Updated seed peers

ethereum.go

@@ -72,10 +72,13 @@ func (s *Ethereum) AddPeer(conn net.Conn) {
 	peer := NewPeer(conn, s, true)
 
 	if peer != nil {
-		s.peers.PushBack(peer)
-		peer.Start()
-
-		log.Println("Peer connected ::", conn.RemoteAddr())
+		if s.peers.Len() > -1 {
+			log.Println("SEED")
+			peer.Start(true)
+		} else {
+			s.peers.PushBack(peer)
+			peer.Start(false)
+		}
 	}
 }
 
@@ -164,8 +167,9 @@ func (s *Ethereum) Start() {
 	} else {
 		// Starting accepting connections
 		go func() {
+			log.Println("Ready and accepting connections")
+
 			for {
-				log.Println("Ready and accepting connections")
 				conn, err := ln.Accept()
 				if err != nil {
 					log.Println(err)

peer.go

@@ -42,6 +42,9 @@ type Peer struct {
 	// Indicates whether a MsgGetPeersTy was requested of the peer
 	// this to prevent receiving false peers.
 	requestedPeerList bool
+
+	// Determines whether this is a seed peer
+	seed bool
 }
 
 func NewPeer(conn net.Conn, ethereum *Ethereum, inbound bool) *Peer {
@@ -81,9 +84,7 @@ func NewOutboundPeer(addr string, ethereum *Ethereum) *Peer {
 		atomic.StoreInt32(&p.connected, 1)
 		atomic.StoreInt32(&p.disconnect, 0)
 
-		log.Println("Connected to peer ::", conn.RemoteAddr())
-
-		p.Start()
+		p.Start(false)
 	}()
 
 	return p
@@ -115,6 +116,14 @@ func (p *Peer) writeMessage(msg *ethwire.Msg) {
 		p.Stop()
 		return
 	}
+
+	// XXX TMP CODE FOR TESTNET
+	switch msg.Type {
+	case ethwire.MsgPeersTy:
+		if p.seed {
+			p.Stop()
+		}
+	}
 }
 
 // Outbound message handler. Outbound messages are handled here
@@ -133,7 +142,7 @@ out:
 		case <-tickleTimer.C:
 			p.writeMessage(ethwire.NewMessage(ethwire.MsgPingTy, ""))
 
-		// Break out of the for loop if a quit message is posted
+			// Break out of the for loop if a quit message is posted
 		case <-p.quit:
 			break out
 		}
@@ -157,113 +166,118 @@ func (p *Peer) HandleInbound() {
 out:
 	for atomic.LoadInt32(&p.disconnect) == 0 {
 		// Wait for a message from the peer
-		msg, err := ethwire.ReadMessage(p.conn)
-		if err != nil {
-			log.Println(err)
+		msgs, err := ethwire.ReadMessages(p.conn)
+		for _, msg := range msgs {
+			if err != nil {
+				log.Println(err)
 
-			break out
-		}
-
-		if ethutil.Config.Debug {
-			log.Printf("Received %s\n", msg.Type.String())
-		}
+				break out
+			}
 
-		switch msg.Type {
-		case ethwire.MsgHandshakeTy:
-			// Version message
-			p.handleHandshake(msg)
-		case ethwire.MsgDiscTy:
-			p.Stop()
-		case ethwire.MsgPingTy:
-			// Respond back with pong
-			p.QueueMessage(ethwire.NewMessage(ethwire.MsgPongTy, ""))
-		case ethwire.MsgPongTy:
-			// If we received a pong back from a peer we set the
-			// last pong so the peer handler knows this peer is still
-			// active.
-			p.lastPong = time.Now().Unix()
-		case ethwire.MsgBlockTy:
-			// Get all blocks and process them (TODO reverse order?)
-			msg.Data = msg.Data.Get(0)
-			for i := msg.Data.Length() - 1; i >= 0; i-- {
-				block := ethchain.NewBlockFromRlpValue(msg.Data.Get(i))
-				err := p.ethereum.BlockManager.ProcessBlock(block)
-
-				if err != nil {
-					log.Println(err)
+			switch msg.Type {
+			case ethwire.MsgHandshakeTy:
+				// Version message
+				p.handleHandshake(msg)
+			case ethwire.MsgDiscTy:
+				p.Stop()
+			case ethwire.MsgPingTy:
+				// Respond back with pong
+				p.QueueMessage(ethwire.NewMessage(ethwire.MsgPongTy, ""))
+			case ethwire.MsgPongTy:
+				// If we received a pong back from a peer we set the
+				// last pong so the peer handler knows this peer is still
+				// active.
+				p.lastPong = time.Now().Unix()
+			case ethwire.MsgBlockTy:
+				// Get all blocks and process them
+				msg.Data = msg.Data
+				for i := msg.Data.Length() - 1; i >= 0; i-- {
+					block := ethchain.NewBlockFromRlpValue(msg.Data.Get(i))
+					err := p.ethereum.BlockManager.ProcessBlock(block)
+
+					if err != nil {
+						log.Println(err)
+					}
 				}
-			}
-		case ethwire.MsgTxTy:
-			// If the message was a transaction queue the transaction
-			// in the TxPool where it will undergo validation and
-			// processing when a new block is found
-			for i := 0; i < msg.Data.Length(); i++ {
-				p.ethereum.TxPool.QueueTransaction(ethchain.NewTransactionFromRlpValue(msg.Data.Get(i)))
-			}
-		case ethwire.MsgGetPeersTy:
-			// Flag this peer as a 'requested of new peers' this to
-			// prevent malicious peers being forced.
-			p.requestedPeerList = true
-			// Peer asked for list of connected peers
-			p.pushPeers()
-		case ethwire.MsgPeersTy:
-			// Received a list of peers (probably because MsgGetPeersTy was send)
-			// Only act on message if we actually requested for a peers list
-			if p.requestedPeerList {
-				data := ethutil.Conv(msg.Data)
-				// Create new list of possible peers for the ethereum to process
-				peers := make([]string, data.Length())
-				// Parse each possible peer
-				for i := 0; i < data.Length(); i++ {
-					peers[i] = data.Get(i).AsString() + strconv.Itoa(int(data.Get(i).AsUint()))
+			case ethwire.MsgTxTy:
+				// If the message was a transaction queue the transaction
+				// in the TxPool where it will undergo validation and
+				// processing when a new block is found
+				for i := 0; i < msg.Data.Length(); i++ {
+					p.ethereum.TxPool.QueueTransaction(ethchain.NewTransactionFromRlpValue(msg.Data.Get(i)))
 				}
+			case ethwire.MsgGetPeersTy:
+				// Flag this peer as a 'requested of new peers' this to
+				// prevent malicious peers being forced.
+				p.requestedPeerList = true
+				// Peer asked for list of connected peers
+				p.pushPeers()
+			case ethwire.MsgPeersTy:
+				// Received a list of peers (probably because MsgGetPeersTy was send)
+				// Only act on message if we actually requested for a peers list
+				if p.requestedPeerList {
+					data := ethutil.Conv(msg.Data)
+					// Create new list of possible peers for the ethereum to process
+					peers := make([]string, data.Length())
+					// Parse each possible peer
+					for i := 0; i < data.Length(); i++ {
+						peers[i] = data.Get(i).AsString() + strconv.Itoa(int(data.Get(i).AsUint()))
+					}
+
+					// Connect to the list of peers
+					p.ethereum.ProcessPeerList(peers)
+					// Mark unrequested again
+					p.requestedPeerList = false
 
-				// Connect to the list of peers
-				p.ethereum.ProcessPeerList(peers)
-				// Mark unrequested again
-				p.requestedPeerList = false
-			}
-		case ethwire.MsgGetChainTy:
-			var parent *ethchain.Block
-			// FIXME
-			msg.Data = msg.Data.Get(0)
-			// Length minus one since the very last element in the array is a count
-			l := msg.Data.Length() - 1
-			// Amount of parents in the canonical chain
-			amountOfBlocks := msg.Data.Get(l).AsUint()
-			// Check each SHA block hash from the message and determine whether
-			// the SHA is in the database
-			for i := 0; i < l; i++ {
-				if data := msg.Data.Get(i).AsBytes(); p.ethereum.BlockManager.BlockChain().HasBlock(data) {
-					parent = p.ethereum.BlockManager.BlockChain().GetBlock(data)
+				}
+			case ethwire.MsgGetChainTy:
+				var parent *ethchain.Block
+				// Length minus one since the very last element in the array is a count
+				l := msg.Data.Length() - 1
+				// Ignore empty get chains
+				if l <= 1 {
 					break
 				}
-			}
 
-			// If a parent is found send back a reply
-			if parent != nil {
-				chain := p.ethereum.BlockManager.BlockChain().GetChainFromHash(parent.Hash(), amountOfBlocks)
-				p.QueueMessage(ethwire.NewMessage(ethwire.MsgBlockTy, chain))
-			} else {
-				// If no blocks are found we send back a reply with msg not in chain
-				// and the last hash from get chain
-				lastHash := msg.Data.Get(l)
-				p.QueueMessage(ethwire.NewMessage(ethwire.MsgNotInChainTy, lastHash.AsRaw()))
-			}
-		case ethwire.MsgNotInChainTy:
-			log.Println("Not in chain, not yet implemented")
-			// TODO
+				// Amount of parents in the canonical chain
+				amountOfBlocks := msg.Data.Get(l).AsUint()
+				// Check each SHA block hash from the message and determine whether
+				// the SHA is in the database
+				for i := 0; i < l; i++ {
+					if data := msg.Data.Get(i).AsBytes(); p.ethereum.BlockManager.BlockChain().HasBlock(data) {
+						parent = p.ethereum.BlockManager.BlockChain().GetBlock(data)
+						break
+					}
+				}
+
+				// If a parent is found send back a reply
+				if parent != nil {
+					chain := p.ethereum.BlockManager.BlockChain().GetChainFromHash(parent.Hash(), amountOfBlocks)
+					p.QueueMessage(ethwire.NewMessage(ethwire.MsgBlockTy, append(chain, amountOfBlocks)))
+				} else {
+					// If no blocks are found we send back a reply with msg not in chain
+					// and the last hash from get chain
+					lastHash := msg.Data.Get(l - 1)
+					log.Printf("Sending not in chain with hash %x\n", lastHash.AsRaw())
+					p.QueueMessage(ethwire.NewMessage(ethwire.MsgNotInChainTy, []interface{}{lastHash.AsRaw()}))
+				}
+			case ethwire.MsgNotInChainTy:
+				log.Printf("Not in chain %x\n", msg.Data)
+				// TODO
 
-		// Unofficial but fun nonetheless
-		case ethwire.MsgTalkTy:
-			log.Printf("%v says: %s\n", p.conn.RemoteAddr(), msg.Data.Get(0).AsString())
+				// Unofficial but fun nonetheless
+			case ethwire.MsgTalkTy:
+				log.Printf("%v says: %s\n", p.conn.RemoteAddr(), msg.Data.AsString())
+			}
 		}
 	}
 
 	p.Stop()
 }
 
-func (p *Peer) Start() {
+func (p *Peer) Start(seed bool) {
+	p.seed = seed
+
 	if !p.inbound {
 		err := p.pushHandshake()
 		if err != nil {
@@ -277,6 +291,7 @@ func (p *Peer) Start() {
 	go p.HandleOutbound()
 	// Run the inbound handler in a new goroutine
 	go p.HandleInbound()
+
 }
 
 func (p *Peer) Stop() {
@@ -294,9 +309,9 @@ func (p *Peer) Stop() {
 }
 
 func (p *Peer) pushHandshake() error {
-	msg := ethwire.NewMessage(ethwire.MsgHandshakeTy, ethutil.Encode([]interface{}{
-		1, 0, p.ethereum.Nonce,
-	}))
+	msg := ethwire.NewMessage(ethwire.MsgHandshakeTy, []interface{}{
+		uint32(0), uint32(0), "/Ethereum(G) v0.0.1/",
+	})
 
 	p.QueueMessage(msg)
 
@@ -305,6 +320,7 @@ func (p *Peer) pushHandshake() error {
 
 // Pushes the list of outbound peers to the client when requested
 func (p *Peer) pushPeers() {
+
 	outPeers := make([]interface{}, len(p.ethereum.OutboundPeers()))
 	// Serialise each peer
 	for i, peer := range p.ethereum.OutboundPeers() {
@@ -312,7 +328,7 @@ func (p *Peer) pushPeers() {
 	}
 
 	// Send message to the peer with the known list of connected clients
-	msg := ethwire.NewMessage(ethwire.MsgPeersTy, ethutil.Encode(outPeers))
+	msg := ethwire.NewMessage(ethwire.MsgPeersTy, outPeers)
 
 	p.QueueMessage(msg)
 }
@@ -320,29 +336,28 @@ func (p *Peer) pushPeers() {
 func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 	c := msg.Data
 	// [PROTOCOL_VERSION, NETWORK_ID, CLIENT_ID]
-	if c.Get(2).AsUint() == p.ethereum.Nonce {
-		//if msg.Nonce == p.ethereum.Nonce {
-		log.Println("Peer connected to self, disconnecting")
-
-		p.Stop()
-
-		return
-	}
-
 	p.versionKnown = true
 
+	var istr string
 	// If this is an inbound connection send an ack back
 	if p.inbound {
-		err := p.pushHandshake()
-		if err != nil {
-			log.Println("Peer can't send ack back")
+		/*
+			err := p.pushHandshake()
+			if err != nil {
+				log.Println("Peer can't send ack back")
 
-			p.Stop()
-		}
+				p.Stop()
+			}
+		*/
+		istr = "inbound"
 	} else {
 		msg := ethwire.NewMessage(ethwire.MsgGetChainTy, []interface{}{p.ethereum.BlockManager.BlockChain().CurrentBlock.Hash(), uint64(100)})
 		p.QueueMessage(msg)
+
+		istr = "outbound"
 	}
+
+	log.Printf("peer connect (%s) %v %s\n", istr, p.conn.RemoteAddr(), c.Get(2).AsString())
 }
 
 func (p *Peer) RlpEncode() []byte {