/*
- * $Id$
- */
-
-/*
* slcan_attach.c - userspace tool for serial line CAN interface driver SLCAN
*
* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
- * Send feedback to <socketcan-users@lists.berlios.de>
+ * Send feedback to <linux-can@vger.kernel.org>
*
*/
#include <fcntl.h>
#include <unistd.h>
#include <getopt.h>
+#include <sys/socket.h>
#include <sys/ioctl.h>
+#include <net/if.h>
+#include <termios.h>
#define LDISC_N_SLCAN 17 /* default slcan line discipline since Kernel 2.6.25 */
fprintf(stderr, "\nUsage: %s [options] tty\n\n", prg);
fprintf(stderr, "Options: -o (send open command 'O\\r')\n");
fprintf(stderr, " -c (send close command 'C\\r')\n");
+ fprintf(stderr, " -f (read status flags with 'F\\r' to reset error states)\n");
fprintf(stderr, " -s <speed> (set CAN speed 0..8)\n");
fprintf(stderr, " -b <btr> (set bit time register value)\n");
fprintf(stderr, " -d (only detach line discipline)\n");
fprintf(stderr, " -w (attach - wait for keypess - detach)\n");
+ fprintf(stderr, " -n <name> (assign created netdevice name)\n");
fprintf(stderr, "\nExamples:\n");
- fprintf(stderr, "slcan_attach -w -o -s6 -c /dev/ttyS1\n");
+ fprintf(stderr, "slcan_attach -w -o -f -s6 -c /dev/ttyS1\n");
fprintf(stderr, "slcan_attach /dev/ttyS1\n");
fprintf(stderr, "slcan_attach -d /dev/ttyS1\n");
+ fprintf(stderr, "slcan_attach -w -n can15 /dev/ttyS1\n");
fprintf(stderr, "\n");
exit(1);
}
int waitkey = 0;
int send_open = 0;
int send_close = 0;
+ int send_read_status_flags = 0;
char *speed = NULL;
char *btr = NULL;
- char buf[10];
+ char buf[IFNAMSIZ+1];
char *tty;
+ char *name = NULL;
int opt;
- while ((opt = getopt(argc, argv, "l:dwocs:b:")) != -1) {
+ while ((opt = getopt(argc, argv, "l:dwocfs:b:n:?")) != -1) {
switch (opt) {
case 'l':
fprintf(stderr, "Ignored option '-l'\n");
send_close = 1;
break;
+ case 'f':
+ send_read_status_flags = 1;
+ break;
+
case 's':
speed = optarg;
if (strlen(speed) > 1)
print_usage(argv[0]);
break;
+ case 'n':
+ name = optarg;
+ if (strlen(name) > IFNAMSIZ-1)
+ print_usage(argv[0]);
+ break;
+
+ case '?':
default:
print_usage(argv[0]);
break;
if (waitkey || !detach) {
if (speed) {
- sprintf(buf, "S%s\r", speed);
+ sprintf(buf, "C\rS%s\r", speed);
write(fd, buf, strlen(buf));
}
if (btr) {
- sprintf(buf, "s%s\r", btr);
+ sprintf(buf, "C\rs%s\r", btr);
+ write(fd, buf, strlen(buf));
+ }
+
+ if (send_read_status_flags) {
+ sprintf(buf, "F\r");
write(fd, buf, strlen(buf));
}
write(fd, buf, strlen(buf));
}
+ /* set slcan line discipline on given tty */
if (ioctl (fd, TIOCSETD, &ldisc) < 0) {
- perror("ioctl");
+ perror("ioctl TIOCSETD");
+ exit(1);
+ }
+
+ /* retrieve the name of the created CAN netdevice */
+ if (ioctl (fd, SIOCGIFNAME, buf) < 0) {
+ perror("ioctl SIOCGIFNAME");
exit(1);
}
+
+ printf("attached tty %s to netdevice %s\n", tty, buf);
+
+ /* try to rename the created device if requested */
+ if (name) {
+ struct ifreq ifr;
+ int s = socket(PF_INET, SOCK_DGRAM, 0);
+
+ printf("rename netdevice %s to %s ... ", buf, name);
+
+ if (s < 0)
+ perror("socket for interface rename");
+ else {
+ strncpy (ifr.ifr_name, buf, IFNAMSIZ);
+ strncpy (ifr.ifr_newname, name, IFNAMSIZ);
+
+ if (ioctl(s, SIOCSIFNAME, &ifr) < 0)
+ printf("failed!\n");
+ else
+ printf("ok.\n");
+
+ close(s);
+ }
+ }
}
if (waitkey) {