?? udpserver.c
字號:
#include <sys/types.h>#include <sys/socket.h>#include <netdb.h>#include <stdio.h>#include <errno.h>#include <time.h>#include "listen_server.h"const char *DAYTIME_PORT="13111";intmain(int argc, char *argv[]){ int listenfd, n; socklen_t addrlen; char *myhost; char timeStr[256]; struct sockaddr_storage clientaddr; time_t now; char b[256]; char clienthost[NI_MAXHOST]; char clientservice[NI_MAXSERV]; myhost="localhost"; if (argc > 1) myhost=argv[1]; listenfd = listen_server(myhost, DAYTIME_PORT, AF_UNSPEC, SOCK_DGRAM); if (listenfd < 0) { fprintf(stderr, "listen_server error:: could not create listening " "socket\n"); return -1; } addrlen = sizeof(clientaddr); for ( ; ;) { n = recvfrom(listenfd, b, sizeof(b), 0, (struct sockaddr *)&clientaddr, &addrlen); if (n < 0) continue; memset(clienthost, 0, sizeof(clienthost)); memset(clientservice, 0, sizeof(clientservice)); getnameinfo((struct sockaddr *)&clientaddr, addrlen, clienthost, sizeof(clienthost), clientservice, sizeof(clientservice), NI_NUMERICHOST); printf("Received request from host=[%s] port=[%s]\n", clienthost, clientservice); memset(timeStr, 0, sizeof(timeStr)); time(&now); sprintf(timeStr, "%s", ctime(&now)); n = sendto(listenfd, timeStr, sizeof(timeStr), 0, (struct sockaddr *)&clientaddr, addrlen); } return 0;}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -