1// Test basic AccECN negotiation without option 2 3`./defaults.sh 4sysctl -q net.ipv4.tcp_ecn=3 5` 6 7 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 4 8+.002 ... 0.052 connect(4, ..., ...) = 0 9 10+.002 > SEWA 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8> 11+0.05 < SW. 0:0(0) ack 1 win 32767 <mss 1460,nop,nop,sackOK,nop,wscale 8> 12+.002 > [ect0] W. 1:1(0) ack 1 13 14+0.01 write(4, ..., 1000) = 1000 15+.002 > [ect0] EAP. 1:1001(1000) ack 1 16+.05 < [ect0] EAP. 1:1(0) ack 1001 win 256 17 18+0.01 %{ assert tcpi_delivered_ce == 0, tcpi_delivered_ce }% 19 20+0.01 write(4, ..., 1000) = 1000 21+.002 > [ect0] EAP. 1001:2001(1000) ack 1 22 23+0.01 %{ assert tcpi_delivered_ce == 0, tcpi_delivered_ce }% 24