package tcpip

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OCaml TCP/IP networking stack, used in MirageOS

Install

Dune Dependency

github.com Readme Changelog ISC License Edit opam file Versions (7)

Authors

Maintainers

A

anil@recoil.org

Sources

tcpip-8.2.0.tbz

sha256=916e688aba897676c444db8129f4963ad739f8d1be631d9e009c6228b4b7d6ed

sha512=a8f5fa8f7e96758075c93211132839950477b756fba490207a7d630f2766757bbb44bbdd02e2b1f2b4a7d83d4d8b10d34cb03903bbd516e7d7c1a9a987eb1915

doc/tcpip.tcp/Tcp/Keepalive/index.html

Module `Tcp.Keepalive`Source

TCP keepalives.

A TCP implementation may send "keep-alives" (empty TCP ACKs with the sequence number set to one less than the current sequence number for the connection) in order to provoke the peer to respond with an ACK of the current sequence number. If the peer doesn't recognise the connection (e.g. because the connection state has been dropped) then it will return a RST; if the peer (or the network in-between) fails to respond to a configured number of repeated probes then the connection is assumed to be lost.

Sourcetype action = [

| `SendProbe
(*
we should send a keep-alive now
*)
| `Wait of Duration.t
(*
sleep for a given number of nanoseconds
*)
| `Close
(*
connection should be closed
*)

]

An I/O action to perform

Sourcetype state

State of a current connection

Sourceval alive : state

An alive connection

Source

val next : 
  configuration:Tcpip.Tcp.Keepalive.t ->
  ns:int64 ->
  state ->
  action * state

next ~configuration ~ns state returns the action we should take given that we last received a packet ns nanoseconds ago and the new state of the connection

Sourcemodule Make (T : Mirage_time.S) (Clock : Mirage_clock.MCLOCK) : sig ... end