- opts.flags |= CAN_ISOTP_RX_PADDING;
- opts.rxpad_content = strtoul(optarg, (char **)NULL, 16) & 0xFF;
- break;
-
- case 'q':
- 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);
+ }