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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>
13 lines
348 B
Plaintext
13 lines
348 B
Plaintext
// Test that tcp_ecn=4 uses RFC3168 ECN for SYN
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`./defaults.sh
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sysctl -q net.ipv4.tcp_ecn=4
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`
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0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 4
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+.002 ... 0.05 connect(4, ..., ...) = 0
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+.002 > SEW 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8>
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+0.05 < S. 0:0(0) ack 1 win 32767 <mss 1460,nop,nop,sackOK,nop,wscale 8>
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+.002 > . 1:1(0) ack 1
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