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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 main
import (
"context"
"fmt"
"errors"
pstore "github.com/libp2p/go-libp2p-core/peerstore"
record "github.com/libp2p/go-libp2p-record"
"github.com/matrix-org/dendrite/internal/basecomponent"
"github.com/libp2p/go-libp2p"
circuit "github.com/libp2p/go-libp2p-circuit"
crypto "github.com/libp2p/go-libp2p-core/crypto"
routing "github.com/libp2p/go-libp2p-core/routing"
host "github.com/libp2p/go-libp2p-core/host"
dht "github.com/libp2p/go-libp2p-kad-dht"
pubsub "github.com/libp2p/go-libp2p-pubsub"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/dendrite/internal/config"
)
// P2PDendrite is a Peer-to-Peer variant of BaseDendrite.
type P2PDendrite struct {
Base basecomponent.BaseDendrite
// Store our libp2p object so that we can make outgoing connections from it
// later
LibP2P host.Host
LibP2PContext context.Context
LibP2PCancel context.CancelFunc
LibP2PDHT *dht.IpfsDHT
LibP2PPubsub *pubsub.PubSub
}
// NewP2PDendrite creates a new instance to be used by a component.
// The componentName is used for logging purposes, and should be a friendly name
// of the component running, e.g. SyncAPI.
func NewP2PDendrite(cfg *config.Dendrite, componentName string) *P2PDendrite {
baseDendrite := basecomponent.NewBaseDendrite(cfg, componentName, false)
ctx, cancel := context.WithCancel(context.Background())
privKey, err := crypto.UnmarshalEd25519PrivateKey(cfg.Matrix.PrivateKey[:])
if err != nil {
panic(err)
}
//defaultIP6ListenAddr, _ := multiaddr.NewMultiaddr("/ip6/::/tcp/0")
var libp2pdht *dht.IpfsDHT
libp2p, err := libp2p.New(ctx,
libp2p.Identity(privKey),
libp2p.DefaultListenAddrs,
//libp2p.ListenAddrs(defaultIP6ListenAddr),
libp2p.DefaultTransports,
libp2p.Routing(func(h host.Host) (r routing.PeerRouting, err error) {
libp2pdht, err = dht.New(ctx, h)
if err != nil {
return nil, err
}
libp2pdht.Validator = libP2PValidator{}
r = libp2pdht
return
}),
libp2p.EnableAutoRelay(),
libp2p.EnableRelay(circuit.OptHop),
)
if err != nil {
panic(err)
}
libp2ppubsub, err := pubsub.NewFloodSub(context.Background(), libp2p, []pubsub.Option{
pubsub.WithMessageSigning(true),
}...)
if err != nil {
panic(err)
}
fmt.Println("Our public key:", privKey.GetPublic())
fmt.Println("Our node ID:", libp2p.ID())
fmt.Println("Our addresses:", libp2p.Addrs())
cfg.Matrix.ServerName = gomatrixserverlib.ServerName(libp2p.ID().String())
return &P2PDendrite{
Base: *baseDendrite,
LibP2P: libp2p,
LibP2PContext: ctx,
LibP2PCancel: cancel,
LibP2PDHT: libp2pdht,
LibP2PPubsub: libp2ppubsub,
}
}
type libP2PValidator struct {
KeyBook pstore.KeyBook
}
func (v libP2PValidator) Validate(key string, value []byte) error {
ns, _, err := record.SplitKey(key)
if err != nil || ns != "matrix" {
return errors.New("not Matrix path")
}
return nil
}
func (v libP2PValidator) Select(k string, vals [][]byte) (int, error) {
return 0, nil
}
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