| // SPDX-License-Identifier: GPL-2.0 |
| // Verify behavior for the sequence: remote side sends FIN, then we close(). |
| // Since the remote side (client) closes first, we test our LAST_ACK code path. |
| |
| `./defaults.sh` |
| |
| // Initialize a server 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 |
| |
| +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7> |
| +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8> |
| +0 < . 1:1(0) ack 1 win 257 |
| |
| +0 accept(3, ..., ...) = 4 |
| |
| // Client closes first. |
| +.01 < F. 1:1(0) ack 1 win 257 |
| +0 > . 1:1(0) ack 2 |
| |
| // App notices that client closed. |
| +0 read(4, ..., 1000) = 0 |
| |
| // Then we close. |
| +.01 close(4) = 0 |
| +0 > F. 1:1(0) ack 2 |
| |
| // Client ACKs our FIN. |
| +.01 < . 2:2(0) ack 2 win 257 |
| |
| // Verify that we send RST in response to any incoming segments |
| // (because the kernel no longer has any record of this socket). |
| +.01 < . 2:2(0) ack 2 win 257 |
| +0 > R 2:2(0) |
