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|
%%%-------------------------------------------------------------------
%%% @author Guido <agx@bogon.m.sigxcpu.org>
%%% @copyright (C) 2015, Guido Günther
%%% @doc
%%%
%%% @end
%%% Created : 2 Sep 2015 by Guido <agx@bogon.m.sigxcpu.org>
%%%-------------------------------------------------------------------
-module(simplec_vms).
-behaviour(gen_server).
-include("simplec.hrl").
%% API
-export([start_link/1]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-define(SERVER, ?MODULE).
-define(QUERY_INTERVAL, 2000).
-record(state, {url, verxref, cur}).
%%%===================================================================
%%% API
%%%===================================================================
%%--------------------------------------------------------------------
%% @doc
%% Starts the server
%%
%% @spec start_link() -> {ok, Pid} | ignore | {error, Error}
%% @end
%%--------------------------------------------------------------------
start_link(Args = {url, Url}) ->
Name = list_to_atom(lists:flatten(io_lib:format("~p_~s", [?SERVER, Url] ))),
gen_server:start_link({local, Name}, ?MODULE, Args, []).
%%%===================================================================
%%% gen_server callbacks
%%%===================================================================
%%--------------------------------------------------------------------
%% @private
%% @doc
%% Initializes the server
%%
%% @spec init(Args) -> {ok, State} |
%% {ok, State, Timeout} |
%% ignore |
%% {stop, Reason}
%% @end
%%--------------------------------------------------------------------
init({url, Url}) ->
io:format("Monitoring ~s~n~n", [Url]),
{ok, Ref} = verx_client:start(),
{ok, [1]} = verx:auth_polkit(Ref),
ok = verx:connect_open(Ref, [Url, 0]),
{ok, #state{url=Url, verxref=Ref}, ?QUERY_INTERVAL}.
%%--------------------------------------------------------------------
%% @private
%% @doc
%% Handling call messages
%%
%% @spec handle_call(Request, From, State) ->
%% {reply, Reply, State} |
%% {reply, Reply, State, Timeout} |
%% {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, Reply, State} |
%% {stop, Reason, State}
%% @end
%%--------------------------------------------------------------------
handle_call(Request, _From, State) ->
io:format("Call ~s~n~n", [Request]),
Reply = ok,
{reply, Reply, State}.
%%--------------------------------------------------------------------
%% @private
%% @doc
%% Handling cast messages
%%
%% @spec handle_cast(Msg, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% @end
%%--------------------------------------------------------------------
handle_cast(Msg, State) ->
io:format("Msg ~s~n~n", [Msg]),
{noreply, State}.
%%--------------------------------------------------------------------
%% @private
%% @doc
%% Handling all non call/cast messages
%%
%% @spec handle_info(Info, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% @end
%%--------------------------------------------------------------------
handle_info(timeout, State = #state{url=Url}) ->
{ok, Res} = get_addresses(State#state.verxref),
case Res == State#state.cur of
false -> print_addresses(Res),
simplec_hostsfile:write(Res, Url);
true -> true
end,
{noreply, State#state{cur=Res}, ?QUERY_INTERVAL};
handle_info(Info, State) ->
io:format("Info ~s~n~n", [Info]),
{noreply, State}.
%%--------------------------------------------------------------------
%% @private
%% @doc
%% This function is called by a gen_server when it is about to
%% terminate. It should be the opposite of Module:init/1 and do any
%% necessary cleaning up. When it returns, the gen_server terminates
%% with Reason. The return value is ignored.
%%
%% @spec terminate(Reason, State) -> void()
%% @end
%%--------------------------------------------------------------------
terminate(_Reason, State) ->
io:format("Terminating"),
ok = verx:connect_close(State#state.verxref),
ok = verx_client:stop(State#state.verxref),
ok.
%%--------------------------------------------------------------------
%% @private
%% @doc
%% Convert process state when code is changed
%%
%% @spec code_change(OldVsn, State, Extra) -> {ok, NewState}
%% @end
%%--------------------------------------------------------------------
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%%===================================================================
%%% Internal functions
%%%===================================================================
filter_addresses(Addrs) ->
[ begin
{_Iface, _Mac, [{_Type, Addr, _Netmask}]} = A,
Addr
end || A <- Addrs ].
addresses(Ref, Domain) ->
case verx:domain_interface_addresses(Ref, [Domain, 0, 0]) of
{ok, [Addrs]} -> Addrs;
{error, _Error} -> []
end.
domains(Ref, IDs) ->
[ begin
{ok, [Domain]} = verx:domain_lookup_by_id(Ref, [N]),
Domain
end || N <- IDs ].
print_addr({Name, Adresses}) ->
io:format("~20s: ", [Name]),
[ io:format("~s ", [A]) || A <- Adresses ],
io:format("~n").
print_addresses(Res) ->
[ print_addr(R) || R <- Res ],
io:format("~n").
get_addresses(Ref) ->
{ok, [NumRun]} = verx:connect_num_of_domains(Ref),
{ok, [Running]} = verx:connect_list_domains(Ref, [NumRun]),
Domains = domains(Ref, Running),
Res = [ begin
{Name, _, _} = D,
Addrs = addresses(Ref, D),
{Name, filter_addresses(Addrs)}
end || D <- Domains ],
{ok, Res}.
|
