1// SPDX-License-Identifier: GPL-2.0 2 3--mss=1000 4 5`./defaults.sh 6sysctl -q net.ipv4.tcp_rmem="4096 131072 $((32*1024*1024))"` 7 8 +0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 9 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 10 +0 bind(3, ..., ...) = 0 11 +0 listen(3, 1) = 0 12 13 +0 < S 0:0(0) win 65535 <mss 1000,nop,nop,sackOK,nop,wscale 7> 14 +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 10> 15 +.1 < . 1:1(0) ack 1 win 257 16 17 +0 accept(3, ..., ...) = 4 18 19 +0 < . 2001:11001(9000) ack 1 win 257 20 +0 > . 1:1(0) ack 1 win 81 <nop,nop,sack 2001:11001> 21 22// check that ooo packet properly updates tcpi_rcv_mss 23 +0 %{ assert tcpi_rcv_mss == 1000, tcpi_rcv_mss }% 24 25 +0 < . 11001:21001(10000) ack 1 win 257 26 +0 > . 1:1(0) ack 1 win 81 <nop,nop,sack 2001:21001> 27 28