-/*
- * $Id$
- */
-
/*
* slcan_attach.c - userspace tool for serial line CAN interface driver SLCAN
*
* 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 <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <getopt.h>
+#include <sys/socket.h>
#include <sys/ioctl.h>
-#include <linux/tty.h> /* thanks for cleanup since 2.6.21 */
-//#include <asm/termios.h> /* ldiscs for each arch up to 2.6.20 */
+#include <net/if.h>
+#include <termios.h>
+#include <linux/tty.h>
+#include <linux/sockios.h>
-#ifndef N_SLCAN
-#error Your kernel includes do not provide the needed line discipline.
-#error This is a normal behaviour for Kernel versions < v2.6.25 .
-#error You might update or patch your kernel OR you can just ignore
-#error this compilation failure if you do not need the slcan driver.
-#endif
-
-void usage(char *name)
+void print_usage(char *prg)
{
- fprintf(stderr, "Usage: %s [-d] [-l ldisc] tty\n", name);
+ fprintf(stderr, "\nUsage: %s [options] tty\n\n", prg);
+ fprintf(stderr, "Options: -o (send open command 'O\\r')\n");
+ fprintf(stderr, " -l (send listen only command 'L\\r', overrides -o)\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 -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 main(int argc, char **argv)
{
int fd;
- int ldisc = N_SLCAN; /* default */
+ int ldisc = N_SLCAN;
int detach = 0;
+ int waitkey = 0;
+ int send_open = 0;
+ int send_listen = 0;
+ int send_close = 0;
+ int send_read_status_flags = 0;
+ char *speed = NULL;
+ char *btr = NULL;
+ char buf[IFNAMSIZ+1];
char *tty;
+ char *name = NULL;
int opt;
- while ((opt = getopt(argc, argv, "l:d")) != -1) {
+ while ((opt = getopt(argc, argv, "ldwocfs:b:n:?")) != -1) {
switch (opt) {
+ case 'd':
+ detach = 1;
+ break;
+
+ case 'w':
+ waitkey = 1;
+ break;
+
+ case 'o':
+ send_open = 1;
+ break;
+
case 'l':
- ldisc = atoi(optarg);
+ send_listen = 1;
break;
- case 'd':
- detach = 1;
+ case 'c':
+ 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 'b':
+ btr = optarg;
+ if (strlen(btr) > 6)
+ print_usage(argv[0]);
+ break;
+
+ case 'n':
+ name = optarg;
+ if (strlen(name) > IFNAMSIZ-1)
+ print_usage(argv[0]);
+ break;
+
+ case '?':
default:
- usage(argv[0]);
+ print_usage(argv[0]);
break;
}
}
if (argc - optind != 1)
- usage(argv[0]);
+ print_usage(argv[0]);
tty = argv[optind];
- if ((fd = open (tty, O_RDONLY | O_NOCTTY)) < 0) {
+ if ((fd = open (tty, O_WRONLY | O_NOCTTY)) < 0) {
perror(tty);
exit(1);
}
- if (detach)
+ if (waitkey || !detach) {
+
+ if (speed) {
+ sprintf(buf, "C\rS%s\r", speed);
+ write(fd, buf, strlen(buf));
+ }
+
+ if (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));
+ }
+
+ if (send_listen) {
+ sprintf(buf, "L\r");
+ write(fd, buf, strlen(buf));
+ } else if (send_open) {
+ sprintf(buf, "O\r");
+ write(fd, buf, strlen(buf));
+ }
+
+ /* set slcan line discipline on given tty */
+ if (ioctl (fd, TIOCSETD, &ldisc) < 0) {
+ 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) {
+ printf("Press any key to detach %s ...\n", tty);
+ getchar();
+ }
+
+ if (waitkey || detach) {
ldisc = N_TTY;
+ if (ioctl (fd, TIOCSETD, &ldisc) < 0) {
+ perror("ioctl");
+ exit(1);
+ }
- if (ioctl (fd, TIOCSETD, &ldisc) < 0) {
- perror("ioctl");
- exit(1);
+ if (send_close) {
+ sprintf(buf, "C\r");
+ write(fd, buf, strlen(buf));
+ }
}
close(fd);
projects / can-utils.git / blobdiff