This patch adds dummy handlers for all known IEEE 802.15.4 dispatch
values which prints a warning that we don't support these dispatches
right now. Also we add a warning to the RX_CONTINUE case inside of
lowpan_rx_handlers_result which should now never happend.
Signed-off-by: Alexander Aring <alex.aring@xxxxxxxxx>
---
net/ieee802154/6lowpan/rx.c | 71 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
diff --git a/net/ieee802154/6lowpan/rx.c b/net/ieee802154/6lowpan/rx.c
index 62d181a..146aa14 100644
--- a/net/ieee802154/6lowpan/rx.c
+++ b/net/ieee802154/6lowpan/rx.c
@@ -37,6 +37,9 @@ lowpan_rx_handlers_result(struct sk_buff *skb, lowpan_rx_result res)
switch (res) {
/* nobody cared about this packet */
case RX_CONTINUE:
+ net_warn_ratelimited("%s: %s 0x%02x\n", skb->dev->name,
+ "received unknown dispatch",
+ *skb_network_header(skb));
case RX_DROP_UNUSABLE:
kfree_skb(skb);
case RX_DROP:
@@ -149,6 +152,70 @@ static lowpan_rx_result lowpan_rx_h_iphc(struct sk_buff *skb)
return lowpan_give_skb_to_device(skb);
}
+static inline bool lowpan_is_hc1(u8 dispatch)
+{
+ return dispatch == LOWPAN_DISPATCH_HC1;
+}
+
+static lowpan_rx_result lowpan_rx_h_hc1(struct sk_buff *skb)
+{
+ if (!lowpan_is_hc1(*skb_network_header(skb)))
+ return RX_CONTINUE;
+
+ net_warn_ratelimited("%s: %s\n", skb->dev->name,
+ "6LoWPAN HC1 not supported\n");
+
+ return RX_DROP_UNUSABLE;
+}
+
+static inline bool lowpan_is_bc0(u8 dispatch)
+{
+ return dispatch == LOWPAN_DISPATCH_BC0;
+}
+
+static lowpan_rx_result lowpan_rx_h_bc0(struct sk_buff *skb)
+{
+ if (!lowpan_is_bc0(*skb_network_header(skb)))
+ return RX_CONTINUE;
+
+ net_warn_ratelimited("%s: %s\n", skb->dev->name,
+ "6LoWPAN BC0 not supported\n");
+
+ return RX_DROP_UNUSABLE;
+}
+
+static inline bool lowpan_is_esc(u8 dispatch)
+{
+ return dispatch == LOWPAN_DISPATCH_ESC;
+}
+
+static lowpan_rx_result lowpan_rx_h_esc(struct sk_buff *skb)
+{
+ if (!lowpan_is_esc(*skb_network_header(skb)))
+ return RX_CONTINUE;
+
+ net_warn_ratelimited("%s: %s\n", skb->dev->name,
+ "6LoWPAN ESC not supported\n");
+
+ return RX_DROP_UNUSABLE;
+}
+
+static inline bool lowpan_is_mesh(u8 dispatch)
+{
+ return (dispatch & LOWPAN_DISPATCH_FIRST) == LOWPAN_DISPATCH_MESH;
+}
+
+static lowpan_rx_result lowpan_rx_h_mesh(struct sk_buff *skb)
+{
+ if (!lowpan_is_mesh(*skb_network_header(skb)))
+ return RX_CONTINUE;
+
+ net_warn_ratelimited("%s: %s\n", skb->dev->name,
+ "6LoWPAN MESH not supported\n");
+
+ return RX_DROP_UNUSABLE;
+}
+
int lowpan_invoke_rx_handlers(struct sk_buff *skb)
{
lowpan_rx_result res;
@@ -166,6 +233,10 @@ int lowpan_invoke_rx_handlers(struct sk_buff *skb)
/* likely at first */
CALL_RXH(lowpan_rx_h_iphc);
CALL_RXH(lowpan_rx_h_ipv6);
+ CALL_RXH(lowpan_rx_h_hc1);
+ CALL_RXH(lowpan_rx_h_bc0);
+ CALL_RXH(lowpan_rx_h_esc);
+ CALL_RXH(lowpan_rx_h_mesh);
rxh_next:
return lowpan_rx_handlers_result(skb, res);
--
2.5.0
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