From 794c63e757ce59fb8f934099b6ca2b1ccc0fa31e Mon Sep 17 00:00:00 2001 From: Neil Alexander Date: Tue, 2 Jun 2020 12:42:36 +0100 Subject: [PATCH] Reset backoff on incoming federation (#1080) * Reset backoffs in response to incoming federation requests * Federation wakeups no more than once per minute per origin --- federationapi/routing/routing.go | 42 +++++++++++++++++--------------- internal/httpapi.go | 31 +++++++++++++++++++++++ 2 files changed, 54 insertions(+), 19 deletions(-) diff --git a/federationapi/routing/routing.go b/federationapi/routing/routing.go index 86d3192a2..b75a7941d 100644 --- a/federationapi/routing/routing.go +++ b/federationapi/routing/routing.go @@ -48,7 +48,7 @@ func Setup( asAPI appserviceAPI.AppServiceQueryAPI, producer *producers.RoomserverProducer, eduProducer *producers.EDUServerProducer, - federationSenderAPI federationSenderAPI.FederationSenderInternalAPI, + fsAPI federationSenderAPI.FederationSenderInternalAPI, keys gomatrixserverlib.KeyRing, federation *gomatrixserverlib.FederationClient, accountDB accounts.Database, @@ -58,6 +58,10 @@ func Setup( v1fedmux := publicAPIMux.PathPrefix(pathPrefixV1Federation).Subrouter() v2fedmux := publicAPIMux.PathPrefix(pathPrefixV2Federation).Subrouter() + wakeup := &internal.FederationWakeups{ + FsAPI: fsAPI, + } + localKeys := internal.MakeExternalAPI("localkeys", func(req *http.Request) util.JSONResponse { return LocalKeys(cfg) }) @@ -71,7 +75,7 @@ func Setup( v2keysmux.Handle("/server", localKeys).Methods(http.MethodGet) v1fedmux.Handle("/send/{txnID}", internal.MakeFedAPI( - "federation_send", cfg.Matrix.ServerName, keys, + "federation_send", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -85,7 +89,7 @@ func Setup( )).Methods(http.MethodPut, http.MethodOptions) v2fedmux.Handle("/invite/{roomID}/{eventID}", internal.MakeFedAPI( - "federation_invite", cfg.Matrix.ServerName, keys, + "federation_invite", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -105,7 +109,7 @@ func Setup( )).Methods(http.MethodPost, http.MethodOptions) v1fedmux.Handle("/exchange_third_party_invite/{roomID}", internal.MakeFedAPI( - "exchange_third_party_invite", cfg.Matrix.ServerName, keys, + "exchange_third_party_invite", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -118,7 +122,7 @@ func Setup( )).Methods(http.MethodPut, http.MethodOptions) v1fedmux.Handle("/event/{eventID}", internal.MakeFedAPI( - "federation_get_event", cfg.Matrix.ServerName, keys, + "federation_get_event", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -131,7 +135,7 @@ func Setup( )).Methods(http.MethodGet) v1fedmux.Handle("/state/{roomID}", internal.MakeFedAPI( - "federation_get_state", cfg.Matrix.ServerName, keys, + "federation_get_state", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -144,7 +148,7 @@ func Setup( )).Methods(http.MethodGet) v1fedmux.Handle("/state_ids/{roomID}", internal.MakeFedAPI( - "federation_get_state_ids", cfg.Matrix.ServerName, keys, + "federation_get_state_ids", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -157,7 +161,7 @@ func Setup( )).Methods(http.MethodGet) v1fedmux.Handle("/event_auth/{roomID}/{eventID}", internal.MakeFedAPI( - "federation_get_event_auth", cfg.Matrix.ServerName, keys, + "federation_get_event_auth", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars := mux.Vars(httpReq) return GetEventAuth( @@ -167,16 +171,16 @@ func Setup( )).Methods(http.MethodGet) v1fedmux.Handle("/query/directory", internal.MakeFedAPI( - "federation_query_room_alias", cfg.Matrix.ServerName, keys, + "federation_query_room_alias", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { return RoomAliasToID( - httpReq, federation, cfg, rsAPI, federationSenderAPI, + httpReq, federation, cfg, rsAPI, fsAPI, ) }, )).Methods(http.MethodGet) v1fedmux.Handle("/query/profile", internal.MakeFedAPI( - "federation_query_profile", cfg.Matrix.ServerName, keys, + "federation_query_profile", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { return GetProfile( httpReq, accountDB, cfg, asAPI, @@ -185,7 +189,7 @@ func Setup( )).Methods(http.MethodGet) v1fedmux.Handle("/user/devices/{userID}", internal.MakeFedAPI( - "federation_user_devices", cfg.Matrix.ServerName, keys, + "federation_user_devices", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -198,7 +202,7 @@ func Setup( )).Methods(http.MethodGet) v1fedmux.Handle("/make_join/{roomID}/{eventID}", internal.MakeFedAPI( - "federation_make_join", cfg.Matrix.ServerName, keys, + "federation_make_join", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -227,7 +231,7 @@ func Setup( )).Methods(http.MethodGet) v1fedmux.Handle("/send_join/{roomID}/{eventID}", internal.MakeFedAPI( - "federation_send_join", cfg.Matrix.ServerName, keys, + "federation_send_join", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -249,7 +253,7 @@ func Setup( )).Methods(http.MethodPut) v2fedmux.Handle("/send_join/{roomID}/{eventID}", internal.MakeFedAPI( - "federation_send_join", cfg.Matrix.ServerName, keys, + "federation_send_join", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -264,7 +268,7 @@ func Setup( )).Methods(http.MethodPut) v1fedmux.Handle("/make_leave/{roomID}/{eventID}", internal.MakeFedAPI( - "federation_make_leave", cfg.Matrix.ServerName, keys, + "federation_make_leave", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -279,7 +283,7 @@ func Setup( )).Methods(http.MethodGet) v2fedmux.Handle("/send_leave/{roomID}/{eventID}", internal.MakeFedAPI( - "federation_send_leave", cfg.Matrix.ServerName, keys, + "federation_send_leave", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -301,7 +305,7 @@ func Setup( )).Methods(http.MethodGet) v1fedmux.Handle("/get_missing_events/{roomID}", internal.MakeFedAPI( - "federation_get_missing_events", cfg.Matrix.ServerName, keys, + "federation_get_missing_events", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { @@ -312,7 +316,7 @@ func Setup( )).Methods(http.MethodPost) v1fedmux.Handle("/backfill/{roomID}", internal.MakeFedAPI( - "federation_backfill", cfg.Matrix.ServerName, keys, + "federation_backfill", cfg.Matrix.ServerName, keys, wakeup, func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse { vars, err := internal.URLDecodeMapValues(mux.Vars(httpReq)) if err != nil { diff --git a/internal/httpapi.go b/internal/httpapi.go index 07bbacdd6..bacd1768a 100644 --- a/internal/httpapi.go +++ b/internal/httpapi.go @@ -1,17 +1,20 @@ package internal import ( + "context" "io" "net/http" "net/http/httptest" "net/http/httputil" "os" "strings" + "sync" "time" "github.com/gorilla/mux" "github.com/matrix-org/dendrite/clientapi/auth" "github.com/matrix-org/dendrite/clientapi/auth/authtypes" + federationsenderAPI "github.com/matrix-org/dendrite/federationsender/api" "github.com/matrix-org/dendrite/internal/config" "github.com/matrix-org/dendrite/internal/httpapis" "github.com/matrix-org/gomatrixserverlib" @@ -170,6 +173,7 @@ func MakeFedAPI( metricsName string, serverName gomatrixserverlib.ServerName, keyRing gomatrixserverlib.KeyRing, + wakeup *FederationWakeups, f func(*http.Request, *gomatrixserverlib.FederationRequest) util.JSONResponse, ) http.Handler { h := func(req *http.Request) util.JSONResponse { @@ -179,11 +183,38 @@ func MakeFedAPI( if fedReq == nil { return errResp } + go wakeup.Wakeup(req.Context(), fedReq.Origin()) return f(req, fedReq) } return MakeExternalAPI(metricsName, h) } +type FederationWakeups struct { + FsAPI federationsenderAPI.FederationSenderInternalAPI + origins sync.Map +} + +func (f *FederationWakeups) Wakeup(ctx context.Context, origin gomatrixserverlib.ServerName) { + key, keyok := f.origins.Load(origin) + if keyok { + lastTime, ok := key.(time.Time) + if ok && time.Since(lastTime) < time.Minute { + return + } + } + aliveReq := federationsenderAPI.PerformServersAliveRequest{ + Servers: []gomatrixserverlib.ServerName{origin}, + } + aliveRes := federationsenderAPI.PerformServersAliveResponse{} + if err := f.FsAPI.PerformServersAlive(ctx, &aliveReq, &aliveRes); err != nil { + util.GetLogger(ctx).WithError(err).WithFields(logrus.Fields{ + "origin": origin, + }).Warn("incoming federation request failed to notify server alive") + } else { + f.origins.Store(origin, time.Now()) + } +} + // SetupHTTPAPI registers an HTTP API mux under /api and sets up a metrics // listener. func SetupHTTPAPI(servMux *http.ServeMux, publicApiMux *mux.Router, internalApiMux *mux.Router, cfg *config.Dendrite, enableHTTPAPIs bool) {