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24 lines
993 B
OCaml
24 lines
993 B
OCaml
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(* Copyright (C) 2015, Thomas Leonard <thomas.leonard@unikernel.com>
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See the README file for details. *)
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(** Put your firewall rules here. *)
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open Packet
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(* OCaml normally warns if you don't match all fields, but that's OK here. *)
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[@@@ocaml.warning "-9"]
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(** Decide what to do with a packet from a client VM.
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Note: If the packet matched an existing NAT rule then this isn't called. *)
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let from_client = function
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| { dst = `External } -> `Accept
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| { dst = `Client_gateway; proto = `UDP { dport = 53 } } -> `Redirect_to_netvm 53
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| { dst = (`Client_gateway | `Firewall_uplink) } -> `Drop "packet addressed to firewall itself"
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| { dst = `Client _ } -> `Drop "prevent communication between client VMs"
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| { dst = `Unknown_client } -> `Drop "target client not running"
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(** Decide what to do with a packet received from the outside world.
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Note: If the packet matched an existing NAT rule then this isn't called. *)
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let from_netvm = function
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| _ -> `Drop "drop by default"
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