| // SPDX-License-Identifier: GPL-2.0 |
| // |
| // Send a RST to a TFO socket after it has been accepted. |
| // |
| // First read() will return all the data and this is consistent |
| // with the non-TFO case. Second read will return -1 |
| |
| `./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 |
| |
| +0 < S 0:10(10) win 32792 <mss 1460,sackOK,nop,nop,FO TFO_COOKIE,nop,nop> |
| +0 > S. 0:0(0) ack 11 <mss 1460,nop,nop,sackOK> |
| |
| +0 accept(3, ..., ...) = 4 |
| +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) != 0, tcpi_options }% |
| +0 %{ assert tcpi_state == TCP_SYN_RECV, tcpi_state }% |
| |
| // 1st read will return the data from SYN. |
| // tcp_reset() sets sk->sk_err to ECONNRESET for SYN_RECV. |
| +0 < R. 11:11(0) win 32792 |
| +0 %{ assert tcpi_state == TCP_CLOSE, tcpi_state }% |
| |
| // This one w/o ACK bit will cause the same effect. |
| // +0 < R 11:11(0) win 32792 |
| // See Step 2 in tcp_validate_incoming(). |
| |
| // found_ok_skb in tcp_recvmsg_locked() |
| +0 read(4, ..., 512) = 10 |
| |
| // !copied && sk->sk_err -> sock_error(sk) |
| +0 read(4, ..., 512) = -1 ECONNRESET (Connection reset by peer) |
| +0 close(4) = 0 |
