl; } closesocket(sockfd); WSACleanup(); return 0; }