Corenet API: Apply suggestions, cleanups

License: MIT
Signed-off-by: Łukasz Magiera <magik6k@gmail.com>

core/commands/corenet.go

@@ -9,6 +9,7 @@ import (
 	"text/tabwriter"
 
 	cmds "github.com/ipfs/go-ipfs/commands"
+	core "github.com/ipfs/go-ipfs/core"
 	corenet "github.com/ipfs/go-ipfs/core/corenet"
 
 	peerstore "gx/ipfs/QmNUVzEjq3XWJ89hegahPvyfJbTXgTaom48pLb7YBD9gHQ/go-libp2p-peerstore"
@@ -18,14 +19,13 @@ import (
 	manet "gx/ipfs/Qmf1Gq7N45Rpuw7ev47uWgH6dLPtdnvcMRNPkVBwqjLJg2/go-multiaddr-net"
 )
 
-// Command output types.
-type AppInfoOutput struct {
+type CorenetAppInfoOutput struct {
 	Protocol string
 	Address  string
 }
 
-type StreamInfoOutput struct {
-	HandlerId     string
+type CorenetStreamInfoOutput struct {
+	HandlerID     string
 	Protocol      string
 	LocalPeer     string
 	LocalAddress  string
@@ -34,11 +34,11 @@ type StreamInfoOutput struct {
 }
 
 type CorenetLsOutput struct {
-	Apps []AppInfoOutput
+	Apps []CorenetAppInfoOutput
 }
 
 type CorenetStreamsOutput struct {
-	Streams []StreamInfoOutput
+	Streams []CorenetStreamInfoOutput
 }
 
 // cnAppInfo holds information on a local application protocol listener service.
@@ -91,7 +91,7 @@ func (c *cnAppRegistry) Deregister(proto string) {
 
 // cnStreamInfo holds information on active incoming and outgoing protocol app streams.
 type cnStreamInfo struct {
-	handlerId uint64
+	handlerID uint64
 
 	protocol string
 
@@ -108,7 +108,7 @@ type cnStreamInfo struct {
 func (c *cnStreamInfo) Close() error {
 	c.local.Close()
 	c.remote.Close()
-	streams.Deregister(c.handlerId)
+	streams.Deregister(c.handlerID)
 	return nil
 }
 
@@ -116,19 +116,19 @@ func (c *cnStreamInfo) Close() error {
 type cnStreamRegistry struct {
 	streams []*cnStreamInfo
 
-	nextId uint64
+	nextID uint64
 }
 
 func (c *cnStreamRegistry) Register(streamInfo *cnStreamInfo) {
-	streamInfo.handlerId = c.nextId
+	streamInfo.handlerID = c.nextID
 	c.streams = append(c.streams, streamInfo)
-	c.nextId += 1
+	c.nextID++
 }
 
-func (c *cnStreamRegistry) Deregister(handlerId uint64) {
+func (c *cnStreamRegistry) Deregister(handlerID uint64) {
 	foundAt := -1
 	for i, s := range c.streams {
-		if s.handlerId == handlerId {
+		if s.handlerID == handlerID {
 			foundAt = i
 			break
 		}
@@ -145,7 +145,11 @@ var streams cnStreamRegistry
 
 var CorenetCmd = &cmds.Command{
 	Helptext: cmds.HelpText{
-		Tagline: "Application network streams.",
+		Tagline: "Libp2p stream mounting.",
+		ShortDescription: `
+Expose a local application to remote peers over libp2p
+
+Note: this command is experimental and subject to change as usecases and APIs are refined`,
 	},
 
 	Subcommands: map[string]*cmds.Command{
@@ -162,7 +166,7 @@ var CorenetLsCmd = &cmds.Command{
 		Tagline: "List active application protocol listeners.",
 	},
 	Options: []cmds.Option{
-		cmds.BoolOption("headers", "v", "Print table headers (HandlerId, Protocol, Local, Remote).").Default(false),
+		cmds.BoolOption("headers", "v", "Print table headers (HandlerID, Protocol, Local, Remote).").Default(false),
 	},
 	Run: func(req cmds.Request, res cmds.Response) {
 		n, err := req.InvocContext().GetNode()
@@ -171,6 +175,12 @@ var CorenetLsCmd = &cmds.Command{
 			return
 		}
 
+		err = checkEnabled(n)
+		if err != nil {
+			res.SetError(err, cmds.ErrNormal)
+			return
+		}
+
 		if !n.OnlineMode() {
 			res.SetError(errNotOnline, cmds.ErrClient)
 			return
@@ -179,7 +189,7 @@ var CorenetLsCmd = &cmds.Command{
 		output := &CorenetLsOutput{}
 
 		for _, a := range apps.apps {
-			output.Apps = append(output.Apps, AppInfoOutput{
+			output.Apps = append(output.Apps, CorenetAppInfoOutput{
 				Protocol: a.protocol,
 				Address:  a.address.String(),
 			})
@@ -210,10 +220,10 @@ var CorenetLsCmd = &cmds.Command{
 
 var CorenetStreamsCmd = &cmds.Command{
 	Helptext: cmds.HelpText{
-		Tagline: "List active application protocol connections.",
+		Tagline: "List active application protocol streams.",
 	},
 	Options: []cmds.Option{
-		cmds.BoolOption("headers", "v", "Print table headers (HandlerId, Protocol, Local, Remote).").Default(false),
+		cmds.BoolOption("headers", "v", "Print table headers (HandlerID, Protocol, Local, Remote).").Default(false),
 	},
 	Run: func(req cmds.Request, res cmds.Response) {
 		n, err := req.InvocContext().GetNode()
@@ -222,6 +232,12 @@ var CorenetStreamsCmd = &cmds.Command{
 			return
 		}
 
+		err = checkEnabled(n)
+		if err != nil {
+			res.SetError(err, cmds.ErrNormal)
+			return
+		}
+
 		if !n.OnlineMode() {
 			res.SetError(errNotOnline, cmds.ErrClient)
 			return
@@ -230,8 +246,8 @@ var CorenetStreamsCmd = &cmds.Command{
 		output := &CorenetStreamsOutput{}
 
 		for _, s := range streams.streams {
-			output.Streams = append(output.Streams, StreamInfoOutput{
-				HandlerId: strconv.FormatUint(s.handlerId, 10),
+			output.Streams = append(output.Streams, CorenetStreamInfoOutput{
+				HandlerID: strconv.FormatUint(s.handlerID, 10),
 
 				Protocol: s.protocol,
 
@@ -254,10 +270,10 @@ var CorenetStreamsCmd = &cmds.Command{
 			w := tabwriter.NewWriter(buf, 1, 2, 1, ' ', 0)
 			for _, stream := range list.Streams {
 				if headers {
-					fmt.Fprintln(w, "HandlerId\tProtocol\tLocal\tRemote")
+					fmt.Fprintln(w, "HandlerID\tProtocol\tLocal\tRemote")
 				}
 
-				fmt.Fprintf(w, "%s\t%s\t%s\t%s\n", stream.HandlerId, stream.Protocol, stream.LocalAddress, stream.RemotePeer)
+				fmt.Fprintf(w, "%s\t%s\t%s\t%s\n", stream.HandlerID, stream.Protocol, stream.LocalAddress, stream.RemotePeer)
 			}
 			w.Flush()
 
@@ -281,6 +297,12 @@ var CorenetListenCmd = &cmds.Command{
 			return
 		}
 
+		err = checkEnabled(n)
+		if err != nil {
+			res.SetError(err, cmds.ErrNormal)
+			return
+		}
+
 		if !n.OnlineMode() {
 			res.SetError(errNotOnline, cmds.ErrClient)
 			return
@@ -288,7 +310,7 @@ var CorenetListenCmd = &cmds.Command{
 
 		proto := "/app/" + req.Arguments()[0]
 		if checkProtoExists(n.PeerHost.Mux().Protocols(), proto) {
-			res.SetError(errors.New("Protocol handler already registered."), cmds.ErrNormal)
+			res.SetError(errors.New("protocol handler already registered"), cmds.ErrNormal)
 			return
 		}
 
@@ -317,7 +339,7 @@ var CorenetListenCmd = &cmds.Command{
 		apps.Register(&app)
 
 		// Successful response.
-		res.SetOutput(&AppInfoOutput{
+		res.SetOutput(&CorenetAppInfoOutput{
 			Protocol: proto,
 			Address:  addr.String(),
 		})
@@ -395,6 +417,12 @@ var CorenetDialCmd = &cmds.Command{
 			return
 		}
 
+		err = checkEnabled(n)
+		if err != nil {
+			res.SetError(err, cmds.ErrNormal)
+			return
+		}
+
 		if !n.OnlineMode() {
 			res.SetError(errNotOnline, cmds.ErrClient)
 			return
@@ -454,11 +482,11 @@ var CorenetDialCmd = &cmds.Command{
 			go doAccept(&app, remote, listener)
 
 		default:
-			res.SetError(errors.New("Unsupported protocol: "+lnet), cmds.ErrNormal)
+			res.SetError(errors.New("unsupported protocol: "+lnet), cmds.ErrNormal)
 			return
 		}
 
-		output := AppInfoOutput{
+		output := CorenetAppInfoOutput{
 			Protocol: app.protocol,
 			Address:  app.address.String(),
 		}
@@ -497,8 +525,8 @@ var CorenetCloseCmd = &cmds.Command{
 		Tagline: "Closes an active stream listener or client.",
 	},
 	Arguments: []cmds.Argument{
-		cmds.StringArg("HandlerId", false, false, "Application listener or client HandlerId"),
-		cmds.StringArg("Protocol", false, false, "Application listener or client HandlerId"),
+		cmds.StringArg("HandlerID", false, false, "Application listener or client HandlerID"),
+		cmds.StringArg("Protocol", false, false, "Application listener or client HandlerID"),
 	},
 	Options: []cmds.Option{
 		cmds.BoolOption("all", "a", "Close all streams and listeners.").Default(false),
@@ -510,6 +538,12 @@ var CorenetCloseCmd = &cmds.Command{
 			return
 		}
 
+		err = checkEnabled(n)
+		if err != nil {
+			res.SetError(err, cmds.ErrNormal)
+			return
+		}
+
 		if !n.OnlineMode() {
 			res.SetError(errNotOnline, cmds.ErrClient)
 			return
@@ -518,27 +552,27 @@ var CorenetCloseCmd = &cmds.Command{
 		closeAll, _, _ := req.Option("all").Bool()
 
 		var proto string
-		var handlerId uint64
+		var handlerID uint64
 
-		useHandlerId := false
+		useHandlerID := false
 
 		if !closeAll && len(req.Arguments()) == 0 {
-			res.SetError(errors.New("You must supply a handlerId or stream protocol."), cmds.ErrNormal)
+			res.SetError(errors.New(" handlerID nor stream protocol"), cmds.ErrNormal)
 			return
 
 		} else if !closeAll {
-			handlerId, err = strconv.ParseUint(req.Arguments()[0], 10, 64)
+			handlerID, err = strconv.ParseUint(req.Arguments()[0], 10, 64)
 			if err != nil {
 				proto = "/app/" + req.Arguments()[0]
 
 			} else {
-				useHandlerId = true
+				useHandlerID = true
 			}
 		}
 
-		if closeAll || useHandlerId {
+		if closeAll || useHandlerID {
 			for _, s := range streams.streams {
-				if !closeAll && handlerId != s.handlerId {
+				if !closeAll && handlerID != s.handlerID {
 					continue
 				}
 				s.Close()
@@ -548,7 +582,7 @@ var CorenetCloseCmd = &cmds.Command{
 			}
 		}
 
-		if closeAll || !useHandlerId {
+		if closeAll || !useHandlerID {
 			for _, a := range apps.apps {
 				if !closeAll && a.protocol != proto {
 					continue
@@ -564,3 +598,15 @@ var CorenetCloseCmd = &cmds.Command{
 		}
 	},
 }
+
+func checkEnabled(n *core.IpfsNode) error {
+	config, err := n.Repo.Config()
+	if err != nil {
+		return err
+	}
+
+	if !config.Experimental.Libp2pStreamMounting {
+		return errors.New("libp2p stream mounting not enabled")
+	}
+	return nil
+}

repo/config/experiments.go

 package config
 
 type Experiments struct {
-	FilestoreEnabled bool
-	ShardingEnabled  bool
+	FilestoreEnabled     bool
+	ShardingEnabled      bool
+	Libp2pStreamMounting bool
 }

test/sharness/t0180-corenet.sh

@@ -26,7 +26,16 @@ test_expect_success "test ports are closed" '
   (! (netstat -ln | grep "LISTEN" | grep ":10102 "))
 '
 
-test_expect_success 'start ipfs listener' '
+test_must_fail 'fail without config option being enabled' '
+  ipfsi 0 exp corenet ls
+'
+
+test_expect_success "enable filestore config setting" '
+  ipfsi 0 config --json Experimental.Libp2pStreamMounting true
+  ipfsi 1 config --json Experimental.Libp2pStreamMounting true
+'
+
+test_expect_success 'start corenet listener' '
   ipfsi 0 exp corenet listen corenet-test /ip4/127.0.0.1/tcp/10101 2>&1 > listener-stdouterr.log
 '