// The first thing to do after a connection is established is to exchange version.
// For kaiju it goes as follows:
// 1. Send out my version message, if outgoing == true
// 2. Expect the remote peer send it's version message
// 3. Once the message from remote peer is received, send verack
// 4. Send out my version message, if outgoing == false
// 5. Done, knet.Peer starts to work
func (p *Peer) versionHankshake() error {
// Step 1
if p.outgoing {
err := p.sendVersionMsg()
if err != nil {
return err
}
}
// Step 2
msg, err := btcmsg.ReadMsg(p.conn)
if err != nil {
return err
} else {
if ver, ok := msg.(*btcmsg.Message_version); ok {
// TODO: more check
p.info = ver.Addr_from
} else {
return errors.New("Wrong message type when doing versionHankshake")
}
}
// Step 3
vamsg := btcmsg.NewVerAckMsg()
err = btcmsg.WriteMsg(p.conn, vamsg)
if err != nil {
return err
}
// Step 4
if !p.outgoing {
err := p.sendVersionMsg()
if err != nil {
return err
}
}
return nil
}
func (p *Peer) loopReceiveMsg() {
for {
msg, err := btcmsg.ReadMsg(p.conn)
if err != nil {
//log.Infof("loopReceiveMsg error: %s", err.Error())
break
} else {
if !p.handleMessage(msg) {
p.onPeerMsg(p.handle, msg)
}
}
}
p.cleanUp()
}