/usr/lib/erlang/lib/kernel-5.1.1/include/dist_util.hrl is in erlang-base 1:19.2.1+dfsg-2+deb9u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1999-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%% uncomment this if tracing of handshake etc is wanted
%%-define(dist_trace, true).
%%-define(dist_debug, true).
-ifdef(dist_debug).
-define(debug(Term), erlang:display(Term)).
-else.
-define(debug(Term), ok).
-endif.
-ifdef(dist_trace).
-define(trace(Fmt,Args), io:format("~p ~p:~s",[erlang:now(),node(),lists:flatten(io_lib:format(Fmt, Args))])).
% Use the one below for config-file (early boot) connection tracing
%-define(trace(Fmt,Args), erlang:display([erlang:now(),node(),lists:flatten(io_lib:format(Fmt, Args))])).
-define(trace_factor,8).
-else.
-define(trace(Fmt,Args), ok).
-define(trace_factor,1).
-endif.
-define(shutdown(Data), dist_util:shutdown(?MODULE, ?LINE, Data)).
-define(shutdown2(Data, Reason), dist_util:shutdown(?MODULE, ?LINE, Data, Reason)).
%% Handshake state structure
-record(hs_data, {
kernel_pid, %% Pid of net_kernel
other_node, %% Name of peer
this_node, %% my nodename
socket, %% The connection "socket"
timer, %% The setup timer
%% (stream_dist_handshake:start_timer)
this_flags, %% Flags my node should use
allowed, %% Allowed nodes list
other_version, %% The other nodes distribution version
other_flags, %% The other nodes flags.
other_started, %% True if the other node initiated.
f_send, %% Fun that behaves like gen_tcp:send
f_recv, %% Fun that behaves like gen_tcp:recv
f_setopts_pre_nodeup, %% Sets "socket" options before
%% nodeup is delivered to net_kernel
f_setopts_post_nodeup, %% Sets "socket" options after
%% nodeup is delivered
f_getll, %% Get low level port or pid.
f_address, %% The address of the "socket",
%% generated from Socket,Node
%% These three are used in the tick loop,
%% so they are not fun's to avoid holding old code.
mf_tick, %% Takes the socket as parameters and
%% sends a tick, this is no fun, it
%% is a tuple {M,F}.
%% Is should place {tcp_closed, Socket}
%% in the message queue on failure.
mf_getstat, %% Returns
%% {ok, RecvCnt, SendCnt, SendPend} for
%% a given socket. This is a {M,F},
%% returning {error, Reason on failure}
request_type = normal,
%% New in kernel-5.1 (OTP 19.1):
mf_setopts, %% netkernel:setopts on active connection
mf_getopts %% netkernel:getopts on active connection
}).
%% The following should be filled in upon enter of...
%% - handshake_we_started:
%% kernel_pid, other_node, this_node, socket, timer,
%% this_flags, other_version, All fun's/mf's.
%% - handshake_other_started:
%% kernel_pid, this_node, socket, timer,
%% this_flags, allowed, All fun's/mf's.
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