tools/testing/selftests/net/packetdrill/tcp_fastopen_server_experimental_option.pkt

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/net/packetdrill/tcp_fastopen_server_experimental_option.pkt
Extension
.pkt
Size
1249 bytes
Lines
38
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
//
// Test the Experimental Option
//
// SYN w/ FOEXP w/o cookie must generates SYN+ACK w/ FOEXP
// w/ a valid cookie, and the cookie must be the same one
// with one generated by IANA FO

`./defaults.sh`

// Request a TFO cookie by Experimental Option
// This must generate the same TFO_COOKIE
    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,FOEXP>
   +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,FOEXP TFO_COOKIE>

   +0 close(3) = 0

// Test if FOEXP with a valid cookie creates a TFO socket
    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,FOEXP TFO_COOKIE>
   +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 read(4, ..., 512) = 10

Annotation

Implementation Notes