1*f85d9c45SChia-Yu Chang// Test 3rd ACK flags when SYN-ACK is rexmitted 2*f85d9c45SChia-Yu Chang 3*f85d9c45SChia-Yu Chang`./defaults.sh 4*f85d9c45SChia-Yu Changsysctl -q net.ipv4.tcp_ecn=3 5*f85d9c45SChia-Yu Chang` 6*f85d9c45SChia-Yu Chang 7*f85d9c45SChia-Yu Chang 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 4 8*f85d9c45SChia-Yu Chang+.002 ... 0.052 connect(4, ..., ...) = 0 9*f85d9c45SChia-Yu Chang 10*f85d9c45SChia-Yu Chang+.002 > SEWA 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8> 11*f85d9c45SChia-Yu Chang+0.05 < SW. 0:0(0) ack 1 win 32767 <mss 1460,ECN e0b 1 ceb 0 e1b 1,nop,nop,nop,sackOK,nop,wscale 8> 12*f85d9c45SChia-Yu Chang+.002 > [ect0] W. 1:1(0) ack 1 <ECN e1b 1 ceb 0 e0b 1,nop> 13*f85d9c45SChia-Yu Chang 14*f85d9c45SChia-Yu Chang+0.05 < SW. 0:0(0) ack 1 win 32767 <mss 1460,ECN e0b 1 ceb 0 e1b 1,nop,nop,nop,sackOK,nop,wscale 8> 15*f85d9c45SChia-Yu Chang+.002 > [ect0] W. 1:1(0) ack 1 <ECN e1b 1 ceb 0 e0b 1,nop> 16