diff options
| author | Alexander Aring <aar@pengutronix.de> | 2016-06-15 21:20:17 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-15 20:41:22 -0700 |
| commit | 2ad3ed59198c5404c34515cfcfd9a2b3c54d964f (patch) | |
| tree | 0dd9cbc8f4787819d70afd97ff91256f70d4ccc7 /net | |
| parent | 8626a0c83b0d471d859bcd908d016874df951fc3 (diff) | |
6lowpan: add 802.15.4 short addr slaac
This patch adds the autoconfiguration if a valid 802.15.4 short address
is available for 802.15.4 6LoWPAN interfaces.
Cc: David S. Miller <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <aar@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/6lowpan/core.c | 46 | ||||
| -rw-r--r-- | net/ipv6/addrconf.c | 5 |
2 files changed, 49 insertions, 2 deletions
diff --git a/net/6lowpan/core.c b/net/6lowpan/core.c index 7a240b3eaed1..801404ceea23 100644 --- a/net/6lowpan/core.c +++ b/net/6lowpan/core.c @@ -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, diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index b12553905e42..1ce4048d1b5e 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2947,8 +2947,8 @@ static void init_loopback(struct net_device *dev) } } -static void addrconf_add_linklocal(struct inet6_dev *idev, - const struct in6_addr *addr, u32 flags) +void addrconf_add_linklocal(struct inet6_dev *idev, + const struct in6_addr *addr, u32 flags) { struct inet6_ifaddr *ifp; u32 addr_flags = flags | IFA_F_PERMANENT; @@ -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) { |