In socket_util.h, if the value of TCP_KEEPINTVL exceeds maxKeepIntvlSecs, it should be capped at maxKeepIntvlSecs. The same logic applies to TCP_KEEPIDLE.

However, in reality, optVal is always set to 1, and rawOptVal is never assigned to optVal, which results in the socket option not being updated as expected.

A correct implementation might be:

And I've already verified the fix using the strace tool.

Before the fix:

After the fix:

If my analysis is correct, I'd be happy to fix the issue!!