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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"
"encoding/hex"
"net"
"regexp"
"strings"
"github.com/matrix-org/gomatrixserverlib/spec"
"github.com/sirupsen/logrus"
"github.com/yggdrasil-network/yggquic"
"github.com/yggdrasil-network/yggdrasil-go/src/config"
"github.com/yggdrasil-network/yggdrasil-go/src/core"
yggdrasilcore "github.com/yggdrasil-network/yggdrasil-go/src/core"
"github.com/yggdrasil-network/yggdrasil-go/src/multicast"
yggdrasilmulticast "github.com/yggdrasil-network/yggdrasil-go/src/multicast"
gologme "github.com/gologme/log"
)
type Node struct {
core *yggdrasilcore.Core
multicast *yggdrasilmulticast.Multicast
log *gologme.Logger
*yggquic.YggdrasilTransport
}
func (n *Node) DialerContext(ctx context.Context, _, address string) (net.Conn, error) {
tokens := strings.Split(address, ":")
return n.DialContext(ctx, "yggdrasil", tokens[0])
}
func Setup(sk ed25519.PrivateKey, instanceName, storageDirectory, peerURI, listenURI string) (*Node, error) {
n := &Node{
log: gologme.New(logrus.StandardLogger().Writer(), "", 0),
}
cfg := config.GenerateConfig()
cfg.PrivateKey = config.KeyBytes(sk)
if err := cfg.GenerateSelfSignedCertificate(); err != nil {
panic(err)
}
n.log.EnableLevel("error")
n.log.EnableLevel("warn")
n.log.EnableLevel("info")
{
var err error
options := []yggdrasilcore.SetupOption{}
if listenURI != "" {
options = append(options, yggdrasilcore.ListenAddress(listenURI))
}
if peerURI != "" {
for _, uri := range strings.Split(peerURI, ",") {
options = append(options, yggdrasilcore.Peer{
URI: uri,
})
}
}
if n.core, err = core.New(cfg.Certificate, n.log, options...); err != nil {
panic(err)
}
n.core.SetLogger(n.log)
if n.YggdrasilTransport, err = yggquic.New(n.core, *cfg.Certificate, nil); err != nil {
panic(err)
}
}
// Setup the multicast module.
{
var err error
options := []multicast.SetupOption{
multicast.MulticastInterface{
Regex: regexp.MustCompile(".*"),
Beacon: true,
Listen: true,
Port: 0,
Priority: 0,
},
}
if n.multicast, err = multicast.New(n.core, n.log, options...); err != nil {
panic(err)
}
}
n.log.Printf("Public key: %x", n.core.PublicKey())
return n, nil
}
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.PublicKey())
}
func (n *Node) PrivateKey() ed25519.PrivateKey {
return n.core.PrivateKey()
}
func (n *Node) PublicKey() ed25519.PublicKey {
return n.core.PublicKey()
}
func (n *Node) PeerCount() int {
return len(n.core.GetPeers())
}
func (n *Node) KnownNodes() []spec.ServerName {
nodemap := map[string]struct{}{}
for _, peer := range n.core.GetPeers() {
nodemap[hex.EncodeToString(peer.Key)] = struct{}{}
}
var nodes []spec.ServerName
for node := range nodemap {
nodes = append(nodes, spec.ServerName(node))
}
return nodes
}
func (n *Node) SetMulticastEnabled(enabled bool) {
// TODO: There's no dynamic reconfiguration in Yggdrasil v0.4
// so we need a solution for this.
}
func (n *Node) DisconnectMulticastPeers() {
// TODO: There's no dynamic reconfiguration in Yggdrasil v0.4
// so we need a solution for this.
}
func (n *Node) DisconnectNonMulticastPeers() {
// TODO: There's no dynamic reconfiguration in Yggdrasil v0.4
// so we need a solution for this.
}
func (n *Node) SetStaticPeer(uri string) error {
// TODO: There's no dynamic reconfiguration in Yggdrasil v0.4
// so we need a solution for this.
return nil
}
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