h_tcp_srv1.c

T－kernel Tcp/ip Protocol Stack Sample

/*
 *  Copyright (C) 1999-2006 MITSUBISHI ELECTRIC CORPORATION and
 *  RENESAS SOLUTIONS CORPORATION and
 *  RENESAS TECHNOLOGY CORPORATION
 *  All rights reserved.
 *
 *  Test program for recv() on LAN.
 */

#include <stdio.h>
#include <signal.h>
#include <ctype.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>

#include "config.h"

extern int errno;

int sd, newsd;

void sig_hdr()
{
	/* printf("received SIGINT.\n"); */
	shutdown(sd, SHUT_RDWR);
	shutdown(newsd, SHUT_RDWR);

	close(sd);
	close(newsd);
	exit(0);
}

/*
 * TCP server program
 */
main(argc, argv)
int	argc;
char **argv;
{
	int i, j, len;
	char ch, buf[SIZE], buf2[SIZE];
	struct sockaddr_in	sinme, sindst;
	int addrlen;
	
signal(SIGINT, sig_hdr);

	/* create an endpoint for TCP communication */
	if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
		printf("socket is NG.\n");
		return (1);
	}
	printf("socket is OK.\n");
	
	/* bind an address to the socket */
	memset((char *)&sinme, 0, sizeof(struct sockaddr_in));
	sinme.sin_family = AF_INET;
	sinme.sin_addr.s_addr = inet_addr(MY_ADDR);
	sinme.sin_port = htons(PORT_NUM2);
	if (bind(sd, (struct sockaddr *)&sinme, sizeof(struct sockaddr_in)) < 0) {
		printf("bind is NG.\n");
		close(sd);
		return (1);
	}
	printf("bind is OK.\n");

	/* listen for connections on the socket */
	listen(sd, 5);

	ch = 'A' - 0x01;
	for (i=0; i < sizeof(buf); i++) {
		if (ch < 'z') ch += 0x01;
		else ch = 'A';
		buf[i] = ch;
	}

	for (j=1; j >= 1; j++) {
		/* accept a connection on the socket */
		memset((char *)&sindst, 0, sizeof(struct sockaddr_in));
		addrlen = sizeof(sindst);
		if ((newsd=accept(sd, (struct sockaddr *)&sindst, &addrlen)) < 0) {
			printf("(%d)accept is NG.(errno=%d)\n", j, errno);
			close(sd);
			break;
		}
		printf("(%d)accept is OK.\n", j);
	
		/* clear data contents */
		memset(buf2, 0, sizeof(buf2));

		/* receive data */
		if ((len = recv(newsd, buf2, sizeof(buf2), 0)) < 0) {
			printf("(%d)receiving TCP data is NG.\n", j);
			close(newsd);
			break;
		}
		printf("(%d)receiving TCP data is OK.(size=%d)\n", j, len);
		if (len == 0) {
			shutdown(newsd, SHUT_RDWR);
			close(newsd);
			break;
		}

		/* check data contesnts */
		for (i=0; i < len; i++) {
			if (buf2[i] != buf[i]) {
				break;
			}
		}
		if (i < len) {
			printf("(%d)checking TCP data contents is NG.\n", j);
			close(newsd);
			break;
		}
		printf("(%d)checking TCP data contents is OK.\n", j);

		/* send data */
		if ((len = send(newsd, buf, len, 0)) < 0) {
			printf("(%d)sending TCP data is NG.\n", j);
			close(newsd);
			break;
		}
		printf("(%d)sending TCP data is OK.(size=%d)\n", j, len);

		/* shut down sending data */
		if (shutdown(newsd, SHUT_RDWR) < 0) {
			printf("(%d)shutdown is NG.(errno=%d)\n", j, errno);
		}
		printf("(%d)shutdown is OK.\n", j);

		if (close(newsd) < 0) {
			printf("(%d)close is NG.(errno=%d)\n", j, errno);
		}
		printf("(%d)close is OK.\n\n", j);
	}
	shutdown(sd, SHUT_RDWR);
	close(sd);
	sleep(2);
	printf("\nPass.\n");

	return (0);
}

/* EOF */