This patch adds the autoconfiguration if a valid 802.15.4 short address
is available for 802.15.4 6LoWPAN interfaces.
Signed-off-by: Alexander Aring <aar@xxxxxxxxxxxxxx>
---
net/ipv6/addrconf.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 27aed1a..eb3e3fb 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3058,6 +3058,37 @@ static void ipv6_gen_mode_random_init(struct inet6_dev *idev)
s->initialized = true;
}
+#ifdef CONFIG_IEEE802154_6LOWPAN
+static int addrconf_ifid_ieee802154(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 (!ieee802154_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;
+}
+#endif
+
static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
{
struct in6_addr addr;
@@ -3088,6 +3119,15 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route)
addrconf_add_linklocal(idev, &addr, 0);
else if (prefix_route)
addrconf_prefix_route(&addr, 64, idev->dev, 0, 0);
+
+#ifdef CONFIG_IEEE802154_6LOWPAN
+ /* 802.15.4 6LoWPAN short address slaac handling */
+ if (lowpan_is_ll(idev->dev, LOWPAN_LLTYPE_IEEE802154)) {
+ if (addrconf_ifid_ieee802154(addr.s6_addr + 8,
+ idev->dev) == 0)
+ addrconf_add_linklocal(idev, &addr, 0);
+ }
+#endif
break;
case IN6_ADDR_GEN_MODE_NONE:
default:
--
2.7.4
--
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