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correct ecn filter when ecn flag is set #22

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@ntcong ntcong commented Apr 12, 2020

p0f set ecn quirk in 2 scenarios: when tos_ecn is set, or tcp_ece&tcp_cwr flag is set.
Currently, bpftools only check if tos_ecn is set, which will generate the wrong filter

@ntcong ntcong changed the title corect ecn filter when ecn flag is set correct ecn filter when ecn flag is set Apr 12, 2020
p0f set ecn quirk in 2 scenarios: when tos_ecn is set, or tcp_ece&tcp_cwr flag is set.
Currently, bpftools only check if tos_ecn is set, which will generate the wrong filter
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