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authorPéter Szilágyi <peterke@gmail.com>2015-09-01 22:35:14 +0800
committerPéter Szilágyi <peterke@gmail.com>2015-10-19 15:03:09 +0800
commit92f9a3e5fa29e0f05c81b348b87cab4f7a94f0c8 (patch)
tree77a19060ee7b46cd7819894babe24130b952c4ca /eth/handler.go
parent10ed107ba2001d1aabba3d319ba88c5ce6e8fdc0 (diff)
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cmd, eth: support switching client modes of operation
Diffstat (limited to 'eth/handler.go')
-rw-r--r--eth/handler.go40
1 files changed, 22 insertions, 18 deletions
diff --git a/eth/handler.go b/eth/handler.go
index 3fc909672..5716350af 100644
--- a/eth/handler.go
+++ b/eth/handler.go
@@ -17,6 +17,7 @@
package eth
import (
+ "errors"
"fmt"
"math"
"math/big"
@@ -42,6 +43,10 @@ const (
estHeaderRlpSize = 500 // Approximate size of an RLP encoded block header
)
+// errIncompatibleConfig is returned if the requested protocols and configs are
+// not compatible (low protocol version restrictions and high requirements).
+var errIncompatibleConfig = errors.New("incompatible configuration")
+
func errResp(code errCode, format string, v ...interface{}) error {
return fmt.Errorf("%v - %v", code, fmt.Sprintf(format, v...))
}
@@ -49,17 +54,8 @@ func errResp(code errCode, format string, v ...interface{}) error {
type hashFetcherFn func(common.Hash) error
type blockFetcherFn func([]common.Hash) error
-// extProt is an interface which is passed around so we can expose GetHashes and GetBlock without exposing it to the rest of the protocol
-// extProt is passed around to peers which require to GetHashes and GetBlocks
-type extProt struct {
- getHashes hashFetcherFn
- getBlocks blockFetcherFn
-}
-
-func (ep extProt) GetHashes(hash common.Hash) error { return ep.getHashes(hash) }
-func (ep extProt) GetBlock(hashes []common.Hash) error { return ep.getBlocks(hashes) }
-
type ProtocolManager struct {
+ mode Mode
txpool txPool
blockchain *core.BlockChain
chaindb ethdb.Database
@@ -87,9 +83,10 @@ type ProtocolManager struct {
// NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
// with the ethereum network.
-func NewProtocolManager(networkId int, mux *event.TypeMux, txpool txPool, pow pow.PoW, blockchain *core.BlockChain, chaindb ethdb.Database) *ProtocolManager {
+func NewProtocolManager(mode Mode, networkId int, mux *event.TypeMux, txpool txPool, pow pow.PoW, blockchain *core.BlockChain, chaindb ethdb.Database) (*ProtocolManager, error) {
// Create the protocol manager with the base fields
manager := &ProtocolManager{
+ mode: mode,
eventMux: mux,
txpool: txpool,
blockchain: blockchain,
@@ -100,11 +97,15 @@ func NewProtocolManager(networkId int, mux *event.TypeMux, txpool txPool, pow po
quitSync: make(chan struct{}),
}
// Initiate a sub-protocol for every implemented version we can handle
- manager.SubProtocols = make([]p2p.Protocol, len(ProtocolVersions))
- for i := 0; i < len(manager.SubProtocols); i++ {
- version := ProtocolVersions[i]
-
- manager.SubProtocols[i] = p2p.Protocol{
+ manager.SubProtocols = make([]p2p.Protocol, 0, len(ProtocolVersions))
+ for i, version := range ProtocolVersions {
+ // Skip protocol version if incompatible with the mode of operation
+ if minimumProtocolVersion[mode] > version {
+ continue
+ }
+ // Compatible, initialize the sub-protocol
+ version := version // Closure for the run
+ manager.SubProtocols = append(manager.SubProtocols, p2p.Protocol{
Name: "eth",
Version: version,
Length: ProtocolLengths[i],
@@ -113,7 +114,10 @@ func NewProtocolManager(networkId int, mux *event.TypeMux, txpool txPool, pow po
manager.newPeerCh <- peer
return manager.handle(peer)
},
- }
+ })
+ }
+ if len(manager.SubProtocols) == 0 {
+ return nil, errIncompatibleConfig
}
// Construct the different synchronisation mechanisms
manager.downloader = downloader.New(manager.eventMux, manager.blockchain.HasBlock, manager.blockchain.GetBlock, manager.blockchain.CurrentBlock, manager.blockchain.GetTd, manager.blockchain.InsertChain, manager.removePeer)
@@ -126,7 +130,7 @@ func NewProtocolManager(networkId int, mux *event.TypeMux, txpool txPool, pow po
}
manager.fetcher = fetcher.New(manager.blockchain.GetBlock, validator, manager.BroadcastBlock, heighter, manager.blockchain.InsertChain, manager.removePeer)
- return manager
+ return manager, nil
}
func (pm *ProtocolManager) removePeer(id string) {