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|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2000-2009. 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%
%%
%%
%%----------------------------------------------------------------------
%% Purpose: Externalize/internalize Megaco/H.248 messages
%%----------------------------------------------------------------------
-module(megaco_erl_dist_encoder).
-behaviour(megaco_encoder).
-export([encode_message/3, decode_message/3,
decode_mini_message/3,
encode_transaction/3,
encode_action_requests/3,
encode_action_request/3,
encode_command_request/3,
encode_action_reply/3
]).
-export([version_of/2]).
%% Backward compatible funcs:
-export([encode_message/2, decode_message/2]).
-include("megaco_message_internal.hrl").
-define(MC_MOD, megaco_erl_dist_encoder_mc).
%%----------------------------------------------------------------------
%% Convert a 'MegacoMessage' record into a binary
%% Return {ok, DeepIoList} | {error, Reason}
%%----------------------------------------------------------------------
encode_message(Config,
#'MegacoMessage'{mess = #'Message'{version = V}} = MegaMsg) ->
encode_message(Config, V, MegaMsg).
encode_message([{version3, _}|EC], Vsn, MegaMsg) ->
encode_message(EC, Vsn, MegaMsg);
encode_message([megaco_compressed|Config], Vsn, MegaMsg)
when is_record(MegaMsg, 'MegacoMessage') ->
{ok, erlang:term_to_binary(?MC_MOD:encode(MegaMsg, Vsn), Config)};
encode_message([{megaco_compressed, Mod}|Config], Vsn, MegaMsg)
when is_atom(Mod) and is_record(MegaMsg, 'MegacoMessage') ->
{ok, erlang:term_to_binary(Mod:encode(MegaMsg, Vsn), Config)};
encode_message(Config, _Vsn, MegaMsg)
when is_record(MegaMsg, 'MegacoMessage') ->
{ok, erlang:term_to_binary(MegaMsg, Config)};
encode_message(_Config, _Vsn, _MegaMsg) ->
{error, not_a_megaco_message}.
%%----------------------------------------------------------------------
%% Convert a transaction record into a binary
%% Return {ok, Bin} | {error, Reason}
%%----------------------------------------------------------------------
encode_transaction([{version3, _}|EC], Vsn, Trans) ->
encode_transaction(EC, Vsn, Trans);
encode_transaction([megaco_compressed|Config], _Vsn, Trans) ->
{ok, erlang:term_to_binary(?MC_MOD:encode(Trans), Config)};
encode_transaction([{megaco_compressed, Mod}|Config], _Vsn, Trans) ->
{ok, erlang:term_to_binary(Mod:encode(Trans), Config)};
encode_transaction(Config, _Vsn, Trans) ->
{ok, erlang:term_to_binary(Trans, Config)}.
%%----------------------------------------------------------------------
%% Convert a list of ActionRequest record's into a binary
%% Return {ok, Binary} | {error, Reason}
%%----------------------------------------------------------------------
encode_action_requests([{version3, _}|EC], Vsn, ActReqs) ->
encode_action_requests(EC, Vsn, ActReqs);
encode_action_requests([megaco_compressed|Config], Vsn, ActReqs0)
when is_list(ActReqs0) ->
ActReqs = [?MC_MOD:encode(AR, Vsn) || AR <- ActReqs0],
{ok, erlang:term_to_binary(ActReqs, Config)};
encode_action_requests([{megaco_compressed, Mod}|Config], Vsn, ActReqs0)
when is_list(ActReqs0) ->
ActReqs = [Mod:encode(AR, Vsn) || AR <- ActReqs0],
{ok, erlang:term_to_binary(ActReqs, Config)};
encode_action_requests(Config, _Vsn, ActReqs)
when is_list(ActReqs) ->
{ok, erlang:term_to_binary(ActReqs, Config)}.
%%----------------------------------------------------------------------
%% Convert a ActionRequest record into a binary
%% Return {ok, Binary} | {error, Reason}
%%----------------------------------------------------------------------
encode_action_request([{version3, _}|EC], Vsn, ActReq) ->
encode_action_request(EC, Vsn, ActReq);
encode_action_request([megaco_compressed|Config], Vsn, ActReq)
when is_tuple(ActReq) ->
{ok, erlang:term_to_binary(?MC_MOD:encode(ActReq, Vsn), Config)};
encode_action_request([{megaco_compressed, Mod}|Config], Vsn, ActReq)
when is_tuple(ActReq) ->
{ok, erlang:term_to_binary(Mod:encode(ActReq, Vsn), Config)};
encode_action_request(Config, _Vsn, ActReq)
when is_tuple(ActReq) ->
{ok, erlang:term_to_binary(ActReq, Config)}.
%%----------------------------------------------------------------------
%% Convert a CommandRequest record into a binary
%% Return {ok, DeepIoList} | {error, Reason}
%%----------------------------------------------------------------------
encode_command_request([{version3, _}|EC], Vsn, CmdReq) ->
encode_command_request(EC, Vsn, CmdReq);
encode_command_request([megaco_compressed|Config], Vsn, CmdReq)
when is_tuple(CmdReq) ->
{ok, erlang:term_to_binary(?MC_MOD:encode(CmdReq, Vsn), Config)};
encode_command_request([{megaco_compressed, Mod}|Config], Vsn, CmdReq)
when is_tuple(CmdReq) ->
{ok, erlang:term_to_binary(Mod:encode(CmdReq, Vsn), Config)};
encode_command_request(Config, _Vsn, CmdReq)
when is_tuple(CmdReq) ->
{ok, erlang:term_to_binary(CmdReq, Config)}.
%%----------------------------------------------------------------------
%% Convert a action reply into a binary
%% Return {ok, DeepIoList} | {error, Reason}
%%----------------------------------------------------------------------
encode_action_reply([{version3, _}|EC], Vsn, ActRep) ->
encode_action_reply(EC, Vsn, ActRep);
encode_action_reply([megaco_compressed|Config], Vsn, ActRep)
when is_tuple(ActRep) ->
{ok, erlang:term_to_binary(?MC_MOD:encode(ActRep, Vsn), Config)};
encode_action_reply([{megaco_compressed, Mod}|Config], Vsn, ActRep)
when is_tuple(ActRep) ->
{ok, erlang:term_to_binary(Mod:encode(ActRep, Vsn), Config)};
encode_action_reply(Config, _Vsn, ActRep)
when is_tuple(ActRep) ->
{ok, erlang:term_to_binary(ActRep, Config)}.
%%----------------------------------------------------------------------
%% Get the megaco version of the message
%% Return {ok, Version} | {error, Reason}
%%----------------------------------------------------------------------
version_of(Config, Bin) when is_binary(Bin) ->
case decode_message(Config, 1, Bin) of
{ok, M} ->
V = (M#'MegacoMessage'.mess)#'Message'.version,
{ok, V};
Error ->
Error
end.
decode_message(Config, Bin) ->
decode_message(Config, 1, Bin).
decode_message([{version3, _}|EC], V, Bin) ->
decode_message(EC, V, Bin);
decode_message([megaco_compressed = MC|_Config], Vsn, Bin) ->
case catch erlang:binary_to_term(Bin) of
Msg when is_tuple(Msg) ->
case (?MC_MOD:decode(Msg, Vsn)) of
MegaMsg when is_record(MegaMsg, 'MegacoMessage') ->
{ok, dm(MegaMsg, MC, Vsn)};
_ ->
{error, {bad_message, Msg}}
end;
{'EXIT', _Reason} ->
{error, bad_binary}
end;
decode_message([{megaco_compressed, Mod} = MC|_Config], Vsn, Bin)
when is_atom(Mod) ->
case catch erlang:binary_to_term(Bin) of
Msg when is_tuple(Msg) ->
case (Mod:decode(Msg, Vsn)) of
MegaMsg when is_record(MegaMsg, 'MegacoMessage') ->
{ok, dm(MegaMsg, MC, Vsn)};
_ ->
{error, {bad_message, Msg}}
end;
{'EXIT', _Reason} ->
{error, bad_binary}
end;
decode_message(_Config, Vsn, Bin) ->
case catch erlang:binary_to_term(Bin) of
MegaMsg when is_record(MegaMsg, 'MegacoMessage') ->
{ok, dm(MegaMsg, undefined, Vsn)};
{'EXIT', _Reason} ->
{error, bad_binary}
end.
decode_mini_message(EC, Vsn, Bin) when is_binary(Bin) ->
decode_message(EC, Vsn, Bin).
%% This crap is because the transactions or the action-requests
%% might have been encoded separetely
dm(#'MegacoMessage'{mess = Mess} = M, MC, Vsn) ->
#'Message'{messageBody = Body} = Mess,
case Body of
{transactions, Transactions} ->
Body2 = {transactions, dmt(Transactions, [], MC, Vsn)},
Mess2 = Mess#'Message'{messageBody = Body2},
M#'MegacoMessage'{mess = Mess2};
_ ->
M
end.
dmt([], Acc, _, _Vsn) ->
lists:reverse(Acc);
dmt([Trans0|Transactions], Acc, MC, Vsn) when is_binary(Trans0) ->
Trans1 = erlang:binary_to_term(Trans0),
Trans2 = dmt1(Trans1, MC, Vsn),
dmt(Transactions, [Trans2|Acc], MC, Vsn);
dmt([{Tag, Trans0}|Transactions], Acc, MC, Vsn) when is_binary(Trans0) ->
Trans1 = erlang:binary_to_term(Trans0),
Trans2 = dmt1(Trans1, MC, Vsn),
dmt(Transactions, [{Tag, Trans2}|Acc], MC, Vsn);
dmt([{transactionRequest,
#'TransactionRequest'{actions = Acts0} = TR0}|Transactions],
Acc, MC, Vsn)
when is_binary(Acts0) ->
Acts1 = erlang:binary_to_term(Acts0),
Acts2 = dmt1(Acts1, MC, Vsn),
TR1 = TR0#'TransactionRequest'{actions = Acts2},
dmt(Transactions, [{transactionRequest, TR1}|Acc], MC, Vsn);
dmt([{transactionRequest,
#'TransactionRequest'{actions = Acts0} = TR0}|Transactions],
Acc, MC, Vsn) ->
Acts2 = [dmt2(AR, MC, Vsn) || AR <- Acts0],
TR1 = TR0#'TransactionRequest'{actions = Acts2},
dmt(Transactions, [{transactionRequest, TR1}|Acc], MC, Vsn);
dmt([Trans|Transactions], Acc, MC, Vsn) ->
dmt(Transactions, [Trans|Acc], MC, Vsn).
dmt1(L, megaco_compressed, Vsn) when is_list(L) ->
[?MC_MOD:decode(E, Vsn) || E <- L];
dmt1(L, {megaco_compressed, Mod}, Vsn) when is_list(L) ->
[Mod:decode(E, Vsn) || E <- L];
dmt1(T, megaco_compressed, Vsn) when is_tuple(T) ->
?MC_MOD:decode(T, Vsn);
dmt1(T, {megaco_compressed, Mod}, Vsn) when is_tuple(T) ->
Mod:decode(T, Vsn);
dmt1(Else, _, _Vsn) ->
Else.
dmt2(Bin, MC, Vsn) when is_binary(Bin) ->
AR = erlang:binary_to_term(Bin),
dmt1(AR, MC, Vsn);
dmt2(AR, _MC, _Vsn) ->
AR.
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