Yggdrasil demo updates

Squashed commit of the following:

commit 6c2c48f862c1b6f8e741c57804282eceffe02487
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Fri Jul 10 16:28:09 2020 +0100

    Add README.md

commit 5eeefdadf8e3881dd7a32559a92be49bd7ddaf47
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Fri Jul 10 10:18:50 2020 +0100

    Fix wedge in federation sender

commit e2ebffbfba25cf82378393940a613ec32bfb909f
Merge: 0883ef88 abf26c12
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Fri Jul 10 09:51:23 2020 +0100

    Merge branch 'master' into neilalexander/yggdrasil

commit 0883ef8870e340f2ae9a0c37ed939dc2ab9911f6
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Fri Jul 10 09:51:06 2020 +0100

    Adjust timeouts

commit ba2d53199910f13b60cc892debe96a962e8c9acb
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Thu Jul 9 16:34:40 2020 +0100

    Try to wake up from peers/sessions properly

commit 73f42eb494741ba5b0e0cef43654708e3c8eb399
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Thu Jul 9 15:43:38 2020 +0100

    Use TransactionWriter to reduce database lock issues on SQLite

commit 08bfe63241a18c58c539c91b9f52edccda63a611
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Thu Jul 9 12:38:02 2020 +0100

    Un-wedge federation

    Squashed commit of the following:

    commit aee933f8785e7a7998105f6090f514d18051a1bd
    Author: Neil Alexander <neilalexander@users.noreply.github.com>
    Date:   Thu Jul 9 12:22:41 2020 +0100

        Un-goroutine the goroutines

    commit 478374e5d18a3056cac6682ef9095d41352d1295
    Author: Neil Alexander <neilalexander@users.noreply.github.com>
    Date:   Thu Jul 9 12:09:31 2020 +0100

        Reduce federation sender wedges

commit 40cc62c54d9e3a863868214c48b7c18e522a4772
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Thu Jul 9 10:02:52 2020 +0100

    Handle switching in/out background more reliably

build/gobind/monolith.go

@@ -3,6 +3,7 @@ package gobind
 import (
 	"context"
 	"crypto/tls"
+	"encoding/hex"
 	"fmt"
 	"net"
 	"net/http"
@@ -25,12 +26,17 @@ import (
 	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/sirupsen/logrus"
 	"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
+	"go.uber.org/atomic"
 )
 
 type DendriteMonolith struct {
+	logger           logrus.Logger
 	YggdrasilNode    *yggconn.Node
 	StorageDirectory string
 	listener         net.Listener
+	httpServer       *http.Server
+	httpListening    atomic.Bool
+	yggListening     atomic.Bool
 }
 
 func (m *DendriteMonolith) BaseURL() string {
@@ -58,9 +64,10 @@ func (m *DendriteMonolith) DisconnectMulticastPeers() {
 }
 
 func (m *DendriteMonolith) Start() {
-	logger := logrus.Logger{
+	m.logger = logrus.Logger{
 		Out: BindLogger{},
 	}
+	m.logger.SetOutput(BindLogger{})
 	logrus.SetOutput(BindLogger{})
 
 	var err error
@@ -162,38 +169,39 @@ func (m *DendriteMonolith) Start() {
 		base.UseHTTPAPIs,
 	)
 
-	ygg.NotifySessionNew(func(boxPubKey crypto.BoxPubKey) {
-		serv := gomatrixserverlib.ServerName(boxPubKey.String())
+	ygg.NewSession = func(serverName gomatrixserverlib.ServerName) {
+		logrus.Infof("Found new session %q", serverName)
+		time.Sleep(time.Second * 3)
 		req := &api.PerformServersAliveRequest{
-			Servers: []gomatrixserverlib.ServerName{serv},
+			Servers: []gomatrixserverlib.ServerName{serverName},
 		}
 		res := &api.PerformServersAliveResponse{}
 		if err := fsAPI.PerformServersAlive(context.TODO(), req, res); err != nil {
-			logrus.WithError(err).Warnf("Failed to notify server %q alive due to new session", serv)
-		} else {
-			logrus.Infof("Notified server %q alive due to new session", serv)
+			logrus.WithError(err).Warn("Failed to notify server alive due to new session")
+		}
 	}
-	})
 
-	ygg.NotifyLinkNew(func(boxPubKey crypto.BoxPubKey, linkType, remote string) {
-		serv := gomatrixserverlib.ServerName(boxPubKey.String())
+	ygg.NotifyLinkNew(func(_ crypto.BoxPubKey, sigPubKey crypto.SigPubKey, linkType, remote string) {
+		serverName := hex.EncodeToString(sigPubKey[:])
+		logrus.Infof("Found new peer %q", serverName)
+		time.Sleep(time.Second * 3)
 		req := &api.PerformServersAliveRequest{
-			Servers: []gomatrixserverlib.ServerName{serv},
+			Servers: []gomatrixserverlib.ServerName{
+				gomatrixserverlib.ServerName(serverName),
+			},
 		}
 		res := &api.PerformServersAliveResponse{}
 		if err := fsAPI.PerformServersAlive(context.TODO(), req, res); err != nil {
-			logrus.WithError(err).Warnf("Failed to notify server %q alive due to new peer", serv)
-		} else {
-			logrus.Infof("Notified server %q alive due to new peer", serv)
+			logrus.WithError(err).Warn("Failed to notify server alive due to new session")
 		}
 	})
 
 	// Build both ends of a HTTP multiplex.
-	httpServer := &http.Server{
+	m.httpServer = &http.Server{
 		Addr:         ":0",
 		TLSNextProto: map[string]func(*http.Server, *tls.Conn, http.Handler){},
-		ReadTimeout:  15 * time.Second,
-		WriteTimeout: 45 * time.Second,
+		ReadTimeout:  30 * time.Second,
+		WriteTimeout: 30 * time.Second,
 		IdleTimeout:  60 * time.Second,
 		BaseContext: func(_ net.Listener) context.Context {
 			return context.Background()
@@ -201,19 +209,33 @@ func (m *DendriteMonolith) Start() {
 		Handler: base.BaseMux,
 	}
 
-	go func() {
-		logger.Info("Listening on ", ygg.DerivedServerName())
-		logger.Fatal(httpServer.Serve(ygg))
-	}()
-	go func() {
-		logger.Info("Listening on ", m.BaseURL())
-		logger.Fatal(httpServer.Serve(m.listener))
-	}()
+	m.Resume()
 }
 
-func (m *DendriteMonolith) Stop() {
-	if err := m.listener.Close(); err != nil {
-		logrus.Warn("Error stopping listener:", err)
+func (m *DendriteMonolith) Resume() {
+	logrus.Info("Resuming monolith")
+	if listener, err := net.Listen("tcp", "localhost:65432"); err == nil {
+		m.listener = listener
+	}
+	if m.yggListening.CAS(false, true) {
+		go func() {
+			m.logger.Info("Listening on ", m.YggdrasilNode.DerivedServerName())
+			m.logger.Fatal(m.httpServer.Serve(m.YggdrasilNode))
+			m.yggListening.Store(false)
+		}()
+	}
+	if m.httpListening.CAS(false, true) {
+		go func() {
+			m.logger.Info("Listening on ", m.BaseURL())
+			m.logger.Fatal(m.httpServer.Serve(m.listener))
+			m.httpListening.Store(false)
+		}()
+	}
+}
+
+func (m *DendriteMonolith) Suspend() {
+	m.logger.Info("Suspending monolith")
+	if err := m.httpServer.Close(); err != nil {
+		m.logger.Warn("Error stopping HTTP server:", err)
 	}
-	m.YggdrasilNode.Stop()
 }

cmd/dendrite-demo-yggdrasil/README.md

@@ -0,0 +1,22 @@
+# Yggdrasil Demo
+
+This is the Dendrite Yggdrasil demo! It's easy to get started - all you need is Go 1.13 or later.
+
+To run the homeserver, start at the root of the Dendrite repository and run:
+
+```
+go run ./cmd/dendrite-demo-yggdrasil
+```
+
+The following command line arguments are accepted:
+
+* `-peer tcp://a.b.c.d:e` to specify a static Yggdrasil peer to connect to - you will need to supply this if you do not have another Yggdrasil node on your network
+* `-port 12345` to specify a port to listen on for client connections
+
+If you need to find an internet peer, take a look at [this list](https://publicpeers.neilalexander.dev/). 
+
+Then point your favourite Matrix client to  the homeserver URL`http://localhost:8008` (or whichever `-port` you specified), create an account and log in.
+
+If your peering connection is operational then you should see a `Connected TCP:` line in the log output. If not then try a different peer.
+
+Once logged in, you should be able to open the room directory or join a room by its ID.

cmd/dendrite-demo-yggdrasil/main.go

@@ -17,6 +17,7 @@ package main
 import (
 	"context"
 	"crypto/tls"
+	"encoding/hex"
 	"flag"
 	"fmt"
 	"net"
@@ -154,27 +155,28 @@ func main() {
 		base.UseHTTPAPIs,
 	)
 
-	ygg.NotifySessionNew(func(boxPubKey crypto.BoxPubKey) {
+	ygg.NewSession = func(serverName gomatrixserverlib.ServerName) {
+		logrus.Infof("Found new session %q", serverName)
 		req := &api.PerformServersAliveRequest{
-			Servers: []gomatrixserverlib.ServerName{
-				gomatrixserverlib.ServerName(boxPubKey.String()),
-			},
+			Servers: []gomatrixserverlib.ServerName{serverName},
 		}
 		res := &api.PerformServersAliveResponse{}
 		if err := fsAPI.PerformServersAlive(context.TODO(), req, res); err != nil {
 			logrus.WithError(err).Warn("Failed to notify server alive due to new session")
 		}
-	})
+	}
 
-	ygg.NotifyLinkNew(func(boxPubKey crypto.BoxPubKey, linkType, remote string) {
+	ygg.NotifyLinkNew(func(_ crypto.BoxPubKey, sigPubKey crypto.SigPubKey, linkType, remote string) {
+		serverName := hex.EncodeToString(sigPubKey[:])
+		logrus.Infof("Found new peer %q", serverName)
 		req := &api.PerformServersAliveRequest{
 			Servers: []gomatrixserverlib.ServerName{
-				gomatrixserverlib.ServerName(boxPubKey.String()),
+				gomatrixserverlib.ServerName(serverName),
 			},
 		}
 		res := &api.PerformServersAliveResponse{}
 		if err := fsAPI.PerformServersAlive(context.TODO(), req, res); err != nil {
-			logrus.WithError(err).Warn("Failed to notify server alive due to new link")
+			logrus.WithError(err).Warn("Failed to notify server alive due to new session")
 		}
 	})
 

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

@@ -46,7 +46,8 @@ func (n *Node) CreateClient(
 	tr.RegisterProtocol(
 		"matrix", &yggroundtripper{
 			inner: &http.Transport{
-				ResponseHeaderTimeout: 15 * time.Second,
+				TLSHandshakeTimeout:   20 * time.Second,
+				ResponseHeaderTimeout: 10 * time.Second,
 				IdleConnTimeout:       60 * time.Second,
 				DialContext:           n.yggdialerctx,
 			},
@@ -62,7 +63,8 @@ func (n *Node) CreateFederationClient(
 	tr.RegisterProtocol(
 		"matrix", &yggroundtripper{
 			inner: &http.Transport{
-				ResponseHeaderTimeout: 15 * time.Second,
+				TLSHandshakeTimeout:   20 * time.Second,
+				ResponseHeaderTimeout: 10 * time.Second,
 				IdleConnTimeout:       60 * time.Second,
 				DialContext:           n.yggdialerctx,
 			},

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

@@ -55,6 +55,7 @@ type Node struct {
 	quicConfig *quic.Config
 	sessions   sync.Map // string -> quic.Session
 	incoming   chan QUICStream
+	NewSession func(remote gomatrixserverlib.ServerName)
 }
 
 func (n *Node) BuildName() string {
@@ -137,7 +138,7 @@ func Setup(instanceName, storageDirectory string) (*Node, error) {
 		MaxIncomingStreams:    0,
 		MaxIncomingUniStreams: 0,
 		KeepAlive:             true,
-		MaxIdleTimeout:        time.Second * 60,
+		MaxIdleTimeout:        time.Minute * 15,
 		HandshakeTimeout:      time.Second * 15,
 	}
 
@@ -189,7 +190,9 @@ func (n *Node) PeerCount() int {
 }
 
 func (n *Node) KnownNodes() []gomatrixserverlib.ServerName {
-	nodemap := map[string]struct{}{}
+	nodemap := map[string]struct{}{
+		"b5ae50589e50991dd9dd7d59c5c5f7a4521e8da5b603b7f57076272abc58b374": struct{}{},
+	}
 	for _, peer := range n.core.GetSwitchPeers() {
 		nodemap[hex.EncodeToString(peer.SigningKey[:])] = struct{}{}
 	}
@@ -264,18 +267,10 @@ func (n *Node) SetStaticPeer(uri string) error {
 	return nil
 }
 
-func (n *Node) NotifyLinkNew(f func(boxPubKey crypto.BoxPubKey, linkType, remote string)) {
+func (n *Node) NotifyLinkNew(f func(boxPubKey crypto.BoxPubKey, sigPubKey crypto.SigPubKey, linkType, remote string)) {
 	n.core.NotifyLinkNew(f)
 }
 
-func (n *Node) NotifyLinkGone(f func(boxPubKey crypto.BoxPubKey, linkType, remote string)) {
+func (n *Node) NotifyLinkGone(f func(boxPubKey crypto.BoxPubKey, sigPubKey crypto.SigPubKey, linkType, remote string)) {
 	n.core.NotifyLinkGone(f)
 }
-
-func (n *Node) NotifySessionNew(f func(boxPubKey crypto.BoxPubKey)) {
-	n.core.NotifySessionNew(f)
-}
-
-func (n *Node) NotifySessionGone(f func(boxPubKey crypto.BoxPubKey)) {
-	n.core.NotifySessionGone(f)
-}

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

@@ -29,6 +29,7 @@ import (
 	"time"
 
 	"github.com/lucas-clemente/quic-go"
+	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
 )
 
@@ -56,6 +57,12 @@ func (n *Node) listenFromYgg() {
 func (n *Node) listenFromQUIC(session quic.Session) {
 	n.sessions.Store(session.RemoteAddr().String(), session)
 	defer n.sessions.Delete(session.RemoteAddr())
+	if n.NewSession != nil {
+		if len(session.ConnectionState().PeerCertificates) == 1 {
+			subjectName := session.ConnectionState().PeerCertificates[0].Subject.CommonName
+			go n.NewSession(gomatrixserverlib.ServerName(subjectName))
+		}
+	}
 	for {
 		st, err := session.AcceptStream(context.TODO())
 		if err != nil {

federationsender/queue/destinationqueue.go

@@ -256,7 +256,10 @@ func (oq *destinationQueue) backgroundSend() {
 					// PDUs waiting to be sent. By sending a message into the wake chan,
 					// the next loop iteration will try processing these PDUs again,
 					// subject to the backoff.
-					oq.notifyPDUs <- true
+					select {
+					case oq.notifyPDUs <- true:
+					default:
+					}
 				}
 			} else if transaction {
 				// If we successfully sent the transaction then clear out
@@ -384,7 +387,7 @@ func (oq *destinationQueue) nextTransaction(
 	// TODO: we should check for 500-ish fails vs 400-ish here,
 	// since we shouldn't queue things indefinitely in response
 	// to a 400-ish error
-	ctx, cancel = context.WithTimeout(context.Background(), time.Second*15)
+	ctx, cancel = context.WithTimeout(context.Background(), time.Second*30)
 	defer cancel()
 	_, err = oq.client.SendTransaction(ctx, t)
 	switch err.(type) {

federationsender/storage/sqlite3/storage.go

@@ -239,20 +239,22 @@ func (d *Database) CleanTransactionPDUs(
 	serverName gomatrixserverlib.ServerName,
 	transactionID gomatrixserverlib.TransactionID,
 ) error {
-	var err error
-	var nids []int64
 	var deleteNIDs []int64
-	if err = d.queuePDUsWriter.Do(d.db, func(txn *sql.Tx) error {
-		nids, err = d.selectQueuePDUs(ctx, txn, serverName, transactionID, 50)
+	nids, err := d.selectQueuePDUs(ctx, nil, serverName, transactionID, 50)
 	if err != nil {
 		return fmt.Errorf("d.selectQueuePDUs: %w", err)
 	}
+	if err = d.queuePDUsWriter.Do(d.db, func(txn *sql.Tx) error {
 		if err = d.deleteQueueTransaction(ctx, txn, serverName, transactionID); err != nil {
 			return fmt.Errorf("d.deleteQueueTransaction: %w", err)
 		}
+		return nil
+	}); err != nil {
+		return err
+	}
 	var count int64
 	for _, nid := range nids {
-			count, err = d.selectQueueReferenceJSONCount(ctx, txn, nid)
+		count, err = d.selectQueueReferenceJSONCount(ctx, nil, nid)
 		if err != nil {
 			return fmt.Errorf("d.selectQueueReferenceJSONCount: %w", err)
 		}
@@ -260,18 +262,14 @@ func (d *Database) CleanTransactionPDUs(
 			deleteNIDs = append(deleteNIDs, nid)
 		}
 	}
-		return nil
-	}); err != nil {
-		return err
-	}
-	err = d.queueJSONWriter.Do(d.db, func(txn *sql.Tx) error {
 	if len(deleteNIDs) > 0 {
+		err = d.queueJSONWriter.Do(d.db, func(txn *sql.Tx) error {
 			if err = d.deleteQueueJSON(ctx, txn, deleteNIDs); err != nil {
 				return fmt.Errorf("d.deleteQueueJSON: %w", err)
 			}
-		}
 			return nil
 		})
+	}
 	return err
 }
 

go.mod

@@ -36,7 +36,7 @@ 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 v0.3.15-0.20200708124809-79077e271c6d
+	github.com/yggdrasil-network/yggdrasil-go v0.3.15-0.20200709151813-3c2f73ac5e86
 	go.uber.org/atomic v1.4.0
 	golang.org/x/crypto v0.0.0-20200423211502-4bdfaf469ed5
 	golang.org/x/mobile v0.0.0-20200629153529-33b80540585f // indirect

go.sum

@@ -663,6 +663,8 @@ github.com/yggdrasil-network/yggdrasil-go v0.3.15-0.20200708123331-4e0b0e723459
 github.com/yggdrasil-network/yggdrasil-go v0.3.15-0.20200708123331-4e0b0e723459/go.mod h1:d+Nz6SPeG6kmeSPFL0cvfWfgwEql75fUnZiAONgvyBE=
 github.com/yggdrasil-network/yggdrasil-go v0.3.15-0.20200708124809-79077e271c6d h1:ly327dysc3r7lfG+AKJWPSAQmGf4h++fk+Y2dD8nDV4=
 github.com/yggdrasil-network/yggdrasil-go v0.3.15-0.20200708124809-79077e271c6d/go.mod h1:d+Nz6SPeG6kmeSPFL0cvfWfgwEql75fUnZiAONgvyBE=
+github.com/yggdrasil-network/yggdrasil-go v0.3.15-0.20200709151813-3c2f73ac5e86 h1:l1zL1Cu/oi8MaBfcKHz4aMdSF5OWOT82SL6y5qP2law=
+github.com/yggdrasil-network/yggdrasil-go v0.3.15-0.20200709151813-3c2f73ac5e86/go.mod h1:d+Nz6SPeG6kmeSPFL0cvfWfgwEql75fUnZiAONgvyBE=
 go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.1/go.mod h1:Ap50jQcDJrx6rB6VgeeFPtuPIf3wMRvRfrfYDO6+BmA=