1 #include "unp.h"
2
3 int
main(int argc,char ** argv)4 main(int argc, char **argv)
5 {
6 int sockfd, n;
7 socklen_t len;
8 char recvline[MAXLINE + 1];
9 struct sockaddr_in servaddr, cliaddr;
10
11 if (argc != 2)
12 err_quit("usage: a.out <IPaddress>");
13
14 if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
15 err_sys("socket error");
16
17 bzero(&servaddr, sizeof(servaddr));
18 servaddr.sin_family = AF_INET;
19 servaddr.sin_port = htons(13); /* daytime server */
20 if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)
21 err_quit("inet_pton error for %s", argv[1]);
22
23 if (connect(sockfd, (SA *) &servaddr, sizeof(servaddr)) < 0)
24 err_sys("connect error");
25
26 len = sizeof(cliaddr);
27 Getsockname(sockfd, (SA *) &cliaddr, &len);
28 printf("local addr: %s\n",
29 Sock_ntop((SA *) &cliaddr, sizeof(cliaddr)));
30
31 while ( (n = read(sockfd, recvline, MAXLINE)) > 0) {
32 recvline[n] = 0; /* null terminate */
33 if (fputs(recvline, stdout) == EOF)
34 err_sys("fputs error");
35 }
36 if (n < 0)
37 err_sys("read error");
38
39 exit(0);
40 }
41