Example #1
0
// Wait for the end of the alo so we can close connection nicely
func (p *Peer) WaitFins() {
	p.wgFin.Add(len(p.remote))
	fn := func(rp RemotePeer) {
		f := Finish{p.Id}
		err := poly.SUITE.Write(rp.Conn, &f)
		if err != nil {
			dbg.Fatal(p.String(), "could not send FIN to ", rp.String())
		}
		p.wgFin.Done()
	}
	p.ForRemotePeers(fn)
	dbg.Lvl2(p.String(), "waiting to send all FIN's packets")
	p.wgFin.Wait()
	// close all connections
	for _, rp := range p.remote {
		rp.Conn.Close()
	}
	dbg.Lvl2(p.String(), "close every connections")
	//for {
	//	f := <-p.finChan
	//	rp, ok := p.remote[f.Id]
	//	if !ok {
	//		dbg.Lvl2(p.Name, "received invalid FIN : wrong ID ", rp.Id, " ... ")
	//	} else {
	//		rp.Conn.Close()
	//		dbg.Lvl2(p.Name, "received FIN from ", rp.String(), " => closed connection")
	//	}
	//}
}
Example #2
0
func (sn *Node) CloseAll(view int) error {
	dbg.Lvl2(sn.Name(), "received CloseAll on", view)

	// At the leaves
	if len(sn.Children(view)) == 0 {
		dbg.Lvl2(sn.Name(), "in CloseAll is root leaf")
	} else {
		dbg.Lvl2(sn.Name(), "in CloseAll is calling", len(sn.Children(view)), "children")

		// Inform all children of announcement
		messgs := make([]coconet.BinaryMarshaler, sn.NChildren(view))
		for i := range messgs {
			sm := SigningMessage{
				Type:         CloseAll,
				View:         view,
				LastSeenVote: int(atomic.LoadInt64(&sn.LastSeenVote)),
			}
			messgs[i] = &sm
		}
		ctx := context.TODO()
		if err := sn.PutDown(ctx, view, messgs); err != nil {
			return err
		}
		sn.Close()
	}

	log.Fatal("Closing down shop")
	return nil
}
Example #3
0
// ComputeSharedSecret will make the exchange of dealers between
// the peers and will compute the sharedsecret at the end
func (p *Peer) ComputeSharedSecret() *poly.SharedSecret {
	// Construct the dealer
	dealerKey := cliutils.KeyPair(poly.SUITE)
	dealer := poly.NewDealer(p.info, &p.key, &dealerKey, p.pubKeys)
	// Construct the receiver
	receiver := poly.NewReceiver(p.info, &p.key)
	// add already its own dealer
	_, err := receiver.AddDealer(p.Id, dealer)
	if err != nil {
		dbg.Fatal(p.String(), "could not add its own dealer >< ABORT")
	}

	// Send the dealer struct TO every one
	err = p.SendToAll(dealer)
	dbg.Lvl2(p.Name, "sent its dealer to every peers. (err = ", err, ")")
	// Receive the dealer struct FROM every one
	// wait with a chan to get ALL dealers
	dealChan := make(chan *poly.Dealer)
	for _, rp := range p.remote {
		go func(rp RemotePeer) {
			d := new(poly.Dealer).UnmarshalInit(p.info)
			err := poly.SUITE.Read(rp.Conn, d)
			if err != nil {
				dbg.Fatal(p.Name, " received a strange dealer from ", rp.String())
			}
			dealChan <- d
		}(rp)
	}

	// wait to get all dealers
	dbg.Lvl3(p.Name, "wait to receive every other peer's dealer...")
	n := 0
	for {
		// get the dealer and add it
		d := <-dealChan
		dbg.Lvl3(p.Name, "collected one more dealer (count = ", n, ")")
		// TODO: get the response back to the dealer
		_, err := receiver.AddDealer(p.Id, d)
		if err != nil {
			dbg.Fatal(p.Name, "has error when adding the dealer : ", err)
		}
		n += 1
		// we get enough dealers to compute the shared secret
		if n == p.info.T-1 {
			dbg.Lvl2(p.Name, "received every Dealers")
			break
		}
	}

	sh, err := receiver.ProduceSharedSecret()
	if err != nil {
		dbg.Fatal(p.Name, "could not produce shared secret. Abort. (err ", err, ")")
	}
	dbg.Lvl2(p.Name, "produced shared secret !")
	return sh
}
Example #4
0
// WaitAcks will make  a peer  waits for all others peers to send an ACK to it
func (p *Peer) WaitACKs() {
	var wg sync.WaitGroup
	fn := func(rp RemotePeer) {
		a := Ack{}
		err := poly.SUITE.Read(rp.Conn, &a)
		if err != nil {
			dbg.Fatal(p.Name, "could not receive an ACK from ", rp.String(), " (err ", err, ")")
		}
		//p.ackChan <- a
		wg.Done()
	}
	wg.Add(len(p.remote))
	p.ForRemotePeers(fn)

	dbg.Lvl3(p.Name, "is waiting for acks ...")
	wg.Wait()
	dbg.Lvl2(p.String(), "received ALL ACKs")
	//n := 0
	//for {
	//	a := <-p.ackChan
	//	if a.Valid {
	//		n += 1
	//	}
	//	if n == p.info.N-1 {
	//		dbg.Lvl2(p.Name, "received all acks. Continue")
	//		break
	//	}
	//}
}
Example #5
0
// Get gets data from the connection.
// Returns io.EOF on an irrecoveralbe error.
// Returns given error if it is Temporary.
func (tc *TCPConn) Get(bum BinaryUnmarshaler) error {
	if tc.Closed() {
		dbg.Lvl3("tcpconn: get: connection closed")
		return ErrClosed
	}
	tc.encLock.Lock()
	for tc.dec == nil {
		tc.encLock.Unlock()
		return ErrNotEstablished
	}
	dec := tc.dec
	tc.encLock.Unlock()

	if Latency != 0 {
		time.Sleep(time.Duration(rand.Intn(Latency)) * time.Millisecond)
	}
	err := dec.Decode(bum)
	if err != nil {
		if IsTemporary(err) {
			return err
		}
		// if it is an irrecoverable error
		// close the channel and return that it has been closed
		if err != io.EOF && err.Error() != "read tcp4" {
			dbg.Lvl2("Couldn't decode packet at", tc.name, "error:", err)
		} else {
			dbg.Lvl3("Closing connection by EOF")
		}
		tc.Close()
		return ErrClosed
	}
	return err
}
Example #6
0
// ConnectTo will connect to the given host and start the SYN exchange (public key + id)
func (p *Peer) ConnectTo(host string) error {
	tick := time.NewTicker(ConnWaitRetry)
	count := 0
	for range tick.C {
		// connect
		conn, err := net.Dial("tcp", host)
		if err != nil {
			// we have tried too many times => abort
			if count == ConnRetry {
				tick.Stop()
				dbg.Fatal(p.Name, "could not connect to", host, " ", ConnRetry, "times. Abort.")
				// let's try again one more time
			} else {
				dbg.Lvl2(p.Name, "could not connect to", host, ". Retry in ", ConnWaitRetry.String())
				count += 1
			}
		}
		// handle successful connection
		dbg.Lvl3(p.Name, "has connected with peer ", host)
		tick.Stop()
		// start to syn with the respective peer
		go p.synWithPeer(conn)
		break
	}
	return nil
}
Example #7
0
// BroadcastSIgnature will broadcast the given signature to every other peer
// AND will retrieve the signature of every other peer also !
func (p *Peer) BroadcastSignature(s *poly.SchnorrSig) []*poly.SchnorrSig {
	arr := make([]*poly.SchnorrSig, 0, p.info.N)
	arr = append(arr, s)
	err := p.SendToAll(s)
	if err != nil {
		dbg.Fatal(p.String(), "could not sent to everyone its schnorr sig")
	}

	sigChan := make(chan *poly.SchnorrSig)
	fn := func(rp RemotePeer) {
		sch := new(poly.SchnorrSig).Init(p.info)
		err := poly.SUITE.Read(rp.Conn, sch)
		if err != nil {
			dbg.Fatal(p.String(), "could not decode schnorr sig from ", rp.String())
		}
		sigChan <- sch
	}
	// wait for every peers's schnorr sig
	p.ForRemotePeers(fn)
	n := 0
	for {
		sig := <-sigChan
		arr = append(arr, sig)
		n += 1
		if n == p.info.N-1 {
			dbg.Lvl2(p.String(), "received every other schnorr sig.")
			break
		}
	}

	return arr
}
Example #8
0
// Calculates a tree that is used for the timestampers
func (d *Deter) calculateGraph() {
	d.virt = d.virt[d.Config.Nloggers:]
	d.phys = d.phys[d.Config.Nloggers:]
	t, hostnames, depth, err := graphs.TreeFromList(d.virt, d.Config.Hpn, d.Config.Bf)
	dbg.Lvl2("Depth:", depth)
	dbg.Lvl2("Total hosts:", len(hostnames))
	total := d.Config.Nmachs * d.Config.Hpn
	if len(hostnames) != total {
		dbg.Lvl1("Only calculated", len(hostnames), "out of", total, "hosts - try changing number of",
			"machines or hosts per node")
		log.Fatal("Didn't calculate enough hosts")
	}

	// generate the configuration file from the tree
	cf := config.ConfigFromTree(t, hostnames)
	cfb, err := json.Marshal(cf)
	err = ioutil.WriteFile(d.DeployDir+"/tree.json", cfb, 0666)
	if err != nil {
		log.Fatal(err)
	}
}
Example #9
0
// WaitSYNs will wait until every peers has syn'd with this one
func (p *Peer) WaitSYNs() {
	for {
		s := <-p.synChan
		dbg.Lvl3(p.Name, " synChan received Syn id ", s.Id)
		_, ok := p.remote[s.Id]
		if !ok {
			dbg.Fatal(p.Name, "received syn'd notification of an unknown peer... ABORT")
		}
		if len(p.remote) == p.info.N-1 {
			dbg.Lvl2(p.Name, "is SYN'd with every one")
			break
		}
	}
}
Example #10
0
// SchnorrSigRoot will first generate a
// random shared secret, then start a new round
// It will wait for the partial sig of the peers
// to finally render a SchnorrSig struct
func (p *Peer) SchnorrSigRoot(msg []byte) *poly.SchnorrSig {
	// First, gen. a random secret
	random := p.ComputeSharedSecret()
	// launch the new round
	err := p.schnorr.NewRound(random, msg)
	if err != nil {
		dbg.Fatal(p.String(), "could not make a new round : ", err)
	}

	// compute its own share of the signature
	ps := p.schnorr.RevealPartialSig()
	// add its own
	p.schnorr.AddPartialSig(ps)

	// no need to send to all if you are the root
	//	p.SendToAll(ps)
	// then receive every partial sig
	sigChan := make(chan *poly.PartialSchnorrSig)
	fn := func(rp RemotePeer) {
		psig := new(poly.PartialSchnorrSig)
		err := poly.SUITE.Read(rp.Conn, psig)
		if err != nil {
			dbg.Fatal(p.String(), "could not decode PartialSig of ", rp.String())
		}
		sigChan <- psig
	}
	p.ForRemotePeers(fn)

	// wait for all partial sig to be received
	n := 0
	for {
		psig := <-sigChan
		err := p.schnorr.AddPartialSig(psig)
		if err != nil {
			dbg.Fatal(p.String(), "could not add the partial signature received : ", err)
		}
		n += 1
		if n == p.info.N-1 {
			dbg.Lvl2(p.String(), "received every other partial sig.")
			break
		}
	}

	sign, err := p.schnorr.SchnorrSig()
	if err != nil {
		dbg.Fatal(p.String(), "could not generate the global SchnorrSig", err)
	}
	return sign
}
Example #11
0
// hpn, bf, nmsgsG
func RunTest(t T) (RunStats, error) {
	// add timeout for 10 minutes?
	done := make(chan struct{})
	var rs RunStats
	cfg := &Config{
		t.nmachs, deploy_config.Nloggers, t.hpn, t.bf,
		-1, t.rate, t.rounds, t.failures, t.rFail, t.fFail,
		deploy_config.Debug, deploy_config.RootWait, t.app, deploy_config.Suite}

	dbg.Lvl1("Running test with parameters", cfg)
	dbg.Lvl1("Failures percent is", t.failures)

	deployP.Configure(cfg)
	deployP.Deploy()
	err := deployP.Start()
	if err != nil {
		log.Fatal(err)
		return rs, nil
	}

	// give it a while to start up
	time.Sleep(10 * time.Second)

	go func() {
		rs = Monitor(t.bf)
		deployP.Stop()
		dbg.Lvl2("Test complete:", rs)
		done <- struct{}{}
	}()

	// timeout the command if it takes too long
	select {
	case <-done:
		if isZero(rs.MinTime) || isZero(rs.MaxTime) || isZero(rs.AvgTime) || math.IsNaN(rs.Rate) || math.IsInf(rs.Rate, 0) {
			return rs, errors.New(fmt.Sprintf("unable to get good data: %+v", rs))
		}
		return rs, nil
		/* No time out for the moment
		case <-time.After(5 * time.Minute):
			return rs, errors.New("timed out")
		*/
	}
}
Example #12
0
// Dispatch-function for running either client or server (mode-parameter)
func Run(app *config.AppConfig, depl *deploy.Config) {

	// we must know who we are
	if app.Hostname == "" {
		log.Fatal("Hostname empty : Abort")
	}

	dbg.Lvl2(app.Hostname, "Starting to run as ", app.Mode)
	var err error
	hosts, err := ReadHostsJson("tree.json")
	if err != nil {
		log.Fatal("Error while reading JSON hosts file on", app.Hostname, ". Abort")
	}
	switch app.Mode {
	case "client":
		RunClient(depl)
	case "server":
		RunServer(hosts, app, depl)
	}
}
Example #13
0
func (sn *Node) StatusConnections(view int, am *AnnouncementMessage) error {
	dbg.Lvl2(sn.Name(), "StatusConnected", view)

	// Ask connection-count on all connected children
	messgs := make([]coconet.BinaryMarshaler, sn.NChildren(view))
	for i := range messgs {
		sm := SigningMessage{
			Type:         StatusConnections,
			View:         view,
			LastSeenVote: int(atomic.LoadInt64(&sn.LastSeenVote)),
			Am:           am}
		messgs[i] = &sm
	}

	ctx := context.TODO()
	if err := sn.PutDown(ctx, view, messgs); err != nil {
		return err
	}

	if len(sn.Children(view)) == 0 {
		sn.Commit(view, am.Round, nil)
	}
	return nil
}
Example #14
0
// Monitor monitors log aggregates results into RunStats
func Monitor(bf int) RunStats {
	dbg.Lvl1("Starting monitoring")
	defer dbg.Lvl1("Done monitoring")
retry_dial:
	ws, err := websocket.Dial(fmt.Sprintf("ws://localhost:%d/log", port), "", "http://localhost/")
	if err != nil {
		time.Sleep(1 * time.Second)
		goto retry_dial
	}
retry:
	// Get HTML of webpage for data (NHosts, Depth, ...)
	doc, err := goquery.NewDocument(fmt.Sprintf("http://localhost:%d/", port))
	if err != nil {
		dbg.Lvl4("unable to get log data: retrying:", err)
		time.Sleep(10 * time.Second)
		goto retry
	}
	nhosts := doc.Find("#numhosts").First().Text()
	dbg.Lvl4("hosts:", nhosts)
	depth := doc.Find("#depth").First().Text()
	dbg.Lvl4("depth:", depth)
	nh, err := strconv.Atoi(nhosts)
	if err != nil {
		log.Fatal("unable to convert hosts to be a number:", nhosts)
	}
	d, err := strconv.Atoi(depth)
	if err != nil {
		log.Fatal("unable to convert depth to be a number:", depth)
	}
	clientDone := false
	rootDone := false
	var rs RunStats
	rs.NHosts = nh
	rs.Depth = d
	rs.BF = bf

	var M, S float64
	k := float64(1)
	first := true
	for {
		var data []byte
		err := websocket.Message.Receive(ws, &data)
		if err != nil {
			// if it is an eof error than stop reading
			if err == io.EOF {
				dbg.Lvl4("websocket terminated before emitting EOF or terminating string")
				break
			}
			continue
		}
		if bytes.Contains(data, []byte("EOF")) || bytes.Contains(data, []byte("terminating")) {
			dbg.Lvl2(
				"EOF/terminating Detected: need forkexec to report and clients: rootDone", rootDone, "clientDone", clientDone)
		}
		if bytes.Contains(data, []byte("root_round")) {
			dbg.Lvl4("root_round msg received (clientDone = ", clientDone, ", rootDone = ", rootDone, ")")

			if clientDone || rootDone {
				dbg.Lvl4("Continuing searching data")
				// ignore after we have received our first EOF
				continue
			}
			var entry StatsEntry
			err := json.Unmarshal(data, &entry)
			if err != nil {
				log.Fatal("json unmarshalled improperly:", err)
			}
			if entry.Type != "root_round" {
				dbg.Lvl1("Wrong debugging message - ignoring")
				continue
			}
			dbg.Lvl4("root_round:", entry)
			if first {
				first = false
				dbg.Lvl4("Setting min-time to", entry.Time)
				rs.MinTime = entry.Time
				rs.MaxTime = entry.Time
			}
			if entry.Time < rs.MinTime {
				dbg.Lvl4("Setting min-time to", entry.Time)
				rs.MinTime = entry.Time
			} else if entry.Time > rs.MaxTime {
				rs.MaxTime = entry.Time
			}

			rs.AvgTime = ((rs.AvgTime * (k - 1)) + entry.Time) / k

			var tM = M
			M += (entry.Time - tM) / k
			S += (entry.Time - tM) * (entry.Time - M)
			k++
			rs.StdDev = math.Sqrt(S / (k - 1))
		} else if bytes.Contains(data, []byte("schnorr_round")) {

			var entry StatsEntry
			err := json.Unmarshal(data, &entry)
			if err != nil {
				log.Fatal("json unmarshalled improperly:", err)
			}
			if entry.Type != "schnorr_round" {
				dbg.Lvl1("Wrong debugging message - ignoring")
				continue
			}
			dbg.Lvl4("schnorr_round:", entry)
			if first {
				first = false
				dbg.Lvl4("Setting min-time to", entry.Time)
				rs.MinTime = entry.Time
				rs.MaxTime = entry.Time
			}
			if entry.Time < rs.MinTime {
				dbg.Lvl4("Setting min-time to", entry.Time)
				rs.MinTime = entry.Time
			} else if entry.Time > rs.MaxTime {
				rs.MaxTime = entry.Time
			}

			rs.AvgTime = ((rs.AvgTime * (k - 1)) + entry.Time) / k

			var tM = M
			M += (entry.Time - tM) / k
			S += (entry.Time - tM) * (entry.Time - M)
			k++
			rs.StdDev = math.Sqrt(S / (k - 1))
		} else if bytes.Contains(data, []byte("schnorr_end")) {
			break
		} else if bytes.Contains(data, []byte("forkexec")) {
			if rootDone {
				continue
			}
			var ss SysStats
			err := json.Unmarshal(data, &ss)
			if err != nil {
				log.Fatal("unable to unmarshal forkexec:", ss)
			}
			rs.SysTime = ss.SysTime
			rs.UserTime = ss.UserTime
			dbg.Lvl4("forkexec:", ss)
			rootDone = true
			dbg.Lvl2("Monitor() Forkexec msg received (clientDone = ", clientDone, ", rootDone = ", rootDone, ")")
			if clientDone {
				break
			}
		} else if bytes.Contains(data, []byte("client_msg_stats")) {
			if clientDone {
				continue
			}
			var cms ClientMsgStats
			err := json.Unmarshal(data, &cms)
			if err != nil {
				log.Fatal("unable to unmarshal client_msg_stats:", string(data))
			}
			// what do I want to keep out of the Client Message States
			// cms.Buckets stores how many were processed at time T
			// cms.RoundsAfter stores how many rounds delayed it was
			//
			// get the average delay (roundsAfter), max and min
			// get the total number of messages timestamped
			// get the average number of messages timestamped per second?
			avg, _, _, _ := ArrStats(cms.Buckets)
			// get the observed rate of processed messages
			// avg is how many messages per second, we want how many milliseconds between messages
			observed := avg / 1000 // set avg to messages per milliseconds
			observed = 1 / observed
			rs.Rate = observed
			rs.Times = cms.Times
			dbg.Lvl2("Monitor() Client Msg stats received (clientDone = ", clientDone, ",rootDone = ", rootDone, ")")
			clientDone = true
			if rootDone {
				break
			}
		}
	}
	return rs
}
Example #15
0
func main() {
	deter, err := deploy.ReadConfig()
	if err != nil {
		log.Fatal("Couldn't load config-file in forkexec:", err)
	}
	conf = deter.Config
	dbg.DebugVisible = conf.Debug

	flag.Parse()

	// connect with the logging server
	if logger != "" {
		// blocks until we can connect to the logger
		lh, err := logutils.NewLoggerHook(logger, physaddr, conf.App)
		if err != nil {
			log.WithFields(log.Fields{
				"file": logutils.File(),
			}).Fatalln("Error setting up logging server:", err)
		}
		log.AddHook(lh)
	}

	setup_deter()

	i := 0
	var wg sync.WaitGroup
	virts := physToServer[physaddr]
	if len(virts) > 0 {
		dbg.Lvl3("starting timestampers for", len(virts), "client(s)", virts)
		i = (i + 1) % len(loggerports)
		for _, name := range virts {
			dbg.Lvl4("Starting", name, "on", physaddr)
			wg.Add(1)
			go func(nameport string) {
				dbg.Lvl3("Running on", physaddr, "starting", nameport)
				defer wg.Done()

				args := []string{
					"-hostname=" + nameport,
					"-logger=" + logger,
					"-physaddr=" + physaddr,
					"-amroot=" + strconv.FormatBool(nameport == rootname),
					"-test_connect=" + strconv.FormatBool(testConnect),
					"-mode=server",
					"-app=" + conf.App,
				}

				dbg.Lvl3("Starting on", physaddr, "with args", args)
				cmdApp := exec.Command("./app", args...)
				//cmd.Stdout = log.StandardLogger().Writer()
				//cmd.Stderr = log.StandardLogger().Writer()
				cmdApp.Stdout = os.Stdout
				cmdApp.Stderr = os.Stderr
				dbg.Lvl3("fork-exec is running command:", args)
				err = cmdApp.Run()
				if err != nil {
					dbg.Lvl2("cmd run:", err)
				}

				// get CPU usage stats
				st := cmdApp.ProcessState.SystemTime()
				ut := cmdApp.ProcessState.UserTime()
				log.WithFields(log.Fields{
					"file":     logutils.File(),
					"type":     "forkexec",
					"systime":  st,
					"usertime": ut,
				}).Info("")

				dbg.Lvl2("Finished with Timestamper", physaddr)
			}(name)
		}
		dbg.Lvl3(physaddr, "Finished starting timestampers")
		wg.Wait()
	} else {
		dbg.Lvl2("No timestampers for", physaddr)
	}
	dbg.Lvl2(physaddr, "timestampers exited")
}
Example #16
0
// Dispatch-function for running either client or server (mode-parameter)
func Run(app *config.AppConfig, conf *deploy.Config) {
	// Do some common setup
	if app.Mode == "client" {
		app.Hostname = app.Name
	}
	dbg.Lvl3(app.Hostname, "Starting to run")
	if conf.Debug > 1 {
		sign.DEBUG = true
	}

	if app.Hostname == "" {
		log.Fatal("no hostname given", app.Hostname)
	}

	// load the configuration
	dbg.Lvl3("loading configuration for", app.Hostname)
	var hc *config.HostConfig
	var err error
	s := GetSuite(conf.Suite)
	opts := config.ConfigOptions{ConnType: "tcp", Host: app.Hostname, Suite: s}
	if conf.Failures > 0 || conf.FFail > 0 {
		opts.Faulty = true
	}
	hc, err = config.LoadConfig("tree.json", opts)
	if err != nil {
		fmt.Println(err)
		log.Fatal(err)
	}

	// Wait for everybody to be ready before going on
	ioutil.WriteFile("coll_stamp_up/up"+app.Hostname, []byte("started"), 0666)
	for {
		_, err := os.Stat("coll_stamp_up")
		if err == nil {
			files, _ := ioutil.ReadDir("coll_stamp_up")
			dbg.Lvl4(app.Hostname, "waiting for others to finish", len(files))
			time.Sleep(time.Second)
		} else {
			break
		}
	}
	dbg.Lvl2(app.Hostname, "thinks everybody's here")

	// set FailureRates
	if conf.Failures > 0 {
		for i := range hc.SNodes {
			hc.SNodes[i].FailureRate = conf.Failures
		}
	}

	// set root failures
	if conf.RFail > 0 {
		for i := range hc.SNodes {
			hc.SNodes[i].FailAsRootEvery = conf.RFail

		}
	}
	// set follower failures
	// a follower fails on %ffail round with failureRate probability
	for i := range hc.SNodes {
		hc.SNodes[i].FailAsFollowerEvery = conf.FFail
	}

	defer func() {
		dbg.Lvl1("Collective Signing", app.Hostname, "has terminated in mode", app.Mode)
	}()

	switch app.Mode {
	case "client":
		log.Panic("No client mode")
	case "server":
		RunServer(app, conf, hc)
	}
}
Example #17
0
func RunServer(hosts *config.HostsConfig, app *config.AppConfig, depl *deploy.Config) {
	s := config.GetSuite(depl.Suite)
	poly.SUITE = s
	poly.SECURITY = poly.MODERATE
	n := len(hosts.Hosts)

	info := poly.PolyInfo{
		N: n,
		R: n,
		T: n,
	}
	indexPeer := -1
	for i, h := range hosts.Hosts {
		if h == app.Hostname {
			indexPeer = i
			break
		}
	}
	if indexPeer == -1 {
		log.Fatal("Peer ", app.Hostname, "(", app.PhysAddr, ") did not find any match for its name.Abort")
	}

	start := time.Now()
	dbg.Lvl1("Creating new peer ", app.Hostname, "(", app.PhysAddr, ") ...")
	// indexPeer == 0 <==> peer is root
	p := NewPeer(indexPeer, app.Hostname, info, indexPeer == 0)

	// make it listen
	dbg.Lvl2("Peer", app.Hostname, "is now listening for incoming connections")
	go p.Listen()

	// then connect it to its successor in the list
	for _, h := range hosts.Hosts[indexPeer+1:] {
		dbg.Lvl2("Peer ", app.Hostname, " will connect to ", h)
		// will connect and SYN with the remote peer
		p.ConnectTo(h)
	}
	// Wait until this peer is connected / SYN'd with each other peer
	p.WaitSYNs()

	if p.IsRoot() {
		delta := time.Since(start)
		dbg.Lvl2(p.String(), "Connections accomplished in", delta)
		log.WithFields(log.Fields{
			"file":  logutils.File(),
			"type":  "schnorr_connect",
			"round": 0,
			"time":  delta,
		}).Info("")
	}

	// start to record
	start = time.Now()

	// Setup the schnorr system amongst peers
	p.SetupDistributedSchnorr()
	p.SendACKs()
	p.WaitACKs()
	dbg.Lvl1(p.String(), "completed Schnorr setup")

	// send setup time if we're root
	if p.IsRoot() {
		delta := time.Since(start)
		dbg.Lvl2(p.String(), "setup accomplished in ", delta)
		log.WithFields(log.Fields{
			"file":  logutils.File(),
			"type":  "schnorr_setup",
			"round": 0,
			"time":  delta,
		}).Info("")
	}

	for round := 0; round < depl.Rounds; round++ {
		if p.IsRoot() {
			dbg.Lvl2("Starting round", round)
		}

		// Then issue a signature !
		start = time.Now()
		msg := "hello world"

		// Only root calculates if it's OK and sends a log-message
		if p.IsRoot() {
			sig := p.SchnorrSigRoot([]byte(msg))
			err := p.VerifySchnorrSig(sig, []byte(msg))
			if err != nil {
				dbg.Fatal(p.String(), "could not verify schnorr signature :/ ", err)
			}

			dbg.Lvl2(p.String(), "verified the schnorr sig !")
			// record time
			delta := time.Since(start)
			dbg.Lvl2(p.String(), "signature done in ", delta)
			log.WithFields(log.Fields{
				"file":  logutils.File(),
				"type":  "schnorr_round",
				"round": round,
				"time":  delta,
			}).Info("")
		} else {
			// Compute the partial sig and send it to the root
			p.SchnorrSigPeer([]byte(msg))
		}
	}

	p.WaitFins()
	dbg.Lvl1(p.String(), "is leaving ...")

	if p.IsRoot() {
		log.WithFields(log.Fields{
			"file": logutils.File(),
			"type": "schnorr_end",
		}).Info("")
	}
}
Example #18
0
func RunServer(hostname, app string, rounds int, rootwait int, debug int, testConnect bool,
	failureRate, rFail, fFail int, logger, suite string) {
	dbg.Lvl3(hostname, "Starting to run")
	if debug > 1 {
		sign.DEBUG = true
	}

	// fmt.Println("EXEC TIMESTAMPER: " + hostname)
	if hostname == "" {
		log.Fatal("no hostname given")
	}

	// load the configuration
	//dbg.Lvl3("loading configuration")
	var hc *config.HostConfig
	var err error
	s := GetSuite(suite)
	opts := config.ConfigOptions{ConnType: "tcp", Host: hostname, Suite: s}
	if failureRate > 0 || fFail > 0 {
		opts.Faulty = true
	}

	configTime := time.Now()
	hc, err = config.LoadConfig("tree.json", opts)
	if err != nil {
		fmt.Println(err)
		log.Fatal(err)
	}
	dbg.Lvl3(hostname, "finished loading config after", time.Since(configTime))

	for i := range hc.SNodes {
		// set FailureRates
		if failureRate > 0 {
			hc.SNodes[i].FailureRate = failureRate
		}
		// set root failures
		if rFail > 0 {
			hc.SNodes[i].FailAsRootEvery = rFail
		}
		// set follower failures
		// a follower fails on %ffail round with failureRate probability
		hc.SNodes[i].FailAsFollowerEvery = fFail
	}

	// Wait for everybody to be ready before going on
	ioutil.WriteFile("coll_stamp_up/up"+hostname, []byte("started"), 0666)
	for {
		_, err := os.Stat("coll_stamp_up")
		if err == nil {
			dbg.Lvl4(hostname, "waiting for others to finish")
			time.Sleep(time.Second)
		} else {
			break
		}
	}
	dbg.Lvl3(hostname, "thinks everybody's here")

	err = hc.Run(app != "coll_sign", sign.MerkleTree, hostname)
	if err != nil {
		log.Fatal(err)
	}

	defer func(sn *sign.Node) {
		//log.Panicln("program has terminated:", hostname)
		dbg.Lvl1("Program timestamper has terminated:", hostname)
		sn.Close()
	}(hc.SNodes[0])

	stampers, _, err := RunTimestamper(hc, 0, hostname)
	// get rid of the hc information so it can be GC'ed
	hc = nil
	if err != nil {
		log.Fatal(err)
	}
	for _, s := range stampers {
		// only listen if this is the hostname specified
		if s.Name() == hostname {
			s.Logger = logger
			s.Hostname = hostname
			s.App = app
			if s.IsRoot(0) {
				dbg.Lvl1("Root timestamper at:", hostname, rounds, "Waiting: ", rootwait)
				// wait for the other nodes to get set up
				time.Sleep(time.Duration(rootwait) * time.Second)

				dbg.Lvl1("Starting root-round")
				s.Run("root", rounds)
				// dbg.Lvl3("\n\nROOT DONE\n\n")

			} else if !testConnect {
				dbg.Lvl2("Running regular timestamper on:", hostname)
				s.Run("regular", rounds)
				// dbg.Lvl1("\n\nREGULAR DONE\n\n")
			} else {
				// testing connection
				dbg.Lvl1("Running connection-test on:", hostname)
				s.Run("test_connect", rounds)
			}
		}
	}
}