forked from TrueCloudLab/neoneo-go
131 lines
2.5 KiB
Go
131 lines
2.5 KiB
Go
package peer
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"time"
|
|
|
|
"github.com/CityOfZion/neo-go/pkg/wire"
|
|
"github.com/CityOfZion/neo-go/pkg/wire/payload"
|
|
"github.com/CityOfZion/neo-go/pkg/wire/util/ip"
|
|
)
|
|
|
|
func (p *Peer) Handshake() error {
|
|
|
|
handshakeErr := make(chan error, 1)
|
|
go func() {
|
|
if p.inbound {
|
|
handshakeErr <- p.inboundHandShake()
|
|
} else {
|
|
handshakeErr <- p.outboundHandShake()
|
|
}
|
|
}()
|
|
|
|
select {
|
|
case err := <-handshakeErr:
|
|
if err != nil {
|
|
return err
|
|
}
|
|
case <-time.After(handshakeTimeout):
|
|
return errHandShakeTimeout
|
|
}
|
|
|
|
// This is purely here for Logs
|
|
if p.inbound {
|
|
fmt.Println("inbound handshake with", p.RemoteAddr().String(), "successful")
|
|
} else {
|
|
|
|
fmt.Println("outbound handshake with", p.RemoteAddr().String(), "successful")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// If this peer has an inbound conn (conn that is going into another peer)
|
|
// then he has dialed and so, we must read the version message
|
|
func (p *Peer) inboundHandShake() error {
|
|
var err error
|
|
if err := p.writeLocalVersionMSG(); err != nil {
|
|
return err
|
|
}
|
|
if err := p.readRemoteVersionMSG(); err != nil {
|
|
return err
|
|
}
|
|
verack, err := payload.NewVerackMessage()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = p.Write(verack)
|
|
return p.readVerack()
|
|
}
|
|
func (p *Peer) outboundHandShake() error {
|
|
var err error
|
|
err = p.readRemoteVersionMSG()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
err = p.writeLocalVersionMSG()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
err = p.readVerack()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
verack, err := payload.NewVerackMessage()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return p.Write(verack)
|
|
}
|
|
func (p *Peer) writeLocalVersionMSG() error {
|
|
|
|
nonce := p.config.Nonce
|
|
relay := p.config.Relay
|
|
port := int(p.config.Port)
|
|
ua := p.config.UserAgent
|
|
sh := p.config.StartHeight()
|
|
services := p.config.Services
|
|
proto := p.config.ProtocolVer
|
|
ip := iputils.GetLocalIP()
|
|
tcpAddrMe := &net.TCPAddr{IP: ip, Port: port}
|
|
|
|
messageVer, err := payload.NewVersionMessage(tcpAddrMe, sh, relay, proto, ua, nonce, services)
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return p.Write(messageVer)
|
|
}
|
|
|
|
func (p *Peer) readRemoteVersionMSG() error {
|
|
readmsg, err := wire.ReadMessage(p.conn, p.config.Net)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
version, ok := readmsg.(*payload.VersionMessage)
|
|
if !ok {
|
|
return err
|
|
}
|
|
return p.OnVersion(version)
|
|
}
|
|
|
|
func (p *Peer) readVerack() error {
|
|
readmsg, err := wire.ReadMessage(p.conn, p.config.Net)
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, ok := readmsg.(*payload.VerackMessage)
|
|
|
|
if !ok {
|
|
return err
|
|
}
|
|
// should only be accessed on one go-routine
|
|
p.verackReceived = true
|
|
|
|
return nil
|
|
}
|