static int tuntap_probe()

in platforms/iss/network.c [222:269]

• 37 lines of code
• 6 McCabe index (conditional complexity)

static int tuntap_probe(struct iss_net_private *lp, int index, char *init)
{
	struct net_device *dev = lp->dev;
	char *dev_name = NULL, *mac_str = NULL, *rem = NULL;

	/* Transport should be 'tuntap': ethX=tuntap,mac,dev_name */

	if (strncmp(init, TRANSPORT_TUNTAP_NAME,
		    sizeof(TRANSPORT_TUNTAP_NAME) - 1))
		return 0;

	init += sizeof(TRANSPORT_TUNTAP_NAME) - 1;
	if (*init == ',') {
		rem = split_if_spec(init + 1, &mac_str, &dev_name);
		if (rem != NULL) {
			pr_err("%s: extra garbage on specification : '%s'\n",
			       dev->name, rem);
			return 0;
		}
	} else if (*init != '\0') {
		pr_err("%s: invalid argument: %s. Skipping device!\n",
		       dev->name, init);
		return 0;
	}

	if (!dev_name) {
		pr_err("%s: missing tuntap device name\n", dev->name);
		return 0;
	}

	strlcpy(lp->tp.info.tuntap.dev_name, dev_name,
		sizeof(lp->tp.info.tuntap.dev_name));

	setup_etheraddr(dev, mac_str);

	lp->mtu = TRANSPORT_TUNTAP_MTU;

	lp->tp.info.tuntap.fd = -1;

	lp->tp.open = tuntap_open;
	lp->tp.close = tuntap_close;
	lp->tp.read = tuntap_read;
	lp->tp.write = tuntap_write;
	lp->tp.protocol = tuntap_protocol;
	lp->tp.poll = tuntap_poll;

	return 1;
}