flow_dissector: Add flag to stop parsing at L3 (8306b688) · Commits · 戴 / test

Add an input flag to flow dissector on rather dissection should be stopped when an L3 packet is encountered. This would be useful if a caller just wanted to get IP addresses of the outermost header (e.g. to do an L3 hash). Signed-off-by:

Tom Herbert <tom@herbertland.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/net/flow_dissector.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -125,6 +125,7 @@ enum flow_dissector_key_id {
		};

		#define FLOW_DISSECTOR_F_PARSE_1ST_FRAG BIT(0)
		#define FLOW_DISSECTOR_F_STOP_AT_L3 BIT(1)

		struct flow_dissector_key {
		enum flow_dissector_key_id key_id;

net/core/flow_dissector.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -200,6 +200,9 @@ ip:
		}
		}

		if (flags & FLOW_DISSECTOR_F_STOP_AT_L3)
		goto out_good;

		break;
		}
		case htons(ETH_P_IPV6): {
		@@ -238,6 +241,9 @@ ipv6:
		}
		}

		if (flags & FLOW_DISSECTOR_F_STOP_AT_L3)
		goto out_good;

		break;
		}
		case htons(ETH_P_8021AD):

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