2017-03-28 15:31:37 +02:00
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%%%-------------------------------------------------------------------
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%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%% Created : 28 Mar 2017 by Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2017 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License along
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%%% with this program; if not, write to the Free Software Foundation, Inc.,
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%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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%%%
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%%%-------------------------------------------------------------------
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-module(ejabberd_router_sql).
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-behaviour(ejabberd_router).
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-compile([{parse_transform, ejabberd_sql_pt}]).
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%% API
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-export([init/0, register_route/5, unregister_route/3, find_routes/1,
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2017-03-28 18:34:04 +02:00
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host_of_route/1, is_my_route/1, is_my_host/1, get_all_routes/0,
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find_routes/0]).
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2017-03-28 15:31:37 +02:00
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-include("ejabberd.hrl").
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-include("logger.hrl").
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-include("ejabberd_sql_pt.hrl").
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-include("ejabberd_router.hrl").
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%%%===================================================================
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%%% API
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%%%===================================================================
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init() ->
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Node = erlang:atom_to_binary(node(), latin1),
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?INFO_MSG("Cleaning SQL 'route' table...", []),
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case ejabberd_sql:sql_query(
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?MYNAME, ?SQL("delete from route where node=%(Node)s")) of
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{updated, _} ->
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ok;
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Err ->
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?ERROR_MSG("failed to clean 'route' table: ~p", [Err]),
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Err
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end.
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register_route(Domain, ServerHost, LocalHint, _, Pid) ->
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PidS = enc_pid(Pid),
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LocalHintS = enc_local_hint(LocalHint),
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Node = erlang:atom_to_binary(node(Pid), latin1),
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case ?SQL_UPSERT(?MYNAME, "route",
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["!domain=%(Domain)s",
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"!server_host=%(ServerHost)s",
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"!node=%(Node)s",
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"!pid=%(PidS)s",
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"local_hint=%(LocalHintS)s"]) of
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ok ->
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ok;
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Err ->
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?ERROR_MSG("failed to update 'route' table: ~p", [Err]),
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{error, Err}
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end.
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unregister_route(Domain, _, Pid) ->
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PidS = enc_pid(Pid),
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Node = erlang:atom_to_binary(node(Pid), latin1),
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ejabberd_sql:sql_query(
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?MYNAME,
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?SQL("delete from route where domain=%(Domain)s "
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"and pid=%(PidS)s and node=%(Node)s")),
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%% TODO: return meaningful error
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ok.
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find_routes(Domain) ->
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case ejabberd_sql:sql_query(
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?MYNAME,
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?SQL("select @(server_host)s, @(node)s, @(pid)s, @(local_hint)s "
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"from route where domain=%(Domain)s")) of
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{selected, Rows} ->
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lists:flatmap(
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fun(Row) ->
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row_to_route(Domain, Row)
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end, Rows);
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Err ->
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?ERROR_MSG("failed to select from 'route' table: ~p", [Err]),
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{error, Err}
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end.
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host_of_route(Domain) ->
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case ejabberd_sql:sql_query(
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?MYNAME,
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?SQL("select @(server_host)s from route where domain=%(Domain)s")) of
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{selected, [{ServerHost}|_]} ->
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{ok, ServerHost};
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{selected, []} ->
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error;
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Err ->
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?ERROR_MSG("failed to select from 'route' table: ~p", [Err]),
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error
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end.
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is_my_route(Domain) ->
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case host_of_route(Domain) of
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{ok, _} -> true;
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_ -> false
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end.
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is_my_host(Domain) ->
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{ok, Domain} == host_of_route(Domain).
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get_all_routes() ->
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case ejabberd_sql:sql_query(
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?MYNAME,
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?SQL("select @(domain)s from route where domain <> server_host")) of
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{selected, Domains} ->
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[Domain || {Domain} <- Domains];
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Err ->
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?ERROR_MSG("failed to select from 'route' table: ~p", [Err]),
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[]
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end.
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2017-03-28 18:34:04 +02:00
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find_routes() ->
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case ejabberd_sql:sql_query(
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?MYNAME,
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?SQL("select @(domain)s, @(server_host)s, @(node)s, @(pid)s, "
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"@(local_hint)s from route")) of
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{selected, Rows} ->
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lists:flatmap(
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fun({Domain, ServerHost, Node, Pid, LocalHint}) ->
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row_to_route(Domain, {ServerHost, Node, Pid, LocalHint})
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end, Rows);
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Err ->
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?ERROR_MSG("failed to select from 'route' table: ~p", [Err]),
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[]
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end.
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2017-03-28 15:31:37 +02:00
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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enc_local_hint(undefined) ->
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<<"">>;
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enc_local_hint(LocalHint) ->
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jlib:term_to_expr(LocalHint).
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dec_local_hint(<<"">>) ->
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undefined;
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dec_local_hint(S) ->
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ejabberd_sql:decode_term(S).
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-spec enc_pid(pid()) -> binary().
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enc_pid(Pid) ->
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list_to_binary(erlang:pid_to_list(Pid)).
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-spec dec_pid(binary(), binary()) -> pid().
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dec_pid(PidBin, NodeBin) ->
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PidStr = binary_to_list(PidBin),
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Pid = erlang:list_to_pid(PidStr),
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case erlang:binary_to_atom(NodeBin, latin1) of
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Node when Node == node() ->
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Pid;
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Node ->
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try set_node_id(PidStr, NodeBin)
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catch _:badarg ->
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erlang:error({node_down, Node})
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end
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end.
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-spec set_node_id(string(), binary()) -> pid().
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set_node_id(PidStr, NodeBin) ->
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ExtPidStr = erlang:pid_to_list(
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binary_to_term(
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<<131,103,100,(size(NodeBin)):16,NodeBin/binary,0:72>>)),
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[H|_] = string:tokens(ExtPidStr, "."),
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[_|T] = string:tokens(PidStr, "."),
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erlang:list_to_pid(string:join([H|T], ".")).
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row_to_route(Domain, {ServerHost, NodeS, PidS, LocalHintS} = Row) ->
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try [#route{domain = Domain,
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server_host = ServerHost,
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pid = dec_pid(PidS, NodeS),
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local_hint = dec_local_hint(LocalHintS)}]
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catch _:{node_down, _} ->
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[];
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E:R ->
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?ERROR_MSG("failed to decode row from 'route' table:~n"
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"Row = ~p~n"
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"Domain = ~s~n"
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"Reason = ~p",
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[Row, Domain, {E, {R, erlang:get_stacktrace()}}]),
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[]
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end.
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