private network support

- protocolversion, networkid global int flags to cli and mist
- fix bug with protocolversion check using wrong db
- log protocolversion & networkid in backend

eth/backend.go

@@ -38,7 +38,10 @@ var (
 )
 
 type Config struct {
-	Name      string
+	Name            string
+	ProtocolVersion int
+	NetworkId       int
+
 	DataDir   string
 	LogFile   string
 	LogLevel  int
@@ -135,14 +138,16 @@ type Ethereum struct {
 
 	logger logger.LogSystem
 
-	Mining  bool
-	DataDir string
-	version string
+	Mining          bool
+	DataDir         string
+	version         string
+	ProtocolVersion int
+	NetworkId       int
 }
 
 func New(config *Config) (*Ethereum, error) {
 	// Boostrap database
-	servlogger := logger.New(config.DataDir, config.LogFile, config.LogLevel, config.LogFormat)
+	servlogsystem := logger.New(config.DataDir, config.LogFile, config.LogLevel, config.LogFormat)
 
 	newdb := config.NewDB
 	if newdb == nil {
@@ -159,13 +164,14 @@ func New(config *Config) (*Ethereum, error) {
 	extraDb, err := ethdb.NewLDBDatabase(path.Join(config.DataDir, "extra"))
 
 	// Perform database sanity checks
-	d, _ := blockDb.Get([]byte("ProtocolVersion"))
-	protov := common.NewValue(d).Uint()
-	if protov != ProtocolVersion && protov != 0 {
+	d, _ := extraDb.Get([]byte("ProtocolVersion"))
+	protov := int(common.NewValue(d).Uint())
+	if protov != config.ProtocolVersion && protov != 0 {
 		path := path.Join(config.DataDir, "blockchain")
-		return nil, fmt.Errorf("Database version mismatch. Protocol(%d / %d). `rm -rf %s`", protov, ProtocolVersion, path)
+		return nil, fmt.Errorf("Database version mismatch. Protocol(%d / %d). `rm -rf %s`", protov, config.ProtocolVersion, path)
 	}
-	saveProtocolVersion(extraDb)
+	saveProtocolVersion(extraDb, config.ProtocolVersion)
+	servlogger.Infof("Protocol Version: %v, Network Id: %v", config.ProtocolVersion, config.NetworkId)
 
 	eth := &Ethereum{
 		shutdownChan:   make(chan bool),
@@ -173,7 +179,7 @@ func New(config *Config) (*Ethereum, error) {
 		stateDb:        stateDb,
 		extraDb:        extraDb,
 		eventMux:       &event.TypeMux{},
-		logger:         servlogger,
+		logger:         servlogsystem,
 		accountManager: config.AccountManager,
 		DataDir:        config.DataDir,
 		version:        config.Name, // TODO should separate from Name
@@ -195,7 +201,8 @@ func New(config *Config) (*Ethereum, error) {
 	if err != nil {
 		return nil, err
 	}
-	ethProto := EthProtocol(eth.txPool, eth.chainManager, eth.blockPool)
+
+	ethProto := EthProtocol(config.ProtocolVersion, config.NetworkId, eth.txPool, eth.chainManager, eth.blockPool)
 	protocols := []p2p.Protocol{ethProto}
 	if config.Shh {
 		protocols = append(protocols, eth.whisper.Protocol())
@@ -412,11 +419,11 @@ func (self *Ethereum) blockBroadcastLoop() {
 	}
 }
 
-func saveProtocolVersion(db common.Database) {
+func saveProtocolVersion(db common.Database, protov int) {
 	d, _ := db.Get([]byte("ProtocolVersion"))
 	protocolVersion := common.NewValue(d).Uint()
 
 	if protocolVersion == 0 {
-		db.Put([]byte("ProtocolVersion"), common.NewValue(ProtocolVersion).Bytes())
+		db.Put([]byte("ProtocolVersion"), common.NewValue(protov).Bytes())
 	}
 }

eth/protocol.go

@@ -5,9 +5,9 @@ import (
 	"fmt"
 	"math/big"
 
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/errs"
-	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/rlp"
@@ -59,13 +59,15 @@ var errorToString = map[int]string{
 // ethProtocol represents the ethereum wire protocol
 // instance is running on each peer
 type ethProtocol struct {
-	txPool       txPool
-	chainManager chainManager
-	blockPool    blockPool
-	peer         *p2p.Peer
-	id           string
-	rw           p2p.MsgReadWriter
-	errors       *errs.Errors
+	txPool          txPool
+	chainManager    chainManager
+	blockPool       blockPool
+	peer            *p2p.Peer
+	id              string
+	rw              p2p.MsgReadWriter
+	errors          *errs.Errors
+	protocolVersion int
+	networkId       int
 }
 
 // backend is the interface the ethereum protocol backend should implement
@@ -102,27 +104,29 @@ type getBlockHashesMsgData struct {
 // main entrypoint, wrappers starting a server running the eth protocol
 // use this constructor to attach the protocol ("class") to server caps
 // the Dev p2p layer then runs the protocol instance on each peer
-func EthProtocol(txPool txPool, chainManager chainManager, blockPool blockPool) p2p.Protocol {
+func EthProtocol(protocolVersion, networkId int, txPool txPool, chainManager chainManager, blockPool blockPool) p2p.Protocol {
 	return p2p.Protocol{
 		Name:    "eth",
-		Version: ProtocolVersion,
+		Version: uint(protocolVersion),
 		Length:  ProtocolLength,
 		Run: func(peer *p2p.Peer, rw p2p.MsgReadWriter) error {
-			return runEthProtocol(txPool, chainManager, blockPool, peer, rw)
+			return runEthProtocol(protocolVersion, networkId, txPool, chainManager, blockPool, peer, rw)
 		},
 	}
 }
 
 // the main loop that handles incoming messages
 // note RemovePeer in the post-disconnect hook
-func runEthProtocol(txPool txPool, chainManager chainManager, blockPool blockPool, peer *p2p.Peer, rw p2p.MsgReadWriter) (err error) {
+func runEthProtocol(protocolVersion, networkId int, txPool txPool, chainManager chainManager, blockPool blockPool, peer *p2p.Peer, rw p2p.MsgReadWriter) (err error) {
 	id := peer.ID()
 	self := &ethProtocol{
-		txPool:       txPool,
-		chainManager: chainManager,
-		blockPool:    blockPool,
-		rw:           rw,
-		peer:         peer,
+		txPool:          txPool,
+		chainManager:    chainManager,
+		blockPool:       blockPool,
+		rw:              rw,
+		peer:            peer,
+		protocolVersion: protocolVersion,
+		networkId:       networkId,
 		errors: &errs.Errors{
 			Package: "ETH",
 			Errors:  errorToString,
@@ -290,8 +294,8 @@ func (self *ethProtocol) statusMsg() p2p.Msg {
 	td, currentBlock, genesisBlock := self.chainManager.Status()
 
 	return p2p.NewMsg(StatusMsg,
-		uint32(ProtocolVersion),
-		uint32(NetworkId),
+		uint32(self.protocolVersion),
+		uint32(self.networkId),
 		td,
 		currentBlock,
 		genesisBlock,
@@ -329,12 +333,12 @@ func (self *ethProtocol) handleStatus() error {
 		return self.protoError(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, genesisBlock)
 	}
 
-	if status.NetworkId != NetworkId {
-		return self.protoError(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, NetworkId)
+	if int(status.NetworkId) != self.networkId {
+		return self.protoError(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, self.networkId)
 	}
 
-	if ProtocolVersion != status.ProtocolVersion {
-		return self.protoError(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, ProtocolVersion)
+	if int(status.ProtocolVersion) != self.protocolVersion {
+		return self.protoError(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, self.protocolVersion)
 	}
 
 	self.peer.Infof("Peer is [eth] capable (%d/%d). TD=%v H=%x\n", status.ProtocolVersion, status.NetworkId, status.TD, status.CurrentBlock[:4])

eth/protocol_test.go

@@ -9,10 +9,10 @@ import (
 	"testing"
 	"time"
 
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/errs"
-	"github.com/ethereum/go-ethereum/common"
 	ethlogger "github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/p2p/discover"
@@ -235,8 +235,8 @@ func TestStatusMsgErrors(t *testing.T) {
 	var status statusMsgData
 	eth.checkMsg(0, StatusMsg, &status) // first outgoing msg should be StatusMsg
 	if status.TD.Cmp(td) != 0 ||
-		status.ProtocolVersion != ProtocolVersion ||
-		status.NetworkId != NetworkId ||
+		status.ProtocolVersion != eth.ProtocolVersion ||
+		status.NetworkId != eth.NetworkId ||
 		status.TD.Cmp(td) != 0 ||
 		bytes.Compare(status.CurrentBlock, currentBlock) != 0 ||
 		bytes.Compare(status.GenesisBlock, genesis) != 0 {