1*f85d9c45SChia-Yu Chang// Test that we retransmit SYN-ACK with ACE and without 2*f85d9c45SChia-Yu Chang// AccECN options after 3*f85d9c45SChia-Yu Chang// SYN-ACK was lost and TCP moved to TCPS_SYN_RECEIVED 4*f85d9c45SChia-Yu Chang 5*f85d9c45SChia-Yu Chang`./defaults.sh 6*f85d9c45SChia-Yu Changsysctl -q net.ipv4.tcp_ecn=3 7*f85d9c45SChia-Yu Changsysctl -q net.ipv4.tcp_ecn_option=2 8*f85d9c45SChia-Yu Chang` 9*f85d9c45SChia-Yu Chang 10*f85d9c45SChia-Yu Chang+0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 11*f85d9c45SChia-Yu Chang+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 12*f85d9c45SChia-Yu Chang+0 bind(3, ..., ...) = 0 13*f85d9c45SChia-Yu Chang+0 listen(3, 1) = 0 14*f85d9c45SChia-Yu Chang 15*f85d9c45SChia-Yu Chang+0 < [noecn] SEWA 0:0(0) win 32792 <mss 1460,nop,nop,sackOK,nop,wscale 8> 16*f85d9c45SChia-Yu Chang+.002 > [noecn] SW. 0:0(0) ack 1 <mss 1460,ECN e1b 1 ceb 0 e0b 1,nop,nop,nop,sackOK,nop,wscale 8> 17*f85d9c45SChia-Yu Chang 18*f85d9c45SChia-Yu Chang// Retransmit SYN-ACK without option 19*f85d9c45SChia-Yu Chang+1~+1.1 > [noecn] SW. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8> 20*f85d9c45SChia-Yu Chang+0.1 < [noecn] W. 1:1(0) ack 1 win 320 <ECN e0b 1 ceb 0 e1b 1,nop> 21*f85d9c45SChia-Yu Chang+.002 accept(3, ..., ...) = 4 22*f85d9c45SChia-Yu Chang 23*f85d9c45SChia-Yu Chang// We try to write with AccECN option 24*f85d9c45SChia-Yu Chang+0.01 write(4, ..., 100) = 100 25*f85d9c45SChia-Yu Chang+.002 > [ect0] P5. 1:101(100) ack 1 <ECN e1b 1 ceb 0 e0b 1,nop> 26