tools/testing/selftests/net/packetdrill/tcp_fastopen_server_fin-close-socket.pkt

Source file repositories/reference/linux-study-clean/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_fin-close-socket.pkt

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/net/packetdrill/tcp_fastopen_server_fin-close-socket.pkt
Extension
.pkt
Size
1026 bytes
Lines
31
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
//
// Send a FIN pkt with the ACK bit to a TFO socket.
// The socket will go to TCP_CLOSE_WAIT state and data can be
// read until the socket is closed, at which time a FIN will be sent.

`./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>

// FIN is acked and the socket goes to TCP_CLOSE_WAIT state
// in tcp_fin() called from tcp_data_queue().
   +0 < F. 11:11(0) ack 1 win 32792
   +0 > . 1:1(0) ack 12

   +0 accept(3, ..., ...) = 4
   +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) != 0, tcpi_options }%
   +0 %{ assert tcpi_state == TCP_CLOSE_WAIT, tcpi_state }%

   +0 read(4, ..., 512) = 10
   +0 close(4) = 0
   +0 > F. 1:1(0) ack 12
    * > F. 1:1(0) ack 12

Annotation

Implementation Notes