Yggdrasil+QUIC demo, federation sender tweaks (#1177)

* Initial QUIC work

* Update Yggdrasil demo

* Make sure that the federation sender knows how many pending events are in the database when the worker starts

* QUIC tunables

* pprof

* Don't spin

* Set build info for Yggdrasil

build/gobind/build.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
 gomobile bind -v \
-    -ldflags "-X $github.com/yggdrasil-network/yggdrasil-go/src/version.buildName=riot-ios-p2p" \
+    -ldflags "-X github.com/yggdrasil-network/yggdrasil-go/src/version.buildName=dendrite" \
     -target ios \
     github.com/matrix-org/dendrite/build/gobind

cmd/dendrite-demo-yggdrasil/main.go

@@ -31,6 +31,7 @@ import (
 	"github.com/matrix-org/dendrite/eduserver"
 	"github.com/matrix-org/dendrite/eduserver/cache"
 	"github.com/matrix-org/dendrite/federationsender"
+	"github.com/matrix-org/dendrite/internal"
 	"github.com/matrix-org/dendrite/internal/config"
 	"github.com/matrix-org/dendrite/internal/httputil"
 	"github.com/matrix-org/dendrite/internal/setup"
@@ -50,6 +51,7 @@ var (
 // nolint:gocyclo
 func main() {
 	flag.Parse()
+	internal.SetupPprof()
 
 	ygg, err := yggconn.Setup(*instanceName, *instancePeer, ".")
 	if err != nil {

cmd/dendrite-demo-yggdrasil/yggconn/node.go

@@ -17,6 +17,7 @@ package yggconn
 import (
 	"context"
 	"crypto/ed25519"
+	"crypto/tls"
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
@@ -26,10 +27,11 @@ import (
 	"os"
 	"strings"
 	"sync"
+	"time"
 
+	"github.com/lucas-clemente/quic-go"
 	"github.com/matrix-org/dendrite/cmd/dendrite-demo-yggdrasil/convert"
 
-	"github.com/libp2p/go-yamux"
 	yggdrasiladmin "github.com/yggdrasil-network/yggdrasil-go/src/admin"
 	yggdrasilconfig "github.com/yggdrasil-network/yggdrasil-go/src/config"
 	yggdrasilmulticast "github.com/yggdrasil-network/yggdrasil-go/src/multicast"
@@ -39,16 +41,26 @@ import (
 )
 
 type Node struct {
-	core      *yggdrasil.Core
+	core       *yggdrasil.Core
-	config    *yggdrasilconfig.NodeConfig
+	config     *yggdrasilconfig.NodeConfig
-	state     *yggdrasilconfig.NodeState
+	state      *yggdrasilconfig.NodeState
-	admin     *yggdrasiladmin.AdminSocket
+	admin      *yggdrasiladmin.AdminSocket
-	multicast *yggdrasilmulticast.Multicast
+	multicast  *yggdrasilmulticast.Multicast
-	log       *gologme.Logger
+	log        *gologme.Logger
-	listener  *yggdrasil.Listener
+	packetConn *yggdrasil.PacketConn
-	dialer    *yggdrasil.Dialer
+	listener   quic.Listener
-	sessions  sync.Map // string -> yamux.Session
+	tlsConfig  *tls.Config
-	incoming  chan *yamux.Stream
+	quicConfig *quic.Config
+	sessions   sync.Map // string -> quic.Session
+	incoming   chan QUICStream
+}
+
+func (n *Node) BuildName() string {
+	return "dendrite"
+}
+
+func (n *Node) BuildVersion() string {
+	return "dev"
 }
 
 func (n *Node) Dialer(_, address string) (net.Conn, error) {
@@ -74,8 +86,9 @@ func Setup(instanceName, instancePeer, storageDirectory string) (*Node, error) {
 		admin:     &yggdrasiladmin.AdminSocket{},
 		multicast: &yggdrasilmulticast.Multicast{},
 		log:       gologme.New(os.Stdout, "YGG ", log.Flags()),
-		incoming:  make(chan *yamux.Stream),
+		incoming:  make(chan QUICStream),
 	}
+	n.core.SetBuildInfo(n)
 
 	yggfile := fmt.Sprintf("%s/%s-yggdrasil.conf", storageDirectory, instanceName)
 	if _, err := os.Stat(yggfile); !os.IsNotExist(err) {
@@ -114,29 +127,21 @@ func Setup(instanceName, instancePeer, storageDirectory string) (*Node, error) {
 			panic(err)
 		}
 	}
-	/*
-		if err = n.admin.Init(n.core, n.state, n.log, nil); err != nil {
-			panic(err)
-		}
-		if err = n.admin.Start(); err != nil {
-			panic(err)
-		}
-	*/
 	if err = n.multicast.Init(n.core, n.state, n.log, nil); err != nil {
 		panic(err)
 	}
 	if err = n.multicast.Start(); err != nil {
 		panic(err)
 	}
-	//n.admin.SetupAdminHandlers(n.admin)
+
-	//n.multicast.SetupAdminHandlers(n.admin)
+	n.packetConn = n.core.PacketConn()
-	n.listener, err = n.core.ConnListen()
+	n.tlsConfig = n.generateTLSConfig()
-	if err != nil {
+	n.quicConfig = &quic.Config{
-		panic(err)
+		MaxIncomingStreams:    0,
-	}
+		MaxIncomingUniStreams: 0,
-	n.dialer, err = n.core.ConnDialer()
+		KeepAlive:             true,
-	if err != nil {
+		MaxIdleTimeout:        time.Second * 120,
-		panic(err)
+		HandshakeTimeout:      time.Second * 30,
 	}
 
 	n.log.Println("Public curve25519:", n.core.EncryptionPublicKey())

cmd/dendrite-demo-yggdrasil/yggconn/session.go

@@ -16,60 +16,52 @@ package yggconn
 
 import (
 	"context"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/hex"
+	"encoding/pem"
+	"errors"
+	"math/big"
 	"net"
-	"strings"
 	"time"
 
-	"github.com/libp2p/go-yamux"
+	"github.com/lucas-clemente/quic-go"
+	"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
 )
 
-func (n *Node) yamuxConfig() *yamux.Config {
-	cfg := yamux.DefaultConfig()
-	cfg.EnableKeepAlive = false
-	cfg.ConnectionWriteTimeout = time.Second * 15
-	cfg.MaxMessageSize = 65535
-	cfg.ReadBufSize = 655350
-	return cfg
-}
-
 func (n *Node) listenFromYgg() {
+	var err error
+	n.listener, err = quic.Listen(
+		n.packetConn, // yggdrasil.PacketConn
+		n.tlsConfig,  // TLS config
+		n.quicConfig, // QUIC config
+	)
+	if err != nil {
+		panic(err)
+	}
+
 	for {
-		conn, err := n.listener.Accept()
+		session, err := n.listener.Accept(context.TODO())
 		if err != nil {
 			n.log.Println("n.listener.Accept:", err)
 			return
 		}
-		var session *yamux.Session
+		go n.listenFromQUIC(session)
-		// If the remote address is lower than ours then we'll be the
-		// server. Otherwse we'll be the client.
-		if strings.Compare(conn.RemoteAddr().String(), n.DerivedSessionName()) < 0 {
-			session, err = yamux.Server(conn, n.yamuxConfig())
-		} else {
-			session, err = yamux.Client(conn, n.yamuxConfig())
-		}
-		if err != nil {
-			return
-		}
-		go n.listenFromYggConn(session)
 	}
 }
 
-func (n *Node) listenFromYggConn(session *yamux.Session) {
+func (n *Node) listenFromQUIC(session quic.Session) {
 	n.sessions.Store(session.RemoteAddr().String(), session)
 	defer n.sessions.Delete(session.RemoteAddr())
-	defer func() {
-		if err := session.Close(); err != nil {
-			n.log.Println("session.Close:", err)
-		}
-	}()
-
 	for {
-		st, err := session.AcceptStream()
+		st, err := session.AcceptStream(context.TODO())
 		if err != nil {
 			n.log.Println("session.AcceptStream:", err)
 			return
 		}
-		n.incoming <- st
+		n.incoming <- QUICStream{st, session}
 	}
 }
 
@@ -96,29 +88,63 @@ func (n *Node) Dial(network, address string) (net.Conn, error) {
 // Implements http.Transport.DialContext
 func (n *Node) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
 	s, ok1 := n.sessions.Load(address)
-	session, ok2 := s.(*yamux.Session)
+	session, ok2 := s.(quic.Session)
-	if !ok1 || !ok2 || (ok1 && ok2 && session.IsClosed()) {
+	if !ok1 || !ok2 || (ok1 && ok2 && session.ConnectionState().HandshakeComplete) {
-		conn, err := n.dialer.DialContext(ctx, network, address)
+		dest, err := hex.DecodeString(address)
+		if err != nil {
+			return nil, err
+		}
+		if len(dest) != crypto.BoxPubKeyLen {
+			return nil, errors.New("invalid key length supplied")
+		}
+		var pubKey crypto.BoxPubKey
+		copy(pubKey[:], dest)
+
+		session, err = quic.Dial(
+			n.packetConn, // yggdrasil.PacketConn
+			&pubKey,      // dial address
+			address,      // dial SNI
+			n.tlsConfig,  // TLS config
+			n.quicConfig, // QUIC config
+		)
 		if err != nil {
 			n.log.Println("n.dialer.DialContext:", err)
 			return nil, err
 		}
-		// If the remote address is lower than ours then we will be the
+		go n.listenFromQUIC(session)
-		// server. Otherwise we'll be the client.
-		if strings.Compare(conn.RemoteAddr().String(), n.DerivedSessionName()) < 0 {
-			session, err = yamux.Server(conn, n.yamuxConfig())
-		} else {
-			session, err = yamux.Client(conn, n.yamuxConfig())
-		}
-		if err != nil {
-			return nil, err
-		}
-		go n.listenFromYggConn(session)
 	}
 	st, err := session.OpenStream()
 	if err != nil {
 		n.log.Println("session.OpenStream:", err)
 		return nil, err
 	}
-	return st, nil
+	return QUICStream{st, session}, nil
+}
+
+func (n *Node) generateTLSConfig() *tls.Config {
+	key, err := rsa.GenerateKey(rand.Reader, 1024)
+	if err != nil {
+		panic(err)
+	}
+	template := x509.Certificate{
+		SerialNumber: big.NewInt(1),
+		NotAfter:     time.Now().Add(time.Hour * 24 * 365),
+		DNSNames:     []string{n.DerivedSessionName()},
+	}
+	certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, &key.PublicKey, key)
+	if err != nil {
+		panic(err)
+	}
+	keyPEM := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)})
+	certPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDER})
+
+	tlsCert, err := tls.X509KeyPair(certPEM, keyPEM)
+	if err != nil {
+		panic(err)
+	}
+	return &tls.Config{
+		Certificates:       []tls.Certificate{tlsCert},
+		NextProtos:         []string{"quic-matrix-ygg"},
+		InsecureSkipVerify: true,
+	}
 }

cmd/dendrite-demo-yggdrasil/yggconn/stream.go

@@ -0,0 +1,20 @@
+package yggconn
+
+import (
+	"net"
+
+	"github.com/lucas-clemente/quic-go"
+)
+
+type QUICStream struct {
+	quic.Stream
+	session quic.Session
+}
+
+func (s QUICStream) LocalAddr() net.Addr {
+	return s.session.LocalAddr()
+}
+
+func (s QUICStream) RemoteAddr() net.Addr {
+	return s.session.RemoteAddr()
+}

federationsender/queue/destinationqueue.go

@@ -52,7 +52,7 @@ type destinationQueue struct {
 	transactionIDMutex sync.Mutex                              // protects transactionID
 	transactionID      gomatrixserverlib.TransactionID         // last transaction ID
 	transactionCount   atomic.Int32                            // how many events in this transaction so far
-	pendingPDUs        atomic.Int32                            // how many PDUs are waiting to be sent
+	pendingPDUs        atomic.Int64                            // how many PDUs are waiting to be sent
 	pendingEDUs        []*gomatrixserverlib.EDU                // owned by backgroundSend
 	pendingInvites     []*gomatrixserverlib.InviteV2Request    // owned by backgroundSend
 	wakeServerCh       chan bool                               // interrupts idle wait
@@ -91,6 +91,7 @@ func (oq *destinationQueue) sendEvent(nid int64) {
 		// If the destination is blacklisted then drop the event.
 		return
 	}
+	oq.wakeQueueIfNeeded()
 	// Create a transaction ID. We'll either do this if we don't have
 	// one made up yet, or if we've exceeded the number of maximum
 	// events allowed in a single tranaction. We'll reset the counter
@@ -117,10 +118,6 @@ func (oq *destinationQueue) sendEvent(nid int64) {
 	// We've successfully added a PDU to the transaction so increase
 	// the counter.
 	oq.transactionCount.Add(1)
-	// If the queue isn't running at this point then start it.
-	if !oq.running.Load() {
-		go oq.backgroundSend()
-	}
 	// Signal that we've sent a new PDU. This will cause the queue to
 	// wake up if it's asleep. The return to the Add function will only
 	// be 1 if the previous value was 0, e.g. nothing was waiting before.
@@ -137,9 +134,7 @@ func (oq *destinationQueue) sendEDU(ev *gomatrixserverlib.EDU) {
 		// If the destination is blacklisted then drop the event.
 		return
 	}
-	if !oq.running.Load() {
+	oq.wakeQueueIfNeeded()
-		go oq.backgroundSend()
-	}
 	oq.incomingEDUs <- ev
 }
 
@@ -151,10 +146,30 @@ func (oq *destinationQueue) sendInvite(ev *gomatrixserverlib.InviteV2Request) {
 		// If the destination is blacklisted then drop the event.
 		return
 	}
+	oq.wakeQueueIfNeeded()
+	oq.incomingInvites <- ev
+}
+
+func (oq *destinationQueue) wakeQueueIfNeeded() {
 	if !oq.running.Load() {
+		// Look up how many events are pending in this queue. We need
+		// to do this so that the queue thinks it has work to do.
+		count, err := oq.db.GetPendingPDUCount(
+			context.TODO(),
+			oq.destination,
+		)
+		if err == nil {
+			oq.pendingPDUs.Store(count)
+			log.Printf("Destination queue %q has %d pending PDUs", oq.destination, count)
+		} else {
+			log.WithError(err).Errorf("Can't get pending PDU count for %q destination queue", oq.destination)
+		}
+		if count > 0 {
+			oq.wakeServerCh <- true
+		}
+		// Then start the queue.
 		go oq.backgroundSend()
 	}
-	oq.incomingInvites <- ev
 }
 
 // backgroundSend is the worker goroutine for sending events.
@@ -170,46 +185,44 @@ func (oq *destinationQueue) backgroundSend() {
 	for {
 		// If we have nothing to do then wait either for incoming events, or
 		// until we hit an idle timeout.
-		if oq.pendingPDUs.Load() == 0 && len(oq.pendingEDUs) == 0 && len(oq.pendingInvites) == 0 {
+		select {
-			select {
+		case <-oq.wakeServerCh:
-			case <-oq.wakeServerCh:
+			// We were woken up because there are new PDUs waiting in the
-				// We were woken up because there are new PDUs waiting in the
+			// database.
-				// database.
+		case edu := <-oq.incomingEDUs:
-			case edu := <-oq.incomingEDUs:
+			// EDUs are handled in-memory for now. We will try to keep
-				// EDUs are handled in-memory for now. We will try to keep
+			// the ordering intact.
-				// the ordering intact.
+			// TODO: Certain EDU types need persistence, e.g. send-to-device
-				// TODO: Certain EDU types need persistence, e.g. send-to-device
+			oq.pendingEDUs = append(oq.pendingEDUs, edu)
-				oq.pendingEDUs = append(oq.pendingEDUs, edu)
+			// If there are any more things waiting in the channel queue
-				// If there are any more things waiting in the channel queue
+			// then read them. This is safe because we guarantee only
-				// then read them. This is safe because we guarantee only
+			// having one goroutine per destination queue, so the channel
-				// having one goroutine per destination queue, so the channel
+			// isn't being consumed anywhere else.
-				// isn't being consumed anywhere else.
+			for len(oq.incomingEDUs) > 0 {
-				for len(oq.incomingEDUs) > 0 {
+				oq.pendingEDUs = append(oq.pendingEDUs, <-oq.incomingEDUs)
-					oq.pendingEDUs = append(oq.pendingEDUs, <-oq.incomingEDUs)
-				}
-			case invite := <-oq.incomingInvites:
-				// There's no strict ordering requirement for invites like
-				// there is for transactions, so we put the invite onto the
-				// front of the queue. This means that if an invite that is
-				// stuck failing already, that it won't block our new invite
-				// from being sent.
-				oq.pendingInvites = append(
-					[]*gomatrixserverlib.InviteV2Request{invite},
-					oq.pendingInvites...,
-				)
-				// If there are any more things waiting in the channel queue
-				// then read them. This is safe because we guarantee only
-				// having one goroutine per destination queue, so the channel
-				// isn't being consumed anywhere else.
-				for len(oq.incomingInvites) > 0 {
-					oq.pendingInvites = append(oq.pendingInvites, <-oq.incomingInvites)
-				}
-			case <-time.After(time.Second * 30):
-				// The worker is idle so stop the goroutine. It'll get
-				// restarted automatically the next time we have an event to
-				// send.
-				return
 			}
+		case invite := <-oq.incomingInvites:
+			// There's no strict ordering requirement for invites like
+			// there is for transactions, so we put the invite onto the
+			// front of the queue. This means that if an invite that is
+			// stuck failing already, that it won't block our new invite
+			// from being sent.
+			oq.pendingInvites = append(
+				[]*gomatrixserverlib.InviteV2Request{invite},
+				oq.pendingInvites...,
+			)
+			// If there are any more things waiting in the channel queue
+			// then read them. This is safe because we guarantee only
+			// having one goroutine per destination queue, so the channel
+			// isn't being consumed anywhere else.
+			for len(oq.incomingInvites) > 0 {
+				oq.pendingInvites = append(oq.pendingInvites, <-oq.incomingInvites)
+			}
+		case <-time.After(time.Second * 30):
+			// The worker is idle so stop the goroutine. It'll get
+			// restarted automatically the next time we have an event to
+			// send.
+			return
 		}
 
 		// If we are backing off this server then wait for the
@@ -317,8 +330,10 @@ func (oq *destinationQueue) nextTransaction(
 	// Ask the database for any pending PDUs from the next transaction.
 	// maxPDUsPerTransaction is an upper limit but we probably won't
 	// actually retrieve that many events.
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+	defer cancel()
 	txid, pdus, err := oq.db.GetNextTransactionPDUs(
-		context.TODO(),        // context
+		ctx,                   // context
 		oq.destination,        // server name
 		maxPDUsPerTransaction, // max events to retrieve
 	)
@@ -366,7 +381,7 @@ func (oq *destinationQueue) nextTransaction(
 	case nil:
 		// No error was returned so the transaction looks to have
 		// been successfully sent.
-		oq.pendingPDUs.Sub(int32(len(t.PDUs)))
+		oq.pendingPDUs.Sub(int64(len(t.PDUs)))
 		// Clean up the transaction in the database.
 		if err = oq.db.CleanTransactionPDUs(
 			context.TODO(),

federationsender/storage/interface.go

@@ -30,4 +30,5 @@ type Database interface {
 	AssociatePDUWithDestination(ctx context.Context, transactionID gomatrixserverlib.TransactionID, serverName gomatrixserverlib.ServerName, nids []int64) error
 	GetNextTransactionPDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, limit int) (gomatrixserverlib.TransactionID, []*gomatrixserverlib.HeaderedEvent, error)
 	CleanTransactionPDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, transactionID gomatrixserverlib.TransactionID) error
+	GetPendingPDUCount(ctx context.Context, serverName gomatrixserverlib.ServerName) (int64, error)
 }

federationsender/storage/postgres/queue_pdus_table.go

@@ -59,12 +59,17 @@ const selectQueueReferenceJSONCountSQL = "" +
 	"SELECT COUNT(*) FROM federationsender_queue_pdus" +
 	" WHERE json_nid = $1"
 
+const selectQueuePDUsCountSQL = "" +
+	"SELECT COUNT(*) FROM federationsender_queue_pdus" +
+	" WHERE server_name = $1"
+
 type queuePDUsStatements struct {
 	insertQueuePDUStmt                *sql.Stmt
 	deleteQueueTransactionPDUsStmt    *sql.Stmt
 	selectQueueNextTransactionIDStmt  *sql.Stmt
 	selectQueuePDUsByTransactionStmt  *sql.Stmt
 	selectQueueReferenceJSONCountStmt *sql.Stmt
+	selectQueuePDUsCountStmt          *sql.Stmt
 }
 
 func (s *queuePDUsStatements) prepare(db *sql.DB) (err error) {
@@ -87,6 +92,9 @@ func (s *queuePDUsStatements) prepare(db *sql.DB) (err error) {
 	if s.selectQueueReferenceJSONCountStmt, err = db.Prepare(selectQueueReferenceJSONCountSQL); err != nil {
 		return
 	}
+	if s.selectQueuePDUsCountStmt, err = db.Prepare(selectQueuePDUsCountSQL); err != nil {
+		return
+	}
 	return
 }
 
@@ -144,6 +152,21 @@ func (s *queuePDUsStatements) selectQueueReferenceJSONCount(
 	return count, err
 }
 
+func (s *queuePDUsStatements) selectQueuePDUCount(
+	ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
+) (int64, error) {
+	var count int64
+	stmt := sqlutil.TxStmt(txn, s.selectQueuePDUsCountStmt)
+	err := stmt.QueryRowContext(ctx, serverName).Scan(&count)
+	if err == sql.ErrNoRows {
+		// It's acceptable for there to be no rows referencing a given
+		// JSON NID but it's not an error condition. Just return as if
+		// there's a zero count.
+		return 0, nil
+	}
+	return count, err
+}
+
 func (s *queuePDUsStatements) selectQueuePDUs(
 	ctx context.Context, txn *sql.Tx,
 	serverName gomatrixserverlib.ServerName,

federationsender/storage/postgres/storage.go

@@ -255,3 +255,12 @@ func (d *Database) CleanTransactionPDUs(
 		return nil
 	})
 }
+
+// GetPendingPDUCount returns the number of PDUs waiting to be
+// sent for a given servername.
+func (d *Database) GetPendingPDUCount(
+	ctx context.Context,
+	serverName gomatrixserverlib.ServerName,
+) (int64, error) {
+	return d.selectQueuePDUCount(ctx, nil, serverName)
+}

federationsender/storage/sqlite3/queue_pdus_table.go

@@ -60,12 +60,17 @@ const selectQueueReferenceJSONCountSQL = "" +
 	"SELECT COUNT(*) FROM federationsender_queue_pdus" +
 	" WHERE json_nid = $1"
 
+const selectQueuePDUsCountSQL = "" +
+	"SELECT COUNT(*) FROM federationsender_queue_pdus" +
+	" WHERE server_name = $1"
+
 type queuePDUsStatements struct {
 	insertQueuePDUStmt                *sql.Stmt
 	deleteQueueTransactionPDUsStmt    *sql.Stmt
 	selectQueueNextTransactionIDStmt  *sql.Stmt
 	selectQueuePDUsByTransactionStmt  *sql.Stmt
 	selectQueueReferenceJSONCountStmt *sql.Stmt
+	selectQueuePDUsCountStmt          *sql.Stmt
 }
 
 func (s *queuePDUsStatements) prepare(db *sql.DB) (err error) {
@@ -88,6 +93,9 @@ func (s *queuePDUsStatements) prepare(db *sql.DB) (err error) {
 	if s.selectQueueReferenceJSONCountStmt, err = db.Prepare(selectQueueReferenceJSONCountSQL); err != nil {
 		return
 	}
+	if s.selectQueuePDUsCountStmt, err = db.Prepare(selectQueuePDUsCountSQL); err != nil {
+		return
+	}
 	return
 }
 
@@ -142,6 +150,21 @@ func (s *queuePDUsStatements) selectQueueReferenceJSONCount(
 	return count, err
 }
 
+func (s *queuePDUsStatements) selectQueuePDUCount(
+	ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
+) (int64, error) {
+	var count int64
+	stmt := sqlutil.TxStmt(txn, s.selectQueuePDUsCountStmt)
+	err := stmt.QueryRowContext(ctx, serverName).Scan(&count)
+	if err == sql.ErrNoRows {
+		// It's acceptable for there to be no rows referencing a given
+		// JSON NID but it's not an error condition. Just return as if
+		// there's a zero count.
+		return 0, nil
+	}
+	return count, err
+}
+
 func (s *queuePDUsStatements) selectQueuePDUs(
 	ctx context.Context, txn *sql.Tx,
 	serverName gomatrixserverlib.ServerName,

federationsender/storage/sqlite3/storage.go

@@ -261,3 +261,12 @@ func (d *Database) CleanTransactionPDUs(
 		return nil
 	})
 }
+
+// GetPendingPDUCount returns the number of PDUs waiting to be
+// sent for a given servername.
+func (d *Database) GetPendingPDUCount(
+	ctx context.Context,
+	serverName gomatrixserverlib.ServerName,
+) (int64, error) {
+	return d.selectQueuePDUCount(ctx, nil, serverName)
+}

go.mod

@@ -17,7 +17,8 @@ require (
 	github.com/libp2p/go-libp2p-kad-dht v0.5.0
 	github.com/libp2p/go-libp2p-pubsub v0.2.5
 	github.com/libp2p/go-libp2p-record v0.1.2
-	github.com/libp2p/go-yamux v1.3.7
+	github.com/libp2p/go-yamux v1.3.7 // indirect
+	github.com/lucas-clemente/quic-go v0.17.2
 	github.com/matrix-org/dugong v0.0.0-20171220115018-ea0a4690a0d5
 	github.com/matrix-org/go-http-js-libp2p v0.0.0-20200518170932-783164aeeda4
 	github.com/matrix-org/go-sqlite3-js v0.0.0-20200522092705-bc8506ccbcf3
@@ -37,9 +38,9 @@ require (
 	github.com/uber-go/atomic v1.3.0 // indirect
 	github.com/uber/jaeger-client-go v2.15.0+incompatible
 	github.com/uber/jaeger-lib v1.5.0
-	github.com/yggdrasil-network/yggdrasil-go v0.3.15-0.20200530233943-aec82d7a391b
+	github.com/yggdrasil-network/yggdrasil-go v0.3.15-0.20200702163833-11ecfa688d93
 	go.uber.org/atomic v1.4.0
-	golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d
+	golang.org/x/crypto v0.0.0-20200423211502-4bdfaf469ed5
 	gopkg.in/h2non/bimg.v1 v1.0.18
 	gopkg.in/yaml.v2 v2.2.8
 )

go.sum

@@ -1,4 +1,12 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.31.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.37.0/go.mod h1:TS1dMSSfndXH133OKGwekG838Om/cQT0BUHV3HcBgoo=
+dmitri.shuralyov.com/app/changes v0.0.0-20180602232624-0a106ad413e3/go.mod h1:Yl+fi1br7+Rr3LqpNJf1/uxUdtRUV+Tnj0o93V2B9MU=
+dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBrvjyP0v+ecvNYvCpyZgu5/xkfAUhi6wJj28eUfSU=
+dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1:a1inKt/atXimZ4Mv927x+r7UpyzRUf4emIoiiSC2TN4=
+dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
+git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
 github.com/AndreasBriese/bbloom v0.0.0-20180913140656-343706a395b7/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
 github.com/AndreasBriese/bbloom v0.0.0-20190306092124-e2d15f34fcf9/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
 github.com/Arceliar/phony v0.0.0-20191006174943-d0c68492aca0 h1:p3puK8Sl2xK+2FnnIvY/C0N1aqJo2kbEsdAzU+Tnv48=
@@ -17,11 +25,13 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuy
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4 h1:Hs82Z41s6SdL1CELW+XaDYmOH4hkBN4/N9og/AsOv7E=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBTaaSFSlLx/70C2HPIMNZpVV8+vt/A+FMnYP11g=
 github.com/btcsuite/btcd v0.0.0-20190213025234-306aecffea32/go.mod h1:DrZx5ec/dmnfpw9KyYoQyYo7d0KEvTkk/5M/vbZjAr8=
 github.com/btcsuite/btcd v0.0.0-20190523000118-16327141da8c/go.mod h1:3J08xEfcugPacsc34/LKRU2yO7YmuT8yt28J8k2+rrI=
 github.com/btcsuite/btcd v0.0.0-20190824003749-130ea5bddde3/go.mod h1:3J08xEfcugPacsc34/LKRU2yO7YmuT8yt28J8k2+rrI=
@@ -35,8 +45,11 @@ github.com/btcsuite/goleveldb v0.0.0-20160330041536-7834afc9e8cd/go.mod h1:F+uVa
 github.com/btcsuite/snappy-go v0.0.0-20151229074030-0bdef8d06723/go.mod h1:8woku9dyThutzjeg+3xrA5iCpBRH8XEEg3lh6TiUghc=
 github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792/go.mod h1:ghJtEyQwv5/p4Mg4C0fgbePVuGr935/5ddU9Z3TmDRY=
 github.com/btcsuite/winsvc v1.0.0/go.mod h1:jsenWakMcC0zFBFurPLEAyrnc/teJEM1O46fmI40EZs=
+github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cheekybits/genny v1.0.0 h1:uGGa4nei+j20rOSeDeP5Of12XVm7TGUd4dJA9RDitfE=
+github.com/cheekybits/genny v1.0.0/go.mod h1:+tQajlRqAUrPI7DOSpB0XAqZYtQakVtB7wXkRAgjxjQ=
 github.com/cheggaaa/pb/v3 v3.0.4/go.mod h1:7rgWxLrAUcFMkvJuv09+DYi7mMUYi8nO9iOWcvGJPfw=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd h1:qMd81Ts1T2OTKmB4acZcyKaMtRnY5Y44NuXGX2GFJ1w=
@@ -46,6 +59,7 @@ github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8Nz
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
 github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
 github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
@@ -71,14 +85,20 @@ github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1
 github.com/eapache/queue v1.1.0 h1:YOEu7KNc61ntiQlcEeUIoDTJ2o8mQznoNvUhiigpIqc=
 github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
 github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8vw=
 github.com/fortytw2/leaktest v1.3.0/go.mod h1:jDsjWgpAGjm2CA7WthBh/CdZYEPF31XHquHwclZch5g=
+github.com/francoispqt/gojay v1.2.13 h1:d2m3sFjloqoIUQU3TsHBgj6qg/BVGlTBeHDUmyJnXKk=
+github.com/francoispqt/gojay v1.2.13/go.mod h1:ehT5mTG4ua4581f1++1WLG0vPdaA9HaiDsoyrBGkyDY=
 github.com/frankban/quicktest v1.0.0/go.mod h1:R98jIehRai+d1/3Hv2//jOVCTJhW1VBavT6B6CuGq2k=
 github.com/frankban/quicktest v1.7.2 h1:2QxQoC1TS09S7fhCPsrvqYdvP1H5M1P1ih5ABm3BTYk=
 github.com/frankban/quicktest v1.7.2/go.mod h1:jaStnuzAqU1AJdCO0l53JDCJrVDKcS03DbaAcR7Ks/o=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/gliderlabs/ssh v0.1.1/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
 github.com/go-check/check v0.0.0-20180628173108-788fd7840127/go.mod h1:9ES+weclKsC9YodN5RgxqK/VD9HM9JsCSh7rNhMZE98=
+github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
@@ -92,18 +112,29 @@ github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXP
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 h1:ZgQEtGgCBiWRM39fZuwSd1LwSqqSW0hOdXCYYDX0R3I=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
+github.com/golang/lint v0.0.0-20180702182130-06c8688daad7/go.mod h1:tluoj9z5200jBnyusfRPU2LqT6J+DAorxEvtC7LHB+E=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.4.0 h1:Rd1kQnQu0Hq3qvJppYSG0HtP+f5LPPUiDswTLiEegLg=
+github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.0/go.mod h1:Qd/q+1AKNOZr9uGQzbzCmRO6sUih6GTPZv6a1/R87v0=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
+github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
+github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
+github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
+github.com/golang/protobuf v1.4.0 h1:oOuy+ugB+P/kBdUnG5QaMXSIyJ1q38wWSojYCb3z5VQ=
+github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/gologme/log v0.0.0-20181207131047-4e5d8ccb38e8/go.mod h1:gq31gQ8wEHkR+WekdWsqDuf8pXTUZA9BnnzTuPz1Y9U=
 github.com/gologme/log v1.2.0 h1:Ya5Ip/KD6FX7uH0S31QO87nCCSucKtF44TLbTtO7V4c=
 github.com/gologme/log v1.2.0/go.mod h1:gq31gQ8wEHkR+WekdWsqDuf8pXTUZA9BnnzTuPz1Y9U=
+github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg=
@@ -111,13 +142,22 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-github v17.0.0+incompatible/go.mod h1:zLgOLi98H3fifZn+44m+umXrS52loVEgC2AApnigrVQ=
+github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
+github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
 github.com/google/uuid v1.1.1 h1:Gkbcsh/GbpXz7lPftLA3P6TYMwjCLYm83jiFQZF/3gY=
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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@@ -546,6 +622,7 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV
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@@ -562,6 +639,8 @@ github.com/uber/jaeger-client-go v2.15.0+incompatible/go.mod h1:WVhlPFC8FDjOFMMW
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@@ -581,8 +660,9 @@ github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c/go.mod h1:lB8K/P019DLNhe
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@@ -594,14 +674,18 @@ go.uber.org/multierr v1.1.0 h1:HoEmRHQPVSqub6w2z2d2EOVs2fjyFRGyofhKuyDq0QI=
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@@ -612,7 +696,10 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
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@@ -620,10 +707,15 @@ golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73r
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@@ -635,6 +727,10 @@ golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLL
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@@ -673,19 +771,26 @@ golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -693,14 +798,32 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
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@@ -716,6 +839,7 @@ gopkg.in/h2non/bimg.v1 v1.0.18 h1:qn6/RpBHt+7WQqoBcK+aF2puc6nC78eZj5LexxoalT4=
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@@ -740,5 +864,12 @@ gopkg.in/yaml.v2 v2.2.5 h1:ymVxjfMaHvXD8RqPRmzHHsB3VvucivSkIAvJFDI5O3c=
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