tst-filter-master.c

/*
 * tst-filter-master.c
 *
 * Copyright (c) 2008 Volkswagen Group Electronic Research
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are 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. Neither the name of Volkswagen nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * Alternatively, provided that this notice is retained in full, this
 * software may be distributed under the terms of the GNU General
 * Public License ("GPL") version 2, in which case the provisions of the
 * GPL apply INSTEAD OF those given above.
 *
 * The provided data structures and external interfaces from this code
 * are not restricted to be used by modules with a GPL compatible license.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS 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 COPYRIGHT
 * OWNER 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.
 *
 * Send feedback to <linux-can@vger.kernel.org>
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>

#include <linux/can.h>
#include <linux/can/raw.h>

int main(int argc, char **argv)
{
	int s;
	struct sockaddr_can addr;
	struct can_filter rfilter;
	struct can_frame frame;
	int testcase;
	int nbytes;
	struct ifreq ifr;
	int ifindex;


	if ((s = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0) {
		perror("socket");
		return 1;
	}

	strcpy(ifr.ifr_name, "vcan0");
	ioctl(s, SIOCGIFINDEX, &ifr);
	ifindex = ifr.ifr_ifindex;

	addr.can_family = AF_CAN;
	addr.can_ifindex = ifindex;

	rfilter.can_id   = 0xFA; /* receive only the filter ack */
	rfilter.can_mask = CAN_SFF_MASK | CAN_EFF_FLAG | CAN_RTR_FLAG;
	setsockopt(s, SOL_CAN_RAW, CAN_RAW_FILTER, &rfilter, sizeof(rfilter));

	if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
		perror("bind");
		return 1;
	}

	/* send testcases 0 .. 17 and a terminating 18 to quit */
	for (testcase = 0; testcase < 19; testcase++) {

		printf("Sending testcase %2d ... ", testcase);
		frame.can_id = 0x0F;
		frame.can_dlc = 1;
		frame.data[0] = testcase;

		if (write(s, &frame, sizeof(frame)) < 0) {
			perror("write");
			exit(1);
		}

		/* wait for ACK from server */
		if ((nbytes = read(s, &frame, sizeof(struct can_frame))) < 0) {
			perror("read");
			exit(1);
		}

		if (nbytes < sizeof(struct can_frame)) {
			fprintf(stderr, "read: incomplete CAN frame\n");
			exit(1);
		}

		if ((frame.can_id != 0xFA) || (frame.can_dlc != 1) ||
		    (frame.data[0] != testcase)) {
			fprintf(stderr, "\nWrong answer from server!\n");
			exit(1);
		}

		printf("acked. ");
		if (testcase > 17)
			break;

		/* interactive mode, when there is any commandline option */
		if (argc == 2) {
			printf("[press enter] ");
			getchar();
		}

		printf("Sending patterns ... ");

		frame.can_dlc = 0;

		frame.can_id = 0x123;
		if (write(s, &frame, sizeof(frame)) < 0) {
			perror("write");
			exit(1);
		}
		frame.can_id = (0x123 | CAN_RTR_FLAG);
		if (write(s, &frame, sizeof(frame)) < 0) {
			perror("write");
			exit(1);
		}
		frame.can_id = (0x123 | CAN_EFF_FLAG);
		if (write(s, &frame, sizeof(frame)) < 0) {
			perror("write");
			exit(1);
		}
		frame.can_id = (0x123 | CAN_EFF_FLAG | CAN_RTR_FLAG);
		if (write(s, &frame, sizeof(frame)) < 0) {
			perror("write");
			exit(1);
		}

		printf("ok\n");
	}

	printf("Filtertest done.\n");

	close(s);
	return 0;
}