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bpf: Remove flowlabel optimization for identity
For IPv6 traffic, we use the flowlabel field to transfer the source security identity across nodes and avoid an ipcache lookup. This misuse of the flowlabel field can however conflict with legitimate uses such as [1]. This commit therefore removes this optimization. 1 - https://lpc.events/event/11/contributions/955/ Suggested-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Paul Chaignon <paul@cilium.io>
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