Return-Path: From: Simon Vincent To: alex.aring@gmail.com Cc: linux-wpan@vger.kernel.org, linux-bluetooth@vger.kernel.org, Simon Vincent Subject: [PATCH bluetooth-next] ieee802154: 6lowpan: fix udp header compression when using raw skts Date: Tue, 4 Nov 2014 13:43:53 +0000 Message-Id: <1415108633-32358-1-git-send-email-simon.vincent@xsilon.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: 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 --- net/6lowpan/iphc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/net/6lowpan/iphc.c b/net/6lowpan/iphc.c index 73a7065..305bf2b 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) == -- 1.9.1