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authorAlexander Aring <aar@pengutronix.de>2016-02-24 12:01:03 +0100
committerMarcel Holtmann <marcel@holtmann.org>2016-02-24 16:14:30 +0100
commit8790404de0e5f47ef721e2ed36ebb0f2314722ac (patch)
treef5264b2901cef1b2c549d3b08a92692cc4442d3f /net/6lowpan
parentebba380cc94689e372387aa7f63c063a3663e846 (diff)
downloadlinux-stericsson-8790404de0e5f47ef721e2ed36ebb0f2314722ac.tar.gz
6lowpan: iphc: fix stateful multicast compression
In case of multicast address we need to set always the LOWPAN_IPHC_M bit and if a destination context identifier was found for a multicast address then we need to set the LOWPAN_IPHC_DAC as well. Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/6lowpan')
-rw-r--r--net/6lowpan/iphc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/6lowpan/iphc.c b/net/6lowpan/iphc.c
index d2a565cde4f4..8dd8388c8eba 100644
--- a/net/6lowpan/iphc.c
+++ b/net/6lowpan/iphc.c
@@ -1118,12 +1118,13 @@ int lowpan_header_compress(struct sk_buff *skb, const struct net_device *dev,
/* destination address compression */
if (ipv6_daddr_type & IPV6_ADDR_MULTICAST) {
pr_debug("destination address is multicast: ");
+ iphc1 |= LOWPAN_IPHC_M;
if (dci) {
iphc1 |= lowpan_iphc_mcast_ctx_addr_compress(&hc_ptr,
&dci_entry,
&hdr->daddr);
+ iphc1 |= LOWPAN_IPHC_DAC;
} else {
- iphc1 |= LOWPAN_IPHC_M;
iphc1 |= lowpan_iphc_mcast_addr_compress(&hc_ptr,
&hdr->daddr);
}