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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>
24 lines
801 B
Plaintext
24 lines
801 B
Plaintext
// Test basic AccECN negotiation
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`./defaults.sh
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sysctl -q net.ipv4.tcp_ecn=3
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`
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0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 4
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+.002 ... 0.052 connect(4, ..., ...) = 0
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+.002 > SEWA 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8>
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+0.05 < SW. 0:0(0) ack 1 win 32767 <mss 1460,ECN e0b 1 ceb 0 e1b 1,nop,nop,nop,sackOK,nop,wscale 8>
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+.002 > [ect0] W. 1:1(0) ack 1 <ECN e1b 1 ceb 0 e0b 1,nop>
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+0.01 write(4, ..., 1000) = 1000
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+.002 > [ect0] EAP. 1:1001(1000) ack 1 <ECN e1b 1 ceb 0 e0b 1,nop>
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+.05 < [ect0] EAP. 1:1(0) ack 1001 win 256 <ECN e0b 1001 ceb 0 e1b 0,nop>
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+0.01 %{ assert tcpi_delivered_ce == 0, tcpi_delivered_ce }%
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+0.01 write(4, ..., 1000) = 1000
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+.002 > [ect0] EAP. 1001:2001(1000) ack 1 <ECN e1b 1 ceb 0 e0b 1,nop>
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+0.01 %{ assert tcpi_delivered_ce == 0, tcpi_delivered_ce }%
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