mirror of https://github.com/poanetwork/quorum.git
681 lines
19 KiB
Go
681 lines
19 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package node
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import (
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"errors"
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"net"
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"os"
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"path/filepath"
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"reflect"
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"strings"
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"sync"
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"syscall"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/internal/debug"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/syndtr/goleveldb/leveldb/storage"
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)
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var (
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ErrDatadirUsed = errors.New("datadir already used")
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ErrNodeStopped = errors.New("node not started")
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ErrNodeRunning = errors.New("node already running")
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ErrServiceUnknown = errors.New("unknown service")
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datadirInUseErrnos = map[uint]bool{11: true, 32: true, 35: true}
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)
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// Node is a container on which services can be registered.
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type Node struct {
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eventmux *event.TypeMux // Event multiplexer used between the services of a stack
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config *Config
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accman *accounts.Manager
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ephemeralKeystore string // if non-empty, the key directory that will be removed by Stop
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instanceDirLock storage.Storage // prevents concurrent use of instance directory
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serverConfig p2p.Config
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server *p2p.Server // Currently running P2P networking layer
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serviceFuncs []ServiceConstructor // Service constructors (in dependency order)
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services map[reflect.Type]Service // Currently running services
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rpcAPIs []rpc.API // List of APIs currently provided by the node
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inprocHandler *rpc.Server // In-process RPC request handler to process the API requests
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ipcEndpoint string // IPC endpoint to listen at (empty = IPC disabled)
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ipcListener net.Listener // IPC RPC listener socket to serve API requests
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ipcHandler *rpc.Server // IPC RPC request handler to process the API requests
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httpEndpoint string // HTTP endpoint (interface + port) to listen at (empty = HTTP disabled)
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httpWhitelist []string // HTTP RPC modules to allow through this endpoint
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httpListener net.Listener // HTTP RPC listener socket to server API requests
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httpHandler *rpc.Server // HTTP RPC request handler to process the API requests
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wsEndpoint string // Websocket endpoint (interface + port) to listen at (empty = websocket disabled)
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wsListener net.Listener // Websocket RPC listener socket to server API requests
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wsHandler *rpc.Server // Websocket RPC request handler to process the API requests
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stop chan struct{} // Channel to wait for termination notifications
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lock sync.RWMutex
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}
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// New creates a new P2P node, ready for protocol registration.
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func New(conf *Config) (*Node, error) {
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// Copy config and resolve the datadir so future changes to the current
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// working directory don't affect the node.
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confCopy := *conf
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conf = &confCopy
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if conf.DataDir != "" {
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absdatadir, err := filepath.Abs(conf.DataDir)
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if err != nil {
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return nil, err
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}
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conf.DataDir = absdatadir
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}
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// Ensure that the instance name doesn't cause weird conflicts with
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// other files in the data directory.
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if strings.ContainsAny(conf.Name, `/\`) {
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return nil, errors.New(`Config.Name must not contain '/' or '\'`)
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}
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if conf.Name == datadirDefaultKeyStore {
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return nil, errors.New(`Config.Name cannot be "` + datadirDefaultKeyStore + `"`)
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}
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if strings.HasSuffix(conf.Name, ".ipc") {
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return nil, errors.New(`Config.Name cannot end in ".ipc"`)
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}
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// Ensure that the AccountManager method works before the node has started.
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// We rely on this in cmd/geth.
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am, ephemeralKeystore, err := makeAccountManager(conf)
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if err != nil {
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return nil, err
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}
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// Note: any interaction with Config that would create/touch files
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// in the data directory or instance directory is delayed until Start.
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return &Node{
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accman: am,
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ephemeralKeystore: ephemeralKeystore,
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config: conf,
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serviceFuncs: []ServiceConstructor{},
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ipcEndpoint: conf.IPCEndpoint(),
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httpEndpoint: conf.HTTPEndpoint(),
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wsEndpoint: conf.WSEndpoint(),
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eventmux: new(event.TypeMux),
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}, nil
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}
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// Register injects a new service into the node's stack. The service created by
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// the passed constructor must be unique in its type with regard to sibling ones.
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func (n *Node) Register(constructor ServiceConstructor) error {
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n.lock.Lock()
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defer n.lock.Unlock()
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if n.server != nil {
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return ErrNodeRunning
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}
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n.serviceFuncs = append(n.serviceFuncs, constructor)
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return nil
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}
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// Start create a live P2P node and starts running it.
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func (n *Node) Start() error {
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n.lock.Lock()
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defer n.lock.Unlock()
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// Short circuit if the node's already running
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if n.server != nil {
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return ErrNodeRunning
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}
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if err := n.openDataDir(); err != nil {
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return err
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}
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// Initialize the p2p server. This creates the node key and
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// discovery databases.
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n.serverConfig = p2p.Config{
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PrivateKey: n.config.NodeKey(),
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Name: n.config.NodeName(),
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Discovery: !n.config.NoDiscovery,
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BootstrapNodes: n.config.BootstrapNodes,
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StaticNodes: n.config.StaticNodes(),
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TrustedNodes: n.config.TrusterNodes(),
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NodeDatabase: n.config.NodeDB(),
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ListenAddr: n.config.ListenAddr,
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NAT: n.config.NAT,
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Dialer: n.config.Dialer,
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NoDial: n.config.NoDial,
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MaxPeers: n.config.MaxPeers,
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MaxPendingPeers: n.config.MaxPendingPeers,
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EnableNodePermission: n.config.EnableNodePermission,
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DataDir: n.config.DataDir,
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}
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running := &p2p.Server{Config: n.serverConfig}
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glog.V(logger.Info).Infoln("instance:", n.serverConfig.Name)
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// Otherwise copy and specialize the P2P configuration
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services := make(map[reflect.Type]Service)
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for _, constructor := range n.serviceFuncs {
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// Create a new context for the particular service
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ctx := &ServiceContext{
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config: n.config,
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services: make(map[reflect.Type]Service),
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EventMux: n.eventmux,
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AccountManager: n.accman,
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}
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for kind, s := range services { // copy needed for threaded access
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ctx.services[kind] = s
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}
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// Construct and save the service
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service, err := constructor(ctx)
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if err != nil {
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return err
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}
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kind := reflect.TypeOf(service)
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if _, exists := services[kind]; exists {
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return &DuplicateServiceError{Kind: kind}
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}
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services[kind] = service
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}
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// Gather the protocols and start the freshly assembled P2P server
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for _, service := range services {
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running.Protocols = append(running.Protocols, service.Protocols()...)
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}
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if err := running.Start(); err != nil {
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if errno, ok := err.(syscall.Errno); ok && datadirInUseErrnos[uint(errno)] {
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return ErrDatadirUsed
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}
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return err
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}
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// Start each of the services
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started := []reflect.Type{}
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for kind, service := range services {
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// Start the next service, stopping all previous upon failure
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if err := service.Start(running); err != nil {
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for _, kind := range started {
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services[kind].Stop()
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}
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running.Stop()
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return err
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}
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// Mark the service started for potential cleanup
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started = append(started, kind)
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}
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// Lastly start the configured RPC interfaces
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if err := n.startRPC(services); err != nil {
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for _, service := range services {
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service.Stop()
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}
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running.Stop()
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return err
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}
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// Finish initializing the startup
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n.services = services
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n.server = running
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n.stop = make(chan struct{})
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return nil
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}
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func (n *Node) openDataDir() error {
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if n.config.DataDir == "" {
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return nil // ephemeral
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}
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instdir := filepath.Join(n.config.DataDir, n.config.name())
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if err := os.MkdirAll(instdir, 0700); err != nil {
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return err
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}
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// Try to open the instance directory as LevelDB storage. This creates a lock file
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// which prevents concurrent use by another instance as well as accidental use of the
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// instance directory as a database.
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storage, err := storage.OpenFile(instdir, true)
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if err != nil {
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return err
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}
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n.instanceDirLock = storage
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return nil
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}
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// startRPC is a helper method to start all the various RPC endpoint during node
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// startup. It's not meant to be called at any time afterwards as it makes certain
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// assumptions about the state of the node.
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func (n *Node) startRPC(services map[reflect.Type]Service) error {
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// Gather all the possible APIs to surface
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apis := n.apis()
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for _, service := range services {
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apis = append(apis, service.APIs()...)
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}
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// Start the various API endpoints, terminating all in case of errors
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if err := n.startInProc(apis); err != nil {
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return err
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}
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if err := n.startIPC(apis); err != nil {
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n.stopInProc()
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return err
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}
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if err := n.startHTTP(n.httpEndpoint, apis, n.config.HTTPModules, n.config.HTTPCors); err != nil {
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n.stopIPC()
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n.stopInProc()
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return err
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}
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if err := n.startWS(n.wsEndpoint, apis, n.config.WSModules, n.config.WSOrigins); err != nil {
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n.stopHTTP()
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n.stopIPC()
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n.stopInProc()
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return err
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}
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// All API endpoints started successfully
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n.rpcAPIs = apis
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return nil
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}
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// startInProc initializes an in-process RPC endpoint.
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func (n *Node) startInProc(apis []rpc.API) error {
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// Register all the APIs exposed by the services
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handler := rpc.NewServer()
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for _, api := range apis {
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if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
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return err
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}
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glog.V(logger.Debug).Infof("InProc registered %T under '%s'", api.Service, api.Namespace)
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}
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n.inprocHandler = handler
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return nil
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}
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// stopInProc terminates the in-process RPC endpoint.
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func (n *Node) stopInProc() {
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if n.inprocHandler != nil {
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n.inprocHandler.Stop()
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n.inprocHandler = nil
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}
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}
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// startIPC initializes and starts the IPC RPC endpoint.
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func (n *Node) startIPC(apis []rpc.API) error {
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// Short circuit if the IPC endpoint isn't being exposed
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if n.ipcEndpoint == "" {
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return nil
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}
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// Register all the APIs exposed by the services
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handler := rpc.NewServer()
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for _, api := range apis {
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if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
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return err
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}
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glog.V(logger.Debug).Infof("IPC registered %T under '%s'", api.Service, api.Namespace)
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}
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// All APIs registered, start the IPC listener
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var (
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listener net.Listener
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err error
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)
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if listener, err = rpc.CreateIPCListener(n.ipcEndpoint); err != nil {
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return err
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}
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go func() {
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glog.V(logger.Info).Infof("IPC endpoint opened: %s", n.ipcEndpoint)
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for {
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conn, err := listener.Accept()
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if err != nil {
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// Terminate if the listener was closed
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n.lock.RLock()
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closed := n.ipcListener == nil
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n.lock.RUnlock()
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if closed {
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return
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}
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// Not closed, just some error; report and continue
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glog.V(logger.Error).Infof("IPC accept failed: %v", err)
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continue
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}
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go handler.ServeCodec(rpc.NewJSONCodec(conn), rpc.OptionMethodInvocation|rpc.OptionSubscriptions)
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}
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}()
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// All listeners booted successfully
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n.ipcListener = listener
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n.ipcHandler = handler
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return nil
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}
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// stopIPC terminates the IPC RPC endpoint.
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func (n *Node) stopIPC() {
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if n.ipcListener != nil {
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n.ipcListener.Close()
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n.ipcListener = nil
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glog.V(logger.Info).Infof("IPC endpoint closed: %s", n.ipcEndpoint)
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}
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if n.ipcHandler != nil {
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n.ipcHandler.Stop()
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n.ipcHandler = nil
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}
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}
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// startHTTP initializes and starts the HTTP RPC endpoint.
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func (n *Node) startHTTP(endpoint string, apis []rpc.API, modules []string, cors string) error {
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// Short circuit if the HTTP endpoint isn't being exposed
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if endpoint == "" {
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return nil
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}
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// Generate the whitelist based on the allowed modules
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whitelist := make(map[string]bool)
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for _, module := range modules {
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whitelist[module] = true
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}
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// Register all the APIs exposed by the services
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handler := rpc.NewServer()
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for _, api := range apis {
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if whitelist[api.Namespace] || (len(whitelist) == 0 && api.Public) {
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if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
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return err
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}
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glog.V(logger.Debug).Infof("HTTP registered %T under '%s'", api.Service, api.Namespace)
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}
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}
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// All APIs registered, start the HTTP listener
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var (
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listener net.Listener
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err error
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)
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if listener, err = net.Listen("tcp", endpoint); err != nil {
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return err
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}
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go rpc.NewHTTPServer(cors, handler).Serve(listener)
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glog.V(logger.Info).Infof("HTTP endpoint opened: http://%s", endpoint)
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// All listeners booted successfully
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n.httpEndpoint = endpoint
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n.httpListener = listener
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n.httpHandler = handler
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return nil
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}
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// stopHTTP terminates the HTTP RPC endpoint.
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func (n *Node) stopHTTP() {
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if n.httpListener != nil {
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n.httpListener.Close()
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n.httpListener = nil
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glog.V(logger.Info).Infof("HTTP endpoint closed: http://%s", n.httpEndpoint)
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}
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if n.httpHandler != nil {
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n.httpHandler.Stop()
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n.httpHandler = nil
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}
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}
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// startWS initializes and starts the websocket RPC endpoint.
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func (n *Node) startWS(endpoint string, apis []rpc.API, modules []string, wsOrigins string) error {
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// Short circuit if the WS endpoint isn't being exposed
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if endpoint == "" {
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return nil
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}
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// Generate the whitelist based on the allowed modules
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whitelist := make(map[string]bool)
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for _, module := range modules {
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whitelist[module] = true
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}
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// Register all the APIs exposed by the services
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handler := rpc.NewServer()
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for _, api := range apis {
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if whitelist[api.Namespace] || (len(whitelist) == 0 && api.Public) {
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if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
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return err
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}
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glog.V(logger.Debug).Infof("WebSocket registered %T under '%s'", api.Service, api.Namespace)
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}
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}
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// All APIs registered, start the HTTP listener
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var (
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listener net.Listener
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err error
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)
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if listener, err = net.Listen("tcp", endpoint); err != nil {
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return err
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}
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go rpc.NewWSServer(wsOrigins, handler).Serve(listener)
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glog.V(logger.Info).Infof("WebSocket endpoint opened: ws://%s", endpoint)
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// All listeners booted successfully
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n.wsEndpoint = endpoint
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n.wsListener = listener
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n.wsHandler = handler
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return nil
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}
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// stopWS terminates the websocket RPC endpoint.
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func (n *Node) stopWS() {
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if n.wsListener != nil {
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n.wsListener.Close()
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n.wsListener = nil
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glog.V(logger.Info).Infof("WebSocket endpoint closed: ws://%s", n.wsEndpoint)
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}
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if n.wsHandler != nil {
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n.wsHandler.Stop()
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n.wsHandler = nil
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}
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}
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// Stop terminates a running node along with all it's services. In the node was
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// not started, an error is returned.
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func (n *Node) Stop() error {
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n.lock.Lock()
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defer n.lock.Unlock()
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// Short circuit if the node's not running
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if n.server == nil {
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return ErrNodeStopped
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}
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// Terminate the API, services and the p2p server.
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n.stopWS()
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n.stopHTTP()
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n.stopIPC()
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n.rpcAPIs = nil
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failure := &StopError{
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Services: make(map[reflect.Type]error),
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}
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for kind, service := range n.services {
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if err := service.Stop(); err != nil {
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failure.Services[kind] = err
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}
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}
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n.server.Stop()
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n.services = nil
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n.server = nil
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// Release instance directory lock.
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if n.instanceDirLock != nil {
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n.instanceDirLock.Close()
|
|
n.instanceDirLock = nil
|
|
}
|
|
|
|
// unblock n.Wait
|
|
close(n.stop)
|
|
|
|
// Remove the keystore if it was created ephemerally.
|
|
var keystoreErr error
|
|
if n.ephemeralKeystore != "" {
|
|
keystoreErr = os.RemoveAll(n.ephemeralKeystore)
|
|
}
|
|
|
|
if len(failure.Services) > 0 {
|
|
return failure
|
|
}
|
|
if keystoreErr != nil {
|
|
return keystoreErr
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Wait blocks the thread until the node is stopped. If the node is not running
|
|
// at the time of invocation, the method immediately returns.
|
|
func (n *Node) Wait() {
|
|
n.lock.RLock()
|
|
if n.server == nil {
|
|
return
|
|
}
|
|
stop := n.stop
|
|
n.lock.RUnlock()
|
|
|
|
<-stop
|
|
}
|
|
|
|
// Restart terminates a running node and boots up a new one in its place. If the
|
|
// node isn't running, an error is returned.
|
|
func (n *Node) Restart() error {
|
|
if err := n.Stop(); err != nil {
|
|
return err
|
|
}
|
|
if err := n.Start(); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Attach creates an RPC client attached to an in-process API handler.
|
|
func (n *Node) Attach() (*rpc.Client, error) {
|
|
n.lock.RLock()
|
|
defer n.lock.RUnlock()
|
|
|
|
if n.server == nil {
|
|
return nil, ErrNodeStopped
|
|
}
|
|
return rpc.DialInProc(n.inprocHandler), nil
|
|
}
|
|
|
|
// Server retrieves the currently running P2P network layer. This method is meant
|
|
// only to inspect fields of the currently running server, life cycle management
|
|
// should be left to this Node entity.
|
|
func (n *Node) Server() *p2p.Server {
|
|
n.lock.RLock()
|
|
defer n.lock.RUnlock()
|
|
|
|
return n.server
|
|
}
|
|
|
|
// Service retrieves a currently running service registered of a specific type.
|
|
func (n *Node) Service(service interface{}) error {
|
|
n.lock.RLock()
|
|
defer n.lock.RUnlock()
|
|
|
|
// Short circuit if the node's not running
|
|
if n.server == nil {
|
|
return ErrNodeStopped
|
|
}
|
|
// Otherwise try to find the service to return
|
|
element := reflect.ValueOf(service).Elem()
|
|
if running, ok := n.services[element.Type()]; ok {
|
|
element.Set(reflect.ValueOf(running))
|
|
return nil
|
|
}
|
|
return ErrServiceUnknown
|
|
}
|
|
|
|
// DataDir retrieves the current datadir used by the protocol stack.
|
|
func (n *Node) DataDir() string {
|
|
return n.config.DataDir
|
|
}
|
|
|
|
// AccountManager retrieves the account manager used by the protocol stack.
|
|
func (n *Node) AccountManager() *accounts.Manager {
|
|
return n.accman
|
|
}
|
|
|
|
// IPCEndpoint retrieves the current IPC endpoint used by the protocol stack.
|
|
func (n *Node) IPCEndpoint() string {
|
|
return n.ipcEndpoint
|
|
}
|
|
|
|
// HTTPEndpoint retrieves the current HTTP endpoint used by the protocol stack.
|
|
func (n *Node) HTTPEndpoint() string {
|
|
return n.httpEndpoint
|
|
}
|
|
|
|
// WSEndpoint retrieves the current WS endpoint used by the protocol stack.
|
|
func (n *Node) WSEndpoint() string {
|
|
return n.wsEndpoint
|
|
}
|
|
|
|
// EventMux retrieves the event multiplexer used by all the network services in
|
|
// the current protocol stack.
|
|
func (n *Node) EventMux() *event.TypeMux {
|
|
return n.eventmux
|
|
}
|
|
|
|
// OpenDatabase opens an existing database with the given name (or creates one if no
|
|
// previous can be found) from within the node's instance directory. If the node is
|
|
// ephemeral, a memory database is returned.
|
|
func (n *Node) OpenDatabase(name string, cache, handles int) (ethdb.Database, error) {
|
|
if n.config.DataDir == "" {
|
|
return ethdb.NewMemDatabase()
|
|
}
|
|
return ethdb.NewLDBDatabase(n.config.resolvePath(name), cache, handles)
|
|
}
|
|
|
|
// ResolvePath returns the absolute path of a resource in the instance directory.
|
|
func (n *Node) ResolvePath(x string) string {
|
|
return n.config.resolvePath(x)
|
|
}
|
|
|
|
// apis returns the collection of RPC descriptors this node offers.
|
|
func (n *Node) apis() []rpc.API {
|
|
return []rpc.API{
|
|
{
|
|
Namespace: "admin",
|
|
Version: "1.0",
|
|
Service: NewPrivateAdminAPI(n),
|
|
}, {
|
|
Namespace: "admin",
|
|
Version: "1.0",
|
|
Service: NewPublicAdminAPI(n),
|
|
Public: true,
|
|
}, {
|
|
Namespace: "debug",
|
|
Version: "1.0",
|
|
Service: debug.Handler,
|
|
}, {
|
|
Namespace: "debug",
|
|
Version: "1.0",
|
|
Service: NewPublicDebugAPI(n),
|
|
Public: true,
|
|
}, {
|
|
Namespace: "web3",
|
|
Version: "1.0",
|
|
Service: NewPublicWeb3API(n),
|
|
Public: true,
|
|
},
|
|
}
|
|
}
|