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authorAlan Ott <alan@signal11.us>2013-01-16 19:09:48 +0000
committerDavid S. Miller <davem@davemloft.net>2013-01-18 14:18:30 -0500
commitee21c7e0d1f6e742e9f441f580a3bac316a39a21 (patch)
tree36baeee5552a9256ee607d35eb4e21221f537adc
parent0c446212c4f68e51ba03a9b172599437d6660a9d (diff)
6lowpan: Handle uncompressed IPv6 packets over 6LoWPAN
Handle the reception of uncompressed packets (dispatch type = IPv6). Signed-off-by: Alan Ott <alan@signal11.us> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ieee802154/6lowpan.c41
1 files changed, 32 insertions, 9 deletions
diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 1714cfab1220..09cba81d2c4a 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -1147,19 +1147,42 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
goto drop;
/* check that it's our buffer */
- switch (skb->data[0] & 0xe0) {
- case LOWPAN_DISPATCH_IPHC: /* ipv6 datagram */
- case LOWPAN_DISPATCH_FRAG1: /* first fragment header */
- case LOWPAN_DISPATCH_FRAGN: /* next fragments headers */
- local_skb = skb_clone(skb, GFP_ATOMIC);
+ if (skb->data[0] == LOWPAN_DISPATCH_IPV6) {
+ /* Copy the packet so that the IPv6 header is
+ * properly aligned.
+ */
+ local_skb = skb_copy_expand(skb, NET_SKB_PAD - 1,
+ skb_tailroom(skb), GFP_ATOMIC);
if (!local_skb)
goto drop;
- lowpan_process_data(local_skb);
+ local_skb->protocol = htons(ETH_P_IPV6);
+ local_skb->pkt_type = PACKET_HOST;
+
+ /* Pull off the 1-byte of 6lowpan header. */
+ skb_pull(local_skb, 1);
+ skb_reset_network_header(local_skb);
+ skb_set_transport_header(local_skb, sizeof(struct ipv6hdr));
+
+ lowpan_give_skb_to_devices(local_skb);
+
+ kfree_skb(local_skb);
kfree_skb(skb);
- break;
- default:
- break;
+ } else {
+ switch (skb->data[0] & 0xe0) {
+ case LOWPAN_DISPATCH_IPHC: /* ipv6 datagram */
+ case LOWPAN_DISPATCH_FRAG1: /* first fragment header */
+ case LOWPAN_DISPATCH_FRAGN: /* next fragments headers */
+ local_skb = skb_clone(skb, GFP_ATOMIC);
+ if (!local_skb)
+ goto drop;
+ lowpan_process_data(local_skb);
+
+ kfree_skb(skb);
+ break;
+ default:
+ break;
+ }
}
return NET_RX_SUCCESS;