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authorSimon Vincent <simon.vincent@xsilon.com>2014-11-04 15:29:51 +0000
committerMarcel Holtmann <marcel@holtmann.org>2014-11-04 17:31:01 +0100
commit980edbd503dc0823c75e138edc53a48f99e1e3f6 (patch)
treef5e93b5623f6453fa4cde8e130c3c1b4a65bfeb5 /net/6lowpan
parent2a68c897246b70a0c6b51a4a7d48d19b56b3e76b (diff)
downloadlinux-980edbd503dc0823c75e138edc53a48f99e1e3f6.tar.bz2
6lowpan: fix udp header compression when using raw sockets
If you use RAW sockets the transport header offset is not set by the ipv6 stack so when we get to the udp header compression it does not compress the right part of the packet. This patch adds a check for this scenario and sets the transport header offset. Signed-off-by: Simon Vincent <simon.vincent@xsilon.com> Acked-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/6lowpan')
-rw-r--r--net/6lowpan/iphc.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/net/6lowpan/iphc.c b/net/6lowpan/iphc.c
index 73a7065f0c6b..cd5f8b8e34cd 100644
--- a/net/6lowpan/iphc.c
+++ b/net/6lowpan/iphc.c
@@ -512,9 +512,17 @@ static u8 lowpan_compress_addr_64(u8 **hc_ptr, u8 shift,
static void compress_udp_header(u8 **hc_ptr, struct sk_buff *skb)
{
- struct udphdr *uh = udp_hdr(skb);
+ struct udphdr *uh;
u8 tmp;
+ /* In the case of RAW sockets the transport header is not set by
+ * the ip6 stack so we must set it ourselves
+ */
+ if (skb->transport_header == skb->network_header)
+ skb_set_transport_header(skb, sizeof(struct ipv6hdr));
+
+ uh = udp_hdr(skb);
+
if (((ntohs(uh->source) & LOWPAN_NHC_UDP_4BIT_MASK) ==
LOWPAN_NHC_UDP_4BIT_PORT) &&
((ntohs(uh->dest) & LOWPAN_NHC_UDP_4BIT_MASK) ==