test_net_udp.c

UCL Common Code Library Routines common to a number of multimedia tools. The library originates

/*
 * FILE:    test_net_udp.c
 * AUTHORS: Colin Perkins
 * 
 * Copyright (c) 2000 University College London
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted provided that the following conditions 
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the Computer Science
 *      Department at University College London
 * 4. Neither the name of the University nor of the Department may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config_unix.h"
#include "config_win32.h"
#include "debug.h"
#include "net_udp.h"
#include "test_net_udp.h"

#define BUFSIZE 1024

static void randomize(char buf[], int buflen)
{
	int	i;

	for (i = 0; i < buflen; i++) {
		buf[i] = (lrand48() && 0xff00) >> 8;
	}
}

void test_net_udp(void)
{
	struct timeval	 timeout;
	socket_udp	*s1, *s2;
	char		 buf1[BUFSIZE], buf2[BUFSIZE];
	const char	*hname;
	int		 rc, i;
	
#ifndef WIN32

	/* "BSD" bug test that appears in this function uses fork and
	 * exec, that are not present on WIN32.  Since the original
	 * bug has not been seen on Win32 it's probably not worth
	 * converting to use CreateProcess() */

	int status_parent, status_child;

#endif /* WIN32 */

	srand48(time(NULL));

	/**********************************************************************/
	/* The first test is to loopback a packet to ourselves...             */
	printf("UDP/IP networking (IPv4 loopback)...... "); fflush(stdout);
	s1 = udp_init("127.0.0.1", 5000, 5000, 1);
	if (s1 == NULL) {
		printf("fail: cannot initialize socket\n");
		return;
	}
	randomize(buf1, BUFSIZE);
	randomize(buf2, BUFSIZE);
	if (udp_send(s1, buf1, BUFSIZE) < 0) {
		perror("fail");
		goto abort_loopback;
	}
	timeout.tv_sec  = 1;
	timeout.tv_usec = 0;
	udp_fd_zero();
	udp_fd_set(s1);
	rc = udp_select(&timeout);
	if (rc < 0) {
		perror("fail");
		goto abort_loopback;
	}
	if (rc == 0) {
		printf("fail: no data waiting\n");
		goto abort_loopback;
	}
	if (!udp_fd_isset(s1)) {
		printf("fail: no data on file descriptor\n");
		goto abort_loopback;
	}
	if (udp_recv(s1, buf2, BUFSIZE) < 0) {
		perror("fail");
		goto abort_loopback;
	}
	if (memcmp(buf1, buf2, BUFSIZE) != 0) {
		printf("fail: buffer corrupt\n");
		goto abort_loopback;
	}
	printf("pass\n");
abort_loopback:
	hname = udp_host_addr(s1); /* we need this for the unicast test... */
	udp_exit(s1);

	/**********************************************************************/
	/* Now we send a packet to ourselves via our real network address...  */
	printf("UDP/IP networking (IPv4 unicast)....... "); fflush(stdout);
	s1 = udp_init(hname, 5000, 5001, 1);
	if (s1 == NULL) {
		printf("fail: cannot initialize socket\n");
		return;
	}

	s2 = udp_init(hname, 5001, 5000, 1);
	if (s2 == NULL) {
		printf("fail: cannot initialize socket\n");
		return;
	}

	randomize(buf1, BUFSIZE);
	randomize(buf2, BUFSIZE);
	if (udp_send(s1, buf1, BUFSIZE) < 0) {
		perror("fail");
		goto abort_unicast;
	}
	timeout.tv_sec  = 1;
	timeout.tv_usec = 0;
	udp_fd_zero();
	udp_fd_set(s1);
	udp_fd_set(s2);
	rc = udp_select(&timeout);
	if (rc < 0) {
		perror("fail");
		goto abort_unicast;
	}
	if (rc == 0) {
		printf("fail: no data waiting (no route to %s?)\n", hname);
		goto abort_unicast;
	}
	if (!udp_fd_isset(s2)) {
		printf("fail: no data on file descriptor\n");
		goto abort_unicast;
	}
	if (udp_recv(s2, buf2, BUFSIZE) < 0) {
		perror("fail");
		goto abort_unicast;
	}
	if (memcmp(buf1, buf2, BUFSIZE) != 0) {
		printf("fail: buffer corrupt\n");
		goto abort_unicast;
	}
	printf("pass\n");
abort_unicast:
	udp_exit(s1);
	udp_exit(s2);

	/**********************************************************************/
	/* Loopback a packet to ourselves via multicast...                    */
	printf("UDP/IP networking (IPv4 multicast)..... "); fflush(stdout);
	s1 = udp_init("224.2.0.1", 5000, 5000, 1);
	if (s1 == NULL) {
		printf("fail: cannot initialize socket\n");
		return;
	}
	randomize(buf1, BUFSIZE);
	randomize(buf2, BUFSIZE);
	if (udp_send(s1, buf1, BUFSIZE) < 0) {
		perror("fail");
		goto abort_multicast;
	}
	timeout.tv_sec  = 1;
	timeout.tv_usec = 0;
	udp_fd_zero();
	udp_fd_set(s1);
	rc = udp_select(&timeout);
	if (rc < 0) {
		perror("fail");
		goto abort_multicast;
	}
	if (rc == 0) {
		printf("fail: no data waiting (no multicast loopback route?)\n");
		goto abort_multicast;
	}
	if (!udp_fd_isset(s1)) {
		printf("fail: no data on file descriptor\n");
		goto abort_multicast;
	}
	if (udp_recv(s1, buf2, BUFSIZE) < 0) {
		perror("fail");
		goto abort_multicast;
	}
	if (memcmp(buf1, buf2, BUFSIZE) != 0) {
		printf("fail: buffer corrupt\n");
		goto abort_multicast;
	}
	printf("pass\n");
abort_multicast:
	udp_exit(s1);

	/**********************************************************************/
	/* Loopback a packet to ourselves via multicast, checking lengths...  */
	printf("UDP/IP networking (IPv4 length check).. "); fflush(stdout);
	s1 = udp_init("224.2.0.1", 5000, 5000, 1);
	if (s1 == NULL) {
		printf("fail: cannot initialize socket\n");
		return;
	}
	for (i = 1; i < BUFSIZE; i++) {
		randomize(buf1, i);
		randomize(buf2, i);
	        if (udp_send(s1, buf1, i) < 0) {
                	perror("fail");
                	goto abort_length;
        	}
        	timeout.tv_sec  = 1;
        	timeout.tv_usec = 0;
        	udp_fd_zero();
        	udp_fd_set(s1);
        	rc = udp_select(&timeout);
        	if (rc < 0) {
                	perror("fail");
                	goto abort_length;
        	}
        	if (rc == 0) {
                	printf("fail: no data waiting (no multicast loopback route?)\n");
                	goto abort_length;
        	}
        	if (!udp_fd_isset(s1)) {
                	printf("fail: no data on file descriptor\n");
                	goto abort_length;
        	}
        	if (udp_recv(s1, buf2, BUFSIZE) != i) {
                	perror("fail");
                	goto abort_length; 
        	}
        	if (memcmp(buf1, buf2, i) != 0) {
                	printf("fail: buffer corrupt\n"); 
                	goto abort_length;
        	}
	}
        printf("pass\n");
abort_length:
        udp_exit(s1);



#ifdef HAVE_IPv6
	/**********************************************************************/
	/* The first test is to loopback a packet to ourselves...             */
	printf("UDP/IP networking (IPv6 loopback)...... "); fflush(stdout);
	s1 = udp_init("::1", 5000, 5000, 1);
	if (s1 == NULL) {
		printf("fail: cannot initialize socket\n");
		return;
	}
	randomize(buf1, BUFSIZE);
	randomize(buf2, BUFSIZE);
	if (udp_send(s1, buf1, BUFSIZE) < 0) {
		perror("fail");
		goto abort_loopback_ipv6;
	}
	timeout.tv_sec  = 1;
	timeout.tv_usec = 0;
	udp_fd_zero();
	udp_fd_set(s1);
	rc = udp_select(&timeout);
	if (rc < 0) {
		perror("fail");
		goto abort_loopback_ipv6;
	}
	if (rc == 0) {
		printf("fail: no data waiting\n");
		goto abort_loopback_ipv6;
	}
	if (!udp_fd_isset(s1)) {
		printf("fail: no data on file descriptor\n");
		goto abort_loopback_ipv6;
	}
	if (udp_recv(s1, buf2, BUFSIZE) < 0) {
		perror("fail");
		goto abort_loopback_ipv6;
	}
	if (memcmp(buf1, buf2, BUFSIZE) != 0) {
		printf("fail: buffer corrupt\n");
		goto abort_loopback_ipv6;
	}
	printf("pass\n");
abort_loopback_ipv6:
	udp_exit(s1);

	/**********************************************************************/
	/* Loopback a packet to ourselves via multicast. The address is the   */
	/* SAP address, but we use a different port.                          */
	printf("UDP/IP networking (IPv6 multicast)..... "); fflush(stdout);
	s1 = udp_init("ff01::2:7ffe", 5000, 5000, 1);
	if (s1 == NULL) {
		printf("fail: cannot initialize socket\n");
		return;
	}
	randomize(buf1, BUFSIZE);
	randomize(buf2, BUFSIZE);
	if (udp_send(s1, buf1, BUFSIZE) < 0) {
		perror("fail");
		goto abort_multicast_ipv6;
	}
	timeout.tv_sec  = 1;
	timeout.tv_usec = 0;
	udp_fd_zero();
	udp_fd_set(s1);
	rc = udp_select(&timeout);
	if (rc < 0) {
		perror("fail");
		goto abort_multicast_ipv6;
	}
	if (rc == 0) {
		printf("fail: no data waiting (no multicast loopback route?)\n");
		goto abort_multicast_ipv6;
	}
	if (!udp_fd_isset(s1)) {
		printf("fail: no data on file descriptor\n");
		goto abort_multicast_ipv6;
	}
	if (udp_recv(s1, buf2, BUFSIZE) < 0) {
		perror("fail");
		goto abort_multicast_ipv6;
	}
	if (memcmp(buf1, buf2, BUFSIZE) != 0) {
		printf("fail: buffer corrupt\n");
		goto abort_multicast_ipv6;
	}
	hname = udp_host_addr(s1); /* we need this for the unicast test... */
	printf("pass\n");
abort_multicast_ipv6:
	udp_exit(s1);
#else
	printf("UDP/IP networking (IPv6 loopback)...... disabled\n");
	printf("UDP/IP networking (IPv6 unicast)....... disabled\n");
	printf("UDP/IP networking (IPv6 multicast)..... disabled\n");
#endif

	/**********************************************************************/

#ifdef WIN32
	printf("UDP/IP networking (FreeBSD bug)........ disabled\n");
#else
	printf("UDP/IP networking (FreeBSD bug)........ "); fflush(stdout);
	status_parent = 0;
	randomize(buf1, 64);
	s1 = udp_init("224.2.0.1", 5000, 5000, 1);
	if (s1 == NULL) {
		printf("fail (parent): cannot initialize socket\n");
		return;
	}
	rc = fork();
	if (rc == -1) {
		printf("fail: cannot fork\n");
		goto abort_bsd;
	} else if (rc == 0) {
		/* child */
		s2 = udp_init("224.2.0.1", 5000, 5000, 1);
		if (s2 == NULL) {
			printf("fail (child): cannot initialize socket\n");
			exit(0);
		}
		if (udp_send(s2, buf1, 64) < 0) {
			perror("fail (child)");
			exit(0);
		}
	        timeout.tv_sec  = 10;
        	timeout.tv_usec = 0;
        	udp_fd_zero();
        	udp_fd_set(s2);
        	rc = udp_select(&timeout);
		if (rc < 0) {
			perror("fail (child)");
			exit(0);
		}
		if (rc == 0) {
			printf("fail (child): no data waiting (no multicast loopback route?)\n");
			exit(0);
		}
		if (!udp_fd_isset(s2)) {
			printf("fail (child): no data on file descriptor\n");
			exit(0);
		}
		rc = udp_recv(s2, buf2, BUFSIZE);
		if (rc < 0) {
			perror("fail (child)");
			exit(0);
		}
		if (rc != 64) {
			printf("fail (child): read size incorrect (%d != %d)\n", rc, 64);
			exit(0);
		}
		if (memcmp(buf1, buf2, 64) != 0) {
			printf("fail (child): buffer corrupt\n");
			exit(0);
		}
		udp_exit(s2);
		exit(1);
	} else {
		/* parent */
                timeout.tv_sec  = 10;
                timeout.tv_usec = 0;
                udp_fd_zero();
                udp_fd_set(s1);
                rc = udp_select(&timeout);
		if (rc < 0) {
			perror("fail (parent)");
			goto abort_bsd;
		}
		if (rc == 0) {
			printf("fail (parent): no data waiting (no multicast loopback route?)\n");
			goto abort_bsd;
		}
		if (!udp_fd_isset(s1)) {
			printf("fail (parent): no data on file descriptor\n");
			goto abort_bsd;
		}
                rc = udp_recv(s1, buf2, BUFSIZE);
                if (rc < 0) {
                        perror("fail (parent)");
			goto abort_bsd;
                }
                if (rc != 64) {
                        printf("fail (parent): read size incorrect (%d != %d)\n", rc, 64);
			goto abort_bsd;
                }
		if (memcmp(buf1, buf2, 64) != 0) {
			printf("fail (parent): buffer corrupt\n");
			goto abort_bsd;
		}
		status_parent = 1;
	}
abort_bsd:
	wait(&status_child);
	if (status_parent && status_child) {
		printf("pass\n");
	}
	udp_exit(s1);
#endif /* WIN32 */

	return;
}