tools/testing/selftests/net/packetdrill/tcp_fastopen_server_trigger-rst-listener-closed.pkt

Source file repositories/reference/linux-study-clean/tools/testing/selftests/net/packetdrill/tcp_fastopen_server_trigger-rst-listener-closed.pkt

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/net/packetdrill/tcp_fastopen_server_trigger-rst-listener-closed.pkt
Extension
.pkt
Size
722 bytes
Lines
22
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
//
// Close a listener socket with pending TFO child.
// This will trigger RST pkt to go out.

`./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>

// RST pkt is generated for each not-yet-accepted TFO child.
// inet_csk_listen_stop() -> inet_child_forget() -> tcp_disconnect()
// -> tcp_need_reset() is true for SYN_RECV
   +0 close(3) = 0
   +0 > R. 1:1(0) ack 11

Annotation

Implementation Notes