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159 lines
2.8 KiB
159 lines
2.8 KiB
package main
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import (
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"os"
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"os/signal"
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"github.com/tendermint/tendermint/config"
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"github.com/tendermint/tendermint/p2p"
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)
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const (
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minNumPeers = 10
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maxNumPeers = 20
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ensurePeersPeriodSeconds = 30
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peerDialTimeoutSeconds = 30
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)
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type Node struct {
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sw *p2p.Switch
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book *p2p.AddressBook
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quit chan struct{}
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}
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func NewNode() *Node {
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// Define channels for our app
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chDescs := []p2p.ChannelDescriptor{
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p2p.ChannelDescriptor{
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Name: "PEX",
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SendBufferSize: 2,
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RecvBufferSize: 2,
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},
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p2p.ChannelDescriptor{
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Name: "block",
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SendBufferSize: 10,
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RecvBufferSize: 10,
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},
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p2p.ChannelDescriptor{
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Name: "mempool",
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SendBufferSize: 100,
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RecvBufferSize: 100,
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},
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p2p.ChannelDescriptor{
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Name: "consensus",
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SendBufferSize: 1000,
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RecvBufferSize: 1000,
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},
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}
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sw := p2p.NewSwitch(chDescs)
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book := p2p.NewAddrBook(config.AppDir + "/addrbook.json")
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return &New{
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sw: sw,
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book: book,
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}
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}
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func (n *Node) Start() {
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n.sw.Start()
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n.book.Start()
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go p2p.PexHandler(sw, book)
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go n.ensurePeersHandler(sw, book)
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}
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func (n *Node) initPeer(peer *Peer) {
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if peer.IsOutgoing() {
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// TODO: initiate PEX
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}
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}
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// Add a Listener to accept incoming peer connections.
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func (n *Node) AddListener(l Listener) {
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go func() {
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for {
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inConn, ok := <-l.Connections()
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if !ok {
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break
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}
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peer, err := n.sw.AddPeerWithConnection(inConn, false)
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if err != nil {
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log.Infof("Ignoring error from incoming connection: %v\n%v",
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peer, err)
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continue
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}
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n.initPeer(peer)
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}
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}()
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}
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// Ensures that sufficient peers are connected.
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func (n *Node) ensurePeers() {
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numPeers := len(n.sw.Peers())
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if numPeers < minNumPeers {
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// XXX
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}
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}
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func (n *Node) ensurePeersHandler() {
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timer := NewRepeatTimer(ensurePeersPeriodSeconds * time.Second)
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FOR_LOOP:
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for {
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select {
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case <-timer.Ch:
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n.ensurePeers()
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case <-n.quit:
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break FOR_LOOP
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}
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}
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// cleanup
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timer.Stop()
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}
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func (n *Node) Stop() {
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// TODO: gracefully disconnect from peers.
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n.sw.Stop()
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n.book.Stop()
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}
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//-----------------------------------------------------------------------------
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func main() {
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n := NewNode()
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l := p2p.NewDefaultListener("tcp", ":8001")
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n.AddListener()
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if false {
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// TODO remove
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// let's connect to 66.175.218.199
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conn, err := p2p.NewNetAddressString("66.175.218.199:8001").Dial()
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if err != nil {
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log.Infof("Error connecting to it: %v", err)
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return
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}
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peer, err := sw.AddPeerWithConnection(conn, true)
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if err != nil {
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log.Infof("Error adding peer with connection: %v", err)
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return
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}
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log.Infof("Connected to peer: %v", peer)
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// TODO remove
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}
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// Sleep forever
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trapSignal()
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select {}
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}
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func trapSignal() {
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c := make(chan os.Signal, 1)
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signal.Notify(c, os.Interrupt)
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go func() {
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for sig := range c {
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log.Infof("captured %v, exiting..", sig)
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os.Exit(1)
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}
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}()
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}
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