1// Test that SYN with ACE flags got dropped 2// We retry one more time with ACE and then 3// fallback to disabled ECN 4 5`./defaults.sh 6sysctl -q net.ipv4.tcp_ecn=3 7` 8 9 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 4 10+.002 ... 2.1 connect(4, ..., ...) = 0 11 12+.002 > [noecn] SEWA 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8> 13+1~+1.1 > [noecn] SEWA 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8> 14+1~+1.1 > [noecn] S 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8> 15+0.1 < [noecn] S. 0:0(0) ack 1 win 32767 <mss 1460,nop,nop,sackOK,nop,wscale 8> 16+0~+0.01 > [noecn] . 1:1(0) ack 1 17