Implement /get_missing_events (#1022)
* WIP get_missing_events work
* More WIP get_missing_events work
* First working /get_missing_events implementation
Flakey currently due to racing between /sync and /send
* Final tweaks
* Remove log lines
* Linting
* go mod tidy
* Clamp min depth to 0
* sort events by depth because sytest makes me sad
Specifically I think it's
4172585c25/lib/SyTest/Federation/Client.pm (L265)
to blame here.
This commit is contained in:
Kegsay
GitHub
parent
32624697fd
commit
ce5dfbebf9
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@ -17,6 +17,7 @@ package routing
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import (
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"fmt"
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"net/http"
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"sort"
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"time"
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"github.com/matrix-org/dendrite/clientapi/jsonerror"
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@ -275,6 +276,12 @@ func SendJoin(
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}
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}
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// sort events deterministically by depth (lower is earlier)
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// We also do this because sytest's basic federation server isn't good at using the correct
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// state if these lists are randomised, resulting in flakey tests. :(
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sort.Sort(eventsByDepth(stateAndAuthChainResponse.StateEvents))
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sort.Sort(eventsByDepth(stateAndAuthChainResponse.AuthChainEvents))
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// https://matrix.org/docs/spec/server_server/latest#put-matrix-federation-v1-send-join-roomid-eventid
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return util.JSONResponse{
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Code: http.StatusOK,
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@ -285,3 +292,15 @@ func SendJoin(
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},
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}
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}
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type eventsByDepth []gomatrixserverlib.HeaderedEvent
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func (e eventsByDepth) Len() int {
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return len(e)
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}
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func (e eventsByDepth) Swap(i, j int) {
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e[i], e[j] = e[j], e[i]
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}
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func (e eventsByDepth) Less(i, j int) bool {
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return e[i].Depth() < e[j].Depth()
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}
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@ -226,6 +226,28 @@ func Setup(
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},
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)).Methods(http.MethodGet)
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v1fedmux.Handle("/send_join/{roomID}/{eventID}", common.MakeFedAPI(
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"federation_send_join", cfg.Matrix.ServerName, keys,
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func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse {
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vars, err := common.URLDecodeMapValues(mux.Vars(httpReq))
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if err != nil {
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return util.ErrorResponse(err)
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}
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roomID := vars["roomID"]
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eventID := vars["eventID"]
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res := SendJoin(
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httpReq, request, cfg, rsAPI, producer, keys, roomID, eventID,
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)
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return util.JSONResponse{
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Headers: res.Headers,
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Code: res.Code,
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JSON: []interface{}{
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res.Code, res.JSON,
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},
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}
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},
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)).Methods(http.MethodPut)
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v2fedmux.Handle("/send_join/{roomID}/{eventID}", common.MakeFedAPI(
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"federation_send_join", cfg.Matrix.ServerName, keys,
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func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse {
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@ -48,6 +48,8 @@ func Send(
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eduProducer: eduProducer,
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keys: keys,
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federation: federation,
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haveEvents: make(map[string]*gomatrixserverlib.HeaderedEvent),
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newEvents: make(map[string]bool),
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}
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var txnEvents struct {
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@ -105,6 +107,11 @@ type txnReq struct {
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eduProducer *producers.EDUServerProducer
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keys gomatrixserverlib.JSONVerifier
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federation txnFederationClient
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// local cache of events for auth checks, etc - this may include events
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// which the roomserver is unaware of.
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haveEvents map[string]*gomatrixserverlib.HeaderedEvent
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// new events which the roomserver does not know about
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newEvents map[string]bool
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}
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// A subset of FederationClient functionality that txn requires. Useful for testing.
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@ -114,6 +121,8 @@ type txnFederationClient interface {
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)
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LookupStateIDs(ctx context.Context, s gomatrixserverlib.ServerName, roomID string, eventID string) (res gomatrixserverlib.RespStateIDs, err error)
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GetEvent(ctx context.Context, s gomatrixserverlib.ServerName, eventID string) (res gomatrixserverlib.Transaction, err error)
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LookupMissingEvents(ctx context.Context, s gomatrixserverlib.ServerName, roomID string, missing gomatrixserverlib.MissingEvents,
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roomVersion gomatrixserverlib.RoomVersion) (res gomatrixserverlib.RespMissingEvents, err error)
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}
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func (t *txnReq) processTransaction() (*gomatrixserverlib.RespSend, error) {
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@ -148,7 +157,7 @@ func (t *txnReq) processTransaction() (*gomatrixserverlib.RespSend, error) {
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// Process the events.
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for _, e := range pdus {
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err := t.processEvent(e.Unwrap())
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err := t.processEvent(e.Unwrap(), true)
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if err != nil {
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// If the error is due to the event itself being bad then we skip
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// it and move onto the next event. We report an error so that the
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@ -168,7 +177,9 @@ func (t *txnReq) processTransaction() (*gomatrixserverlib.RespSend, error) {
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switch err.(type) {
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case roomNotFoundError:
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case *gomatrixserverlib.NotAllowed:
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case missingPrevEventsError:
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default:
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util.GetLogger(t.context).Warnf("Processing %s failed: %s", e.EventID(), err)
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// Any other error should be the result of a temporary error in
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// our server so we should bail processing the transaction entirely.
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return nil, err
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@ -197,12 +208,30 @@ type verifySigError struct {
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eventID string
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err error
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}
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type missingPrevEventsError struct {
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eventID string
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err error
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}
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func (e roomNotFoundError) Error() string { return fmt.Sprintf("room %q not found", e.roomID) }
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func (e unmarshalError) Error() string { return fmt.Sprintf("unable to parse event: %s", e.err) }
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func (e verifySigError) Error() string {
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return fmt.Sprintf("unable to verify signature of event %q: %s", e.eventID, e.err)
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}
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func (e missingPrevEventsError) Error() string {
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return fmt.Sprintf("unable to get prev_events for event %q: %s", e.eventID, e.err)
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}
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func (t *txnReq) haveEventIDs() map[string]bool {
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result := make(map[string]bool, len(t.haveEvents))
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for eventID := range t.haveEvents {
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if t.newEvents[eventID] {
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continue
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}
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result[eventID] = true
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}
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return result
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}
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func (t *txnReq) processEDUs(edus []gomatrixserverlib.EDU) {
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for _, e := range edus {
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@ -227,7 +256,7 @@ func (t *txnReq) processEDUs(edus []gomatrixserverlib.EDU) {
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}
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}
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func (t *txnReq) processEvent(e gomatrixserverlib.Event) error {
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func (t *txnReq) processEvent(e gomatrixserverlib.Event, isInboundTxn bool) error {
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prevEventIDs := e.PrevEventIDs()
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// Fetch the state needed to authenticate the event.
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@ -253,21 +282,14 @@ func (t *txnReq) processEvent(e gomatrixserverlib.Event) error {
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}
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if !stateResp.PrevEventsExist {
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return t.processEventWithMissingState(e, stateResp.RoomVersion)
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return t.processEventWithMissingState(e, stateResp.RoomVersion, isInboundTxn)
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}
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// Check that the event is allowed by the state at the event.
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var events []gomatrixserverlib.Event
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for _, headeredEvent := range stateResp.StateEvents {
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events = append(events, headeredEvent.Unwrap())
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}
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if err := checkAllowedByState(e, events); err != nil {
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if err := checkAllowedByState(e, gomatrixserverlib.UnwrapEventHeaders(stateResp.StateEvents)); err != nil {
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return err
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}
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// TODO: Check that the roomserver has a copy of all of the auth_events.
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// TODO: Check that the event is allowed by its auth_events.
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// pass the event to the roomserver
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_, err := t.producer.SendEvents(
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t.context,
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@ -291,7 +313,7 @@ func checkAllowedByState(e gomatrixserverlib.Event, stateEvents []gomatrixserver
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return gomatrixserverlib.Allowed(e, &authUsingState)
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}
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func (t *txnReq) processEventWithMissingState(e gomatrixserverlib.Event, roomVersion gomatrixserverlib.RoomVersion) error {
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func (t *txnReq) processEventWithMissingState(e gomatrixserverlib.Event, roomVersion gomatrixserverlib.RoomVersion, isInboundTxn bool) error {
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// We are missing the previous events for this events.
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// This means that there is a gap in our view of the history of the
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// room. There two ways that we can handle such a gap:
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@ -306,49 +328,315 @@ func (t *txnReq) processEventWithMissingState(e gomatrixserverlib.Event, roomVer
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// event ids and then use /event to fetch the individual events.
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// However not all version of synapse support /state_ids so you may
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// need to fallback to /state.
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// TODO: Attempt to fill in the gap using /get_missing_events
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// Attempt to fetch the missing state using /state_ids and /events
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respState, haveEventIDs, err := t.lookupMissingStateViaStateIDs(e, roomVersion)
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if err != nil {
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// Fallback to /state
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util.GetLogger(t.context).WithError(err).Warn("processEventWithMissingState failed to /state_ids, falling back to /state")
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respState, err = t.lookupMissingStateViaState(e, roomVersion)
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// Attempt to fill in the gap using /get_missing_events
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// This will either:
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// - fill in the gap completely then process event `e` returning no backwards extremity
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// - fail to fill in the gap and tell us to terminate the transaction err=not nil
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// - fail to fill in the gap and tell us to fetch state at the new backwards extremity, and to not terminate the transaction
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backwardsExtremity, err := t.getMissingEvents(e, roomVersion, isInboundTxn)
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if err != nil {
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return err
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}
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if backwardsExtremity == nil {
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// we filled in the gap!
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return nil
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}
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// Check that the event is allowed by the state.
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retryAllowedState:
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if err := checkAllowedByState(e, respState.StateEvents); err != nil {
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switch missing := err.(type) {
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case gomatrixserverlib.MissingAuthEventError:
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// An auth event was missing so let's look up that event over federation
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for _, s := range respState.StateEvents {
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if s.EventID() != missing.AuthEventID {
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continue
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// at this point we know we're going to have a gap: we need to work out the room state at the new backwards extremity.
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// security: we have to do state resolution on the new backwards extremity (TODO: WHY)
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// Therefore, we cannot just query /state_ids with this event to get the state before. Instead, we need to query
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// the state AFTER all the prev_events for this event, then mix in our current room state and apply state resolution
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// to that to get the state before the event.
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var states []*gomatrixserverlib.RespState
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needed := gomatrixserverlib.StateNeededForAuth([]gomatrixserverlib.Event{*backwardsExtremity}).Tuples()
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for _, prevEventID := range backwardsExtremity.PrevEventIDs() {
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var prevState *gomatrixserverlib.RespState
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prevState, err = t.lookupStateAfterEvent(roomVersion, backwardsExtremity.RoomID(), prevEventID, needed)
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if err != nil {
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util.GetLogger(t.context).WithError(err).Errorf("Failed to lookup state after prev_event: %s", prevEventID)
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return err
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}
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err = t.processEventWithMissingState(s, roomVersion)
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// If there was no error retrieving the event from federation then
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// we assume that it succeeded, so retry the original state check
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if err == nil {
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goto retryAllowedState
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states = append(states, prevState)
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}
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// mix in the current room state
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currState, err := t.lookupCurrentState(backwardsExtremity)
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if err != nil {
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util.GetLogger(t.context).WithError(err).Errorf("Failed to lookup current room state")
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return err
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}
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default:
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}
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states = append(states, currState)
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resolvedState, err := t.resolveStatesAndCheck(roomVersion, states, backwardsExtremity)
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if err != nil {
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util.GetLogger(t.context).WithError(err).Errorf("Failed to resolve state conflicts for event %s", backwardsExtremity.EventID())
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return err
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}
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// pass the event along with the state to the roomserver using a background context so we don't
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// needlessly expire
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return t.producer.SendEventWithState(context.Background(), respState, e.Headered(roomVersion), haveEventIDs)
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return t.producer.SendEventWithState(context.Background(), resolvedState, e.Headered(roomVersion), t.haveEventIDs())
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}
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func (t *txnReq) lookupMissingStateViaState(e gomatrixserverlib.Event, roomVersion gomatrixserverlib.RoomVersion) (
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// lookupStateAfterEvent returns the room state after `eventID`, which is the state before eventID with the state of `eventID` (if it's a state event)
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// added into the mix.
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func (t *txnReq) lookupStateAfterEvent(roomVersion gomatrixserverlib.RoomVersion, roomID, eventID string, needed []gomatrixserverlib.StateKeyTuple) (*gomatrixserverlib.RespState, error) {
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// try doing all this locally before we resort to querying federation
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respState := t.lookupStateAfterEventLocally(roomID, eventID, needed)
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if respState != nil {
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return respState, nil
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}
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respState, err := t.lookupStateBeforeEvent(roomVersion, roomID, eventID)
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if err != nil {
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return nil, err
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}
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// fetch the event we're missing and add it to the pile
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h, err := t.lookupEvent(roomVersion, eventID, false)
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if err != nil {
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return nil, err
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}
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t.haveEvents[h.EventID()] = h
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if h.StateKey() != nil {
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addedToState := false
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for i := range respState.StateEvents {
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se := respState.StateEvents[i]
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if se.Type() == h.Type() && se.StateKeyEquals(*h.StateKey()) {
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respState.StateEvents[i] = h.Unwrap()
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addedToState = true
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break
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}
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}
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if !addedToState {
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respState.StateEvents = append(respState.StateEvents, h.Unwrap())
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}
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}
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return respState, nil
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}
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func (t *txnReq) lookupStateAfterEventLocally(roomID, eventID string, needed []gomatrixserverlib.StateKeyTuple) *gomatrixserverlib.RespState {
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var res api.QueryStateAfterEventsResponse
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err := t.rsAPI.QueryStateAfterEvents(t.context, &api.QueryStateAfterEventsRequest{
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RoomID: roomID,
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PrevEventIDs: []string{eventID},
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StateToFetch: needed,
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}, &res)
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if err != nil || !res.PrevEventsExist {
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util.GetLogger(t.context).WithError(err).Warnf("failed to query state after %s locally", eventID)
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return nil
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}
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for i, ev := range res.StateEvents {
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t.haveEvents[ev.EventID()] = &res.StateEvents[i]
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}
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var authEvents []gomatrixserverlib.Event
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missingAuthEvents := make(map[string]bool)
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for _, ev := range res.StateEvents {
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for _, ae := range ev.AuthEventIDs() {
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aev, ok := t.haveEvents[ae]
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if ok {
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authEvents = append(authEvents, aev.Unwrap())
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} else {
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missingAuthEvents[ae] = true
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}
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}
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}
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// QueryStateAfterEvents does not return the auth events, so fetch them now. We know the roomserver has them else it wouldn't
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// have stored the event.
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var missingEventList []string
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for evID := range missingAuthEvents {
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missingEventList = append(missingEventList, evID)
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}
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queryReq := api.QueryEventsByIDRequest{
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EventIDs: missingEventList,
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}
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util.GetLogger(t.context).Infof("Fetching missing auth events: %v", missingEventList)
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var queryRes api.QueryEventsByIDResponse
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if err = t.rsAPI.QueryEventsByID(t.context, &queryReq, &queryRes); err != nil {
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return nil
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}
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for i := range queryRes.Events {
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evID := queryRes.Events[i].EventID()
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t.haveEvents[evID] = &queryRes.Events[i]
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authEvents = append(authEvents, queryRes.Events[i].Unwrap())
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}
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evs := gomatrixserverlib.UnwrapEventHeaders(res.StateEvents)
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return &gomatrixserverlib.RespState{
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StateEvents: evs,
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AuthEvents: authEvents,
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}
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}
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func (t *txnReq) lookupCurrentState(newEvent *gomatrixserverlib.Event) (*gomatrixserverlib.RespState, error) {
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// Ask the roomserver for information about this room
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queryReq := api.QueryLatestEventsAndStateRequest{
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RoomID: newEvent.RoomID(),
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StateToFetch: gomatrixserverlib.StateNeededForAuth([]gomatrixserverlib.Event{*newEvent}).Tuples(),
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}
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var queryRes api.QueryLatestEventsAndStateResponse
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if err := t.rsAPI.QueryLatestEventsAndState(t.context, &queryReq, &queryRes); err != nil {
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return nil, fmt.Errorf("lookupCurrentState rsAPI.QueryLatestEventsAndState: %w", err)
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}
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evs := gomatrixserverlib.UnwrapEventHeaders(queryRes.StateEvents)
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return &gomatrixserverlib.RespState{
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StateEvents: evs,
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AuthEvents: evs,
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}, nil
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}
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|
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// lookuptStateBeforeEvent returns the room state before the event e, which is just /state_ids and/or /state depending on what
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// the server supports.
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func (t *txnReq) lookupStateBeforeEvent(roomVersion gomatrixserverlib.RoomVersion, roomID, eventID string) (
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respState *gomatrixserverlib.RespState, err error) {
|
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state, err := t.federation.LookupState(t.context, t.Origin, e.RoomID(), e.EventID(), roomVersion)
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util.GetLogger(t.context).Infof("lookupStateBeforeEvent %s", eventID)
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// Attempt to fetch the missing state using /state_ids and /events
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respState, err = t.lookupMissingStateViaStateIDs(roomID, eventID, roomVersion)
|
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if err != nil {
|
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// Fallback to /state
|
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util.GetLogger(t.context).WithError(err).Warn("lookupStateBeforeEvent failed to /state_ids, falling back to /state")
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respState, err = t.lookupMissingStateViaState(roomID, eventID, roomVersion)
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}
|
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return
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}
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|
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func (t *txnReq) resolveStatesAndCheck(roomVersion gomatrixserverlib.RoomVersion, states []*gomatrixserverlib.RespState, backwardsExtremity *gomatrixserverlib.Event) (*gomatrixserverlib.RespState, error) {
|
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var authEventList []gomatrixserverlib.Event
|
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var stateEventList []gomatrixserverlib.Event
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for _, state := range states {
|
||||
authEventList = append(authEventList, state.AuthEvents...)
|
||||
stateEventList = append(stateEventList, state.StateEvents...)
|
||||
}
|
||||
resolvedStateEvents, err := gomatrixserverlib.ResolveConflicts(roomVersion, stateEventList, authEventList)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// apply the current event
|
||||
retryAllowedState:
|
||||
if err = checkAllowedByState(*backwardsExtremity, resolvedStateEvents); err != nil {
|
||||
switch missing := err.(type) {
|
||||
case gomatrixserverlib.MissingAuthEventError:
|
||||
h, err2 := t.lookupEvent(roomVersion, missing.AuthEventID, true)
|
||||
if err2 != nil {
|
||||
return nil, fmt.Errorf("missing auth event %s and failed to look it up: %w", missing.AuthEventID, err2)
|
||||
}
|
||||
util.GetLogger(t.context).Infof("fetched event %s", missing.AuthEventID)
|
||||
resolvedStateEvents = append(resolvedStateEvents, h.Unwrap())
|
||||
goto retryAllowedState
|
||||
default:
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
return &gomatrixserverlib.RespState{
|
||||
AuthEvents: authEventList,
|
||||
StateEvents: resolvedStateEvents,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// getMissingEvents returns a nil backwardsExtremity if missing events were fetched and handled, else returns the new backwards extremity which we should
|
||||
// begin from. Returns an error only if we should terminate the transaction which initiated /get_missing_events
|
||||
// This function recursively calls txnReq.processEvent with the missing events, which will be processed before this function returns.
|
||||
// This means that we may recursively call this function, as we spider back up prev_events to the min depth.
|
||||
func (t *txnReq) getMissingEvents(e gomatrixserverlib.Event, roomVersion gomatrixserverlib.RoomVersion, isInboundTxn bool) (backwardsExtremity *gomatrixserverlib.Event, err error) {
|
||||
if !isInboundTxn {
|
||||
// we've recursed here, so just take a state snapshot please!
|
||||
return &e, nil
|
||||
}
|
||||
logger := util.GetLogger(t.context).WithField("event_id", e.EventID()).WithField("room_id", e.RoomID())
|
||||
needed := gomatrixserverlib.StateNeededForAuth([]gomatrixserverlib.Event{e})
|
||||
// query latest events (our trusted forward extremities)
|
||||
req := api.QueryLatestEventsAndStateRequest{
|
||||
RoomID: e.RoomID(),
|
||||
StateToFetch: needed.Tuples(),
|
||||
}
|
||||
var res api.QueryLatestEventsAndStateResponse
|
||||
if err = t.rsAPI.QueryLatestEventsAndState(t.context, &req, &res); err != nil {
|
||||
logger.WithError(err).Warn("Failed to query latest events")
|
||||
return &e, nil
|
||||
}
|
||||
latestEvents := make([]string, len(res.LatestEvents))
|
||||
for i := range res.LatestEvents {
|
||||
latestEvents[i] = res.LatestEvents[i].EventID
|
||||
}
|
||||
// this server just sent us an event for which we do not know its prev_events - ask that server for those prev_events.
|
||||
minDepth := int(res.Depth) - 20
|
||||
if minDepth < 0 {
|
||||
minDepth = 0
|
||||
}
|
||||
missingResp, err := t.federation.LookupMissingEvents(t.context, t.Origin, e.RoomID(), gomatrixserverlib.MissingEvents{
|
||||
Limit: 20,
|
||||
// synapse uses the min depth they've ever seen in that room
|
||||
MinDepth: minDepth,
|
||||
// The latest event IDs that the sender already has. These are skipped when retrieving the previous events of latest_events.
|
||||
EarliestEvents: latestEvents,
|
||||
// The event IDs to retrieve the previous events for.
|
||||
LatestEvents: []string{e.EventID()},
|
||||
}, roomVersion)
|
||||
|
||||
// security: how we handle failures depends on whether or not this event will become the new forward extremity for the room.
|
||||
// There's 2 scenarios to consider:
|
||||
// - Case A: We got pushed an event and are now fetching missing prev_events. (isInboundTxn=true)
|
||||
// - Case B: We are fetching missing prev_events already and now fetching some more (isInboundTxn=false)
|
||||
// In Case B, we know for sure that the event we are currently processing will not become the new forward extremity for the room,
|
||||
// as it was called in response to an inbound txn which had it as a prev_event.
|
||||
// In Case A, the event is a forward extremity, and could eventually become the _only_ forward extremity in the room. This is bad
|
||||
// because it means we would trust the state at that event to be the state for the entire room, and allows rooms to be hijacked.
|
||||
// https://github.com/matrix-org/synapse/pull/3456
|
||||
// https://github.com/matrix-org/synapse/blob/229eb81498b0fe1da81e9b5b333a0285acde9446/synapse/handlers/federation.py#L335
|
||||
// For now, we do not allow Case B, so reject the event.
|
||||
if err != nil {
|
||||
logger.WithError(err).Errorf(
|
||||
"%s pushed us an event but couldn't give us details about prev_events via /get_missing_events - dropping this event until it can",
|
||||
t.Origin,
|
||||
)
|
||||
return nil, missingPrevEventsError{
|
||||
eventID: e.EventID(),
|
||||
err: err,
|
||||
}
|
||||
}
|
||||
logger.Infof("get_missing_events returned %d events", len(missingResp.Events))
|
||||
|
||||
// topologically sort and sanity check that we are making forward progress
|
||||
newEvents := gomatrixserverlib.ReverseTopologicalOrdering(missingResp.Events, gomatrixserverlib.TopologicalOrderByPrevEvents)
|
||||
shouldHaveSomeEventIDs := e.PrevEventIDs()
|
||||
hasPrevEvent := false
|
||||
Event:
|
||||
for _, pe := range shouldHaveSomeEventIDs {
|
||||
for _, ev := range newEvents {
|
||||
if ev.EventID() == pe {
|
||||
hasPrevEvent = true
|
||||
break Event
|
||||
}
|
||||
}
|
||||
}
|
||||
if !hasPrevEvent {
|
||||
err = fmt.Errorf("called /get_missing_events but server %s didn't return any prev_events with IDs %v", t.Origin, shouldHaveSomeEventIDs)
|
||||
logger.WithError(err).Errorf(
|
||||
"%s pushed us an event but couldn't give us details about prev_events via /get_missing_events - dropping this event until it can",
|
||||
t.Origin,
|
||||
)
|
||||
return nil, missingPrevEventsError{
|
||||
eventID: e.EventID(),
|
||||
err: err,
|
||||
}
|
||||
}
|
||||
// process the missing events then the event which started this whole thing
|
||||
for _, ev := range append(newEvents, e) {
|
||||
err := t.processEvent(ev, false)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
// we processed everything!
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
func (t *txnReq) lookupMissingStateViaState(roomID, eventID string, roomVersion gomatrixserverlib.RoomVersion) (
|
||||
respState *gomatrixserverlib.RespState, err error) {
|
||||
state, err := t.federation.LookupState(t.context, t.Origin, roomID, eventID, roomVersion)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
|
@ -359,78 +647,64 @@ func (t *txnReq) lookupMissingStateViaState(e gomatrixserverlib.Event, roomVersi
|
|||
return &state, nil
|
||||
}
|
||||
|
||||
func (t *txnReq) lookupMissingStateViaStateIDs(e gomatrixserverlib.Event, roomVersion gomatrixserverlib.RoomVersion) (
|
||||
*gomatrixserverlib.RespState, map[string]bool, error) {
|
||||
|
||||
func (t *txnReq) lookupMissingStateViaStateIDs(roomID, eventID string, roomVersion gomatrixserverlib.RoomVersion) (
|
||||
*gomatrixserverlib.RespState, error) {
|
||||
util.GetLogger(t.context).Infof("lookupMissingStateViaStateIDs %s", eventID)
|
||||
// fetch the state event IDs at the time of the event
|
||||
stateIDs, err := t.federation.LookupStateIDs(t.context, t.Origin, e.RoomID(), e.EventID())
|
||||
stateIDs, err := t.federation.LookupStateIDs(t.context, t.Origin, roomID, eventID)
|
||||
if err != nil {
|
||||
return nil, nil, err
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// fetch as many as we can from the roomserver, do them as 2 calls rather than
|
||||
// 1 to try to reduce the number of parameters in the bulk query this will use
|
||||
haveEventMap := make(map[string]*gomatrixserverlib.HeaderedEvent, len(stateIDs.StateEventIDs))
|
||||
haveEventIDs := make(map[string]bool)
|
||||
for _, eventList := range [][]string{stateIDs.StateEventIDs, stateIDs.AuthEventIDs} {
|
||||
queryReq := api.QueryEventsByIDRequest{
|
||||
EventIDs: eventList,
|
||||
}
|
||||
var queryRes api.QueryEventsByIDResponse
|
||||
if err = t.rsAPI.QueryEventsByID(t.context, &queryReq, &queryRes); err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
// allow indexing of current state by event ID
|
||||
for i := range queryRes.Events {
|
||||
haveEventMap[queryRes.Events[i].EventID()] = &queryRes.Events[i]
|
||||
haveEventIDs[queryRes.Events[i].EventID()] = true
|
||||
}
|
||||
}
|
||||
|
||||
// work out which auth/state IDs are missing
|
||||
wantIDs := append(stateIDs.StateEventIDs, stateIDs.AuthEventIDs...)
|
||||
missing := make(map[string]bool)
|
||||
var missingEventList []string
|
||||
for _, sid := range wantIDs {
|
||||
if _, ok := haveEventMap[sid]; !ok {
|
||||
if _, ok := t.haveEvents[sid]; !ok {
|
||||
if !missing[sid] {
|
||||
missing[sid] = true
|
||||
missingEventList = append(missingEventList, sid)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// fetch as many as we can from the roomserver
|
||||
queryReq := api.QueryEventsByIDRequest{
|
||||
EventIDs: missingEventList,
|
||||
}
|
||||
var queryRes api.QueryEventsByIDResponse
|
||||
if err = t.rsAPI.QueryEventsByID(t.context, &queryReq, &queryRes); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
for i := range queryRes.Events {
|
||||
evID := queryRes.Events[i].EventID()
|
||||
t.haveEvents[evID] = &queryRes.Events[i]
|
||||
if missing[evID] {
|
||||
delete(missing, evID)
|
||||
}
|
||||
}
|
||||
|
||||
util.GetLogger(t.context).WithFields(logrus.Fields{
|
||||
"missing": len(missing),
|
||||
"event_id": e.EventID(),
|
||||
"room_id": e.RoomID(),
|
||||
"already_have": len(haveEventMap),
|
||||
"event_id": eventID,
|
||||
"room_id": roomID,
|
||||
"total_state": len(stateIDs.StateEventIDs),
|
||||
"total_auth_events": len(stateIDs.AuthEventIDs),
|
||||
}).Info("Fetching missing state at event")
|
||||
|
||||
for missingEventID := range missing {
|
||||
var txn gomatrixserverlib.Transaction
|
||||
txn, err = t.federation.GetEvent(t.context, t.Origin, missingEventID)
|
||||
var h *gomatrixserverlib.HeaderedEvent
|
||||
h, err = t.lookupEvent(roomVersion, missingEventID, false)
|
||||
if err != nil {
|
||||
util.GetLogger(t.context).WithError(err).WithField("event_id", missingEventID).Warn("failed to get missing /event for event ID")
|
||||
return nil, nil, err
|
||||
return nil, err
|
||||
}
|
||||
for _, pdu := range txn.PDUs {
|
||||
var event gomatrixserverlib.Event
|
||||
event, err = gomatrixserverlib.NewEventFromUntrustedJSON(pdu, roomVersion)
|
||||
if err != nil {
|
||||
util.GetLogger(t.context).WithError(err).Warnf("Transaction: Failed to parse event JSON of event %q", event.EventID())
|
||||
return nil, nil, unmarshalError{err}
|
||||
t.haveEvents[h.EventID()] = h
|
||||
}
|
||||
if err = gomatrixserverlib.VerifyAllEventSignatures(t.context, []gomatrixserverlib.Event{event}, t.keys); err != nil {
|
||||
util.GetLogger(t.context).WithError(err).Warnf("Transaction: Couldn't validate signature of event %q", event.EventID())
|
||||
return nil, nil, verifySigError{event.EventID(), err}
|
||||
}
|
||||
h := event.Headered(roomVersion)
|
||||
haveEventMap[event.EventID()] = &h
|
||||
}
|
||||
}
|
||||
resp, err := t.createRespStateFromStateIDs(stateIDs, haveEventMap)
|
||||
return resp, haveEventIDs, err
|
||||
resp, err := t.createRespStateFromStateIDs(stateIDs)
|
||||
return resp, err
|
||||
}
|
||||
|
||||
func (t *txnReq) createRespStateFromStateIDs(stateIDs gomatrixserverlib.RespStateIDs, haveEventMap map[string]*gomatrixserverlib.HeaderedEvent) (
|
||||
func (t *txnReq) createRespStateFromStateIDs(stateIDs gomatrixserverlib.RespStateIDs) (
|
||||
*gomatrixserverlib.RespState, error) {
|
||||
// create a RespState response using the response to /state_ids as a guide
|
||||
respState := gomatrixserverlib.RespState{
|
||||
|
|
@ -439,22 +713,55 @@ func (t *txnReq) createRespStateFromStateIDs(stateIDs gomatrixserverlib.RespStat
|
|||
}
|
||||
|
||||
for i := range stateIDs.StateEventIDs {
|
||||
ev, ok := haveEventMap[stateIDs.StateEventIDs[i]]
|
||||
ev, ok := t.haveEvents[stateIDs.StateEventIDs[i]]
|
||||
if !ok {
|
||||
return nil, fmt.Errorf("missing state event %s", stateIDs.StateEventIDs[i])
|
||||
}
|
||||
respState.StateEvents[i] = ev.Unwrap()
|
||||
}
|
||||
for i := range stateIDs.AuthEventIDs {
|
||||
ev, ok := haveEventMap[stateIDs.AuthEventIDs[i]]
|
||||
ev, ok := t.haveEvents[stateIDs.AuthEventIDs[i]]
|
||||
if !ok {
|
||||
return nil, fmt.Errorf("missing auth event %s", stateIDs.AuthEventIDs[i])
|
||||
}
|
||||
respState.AuthEvents[i] = ev.Unwrap()
|
||||
}
|
||||
// Check that the returned state is valid.
|
||||
if err := respState.Check(t.context, t.keys); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// We purposefully do not do auth checks on the returned events, as they will still
|
||||
// be processed in the exact same way, just as a 'rejected' event
|
||||
// TODO: Add a field to HeaderedEvent to indicate if the event is rejected.
|
||||
return &respState, nil
|
||||
}
|
||||
|
||||
func (t *txnReq) lookupEvent(roomVersion gomatrixserverlib.RoomVersion, missingEventID string, localFirst bool) (*gomatrixserverlib.HeaderedEvent, error) {
|
||||
if localFirst {
|
||||
// fetch from the roomserver
|
||||
queryReq := api.QueryEventsByIDRequest{
|
||||
EventIDs: []string{missingEventID},
|
||||
}
|
||||
var queryRes api.QueryEventsByIDResponse
|
||||
if err := t.rsAPI.QueryEventsByID(t.context, &queryReq, &queryRes); err != nil {
|
||||
util.GetLogger(t.context).Warnf("Failed to query roomserver for missing event %s: %s - falling back to remote", missingEventID, err)
|
||||
} else if len(queryRes.Events) == 1 {
|
||||
return &queryRes.Events[0], nil
|
||||
}
|
||||
}
|
||||
txn, err := t.federation.GetEvent(t.context, t.Origin, missingEventID)
|
||||
if err != nil || len(txn.PDUs) == 0 {
|
||||
util.GetLogger(t.context).WithError(err).WithField("event_id", missingEventID).Warn("failed to get missing /event for event ID")
|
||||
return nil, err
|
||||
}
|
||||
pdu := txn.PDUs[0]
|
||||
var event gomatrixserverlib.Event
|
||||
event, err = gomatrixserverlib.NewEventFromUntrustedJSON(pdu, roomVersion)
|
||||
if err != nil {
|
||||
util.GetLogger(t.context).WithError(err).Warnf("Transaction: Failed to parse event JSON of event %q", event.EventID())
|
||||
return nil, unmarshalError{err}
|
||||
}
|
||||
if err = gomatrixserverlib.VerifyAllEventSignatures(t.context, []gomatrixserverlib.Event{event}, t.keys); err != nil {
|
||||
util.GetLogger(t.context).WithError(err).Warnf("Transaction: Couldn't validate signature of event %q", event.EventID())
|
||||
return nil, verifySigError{event.EventID(), err}
|
||||
}
|
||||
h := event.Headered(roomVersion)
|
||||
t.newEvents[h.EventID()] = true
|
||||
return &h, nil
|
||||
}
|
||||
|
|
|
|||
|
|
@ -5,7 +5,6 @@ import (
|
|||
"encoding/json"
|
||||
"fmt"
|
||||
"reflect"
|
||||
"sort"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
|
|
@ -82,6 +81,7 @@ type testRoomserverAPI struct {
|
|||
inputRoomEvents []api.InputRoomEvent
|
||||
queryStateAfterEvents func(*api.QueryStateAfterEventsRequest) api.QueryStateAfterEventsResponse
|
||||
queryEventsByID func(req *api.QueryEventsByIDRequest) api.QueryEventsByIDResponse
|
||||
queryLatestEventsAndState func(*api.QueryLatestEventsAndStateRequest) api.QueryLatestEventsAndStateResponse
|
||||
}
|
||||
|
||||
func (t *testRoomserverAPI) SetFederationSenderAPI(fsAPI fsAPI.FederationSenderInternalAPI) {}
|
||||
|
|
@ -92,6 +92,9 @@ func (t *testRoomserverAPI) InputRoomEvents(
|
|||
response *api.InputRoomEventsResponse,
|
||||
) error {
|
||||
t.inputRoomEvents = append(t.inputRoomEvents, request.InputRoomEvents...)
|
||||
for _, ire := range request.InputRoomEvents {
|
||||
fmt.Println("InputRoomEvents: ", ire.Event.EventID())
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
|
|
@ -117,6 +120,13 @@ func (t *testRoomserverAPI) QueryLatestEventsAndState(
|
|||
request *api.QueryLatestEventsAndStateRequest,
|
||||
response *api.QueryLatestEventsAndStateResponse,
|
||||
) error {
|
||||
r := t.queryLatestEventsAndState(request)
|
||||
response.QueryLatestEventsAndStateRequest = *request
|
||||
response.RoomExists = r.RoomExists
|
||||
response.RoomVersion = testRoomVersion
|
||||
response.LatestEvents = r.LatestEvents
|
||||
response.StateEvents = r.StateEvents
|
||||
response.Depth = r.Depth
|
||||
return nil
|
||||
}
|
||||
|
||||
|
|
@ -152,7 +162,7 @@ func (t *testRoomserverAPI) QueryMembershipForUser(
|
|||
request *api.QueryMembershipForUserRequest,
|
||||
response *api.QueryMembershipForUserResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Query a list of membership events for a room
|
||||
|
|
@ -161,7 +171,7 @@ func (t *testRoomserverAPI) QueryMembershipsForRoom(
|
|||
request *api.QueryMembershipsForRoomRequest,
|
||||
response *api.QueryMembershipsForRoomResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Query a list of invite event senders for a user in a room.
|
||||
|
|
@ -170,7 +180,7 @@ func (t *testRoomserverAPI) QueryInvitesForUser(
|
|||
request *api.QueryInvitesForUserRequest,
|
||||
response *api.QueryInvitesForUserResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Query whether a server is allowed to see an event
|
||||
|
|
@ -179,7 +189,7 @@ func (t *testRoomserverAPI) QueryServerAllowedToSeeEvent(
|
|||
request *api.QueryServerAllowedToSeeEventRequest,
|
||||
response *api.QueryServerAllowedToSeeEventResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Query missing events for a room from roomserver
|
||||
|
|
@ -188,7 +198,7 @@ func (t *testRoomserverAPI) QueryMissingEvents(
|
|||
request *api.QueryMissingEventsRequest,
|
||||
response *api.QueryMissingEventsResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Query to get state and auth chain for a (potentially hypothetical) event.
|
||||
|
|
@ -199,7 +209,7 @@ func (t *testRoomserverAPI) QueryStateAndAuthChain(
|
|||
request *api.QueryStateAndAuthChainRequest,
|
||||
response *api.QueryStateAndAuthChainResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Query a given amount (or less) of events prior to a given set of events.
|
||||
|
|
@ -208,7 +218,7 @@ func (t *testRoomserverAPI) QueryBackfill(
|
|||
request *api.QueryBackfillRequest,
|
||||
response *api.QueryBackfillResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Asks for the default room version as preferred by the server.
|
||||
|
|
@ -217,7 +227,7 @@ func (t *testRoomserverAPI) QueryRoomVersionCapabilities(
|
|||
request *api.QueryRoomVersionCapabilitiesRequest,
|
||||
response *api.QueryRoomVersionCapabilitiesResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Asks for the room version for a given room.
|
||||
|
|
@ -236,7 +246,7 @@ func (t *testRoomserverAPI) SetRoomAlias(
|
|||
req *api.SetRoomAliasRequest,
|
||||
response *api.SetRoomAliasResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Get the room ID for an alias
|
||||
|
|
@ -245,7 +255,7 @@ func (t *testRoomserverAPI) GetRoomIDForAlias(
|
|||
req *api.GetRoomIDForAliasRequest,
|
||||
response *api.GetRoomIDForAliasResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Get all known aliases for a room ID
|
||||
|
|
@ -254,7 +264,7 @@ func (t *testRoomserverAPI) GetAliasesForRoomID(
|
|||
req *api.GetAliasesForRoomIDRequest,
|
||||
response *api.GetAliasesForRoomIDResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Get the user ID of the creator of an alias
|
||||
|
|
@ -263,7 +273,7 @@ func (t *testRoomserverAPI) GetCreatorIDForAlias(
|
|||
req *api.GetCreatorIDForAliasRequest,
|
||||
response *api.GetCreatorIDForAliasResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
// Remove a room alias
|
||||
|
|
@ -272,18 +282,20 @@ func (t *testRoomserverAPI) RemoveRoomAlias(
|
|||
req *api.RemoveRoomAliasRequest,
|
||||
response *api.RemoveRoomAliasResponse,
|
||||
) error {
|
||||
return nil
|
||||
return fmt.Errorf("not implemented")
|
||||
}
|
||||
|
||||
type txnFedClient struct {
|
||||
state map[string]gomatrixserverlib.RespState // event_id to response
|
||||
stateIDs map[string]gomatrixserverlib.RespStateIDs // event_id to response
|
||||
getEvent map[string]gomatrixserverlib.Transaction // event_id to response
|
||||
getMissingEvents func(gomatrixserverlib.MissingEvents) (res gomatrixserverlib.RespMissingEvents, err error)
|
||||
}
|
||||
|
||||
func (c *txnFedClient) LookupState(ctx context.Context, s gomatrixserverlib.ServerName, roomID string, eventID string, roomVersion gomatrixserverlib.RoomVersion) (
|
||||
res gomatrixserverlib.RespState, err error,
|
||||
) {
|
||||
fmt.Println("testFederationClient.LookupState", eventID)
|
||||
r, ok := c.state[eventID]
|
||||
if !ok {
|
||||
err = fmt.Errorf("txnFedClient: no /state for event %s", eventID)
|
||||
|
|
@ -293,6 +305,7 @@ func (c *txnFedClient) LookupState(ctx context.Context, s gomatrixserverlib.Serv
|
|||
return
|
||||
}
|
||||
func (c *txnFedClient) LookupStateIDs(ctx context.Context, s gomatrixserverlib.ServerName, roomID string, eventID string) (res gomatrixserverlib.RespStateIDs, err error) {
|
||||
fmt.Println("testFederationClient.LookupStateIDs", eventID)
|
||||
r, ok := c.stateIDs[eventID]
|
||||
if !ok {
|
||||
err = fmt.Errorf("txnFedClient: no /state_ids for event %s", eventID)
|
||||
|
|
@ -302,6 +315,7 @@ func (c *txnFedClient) LookupStateIDs(ctx context.Context, s gomatrixserverlib.S
|
|||
return
|
||||
}
|
||||
func (c *txnFedClient) GetEvent(ctx context.Context, s gomatrixserverlib.ServerName, eventID string) (res gomatrixserverlib.Transaction, err error) {
|
||||
fmt.Println("testFederationClient.GetEvent", eventID)
|
||||
r, ok := c.getEvent[eventID]
|
||||
if !ok {
|
||||
err = fmt.Errorf("txnFedClient: no /event for event ID %s", eventID)
|
||||
|
|
@ -310,6 +324,10 @@ func (c *txnFedClient) GetEvent(ctx context.Context, s gomatrixserverlib.ServerN
|
|||
res = r
|
||||
return
|
||||
}
|
||||
func (c *txnFedClient) LookupMissingEvents(ctx context.Context, s gomatrixserverlib.ServerName, roomID string, missing gomatrixserverlib.MissingEvents,
|
||||
roomVersion gomatrixserverlib.RoomVersion) (res gomatrixserverlib.RespMissingEvents, err error) {
|
||||
return c.getMissingEvents(missing)
|
||||
}
|
||||
|
||||
func mustCreateTransaction(rsAPI api.RoomserverInternalAPI, fedClient txnFederationClient, pdus []json.RawMessage) *txnReq {
|
||||
t := &txnReq{
|
||||
|
|
@ -319,6 +337,8 @@ func mustCreateTransaction(rsAPI api.RoomserverInternalAPI, fedClient txnFederat
|
|||
eduProducer: producers.NewEDUServerProducer(&testEDUProducer{}),
|
||||
keys: &testNopJSONVerifier{},
|
||||
federation: fedClient,
|
||||
haveEvents: make(map[string]*gomatrixserverlib.HeaderedEvent),
|
||||
newEvents: make(map[string]bool),
|
||||
}
|
||||
t.PDUs = pdus
|
||||
t.Origin = testOrigin
|
||||
|
|
@ -368,6 +388,9 @@ NextTuple:
|
|||
}
|
||||
|
||||
func assertInputRoomEvents(t *testing.T, got []api.InputRoomEvent, want []gomatrixserverlib.HeaderedEvent) {
|
||||
for _, g := range got {
|
||||
fmt.Println("GOT ", g.Event.EventID())
|
||||
}
|
||||
if len(got) != len(want) {
|
||||
t.Errorf("wrong number of InputRoomEvents: got %d want %d", len(got), len(want))
|
||||
return
|
||||
|
|
@ -424,32 +447,167 @@ func TestTransactionFailAuthChecks(t *testing.T) {
|
|||
assertInputRoomEvents(t, rsAPI.inputRoomEvents, nil) // expect no messages to be sent to the roomserver
|
||||
}
|
||||
|
||||
// The purpose of this test is to check that when there are missing prev_events that state is fetched via /state_ids
|
||||
// and /event and not /state. It works by setting PrevEventsExist=false in the roomserver query response, resulting in
|
||||
// a call to /state_ids which returns the whole room state. It should attempt to fetch as many of these events from the
|
||||
// roomserver FIRST, resulting in a call to QueryEventsByID. However, this will be missing the m.room.power_levels event which
|
||||
// should then be requested via /event. The net result is that the transaction should succeed and there should be 2
|
||||
// new events, first the m.room.power_levels event we were missing, then the transaction PDU.
|
||||
// The purpose of this test is to make sure that when an event is received for which we do not know the prev_events,
|
||||
// we request them from /get_missing_events. It works by setting PrevEventsExist=false in the roomserver query response,
|
||||
// resulting in a call to /get_missing_events which returns the missing prev event. Both events should be processed in
|
||||
// topological order and sent to the roomserver.
|
||||
func TestTransactionFetchMissingPrevEvents(t *testing.T) {
|
||||
haveEvent := testEvents[len(testEvents)-3]
|
||||
prevEvent := testEvents[len(testEvents)-2]
|
||||
inputEvent := testEvents[len(testEvents)-1]
|
||||
|
||||
var rsAPI *testRoomserverAPI // ref here so we can refer to inputRoomEvents inside these functions
|
||||
rsAPI = &testRoomserverAPI{
|
||||
queryStateAfterEvents: func(req *api.QueryStateAfterEventsRequest) api.QueryStateAfterEventsResponse {
|
||||
// we expect this to be called three times:
|
||||
// - first with input event to realise there's a gap
|
||||
// - second with the prevEvent to realise there is no gap
|
||||
// - third with the input event to realise there is no longer a gap
|
||||
prevEventsExist := false
|
||||
if len(req.PrevEventIDs) == 1 {
|
||||
switch req.PrevEventIDs[0] {
|
||||
case haveEvent.EventID():
|
||||
prevEventsExist = true
|
||||
case prevEvent.EventID():
|
||||
// we only have this event if we've been send prevEvent
|
||||
if len(rsAPI.inputRoomEvents) == 1 && rsAPI.inputRoomEvents[0].Event.EventID() == prevEvent.EventID() {
|
||||
prevEventsExist = true
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return api.QueryStateAfterEventsResponse{
|
||||
PrevEventsExist: prevEventsExist,
|
||||
RoomExists: true,
|
||||
StateEvents: fromStateTuples(req.StateToFetch, nil),
|
||||
}
|
||||
},
|
||||
queryLatestEventsAndState: func(req *api.QueryLatestEventsAndStateRequest) api.QueryLatestEventsAndStateResponse {
|
||||
return api.QueryLatestEventsAndStateResponse{
|
||||
RoomExists: true,
|
||||
Depth: haveEvent.Depth(),
|
||||
LatestEvents: []gomatrixserverlib.EventReference{
|
||||
haveEvent.EventReference(),
|
||||
},
|
||||
StateEvents: fromStateTuples(req.StateToFetch, nil),
|
||||
}
|
||||
},
|
||||
}
|
||||
|
||||
cli := &txnFedClient{
|
||||
getMissingEvents: func(missing gomatrixserverlib.MissingEvents) (res gomatrixserverlib.RespMissingEvents, err error) {
|
||||
if !reflect.DeepEqual(missing.EarliestEvents, []string{haveEvent.EventID()}) {
|
||||
t.Errorf("call to /get_missing_events wrong earliest events: got %v want %v", missing.EarliestEvents, haveEvent.EventID())
|
||||
}
|
||||
if !reflect.DeepEqual(missing.LatestEvents, []string{inputEvent.EventID()}) {
|
||||
t.Errorf("call to /get_missing_events wrong latest events: got %v want %v", missing.LatestEvents, inputEvent.EventID())
|
||||
}
|
||||
return gomatrixserverlib.RespMissingEvents{
|
||||
Events: []gomatrixserverlib.Event{
|
||||
prevEvent.Unwrap(),
|
||||
},
|
||||
}, nil
|
||||
},
|
||||
}
|
||||
|
||||
pdus := []json.RawMessage{
|
||||
inputEvent.JSON(),
|
||||
}
|
||||
txn := mustCreateTransaction(rsAPI, cli, pdus)
|
||||
mustProcessTransaction(t, txn, nil)
|
||||
assertInputRoomEvents(t, rsAPI.inputRoomEvents, []gomatrixserverlib.HeaderedEvent{prevEvent, inputEvent})
|
||||
}
|
||||
|
||||
// The purpose of this test is to check that when there are missing prev_events and we still haven't been able to fill
|
||||
// in the hole with /get_missing_events that the state BEFORE the events we want to persist is fetched via /state_ids
|
||||
// and /event. It works by setting PrevEventsExist=false in the roomserver query response, resulting in
|
||||
// a call to /get_missing_events which returns 1 out of the 2 events it needs to fill in the gap. Synapse and Dendrite
|
||||
// both give up after 1x /get_missing_events call, relying on requesting the state AFTER the missing event in order to
|
||||
// continue. The DAG looks something like:
|
||||
// FE GME TXN
|
||||
// A ---> B ---> C ---> D
|
||||
// TXN=event in the txn, GME=response to /get_missing_events, FE=roomserver's forward extremity. Should result in:
|
||||
// - /state_ids?event=B is requested, then /event/B to get the state AFTER B. B is a state event.
|
||||
// - state resolution is done to check C is allowed.
|
||||
// This results in B being sent as an outlier FIRST, then C,D.
|
||||
func TestTransactionFetchMissingStateByStateIDs(t *testing.T) {
|
||||
missingStateEvent := testStateEvents[gomatrixserverlib.StateKeyTuple{
|
||||
eventA := testEvents[len(testEvents)-5]
|
||||
// this is also len(testEvents)-4
|
||||
eventB := testStateEvents[gomatrixserverlib.StateKeyTuple{
|
||||
EventType: gomatrixserverlib.MRoomPowerLevels,
|
||||
StateKey: "",
|
||||
}]
|
||||
rsAPI := &testRoomserverAPI{
|
||||
eventC := testEvents[len(testEvents)-3]
|
||||
eventD := testEvents[len(testEvents)-2]
|
||||
fmt.Println("a:", eventA.EventID())
|
||||
fmt.Println("b:", eventB.EventID())
|
||||
fmt.Println("c:", eventC.EventID())
|
||||
fmt.Println("d:", eventD.EventID())
|
||||
var rsAPI *testRoomserverAPI
|
||||
rsAPI = &testRoomserverAPI{
|
||||
queryStateAfterEvents: func(req *api.QueryStateAfterEventsRequest) api.QueryStateAfterEventsResponse {
|
||||
omitTuples := []gomatrixserverlib.StateKeyTuple{
|
||||
{
|
||||
EventType: gomatrixserverlib.MRoomPowerLevels,
|
||||
StateKey: "",
|
||||
},
|
||||
}
|
||||
askingForEvent := req.PrevEventIDs[0]
|
||||
haveEventB := false
|
||||
haveEventC := false
|
||||
for _, ev := range rsAPI.inputRoomEvents {
|
||||
switch ev.Event.EventID() {
|
||||
case eventB.EventID():
|
||||
haveEventB = true
|
||||
omitTuples = nil // include event B now
|
||||
case eventC.EventID():
|
||||
haveEventC = true
|
||||
}
|
||||
}
|
||||
prevEventExists := false
|
||||
if askingForEvent == eventC.EventID() {
|
||||
prevEventExists = haveEventC
|
||||
} else if askingForEvent == eventB.EventID() {
|
||||
prevEventExists = haveEventB
|
||||
}
|
||||
var stateEvents []gomatrixserverlib.HeaderedEvent
|
||||
if prevEventExists {
|
||||
stateEvents = fromStateTuples(req.StateToFetch, omitTuples)
|
||||
}
|
||||
return api.QueryStateAfterEventsResponse{
|
||||
// setting this to false should trigger a call to /state_ids
|
||||
PrevEventsExist: false,
|
||||
PrevEventsExist: prevEventExists,
|
||||
RoomExists: true,
|
||||
StateEvents: nil,
|
||||
StateEvents: stateEvents,
|
||||
}
|
||||
},
|
||||
queryLatestEventsAndState: func(req *api.QueryLatestEventsAndStateRequest) api.QueryLatestEventsAndStateResponse {
|
||||
omitTuples := []gomatrixserverlib.StateKeyTuple{
|
||||
{EventType: gomatrixserverlib.MRoomPowerLevels, StateKey: ""},
|
||||
}
|
||||
return api.QueryLatestEventsAndStateResponse{
|
||||
RoomExists: true,
|
||||
Depth: eventA.Depth(),
|
||||
LatestEvents: []gomatrixserverlib.EventReference{
|
||||
eventA.EventReference(),
|
||||
},
|
||||
StateEvents: fromStateTuples(req.StateToFetch, omitTuples),
|
||||
}
|
||||
},
|
||||
queryEventsByID: func(req *api.QueryEventsByIDRequest) api.QueryEventsByIDResponse {
|
||||
var res api.QueryEventsByIDResponse
|
||||
fmt.Println("queryEventsByID ", req.EventIDs)
|
||||
for _, wantEventID := range req.EventIDs {
|
||||
for _, ev := range testStateEvents {
|
||||
// roomserver is missing the power levels event
|
||||
if wantEventID == missingStateEvent.EventID() {
|
||||
// roomserver is missing the power levels event unless it's been sent to us recently as an outlier
|
||||
if wantEventID == eventB.EventID() {
|
||||
fmt.Println("Asked for pl event")
|
||||
for _, inEv := range rsAPI.inputRoomEvents {
|
||||
fmt.Println("recv ", inEv.Event.EventID())
|
||||
if inEv.Event.EventID() == wantEventID {
|
||||
res.Events = append(res.Events, inEv.Event)
|
||||
break
|
||||
}
|
||||
}
|
||||
continue
|
||||
}
|
||||
if ev.EventID() == wantEventID {
|
||||
|
|
@ -461,91 +619,55 @@ func TestTransactionFetchMissingStateByStateIDs(t *testing.T) {
|
|||
return res
|
||||
},
|
||||
}
|
||||
inputEvent := testEvents[len(testEvents)-1]
|
||||
// /state_ids for event B returns every state event but B (it's the state before)
|
||||
var authEventIDs []string
|
||||
var stateEventIDs []string
|
||||
for _, ev := range testStateEvents {
|
||||
if ev.EventID() == eventB.EventID() {
|
||||
continue
|
||||
}
|
||||
// state res checks what auth events you give it, and this isn't a valid auth event
|
||||
if ev.Type() != gomatrixserverlib.MRoomHistoryVisibility {
|
||||
authEventIDs = append(authEventIDs, ev.EventID())
|
||||
}
|
||||
stateEventIDs = append(stateEventIDs, ev.EventID())
|
||||
}
|
||||
cli := &txnFedClient{
|
||||
// /state_ids returns all the state events
|
||||
stateIDs: map[string]gomatrixserverlib.RespStateIDs{
|
||||
inputEvent.EventID(): gomatrixserverlib.RespStateIDs{
|
||||
eventB.EventID(): {
|
||||
StateEventIDs: stateEventIDs,
|
||||
AuthEventIDs: stateEventIDs,
|
||||
AuthEventIDs: authEventIDs,
|
||||
},
|
||||
},
|
||||
// /event for the missing state event returns it
|
||||
// /event for event B returns it
|
||||
getEvent: map[string]gomatrixserverlib.Transaction{
|
||||
missingStateEvent.EventID(): gomatrixserverlib.Transaction{
|
||||
eventB.EventID(): {
|
||||
PDUs: []json.RawMessage{
|
||||
missingStateEvent.JSON(),
|
||||
eventB.JSON(),
|
||||
},
|
||||
},
|
||||
},
|
||||
// /get_missing_events should be done exactly once
|
||||
getMissingEvents: func(missing gomatrixserverlib.MissingEvents) (res gomatrixserverlib.RespMissingEvents, err error) {
|
||||
if !reflect.DeepEqual(missing.EarliestEvents, []string{eventA.EventID()}) {
|
||||
t.Errorf("call to /get_missing_events wrong earliest events: got %v want %v", missing.EarliestEvents, eventA.EventID())
|
||||
}
|
||||
if !reflect.DeepEqual(missing.LatestEvents, []string{eventD.EventID()}) {
|
||||
t.Errorf("call to /get_missing_events wrong latest events: got %v want %v", missing.LatestEvents, eventD.EventID())
|
||||
}
|
||||
// just return event C, not event B so /state_ids logic kicks in as there will STILL be missing prev_events
|
||||
return gomatrixserverlib.RespMissingEvents{
|
||||
Events: []gomatrixserverlib.Event{
|
||||
eventC.Unwrap(),
|
||||
},
|
||||
}, nil
|
||||
},
|
||||
}
|
||||
|
||||
pdus := []json.RawMessage{
|
||||
testData[len(testData)-1], // a message event
|
||||
eventD.JSON(),
|
||||
}
|
||||
txn := mustCreateTransaction(rsAPI, cli, pdus)
|
||||
mustProcessTransaction(t, txn, nil)
|
||||
assertInputRoomEvents(t, rsAPI.inputRoomEvents, []gomatrixserverlib.HeaderedEvent{missingStateEvent, inputEvent})
|
||||
}
|
||||
|
||||
// The purpose of this test is to check that when there are missing prev_events and /state_ids fails, that we fallback to
|
||||
// calling /state which returns the entire room state at that event. It works by setting PrevEventsExist=false in the
|
||||
// roomserver query response, resulting in a call to /state_ids which fails (unset). It should then fetch via /state.
|
||||
func TestTransactionFetchMissingStateByFallbackState(t *testing.T) {
|
||||
rsAPI := &testRoomserverAPI{
|
||||
queryStateAfterEvents: func(req *api.QueryStateAfterEventsRequest) api.QueryStateAfterEventsResponse {
|
||||
return api.QueryStateAfterEventsResponse{
|
||||
// setting this to false should trigger a call to /state_ids
|
||||
PrevEventsExist: false,
|
||||
RoomExists: true,
|
||||
StateEvents: nil,
|
||||
}
|
||||
},
|
||||
}
|
||||
inputEvent := testEvents[len(testEvents)-1]
|
||||
// first 5 events are the state events, in auth event order.
|
||||
stateEvents := testEvents[:5]
|
||||
|
||||
cli := &txnFedClient{
|
||||
// /state_ids purposefully unset
|
||||
stateIDs: nil,
|
||||
// /state returns the state at that event (which is the current state)
|
||||
state: map[string]gomatrixserverlib.RespState{
|
||||
inputEvent.EventID(): gomatrixserverlib.RespState{
|
||||
AuthEvents: gomatrixserverlib.UnwrapEventHeaders(stateEvents),
|
||||
StateEvents: gomatrixserverlib.UnwrapEventHeaders(stateEvents),
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
pdus := []json.RawMessage{
|
||||
testData[len(testData)-1], // a message event
|
||||
}
|
||||
txn := mustCreateTransaction(rsAPI, cli, pdus)
|
||||
mustProcessTransaction(t, txn, nil)
|
||||
// the roomserver should get all state events and the new input event
|
||||
// TODO: it should really be only giving the missing ones
|
||||
got := rsAPI.inputRoomEvents
|
||||
if len(got) != len(stateEvents)+1 {
|
||||
t.Fatalf("wrong number of InputRoomEvents: got %d want %d", len(got), len(stateEvents)+1)
|
||||
}
|
||||
last := got[len(got)-1]
|
||||
if last.Event.EventID() != inputEvent.EventID() {
|
||||
t.Errorf("last event should be the input event but it wasn't. got %s want %s", last.Event.EventID(), inputEvent.EventID())
|
||||
}
|
||||
gots := make([]string, len(stateEvents))
|
||||
wants := make([]string, len(stateEvents))
|
||||
for i := range stateEvents {
|
||||
gots[i] = got[i].Event.EventID()
|
||||
wants[i] = stateEvents[i].EventID()
|
||||
}
|
||||
sort.Strings(gots)
|
||||
sort.Strings(wants)
|
||||
if !reflect.DeepEqual(gots, wants) {
|
||||
t.Errorf("state events returned mismatch, got (sorted): %+v want %+v", gots, wants)
|
||||
}
|
||||
assertInputRoomEvents(t, rsAPI.inputRoomEvents, []gomatrixserverlib.HeaderedEvent{eventB, eventC, eventD})
|
||||
}
|
||||
|
|
|
|||
|
|
@ -55,7 +55,7 @@ func processRoomEvent(
|
|||
// Check that the event passes authentication checks and work out the numeric IDs for the auth events.
|
||||
authEventNIDs, err := checkAuthEvents(ctx, db, headered, input.AuthEventIDs)
|
||||
if err != nil {
|
||||
logrus.WithError(err).WithField("event_id", event.EventID()).Error("processRoomEvent.checkAuthEvents failed for event")
|
||||
logrus.WithError(err).WithField("event_id", event.EventID()).WithField("auth_event_ids", input.AuthEventIDs).Error("processRoomEvent.checkAuthEvents failed for event")
|
||||
return
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -264,4 +264,11 @@ User can invite local user to room with version 5
|
|||
remote user can join room with version 5
|
||||
User can invite remote user to room with version 5
|
||||
Remote user can backfill in a room with version 5
|
||||
Inbound federation can receive v1 /send_join
|
||||
Inbound federation can get state for a room
|
||||
Inbound federation of state requires event_id as a mandatory paramater
|
||||
Inbound federation can get state_ids for a room
|
||||
Inbound federation of state_ids requires event_id as a mandatory paramater
|
||||
Federation rejects inbound events where the prev_events cannot be found
|
||||
Outbound federation requests missing prev_events and then asks for /state_ids and resolves the state
|
||||
Alternative server names do not cause a routing loop
|
||||
|
|
|
|||
Loading…
Reference in a new issue