netdev - [PATCH net-next v4 08/13] flow_dissector: Parse ESP, L2TP, and SCTP in UDP

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Message-Id: <20240823201557.1794985-9-tom@herbertland.com>
Date: Fri, 23 Aug 2024 13:15:52 -0700
From: Tom Herbert <tom@...bertland.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	edumazet@...gle.com,
	netdev@...r.kernel.org,
	felipe@...anda.io,
	willemdebruijn.kernel@...il.com,
	pablo@...filter.org,
	laforge@...monks.org,
	xeb@...l.ru
Cc: Tom Herbert <tom@...bertland.com>
Subject: [PATCH net-next v4 08/13] flow_dissector: Parse ESP, L2TP, and SCTP in UDP

These don't have an encapsulation header so it's fairly easy to
support them

Signed-off-by: Tom Herbert <tom@...bertland.com>
---
 net/core/flow_dissector.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index e8760c1182b1..dd126e72f880 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -965,10 +965,23 @@ __skb_flow_dissect_udp(const struct sk_buff *skb, const struct net *net,
 	ret = FLOW_DISSECT_RET_OUT_GOOD;
 
 	switch (encap_type) {
+	case UDP_ENCAP_ESPINUDP_NON_IKE:
+	case UDP_ENCAP_ESPINUDP:
+		*p_ip_proto = IPPROTO_ESP;
+		ret = FLOW_DISSECT_RET_IPPROTO_AGAIN;
+		break;
+	case UDP_ENCAP_L2TPINUDP:
+		*p_ip_proto = IPPROTO_L2TP;
+		ret = FLOW_DISSECT_RET_IPPROTO_AGAIN;
+		break;
 	case UDP_ENCAP_FOU:
 		*p_ip_proto = fou_protocol;
 		ret = FLOW_DISSECT_RET_IPPROTO_AGAIN;
 		break;
+	case UDP_ENCAP_SCTP:
+		*p_ip_proto = IPPROTO_SCTP;
+		ret = FLOW_DISSECT_RET_IPPROTO_AGAIN;
+		break;
 	case UDP_ENCAP_VXLAN:
 	case UDP_ENCAP_VXLAN_GPE:
 		ret = __skb_flow_dissect_vxlan(skb, flow_dissector,
-- 
2.34.1