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Message-Id: <20240731172332.683815-3-tom@herbertland.com>
Date: Wed, 31 Jul 2024 10:23:22 -0700
From: Tom Herbert <tom@...bertland.com>
To: davem@...emloft.net,
kuba@...nel.org,
edumazet@...gle.com,
netdev@...r.kernel.org,
felipe@...anda.io
Cc: Tom Herbert <tom@...bertland.com>
Subject: [PATCH 02/12] flow_dissector: Parse ETH_P_TEB
ETH_P_TEB (Trans Ether Bridging) is the EtherType to carry
a plain Etherent frame. Add case in skb_flow_dissect to parse
packets of this type
Signed-off-by: Tom Herbert <tom@...bertland.com>
---
net/core/flow_dissector.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index e034e502ab49..d9abb4ae021b 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -1284,6 +1284,27 @@ bool __skb_flow_dissect(struct net *net,
break;
}
+ case htons(ETH_P_TEB): {
+ const struct ethhdr *eth;
+ struct ethhdr _eth;
+
+ eth = __skb_header_pointer(skb, nhoff, sizeof(_eth),
+ data, hlen, &_eth);
+ if (!eth)
+ goto out_bad;
+
+ proto = eth->h_proto;
+ nhoff += sizeof(*eth);
+
+ /* Cap headers that we access via pointers at the
+ * end of the Ethernet header as our maximum alignment
+ * at that point is only 2 bytes.
+ */
+ if (NET_IP_ALIGN)
+ hlen = nhoff;
+
+ goto proto_again;
+ }
case htons(ETH_P_8021AD):
case htons(ETH_P_8021Q): {
const struct vlan_hdr *vlan = NULL;
--
2.34.1
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