mirror of
https://github.com/matrix-org/dendrite
synced 2024-11-16 06:41:06 +01:00
363 lines
12 KiB
Go
363 lines
12 KiB
Go
// Copyright 2022 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package internal
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import (
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"context"
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"encoding/json"
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"fmt"
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"sync"
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"github.com/getsentry/sentry-go"
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"github.com/matrix-org/dendrite/federationapi/producers"
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"github.com/matrix-org/dendrite/federationapi/types"
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"github.com/matrix-org/dendrite/roomserver/api"
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rstypes "github.com/matrix-org/dendrite/roomserver/types"
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syncTypes "github.com/matrix-org/dendrite/syncapi/types"
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userAPI "github.com/matrix-org/dendrite/userapi/api"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/matrix-org/gomatrixserverlib/fclient"
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"github.com/matrix-org/gomatrixserverlib/spec"
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"github.com/matrix-org/util"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/sirupsen/logrus"
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)
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var (
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PDUCountTotal = prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Namespace: "dendrite",
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Subsystem: "federationapi",
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Name: "recv_pdus",
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Help: "Number of incoming PDUs from remote servers with labels for success",
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},
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[]string{"status"}, // 'success' or 'total'
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)
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EDUCountTotal = prometheus.NewCounter(
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prometheus.CounterOpts{
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Namespace: "dendrite",
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Subsystem: "federationapi",
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Name: "recv_edus",
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Help: "Number of incoming EDUs from remote servers",
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},
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)
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)
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type TxnReq struct {
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gomatrixserverlib.Transaction
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rsAPI api.FederationRoomserverAPI
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userAPI userAPI.FederationUserAPI
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ourServerName spec.ServerName
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keys gomatrixserverlib.JSONVerifier
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roomsMu *MutexByRoom
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producer *producers.SyncAPIProducer
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inboundPresenceEnabled bool
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}
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func NewTxnReq(
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rsAPI api.FederationRoomserverAPI,
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userAPI userAPI.FederationUserAPI,
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ourServerName spec.ServerName,
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keys gomatrixserverlib.JSONVerifier,
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roomsMu *MutexByRoom,
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producer *producers.SyncAPIProducer,
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inboundPresenceEnabled bool,
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pdus []json.RawMessage,
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edus []gomatrixserverlib.EDU,
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origin spec.ServerName,
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transactionID gomatrixserverlib.TransactionID,
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destination spec.ServerName,
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) TxnReq {
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t := TxnReq{
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rsAPI: rsAPI,
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userAPI: userAPI,
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ourServerName: ourServerName,
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keys: keys,
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roomsMu: roomsMu,
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producer: producer,
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inboundPresenceEnabled: inboundPresenceEnabled,
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}
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t.PDUs = pdus
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t.EDUs = edus
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t.Origin = origin
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t.TransactionID = transactionID
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t.Destination = destination
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return t
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}
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func (t *TxnReq) ProcessTransaction(ctx context.Context) (*fclient.RespSend, *util.JSONResponse) {
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var wg sync.WaitGroup
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wg.Add(1)
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go func() {
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defer wg.Done()
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if t.producer != nil {
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t.processEDUs(ctx)
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}
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}()
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results := make(map[string]fclient.PDUResult)
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roomVersions := make(map[string]gomatrixserverlib.RoomVersion)
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getRoomVersion := func(roomID string) gomatrixserverlib.RoomVersion {
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if v, ok := roomVersions[roomID]; ok {
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return v
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}
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roomVersion, err := t.rsAPI.QueryRoomVersionForRoom(ctx, roomID)
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if err != nil {
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util.GetLogger(ctx).WithError(err).Debug("Transaction: Failed to query room version for room", roomID)
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return ""
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}
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roomVersions[roomID] = roomVersion
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return roomVersion
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}
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for _, pdu := range t.PDUs {
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PDUCountTotal.WithLabelValues("total").Inc()
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var header struct {
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RoomID string `json:"room_id"`
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}
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if err := json.Unmarshal(pdu, &header); err != nil {
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util.GetLogger(ctx).WithError(err).Debug("Transaction: Failed to extract room ID from event")
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// We don't know the event ID at this point so we can't return the
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// failure in the PDU results
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continue
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}
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roomVersion := getRoomVersion(header.RoomID)
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verImpl, err := gomatrixserverlib.GetRoomVersion(roomVersion)
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if err != nil {
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continue
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}
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event, err := verImpl.NewEventFromUntrustedJSON(pdu)
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if err != nil {
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if _, ok := err.(gomatrixserverlib.BadJSONError); ok {
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// Room version 6 states that homeservers should strictly enforce canonical JSON
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// on PDUs.
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//
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// This enforces that the entire transaction is rejected if a single bad PDU is
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// sent. It is unclear if this is the correct behaviour or not.
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//
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// See https://github.com/matrix-org/synapse/issues/7543
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return nil, &util.JSONResponse{
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Code: 400,
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JSON: spec.BadJSON("PDU contains bad JSON"),
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}
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}
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util.GetLogger(ctx).WithError(err).Debugf("Transaction: Failed to parse event JSON of event %s", string(pdu))
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continue
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}
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if event.Type() == spec.MRoomCreate && event.StateKeyEquals("") {
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continue
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}
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if api.IsServerBannedFromRoom(ctx, t.rsAPI, event.RoomID().String(), t.Origin) {
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results[event.EventID()] = fclient.PDUResult{
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Error: "Forbidden by server ACLs",
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}
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continue
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}
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if err = gomatrixserverlib.VerifyEventSignatures(ctx, event, t.keys, func(roomID spec.RoomID, senderID spec.SenderID) (*spec.UserID, error) {
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return t.rsAPI.QueryUserIDForSender(ctx, roomID, senderID)
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}); err != nil {
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util.GetLogger(ctx).WithError(err).Debugf("Transaction: Couldn't validate signature of event %q", event.EventID())
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results[event.EventID()] = fclient.PDUResult{
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Error: err.Error(),
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}
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continue
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}
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// pass the event to the roomserver which will do auth checks
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// If the event fail auth checks, gmsl.NotAllowed error will be returned which we be silently
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// discarded by the caller of this function
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if err = api.SendEvents(
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ctx,
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t.rsAPI,
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api.KindNew,
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[]*rstypes.HeaderedEvent{
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{PDU: event},
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},
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t.Destination,
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t.Origin,
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api.DoNotSendToOtherServers,
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nil,
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true,
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); err != nil {
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util.GetLogger(ctx).WithError(err).Errorf("Transaction: Couldn't submit event %q to input queue: %s", event.EventID(), err)
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results[event.EventID()] = fclient.PDUResult{
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Error: err.Error(),
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}
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continue
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}
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results[event.EventID()] = fclient.PDUResult{}
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PDUCountTotal.WithLabelValues("success").Inc()
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}
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wg.Wait()
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return &fclient.RespSend{PDUs: results}, nil
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}
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// nolint:gocyclo
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func (t *TxnReq) processEDUs(ctx context.Context) {
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for _, e := range t.EDUs {
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EDUCountTotal.Inc()
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switch e.Type {
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case spec.MTyping:
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// https://matrix.org/docs/spec/server_server/latest#typing-notifications
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var typingPayload struct {
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RoomID string `json:"room_id"`
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UserID string `json:"user_id"`
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Typing bool `json:"typing"`
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}
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if err := json.Unmarshal(e.Content, &typingPayload); err != nil {
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util.GetLogger(ctx).WithError(err).Debug("Failed to unmarshal typing event")
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continue
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}
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if _, serverName, err := gomatrixserverlib.SplitID('@', typingPayload.UserID); err != nil {
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continue
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} else if serverName == t.ourServerName {
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continue
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} else if serverName != t.Origin {
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continue
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}
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if err := t.producer.SendTyping(ctx, typingPayload.UserID, typingPayload.RoomID, typingPayload.Typing, 30*1000); err != nil {
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util.GetLogger(ctx).WithError(err).Error("Failed to send typing event to JetStream")
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}
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case spec.MDirectToDevice:
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// https://matrix.org/docs/spec/server_server/r0.1.3#m-direct-to-device-schema
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var directPayload gomatrixserverlib.ToDeviceMessage
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if err := json.Unmarshal(e.Content, &directPayload); err != nil {
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util.GetLogger(ctx).WithError(err).Debug("Failed to unmarshal send-to-device events")
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continue
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}
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if _, serverName, err := gomatrixserverlib.SplitID('@', directPayload.Sender); err != nil {
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continue
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} else if serverName == t.ourServerName {
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continue
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} else if serverName != t.Origin {
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continue
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}
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for userID, byUser := range directPayload.Messages {
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for deviceID, message := range byUser {
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// TODO: check that the user and the device actually exist here
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if err := t.producer.SendToDevice(ctx, directPayload.Sender, userID, deviceID, directPayload.Type, message); err != nil {
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sentry.CaptureException(err)
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util.GetLogger(ctx).WithError(err).WithFields(logrus.Fields{
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"sender": directPayload.Sender,
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"user_id": userID,
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"device_id": deviceID,
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}).Error("Failed to send send-to-device event to JetStream")
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}
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}
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}
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case spec.MDeviceListUpdate:
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if err := t.producer.SendDeviceListUpdate(ctx, e.Content, t.Origin); err != nil {
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sentry.CaptureException(err)
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util.GetLogger(ctx).WithError(err).Error("failed to InputDeviceListUpdate")
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}
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case spec.MReceipt:
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// https://matrix.org/docs/spec/server_server/r0.1.4#receipts
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payload := map[string]types.FederationReceiptMRead{}
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if err := json.Unmarshal(e.Content, &payload); err != nil {
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util.GetLogger(ctx).WithError(err).Debug("Failed to unmarshal receipt event")
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continue
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}
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for roomID, receipt := range payload {
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for userID, mread := range receipt.User {
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_, domain, err := gomatrixserverlib.SplitID('@', userID)
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if err != nil {
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util.GetLogger(ctx).WithError(err).Debug("Failed to split domain from receipt event sender")
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continue
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}
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if t.Origin != domain {
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util.GetLogger(ctx).Debugf("Dropping receipt event where sender domain (%q) doesn't match origin (%q)", domain, t.Origin)
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continue
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}
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if err := t.processReceiptEvent(ctx, userID, roomID, "m.read", mread.Data.TS, mread.EventIDs); err != nil {
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util.GetLogger(ctx).WithError(err).WithFields(logrus.Fields{
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"sender": t.Origin,
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"user_id": userID,
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"room_id": roomID,
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"events": mread.EventIDs,
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}).Error("Failed to send receipt event to JetStream")
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continue
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}
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}
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}
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case types.MSigningKeyUpdate:
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if err := t.producer.SendSigningKeyUpdate(ctx, e.Content, t.Origin); err != nil {
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sentry.CaptureException(err)
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logrus.WithError(err).Errorf("Failed to process signing key update")
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}
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case spec.MPresence:
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if t.inboundPresenceEnabled {
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if err := t.processPresence(ctx, e); err != nil {
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logrus.WithError(err).Errorf("Failed to process presence update")
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}
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}
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default:
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util.GetLogger(ctx).WithField("type", e.Type).Debug("Unhandled EDU")
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}
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}
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}
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// processPresence handles m.receipt events
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func (t *TxnReq) processPresence(ctx context.Context, e gomatrixserverlib.EDU) error {
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payload := types.Presence{}
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if err := json.Unmarshal(e.Content, &payload); err != nil {
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return err
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}
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for _, content := range payload.Push {
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if _, serverName, err := gomatrixserverlib.SplitID('@', content.UserID); err != nil {
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continue
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} else if serverName == t.ourServerName {
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continue
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} else if serverName != t.Origin {
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continue
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}
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presence, ok := syncTypes.PresenceFromString(content.Presence)
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if !ok {
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continue
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}
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if err := t.producer.SendPresence(ctx, content.UserID, presence, content.StatusMsg, content.LastActiveAgo); err != nil {
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return err
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}
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}
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return nil
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}
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// processReceiptEvent sends receipt events to JetStream
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func (t *TxnReq) processReceiptEvent(ctx context.Context,
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userID, roomID, receiptType string,
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timestamp spec.Timestamp,
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eventIDs []string,
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) error {
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if _, serverName, err := gomatrixserverlib.SplitID('@', userID); err != nil {
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return nil
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} else if serverName == t.ourServerName {
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return nil
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} else if serverName != t.Origin {
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return nil
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}
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// store every event
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for _, eventID := range eventIDs {
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if err := t.producer.SendReceipt(ctx, userID, roomID, eventID, receiptType, timestamp); err != nil {
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return fmt.Errorf("unable to set receipt event: %w", err)
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}
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}
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return nil
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}
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