39 lines
1.2 KiB
Plaintext
39 lines
1.2 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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// Test of slow start when application-limited: in this case,
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// with IW10, if we don't fully use our cwnd but instead
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// send just 9 packets, then cwnd should grow to twice that
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// value, or 18 packets.
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// Set up config.
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`./defaults.sh`
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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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+.1 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>
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+0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
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+.1 < . 1:1(0) ack 1 win 257
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+0 accept(3, ..., ...) = 4
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+0 setsockopt(4, SOL_SOCKET, SO_SNDBUF, [200000], 4) = 0
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+0 write(4, ..., 9000) = 9000
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+0 > P. 1:9001(9000) ack 1
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+0 %{ assert tcpi_snd_cwnd == 10, tcpi_snd_cwnd }%
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+.105 < . 1:1(0) ack 2001 win 257
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+0 %{ assert tcpi_snd_cwnd == 12, tcpi_snd_cwnd }%
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+.005 < . 1:1(0) ack 4001 win 257
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+0 %{ assert tcpi_snd_cwnd == 14, tcpi_snd_cwnd }%
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+.005 < . 1:1(0) ack 6001 win 257
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+0 %{ assert tcpi_snd_cwnd == 16, tcpi_snd_cwnd }%
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+.005 < . 1:1(0) ack 8001 win 257
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+0 %{ assert tcpi_snd_cwnd == 18, tcpi_snd_cwnd }%
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+.005 < . 1:1(0) ack 9001 win 257
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+0 %{ assert tcpi_snd_cwnd == 18, tcpi_snd_cwnd }%
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