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%% This Source Code Form is subject to the terms of the Mozilla Public
%% License, v. 2.0. If a copy of the MPL was not distributed with this
%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
%%
%% Copyright (c) 2007-2021 VMware, Inc. or its affiliates. All rights reserved.
%%
-module(rabbit_amqp1_0_incoming_link).
-export([attach/3, transfer/4]).
-include_lib("amqp_client/include/amqp_client.hrl").
-include("rabbit_amqp1_0.hrl").
-import(rabbit_amqp1_0_util, [protocol_error/3]).
%% Just make these constant for the time being.
-define(INCOMING_CREDIT, 65536).
-record(incoming_link, {name, exchange, routing_key,
delivery_id = undefined,
delivery_count = 0,
send_settle_mode = undefined,
recv_settle_mode = undefined,
credit_used = ?INCOMING_CREDIT div 2,
msg_acc = [],
route_state}).
attach(#'v1_0.attach'{name = Name,
handle = Handle,
source = Source,
snd_settle_mode = SndSettleMode,
rcv_settle_mode = RcvSettleMode,
target = Target,
initial_delivery_count = {uint, InitTransfer}},
BCh, DCh) ->
%% TODO associate link name with target
case ensure_target(Target,
#incoming_link{
name = Name,
route_state = rabbit_routing_util:init_state(),
delivery_count = InitTransfer },
DCh) of
{ok, ServerTarget, IncomingLink} ->
{_, _Outcomes} = rabbit_amqp1_0_link_util:outcomes(Source),
%% Default is mixed
Confirm =
case SndSettleMode of
?V_1_0_SENDER_SETTLE_MODE_SETTLED ->
false;
_ when SndSettleMode == undefined;
SndSettleMode == ?V_1_0_SENDER_SETTLE_MODE_UNSETTLED;
SndSettleMode == ?V_1_0_SENDER_SETTLE_MODE_MIXED ->
amqp_channel:register_confirm_handler(BCh, self()),
rabbit_amqp1_0_channel:call(BCh, #'confirm.select'{}),
true
end,
Flow = #'v1_0.flow'{ handle = Handle,
link_credit = {uint, ?INCOMING_CREDIT},
drain = false,
echo = false },
Attach = #'v1_0.attach'{
name = Name,
handle = Handle,
source = Source,
snd_settle_mode = SndSettleMode,
rcv_settle_mode = RcvSettleMode,
target = ServerTarget,
initial_delivery_count = undefined, % must be, I am the receiver
role = ?RECV_ROLE}, %% server is receiver
IncomingLink1 =
IncomingLink#incoming_link{recv_settle_mode = RcvSettleMode},
{ok, [Attach, Flow], IncomingLink1, Confirm};
{error, Reason} ->
%% TODO proper link establishment protocol here?
protocol_error(?V_1_0_AMQP_ERROR_INVALID_FIELD,
"Attach rejected: ~p", [Reason])
end.
set_delivery_id({uint, D},
#incoming_link{delivery_id = undefined} = Link) ->
Link#incoming_link{delivery_id = D};
set_delivery_id(DeliveryId,
#incoming_link{delivery_id = D} = Link)
when DeliveryId == {uint, D} orelse DeliveryId == undefined ->
Link.
effective_send_settle_mode(undefined, undefined) ->
false;
effective_send_settle_mode(undefined, SettleMode)
when is_boolean(SettleMode) ->
SettleMode;
effective_send_settle_mode(SettleMode, undefined)
when is_boolean(SettleMode) ->
SettleMode;
effective_send_settle_mode(SettleMode, SettleMode)
when is_boolean(SettleMode) ->
SettleMode.
effective_recv_settle_mode(undefined, undefined) ->
?V_1_0_RECEIVER_SETTLE_MODE_FIRST;
effective_recv_settle_mode(undefined, Mode) ->
Mode;
effective_recv_settle_mode(Mode, _) ->
Mode.
% TODO: validate effective settle modes against
% those declared during attach
% TODO: handle aborted transfers
transfer(#'v1_0.transfer'{delivery_id = DeliveryId,
more = true,
settled = Settled}, MsgPart,
#incoming_link{msg_acc = MsgAcc,
send_settle_mode = SSM} = Link, _BCh) ->
{ok, set_delivery_id(
DeliveryId,
Link#incoming_link{msg_acc = [MsgPart | MsgAcc],
send_settle_mode =
effective_send_settle_mode(Settled, SSM)})};
transfer(#'v1_0.transfer'{delivery_id = DeliveryId0,
settled = Settled,
rcv_settle_mode = RcvSettleMode,
handle = Handle},
MsgPart,
#incoming_link{exchange = X,
routing_key = LinkRKey,
delivery_count = Count,
credit_used = CreditUsed,
msg_acc = MsgAcc,
send_settle_mode = SSM,
recv_settle_mode = RSM} = Link, BCh) ->
MsgBin = iolist_to_binary(lists:reverse([MsgPart | MsgAcc])),
?DEBUG("Inbound content:~n ~p",
[[amqp10_framing:pprint(Section) ||
Section <- amqp10_framing:decode_bin(MsgBin)]]),
{MsgRKey, Msg} = rabbit_amqp1_0_message:assemble(MsgBin),
RKey = case LinkRKey of
undefined -> MsgRKey;
_ -> LinkRKey
end,
rabbit_amqp1_0_channel:cast_flow(
BCh, #'basic.publish'{exchange = X,
routing_key = RKey}, Msg),
{SendFlow, CreditUsed1} = case CreditUsed - 1 of
C when C =< 0 ->
{true, ?INCOMING_CREDIT div 2};
D ->
{false, D}
end,
#incoming_link{delivery_id = DeliveryId} =
set_delivery_id(DeliveryId0, Link),
NewLink = Link#incoming_link{
delivery_id = undefined,
send_settle_mode = undefined,
delivery_count = rabbit_amqp1_0_util:serial_add(Count, 1),
credit_used = CreditUsed1,
msg_acc = []},
Reply = case SendFlow of
true -> ?DEBUG("sending flow for incoming ~p", [NewLink]),
[incoming_flow(NewLink, Handle)];
false -> []
end,
EffectiveSendSettleMode = effective_send_settle_mode(Settled, SSM),
EffectiveRecvSettleMode = effective_recv_settle_mode(RcvSettleMode, RSM),
case not EffectiveSendSettleMode andalso
EffectiveRecvSettleMode =:= ?V_1_0_RECEIVER_SETTLE_MODE_SECOND of
false -> ok;
true -> protocol_error(?V_1_0_AMQP_ERROR_NOT_IMPLEMENTED,
"rcv-settle-mode second not supported", [])
end,
{message, Reply, NewLink, DeliveryId,
EffectiveSendSettleMode}.
%% TODO default-outcome and outcomes, dynamic lifetimes
ensure_target(Target = #'v1_0.target'{address = Address,
dynamic = Dynamic,
durable = Durable,
%% TODO
expiry_policy = _ExpiryPolicy,
%% TODO
timeout = _Timeout},
Link = #incoming_link{ route_state = RouteState }, DCh) ->
DeclareParams = [{durable, rabbit_amqp1_0_link_util:durable(Durable)},
{exclusive, false},
{auto_delete, false},
{check_exchange, true},
{nowait, false}],
case Dynamic of
true ->
protocol_error(?V_1_0_AMQP_ERROR_NOT_IMPLEMENTED,
"Dynamic targets not supported", []);
_ ->
ok
end,
case Address of
{utf8, Destination} ->
case rabbit_routing_util:parse_endpoint(Destination, true) of
{ok, Dest} ->
{ok, _Queue, RouteState1} =
rabbit_amqp1_0_channel:convert_error(
fun () ->
rabbit_routing_util:ensure_endpoint(
dest, DCh, Dest, DeclareParams,
RouteState)
end),
{XName, RK} = rabbit_routing_util:parse_routing(Dest),
{ok, Target, Link#incoming_link{
route_state = RouteState1,
exchange = list_to_binary(XName),
routing_key = case RK of
undefined -> undefined;
[] -> undefined;
_ -> list_to_binary(RK)
end}};
{error, _} = E ->
E
end;
_Else ->
{error, {address_not_utf8_string, Address}}
end.
incoming_flow(#incoming_link{ delivery_count = Count }, Handle) ->
#'v1_0.flow'{handle = Handle,
delivery_count = {uint, Count},
link_credit = {uint, ?INCOMING_CREDIT}}.
|
