%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
%%
%%----------------------------------------------------------------------
%% Purpose: Send and process a (sequence of) Megaco/H.248 transactions
%%----------------------------------------------------------------------
-module(megaco_messenger).
%% Application internal export
-export([
process_received_message/4, process_received_message/5,
receive_message/4, receive_message/5,
connect/4, connect/5,
disconnect/2,
encode_actions/3,
call/3,
cast/3,
cancel/2,
request_timeout/2,
request_keep_alive_timeout/2,
pending_timeout/3,
reply_timeout/3,
segment_timeout/3,
%% segment_reply_timeout/4,
test_request/5,
test_reply/5
]).
%% MIB stat functions
-export([
get_stats/0, get_stats/1, get_stats/2,
reset_stats/0, reset_stats/1
]).
%% Misc functions
-export([
cleanup/2,
which_requests/1, which_replies/1
]).
%% Module internal export
-export([
process_received_message/6,
handle_request/2,
handle_long_request/2,
connect_remote/3,
disconnect_local/2,
disconnect_remote/3,
send_request_remote/4,
receive_reply_remote/2, receive_reply_remote/3
]).
-include_lib("megaco/include/megaco.hrl").
-include("megaco_message_internal.hrl").
-include_lib("megaco/src/app/megaco_internal.hrl").
%% N.B. Update cancel/1 with '_' when a new field is added
-record(request,
{trans_id,
remote_mid,
timer_ref, % {short, Ref} | {long, Ref}
init_timer,
init_long_timer,
curr_timer,
version,
bytes, % {send, Data} | {no_send, Data}, Data = binary() | tuple()
send_handle,
user_mod,
user_args,
reply_action, % call | cast
reply_data,
seg_recv = [], % [integer()] (received segments)
init_seg_timer,
seg_timer_ref,
keep_alive_timer, % plain | integer() >= 0
keep_alive_ref % undefined | ref()
}).
%% N.B. Update cancel/1 with '_' when a new field is added
-record(reply,
{
trans_id,
local_mid,
state = prepare, % prepare | eval_request | waiting_for_ack | aborted
pending_timer_ref,
handler = undefined, % pid of the proc executing the callback func
timer_ref,
version,
%% bytes: Sent reply data: not acknowledged
bytes, % binary() | [{integer(), binary(), timer_ref()}]
ack_action, % discard_ack | {handle_ack, Data}
send_handle,
%% segments: Not sent reply data (segments)
segments = [], % [{integer(), binary()}]
user_mod,
user_args
}).
-record(trans_id,
{
mid,
serial
}).
-ifdef(MEGACO_TEST_CODE).
-define(SIM(Other,Where),
fun(Afun,Bfun) ->
Kfun = {?MODULE,Bfun},
case (catch ets:lookup(megaco_test_data, Kfun)) of
[{Kfun,Cfun}] ->
Cfun(Afun);
_ ->
Afun
end
end(Other,Where)).
-define(TC_AWAIT_CANCEL_EVENT(),
case megaco_tc_controller:lookup(block_on_cancel) of
{value, {Tag, Pid}} when is_pid(Pid) ->
Pid ! {Tag, self()},
receive
{Tag, Pid} ->
ok
end;
{value, {sleep, To}} when is_integer(To) andalso (To > 0) ->
receive after To -> ok end;
_ ->
ok
end).
-define(TC_AWAIT_REPLY_EVENT(Info),
case megaco_tc_controller:lookup(block_on_reply) of
{value, {Tag, Pid}} when is_pid(Pid) ->
Pid ! {Tag, self(), Info},
receive
{Tag, Pid} ->
ok
end;
_Whatever ->
%% io:format("Whatever: ~p~n", [Whatever]),
ok
end).
-else.
-define(SIM(Other,Where),Other).
-define(TC_AWAIT_CANCEL_EVENT(),ok).
-define(TC_AWAIT_REPLY_EVENT(_),ok).
-endif.
-define(report_pending_limit_exceeded(ConnData),
?report_important(ConnData, "<ERROR> pending limit exceeded", [])).
-ifdef(megaco_extended_trace).
-define(rt1(T,F,A),?report_trace(T,F,A)).
-define(rt2(F,A), ?rt1(ignore,F,A)).
-define(rt3(F), ?rt2(F,[])).
-else.
-define(rt1(T,F,A),ok).
-define(rt2(F,A), ok).
-define(rt3(F), ok).
-endif.
%%----------------------------------------------------------------------
%% SNMP statistics handling functions
%%----------------------------------------------------------------------
%%-----------------------------------------------------------------
%% Func: get_stats/0, get_stats/1, get_stats/2
%% Description: Retreive statistics (counters) for TCP
%%-----------------------------------------------------------------
get_stats() ->
megaco_stats:get_stats(megaco_stats).
get_stats(ConnHandleOrCounter) ->
megaco_stats:get_stats(megaco_stats, ConnHandleOrCounter).
get_stats(ConnHandle, Counter) ->
megaco_stats:get_stats(megaco_stats, ConnHandle, Counter).
%%-----------------------------------------------------------------
%% Func: reset_stats/0, reaet_stats/1
%% Description: Reset statistics (counters)
%%-----------------------------------------------------------------
reset_stats() ->
megaco_stats:reset_stats(megaco_stats).
reset_stats(ConnHandleOrCounter) ->
megaco_stats:reset_stats(megaco_stats, ConnHandleOrCounter).
%%----------------------------------------------------------------------
%% cleanup utility functions
%%----------------------------------------------------------------------
cleanup(#megaco_conn_handle{local_mid = LocalMid}, Force)
when (Force =:= true) orelse (Force =:= false) ->
Pat = #reply{trans_id = '$1',
local_mid = LocalMid,
state = '$2',
_ = '_'},
do_cleanup(Pat, Force);
cleanup(LocalMid, Force)
when (Force =:= true) orelse (Force =:= false) ->
Pat = #reply{trans_id = '$1',
local_mid = LocalMid,
state = '$2',
_ = '_'},
do_cleanup(Pat, Force).
do_cleanup(Pat, Force) ->
Match = megaco_monitor:which_replies(Pat),
Reps = [{V1, V2} || [V1, V2] <- Match],
do_cleanup2(Reps, Force).
do_cleanup2([], _) ->
ok;
do_cleanup2([{TransId, aborted}|T], Force = false) ->
megaco_monitor:delete_reply(TransId),
do_cleanup2(T, Force);
do_cleanup2([_|T], Force = false) ->
do_cleanup2(T, Force);
do_cleanup2([{TransId, _State}|T], Force = true) ->
megaco_monitor:delete_reply(TransId),
do_cleanup2(T, Force).
%%----------------------------------------------------------------------
%% which_requests and which_replies utility functions
%%----------------------------------------------------------------------
which_requests(#megaco_conn_handle{local_mid = LocalMid,
remote_mid = RemoteMid}) ->
Pat1 = #trans_id{mid = LocalMid,
serial = '$1', _ = '_'},
Pat2 = #request{trans_id = Pat1,
remote_mid = RemoteMid,
_ = '_'},
Match = megaco_monitor:which_requests(Pat2),
[S || [S] <- Match];
which_requests(LocalMid) ->
Pat1 = #trans_id{mid = LocalMid,
serial = '$1', _ = '_'},
Pat2 = #request{trans_id = Pat1,
remote_mid = '$2', _ = '_'},
Match0 = megaco_monitor:which_requests(Pat2),
Match1 = [{mk_ch(LocalMid, V2), V1} || [V1, V2] <- Match0],
which_requests1(lists:sort(Match1)).
which_requests1([]) ->
[];
which_requests1([{CH, S}|T]) ->
which_requests2(T, CH, [S], []).
which_requests2([], CH, Serials, Reqs) ->
lists:reverse([{CH, Serials}|Reqs]);
which_requests2([{CH, S}|T], CH, Serials, Reqs) ->
which_requests2(T, CH, [S|Serials], Reqs);
which_requests2([{CH1, S}|T], CH2, Serials, Reqs) ->
which_requests2(T, CH1, [S], [{CH2, lists:reverse(Serials)}| Reqs]).
which_replies(#megaco_conn_handle{local_mid = LocalMid,
remote_mid = RemoteMid}) ->
Pat1 = #trans_id{mid = RemoteMid,
serial = '$1', _ = '_'},
Pat2 = #reply{trans_id = Pat1,
local_mid = LocalMid,
state = '$2',
handler = '$3', _ = '_'},
Match = megaco_monitor:which_replies(Pat2),
[{V1, V2, V3} || [V1, V2, V3] <- Match];
which_replies(LocalMid) ->
Pat1 = #trans_id{mid = '$1',
serial = '$2', _ = '_'},
Pat2 = #reply{trans_id = Pat1,
local_mid = LocalMid,
state = '$3',
handler = '$4', _ = '_'},
Match0 = megaco_monitor:which_replies(Pat2),
Match1 = [{mk_ch(LocalMid,V1),{V2,V3,V4}} || [V1, V2, V3, V4] <- Match0],
which_replies1(lists:sort(Match1)).
which_replies1([]) ->
[];
which_replies1([{CH, Data}|T]) ->
which_replies2(T, CH, [Data], []).
which_replies2([], CH, Data, Reps) ->
lists:reverse([{CH, Data}|Reps]);
which_replies2([{CH, Data}|T], CH, Datas, Reps) ->
which_replies2(T, CH, [Data|Datas], Reps);
which_replies2([{CH1, Data}|T], CH2, Datas, Reps) ->
which_replies2(T, CH1, [Data], [{CH2, lists:reverse(Datas)}| Reps]).
mk_ch(LM, RM) ->
#megaco_conn_handle{local_mid = LM, remote_mid = RM}.
%%----------------------------------------------------------------------
%% Register/unreister connections
%%----------------------------------------------------------------------
%% Returns {ok, ConnHandle} | {error, Reason}
autoconnect(RH, RemoteMid, SendHandle, ControlPid, Extra)
when is_record(RH, megaco_receive_handle) ->
?rt2("autoconnect", [RH, RemoteMid, SendHandle, ControlPid]),
case megaco_config:autoconnect(RH, RemoteMid, SendHandle, ControlPid) of
{ok, ConnData} ->
do_connect(ConnData, Extra);
{error, Reason} ->
{error, Reason}
end;
autoconnect(BadHandle, _CH, _SendHandle, _ControlPid, _Extra) ->
{error, {bad_receive_handle, BadHandle}}.
connect(RH, RemoteMid, SendHandle, ControlPid) ->
Extra = ?default_user_callback_extra,
connect(RH, RemoteMid, SendHandle, ControlPid, Extra).
connect(RH, RemoteMid, SendHandle, ControlPid, Extra)
when is_record(RH, megaco_receive_handle) ->
?rt2("connect", [RH, RemoteMid, SendHandle, ControlPid, Extra]),
%% The purpose of this is to have a temoporary process, to
%% which one can set up a monitor or link and get a
%% notification when process exits. The entire connect is
%% done in the temporary worker process.
%% When it exits, the connect is either successfully done
%% or it failed.
ConnectorFun =
fun() ->
ConnectResult =
case megaco_config:connect(RH, RemoteMid,
SendHandle, ControlPid) of
{ok, ConnData} ->
do_connect(ConnData, Extra);
{error, Reason} ->
{error, Reason}
end,
?rt2("connector: connected", [self(), ConnectResult]),
exit({result, ConnectResult})
end,
Flag = process_flag(trap_exit, true),
Connector = erlang:spawn_link(ConnectorFun),
receive
{'EXIT', Connector, {result, ConnectResult}} ->
?rt2("connect result: received expected connector exit signal",
[Connector, ConnectResult]),
process_flag(trap_exit, Flag),
ConnectResult;
{'EXIT', Connector, OtherReason} ->
?rt2("connect exit: received unexpected connector exit signal",
[Connector, OtherReason]),
process_flag(trap_exit, Flag),
{error, OtherReason}
end;
connect(BadHandle, _CH, _SendHandle, _ControlPid, _Extra) ->
{error, {bad_receive_handle, BadHandle}}.
do_connect(CD, Extra) ->
CH = CD#conn_data.conn_handle,
Version = CD#conn_data.protocol_version,
UserMod = CD#conn_data.user_mod,
UserArgs = CD#conn_data.user_args,
Args =
case Extra of
?default_user_callback_extra ->
[CH, Version | UserArgs];
_ ->
[CH, Version, Extra | UserArgs]
end,
?report_trace(CD, "callback: connect", [Args]),
Res = (catch apply(UserMod, handle_connect, Args)),
?report_debug(CD, "return: connect", [{return, Res}]),
case Res of
ok ->
?SIM(ok, do_connect), % do_encode),
monitor_process(CH, CD#conn_data.control_pid);
error ->
megaco_config:disconnect(CH),
{error, {connection_refused, CD, error}};
{error, ED} when is_record(ED,'ErrorDescriptor') ->
megaco_config:disconnect(CH),
{error, {connection_refused, CD, ED}};
_Error ->
warning_msg("connect callback failed: ~w", [Res]),
megaco_config:disconnect(CH),
{error, {connection_refused, CD, Res}}
end.
finish_connect(#conn_data{control_pid = ControlPid} = CD)
when is_pid(ControlPid) andalso (node(ControlPid) =:= node()) ->
?rt1(CD, "finish local connect", [ControlPid]),
do_finish_connect(CD);
finish_connect(#conn_data{conn_handle = CH,
control_pid = ControlPid} = CD)
when is_pid(ControlPid) andalso (node(ControlPid) =/= node()) ->
?rt1(CD, "finish remote connect", [ControlPid]),
RemoteNode = node(ControlPid),
UserMonitorPid = whereis(megaco_monitor),
Args = [CH, ControlPid, UserMonitorPid],
case rpc:call(RemoteNode, ?MODULE, connect_remote, Args) of
{ok, ControlMonitorPid} ->
do_finish_connect(CD#conn_data{control_pid = ControlMonitorPid});
{error, Reason} ->
disconnect(CH, {connect_remote, Reason}),
{error, Reason};
{badrpc, Reason} ->
Reason2 = {'EXIT', Reason},
disconnect(CH, {connect_remote, Reason2}),
{error, Reason2}
end.
do_finish_connect(#conn_data{conn_handle = CH,
send_handle = SendHandle,
control_pid = ControlPid} = CD) ->
M = ?MODULE,
F = disconnect_local,
A = [CH],
MFA = {M, F, A},
case megaco_config:finish_connect(CH, SendHandle, ControlPid, MFA) of
{ok, Ref} ->
{ok, CD#conn_data{monitor_ref = Ref}};
{error, Reason} ->
{error, {config_update, Reason}}
end.
monitor_process(CH, ControlPid)
when is_pid(ControlPid) andalso (node(ControlPid) =:= node()) ->
M = ?MODULE,
F = disconnect_local,
A = [CH],
Ref = megaco_monitor:apply_at_exit(M, F, A, ControlPid),
case megaco_config:update_conn_info(CH, monitor_ref, Ref) of
ok ->
?SIM({ok, CH}, monitor_process_local);
{error, Reason} ->
disconnect(CH, {config_update, Reason}),
{error, Reason}
end;
monitor_process(CH, ControlPid)
when is_pid(ControlPid) andalso (node(ControlPid) =/= node()) ->
RemoteNode = node(ControlPid),
UserMonitorPid = whereis(megaco_monitor),
Args = [CH, ControlPid, UserMonitorPid],
case rpc:call(RemoteNode, ?MODULE, connect_remote, Args) of
{ok, ControlMonitorPid} ->
M = ?MODULE,
F = disconnect_local,
A = [CH],
Ref = megaco_monitor:apply_at_exit(M, F, A, ControlMonitorPid),
case megaco_config:update_conn_info(CH, monitor_ref, Ref) of
ok ->
?SIM({ok, CH}, monitor_process_remote);
{error, Reason} ->
disconnect(CH, {config_update, Reason}),
{error, Reason}
end;
{error, Reason} ->
disconnect(CH, {connect_remote, Reason}),
{error, Reason};
{badrpc, Reason} ->
Reason2 = {'EXIT', Reason},
disconnect(CH, {connect_remote, Reason2}),
{error, Reason2}
end;
monitor_process(CH, undefined = _ControlPid) ->
%% We have to do this later (setting up the monitor),
%% when the first message arrives. The 'connected' atom is
%% the indication for the first arriving message to finish
%% the connect.
%% This may be the case when an MGC performs a pre-connect
%% in order to speed up the handling of an (expected) connecting
%% MG.
case megaco_config:update_conn_info(CH, monitor_ref, connected) of
ok ->
?SIM({ok, CH}, monitor_process_local);
{error, Reason} ->
disconnect(CH, {config_update, Reason}),
{error, Reason}
end.
connect_remote(CH, ControlPid, UserMonitorPid)
when node(ControlPid) =:= node() andalso node(UserMonitorPid) =/= node() ->
case megaco_config:lookup_local_conn(CH) of
[_ConnData] ->
UserNode = node(UserMonitorPid),
M = ?MODULE,
F = disconnect_remote,
A = [CH, UserNode],
Ref = megaco_monitor:apply_at_exit(M, F, A, UserMonitorPid),
case megaco_config:connect_remote(CH, UserNode, Ref) of
ok ->
ControlMonitorPid = whereis(megaco_monitor),
?SIM({ok, ControlMonitorPid}, connect_remote);
{error, Reason} ->
{error, Reason}
end;
[] ->
{error, {no_connection, CH}}
end.
cancel_apply_at_exit({connecting, _ConnectorPid}) ->
ok;
cancel_apply_at_exit(connected) ->
ok;
cancel_apply_at_exit(ControlRef) ->
megaco_monitor:cancel_apply_at_exit(ControlRef).
node_of_control_pid(Pid) when is_pid(Pid) ->
node(Pid);
node_of_control_pid(_) ->
node().
disconnect(ConnHandle, DiscoReason)
when is_record(ConnHandle, megaco_conn_handle) ->
case megaco_config:disconnect(ConnHandle) of
{ok, ConnData, RemoteConnData} ->
ControlRef = ConnData#conn_data.monitor_ref,
cancel_apply_at_exit(ControlRef),
handle_disconnect_callback(ConnData, DiscoReason),
ControlNode = node_of_control_pid(ConnData#conn_data.control_pid),
case ControlNode =:= node() of
true ->
%% Propagate to remote users
CancelFun =
fun(RCD) ->
UserRef = RCD#remote_conn_data.monitor_ref,
cancel_apply_at_exit(UserRef),
RCD#remote_conn_data.user_node
end,
Nodes = lists:map(CancelFun, RemoteConnData),
%% io:format("NODES: ~p~n", [Nodes]),
M = ?MODULE,
F = disconnect,
A = [ConnHandle, DiscoReason],
case rpc:multicall(Nodes, M, F, A) of
{Res, []} ->
Check = fun(ok) -> false;
({error, {no_connection, _CH}}) -> false;
(_) -> true
end,
case lists:filter(Check, Res) of
[] ->
ok;
Bad ->
{error, {remote_disconnect_error, ConnHandle, Bad}}
end;
{_Res, Bad} ->
{error, {remote_disconnect_crash, ConnHandle, Bad}}
end;
false when (RemoteConnData =:= []) ->
%% Propagate to remote control node
M = ?MODULE,
F = disconnect_remote,
A = [DiscoReason, ConnHandle, node()],
case rpc:call(ControlNode, M, F, A) of
{badrpc, Reason} ->
{error, {'EXIT', Reason}};
Other ->
Other
end
end;
{error, Reason} ->
{error, Reason}
end;
disconnect(BadHandle, Reason) ->
{error, {bad_conn_handle, BadHandle, Reason}}.
disconnect_local(Reason, ConnHandle) ->
disconnect(ConnHandle, {no_controlling_process, Reason}).
disconnect_remote(_Reason, ConnHandle, UserNode) ->
case megaco_config:disconnect_remote(ConnHandle, UserNode) of
[RCD] ->
Ref = RCD#remote_conn_data.monitor_ref,
cancel_apply_at_exit(Ref),
ok;
[] ->
{error, {no_connection, ConnHandle}}
end.
%%----------------------------------------------------------------------
%% Handle incoming message
%%----------------------------------------------------------------------
receive_message(ReceiveHandle, ControlPid, SendHandle, Bin) ->
Extra = ?default_user_callback_extra,
receive_message(ReceiveHandle, ControlPid, SendHandle, Bin, Extra).
receive_message(ReceiveHandle, ControlPid, SendHandle, Bin, Extra) ->
Opts = [link , {min_heap_size, 5000}],
spawn_opt(?MODULE,
process_received_message,
[ReceiveHandle, ControlPid, SendHandle, Bin, self(), Extra], Opts),
ok.
%% This function is called via the spawn_opt function with the link
%% option, therefor the unlink before the exit.
process_received_message(ReceiveHandle, ControlPid, SendHandle, Bin, Receiver,
Extra) ->
process_received_message(ReceiveHandle, ControlPid, SendHandle, Bin, Extra),
unlink(Receiver),
exit(normal).
process_received_message(ReceiveHandle, ControlPid, SendHandle, Bin) ->
Extra = ?default_user_callback_extra,
process_received_message(ReceiveHandle, ControlPid, SendHandle, Bin, Extra).
process_received_message(ReceiveHandle, ControlPid, SendHandle, Bin, Extra) ->
Flag = process_flag(trap_exit, true),
case prepare_message(ReceiveHandle, SendHandle, Bin, ControlPid, Extra) of
{ok, ConnData, MegaMsg} when is_record(MegaMsg, 'MegacoMessage') ->
?rt1(ConnData, "message prepared", [MegaMsg]),
Mess = MegaMsg#'MegacoMessage'.mess,
case Mess#'Message'.messageBody of
{transactions, Transactions} ->
{AckList, ReqList} =
prepare_trans(ConnData, Transactions, [], [], Extra),
handle_acks(AckList, Extra),
case ReqList of
[] ->
?rt3("no transaction requests"),
ignore;
[Req|Reqs] when (ConnData#conn_data.threaded =:= true) ->
?rt3("handle requests (spawned)"),
lists:foreach(
fun(R) ->
spawn(?MODULE, handle_request, [R, Extra])
end,
Reqs),
handle_request(Req, Extra);
_ ->
?rt3("handle requests"),
case handle_requests(ReqList, [], Extra) of
[] ->
ignore;
[LongRequest | More] ->
lists:foreach(
fun(LR) ->
spawn(?MODULE, handle_long_request, [LR, Extra])
end,
More),
handle_long_request(LongRequest, Extra)
end
end;
{messageError, Error} ->
handle_message_error(ConnData, Error, Extra)
end;
{silent_fail, ConnData, {_Code, Reason, Error}} ->
?report_debug(ConnData, Reason, [no_reply, Error]),
ignore;
{verbose_fail, ConnData, {Code, Reason, Error}} ->
?report_debug(ConnData, Reason, [Error]),
send_message_error(ConnData, Code, Reason)
end,
process_flag(trap_exit, Flag),
ok.
prepare_message(RH, SH, Bin, Pid, Extra)
when is_record(RH, megaco_receive_handle) andalso is_pid(Pid) ->
?report_trace(RH, "receive bytes", [{bytes, Bin}]),
EncodingMod = RH#megaco_receive_handle.encoding_mod,
EncodingConfig = RH#megaco_receive_handle.encoding_config,
ProtVersion = RH#megaco_receive_handle.protocol_version,
case (catch EncodingMod:decode_message(EncodingConfig, ProtVersion, Bin)) of
{ok, MegaMsg} when is_record(MegaMsg, 'MegacoMessage') ->
?report_trace(RH, "receive message", [{message, MegaMsg}]),
Mess = MegaMsg#'MegacoMessage'.mess,
RemoteMid = Mess#'Message'.mId,
Version = Mess#'Message'.version,
LocalMid = RH#megaco_receive_handle.local_mid,
CH = #megaco_conn_handle{local_mid = LocalMid,
remote_mid = RemoteMid},
case megaco_config:lookup_local_conn(CH) of
%%
%% Message is not of the negotiated version
%%
[#conn_data{protocol_version = NegVersion,
strict_version = true} = ConnData]
when NegVersion =/= Version ->
%% Use already established connection,
%% but incorrect version
?rt1(ConnData, "not negotiated version", [Version]),
Error = {error, {not_negotiated_version,
NegVersion, Version}},
handle_syntax_error_callback(RH, ConnData,
prepare_error(Error),
Extra);
[ConnData] ->
%%
%% Use an already established connection
%%
%% This *may* have been set up in the
%% "non-official" way, so we may need to
%% create the monitor to the control process
%% and store the SendHandle (which is normally
%% done when creating the "temporary" connection).
%%
?rt1(ConnData, "use already established connection", []),
ConnData2 = ConnData#conn_data{send_handle = SH,
control_pid = Pid,
protocol_version = Version},
check_message_auth(CH, ConnData2, MegaMsg, Bin);
[] ->
%% Setup a temporary connection
?rt3("setup a temporary connection"),
case autoconnect(RH, RemoteMid, SH, Pid, Extra) of
{ok, _} ->
do_prepare_message(RH, CH, SH, MegaMsg, Pid, Bin);
{error, {already_connected, _ConnHandle}} ->
do_prepare_message(RH, CH, SH, MegaMsg, Pid, Bin);
{error, {connection_refused, ConnData, Reason}} ->
Error = prepare_error({error, {connection_refused, Reason}}),
{verbose_fail, ConnData, Error};
{error, Reason} ->
ConnData = fake_conn_data(RH, RemoteMid, SH, Pid),
ConnData2 = ConnData#conn_data{protocol_version = Version},
Error = prepare_error({error, Reason}),
{verbose_fail, ConnData2, Error}
end
end;
Error ->
?rt2("decode error", [Error]),
ConnData = handle_decode_error(Error,
RH, SH, Bin, Pid,
EncodingMod,
EncodingConfig,
ProtVersion),
handle_syntax_error_callback(RH, ConnData, prepare_error(Error), Extra)
end;
prepare_message(RH, SendHandle, _Bin, ControlPid, _Extra) ->
ConnData = fake_conn_data(RH, SendHandle, ControlPid),
Error = prepare_error({'EXIT', {bad_receive_handle, RH}}),
{verbose_fail, ConnData, Error}.
handle_decode_error({error, {unsupported_version, _}},
#megaco_receive_handle{local_mid = LocalMid} = RH, SH,
Bin, Pid,
EM, EC, V) ->
case (catch EM:decode_mini_message(EC, V, Bin)) of
{ok, #'MegacoMessage'{mess = #'Message'{version = _Ver,
mId = RemoteMid}}} ->
?rt2("erroneous message received", [SH, RemoteMid, _Ver]),
CH = #megaco_conn_handle{local_mid = LocalMid,
remote_mid = RemoteMid},
incNumErrors(CH),
%% We cannot put the version into conn-data, that will
%% make the resulting error message impossible to sent
%% (unsupported version)
case megaco_config:lookup_local_conn(CH) of
[ConnData] ->
?rt3("known to us"),
ConnData#conn_data{send_handle = SH};
[] ->
?rt3("unknown to us"),
ConnData = fake_conn_data(RH, SH, Pid),
ConnData#conn_data{conn_handle = CH}
end;
_ ->
?rt2("erroneous message received", [SH]),
incNumErrors(),
fake_conn_data(RH, SH, Pid)
end;
handle_decode_error(_,
#megaco_receive_handle{local_mid = LocalMid} = RH, SH,
Bin, Pid,
EM, EC, V) ->
case (catch EM:decode_mini_message(EC, V, Bin)) of
{ok, #'MegacoMessage'{mess = #'Message'{version = Ver,
mId = RemoteMid}}} ->
?rt2("erroneous message received", [SH, Ver, RemoteMid]),
CH = #megaco_conn_handle{local_mid = LocalMid,
remote_mid = RemoteMid},
incNumErrors(CH),
case megaco_config:lookup_local_conn(CH) of
[ConnData] ->
?rt3("known to us"),
ConnData#conn_data{send_handle = SH,
protocol_version = Ver};
[] ->
?rt3("unknown to us"),
ConnData = fake_conn_data(RH, SH, Pid),
ConnData#conn_data{conn_handle = CH,
protocol_version = Ver}
end;
_ ->
?rt2("erroneous message received", [SH]),
incNumErrors(),
fake_conn_data(RH, SH, Pid)
end.
do_prepare_message(RH, CH, SendHandle, MegaMsg, ControlPid, Bin) ->
case megaco_config:lookup_local_conn(CH) of
[ConnData] ->
case check_message_auth(CH, ConnData, MegaMsg, Bin) of
{ok, ConnData2, MegaMsg} ->
%% Let the connection be permanent
{ok, ConnData2, MegaMsg};
{ReplyTag, ConnData, Reason} ->
%% Remove the temporary connection
disconnect(CH, {bad_auth, Reason}),
{ReplyTag, ConnData, Reason}
end;
[] ->
Reason = no_connection,
disconnect(CH, Reason),
RemoteMid = CH#megaco_conn_handle.remote_mid,
ConnData = fake_conn_data(RH, RemoteMid, SendHandle, ControlPid),
Error = prepare_error({error, Reason}),
{silent_fail, ConnData, Error}
end.
check_message_auth(_ConnHandle, ConnData, MegaMsg, Bin) ->
MsgAuth = MegaMsg#'MegacoMessage'.authHeader,
Mess = MegaMsg#'MegacoMessage'.mess,
Version = Mess#'Message'.version,
ConnData2 = ConnData#conn_data{protocol_version = Version},
ConnAuth = ConnData2#conn_data.auth_data,
?report_trace(ConnData2, "check message auth", [{bytes, Bin}]),
if
(MsgAuth =:= asn1_NOVALUE) andalso (ConnAuth =:= asn1_NOVALUE) ->
?SIM({ok, ConnData2, MegaMsg}, check_message_auth);
true ->
ED = #'ErrorDescriptor'{errorCode = ?megaco_unauthorized,
errorText = "Autentication is not supported"},
{verbose_fail, ConnData2, prepare_error({error, ED})}
end.
handle_syntax_error_callback(ReceiveHandle, ConnData, PrepError, Extra) ->
{Code, Reason, Error} = PrepError,
ErrorDesc = #'ErrorDescriptor'{errorCode = Code, errorText = Reason},
Version =
case Error of
{error, {unsupported_version, UV}} ->
UV;
_ ->
ConnData#conn_data.protocol_version
end,
UserMod = ConnData#conn_data.user_mod,
UserArgs = ConnData#conn_data.user_args,
?report_trace(ReceiveHandle, "callback: syntax error", [ErrorDesc, Error]),
Args =
case Extra of
?default_user_callback_extra ->
[ReceiveHandle, Version, ErrorDesc | UserArgs];
_ ->
[ReceiveHandle, Version, ErrorDesc, Extra | UserArgs]
end,
Res = (catch apply(UserMod, handle_syntax_error, Args)),
?report_debug(ReceiveHandle, "return: syntax error",
[{return, Res}, ErrorDesc, Error]),
case Res of
reply ->
{verbose_fail, ConnData, PrepError};
{reply,#'ErrorDescriptor'{errorCode = Code1, errorText = Reason1}} ->
{verbose_fail, ConnData, {Code1,Reason1,Error}};
no_reply ->
{silent_fail, ConnData, PrepError};
{no_reply,#'ErrorDescriptor'{errorCode=Code2,errorText=Reason2}} ->
{silent_fail, ConnData, {Code2,Reason2,Error}}; %%% OTP-????
_ ->
warning_msg("syntax error callback failed: ~w", [Res]),
{verbose_fail, ConnData, PrepError}
end.
fake_conn_data(CH) when is_record(CH, megaco_conn_handle) ->
case (catch megaco_config:conn_info(CH, receive_handle)) of
RH when is_record(RH, megaco_receive_handle) ->
RemoteMid = CH#megaco_conn_handle.remote_mid,
ConnData =
fake_conn_data(RH, RemoteMid, no_send_handle, no_control_pid),
ConnData#conn_data{conn_handle = CH};
{'EXIT', _} ->
UserMid = CH#megaco_conn_handle.local_mid,
case catch megaco_config:user_info(UserMid, receive_handle) of
{'EXIT', _} -> % No such user
#conn_data{conn_handle = CH,
serial = undefined_serial,
control_pid = no_control_pid,
monitor_ref = undefined_monitor_ref,
send_mod = no_send_mod,
send_handle = no_send_handle,
encoding_mod = no_encoding_mod,
encoding_config = no_encoding_config,
reply_action = undefined,
sent_pending_limit = infinity,
recv_pending_limit = infinity};
RH ->
ConnData =
fake_conn_data(RH, no_send_handle, no_control_pid),
ConnData#conn_data{conn_handle = CH}
end
end.
fake_conn_data(RH, SendHandle, ControlPid) ->
fake_conn_data(RH, unknown_remote_mid, SendHandle, ControlPid).
fake_conn_data(RH, RemoteMid, SendHandle, ControlPid) ->
case catch megaco_config:init_conn_data(RH, RemoteMid, SendHandle, ControlPid) of
{'EXIT', _} -> % No such user
fake_user_data(RH, RemoteMid, SendHandle, ControlPid);
ConnData ->
ConnData
end.
fake_user_data(RH, RemoteMid, SendHandle, ControlPid) ->
LocalMid = RH#megaco_receive_handle.local_mid,
RH2 = RH#megaco_receive_handle{local_mid = default},
case catch megaco_config:init_conn_data(RH2, RemoteMid, SendHandle, ControlPid) of
{'EXIT', _} -> % Application stopped?
ConnHandle = #megaco_conn_handle{local_mid = LocalMid,
remote_mid = RemoteMid},
EncodingMod = RH#megaco_receive_handle.encoding_mod,
EncodingConfig = RH#megaco_receive_handle.encoding_config,
SendMod = RH#megaco_receive_handle.send_mod,
#conn_data{conn_handle = ConnHandle,
serial = undefined_serial,
control_pid = ControlPid,
monitor_ref = undefined_monitor_ref,
send_mod = SendMod,
send_handle = SendHandle,
encoding_mod = EncodingMod,
encoding_config = EncodingConfig,
reply_action = undefined,
sent_pending_limit = infinity,
recv_pending_limit = infinity};
ConnData ->
ConnData
end.
prepare_error(Error) ->
case Error of
{error, ED} when is_record(ED, 'ErrorDescriptor') ->
Code = ED#'ErrorDescriptor'.errorCode,
Reason = ED#'ErrorDescriptor'.errorText,
{Code, Reason, Error};
{error, [{reason, {bad_token, [BadToken, _Acc]}, Line}]} when is_integer(Line) ->
Reason =
lists:flatten(
io_lib:format("Illegal token (~p) on line ~w", [BadToken, Line])),
Code = ?megaco_bad_request,
{Code, Reason, Error};
{error, [{reason, {bad_token, _}, Line}]} when is_integer(Line) ->
Reason = lists:concat(["Illegal token on line ", Line]),
Code = ?megaco_bad_request,
{Code, Reason, Error};
{error, [{reason, {Line, _ParserMod, RawReasonString}} | _]} when is_integer(Line) andalso is_list(RawReasonString) ->
Reason =
case RawReasonString of
[[$s, $y, $n, $t, $a, $x | _], TokenString] ->
lists:flatten(
io_lib:format("Syntax error on line ~w before token ~s", [Line, TokenString]));
_ ->
lists:flatten(io_lib:format("Syntax error on line ~w", [Line]))
end,
Code = ?megaco_bad_request,
{Code, Reason, Error};
{error, [{reason, {Line, _, _}} | _]} when is_integer(Line) ->
Reason = lists:concat(["Syntax error on line ", Line]),
Code = ?megaco_bad_request,
{Code, Reason, Error};
{error, {connection_refused, ED}} when is_record(ED,'ErrorDescriptor') ->
Code = ED#'ErrorDescriptor'.errorCode,
Reason = ED#'ErrorDescriptor'.errorText,
{Code, Reason, Error};
{error, {connection_refused, _}} ->
Reason = "Connection refused by user",
Code = ?megaco_unauthorized,
{Code, Reason, Error};
{error, {unsupported_version, V}} ->
Reason =
lists:flatten(io_lib:format("Unsupported version: ~w",[V])),
Code = ?megaco_version_not_supported,
{Code, Reason, Error};
{error, {not_negotiated_version, NegV, MsgV}} ->
Reason =
lists:flatten(
io_lib:format("Not negotiated version: ~w [negotiated ~w]",
[MsgV, NegV])),
Code = ?megaco_version_not_supported,
{Code, Reason, Error};
{error, _} ->
Reason = "Syntax error",
Code = ?megaco_bad_request,
{Code, Reason, Error};
{ok, MegaMsg} when is_record(MegaMsg, 'MegacoMessage') ->
Reason = "MID does not match config",
Code = ?megaco_incorrect_identifier,
{Code, Reason, Error};
_ ->
Reason = "Fatal syntax error",
Code = ?megaco_internal_gateway_error,
{Code, Reason, Error}
end.
prepare_trans(_ConnData, [], AckList, ReqList, _Extra) ->
?SIM({AckList, ReqList}, prepare_trans_done);
prepare_trans(ConnData, Trans, AckList, ReqList, Extra)
when ConnData#conn_data.monitor_ref =:= undefined_auto_monitor_ref ->
?rt3("prepare_trans - autoconnect"),
%% <BUGBUG>
%% Do we need something here, if we send more then one
%% trans per message?
%% </BUGBUG>
%% May occur if another process has already setup a
%% temporary connection, but the handle_connect callback
%% function has not yet returned before the eager MG
%% re-sends its initial service change message.
prepare_autoconnecting_trans(ConnData, Trans, AckList, ReqList, Extra);
prepare_trans(#conn_data{monitor_ref = connected} = ConnData,
Trans, AckList, ReqList, Extra) ->
?rt3("prepare_trans - connected"),
%%
%% This will happen when the "MGC" user performs a "pre" connect,
%% instead of waiting for the auto-connect (which normally
%% happen when the MGC receives the first message from the
%% MG).
%%
%%
%% The monitor_ref will have this value when the pre-connect
%% is complete, so we finish it here and then continue with the
%% normal transaction prepare.
%%
case finish_connect(ConnData) of
{ok, CD} ->
prepare_normal_trans(CD, Trans, AckList, ReqList, Extra);
{error, Reason} ->
disconnect(ConnData#conn_data.conn_handle, Reason),
{[], []}
end;
prepare_trans(#conn_data{monitor_ref = {connecting, _}} = _ConnData,
_Trans, _AckList, _ReqList, _Extra) ->
?rt3("prepare_trans - connecting"),
%%
%% This will happen when the "MGC" user performs a "pre" connect,
%% instead of waiting for the auto-connect (which normally
%% happen when the MGC receives the first message from the
%% MG).
%%
%%
%% The monitor_ref will have this value when the pre-connect
%% is in progress. We drop (ignore) this message and hope the
%% other side (MG) will resend.
%%
%% prepare_connecting_trans(ConnData, Trans, AckList, ReqList, Extra);
{[], []};
prepare_trans(ConnData, Trans, AckList, ReqList, Extra) ->
?rt3("prepare_trans - normal"),
%% Handle transaction in the normal case
prepare_normal_trans(ConnData, Trans, AckList, ReqList, Extra).
prepare_autoconnecting_trans(_ConnData, [], AckList, ReqList, _Extra) ->
?SIM({AckList, ReqList}, prepare_autoconnecting_trans_done);
prepare_autoconnecting_trans(ConnData, [Trans | Rest], AckList, ReqList, Extra) ->
?rt1(ConnData, "[autoconnecting] prepare trans", [Trans]),
case Trans of
{transactionRequest, T} when is_record(T, 'TransactionRequest') ->
Serial = T#'TransactionRequest'.transactionId,
ConnData2 = ConnData#conn_data{serial = Serial},
?report_trace(ConnData2, "Pending handle_connect", [T]),
%% ------------------------------------------
%%
%% Check pending limit
%%
%% ------------------------------------------
Limit = ConnData#conn_data.sent_pending_limit,
TransId = to_remote_trans_id(ConnData2),
case check_and_maybe_incr_pending_limit(Limit, sent, TransId) of
ok ->
send_pending(ConnData2);
error ->
%% Pending limit:
%% In this (granted, highly hypothetical case)
%% we would make the user very confused if we
%% called the abort callback function, since
%% the request callback function has not yet
%% been called. Alas, we skip this call here.
send_pending_limit_error(ConnData);
aborted ->
ignore
end,
prepare_autoconnecting_trans(ConnData2, Rest, AckList, ReqList,
Extra);
_ ->
prepare_autoconnecting_trans(ConnData, Rest, AckList, ReqList,
Extra)
end.
%% =================================================================
%%
%% Note that the TransactionReply record was changed i v3 (two
%% new fields where added), and since we don't know which version,
%% we cannot use the record definition of TransactionReply.
%% Instead we transform the record into our own internal format
%% #megaco_transaction_reply{}
%%
%% =================================================================
prepare_normal_trans(_ConnData, [], AckList, ReqList, _Extra) ->
?SIM({AckList, ReqList}, prepare_normal_trans_done);
prepare_normal_trans(ConnData, [Trans | Rest], AckList, ReqList, Extra) ->
?rt1(ConnData, "prepare [normal] trans", [Trans]),
case Trans of
{transactionRequest, #'TransactionRequest'{transactionId = asn1_NOVALUE}} ->
ConnData2 = ConnData#conn_data{serial = 0},
Code = ?megaco_bad_request,
Reason = "Syntax error in message: transaction id missing",
send_trans_error(ConnData2, Code, Reason),
prepare_normal_trans(ConnData2, Rest, AckList, ReqList, Extra);
{transactionRequest, T} when is_record(T, 'TransactionRequest') ->
Serial = T#'TransactionRequest'.transactionId,
ConnData2 = ConnData#conn_data{serial = Serial},
prepare_request(ConnData2, T, Rest, AckList, ReqList, Extra);
{transactionPending, T} when is_record(T, 'TransactionPending') ->
Serial = T#'TransactionPending'.transactionId,
ConnData2 = ConnData#conn_data{serial = Serial},
handle_pending(ConnData2, T, Extra),
prepare_normal_trans(ConnData2, Rest, AckList, ReqList, Extra);
{transactionReply, T} when is_tuple(T) andalso
(element(1, T) == 'TransactionReply') ->
T2 = transform_transaction_reply_dec(T),
Serial = T2#megaco_transaction_reply.transactionId,
ConnData2 = ConnData#conn_data{serial = Serial},
handle_reply(ConnData2, T2, Extra),
prepare_normal_trans(ConnData2, Rest, AckList, ReqList, Extra);
{transactionResponseAck, List} when is_list(List) ->
prepare_ack(ConnData, List, Rest, AckList, ReqList, Extra);
{segmentReply, SR} when is_record(SR, 'SegmentReply') ->
handle_segment_reply(ConnData, SR, Extra),
prepare_normal_trans(ConnData, Rest, AckList, ReqList, Extra)
end.
prepare_request(ConnData, T, Rest, AckList, ReqList, Extra) ->
?rt2("prepare request", [T]),
ConnHandle = ConnData#conn_data.conn_handle,
LocalMid = ConnHandle#megaco_conn_handle.local_mid,
TransId = to_remote_trans_id(ConnData),
?rt2("prepare request", [LocalMid, TransId]),
case lookup_reply(ConnData, TransId) of
[] ->
?rt3("brand new request"),
%% Brand new request
%% Check pending limit:
%%
%% We should actually check the pending limit here
%% but since we have to do it later in the
%% handle_request function (just before we call
%% the handle_trans_request callback function) we
%% can just as well wait (this is after all a very
%% unlikely case: see function prepare_trans when
%% monitor_ref == undefined_auto_monitor_ref).
%%
#conn_data{send_handle = SendHandle,
pending_timer = InitTimer,
protocol_version = Version,
user_mod = UserMod,
user_args = UserArgs} = ConnData,
{WaitFor, CurrTimer} = megaco_timer:init(InitTimer),
M = ?MODULE,
F = pending_timeout,
A = [ConnHandle, TransId, CurrTimer],
PendingRef = megaco_monitor:apply_after(M, F, A, WaitFor),
Rep = #reply{send_handle = SendHandle,
trans_id = TransId,
local_mid = LocalMid,
pending_timer_ref = PendingRef,
handler = self(),
version = Version,
user_mod = UserMod,
user_args = UserArgs},
case megaco_monitor:insert_reply_new(Rep) of
true ->
prepare_normal_trans(ConnData, Rest, AckList,
[{ConnData, TransId, T} | ReqList],
Extra);
false ->
%% Oups - someone got there before we did...
?report_debug(ConnData,
"prepare request: conflicting requests",
[TransId]),
send_pending(ConnData),
megaco_monitor:cancel_apply_after(PendingRef),
prepare_normal_trans(ConnData, Rest, AckList, ReqList,
Extra)
end;
%% We can ignore the Converted value here as we *know*
%% conn-data to be correct (not faked), so even if
%% the record was converted, it will now have correct
%% values for user_mod and user_args.
{_Converted,
#reply{state = State,
handler = Pid,
pending_timer_ref = Ref} = Rep}
when (State =:= prepare) orelse (State =:= eval_request) ->
?rt2("request resend", [State, Pid, Ref]),
%% Pending limit:
%% We are still preparing/evaluating the request
%% Check if the pending limit has been exceeded...
%% If the pending limit is _not_ exceeded then
%% we shall send a pending (and actually restart
%% the pending timer, but that we cannot do).
%% Don't care about Msg and Rep version diff
#conn_data{sent_pending_limit = Limit} = ConnData,
case check_and_maybe_incr_pending_limit(Limit, sent, TransId) of
ok ->
%% ------------------------------------------
%%
%% Pending limit not exceeded
%%
%% 1) Increment number of pendings sent
%% (done in the check function above)
%% 2) Send pending message
%% (We should really restart the pending
%% timer, but we have no way of doing that).
%%
%% ------------------------------------------
send_pending(ConnData),
prepare_normal_trans(ConnData, Rest, AckList, ReqList,
Extra);
error ->
%% -------------------------------------------
%%
%% Pending limit exceeded
%%
%% 1) Cancel pending timer
%% 2) Send 506 error message to other side
%% 3) Inform user (depends on state)
%% 4) Set reply in aborted state
%%
%% -------------------------------------------
%%
%% State == eval_request:
%% This means that the request is currently beeing
%% evaluated by the user, and the reply timer has
%% not yet been started.
%% Either:
%% a) The "other side" will resend (which will
%% trigger a pending message send) until we pass the
%% pending limit
%% b) We will send pending messages (when the pending
%% timer expire) until we pass the pending limit.
%% In any event, we cannot delete the reply record
%% or the pending counter in this case. Is there
%% a risk we accumulate aborted reply records?
%%
%% State == prepare:
%% The user does not know about this request
%% so we can safely perform cleanup.
%%
megaco_monitor:cancel_apply_after(Ref),
send_pending_limit_error(ConnData),
if
State == eval_request ->
%%
%% What if the user never replies?
%% In that case we will have a record
%% (and counters) that is never cleaned up...
NewFields =
[{#reply.state, aborted},
{#reply.pending_timer_ref, undefined}],
megaco_monitor:update_reply_fields(TransId,
NewFields),
handle_request_abort_callback(ConnData,
TransId, Pid, Extra);
true ->
%% Since the user does not know about
%% this call yet, it is safe to cleanup.
%% Should we inform?
Rep2 = Rep#reply{state = aborted},
cancel_reply(ConnData, Rep2, aborted),
ok
end,
prepare_normal_trans(ConnData, Rest, AckList, ReqList,
Extra);
aborted ->
%% -------------------------------------------
%%
%% Pending limit already exceeded
%%
%% Cleanup, just to make sure:
%% reply record & pending counter
%%
%% -------------------------------------------
Rep2 = Rep#reply{state = aborted},
cancel_reply(ConnData, Rep2, aborted),
prepare_normal_trans(ConnData, Rest, AckList, ReqList,
Extra)
end;
%% We can ignore the Converted value here as we *know*
%% conn-data to be correct (not faked), so even if
%% the record was converted, it will now have correct
%% values for user_mod and user_args.
{_Converted,
#reply{state = waiting_for_ack,
bytes = Bin,
version = Version} = Rep} ->
?rt3("request resend when waiting for ack"),
%% We have already sent a reply, but the receiver
%% has obviously not got it. Resend the reply but
%% don't restart the reply_timer.
ConnData2 = ConnData#conn_data{protocol_version = Version},
?report_trace(ConnData2,
"re-send trans reply", [T | {bytes, Bin}]),
case megaco_messenger_misc:send_message(ConnData2, true, Bin) of
{ok, _} ->
ok;
{error, Reason} ->
%% Pass it on to the user (via handle_ack)
cancel_reply(ConnData2, Rep, Reason)
end,
prepare_normal_trans(ConnData2, Rest, AckList, ReqList, Extra);
%% We can ignore the Converted value here as we *know*
%% conn-data to be correct (not faked), so even if
%% the record was converted, it will now have correct
%% values for user_mod and user_args.
{_Converted,
#reply{state = aborted} = Rep} ->
?rt3("request resend when already in aborted state"),
%% OTP-4956:
%% Already aborted so ignore.
%% This furthermore means that the abnoxious user at the
%% other end has already been informed (pending-limit
%% passed => error descriptor sent), but keeps sending...
%%
%% Shall we perform a cleanup?
cancel_reply(ConnData, Rep, aborted),
prepare_normal_trans(ConnData, Rest, AckList, ReqList, Extra)
end.
prepare_ack(ConnData, [TA | T], Rest, AckList, ReqList, Extra)
when is_record(TA, 'TransactionAck') ->
First = TA#'TransactionAck'.firstAck,
Last = TA#'TransactionAck'.lastAck,
TA2 = TA#'TransactionAck'{lastAck = asn1_NOVALUE},
ConnData2 = ConnData#conn_data{serial = First},
AckList2 = do_prepare_ack(ConnData2, TA2, AckList),
if
Last =:= asn1_NOVALUE ->
prepare_ack(ConnData, T, Rest, AckList2, ReqList, Extra);
First < Last ->
TA3 = TA#'TransactionAck'{firstAck = First + 1},
prepare_ack(ConnData, [TA3 | T], Rest, AckList2, ReqList, Extra);
First =:= Last ->
prepare_ack(ConnData, T, Rest, AckList2, ReqList, Extra);
First > Last ->
%% Protocol violation from the sender of this ack
?report_important(ConnData, "<ERROR> discard trans",
[TA, {error, "firstAck > lastAck"}]),
prepare_ack(ConnData, T, Rest, AckList2, ReqList, Extra)
end;
prepare_ack(ConnData, [], Rest, AckList, ReqList, Extra) ->
prepare_normal_trans(ConnData, Rest, AckList, ReqList, Extra).
do_prepare_ack(ConnData, T, AckList) ->
TransId = to_remote_trans_id(ConnData),
case lookup_reply(ConnData, TransId) of
[] ->
%% The reply has already been garbage collected. Ignore.
?report_trace(ConnData, "discard ack (no receiver)", [T]),
AckList;
{_Converted, Rep} when Rep#reply.state =:= waiting_for_ack ->
%% Don't care about Msg and Rep version diff
[{ConnData, Rep, T} | AckList];
{_Converted, _Rep} ->
%% Protocol violation from the sender of this ack
?report_important(ConnData, "<ERROR> discard trans",
[T, {error, "got ack before reply was sent"}]),
AckList
end.
increment_request_keep_alive_counter(#conn_data{conn_handle = CH}, TransId) ->
?rt1(CH, "increment request keep alive counter", [TransId]),
megaco_config:incr_reply_counter(CH, TransId).
create_or_maybe_increment_request_keep_alive_counter(
#conn_data{conn_handle = CH}, TransId) ->
?rt1(CH, "create or maybe increment request keep alive counter",
[TransId]),
try
begin
megaco_config:cre_reply_counter(CH, TransId)
end
catch
_:_ ->
megaco_config:incr_reply_counter(CH, TransId)
end.
check_and_maybe_create_pending_limit(infinity, _, _) ->
ok;
check_and_maybe_create_pending_limit(Limit, Direction, TransId) ->
?rt2("check and maybe create pending limit counter",
[Limit, Direction, TransId]),
try megaco_config:get_pending_counter(Direction, TransId) of
Val when Val =< Limit ->
%% Since we have no intention to increment here, it
%% is ok to be _at_ the limit
ok;
_ ->
aborted
catch
_:_ ->
%% Has not been created yet (connect).
megaco_config:cre_pending_counter(Direction, TransId, 0),
ok
end.
%% check_and_maybe_create_pending_limit(infinity, _, _) ->
%% ok;
%% check_and_maybe_create_pending_limit(Limit, Direction, TransId) ->
%% case (catch megaco_config:get_pending_counter(Direction, TransId)) of
%% {'EXIT', _} ->
%% %% Has not been created yet (connect).
%% megaco_config:cre_pending_counter(Direction, TransId, 0),
%% ok;
%% Val when Val =< Limit ->
%% %% Since we have no intention to increment here, it
%% %% is ok to be _at_ the limit
%% ok;
%% _ ->
%% aborted
%% end.
check_pending_limit(infinity, _, _) ->
{ok, 0};
check_pending_limit(Limit, Direction, TransId) ->
?rt2("check pending limit", [Direction, Limit, TransId]),
try megaco_config:get_pending_counter(Direction, TransId) of
Val when Val =< Limit ->
%% Since we have no intention to increment here, it
%% is ok to be _at_ the limit
?rt2("check pending limit - ok", [Val]),
{ok, Val};
_Val ->
?rt2("check pending limit - aborted", [_Val]),
aborted
catch
_:_ ->
%% This function is only called when we "know" the
%% counter to exist. So, the only reason that this
%% would happen is of the counter has been removed.
%% This only happen if the pending limit has been
%% reached. In any case, this is basically the same
%% as aborted!
?rt2("check pending limit - exit", []),
aborted
end.
check_and_maybe_incr_pending_limit(infinity, _, _) ->
ok;
check_and_maybe_incr_pending_limit(Limit, Direction, TransId) ->
%%
%% We need this kind of test to detect when we _pass_ the limit
%%
?rt2("check and maybe incr pending limit", [{direction, Direction},
{transaction_id, TransId},
{counter_limit, Limit}]),
try megaco_config:get_pending_counter(Direction, TransId) of
Val when Val > Limit ->
?rt2("check and maybe incr - aborted", [{counter_value, Val}]),
aborted; % Already passed the limit
Val ->
?rt2("check and maybe incr - incr", [{counter_value, Val}]),
megaco_config:incr_pending_counter(Direction, TransId),
if
Val < Limit ->
ok; % Still within the limit
true ->
?rt2("check and maybe incr - error",
[{counter_value, Val}]),
error % Passed the limit
end
catch
_:_ ->
%% Has not been created yet (connect).
%% Try create it, but bevare of possible raise condition
try
begin
megaco_config:cre_pending_counter(Direction, TransId, 1),
ok
end
catch
_:_ ->
%% Ouch, raise condition, increment instead...
megaco_config:incr_pending_counter(Direction, TransId),
ok
end
end.
%% BUGBUG BUGBUG BUGBUG
%%
%% Do we know that the Rep is still valid? A previous transaction
%% could have taken a lot of time.
%%
handle_request({ConnData, TransId, T}, Extra) ->
case handle_request(ConnData, TransId, T, Extra) of
{pending, _RequestData} ->
handle_long_request(ConnData, TransId, T, Extra);
Else ->
Else
end.
handle_request(ConnData, TransId, T, Extra) ->
?report_trace(ConnData, "handle request", [TransId, T]),
%% Pending limit:
%% Ok, before we begin, lets check that this request
%% has not been aborted. I.e. exceeded the pending
%% limit, so go check it...
#conn_data{sent_pending_limit = Limit} = ConnData,
case check_and_maybe_create_pending_limit(Limit, sent, TransId) of
ok ->
%% Ok so far, now update state
case megaco_monitor:update_reply_field(TransId,
#reply.state,
eval_request) of
true ->
Actions = T#'TransactionRequest'.actions,
{AckAction, SendReply} =
handle_request_callback(ConnData, TransId, Actions,
T, Extra),
%% Next step, while we where in the callback function,
%% the pending limit could have been exceeded, so check
%% it again...
do_handle_request(AckAction, SendReply,
ConnData, TransId);
false ->
%% Ugh?
ignore
end;
aborted ->
%% Pending limit
%% Already exceeded the limit
%% The user does not yet know about this request, so
%% don't bother telling that it has been aborted...
%% Furthermore, the reply timer has not been started,
%% so do the cleanup now
?rt1(ConnData, "pending limit already passed", [TransId]),
case lookup_reply(ConnData, TransId) of
{_Converted, Rep} ->
cancel_reply(ConnData, Rep, aborted);
_ ->
ok
end,
ignore
end.
do_handle_request(_, ignore, _ConnData, _TransId) ->
?rt1(_ConnData, "ignore: don't reply", [_TransId]),
ignore;
do_handle_request(_, ignore_trans_request, ConnData, TransId) ->
?rt1(ConnData, "ignore trans request: don't reply", [TransId]),
case lookup_reply(ConnData, TransId) of
{_Converted, #reply{} = Rep} ->
cancel_reply(ConnData, Rep, ignore);
_ ->
ignore
end;
do_handle_request({pending, _RequestData}, {aborted, ignore}, _, _) ->
?rt2("handle request: pending - aborted - ignore => don't reply", []),
ignore;
do_handle_request({pending, _RequestData}, {aborted, _SendReply}, _, _) ->
?rt2("handle request: pending - aborted => don't reply", []),
ignore;
do_handle_request({pending, RequestData}, _SendReply, _ConnData, _) ->
?rt2("handle request: pending", [RequestData]),
{pending, RequestData};
do_handle_request(AckAction, {ok, Bin}, ConnData, TransId)
when is_binary(Bin) ->
?rt1(ConnData, "handle request - ok", [AckAction, TransId]),
case lookup_reply(ConnData, TransId) of
{_Converted, #reply{pending_timer_ref = PendingRef} = Rep} ->
#conn_data{reply_timer = InitTimer,
conn_handle = ConnHandle} = ConnData,
%% Pending limit update:
%% - Cancel the pending timer, if running
%% - Delete the pending counter
%%
megaco_monitor:cancel_apply_after(PendingRef),
megaco_config:del_pending_counter(sent, TransId),
Method = timer_method(AckAction),
{WaitFor, CurrTimer} = megaco_timer:init(InitTimer),
OptBin = opt_garb_binary(CurrTimer, Bin),
M = ?MODULE,
F = reply_timeout,
A = [ConnHandle, TransId, CurrTimer],
Ref = megaco_monitor:apply_after(Method, M, F, A,
WaitFor),
Rep2 = Rep#reply{pending_timer_ref = undefined,
handler = undefined,
bytes = OptBin,
state = waiting_for_ack,
timer_ref = Ref,
ack_action = AckAction},
megaco_monitor:insert_reply(Rep2), % Timing problem?
ignore;
_ ->
%% Been removed already?
ignore
end;
do_handle_request(AckAction, {ok, {Sent, NotSent}}, ConnData, TransId)
when is_list(Sent) andalso is_list(NotSent) ->
?rt1(ConnData, "handle request - ok [segmented reply]",
[AckAction, TransId]),
case lookup_reply(ConnData, TransId) of
{_Converted, #reply{pending_timer_ref = PendingRef} = Rep} ->
%% d("do_handle_request -> found reply record:"
%% "~n Rep: ~p", [Rep]),
#conn_data{reply_timer = InitTimer,
conn_handle = ConnHandle} = ConnData,
%% Pending limit update:
%% - Cancel the pending timer, if running
%% - Delete the pending counter
%%
megaco_monitor:cancel_apply_after(PendingRef),
megaco_config:del_pending_counter(sent, TransId),
Method = timer_method(AckAction),
{WaitFor, CurrTimer} = megaco_timer:init(InitTimer),
Garb = fun(Bin) -> opt_garb_binary(CurrTimer, Bin) end,
OptBins = [{SN, Garb(Bin), undefined} || {SN, Bin} <- Sent],
M = ?MODULE,
F = reply_timeout,
A = [ConnHandle, TransId, CurrTimer],
Ref = megaco_monitor:apply_after(Method, M, F, A, WaitFor),
Rep2 = Rep#reply{pending_timer_ref = undefined,
handler = undefined,
bytes = OptBins,
state = waiting_for_ack,
timer_ref = Ref,
ack_action = AckAction,
segments = NotSent},
megaco_monitor:insert_reply(Rep2), % Timing problem?
ignore;
_ ->
%% Been removed already?
ignore
end;
do_handle_request(_, {error, aborted}, ConnData, TransId) ->
?report_trace(ConnData, "aborted during our absence", [TransId]),
case lookup_reply(ConnData, TransId) of
{_Converted, Rep} ->
cancel_reply(ConnData, Rep, aborted);
_ ->
ok
end,
ignore;
do_handle_request(AckAction, {error, Reason}, ConnData, TransId) ->
?report_trace(ConnData, "error", [TransId, Reason]),
case lookup_reply(ConnData, TransId) of
{_Converted, Rep} ->
Rep2 = Rep#reply{state = waiting_for_ack,
ack_action = AckAction},
cancel_reply(ConnData, Rep2, Reason);
_ ->
ok
end,
ignore;
do_handle_request(AckAction, SendReply, ConnData, TransId) ->
?report_trace(ConnData, "unknown send trans reply result",
[TransId, AckAction, SendReply]),
ignore.
handle_requests([{ConnData, TransId, T} | Rest], Pending, Extra) ->
?rt2("handle requests", [TransId]),
case handle_request(ConnData, TransId, T, Extra) of
{pending, RequestData} ->
handle_requests(Rest, [{ConnData,TransId,RequestData} | Pending], Extra);
_ ->
handle_requests(Rest, Pending, Extra)
end;
handle_requests([], Pending, _Extra) ->
?rt2("handle requests - done", [Pending]),
Pending.
%% opt_garb_binary(timeout, _Bin) -> garb_binary; % Need msg at restart of timer
opt_garb_binary(_Timer, Bin) -> Bin.
timer_method(discard_ack) ->
apply_method;
timer_method(_) ->
spawn_method.
handle_long_request({ConnData, TransId, RequestData}, Extra) ->
?rt2("handle long request", [TransId, RequestData]),
%% Pending limit:
%% We need to check the pending limit, in case it was
%% exceeded before we got this far...
%% We dont need to be able to create the counter here,
%% since that was done in the handle_request function.
#conn_data{sent_pending_limit = Limit} = ConnData,
case check_pending_limit(Limit, sent, TransId) of
{ok, _} ->
handle_long_request(ConnData, TransId, RequestData, Extra);
_ ->
%% Already exceeded the limit
ignore
end.
handle_long_request(ConnData, TransId, RequestData, Extra) ->
?report_trace(ConnData, "callback: trans long request",
[TransId, {request_data, RequestData}]),
%% Attempt to update the handler field for this reply record
%% (if there is one).
case megaco_monitor:update_reply_field(TransId, #reply.handler, self()) of
true ->
{AckAction, Res} =
handle_long_request_callback(ConnData, TransId,
RequestData, Extra),
do_handle_long_request(AckAction, Res, ConnData, TransId);
false ->
%% Been removed already?
ignore
end.
do_handle_long_request(AckAction, {ok, Bin}, ConnData, TransId) ->
case megaco_monitor:lookup_reply_field(TransId, #reply.trans_id) of
{ok, _} ->
Method = timer_method(AckAction),
InitTimer = ConnData#conn_data.reply_timer,
{WaitFor, CurrTimer} = megaco_timer:init(InitTimer),
OptBin = opt_garb_binary(CurrTimer, Bin),
ConnHandle = ConnData#conn_data.conn_handle,
M = ?MODULE,
F = reply_timeout,
A = [ConnHandle, TransId, CurrTimer],
Ref = megaco_monitor:apply_after(Method, M, F, A, WaitFor),
NewFields =
[{#reply.bytes, OptBin},
{#reply.state, waiting_for_ack},
{#reply.timer_ref, Ref},
{#reply.ack_action, AckAction}],
megaco_monitor:update_reply_fields(TransId, NewFields); % Timing problem?
_ ->
%% Been removed already?
ignore
end;
do_handle_long_request(_, {error, Reason}, ConnData, TransId) ->
?report_trace(ConnData, "send trans reply", [TransId, {error, Reason}]),
ignore.
handle_request_abort_callback(ConnData, TransId, Pid) ->
Extra = ?default_user_callback_extra,
handle_request_abort_callback(ConnData, TransId, Pid, Extra).
handle_request_abort_callback(ConnData, TransId, Pid, Extra) ->
?report_trace(ConnData, "callback: trans request aborted", [TransId, Pid]),
ConnHandle = ConnData#conn_data.conn_handle,
Version = ConnData#conn_data.protocol_version,
UserMod = ConnData#conn_data.user_mod,
UserArgs = ConnData#conn_data.user_args,
Serial = TransId#trans_id.serial,
Args =
case Extra of
?default_user_callback_extra ->
[ConnHandle, Version, Serial, Pid | UserArgs];
_ ->
[ConnHandle, Version, Serial, Pid, Extra | UserArgs]
end,
Res = (catch apply(UserMod, handle_trans_request_abort, Args)),
?report_debug(ConnData, "return: trans request aborted",
[TransId, {return, Res}]),
case Res of
ok ->
ok;
_ ->
warning_msg("transaction request abort callback failed: ~w",
[Res]),
ok
end.
handle_request_callback(ConnData, TransId, Actions, T, Extra) ->
?report_trace(ConnData, "callback: trans request", [T]),
ConnHandle = ConnData#conn_data.conn_handle,
Version = ConnData#conn_data.protocol_version,
UserMod = ConnData#conn_data.user_mod,
UserArgs = ConnData#conn_data.user_args,
Args =
case Extra of
?default_user_callback_extra ->
[ConnHandle, Version, Actions | UserArgs];
_ ->
[ConnHandle, Version, Actions, Extra | UserArgs]
end,
Res = (catch apply(UserMod, handle_trans_request, Args)),
?report_debug(ConnData, "return: trans request", [T, {return, Res}]),
case Res of
ignore -> %% NOTE: Only used for testing!!
{discard_ack, ignore};
ignore_trans_request ->
{discard_ack, ignore_trans_request};
{discard_ack, Replies} when is_list(Replies) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], asn1_NOVALUE),
{discard_ack, SendReply};
{discard_ack, Error} when is_record(Error, 'ErrorDescriptor') ->
Reply = {transactionError, Error},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], asn1_NOVALUE),
{discard_ack, SendReply};
{discard_ack, Replies, SendOpts} when is_list(Replies) andalso
is_list(SendOpts) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
SendOpts, asn1_NOVALUE),
{discard_ack, SendReply};
{discard_ack, Error, SendOpts}
when is_record(Error, 'ErrorDescriptor') andalso
is_list(SendOpts) ->
Reply = {transactionError, Error},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
SendOpts, asn1_NOVALUE),
{discard_ack, SendReply};
{{handle_pending_ack, AckData}, Replies} when is_list(Replies) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], when_pending_sent),
{{handle_ack, AckData}, SendReply};
{{handle_pending_ack, AckData}, Error}
when is_record(Error, 'ErrorDescriptor') ->
Reply = {transactionError, Error},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], when_pending_sent),
{{handle_ack, AckData}, SendReply};
{{handle_pending_ack, AckData}, Replies, SendOpts}
when is_list(Replies) andalso
is_list(SendOpts) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
SendOpts, when_pending_sent),
{{handle_ack, AckData}, SendReply};
{{handle_pending_ack, AckData}, Error, SendOpts}
when is_record(Error, 'ErrorDescriptor') andalso
is_list(SendOpts) ->
Reply = {transactionError, Error},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
SendOpts, when_pending_sent),
{{handle_ack, AckData}, SendReply};
{{handle_ack, AckData}, Replies} when is_list(Replies) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], 'NULL'),
{{handle_ack, AckData}, SendReply};
{{handle_ack, AckData}, Error}
when is_record(Error, 'ErrorDescriptor') ->
Reply = {transactionError, Error},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], 'NULL'),
{{handle_ack, AckData}, SendReply};
{{handle_ack, AckData}, Replies, SendOpts}
when is_list(Replies) andalso
is_list(SendOpts) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
SendOpts, 'NULL'),
{{handle_ack, AckData}, SendReply};
{{handle_ack, AckData}, Error, SendOpts}
when is_record(Error, 'ErrorDescriptor') andalso
is_list(SendOpts) ->
Reply = {transactionError, Error},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
SendOpts, 'NULL'),
{{handle_ack, AckData}, SendReply};
{{handle_sloppy_ack, AckData}, Replies} when is_list(Replies) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], asn1_NOVALUE),
{{handle_ack, AckData}, SendReply};
{{handle_sloppy_ack, AckData}, Error}
when is_record(Error, 'ErrorDescriptor') ->
Reply = {transactionError, Error},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], asn1_NOVALUE),
{{handle_ack, AckData}, SendReply};
{{handle_sloppy_ack, AckData}, Replies, SendOpts}
when is_list(Replies) andalso
is_list(SendOpts) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
SendOpts, asn1_NOVALUE),
{{handle_ack, AckData}, SendReply};
{{handle_sloppy_ack, AckData}, Error, SendOpts}
when is_record(Error, 'ErrorDescriptor') andalso
is_list(SendOpts) ->
Reply = {transactionError, Error},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
SendOpts, asn1_NOVALUE),
{{handle_ack, AckData}, SendReply};
{pending, RequestData} ->
%% The user thinks that this request will take
%% quite a while to evaluate. Maybe respond with
%% a pending trans (depends on the pending limit)
SendReply = maybe_send_pending(ConnData, TransId),
{{pending, RequestData}, SendReply};
Error ->
ErrorText = atom_to_list(UserMod),
ED = #'ErrorDescriptor'{
errorCode = ?megaco_internal_gateway_error,
errorText = ErrorText},
?report_important(ConnData,
"callback: <ERROR> trans request",
[ED, {error, Error}]),
error_msg("transaction request callback failed: ~w", [Error]),
Reply = {transactionError, ED},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], asn1_NOVALUE),
{discard_ack, SendReply}
end.
handle_long_request_callback(ConnData, TransId, RequestData, Extra) ->
?report_trace(ConnData, "callback: trans long request", [RequestData]),
ConnHandle = ConnData#conn_data.conn_handle,
Version = ConnData#conn_data.protocol_version,
UserMod = ConnData#conn_data.user_mod,
UserArgs = ConnData#conn_data.user_args,
Args =
case Extra of
?default_user_callback_extra ->
[ConnHandle, Version, RequestData | UserArgs];
_ ->
[ConnHandle, Version, RequestData, Extra | UserArgs]
end,
Res = (catch apply(UserMod, handle_trans_long_request, Args)),
?report_debug(ConnData, "return: trans long request",
[{request_data, RequestData}, {return, Res}]),
case Res of
ignore ->
{discard_ack, ignore};
{discard_ack, Replies} when is_list(Replies) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], asn1_NOVALUE),
{discard_ack, SendReply};
{discard_ack, Replies, SendOpts} when is_list(Replies) andalso
is_list(SendOpts) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
SendOpts, asn1_NOVALUE),
{discard_ack, SendReply};
{{handle_ack, AckData}, Replies} when is_list(Replies) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], 'NULL'),
{{handle_ack, AckData}, SendReply};
{{handle_ack, AckData}, Replies, SendOpts} when is_list(Replies)
andalso
is_list(SendOpts) ->
Reply = {actionReplies, Replies},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
SendOpts, 'NULL'),
{{handle_ack, AckData}, SendReply};
Error ->
ErrorText = atom_to_list(UserMod),
ED = #'ErrorDescriptor'{errorCode = ?megaco_internal_gateway_error,
errorText = ErrorText},
?report_important(ConnData, "callback: <ERROR> trans long request",
[ED, {error, Error}]),
error_msg("long transaction request callback failed: ~w", [Error]),
Reply = {transactionError, ED},
SendReply = maybe_send_reply(ConnData, TransId, Reply,
[], asn1_NOVALUE),
{discard_ack, SendReply}
end.
handle_pending(ConnData, T, Extra) ->
TransId = to_local_trans_id(ConnData),
?rt2("handle pending", [T, TransId]),
case megaco_monitor:lookup_request(TransId) of
[Req] ->
%% ------------------------------------------
%%
%% Check received pending limit
%%
%% ------------------------------------------
Limit = ConnData#conn_data.recv_pending_limit,
case check_and_maybe_incr_pending_limit(Limit,
recv, TransId) of
ok ->
%% ----------------------------------------------------
%%
%% Received pending limit not exceeded
%%
%% ----------------------------------------------------
handle_recv_pending(ConnData, TransId, Req, T);
error ->
%% ----------------------------------------------------
%%
%% Received pending limit exceeded
%%
%% Time to give up on this transaction
%% 1) Delete request record
%% 2) Cancel timers
%% 3) Delete the (receive) pending counter
%% 4) Inform the user (handle_trans_reply)
%%
%% ----------------------------------------------------
handle_recv_pending_error(ConnData, TransId, Req, T, Extra);
aborted ->
%% ----------------------------------------------------
%%
%% Received pending limit already exceeded
%%
%% BMK BMK BMK -- can this really happen?
%%
%% The user has already been notified about this
%% (see error above)
%%
%% ----------------------------------------------------
ok
end;
[] ->
?report_trace(ConnData, "remote pending (no receiver)", [T]),
return_unexpected_trans(ConnData, T, Extra)
end.
handle_recv_pending(#conn_data{long_request_resend = LRR,
conn_handle = ConnHandle} = ConnData,
TransId,
#request{timer_ref = {short, Ref},
init_long_timer = InitTimer}, T) ->
?rt2("handle pending - long request", [LRR, InitTimer]),
%% The request seems to take a while,
%% let's reset our transmission timer.
%% We now know the other side has got
%% the request and is working on it,
%% so there is no need to keep the binary
%% message for re-transmission.
%% Start using the long timer.
%% We can now drop the "bytes", since we will
%% not resend from now on.
megaco_monitor:cancel_apply_after(Ref),
{WaitFor, CurrTimer} = megaco_timer:init(InitTimer),
ConnHandle = ConnData#conn_data.conn_handle,
M = ?MODULE,
F = request_timeout,
A = [ConnHandle, TransId],
Ref2 = megaco_monitor:apply_after(M, F, A, WaitFor),
NewFields =
case LRR of
true ->
[{#request.timer_ref, {long, Ref2}},
{#request.curr_timer, CurrTimer}];
false ->
[{#request.bytes, {no_send, garb_binary}},
{#request.timer_ref, {long, Ref2}},
{#request.curr_timer, CurrTimer}]
end,
?report_trace(ConnData, "trans pending (timer restarted)", [T]),
megaco_monitor:update_request_fields(TransId, NewFields); % Timing problem?
handle_recv_pending(_ConnData, _TransId,
#request{timer_ref = {long, _Ref},
curr_timer = timeout}, _T) ->
?rt3("handle pending - timeout"),
%% The request seems to take a while,
%% let's reset our transmission timer.
%% We now know the other side has got
%% the request and is working on it,
%% so there is no need to keep the binary
%% message for re-transmission.
%% This can happen if the timer is running for the last
%% time. I.e. next time it expires, will be the last.
%% Therefor we really do not need to do anything here.
%% The cleanup will be done in request_timeout.
ok;
handle_recv_pending(#conn_data{conn_handle = ConnHandle} = ConnData, TransId,
#request{timer_ref = {long, Ref},
curr_timer = CurrTimer}, T) ->
?rt2("handle pending - still waiting", [CurrTimer]),
%% The request seems to take a while,
%% let's reset our transmission timer.
%% We now know the other side has got
%% the request and is working on it,
%% so there is no need to keep the binary
%% message for re-transmission.
%% We just need to recalculate the timer, i.e.
%% increment the timer (one "slot" has been consumed).
megaco_monitor:cancel_apply_after(Ref),
{WaitFor, Timer2} = megaco_timer:restart(CurrTimer),
ConnHandle = ConnData#conn_data.conn_handle,
M = ?MODULE,
F = request_timeout,
A = [ConnHandle, TransId],
Ref2 = megaco_monitor:apply_after(M, F, A, WaitFor),
NewFields =
[{#request.timer_ref, {long, Ref2}},
{#request.curr_timer, Timer2}],
?report_trace(ConnData,
"long trans pending"
" (timer restarted)", [T]),
%% Timing problem?
megaco_monitor:update_request_fields(TransId, NewFields).
handle_recv_pending_error(ConnData, TransId, Req, T, Extra) ->
%% 1) Delete the request record
megaco_monitor:delete_request(TransId),
%% 2) Possibly cancel the timer
case Req#request.timer_ref of
{_, Ref} ->
megaco_monitor:cancel_apply_after(Ref);
_ ->
ok
end,
%% 3) Delete the (receive) pending counter
megaco_config:del_pending_counter(recv, TransId),
%% 4) Inform the user that his/her request reached
%% the receive pending limit
UserMod = Req#request.user_mod,
UserArgs = Req#request.user_args,
Action = Req#request.reply_action,
UserData = Req#request.reply_data,
UserReply = {error, exceeded_recv_pending_limit},
ConnData2 = ConnData#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
?report_trace(ConnData, "receive pending limit reached", [T]),
return_reply(ConnData2, TransId, UserReply, Extra).
%%
%% This _is_ a segmented message.
%%
%% Since this is not the last segment, we shall not send any ack.
%% (even if three-way-handshake has been configured).
%%
handle_reply(
ConnData,
#megaco_transaction_reply{segmentNumber = SN,
segmentationComplete = asn1_NOVALUE} = T, Extra)
when is_integer(SN) ->
TransId = to_local_trans_id(ConnData),
?rt2("handle segmented reply", [T, TransId, SN]),
case megaco_monitor:lookup_request(TransId) of
%% ---------------------------------------------------------
%% The first segment, so stop the request timer. No longer
%% needed when the segment(s) start to arrive.
[#request{timer_ref = {_Type, Ref},
seg_recv = [],
seg_timer_ref = undefined} = Req] ->
%% Don't care about Req and Rep version diff
?report_trace(ConnData, "[segmented] trans reply - first seg",
[T]),
%% Stop the request timer
megaco_monitor:cancel_apply_after(Ref), %% OTP-4843
%% Acknowledge the segment
send_segment_reply(ConnData, SN),
%% First segment for this reply
NewFields =
[{#request.timer_ref, undefined},
{#request.seg_recv, [SN]}],
megaco_monitor:update_request_fields(TransId, NewFields),
%% Handle the reply
UserMod = Req#request.user_mod,
UserArgs = Req#request.user_args,
Action = Req#request.reply_action,
UserData = Req#request.reply_data,
UserReply =
case T#megaco_transaction_reply.transactionResult of
{transactionError, Reason} ->
{error, {SN, false, Reason}};
{actionReplies, Replies} ->
{ok, {SN, false, Replies}}
end,
ConnData2 = ConnData#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(ConnData2, TransId, UserReply, Extra);
%% ---------------------------------------------------------
%% This is not the first segment.
%% The segment timer has not been started, so the last
%% segment have been received.
%% We must check that this is not a re-transmission!
[#request{seg_recv = Segs,
seg_timer_ref = undefined} = Req] ->
%% Don't care about Req and Rep version diff
?report_trace(ConnData, "[segmented] trans reply - no seg acc",
[T]),
%% Acknowledge the segment
send_segment_reply(ConnData, SN),
%% Updated/handle received segment
case lists:member(SN, Segs) of
true ->
%% This is a re-transmission, so we shall not pass
%% it on to the user (or update the request record).
ok;
false ->
%% First time for this segment
megaco_monitor:update_request_field(TransId,
#request.seg_recv,
[ SN | Segs ]),
%% Handle the reply
UserMod = Req#request.user_mod,
UserArgs = Req#request.user_args,
Action = Req#request.reply_action,
UserData = Req#request.reply_data,
UserReply =
case T#megaco_transaction_reply.transactionResult of
{transactionError, Reason} ->
{error, {SN, false, Reason}};
{actionReplies, Replies} ->
{ok, {SN, false, Replies}}
end,
ConnData2 = ConnData#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(ConnData2, TransId, UserReply, Extra)
end;
%% ---------------------------------------------------------
%% The segment timer is running!
%% This could be the last (out-of-order) segment!
%% We must check that this is not a re-transmission!
[#request{seg_recv = Segs,
seg_timer_ref = SegRef} = Req] ->
%% Don't care about Req and Rep version diff
?report_trace(ConnData, "[segmented] trans reply - no seg acc",
[T]),
%% Acknowledge the segment
send_segment_reply(ConnData, SN),
%% Updated received segments
case lists:member(SN, Segs) of
true ->
%% This is a re-transmission
ok;
false ->
%% First time for this segment,
%% we may now have a complete set
Last =
case is_all_segments([SN | Segs]) of
{true, _Sorted} ->
megaco_monitor:cancel_apply_after(SegRef),
megaco_monitor:delete_request(TransId),
send_ack(ConnData),
true;
{false, Sorted} ->
megaco_monitor:update_request_field(TransId,
#request.seg_recv,
Sorted),
false
end,
%% Handle the reply
UserMod = Req#request.user_mod,
UserArgs = Req#request.user_args,
Action = Req#request.reply_action,
UserData = Req#request.reply_data,
UserReply =
case T#megaco_transaction_reply.transactionResult of
{transactionError, Reason} ->
{error, {SN, Last, Reason}};
{actionReplies, Replies} ->
{ok, {SN, Last, Replies}}
end,
ConnData2 = ConnData#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(ConnData2, TransId, UserReply, Extra)
end;
[] ->
?report_trace(ConnData, "trans reply (no receiver)", [T]),
return_unexpected_trans(ConnData, T, Extra)
end;
%%
%% This _is_ a segmented message and it's the last segment of the
%% message.
%%
handle_reply(
ConnData,
#megaco_transaction_reply{segmentNumber = SN,
segmentationComplete = 'NULL'} = T, Extra)
when is_integer(SN) ->
TransId = to_local_trans_id(ConnData),
?rt2("handle (last) segmented reply", [T, TransId, SN]),
case megaco_monitor:lookup_request(TransId) of
%% ---------------------------------------------------------
%% The first segment, so stop the request timer. No longer
%% needed when the segment(s) start to arrive.
[#request{timer_ref = {_Type, Ref},
seg_recv = [],
seg_timer_ref = undefined} = Req] ->
%% Don't care about Req and Rep version diff
?report_trace(ConnData, "[segmented] trans reply - "
"first/complete seg", [T]),
%% Stop the request timer
megaco_monitor:cancel_apply_after(Ref), %% OTP-4843
%% Acknowledge the ("last") segment
send_segment_reply_complete(ConnData, SN),
%% It is ofcourse pointless to split
%% a transaction into just one segment,
%% but just to be sure, we handle that
%% case also
Last =
if
SN > 1 ->
%% More then one segment
%% First time for this segment
ConnHandle = ConnData#conn_data.conn_handle,
InitSegTmr = Req#request.init_seg_timer,
{WaitFor, CurrTimer} = megaco_timer:init(InitSegTmr),
M = ?MODULE,
F = segment_timeout,
A = [ConnHandle, TransId, CurrTimer],
SegRef =
megaco_monitor:apply_after(M, F, A, WaitFor),
NewFields =
[{#request.timer_ref, undefined},
{#request.seg_recv, [SN]},
{#request.seg_timer_ref, SegRef}],
megaco_monitor:update_request_fields(TransId, NewFields),
false;
true ->
%% Just one segment!
megaco_monitor:delete_request(TransId),
send_ack(ConnData),
true
end,
%% Handle the reply
UserMod = Req#request.user_mod,
UserArgs = Req#request.user_args,
Action = Req#request.reply_action,
UserData = Req#request.reply_data,
UserReply =
case T#megaco_transaction_reply.transactionResult of
{transactionError, Reason} ->
{error, {SN, Last, Reason}};
{actionReplies, Replies} ->
{ok, {SN, Last, Replies}}
end,
ConnData2 = ConnData#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(ConnData2, TransId, UserReply, Extra);
[#request{seg_recv = Segs} = Req] ->
%% Don't care about Req and Rep version diff
?report_trace(ConnData, "[segmented] trans reply - no seg acc",
[T]),
%% Acknowledge the ("last") segment
send_segment_reply_complete(ConnData, SN),
%% Updated received segments
%% This is _probably_ the last segment, but some of
%% the previous segments may have been lost, so we
%% may not have a complete set!
case lists:member(SN, Segs) of
true ->
%% This is a re-transmission
ok;
false ->
Last =
case is_all_segments([SN | Segs]) of
{true, _Sorted} ->
?report_trace(ConnData,
"[segmented] trans reply - "
"complete set", [T]),
megaco_monitor:delete_request(TransId),
send_ack(ConnData),
true;
{false, Sorted} ->
ConnHandle = ConnData#conn_data.conn_handle,
InitSegTmr = Req#request.init_seg_timer,
{WaitFor, CurrTimer} =
megaco_timer:init(InitSegTmr),
M = ?MODULE,
F = segment_timeout,
A = [ConnHandle, TransId, CurrTimer],
SegRef =
megaco_monitor:apply_after(M, F, A,
WaitFor),
NewFields =
[{#request.seg_recv, Sorted},
{#request.seg_timer_ref, SegRef}],
megaco_monitor:update_request_fields(TransId, NewFields),
false
end,
%% Handle the reply
UserMod = Req#request.user_mod,
UserArgs = Req#request.user_args,
Action = Req#request.reply_action,
UserData = Req#request.reply_data,
UserReply =
case T#megaco_transaction_reply.transactionResult of
{transactionError, Reason} ->
{error, {SN, Last, Reason}};
{actionReplies, Replies} ->
{ok, {SN, Last, Replies}}
end,
ConnData2 = ConnData#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(ConnData2, TransId, UserReply, Extra)
end;
[] ->
?report_trace(ConnData, "trans reply (no receiver)", [T]),
return_unexpected_trans(ConnData, T, Extra)
end;
%%
%% This is _not_ a segmented message,
%% i.e. it's an ordinary transaction reply
%%
handle_reply(#conn_data{conn_handle = CH} = CD, T, Extra) ->
TransId = to_local_trans_id(CD),
?rt2("handle reply", [T, TransId]),
case megaco_monitor:lookup_request(TransId) of
[Req] when (is_record(Req, request) andalso
(CD#conn_data.cancel =:= true)) ->
?TC_AWAIT_REPLY_EVENT(true),
do_handle_reply_cancel(CD, Req, T);
[#request{remote_mid = RMid} = Req] when ((RMid =:= preliminary_mid) orelse
(RMid =:= CH#megaco_conn_handle.remote_mid)) ->
?TC_AWAIT_REPLY_EVENT(false),
%% Just in case conn_data got update after our lookup
%% but before we looked up the request record, we
%% check the cancel field again.
case megaco_config:conn_info(CD, cancel) of
true ->
do_handle_reply_cancel(CD, Req, T);
false ->
do_handle_reply(CD, Req, TransId, T, Extra)
end;
[#request{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData,
remote_mid = RMid}] ->
?report_trace(CD,
"received trans reply with invalid remote mid",
[T, RMid]),
WrongMid = CH#megaco_conn_handle.remote_mid,
T2 = transform_transaction_reply_enc(CD#conn_data.protocol_version,
T),
UserReply = {error, {wrong_mid, WrongMid, RMid, T2}},
CD2 = CD#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(CD2, TransId, UserReply, Extra);
[] ->
?TC_AWAIT_REPLY_EVENT(undefined),
?report_trace(CD, "trans reply (no receiver)", [T]),
return_unexpected_trans(CD, T, Extra)
end.
do_handle_reply_cancel(CD, #request{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData}, T) ->
CD2 = CD#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_unexpected_trans(CD2, T).
%% Plain old handling of incomming replies
do_handle_reply(CD,
#request{timer_ref = {_Type, Ref}, % OTP-4843
user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData,
keep_alive_timer = RKAT},
TransId, T, Extra)
when ((RKAT =:= plain) orelse (Action =:= call)) ->
%% Don't care about Req and Rep version diff
?report_trace(CD, "trans reply", [T]),
%% This is the first reply (maybe of many)
megaco_monitor:delete_request(TransId),
megaco_monitor:cancel_apply_after(Ref), % OTP-4843
megaco_config:del_pending_counter(recv, TransId), % OTP-7189
%% Send acknowledgement
maybe_send_ack(T#megaco_transaction_reply.immAckRequired, CD),
UserReply =
case T#megaco_transaction_reply.transactionResult of
{transactionError, Reason} ->
{error, Reason};
{actionReplies, Replies} ->
{ok, Replies}
end,
CD2 = CD#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(CD2, TransId, UserReply, Extra);
%% This may be the first reply (of maybe many)
do_handle_reply(CD,
#request{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData,
keep_alive_ref = undefined} = Req,
TransId, T, Extra) ->
%% Don't care about Req and Rep version diff
?report_trace(CD, "trans reply", [T]),
%% Could be the first reply, in which case we shall start the
%% Request Keep Alive timer...
%% This could happen for more than one (1) reply though, so
%% we need to check if the counter value actually equals one (1)!
ReplyNo =
create_or_maybe_increment_request_keep_alive_counter(CD, TransId),
if
(ReplyNo =:= 1) ->
%% This *is* the first reply!!
%% 1) Stop resend timer
{_Type, Ref} = Req#request.timer_ref, % OTP-4843
megaco_monitor:cancel_apply_after(Ref), % OTP-4843
%% 2) Delete pending counter
megaco_config:del_pending_counter(recv, TransId), % OTP-7189
%% 3) Start request keep alive timer
ConnHandle = CD#conn_data.conn_handle,
RKATimer = Req#request.keep_alive_timer,
{RKAWaitFor, _} = megaco_timer:init(RKATimer),
RKARef = megaco_monitor:apply_after(?MODULE,
request_keep_alive_timeout,
[ConnHandle, TransId],
RKAWaitFor),
%% 4) Maybe send acknowledgement (three-way-handshake)
maybe_send_ack(T#megaco_transaction_reply.immAckRequired, CD),
%% 5) And finally store the updated request record
Req2 = Req#request{keep_alive_ref = RKARef},
megaco_monitor:insert_request(Req2);
true ->
ok
end,
UserReply =
case T#megaco_transaction_reply.transactionResult of
{transactionError, Reason} ->
{error, ReplyNo, Reason};
{actionReplies, Replies} ->
{ok, ReplyNo, Replies}
end,
CD2 = CD#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(CD2, TransId, UserReply, Extra);
%% This is *not* the first reply (of many)
do_handle_reply(CD, #request{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData}, TransId, T, Extra) ->
%% Don't care about Req and Rep version diff
?report_trace(CD, "trans reply (first reply already delivered)", [T]),
ReplyNo = increment_request_keep_alive_counter(CD, TransId),
UserReply =
case T#megaco_transaction_reply.transactionResult of
{transactionError, Reason} ->
{error, ReplyNo, Reason};
{actionReplies, Replies} ->
{ok, ReplyNo, Replies}
end,
CD2 = CD#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(CD2, TransId, UserReply, Extra).
is_all_segments(Segs) ->
Sorted = lists:sort(Segs),
{is_all_segments(Sorted, 1, lists:last(Sorted)), Sorted}.
is_all_segments([Last], Last, Last) ->
true;
is_all_segments([_], _, _) ->
false;
is_all_segments([SN|Segs], SN, Last) when (SN < Last) ->
is_all_segments(Segs, SN+1, Last);
is_all_segments([SN1|_], SN2, _Last) when SN1 =/= SN2 ->
false.
handle_segment_reply(CD,
#'SegmentReply'{transactionId = TransId,
segmentNumber = SN,
segmentationComplete = SC}, Extra) ->
?rt2("handle segment reply", [{trans_id, TransId},
{segment_no, SN},
{segmentation_complete, SC}]),
TransId2 = to_remote_trans_id(CD#conn_data{serial = TransId}),
case lookup_reply(CD, TransId2) of
{_Converted,
#reply{bytes = Sent,
segments = []} = Rep} when is_list(Sent) ->
?rt2("no unsent segments", [Sent]),
handle_segment_reply_callback(CD, TransId, SN, SC, Extra),
case lists:keysearch(SN, 1, Sent) of
{value, {SN, _Bin, SegTmr}} ->
megaco_monitor:cancel_apply_after(SegTmr), %% BMK BMK
case lists:keydelete(SN, 1, Sent) of
[] -> %% We are done
Ref = Rep#reply.timer_ref,
megaco_monitor:cancel_apply_after(Ref),
megaco_monitor:update_reply_field(TransId2,
#reply.bytes,
[]),
ok;
NewSent ->
megaco_monitor:update_reply_field(TransId2,
#reply.bytes,
NewSent),
ok
end;
_ ->
ok
end;
{_Converted,
#reply{bytes = Sent,
segments = NotSent}} when is_list(Sent) andalso
is_list(NotSent) ->
?rt2("unsent segments", [Sent, NotSent]),
handle_segment_reply_callback(CD, TransId, SN, SC, Extra),
case lists:keysearch(SN, 1, Sent) of
{value, {SN, _Bin, SegTmr}} ->
megaco_monitor:cancel_apply_after(SegTmr), %% BMK BMK
NewSent = lists:keydelete(SN, 1, Sent),
[{SN2, Bin2}|NewNotSent] = NotSent,
case send_reply_segment(CD, "send trans reply segment",
SN2, Bin2) of
{ok, Bin3} ->
?rt2("another segment sent", [Bin3]),
NewSent2 = [{SN2, Bin3, undefined}|NewSent],
NewFields =
[{#reply.bytes, NewSent2},
{#reply.segments, NewNotSent}],
megaco_monitor:update_reply_fields(TransId2,
NewFields),
ok;
Error ->
incNumErrors(CD#conn_data.conn_handle),
?report_important(CD, "failed sending segment",
[{segment_no, SN2},
{error, Error}]),
error_msg("failed sending transaction reply [~w] "
"segment [~w]: ~w",
[TransId, SN2, Error]),
megaco_monitor:update_reply_field(TransId2,
#reply.bytes,
NewSent),
ok
end;
_ ->
ok
end;
{_Converted,
#reply{state = State}} ->
%% We received a segment reply for a segmented reply we have
%% not yet sent? This is either some sort of race condition
%% or the "the other side" is really confused.
%% Ignore the message but issue a warning just in case...
warning_msg("received unexpected segment reply: "
"~n Transaction Id: ~p"
"~n Segment Number: ~p"
"~n Segmentation Complete: ~p"
"~n Reply state: ~p",
[TransId2, SN, SC, State]),
ignore;
[] ->
ignore
end.
%%
%% This should be passed on to the user only if the user wish it
%% (sri = segment reply indication)
%%
handle_segment_reply_callback(#conn_data{segment_reply_ind = true,
conn_handle = ConnHandle,
protocol_version = Version,
user_mod = UserMod,
user_args = UserArgs},
TransId, SN, SC, Extra) ->
Args =
case Extra of
?default_user_callback_extra ->
[ConnHandle, Version, TransId, SN, SC | UserArgs];
_ ->
[ConnHandle, Version, TransId, SN, SC, Extra | UserArgs]
end,
(catch apply(UserMod, handle_segment_reply, Args));
handle_segment_reply_callback(_CD, _TransId, _SN, _SC, _Extra) ->
ok.
handle_acks([{ConnData, Rep, T} | Rest], Extra)
when Rep#reply.state == waiting_for_ack ->
handle_ack(ConnData, ok, Rep, T, Extra),
handle_acks(Rest, Extra);
handle_acks([], _Extra) ->
ok.
%% If the reply to which this is the ack was segmented,
%% then we also need to check that we have received all
%% the segment-replies. If not, an error callback call
%% shall be made instead.
handle_ack(ConnData, AckStatus,
#reply{trans_id = TransId,
bytes = Bytes,
timer_ref = ReplyRef,
pending_timer_ref = PendingRef, %% BMK Still running?
ack_action = AckAction}, T, Extra)
when is_binary(Bytes) orelse (Bytes =:= undefined) ->
handle_ack_cleanup(TransId, ReplyRef, PendingRef),
handle_ack_callback(ConnData, AckStatus, AckAction, T, Extra);
handle_ack(ConnData, AckStatus,
#reply{trans_id = TransId,
bytes = [],
segments = [],
timer_ref = ReplyRef,
pending_timer_ref = PendingRef, %% BMK Still running?
ack_action = AckAction}, T, Extra) ->
handle_ack_cleanup(TransId, ReplyRef, PendingRef),
handle_ack_callback(ConnData, AckStatus, AckAction, T, Extra);
handle_ack(ConnData, OrigAckStatus,
#reply{trans_id = TransId,
bytes = SegSent,
segments = NotSent,
timer_ref = ReplyRef,
pending_timer_ref = PendingRef, %% BMK Still running?
ack_action = OrigAckAction}, T, Extra)
when is_list(SegSent) andalso is_list(NotSent) ->
SN_NotAcked = [SN || {SN, _, _} <- SegSent],
SN_NotSent = [SN || {SN, _} <- NotSent],
AckStatus = {error, {segment_failure,
[{original_ack_status, OrigAckStatus},
{segments_not_acked, SN_NotAcked},
{segments_not_sent, SN_NotSent}]}},
AckAction =
case OrigAckAction of
{handle_ack, _} ->
OrigAckAction;
_ ->
{handle_ack, segmented_reply}
end,
cancel_segment_timers(SegSent),
handle_ack_cleanup(TransId, ReplyRef, PendingRef),
handle_ack_callback(ConnData, AckStatus, AckAction, T, Extra).
handle_ack_cleanup(TransId, ReplyRef, PendingRef) ->
megaco_monitor:cancel_apply_after(ReplyRef),
megaco_monitor:cancel_apply_after(PendingRef),
megaco_monitor:delete_reply(TransId),
megaco_config:del_pending_counter(sent, TransId). %% BMK: Still existing?
cancel_segment_timers(SegSent) when is_list(SegSent) ->
Cancel = fun({_, _, Ref}) ->
megaco_monitor:cancel_apply_after(Ref)
end,
lists:foreach(Cancel, SegSent);
cancel_segment_timers(_) ->
ok.
handle_ack_callback(_CD, ok = _AS, discard_ack = _AA, _T, _Extra) ->
ok;
handle_ack_callback(ConnData, {error, Reason}, discard_ack = AckAction, T, Extra) ->
?report_trace(ConnData, "handle ack (no callback)",
[T, AckAction, {error, Reason}, Extra]);
handle_ack_callback(ConnData, AckStatus, {handle_ack, AckData}, T, Extra) ->
?report_trace(ConnData, "callback: trans ack", [{ack_data, AckData}]),
ConnHandle = ConnData#conn_data.conn_handle,
Version = ConnData#conn_data.protocol_version,
UserMod = ConnData#conn_data.user_mod,
UserArgs = ConnData#conn_data.user_args,
Args =
case Extra of
?default_user_callback_extra ->
[ConnHandle, Version, AckStatus, AckData | UserArgs];
_ ->
[ConnHandle, Version, AckStatus, AckData, Extra | UserArgs]
end,
Res = (catch handle_callback(ConnData, UserMod, handle_trans_ack, Args)),
?report_debug(ConnData, "return: trans ack", [T, AckData, {return, Res}]),
case Res of
ok ->
ok;
_ ->
warning_msg("transaction ack callback failed: ~w", [Res]),
ok
end,
Res.
handle_callback(ConnData, undefined = _UserMod, Func, Args) ->
?report_important(ConnData, "callback: unknown callback module",
[{func, Func}, {args, Args}]),
ok;
handle_callback(_ConnData, UserMod, Func, Args) ->
(catch apply(UserMod, Func, Args)).
handle_message_error(ConnData, _Error, _Extra)
when ConnData#conn_data.monitor_ref == undefined_monitor_ref ->
%% May occur if another process already has setup a
%% temporary connection, but the handle_connect callback
%% function has not yet returned before the eager MG
%% re-sends its initial service change message.
ignore;
handle_message_error(ConnData, Error, Extra) ->
?report_trace(ConnData, "callback: message error", [Error]),
ConnHandle = ConnData#conn_data.conn_handle,
Version = ConnData#conn_data.protocol_version,
UserMod = ConnData#conn_data.user_mod,
UserArgs = ConnData#conn_data.user_args,
Args =
case Extra of
?default_user_callback_extra ->
[ConnHandle, Version, Error | UserArgs];
_ ->
[ConnHandle, Version, Error, Extra | UserArgs]
end,
Res = (catch apply(UserMod, handle_message_error, Args)),
?report_debug(ConnData, "return: message error", [Error, {return, Res}]),
case Res of
ok ->
ok;
_ ->
warning_msg("message error callback failed: ~w", [Res]),
ok
end,
Res.
handle_disconnect_callback(ConnData, UserReason)
when is_record(ConnData, conn_data) ->
?report_trace(ConnData, "callback: disconnect", [{reason, UserReason}]),
ConnHandle = ConnData#conn_data.conn_handle,
Version = ConnData#conn_data.protocol_version,
UserMod = ConnData#conn_data.user_mod,
UserArgs = ConnData#conn_data.user_args,
Args = [ConnHandle, Version, UserReason | UserArgs],
Res = (catch apply(UserMod, handle_disconnect, Args)),
?report_debug(ConnData, "return: disconnect", [{reason, UserReason}, {return, Res}]),
case Res of
ok ->
ok;
_ ->
warning_msg("disconnect callback failed: ~w", [Res]),
ok
end,
Res.
%%----------------------------------------------------------------------
%% Test "outgoing" messages
%%----------------------------------------------------------------------
%% test_request/5 -> {MegacoMessage, EncodingRes}
%%
%% This function is only intended for testing
%% (e.g. answer the question: have I constructed a valid action request?)
%%
%% It's not exactly the same code as a call to 'call'
%% or 'cast' but close enough.
%%
test_request(ConnHandle, Actions,
Version, EncodingMod, EncodingConfig)
when is_record(ConnHandle, megaco_conn_handle) and
is_integer(Version) andalso is_atom(EncodingMod) ->
%% Create a fake conn_data structure
ConnData = #conn_data{serial = 1,
protocol_version = Version,
conn_handle = ConnHandle,
auth_data = asn1_NOVALUE,
encoding_mod = EncodingMod,
encoding_config = EncodingConfig},
TRs = test_req_compose_transactions(ConnData, Actions),
Body = {transactions, TRs},
MegaMsg = megaco_messenger_misc:compose_message(ConnData, Version, Body),
EncodeRes = megaco_messenger_misc:encode_message(ConnData, MegaMsg),
{MegaMsg, EncodeRes}.
test_req_compose_transactions(ConnData, [A|_] = ActionsList) when is_list(A) ->
LastSerial = ConnData#conn_data.serial,
test_req_compose_transactions(LastSerial, lists:reverse(ActionsList), []);
test_req_compose_transactions(#conn_data{serial = Serial}, Actions) ->
TR = #'TransactionRequest'{transactionId = Serial,
actions = Actions},
[{transactionRequest, TR}].
test_req_compose_transactions(_Serial, [], Acc) ->
lists:reverse(Acc);
test_req_compose_transactions(Serial, [A|As], Acc) ->
TR = #'TransactionRequest'{transactionId = Serial,
actions = A},
test_req_compose_transactions(Serial, As, [{transactionRequest, TR}|Acc]).
test_reply(ConnHandle, Version, EncodingMod, EncodingConfig, Error)
when is_record(Error, 'ErrorDescriptor') ->
Reply = {transactionError, Error},
test_reply_encode(ConnHandle, Version, EncodingMod, EncodingConfig, Reply);
test_reply(ConnHandle, Version, EncodingMod, EncodingConfig, Replies)
when is_list(Replies) ->
Reply = {actionReplies, Replies},
test_reply_encode(ConnHandle, Version, EncodingMod, EncodingConfig, Reply).
test_reply_encode(ConnHandle, Version, EncodingMod, EncodingConfig, Reply) ->
ImmAck = asn1_NOVALUE,
Serial = 1,
%% Create a fake conn_data structure
CD = #conn_data{serial = Serial,
protocol_version = Version,
conn_handle = ConnHandle,
auth_data = asn1_NOVALUE,
encoding_mod = EncodingMod,
encoding_config = EncodingConfig},
TR0 = #megaco_transaction_reply{transactionId = Serial,
immAckRequired = ImmAck,
transactionResult = Reply},
TR = megaco_messenger_misc:transform_transaction_reply(CD, TR0),
Body = {transactions, [{transactionReply, TR}]},
MegaMsg = megaco_messenger_misc:compose_message(CD, Version, Body),
EncodeRes = megaco_messenger_misc:encode_message(CD, MegaMsg),
{MegaMsg, EncodeRes}.
%%----------------------------------------------------------------------
%% Send (or prepare) outgoing messages
%%----------------------------------------------------------------------
%% Description:
%% Encode a list of actions or a list of list of actions for
%% later sending (using call or cast).
%%
%% encode_actions(CH, Acts, Opts) -> {ok, encoded_actions()} | {error, Reason}
%% CH -> connection_handle()
%% Acts -> action_reqs() | [action_reqs()]
%% action_reqs() -> [action_req()]
%% action_req() -> #'ActionRequest'{}
%% Opts -> [option()]
%% option() -> {Tab, Val}
%% Tag -> atom()
%% Val -> term()
%% encoded_actions() -> binary() | [binary()]
%% Reason -> term()
encode_actions(CH, [A|_] = ActionsList, Opts)
when is_record(CH, megaco_conn_handle) andalso is_list(A) ->
(catch encode_multi_actions(CH, ActionsList, Opts));
encode_actions(CH, [A|_] = Actions, Opts)
when is_record(CH, megaco_conn_handle) andalso is_tuple(A) ->
do_encode_actions(CH, Actions, Opts).
encode_multi_actions(CH, ActionsList, Opts) ->
case prepare_req_send_options(CH, Opts) of
{ok, CD} ->
ActsList = [encode_multi_actions(CD, Acts) || Acts <- ActionsList],
{ok, ActsList};
Error ->
Error
end.
encode_multi_actions(CD, Actions) ->
case megaco_messenger_misc:encode_actions(CD,
"encode multi actions",
Actions) of
{ok, Bin} ->
Bin;
Error ->
throw(Error)
end.
do_encode_actions(CH, Actions, Opts)
when is_record(CH, megaco_conn_handle) ->
case prepare_req_send_options(CH, Opts) of
{ok, CD} ->
megaco_messenger_misc:encode_actions(CD,
"encode actions",
Actions);
Error ->
Error
end.
prepare_req_send_options(CH, Opts) ->
case megaco_config:lookup_local_conn(CH) of
[CD] ->
override_req_send_options(any, CD, Opts);
[] ->
{error, {not_found, conn_data}}
end.
call(ConnHandle, Actions, Options) ->
case lists:keymember(reply_data, 1, Options) of
true ->
{error, {bad_option, reply_data}};
false ->
Self = self(),
ProxyFun = fun() -> call_proxy(Self) end,
{Proxy, MRef} = erlang:spawn_monitor(ProxyFun),
Options2 = [{reply_data, Proxy} | Options],
call_or_cast(call, ConnHandle, Actions, Options2, MRef)
end.
cast(ConnHandle, Actions, Options) ->
call_or_cast(cast, ConnHandle, Actions, Options, undefined).
%% In a transaction there can be several actions, so if the
%% First element of the Actions list is an ''ActionRequest''
%% record this a list of ActionRequest's for one Transaction
%% request. If on the other hand this is not the case, then
%% the Actions list is assumed to be a list of list of
%% ActionRequest. That is, action requests for several transactions.
%% It could also be a binary or a list of binaries (if
%% the actions has already been encoded).
call_or_cast(CallOrCast, ConnHandle, [A|_] = Actions, Options, ProxyMon)
when is_tuple(A) ->
%% Just one transaction
case call_or_cast(CallOrCast, ConnHandle, [Actions], Options, ProxyMon) of
ok ->
ok;
{error, Reason} ->
{error, Reason};
{Version, [Reply]} when is_integer(Version) ->
{Version, Reply};
{Version, Error} when is_integer(Version) ->
{Version, Error}
end;
call_or_cast(CallOrCast, ConnHandle, Actions, Options, ProxyMon)
when is_binary(Actions) ->
%% Just one transaction (although the actions has already been encoded)
case call_or_cast(CallOrCast, ConnHandle, [Actions], Options, ProxyMon) of
ok ->
ok;
{error, Reason} ->
{error, Reason};
{Version, [Reply]} when is_integer(Version) ->
{Version, Reply};
{Version, Error} when is_integer(Version) ->
{Version, Error}
end;
call_or_cast(CallOrCast, ConnHandle, ActionsList, Options, ProxyMon)
when is_record(ConnHandle, megaco_conn_handle) ->
case prepare_req_send_options(CallOrCast,
ConnHandle, Options, ActionsList) of
{ok, ConnData} ->
?report_trace(ConnData, "call_or_cast - options prepared", []),
case encode_requests(ConnData, ActionsList) of
{ok, TRs, BinOrBins} ->
?report_trace(ConnData,
"call_or_cast - request encoded", []),
send_request(ConnData, ConnHandle,
TRs, CallOrCast, BinOrBins),
case CallOrCast of
call ->
TransIds = to_local_trans_id(ConnData, TRs),
wait_for_reply(ConnData, TransIds, ProxyMon);
cast ->
ok
end;
{error, Reason} ->
call_proxy_cleanup(ConnData, ProxyMon),
Version = ConnData#conn_data.protocol_version,
return_error(CallOrCast, Version, {error, Reason})
end;
{error, Reason} ->
call_proxy_cleanup(Options, ProxyMon),
return_error(CallOrCast, 1, {error, Reason})
end;
call_or_cast(CallOrCast, ConnHandle, _Actions, Options, ProxyMon) ->
call_proxy_cleanup(Options, ProxyMon),
return_error(CallOrCast, 1, {error, {bad_megaco_conn_handle, ConnHandle}}).
return_error(Action, Version, Error) ->
case Action of
call -> {Version, Error};
cast -> Error
end.
wait_for_reply(CD, TransIds, ProxyMon) ->
ProxyPid = CD#conn_data.reply_data,
ProxyPid ! {go, self(), CD, TransIds},
receive
{reply, ProxyPid, Reply} ->
erlang:demonitor(ProxyMon, [flush]),
Reply;
{'DOWN', ProxyMon, process, ProxyPid, Info} ->
UserReply = {error, {call_proxy_crash, Info}},
{CD#conn_data.protocol_version, UserReply}
end.
call_proxy_cleanup(#conn_data{reply_data = ProxyPid}, ProxyMon) ->
do_call_proxy_cleanup(ProxyPid, ProxyMon);
call_proxy_cleanup(Options, ProxyMon) when is_list(Options) ->
ProxyPid =
case lists:keysearch(reply_data, 1, Options) of
{value, {reply_data, Data}} ->
Data;
_ ->
undefined
end,
do_call_proxy_cleanup(ProxyPid, ProxyMon);
call_proxy_cleanup(ProxyPid, ProxyMon) ->
do_call_proxy_cleanup(ProxyPid, ProxyMon).
do_call_proxy_cleanup(ProxyPid, ProxyMon) ->
maybe_demonitor(ProxyMon),
maybe_stop_proxy(ProxyPid),
ok.
maybe_demonitor(undefined) ->
ok;
maybe_demonitor(Mon) ->
(catch erlang:demonitor(Mon, [flush])),
ok.
maybe_stop_proxy(Pid) when is_pid(Pid) ->
Pid ! {stop, self()},
ok;
maybe_stop_proxy(_) ->
ok.
call_proxy(Parent) ->
receive
{go, Parent, CD, TransIds} ->
call_proxy(Parent, CD, TransIds);
{stop, Parent} ->
exit(normal)
end.
call_proxy(Parent, CD, TransIds) ->
Reply = proxy_wait_for_reply(CD, TransIds, []),
Parent ! {reply, self(), Reply},
call_proxy_gc(CD, CD#conn_data.call_proxy_gc_timeout).
call_proxy_gc(CD, Timeout) when (Timeout > 0) ->
T = t(),
receive
{?MODULE, TransId, Version, Result} -> % Old format
CD2 = CD#conn_data{protocol_version = Version},
Extra = ?default_user_callback_extra,
return_unexpected_trans_reply(CD2, TransId, Result, Extra),
call_proxy_gc(CD, Timeout - (t() - T));
{?MODULE, TransId, Version, Result, Extra} ->
CD2 = CD#conn_data{protocol_version = Version},
return_unexpected_trans_reply(CD2, TransId, Result, Extra),
call_proxy_gc(CD, Timeout - (t() - T))
after Timeout ->
exit(normal)
end;
call_proxy_gc(_CD, _Timeout) ->
exit(normal).
proxy_wait_for_reply(_CD, [], Replies0) ->
% Make sure they come in the same order as the requests where sent
Replies1 = lists:keysort(2, Replies0),
%% Must all be the same version
[{Version, _, _}|_] = Replies1,
Replies2 = [Result || {_Version, _TransId, Result} <- Replies1],
{Version, Replies2};
proxy_wait_for_reply(CD, TransIds, Replies) ->
receive
{?MODULE, TransId, Version, Reply} -> % Old format
{TransIds2, Replies2} =
wfr_handle_reply(CD,
TransIds, TransId,
Version, Replies, Reply),
proxy_wait_for_reply(CD, TransIds2, Replies2);
{?MODULE, TransId, Version, Reply, Extra} ->
{TransIds2, Replies2} =
wfr_handle_reply(CD,
TransIds, TransId,
Version, Replies, Reply, Extra),
proxy_wait_for_reply(CD, TransIds2, Replies2)
end.
wfr_handle_reply(CD, TransIds, TransId, Version, Replies, Reply) ->
Extra = ?default_user_callback_extra,
wfr_handle_reply(CD, TransIds, TransId, Version, Replies, Reply, Extra).
wfr_handle_reply(CD, TransIds, TransId, Version, Replies, Reply, Extra) ->
%% Is this meant for us?
case lists:member(TransId, TransIds) of
true -> % Yep
wfr_update(TransIds, TransId, Version, Replies, Reply, Extra);
false -> % Nop
CD2 = CD#conn_data{protocol_version = Version},
return_unexpected_trans_reply(CD2, TransId, Reply, Extra),
{TransIds, Replies}
end.
wfr_mk_reply(Version, TransId, Result, ?default_user_callback_extra = _Extra) ->
{Version, TransId, Result};
wfr_mk_reply(Version, TransId, Result0, Extra) ->
Result = list_to_tuple(lists:append(tuple_to_list(Result0), [Extra])),
{Version, TransId, Result}.
%% Last segment of a reply
%% transactionResult "=" actionReplies
wfr_update(TransIds, TransId, Version, Results, {ok, {SegNo, Last, ARs}}, Extra)
when is_integer(SegNo) andalso (Last == true) ->
TransIds2 = lists:delete(TransId, TransIds),
case lists:keysearch(TransId, 2, Results) of
%% All segments ok (actionReplies)
{value, {V, TransId, {ok, SegReps}}} ->
SegReps2 = lists:keysort(1, [{SegNo, ARs}|SegReps]),
Rep = wfr_mk_reply(V, TransId, {ok, SegReps2}, Extra),
Results2 = lists:keyreplace(TransId, 2, Results, Rep),
{TransIds2, Results2};
%% Atleast one segment error (transactionError)
{value, {V, TransId, {error, {segment, OkSegs, ErrSegs}}}} ->
OkSegs2 = lists:keysort(1, [{SegNo, ARs}|OkSegs]),
ErrSegs2 = lists:keysort(1, ErrSegs),
Error = {error, {segment, OkSegs2, ErrSegs2}},
Rep = wfr_mk_reply(V, TransId, Error, Extra),
Results2 = lists:keyreplace(TransId, 2, Results, Rep),
{TransIds2, Results2};
false ->
%% First and only segment
Rep = wfr_mk_reply(Version, TransId, {ok, [{SegNo, ARs}]}, Extra),
{TransIds2, [Rep | Results]}
end;
%% Last segment of a reply
%% transactionResult "=" transactionError
wfr_update(TransIds, TransId, Version, Results, {error, {SegNo, Last, ED}}, Extra)
when is_integer(SegNo) andalso (Last == true) ->
TransIds2 = lists:delete(TransId, TransIds),
case lists:keysearch(TransId, 2, Results) of
%% First segment with error (transactionError)
{value, {V, TransId, {ok, SegReps}}} ->
OkSegs = lists:keysort(1, [{SegNo, ED}|SegReps]),
ErrSegs = [{SegNo, ED}],
Error = {error, {segment, OkSegs, ErrSegs}},
Rep = wfr_mk_reply(V, TransId, Error, Extra),
Results2 = lists:keyreplace(TransId, 2, Results, Rep),
{TransIds2, Results2};
%% Another segment with error (transactionError)
{value, {V, TransId, {error, {segment, OkSegs, ErrSegs}}}} ->
OkSegs2 = lists:keysort(1, OkSegs),
ErrSegs2 = lists:keysort(1, [{SegNo, ED}|ErrSegs]),
Error = {error, {segment, OkSegs2, ErrSegs2}},
Rep = wfr_mk_reply(V, TransId, Error, Extra),
Results2 = lists:keyreplace(TransId, 2, Results, Rep),
{TransIds2, Results2};
false ->
%% First and only segment
OkSegs = [],
ErrSegs = [{SegNo, ED}],
Error = {error, {segment, OkSegs, ErrSegs}},
Rep = wfr_mk_reply(Version, TransId, Error, Extra),
{TransIds2, [Rep]}
end;
%% One segment of a reply
%% transactionResult "=" actionReplies
wfr_update(TransIds, TransId, Version, Results, {ok, {SegNo, _Last, ARs}}, Extra)
when is_integer(SegNo) ->
case lists:keysearch(TransId, 2, Results) of
%% All segments ok (actionReplies)
{value, {V, TransId, {ok, SegReps}}} ->
SegReps2 = [{SegNo, ARs}|SegReps],
Rep = wfr_mk_reply(V, TransId, {ok, SegReps2}, Extra),
Results2 = lists:keyreplace(TransId, 2, Results, Rep),
{TransIds, Results2};
%% Atleast one segment error (transactionError)
{value, {V, TransId, {error, {segment, OkSegs, ErrSegs}}}} ->
OkSegs2 = [{SegNo, ARs}|OkSegs],
Error = {error, {segment, OkSegs2, ErrSegs}},
Rep = wfr_mk_reply(V, TransId, Error, Extra),
Results2 = lists:keyreplace(TransId, 2, Results, Rep),
{TransIds, Results2};
false ->
%% First and only segment
Rep = wfr_mk_reply(Version, TransId, {ok, [{SegNo, ARs}]}, Extra),
{TransIds, [Rep | Results]}
end;
%% One segment of a reply
%% transactionResult "=" transactionError
wfr_update(TransIds, TransId, Version, Results, {error, {SegNo, _Last, ED}}, Extra)
when is_integer(SegNo) ->
case lists:keysearch(TransId, 2, Results) of
%% First segment with error (transactionError)
{value, {V, TransId, {ok, OkSegs}}} ->
ErrSegs = [{SegNo, ED}],
Error = {error, {segment, OkSegs, ErrSegs}},
Rep = wfr_mk_reply(V, TransId, Error, Extra),
Results2 = lists:keyreplace(TransId, 2, Results, Rep),
{TransIds, Results2};
%% Another segment with error (transactionError)
{value, {V, TransId, {error, {OkSegs, ErrSegs}}}} ->
ErrSegs2 = [{SegNo, ED}|ErrSegs],
Error = {error, {segment, OkSegs, ErrSegs2}},
Rep = wfr_mk_reply(V, TransId, Error, Extra),
Results2 = lists:keyreplace(TransId, 2, Results, Rep),
{TransIds, Results2};
false ->
%% First segment
OkSegs = [],
ErrSegs = [{SegNo, ED}],
Error = {error, {segment, OkSegs, ErrSegs}},
Rep = wfr_mk_reply(Version, TransId, Error, Extra),
{TransIds, [Rep]}
end;
%% This means that some segments did not make it in time
wfr_update(TransIds, TransId, Version, Results,
{error, {segment_timeout, Missing}}, Extra) ->
TransIds2 = lists:delete(TransId, TransIds),
case lists:keysearch(TransId, 2, Results) of
%% First segment with error (transactionError)
{value, {V, TransId, {ok, OkSegs}}} ->
Error = {error, {segment_timeout, Missing, OkSegs, []}},
Rep = wfr_mk_reply(V, TransId, Error, Extra),
Results2 = lists:keyreplace(TransId, 2, Results, Rep),
{TransIds2, Results2};
%% Another segment with error (transactionError)
{value, {V, TransId, {error, {segment, OkSegs, ErrSegs}}}} ->
Error = {error, {segment_timeout, Missing, OkSegs, ErrSegs}},
Rep = wfr_mk_reply(V, TransId, Error, Extra),
Results2 = lists:keyreplace(TransId, 2, Results, Rep),
{TransIds2, Results2};
false ->
%% First segment
Error = {error, {segment_timeout, Missing, [], []}},
Rep = wfr_mk_reply(Version, TransId, Error, Extra),
{TransIds2, [Rep]}
end;
%% And all other results (presumably results without segments).
wfr_update(TransIds, TransId, Version, Results, Result, Extra) ->
TransIds2 = lists:delete(TransId, TransIds),
Results2 = [wfr_mk_reply(Version, TransId, Result, Extra)|Results],
{TransIds2, Results2}.
%% TransInfo is either [trans_id()] or a [trans_req()]
%% This is the normal case where we have just one
%% transaction to be sent (using call or cast) using
%% the transaction sender process.
send_request(#conn_data{control_pid = CP,
trans_req = true,
trans_sender = Pid} = CD,
CH, [Serial], Action, [Bin])
when is_pid(Pid) andalso
is_integer(Serial) andalso
(node(CP) =:= node()) ->
?report_trace(CD,
"send_request - one transaction via trans-sender",
[Serial]),
#conn_data{request_timer = InitTimer,
long_request_timer = LongTimer} = CD,
TransId = to_local_trans_id(CH, Serial),
insert_request(CD, CH, TransId, Action, {Serial, Bin},
InitTimer, LongTimer),
megaco_trans_sender:send_req(Pid, Serial, Bin);
%% This is the general case where we have several transactions
%% beeing sent (using call or cast) at once using
%% the transaction sender process.
send_request(#conn_data{control_pid = CP,
trans_req = true,
trans_sender = Pid} = CD,
CH, TransInfo, Action, Bins)
when is_pid(Pid) andalso
is_list(Bins) andalso
(node(CP) =:= node()) ->
?report_trace(CD,
"send_request - multi transactions via trans_sender",
[TransInfo, Pid]),
#conn_data{request_timer = InitTimer,
long_request_timer = LongTimer} = CD,
insert_requests(CD, CH, TransInfo, Action, Bins,
InitTimer, LongTimer),
megaco_trans_sender:send_reqs(Pid, TransInfo, Bins);
%% This is the case when one or more transactions is
%% beeing sent in one message immediatelly (not using
%% the transaction sender process. E.g. the binary is
%% this encoded message.
send_request(#conn_data{control_pid = CP} = CD,
CH, TRs, Action, Bin)
when is_list(TRs) andalso
is_binary(Bin) andalso
(node(CP) =:= node()) ->
%% d("send_request -> entry with"
%% "~n TRs: ~p", [TRs]),
?report_trace(CD, "send_request - multi transaction", [TRs]),
#conn_data{request_timer = InitTimer,
long_request_timer = LongTimer} = CD,
insert_requests(CD, CH, TRs, Action, Bin,
InitTimer, LongTimer),
case megaco_messenger_misc:send_message(CD, false, Bin) of
{error, Reason} ->
cancel_requests(CD, TRs, Reason);
{ok, _} ->
ignore
end;
%% This is the case where we are not on the node where the
%% transport process run.
send_request(#conn_data{control_pid = CP} = CD,
CH, TransInfo, Action, Bin)
when node(CP) =/= node() ->
?report_trace(CD, "send_request - remote", [TransInfo]),
InitTimer = infinity,
LongTimer = infinity,
insert_requests(CD, CH, TransInfo, Action, Bin,
InitTimer, LongTimer),
Node = node(CP),
Args = [node(), CD, TransInfo, Bin],
rpc:cast(Node, ?MODULE, send_request_remote, Args).
insert_requests(_, _, [], _, _, _, _) ->
ok;
insert_requests(ConnData, ConnHandle, [Serial|Serials],
Action, [Bin|Bins], InitTimer, LongTimer)
when is_integer(Serial) andalso is_binary(Bin) ->
TransId = to_local_trans_id(ConnHandle, Serial),
insert_request(ConnData, ConnHandle,
TransId, Action, Bin, InitTimer, LongTimer),
insert_requests(ConnData, ConnHandle, Serials, Action, Bins,
InitTimer, LongTimer);
insert_requests(ConnData, ConnHandle,
[{transactionRequest, TR}|TRs],
Action, Bin, InitTimer, LongTimer)
when is_record(TR, 'TransactionRequest') andalso is_binary(Bin) ->
#'TransactionRequest'{transactionId = Serial} = TR,
TransId = to_local_trans_id(ConnHandle, Serial),
insert_request(ConnData, ConnHandle,
TransId, Action, TR, InitTimer, LongTimer),
insert_requests(ConnData, ConnHandle, TRs, Action, Bin,
InitTimer, LongTimer).
insert_request(ConnData, ConnHandle, TransId,
Action, Data, InitTimer, LongTimer) ->
#megaco_conn_handle{remote_mid = RemoteMid} = ConnHandle,
#conn_data{protocol_version = Version,
user_mod = UserMod,
user_args = UserArgs,
send_handle = SendHandle,
reply_data = ReplyData,
segment_recv_timer = InitSegTimer,
request_keep_alive_timeout = RKATimer} = ConnData,
{WaitFor, CurrTimer} = megaco_timer:init(InitTimer),
M = ?MODULE,
F = request_timeout,
A = [ConnHandle, TransId],
Ref = megaco_monitor:apply_after(M, F, A, WaitFor),
Req = #request{trans_id = TransId,
remote_mid = RemoteMid,
timer_ref = ?SIM({short, Ref}, init_request_timer),
init_timer = InitTimer,
init_long_timer = LongTimer,
curr_timer = CurrTimer,
version = Version,
bytes = {send, Data},
send_handle = SendHandle,
user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = ReplyData,
init_seg_timer = InitSegTimer,
keep_alive_timer = RKATimer},
megaco_monitor:insert_request(Req). % Timing problem?
send_request_remote(ReplyNode, ConnData, TransInfo, Bin) ->
Action = remote,
ConnHandle = ConnData#conn_data.conn_handle,
ConnData2 = ConnData#conn_data{reply_data = ReplyNode},
send_request(ConnData2, ConnHandle, TransInfo, Action, Bin).
prepare_req_send_options(CallOrCast, ConnHandle, Options, Actions) ->
%% Ensures that two processes cannot get same transaction id.
%% Bad send options may cause spurious transaction id to be consumed.
Incr = number_of_transactions(Actions),
case megaco_config:incr_trans_id_counter(ConnHandle, Incr) of
{ok, ConnData} ->
override_req_send_options(CallOrCast, ConnData, Options);
{error, Reason} ->
{error, Reason}
end.
number_of_transactions([Action|_]) when is_tuple(Action) ->
1;
number_of_transactions(ActionsList) ->
length(ActionsList).
override_req_send_options(ReplyAction, ConnData, [{Key, Val} | Tail]) ->
case Key of
protocol_version ->
ConnData2 = ConnData#conn_data{protocol_version = Val},
override_req_send_options(ReplyAction, ConnData2, Tail);
send_handle ->
ConnData2 = ConnData#conn_data{send_handle = Val},
override_req_send_options(ReplyAction, ConnData2, Tail);
request_timer ->
case megaco_config:verify_val(Key, Val) of
true ->
ConnData2 = ConnData#conn_data{request_timer = Val},
override_req_send_options(ReplyAction, ConnData2, Tail);
false ->
{error, {bad_send_option, {Key, Val}}}
end;
long_request_timer ->
case megaco_config:verify_val(Key, Val) of
true ->
ConnData2 = ConnData#conn_data{long_request_timer = Val},
override_req_send_options(ReplyAction, ConnData2, Tail);
false ->
{error, {bad_send_option, {Key, Val}}}
end;
call_proxy_gc_timeout when (ReplyAction =:= call) orelse
(ReplyAction =:= any) ->
case megaco_config:verify_val(Key, Val) of
true ->
ConnData2 =
ConnData#conn_data{call_proxy_gc_timeout = Val},
override_req_send_options(ReplyAction, ConnData2, Tail);
false ->
{error, {bad_send_option, {Key, Val}}}
end;
request_keep_alive_timeout when (ReplyAction =:= cast) orelse
(ReplyAction =:= any) ->
case megaco_config:verify_val(Key, Val) of
true ->
ConnData2 =
ConnData#conn_data{request_keep_alive_timeout = Val},
override_req_send_options(ReplyAction, ConnData2, Tail);
false ->
{error, {bad_send_option, {Key, Val}}}
end;
reply_data ->
ConnData2 = ConnData#conn_data{reply_data = Val},
override_req_send_options(ReplyAction, ConnData2, Tail);
user_mod when is_atom(Val) ->
ConnData2 = ConnData#conn_data{user_mod = Val},
override_req_send_options(ReplyAction, ConnData2, Tail);
user_args when is_list(Val) ->
ConnData2 = ConnData#conn_data{user_args = Val},
override_req_send_options(ReplyAction, ConnData2, Tail);
trans_req when Val =:= false ->
%% We only allow turning the transaction-sender off, since
%% the opposite (turning it on) would causing to much headake...
%% This will allow not using the transaction sender for
%% occasional messages
ConnData2 = ConnData#conn_data{trans_req = Val,
trans_sender = undefined},
override_req_send_options(ReplyAction, ConnData2, Tail);
_Bad ->
{error, {bad_send_option, {Key, Val}}}
end;
override_req_send_options(_ReplyAction, ConnData, []) ->
{ok, ConnData}.
override_rep_send_options(ConnData, [{Key, Val} | Tail]) ->
case Key of
protocol_version ->
ConnData2 = ConnData#conn_data{protocol_version = Val},
override_rep_send_options(ConnData2, Tail);
send_handle ->
ConnData2 = ConnData#conn_data{send_handle = Val},
override_rep_send_options(ConnData2, Tail);
reply_timer ->
case megaco_config:verify_val(Key, Val) of
true ->
ConnData2 = ConnData#conn_data{reply_timer = Val},
override_rep_send_options(ConnData2, Tail);
false ->
{error, {bad_send_option, {Key, Val}}}
end;
trans_req when Val =:= false ->
%% We only allow turning the transaction-sender off, since
%% the opposite (turning it on) would causing to much headake...
%% This will allow not using the transaction sender for
%% occasional messages
ConnData2 = ConnData#conn_data{trans_req = Val,
trans_sender = undefined},
override_rep_send_options(ConnData2, Tail);
_Bad ->
{error, {bad_send_option, {Key, Val}}}
end;
override_rep_send_options(ConnData, []) ->
{ok, ConnData}.
%% ----
%% This list is allways atleast one (list of actions) long.
%% ----
%% The proper number of transaction id numbers has already
%% been "allocated", and the connection data record is
%% updated accordingly.
encode_requests(#conn_data{trans_req = true,
trans_sender = Pid,
serial = LastSerial} = CD, ActionsList)
when is_pid(Pid) ->
(catch encode_requests(CD, LastSerial,
lists:reverse(ActionsList), [], []));
encode_requests(#conn_data{serial = LastSerial} = CD, ActionsList) ->
%% We shall not accumulate transactions.
%% This means that we shall not encode
%% the transactions individually (and send
%% them to the sender process, which
%% accumulate transactions for later sending),
%% Instead we encode the entire message directly.
%% => We shall return one binary, containing,
%% possibly, many transactions
encode_requests_in_msg(CD, LastSerial, lists:reverse(ActionsList)).
%% This means that we shall compose and encode one complete
%% megaco message, containing one or more transactions.
encode_requests_in_msg(CD, LastSerial, ActionsList) ->
TRs = compose_requests_in_msg(LastSerial, ActionsList, []),
Body = {transactions, TRs},
Res = megaco_messenger_misc:encode_body(CD,
"encode trans request(s) msg",
Body),
case Res of
{ok, Bin} ->
{ok, TRs, Bin};
Error ->
Error
end.
compose_requests_in_msg(_S, [], TRs) ->
TRs;
compose_requests_in_msg(Serial, [A|As], Acc) ->
TR = #'TransactionRequest'{transactionId = Serial,
actions = A},
compose_requests_in_msg(Serial - 1, As, [{transactionRequest, TR}|Acc]).
%% We have done the encoding in reverse order, so there
%% is no need to reverse now.
encode_requests(_, _, [], Serials, EncodedTRs) ->
{ok, Serials, EncodedTRs};
encode_requests(CD, Serial, [Actions|ActionsList], Serials, EncodedTRs) ->
case do_encode_request(CD, Serial, Actions) of
{ok, Bin} ->
encode_requests(CD, Serial - 1, ActionsList,
[Serial|Serials], [Bin|EncodedTRs]);
Error ->
throw(Error)
end.
do_encode_request(CD, Serial, Actions) ->
TR = #'TransactionRequest'{transactionId = Serial,
actions = Actions},
megaco_messenger_misc:encode_trans_request(CD, TR).
imm_ack_req(Counter, when_pending_sent) when (Counter > 0) -> 'NULL';
imm_ack_req(_Counter, when_pending_sent) -> asn1_NOVALUE;
imm_ack_req(_Counter, ImmAck) -> ImmAck.
maybe_send_reply(#conn_data{sent_pending_limit = Limit} = ConnData,
TransId, Result, SendOpts, ImmAck) ->
%% d("maybe_send_reply -> entry with"
%% "~n Limit: ~p"
%% "~n TransId: ~p"
%% "~n Result: ~p"
%% "~n SendOpts: ~p"
%% "~n ImmAck: ~p", [Limit, TransId, Result, SendOpts, ImmAck]),
%% Pending limit
%% Before we can send the reply we must check that we have
%% not passed the pending limit (and sent an error message).
case check_pending_limit(Limit, sent, TransId) of
{ok, Counter} ->
case override_rep_send_options(ConnData, SendOpts) of
{ok, ConnData2} ->
send_reply(ConnData2, Result,
imm_ack_req(Counter, ImmAck));
Error ->
Error
end;
aborted ->
{error, aborted}
end.
encode_reply(CD, TR) ->
megaco_messenger_misc:encode_trans_reply(CD, TR).
send_reply(#conn_data{serial = Serial,
trans_req = TransReq,
trans_sender = TransSnd} = CD, TransRes, ImmAck) ->
%% Encapsule the transaction result into a reply message
%% d("send_reply -> entry with"
%% "~n Serial: ~p"
%% "~n TransRes: ~p"
%% "~n ImmAck: ~p", [Serial, TransRes, ImmAck]),
TR = #megaco_transaction_reply{transactionId = Serial,
immAckRequired = ImmAck,
transactionResult = TransRes},
case encode_reply(CD, TR) of
{ok, Bin} when is_binary(Bin) andalso (TransReq =:= true) ->
?rt2("send_reply - pass it on to the transaction sender",
[size(Bin)]),
megaco_trans_sender:send_reply(TransSnd, Bin),
{ok, Bin};
{ok, Bin} when is_binary(Bin) ->
?rt2("send_reply - encoded", [size(Bin)]),
TraceLabel = "send trans reply",
Body = {transactions, [Bin]},
megaco_messenger_misc:send_body(CD, TraceLabel, Body);
{ok, Bins} when is_list(Bins) ->
?rt2("send_reply - encoded (segmented)", [length(Bins)]),
Res = send_reply_segments(CD, Bins),
{ok, Res};
{error, not_implemented} ->
%% Oups, we cannot segment regardless the config,
%% so pack it all into one message and hope for
%% the best...
?rt2("send_reply - cannot encode separate transactions", []),
TR2 = megaco_messenger_misc:transform_transaction_reply(CD, TR),
Body = {transactions, [{transactionReply, TR2}]},
megaco_messenger_misc:send_body(CD, "encode trans reply", Body);
{error, Reason} = Error ->
Code = ?megaco_internal_gateway_error,
Text = "encode transaction reply",
ED = #'ErrorDescriptor'{errorCode = Code,
errorText = Text},
Res = {transactionError, ED},
TR2 = #megaco_transaction_reply{transactionId = Serial,
transactionResult = Res},
TR3 = megaco_messenger_misc:transform_transaction_reply(CD, TR2),
TraceLabel = "<ERROR> encode trans reply body failed",
?report_important(CD, TraceLabel, [TR, TR3, ED, Error]),
error_msg("failed encoding transaction reply body: ~s",
[format_encode_error_reason(Reason)]),
Body = {transactions, [{transactionReply, TR3}]},
megaco_messenger_misc:send_body(CD, TraceLabel, Body),
Error
end.
send_reply_segments(CD, Bins) ->
TraceLabelPre = "send segmented trans reply",
(catch send_reply_segments(CD, TraceLabelPre, Bins)).
send_reply_segments(#conn_data{segment_send = infinity} = CD, Label, Bins) ->
send_reply_segments(CD, Label, length(Bins), Bins);
send_reply_segments(#conn_data{segment_send = K} = CD, Label, Bins)
when is_integer(K) andalso (K =< length(Bins)) ->
send_reply_segments(CD, Label, K, Bins);
send_reply_segments(#conn_data{segment_send = K} = CD, Label, Bins)
when is_integer(K) ->
send_reply_segments(CD, Label, length(Bins), Bins).
send_reply_segments(CD, Label, K, Bins) ->
send_reply_segments(CD, Label, K, Bins, []).
send_reply_segments(_CD, _Label, 0, Bins, Sent) ->
?rt2("send_reply_segments - done", [Sent, Bins]),
{Sent, Bins};
send_reply_segments(CD, TraceLabelPre, K, [{SN, Bin}|Bins], Sent) ->
case send_reply_segment(CD, TraceLabelPre, SN, Bin) of
{ok, Bin2} ->
?rt2("send_reply_segments - send", [K, SN]),
send_reply_segments(CD, TraceLabelPre, K-1,
Bins, [{SN, Bin2}|Sent]);
Error ->
throw(Error)
end.
send_reply_segment(CD, TraceLabelPre, SN, Bin) ->
Label = lists:flatten(io_lib:format("~s[~w]", [TraceLabelPre, SN])),
Body = {transactions, [Bin]},
megaco_messenger_misc:send_body(CD, Label, Body).
format_encode_error_reason(Reason) ->
FS =
case Reason of
{Mod, Func, [EC, Msg], {AE, CS}} when is_atom(Mod) andalso
is_atom(Func) andalso
is_list(EC) and
is_tuple(Msg) and
is_list(CS) ->
io_lib:format("~n Encode module: ~w"
"~n Func: ~w"
"~n Encode config: ~w"
"~n Message part: ~p"
"~n Actual error: ~p"
"~n Call stack: ~w",
[Mod, Func, EC, Msg, AE, CS]);
{Mod, Func, [EC, Msg], AE} when is_atom(Mod) andalso
is_atom(Func) andalso
is_list(EC) andalso
is_tuple(Msg) ->
io_lib:format("~n Encode module: ~w"
"~n Func: ~w"
"~n Encode config: ~w"
"~n Message part: ~p"
"~n Actual error: ~p",
[Mod, Func, EC, Msg, AE]);
{Mod, [EC, Msg], {AE, CS}} when is_atom(Mod) andalso
is_list(EC) andalso
is_tuple(Msg) andalso
is_list(CS) ->
io_lib:format("~n Encode module: ~w"
"~n Encode config: ~w"
"~n Message part: ~p"
"~n Actual error: ~p"
"~n Call stack: ~w",
[Mod, EC, Msg, AE, CS]);
{Mod, [EC, Msg], AE} when is_atom(Mod) andalso
is_list(EC) andalso
is_tuple(Msg) ->
io_lib:format("~n Encode module: ~w"
"~n Encode config: ~w"
"~n Message part: ~p"
"~n Actual error: ~p",
[Mod, EC, Msg, AE]);
Error ->
io_lib:format("~n ~w", [Error])
end,
lists:flatten(FS).
%% Presumably the user would return immediately (with {pending, Data}) if it
%% knows or suspects a request to take a long time to process.
%% For this reason we assume that handling a resent request
%% could not have caused an update of the pending limit counter.
maybe_send_pending(#conn_data{sent_pending_limit = Limit} = ConnData,
TransId) ->
case check_and_maybe_incr_pending_limit(Limit, sent, TransId) of
ok ->
send_pending(ConnData);
error ->
SendReply = send_pending_limit_error(ConnData),
{aborted, SendReply};
aborted ->
{aborted, ignore}
end.
send_pending(#conn_data{serial = Serial,
trans_req = true,
trans_sender = Pid}) ->
megaco_trans_sender:send_pending(Pid, Serial);
send_pending(#conn_data{serial = Serial} = CD) ->
%% Encapsule the transaction result into a pending message
TP = #'TransactionPending'{transactionId = Serial},
Body = {transactions, [{transactionPending, TP}]},
megaco_messenger_misc:send_body(CD, "send trans pending", Body).
maybe_send_ack('NULL', #conn_data{serial = Serial,
trans_ack = true,
trans_sender = Pid}) ->
megaco_trans_sender:send_ack_now(Pid, Serial);
maybe_send_ack('NULL', CD) ->
send_ack(CD);
maybe_send_ack(_, #conn_data{auto_ack = false}) ->
ignore;
maybe_send_ack(_, #conn_data{serial = Serial,
trans_ack = true,
trans_sender = Pid})
when is_pid(Pid) ->
%% Send (later) via the transaction sender
megaco_trans_sender:send_ack(Pid, Serial),
ok;
maybe_send_ack(_, CD) ->
%% Send now
send_ack(CD).
send_ack(#conn_data{serial = Serial} = CD) ->
%% Encapsule the transaction result into a ack message
TRA = #'TransactionAck'{firstAck = Serial},
Body = {transactions, [{transactionResponseAck, [TRA]}]},
megaco_messenger_misc:send_body(CD, "send trans ack", Body).
send_segment_reply(#conn_data{serial = Serial} = CD, SegNo) ->
SR = #'SegmentReply'{transactionId = Serial,
segmentNumber = SegNo},
Body = {transactions, [{segmentReply, SR}]},
megaco_messenger_misc:send_body(CD, "send segment reply", Body).
send_segment_reply(#conn_data{serial = Serial} = CD, SegNo, Complete) ->
SR = #'SegmentReply'{transactionId = Serial,
segmentNumber = SegNo,
segmentationComplete = Complete},
Body = {transactions, [{segmentReply, SR}]},
megaco_messenger_misc:send_body(CD, "send segment reply", Body).
send_segment_reply_complete(CD, SegNo) ->
send_segment_reply(CD, SegNo, 'NULL').
send_pending_limit_error(ConnData) ->
?report_pending_limit_exceeded(ConnData),
Code = ?megaco_number_of_transactionpending_exceeded,
Reason = "Pending limit exceeded",
send_trans_error(ConnData, Code, Reason).
send_trans_error(ConnData, Code, Reason) ->
%% Encapsulate the transaction error into a reply message
ED = #'ErrorDescriptor'{errorCode = Code, errorText = Reason},
Serial = ConnData#conn_data.serial,
%% Version = ConnData#conn_data.protocol_version,
TransRes = {transactionError, ED},
TR = #megaco_transaction_reply{transactionId = Serial,
transactionResult = TransRes},
TR2 = megaco_messenger_misc:transform_transaction_reply(ConnData, TR),
Body = {transactions, [{transactionReply, TR2}]},
case megaco_messenger_misc:send_body(ConnData, "send trans error", Body) of
{error, Reason2} ->
?report_important(ConnData,
"<ERROR> failed sending transaction error",
[Body, {error, Reason2}]),
error;
_ ->
ok
end.
send_message_error(ConnData, Code, Reason) ->
ED = #'ErrorDescriptor'{errorCode = Code, errorText = Reason},
Body = {messageError, ED},
case megaco_messenger_misc:send_body(ConnData, "send trans error", Body) of
{error, Reason2} ->
?report_important(ConnData,
"<ERROR> failed sending message error",
[Body, {error, Reason2}]),
error;
_ ->
ok
end.
cancel(ConnHandle, Reason) when is_record(ConnHandle, megaco_conn_handle) ->
case megaco_config:lookup_local_conn(ConnHandle) of
[CD] ->
megaco_config:update_conn_info(CD, cancel, true),
do_cancel(ConnHandle, Reason, CD#conn_data{cancel = true}),
megaco_config:update_conn_info(CD, cancel, false),
ok;
[] ->
ConnData = fake_conn_data(ConnHandle),
do_cancel(ConnHandle, Reason, ConnData)
end.
do_cancel(ConnHandle, Reason, ConnData) ->
?report_trace(ConnData, "cancel", [ConnHandle, Reason]),
LocalMid = ConnHandle#megaco_conn_handle.local_mid,
RemoteMid = ConnHandle#megaco_conn_handle.remote_mid,
ReqTransIdPat = #trans_id{mid = LocalMid, _ = '_'},
ReqPat = #request{trans_id = ReqTransIdPat,
remote_mid = RemoteMid,
_ = '_'},
CancelReq = fun(Req) ->
cancel_request(ConnData, Req, Reason),
{_Type, Ref} = Req#request.timer_ref, %% OTP-4843
megaco_monitor:cancel_apply_after(Ref)
end,
Requests = megaco_monitor:match_requests(ReqPat),
lists:foreach(CancelReq, Requests),
RemoteMid = ConnHandle#megaco_conn_handle.remote_mid,
RepTransIdPat = #trans_id{mid = RemoteMid, _ = '_'}, % BUGBUG List here?
RepPat = #reply{trans_id = RepTransIdPat,
local_mid = LocalMid,
_ = '_'},
CancelRep = fun(Rep) ->
cancel_reply(ConnData, Rep, Reason)
end,
Replies = megaco_monitor:match_replies(RepPat),
lists:foreach(CancelRep, Replies),
ok.
cancel_requests(_ConnData, [], _Reason) ->
ok;
cancel_requests(ConnData, [{transactionRequest,TR}|TRs], Reason) ->
#'TransactionRequest'{transactionId = TransId0} = TR,
TransId = to_local_trans_id(ConnData#conn_data.conn_handle, TransId0),
case megaco_monitor:lookup_request(TransId) of
[] ->
ignore;
[Req] when is_record(Req, request) ->
cancel_request(ConnData, Req, Reason)
end,
cancel_requests(ConnData, TRs, Reason).
cancel_request(ConnData, Req, Reason) ->
?report_trace(ignore, "cancel request", [Req]),
?TC_AWAIT_CANCEL_EVENT(),
TransId = Req#request.trans_id,
Version = Req#request.version,
UserMod = Req#request.user_mod,
UserArgs = Req#request.user_args,
Action = Req#request.reply_action,
UserData = Req#request.reply_data,
UserReply = {error, Reason},
ConnData2 = ConnData#conn_data{protocol_version = Version,
user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
cancel_request2(ConnData2, TransId, UserReply).
cancel_request2(ConnData, TransId, UserReply) ->
megaco_monitor:delete_request(TransId),
megaco_config:del_pending_counter(recv, TransId), % OTP-7189
Serial = TransId#trans_id.serial,
ConnData2 = ConnData#conn_data{serial = Serial},
return_reply(ConnData2, TransId, UserReply).
return_reply(ConnData, TransId, UserReply) ->
Extra = ?default_user_callback_extra,
return_reply(ConnData, TransId, UserReply, Extra).
return_reply(ConnData, TransId, UserReply, Extra) ->
?report_trace(ConnData, "callback: trans reply", [UserReply]),
Version = ConnData#conn_data.protocol_version,
UserData = ConnData#conn_data.reply_data,
case ConnData#conn_data.reply_action of
call when is_pid(UserData) ->
?report_trace(ConnData, "callback: (call) trans reply",
[UserReply]),
Pid = UserData,
Pid ! {?MODULE, TransId, Version, UserReply, Extra};
cast ->
?report_trace(ConnData, "callback: (cast) trans reply", [UserReply]),
UserMod = ConnData#conn_data.user_mod,
UserArgs = ConnData#conn_data.user_args,
ConnHandle = ConnData#conn_data.conn_handle,
Args =
case Extra of
?default_user_callback_extra ->
[ConnHandle, Version, UserReply, UserData | UserArgs];
_ ->
[ConnHandle, Version, UserReply, UserData, Extra | UserArgs]
end,
Res = (catch apply(UserMod, handle_trans_reply, Args)),
?report_debug(ConnData, "return: (cast) trans reply",
[UserReply, {return, Res}]),
case Res of
ok ->
ok;
_ ->
warning_msg("transaction reply callback failed: ~w",
[Res]),
ok
end,
Res;
remote ->
?report_trace(ConnData, "callback: (remote) trans reply", [UserReply]),
Node = UserData,
Args = [ConnData, UserReply, Extra],
rpc:cast(Node, ?MODULE, receive_reply_remote, Args)
end.
receive_reply_remote(ConnData, UserReply) ->
Extra = ?default_user_callback_extra,
receive_reply_remote(ConnData, UserReply, Extra).
receive_reply_remote(ConnData, UserReply, Extra) ->
TransId = to_local_trans_id(ConnData),
case (catch megaco_monitor:lookup_request(TransId)) of
[#request{timer_ref = {_Type, Ref}} = Req] -> %% OTP-4843
%% Don't care about Req and Rep version diff
megaco_monitor:delete_request(TransId),
megaco_monitor:cancel_apply_after(Ref), % OTP-4843
megaco_config:del_pending_counter(recv, TransId), % OTP-7189
UserMod = Req#request.user_mod,
UserArgs = Req#request.user_args,
Action = Req#request.reply_action,
UserData = Req#request.reply_data,
ConnData2 = ConnData#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(ConnData2, TransId, UserReply, Extra);
_ ->
?report_trace(ConnData, "remote reply (no receiver)",
[UserReply]),
return_unexpected_trans_reply(ConnData, TransId, UserReply, Extra)
end.
cancel_reply(ConnData, #reply{state = waiting_for_ack,
user_mod = UserMod,
user_args = UserArgs} = Rep, Reason) ->
?report_trace(ignore, "cancel reply [waiting_for_ack]", [Rep]),
megaco_monitor:cancel_apply_after(Rep#reply.pending_timer_ref),
Serial = (Rep#reply.trans_id)#trans_id.serial,
ConnData2 = ConnData#conn_data{serial = Serial,
user_mod = UserMod,
user_args = UserArgs},
T = #'TransactionAck'{firstAck = Serial},
Extra = ?default_user_callback_extra,
handle_ack(ConnData2, {error, Reason}, Rep, T, Extra);
cancel_reply(_ConnData, #reply{state = aborted} = Rep, _Reason) ->
?report_trace(ignore, "cancel reply [aborted]", [Rep]),
#reply{trans_id = TransId,
timer_ref = ReplyRef,
pending_timer_ref = PendingRef} = Rep,
megaco_monitor:delete_reply(TransId),
megaco_monitor:cancel_apply_after(ReplyRef),
megaco_monitor:cancel_apply_after(PendingRef), % Still running?
megaco_config:del_pending_counter(sent, TransId), % Still existing?
ok;
cancel_reply(_ConnData, Rep, ignore) ->
?report_trace(ignore, "cancel reply [ignore]", [Rep]),
#reply{trans_id = TransId,
timer_ref = ReplyRef,
pending_timer_ref = PendingRef} = Rep,
megaco_monitor:delete_reply(TransId),
megaco_monitor:cancel_apply_after(ReplyRef),
megaco_monitor:cancel_apply_after(PendingRef), % Still running?
megaco_config:del_pending_counter(sent, TransId), % Still existing?
ok;
cancel_reply(_CD, _Rep, _Reason) ->
ok.
request_keep_alive_timeout(ConnHandle, TransId) ->
megaco_config:del_pending_counter(ConnHandle, TransId),
megaco_monitor:lookup_request(TransId),
ok.
request_timeout(ConnHandle, TransId) ->
?rt1(ConnHandle, "request timeout", [TransId]),
case megaco_monitor:lookup_request(TransId) of
[] ->
request_not_found_ignore;
[Req] when is_record(Req, request) ->
case megaco_config:lookup_local_conn(ConnHandle) of
[CD] when (CD#conn_data.cancel =:= true) ->
cancel_in_progress_ignore;
[CD] ->
incNumTimerRecovery(ConnHandle),
do_request_timeout(ConnHandle, TransId, CD, Req);
[] when ConnHandle#megaco_conn_handle.remote_mid =:= preliminary_mid ->
%% There are two possibillities:
%% 1) The connection has just been upgraded from a
%% preliminary to a real connection. So this timeout
%% is just a glitch. E.g. between the removel of this
%% ConnHandle and the timer.
%% 2) The first message sent, the service-change, got no
%% reply (UDP without three-way-handshake).
%% And then the other side (MGC) sends a request,
%% which causes an auto-upgrade
request_timeout_upgraded(ConnHandle, Req);
[] ->
incNumTimerRecovery(ConnHandle),
ConnData = fake_conn_data(ConnHandle),
do_request_timeout(ConnHandle, TransId, ConnData, Req)
end
end.
request_timeout_upgraded(ConnHandle, Req) ->
CD = fake_conn_data(ConnHandle),
cancel_request(CD, Req, timeout).
do_request_timeout(ConnHandle, TransId, ConnData,
#request{curr_timer = CurrTimer} = Req) ->
?rt1(ConnHandle, "process request timeout", [TransId, CurrTimer]),
SendHandle = Req#request.send_handle,
Version = Req#request.version,
ConnData2 = ConnData#conn_data{send_handle = SendHandle,
protocol_version = Version},
case CurrTimer of
timeout -> %%%%%%%
cancel_request(ConnData2, Req, timeout),
timeout1;
%% Restartable timer
%% (max_retries = infinity_restartable)
{_, timeout} ->
cancel_request(ConnData2, Req, timeout),
timeout2;
Timer ->
{SendOrNoSend, Data} = Req#request.bytes,
case SendOrNoSend of
send ->
case maybe_encode(ConnData2, Data) of
{ok, Bin} ->
?report_trace(ConnData2, "re-send trans request",
[{bytes, Bin}]),
case maybe_send_message(ConnData2, true, Bin) of
ok ->
sent1_ignore;
{ok, _} ->
sent2_ignore;
{error, Reason} ->
?report_important(ConnData2,
"<ERROR> "
"re-send trans "
"request failed",
[{bytes, Bin},
{error, Reason}])
end;
{error, Reason} ->
%% Since it was possible to encode the original
%% message this should really never happen...
?report_important(ConnData2,
"<ERROR> "
"re-send trans request failed",
[{transaction,
Req#request.bytes},
{error, Reason}])
end;
no_send ->
not_sent_ok
end,
{WaitFor, Timer2} = megaco_timer:restart(Timer),
OptBin = opt_garb_binary(Timer2, Data),
{Type, _} = Req#request.timer_ref,
M = ?MODULE,
F = request_timeout,
A = [ConnHandle, TransId],
Ref2 = megaco_monitor:apply_after(M, F, A, WaitFor),
NewFields =
[{#request.bytes, {SendOrNoSend, OptBin}},
{#request.timer_ref, {Type, Ref2}},
{#request.curr_timer, Timer2}],
megaco_monitor:update_request_fields(TransId, NewFields), % Timing problem
{restarted, WaitFor, Timer2}
end.
maybe_encode(#conn_data{trans_req = false} = CD, {_Serial, Bin})
when is_binary(Bin) ->
Body = {transactions, [{transactionRequest, Bin}]},
megaco_messenger_misc:encode_body(CD, "encode trans request msg", Body);
maybe_encode(_CD, {_Serial, Bin} = D) when is_binary(Bin) ->
{ok, D};
maybe_encode(#conn_data{trans_req = true,
trans_sender = Pid} = CD,
#'TransactionRequest'{transactionId = Serial} = TR)
when is_pid(Pid) ->
case megaco_messenger_misc:encode_trans_request(CD, TR) of
{ok, Bin} ->
{ok, {Serial, Bin}};
Error ->
Error
end;
maybe_encode(CD, TR)
when is_record(TR, 'TransactionRequest') ->
Body = {transactions, [{transactionRequest, TR}]},
megaco_messenger_misc:encode_body(CD, "encode trans request msg", Body);
maybe_encode(_CD, Trash) ->
{error, {invalid_bin, Trash}}.
maybe_send_message(CD, Resend, Bin) when is_binary(Bin) ->
megaco_messenger_misc:send_message(CD, Resend, Bin);
maybe_send_message(#conn_data{trans_sender = Pid}, _Resend, {Serial, Bin})
when is_pid(Pid) andalso is_integer(Serial) andalso is_binary(Bin) ->
megaco_trans_sender:send_req(Pid, Serial, Bin).
reply_timeout(ConnHandle, TransId, timeout) ->
handle_reply_timer_timeout(ConnHandle, TransId);
%% This means that infinity_restartable was used for max_retries.
%% There is currently no reason to use this for the reply_timeout,
%% since there is no external event to restart the timer!
reply_timeout(ConnHandle, TransId, {_, timeout}) ->
handle_reply_timer_timeout(ConnHandle, TransId);
reply_timeout(ConnHandle, TransId, Timer) ->
?report_trace(ConnHandle, "reply timeout", [Timer, TransId]),
case lookup_reply(undefined, TransId) of
[] ->
reply_not_found_ignore;
{Converted,
#reply{state = waiting_for_ack,
ack_action = {handle_ack, _}} = Rep} ->
case megaco_config:lookup_local_conn(ConnHandle) of
[CD] when (CD#conn_data.cancel =:= true) ->
cancel_in_progress_ignore;
[CD] when (Converted =:= true) ->
incNumTimerRecovery(ConnHandle),
%% When we did the reply record lookup, we had no
%% conn_data record, and the reply record was
%% converted. This means that the reply record
%% has no valid info about user_mod or user_args.
%% Therefor, the user_mod and user_args of the
%% conn_data record is better then nothing.
#conn_data{user_mod = UserMod,
user_args = UserArgs} = CD,
Rep2 = Rep#reply{user_mod = UserMod,
user_args = UserArgs},
do_reply_timeout(ConnHandle, TransId, CD, Timer, Rep2);
[CD] when (Converted =:= false) ->
incNumTimerRecovery(ConnHandle),
do_reply_timeout(ConnHandle, TransId, CD, Timer, Rep);
[] ->
incNumTimerRecovery(ConnHandle),
CD = fake_conn_data(ConnHandle),
do_reply_timeout(ConnHandle, TransId, CD, Timer, Rep)
end;
{Converted,
#reply{state = waiting_for_ack,
bytes = Sent} = Rep} when is_list(Sent) ->
case megaco_config:lookup_local_conn(ConnHandle) of
[ConnData] when (Converted =:= true) ->
incNumTimerRecovery(ConnHandle),
%% When we did the reply record lookup, we had no
%% conn_data record, and the reply record was
%% converted. This means that the reply record
%% has no valid info about user_mod or user_args.
%% Therefor, the user_mod and user_args of the
%% conn_data record is better then nothing.
#conn_data{user_mod = UserMod,
user_args = UserArgs} = ConnData,
Rep2 = Rep#reply{user_mod = UserMod,
user_args = UserArgs},
do_reply_timeout(ConnHandle, TransId, ConnData,
Timer, Rep2);
[ConnData] when (Converted =:= false) ->
incNumTimerRecovery(ConnHandle),
do_reply_timeout(ConnHandle, TransId, ConnData,
Timer, Rep);
[] ->
incNumTimerRecovery(ConnHandle),
ConnData = fake_conn_data(ConnHandle),
do_reply_timeout(ConnHandle, TransId, ConnData,
Timer, Rep)
end;
{_Converted,
#reply{state = waiting_for_ack} = Rep} ->
do_reply_timeout(ConnHandle, TransId, Timer, Rep);
{_Converted,
#reply{state = aborted} = Rep} ->
do_reply_timeout(ConnHandle, TransId, Timer, Rep);
_ ->
ignore
end.
do_reply_timeout(ConnHandle, TransId, ConnData, Timer,
#reply{send_handle = SH,
version = V,
bytes = Bytes} = Rep) when is_binary(Bytes) ->
%% d("do_reply_timeout -> entry with"
%% "~n ConnHandle: ~p"
%% "~n TransId: ~p"
%% "~n Timer: ~p"
%% "~n Rep: ~p"
%% "~n", [ConnHandle, TransId, Timer, Rep]),
CD = ConnData#conn_data{send_handle = SH,
protocol_version = V},
?rt1(CD, "re-send trans reply", [{bytes, Bytes}]),
case megaco_messenger_misc:send_message(CD, true, Bytes) of
{ok, _} ->
ignore;
{error, Reason} ->
?report_important(CD, "<ERROR> re-send trans reply failed",
[{bytes, Bytes}, {error, Reason}])
end,
do_reply_timeout(ConnHandle, TransId, Timer, Rep);
do_reply_timeout(ConnHandle, TransId, ConnData, Timer,
#reply{send_handle = SH,
version = V,
bytes = Sent} = Rep) when is_list(Sent) ->
%% d("do_reply_timeout -> entry with"
%% "~n ConnHandle: ~p"
%% "~n TransId: ~p"
%% "~n Timer: ~p"
%% "~n Rep: ~p"
%% "~n", [ConnHandle, TransId, Timer, Rep]),
CD = ConnData#conn_data{send_handle = SH,
protocol_version = V},
ReSend =
fun({SN, Bytes}) ->
?rt1(CD, "re-send segmented trans reply",
[{segment_no, SN}, {bytes, Bytes}]),
case megaco_messenger_misc:send_message(CD, true, Bytes) of
%% ok ->
%% ignore;
{ok, _} ->
ignore;
{error, Reason} ->
?report_important(CD,
"<ERROR> re-send segmented "
"trans reply failed",
[{segment_no, SN},
{bytes, Bytes},
{error, Reason}])
end
end,
lists:foreach(ReSend, Sent),
do_reply_timeout(ConnHandle, TransId, Timer, Rep).
do_reply_timeout(ConnHandle, TransId, Timer, #reply{bytes = Bytes}) ->
{WaitFor, Timer2} = megaco_timer:restart(Timer),
OptBin = case Bytes of
Bin when is_binary(Bin) ->
opt_garb_binary(Timer2, Bin);
Sent when is_list(Sent) ->
Garb = fun(Bin) -> opt_garb_binary(Timer2, Bin) end,
[{SN, Garb(Bin)} || {SN, Bin} <- Sent]
end,
M = ?MODULE,
F = reply_timeout,
A = [ConnHandle, TransId, Timer2],
Ref2 = megaco_monitor:apply_after(M, F, A, WaitFor),
NewFields =
[{#reply.bytes, OptBin},
{#reply.timer_ref, Ref2}],
megaco_monitor:update_reply_fields(TransId, NewFields), % Timing problem?
{restarted, WaitFor, Timer2}.
handle_reply_timer_timeout(ConnHandle, TransId) ->
?report_trace(ConnHandle, "handle reply timeout", [timeout, TransId]),
incNumTimerRecovery(ConnHandle),
%% OTP-4378
case lookup_reply(undefined, TransId) of
{Converted,
#reply{state = waiting_for_ack} = Rep} ->
Serial = (Rep#reply.trans_id)#trans_id.serial,
{Rep2, ConnData} =
case megaco_config:lookup_local_conn(ConnHandle) of
[ConnData0] when (Converted =:= false) ->
#reply{user_mod = UserMod,
user_args = UserArgs} = Rep,
{Rep,
ConnData0#conn_data{user_mod = UserMod,
user_args = UserArgs}};
[ConnData0] when (Converted =:= true) ->
{Rep#reply{user_mod = ConnData0#conn_data.user_mod,
user_args = ConnData0#conn_data.user_args},
ConnData0};
[] when (Converted =:= false) ->
ConnData0 = fake_conn_data(ConnHandle),
#reply{user_mod = UserMod,
user_args = UserArgs} = Rep,
{Rep,
ConnData0#conn_data{user_mod = UserMod,
user_args = UserArgs}};
[] when (Converted =:= true) ->
%% We have no valid info about user_mod and user_args
{Rep, fake_conn_data(ConnHandle)}
end,
ConnData2 = ConnData#conn_data{serial = Serial},
T = #'TransactionAck'{firstAck = Serial},
Extra = ?default_user_callback_extra,
handle_ack(ConnData2, {error, timeout}, Rep2, T, Extra);
{_Converted,
#reply{pending_timer_ref = Ref, % aborted?
bytes = SegSent}} -> % may be a binary
megaco_monitor:cancel_apply_after(Ref),
cancel_segment_timers(SegSent),
megaco_monitor:delete_reply(TransId),
megaco_config:del_pending_counter(sent, TransId);
[] ->
ignore_reply_removed
end.
%% segment_reply_timeout(ConnHandle, TransId, SN, timeout) ->
%% ?report_trace(ConnHandle, "segment reply timeout", [timeout, SN, TransId]),
%% D = fun({_, _, SegRef}) ->
%% megaco_monitor:cancel_apply_after(SegRef)
%% end,
%% incNumTimerRecovery(ConnHandle),
%% %% OTP-4378
%% case megaco_monitor:lookup_reply(TransId) of
%% [#reply{state = waiting_for_ack,
%% bytes = Sent} = Rep] ->
%% Serial = (Rep#reply.trans_id)#trans_id.serial,
%% ConnData =
%% case megaco_config:lookup_local_conn(ConnHandle) of
%% [ConnData0] ->
%% ConnData0;
%% [] ->
%% fake_conn_data(ConnHandle)
%% end,
%% ConnData2 = ConnData#conn_data{serial = Serial},
%% T = #'TransactionAck'{firstAck = Serial},
%% lists:foreach(D, Sent),
%% Extra = ?default_user_callback_extra,
%% handle_ack(ConnData2, {error, timeout}, Rep, T, Extra);
%% [#reply{pending_timer_ref = Ref,
%% bytes = Sent}] -> % aborted?
%% lists:foreach(D, Sent),
%% megaco_monitor:cancel_apply_after(Ref),
%% megaco_monitor:delete_reply(TransId),
%% megaco_config:del_pending_counter(sent, TransId);
%% [] ->
%% ignore
%% end.
%% segment_reply_timeout(ConnHandle, TransId, SN, Timer) ->
%% ?report_trace(ConnHandle, "reply timeout", [Timer, SN, TransId]),
%% %% d("reply_timeout -> entry with"
%% %% "~n ConnHandle: ~p"
%% %% "~n TransId: ~p"
%% %% "~n Timer: ~p", [ConnHandle, TransId, Timer]),
%% case megaco_monitor:lookup_reply(TransId) of
%% [] ->
%% ignore; % Trace ??
%% [#reply{state = waiting_for_ack,
%% bytes = ack_action = {handle_ack, _}} = Rep] ->
%% case megaco_config:lookup_local_conn(ConnHandle) of
%% [ConnData] ->
%% incNumTimerRecovery(ConnHandle),
%% do_reply_timeout(ConnHandle, TransId, ConnData,
%% Timer, Rep);
%% [] ->
%% incNumTimerRecovery(ConnHandle),
%% ConnData = fake_conn_data(ConnHandle),
%% do_reply_timeout(ConnHandle, TransId, ConnData,
%% Timer, Rep)
%% end;
%% [#reply{state = waiting_for_ack} = Rep] ->
%% do_reply_timeout(ConnHandle, TransId, Timer, Rep);
%% [#reply{state = aborted} = Rep] ->
%% do_reply_timeout(ConnHandle, TransId, Timer, Rep);
%% _ ->
%% ignore
%% end.
%% This clause is to catch the timers started prior to the code-upgrade
pending_timeout(#conn_data{conn_handle = CH}, TransId, Timer) ->
?report_trace(CH, "pending timeout(1)", [Timer, TransId]),
pending_timeout(CH, TransId, Timer);
pending_timeout(ConnHandle, TransId, Timer) ->
?report_trace(ConnHandle, "pending timeout(2)", [Timer, TransId]),
case megaco_config:lookup_local_conn(ConnHandle) of
[CD] when (CD#conn_data.cancel == true) ->
cancel_in_progress_ignore;
[CD] ->
Serial = TransId#trans_id.serial,
handle_pending_timeout(CD#conn_data{serial = Serial},
TransId, Timer);
[] ->
no_such_connection_ignore
end.
handle_pending_timeout(CD, TransId, Timer) ->
?report_trace(CD, "handle pending timeout", []),
case lookup_reply(CD, TransId) of
{_Converted,
#reply{state = State,
handler = Pid} = Rep} when (State =:= prepare) orelse
(State =:= eval_request) ->
#conn_data{sent_pending_limit = Limit,
conn_handle = ConnHandle} = CD,
%% ------------------------------------------
%%
%% Check pending limit
%%
%% ------------------------------------------
case check_and_maybe_incr_pending_limit(Limit, sent, TransId) of
ok ->
%% ---------------------------------------------
%%
%% 1) Send pending message
%% 2) Possibly restart the pending timer
%%
%% ---------------------------------------------
send_pending(CD),
case Timer of
timeout ->
%% We are done
incNumTimerRecovery(ConnHandle),
timeout1;
{_, timeout} ->
%% We are done
incNumTimerRecovery(ConnHandle),
timeout2;
_ ->
{WaitFor, Timer2} = megaco_timer:restart(Timer),
M = ?MODULE,
F = pending_timeout,
A = [ConnHandle, TransId, Timer2],
PendingRef =
megaco_monitor:apply_after(M, F, A, WaitFor),
%% Timing problem?
megaco_monitor:update_reply_field(TransId,
#reply.pending_timer_ref,
PendingRef),
{restarted, WaitFor, Timer2}
end;
error ->
%% ------------------------------------------
%%
%% 1) Send 506 error message to other side
%% 2) Notify user
%% 3) Set reply data in aborted state
%%
%% -------------------------------------------
send_pending_limit_error(CD),
handle_request_abort_callback(CD, TransId, Pid),
%% Timing problem?
Rep2 = Rep#reply{state = aborted},
cancel_reply(CD, Rep2, aborted),
pending_limit_error;
aborted ->
%% ------------------------------------------
%%
%% Pending limit already passed
%%
%% -------------------------------------------
Rep2 = Rep#reply{state = aborted},
cancel_reply(CD, Rep2, aborted),
pending_limit_aborted
end;
[] ->
reply_not_found; % Trace ??
{_Converted,
#reply{state = waiting_for_ack}} ->
%% The reply has already been sent
%% No need for any pending trans reply
reply_has_been_sent;
{_Converted,
#reply{state = aborted} = Rep} ->
%% glitch, but cleanup just the same
cancel_reply(CD, Rep, aborted),
reply_aborted_state
end.
segment_timeout(ConnHandle, TransId, timeout = Timer) ->
?report_trace(ConnHandle, "segment timeout", [TransId, Timer]),
incNumTimerRecovery(ConnHandle),
case megaco_monitor:lookup_request(TransId) of
[] ->
timeout_not_found_ignore;
[#request{seg_recv = Segs} = Req] ->
ConnData =
case megaco_config:lookup_local_conn(ConnHandle) of
[ConnData0] ->
ConnData0;
[] ->
fake_conn_data(ConnHandle)
end,
Last = lists:last(lists:sort(Segs)),
All = lists:seq(1,Last),
case All -- Segs of
[] ->
%% The last segment has just arrived, ignore
ok;
Missing ->
%% Send the error message
Code = ?megaco_segments_not_received,
Reason = missing_to_str(Missing),
send_message_error(ConnData, Code, Reason),
%% Report to the user
UserMod = Req#request.user_mod,
UserArgs = Req#request.user_args,
Action = Req#request.reply_action,
UserData = Req#request.reply_data,
UserReply = {error, {segment_timeout, Missing}},
ConnData2 = ConnData#conn_data{user_mod = UserMod,
user_args = UserArgs,
reply_action = Action,
reply_data = UserData},
return_reply(ConnData2, TransId, UserReply)
end
end;
segment_timeout(ConnHandle, TransId, Timer) ->
?report_trace(ConnHandle, "segment timeout", [TransId, Timer]),
case megaco_monitor:lookup_request_field(TransId, #request.trans_id) of
{ok, _} ->
{WaitFor, Timer2} = megaco_timer:restart(Timer),
M = ?MODULE,
F = segment_timeout,
A = [ConnHandle, TransId, Timer2],
Ref = megaco_monitor:apply_after(M, F, A, WaitFor),
%% Timing problem?
megaco_monitor:update_request_field(TransId,
#request.seg_timer_ref,
Ref),
{restarted, WaitFor, Timer2};
_ ->
not_found_ignore
end.
%% segment_reply_timeout() ->
%% ok.
missing_to_str(Missing) ->
lists:flatten(missing_to_str2(Missing)).
missing_to_str2([X]) ->
[integer_to_list(X)];
missing_to_str2([H|T]) ->
[integer_to_list(H) , "," | missing_to_str2(T)].
return_unexpected_trans_reply(ConnData, TransId,
{actionReplies, _} = UserReply, Extra) ->
Trans = make_transaction_reply(ConnData, TransId, UserReply),
return_unexpected_trans(ConnData, Trans, Extra);
return_unexpected_trans_reply(ConnData, TransId,
{transactionError, _} = UserReply, Extra) ->
Trans = make_transaction_reply(ConnData, TransId, UserReply),
return_unexpected_trans(ConnData, Trans, Extra);
return_unexpected_trans_reply(CD, TransId, {error, Reason}, Extra) ->
?report_important(CD, "unexpected trans reply with error",
[TransId, Reason, Extra]),
ok;
return_unexpected_trans_reply(CD, TransId, Crap, Extra) ->
?report_important(CD, "unexpected trans reply with crap",
[TransId, Crap, Extra]),
ok.
return_unexpected_trans(ConnData, Trans) ->
Extra = ?default_user_callback_extra,
return_unexpected_trans(ConnData, Trans, Extra).
return_unexpected_trans(ConnData, Trans0, Extra) ->
UserMod = ConnData#conn_data.user_mod,
UserArgs = ConnData#conn_data.user_args,
ConnHandle = ConnData#conn_data.conn_handle,
Version = ConnData#conn_data.protocol_version,
Trans = transform_transaction_reply_enc(Version, Trans0),
Args =
case Extra of
?default_user_callback_extra ->
[ConnHandle, Version, Trans | UserArgs];
_ ->
[ConnHandle, Version, Trans, Extra | UserArgs]
end,
Res = (catch apply(UserMod, handle_unexpected_trans, Args)),
?report_debug(ConnData, "return: unexpected trans",
[Trans, {return, Res}]),
case Res of
ok ->
ok;
_ ->
warning_msg("unexpected transaction callback failed: ~w", [Res]),
ok
end,
Res.
%%-----------------------------------------------------------------
to_remote_trans_id(#conn_data{conn_handle = CH, serial = Serial}) ->
Mid = CH#megaco_conn_handle.remote_mid,
#trans_id{mid = Mid, serial = Serial}.
to_local_trans_id(#conn_data{conn_handle = CH, serial = Serial}) ->
Mid = CH#megaco_conn_handle.local_mid,
#trans_id{mid = Mid, serial = Serial}.
to_local_trans_id(#conn_data{conn_handle = CH}, [S|_] = Serials)
when is_integer(S) ->
Mid = CH#megaco_conn_handle.local_mid,
[#trans_id{mid = Mid, serial = Serial} || Serial <- Serials];
to_local_trans_id(#conn_data{conn_handle = CH},
[{transactionRequest, TR}|_] = TRs)
when is_record(TR, 'TransactionRequest') ->
Mid = CH#megaco_conn_handle.local_mid,
[#trans_id{mid = Mid, serial = Serial} ||
{transactionRequest,
#'TransactionRequest'{transactionId = Serial}} <- TRs];
to_local_trans_id(#megaco_conn_handle{local_mid = Mid}, Serial)
when is_integer(Serial) ->
#trans_id{mid = Mid, serial = Serial};
to_local_trans_id(#conn_data{conn_handle = CH}, Serial)
when is_integer(Serial) ->
Mid = CH#megaco_conn_handle.local_mid,
#trans_id{mid = Mid, serial = Serial}.
%%-----------------------------------------------------------------
transform_transaction_reply_dec({'TransactionReply',
TransId, IAR, TransRes}) ->
#megaco_transaction_reply{transactionId = TransId,
immAckRequired = IAR,
transactionResult = TransRes};
transform_transaction_reply_dec({'TransactionReply',
TransId, IAR, TransRes,
SegNo, SegComplete}) ->
#megaco_transaction_reply{transactionId = TransId,
immAckRequired = IAR,
transactionResult = TransRes,
segmentNumber = SegNo,
segmentationComplete = SegComplete}.
transform_transaction_reply_enc(
3,
#megaco_transaction_reply{transactionId = TransId,
immAckRequired = IAR,
transactionResult = TransRes,
segmentNumber = SegNo,
segmentationComplete = SegComplete}) ->
{'TransactionReply', TransId, IAR, TransRes, SegNo, SegComplete};
transform_transaction_reply_enc(
Version,
#megaco_transaction_reply{transactionId = TransId,
immAckRequired = IAR,
transactionResult = TransRes})
when (Version < 3) ->
{'TransactionReply', TransId, IAR, TransRes};
transform_transaction_reply_enc(_, TR) ->
TR.
make_transaction_reply(#conn_data{protocol_version = Version},
TransId, TransRes) ->
make_transaction_reply(Version, TransId, asn1_NOVALUE, TransRes).
%% make_transaction_reply(#conn_data{protocol_version = Version},
%% TransId, IAR, TransRes) ->
%% make_transaction_reply(Version, TransId, IAR, TransRes);
make_transaction_reply(3, TransId, IAR, TransRes) ->
{'TransactionReply', TransId, IAR, TransRes, asn1_NOVALUE, asn1_NOVALUE};
make_transaction_reply(_, TransId, IAR, TransRes) ->
{'TransactionReply', TransId, IAR, TransRes}.
%%-----------------------------------------------------------------
%% This function is used as a wrapper for reply-record lookups.
%% The intention is that during upgrade, this function
%% can perform on-the-fly conversions of reply-records.
lookup_reply(CD, TransId) ->
case megaco_monitor:lookup_reply(TransId) of
[#reply{} = Rep] ->
{false, Rep};
%% Old (pre-3.13.1) version of the record => Convert to new version
[{reply, TransId,
LocalMid, State, PendingTmrRef, Handler, TimerRef,
Version, Bytes, AckAction, SendHandle, Segments}]
when is_record(CD, conn_data) ->
#conn_data{user_mod = UserMod,
user_args = UserArgs} = CD,
Rep = #reply{trans_id = TransId,
local_mid = LocalMid,
state = State,
pending_timer_ref = PendingTmrRef,
handler = Handler,
timer_ref = TimerRef,
version = Version,
bytes = Bytes,
ack_action = AckAction,
send_handle = SendHandle,
segments = Segments,
user_mod = UserMod,
user_args = UserArgs},
{true, Rep};
%% Old (pre-3.13.1) version of the record => Convert to new version
[{reply, TransId,
LocalMid, State, PendingTmrRef, Handler, TimerRef,
Version, Bytes, AckAction, SendHandle, Segments}] ->
%% ConnData is not known here, so ignore for now
Rep = #reply{trans_id = TransId,
local_mid = LocalMid,
state = State,
pending_timer_ref = PendingTmrRef,
handler = Handler,
timer_ref = TimerRef,
version = Version,
bytes = Bytes,
ack_action = AckAction,
send_handle = SendHandle,
segments = Segments},
{true, Rep};
Else ->
Else
end.
%%-----------------------------------------------------------------
%%-----------------------------------------------------------------
%% info_msg(F, A) ->
%% ?megaco_info(F, A).
warning_msg(F, A) ->
?megaco_warning(F, A).
error_msg(F, A) ->
?megaco_error(F, A).
%%-----------------------------------------------------------------
%% d(F) ->
%% d(F,[]).
%%
%% d(F,A) ->
%% d(true,F,A).
%% %% d(get(dbg),F,A).
%%
%% d(true,F,A) ->
%% io:format("*** [~s] ~p:~p ***"
%% "~n " ++ F ++ "~n",
%% [format_timestamp(now()), self(),?MODULE|A]);
%% d(_, _, _) ->
%% ok.
%%
%% format_timestamp({_N1, _N2, N3} = Now) ->
%% {Date, Time} = calendar:now_to_datetime(Now),
%% {YYYY,MM,DD} = Date,
%% {Hour,Min,Sec} = Time,
%% FormatDate =
%% io_lib:format("~.4w:~.2.0w:~.2.0w ~.2.0w:~.2.0w:~.2.0w 4~w",
%% [YYYY,MM,DD,Hour,Min,Sec,round(N3/1000)]),
%% lists:flatten(FormatDate).
%% Time in milli seconds
t() ->
{A,B,C} = os:timestamp(),
A*1000000000+B*1000+(C div 1000).
%%-----------------------------------------------------------------
%% Func: incNumErrors/0, incNumErrors/1, incNumTimerRecovery/1
%% Description: SNMP counter increment functions
%%-----------------------------------------------------------------
incNumErrors() ->
incNum(medGwyGatewayNumErrors).
incNumErrors(CH) ->
incNum({CH, medGwyGatewayNumErrors}).
incNumTimerRecovery(CH) ->
incNum({CH, medGwyGatewayNumTimerRecovery}).
incNum(Cnt) ->
case (catch ets:update_counter(megaco_stats, Cnt, 1)) of
{'EXIT', {badarg, _Reason}} ->
ets:insert(megaco_stats, {Cnt, 1});
Old ->
Old
end.
