1*f85d9c45SChia-Yu Chang// Test that tcp_ecn=4 uses RFC3168 ECN for SYN 2*f85d9c45SChia-Yu Chang 3*f85d9c45SChia-Yu Chang`./defaults.sh 4*f85d9c45SChia-Yu Changsysctl -q net.ipv4.tcp_ecn=4 5*f85d9c45SChia-Yu Chang` 6*f85d9c45SChia-Yu Chang 7*f85d9c45SChia-Yu Chang 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 4 8*f85d9c45SChia-Yu Chang+.002 ... 0.05 connect(4, ..., ...) = 0 9*f85d9c45SChia-Yu Chang 10*f85d9c45SChia-Yu Chang+.002 > SEW 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8> 11*f85d9c45SChia-Yu Chang+0.05 < S. 0:0(0) ack 1 win 32767 <mss 1460,nop,nop,sackOK,nop,wscale 8> 12*f85d9c45SChia-Yu Chang+.002 > . 1:1(0) ack 1 13