diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS index ec2efb10e3..b50561172f 100644 --- a/.github/CODEOWNERS +++ b/.github/CODEOWNERS @@ -21,7 +21,4 @@ light/ @zsfelfoldi @rjl493456442 node/ @fjl p2p/ @fjl @zsfelfoldi rpc/ @fjl @holiman -p2p/simulations @fjl -p2p/protocols @fjl -p2p/testing @fjl signer/ @holiman diff --git a/cmd/p2psim/main.go b/cmd/p2psim/main.go deleted file mode 100644 index a0f5f0d288..0000000000 --- a/cmd/p2psim/main.go +++ /dev/null @@ -1,443 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of go-ethereum. -// -// go-ethereum is free software: you can redistribute it and/or modify -// it under the terms of the GNU General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// go-ethereum is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. -// -// You should have received a copy of the GNU General Public License -// along with go-ethereum. If not, see . - -// p2psim provides a command-line client for a simulation HTTP API. -// -// Here is an example of creating a 2 node network with the first node -// connected to the second: -// -// $ p2psim node create -// Created node01 -// -// $ p2psim node start node01 -// Started node01 -// -// $ p2psim node create -// Created node02 -// -// $ p2psim node start node02 -// Started node02 -// -// $ p2psim node connect node01 node02 -// Connected node01 to node02 -package main - -import ( - "context" - "encoding/json" - "fmt" - "io" - "os" - "strings" - "text/tabwriter" - - "github.com/ethereum/go-ethereum/crypto" - "github.com/ethereum/go-ethereum/internal/flags" - "github.com/ethereum/go-ethereum/p2p" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/simulations" - "github.com/ethereum/go-ethereum/p2p/simulations/adapters" - "github.com/ethereum/go-ethereum/rpc" - "github.com/urfave/cli/v2" -) - -var client *simulations.Client - -var ( - // global command flags - apiFlag = &cli.StringFlag{ - Name: "api", - Value: "http://localhost:8888", - Usage: "simulation API URL", - EnvVars: []string{"P2PSIM_API_URL"}, - } - - // events subcommand flags - currentFlag = &cli.BoolFlag{ - Name: "current", - Usage: "get existing nodes and conns first", - } - filterFlag = &cli.StringFlag{ - Name: "filter", - Value: "", - Usage: "message filter", - } - - // node create subcommand flags - nameFlag = &cli.StringFlag{ - Name: "name", - Value: "", - Usage: "node name", - } - servicesFlag = &cli.StringFlag{ - Name: "services", - Value: "", - Usage: "node services (comma separated)", - } - keyFlag = &cli.StringFlag{ - Name: "key", - Value: "", - Usage: "node private key (hex encoded)", - } - - // node rpc subcommand flags - subscribeFlag = &cli.BoolFlag{ - Name: "subscribe", - Usage: "method is a subscription", - } -) - -func main() { - app := flags.NewApp("devp2p simulation command-line client") - app.Flags = []cli.Flag{ - apiFlag, - } - app.Before = func(ctx *cli.Context) error { - client = simulations.NewClient(ctx.String(apiFlag.Name)) - return nil - } - app.Commands = []*cli.Command{ - { - Name: "show", - Usage: "show network information", - Action: showNetwork, - }, - { - Name: "events", - Usage: "stream network events", - Action: streamNetwork, - Flags: []cli.Flag{ - currentFlag, - filterFlag, - }, - }, - { - Name: "snapshot", - Usage: "create a network snapshot to stdout", - Action: createSnapshot, - }, - { - Name: "load", - Usage: "load a network snapshot from stdin", - Action: loadSnapshot, - }, - { - Name: "node", - Usage: "manage simulation nodes", - Action: listNodes, - Subcommands: []*cli.Command{ - { - Name: "list", - Usage: "list nodes", - Action: listNodes, - }, - { - Name: "create", - Usage: "create a node", - Action: createNode, - Flags: []cli.Flag{ - nameFlag, - servicesFlag, - keyFlag, - }, - }, - { - Name: "show", - ArgsUsage: "", - Usage: "show node information", - Action: showNode, - }, - { - Name: "start", - ArgsUsage: "", - Usage: "start a node", - Action: startNode, - }, - { - Name: "stop", - ArgsUsage: "", - Usage: "stop a node", - Action: stopNode, - }, - { - Name: "connect", - ArgsUsage: " ", - Usage: "connect a node to a peer node", - Action: connectNode, - }, - { - Name: "disconnect", - ArgsUsage: " ", - Usage: "disconnect a node from a peer node", - Action: disconnectNode, - }, - { - Name: "rpc", - ArgsUsage: " []", - Usage: "call a node RPC method", - Action: rpcNode, - Flags: []cli.Flag{ - subscribeFlag, - }, - }, - }, - }, - } - if err := app.Run(os.Args); err != nil { - fmt.Fprintln(os.Stderr, err) - os.Exit(1) - } -} - -func showNetwork(ctx *cli.Context) error { - if ctx.NArg() != 0 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - network, err := client.GetNetwork() - if err != nil { - return err - } - w := tabwriter.NewWriter(ctx.App.Writer, 1, 2, 2, ' ', 0) - defer w.Flush() - fmt.Fprintf(w, "NODES\t%d\n", len(network.Nodes)) - fmt.Fprintf(w, "CONNS\t%d\n", len(network.Conns)) - return nil -} - -func streamNetwork(ctx *cli.Context) error { - if ctx.NArg() != 0 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - events := make(chan *simulations.Event) - sub, err := client.SubscribeNetwork(events, simulations.SubscribeOpts{ - Current: ctx.Bool(currentFlag.Name), - Filter: ctx.String(filterFlag.Name), - }) - if err != nil { - return err - } - defer sub.Unsubscribe() - enc := json.NewEncoder(ctx.App.Writer) - for { - select { - case event := <-events: - if err := enc.Encode(event); err != nil { - return err - } - case err := <-sub.Err(): - return err - } - } -} - -func createSnapshot(ctx *cli.Context) error { - if ctx.NArg() != 0 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - snap, err := client.CreateSnapshot() - if err != nil { - return err - } - return json.NewEncoder(os.Stdout).Encode(snap) -} - -func loadSnapshot(ctx *cli.Context) error { - if ctx.NArg() != 0 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - snap := &simulations.Snapshot{} - if err := json.NewDecoder(os.Stdin).Decode(snap); err != nil { - return err - } - return client.LoadSnapshot(snap) -} - -func listNodes(ctx *cli.Context) error { - if ctx.NArg() != 0 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - nodes, err := client.GetNodes() - if err != nil { - return err - } - w := tabwriter.NewWriter(ctx.App.Writer, 1, 2, 2, ' ', 0) - defer w.Flush() - fmt.Fprintf(w, "NAME\tPROTOCOLS\tID\n") - for _, node := range nodes { - fmt.Fprintf(w, "%s\t%s\t%s\n", node.Name, strings.Join(protocolList(node), ","), node.ID) - } - return nil -} - -func protocolList(node *p2p.NodeInfo) []string { - protos := make([]string, 0, len(node.Protocols)) - for name := range node.Protocols { - protos = append(protos, name) - } - return protos -} - -func createNode(ctx *cli.Context) error { - if ctx.NArg() != 0 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - config := adapters.RandomNodeConfig() - config.Name = ctx.String(nameFlag.Name) - if key := ctx.String(keyFlag.Name); key != "" { - privKey, err := crypto.HexToECDSA(key) - if err != nil { - return err - } - config.ID = enode.PubkeyToIDV4(&privKey.PublicKey) - config.PrivateKey = privKey - } - if services := ctx.String(servicesFlag.Name); services != "" { - config.Lifecycles = strings.Split(services, ",") - } - node, err := client.CreateNode(config) - if err != nil { - return err - } - fmt.Fprintln(ctx.App.Writer, "Created", node.Name) - return nil -} - -func showNode(ctx *cli.Context) error { - if ctx.NArg() != 1 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - nodeName := ctx.Args().First() - node, err := client.GetNode(nodeName) - if err != nil { - return err - } - w := tabwriter.NewWriter(ctx.App.Writer, 1, 2, 2, ' ', 0) - defer w.Flush() - fmt.Fprintf(w, "NAME\t%s\n", node.Name) - fmt.Fprintf(w, "PROTOCOLS\t%s\n", strings.Join(protocolList(node), ",")) - fmt.Fprintf(w, "ID\t%s\n", node.ID) - fmt.Fprintf(w, "ENODE\t%s\n", node.Enode) - for name, proto := range node.Protocols { - fmt.Fprintln(w) - fmt.Fprintf(w, "--- PROTOCOL INFO: %s\n", name) - fmt.Fprintf(w, "%v\n", proto) - fmt.Fprintf(w, "---\n") - } - return nil -} - -func startNode(ctx *cli.Context) error { - if ctx.NArg() != 1 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - nodeName := ctx.Args().First() - if err := client.StartNode(nodeName); err != nil { - return err - } - fmt.Fprintln(ctx.App.Writer, "Started", nodeName) - return nil -} - -func stopNode(ctx *cli.Context) error { - if ctx.NArg() != 1 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - nodeName := ctx.Args().First() - if err := client.StopNode(nodeName); err != nil { - return err - } - fmt.Fprintln(ctx.App.Writer, "Stopped", nodeName) - return nil -} - -func connectNode(ctx *cli.Context) error { - if ctx.NArg() != 2 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - args := ctx.Args() - nodeName := args.Get(0) - peerName := args.Get(1) - if err := client.ConnectNode(nodeName, peerName); err != nil { - return err - } - fmt.Fprintln(ctx.App.Writer, "Connected", nodeName, "to", peerName) - return nil -} - -func disconnectNode(ctx *cli.Context) error { - args := ctx.Args() - if args.Len() != 2 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - nodeName := args.Get(0) - peerName := args.Get(1) - if err := client.DisconnectNode(nodeName, peerName); err != nil { - return err - } - fmt.Fprintln(ctx.App.Writer, "Disconnected", nodeName, "from", peerName) - return nil -} - -func rpcNode(ctx *cli.Context) error { - args := ctx.Args() - if args.Len() < 2 { - return cli.ShowCommandHelp(ctx, ctx.Command.Name) - } - nodeName := args.Get(0) - method := args.Get(1) - rpcClient, err := client.RPCClient(context.Background(), nodeName) - if err != nil { - return err - } - if ctx.Bool(subscribeFlag.Name) { - return rpcSubscribe(rpcClient, ctx.App.Writer, method, args.Slice()[3:]...) - } - var result interface{} - params := make([]interface{}, len(args.Slice()[3:])) - for i, v := range args.Slice()[3:] { - params[i] = v - } - if err := rpcClient.Call(&result, method, params...); err != nil { - return err - } - return json.NewEncoder(ctx.App.Writer).Encode(result) -} - -func rpcSubscribe(client *rpc.Client, out io.Writer, method string, args ...string) error { - namespace, method, _ := strings.Cut(method, "_") - ch := make(chan interface{}) - subArgs := make([]interface{}, len(args)+1) - subArgs[0] = method - for i, v := range args { - subArgs[i+1] = v - } - sub, err := client.Subscribe(context.Background(), namespace, ch, subArgs...) - if err != nil { - return err - } - defer sub.Unsubscribe() - enc := json.NewEncoder(out) - for { - select { - case v := <-ch: - if err := enc.Encode(v); err != nil { - return err - } - case err := <-sub.Err(): - return err - } - } -} diff --git a/p2p/simulations/pipes/pipes.go b/p2p/pipes/pipe.go similarity index 85% rename from p2p/simulations/pipes/pipes.go rename to p2p/pipes/pipe.go index ec277c0d14..cf1f3e2a80 100644 --- a/p2p/simulations/pipes/pipes.go +++ b/p2p/pipes/pipe.go @@ -1,4 +1,4 @@ -// Copyright 2018 The go-ethereum Authors +// Copyright 2024 The go-ethereum Authors // This file is part of the go-ethereum library. // // The go-ethereum library is free software: you can redistribute it and/or modify @@ -16,17 +16,9 @@ package pipes -import ( - "net" -) +import "net" -// NetPipe wraps net.Pipe in a signature returning an error -func NetPipe() (net.Conn, net.Conn, error) { - p1, p2 := net.Pipe() - return p1, p2, nil -} - -// TCPPipe creates an in process full duplex pipe based on a localhost TCP socket +// TCPPipe creates an in process full duplex pipe based on a localhost TCP socket. func TCPPipe() (net.Conn, net.Conn, error) { l, err := net.Listen("tcp", "127.0.0.1:0") if err != nil { diff --git a/p2p/rlpx/rlpx_test.go b/p2p/rlpx/rlpx_test.go index 136cb1b5bf..27d51546e7 100644 --- a/p2p/rlpx/rlpx_test.go +++ b/p2p/rlpx/rlpx_test.go @@ -31,7 +31,7 @@ import ( "github.com/davecgh/go-spew/spew" "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/crypto/ecies" - "github.com/ethereum/go-ethereum/p2p/simulations/pipes" + "github.com/ethereum/go-ethereum/p2p/pipes" "github.com/ethereum/go-ethereum/rlp" "github.com/stretchr/testify/assert" ) diff --git a/p2p/simulations/README.md b/p2p/simulations/README.md deleted file mode 100644 index 1f9f72dcda..0000000000 --- a/p2p/simulations/README.md +++ /dev/null @@ -1,174 +0,0 @@ -# devp2p Simulations - -The `p2p/simulations` package implements a simulation framework that supports -creating a collection of devp2p nodes, connecting them to form a -simulation network, performing simulation actions in that network and then -extracting useful information. - -## Nodes - -Each node in a simulation network runs multiple services by wrapping a collection -of objects which implement the `node.Service` interface meaning they: - -* can be started and stopped -* run p2p protocols -* expose RPC APIs - -This means that any object which implements the `node.Service` interface can be -used to run a node in the simulation. - -## Services - -Before running a simulation, a set of service initializers must be registered -which can then be used to run nodes in the network. - -A service initializer is a function with the following signature: - -```go -func(ctx *adapters.ServiceContext) (node.Service, error) -``` - -These initializers should be registered by calling the `adapters.RegisterServices` -function in an `init()` hook: - -```go -func init() { - adapters.RegisterServices(adapters.Services{ - "service1": initService1, - "service2": initService2, - }) -} -``` - -## Node Adapters - -The simulation framework includes multiple "node adapters" which are -responsible for creating an environment in which a node runs. - -### SimAdapter - -The `SimAdapter` runs nodes in-memory, connecting them using an in-memory, -synchronous `net.Pipe` and connecting to their RPC server using an in-memory -`rpc.Client`. - -### ExecAdapter - -The `ExecAdapter` runs nodes as child processes of the running simulation. - -It does this by executing the binary which is running the simulation but -setting `argv[0]` (i.e. the program name) to `p2p-node` which is then -detected by an init hook in the child process which runs the `node.Service` -using the devp2p node stack rather than executing `main()`. - -The nodes listen for devp2p connections and WebSocket RPC clients on random -localhost ports. - -## Network - -A simulation network is created with an ID and default service. The default -service is used if a node is created without an explicit service. The -network has exposed methods for creating, starting, stopping, connecting -and disconnecting nodes. It also emits events when certain actions occur. - -### Events - -A simulation network emits the following events: - -* node event - when nodes are created / started / stopped -* connection event - when nodes are connected / disconnected -* message event - when a protocol message is sent between two nodes - -The events have a "control" flag which when set indicates that the event is the -outcome of a controlled simulation action (e.g. creating a node or explicitly -connecting two nodes). - -This is in contrast to a non-control event, otherwise called a "live" event, -which is the outcome of something happening in the network as a result of a -control event (e.g. a node actually started up or a connection was actually -established between two nodes). - -Live events are detected by the simulation network by subscribing to node peer -events via RPC when the nodes start up. - -## Testing Framework - -The `Simulation` type can be used in tests to perform actions in a simulation -network and then wait for expectations to be met. - -With a running simulation network, the `Simulation.Run` method can be called -with a `Step` which has the following fields: - -* `Action` - a function that performs some action in the network - -* `Expect` - an expectation function which returns whether or not a - given node meets the expectation - -* `Trigger` - a channel that receives node IDs which then trigger a check - of the expectation function to be performed against that node - -As a concrete example, consider a simulated network of Ethereum nodes. An -`Action` could be the sending of a transaction, `Expect` it being included in -a block, and `Trigger` a check for every block that is mined. - -On return, the `Simulation.Run` method returns a `StepResult` which can be used -to determine if all nodes met the expectation, how long it took them to meet -the expectation and what network events were emitted during the step run. - -## HTTP API - -The simulation framework includes a HTTP API that can be used to control the -simulation. - -The API is initialised with a particular node adapter and has the following -endpoints: - -``` -OPTIONS / Response 200 with "Access-Control-Allow-Headers"" header set to "Content-Type"" -GET / Get network information -POST /start Start all nodes in the network -POST /stop Stop all nodes in the network -POST /mocker/start Start the mocker node simulation -POST /mocker/stop Stop the mocker node simulation -GET /mocker Get a list of available mockers -POST /reset Reset all properties of a network to initial (empty) state -GET /events Stream network events -GET /snapshot Take a network snapshot -POST /snapshot Load a network snapshot -POST /nodes Create a node -GET /nodes Get all nodes in the network -GET /nodes/:nodeid Get node information -POST /nodes/:nodeid/start Start a node -POST /nodes/:nodeid/stop Stop a node -POST /nodes/:nodeid/conn/:peerid Connect two nodes -DELETE /nodes/:nodeid/conn/:peerid Disconnect two nodes -GET /nodes/:nodeid/rpc Make RPC requests to a node via WebSocket -``` - -For convenience, `nodeid` in the URL can be the name of a node rather than its -ID. - -## Command line client - -`p2psim` is a command line client for the HTTP API, located in -`cmd/p2psim`. - -It provides the following commands: - -``` -p2psim show -p2psim events [--current] [--filter=FILTER] -p2psim snapshot -p2psim load -p2psim node create [--name=NAME] [--services=SERVICES] [--key=KEY] -p2psim node list -p2psim node show -p2psim node start -p2psim node stop -p2psim node connect -p2psim node disconnect -p2psim node rpc [] [--subscribe] -``` - -## Example - -See [p2p/simulations/examples/README.md](examples/README.md). diff --git a/p2p/simulations/adapters/exec.go b/p2p/simulations/adapters/exec.go deleted file mode 100644 index 6307b90bf8..0000000000 --- a/p2p/simulations/adapters/exec.go +++ /dev/null @@ -1,567 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package adapters - -import ( - "bytes" - "context" - "encoding/json" - "errors" - "fmt" - "io" - "log/slog" - "net" - "net/http" - "os" - "os/exec" - "os/signal" - "path/filepath" - "strings" - "sync" - "syscall" - "time" - - "github.com/ethereum/go-ethereum/internal/reexec" - "github.com/ethereum/go-ethereum/log" - "github.com/ethereum/go-ethereum/node" - "github.com/ethereum/go-ethereum/p2p" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/rpc" - "github.com/gorilla/websocket" -) - -func init() { - // Register a reexec function to start a simulation node when the current binary is - // executed as "p2p-node" (rather than whatever the main() function would normally do). - reexec.Register("p2p-node", execP2PNode) -} - -// ExecAdapter is a NodeAdapter which runs simulation nodes by executing the current binary -// as a child process. -type ExecAdapter struct { - // BaseDir is the directory under which the data directories for each - // simulation node are created. - BaseDir string - - nodes map[enode.ID]*ExecNode -} - -// NewExecAdapter returns an ExecAdapter which stores node data in -// subdirectories of the given base directory -func NewExecAdapter(baseDir string) *ExecAdapter { - return &ExecAdapter{ - BaseDir: baseDir, - nodes: make(map[enode.ID]*ExecNode), - } -} - -// Name returns the name of the adapter for logging purposes -func (e *ExecAdapter) Name() string { - return "exec-adapter" -} - -// NewNode returns a new ExecNode using the given config -func (e *ExecAdapter) NewNode(config *NodeConfig) (Node, error) { - if len(config.Lifecycles) == 0 { - return nil, errors.New("node must have at least one service lifecycle") - } - for _, service := range config.Lifecycles { - if _, exists := lifecycleConstructorFuncs[service]; !exists { - return nil, fmt.Errorf("unknown node service %q", service) - } - } - - // create the node directory using the first 12 characters of the ID - // as Unix socket paths cannot be longer than 256 characters - dir := filepath.Join(e.BaseDir, config.ID.String()[:12]) - if err := os.Mkdir(dir, 0755); err != nil { - return nil, fmt.Errorf("error creating node directory: %s", err) - } - - err := config.initDummyEnode() - if err != nil { - return nil, err - } - - // generate the config - conf := &execNodeConfig{ - Stack: node.DefaultConfig, - Node: config, - } - if config.DataDir != "" { - conf.Stack.DataDir = config.DataDir - } else { - conf.Stack.DataDir = filepath.Join(dir, "data") - } - - // these parameters are crucial for execadapter node to run correctly - conf.Stack.WSHost = "127.0.0.1" - conf.Stack.WSPort = 0 - conf.Stack.WSOrigins = []string{"*"} - conf.Stack.WSExposeAll = true - conf.Stack.P2P.EnableMsgEvents = config.EnableMsgEvents - conf.Stack.P2P.NoDiscovery = true - conf.Stack.P2P.NAT = nil - - // Listen on a localhost port, which we set when we - // initialise NodeConfig (usually a random port) - conf.Stack.P2P.ListenAddr = fmt.Sprintf(":%d", config.Port) - - node := &ExecNode{ - ID: config.ID, - Dir: dir, - Config: conf, - adapter: e, - } - node.newCmd = node.execCommand - e.nodes[node.ID] = node - return node, nil -} - -// ExecNode starts a simulation node by exec'ing the current binary and -// running the configured services -type ExecNode struct { - ID enode.ID - Dir string - Config *execNodeConfig - Cmd *exec.Cmd - Info *p2p.NodeInfo - - adapter *ExecAdapter - client *rpc.Client - wsAddr string - newCmd func() *exec.Cmd -} - -// Addr returns the node's enode URL -func (n *ExecNode) Addr() []byte { - if n.Info == nil { - return nil - } - return []byte(n.Info.Enode) -} - -// Client returns an rpc.Client which can be used to communicate with the -// underlying services (it is set once the node has started) -func (n *ExecNode) Client() (*rpc.Client, error) { - return n.client, nil -} - -// Start exec's the node passing the ID and service as command line arguments -// and the node config encoded as JSON in an environment variable. -func (n *ExecNode) Start(snapshots map[string][]byte) (err error) { - if n.Cmd != nil { - return errors.New("already started") - } - defer func() { - if err != nil { - n.Stop() - } - }() - - // encode a copy of the config containing the snapshot - confCopy := *n.Config - confCopy.Snapshots = snapshots - confCopy.PeerAddrs = make(map[string]string) - for id, node := range n.adapter.nodes { - confCopy.PeerAddrs[id.String()] = node.wsAddr - } - confData, err := json.Marshal(confCopy) - if err != nil { - return fmt.Errorf("error generating node config: %s", err) - } - // expose the admin namespace via websocket if it's not enabled - exposed := confCopy.Stack.WSExposeAll - if !exposed { - for _, api := range confCopy.Stack.WSModules { - if api == "admin" { - exposed = true - break - } - } - } - if !exposed { - confCopy.Stack.WSModules = append(confCopy.Stack.WSModules, "admin") - } - // start the one-shot server that waits for startup information - ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) - defer cancel() - statusURL, statusC := n.waitForStartupJSON(ctx) - - // start the node - cmd := n.newCmd() - cmd.Stdout = os.Stdout - cmd.Stderr = os.Stderr - cmd.Env = append(os.Environ(), - envStatusURL+"="+statusURL, - envNodeConfig+"="+string(confData), - ) - if err := cmd.Start(); err != nil { - return fmt.Errorf("error starting node: %s", err) - } - n.Cmd = cmd - - // Wait for the node to start. - status := <-statusC - if status.Err != "" { - return errors.New(status.Err) - } - client, err := rpc.DialWebsocket(ctx, status.WSEndpoint, "") - if err != nil { - return fmt.Errorf("can't connect to RPC server: %v", err) - } - - // Node ready :) - n.client = client - n.wsAddr = status.WSEndpoint - n.Info = status.NodeInfo - return nil -} - -// waitForStartupJSON runs a one-shot HTTP server to receive a startup report. -func (n *ExecNode) waitForStartupJSON(ctx context.Context) (string, chan nodeStartupJSON) { - var ( - ch = make(chan nodeStartupJSON, 1) - quitOnce sync.Once - srv http.Server - ) - l, err := net.Listen("tcp", "127.0.0.1:0") - if err != nil { - ch <- nodeStartupJSON{Err: err.Error()} - return "", ch - } - quit := func(status nodeStartupJSON) { - quitOnce.Do(func() { - l.Close() - ch <- status - }) - } - srv.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { - var status nodeStartupJSON - if err := json.NewDecoder(r.Body).Decode(&status); err != nil { - status.Err = fmt.Sprintf("can't decode startup report: %v", err) - } - quit(status) - }) - // Run the HTTP server, but don't wait forever and shut it down - // if the context is canceled. - go srv.Serve(l) - go func() { - <-ctx.Done() - quit(nodeStartupJSON{Err: "didn't get startup report"}) - }() - - url := "http://" + l.Addr().String() - return url, ch -} - -// execCommand returns a command which runs the node locally by exec'ing -// the current binary but setting argv[0] to "p2p-node" so that the child -// runs execP2PNode -func (n *ExecNode) execCommand() *exec.Cmd { - return &exec.Cmd{ - Path: reexec.Self(), - Args: []string{"p2p-node", strings.Join(n.Config.Node.Lifecycles, ","), n.ID.String()}, - } -} - -// Stop stops the node by first sending SIGTERM and then SIGKILL if the node -// doesn't stop within 5s -func (n *ExecNode) Stop() error { - if n.Cmd == nil { - return nil - } - defer func() { - n.Cmd = nil - }() - - if n.client != nil { - n.client.Close() - n.client = nil - n.wsAddr = "" - n.Info = nil - } - - if err := n.Cmd.Process.Signal(syscall.SIGTERM); err != nil { - return n.Cmd.Process.Kill() - } - waitErr := make(chan error, 1) - go func() { - waitErr <- n.Cmd.Wait() - }() - timer := time.NewTimer(5 * time.Second) - defer timer.Stop() - - select { - case err := <-waitErr: - return err - case <-timer.C: - return n.Cmd.Process.Kill() - } -} - -// NodeInfo returns information about the node -func (n *ExecNode) NodeInfo() *p2p.NodeInfo { - info := &p2p.NodeInfo{ - ID: n.ID.String(), - } - if n.client != nil { - n.client.Call(&info, "admin_nodeInfo") - } - return info -} - -// ServeRPC serves RPC requests over the given connection by dialling the -// node's WebSocket address and joining the two connections -func (n *ExecNode) ServeRPC(clientConn *websocket.Conn) error { - conn, _, err := websocket.DefaultDialer.Dial(n.wsAddr, nil) - if err != nil { - return err - } - var wg sync.WaitGroup - wg.Add(2) - go wsCopy(&wg, conn, clientConn) - go wsCopy(&wg, clientConn, conn) - wg.Wait() - conn.Close() - return nil -} - -func wsCopy(wg *sync.WaitGroup, src, dst *websocket.Conn) { - defer wg.Done() - for { - msgType, r, err := src.NextReader() - if err != nil { - return - } - w, err := dst.NextWriter(msgType) - if err != nil { - return - } - if _, err = io.Copy(w, r); err != nil { - return - } - } -} - -// Snapshots creates snapshots of the services by calling the -// simulation_snapshot RPC method -func (n *ExecNode) Snapshots() (map[string][]byte, error) { - if n.client == nil { - return nil, errors.New("RPC not started") - } - var snapshots map[string][]byte - return snapshots, n.client.Call(&snapshots, "simulation_snapshot") -} - -// execNodeConfig is used to serialize the node configuration so it can be -// passed to the child process as a JSON encoded environment variable -type execNodeConfig struct { - Stack node.Config `json:"stack"` - Node *NodeConfig `json:"node"` - Snapshots map[string][]byte `json:"snapshots,omitempty"` - PeerAddrs map[string]string `json:"peer_addrs,omitempty"` -} - -func initLogging() { - // Initialize the logging by default first. - var innerHandler slog.Handler - innerHandler = slog.NewTextHandler(os.Stderr, nil) - glogger := log.NewGlogHandler(innerHandler) - glogger.Verbosity(log.LevelInfo) - log.SetDefault(log.NewLogger(glogger)) - - confEnv := os.Getenv(envNodeConfig) - if confEnv == "" { - return - } - var conf execNodeConfig - if err := json.Unmarshal([]byte(confEnv), &conf); err != nil { - return - } - var writer = os.Stderr - if conf.Node.LogFile != "" { - logWriter, err := os.Create(conf.Node.LogFile) - if err != nil { - return - } - writer = logWriter - } - var verbosity = log.LevelInfo - if conf.Node.LogVerbosity <= log.LevelTrace && conf.Node.LogVerbosity >= log.LevelCrit { - verbosity = log.FromLegacyLevel(int(conf.Node.LogVerbosity)) - } - // Reinitialize the logger - innerHandler = log.NewTerminalHandler(writer, true) - glogger = log.NewGlogHandler(innerHandler) - glogger.Verbosity(verbosity) - log.SetDefault(log.NewLogger(glogger)) -} - -// execP2PNode starts a simulation node when the current binary is executed with -// argv[0] being "p2p-node", reading the service / ID from argv[1] / argv[2] -// and the node config from an environment variable. -func execP2PNode() { - initLogging() - - statusURL := os.Getenv(envStatusURL) - if statusURL == "" { - log.Crit("missing " + envStatusURL) - } - - // Start the node and gather startup report. - var status nodeStartupJSON - stack, stackErr := startExecNodeStack() - if stackErr != nil { - status.Err = stackErr.Error() - } else { - status.WSEndpoint = stack.WSEndpoint() - status.NodeInfo = stack.Server().NodeInfo() - } - - // Send status to the host. - statusJSON, _ := json.Marshal(status) - resp, err := http.Post(statusURL, "application/json", bytes.NewReader(statusJSON)) - if err != nil { - log.Crit("Can't post startup info", "url", statusURL, "err", err) - } - resp.Body.Close() - if stackErr != nil { - os.Exit(1) - } - - // Stop the stack if we get a SIGTERM signal. - go func() { - sigc := make(chan os.Signal, 1) - signal.Notify(sigc, syscall.SIGTERM) - defer signal.Stop(sigc) - <-sigc - log.Info("Received SIGTERM, shutting down...") - stack.Close() - }() - stack.Wait() // Wait for the stack to exit. -} - -func startExecNodeStack() (*node.Node, error) { - // read the services from argv - serviceNames := strings.Split(os.Args[1], ",") - - // decode the config - confEnv := os.Getenv(envNodeConfig) - if confEnv == "" { - return nil, errors.New("missing " + envNodeConfig) - } - var conf execNodeConfig - if err := json.Unmarshal([]byte(confEnv), &conf); err != nil { - return nil, fmt.Errorf("error decoding %s: %v", envNodeConfig, err) - } - - // create enode record - nodeTcpConn, _ := net.ResolveTCPAddr("tcp", conf.Stack.P2P.ListenAddr) - if nodeTcpConn.IP == nil { - nodeTcpConn.IP = net.IPv4(127, 0, 0, 1) - } - conf.Node.initEnode(nodeTcpConn.IP, nodeTcpConn.Port, nodeTcpConn.Port) - conf.Stack.P2P.PrivateKey = conf.Node.PrivateKey - conf.Stack.Logger = log.New("node.id", conf.Node.ID.String()) - - // initialize the devp2p stack - stack, err := node.New(&conf.Stack) - if err != nil { - return nil, fmt.Errorf("error creating node stack: %v", err) - } - - // Register the services, collecting them into a map so they can - // be accessed by the snapshot API. - services := make(map[string]node.Lifecycle, len(serviceNames)) - for _, name := range serviceNames { - lifecycleFunc, exists := lifecycleConstructorFuncs[name] - if !exists { - return nil, fmt.Errorf("unknown node service %q", err) - } - ctx := &ServiceContext{ - RPCDialer: &wsRPCDialer{addrs: conf.PeerAddrs}, - Config: conf.Node, - } - if conf.Snapshots != nil { - ctx.Snapshot = conf.Snapshots[name] - } - service, err := lifecycleFunc(ctx, stack) - if err != nil { - return nil, err - } - services[name] = service - } - - // Add the snapshot API. - stack.RegisterAPIs([]rpc.API{{ - Namespace: "simulation", - Service: SnapshotAPI{services}, - }}) - - if err = stack.Start(); err != nil { - err = fmt.Errorf("error starting stack: %v", err) - } - return stack, err -} - -const ( - envStatusURL = "_P2P_STATUS_URL" - envNodeConfig = "_P2P_NODE_CONFIG" -) - -// nodeStartupJSON is sent to the simulation host after startup. -type nodeStartupJSON struct { - Err string - WSEndpoint string - NodeInfo *p2p.NodeInfo -} - -// SnapshotAPI provides an RPC method to create snapshots of services -type SnapshotAPI struct { - services map[string]node.Lifecycle -} - -func (api SnapshotAPI) Snapshot() (map[string][]byte, error) { - snapshots := make(map[string][]byte) - for name, service := range api.services { - if s, ok := service.(interface { - Snapshot() ([]byte, error) - }); ok { - snap, err := s.Snapshot() - if err != nil { - return nil, err - } - snapshots[name] = snap - } - } - return snapshots, nil -} - -type wsRPCDialer struct { - addrs map[string]string -} - -// DialRPC implements the RPCDialer interface by creating a WebSocket RPC -// client of the given node -func (w *wsRPCDialer) DialRPC(id enode.ID) (*rpc.Client, error) { - addr, ok := w.addrs[id.String()] - if !ok { - return nil, fmt.Errorf("unknown node: %s", id) - } - return rpc.DialWebsocket(context.Background(), addr, "http://localhost") -} diff --git a/p2p/simulations/adapters/inproc.go b/p2p/simulations/adapters/inproc.go deleted file mode 100644 index 0efe9744a5..0000000000 --- a/p2p/simulations/adapters/inproc.go +++ /dev/null @@ -1,344 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package adapters - -import ( - "context" - "errors" - "fmt" - "maps" - "math" - "net" - "sync" - - "github.com/ethereum/go-ethereum/event" - "github.com/ethereum/go-ethereum/log" - "github.com/ethereum/go-ethereum/node" - "github.com/ethereum/go-ethereum/p2p" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/simulations/pipes" - "github.com/ethereum/go-ethereum/rpc" - "github.com/gorilla/websocket" -) - -// SimAdapter is a NodeAdapter which creates in-memory simulation nodes and -// connects them using net.Pipe -type SimAdapter struct { - pipe func() (net.Conn, net.Conn, error) - mtx sync.RWMutex - nodes map[enode.ID]*SimNode - lifecycles LifecycleConstructors -} - -// NewSimAdapter creates a SimAdapter which is capable of running in-memory -// simulation nodes running any of the given services (the services to run on a -// particular node are passed to the NewNode function in the NodeConfig) -// the adapter uses a net.Pipe for in-memory simulated network connections -func NewSimAdapter(services LifecycleConstructors) *SimAdapter { - return &SimAdapter{ - pipe: pipes.NetPipe, - nodes: make(map[enode.ID]*SimNode), - lifecycles: services, - } -} - -// Name returns the name of the adapter for logging purposes -func (s *SimAdapter) Name() string { - return "sim-adapter" -} - -// NewNode returns a new SimNode using the given config -func (s *SimAdapter) NewNode(config *NodeConfig) (Node, error) { - s.mtx.Lock() - defer s.mtx.Unlock() - - id := config.ID - // verify that the node has a private key in the config - if config.PrivateKey == nil { - return nil, fmt.Errorf("node is missing private key: %s", id) - } - - // check a node with the ID doesn't already exist - if _, exists := s.nodes[id]; exists { - return nil, fmt.Errorf("node already exists: %s", id) - } - - // check the services are valid - if len(config.Lifecycles) == 0 { - return nil, errors.New("node must have at least one service") - } - for _, service := range config.Lifecycles { - if _, exists := s.lifecycles[service]; !exists { - return nil, fmt.Errorf("unknown node service %q", service) - } - } - - err := config.initDummyEnode() - if err != nil { - return nil, err - } - - n, err := node.New(&node.Config{ - P2P: p2p.Config{ - PrivateKey: config.PrivateKey, - MaxPeers: math.MaxInt32, - NoDiscovery: true, - Dialer: s, - EnableMsgEvents: config.EnableMsgEvents, - }, - ExternalSigner: config.ExternalSigner, - Logger: log.New("node.id", id.String()), - }) - if err != nil { - return nil, err - } - - simNode := &SimNode{ - ID: id, - config: config, - node: n, - adapter: s, - running: make(map[string]node.Lifecycle), - } - s.nodes[id] = simNode - return simNode, nil -} - -// Dial implements the p2p.NodeDialer interface by connecting to the node using -// an in-memory net.Pipe -func (s *SimAdapter) Dial(ctx context.Context, dest *enode.Node) (conn net.Conn, err error) { - node, ok := s.GetNode(dest.ID()) - if !ok { - return nil, fmt.Errorf("unknown node: %s", dest.ID()) - } - srv := node.Server() - if srv == nil { - return nil, fmt.Errorf("node not running: %s", dest.ID()) - } - // SimAdapter.pipe is net.Pipe (NewSimAdapter) - pipe1, pipe2, err := s.pipe() - if err != nil { - return nil, err - } - // this is simulated 'listening' - // asynchronously call the dialed destination node's p2p server - // to set up connection on the 'listening' side - go srv.SetupConn(pipe1, 0, nil) - return pipe2, nil -} - -// DialRPC implements the RPCDialer interface by creating an in-memory RPC -// client of the given node -func (s *SimAdapter) DialRPC(id enode.ID) (*rpc.Client, error) { - node, ok := s.GetNode(id) - if !ok { - return nil, fmt.Errorf("unknown node: %s", id) - } - return node.node.Attach(), nil -} - -// GetNode returns the node with the given ID if it exists -func (s *SimAdapter) GetNode(id enode.ID) (*SimNode, bool) { - s.mtx.RLock() - defer s.mtx.RUnlock() - node, ok := s.nodes[id] - return node, ok -} - -// SimNode is an in-memory simulation node which connects to other nodes using -// net.Pipe (see SimAdapter.Dial), running devp2p protocols directly over that -// pipe -type SimNode struct { - lock sync.RWMutex - ID enode.ID - config *NodeConfig - adapter *SimAdapter - node *node.Node - running map[string]node.Lifecycle - client *rpc.Client - registerOnce sync.Once -} - -// Close closes the underlying node.Node to release -// acquired resources. -func (sn *SimNode) Close() error { - return sn.node.Close() -} - -// Addr returns the node's discovery address -func (sn *SimNode) Addr() []byte { - return []byte(sn.Node().String()) -} - -// Node returns a node descriptor representing the SimNode -func (sn *SimNode) Node() *enode.Node { - return sn.config.Node() -} - -// Client returns an rpc.Client which can be used to communicate with the -// underlying services (it is set once the node has started) -func (sn *SimNode) Client() (*rpc.Client, error) { - sn.lock.RLock() - defer sn.lock.RUnlock() - if sn.client == nil { - return nil, errors.New("node not started") - } - return sn.client, nil -} - -// ServeRPC serves RPC requests over the given connection by creating an -// in-memory client to the node's RPC server. -func (sn *SimNode) ServeRPC(conn *websocket.Conn) error { - handler, err := sn.node.RPCHandler() - if err != nil { - return err - } - codec := rpc.NewFuncCodec(conn, func(v any, _ bool) error { return conn.WriteJSON(v) }, conn.ReadJSON) - handler.ServeCodec(codec, 0) - return nil -} - -// Snapshots creates snapshots of the services by calling the -// simulation_snapshot RPC method -func (sn *SimNode) Snapshots() (map[string][]byte, error) { - sn.lock.RLock() - services := maps.Clone(sn.running) - sn.lock.RUnlock() - if len(services) == 0 { - return nil, errors.New("no running services") - } - snapshots := make(map[string][]byte) - for name, service := range services { - if s, ok := service.(interface { - Snapshot() ([]byte, error) - }); ok { - snap, err := s.Snapshot() - if err != nil { - return nil, err - } - snapshots[name] = snap - } - } - return snapshots, nil -} - -// Start registers the services and starts the underlying devp2p node -func (sn *SimNode) Start(snapshots map[string][]byte) error { - // ensure we only register the services once in the case of the node - // being stopped and then started again - var regErr error - sn.registerOnce.Do(func() { - for _, name := range sn.config.Lifecycles { - ctx := &ServiceContext{ - RPCDialer: sn.adapter, - Config: sn.config, - } - if snapshots != nil { - ctx.Snapshot = snapshots[name] - } - serviceFunc := sn.adapter.lifecycles[name] - service, err := serviceFunc(ctx, sn.node) - if err != nil { - regErr = err - break - } - // if the service has already been registered, don't register it again. - if _, ok := sn.running[name]; ok { - continue - } - sn.running[name] = service - } - }) - if regErr != nil { - return regErr - } - - if err := sn.node.Start(); err != nil { - return err - } - - // create an in-process RPC client - client := sn.node.Attach() - sn.lock.Lock() - sn.client = client - sn.lock.Unlock() - - return nil -} - -// Stop closes the RPC client and stops the underlying devp2p node -func (sn *SimNode) Stop() error { - sn.lock.Lock() - if sn.client != nil { - sn.client.Close() - sn.client = nil - } - sn.lock.Unlock() - return sn.node.Close() -} - -// Service returns a running service by name -func (sn *SimNode) Service(name string) node.Lifecycle { - sn.lock.RLock() - defer sn.lock.RUnlock() - return sn.running[name] -} - -// Services returns a copy of the underlying services -func (sn *SimNode) Services() []node.Lifecycle { - sn.lock.RLock() - defer sn.lock.RUnlock() - services := make([]node.Lifecycle, 0, len(sn.running)) - for _, service := range sn.running { - services = append(services, service) - } - return services -} - -// ServiceMap returns a map by names of the underlying services -func (sn *SimNode) ServiceMap() map[string]node.Lifecycle { - sn.lock.RLock() - defer sn.lock.RUnlock() - return maps.Clone(sn.running) -} - -// Server returns the underlying p2p.Server -func (sn *SimNode) Server() *p2p.Server { - return sn.node.Server() -} - -// SubscribeEvents subscribes the given channel to peer events from the -// underlying p2p.Server -func (sn *SimNode) SubscribeEvents(ch chan *p2p.PeerEvent) event.Subscription { - srv := sn.Server() - if srv == nil { - panic("node not running") - } - return srv.SubscribeEvents(ch) -} - -// NodeInfo returns information about the node -func (sn *SimNode) NodeInfo() *p2p.NodeInfo { - server := sn.Server() - if server == nil { - return &p2p.NodeInfo{ - ID: sn.ID.String(), - Enode: sn.Node().String(), - } - } - return server.NodeInfo() -} diff --git a/p2p/simulations/adapters/inproc_test.go b/p2p/simulations/adapters/inproc_test.go deleted file mode 100644 index d0539ca867..0000000000 --- a/p2p/simulations/adapters/inproc_test.go +++ /dev/null @@ -1,202 +0,0 @@ -// Copyright 2018 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package adapters - -import ( - "bytes" - "encoding/binary" - "fmt" - "sync" - "testing" - - "github.com/ethereum/go-ethereum/p2p/simulations/pipes" -) - -func TestTCPPipe(t *testing.T) { - c1, c2, err := pipes.TCPPipe() - if err != nil { - t.Fatal(err) - } - - msgs := 50 - size := 1024 - for i := 0; i < msgs; i++ { - msg := make([]byte, size) - binary.PutUvarint(msg, uint64(i)) - if _, err := c1.Write(msg); err != nil { - t.Fatal(err) - } - } - - for i := 0; i < msgs; i++ { - msg := make([]byte, size) - binary.PutUvarint(msg, uint64(i)) - out := make([]byte, size) - if _, err := c2.Read(out); err != nil { - t.Fatal(err) - } - if !bytes.Equal(msg, out) { - t.Fatalf("expected %#v, got %#v", msg, out) - } - } -} - -func TestTCPPipeBidirections(t *testing.T) { - c1, c2, err := pipes.TCPPipe() - if err != nil { - t.Fatal(err) - } - - msgs := 50 - size := 7 - for i := 0; i < msgs; i++ { - msg := []byte(fmt.Sprintf("ping %02d", i)) - if _, err := c1.Write(msg); err != nil { - t.Fatal(err) - } - } - - for i := 0; i < msgs; i++ { - expected := []byte(fmt.Sprintf("ping %02d", i)) - out := make([]byte, size) - if _, err := c2.Read(out); err != nil { - t.Fatal(err) - } - - if !bytes.Equal(expected, out) { - t.Fatalf("expected %#v, got %#v", expected, out) - } else { - msg := []byte(fmt.Sprintf("pong %02d", i)) - if _, err := c2.Write(msg); err != nil { - t.Fatal(err) - } - } - } - - for i := 0; i < msgs; i++ { - expected := []byte(fmt.Sprintf("pong %02d", i)) - out := make([]byte, size) - if _, err := c1.Read(out); err != nil { - t.Fatal(err) - } - if !bytes.Equal(expected, out) { - t.Fatalf("expected %#v, got %#v", expected, out) - } - } -} - -func TestNetPipe(t *testing.T) { - c1, c2, err := pipes.NetPipe() - if err != nil { - t.Fatal(err) - } - - msgs := 50 - size := 1024 - var wg sync.WaitGroup - defer wg.Wait() - - // netPipe is blocking, so writes are emitted asynchronously - wg.Add(1) - go func() { - defer wg.Done() - - for i := 0; i < msgs; i++ { - msg := make([]byte, size) - binary.PutUvarint(msg, uint64(i)) - if _, err := c1.Write(msg); err != nil { - t.Error(err) - } - } - }() - - for i := 0; i < msgs; i++ { - msg := make([]byte, size) - binary.PutUvarint(msg, uint64(i)) - out := make([]byte, size) - if _, err := c2.Read(out); err != nil { - t.Error(err) - } - if !bytes.Equal(msg, out) { - t.Errorf("expected %#v, got %#v", msg, out) - } - } -} - -func TestNetPipeBidirections(t *testing.T) { - c1, c2, err := pipes.NetPipe() - if err != nil { - t.Fatal(err) - } - - msgs := 1000 - size := 8 - pingTemplate := "ping %03d" - pongTemplate := "pong %03d" - var wg sync.WaitGroup - defer wg.Wait() - - // netPipe is blocking, so writes are emitted asynchronously - wg.Add(1) - go func() { - defer wg.Done() - - for i := 0; i < msgs; i++ { - msg := []byte(fmt.Sprintf(pingTemplate, i)) - if _, err := c1.Write(msg); err != nil { - t.Error(err) - } - } - }() - - // netPipe is blocking, so reads for pong are emitted asynchronously - wg.Add(1) - go func() { - defer wg.Done() - - for i := 0; i < msgs; i++ { - expected := []byte(fmt.Sprintf(pongTemplate, i)) - out := make([]byte, size) - if _, err := c1.Read(out); err != nil { - t.Error(err) - } - if !bytes.Equal(expected, out) { - t.Errorf("expected %#v, got %#v", expected, out) - } - } - }() - - // expect to read pings, and respond with pongs to the alternate connection - for i := 0; i < msgs; i++ { - expected := []byte(fmt.Sprintf(pingTemplate, i)) - - out := make([]byte, size) - _, err := c2.Read(out) - if err != nil { - t.Fatal(err) - } - - if !bytes.Equal(expected, out) { - t.Errorf("expected %#v, got %#v", expected, out) - } else { - msg := []byte(fmt.Sprintf(pongTemplate, i)) - if _, err := c2.Write(msg); err != nil { - t.Fatal(err) - } - } - } -} diff --git a/p2p/simulations/adapters/types.go b/p2p/simulations/adapters/types.go deleted file mode 100644 index e18aaacc33..0000000000 --- a/p2p/simulations/adapters/types.go +++ /dev/null @@ -1,325 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package adapters - -import ( - "crypto/ecdsa" - "encoding/hex" - "encoding/json" - "fmt" - "log/slog" - "net" - "os" - "strconv" - - "github.com/ethereum/go-ethereum/crypto" - "github.com/ethereum/go-ethereum/internal/reexec" - "github.com/ethereum/go-ethereum/log" - "github.com/ethereum/go-ethereum/node" - "github.com/ethereum/go-ethereum/p2p" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/enr" - "github.com/ethereum/go-ethereum/rpc" - "github.com/gorilla/websocket" -) - -// Node represents a node in a simulation network which is created by a -// NodeAdapter, for example: -// -// - SimNode, an in-memory node in the same process -// - ExecNode, a child process node -type Node interface { - // Addr returns the node's address (e.g. an Enode URL) - Addr() []byte - - // Client returns the RPC client which is created once the node is - // up and running - Client() (*rpc.Client, error) - - // ServeRPC serves RPC requests over the given connection - ServeRPC(*websocket.Conn) error - - // Start starts the node with the given snapshots - Start(snapshots map[string][]byte) error - - // Stop stops the node - Stop() error - - // NodeInfo returns information about the node - NodeInfo() *p2p.NodeInfo - - // Snapshots creates snapshots of the running services - Snapshots() (map[string][]byte, error) -} - -// NodeAdapter is used to create Nodes in a simulation network -type NodeAdapter interface { - // Name returns the name of the adapter for logging purposes - Name() string - - // NewNode creates a new node with the given configuration - NewNode(config *NodeConfig) (Node, error) -} - -// NodeConfig is the configuration used to start a node in a simulation -// network -type NodeConfig struct { - // ID is the node's ID which is used to identify the node in the - // simulation network - ID enode.ID - - // PrivateKey is the node's private key which is used by the devp2p - // stack to encrypt communications - PrivateKey *ecdsa.PrivateKey - - // Enable peer events for Msgs - EnableMsgEvents bool - - // Name is a human friendly name for the node like "node01" - Name string - - // Use an existing database instead of a temporary one if non-empty - DataDir string - - // Lifecycles are the names of the service lifecycles which should be run when - // starting the node (for SimNodes it should be the names of service lifecycles - // contained in SimAdapter.lifecycles, for other nodes it should be - // service lifecycles registered by calling the RegisterLifecycle function) - Lifecycles []string - - // Properties are the names of the properties this node should hold - // within running services (e.g. "bootnode", "lightnode" or any custom values) - // These values need to be checked and acted upon by node Services - Properties []string - - // ExternalSigner specifies an external URI for a clef-type signer - ExternalSigner string - - // Enode - node *enode.Node - - // ENR Record with entries to overwrite - Record enr.Record - - // function to sanction or prevent suggesting a peer - Reachable func(id enode.ID) bool - - Port uint16 - - // LogFile is the log file name of the p2p node at runtime. - // - // The default value is empty so that the default log writer - // is the system standard output. - LogFile string - - // LogVerbosity is the log verbosity of the p2p node at runtime. - // - // The default verbosity is INFO. - LogVerbosity slog.Level -} - -// nodeConfigJSON is used to encode and decode NodeConfig as JSON by encoding -// all fields as strings -type nodeConfigJSON struct { - ID string `json:"id"` - PrivateKey string `json:"private_key"` - Name string `json:"name"` - Lifecycles []string `json:"lifecycles"` - Properties []string `json:"properties"` - EnableMsgEvents bool `json:"enable_msg_events"` - Port uint16 `json:"port"` - LogFile string `json:"logfile"` - LogVerbosity int `json:"log_verbosity"` -} - -// MarshalJSON implements the json.Marshaler interface by encoding the config -// fields as strings -func (n *NodeConfig) MarshalJSON() ([]byte, error) { - confJSON := nodeConfigJSON{ - ID: n.ID.String(), - Name: n.Name, - Lifecycles: n.Lifecycles, - Properties: n.Properties, - Port: n.Port, - EnableMsgEvents: n.EnableMsgEvents, - LogFile: n.LogFile, - LogVerbosity: int(n.LogVerbosity), - } - if n.PrivateKey != nil { - confJSON.PrivateKey = hex.EncodeToString(crypto.FromECDSA(n.PrivateKey)) - } - return json.Marshal(confJSON) -} - -// UnmarshalJSON implements the json.Unmarshaler interface by decoding the json -// string values into the config fields -func (n *NodeConfig) UnmarshalJSON(data []byte) error { - var confJSON nodeConfigJSON - if err := json.Unmarshal(data, &confJSON); err != nil { - return err - } - - if confJSON.ID != "" { - if err := n.ID.UnmarshalText([]byte(confJSON.ID)); err != nil { - return err - } - } - - if confJSON.PrivateKey != "" { - key, err := hex.DecodeString(confJSON.PrivateKey) - if err != nil { - return err - } - privKey, err := crypto.ToECDSA(key) - if err != nil { - return err - } - n.PrivateKey = privKey - } - - n.Name = confJSON.Name - n.Lifecycles = confJSON.Lifecycles - n.Properties = confJSON.Properties - n.Port = confJSON.Port - n.EnableMsgEvents = confJSON.EnableMsgEvents - n.LogFile = confJSON.LogFile - n.LogVerbosity = slog.Level(confJSON.LogVerbosity) - - return nil -} - -// Node returns the node descriptor represented by the config. -func (n *NodeConfig) Node() *enode.Node { - return n.node -} - -// RandomNodeConfig returns node configuration with a randomly generated ID and -// PrivateKey -func RandomNodeConfig() *NodeConfig { - prvkey, err := crypto.GenerateKey() - if err != nil { - panic("unable to generate key") - } - - port, err := assignTCPPort() - if err != nil { - panic("unable to assign tcp port") - } - - enodId := enode.PubkeyToIDV4(&prvkey.PublicKey) - return &NodeConfig{ - PrivateKey: prvkey, - ID: enodId, - Name: fmt.Sprintf("node_%s", enodId.String()), - Port: port, - EnableMsgEvents: true, - LogVerbosity: log.LvlInfo, - } -} - -func assignTCPPort() (uint16, error) { - l, err := net.Listen("tcp", "127.0.0.1:0") - if err != nil { - return 0, err - } - l.Close() - _, port, err := net.SplitHostPort(l.Addr().String()) - if err != nil { - return 0, err - } - p, err := strconv.ParseUint(port, 10, 16) - if err != nil { - return 0, err - } - return uint16(p), nil -} - -// ServiceContext is a collection of options and methods which can be utilised -// when starting services -type ServiceContext struct { - RPCDialer - - Config *NodeConfig - Snapshot []byte -} - -// RPCDialer is used when initialising services which need to connect to -// other nodes in the network (for example a simulated Swarm node which needs -// to connect to a Geth node to resolve ENS names) -type RPCDialer interface { - DialRPC(id enode.ID) (*rpc.Client, error) -} - -// LifecycleConstructor allows a Lifecycle to be constructed during node start-up. -// While the service-specific package usually takes care of Lifecycle creation and registration, -// for testing purposes, it is useful to be able to construct a Lifecycle on spot. -type LifecycleConstructor func(ctx *ServiceContext, stack *node.Node) (node.Lifecycle, error) - -// LifecycleConstructors stores LifecycleConstructor functions to call during node start-up. -type LifecycleConstructors map[string]LifecycleConstructor - -// lifecycleConstructorFuncs is a map of registered services which are used to boot devp2p -// nodes -var lifecycleConstructorFuncs = make(LifecycleConstructors) - -// RegisterLifecycles registers the given Services which can then be used to -// start devp2p nodes using either the Exec or Docker adapters. -// -// It should be called in an init function so that it has the opportunity to -// execute the services before main() is called. -func RegisterLifecycles(lifecycles LifecycleConstructors) { - for name, f := range lifecycles { - if _, exists := lifecycleConstructorFuncs[name]; exists { - panic(fmt.Sprintf("node service already exists: %q", name)) - } - lifecycleConstructorFuncs[name] = f - } - - // now we have registered the services, run reexec.Init() which will - // potentially start one of the services if the current binary has - // been exec'd with argv[0] set to "p2p-node" - if reexec.Init() { - os.Exit(0) - } -} - -// adds the host part to the configuration's ENR, signs it -// creates and adds the corresponding enode object to the configuration -func (n *NodeConfig) initEnode(ip net.IP, tcpport int, udpport int) error { - enrIp := enr.IP(ip) - n.Record.Set(&enrIp) - enrTcpPort := enr.TCP(tcpport) - n.Record.Set(&enrTcpPort) - enrUdpPort := enr.UDP(udpport) - n.Record.Set(&enrUdpPort) - - err := enode.SignV4(&n.Record, n.PrivateKey) - if err != nil { - return fmt.Errorf("unable to generate ENR: %v", err) - } - nod, err := enode.New(enode.V4ID{}, &n.Record) - if err != nil { - return fmt.Errorf("unable to create enode: %v", err) - } - log.Trace("simnode new", "record", n.Record) - n.node = nod - return nil -} - -func (n *NodeConfig) initDummyEnode() error { - return n.initEnode(net.IPv4(127, 0, 0, 1), int(n.Port), 0) -} diff --git a/p2p/simulations/connect.go b/p2p/simulations/connect.go deleted file mode 100644 index ede96b34c1..0000000000 --- a/p2p/simulations/connect.go +++ /dev/null @@ -1,153 +0,0 @@ -// Copyright 2018 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package simulations - -import ( - "errors" - "strings" - - "github.com/ethereum/go-ethereum/p2p/enode" -) - -var ( - ErrNodeNotFound = errors.New("node not found") -) - -// ConnectToLastNode connects the node with provided NodeID -// to the last node that is up, and avoiding connection to self. -// It is useful when constructing a chain network topology -// when Network adds and removes nodes dynamically. -func (net *Network) ConnectToLastNode(id enode.ID) (err error) { - net.lock.Lock() - defer net.lock.Unlock() - - ids := net.getUpNodeIDs() - l := len(ids) - if l < 2 { - return nil - } - last := ids[l-1] - if last == id { - last = ids[l-2] - } - return net.connectNotConnected(last, id) -} - -// ConnectToRandomNode connects the node with provided NodeID -// to a random node that is up. -func (net *Network) ConnectToRandomNode(id enode.ID) (err error) { - net.lock.Lock() - defer net.lock.Unlock() - - selected := net.getRandomUpNode(id) - if selected == nil { - return ErrNodeNotFound - } - return net.connectNotConnected(selected.ID(), id) -} - -// ConnectNodesFull connects all nodes one to another. -// It provides a complete connectivity in the network -// which should be rarely needed. -func (net *Network) ConnectNodesFull(ids []enode.ID) (err error) { - net.lock.Lock() - defer net.lock.Unlock() - - if ids == nil { - ids = net.getUpNodeIDs() - } - for i, lid := range ids { - for _, rid := range ids[i+1:] { - if err = net.connectNotConnected(lid, rid); err != nil { - return err - } - } - } - return nil -} - -// ConnectNodesChain connects all nodes in a chain topology. -// If ids argument is nil, all nodes that are up will be connected. -func (net *Network) ConnectNodesChain(ids []enode.ID) (err error) { - net.lock.Lock() - defer net.lock.Unlock() - - return net.connectNodesChain(ids) -} - -func (net *Network) connectNodesChain(ids []enode.ID) (err error) { - if ids == nil { - ids = net.getUpNodeIDs() - } - l := len(ids) - for i := 0; i < l-1; i++ { - if err := net.connectNotConnected(ids[i], ids[i+1]); err != nil { - return err - } - } - return nil -} - -// ConnectNodesRing connects all nodes in a ring topology. -// If ids argument is nil, all nodes that are up will be connected. -func (net *Network) ConnectNodesRing(ids []enode.ID) (err error) { - net.lock.Lock() - defer net.lock.Unlock() - - if ids == nil { - ids = net.getUpNodeIDs() - } - l := len(ids) - if l < 2 { - return nil - } - if err := net.connectNodesChain(ids); err != nil { - return err - } - return net.connectNotConnected(ids[l-1], ids[0]) -} - -// ConnectNodesStar connects all nodes into a star topology -// If ids argument is nil, all nodes that are up will be connected. -func (net *Network) ConnectNodesStar(ids []enode.ID, center enode.ID) (err error) { - net.lock.Lock() - defer net.lock.Unlock() - - if ids == nil { - ids = net.getUpNodeIDs() - } - for _, id := range ids { - if center == id { - continue - } - if err := net.connectNotConnected(center, id); err != nil { - return err - } - } - return nil -} - -func (net *Network) connectNotConnected(oneID, otherID enode.ID) error { - return ignoreAlreadyConnectedErr(net.connect(oneID, otherID)) -} - -func ignoreAlreadyConnectedErr(err error) error { - if err == nil || strings.Contains(err.Error(), "already connected") { - return nil - } - return err -} diff --git a/p2p/simulations/connect_test.go b/p2p/simulations/connect_test.go deleted file mode 100644 index 0154a18b03..0000000000 --- a/p2p/simulations/connect_test.go +++ /dev/null @@ -1,172 +0,0 @@ -// Copyright 2018 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package simulations - -import ( - "testing" - - "github.com/ethereum/go-ethereum/node" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/simulations/adapters" -) - -func newTestNetwork(t *testing.T, nodeCount int) (*Network, []enode.ID) { - t.Helper() - adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "noopwoop": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) { - return NewNoopService(nil), nil - }, - }) - - // create network - network := NewNetwork(adapter, &NetworkConfig{ - DefaultService: "noopwoop", - }) - - // create and start nodes - ids := make([]enode.ID, nodeCount) - for i := range ids { - conf := adapters.RandomNodeConfig() - node, err := network.NewNodeWithConfig(conf) - if err != nil { - t.Fatalf("error creating node: %s", err) - } - if err := network.Start(node.ID()); err != nil { - t.Fatalf("error starting node: %s", err) - } - ids[i] = node.ID() - } - - if len(network.Conns) > 0 { - t.Fatal("no connections should exist after just adding nodes") - } - - return network, ids -} - -func TestConnectToLastNode(t *testing.T) { - net, ids := newTestNetwork(t, 10) - defer net.Shutdown() - - first := ids[0] - if err := net.ConnectToLastNode(first); err != nil { - t.Fatal(err) - } - - last := ids[len(ids)-1] - for i, id := range ids { - if id == first || id == last { - continue - } - - if net.GetConn(first, id) != nil { - t.Errorf("connection must not exist with node(ind: %v, id: %v)", i, id) - } - } - - if net.GetConn(first, last) == nil { - t.Error("first and last node must be connected") - } -} - -func TestConnectToRandomNode(t *testing.T) { - net, ids := newTestNetwork(t, 10) - defer net.Shutdown() - - err := net.ConnectToRandomNode(ids[0]) - if err != nil { - t.Fatal(err) - } - - var cc int - for i, a := range ids { - for _, b := range ids[i:] { - if net.GetConn(a, b) != nil { - cc++ - } - } - } - - if cc != 1 { - t.Errorf("expected one connection, got %v", cc) - } -} - -func TestConnectNodesFull(t *testing.T) { - tests := []struct { - name string - nodeCount int - }{ - {name: "no node", nodeCount: 0}, - {name: "single node", nodeCount: 1}, - {name: "2 nodes", nodeCount: 2}, - {name: "3 nodes", nodeCount: 3}, - {name: "even number of nodes", nodeCount: 12}, - {name: "odd number of nodes", nodeCount: 13}, - } - for _, test := range tests { - t.Run(test.name, func(t *testing.T) { - net, ids := newTestNetwork(t, test.nodeCount) - defer net.Shutdown() - - err := net.ConnectNodesFull(ids) - if err != nil { - t.Fatal(err) - } - - VerifyFull(t, net, ids) - }) - } -} - -func TestConnectNodesChain(t *testing.T) { - net, ids := newTestNetwork(t, 10) - defer net.Shutdown() - - err := net.ConnectNodesChain(ids) - if err != nil { - t.Fatal(err) - } - - VerifyChain(t, net, ids) -} - -func TestConnectNodesRing(t *testing.T) { - net, ids := newTestNetwork(t, 10) - defer net.Shutdown() - - err := net.ConnectNodesRing(ids) - if err != nil { - t.Fatal(err) - } - - VerifyRing(t, net, ids) -} - -func TestConnectNodesStar(t *testing.T) { - net, ids := newTestNetwork(t, 10) - defer net.Shutdown() - - pivotIndex := 2 - - err := net.ConnectNodesStar(ids, ids[pivotIndex]) - if err != nil { - t.Fatal(err) - } - - VerifyStar(t, net, ids, pivotIndex) -} diff --git a/p2p/simulations/events.go b/p2p/simulations/events.go deleted file mode 100644 index 1131185fb9..0000000000 --- a/p2p/simulations/events.go +++ /dev/null @@ -1,110 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package simulations - -import ( - "fmt" - "time" -) - -// EventType is the type of event emitted by a simulation network -type EventType string - -const ( - // EventTypeNode is the type of event emitted when a node is either - // created, started or stopped - EventTypeNode EventType = "node" - - // EventTypeConn is the type of event emitted when a connection is - // either established or dropped between two nodes - EventTypeConn EventType = "conn" - - // EventTypeMsg is the type of event emitted when a p2p message it - // sent between two nodes - EventTypeMsg EventType = "msg" -) - -// Event is an event emitted by a simulation network -type Event struct { - // Type is the type of the event - Type EventType `json:"type"` - - // Time is the time the event happened - Time time.Time `json:"time"` - - // Control indicates whether the event is the result of a controlled - // action in the network - Control bool `json:"control"` - - // Node is set if the type is EventTypeNode - Node *Node `json:"node,omitempty"` - - // Conn is set if the type is EventTypeConn - Conn *Conn `json:"conn,omitempty"` - - // Msg is set if the type is EventTypeMsg - Msg *Msg `json:"msg,omitempty"` - - //Optionally provide data (currently for simulation frontends only) - Data interface{} `json:"data"` -} - -// NewEvent creates a new event for the given object which should be either a -// Node, Conn or Msg. -// -// The object is copied so that the event represents the state of the object -// when NewEvent is called. -func NewEvent(v interface{}) *Event { - event := &Event{Time: time.Now()} - switch v := v.(type) { - case *Node: - event.Type = EventTypeNode - event.Node = v.copy() - case *Conn: - event.Type = EventTypeConn - conn := *v - event.Conn = &conn - case *Msg: - event.Type = EventTypeMsg - msg := *v - event.Msg = &msg - default: - panic(fmt.Sprintf("invalid event type: %T", v)) - } - return event -} - -// ControlEvent creates a new control event -func ControlEvent(v interface{}) *Event { - event := NewEvent(v) - event.Control = true - return event -} - -// String returns the string representation of the event -func (e *Event) String() string { - switch e.Type { - case EventTypeNode: - return fmt.Sprintf(" id: %s up: %t", e.Node.ID().TerminalString(), e.Node.Up()) - case EventTypeConn: - return fmt.Sprintf(" nodes: %s->%s up: %t", e.Conn.One.TerminalString(), e.Conn.Other.TerminalString(), e.Conn.Up) - case EventTypeMsg: - return fmt.Sprintf(" nodes: %s->%s proto: %s, code: %d, received: %t", e.Msg.One.TerminalString(), e.Msg.Other.TerminalString(), e.Msg.Protocol, e.Msg.Code, e.Msg.Received) - default: - return "" - } -} diff --git a/p2p/simulations/examples/README.md b/p2p/simulations/examples/README.md deleted file mode 100644 index 822a48dcb6..0000000000 --- a/p2p/simulations/examples/README.md +++ /dev/null @@ -1,39 +0,0 @@ -# devp2p simulation examples - -## ping-pong - -`ping-pong.go` implements a simulation network which contains nodes running a -simple "ping-pong" protocol where nodes send a ping message to all their -connected peers every 10s and receive pong messages in return. - -To run the simulation, run `go run ping-pong.go` in one terminal to start the -simulation API and `./ping-pong.sh` in another to start and connect the nodes: - -``` -$ go run ping-pong.go -INFO [08-15|13:53:49] using sim adapter -INFO [08-15|13:53:49] starting simulation server on 0.0.0.0:8888... -``` - -``` -$ ./ping-pong.sh ----> 13:58:12 creating 10 nodes -Created node01 -Started node01 -... -Created node10 -Started node10 ----> 13:58:13 connecting node01 to all other nodes -Connected node01 to node02 -... -Connected node01 to node10 ----> 13:58:14 done -``` - -Use the `--adapter` flag to choose the adapter type: - -``` -$ go run ping-pong.go --adapter exec -INFO [08-15|14:01:14] using exec adapter tmpdir=/var/folders/k6/wpsgfg4n23ddbc6f5cnw5qg00000gn/T/p2p-example992833779 -INFO [08-15|14:01:14] starting simulation server on 0.0.0.0:8888... -``` diff --git a/p2p/simulations/examples/ping-pong.go b/p2p/simulations/examples/ping-pong.go deleted file mode 100644 index b0b8f22fdb..0000000000 --- a/p2p/simulations/examples/ping-pong.go +++ /dev/null @@ -1,173 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package main - -import ( - "flag" - "fmt" - "io" - "net/http" - "os" - "sync/atomic" - "time" - - "github.com/ethereum/go-ethereum/log" - "github.com/ethereum/go-ethereum/node" - "github.com/ethereum/go-ethereum/p2p" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/simulations" - "github.com/ethereum/go-ethereum/p2p/simulations/adapters" -) - -var adapterType = flag.String("adapter", "sim", `node adapter to use (one of "sim" or "exec")`) - -// main() starts a simulation network which contains nodes running a simple -// ping-pong protocol -func main() { - flag.Parse() - - // set the log level to Trace - log.SetDefault(log.NewLogger(log.NewTerminalHandlerWithLevel(os.Stderr, log.LevelTrace, false))) - - // register a single ping-pong service - services := map[string]adapters.LifecycleConstructor{ - "ping-pong": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) { - pps := newPingPongService(ctx.Config.ID) - stack.RegisterProtocols(pps.Protocols()) - return pps, nil - }, - } - adapters.RegisterLifecycles(services) - - // create the NodeAdapter - var adapter adapters.NodeAdapter - - switch *adapterType { - - case "sim": - log.Info("using sim adapter") - adapter = adapters.NewSimAdapter(services) - - case "exec": - tmpdir, err := os.MkdirTemp("", "p2p-example") - if err != nil { - log.Crit("error creating temp dir", "err", err) - } - defer os.RemoveAll(tmpdir) - log.Info("using exec adapter", "tmpdir", tmpdir) - adapter = adapters.NewExecAdapter(tmpdir) - - default: - log.Crit(fmt.Sprintf("unknown node adapter %q", *adapterType)) - } - - // start the HTTP API - log.Info("starting simulation server on 0.0.0.0:8888...") - network := simulations.NewNetwork(adapter, &simulations.NetworkConfig{ - DefaultService: "ping-pong", - }) - if err := http.ListenAndServe(":8888", simulations.NewServer(network)); err != nil { - log.Crit("error starting simulation server", "err", err) - } -} - -// pingPongService runs a ping-pong protocol between nodes where each node -// sends a ping to all its connected peers every 10s and receives a pong in -// return -type pingPongService struct { - id enode.ID - log log.Logger - received atomic.Int64 -} - -func newPingPongService(id enode.ID) *pingPongService { - return &pingPongService{ - id: id, - log: log.New("node.id", id), - } -} - -func (p *pingPongService) Protocols() []p2p.Protocol { - return []p2p.Protocol{{ - Name: "ping-pong", - Version: 1, - Length: 2, - Run: p.Run, - NodeInfo: p.Info, - }} -} - -func (p *pingPongService) Start() error { - p.log.Info("ping-pong service starting") - return nil -} - -func (p *pingPongService) Stop() error { - p.log.Info("ping-pong service stopping") - return nil -} - -func (p *pingPongService) Info() interface{} { - return struct { - Received int64 `json:"received"` - }{ - p.received.Load(), - } -} - -const ( - pingMsgCode = iota - pongMsgCode -) - -// Run implements the ping-pong protocol which sends ping messages to the peer -// at 10s intervals, and responds to pings with pong messages. -func (p *pingPongService) Run(peer *p2p.Peer, rw p2p.MsgReadWriter) error { - log := p.log.New("peer.id", peer.ID()) - - errC := make(chan error, 1) - go func() { - for range time.Tick(10 * time.Second) { - log.Info("sending ping") - if err := p2p.Send(rw, pingMsgCode, "PING"); err != nil { - errC <- err - return - } - } - }() - go func() { - for { - msg, err := rw.ReadMsg() - if err != nil { - errC <- err - return - } - payload, err := io.ReadAll(msg.Payload) - if err != nil { - errC <- err - return - } - log.Info("received message", "msg.code", msg.Code, "msg.payload", string(payload)) - p.received.Add(1) - if msg.Code == pingMsgCode { - log.Info("sending pong") - go p2p.Send(rw, pongMsgCode, "PONG") - } - } - }() - return <-errC -} diff --git a/p2p/simulations/examples/ping-pong.sh b/p2p/simulations/examples/ping-pong.sh deleted file mode 100755 index 47936bd9a0..0000000000 --- a/p2p/simulations/examples/ping-pong.sh +++ /dev/null @@ -1,40 +0,0 @@ -#!/bin/bash -# -# Boot a ping-pong network simulation using the HTTP API started by ping-pong.go - -set -e - -main() { - if ! which p2psim &>/dev/null; then - fail "missing p2psim binary (you need to build cmd/p2psim and put it in \$PATH)" - fi - - info "creating 10 nodes" - for i in $(seq 1 10); do - p2psim node create --name "$(node_name $i)" - p2psim node start "$(node_name $i)" - done - - info "connecting node01 to all other nodes" - for i in $(seq 2 10); do - p2psim node connect "node01" "$(node_name $i)" - done - - info "done" -} - -node_name() { - local num=$1 - echo "node$(printf '%02d' $num)" -} - -info() { - echo -e "\033[1;32m---> $(date +%H:%M:%S) ${@}\033[0m" -} - -fail() { - echo -e "\033[1;31mERROR: ${@}\033[0m" >&2 - exit 1 -} - -main "$@" diff --git a/p2p/simulations/http.go b/p2p/simulations/http.go deleted file mode 100644 index 34521b4778..0000000000 --- a/p2p/simulations/http.go +++ /dev/null @@ -1,743 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package simulations - -import ( - "bufio" - "bytes" - "context" - "encoding/json" - "errors" - "fmt" - "html" - "io" - "net/http" - "strconv" - "strings" - "sync" - - "github.com/ethereum/go-ethereum/event" - "github.com/ethereum/go-ethereum/p2p" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/simulations/adapters" - "github.com/ethereum/go-ethereum/rpc" - "github.com/gorilla/websocket" - "github.com/julienschmidt/httprouter" -) - -// DefaultClient is the default simulation API client which expects the API -// to be running at http://localhost:8888 -var DefaultClient = NewClient("http://localhost:8888") - -// Client is a client for the simulation HTTP API which supports creating -// and managing simulation networks -type Client struct { - URL string - - client *http.Client -} - -// NewClient returns a new simulation API client -func NewClient(url string) *Client { - return &Client{ - URL: url, - client: http.DefaultClient, - } -} - -// GetNetwork returns details of the network -func (c *Client) GetNetwork() (*Network, error) { - network := &Network{} - return network, c.Get("/", network) -} - -// StartNetwork starts all existing nodes in the simulation network -func (c *Client) StartNetwork() error { - return c.Post("/start", nil, nil) -} - -// StopNetwork stops all existing nodes in a simulation network -func (c *Client) StopNetwork() error { - return c.Post("/stop", nil, nil) -} - -// CreateSnapshot creates a network snapshot -func (c *Client) CreateSnapshot() (*Snapshot, error) { - snap := &Snapshot{} - return snap, c.Get("/snapshot", snap) -} - -// LoadSnapshot loads a snapshot into the network -func (c *Client) LoadSnapshot(snap *Snapshot) error { - return c.Post("/snapshot", snap, nil) -} - -// SubscribeOpts is a collection of options to use when subscribing to network -// events -type SubscribeOpts struct { - // Current instructs the server to send events for existing nodes and - // connections first - Current bool - - // Filter instructs the server to only send a subset of message events - Filter string -} - -// SubscribeNetwork subscribes to network events which are sent from the server -// as a server-sent-events stream, optionally receiving events for existing -// nodes and connections and filtering message events -func (c *Client) SubscribeNetwork(events chan *Event, opts SubscribeOpts) (event.Subscription, error) { - url := fmt.Sprintf("%s/events?current=%t&filter=%s", c.URL, opts.Current, opts.Filter) - req, err := http.NewRequest(http.MethodGet, url, nil) - if err != nil { - return nil, err - } - req.Header.Set("Accept", "text/event-stream") - res, err := c.client.Do(req) - if err != nil { - return nil, err - } - if res.StatusCode != http.StatusOK { - response, _ := io.ReadAll(res.Body) - res.Body.Close() - return nil, fmt.Errorf("unexpected HTTP status: %s: %s", res.Status, response) - } - - // define a producer function to pass to event.Subscription - // which reads server-sent events from res.Body and sends - // them to the events channel - producer := func(stop <-chan struct{}) error { - defer res.Body.Close() - - // read lines from res.Body in a goroutine so that we are - // always reading from the stop channel - lines := make(chan string) - errC := make(chan error, 1) - go func() { - s := bufio.NewScanner(res.Body) - for s.Scan() { - select { - case lines <- s.Text(): - case <-stop: - return - } - } - errC <- s.Err() - }() - - // detect any lines which start with "data:", decode the data - // into an event and send it to the events channel - for { - select { - case line := <-lines: - if !strings.HasPrefix(line, "data:") { - continue - } - data := strings.TrimSpace(strings.TrimPrefix(line, "data:")) - event := &Event{} - if err := json.Unmarshal([]byte(data), event); err != nil { - return fmt.Errorf("error decoding SSE event: %s", err) - } - select { - case events <- event: - case <-stop: - return nil - } - case err := <-errC: - return err - case <-stop: - return nil - } - } - } - - return event.NewSubscription(producer), nil -} - -// GetNodes returns all nodes which exist in the network -func (c *Client) GetNodes() ([]*p2p.NodeInfo, error) { - var nodes []*p2p.NodeInfo - return nodes, c.Get("/nodes", &nodes) -} - -// CreateNode creates a node in the network using the given configuration -func (c *Client) CreateNode(config *adapters.NodeConfig) (*p2p.NodeInfo, error) { - node := &p2p.NodeInfo{} - return node, c.Post("/nodes", config, node) -} - -// GetNode returns details of a node -func (c *Client) GetNode(nodeID string) (*p2p.NodeInfo, error) { - node := &p2p.NodeInfo{} - return node, c.Get(fmt.Sprintf("/nodes/%s", nodeID), node) -} - -// StartNode starts a node -func (c *Client) StartNode(nodeID string) error { - return c.Post(fmt.Sprintf("/nodes/%s/start", nodeID), nil, nil) -} - -// StopNode stops a node -func (c *Client) StopNode(nodeID string) error { - return c.Post(fmt.Sprintf("/nodes/%s/stop", nodeID), nil, nil) -} - -// ConnectNode connects a node to a peer node -func (c *Client) ConnectNode(nodeID, peerID string) error { - return c.Post(fmt.Sprintf("/nodes/%s/conn/%s", nodeID, peerID), nil, nil) -} - -// DisconnectNode disconnects a node from a peer node -func (c *Client) DisconnectNode(nodeID, peerID string) error { - return c.Delete(fmt.Sprintf("/nodes/%s/conn/%s", nodeID, peerID)) -} - -// RPCClient returns an RPC client connected to a node -func (c *Client) RPCClient(ctx context.Context, nodeID string) (*rpc.Client, error) { - baseURL := strings.Replace(c.URL, "http", "ws", 1) - return rpc.DialWebsocket(ctx, fmt.Sprintf("%s/nodes/%s/rpc", baseURL, nodeID), "") -} - -// Get performs a HTTP GET request decoding the resulting JSON response -// into "out" -func (c *Client) Get(path string, out interface{}) error { - return c.Send(http.MethodGet, path, nil, out) -} - -// Post performs a HTTP POST request sending "in" as the JSON body and -// decoding the resulting JSON response into "out" -func (c *Client) Post(path string, in, out interface{}) error { - return c.Send(http.MethodPost, path, in, out) -} - -// Delete performs a HTTP DELETE request -func (c *Client) Delete(path string) error { - return c.Send(http.MethodDelete, path, nil, nil) -} - -// Send performs a HTTP request, sending "in" as the JSON request body and -// decoding the JSON response into "out" -func (c *Client) Send(method, path string, in, out interface{}) error { - var body []byte - if in != nil { - var err error - body, err = json.Marshal(in) - if err != nil { - return err - } - } - req, err := http.NewRequest(method, c.URL+path, bytes.NewReader(body)) - if err != nil { - return err - } - req.Header.Set("Content-Type", "application/json") - req.Header.Set("Accept", "application/json") - res, err := c.client.Do(req) - if err != nil { - return err - } - defer res.Body.Close() - if res.StatusCode != http.StatusOK && res.StatusCode != http.StatusCreated { - response, _ := io.ReadAll(res.Body) - return fmt.Errorf("unexpected HTTP status: %s: %s", res.Status, response) - } - if out != nil { - if err := json.NewDecoder(res.Body).Decode(out); err != nil { - return err - } - } - return nil -} - -// Server is an HTTP server providing an API to manage a simulation network -type Server struct { - router *httprouter.Router - network *Network - mockerStop chan struct{} // when set, stops the current mocker - mockerMtx sync.Mutex // synchronises access to the mockerStop field -} - -// NewServer returns a new simulation API server -func NewServer(network *Network) *Server { - s := &Server{ - router: httprouter.New(), - network: network, - } - - s.OPTIONS("/", s.Options) - s.GET("/", s.GetNetwork) - s.POST("/start", s.StartNetwork) - s.POST("/stop", s.StopNetwork) - s.POST("/mocker/start", s.StartMocker) - s.POST("/mocker/stop", s.StopMocker) - s.GET("/mocker", s.GetMockers) - s.POST("/reset", s.ResetNetwork) - s.GET("/events", s.StreamNetworkEvents) - s.GET("/snapshot", s.CreateSnapshot) - s.POST("/snapshot", s.LoadSnapshot) - s.POST("/nodes", s.CreateNode) - s.GET("/nodes", s.GetNodes) - s.GET("/nodes/:nodeid", s.GetNode) - s.POST("/nodes/:nodeid/start", s.StartNode) - s.POST("/nodes/:nodeid/stop", s.StopNode) - s.POST("/nodes/:nodeid/conn/:peerid", s.ConnectNode) - s.DELETE("/nodes/:nodeid/conn/:peerid", s.DisconnectNode) - s.GET("/nodes/:nodeid/rpc", s.NodeRPC) - - return s -} - -// GetNetwork returns details of the network -func (s *Server) GetNetwork(w http.ResponseWriter, req *http.Request) { - s.JSON(w, http.StatusOK, s.network) -} - -// StartNetwork starts all nodes in the network -func (s *Server) StartNetwork(w http.ResponseWriter, req *http.Request) { - if err := s.network.StartAll(); err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } - - w.WriteHeader(http.StatusOK) -} - -// StopNetwork stops all nodes in the network -func (s *Server) StopNetwork(w http.ResponseWriter, req *http.Request) { - if err := s.network.StopAll(); err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } - - w.WriteHeader(http.StatusOK) -} - -// StartMocker starts the mocker node simulation -func (s *Server) StartMocker(w http.ResponseWriter, req *http.Request) { - s.mockerMtx.Lock() - defer s.mockerMtx.Unlock() - if s.mockerStop != nil { - http.Error(w, "mocker already running", http.StatusInternalServerError) - return - } - mockerType := req.FormValue("mocker-type") - mockerFn := LookupMocker(mockerType) - if mockerFn == nil { - http.Error(w, fmt.Sprintf("unknown mocker type %q", html.EscapeString(mockerType)), http.StatusBadRequest) - return - } - nodeCount, err := strconv.Atoi(req.FormValue("node-count")) - if err != nil { - http.Error(w, "invalid node-count provided", http.StatusBadRequest) - return - } - s.mockerStop = make(chan struct{}) - go mockerFn(s.network, s.mockerStop, nodeCount) - - w.WriteHeader(http.StatusOK) -} - -// StopMocker stops the mocker node simulation -func (s *Server) StopMocker(w http.ResponseWriter, req *http.Request) { - s.mockerMtx.Lock() - defer s.mockerMtx.Unlock() - if s.mockerStop == nil { - http.Error(w, "stop channel not initialized", http.StatusInternalServerError) - return - } - close(s.mockerStop) - s.mockerStop = nil - - w.WriteHeader(http.StatusOK) -} - -// GetMockers returns a list of available mockers -func (s *Server) GetMockers(w http.ResponseWriter, req *http.Request) { - list := GetMockerList() - s.JSON(w, http.StatusOK, list) -} - -// ResetNetwork resets all properties of a network to its initial (empty) state -func (s *Server) ResetNetwork(w http.ResponseWriter, req *http.Request) { - s.network.Reset() - - w.WriteHeader(http.StatusOK) -} - -// StreamNetworkEvents streams network events as a server-sent-events stream -func (s *Server) StreamNetworkEvents(w http.ResponseWriter, req *http.Request) { - events := make(chan *Event) - sub := s.network.events.Subscribe(events) - defer sub.Unsubscribe() - - // write writes the given event and data to the stream like: - // - // event: - // data: - // - write := func(event, data string) { - fmt.Fprintf(w, "event: %s\n", event) - fmt.Fprintf(w, "data: %s\n\n", data) - if fw, ok := w.(http.Flusher); ok { - fw.Flush() - } - } - writeEvent := func(event *Event) error { - data, err := json.Marshal(event) - if err != nil { - return err - } - write("network", string(data)) - return nil - } - writeErr := func(err error) { - write("error", err.Error()) - } - - // check if filtering has been requested - var filters MsgFilters - if filterParam := req.URL.Query().Get("filter"); filterParam != "" { - var err error - filters, err = NewMsgFilters(filterParam) - if err != nil { - http.Error(w, err.Error(), http.StatusBadRequest) - return - } - } - - w.Header().Set("Content-Type", "text/event-stream; charset=utf-8") - w.WriteHeader(http.StatusOK) - fmt.Fprintf(w, "\n\n") - if fw, ok := w.(http.Flusher); ok { - fw.Flush() - } - - // optionally send the existing nodes and connections - if req.URL.Query().Get("current") == "true" { - snap, err := s.network.Snapshot() - if err != nil { - writeErr(err) - return - } - for _, node := range snap.Nodes { - event := NewEvent(&node.Node) - if err := writeEvent(event); err != nil { - writeErr(err) - return - } - } - for _, conn := range snap.Conns { - conn := conn - event := NewEvent(&conn) - if err := writeEvent(event); err != nil { - writeErr(err) - return - } - } - } - - clientGone := req.Context().Done() - for { - select { - case event := <-events: - // only send message events which match the filters - if event.Msg != nil && !filters.Match(event.Msg) { - continue - } - if err := writeEvent(event); err != nil { - writeErr(err) - return - } - case <-clientGone: - return - } - } -} - -// NewMsgFilters constructs a collection of message filters from a URL query -// parameter. -// -// The parameter is expected to be a dash-separated list of individual filters, -// each having the format ':', where is the name of a -// protocol and is a comma-separated list of message codes. -// -// A message code of '*' or '-1' is considered a wildcard and matches any code. -func NewMsgFilters(filterParam string) (MsgFilters, error) { - filters := make(MsgFilters) - for _, filter := range strings.Split(filterParam, "-") { - proto, codes, found := strings.Cut(filter, ":") - if !found || proto == "" || codes == "" { - return nil, fmt.Errorf("invalid message filter: %s", filter) - } - - for _, code := range strings.Split(codes, ",") { - if code == "*" || code == "-1" { - filters[MsgFilter{Proto: proto, Code: -1}] = struct{}{} - continue - } - n, err := strconv.ParseUint(code, 10, 64) - if err != nil { - return nil, fmt.Errorf("invalid message code: %s", code) - } - filters[MsgFilter{Proto: proto, Code: int64(n)}] = struct{}{} - } - } - return filters, nil -} - -// MsgFilters is a collection of filters which are used to filter message -// events -type MsgFilters map[MsgFilter]struct{} - -// Match checks if the given message matches any of the filters -func (m MsgFilters) Match(msg *Msg) bool { - // check if there is a wildcard filter for the message's protocol - if _, ok := m[MsgFilter{Proto: msg.Protocol, Code: -1}]; ok { - return true - } - - // check if there is a filter for the message's protocol and code - if _, ok := m[MsgFilter{Proto: msg.Protocol, Code: int64(msg.Code)}]; ok { - return true - } - - return false -} - -// MsgFilter is used to filter message events based on protocol and message -// code -type MsgFilter struct { - // Proto is matched against a message's protocol - Proto string - - // Code is matched against a message's code, with -1 matching all codes - Code int64 -} - -// CreateSnapshot creates a network snapshot -func (s *Server) CreateSnapshot(w http.ResponseWriter, req *http.Request) { - snap, err := s.network.Snapshot() - if err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } - - s.JSON(w, http.StatusOK, snap) -} - -// LoadSnapshot loads a snapshot into the network -func (s *Server) LoadSnapshot(w http.ResponseWriter, req *http.Request) { - snap := &Snapshot{} - if err := json.NewDecoder(req.Body).Decode(snap); err != nil { - http.Error(w, err.Error(), http.StatusBadRequest) - return - } - - if err := s.network.Load(snap); err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } - - s.JSON(w, http.StatusOK, s.network) -} - -// CreateNode creates a node in the network using the given configuration -func (s *Server) CreateNode(w http.ResponseWriter, req *http.Request) { - config := &adapters.NodeConfig{} - - err := json.NewDecoder(req.Body).Decode(config) - if err != nil && !errors.Is(err, io.EOF) { - http.Error(w, err.Error(), http.StatusBadRequest) - return - } - - node, err := s.network.NewNodeWithConfig(config) - if err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } - - s.JSON(w, http.StatusCreated, node.NodeInfo()) -} - -// GetNodes returns all nodes which exist in the network -func (s *Server) GetNodes(w http.ResponseWriter, req *http.Request) { - nodes := s.network.GetNodes() - - infos := make([]*p2p.NodeInfo, len(nodes)) - for i, node := range nodes { - infos[i] = node.NodeInfo() - } - - s.JSON(w, http.StatusOK, infos) -} - -// GetNode returns details of a node -func (s *Server) GetNode(w http.ResponseWriter, req *http.Request) { - node := req.Context().Value("node").(*Node) - - s.JSON(w, http.StatusOK, node.NodeInfo()) -} - -// StartNode starts a node -func (s *Server) StartNode(w http.ResponseWriter, req *http.Request) { - node := req.Context().Value("node").(*Node) - - if err := s.network.Start(node.ID()); err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } - - s.JSON(w, http.StatusOK, node.NodeInfo()) -} - -// StopNode stops a node -func (s *Server) StopNode(w http.ResponseWriter, req *http.Request) { - node := req.Context().Value("node").(*Node) - - if err := s.network.Stop(node.ID()); err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } - - s.JSON(w, http.StatusOK, node.NodeInfo()) -} - -// ConnectNode connects a node to a peer node -func (s *Server) ConnectNode(w http.ResponseWriter, req *http.Request) { - node := req.Context().Value("node").(*Node) - peer := req.Context().Value("peer").(*Node) - - if err := s.network.Connect(node.ID(), peer.ID()); err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } - - s.JSON(w, http.StatusOK, node.NodeInfo()) -} - -// DisconnectNode disconnects a node from a peer node -func (s *Server) DisconnectNode(w http.ResponseWriter, req *http.Request) { - node := req.Context().Value("node").(*Node) - peer := req.Context().Value("peer").(*Node) - - if err := s.network.Disconnect(node.ID(), peer.ID()); err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } - - s.JSON(w, http.StatusOK, node.NodeInfo()) -} - -// Options responds to the OPTIONS HTTP method by returning a 200 OK response -// with the "Access-Control-Allow-Headers" header set to "Content-Type" -func (s *Server) Options(w http.ResponseWriter, req *http.Request) { - w.Header().Set("Access-Control-Allow-Headers", "Content-Type") - w.WriteHeader(http.StatusOK) -} - -var wsUpgrade = websocket.Upgrader{ - CheckOrigin: func(*http.Request) bool { return true }, -} - -// NodeRPC forwards RPC requests to a node in the network via a WebSocket -// connection -func (s *Server) NodeRPC(w http.ResponseWriter, req *http.Request) { - conn, err := wsUpgrade.Upgrade(w, req, nil) - if err != nil { - return - } - defer conn.Close() - node := req.Context().Value("node").(*Node) - node.ServeRPC(conn) -} - -// ServeHTTP implements the http.Handler interface by delegating to the -// underlying httprouter.Router -func (s *Server) ServeHTTP(w http.ResponseWriter, req *http.Request) { - s.router.ServeHTTP(w, req) -} - -// GET registers a handler for GET requests to a particular path -func (s *Server) GET(path string, handle http.HandlerFunc) { - s.router.GET(path, s.wrapHandler(handle)) -} - -// POST registers a handler for POST requests to a particular path -func (s *Server) POST(path string, handle http.HandlerFunc) { - s.router.POST(path, s.wrapHandler(handle)) -} - -// DELETE registers a handler for DELETE requests to a particular path -func (s *Server) DELETE(path string, handle http.HandlerFunc) { - s.router.DELETE(path, s.wrapHandler(handle)) -} - -// OPTIONS registers a handler for OPTIONS requests to a particular path -func (s *Server) OPTIONS(path string, handle http.HandlerFunc) { - s.router.OPTIONS("/*path", s.wrapHandler(handle)) -} - -// JSON sends "data" as a JSON HTTP response -func (s *Server) JSON(w http.ResponseWriter, status int, data interface{}) { - w.Header().Set("Content-Type", "application/json") - w.WriteHeader(status) - json.NewEncoder(w).Encode(data) -} - -// wrapHandler returns an httprouter.Handle which wraps an http.HandlerFunc by -// populating request.Context with any objects from the URL params -func (s *Server) wrapHandler(handler http.HandlerFunc) httprouter.Handle { - return func(w http.ResponseWriter, req *http.Request, params httprouter.Params) { - w.Header().Set("Access-Control-Allow-Origin", "*") - w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS") - - ctx := req.Context() - - if id := params.ByName("nodeid"); id != "" { - var nodeID enode.ID - var node *Node - if nodeID.UnmarshalText([]byte(id)) == nil { - node = s.network.GetNode(nodeID) - } else { - node = s.network.GetNodeByName(id) - } - if node == nil { - http.NotFound(w, req) - return - } - ctx = context.WithValue(ctx, "node", node) - } - - if id := params.ByName("peerid"); id != "" { - var peerID enode.ID - var peer *Node - if peerID.UnmarshalText([]byte(id)) == nil { - peer = s.network.GetNode(peerID) - } else { - peer = s.network.GetNodeByName(id) - } - if peer == nil { - http.NotFound(w, req) - return - } - ctx = context.WithValue(ctx, "peer", peer) - } - - handler(w, req.WithContext(ctx)) - } -} diff --git a/p2p/simulations/http_test.go b/p2p/simulations/http_test.go deleted file mode 100644 index cd03e600f3..0000000000 --- a/p2p/simulations/http_test.go +++ /dev/null @@ -1,869 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package simulations - -import ( - "context" - "flag" - "fmt" - "log/slog" - "math/rand" - "net/http/httptest" - "os" - "reflect" - "sync" - "sync/atomic" - "testing" - "time" - - "github.com/ethereum/go-ethereum/event" - "github.com/ethereum/go-ethereum/log" - "github.com/ethereum/go-ethereum/node" - "github.com/ethereum/go-ethereum/p2p" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/simulations/adapters" - "github.com/ethereum/go-ethereum/rpc" - "github.com/mattn/go-colorable" -) - -func TestMain(m *testing.M) { - loglevel := flag.Int("loglevel", 2, "verbosity of logs") - - flag.Parse() - log.SetDefault(log.NewLogger(log.NewTerminalHandlerWithLevel(colorable.NewColorableStderr(), slog.Level(*loglevel), true))) - os.Exit(m.Run()) -} - -// testService implements the node.Service interface and provides protocols -// and APIs which are useful for testing nodes in a simulation network -type testService struct { - id enode.ID - - // peerCount is incremented once a peer handshake has been performed - peerCount int64 - - peers map[enode.ID]*testPeer - peersMtx sync.Mutex - - // state stores []byte which is used to test creating and loading - // snapshots - state atomic.Value -} - -func newTestService(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) { - svc := &testService{ - id: ctx.Config.ID, - peers: make(map[enode.ID]*testPeer), - } - svc.state.Store(ctx.Snapshot) - - stack.RegisterProtocols(svc.Protocols()) - stack.RegisterAPIs(svc.APIs()) - return svc, nil -} - -type testPeer struct { - testReady chan struct{} - dumReady chan struct{} -} - -func (t *testService) peer(id enode.ID) *testPeer { - t.peersMtx.Lock() - defer t.peersMtx.Unlock() - if peer, ok := t.peers[id]; ok { - return peer - } - peer := &testPeer{ - testReady: make(chan struct{}), - dumReady: make(chan struct{}), - } - t.peers[id] = peer - return peer -} - -func (t *testService) Protocols() []p2p.Protocol { - return []p2p.Protocol{ - { - Name: "test", - Version: 1, - Length: 3, - Run: t.RunTest, - }, - { - Name: "dum", - Version: 1, - Length: 1, - Run: t.RunDum, - }, - { - Name: "prb", - Version: 1, - Length: 1, - Run: t.RunPrb, - }, - } -} - -func (t *testService) APIs() []rpc.API { - return []rpc.API{{ - Namespace: "test", - Version: "1.0", - Service: &TestAPI{ - state: &t.state, - peerCount: &t.peerCount, - }, - }} -} - -func (t *testService) Start() error { - return nil -} - -func (t *testService) Stop() error { - return nil -} - -// handshake performs a peer handshake by sending and expecting an empty -// message with the given code -func (t *testService) handshake(rw p2p.MsgReadWriter, code uint64) error { - errc := make(chan error, 2) - go func() { errc <- p2p.SendItems(rw, code) }() - go func() { errc <- p2p.ExpectMsg(rw, code, struct{}{}) }() - for i := 0; i < 2; i++ { - if err := <-errc; err != nil { - return err - } - } - return nil -} - -func (t *testService) RunTest(p *p2p.Peer, rw p2p.MsgReadWriter) error { - peer := t.peer(p.ID()) - - // perform three handshakes with three different message codes, - // used to test message sending and filtering - if err := t.handshake(rw, 2); err != nil { - return err - } - if err := t.handshake(rw, 1); err != nil { - return err - } - if err := t.handshake(rw, 0); err != nil { - return err - } - - // close the testReady channel so that other protocols can run - close(peer.testReady) - - // track the peer - atomic.AddInt64(&t.peerCount, 1) - defer atomic.AddInt64(&t.peerCount, -1) - - // block until the peer is dropped - for { - _, err := rw.ReadMsg() - if err != nil { - return err - } - } -} - -func (t *testService) RunDum(p *p2p.Peer, rw p2p.MsgReadWriter) error { - peer := t.peer(p.ID()) - - // wait for the test protocol to perform its handshake - <-peer.testReady - - // perform a handshake - if err := t.handshake(rw, 0); err != nil { - return err - } - - // close the dumReady channel so that other protocols can run - close(peer.dumReady) - - // block until the peer is dropped - for { - _, err := rw.ReadMsg() - if err != nil { - return err - } - } -} -func (t *testService) RunPrb(p *p2p.Peer, rw p2p.MsgReadWriter) error { - peer := t.peer(p.ID()) - - // wait for the dum protocol to perform its handshake - <-peer.dumReady - - // perform a handshake - if err := t.handshake(rw, 0); err != nil { - return err - } - - // block until the peer is dropped - for { - _, err := rw.ReadMsg() - if err != nil { - return err - } - } -} - -func (t *testService) Snapshot() ([]byte, error) { - return t.state.Load().([]byte), nil -} - -// TestAPI provides a test API to: -// * get the peer count -// * get and set an arbitrary state byte slice -// * get and increment a counter -// * subscribe to counter increment events -type TestAPI struct { - state *atomic.Value - peerCount *int64 - counter int64 - feed event.Feed -} - -func (t *TestAPI) PeerCount() int64 { - return atomic.LoadInt64(t.peerCount) -} - -func (t *TestAPI) Get() int64 { - return atomic.LoadInt64(&t.counter) -} - -func (t *TestAPI) Add(delta int64) { - atomic.AddInt64(&t.counter, delta) - t.feed.Send(delta) -} - -func (t *TestAPI) GetState() []byte { - return t.state.Load().([]byte) -} - -func (t *TestAPI) SetState(state []byte) { - t.state.Store(state) -} - -func (t *TestAPI) Events(ctx context.Context) (*rpc.Subscription, error) { - notifier, supported := rpc.NotifierFromContext(ctx) - if !supported { - return nil, rpc.ErrNotificationsUnsupported - } - - rpcSub := notifier.CreateSubscription() - - go func() { - events := make(chan int64) - sub := t.feed.Subscribe(events) - defer sub.Unsubscribe() - - for { - select { - case event := <-events: - notifier.Notify(rpcSub.ID, event) - case <-sub.Err(): - return - case <-rpcSub.Err(): - return - } - } - }() - - return rpcSub, nil -} - -var testServices = adapters.LifecycleConstructors{ - "test": newTestService, -} - -func testHTTPServer(t *testing.T) (*Network, *httptest.Server) { - t.Helper() - adapter := adapters.NewSimAdapter(testServices) - network := NewNetwork(adapter, &NetworkConfig{ - DefaultService: "test", - }) - return network, httptest.NewServer(NewServer(network)) -} - -// TestHTTPNetwork tests interacting with a simulation network using the HTTP -// API -func TestHTTPNetwork(t *testing.T) { - // start the server - network, s := testHTTPServer(t) - defer s.Close() - - // subscribe to events so we can check them later - client := NewClient(s.URL) - events := make(chan *Event, 100) - var opts SubscribeOpts - sub, err := client.SubscribeNetwork(events, opts) - if err != nil { - t.Fatalf("error subscribing to network events: %s", err) - } - defer sub.Unsubscribe() - - // check we can retrieve details about the network - gotNetwork, err := client.GetNetwork() - if err != nil { - t.Fatalf("error getting network: %s", err) - } - if gotNetwork.ID != network.ID { - t.Fatalf("expected network to have ID %q, got %q", network.ID, gotNetwork.ID) - } - - // start a simulation network - nodeIDs := startTestNetwork(t, client) - - // check we got all the events - x := &expectEvents{t, events, sub} - x.expect( - x.nodeEvent(nodeIDs[0], false), - x.nodeEvent(nodeIDs[1], false), - x.nodeEvent(nodeIDs[0], true), - x.nodeEvent(nodeIDs[1], true), - x.connEvent(nodeIDs[0], nodeIDs[1], false), - x.connEvent(nodeIDs[0], nodeIDs[1], true), - ) - - // reconnect the stream and check we get the current nodes and conns - events = make(chan *Event, 100) - opts.Current = true - sub, err = client.SubscribeNetwork(events, opts) - if err != nil { - t.Fatalf("error subscribing to network events: %s", err) - } - defer sub.Unsubscribe() - x = &expectEvents{t, events, sub} - x.expect( - x.nodeEvent(nodeIDs[0], true), - x.nodeEvent(nodeIDs[1], true), - x.connEvent(nodeIDs[0], nodeIDs[1], true), - ) -} - -func startTestNetwork(t *testing.T, client *Client) []string { - // create two nodes - nodeCount := 2 - nodeIDs := make([]string, nodeCount) - for i := 0; i < nodeCount; i++ { - config := adapters.RandomNodeConfig() - node, err := client.CreateNode(config) - if err != nil { - t.Fatalf("error creating node: %s", err) - } - nodeIDs[i] = node.ID - } - - // check both nodes exist - nodes, err := client.GetNodes() - if err != nil { - t.Fatalf("error getting nodes: %s", err) - } - if len(nodes) != nodeCount { - t.Fatalf("expected %d nodes, got %d", nodeCount, len(nodes)) - } - for i, nodeID := range nodeIDs { - if nodes[i].ID != nodeID { - t.Fatalf("expected node %d to have ID %q, got %q", i, nodeID, nodes[i].ID) - } - node, err := client.GetNode(nodeID) - if err != nil { - t.Fatalf("error getting node %d: %s", i, err) - } - if node.ID != nodeID { - t.Fatalf("expected node %d to have ID %q, got %q", i, nodeID, node.ID) - } - } - - // start both nodes - for _, nodeID := range nodeIDs { - if err := client.StartNode(nodeID); err != nil { - t.Fatalf("error starting node %q: %s", nodeID, err) - } - } - - // connect the nodes - for i := 0; i < nodeCount-1; i++ { - peerId := i + 1 - if i == nodeCount-1 { - peerId = 0 - } - if err := client.ConnectNode(nodeIDs[i], nodeIDs[peerId]); err != nil { - t.Fatalf("error connecting nodes: %s", err) - } - } - - return nodeIDs -} - -type expectEvents struct { - *testing.T - - events chan *Event - sub event.Subscription -} - -func (t *expectEvents) nodeEvent(id string, up bool) *Event { - config := &adapters.NodeConfig{ID: enode.HexID(id)} - return &Event{Type: EventTypeNode, Node: newNode(nil, config, up)} -} - -func (t *expectEvents) connEvent(one, other string, up bool) *Event { - return &Event{ - Type: EventTypeConn, - Conn: &Conn{ - One: enode.HexID(one), - Other: enode.HexID(other), - Up: up, - }, - } -} - -func (t *expectEvents) expectMsgs(expected map[MsgFilter]int) { - actual := make(map[MsgFilter]int) - timeout := time.After(10 * time.Second) -loop: - for { - select { - case event := <-t.events: - t.Logf("received %s event: %v", event.Type, event) - - if event.Type != EventTypeMsg || event.Msg.Received { - continue loop - } - if event.Msg == nil { - t.Fatal("expected event.Msg to be set") - } - filter := MsgFilter{ - Proto: event.Msg.Protocol, - Code: int64(event.Msg.Code), - } - actual[filter]++ - if actual[filter] > expected[filter] { - t.Fatalf("received too many msgs for filter: %v", filter) - } - if reflect.DeepEqual(actual, expected) { - return - } - - case err := <-t.sub.Err(): - t.Fatalf("network stream closed unexpectedly: %s", err) - - case <-timeout: - t.Fatal("timed out waiting for expected events") - } - } -} - -func (t *expectEvents) expect(events ...*Event) { - t.Helper() - timeout := time.After(10 * time.Second) - i := 0 - for { - select { - case event := <-t.events: - t.Logf("received %s event: %v", event.Type, event) - - expected := events[i] - if event.Type != expected.Type { - t.Fatalf("expected event %d to have type %q, got %q", i, expected.Type, event.Type) - } - - switch expected.Type { - case EventTypeNode: - if event.Node == nil { - t.Fatal("expected event.Node to be set") - } - if event.Node.ID() != expected.Node.ID() { - t.Fatalf("expected node event %d to have id %q, got %q", i, expected.Node.ID().TerminalString(), event.Node.ID().TerminalString()) - } - if event.Node.Up() != expected.Node.Up() { - t.Fatalf("expected node event %d to have up=%t, got up=%t", i, expected.Node.Up(), event.Node.Up()) - } - - case EventTypeConn: - if event.Conn == nil { - t.Fatal("expected event.Conn to be set") - } - if event.Conn.One != expected.Conn.One { - t.Fatalf("expected conn event %d to have one=%q, got one=%q", i, expected.Conn.One.TerminalString(), event.Conn.One.TerminalString()) - } - if event.Conn.Other != expected.Conn.Other { - t.Fatalf("expected conn event %d to have other=%q, got other=%q", i, expected.Conn.Other.TerminalString(), event.Conn.Other.TerminalString()) - } - if event.Conn.Up != expected.Conn.Up { - t.Fatalf("expected conn event %d to have up=%t, got up=%t", i, expected.Conn.Up, event.Conn.Up) - } - } - - i++ - if i == len(events) { - return - } - - case err := <-t.sub.Err(): - t.Fatalf("network stream closed unexpectedly: %s", err) - - case <-timeout: - t.Fatal("timed out waiting for expected events") - } - } -} - -// TestHTTPNodeRPC tests calling RPC methods on nodes via the HTTP API -func TestHTTPNodeRPC(t *testing.T) { - // start the server - _, s := testHTTPServer(t) - defer s.Close() - - // start a node in the network - client := NewClient(s.URL) - - config := adapters.RandomNodeConfig() - node, err := client.CreateNode(config) - if err != nil { - t.Fatalf("error creating node: %s", err) - } - if err := client.StartNode(node.ID); err != nil { - t.Fatalf("error starting node: %s", err) - } - - // create two RPC clients - ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second) - defer cancel() - rpcClient1, err := client.RPCClient(ctx, node.ID) - if err != nil { - t.Fatalf("error getting node RPC client: %s", err) - } - rpcClient2, err := client.RPCClient(ctx, node.ID) - if err != nil { - t.Fatalf("error getting node RPC client: %s", err) - } - - // subscribe to events using client 1 - events := make(chan int64, 1) - sub, err := rpcClient1.Subscribe(ctx, "test", events, "events") - if err != nil { - t.Fatalf("error subscribing to events: %s", err) - } - defer sub.Unsubscribe() - - // call some RPC methods using client 2 - if err := rpcClient2.CallContext(ctx, nil, "test_add", 10); err != nil { - t.Fatalf("error calling RPC method: %s", err) - } - var result int64 - if err := rpcClient2.CallContext(ctx, &result, "test_get"); err != nil { - t.Fatalf("error calling RPC method: %s", err) - } - if result != 10 { - t.Fatalf("expected result to be 10, got %d", result) - } - - // check we got an event from client 1 - select { - case event := <-events: - if event != 10 { - t.Fatalf("expected event to be 10, got %d", event) - } - case <-ctx.Done(): - t.Fatal(ctx.Err()) - } -} - -// TestHTTPSnapshot tests creating and loading network snapshots -func TestHTTPSnapshot(t *testing.T) { - // start the server - network, s := testHTTPServer(t) - defer s.Close() - - var eventsDone = make(chan struct{}, 1) - count := 1 - eventsDoneChan := make(chan *Event) - eventSub := network.Events().Subscribe(eventsDoneChan) - go func() { - defer eventSub.Unsubscribe() - for event := range eventsDoneChan { - if event.Type == EventTypeConn && !event.Control { - count-- - if count == 0 { - eventsDone <- struct{}{} - return - } - } - } - }() - - // create a two-node network - client := NewClient(s.URL) - nodeCount := 2 - nodes := make([]*p2p.NodeInfo, nodeCount) - for i := 0; i < nodeCount; i++ { - config := adapters.RandomNodeConfig() - node, err := client.CreateNode(config) - if err != nil { - t.Fatalf("error creating node: %s", err) - } - if err := client.StartNode(node.ID); err != nil { - t.Fatalf("error starting node: %s", err) - } - nodes[i] = node - } - if err := client.ConnectNode(nodes[0].ID, nodes[1].ID); err != nil { - t.Fatalf("error connecting nodes: %s", err) - } - - // store some state in the test services - states := make([]string, nodeCount) - for i, node := range nodes { - rpc, err := client.RPCClient(context.Background(), node.ID) - if err != nil { - t.Fatalf("error getting RPC client: %s", err) - } - defer rpc.Close() - state := fmt.Sprintf("%x", rand.Int()) - if err := rpc.Call(nil, "test_setState", []byte(state)); err != nil { - t.Fatalf("error setting service state: %s", err) - } - states[i] = state - } - <-eventsDone - // create a snapshot - snap, err := client.CreateSnapshot() - if err != nil { - t.Fatalf("error creating snapshot: %s", err) - } - for i, state := range states { - gotState := snap.Nodes[i].Snapshots["test"] - if string(gotState) != state { - t.Fatalf("expected snapshot state %q, got %q", state, gotState) - } - } - - // create another network - network2, s := testHTTPServer(t) - defer s.Close() - client = NewClient(s.URL) - count = 1 - eventSub = network2.Events().Subscribe(eventsDoneChan) - go func() { - defer eventSub.Unsubscribe() - for event := range eventsDoneChan { - if event.Type == EventTypeConn && !event.Control { - count-- - if count == 0 { - eventsDone <- struct{}{} - return - } - } - } - }() - - // subscribe to events so we can check them later - events := make(chan *Event, 100) - var opts SubscribeOpts - sub, err := client.SubscribeNetwork(events, opts) - if err != nil { - t.Fatalf("error subscribing to network events: %s", err) - } - defer sub.Unsubscribe() - - // load the snapshot - if err := client.LoadSnapshot(snap); err != nil { - t.Fatalf("error loading snapshot: %s", err) - } - <-eventsDone - - // check the nodes and connection exists - net, err := client.GetNetwork() - if err != nil { - t.Fatalf("error getting network: %s", err) - } - if len(net.Nodes) != nodeCount { - t.Fatalf("expected network to have %d nodes, got %d", nodeCount, len(net.Nodes)) - } - for i, node := range nodes { - id := net.Nodes[i].ID().String() - if id != node.ID { - t.Fatalf("expected node %d to have ID %s, got %s", i, node.ID, id) - } - } - if len(net.Conns) != 1 { - t.Fatalf("expected network to have 1 connection, got %d", len(net.Conns)) - } - conn := net.Conns[0] - if conn.One.String() != nodes[0].ID { - t.Fatalf("expected connection to have one=%q, got one=%q", nodes[0].ID, conn.One) - } - if conn.Other.String() != nodes[1].ID { - t.Fatalf("expected connection to have other=%q, got other=%q", nodes[1].ID, conn.Other) - } - if !conn.Up { - t.Fatal("should be up") - } - - // check the node states were restored - for i, node := range nodes { - rpc, err := client.RPCClient(context.Background(), node.ID) - if err != nil { - t.Fatalf("error getting RPC client: %s", err) - } - defer rpc.Close() - var state []byte - if err := rpc.Call(&state, "test_getState"); err != nil { - t.Fatalf("error getting service state: %s", err) - } - if string(state) != states[i] { - t.Fatalf("expected snapshot state %q, got %q", states[i], state) - } - } - - // check we got all the events - x := &expectEvents{t, events, sub} - x.expect( - x.nodeEvent(nodes[0].ID, false), - x.nodeEvent(nodes[0].ID, true), - x.nodeEvent(nodes[1].ID, false), - x.nodeEvent(nodes[1].ID, true), - x.connEvent(nodes[0].ID, nodes[1].ID, false), - x.connEvent(nodes[0].ID, nodes[1].ID, true), - ) -} - -// TestMsgFilterPassMultiple tests streaming message events using a filter -// with multiple protocols -func TestMsgFilterPassMultiple(t *testing.T) { - // start the server - _, s := testHTTPServer(t) - defer s.Close() - - // subscribe to events with a message filter - client := NewClient(s.URL) - events := make(chan *Event, 10) - opts := SubscribeOpts{ - Filter: "prb:0-test:0", - } - sub, err := client.SubscribeNetwork(events, opts) - if err != nil { - t.Fatalf("error subscribing to network events: %s", err) - } - defer sub.Unsubscribe() - - // start a simulation network - startTestNetwork(t, client) - - // check we got the expected events - x := &expectEvents{t, events, sub} - x.expectMsgs(map[MsgFilter]int{ - {"test", 0}: 2, - {"prb", 0}: 2, - }) -} - -// TestMsgFilterPassWildcard tests streaming message events using a filter -// with a code wildcard -func TestMsgFilterPassWildcard(t *testing.T) { - // start the server - _, s := testHTTPServer(t) - defer s.Close() - - // subscribe to events with a message filter - client := NewClient(s.URL) - events := make(chan *Event, 10) - opts := SubscribeOpts{ - Filter: "prb:0,2-test:*", - } - sub, err := client.SubscribeNetwork(events, opts) - if err != nil { - t.Fatalf("error subscribing to network events: %s", err) - } - defer sub.Unsubscribe() - - // start a simulation network - startTestNetwork(t, client) - - // check we got the expected events - x := &expectEvents{t, events, sub} - x.expectMsgs(map[MsgFilter]int{ - {"test", 2}: 2, - {"test", 1}: 2, - {"test", 0}: 2, - {"prb", 0}: 2, - }) -} - -// TestMsgFilterPassSingle tests streaming message events using a filter -// with a single protocol and code -func TestMsgFilterPassSingle(t *testing.T) { - // start the server - _, s := testHTTPServer(t) - defer s.Close() - - // subscribe to events with a message filter - client := NewClient(s.URL) - events := make(chan *Event, 10) - opts := SubscribeOpts{ - Filter: "dum:0", - } - sub, err := client.SubscribeNetwork(events, opts) - if err != nil { - t.Fatalf("error subscribing to network events: %s", err) - } - defer sub.Unsubscribe() - - // start a simulation network - startTestNetwork(t, client) - - // check we got the expected events - x := &expectEvents{t, events, sub} - x.expectMsgs(map[MsgFilter]int{ - {"dum", 0}: 2, - }) -} - -// TestMsgFilterFailBadParams tests streaming message events using an invalid -// filter -func TestMsgFilterFailBadParams(t *testing.T) { - // start the server - _, s := testHTTPServer(t) - defer s.Close() - - client := NewClient(s.URL) - events := make(chan *Event, 10) - opts := SubscribeOpts{ - Filter: "foo:", - } - _, err := client.SubscribeNetwork(events, opts) - if err == nil { - t.Fatalf("expected event subscription to fail but succeeded!") - } - - opts.Filter = "bzz:aa" - _, err = client.SubscribeNetwork(events, opts) - if err == nil { - t.Fatalf("expected event subscription to fail but succeeded!") - } - - opts.Filter = "invalid" - _, err = client.SubscribeNetwork(events, opts) - if err == nil { - t.Fatalf("expected event subscription to fail but succeeded!") - } -} diff --git a/p2p/simulations/mocker.go b/p2p/simulations/mocker.go deleted file mode 100644 index 8763df67ef..0000000000 --- a/p2p/simulations/mocker.go +++ /dev/null @@ -1,197 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -// Package simulations simulates p2p networks. -// A mocker simulates starting and stopping real nodes in a network. -package simulations - -import ( - "fmt" - "math/rand" - "sync" - "time" - - "github.com/ethereum/go-ethereum/log" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/simulations/adapters" -) - -// a map of mocker names to its function -var mockerList = map[string]func(net *Network, quit chan struct{}, nodeCount int){ - "startStop": startStop, - "probabilistic": probabilistic, - "boot": boot, -} - -// LookupMocker looks a mocker by its name, returns the mockerFn -func LookupMocker(mockerType string) func(net *Network, quit chan struct{}, nodeCount int) { - return mockerList[mockerType] -} - -// GetMockerList returns a list of mockers (keys of the map) -// Useful for frontend to build available mocker selection -func GetMockerList() []string { - list := make([]string, 0, len(mockerList)) - for k := range mockerList { - list = append(list, k) - } - return list -} - -// The boot mockerFn only connects the node in a ring and doesn't do anything else -func boot(net *Network, quit chan struct{}, nodeCount int) { - _, err := connectNodesInRing(net, nodeCount) - if err != nil { - panic("Could not startup node network for mocker") - } -} - -// The startStop mockerFn stops and starts nodes in a defined period (ticker) -func startStop(net *Network, quit chan struct{}, nodeCount int) { - nodes, err := connectNodesInRing(net, nodeCount) - if err != nil { - panic("Could not startup node network for mocker") - } - var ( - tick = time.NewTicker(10 * time.Second) - timer = time.NewTimer(3 * time.Second) - ) - defer tick.Stop() - defer timer.Stop() - - for { - select { - case <-quit: - log.Info("Terminating simulation loop") - return - case <-tick.C: - id := nodes[rand.Intn(len(nodes))] - log.Info("stopping node", "id", id) - if err := net.Stop(id); err != nil { - log.Error("error stopping node", "id", id, "err", err) - return - } - - timer.Reset(3 * time.Second) - select { - case <-quit: - log.Info("Terminating simulation loop") - return - case <-timer.C: - } - - log.Debug("starting node", "id", id) - if err := net.Start(id); err != nil { - log.Error("error starting node", "id", id, "err", err) - return - } - } - } -} - -// The probabilistic mocker func has a more probabilistic pattern -// (the implementation could probably be improved): -// nodes are connected in a ring, then a varying number of random nodes is selected, -// mocker then stops and starts them in random intervals, and continues the loop -func probabilistic(net *Network, quit chan struct{}, nodeCount int) { - nodes, err := connectNodesInRing(net, nodeCount) - if err != nil { - select { - case <-quit: - //error may be due to abortion of mocking; so the quit channel is closed - return - default: - panic("Could not startup node network for mocker") - } - } - for { - select { - case <-quit: - log.Info("Terminating simulation loop") - return - default: - } - var lowid, highid int - var wg sync.WaitGroup - randWait := time.Duration(rand.Intn(5000)+1000) * time.Millisecond - rand1 := rand.Intn(nodeCount - 1) - rand2 := rand.Intn(nodeCount - 1) - if rand1 <= rand2 { - lowid = rand1 - highid = rand2 - } else if rand1 > rand2 { - highid = rand1 - lowid = rand2 - } - var steps = highid - lowid - wg.Add(steps) - for i := lowid; i < highid; i++ { - select { - case <-quit: - log.Info("Terminating simulation loop") - return - case <-time.After(randWait): - } - log.Debug(fmt.Sprintf("node %v shutting down", nodes[i])) - err := net.Stop(nodes[i]) - if err != nil { - log.Error("Error stopping node", "node", nodes[i]) - wg.Done() - continue - } - go func(id enode.ID) { - time.Sleep(randWait) - err := net.Start(id) - if err != nil { - log.Error("Error starting node", "node", id) - } - wg.Done() - }(nodes[i]) - } - wg.Wait() - } -} - -// connect nodeCount number of nodes in a ring -func connectNodesInRing(net *Network, nodeCount int) ([]enode.ID, error) { - ids := make([]enode.ID, nodeCount) - for i := 0; i < nodeCount; i++ { - conf := adapters.RandomNodeConfig() - node, err := net.NewNodeWithConfig(conf) - if err != nil { - log.Error("Error creating a node!", "err", err) - return nil, err - } - ids[i] = node.ID() - } - - for _, id := range ids { - if err := net.Start(id); err != nil { - log.Error("Error starting a node!", "err", err) - return nil, err - } - log.Debug(fmt.Sprintf("node %v starting up", id)) - } - for i, id := range ids { - peerID := ids[(i+1)%len(ids)] - if err := net.Connect(id, peerID); err != nil { - log.Error("Error connecting a node to a peer!", "err", err) - return nil, err - } - } - - return ids, nil -} diff --git a/p2p/simulations/mocker_test.go b/p2p/simulations/mocker_test.go deleted file mode 100644 index 0112ee5cfd..0000000000 --- a/p2p/simulations/mocker_test.go +++ /dev/null @@ -1,174 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -// Package simulations simulates p2p networks. -// A mocker simulates starting and stopping real nodes in a network. -package simulations - -import ( - "encoding/json" - "net/http" - "net/url" - "strconv" - "sync" - "testing" - "time" - - "github.com/ethereum/go-ethereum/p2p/enode" -) - -func TestMocker(t *testing.T) { - //start the simulation HTTP server - _, s := testHTTPServer(t) - defer s.Close() - - //create a client - client := NewClient(s.URL) - - //start the network - err := client.StartNetwork() - if err != nil { - t.Fatalf("Could not start test network: %s", err) - } - //stop the network to terminate - defer func() { - err = client.StopNetwork() - if err != nil { - t.Fatalf("Could not stop test network: %s", err) - } - }() - - //get the list of available mocker types - resp, err := http.Get(s.URL + "/mocker") - if err != nil { - t.Fatalf("Could not get mocker list: %s", err) - } - defer resp.Body.Close() - - if resp.StatusCode != 200 { - t.Fatalf("Invalid Status Code received, expected 200, got %d", resp.StatusCode) - } - - //check the list is at least 1 in size - var mockerlist []string - err = json.NewDecoder(resp.Body).Decode(&mockerlist) - if err != nil { - t.Fatalf("Error decoding JSON mockerlist: %s", err) - } - - if len(mockerlist) < 1 { - t.Fatalf("No mockers available") - } - - nodeCount := 10 - var wg sync.WaitGroup - - events := make(chan *Event, 10) - var opts SubscribeOpts - sub, err := client.SubscribeNetwork(events, opts) - defer sub.Unsubscribe() - - // wait until all nodes are started and connected - // store every node up event in a map (value is irrelevant, mimic Set datatype) - nodemap := make(map[enode.ID]bool) - nodesComplete := false - connCount := 0 - wg.Add(1) - go func() { - defer wg.Done() - - for connCount < (nodeCount-1)*2 { - select { - case event := <-events: - if isNodeUp(event) { - //add the correspondent node ID to the map - nodemap[event.Node.Config.ID] = true - //this means all nodes got a nodeUp event, so we can continue the test - if len(nodemap) == nodeCount { - nodesComplete = true - } - } else if event.Conn != nil && nodesComplete { - connCount += 1 - } - case <-time.After(30 * time.Second): - t.Errorf("Timeout waiting for nodes being started up!") - return - } - } - }() - - //take the last element of the mockerlist as the default mocker-type to ensure one is enabled - mockertype := mockerlist[len(mockerlist)-1] - //still, use hardcoded "probabilistic" one if available ;) - for _, m := range mockerlist { - if m == "probabilistic" { - mockertype = m - break - } - } - //start the mocker with nodeCount number of nodes - resp, err = http.PostForm(s.URL+"/mocker/start", url.Values{"mocker-type": {mockertype}, "node-count": {strconv.Itoa(nodeCount)}}) - if err != nil { - t.Fatalf("Could not start mocker: %s", err) - } - resp.Body.Close() - if resp.StatusCode != 200 { - t.Fatalf("Invalid Status Code received for starting mocker, expected 200, got %d", resp.StatusCode) - } - - wg.Wait() - - //check there are nodeCount number of nodes in the network - nodesInfo, err := client.GetNodes() - if err != nil { - t.Fatalf("Could not get nodes list: %s", err) - } - - if len(nodesInfo) != nodeCount { - t.Fatalf("Expected %d number of nodes, got: %d", nodeCount, len(nodesInfo)) - } - - //stop the mocker - resp, err = http.Post(s.URL+"/mocker/stop", "", nil) - if err != nil { - t.Fatalf("Could not stop mocker: %s", err) - } - resp.Body.Close() - if resp.StatusCode != 200 { - t.Fatalf("Invalid Status Code received for stopping mocker, expected 200, got %d", resp.StatusCode) - } - - //reset the network - resp, err = http.Post(s.URL+"/reset", "", nil) - if err != nil { - t.Fatalf("Could not reset network: %s", err) - } - resp.Body.Close() - - //now the number of nodes in the network should be zero - nodesInfo, err = client.GetNodes() - if err != nil { - t.Fatalf("Could not get nodes list: %s", err) - } - - if len(nodesInfo) != 0 { - t.Fatalf("Expected empty list of nodes, got: %d", len(nodesInfo)) - } -} - -func isNodeUp(event *Event) bool { - return event.Node != nil && event.Node.Up() -} diff --git a/p2p/simulations/network.go b/p2p/simulations/network.go deleted file mode 100644 index 2eb8333cd6..0000000000 --- a/p2p/simulations/network.go +++ /dev/null @@ -1,1093 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package simulations - -import ( - "bytes" - "context" - "encoding/json" - "errors" - "fmt" - "math/rand" - "sync" - "time" - - "github.com/ethereum/go-ethereum/event" - "github.com/ethereum/go-ethereum/log" - "github.com/ethereum/go-ethereum/p2p" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/simulations/adapters" -) - -var DialBanTimeout = 200 * time.Millisecond - -// NetworkConfig defines configuration options for starting a Network -type NetworkConfig struct { - ID string `json:"id"` - DefaultService string `json:"default_service,omitempty"` -} - -// Network models a p2p simulation network which consists of a collection of -// simulated nodes and the connections which exist between them. -// -// The Network has a single NodeAdapter which is responsible for actually -// starting nodes and connecting them together. -// -// The Network emits events when nodes are started and stopped, when they are -// connected and disconnected, and also when messages are sent between nodes. -type Network struct { - NetworkConfig - - Nodes []*Node `json:"nodes"` - nodeMap map[enode.ID]int - - // Maps a node property string to node indexes of all nodes that hold this property - propertyMap map[string][]int - - Conns []*Conn `json:"conns"` - connMap map[string]int - - nodeAdapter adapters.NodeAdapter - events event.Feed - lock sync.RWMutex - quitc chan struct{} -} - -// NewNetwork returns a Network which uses the given NodeAdapter and NetworkConfig -func NewNetwork(nodeAdapter adapters.NodeAdapter, conf *NetworkConfig) *Network { - return &Network{ - NetworkConfig: *conf, - nodeAdapter: nodeAdapter, - nodeMap: make(map[enode.ID]int), - propertyMap: make(map[string][]int), - connMap: make(map[string]int), - quitc: make(chan struct{}), - } -} - -// Events returns the output event feed of the Network. -func (net *Network) Events() *event.Feed { - return &net.events -} - -// NewNodeWithConfig adds a new node to the network with the given config, -// returning an error if a node with the same ID or name already exists -func (net *Network) NewNodeWithConfig(conf *adapters.NodeConfig) (*Node, error) { - net.lock.Lock() - defer net.lock.Unlock() - - if conf.Reachable == nil { - conf.Reachable = func(otherID enode.ID) bool { - _, err := net.InitConn(conf.ID, otherID) - if err != nil && bytes.Compare(conf.ID.Bytes(), otherID.Bytes()) < 0 { - return false - } - return true - } - } - - // check the node doesn't already exist - if node := net.getNode(conf.ID); node != nil { - return nil, fmt.Errorf("node with ID %q already exists", conf.ID) - } - if node := net.getNodeByName(conf.Name); node != nil { - return nil, fmt.Errorf("node with name %q already exists", conf.Name) - } - - // if no services are configured, use the default service - if len(conf.Lifecycles) == 0 { - conf.Lifecycles = []string{net.DefaultService} - } - - // use the NodeAdapter to create the node - adapterNode, err := net.nodeAdapter.NewNode(conf) - if err != nil { - return nil, err - } - node := newNode(adapterNode, conf, false) - log.Trace("Node created", "id", conf.ID) - - nodeIndex := len(net.Nodes) - net.nodeMap[conf.ID] = nodeIndex - net.Nodes = append(net.Nodes, node) - - // Register any node properties with the network-level propertyMap - for _, property := range conf.Properties { - net.propertyMap[property] = append(net.propertyMap[property], nodeIndex) - } - - // emit a "control" event - net.events.Send(ControlEvent(node)) - - return node, nil -} - -// Config returns the network configuration -func (net *Network) Config() *NetworkConfig { - return &net.NetworkConfig -} - -// StartAll starts all nodes in the network -func (net *Network) StartAll() error { - for _, node := range net.Nodes { - if node.Up() { - continue - } - if err := net.Start(node.ID()); err != nil { - return err - } - } - return nil -} - -// StopAll stops all nodes in the network -func (net *Network) StopAll() error { - for _, node := range net.Nodes { - if !node.Up() { - continue - } - if err := net.Stop(node.ID()); err != nil { - return err - } - } - return nil -} - -// Start starts the node with the given ID -func (net *Network) Start(id enode.ID) error { - return net.startWithSnapshots(id, nil) -} - -// startWithSnapshots starts the node with the given ID using the give -// snapshots -func (net *Network) startWithSnapshots(id enode.ID, snapshots map[string][]byte) error { - net.lock.Lock() - defer net.lock.Unlock() - - node := net.getNode(id) - if node == nil { - return fmt.Errorf("node %v does not exist", id) - } - if node.Up() { - return fmt.Errorf("node %v already up", id) - } - log.Trace("Starting node", "id", id, "adapter", net.nodeAdapter.Name()) - if err := node.Start(snapshots); err != nil { - log.Warn("Node startup failed", "id", id, "err", err) - return err - } - node.SetUp(true) - log.Info("Started node", "id", id) - ev := NewEvent(node) - net.events.Send(ev) - - // subscribe to peer events - client, err := node.Client() - if err != nil { - return fmt.Errorf("error getting rpc client for node %v: %s", id, err) - } - events := make(chan *p2p.PeerEvent) - sub, err := client.Subscribe(context.Background(), "admin", events, "peerEvents") - if err != nil { - return fmt.Errorf("error getting peer events for node %v: %s", id, err) - } - go net.watchPeerEvents(id, events, sub) - return nil -} - -// watchPeerEvents reads peer events from the given channel and emits -// corresponding network events -func (net *Network) watchPeerEvents(id enode.ID, events chan *p2p.PeerEvent, sub event.Subscription) { - defer func() { - sub.Unsubscribe() - - // assume the node is now down - net.lock.Lock() - defer net.lock.Unlock() - - node := net.getNode(id) - if node == nil { - return - } - node.SetUp(false) - ev := NewEvent(node) - net.events.Send(ev) - }() - for { - select { - case event, ok := <-events: - if !ok { - return - } - peer := event.Peer - switch event.Type { - case p2p.PeerEventTypeAdd: - net.DidConnect(id, peer) - - case p2p.PeerEventTypeDrop: - net.DidDisconnect(id, peer) - - case p2p.PeerEventTypeMsgSend: - net.DidSend(id, peer, event.Protocol, *event.MsgCode) - - case p2p.PeerEventTypeMsgRecv: - net.DidReceive(peer, id, event.Protocol, *event.MsgCode) - } - - case err := <-sub.Err(): - if err != nil { - log.Error("Error in peer event subscription", "id", id, "err", err) - } - return - } - } -} - -// Stop stops the node with the given ID -func (net *Network) Stop(id enode.ID) error { - // IMPORTANT: node.Stop() must NOT be called under net.lock as - // node.Reachable() closure has a reference to the network and - // calls net.InitConn() what also locks the network. => DEADLOCK - // That holds until the following ticket is not resolved: - - var err error - - node, err := func() (*Node, error) { - net.lock.Lock() - defer net.lock.Unlock() - - node := net.getNode(id) - if node == nil { - return nil, fmt.Errorf("node %v does not exist", id) - } - if !node.Up() { - return nil, fmt.Errorf("node %v already down", id) - } - node.SetUp(false) - return node, nil - }() - if err != nil { - return err - } - - err = node.Stop() // must be called without net.lock - - net.lock.Lock() - defer net.lock.Unlock() - - if err != nil { - node.SetUp(true) - return err - } - log.Info("Stopped node", "id", id, "err", err) - ev := ControlEvent(node) - net.events.Send(ev) - return nil -} - -// Connect connects two nodes together by calling the "admin_addPeer" RPC -// method on the "one" node so that it connects to the "other" node -func (net *Network) Connect(oneID, otherID enode.ID) error { - net.lock.Lock() - defer net.lock.Unlock() - return net.connect(oneID, otherID) -} - -func (net *Network) connect(oneID, otherID enode.ID) error { - log.Debug("Connecting nodes with addPeer", "id", oneID, "other", otherID) - conn, err := net.initConn(oneID, otherID) - if err != nil { - return err - } - client, err := conn.one.Client() - if err != nil { - return err - } - net.events.Send(ControlEvent(conn)) - return client.Call(nil, "admin_addPeer", string(conn.other.Addr())) -} - -// Disconnect disconnects two nodes by calling the "admin_removePeer" RPC -// method on the "one" node so that it disconnects from the "other" node -func (net *Network) Disconnect(oneID, otherID enode.ID) error { - conn := net.GetConn(oneID, otherID) - if conn == nil { - return fmt.Errorf("connection between %v and %v does not exist", oneID, otherID) - } - if !conn.Up { - return fmt.Errorf("%v and %v already disconnected", oneID, otherID) - } - client, err := conn.one.Client() - if err != nil { - return err - } - net.events.Send(ControlEvent(conn)) - return client.Call(nil, "admin_removePeer", string(conn.other.Addr())) -} - -// DidConnect tracks the fact that the "one" node connected to the "other" node -func (net *Network) DidConnect(one, other enode.ID) error { - net.lock.Lock() - defer net.lock.Unlock() - conn, err := net.getOrCreateConn(one, other) - if err != nil { - return fmt.Errorf("connection between %v and %v does not exist", one, other) - } - if conn.Up { - return fmt.Errorf("%v and %v already connected", one, other) - } - conn.Up = true - net.events.Send(NewEvent(conn)) - return nil -} - -// DidDisconnect tracks the fact that the "one" node disconnected from the -// "other" node -func (net *Network) DidDisconnect(one, other enode.ID) error { - net.lock.Lock() - defer net.lock.Unlock() - conn := net.getConn(one, other) - if conn == nil { - return fmt.Errorf("connection between %v and %v does not exist", one, other) - } - if !conn.Up { - return fmt.Errorf("%v and %v already disconnected", one, other) - } - conn.Up = false - conn.initiated = time.Now().Add(-DialBanTimeout) - net.events.Send(NewEvent(conn)) - return nil -} - -// DidSend tracks the fact that "sender" sent a message to "receiver" -func (net *Network) DidSend(sender, receiver enode.ID, proto string, code uint64) error { - msg := &Msg{ - One: sender, - Other: receiver, - Protocol: proto, - Code: code, - Received: false, - } - net.events.Send(NewEvent(msg)) - return nil -} - -// DidReceive tracks the fact that "receiver" received a message from "sender" -func (net *Network) DidReceive(sender, receiver enode.ID, proto string, code uint64) error { - msg := &Msg{ - One: sender, - Other: receiver, - Protocol: proto, - Code: code, - Received: true, - } - net.events.Send(NewEvent(msg)) - return nil -} - -// GetNode gets the node with the given ID, returning nil if the node does not -// exist -func (net *Network) GetNode(id enode.ID) *Node { - net.lock.RLock() - defer net.lock.RUnlock() - return net.getNode(id) -} - -func (net *Network) getNode(id enode.ID) *Node { - i, found := net.nodeMap[id] - if !found { - return nil - } - return net.Nodes[i] -} - -// GetNodeByName gets the node with the given name, returning nil if the node does -// not exist -func (net *Network) GetNodeByName(name string) *Node { - net.lock.RLock() - defer net.lock.RUnlock() - return net.getNodeByName(name) -} - -func (net *Network) getNodeByName(name string) *Node { - for _, node := range net.Nodes { - if node.Config.Name == name { - return node - } - } - return nil -} - -// GetNodeIDs returns the IDs of all existing nodes -// Nodes can optionally be excluded by specifying their enode.ID. -func (net *Network) GetNodeIDs(excludeIDs ...enode.ID) []enode.ID { - net.lock.RLock() - defer net.lock.RUnlock() - - return net.getNodeIDs(excludeIDs) -} - -func (net *Network) getNodeIDs(excludeIDs []enode.ID) []enode.ID { - // Get all current nodeIDs - nodeIDs := make([]enode.ID, 0, len(net.nodeMap)) - for id := range net.nodeMap { - nodeIDs = append(nodeIDs, id) - } - - if len(excludeIDs) > 0 { - // Return the difference of nodeIDs and excludeIDs - return filterIDs(nodeIDs, excludeIDs) - } - return nodeIDs -} - -// GetNodes returns the existing nodes. -// Nodes can optionally be excluded by specifying their enode.ID. -func (net *Network) GetNodes(excludeIDs ...enode.ID) []*Node { - net.lock.RLock() - defer net.lock.RUnlock() - - return net.getNodes(excludeIDs) -} - -func (net *Network) getNodes(excludeIDs []enode.ID) []*Node { - if len(excludeIDs) > 0 { - nodeIDs := net.getNodeIDs(excludeIDs) - return net.getNodesByID(nodeIDs) - } - return net.Nodes -} - -// GetNodesByID returns existing nodes with the given enode.IDs. -// If a node doesn't exist with a given enode.ID, it is ignored. -func (net *Network) GetNodesByID(nodeIDs []enode.ID) []*Node { - net.lock.RLock() - defer net.lock.RUnlock() - - return net.getNodesByID(nodeIDs) -} - -func (net *Network) getNodesByID(nodeIDs []enode.ID) []*Node { - nodes := make([]*Node, 0, len(nodeIDs)) - for _, id := range nodeIDs { - node := net.getNode(id) - if node != nil { - nodes = append(nodes, node) - } - } - - return nodes -} - -// GetNodesByProperty returns existing nodes that have the given property string registered in their NodeConfig -func (net *Network) GetNodesByProperty(property string) []*Node { - net.lock.RLock() - defer net.lock.RUnlock() - - return net.getNodesByProperty(property) -} - -func (net *Network) getNodesByProperty(property string) []*Node { - nodes := make([]*Node, 0, len(net.propertyMap[property])) - for _, nodeIndex := range net.propertyMap[property] { - nodes = append(nodes, net.Nodes[nodeIndex]) - } - - return nodes -} - -// GetNodeIDsByProperty returns existing node's enode IDs that have the given property string registered in the NodeConfig -func (net *Network) GetNodeIDsByProperty(property string) []enode.ID { - net.lock.RLock() - defer net.lock.RUnlock() - - return net.getNodeIDsByProperty(property) -} - -func (net *Network) getNodeIDsByProperty(property string) []enode.ID { - nodeIDs := make([]enode.ID, 0, len(net.propertyMap[property])) - for _, nodeIndex := range net.propertyMap[property] { - node := net.Nodes[nodeIndex] - nodeIDs = append(nodeIDs, node.ID()) - } - - return nodeIDs -} - -// GetRandomUpNode returns a random node on the network, which is running. -func (net *Network) GetRandomUpNode(excludeIDs ...enode.ID) *Node { - net.lock.RLock() - defer net.lock.RUnlock() - return net.getRandomUpNode(excludeIDs...) -} - -// getRandomUpNode returns a random node on the network, which is running. -func (net *Network) getRandomUpNode(excludeIDs ...enode.ID) *Node { - return net.getRandomNode(net.getUpNodeIDs(), excludeIDs) -} - -func (net *Network) getUpNodeIDs() (ids []enode.ID) { - for _, node := range net.Nodes { - if node.Up() { - ids = append(ids, node.ID()) - } - } - return ids -} - -// GetRandomDownNode returns a random node on the network, which is stopped. -func (net *Network) GetRandomDownNode(excludeIDs ...enode.ID) *Node { - net.lock.RLock() - defer net.lock.RUnlock() - return net.getRandomNode(net.getDownNodeIDs(), excludeIDs) -} - -func (net *Network) getDownNodeIDs() (ids []enode.ID) { - for _, node := range net.Nodes { - if !node.Up() { - ids = append(ids, node.ID()) - } - } - return ids -} - -// GetRandomNode returns a random node on the network, regardless of whether it is running or not -func (net *Network) GetRandomNode(excludeIDs ...enode.ID) *Node { - net.lock.RLock() - defer net.lock.RUnlock() - return net.getRandomNode(net.getNodeIDs(nil), excludeIDs) // no need to exclude twice -} - -func (net *Network) getRandomNode(ids []enode.ID, excludeIDs []enode.ID) *Node { - filtered := filterIDs(ids, excludeIDs) - - l := len(filtered) - if l == 0 { - return nil - } - return net.getNode(filtered[rand.Intn(l)]) -} - -func filterIDs(ids []enode.ID, excludeIDs []enode.ID) []enode.ID { - exclude := make(map[enode.ID]bool) - for _, id := range excludeIDs { - exclude[id] = true - } - var filtered []enode.ID - for _, id := range ids { - if _, found := exclude[id]; !found { - filtered = append(filtered, id) - } - } - return filtered -} - -// GetConn returns the connection which exists between "one" and "other" -// regardless of which node initiated the connection -func (net *Network) GetConn(oneID, otherID enode.ID) *Conn { - net.lock.RLock() - defer net.lock.RUnlock() - return net.getConn(oneID, otherID) -} - -// GetOrCreateConn is like GetConn but creates the connection if it doesn't -// already exist -func (net *Network) GetOrCreateConn(oneID, otherID enode.ID) (*Conn, error) { - net.lock.Lock() - defer net.lock.Unlock() - return net.getOrCreateConn(oneID, otherID) -} - -func (net *Network) getOrCreateConn(oneID, otherID enode.ID) (*Conn, error) { - if conn := net.getConn(oneID, otherID); conn != nil { - return conn, nil - } - - one := net.getNode(oneID) - if one == nil { - return nil, fmt.Errorf("node %v does not exist", oneID) - } - other := net.getNode(otherID) - if other == nil { - return nil, fmt.Errorf("node %v does not exist", otherID) - } - conn := &Conn{ - One: oneID, - Other: otherID, - one: one, - other: other, - } - label := ConnLabel(oneID, otherID) - net.connMap[label] = len(net.Conns) - net.Conns = append(net.Conns, conn) - return conn, nil -} - -func (net *Network) getConn(oneID, otherID enode.ID) *Conn { - label := ConnLabel(oneID, otherID) - i, found := net.connMap[label] - if !found { - return nil - } - return net.Conns[i] -} - -// InitConn retrieves the connection model for the connection between -// peers 'oneID' and 'otherID', or creates a new one if it does not exist -// the order of nodes does not matter, i.e., Conn(i,j) == Conn(j, i) -// it checks if the connection is already up, and if the nodes are running -// NOTE: -// it also checks whether there has been recent attempt to connect the peers -// this is cheating as the simulation is used as an oracle and know about -// remote peers attempt to connect to a node which will then not initiate the connection -func (net *Network) InitConn(oneID, otherID enode.ID) (*Conn, error) { - net.lock.Lock() - defer net.lock.Unlock() - return net.initConn(oneID, otherID) -} - -func (net *Network) initConn(oneID, otherID enode.ID) (*Conn, error) { - if oneID == otherID { - return nil, fmt.Errorf("refusing to connect to self %v", oneID) - } - conn, err := net.getOrCreateConn(oneID, otherID) - if err != nil { - return nil, err - } - if conn.Up { - return nil, fmt.Errorf("%v and %v already connected", oneID, otherID) - } - if time.Since(conn.initiated) < DialBanTimeout { - return nil, fmt.Errorf("connection between %v and %v recently attempted", oneID, otherID) - } - - err = conn.nodesUp() - if err != nil { - log.Trace("Nodes not up", "err", err) - return nil, fmt.Errorf("nodes not up: %v", err) - } - log.Debug("Connection initiated", "id", oneID, "other", otherID) - conn.initiated = time.Now() - return conn, nil -} - -// Shutdown stops all nodes in the network and closes the quit channel -func (net *Network) Shutdown() { - for _, node := range net.Nodes { - log.Debug("Stopping node", "id", node.ID()) - if err := node.Stop(); err != nil { - log.Warn("Can't stop node", "id", node.ID(), "err", err) - } - } - close(net.quitc) -} - -// Reset resets all network properties: -// empties the nodes and the connection list -func (net *Network) Reset() { - net.lock.Lock() - defer net.lock.Unlock() - - //re-initialize the maps - net.connMap = make(map[string]int) - net.nodeMap = make(map[enode.ID]int) - net.propertyMap = make(map[string][]int) - - net.Nodes = nil - net.Conns = nil -} - -// Node is a wrapper around adapters.Node which is used to track the status -// of a node in the network -type Node struct { - adapters.Node `json:"-"` - - // Config if the config used to created the node - Config *adapters.NodeConfig `json:"config"` - - // up tracks whether or not the node is running - up bool - upMu *sync.RWMutex -} - -func newNode(an adapters.Node, ac *adapters.NodeConfig, up bool) *Node { - return &Node{Node: an, Config: ac, up: up, upMu: new(sync.RWMutex)} -} - -func (n *Node) copy() *Node { - configCpy := *n.Config - return newNode(n.Node, &configCpy, n.Up()) -} - -// Up returns whether the node is currently up (online) -func (n *Node) Up() bool { - n.upMu.RLock() - defer n.upMu.RUnlock() - return n.up -} - -// SetUp sets the up (online) status of the nodes with the given value -func (n *Node) SetUp(up bool) { - n.upMu.Lock() - defer n.upMu.Unlock() - n.up = up -} - -// ID returns the ID of the node -func (n *Node) ID() enode.ID { - return n.Config.ID -} - -// String returns a log-friendly string -func (n *Node) String() string { - return fmt.Sprintf("Node %v", n.ID().TerminalString()) -} - -// NodeInfo returns information about the node -func (n *Node) NodeInfo() *p2p.NodeInfo { - // avoid a panic if the node is not started yet - if n.Node == nil { - return nil - } - info := n.Node.NodeInfo() - info.Name = n.Config.Name - return info -} - -// MarshalJSON implements the json.Marshaler interface so that the encoded -// JSON includes the NodeInfo -func (n *Node) MarshalJSON() ([]byte, error) { - return json.Marshal(struct { - Info *p2p.NodeInfo `json:"info,omitempty"` - Config *adapters.NodeConfig `json:"config,omitempty"` - Up bool `json:"up"` - }{ - Info: n.NodeInfo(), - Config: n.Config, - Up: n.Up(), - }) -} - -// UnmarshalJSON implements json.Unmarshaler interface so that we don't lose Node.up -// status. IMPORTANT: The implementation is incomplete; we lose p2p.NodeInfo. -func (n *Node) UnmarshalJSON(raw []byte) error { - // TODO: How should we turn back NodeInfo into n.Node? - // Ticket: https://github.com/ethersphere/go-ethereum/issues/1177 - var node struct { - Config *adapters.NodeConfig `json:"config,omitempty"` - Up bool `json:"up"` - } - if err := json.Unmarshal(raw, &node); err != nil { - return err - } - *n = *newNode(nil, node.Config, node.Up) - return nil -} - -// Conn represents a connection between two nodes in the network -type Conn struct { - // One is the node which initiated the connection - One enode.ID `json:"one"` - - // Other is the node which the connection was made to - Other enode.ID `json:"other"` - - // Up tracks whether or not the connection is active - Up bool `json:"up"` - // Registers when the connection was grabbed to dial - initiated time.Time - - one *Node - other *Node -} - -// nodesUp returns whether both nodes are currently up -func (c *Conn) nodesUp() error { - if !c.one.Up() { - return fmt.Errorf("one %v is not up", c.One) - } - if !c.other.Up() { - return fmt.Errorf("other %v is not up", c.Other) - } - return nil -} - -// String returns a log-friendly string -func (c *Conn) String() string { - return fmt.Sprintf("Conn %v->%v", c.One.TerminalString(), c.Other.TerminalString()) -} - -// Msg represents a p2p message sent between two nodes in the network -type Msg struct { - One enode.ID `json:"one"` - Other enode.ID `json:"other"` - Protocol string `json:"protocol"` - Code uint64 `json:"code"` - Received bool `json:"received"` -} - -// String returns a log-friendly string -func (m *Msg) String() string { - return fmt.Sprintf("Msg(%d) %v->%v", m.Code, m.One.TerminalString(), m.Other.TerminalString()) -} - -// ConnLabel generates a deterministic string which represents a connection -// between two nodes, used to compare if two connections are between the same -// nodes -func ConnLabel(source, target enode.ID) string { - var first, second enode.ID - if bytes.Compare(source.Bytes(), target.Bytes()) > 0 { - first = target - second = source - } else { - first = source - second = target - } - return fmt.Sprintf("%v-%v", first, second) -} - -// Snapshot represents the state of a network at a single point in time and can -// be used to restore the state of a network -type Snapshot struct { - Nodes []NodeSnapshot `json:"nodes,omitempty"` - Conns []Conn `json:"conns,omitempty"` -} - -// NodeSnapshot represents the state of a node in the network -type NodeSnapshot struct { - Node Node `json:"node,omitempty"` - - // Snapshots is arbitrary data gathered from calling node.Snapshots() - Snapshots map[string][]byte `json:"snapshots,omitempty"` -} - -// Snapshot creates a network snapshot -func (net *Network) Snapshot() (*Snapshot, error) { - return net.snapshot(nil, nil) -} - -func (net *Network) SnapshotWithServices(addServices []string, removeServices []string) (*Snapshot, error) { - return net.snapshot(addServices, removeServices) -} - -func (net *Network) snapshot(addServices []string, removeServices []string) (*Snapshot, error) { - net.lock.Lock() - defer net.lock.Unlock() - snap := &Snapshot{ - Nodes: make([]NodeSnapshot, len(net.Nodes)), - } - for i, node := range net.Nodes { - snap.Nodes[i] = NodeSnapshot{Node: *node.copy()} - if !node.Up() { - continue - } - snapshots, err := node.Snapshots() - if err != nil { - return nil, err - } - snap.Nodes[i].Snapshots = snapshots - for _, addSvc := range addServices { - haveSvc := false - for _, svc := range snap.Nodes[i].Node.Config.Lifecycles { - if svc == addSvc { - haveSvc = true - break - } - } - if !haveSvc { - snap.Nodes[i].Node.Config.Lifecycles = append(snap.Nodes[i].Node.Config.Lifecycles, addSvc) - } - } - if len(removeServices) > 0 { - var cleanedServices []string - for _, svc := range snap.Nodes[i].Node.Config.Lifecycles { - haveSvc := false - for _, rmSvc := range removeServices { - if rmSvc == svc { - haveSvc = true - break - } - } - if !haveSvc { - cleanedServices = append(cleanedServices, svc) - } - } - snap.Nodes[i].Node.Config.Lifecycles = cleanedServices - } - } - for _, conn := range net.Conns { - if conn.Up { - snap.Conns = append(snap.Conns, *conn) - } - } - return snap, nil -} - -// longrunning tests may need a longer timeout -var snapshotLoadTimeout = 900 * time.Second - -// Load loads a network snapshot -func (net *Network) Load(snap *Snapshot) error { - // Start nodes. - for _, n := range snap.Nodes { - if _, err := net.NewNodeWithConfig(n.Node.Config); err != nil { - return err - } - if !n.Node.Up() { - continue - } - if err := net.startWithSnapshots(n.Node.Config.ID, n.Snapshots); err != nil { - return err - } - } - - // Prepare connection events counter. - allConnected := make(chan struct{}) // closed when all connections are established - done := make(chan struct{}) // ensures that the event loop goroutine is terminated - defer close(done) - - // Subscribe to event channel. - // It needs to be done outside of the event loop goroutine (created below) - // to ensure that the event channel is blocking before connect calls are made. - events := make(chan *Event) - sub := net.Events().Subscribe(events) - defer sub.Unsubscribe() - - go func() { - // Expected number of connections. - total := len(snap.Conns) - // Set of all established connections from the snapshot, not other connections. - // Key array element 0 is the connection One field value, and element 1 connection Other field. - connections := make(map[[2]enode.ID]struct{}, total) - - for { - select { - case e := <-events: - // Ignore control events as they do not represent - // connect or disconnect (Up) state change. - if e.Control { - continue - } - // Detect only connection events. - if e.Type != EventTypeConn { - continue - } - connection := [2]enode.ID{e.Conn.One, e.Conn.Other} - // Nodes are still not connected or have been disconnected. - if !e.Conn.Up { - // Delete the connection from the set of established connections. - // This will prevent false positive in case disconnections happen. - delete(connections, connection) - log.Warn("load snapshot: unexpected disconnection", "one", e.Conn.One, "other", e.Conn.Other) - continue - } - // Check that the connection is from the snapshot. - for _, conn := range snap.Conns { - if conn.One == e.Conn.One && conn.Other == e.Conn.Other { - // Add the connection to the set of established connections. - connections[connection] = struct{}{} - if len(connections) == total { - // Signal that all nodes are connected. - close(allConnected) - return - } - - break - } - } - case <-done: - // Load function returned, terminate this goroutine. - return - } - } - }() - - // Start connecting. - for _, conn := range snap.Conns { - if !net.GetNode(conn.One).Up() || !net.GetNode(conn.Other).Up() { - //in this case, at least one of the nodes of a connection is not up, - //so it would result in the snapshot `Load` to fail - continue - } - if err := net.Connect(conn.One, conn.Other); err != nil { - return err - } - } - - timeout := time.NewTimer(snapshotLoadTimeout) - defer timeout.Stop() - - select { - // Wait until all connections from the snapshot are established. - case <-allConnected: - // Make sure that we do not wait forever. - case <-timeout.C: - return errors.New("snapshot connections not established") - } - return nil -} - -// Subscribe reads control events from a channel and executes them -func (net *Network) Subscribe(events chan *Event) { - for { - select { - case event, ok := <-events: - if !ok { - return - } - if event.Control { - net.executeControlEvent(event) - } - case <-net.quitc: - return - } - } -} - -func (net *Network) executeControlEvent(event *Event) { - log.Trace("Executing control event", "type", event.Type, "event", event) - switch event.Type { - case EventTypeNode: - if err := net.executeNodeEvent(event); err != nil { - log.Error("Error executing node event", "event", event, "err", err) - } - case EventTypeConn: - if err := net.executeConnEvent(event); err != nil { - log.Error("Error executing conn event", "event", event, "err", err) - } - case EventTypeMsg: - log.Warn("Ignoring control msg event") - } -} - -func (net *Network) executeNodeEvent(e *Event) error { - if !e.Node.Up() { - return net.Stop(e.Node.ID()) - } - - if _, err := net.NewNodeWithConfig(e.Node.Config); err != nil { - return err - } - return net.Start(e.Node.ID()) -} - -func (net *Network) executeConnEvent(e *Event) error { - if e.Conn.Up { - return net.Connect(e.Conn.One, e.Conn.Other) - } - return net.Disconnect(e.Conn.One, e.Conn.Other) -} diff --git a/p2p/simulations/network_test.go b/p2p/simulations/network_test.go deleted file mode 100644 index 4ed1e4e6c3..0000000000 --- a/p2p/simulations/network_test.go +++ /dev/null @@ -1,872 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package simulations - -import ( - "bytes" - "context" - "encoding/json" - "fmt" - "reflect" - "strconv" - "strings" - "testing" - "time" - - "github.com/ethereum/go-ethereum/log" - "github.com/ethereum/go-ethereum/node" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/simulations/adapters" -) - -// Tests that a created snapshot with a minimal service only contains the expected connections -// and that a network when loaded with this snapshot only contains those same connections -func TestSnapshot(t *testing.T) { - // PART I - // create snapshot from ring network - - // this is a minimal service, whose protocol will take exactly one message OR close of connection before quitting - adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "noopwoop": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) { - return NewNoopService(nil), nil - }, - }) - - // create network - network := NewNetwork(adapter, &NetworkConfig{ - DefaultService: "noopwoop", - }) - // \todo consider making a member of network, set to true threadsafe when shutdown - runningOne := true - defer func() { - if runningOne { - network.Shutdown() - } - }() - - // create and start nodes - nodeCount := 20 - ids := make([]enode.ID, nodeCount) - for i := 0; i < nodeCount; i++ { - conf := adapters.RandomNodeConfig() - node, err := network.NewNodeWithConfig(conf) - if err != nil { - t.Fatalf("error creating node: %s", err) - } - if err := network.Start(node.ID()); err != nil { - t.Fatalf("error starting node: %s", err) - } - ids[i] = node.ID() - } - - // subscribe to peer events - evC := make(chan *Event) - sub := network.Events().Subscribe(evC) - defer sub.Unsubscribe() - - // connect nodes in a ring - // spawn separate thread to avoid deadlock in the event listeners - connectErr := make(chan error, 1) - go func() { - for i, id := range ids { - peerID := ids[(i+1)%len(ids)] - if err := network.Connect(id, peerID); err != nil { - connectErr <- err - return - } - } - }() - - // collect connection events up to expected number - ctx, cancel := context.WithTimeout(context.TODO(), time.Second) - defer cancel() - checkIds := make(map[enode.ID][]enode.ID) - connEventCount := nodeCount -OUTER: - for { - select { - case <-ctx.Done(): - t.Fatal(ctx.Err()) - case err := <-connectErr: - t.Fatal(err) - case ev := <-evC: - if ev.Type == EventTypeConn && !ev.Control { - // fail on any disconnect - if !ev.Conn.Up { - t.Fatalf("unexpected disconnect: %v -> %v", ev.Conn.One, ev.Conn.Other) - } - checkIds[ev.Conn.One] = append(checkIds[ev.Conn.One], ev.Conn.Other) - checkIds[ev.Conn.Other] = append(checkIds[ev.Conn.Other], ev.Conn.One) - connEventCount-- - log.Debug("ev", "count", connEventCount) - if connEventCount == 0 { - break OUTER - } - } - } - } - - // create snapshot of current network - snap, err := network.Snapshot() - if err != nil { - t.Fatal(err) - } - j, err := json.Marshal(snap) - if err != nil { - t.Fatal(err) - } - log.Debug("snapshot taken", "nodes", len(snap.Nodes), "conns", len(snap.Conns), "json", string(j)) - - // verify that the snap element numbers check out - if len(checkIds) != len(snap.Conns) || len(checkIds) != len(snap.Nodes) { - t.Fatalf("snapshot wrong node,conn counts %d,%d != %d", len(snap.Nodes), len(snap.Conns), len(checkIds)) - } - - // shut down sim network - runningOne = false - sub.Unsubscribe() - network.Shutdown() - - // check that we have all the expected connections in the snapshot - for nodid, nodConns := range checkIds { - for _, nodConn := range nodConns { - var match bool - for _, snapConn := range snap.Conns { - if snapConn.One == nodid && snapConn.Other == nodConn { - match = true - break - } else if snapConn.Other == nodid && snapConn.One == nodConn { - match = true - break - } - } - if !match { - t.Fatalf("snapshot missing conn %v -> %v", nodid, nodConn) - } - } - } - log.Info("snapshot checked") - - // PART II - // load snapshot and verify that exactly same connections are formed - - adapter = adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "noopwoop": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) { - return NewNoopService(nil), nil - }, - }) - network = NewNetwork(adapter, &NetworkConfig{ - DefaultService: "noopwoop", - }) - defer func() { - network.Shutdown() - }() - - // subscribe to peer events - // every node up and conn up event will generate one additional control event - // therefore multiply the count by two - evC = make(chan *Event, (len(snap.Conns)*2)+(len(snap.Nodes)*2)) - sub = network.Events().Subscribe(evC) - defer sub.Unsubscribe() - - // load the snapshot - // spawn separate thread to avoid deadlock in the event listeners - err = network.Load(snap) - if err != nil { - t.Fatal(err) - } - - // collect connection events up to expected number - ctx, cancel = context.WithTimeout(context.TODO(), time.Second*3) - defer cancel() - - connEventCount = nodeCount - -OuterTwo: - for { - select { - case <-ctx.Done(): - t.Fatal(ctx.Err()) - case ev := <-evC: - if ev.Type == EventTypeConn && !ev.Control { - // fail on any disconnect - if !ev.Conn.Up { - t.Fatalf("unexpected disconnect: %v -> %v", ev.Conn.One, ev.Conn.Other) - } - log.Debug("conn", "on", ev.Conn.One, "other", ev.Conn.Other) - checkIds[ev.Conn.One] = append(checkIds[ev.Conn.One], ev.Conn.Other) - checkIds[ev.Conn.Other] = append(checkIds[ev.Conn.Other], ev.Conn.One) - connEventCount-- - log.Debug("ev", "count", connEventCount) - if connEventCount == 0 { - break OuterTwo - } - } - } - } - - // check that we have all expected connections in the network - for _, snapConn := range snap.Conns { - var match bool - for nodid, nodConns := range checkIds { - for _, nodConn := range nodConns { - if snapConn.One == nodid && snapConn.Other == nodConn { - match = true - break - } else if snapConn.Other == nodid && snapConn.One == nodConn { - match = true - break - } - } - } - if !match { - t.Fatalf("network missing conn %v -> %v", snapConn.One, snapConn.Other) - } - } - - // verify that network didn't generate any other additional connection events after the ones we have collected within a reasonable period of time - ctx, cancel = context.WithTimeout(context.TODO(), time.Second) - defer cancel() - select { - case <-ctx.Done(): - case ev := <-evC: - if ev.Type == EventTypeConn { - t.Fatalf("Superfluous conn found %v -> %v", ev.Conn.One, ev.Conn.Other) - } - } - - // This test validates if all connections from the snapshot - // are created in the network. - t.Run("conns after load", func(t *testing.T) { - // Create new network. - n := NewNetwork( - adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "noopwoop": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) { - return NewNoopService(nil), nil - }, - }), - &NetworkConfig{ - DefaultService: "noopwoop", - }, - ) - defer n.Shutdown() - - // Load the same snapshot. - err := n.Load(snap) - if err != nil { - t.Fatal(err) - } - - // Check every connection from the snapshot - // if it is in the network, too. - for _, c := range snap.Conns { - if n.GetConn(c.One, c.Other) == nil { - t.Errorf("missing connection: %s -> %s", c.One, c.Other) - } - } - }) -} - -// TestNetworkSimulation creates a multi-node simulation network with each node -// connected in a ring topology, checks that all nodes successfully handshake -// with each other and that a snapshot fully represents the desired topology -func TestNetworkSimulation(t *testing.T) { - // create simulation network with 20 testService nodes - adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "test": newTestService, - }) - network := NewNetwork(adapter, &NetworkConfig{ - DefaultService: "test", - }) - defer network.Shutdown() - nodeCount := 20 - ids := make([]enode.ID, nodeCount) - for i := 0; i < nodeCount; i++ { - conf := adapters.RandomNodeConfig() - node, err := network.NewNodeWithConfig(conf) - if err != nil { - t.Fatalf("error creating node: %s", err) - } - if err := network.Start(node.ID()); err != nil { - t.Fatalf("error starting node: %s", err) - } - ids[i] = node.ID() - } - - // perform a check which connects the nodes in a ring (so each node is - // connected to exactly two peers) and then checks that all nodes - // performed two handshakes by checking their peerCount - action := func(_ context.Context) error { - for i, id := range ids { - peerID := ids[(i+1)%len(ids)] - if err := network.Connect(id, peerID); err != nil { - return err - } - } - return nil - } - check := func(ctx context.Context, id enode.ID) (bool, error) { - // check we haven't run out of time - select { - case <-ctx.Done(): - return false, ctx.Err() - default: - } - - // get the node - node := network.GetNode(id) - if node == nil { - return false, fmt.Errorf("unknown node: %s", id) - } - - // check it has exactly two peers - client, err := node.Client() - if err != nil { - return false, err - } - var peerCount int64 - if err := client.CallContext(ctx, &peerCount, "test_peerCount"); err != nil { - return false, err - } - switch { - case peerCount < 2: - return false, nil - case peerCount == 2: - return true, nil - default: - return false, fmt.Errorf("unexpected peerCount: %d", peerCount) - } - } - - timeout := 30 * time.Second - ctx, cancel := context.WithTimeout(context.Background(), timeout) - defer cancel() - - // trigger a check every 100ms - trigger := make(chan enode.ID) - go triggerChecks(ctx, ids, trigger, 100*time.Millisecond) - - result := NewSimulation(network).Run(ctx, &Step{ - Action: action, - Trigger: trigger, - Expect: &Expectation{ - Nodes: ids, - Check: check, - }, - }) - if result.Error != nil { - t.Fatalf("simulation failed: %s", result.Error) - } - - // take a network snapshot and check it contains the correct topology - snap, err := network.Snapshot() - if err != nil { - t.Fatal(err) - } - if len(snap.Nodes) != nodeCount { - t.Fatalf("expected snapshot to contain %d nodes, got %d", nodeCount, len(snap.Nodes)) - } - if len(snap.Conns) != nodeCount { - t.Fatalf("expected snapshot to contain %d connections, got %d", nodeCount, len(snap.Conns)) - } - for i, id := range ids { - conn := snap.Conns[i] - if conn.One != id { - t.Fatalf("expected conn[%d].One to be %s, got %s", i, id, conn.One) - } - peerID := ids[(i+1)%len(ids)] - if conn.Other != peerID { - t.Fatalf("expected conn[%d].Other to be %s, got %s", i, peerID, conn.Other) - } - } -} - -func createTestNodes(count int, network *Network) (nodes []*Node, err error) { - for i := 0; i < count; i++ { - nodeConf := adapters.RandomNodeConfig() - node, err := network.NewNodeWithConfig(nodeConf) - if err != nil { - return nil, err - } - if err := network.Start(node.ID()); err != nil { - return nil, err - } - - nodes = append(nodes, node) - } - - return nodes, nil -} - -func createTestNodesWithProperty(property string, count int, network *Network) (propertyNodes []*Node, err error) { - for i := 0; i < count; i++ { - nodeConf := adapters.RandomNodeConfig() - nodeConf.Properties = append(nodeConf.Properties, property) - - node, err := network.NewNodeWithConfig(nodeConf) - if err != nil { - return nil, err - } - if err := network.Start(node.ID()); err != nil { - return nil, err - } - - propertyNodes = append(propertyNodes, node) - } - - return propertyNodes, nil -} - -// TestGetNodeIDs creates a set of nodes and attempts to retrieve their IDs,. -// It then tests again whilst excluding a node ID from being returned. -// If a node ID is not returned, or more node IDs than expected are returned, the test fails. -func TestGetNodeIDs(t *testing.T) { - adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "test": newTestService, - }) - network := NewNetwork(adapter, &NetworkConfig{ - DefaultService: "test", - }) - defer network.Shutdown() - - numNodes := 5 - nodes, err := createTestNodes(numNodes, network) - if err != nil { - t.Fatalf("Could not create test nodes %v", err) - } - - gotNodeIDs := network.GetNodeIDs() - if len(gotNodeIDs) != numNodes { - t.Fatalf("Expected %d nodes, got %d", numNodes, len(gotNodeIDs)) - } - - for _, node1 := range nodes { - match := false - for _, node2ID := range gotNodeIDs { - if bytes.Equal(node1.ID().Bytes(), node2ID.Bytes()) { - match = true - break - } - } - - if !match { - t.Fatalf("A created node was not returned by GetNodes(), ID: %s", node1.ID().String()) - } - } - - excludeNodeID := nodes[3].ID() - gotNodeIDsExcl := network.GetNodeIDs(excludeNodeID) - if len(gotNodeIDsExcl) != numNodes-1 { - t.Fatalf("Expected one less node ID to be returned") - } - for _, nodeID := range gotNodeIDsExcl { - if bytes.Equal(excludeNodeID.Bytes(), nodeID.Bytes()) { - t.Fatalf("GetNodeIDs returned the node ID we excluded, ID: %s", nodeID.String()) - } - } -} - -// TestGetNodes creates a set of nodes and attempts to retrieve them again. -// It then tests again whilst excluding a node from being returned. -// If a node is not returned, or more nodes than expected are returned, the test fails. -func TestGetNodes(t *testing.T) { - adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "test": newTestService, - }) - network := NewNetwork(adapter, &NetworkConfig{ - DefaultService: "test", - }) - defer network.Shutdown() - - numNodes := 5 - nodes, err := createTestNodes(numNodes, network) - if err != nil { - t.Fatalf("Could not create test nodes %v", err) - } - - gotNodes := network.GetNodes() - if len(gotNodes) != numNodes { - t.Fatalf("Expected %d nodes, got %d", numNodes, len(gotNodes)) - } - - for _, node1 := range nodes { - match := false - for _, node2 := range gotNodes { - if bytes.Equal(node1.ID().Bytes(), node2.ID().Bytes()) { - match = true - break - } - } - - if !match { - t.Fatalf("A created node was not returned by GetNodes(), ID: %s", node1.ID().String()) - } - } - - excludeNodeID := nodes[3].ID() - gotNodesExcl := network.GetNodes(excludeNodeID) - if len(gotNodesExcl) != numNodes-1 { - t.Fatalf("Expected one less node to be returned") - } - for _, node := range gotNodesExcl { - if bytes.Equal(excludeNodeID.Bytes(), node.ID().Bytes()) { - t.Fatalf("GetNodes returned the node we excluded, ID: %s", node.ID().String()) - } - } -} - -// TestGetNodesByID creates a set of nodes and attempts to retrieve a subset of them by ID -// If a node is not returned, or more nodes than expected are returned, the test fails. -func TestGetNodesByID(t *testing.T) { - adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "test": newTestService, - }) - network := NewNetwork(adapter, &NetworkConfig{ - DefaultService: "test", - }) - defer network.Shutdown() - - numNodes := 5 - nodes, err := createTestNodes(numNodes, network) - if err != nil { - t.Fatalf("Could not create test nodes: %v", err) - } - - numSubsetNodes := 2 - subsetNodes := nodes[0:numSubsetNodes] - var subsetNodeIDs []enode.ID - for _, node := range subsetNodes { - subsetNodeIDs = append(subsetNodeIDs, node.ID()) - } - - gotNodesByID := network.GetNodesByID(subsetNodeIDs) - if len(gotNodesByID) != numSubsetNodes { - t.Fatalf("Expected %d nodes, got %d", numSubsetNodes, len(gotNodesByID)) - } - - for _, node1 := range subsetNodes { - match := false - for _, node2 := range gotNodesByID { - if bytes.Equal(node1.ID().Bytes(), node2.ID().Bytes()) { - match = true - break - } - } - - if !match { - t.Fatalf("A created node was not returned by GetNodesByID(), ID: %s", node1.ID().String()) - } - } -} - -// TestGetNodesByProperty creates a subset of nodes with a property assigned. -// GetNodesByProperty is then checked for correctness by comparing the nodes returned to those initially created. -// If a node with a property is not found, or more nodes than expected are returned, the test fails. -func TestGetNodesByProperty(t *testing.T) { - adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "test": newTestService, - }) - network := NewNetwork(adapter, &NetworkConfig{ - DefaultService: "test", - }) - defer network.Shutdown() - - numNodes := 3 - _, err := createTestNodes(numNodes, network) - if err != nil { - t.Fatalf("Failed to create nodes: %v", err) - } - - numPropertyNodes := 3 - propertyTest := "test" - propertyNodes, err := createTestNodesWithProperty(propertyTest, numPropertyNodes, network) - if err != nil { - t.Fatalf("Failed to create nodes with property: %v", err) - } - - gotNodesByProperty := network.GetNodesByProperty(propertyTest) - if len(gotNodesByProperty) != numPropertyNodes { - t.Fatalf("Expected %d nodes with a property, got %d", numPropertyNodes, len(gotNodesByProperty)) - } - - for _, node1 := range propertyNodes { - match := false - for _, node2 := range gotNodesByProperty { - if bytes.Equal(node1.ID().Bytes(), node2.ID().Bytes()) { - match = true - break - } - } - - if !match { - t.Fatalf("A created node with property was not returned by GetNodesByProperty(), ID: %s", node1.ID().String()) - } - } -} - -// TestGetNodeIDsByProperty creates a subset of nodes with a property assigned. -// GetNodeIDsByProperty is then checked for correctness by comparing the node IDs returned to those initially created. -// If a node ID with a property is not found, or more nodes IDs than expected are returned, the test fails. -func TestGetNodeIDsByProperty(t *testing.T) { - adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "test": newTestService, - }) - network := NewNetwork(adapter, &NetworkConfig{ - DefaultService: "test", - }) - defer network.Shutdown() - - numNodes := 3 - _, err := createTestNodes(numNodes, network) - if err != nil { - t.Fatalf("Failed to create nodes: %v", err) - } - - numPropertyNodes := 3 - propertyTest := "test" - propertyNodes, err := createTestNodesWithProperty(propertyTest, numPropertyNodes, network) - if err != nil { - t.Fatalf("Failed to created nodes with property: %v", err) - } - - gotNodeIDsByProperty := network.GetNodeIDsByProperty(propertyTest) - if len(gotNodeIDsByProperty) != numPropertyNodes { - t.Fatalf("Expected %d nodes with a property, got %d", numPropertyNodes, len(gotNodeIDsByProperty)) - } - - for _, node1 := range propertyNodes { - match := false - id1 := node1.ID() - for _, id2 := range gotNodeIDsByProperty { - if bytes.Equal(id1.Bytes(), id2.Bytes()) { - match = true - break - } - } - - if !match { - t.Fatalf("Not all nodes IDs were returned by GetNodeIDsByProperty(), ID: %s", id1.String()) - } - } -} - -func triggerChecks(ctx context.Context, ids []enode.ID, trigger chan enode.ID, interval time.Duration) { - tick := time.NewTicker(interval) - defer tick.Stop() - for { - select { - case <-tick.C: - for _, id := range ids { - select { - case trigger <- id: - case <-ctx.Done(): - return - } - } - case <-ctx.Done(): - return - } - } -} - -// \todo: refactor to implement snapshots -// and connect configuration methods once these are moved from -// swarm/network/simulations/connect.go -func BenchmarkMinimalService(b *testing.B) { - b.Run("ring/32", benchmarkMinimalServiceTmp) -} - -func benchmarkMinimalServiceTmp(b *testing.B) { - // stop timer to discard setup time pollution - args := strings.Split(b.Name(), "/") - nodeCount, err := strconv.ParseInt(args[2], 10, 16) - if err != nil { - b.Fatal(err) - } - - for i := 0; i < b.N; i++ { - // this is a minimal service, whose protocol will close a channel upon run of protocol - // making it possible to bench the time it takes for the service to start and protocol actually to be run - protoCMap := make(map[enode.ID]map[enode.ID]chan struct{}) - adapter := adapters.NewSimAdapter(adapters.LifecycleConstructors{ - "noopwoop": func(ctx *adapters.ServiceContext, stack *node.Node) (node.Lifecycle, error) { - protoCMap[ctx.Config.ID] = make(map[enode.ID]chan struct{}) - svc := NewNoopService(protoCMap[ctx.Config.ID]) - return svc, nil - }, - }) - - // create network - network := NewNetwork(adapter, &NetworkConfig{ - DefaultService: "noopwoop", - }) - defer network.Shutdown() - - // create and start nodes - ids := make([]enode.ID, nodeCount) - for i := 0; i < int(nodeCount); i++ { - conf := adapters.RandomNodeConfig() - node, err := network.NewNodeWithConfig(conf) - if err != nil { - b.Fatalf("error creating node: %s", err) - } - if err := network.Start(node.ID()); err != nil { - b.Fatalf("error starting node: %s", err) - } - ids[i] = node.ID() - } - - // ready, set, go - b.ResetTimer() - - // connect nodes in a ring - for i, id := range ids { - peerID := ids[(i+1)%len(ids)] - if err := network.Connect(id, peerID); err != nil { - b.Fatal(err) - } - } - - // wait for all protocols to signal to close down - ctx, cancel := context.WithTimeout(context.TODO(), time.Second) - defer cancel() - for nodid, peers := range protoCMap { - for peerid, peerC := range peers { - log.Debug("getting ", "node", nodid, "peer", peerid) - select { - case <-ctx.Done(): - b.Fatal(ctx.Err()) - case <-peerC: - } - } - } - } -} - -func TestNode_UnmarshalJSON(t *testing.T) { - t.Run("up_field", func(t *testing.T) { - runNodeUnmarshalJSON(t, casesNodeUnmarshalJSONUpField()) - }) - t.Run("config_field", func(t *testing.T) { - runNodeUnmarshalJSON(t, casesNodeUnmarshalJSONConfigField()) - }) -} - -func runNodeUnmarshalJSON(t *testing.T, tests []nodeUnmarshalTestCase) { - t.Helper() - for _, tt := range tests { - t.Run(tt.name, func(t *testing.T) { - var got *Node - if err := json.Unmarshal([]byte(tt.marshaled), &got); err != nil { - expectErrorMessageToContain(t, err, tt.wantErr) - got = nil - } - expectNodeEquality(t, got, tt.want) - }) - } -} - -type nodeUnmarshalTestCase struct { - name string - marshaled string - want *Node - wantErr string -} - -func expectErrorMessageToContain(t *testing.T, got error, want string) { - t.Helper() - if got == nil && want == "" { - return - } - - if got == nil && want != "" { - t.Errorf("error was expected, got: nil, want: %v", want) - return - } - - if !strings.Contains(got.Error(), want) { - t.Errorf( - "unexpected error message, got %v, want: %v", - want, - got, - ) - } -} - -func expectNodeEquality(t *testing.T, got, want *Node) { - t.Helper() - if !reflect.DeepEqual(got, want) { - t.Errorf("Node.UnmarshalJSON() = %v, want %v", got, want) - } -} - -func casesNodeUnmarshalJSONUpField() []nodeUnmarshalTestCase { - return []nodeUnmarshalTestCase{ - { - name: "empty json", - marshaled: "{}", - want: newNode(nil, nil, false), - }, - { - name: "a stopped node", - marshaled: "{\"up\": false}", - want: newNode(nil, nil, false), - }, - { - name: "a running node", - marshaled: "{\"up\": true}", - want: newNode(nil, nil, true), - }, - { - name: "invalid JSON value on valid key", - marshaled: "{\"up\": foo}", - wantErr: "invalid character", - }, - { - name: "invalid JSON key and value", - marshaled: "{foo: bar}", - wantErr: "invalid character", - }, - { - name: "bool value expected but got something else (string)", - marshaled: "{\"up\": \"true\"}", - wantErr: "cannot unmarshal string into Go struct", - }, - } -} - -func casesNodeUnmarshalJSONConfigField() []nodeUnmarshalTestCase { - // Don't do a big fuss around testing, as adapters.NodeConfig should - // handle it's own serialization. Just do a sanity check. - return []nodeUnmarshalTestCase{ - { - name: "Config field is omitted", - marshaled: "{}", - want: newNode(nil, nil, false), - }, - { - name: "Config field is nil", - marshaled: "{\"config\": null}", - want: newNode(nil, nil, false), - }, - { - name: "a non default Config field", - marshaled: "{\"config\":{\"name\":\"node_ecdd0\",\"port\":44665}}", - want: newNode(nil, &adapters.NodeConfig{Name: "node_ecdd0", Port: 44665}, false), - }, - } -} diff --git a/p2p/simulations/simulation.go b/p2p/simulations/simulation.go deleted file mode 100644 index ae62c42b9c..0000000000 --- a/p2p/simulations/simulation.go +++ /dev/null @@ -1,157 +0,0 @@ -// Copyright 2017 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package simulations - -import ( - "context" - "time" - - "github.com/ethereum/go-ethereum/p2p/enode" -) - -// Simulation provides a framework for running actions in a simulated network -// and then waiting for expectations to be met -type Simulation struct { - network *Network -} - -// NewSimulation returns a new simulation which runs in the given network -func NewSimulation(network *Network) *Simulation { - return &Simulation{ - network: network, - } -} - -// Run performs a step of the simulation by performing the step's action and -// then waiting for the step's expectation to be met -func (s *Simulation) Run(ctx context.Context, step *Step) (result *StepResult) { - result = newStepResult() - - result.StartedAt = time.Now() - defer func() { result.FinishedAt = time.Now() }() - - // watch network events for the duration of the step - stop := s.watchNetwork(result) - defer stop() - - // perform the action - if err := step.Action(ctx); err != nil { - result.Error = err - return - } - - // wait for all node expectations to either pass, error or timeout - nodes := make(map[enode.ID]struct{}, len(step.Expect.Nodes)) - for _, id := range step.Expect.Nodes { - nodes[id] = struct{}{} - } - for len(result.Passes) < len(nodes) { - select { - case id := <-step.Trigger: - // skip if we aren't checking the node - if _, ok := nodes[id]; !ok { - continue - } - - // skip if the node has already passed - if _, ok := result.Passes[id]; ok { - continue - } - - // run the node expectation check - pass, err := step.Expect.Check(ctx, id) - if err != nil { - result.Error = err - return - } - if pass { - result.Passes[id] = time.Now() - } - case <-ctx.Done(): - result.Error = ctx.Err() - return - } - } - - return -} - -func (s *Simulation) watchNetwork(result *StepResult) func() { - stop := make(chan struct{}) - done := make(chan struct{}) - events := make(chan *Event) - sub := s.network.Events().Subscribe(events) - go func() { - defer close(done) - defer sub.Unsubscribe() - for { - select { - case event := <-events: - result.NetworkEvents = append(result.NetworkEvents, event) - case <-stop: - return - } - } - }() - return func() { - close(stop) - <-done - } -} - -type Step struct { - // Action is the action to perform for this step - Action func(context.Context) error - - // Trigger is a channel which receives node ids and triggers an - // expectation check for that node - Trigger chan enode.ID - - // Expect is the expectation to wait for when performing this step - Expect *Expectation -} - -type Expectation struct { - // Nodes is a list of nodes to check - Nodes []enode.ID - - // Check checks whether a given node meets the expectation - Check func(context.Context, enode.ID) (bool, error) -} - -func newStepResult() *StepResult { - return &StepResult{ - Passes: make(map[enode.ID]time.Time), - } -} - -type StepResult struct { - // Error is the error encountered whilst running the step - Error error - - // StartedAt is the time the step started - StartedAt time.Time - - // FinishedAt is the time the step finished - FinishedAt time.Time - - // Passes are the timestamps of the successful node expectations - Passes map[enode.ID]time.Time - - // NetworkEvents are the network events which occurred during the step - NetworkEvents []*Event -} diff --git a/p2p/simulations/test.go b/p2p/simulations/test.go deleted file mode 100644 index 0edb07b127..0000000000 --- a/p2p/simulations/test.go +++ /dev/null @@ -1,150 +0,0 @@ -// Copyright 2018 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see . - -package simulations - -import ( - "testing" - - "github.com/ethereum/go-ethereum/p2p" - "github.com/ethereum/go-ethereum/p2p/enode" - "github.com/ethereum/go-ethereum/p2p/enr" - "github.com/ethereum/go-ethereum/rpc" -) - -// NoopService is the service that does not do anything -// but implements node.Service interface. -type NoopService struct { - c map[enode.ID]chan struct{} -} - -func NewNoopService(ackC map[enode.ID]chan struct{}) *NoopService { - return &NoopService{ - c: ackC, - } -} - -func (t *NoopService) Protocols() []p2p.Protocol { - return []p2p.Protocol{ - { - Name: "noop", - Version: 666, - Length: 0, - Run: func(peer *p2p.Peer, rw p2p.MsgReadWriter) error { - if t.c != nil { - t.c[peer.ID()] = make(chan struct{}) - close(t.c[peer.ID()]) - } - rw.ReadMsg() - return nil - }, - NodeInfo: func() interface{} { - return struct{}{} - }, - PeerInfo: func(id enode.ID) interface{} { - return struct{}{} - }, - Attributes: []enr.Entry{}, - }, - } -} - -func (t *NoopService) APIs() []rpc.API { - return []rpc.API{} -} - -func (t *NoopService) Start() error { - return nil -} - -func (t *NoopService) Stop() error { - return nil -} - -func VerifyRing(t *testing.T, net *Network, ids []enode.ID) { - t.Helper() - n := len(ids) - for i := 0; i < n; i++ { - for j := i + 1; j < n; j++ { - c := net.GetConn(ids[i], ids[j]) - if i == j-1 || (i == 0 && j == n-1) { - if c == nil { - t.Errorf("nodes %v and %v are not connected, but they should be", i, j) - } - } else { - if c != nil { - t.Errorf("nodes %v and %v are connected, but they should not be", i, j) - } - } - } - } -} - -func VerifyChain(t *testing.T, net *Network, ids []enode.ID) { - t.Helper() - n := len(ids) - for i := 0; i < n; i++ { - for j := i + 1; j < n; j++ { - c := net.GetConn(ids[i], ids[j]) - if i == j-1 { - if c == nil { - t.Errorf("nodes %v and %v are not connected, but they should be", i, j) - } - } else { - if c != nil { - t.Errorf("nodes %v and %v are connected, but they should not be", i, j) - } - } - } - } -} - -func VerifyFull(t *testing.T, net *Network, ids []enode.ID) { - t.Helper() - n := len(ids) - var connections int - for i, lid := range ids { - for _, rid := range ids[i+1:] { - if net.GetConn(lid, rid) != nil { - connections++ - } - } - } - - want := n * (n - 1) / 2 - if connections != want { - t.Errorf("wrong number of connections, got: %v, want: %v", connections, want) - } -} - -func VerifyStar(t *testing.T, net *Network, ids []enode.ID, centerIndex int) { - t.Helper() - n := len(ids) - for i := 0; i < n; i++ { - for j := i + 1; j < n; j++ { - c := net.GetConn(ids[i], ids[j]) - if i == centerIndex || j == centerIndex { - if c == nil { - t.Errorf("nodes %v and %v are not connected, but they should be", i, j) - } - } else { - if c != nil { - t.Errorf("nodes %v and %v are connected, but they should not be", i, j) - } - } - } - } -} diff --git a/p2p/transport_test.go b/p2p/transport_test.go index 24e06c5a06..01695cd3af 100644 --- a/p2p/transport_test.go +++ b/p2p/transport_test.go @@ -24,7 +24,7 @@ import ( "github.com/davecgh/go-spew/spew" "github.com/ethereum/go-ethereum/crypto" - "github.com/ethereum/go-ethereum/p2p/simulations/pipes" + "github.com/ethereum/go-ethereum/p2p/pipes" ) func TestProtocolHandshake(t *testing.T) {