Adding a server flag for idle connection closure

[Niennienzz]

Did you search GitHub Issues and GitHub Discussions First?

• Yes.

Is your feature request related to a problem? Please describe.

• It would be nice to automatically kill long-running idle clients.
• Users seeing some clients idle for hours and just wanting to kill them off automatically.
• Note that this is different from --tcp_keepalive.

Describe the solution you'd like.

• Adding a server flag to control this behavior. For example, Redis has the timeout config:

# Close the connection after a client is idle for N seconds (0 to disable)
timeout 0

Describe alternatives you've considered

• The --tcp_keepalive flag can be used, but it detects dead peers, instead of killing idle connections.
• That's probably why Redis supports both flags.

# If non-zero, use SO_KEEPALIVE to send TCP ACKs to clients in absence
# of communication. This is useful for two reasons:
#
# 1) Detect dead peers.
# 2) Force network equipment in the middle to consider the connection to be
#    alive.
#
# On Linux, the specified value (in seconds) is the period used to send ACKs.
# Note that to close the connection the double of the time is needed.
# On other kernels the period depends on the kernel configuration.
tcp-keepalive 300

[romange]

we do have this flag. please run ./dragonfly --help next time.

[Niennienzz]

Oh I see. I didn't find it in the documentation, that's why.

I will update.