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

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// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// 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 yggconn
import (
"context"
"crypto/ed25519"
"crypto/tls"
"encoding/hex"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net"
"os"
"strings"
"sync"
"time"
"github.com/lucas-clemente/quic-go"
"github.com/matrix-org/dendrite/cmd/dendrite-demo-yggdrasil/convert"
"github.com/matrix-org/gomatrixserverlib"
yggdrasiladmin "github.com/yggdrasil-network/yggdrasil-go/src/admin"
yggdrasilconfig "github.com/yggdrasil-network/yggdrasil-go/src/config"
"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
yggdrasilmulticast "github.com/yggdrasil-network/yggdrasil-go/src/multicast"
"github.com/yggdrasil-network/yggdrasil-go/src/yggdrasil"
gologme "github.com/gologme/log"
)
type Node struct {
core *yggdrasil.Core
config *yggdrasilconfig.NodeConfig
state *yggdrasilconfig.NodeState
admin *yggdrasiladmin.AdminSocket
multicast *yggdrasilmulticast.Multicast
log *gologme.Logger
packetConn *yggdrasil.PacketConn
listener quic.Listener
tlsConfig *tls.Config
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) {
tokens := strings.Split(address, ":")
raw, err := hex.DecodeString(tokens[0])
if err != nil {
return nil, fmt.Errorf("hex.DecodeString: %w", err)
}
converted := convert.Ed25519PublicKeyToCurve25519(ed25519.PublicKey(raw))
convhex := hex.EncodeToString(converted)
return n.Dial("curve25519", convhex)
}
func (n *Node) DialerContext(ctx context.Context, network, address string) (net.Conn, error) {
return n.Dialer(network, address)
}
// nolint:gocyclo
func Setup(instanceName, storageDirectory string) (*Node, error) {
n := &Node{
core: &yggdrasil.Core{},
config: yggdrasilconfig.GenerateConfig(),
admin: &yggdrasiladmin.AdminSocket{},
multicast: &yggdrasilmulticast.Multicast{},
log: gologme.New(os.Stdout, "YGG ", log.Flags()),
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) {
yggconf, e := ioutil.ReadFile(yggfile)
if e != nil {
panic(err)
}
if err := json.Unmarshal([]byte(yggconf), &n.config); err != nil {
panic(err)
}
}
n.config.Peers = []string{}
n.config.AdminListen = "none"
n.config.MulticastInterfaces = []string{}
n.config.EncryptionPrivateKey = hex.EncodeToString(n.EncryptionPrivateKey())
n.config.EncryptionPublicKey = hex.EncodeToString(n.EncryptionPublicKey())
j, err := json.MarshalIndent(n.config, "", " ")
if err != nil {
panic(err)
}
if e := ioutil.WriteFile(yggfile, j, 0600); e != nil {
n.log.Printf("Couldn't write private key to file '%s': %s\n", yggfile, e)
}
n.log.EnableLevel("error")
n.log.EnableLevel("warn")
n.log.EnableLevel("info")
n.state, err = n.core.Start(n.config, n.log)
if 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.packetConn = n.core.PacketConn()
n.tlsConfig = n.generateTLSConfig()
n.quicConfig = &quic.Config{
MaxIncomingStreams: 0,
MaxIncomingUniStreams: 0,
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KeepAlive: true,
MaxIdleTimeout: time.Second * 60,
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HandshakeTimeout: time.Second * 15,
}
n.log.Println("Public curve25519:", n.core.EncryptionPublicKey())
n.log.Println("Public ed25519:", n.core.SigningPublicKey())
go n.listenFromYgg()
return n, nil
}
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func (n *Node) Stop() {
if err := n.multicast.Stop(); err != nil {
n.log.Println("Error stopping multicast:", err)
}
n.core.Stop()
}
func (n *Node) DerivedServerName() string {
return hex.EncodeToString(n.SigningPublicKey())
}
func (n *Node) DerivedSessionName() string {
return hex.EncodeToString(n.EncryptionPublicKey())
}
func (n *Node) EncryptionPublicKey() []byte {
edkey := n.SigningPublicKey()
return convert.Ed25519PublicKeyToCurve25519(edkey)
}
func (n *Node) EncryptionPrivateKey() []byte {
edkey := n.SigningPrivateKey()
return convert.Ed25519PrivateKeyToCurve25519(edkey)
}
func (n *Node) SigningPublicKey() ed25519.PublicKey {
pubBytes, _ := hex.DecodeString(n.config.SigningPublicKey)
return ed25519.PublicKey(pubBytes)
}
func (n *Node) SigningPrivateKey() ed25519.PrivateKey {
privBytes, _ := hex.DecodeString(n.config.SigningPrivateKey)
return ed25519.PrivateKey(privBytes)
}
func (n *Node) PeerCount() int {
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return len(n.core.GetPeers()) - 1
}
func (n *Node) KnownNodes() []gomatrixserverlib.ServerName {
nodemap := map[string]struct{}{}
for _, peer := range n.core.GetSwitchPeers() {
nodemap[hex.EncodeToString(peer.SigningKey[:])] = struct{}{}
}
n.sessions.Range(func(_, v interface{}) bool {
session, ok := v.(quic.Session)
if !ok {
return true
}
if len(session.ConnectionState().PeerCertificates) != 1 {
return true
}
subjectName := session.ConnectionState().PeerCertificates[0].Subject.CommonName
nodemap[subjectName] = struct{}{}
return true
})
var nodes []gomatrixserverlib.ServerName
for node := range nodemap {
nodes = append(nodes, gomatrixserverlib.ServerName(node))
}
return nodes
}
func (n *Node) SetMulticastEnabled(enabled bool) {
if enabled {
n.config.MulticastInterfaces = []string{".*"}
} else {
n.config.MulticastInterfaces = []string{}
}
n.multicast.UpdateConfig(n.config)
if !enabled {
n.DisconnectMulticastPeers()
}
}
func (n *Node) DisconnectMulticastPeers() {
for _, sp := range n.core.GetSwitchPeers() {
if !strings.HasPrefix(sp.Endpoint, "fe80") {
continue
}
if err := n.core.DisconnectPeer(sp.Port); err != nil {
n.log.Printf("Failed to disconnect port %d: %s", sp.Port, err)
}
}
}
func (n *Node) DisconnectNonMulticastPeers() {
for _, sp := range n.core.GetSwitchPeers() {
if strings.HasPrefix(sp.Endpoint, "fe80") {
continue
}
if err := n.core.DisconnectPeer(sp.Port); err != nil {
n.log.Printf("Failed to disconnect port %d: %s", sp.Port, err)
}
}
}
func (n *Node) SetStaticPeer(uri string) error {
n.config.Peers = []string{}
n.core.UpdateConfig(n.config)
n.DisconnectNonMulticastPeers()
if uri != "" {
n.log.Infoln("Adding static peer", uri)
if err := n.core.AddPeer(uri, ""); err != nil {
n.log.Warnln("Adding static peer failed:", err)
return err
}
if err := n.core.CallPeer(uri, ""); err != nil {
n.log.Warnln("Calling static peer failed:", err)
return err
}
}
return nil
}
func (n *Node) NotifyLinkNew(f func(boxPubKey crypto.BoxPubKey, linkType, remote string)) {
n.core.NotifyLinkNew(f)
}
func (n *Node) NotifyLinkGone(f func(boxPubKey crypto.BoxPubKey, 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)
}