6lowpan: add 802.15.4 short addr slaac (2ad3ed59) · Commits · 戴 / test

include/net/6lowpan.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -254,6 +254,12 @@ static inline bool lowpan_fetch_skb(struct sk_buff skb, void data,
		return false;
		}

		static inline bool lowpan_802154_is_valid_src_short_addr(__le16 addr)
		{
		/* First bit of addr is multicast, reserved or 802.15.4 specific */
		return !(addr & cpu_to_le16(0x8000));
		}

		static inline void lowpan_push_hc_data(u8 *hc_ptr, const void data,
		const size_t len)
		{

include/net/addrconf.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -94,6 +94,9 @@ int ipv6_rcv_saddr_equal(const struct sock sk, const struct sock sk2,
		void addrconf_join_solict(struct net_device dev, const struct in6_addr addr);
		void addrconf_leave_solict(struct inet6_dev idev, const struct in6_addr addr);

		void addrconf_add_linklocal(struct inet6_dev *idev,
		const struct in6_addr *addr, u32 flags);

		static inline int addrconf_ifid_eui48(u8 eui, struct net_device dev)
		{
		if (dev->addr_len != ETH_ALEN)

net/6lowpan/core.c

+46 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,7 @@
		#include <linux/module.h>

		#include <net/6lowpan.h>
		#include <net/addrconf.h>

		#include "6lowpan_i.h"

		@@ -72,16 +73,61 @@ void lowpan_unregister_netdev(struct net_device *dev)
		}
		EXPORT_SYMBOL(lowpan_unregister_netdev);

		static int addrconf_ifid_802154_6lowpan(u8 eui, struct net_device dev)
		{
		struct wpan_dev *wpan_dev = lowpan_802154_dev(dev)->wdev->ieee802154_ptr;

		/* Set short_addr autoconfiguration if short_addr is present only */
		if (!lowpan_802154_is_valid_src_short_addr(wpan_dev->short_addr))
		return -1;

		/* For either address format, all zero addresses MUST NOT be used */
		if (wpan_dev->pan_id == cpu_to_le16(0x0000) &&
		wpan_dev->short_addr == cpu_to_le16(0x0000))
		return -1;

		/* Alternatively, if no PAN ID is known, 16 zero bits may be used */
		if (wpan_dev->pan_id == cpu_to_le16(IEEE802154_PAN_ID_BROADCAST))
		memset(eui, 0, 2);
		else
		ieee802154_le16_to_be16(eui, &wpan_dev->pan_id);

		/* The "Universal/Local" (U/L) bit shall be set to zero */
		eui[0] &= ~2;
		eui[2] = 0;
		eui[3] = 0xFF;
		eui[4] = 0xFE;
		eui[5] = 0;
		ieee802154_le16_to_be16(&eui[6], &wpan_dev->short_addr);
		return 0;
		}

		static int lowpan_event(struct notifier_block *unused,
		unsigned long event, void *ptr)
		{
		struct net_device *dev = netdev_notifier_info_to_dev(ptr);
		struct inet6_dev *idev;
		struct in6_addr addr;
		int i;

		if (dev->type != ARPHRD_6LOWPAN)
		return NOTIFY_DONE;

		idev = __in6_dev_get(dev);
		if (!idev)
		return NOTIFY_DONE;

		switch (event) {
		case NETDEV_UP:
		case NETDEV_CHANGE:
		/* (802.15.4 6LoWPAN short address slaac handling */
		if (lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154) &&
		addrconf_ifid_802154_6lowpan(addr.s6_addr + 8, dev) == 0) {
		__ipv6_addr_set_half(&addr.s6_addr32[0],
		htonl(0xFE800000), 0);
		addrconf_add_linklocal(idev, &addr, 0);
		}
		break;
		case NETDEV_DOWN:
		for (i = 0; i < LOWPAN_IPHC_CTX_TABLE_SIZE; i++)
		clear_bit(LOWPAN_IPHC_CTX_FLAG_ACTIVE,

net/ipv6/addrconf.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -2947,7 +2947,7 @@ static void init_loopback(struct net_device *dev)
		}
		}

		static void addrconf_add_linklocal(struct inet6_dev *idev,
		void addrconf_add_linklocal(struct inet6_dev *idev,
		const struct in6_addr *addr, u32 flags)
		{
		struct inet6_ifaddr *ifp;
		@@ -2967,6 +2967,7 @@ static void addrconf_add_linklocal(struct inet6_dev *idev,
		in6_ifa_put(ifp);
		}
		}
		EXPORT_SYMBOL_GPL(addrconf_add_linklocal);

		static bool ipv6_reserved_interfaceid(struct in6_addr address)
		{

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