1// 3rd ACK + 1st data segment lost, data segments with ce 2 3`./defaults.sh 4sysctl -q net.ipv4.tcp_ecn=3 5` 6 7 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 8 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 9 +0 bind(3, ..., ...) = 0 10 +0 listen(3, 1) = 0 11 12+0.05 < SEWA 0:0(0) win 32767 <mss 1460,nop,nop,sackOK,nop,wscale 8> 13+.002 > SW. 0:0(0) ack 1 <mss 1460,ECN e1b 1 ceb 0 e0b 1,nop,nop,nop,sackOK,nop,wscale 8> 14// 3rd ACK lost 15// 1st data segment lost 16+0.05 < [ce] EAP. 1001:2001(1000) ack 1 win 264 <ECN e0b 1 ceb 0 e1b 1,nop> 17+.002 > [ect0] WA. 1:1(0) ack 1 <ECN e1b 1 ceb 1000 e0b 1,nop,nop,nop,sack 1001:2001> 18+.002 accept(3, ..., ...) = 4 19 20+0.2 < [ce] EAP. 1:1001(1000) ack 1 win 264 <ECN e0b 1 ceb 0 e1b 1,nop> 21+.001 > [ect0] EWA. 1:1(0) ack 2001 <ECN e1b 1 ceb 2000 e0b 1,nop> 22 23+0.05 < [ce] EAP. 2001:3001(1000) ack 1 win 264 24+.001 > [ect0] . 1:1(0) ack 3001 <ECN e1b 1 ceb 3000 e0b 1,nop> 25