forked from cerc-io/plugeth
9feec51e2d
This commit introduces a network simulation framework which can be used to run simulated networks of devp2p nodes. The intention is to use this for testing protocols, performing benchmarks and visualising emergent network behaviour.
386 lines
11 KiB
Go
386 lines
11 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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"context"
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"fmt"
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"strings"
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"time"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/discover"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/rcrowley/go-metrics"
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)
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// PrivateAdminAPI is the collection of administrative API methods exposed only
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// over a secure RPC channel.
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type PrivateAdminAPI struct {
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node *Node // Node interfaced by this API
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}
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// NewPrivateAdminAPI creates a new API definition for the private admin methods
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// of the node itself.
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func NewPrivateAdminAPI(node *Node) *PrivateAdminAPI {
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return &PrivateAdminAPI{node: node}
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}
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// AddPeer requests connecting to a remote node, and also maintaining the new
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// connection at all times, even reconnecting if it is lost.
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func (api *PrivateAdminAPI) AddPeer(url string) (bool, error) {
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// Make sure the server is running, fail otherwise
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server := api.node.Server()
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if server == nil {
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return false, ErrNodeStopped
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}
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// Try to add the url as a static peer and return
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node, err := discover.ParseNode(url)
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if err != nil {
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return false, fmt.Errorf("invalid enode: %v", err)
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}
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server.AddPeer(node)
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return true, nil
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}
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// RemovePeer disconnects from a a remote node if the connection exists
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func (api *PrivateAdminAPI) RemovePeer(url string) (bool, error) {
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// Make sure the server is running, fail otherwise
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server := api.node.Server()
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if server == nil {
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return false, ErrNodeStopped
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}
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// Try to remove the url as a static peer and return
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node, err := discover.ParseNode(url)
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if err != nil {
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return false, fmt.Errorf("invalid enode: %v", err)
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}
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server.RemovePeer(node)
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return true, nil
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}
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// PeerEvents creates an RPC subscription which receives peer events from the
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// node's p2p.Server
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func (api *PrivateAdminAPI) PeerEvents(ctx context.Context) (*rpc.Subscription, error) {
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// Make sure the server is running, fail otherwise
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server := api.node.Server()
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if server == nil {
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return nil, ErrNodeStopped
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}
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// Create the subscription
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notifier, supported := rpc.NotifierFromContext(ctx)
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if !supported {
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return nil, rpc.ErrNotificationsUnsupported
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}
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rpcSub := notifier.CreateSubscription()
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go func() {
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events := make(chan *p2p.PeerEvent)
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sub := server.SubscribeEvents(events)
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defer sub.Unsubscribe()
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for {
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select {
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case event := <-events:
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notifier.Notify(rpcSub.ID, event)
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case <-sub.Err():
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return
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case <-rpcSub.Err():
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return
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case <-notifier.Closed():
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return
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}
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}
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}()
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return rpcSub, nil
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}
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// StartRPC starts the HTTP RPC API server.
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func (api *PrivateAdminAPI) StartRPC(host *string, port *int, cors *string, apis *string) (bool, error) {
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api.node.lock.Lock()
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defer api.node.lock.Unlock()
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if api.node.httpHandler != nil {
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return false, fmt.Errorf("HTTP RPC already running on %s", api.node.httpEndpoint)
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}
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if host == nil {
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h := DefaultHTTPHost
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if api.node.config.HTTPHost != "" {
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h = api.node.config.HTTPHost
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}
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host = &h
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}
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if port == nil {
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port = &api.node.config.HTTPPort
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}
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allowedOrigins := api.node.config.HTTPCors
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if cors != nil {
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allowedOrigins = nil
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for _, origin := range strings.Split(*cors, ",") {
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allowedOrigins = append(allowedOrigins, strings.TrimSpace(origin))
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}
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}
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modules := api.node.httpWhitelist
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if apis != nil {
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modules = nil
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for _, m := range strings.Split(*apis, ",") {
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modules = append(modules, strings.TrimSpace(m))
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}
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}
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if err := api.node.startHTTP(fmt.Sprintf("%s:%d", *host, *port), api.node.rpcAPIs, modules, allowedOrigins); err != nil {
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return false, err
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}
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return true, nil
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}
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// StopRPC terminates an already running HTTP RPC API endpoint.
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func (api *PrivateAdminAPI) StopRPC() (bool, error) {
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api.node.lock.Lock()
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defer api.node.lock.Unlock()
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if api.node.httpHandler == nil {
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return false, fmt.Errorf("HTTP RPC not running")
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}
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api.node.stopHTTP()
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return true, nil
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}
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// StartWS starts the websocket RPC API server.
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func (api *PrivateAdminAPI) StartWS(host *string, port *int, allowedOrigins *string, apis *string) (bool, error) {
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api.node.lock.Lock()
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defer api.node.lock.Unlock()
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if api.node.wsHandler != nil {
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return false, fmt.Errorf("WebSocket RPC already running on %s", api.node.wsEndpoint)
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}
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if host == nil {
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h := DefaultWSHost
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if api.node.config.WSHost != "" {
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h = api.node.config.WSHost
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}
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host = &h
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}
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if port == nil {
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port = &api.node.config.WSPort
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}
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origins := api.node.config.WSOrigins
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if allowedOrigins != nil {
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origins = nil
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for _, origin := range strings.Split(*allowedOrigins, ",") {
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origins = append(origins, strings.TrimSpace(origin))
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}
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}
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modules := api.node.config.WSModules
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if apis != nil {
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modules = nil
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for _, m := range strings.Split(*apis, ",") {
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modules = append(modules, strings.TrimSpace(m))
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}
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}
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if err := api.node.startWS(fmt.Sprintf("%s:%d", *host, *port), api.node.rpcAPIs, modules, origins, api.node.config.WSExposeAll); err != nil {
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return false, err
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}
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return true, nil
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}
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// StopRPC terminates an already running websocket RPC API endpoint.
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func (api *PrivateAdminAPI) StopWS() (bool, error) {
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api.node.lock.Lock()
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defer api.node.lock.Unlock()
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if api.node.wsHandler == nil {
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return false, fmt.Errorf("WebSocket RPC not running")
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}
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api.node.stopWS()
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return true, nil
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}
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// PublicAdminAPI is the collection of administrative API methods exposed over
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// both secure and unsecure RPC channels.
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type PublicAdminAPI struct {
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node *Node // Node interfaced by this API
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}
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// NewPublicAdminAPI creates a new API definition for the public admin methods
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// of the node itself.
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func NewPublicAdminAPI(node *Node) *PublicAdminAPI {
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return &PublicAdminAPI{node: node}
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}
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// Peers retrieves all the information we know about each individual peer at the
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// protocol granularity.
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func (api *PublicAdminAPI) Peers() ([]*p2p.PeerInfo, error) {
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server := api.node.Server()
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if server == nil {
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return nil, ErrNodeStopped
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}
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return server.PeersInfo(), nil
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}
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// NodeInfo retrieves all the information we know about the host node at the
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// protocol granularity.
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func (api *PublicAdminAPI) NodeInfo() (*p2p.NodeInfo, error) {
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server := api.node.Server()
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if server == nil {
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return nil, ErrNodeStopped
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}
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return server.NodeInfo(), nil
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}
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// Datadir retrieves the current data directory the node is using.
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func (api *PublicAdminAPI) Datadir() string {
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return api.node.DataDir()
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}
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// PublicDebugAPI is the collection of debugging related API methods exposed over
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// both secure and unsecure RPC channels.
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type PublicDebugAPI struct {
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node *Node // Node interfaced by this API
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}
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// NewPublicDebugAPI creates a new API definition for the public debug methods
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// of the node itself.
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func NewPublicDebugAPI(node *Node) *PublicDebugAPI {
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return &PublicDebugAPI{node: node}
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}
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// Metrics retrieves all the known system metric collected by the node.
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func (api *PublicDebugAPI) Metrics(raw bool) (map[string]interface{}, error) {
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// Create a rate formatter
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units := []string{"", "K", "M", "G", "T", "E", "P"}
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round := func(value float64, prec int) string {
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unit := 0
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for value >= 1000 {
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unit, value, prec = unit+1, value/1000, 2
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}
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return fmt.Sprintf(fmt.Sprintf("%%.%df%s", prec, units[unit]), value)
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}
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format := func(total float64, rate float64) string {
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return fmt.Sprintf("%s (%s/s)", round(total, 0), round(rate, 2))
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}
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// Iterate over all the metrics, and just dump for now
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counters := make(map[string]interface{})
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metrics.DefaultRegistry.Each(func(name string, metric interface{}) {
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// Create or retrieve the counter hierarchy for this metric
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root, parts := counters, strings.Split(name, "/")
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for _, part := range parts[:len(parts)-1] {
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if _, ok := root[part]; !ok {
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root[part] = make(map[string]interface{})
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}
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root = root[part].(map[string]interface{})
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}
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name = parts[len(parts)-1]
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// Fill the counter with the metric details, formatting if requested
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if raw {
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switch metric := metric.(type) {
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case metrics.Meter:
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root[name] = map[string]interface{}{
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"AvgRate01Min": metric.Rate1(),
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"AvgRate05Min": metric.Rate5(),
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"AvgRate15Min": metric.Rate15(),
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"MeanRate": metric.RateMean(),
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"Overall": float64(metric.Count()),
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}
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case metrics.Timer:
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root[name] = map[string]interface{}{
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"AvgRate01Min": metric.Rate1(),
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"AvgRate05Min": metric.Rate5(),
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"AvgRate15Min": metric.Rate15(),
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"MeanRate": metric.RateMean(),
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"Overall": float64(metric.Count()),
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"Percentiles": map[string]interface{}{
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"5": metric.Percentile(0.05),
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"20": metric.Percentile(0.2),
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"50": metric.Percentile(0.5),
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"80": metric.Percentile(0.8),
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"95": metric.Percentile(0.95),
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},
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}
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default:
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root[name] = "Unknown metric type"
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}
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} else {
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switch metric := metric.(type) {
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case metrics.Meter:
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root[name] = map[string]interface{}{
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"Avg01Min": format(metric.Rate1()*60, metric.Rate1()),
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"Avg05Min": format(metric.Rate5()*300, metric.Rate5()),
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"Avg15Min": format(metric.Rate15()*900, metric.Rate15()),
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"Overall": format(float64(metric.Count()), metric.RateMean()),
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}
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case metrics.Timer:
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root[name] = map[string]interface{}{
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"Avg01Min": format(metric.Rate1()*60, metric.Rate1()),
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"Avg05Min": format(metric.Rate5()*300, metric.Rate5()),
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"Avg15Min": format(metric.Rate15()*900, metric.Rate15()),
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"Overall": format(float64(metric.Count()), metric.RateMean()),
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"Maximum": time.Duration(metric.Max()).String(),
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"Minimum": time.Duration(metric.Min()).String(),
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"Percentiles": map[string]interface{}{
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"5": time.Duration(metric.Percentile(0.05)).String(),
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"20": time.Duration(metric.Percentile(0.2)).String(),
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"50": time.Duration(metric.Percentile(0.5)).String(),
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"80": time.Duration(metric.Percentile(0.8)).String(),
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"95": time.Duration(metric.Percentile(0.95)).String(),
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},
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}
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default:
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root[name] = "Unknown metric type"
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}
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}
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})
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return counters, nil
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}
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// PublicWeb3API offers helper utils
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type PublicWeb3API struct {
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stack *Node
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}
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// NewPublicWeb3API creates a new Web3Service instance
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func NewPublicWeb3API(stack *Node) *PublicWeb3API {
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return &PublicWeb3API{stack}
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}
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// ClientVersion returns the node name
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func (s *PublicWeb3API) ClientVersion() string {
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return s.stack.Server().Name
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}
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// Sha3 applies the ethereum sha3 implementation on the input.
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// It assumes the input is hex encoded.
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func (s *PublicWeb3API) Sha3(input hexutil.Bytes) hexutil.Bytes {
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return crypto.Keccak256(input)
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}
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