char *endptr = NULL, *token = NULL;

		if (!optarg) {
			msg_gerr("Error: No wp-range values provided\n");
			return -1;
		}

		token = strtok(optarg, ",");
		if (!token) {
			msg_gerr("Error: Invalid wp-range argument format\n");
			return -1;
		}
		*start = strtoul(token, &endptr, 0);

		token = strtok(NULL, ",");
		if (!token) {
			msg_gerr("Error: Invalid wp-range argument format\n");
			return -1;
		}
		*len = strtoul(token, &endptr, 0);

		return 0;