l2fwd_parse_args.h

static int
l2fwd_parse_portmask(const char *portmask)
{
	char *end = NULL;
	unsigned long pm;

	/* parse hexadecimal string */
	pm = strtoul(portmask, &end, 16);
	if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
		return -1;

	if (pm == 0)
		return -1;

	return pm;
}


static unsigned int
l2fwd_parse_nqueue(const char *q_arg)
{
	char *end = NULL;
	unsigned long n;

	/* parse hexadecimal string */
	n = strtoul(q_arg, &end, 10);
	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
		return 0;
	if (n == 0)
		return 0;
	if (n >= MAX_RX_QUEUE_PER_LCORE)
		return 0;

	return n;
}


static int
l2fwd_parse_timer_period(const char *q_arg)
{
	char *end = NULL;
	int n;

	/* parse number string */
	n = strtol(q_arg, &end, 10);
	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
		return -1;
	if (n >= MAX_TIMER_PERIOD)
		return -1;

	return n;
}


static const char short_options[] =
	"p:"  /* portmask */
	"q:"  /* number of queues */
	"T:"  /* timer period */
	;

#define CMD_LINE_OPT_MAC_UPDATING "mac-updating"
#define CMD_LINE_OPT_NO_MAC_UPDATING "no-mac-updating"

static const struct option lgopts[] = {
	{ CMD_LINE_OPT_MAC_UPDATING, no_argument, &mac_updating, 1},
	{ CMD_LINE_OPT_NO_MAC_UPDATING, no_argument, &mac_updating, 0},
	{NULL, 0, 0, 0}
};


/* Parse the argument given in the command line of the application */
static int
l2fwd_parse_args(int argc, char **argv){

  int opt, ret, timer_secs;
	char **argvopt;
	int option_index;
	char *prgname = argv[0];
  argvopt = argv;

	while ((opt = getopt_long(argc, argvopt, short_options,
				  lgopts, &option_index)) != EOF) {

		switch (opt) {
		/* portmask */
		case 'p':
			l2fwd_enabled_port_mask = l2fwd_parse_portmask(optarg);
			if (l2fwd_enabled_port_mask == 0) {
				printf("invalid portmask\n");
				return -1;
			}
			break;

		/* nqueue */
		case 'q':
			l2fwd_rx_queue_per_lcore = l2fwd_parse_nqueue(optarg);
			if (l2fwd_rx_queue_per_lcore == 0) {
				printf("invalid queue number\n");
				return -1;
			}
			break;

		/* timer period */
		case 'T':
			timer_secs = l2fwd_parse_timer_period(optarg);
			if (timer_secs < 0) {
				printf("invalid timer period\n");
				return -1;
			}
			timer_period = timer_secs;
			break;

		/* long options */
		case 0:
			break;

		default:
			return -1;
		}
	}

	if (optind >= 0)
		argv[optind-1] = prgname;

	ret = optind-1;
	optind = 1; /* reset getopt lib */
	return ret;


}