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-rw-r--r--cmd/p2psim/main.go414
1 files changed, 414 insertions, 0 deletions
diff --git a/cmd/p2psim/main.go b/cmd/p2psim/main.go
new file mode 100644
index 000000000..56b74d135
--- /dev/null
+++ b/cmd/p2psim/main.go
@@ -0,0 +1,414 @@
+// 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/p2p"
+ "github.com/ethereum/go-ethereum/p2p/discover"
+ "github.com/ethereum/go-ethereum/p2p/simulations"
+ "github.com/ethereum/go-ethereum/p2p/simulations/adapters"
+ "github.com/ethereum/go-ethereum/rpc"
+ "gopkg.in/urfave/cli.v1"
+)
+
+var client *simulations.Client
+
+func main() {
+ app := cli.NewApp()
+ app.Usage = "devp2p simulation command-line client"
+ app.Flags = []cli.Flag{
+ cli.StringFlag{
+ Name: "api",
+ Value: "http://localhost:8888",
+ Usage: "simulation API URL",
+ EnvVar: "P2PSIM_API_URL",
+ },
+ }
+ app.Before = func(ctx *cli.Context) error {
+ client = simulations.NewClient(ctx.GlobalString("api"))
+ 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{
+ cli.BoolFlag{
+ Name: "current",
+ Usage: "get existing nodes and conns first",
+ },
+ cli.StringFlag{
+ Name: "filter",
+ Value: "",
+ Usage: "message filter",
+ },
+ },
+ },
+ {
+ 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{
+ cli.StringFlag{
+ Name: "name",
+ Value: "",
+ Usage: "node name",
+ },
+ cli.StringFlag{
+ Name: "services",
+ Value: "",
+ Usage: "node services (comma separated)",
+ },
+ cli.StringFlag{
+ Name: "key",
+ Value: "",
+ Usage: "node private key (hex encoded)",
+ },
+ },
+ },
+ {
+ Name: "show",
+ ArgsUsage: "<node>",
+ Usage: "show node information",
+ Action: showNode,
+ },
+ {
+ Name: "start",
+ ArgsUsage: "<node>",
+ Usage: "start a node",
+ Action: startNode,
+ },
+ {
+ Name: "stop",
+ ArgsUsage: "<node>",
+ Usage: "stop a node",
+ Action: stopNode,
+ },
+ {
+ Name: "connect",
+ ArgsUsage: "<node> <peer>",
+ Usage: "connect a node to a peer node",
+ Action: connectNode,
+ },
+ {
+ Name: "disconnect",
+ ArgsUsage: "<node> <peer>",
+ Usage: "disconnect a node from a peer node",
+ Action: disconnectNode,
+ },
+ {
+ Name: "rpc",
+ ArgsUsage: "<node> <method> [<args>]",
+ Usage: "call a node RPC method",
+ Action: rpcNode,
+ Flags: []cli.Flag{
+ cli.BoolFlag{
+ Name: "subscribe",
+ Usage: "method is a subscription",
+ },
+ },
+ },
+ },
+ },
+ }
+ app.Run(os.Args)
+}
+
+func showNetwork(ctx *cli.Context) error {
+ if len(ctx.Args()) != 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 len(ctx.Args()) != 0 {
+ return cli.ShowCommandHelp(ctx, ctx.Command.Name)
+ }
+ events := make(chan *simulations.Event)
+ sub, err := client.SubscribeNetwork(events, simulations.SubscribeOpts{
+ Current: ctx.Bool("current"),
+ Filter: ctx.String("filter"),
+ })
+ 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 len(ctx.Args()) != 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 len(ctx.Args()) != 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 len(ctx.Args()) != 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 len(ctx.Args()) != 0 {
+ return cli.ShowCommandHelp(ctx, ctx.Command.Name)
+ }
+ config := &adapters.NodeConfig{
+ Name: ctx.String("name"),
+ }
+ if key := ctx.String("key"); key != "" {
+ privKey, err := crypto.HexToECDSA(key)
+ if err != nil {
+ return err
+ }
+ config.ID = discover.PubkeyID(&privKey.PublicKey)
+ config.PrivateKey = privKey
+ }
+ if services := ctx.String("services"); services != "" {
+ config.Services = 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 {
+ args := ctx.Args()
+ if len(args) != 1 {
+ return cli.ShowCommandHelp(ctx, ctx.Command.Name)
+ }
+ nodeName := args[0]
+ 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 {
+ args := ctx.Args()
+ if len(args) != 1 {
+ return cli.ShowCommandHelp(ctx, ctx.Command.Name)
+ }
+ nodeName := args[0]
+ if err := client.StartNode(nodeName); err != nil {
+ return err
+ }
+ fmt.Fprintln(ctx.App.Writer, "Started", nodeName)
+ return nil
+}
+
+func stopNode(ctx *cli.Context) error {
+ args := ctx.Args()
+ if len(args) != 1 {
+ return cli.ShowCommandHelp(ctx, ctx.Command.Name)
+ }
+ nodeName := args[0]
+ if err := client.StopNode(nodeName); err != nil {
+ return err
+ }
+ fmt.Fprintln(ctx.App.Writer, "Stopped", nodeName)
+ return nil
+}
+
+func connectNode(ctx *cli.Context) error {
+ args := ctx.Args()
+ if len(args) != 2 {
+ return cli.ShowCommandHelp(ctx, ctx.Command.Name)
+ }
+ nodeName := args[0]
+ peerName := args[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 len(args) != 2 {
+ return cli.ShowCommandHelp(ctx, ctx.Command.Name)
+ }
+ nodeName := args[0]
+ peerName := args[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 len(args) < 2 {
+ return cli.ShowCommandHelp(ctx, ctx.Command.Name)
+ }
+ nodeName := args[0]
+ method := args[1]
+ rpcClient, err := client.RPCClient(context.Background(), nodeName)
+ if err != nil {
+ return err
+ }
+ if ctx.Bool("subscribe") {
+ return rpcSubscribe(rpcClient, ctx.App.Writer, method, args[3:]...)
+ }
+ var result interface{}
+ params := make([]interface{}, len(args[3:]))
+ for i, v := range args[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 {
+ parts := strings.SplitN(method, "_", 2)
+ namespace := parts[0]
+ method = parts[1]
+ 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
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-26 04:27:11 +0800