net-timeserver.rar_socket server .net

#include <sys/types.h> /* basic system data types */ #include <sys/socket.h> /* basic socket definitions */ #include <sys/time.h> /* timeval{} for select() */ #include <time.h> /* timespec{} for pselect() */ #include <netinet/in.h> /* sockaddr_in{} and other Internet defns */ #include <errno.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/wait.h> /* Miscellaneous constants */ #define MAXLINE 4096 /* max text line length */ #define MAXSOCKADDR 128 /* max socket address structure size */ #define BUFFSIZE 8192 /* buffer size for reads and writes */ /* Define some port number that can be used for client-servers */ #define SERV_PORT 9877 /* TCP and UDP client-servers */ #define SERV_PORT_STR "9877" /* TCP and UDP client-servers */ #define SA struct sockaddr int main(int argc, char **argv) { int sockfd, n; char recvline[MAXLINE + 1]; struct sockaddr_in servaddr; if (argc != 2) printf("usage: a.out <IPaddress>"); if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) printf("socket error"); bzero(&servaddr, sizeof(servaddr)); servaddr.sin_family = AF_INET; servaddr.sin_port = htons(13); /* daytime server */ if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0) printf("inet_pton error for %s", argv[1]); if (connect(sockfd, (SA *) &servaddr, sizeof(servaddr)) < 0) printf("connect error"); while ( (n = read(sockfd, recvline, MAXLINE)) > 0) { recvline[n] = 0; /* null terminate */ if (fputs(recvline, stdout) == EOF) printf("fputs error"); } if (n < 0) printf("read error"); exit(0); }