Merge pull request #11 from D4-project/d4forward

add: [forwardredis] forward d4 redis queue to another d4 server

conf.sample/destination

@@ -1 +1 @@
-0.0.0.0:4443
+stdout

conf.sample/redis_d4

@@ -0,0 +1 @@
+localhost:6385/2

conf.sample/redis_queue

@@ -0,0 +1 @@
+analyzer:3:d42967c1-f7ad-464e-bbc7-4464c653d7a6

conf.sample/source

@@ -1 +1 @@
-stdin
+d4server

conf.sample/uuid

@@ -0,0 +1 @@
+1d940331-9fc9-4381-8fc9-3b624db66025

d4-goclient.go

@@ -22,6 +22,9 @@ import (
 
 	config "github.com/D4-project/d4-golang-utils/config"
 	uuid "github.com/D4-project/d4-golang-utils/crypto/hash"
+	"github.com/D4-project/d4-golang-utils/inputreader"
+	_ "github.com/D4-project/d4-golang-utils/inputreader"
+	"github.com/gomodule/redigo/redis"
 )
 
 const (
@@ -63,6 +66,7 @@ type (
 		ct             time.Duration
 		ce             bool
 		retry          time.Duration
+		rate          time.Duration
 		cc             bool
 		ca             x509.CertPool
 		d4error        uint8
@@ -71,6 +75,8 @@ type (
 		conf           d4params
 		mhb            *bytes.Buffer
 		mh             []byte
+		redisInputPool *redis.Pool
+		redisCon       redis.Conn
 	}
 
 	d4params struct {
@@ -81,27 +87,34 @@ type (
 		source      string
 		destination string
 		ttype       uint8
+		redisHost   string
+		redisPort   string
+		redisQueue  string
+		redisDB     int
 	}
 )
 
 var (
-	// verbose
+	// Verbose mode and logging
 	buf    bytes.Buffer
 	logger = log.New(&buf, "INFO: ", log.Lshortfile)
-	infof  = func(info string) {
+	debugger = log.New(&buf, "DEBUG: ", log.Lmicroseconds)
-		logger.Output(2, info)
+	debugf  = func(debug string) {
+		debugger.Println("", debug)
 	}
 
 	tmpct, _    = time.ParseDuration("5mn")
 	tmpcka, _   = time.ParseDuration("30s")
 	tmpretry, _ = time.ParseDuration("30s")
+	tmprate, _ = time.ParseDuration("200ms")
 
 	confdir = flag.String("c", "", "configuration directory")
-	debug   = flag.Bool("v", false, "Set to True, true, TRUE, 1, or t to enable verbose output on stdout")
+	debug   = flag.Bool("v", false, "Set to True, true, TRUE, 1, or t to enable verbose output on stdout - Don't use in production")
 	ce      = flag.Bool("ce", true, "Set to True, true, TRUE, 1, or t to enable TLS on network destination")
 	ct      = flag.Duration("ct", tmpct, "Set timeout in human format")
 	cka     = flag.Duration("cka", tmpcka, "Keep Alive time human format, 0 to disable")
-	retry   = flag.Duration("rt", tmpretry, "Time in human format before retry after connection failure, set to 0 to exit on failure")
+	retry   = flag.Duration("rt", tmpretry, "Rime in human format before retry after connection failure, set to 0 to exit on failure")
+	rate   = flag.Duration("rl", tmprate, "Rate limiter: time in human format before retry after EOF")
 	cc      = flag.Bool("cc", false, "Check TLS certificate against rootCA.crt")
 )
 
@@ -110,6 +123,15 @@ func main() {
 	var d4 d4S
 	d4p := &d4
 
+	// Setting up log file
+	f, err := os.OpenFile("d4-goclient.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
+	if err != nil {
+		log.Fatalf("error opening file: %v", err)
+	}
+	defer f.Close()
+	logger.SetOutput(f)
+	logger.Println("Init")
+
 	flag.Usage = func() {
 		fmt.Printf("d4 - d4 client\n")
 		fmt.Printf("Read data from the configured <source> and send it to <destination>\n")
@@ -147,11 +169,14 @@ func main() {
 	d4.cc = *cc
 	d4.cka = *cka
 	d4.retry = *retry
+	d4.rate = *rate
 
 	s := make(chan os.Signal, 1)
 	signal.Notify(s, os.Interrupt, os.Kill)
 	c := make(chan string)
-	k := make(chan string)
+
+	// Launching the Rate limiter
+    ratelimiter := time.Tick(d4.rate)
 
 	d4.mhb = bytes.NewBuffer(d4.mh)
 
@@ -167,39 +192,36 @@ func main() {
 				if err != nil {
 					panic(fmt.Sprintf("Cannot initiate session %s", err))
 				}
-				infof(fmt.Sprintf("Meta-Header sent: %d bytes", nread))
+				logger.Println(fmt.Sprintf("Meta-Header sent: %d bytes", nread))
 				d4p.dst.restoreHeader()
 			}
 			// copy routine
-			go d4Copy(d4p, c, k)
+			go d4Copy(d4p, c)
+			// Block until the rate limiter allow us to continue
+			<-ratelimiter
 		} else if d4.retry > 0 {
 			go func() {
-				infof(fmt.Sprintf("Sleeping for %.f seconds before retry...\n", d4.retry.Seconds()))
+				logger.Println(fmt.Sprintf("Sleeping for %.f seconds before retry...", d4.retry.Seconds()))
-				fmt.Printf("Sleeping for %.f seconds before retry...\n", d4.retry.Seconds())
 				time.Sleep(d4.retry)
 				c <- "done waiting"
 			}()
 		} else {
-			panic("Unrecoverable error without retry.")
+			exit(d4p, 1)
 		}
 
 		// Block until we catch an event
 		select {
-		case str := <-c:
+		case <-c:
-			infof(str)
 			continue
-		case str := <-k:
-			fmt.Println(str)
-			exit(d4p, 1)
 		case <-s:
-			fmt.Println(" Exiting")
+			logger.Println("Exiting")
 			exit(d4p, 0)
 		}
 	}
 }
 
 func exit(d4 *d4S, exitcode int) {
-	// Output logging before closing if debug is enabled
+	// Output debug info in the log before closing if debug is enabled
 	if *debug == true {
 		(*d4).debug = true
 		fmt.Print(&buf)
@@ -218,17 +240,14 @@ func set(d4 *d4S) bool {
 	return false
 }
 
-func d4Copy(d4 *d4S, c chan string, k chan string) {
+func d4Copy(d4 *d4S, c chan string) {
 	nread, err := io.CopyBuffer(&d4.dst, d4.src, d4.dst.pb)
+	// Always retry
 	if err != nil {
-		if (d4.retry.Seconds()) > 0 {
+		c <- fmt.Sprintf("D4copy: %s", err)
-			c <- fmt.Sprintf("%s", err)
 		return
 	}
-		k <- fmt.Sprintf("%s", err)
+	c <- fmt.Sprintf("EOF: Nread: %d", nread)
-		return
-	}
-	k <- fmt.Sprintf("EOF: Nread: %d", nread)
 	return
 }
 
@@ -243,6 +262,25 @@ func d4loadConfig(d4 *d4S) bool {
 	if len((*d4).conf.source) < 1 {
 		log.Fatal("Unsupported source")
 	}
+	if (*d4).conf.source == "d4server" {
+		// Parse Input Redis Config
+		tmp := config.ReadConfigFile(*confdir, "redis_d4")
+		ss := strings.Split(string(tmp), "/")
+		if len(ss) <= 1 {
+			log.Fatal("Missing Database in Redis input config: should be host:port/database_name")
+		}
+		(*d4).conf.redisDB, _ = strconv.Atoi(ss[1])
+		var ret bool
+		ret, ss[0] = config.IsNet(ss[0])
+		if ret {
+			sss := strings.Split(string(ss[0]), ":")
+			(*d4).conf.redisHost = sss[0]
+			(*d4).conf.redisPort = sss[1]
+		} else {
+			log.Fatal("Redis config error.")
+		}
+		(*d4).conf.redisQueue = string(config.ReadConfigFile(*confdir, "redis_queue"))
+	}
 	(*d4).conf.destination = string(readConfFile(d4, "destination"))
 	if len((*d4).conf.destination) < 1 {
 		log.Fatal("Unsupported Destination")
@@ -301,7 +339,7 @@ func d4loadConfig(d4 *d4S) bool {
 							panic(fmt.Sprintf("Cannot read Meta-Header file: %s", err))
 						} else {
 							if err := json.Compact((*d4).mhb, data[:count]); err != nil {
-								infof("Failed to compact meta header file")
+								logger.Println("Failed to compact meta header file")
 							}
 						}
 					} else {
@@ -357,6 +395,20 @@ func setReaderWriters(d4 *d4S) bool {
 	case "pcap":
 		f, _ := os.Open("capture.pcap")
 		(*d4).src = f
+	case "d4server":
+		// Create a new redis connection pool
+		(*d4).redisInputPool = newPool((*d4).conf.redisHost+":"+(*d4).conf.redisPort, 16)
+		var err error
+		(*d4).redisCon, err = (*d4).redisInputPool.Dial()
+		if err != nil {
+			logger.Println("Could not connect to d4 Redis")
+			return false
+		}
+		(*d4).src, err = inputreader.NewLPOPReader(&(*d4).redisCon, (*d4).conf.redisDB, (*d4).conf.redisQueue, int(time.Second*(*d4).retry))
+		if err != nil {
+			log.Printf("Could not create d4 Redis Descriptor %q \n", err)
+			return false
+		}
 	}
 	isn, dstnet := config.IsNet((*d4).conf.destination)
 	if isn {
@@ -377,7 +429,7 @@ func setReaderWriters(d4 *d4S) bool {
 		if (*d4).ce == true {
 			conn, errc := tls.DialWithDialer(&dial, "tcp", dstnet, &tlsc)
 			if errc != nil {
-				fmt.Println(errc)
+				logger.Println(errc)
 				return false
 			}
 			(*d4).dst = newD4Writer(conn, (*d4).conf.key)
@@ -412,7 +464,7 @@ func generateUUIDv4() []byte {
 	if err != nil {
 		log.Fatal(err)
 	}
-	infof(fmt.Sprintf("UUIDv4: %s\n", uuid))
+	logger.Println(fmt.Sprintf("UUIDv4: %s\n", uuid))
 	return uuid.Bytes()
 }
 
@@ -467,8 +519,8 @@ func (d4w *d4Writer) initHeader(d4 *d4S) bool {
 	// hmac is set to zero during hmac operations, so leave it alone
 	// init size of payload at 0
 	binary.LittleEndian.PutUint32(d4w.fb[58:62], uint32(0))
-	infof(fmt.Sprintf("Initialized a %d bytes header:\n", HDR_SIZE))
+	debugf(fmt.Sprintf("Initialized a %d bytes header:\n", HDR_SIZE))
-	infof(fmt.Sprintf("%b\n", d4w.fb[:HDR_SIZE]))
+	debugf(fmt.Sprintf("%b\n", d4w.fb[:HDR_SIZE]))
 	return true
 }
 
@@ -483,3 +535,13 @@ func (d4w *d4Writer) restoreHeader() bool {
 	d4w.fb[1] = 254
 	return true
 }
+
+func newPool(addr string, maxconn int) *redis.Pool {
+	return &redis.Pool{
+		MaxActive:   maxconn,
+		MaxIdle:     3,
+		IdleTimeout: 240 * time.Second,
+		// Dial or DialContext must be set. When both are set, DialContext takes precedence over Dial.
+		Dial: func() (redis.Conn, error) { return redis.Dial("tcp", addr) },
+	}
+}

go.mod

@@ -2,4 +2,7 @@ module github.com/D4-project/d4-goclient
 
 go 1.13
 
-require github.com/D4-project/d4-golang-utils v0.0.0-20200212134721-0ef9aada6f2e
+require (
+	github.com/D4-project/d4-golang-utils v0.1.3-0.20200408055630-2fd1cdf3ea38
+	github.com/gomodule/redigo v2.0.0+incompatible
+)

go.sum

@@ -1,4 +1,8 @@
-github.com/D4-project/d4-golang-utils v0.0.0-20200212134721-0ef9aada6f2e h1:yYTt4RS3K8+L7PUnw7Y8sT4+YuE3Rny42rx8kMOgDmc=
+github.com/D4-project/d4-golang-utils v0.1.2 h1:aLdvwIR2CFvIn2FnqPjbHxzLeo3ZL7YEyhCXRL6a9kQ=
-github.com/D4-project/d4-golang-utils v0.0.0-20200212134721-0ef9aada6f2e/go.mod h1:2rq8KBQnNNDocwc/49cnpaqoQA/komoSHKom7ynvqJc=
+github.com/D4-project/d4-golang-utils v0.1.2/go.mod h1:2rq8KBQnNNDocwc/49cnpaqoQA/komoSHKom7ynvqJc=
+github.com/D4-project/d4-golang-utils v0.1.3-0.20200408055630-2fd1cdf3ea38 h1:jMryCP4eEDOuNBtqDBAIJ0MNuypVaGnCgDq6c8XXLEs=
+github.com/D4-project/d4-golang-utils v0.1.3-0.20200408055630-2fd1cdf3ea38/go.mod h1:2rq8KBQnNNDocwc/49cnpaqoQA/komoSHKom7ynvqJc=
 github.com/gofrs/uuid v3.2.0+incompatible h1:y12jRkkFxsd7GpqdSZ+/KCs/fJbqpEXSGd4+jfEaewE=
 github.com/gofrs/uuid v3.2.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
+github.com/gomodule/redigo v2.0.0+incompatible h1:K/R+8tc58AaqLkqG2Ol3Qk+DR/TlNuhuh457pBFPtt0=
+github.com/gomodule/redigo v2.0.0+incompatible/go.mod h1:B4C85qUVwatsJoIUNIfCRsp7qO0iAmpGFZ4EELWSbC4=