| // Test SACK space grab to fit AccECN option |
| --tcp_ts_tick_usecs=1000 |
| |
| `./defaults.sh |
| sysctl -q net.ipv4.tcp_ecn=3 |
| ` |
| |
| 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 |
| +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 |
| +0 bind(3, ..., ...) = 0 |
| +0 listen(3, 1) = 0 |
| |
| +0 < SEWA 0:0(0) win 32792 <mss 1050,nop,nop,sackOK,nop,wscale 8> |
| +.002 > SW. 0:0(0) ack 1 <mss 1460,ECN e1b 1 ceb 0 e0b 1,nop,nop,nop,sackOK,nop,wscale 8> |
| +0.05 < [ect0] W. 1:1(0) ack 1 win 264 <ECN e0b 1 ceb 0 e1b 1,nop> |
| +.002 accept(3, ..., ...) = 4 |
| |
| +.01 < [ect1] EAP. 1001:2001(1000) ack 1 win 264 |
| +0.002 > [ect0] EA. 1:1(0) ack 1 <ECN e1b 1001 ceb 0 e0b 1,nop,nop,nop,sack 1001:2001> |
| +.01 < [ect0] EAP. 3001:4001(1000) ack 1 win 264 |
| +0.002 > [ect0] EA. 1:1(0) ack 1 <ECN e1b 1001 ceb 0 e0b 1001,nop,nop,nop,sack 3001:4001 1001:2001> |
| +.01 < [ce] EAP. 5001:6001(1000) ack 1 win 264 |
| +0.002 > [ect0] WA. 1:1(0) ack 1 <ECN e1b 1001 ceb 1000 e0b 1001,nop,nop,nop,sack 5001:6001 3001:4001 1001:2001> |
| // DSACK works? |
| +.01 < [ect0] EAP. 5001:6001(1000) ack 1 win 264 |
| +0.002 > [ect0] WA. 1:1(0) ack 1 <ECN e1b 1001 ceb 1000 e0b 2001,nop,nop,nop,sack 5001:6001 5001:6001 3001:4001> |
| +.01 < [ect1] EAP. 6001:7001(1000) ack 1 win 264 |
| +0.002 > [ect0] WA. 1:1(0) ack 1 <ECN e1b 2001 ceb 1000 e0b 2001,nop,nop,nop,sack 5001:7001 3001:4001 1001:2001> |
