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Commit 8790404d authored by Alexander Aring's avatar Alexander Aring Committed by Marcel Holtmann
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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: default avatarAlexander Aring <aar@pengutronix.de>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent ebba380c

net/6lowpan/iphc.c

+2 −1
Original line number Diff line number Diff line
@@ -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);

		}