whisper: enable deadlines

Deadlines prevent wnode for working, so
they are only enabled when not in wnode
mode.

cmd/wnode/main.go

@@ -22,7 +22,6 @@ package main
 import (
 	"bufio"
 	"crypto/ecdsa"
-	crand "crypto/rand"
 	"crypto/sha512"
 	"encoding/binary"
 	"encoding/hex"
@@ -81,15 +80,14 @@ var (
 
 // cmd arguments
 var (
-	bootstrapMode  = flag.Bool("standalone", false, "boostrap node: don't initiate connection to peers, just wait for incoming connections")
-	forwarderMode  = flag.Bool("forwarder", false, "forwarder mode: only forward messages, neither encrypt nor decrypt messages")
+	bootstrapMode  = flag.Bool("standalone", false, "boostrap node: don't actively connect to peers, wait for incoming connections")
+	forwarderMode  = flag.Bool("forwarder", false, "forwarder mode: only forward messages, neither send nor decrypt messages")
 	mailServerMode = flag.Bool("mailserver", false, "mail server mode: delivers expired messages on demand")
 	requestMail    = flag.Bool("mailclient", false, "request expired messages from the bootstrap server")
 	asymmetricMode = flag.Bool("asym", false, "use asymmetric encryption")
 	generateKey    = flag.Bool("generatekey", false, "generate and show the private key")
 	fileExMode     = flag.Bool("fileexchange", false, "file exchange mode")
-	fileReader     = flag.Bool("filereader", false, "load and decrypt messages saved as files, display as plain text")
-	testMode       = flag.Bool("test", false, "use of predefined parameters for diagnostics (password, etc.)")
+	testMode       = flag.Bool("test", false, "use of predefined parameters for diagnostics")
 	echoMode       = flag.Bool("echo", false, "echo mode: prints some arguments for diagnostics")
 
 	argVerbosity = flag.Int("verbosity", int(log.LvlError), "log verbosity level")
@@ -106,7 +104,7 @@ var (
 	argIDFile  = flag.String("idfile", "", "file name with node id (private key)")
 	argEnode   = flag.String("boot", "", "bootstrap node you want to connect to (e.g. enode://e454......08d50@52.176.211.200:16428)")
 	argTopic   = flag.String("topic", "", "topic in hexadecimal format (e.g. 70a4beef)")
-	argSaveDir = flag.String("savedir", "", "directory where all incoming messages will be saved as files")
+	argSaveDir = flag.String("savedir", "", "directory where incoming messages will be saved as files")
 
 	useLibP2P = flag.Bool("libp2p", false, "Use libp2p as the protocol layer")
 )
@@ -115,7 +113,6 @@ func main() {
 	processArgs()
 	initialize()
 	run()
-	shutdown()
 }
 
 func processArgs() {
@@ -204,8 +201,6 @@ func initialize() {
 			if len(*argIP) == 0 {
 				argIP = scanLineA("Please enter your IP and port (e.g. 127.0.0.1:30348): ")
 			}
-		} else if *fileReader {
-			*bootstrapMode = true
 		} else {
 			if *argPort == 0 {
 				for {
@@ -249,6 +244,7 @@ func initialize() {
 	cfg := &whisper.Config{
 		MaxMessageSize:     uint32(*argMaxSize),
 		MinimumAcceptedPOW: *argPoW,
+		UseDeadlines:       *useLibP2P && *useDeadlines,
 	}
 
 	shh = whisper.New(cfg)

whisper/whisperv6/config.go

@@ -20,10 +20,12 @@ package whisperv6
 type Config struct {
 	MaxMessageSize     uint32  `toml:",omitempty"`
 	MinimumAcceptedPOW float64 `toml:",omitempty"`
+	UseDeadlines       bool    `toml:",omitempty"`
 }
 
 // DefaultConfig represents (shocker!) the default configuration.
 var DefaultConfig = Config{
 	MaxMessageSize:     DefaultMaxMessageSize,
 	MinimumAcceptedPOW: DefaultMinimumPoW,
+	UseDeadlines:       true,
 }

whisper/whisperv6/libp2p_glue.go

@@ -41,21 +41,36 @@ import (
 // LibP2PStream is a wrapper used to implement the MsgReadWriter
 // interface for libp2p's streams.
 type LibP2PStream struct {
+	UseDeadline bool
 	lp2pStream  inet.Stream
 	rlpStream   *rlp.Stream
 }
 
-func newLibp2pStream(lp2pStream inet.Stream) p2p.MsgReadWriter {
-	return &LibP2PStream{lp2pStream: lp2pStream, rlpStream: rlp.NewStream(bufio.NewReader(lp2pStream), 0)}
+func newLibp2pStream(server *LibP2PWhisperServer, lp2pStream inet.Stream) p2p.MsgReadWriter {
+	useDeadline, ok := server.whisper.settings.Load(useDeadlineIdx)
+	if !ok {
+		useDeadline = false
+	}
+	return &LibP2PStream{
+		UseDeadline: useDeadline.(bool),
+		lp2pStream:  lp2pStream,
+		rlpStream:   rlp.NewStream(bufio.NewReader(lp2pStream), 0),
+	}
 }
 
 // ReadMsg implements the MsgReadWriter interface to read messages
 // from lilbp2p streams.
 func (stream *LibP2PStream) ReadMsg() (p2p.Msg, error) {
+	if stream.UseDeadline {
+		stream.lp2pStream.SetReadDeadline(time.Now().Add(expirationCycle))
+	}
 	msgcode, err := stream.rlpStream.Uint()
 	if err != nil {
 		return p2p.Msg{}, fmt.Errorf("can't read message code: %v", err)
 	}
+	if stream.UseDeadline {
+		stream.lp2pStream.SetReadDeadline(time.Now().Add(expirationCycle))
+	}
 	_, size, err := stream.rlpStream.Kind()
 	if err != nil {
 		return p2p.Msg{}, fmt.Errorf("can't read message size: %v", err)
@@ -78,7 +93,9 @@ func (stream *LibP2PStream) ReadMsg() (p2p.Msg, error) {
 // WriteMsg implements the MsgReadWriter interface to write messages
 // to lilbp2p streams.
 func (stream *LibP2PStream) WriteMsg(msg p2p.Msg) error {
-	stream.lp2pStream.SetWriteDeadline(time.Now().Add(transmissionCycle))
+	if stream.UseDeadline {
+		stream.lp2pStream.SetWriteDeadline(time.Now().Add(expirationCycle))
+	}
 
 	if err := rlp.Encode(stream.lp2pStream, msg.Code); err != nil {
 		return err
@@ -194,7 +211,7 @@ func (server *LibP2PWhisperServer) connectToPeer(p *LibP2PPeer) error {
 	}
 
 	// Save the stream
-	lps := newLibp2pStream(s).(*LibP2PStream)
+	lps := newLibp2pStream(server, s).(*LibP2PStream)
 
 	p.connectionStream = lps
 	p.ws = p.connectionStream
@@ -221,7 +238,7 @@ func (server *LibP2PWhisperServer) Start() error {
 			}
 		}
 
-		lps := newLibp2pStream(stream).(*LibP2PStream)
+		lps := newLibp2pStream(server, stream).(*LibP2PStream)
 
 		// Unknown peer
 		if peer == nil {

whisper/whisperv6/whisper.go

@@ -54,6 +54,7 @@ const (
 	minPowToleranceIdx             // Minimal PoW tolerated by the whisper node for a limited time
 	bloomFilterIdx                 // Bloom filter for topics of interest for this node
 	bloomFilterToleranceIdx        // Bloom filter tolerated by the whisper node for a limited time
+	useDeadlineIdx                 // Indicates whether peer disconnect deadlines should be used (libp2p only)
 )
 
 // WhisperServer abstracts a server, which could be either DevP2p-based
@@ -121,6 +122,7 @@ func New(cfg *Config) *Whisper {
 	whisper.settings.Store(minPowIdx, cfg.MinimumAcceptedPOW)
 	whisper.settings.Store(maxMsgSizeIdx, cfg.MaxMessageSize)
 	whisper.settings.Store(overflowIdx, false)
+	whisper.settings.Store(useDeadlineIdx, cfg.UseDeadlines)
 
 	// p2p whisper sub protocol handler
 	whisper.protocol = p2p.Protocol{