Fix kernel version check for TCP_FASTOPEN support

[BeardOverflow]

Identify the Bug

#346

Description of the Change

Corrected the logic used to determine whether TCP_FASTOPEN should be enabled based on the Linux kernel version.

The original version incorrectly evaluated some kernel versions and it only allowed TCP_FASTOPEN on version Kernel 3.7+, but failed to correctly handle minor version lower than 7 for major versions greater than 3.

For example, kernel versions 6.1 and 6.6 were incorrectly excluded, even though they support TCP_FASTOPEN because its minor version is lower than 7.

Alternate Designs

None.

Possible Drawbacks

None.

Verification Process

I have used github search engine and git blame.

The first commit introducing this kernel value check was authored 10 years ago: a730551
The first commit suggests Kernel 3.6 to support TCP_FASTOPEN, but a newer commit change it to 3.7: 8786b2f

No more related commits.

Release Notes

• Fixed kernel version check for TCP_FASTOPEN support