#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. Use 'any' for all addresses)\n");
- fprintf(stderr, " -p <byte> (set and enable padding byte)\n");
- fprintf(stderr, " -P <mode> (check padding in FC. (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, " -t <time ns> (frame transmit time (N_As) in nanosecs)\n");
fprintf(stderr, " -f <time ns> (ignore FC and force local tx stmin value in nanosecs)\n");
+ fprintf(stderr, " -D <len> (send a fixed PDU with len bytes - no STDIN data)\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 expected on STDIN 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_ll_options llopts;
int opt;
extern int optind, opterr, optopt;
__u32 force_tx_stmin = 0;
- unsigned char buf[4096];
+ unsigned char buf[BUFSIZE];
int buflen = 0;
+ int datalen = 0;
+ int retval = 0;
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:t:f:?")) != -1) {
+ while ((opt = getopt(argc, argv, "s:d:x:p:P:t:f:D:L:?")) != -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_TX_PADDING;
- opts.txpad_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]));
force_tx_stmin = strtoul(optarg, (char **)NULL, 10);
break;
+ case 'D':
+ datalen = strtoul(optarg, (char **)NULL, 10);
+ if (!datalen || datalen >= BUFSIZE) {
+ print_usage(basename(argv[0]));
+ exit(0);
+ }
+ 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));
+ 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_TXSTMIN)
setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_TX_STMIN, &force_tx_stmin, sizeof(force_tx_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");
exit(1);
}
- while (buflen < 4096 && scanf("%hhx", &buf[buflen]) == 1)
- buflen++;
+ if (!datalen) {
+ while (buflen < BUFSIZE && scanf("%hhx", &buf[buflen]) == 1)
+ buflen++;
+ } else {
+ for (buflen = 0; buflen < datalen; buflen++)
+ buf[buflen] = ((buflen % 0xFF) + 1) & 0xFF;
+ }
+
+
+ retval = write(s, buf, buflen);
+ if (retval < 0) {
+ perror("write");
+ return retval;
+ }
- write(s, buf, buflen);
+ if (retval != buflen)
+ fprintf(stderr, "wrote only %d from %d byte\n", retval, buflen);
/*
* due to a Kernel internal wait queue the PDU is sent completely
projects / can-utils.git / blobdiff