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// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package consumers
import (
"context"
"encoding/json"
"github.com/getsentry/sentry-go"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
"github.com/nats-io/nats.go"
log "github.com/sirupsen/logrus"
"github.com/tidwall/gjson"
keyapi "github.com/matrix-org/dendrite/keyserver/api"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/dendrite/setup/jetstream"
"github.com/matrix-org/dendrite/setup/process"
"github.com/matrix-org/dendrite/syncapi/notifier"
"github.com/matrix-org/dendrite/syncapi/storage"
"github.com/matrix-org/dendrite/syncapi/types"
)
// OutputSendToDeviceEventConsumer consumes events that originated in the EDU server.
type OutputSendToDeviceEventConsumer struct {
ctx context.Context
jetstream nats.JetStreamContext
durable string
topic string
db storage.Database
keyAPI keyapi.SyncKeyAPI
serverName gomatrixserverlib.ServerName // our server name
stream types.StreamProvider
notifier *notifier.Notifier
}
// NewOutputSendToDeviceEventConsumer creates a new OutputSendToDeviceEventConsumer.
// Call Start() to begin consuming from the EDU server.
func NewOutputSendToDeviceEventConsumer(
process *process.ProcessContext,
cfg *config.SyncAPI,
js nats.JetStreamContext,
store storage.Database,
keyAPI keyapi.SyncKeyAPI,
notifier *notifier.Notifier,
stream types.StreamProvider,
) *OutputSendToDeviceEventConsumer {
return &OutputSendToDeviceEventConsumer{
ctx: process.Context(),
jetstream: js,
topic: cfg.Matrix.JetStream.Prefixed(jetstream.OutputSendToDeviceEvent),
durable: cfg.Matrix.JetStream.Durable("SyncAPISendToDeviceConsumer"),
db: store,
keyAPI: keyAPI,
serverName: cfg.Matrix.ServerName,
notifier: notifier,
stream: stream,
}
}
// Start consuming send-to-device events.
func (s *OutputSendToDeviceEventConsumer) Start() error {
return jetstream.JetStreamConsumer(
s.ctx, s.jetstream, s.topic, s.durable, 1,
s.onMessage, nats.DeliverAll(), nats.ManualAck(),
)
}
func (s *OutputSendToDeviceEventConsumer) onMessage(ctx context.Context, msgs []*nats.Msg) bool {
msg := msgs[0] // Guaranteed to exist if onMessage is called
userID := msg.Header.Get(jetstream.UserID)
_, domain, err := gomatrixserverlib.SplitID('@', userID)
if err != nil {
sentry.CaptureException(err)
log.WithError(err).Errorf("send-to-device: failed to split user id, dropping message")
return true
}
if domain != s.serverName {
log.Tracef("ignoring send-to-device event with destination %s", domain)
return true
}
var output types.OutputSendToDeviceEvent
if err = json.Unmarshal(msg.Data, &output); err != nil {
// If the message was invalid, log it and move on to the next message in the stream
log.WithError(err).Errorf("send-to-device: message parse failure")
sentry.CaptureException(err)
return true
}
logger := util.GetLogger(context.TODO()).WithFields(log.Fields{
"sender": output.Sender,
"user_id": output.UserID,
"device_id": output.DeviceID,
"event_type": output.Type,
})
logger.Debugf("sync API received send-to-device event from the clientapi/federationsender")
// Check we actually got the requesting device in our store, if we receive a room key request
if output.Type == "m.room_key_request" {
requestingDeviceID := gjson.GetBytes(output.SendToDeviceEvent.Content, "requesting_device_id").Str
_, senderDomain, _ := gomatrixserverlib.SplitID('@', output.Sender)
if requestingDeviceID != "" && senderDomain != s.serverName {
// Mark the requesting device as stale, if we don't know about it.
if err = s.keyAPI.PerformMarkAsStaleIfNeeded(ctx, &keyapi.PerformMarkAsStaleRequest{
UserID: output.Sender, Domain: senderDomain, DeviceID: requestingDeviceID,
}, &struct{}{}); err != nil {
logger.WithError(err).Errorf("failed to mark as stale if needed")
return false
}
}
}
streamPos, err := s.db.StoreNewSendForDeviceMessage(
s.ctx, output.UserID, output.DeviceID, output.SendToDeviceEvent,
)
if err != nil {
sentry.CaptureException(err)
log.WithError(err).Errorf("send-to-device: failed to store message")
return false
}
s.stream.Advance(streamPos)
s.notifier.OnNewSendToDevice(
output.UserID,
[]string{output.DeviceID},
types.StreamingToken{SendToDevicePosition: streamPos},
)
return true
}
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