318 lines
8.8 KiB
Go
318 lines
8.8 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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"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/enode"
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"github.com/ethereum/go-ethereum/rpc"
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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 := enode.Parse(enode.ValidSchemes, 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 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 := enode.Parse(enode.ValidSchemes, 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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// AddTrustedPeer allows a remote node to always connect, even if slots are full
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func (api *PrivateAdminAPI) AddTrustedPeer(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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node, err := enode.Parse(enode.ValidSchemes, 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.AddTrustedPeer(node)
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return true, nil
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}
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// RemoveTrustedPeer removes a remote node from the trusted peer set, but it
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// does not disconnect it automatically.
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func (api *PrivateAdminAPI) RemoveTrustedPeer(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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node, err := enode.Parse(enode.ValidSchemes, 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.RemoveTrustedPeer(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, vhosts *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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allowedVHosts := api.node.config.HTTPVirtualHosts
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if vhosts != nil {
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allowedVHosts = nil
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for _, vhost := range strings.Split(*host, ",") {
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allowedVHosts = append(allowedVHosts, strings.TrimSpace(vhost))
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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, allowedVHosts, api.node.config.HTTPTimeouts, api.node.config.WSOrigins); 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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// StopWS 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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// 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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