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https://github.com/liloew/gvn.git
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lilo
117 lines
2.9 KiB
Go
117 lines
2.9 KiB
Go
/*
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Copyright © 2022 lilo <luolee.me@gmail.com>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package p2p
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import (
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"encoding/binary"
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"fmt"
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"net"
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"github.com/libp2p/go-libp2p"
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"github.com/libp2p/go-libp2p-core/crypto"
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"github.com/libp2p/go-libp2p-core/host"
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"github.com/libp2p/go-libp2p-core/network"
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"github.com/liloew/gvn/route"
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"github.com/sirupsen/logrus"
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"github.com/songgao/water/waterutil"
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)
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type MessageType uint
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type Publish interface {
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Publish(subnets []string)
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}
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const (
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MessageTypeOnline MessageType = iota
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MessageTypeOffline
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MessageTypeRoute
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)
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type Message struct {
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Id string `json:"id"`
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MessageType MessageType `json:"messageType"`
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Vip string `json:"vip"`
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Subnets []string `json:subnets`
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}
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var (
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Streams = make(map[string]network.Stream)
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VIP string
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)
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func init() {
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}
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func NewPeer(priKey string, port uint) (host.Host, error) {
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pk, err := crypto.UnmarshalPrivateKey([]byte(priKey))
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if err != nil {
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return nil, err
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}
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host, err := libp2p.New(
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libp2p.ListenAddrStrings(fmt.Sprintf("/ip4/0.0.0.0/tcp/%d", port)),
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libp2p.Identity(pk),
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libp2p.ForceReachabilityPublic(),
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libp2p.FallbackDefaults,
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)
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if err != nil {
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return host, err
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}
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// defer host.Close()
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logrus.WithFields(logrus.Fields{
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"Addrs": host.Addrs(),
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"ID": host.ID(),
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"PEERS": host.Peerstore().Peers(),
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}).Debug("create Peer successful")
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return host, nil
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}
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func ForwardPacket(host host.Host, zone string, packets []byte, vipNet *net.IPNet) {
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dst := waterutil.IPv4Destination(packets)
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if peerId, found, err := route.Route.Get(dst.String()); err == nil && found {
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if stream, ok := Streams[peerId.(string)]; ok {
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binary.Write(stream, binary.LittleEndian, uint16(len(packets)))
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if n, err := stream.Write(packets); n != len(packets) || err != nil {
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logrus.WithFields(logrus.Fields{
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"ERROR": err,
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"SIZE": n,
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}).Error("Forward to stream error")
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if err.Error() == "stream reset" {
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stream.Close()
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delete(Streams, peerId.(string))
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}
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}
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} else {
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// make new stream
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if s := NewStream(host, zone, peerId.(string)); s != nil {
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Streams[peerId.(string)] = s
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ForwardPacket(host, zone, packets, vipNet)
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} else {
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logrus.WithFields(logrus.Fields{
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"ERROR": err,
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}).Error("Forward to stream error")
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}
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}
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} else {
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// discard
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logrus.WithFields(logrus.Fields{
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"SRC": waterutil.IPv4Source(packets).String(),
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"DST": dst,
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}).Error("Discard")
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}
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}
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