-/*
- * $Id$
- */
-
/*
* isotprecv.c
*
#include <linux/can/isotp.h>
#define NO_CAN_ID 0xFFFFFFFFU
+#define BUFSIZE 5000 /* size > 4095 to check socket API internal checks */
void print_usage(char *prg)
{
fprintf(stderr, "\nUsage: %s [options] <CAN interface>\n", prg);
fprintf(stderr, "Options: -s <can_id> (source can_id. Use 8 digits for extended IDs)\n");
fprintf(stderr, " -d <can_id> (destination can_id. Use 8 digits for extended IDs)\n");
- fprintf(stderr, " -x <addr> (extended addressing mode.)\n");
- fprintf(stderr, " -p <byte> (set and enable padding byte)\n");
- fprintf(stderr, " -P <mode> (check padding in SF/CF. (l)ength (c)ontent (a)ll)\n");
+ fprintf(stderr, " -x <addr>[:<rxaddr>] (extended addressing / opt. separate rxaddr)\n");
+ fprintf(stderr, " -p [tx]:[rx] (set and enable tx/rx padding bytes)\n");
+ fprintf(stderr, " -P <mode> (check rx padding for (l)ength (c)ontent (a)ll)\n");
fprintf(stderr, " -b <bs> (blocksize. 0 = off)\n");
fprintf(stderr, " -m <val> (STmin in ms/ns. See spec.)\n");
fprintf(stderr, " -f <time ns> (force rx stmin value in nanosecs)\n");
fprintf(stderr, " -w <num> (max. wait frame transmissions.)\n");
fprintf(stderr, " -l (loop: do not exit after pdu receiption.)\n");
+ fprintf(stderr, " -L <mtu>:<tx_dl>:<tx_flags> (link layer options for CAN FD)\n");
fprintf(stderr, "\nCAN IDs and addresses are given and expected in hexadecimal values.\n");
fprintf(stderr, "The pdu data is written on STDOUT in space separated ASCII hex values.\n");
fprintf(stderr, "\n");
{
int s;
struct sockaddr_can addr;
- struct ifreq ifr;
static struct can_isotp_options opts;
static struct can_isotp_fc_options fcopts;
+ static struct can_isotp_ll_options llopts;
int opt, i;
extern int optind, opterr, optopt;
__u32 force_rx_stmin = 0;
int loop = 0;
- unsigned char msg[4096];
+ unsigned char msg[BUFSIZE];
int nbytes;
addr.can_addr.tp.tx_id = addr.can_addr.tp.rx_id = NO_CAN_ID;
- while ((opt = getopt(argc, argv, "s:d:x:p:P:b:m:w:f:l?")) != -1) {
+ while ((opt = getopt(argc, argv, "s:d:x:p:P:b:m:w:f:lL:?")) != -1) {
switch (opt) {
case 's':
addr.can_addr.tp.tx_id = strtoul(optarg, (char **)NULL, 16);
break;
case 'x':
- opts.flags |= CAN_ISOTP_EXTEND_ADDR;
- opts.ext_address = strtoul(optarg, (char **)NULL, 16) & 0xFF;
+ {
+ int elements = sscanf(optarg, "%hhx:%hhx",
+ &opts.ext_address,
+ &opts.rx_ext_address);
+
+ if (elements == 1)
+ opts.flags |= CAN_ISOTP_EXTEND_ADDR;
+ else if (elements == 2)
+ opts.flags |= (CAN_ISOTP_EXTEND_ADDR | CAN_ISOTP_RX_EXT_ADDR);
+ else {
+ printf("incorrect extended addr values '%s'.\n", optarg);
+ print_usage(basename(argv[0]));
+ exit(0);
+ }
break;
+ }
case 'p':
- opts.flags |= CAN_ISOTP_RX_PADDING;
- opts.rxpad_content = strtoul(optarg, (char **)NULL, 16) & 0xFF;
+ {
+ int elements = sscanf(optarg, "%hhx:%hhx",
+ &opts.txpad_content,
+ &opts.rxpad_content);
+
+ if (elements == 1)
+ opts.flags |= CAN_ISOTP_TX_PADDING;
+ else if (elements == 2)
+ opts.flags |= (CAN_ISOTP_TX_PADDING | CAN_ISOTP_RX_PADDING);
+ else if (sscanf(optarg, ":%hhx", &opts.rxpad_content) == 1)
+ opts.flags |= CAN_ISOTP_RX_PADDING;
+ else {
+ printf("incorrect padding values '%s'.\n", optarg);
+ print_usage(basename(argv[0]));
+ exit(0);
+ }
break;
+ }
case 'P':
if (optarg[0] == 'l')
else if (optarg[0] == 'c')
opts.flags |= CAN_ISOTP_CHK_PAD_DATA;
else if (optarg[0] == 'a')
- opts.flags |= (CAN_ISOTP_CHK_PAD_DATA | CAN_ISOTP_CHK_PAD_DATA);
+ opts.flags |= (CAN_ISOTP_CHK_PAD_LEN | CAN_ISOTP_CHK_PAD_DATA);
else {
printf("unknown padding check option '%c'.\n", optarg[0]);
print_usage(basename(argv[0]));
loop = 1;
break;
+ case 'L':
+ if (sscanf(optarg, "%hhu:%hhu:%hhu",
+ &llopts.mtu,
+ &llopts.tx_dl,
+ &llopts.tx_flags) != 3) {
+ printf("unknown link layer options '%s'.\n", optarg);
+ print_usage(basename(argv[0]));
+ exit(0);
+ }
+ break;
+
case '?':
print_usage(basename(argv[0]));
exit(0);
setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_OPTS, &opts, sizeof(opts));
setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_RECV_FC, &fcopts, sizeof(fcopts));
+ if (llopts.tx_dl) {
+ if (setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_LL_OPTS, &llopts, sizeof(llopts)) < 0) {
+ perror("link layer sockopt");
+ exit(1);
+ }
+ }
+
if (opts.flags & CAN_ISOTP_FORCE_RXSTMIN)
setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_RX_STMIN, &force_rx_stmin, sizeof(force_rx_stmin));
addr.can_family = AF_CAN;
- strcpy(ifr.ifr_name, argv[optind]);
- ioctl(s, SIOCGIFINDEX, &ifr);
- addr.can_ifindex = ifr.ifr_ifindex;
+ addr.can_ifindex = if_nametoindex(argv[optind]);
if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("bind");
}
do {
- nbytes = read(s, msg, 4096);
- if (nbytes > 0 && nbytes < 4096)
+ nbytes = read(s, msg, BUFSIZE);
+ if (nbytes > 0 && nbytes < BUFSIZE)
for (i=0; i < nbytes; i++)
printf("%02X ", msg[i]);
printf("\n");
projects / can-utils.git / blobdiff