forked from Consensys/quorum
/
handler_client.go
99 lines (90 loc) · 3.17 KB
/
handler_client.go
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package qlight
import (
"fmt"
"github.com/ethereum/go-ethereum/eth/protocols/eth"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/enr"
)
// MakeProtocols constructs the P2P protocol definitions for `eth`.
func MakeProtocolsClient(backend Backend, network uint64, dnsdisc enode.Iterator) []p2p.Protocol {
protocols := make([]p2p.Protocol, 1)
version := uint(QLIGHT65)
protocols[0] = p2p.Protocol{
Name: ProtocolName,
Version: QLIGHT65,
Length: QLightProtocolLength,
Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
ethPeer := eth.NewPeerNoBroadcast(version, p, rw, backend.TxPool())
peer := NewPeer(version, p, rw, ethPeer)
defer ethPeer.Close()
defer peer.Close()
return backend.RunQPeer(peer, func(peer *Peer) error {
return HandleClient(backend, peer)
})
},
NodeInfo: func() interface{} {
return eth.NodeInfoFunc(backend.Chain(), network)
},
PeerInfo: func(id enode.ID) interface{} {
return backend.PeerInfo(id)
},
Attributes: []enr.Entry{eth.CurrentENREntry(backend.Chain())},
DialCandidates: dnsdisc,
}
return protocols
}
// Handle is invoked whenever an `eth` connection is made that successfully passes
// the protocol handshake. This method will keep processing messages until the
// connection is torn down.
func HandleClient(backend Backend, peer *Peer) error {
for {
if err := handleMessageClient(backend, peer); err != nil {
return err
}
}
}
// handleMessage is invoked whenever an inbound message is received from a remote
// peer. The remote connection is torn down upon returning any error.
func handleMessageClient(backend Backend, peer *Peer) error {
// Read the next message from the remote peer, and ensure it's fully consumed
msg, err := peer.rw.ReadMsg()
if err != nil {
return err
}
if msg.Size > maxMessageSize {
return fmt.Errorf("%w: %v > %v", errMsgTooLarge, msg.Size, maxMessageSize)
}
defer msg.Discard()
peer.Log().Info("QLight client message received", "msg", msg.Code)
var handlers = eth.ETH_65_FULL_SYNC
switch msg.Code {
case eth.BlockHeadersMsg:
if handler := handlers[msg.Code]; handler != nil {
return handler(backend, msg, peer.EthPeer)
}
case eth.TransactionsMsg:
return qlightClientHandleTransactions(backend, msg, peer)
case eth.BlockBodiesMsg:
res := new(eth.BlockBodiesPacket)
if err := msg.Decode(res); err != nil {
return fmt.Errorf("%w: message %v: %v", errDecode, msg, err)
}
return backend.QHandle(peer, res)
case eth.NewBlockHashesMsg:
if handler := handlers[msg.Code]; handler != nil {
return handler(backend, msg, peer.EthPeer)
}
case QLightNewBlockPrivateDataMsg:
peer.Log().Info("QLight Received block private data message", "msg", msg.Code)
return qlightClientHandleNewBlockPrivateData(backend, msg, peer)
case eth.NewBlockMsg:
return qlightClientHandleNewBlock(backend, msg, peer)
case eth.NewPooledTransactionHashesMsg:
if handler := handlers[msg.Code]; handler != nil {
return handler(backend, msg, peer.EthPeer)
}
}
peer.Log().Info("QLight Unable to find handler for received message", "msg", msg.Code)
return fmt.Errorf("%w: %v", errInvalidMsgCode, msg.Code)
}