h_tcp_srv5.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.
 *
 */

#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);
	sleep(2);
	exit(0);
}

#define SIZE (16*1024)

/*
 * TCP server program
 */
main(argc, argv)
int	argc;
char **argv;
{
	int i, j, k, len;
	char ch, *buf, *buf2;
	struct sockaddr_in	sinme, sindst;
	int size, total, addrlen;
	
	size = SIZE;

	errno = 0;
#ifdef TMP
	buf = (char *)malloc(size);
	if (buf == NULL) {
		printf("malloc is NG.\n");
		exit(1);
	}
#endif

	buf2 = (char *)malloc(size);
	if (buf2 == NULL) {
		printf("malloc is NG.\n");
		exit(1);
	}

signal(SIGINT, sig_hdr);

	/* create an endpoint for TCP communication */
	errno = 0;
	if ((sd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
		printf("socket is NG.(errno=%d)\n", errno);
		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.(errno=%d)\n", errno);
		close(sd);
		return (1);
	}
	printf("bind is OK.\n");

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

	ch = 'a';

#ifdef TMP
	/* clear data contents */
	memset(buf, ch, size);
#endif

	for (j=1; j >= 1; j++) {
		errno = 0;

		/* 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, size);

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

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

		if (total == 0) {
			printf("(%d)receiving TCP data is OK.(total size=%d)\n", j, total);
			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);
			break;
		}

		if (total != size) {
			printf("(%d)receiving TCP data is NG.(total size=%d)\n", j, total);
			close(newsd);
			break;
		}
		else {
			printf("(%d)receiving TCP data is OK.(total size=%d)\n", j, total);
		}

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

		/* 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);
	}

err:
	shutdown(sd, SHUT_RDWR);
	close(sd);
#ifdef TMP
	free(buf);
#endif
	free(buf2);

	printf("Pass.\n");
	sleep(2);

	return (0);
}

/* EOF */