| // SPDX-License-Identifier: GPL-2.0 |
| // Verify that established connections drop a segment without the ACK flag set. |
| |
| `./defaults.sh` |
| |
| // Create a socket. |
| 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 |
| |
| // Establish a connection. |
| +0 < S 0:0(0) win 20000 <mss 1000,sackOK,nop,nop> |
| +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK> |
| +.01 < . 1:1(0) ack 1 win 20000 |
| +0 accept(3, ..., ...) = 4 |
| |
| // Receive a segment with no flags set, verify that it's not enqueued. |
| +.01 < - 1:1001(1000) win 20000 |
| +0 ioctl(4, SIOCINQ, [0]) = 0 |
| |
| // Receive a segment with ACK flag set, verify that it is enqueued. |
| +.01 < . 1:1001(1000) ack 1 win 20000 |
| +0 ioctl(4, SIOCINQ, [1000]) = 0 |
