108 lines
4.0 KiB
OCaml
108 lines
4.0 KiB
OCaml
(*****************************************************************************)
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(* *)
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(* Open Source License *)
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(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
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(* *)
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(* Permission is hereby granted, free of charge, to any person obtaining a *)
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(* copy of this software and associated documentation files (the "Software"),*)
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(* to deal in the Software without restriction, including without limitation *)
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(* the rights to use, copy, modify, merge, publish, distribute, sublicense, *)
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(* and/or sell copies of the Software, and to permit persons to whom the *)
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(* Software is furnished to do so, subject to the following conditions: *)
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(* *)
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(* The above copyright notice and this permission notice shall be included *)
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(* in all copies or substantial portions of the Software. *)
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(* *)
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(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
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(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *)
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(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *)
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(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
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(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *)
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(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *)
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(* DEALINGS IN THE SOFTWARE. *)
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(* *)
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(*****************************************************************************)
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(* logging facility to monitor sockets *)
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let is_not_windows = Sys.os_type <> "Win32"
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let () =
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(* Otherwise some writes trigger a SIGPIPE instead of raising an
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Lwt_unit exception. In the node, this is already done by
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Cohttp, so this is only useful when using the P2P layer as a
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stand alone library. *)
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if is_not_windows then
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Sys.(set_signal sigpipe Signal_ignore)
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(* Logging facility for the P2P layer *)
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module Log = Logging.Make(struct let name = "p2p.fd" end)
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type t = {
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fd : Lwt_unix.file_descr ;
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id : int ;
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mutable nread : int ;
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mutable nwrit : int ;
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}
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(* we use a prefix ' cnx:' that allows easy grepping in the log to lookup
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everything related to a particular connection. *)
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let log t fmt =
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Format.kasprintf (fun s -> Log.log_info "cnx:%d:%s" t.id s) fmt
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let create =
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let counter = ref 0 in
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function fd ->
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incr counter;
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let t = { fd ; id = !counter ; nread = 0 ; nwrit = 0 } in
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log t "create: fd %d" t.id ;
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t
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let string_of_sockaddr addr =
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match addr with
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| Lwt_unix.ADDR_INET (ip, port) ->
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Printf.sprintf "%s:%d" (Unix.string_of_inet_addr ip) port
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| Lwt_unix.ADDR_UNIX file ->
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Printf.sprintf "@%s" file
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let id t = t.id
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let socket proto kind arg =
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create (Lwt_unix.socket proto kind arg)
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let close t =
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log t "close: stats %d/%d" t.nread t.nwrit ;
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Lwt_utils_unix.safe_close t.fd
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let read t buf pos len =
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log t "try-read: %d" len;
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Lwt_bytes.read t.fd buf pos len >>= fun nread ->
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t.nread <- t.nread + nread ;
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log t "read: %d (%d)" nread t.nread ;
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Lwt.return nread
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let write t buf =
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let len = MBytes.length buf in
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log t "try-write: %d" len;
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Lwt_utils_unix.write_mbytes t.fd buf >>= fun () ->
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t.nwrit <- t.nwrit + len ;
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log t "written: %d (%d)" len t.nwrit ;
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Lwt.return ()
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let connect t saddr =
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log t "connect: %s" (string_of_sockaddr saddr);
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Lwt_unix.connect t.fd saddr
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let accept sock =
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Lwt_unix.accept sock >>= fun (fd, saddr) ->
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let t = create fd in
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log t "accept: %s" (string_of_sockaddr saddr);
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Lwt.return (t, saddr)
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module Table =
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Hashtbl.Make(struct
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type nonrec t = t
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let equal { id = x ; _ } { id = y ; _ } = x = y
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let hash { id ; _ } = Hashtbl.hash id
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end)
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