dendrite/federationsender/queue/queue.go

238 lines
6.8 KiB
Go

// Copyright 2017 Vector Creations Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package queue
import (
"context"
"crypto/ed25519"
"encoding/json"
"fmt"
"sync"
"github.com/matrix-org/dendrite/federationsender/storage"
"github.com/matrix-org/dendrite/federationsender/types"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
log "github.com/sirupsen/logrus"
)
// OutgoingQueues is a collection of queues for sending transactions to other
// matrix servers
type OutgoingQueues struct {
db storage.Database
rsAPI api.RoomserverInternalAPI
origin gomatrixserverlib.ServerName
client *gomatrixserverlib.FederationClient
statistics *types.Statistics
signing *SigningInfo
queuesMutex sync.Mutex // protects the below
queues map[gomatrixserverlib.ServerName]*destinationQueue
}
// NewOutgoingQueues makes a new OutgoingQueues
func NewOutgoingQueues(
db storage.Database,
origin gomatrixserverlib.ServerName,
client *gomatrixserverlib.FederationClient,
rsAPI api.RoomserverInternalAPI,
statistics *types.Statistics,
signing *SigningInfo,
) *OutgoingQueues {
queues := &OutgoingQueues{
db: db,
rsAPI: rsAPI,
origin: origin,
client: client,
statistics: statistics,
signing: signing,
queues: map[gomatrixserverlib.ServerName]*destinationQueue{},
}
// Look up which servers we have pending items for and then rehydrate those queues.
if serverNames, err := db.GetPendingServerNames(context.Background()); err == nil {
for _, serverName := range serverNames {
queues.getQueue(serverName).wakeQueueIfNeeded()
}
} else {
log.WithError(err).Error("Failed to get server names for destination queue hydration")
}
return queues
}
// TODO: Move this somewhere useful for other components as we often need to ferry these 3 variables
// around together
type SigningInfo struct {
ServerName gomatrixserverlib.ServerName
KeyID gomatrixserverlib.KeyID
PrivateKey ed25519.PrivateKey
}
func (oqs *OutgoingQueues) getQueueIfExists(destination gomatrixserverlib.ServerName) *destinationQueue {
oqs.queuesMutex.Lock()
defer oqs.queuesMutex.Unlock()
return oqs.queues[destination]
}
func (oqs *OutgoingQueues) getQueue(destination gomatrixserverlib.ServerName) *destinationQueue {
oqs.queuesMutex.Lock()
defer oqs.queuesMutex.Unlock()
oq := oqs.queues[destination]
if oq == nil {
oq = &destinationQueue{
db: oqs.db,
rsAPI: oqs.rsAPI,
origin: oqs.origin,
destination: destination,
client: oqs.client,
statistics: oqs.statistics.ForServer(destination),
incomingEDUs: make(chan *gomatrixserverlib.EDU, 128),
incomingInvites: make(chan *gomatrixserverlib.InviteV2Request, 128),
wakeServerCh: make(chan bool, 128),
retryServerCh: make(chan bool),
signing: oqs.signing,
}
oqs.queues[destination] = oq
}
return oq
}
// SendEvent sends an event to the destinations
func (oqs *OutgoingQueues) SendEvent(
ev *gomatrixserverlib.HeaderedEvent, origin gomatrixserverlib.ServerName,
destinations []gomatrixserverlib.ServerName,
) error {
if origin != oqs.origin {
// TODO: Support virtual hosting; gh issue #577.
return fmt.Errorf(
"sendevent: unexpected server to send as: got %q expected %q",
origin, oqs.origin,
)
}
// Remove our own server from the list of destinations.
destinations = filterAndDedupeDests(oqs.origin, destinations)
if len(destinations) == 0 {
return nil
}
log.WithFields(log.Fields{
"destinations": destinations, "event": ev.EventID(),
}).Info("Sending event")
headeredJSON, err := json.Marshal(ev)
if err != nil {
return fmt.Errorf("json.Marshal: %w", err)
}
nid, err := oqs.db.StoreJSON(context.TODO(), string(headeredJSON))
if err != nil {
return fmt.Errorf("sendevent: oqs.db.StoreJSON: %w", err)
}
for _, destination := range destinations {
oqs.getQueue(destination).sendEvent(nid)
}
return nil
}
// SendEvent sends an event to the destinations
func (oqs *OutgoingQueues) SendInvite(
inviteReq *gomatrixserverlib.InviteV2Request,
) error {
ev := inviteReq.Event()
stateKey := ev.StateKey()
if stateKey == nil {
log.WithFields(log.Fields{
"event_id": ev.EventID(),
}).Info("invite had no state key, dropping")
return nil
}
_, destination, err := gomatrixserverlib.SplitID('@', *stateKey)
if err != nil {
log.WithFields(log.Fields{
"event_id": ev.EventID(),
"state_key": stateKey,
}).Info("failed to split destination from state key")
return nil
}
log.WithFields(log.Fields{
"event_id": ev.EventID(),
"server_name": destination,
}).Info("Sending invite")
oqs.getQueue(destination).sendInvite(inviteReq)
return nil
}
// SendEDU sends an EDU event to the destinations
func (oqs *OutgoingQueues) SendEDU(
e *gomatrixserverlib.EDU, origin gomatrixserverlib.ServerName,
destinations []gomatrixserverlib.ServerName,
) error {
if origin != oqs.origin {
// TODO: Support virtual hosting; gh issue #577.
return fmt.Errorf(
"sendevent: unexpected server to send as: got %q expected %q",
origin, oqs.origin,
)
}
// Remove our own server from the list of destinations.
destinations = filterAndDedupeDests(oqs.origin, destinations)
if len(destinations) > 0 {
log.WithFields(log.Fields{
"destinations": destinations, "edu_type": e.Type,
}).Info("Sending EDU event")
}
for _, destination := range destinations {
oqs.getQueue(destination).sendEDU(e)
}
return nil
}
// RetryServer attempts to resend events to the given server if we had given up.
func (oqs *OutgoingQueues) RetryServer(srv gomatrixserverlib.ServerName) {
q := oqs.getQueueIfExists(srv)
if q == nil {
return
}
q.retry()
}
// filterAndDedupeDests removes our own server from the list of destinations
// and deduplicates any servers in the list that may appear more than once.
func filterAndDedupeDests(origin gomatrixserverlib.ServerName, destinations []gomatrixserverlib.ServerName) (
result []gomatrixserverlib.ServerName,
) {
strs := make([]string, len(destinations))
for i, d := range destinations {
strs[i] = string(d)
}
for _, destination := range util.UniqueStrings(strs) {
if gomatrixserverlib.ServerName(destination) == origin {
continue
}
result = append(result, gomatrixserverlib.ServerName(destination))
}
return result
}