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f85d9c45f1
Linux Accurate ECN test sets using ACE counters and AccECN options to cover several scenarios: Connection teardown, different ACK conditions, counter wrapping, SACK space grabbing, fallback schemes, negotiation retransmission/reorder/loss, AccECN option drop/loss, different handshake reflectors, data with marking, and different sysctl values. The packetdrill used is commit cbe405666c9c8698ac1e72f5e8ffc551216dfa56 of repo: https://github.com/minuscat/packetdrill/tree/upstream_accecn. And corresponding patches are sent to google/packetdrill email list. Signed-off-by: Chia-Yu Chang <chia-yu.chang@nokia-bell-labs.com> Co-developed-by: Ilpo Järvinen <ij@kernel.org> Signed-off-by: Ilpo Järvinen <ij@kernel.org> Co-developed-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20260131222515.8485-16-chia-yu.chang@nokia-bell-labs.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
26 lines
767 B
Plaintext
26 lines
767 B
Plaintext
// Test a large ACK (> ACE field max)
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`./defaults.sh
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sysctl -q net.ipv4.tcp_ecn=3
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sysctl -q net.ipv4.tcp_ecn_option=0
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`
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0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
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+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
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+0 bind(3, ..., ...) = 0
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+0 listen(3, 1) = 0
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+0 < SEWA 0:0(0) win 32792 <mss 1460,nop,nop,sackOK,nop,wscale 8>
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+.002 > SW. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
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+0.05 < [ect0] W. 1:1(0) ack 1 win 264
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+.002 accept(3, ..., ...) = 4
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+0.01 %{ assert tcpi_delivered_ce == 0, tcpi_delivered_ce }%
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+0.01 write(4, ..., 14600) = 14600
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+.002 > [ect0] P.5 1:14601(14600) ack 1
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+0.05 < [ect0] .5 1:1(0) ack 1461 win 264
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+0.05 < [ect0] .5 1:1(0) ack 14601 win 264
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+0.01 %{ assert tcpi_delivered_ce == 8, tcpi_delivered_ce }%
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