gcc.zip_C语言_DEMO_pickuyh

#include <WinSock2.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #pragma comment(lib,"Ws2_32.lib ") int main(int argc, char* argv[]) { SOCKET serSocket; struct sockaddr_in serAddr; struct sockaddr_in remoteAddr; int nAddrLen; WSADATA wsaData; WORD sockVersion = MAKEWORD(2,2); if(WSAStartup(sockVersion, &wsaData) != 0) { return 0; } serSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if(serSocket == INVALID_SOCKET) { printf("socket error !"); return 0; } serAddr.sin_family = AF_INET; serAddr.sin_port = htons(8888); serAddr.sin_addr.S_un.S_addr = INADDR_ANY; if(bind(serSocket, (struct sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR) { printf("bind error !"); closesocket(serSocket); return 0; } nAddrLen = sizeof(remoteAddr); while (1) { char recvData[255]; int ret = recvfrom(serSocket, recvData, 255, 0, (struct sockaddr *)&remoteAddr, &nAddrLen); if (ret > 0) { recvData[ret] = 0x00; printf("接受到一个连接：%s \r\n", inet_ntoa(remoteAddr.sin_addr)); printf(recvData); ret = 0; sendto(serSocket, "一个来自服务端的UDP数据包\n", strlen("一个来自服务端的UDP数据包\n"), 0, (struct sockaddr *)&remoteAddr, nAddrLen); } } closesocket(serSocket); return 0; }