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>[:<rxaddr>] (extended addressing / opt. separate rxaddr)\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, " -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");
}
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')