| // Test false overflow detection with option used to rule out overflow |
| |
| `./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 1460,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 |
| |
| +0.01 %{ assert tcpi_delivered_ce == 0, tcpi_delivered_ce }% |
| |
| // Stop sending option to allow easier testing |
| +0 `sysctl -q net.ipv4.tcp_ecn_option=0` |
| |
| +0.002 write(4, ..., 14600) = 14600 |
| +.002 > [ect0] P.5 1:14601(14600) ack 1 |
| |
| +0.05 < [ect0] .5 1:1(0) ack 1460 win 264 <ECN e0b 1461 ceb 0 e1b 1,nop> |
| +0.05 < [ect0] .5 1:1(0) ack 14601 win 264 <ECN e0b 14601 ceb 0 e1b 1,nop> |
| |
| +0.01 %{ |
| assert tcpi_delivered_ce == 0, tcpi_delivered_ce |
| assert tcpi_delivered_e0_bytes == 14600, tcpi_delivered_e0_bytes |
| }% |
