tpi_daytime.c

unix网络编程卷1：套接口API的全书源码

#include	"tpi_daytime.h"

int
main(int argc, char **argv)
{
	int					fd, n;
	char				recvline[MAXLINE + 1];
	struct sockaddr_in	myaddr, servaddr;

	if (argc != 2)
		err_quit("usage: tpi_daytime <IPaddress>");

	fd = Open(XTI_TCP, O_RDWR, 0);

		/*4bind any local address */
	bzero(&myaddr, sizeof(myaddr));
	myaddr.sin_family = AF_INET;
	myaddr.sin_addr.s_addr = htonl(INADDR_ANY);
	myaddr.sin_port = htons(0);

	tpi_bind(fd, &myaddr, sizeof(struct sockaddr_in));

		/*4fill in server's address */
	bzero(&servaddr, sizeof(servaddr));
	servaddr.sin_family = AF_INET;
	servaddr.sin_port   = htons(13);	/* daytime server */
	Inet_pton(AF_INET, argv[1], &servaddr.sin_addr);

	tpi_connect(fd, &servaddr, sizeof(struct sockaddr_in));

	for ( ; ; ) {
		if ( (n = tpi_read(fd, recvline, MAXLINE)) <= 0) {
			if (n == 0)
				break;
			else
				err_sys("tpi_read error");
		}
		recvline[n] = 0;		/* null terminate */
		fputs(recvline, stdout);
	}
	tpi_close(fd);
	exit(0);
}