tools/testing/selftests/net/packetdrill/tcp_fastopen_server_trigger-rst-reconnect.pkt

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/net/packetdrill/tcp_fastopen_server_trigger-rst-reconnect.pkt
Extension
.pkt
Size
1166 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
`./defaults.sh
 ./set_sysctls.py /proc/sys/net/ipv4/tcp_timestamps=0`

    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,nop,nop,sackOK,nop,nop,FO TFO_COOKIE>
   +0 > S. 0:0(0) ack 11 win 65535 <mss 1460,nop,nop,sackOK>

// sk->sk_state is TCP_SYN_RECV
   +0 accept(3, ..., ...) = 4
   +0 %{ assert tcpi_state == TCP_SYN_RECV, tcpi_state }%

// tcp_disconnect() sets sk->sk_state to TCP_CLOSE
   +0 connect(4, AF_UNSPEC, ...) = 0
   +0 > R. 1:1(0) ack 11 win 65535
   +0 %{ assert tcpi_state == TCP_CLOSE, tcpi_state }%

// connect() sets sk->sk_state to TCP_SYN_SENT
   +0 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0
   +0 connect(4, ..., ...) = -1 EINPROGRESS (Operation is now in progress)
   +0 > S 0:0(0) win 65535 <mss 1460,nop,nop,sackOK,nop,wscale 8>
   +0 %{ assert tcpi_state == TCP_SYN_SENT, tcpi_state }%

// tp->fastopen_rsk must be NULL
   +1 > S 0:0(0) win 65535 <mss 1460,nop,nop,sackOK,nop,wscale 8>

Annotation

Implementation Notes