#include <errno.h>
#include <linux/can.h>
#include <net/if.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>

int main(int argc, char *argv[])
{
	const char *if_name = "can0";
	int sockfd;
	struct ifreq req = {};
	struct sockaddr_can sockaddr = {};
	struct can_frame frame = {};
	struct timeval tv;
	char timestr[16];

	sockfd = socket(AF_CAN, SOCK_RAW, CAN_RAW);

	strncpy(req.ifr_name, if_name, IF_NAMESIZE);
	ioctl(sockfd, SIOCGIFINDEX, &req);

	sockaddr.can_family = AF_CAN;
	sockaddr.can_ifindex = req.ifr_ifindex;

	bind(sockfd, (const struct sockaddr *) &sockaddr, sizeof(sockaddr));

	frame.can_dlc = 8;
	memset(frame.data, 0xee, 8);
	for (int i = 0; i < 1000; ++i)
	{
		frame.can_id = (i & 0x7ff);
		send(sockfd, &frame, sizeof(frame), 0);
	}

	close(sockfd);

	gettimeofday(&tv, NULL);
	strftime(timestr, sizeof(timestr), "%H:%M:%S", localtime(&tv.tv_sec));
	printf("Socket closed at %s.%06ld\n", timestr, tv.tv_usec);

	return 0;
}