| // SPDX-License-Identifier: GPL-2.0 |
| // |
| // Send a RST to a fully established socket with pending data before |
| // it is accepted. |
| // |
| // The socket with pending data won't go away and can still be accepted |
| // with data read. But it will be in TCP_CLOSE state. |
| |
| `./defaults.sh` |
| |
| 0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 |
| +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 |
| +0 bind(3, ..., ...) = 0 |
| +0 listen(3, 1) = 0 |
| +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0 |
| |
| // Invalid cookie, so accept() fails. |
| +0 < S 0:10(10) win 32792 <mss 1460,sackOK,nop,nop,FO aaaaaaaaaaaaaaaa,nop,nop> |
| +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK, FO TFO_COOKIE,nop,nop> |
| |
| +0 accept(3, ..., ...) = -1 EAGAIN (Resource temporarily unavailable) |
| |
| // Complete 3WHS and send data and RST |
| +0 < . 1:1(0) ack 1 win 32792 |
| +0 < . 1:11(10) ack 1 win 32792 |
| +0 < R. 11:11(0) win 32792 |
| |
| // A valid reset won't make the fully-established socket go away. |
| // It's just that the acceptor will get a dead, unusable socket |
| // in TCP_CLOSE state. |
| +0 accept(3, ..., ...) = 4 |
| +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) == 0, tcpi_options }% |
| +0 %{ assert tcpi_state == TCP_CLOSE, tcpi_state }% |
| |
| +0 write(4, ..., 100) = -1 ECONNRESET(Connection reset by peer) |
| +0 read(4, ..., 512) = 10 |
| +0 read(4, ..., 512) = 0 |
