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1// SPDX-License-Identifier: GPL-2.02// Test of slow start when application-limited: in this case,3// with IW10, if we send exactly 10 packets then cwnd should grow to 20.4 5// Set up config.6`./defaults.sh`7 8 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 39 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 010 +0 bind(3, ..., ...) = 011 +0 listen(3, 1) = 012 13 +.1 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>14 +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>15 +.1 < . 1:1(0) ack 1 win 25716 +0 accept(3, ..., ...) = 417 +0 setsockopt(4, SOL_SOCKET, SO_SNDBUF, [200000], 4) = 018 19 +0 write(4, ..., 10000) = 1000020 +0 > P. 1:10001(10000) ack 121 +0 %{ assert tcpi_snd_cwnd == 10, tcpi_snd_cwnd }%22 23+.105 < . 1:1(0) ack 2001 win 25724 +0 %{ assert tcpi_snd_cwnd == 12, tcpi_snd_cwnd }%25 26+.005 < . 1:1(0) ack 4001 win 25727 +0 %{ assert tcpi_snd_cwnd == 14, tcpi_snd_cwnd }%28 29+.005 < . 1:1(0) ack 6001 win 25730 +0 %{ assert tcpi_snd_cwnd == 16, tcpi_snd_cwnd }%31 32+.005 < . 1:1(0) ack 8001 win 25733 +0 %{ assert tcpi_snd_cwnd == 18, tcpi_snd_cwnd }%34 35+.005 < . 1:1(0) ack 10001 win 25736 +0 %{ assert tcpi_snd_cwnd == 20, tcpi_snd_cwnd }%37