We don't handle the DAC bit currently, so I add a warning and drop the
package.
Signed-off-by: Alexander Aring <alex.ar...@gmail.com>
---
net/ieee802154/6lowpan.c | 24 +++++++++++++-----------
1 file changed, 13 insertions(+), 11 deletions(-)
diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 7062dad..80f6f7b 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -967,22 +967,24 @@ lowpan_process_data(struct sk_buff *skb)
/* Extract DAM to the tmp variable */
tmp = ((iphc1 & LOWPAN_IPHC_DAM_11) >> LOWPAN_IPHC_DAM_BIT) & 0x03;
- /* check for Multicast Compression */
- if (iphc1 & LOWPAN_IPHC_M) {
- if (iphc1 & LOWPAN_IPHC_DAC) {
- pr_debug("dest: context-based mcast compression\n");
- /* TODO: implement this */
- } else {
+ if (iphc1 & LOWPAN_IPHC_DAC) {
+ /* TODO: implement this */
+ netdev_warn(skb->dev, "DAC bit is set. Context-based not
implemented. Drop packet.\n");
+ goto drop;
+ } else {
+ /* check for Multicast Compression */
+ if (iphc1 & LOWPAN_IPHC_M) {
err = lowpan_uncompress_multicast_daddr(
skb, &hdr.daddr, tmp);
if (err)
goto drop;
+ } else {
+ pr_debug("dest: stateless compression\n");
+ err = lowpan_uncompress_addr(
+ skb, &hdr.daddr, tmp, _daddr);
+ if (err)
+ goto drop;
}
- } else {
- pr_debug("dest: stateless compression\n");
- err = lowpan_uncompress_addr(skb, &hdr.daddr, tmp, _daddr);
- if (err)
- goto drop;
}
/* UDP data uncompression */
--
1.8.3.2
------------------------------------------------------------------------------
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