✨ add redis timeout

bouncer.go

@@ -15,6 +15,7 @@ import (
 	cache "github.com/maxlerebourg/crowdsec-bouncer-traefik-plugin/pkg/cache"
 	ip "github.com/maxlerebourg/crowdsec-bouncer-traefik-plugin/pkg/ip"
 	logger "github.com/maxlerebourg/crowdsec-bouncer-traefik-plugin/pkg/logger"
+	simpleredis "github.com/maxlerebourg/crowdsec-bouncer-traefik-plugin/pkg/redis"
 )
 
 const (
@@ -89,7 +90,7 @@ func New(ctx context.Context, next http.Handler, config *Config, name string) (h
 	logger.Init(config.LogLevel)
 	err := validateParams(config)
 	if err != nil {
-		logger.Info(fmt.Sprintf("%w", err))
+		logger.Info(err.Error())
 		return nil, err
 	}
 
@@ -141,16 +142,22 @@ func (bouncer *Bouncer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 
 	remoteHost, err := ip.GetRemoteIP(req, bouncer.poolStrategy, bouncer.customHeader)
 	if err != nil {
-		logger.Info(fmt.Sprintf("%w", err))
+		logger.Info(err.Error())
 		bouncer.next.ServeHTTP(rw, req)
 		return
 	}
 	logger.Debug(fmt.Sprintf("ServeHTTP ip:%v", remoteHost))
 
+	healthy := crowdsecStreamHealthy
 	if bouncer.crowdsecMode != noneMode {
 		isBanned, err := cache.GetDecision(remoteHost)
-		if err == nil {
+		if err != nil {
-			logger.Debug(fmt.Sprintf("ServeHTTP cacheHit isBanned:%v", isBanned))
+			logger.Debug(err.Error())
+			if err.Error() == simpleredis.RedisUnreachable {
+				healthy = false
+			}
+		} else  {
+			logger.Debug(fmt.Sprintf("ServeHTTP cache:hit isBanned:%v", isBanned))
 			if isBanned {
 				rw.WriteHeader(http.StatusForbidden)
 			} else {
@@ -162,7 +169,7 @@ func (bouncer *Bouncer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 
 	// Right here if we cannot join the stream we forbid the request to go on.
 	if bouncer.crowdsecMode == streamMode {
-		if crowdsecStreamHealthy {
+		if healthy {
 			bouncer.next.ServeHTTP(rw, req)
 		} else {
 			rw.WriteHeader(http.StatusForbidden)
@@ -229,7 +236,7 @@ func handleNoStreamCache(bouncer *Bouncer, rw http.ResponseWriter, req *http.Req
 	}
 	body, err := crowdsecQuery(bouncer, routeURL.String())
 	if err != nil {
-		logger.Info(fmt.Sprintf("%w", err))
+		logger.Info(err.Error())
 		rw.WriteHeader(http.StatusForbidden)
 		return
 	}
@@ -286,7 +293,7 @@ func handleStreamCache(bouncer *Bouncer) {
 	}
 	body, err := crowdsecQuery(bouncer, streamRouteURL.String())
 	if err != nil {
-		logger.Info(fmt.Sprintf("%w", err))
+		logger.Info(err.Error())
 		crowdsecStreamHealthy = false
 		return
 	}

exemples/redis-cache/docker-compose.redis.yml

@@ -43,6 +43,7 @@ services:
       # crowdseclapikey must be uniq to the middleware attached to the service
       - "traefik.http.middlewares.crowdsec1.plugin.bouncer.crowdseclapikey=40796d93c2958f9e58345514e67740e5"
       - "traefik.http.middlewares.crowdsec1.plugin.bouncer.rediscacheenabled=true"
+      - "traefik.http.middlewares.crowdsec1.plugin.bouncer.loglevel=DEBUG"
 
   whoami2:
     image: 4206969/spiderfoot

go.mod

@@ -1,7 +1,5 @@
 module github.com/maxlerebourg/crowdsec-bouncer-traefik-plugin
 
-go 1.17
+go 1.18
 
 require github.com/leprosus/golang-ttl-map v1.1.7
-
-require github.com/tehnerd/goUtils v0.0.0-20150515130609-5a2d8fb2ded8 // indirect

go.sum

@@ -1,4 +1,2 @@
 github.com/leprosus/golang-ttl-map v1.1.7 h1:cF4AAFDDnJTFSV+/42sKLhmMluvLdRlCGS2UaifH6UM=
 github.com/leprosus/golang-ttl-map v1.1.7/go.mod h1:4QWHJPeVBbrkhOhXdhCv9IEiyj/YzkO04/iexy4vSe0=
-github.com/tehnerd/goUtils v0.0.0-20150515130609-5a2d8fb2ded8 h1:/b777evAfRRdUJHasZLgQ/w8D/s1HtbaeDXsCVsV0B0=
-github.com/tehnerd/goUtils v0.0.0-20150515130609-5a2d8fb2ded8/go.mod h1:UuuqaOb+pZOxJZtjF1mBWTo8HYa7HQCbNkwUEaG9uU0=

pkg/cache/cache.go

@@ -27,7 +27,7 @@ func getDecisionLocalCache(clientIP string) (bool, error) {
 	if isCached && isValid && len(bannedString) > 0 {
 		return bannedString == cacheBannedValue, nil
 	}
-	return false, fmt.Errorf("no cache data")
+	return false, fmt.Errorf("cache:miss")
 }
 
 func setDecisionLocalCache(clientIP string, value string, duration int64) {
@@ -46,7 +46,7 @@ func getDecisionRedisCache(clientIP string) (bool, error) {
 	if err == nil && len(bannedString) > 0 {
 		return bannedString == cacheBannedValue, nil
 	}
-	return false, fmt.Errorf("no cache data")
+	return false, err
 }
 
 func setDecisionRedisCache(clientIP string, value string, duration int64) {

pkg/redis/redis.go

@@ -11,6 +11,12 @@ import (
 	logger "github.com/maxlerebourg/crowdsec-bouncer-traefik-plugin/pkg/logger"
 )
 
+const (
+	RedisUnreachable = "redis:unreachable"
+	RedisMiss = "redis:miss"
+	RedisTimeout = "redis:timeout"
+)
+
 type RedisCmd struct {
 	Command  string
 	Name     string
@@ -34,8 +40,10 @@ func genRedisArray(params ...[]byte) []byte {
 }
 
 func askRedis(hostnamePort string, cmd RedisCmd, channel chan RedisCmd) {
-	conn, err := net.Dial("tcp", hostnamePort)
+	dialer := net.Dialer{Timeout: 2 * time.Second}
+	conn, err := dialer.Dial("tcp", hostnamePort)
 	if err != nil {
+		channel <- RedisCmd{Error: fmt.Errorf(RedisUnreachable)}
 		return
 	}
 	defer conn.Close()
@@ -47,24 +55,24 @@ func askRedis(hostnamePort string, cmd RedisCmd, channel chan RedisCmd) {
 	case "SET":
 		data := genRedisArray([]byte("SET"), []byte(cmd.Name), []byte(cmd.Data), []byte("EX"), []byte(fmt.Sprintf("%v", cmd.Duration)))
 		writer.PrintfLine(string(data))
-		logger.Debug("Redis set")
+		logger.Debug("redis:set")
 	case "DEL":
 		data := genRedisArray([]byte("DEL"), []byte(cmd.Name))
 		writer.PrintfLine(string(data))
-		logger.Debug("Redis del")
+		logger.Debug("redis:del")
 	case "GET":
 		data := genRedisArray([]byte("GET"), []byte(cmd.Name))
 		writer.PrintfLine(string(data))
-		logger.Debug("Redis get")
+		logger.Debug("redis:get")
 		for {
 			select {
 			case <-time.After(time.Second * 1):
-				channel <- RedisCmd{Error: fmt.Errorf("timeout")}
+				channel <- RedisCmd{Error: fmt.Errorf(RedisTimeout)}
 				return
 			default:
 				read, _ := reader.ReadLineBytes()
 				if string(read) != "$1" {
-					channel <- RedisCmd{Error: fmt.Errorf("miss")}
+					channel <- RedisCmd{Error: fmt.Errorf(RedisMiss)}
 					return
 				}
 				read, _ = reader.ReadLineBytes()

vendor/github.com/tehnerd/goUtils/netutils/netutils.go

@@ -1,525 +0,0 @@
-package netutils
-
-import (
-	"math/rand"
-	"net"
-	"strconv"
-	"strings"
-	"sync"
-	//"sync/atomic"
-	"time"
-)
-
-//Receive msg from tcp socket and send it as a []byte to readChan
-func ReadFromTCP2(sock *net.TCPConn, msgBuf []byte, readChan chan []byte,
-	feedbackChanFromSocket chan int) {
-	loop := 1
-	for loop == 1 {
-		bytes, err := sock.Read(msgBuf)
-		if err != nil {
-			feedbackChanFromSocket <- 1
-			loop = 0
-			continue
-		}
-		b := make([]byte, 0)
-		b = append(b, msgBuf[:bytes]...)
-		readChan <- b
-	}
-}
-
-//Receive msg from tcp socket and send it as a []byte to readChan
-func ReadFromTCP(sock *net.TCPConn, msgBuf []byte, readChan chan []byte,
-	feedbackChanFromSocket chan int) {
-	feedbackToSocket := make(chan bool)
-	feedbackFromSocket := make(chan bool)
-	reuseBufferChan := make(chan []byte, 1)
-	go readFromTCP(sock, readChan, feedbackFromSocket,
-		feedbackToSocket, reuseBufferChan)
-	go func() {
-		<-feedbackFromSocket
-		feedbackChanFromSocket <- 1
-	}()
-}
-
-/*simple write to TCP, for oneway connections only (no communitcation w/ "read" part of the socket
-in terms of error propogation)*/
-func WriteToTCPw2(sock *net.TCPConn, writeChan chan []byte,
-	feedbackChan chan int) {
-	loop := 1
-	for loop == 1 {
-		select {
-		case msg := <-writeChan:
-			_, err := sock.Write(msg)
-			if err != nil {
-				feedbackChan <- 1
-				continue
-			}
-		case <-feedbackChan:
-			loop = 0
-		}
-	}
-}
-
-/*simple write to TCP, for oneway connections only (no communitcation w/ "read" part of the socket
-in terms of error propogation)*/
-func WriteToTCPw(sock *net.TCPConn, writeChan chan []byte,
-	feedbackChan chan int) {
-	feedbackToSocket := make(chan bool)
-	feedbackFromSocket := make(chan bool)
-	go writeToTCP(sock, writeChan, feedbackFromSocket, feedbackToSocket)
-	go func() {
-		<-feedbackFromSocket
-		feedbackChan <- 1
-	}()
-}
-
-//simple write to tcp w/ erorr propagation to/from "read" part of the socket
-func WriteToTCPrw2(sock *net.TCPConn, writeChan chan []byte,
-	feedbackChanFromSocket, feedbackChanToSocket chan int) {
-	loop := 1
-	for loop == 1 {
-		select {
-		case msg := <-writeChan:
-			_, err := sock.Write(msg)
-			if err != nil {
-				select {
-				case feedbackChanFromSocket <- 1:
-					continue
-				case loop = <-feedbackChanToSocket:
-					loop = 0
-					continue
-				}
-			}
-		case <-feedbackChanToSocket:
-			loop = 0
-		}
-	}
-}
-
-//simple write to tcp w/ erorr propagation to/from "read" part of the socket
-func WriteToTCPrw(sock *net.TCPConn, writeChan chan []byte,
-	feedbackChanFromSocket, feedbackChanToSocket chan int) {
-	feedbackToSocket := make(chan bool)
-	feedbackFromSocket := make(chan bool)
-	go writeToTCP(sock, writeChan, feedbackFromSocket, feedbackToSocket)
-	go func() {
-		select {
-		case <-feedbackFromSocket:
-			feedbackChanFromSocket <- 1
-		case <-feedbackChanToSocket:
-			feedbackToSocket <- true
-
-		}
-	}()
-
-}
-
-func makeBuffer(reuseBufferChan chan []byte) []byte {
-	select {
-	case buf := <-reuseBufferChan:
-		return buf
-	default:
-		return make([]byte, 10000)
-	}
-}
-
-//Receive msg from tcp socket and send it as a []byte to readChan,with buffer reuse
-func readFromTCP(sock *net.TCPConn, readChan chan []byte,
-	feedbackFromSocket, feedbackToSocket chan bool,
-	reuseBufferChan chan []byte) {
-	loop := 1
-	var buf []byte
-	for loop == 1 {
-		buf = makeBuffer(reuseBufferChan)
-		bytes, err := sock.Read(buf)
-		if err != nil {
-			select {
-			case feedbackFromSocket <- true:
-				loop = 0
-				continue
-			case <-feedbackToSocket:
-				loop = 0
-				continue
-			}
-		}
-		select {
-		case readChan <- buf[:bytes]:
-		case <-feedbackToSocket:
-			loop = 0
-			continue
-
-		}
-	}
-}
-
-//TCP's write routine, with feedback's chans
-func writeToTCP(sock *net.TCPConn, writeChan chan []byte,
-	feedbackFromSocket, feedbackToSocket chan bool) {
-	loop := 1
-	for loop == 1 {
-		select {
-		case msg := <-writeChan:
-			_, err := sock.Write(msg)
-			if err != nil {
-				select {
-				case feedbackFromSocket <- true:
-				case <-feedbackToSocket:
-				}
-				loop = 0
-				continue
-			}
-		case <-feedbackToSocket:
-			loop = 0
-			continue
-		}
-	}
-}
-
-//reconnecting to remote host for both read and write purpose
-func ReconnectTCPRW(ladr, radr *net.TCPAddr, msgBuf []byte, writeChan chan []byte,
-	readChan chan []byte, feedbackChanToSocket, feedbackChanFromSocket chan int,
-	init_msg []byte) {
-	loop := 1
-	for loop == 1 {
-		sock, err := net.DialTCP("tcp", ladr, radr)
-		if err != nil {
-			time.Sleep(time.Duration(20+rand.Intn(15)) * time.Second)
-			continue
-		}
-		//testing health of the new socket. GO sometimes doesnt rise the error when
-		// we receive RST from remote side
-		_, err = sock.Write(init_msg)
-		if err != nil {
-			sock.Close()
-			time.Sleep(time.Duration(20+rand.Intn(15)) * time.Second)
-			continue
-		}
-		loop = 0
-		go ReadFromTCP(sock, msgBuf, readChan, feedbackChanFromSocket)
-		go WriteToTCPrw(sock, writeChan, feedbackChanFromSocket, feedbackChanToSocket)
-	}
-}
-
-func ReconnectTCPRWReuse(ladr, radr *net.TCPAddr,
-	readChan, writeChan, reuseBufferChan chan []byte,
-	readFeedbackFrom, readFeedbackTo chan bool,
-	writeFeedbackFrom, writeFeedbackTo chan bool) {
-	loop := 1
-	for loop == 1 {
-		sock, err := net.DialTCP("tcp", ladr, radr)
-		if err != nil {
-			time.Sleep(time.Duration(20+rand.Intn(15)) * time.Second)
-			continue
-		}
-		loop = 0
-		go readFromTCP(sock, readChan, readFeedbackFrom, readFeedbackTo,
-			reuseBufferChan)
-		go writeToTCP(sock, writeChan, writeFeedbackFrom, writeFeedbackTo)
-	}
-}
-
-func AutoRecoonectedTCP(ladr, radr *net.TCPAddr, msgBuf, initMsg []byte,
-	writeChan, readChan chan []byte, flushChan chan int) {
-	feedbackChanFromSocket := make(chan int)
-	feedbackChanToSocket := make(chan int)
-	go ReconnectTCPRW(ladr, radr, msgBuf, writeChan, readChan, feedbackChanToSocket,
-		feedbackChanFromSocket, initMsg)
-	for {
-		select {
-		case feedbackFromSocket := <-feedbackChanFromSocket:
-			feedbackChanToSocket <- feedbackFromSocket
-			flushChan <- 1
-			go ReconnectTCPRW(ladr, radr, msgBuf, writeChan,
-				readChan, feedbackChanToSocket,
-				feedbackChanFromSocket, initMsg)
-
-		}
-	}
-
-}
-
-func AutoRecoonectedTCPReuse(ladr, radr *net.TCPAddr,
-	readChan, writeChan chan []byte,
-	reuseChan chan []byte,
-	flushChan chan bool) {
-	readFeedbackFrom := make(chan bool)
-	readFeedbackTo := make(chan bool)
-	writeFeedbackFrom := make(chan bool)
-	writeFeedbackTo := make(chan bool)
-	go ReconnectTCPRWReuse(ladr, radr, readChan, writeChan, reuseChan,
-		readFeedbackFrom, readFeedbackTo,
-		writeFeedbackFrom, writeFeedbackTo)
-	for {
-		select {
-		case <-readFeedbackFrom:
-			writeFeedbackTo <- true
-		case <-writeFeedbackFrom:
-			readFeedbackTo <- true
-		}
-		flushChan <- true
-		go ReconnectTCPRWReuse(ladr, radr, readChan, writeChan, reuseChan,
-			readFeedbackFrom, readFeedbackTo,
-			writeFeedbackFrom, writeFeedbackTo)
-	}
-
-}
-
-//reconnecting to remote host for write only
-func ReconnectTCPW(radr net.TCPAddr, writeChan chan []byte, feedbackChan chan int) {
-	loop := 1
-	for loop == 1 {
-		time.Sleep(time.Duration(20+rand.Intn(15)) * time.Second)
-		sock, err := net.DialTCP("tcp", nil, &radr)
-		if err != nil {
-			continue
-		}
-		//testing health of the new socket. GO sometimes doesnt rise the error when
-		// we receive RST from remote side
-		_, err = sock.Write([]byte{1})
-		if err != nil {
-			sock.Close()
-			continue
-		}
-		loop = 0
-		go WriteToTCPw(sock, writeChan, feedbackChan)
-	}
-}
-
-/* --------------------- CONNECTION MANAGER -------------------------
-Connection manager will allow send data and receive data from remote hosts.
-it will have single ConnectionMsg (see below) read chan and single
-ConnectionMsg write chan toward it's clients
-as well as single read chan from sockets, but multiple write sockets.
-it will route msgs according to Host field in connectionManager struct
-(if it received from client, it will send this msg toward Host's sockets;
-if recved from socket, will proxy it toward client(and client will know from which remote host
-it was received)
--------------------------------------------------------------------- */
-/*
-MsgType's could be:
-from Api's client to ConnectionManager:
-"Data" - msg with Data to Host
-"Connect" - connect to new Host
-...
-from ConnectionManager to Api's client:
-"BufferFlush" - notification that connection to remote Host not longer working.
-advice to flush all the msg buffers assosiated with remote host
-*/
-type ConnectionMsg struct {
-	Host string
-	Data []byte
-	Type string
-}
-
-/*
-Receive msg from tcp socket and send it as a ConnectionMsg to readChan
-TODO: think about more generic version to be more DRYer (to work in both CM and []byte chans
-*/
-func CMReadFromTCP(sock *net.TCPConn, readChan chan ConnectionMsg,
-	peerAddress string) {
-	msgBuf := make([]byte, 65000)
-	loop := 1
-	var msg ConnectionMsg
-	msg.Host = peerAddress
-	msg.Type = "Data"
-	for loop == 1 {
-		bytes, err := sock.Read(msgBuf)
-		if err != nil {
-			msg.Type = "ReadError"
-			readChan <- msg
-			loop = 0
-			continue
-		}
-		b := make([]byte, 0)
-		b = append(b, msgBuf[:bytes]...)
-		msg.Data = b
-		readChan <- msg
-	}
-}
-
-/*
-ConnectionManager write instance to tcp w/ erorr propagation to/from "read" part of the socket
-TODO: think about more generic version to be more DRYer (to work in both CM and []byte chans
-*/
-func CMWriteToTCP(sock *net.TCPConn, writeChan, readChan chan ConnectionMsg,
-	peerAddress string) {
-	loop := 1
-	var errorMsg ConnectionMsg
-	errorMsg.Host = peerAddress
-	errorMsg.Type = "WriteError"
-	for loop == 1 {
-		select {
-		case msg := <-writeChan:
-			switch msg.Type {
-			case "Data":
-				_, err := sock.Write(msg.Data)
-				if err != nil {
-					for loop == 1 {
-						select {
-						case readChan <- errorMsg:
-						case errorMsg := <-writeChan:
-							if errorMsg.Type != "ConnectionError" {
-								continue
-							}
-						}
-						loop = 0
-					}
-				}
-			case "ConnectionError":
-				loop = 0
-			default:
-				continue
-			}
-		}
-	}
-}
-
-func StartConnection(tcpConn *net.TCPConn, writeChan,
-	readChan chan ConnectionMsg, peerAddress string) {
-	go CMReadFromTCP(tcpConn, readChan, peerAddress)
-	go CMWriteToTCP(tcpConn, writeChan, readChan, peerAddress)
-}
-
-func CMListenForConnection(mutex *sync.RWMutex, localPort int,
-	writeChanMap map[string]chan ConnectionMsg,
-	connectionStateMap map[string]int,
-	readChan chan ConnectionMsg) {
-	laddr := strings.Join([]string{":", strconv.Itoa(localPort)}, "")
-	tcpLaddr, err := net.ResolveTCPAddr("tcp", laddr)
-	if err != nil {
-		panic("cant resolve local address for binding")
-	}
-	tcpListener, err := net.ListenTCP("tcp", tcpLaddr)
-	if err != nil {
-		panic("cant listen on local address for binding")
-	}
-	for {
-		tcpConn, err := tcpListener.AcceptTCP()
-		if err == nil {
-			radr := strings.Split(tcpConn.RemoteAddr().String(), ":")[0]
-			// check if we already has connection to remote peer as a client
-			mutex.Lock()
-			if val, exist := connectionStateMap[radr]; exist && val == 1 {
-				tcpConn.Close()
-				mutex.Unlock()
-				continue
-			}
-			connectionStateMap[radr] = 1
-			if writeChan, exist := writeChanMap[radr]; exist {
-				mutex.Unlock()
-				go StartConnection(tcpConn, writeChan, readChan, radr)
-			} else {
-				writeChanMap[radr] = make(chan ConnectionMsg)
-				mutex.Unlock()
-				go StartConnection(tcpConn, writeChanMap[radr], readChan, radr)
-			}
-		}
-	}
-}
-
-func CMConnectToRemotePeer(mutex *sync.RWMutex, peerTcpAddr *net.TCPAddr,
-	radr string,
-	writeChan chan ConnectionMsg,
-	readChan chan ConnectionMsg,
-	connectionStateMap map[string]int) {
-	connectLoop := 1
-	for connectLoop == 1 {
-		mutex.RLock()
-		if connectionStateMap[radr] == 1 {
-			connectLoop = 0
-			mutex.RUnlock()
-			continue
-		}
-		mutex.RUnlock()
-		tcpConn, err := net.DialTCP("tcp", nil, peerTcpAddr)
-		if err != nil {
-			time.Sleep(time.Second * time.Duration(rand.Int63n(15)))
-			continue
-		}
-		mutex.Lock()
-		if connectionStateMap[radr] == 0 {
-			connectionStateMap[radr] = 1
-			go StartConnection(tcpConn, writeChan, readChan, radr)
-			mutex.Unlock()
-			connectLoop = 0
-			continue
-		} else {
-			mutex.Unlock()
-			tcpConn.Close()
-			connectLoop = 0
-			continue
-		}
-	}
-}
-
-func ConnectionManager(msgChan chan ConnectionMsg, localPort int) {
-	writeChanMap := make(map[string]chan ConnectionMsg)
-	connectionStateMap := make(map[string]int)
-	readChan := make(chan ConnectionMsg)
-	var connectionMutex sync.RWMutex
-	go CMListenForConnection(&connectionMutex, localPort, writeChanMap,
-		connectionStateMap, readChan)
-	for {
-		select {
-		case msgToPeer := <-msgChan:
-			switch msgToPeer.Type {
-			case "Data":
-				if state, exists := connectionStateMap[msgToPeer.Host]; exists && state == 1 {
-					/*FIXME/THINK: There could be deadlock if connectin closes before we will
-					be able to send to the chan */
-					writeChan := writeChanMap[msgToPeer.Host]
-					writeChan <- msgToPeer
-				} else {
-					msgChan <- ConnectionMsg{Type: "ConnectionNotExist"}
-				}
-			case "Connect":
-				if len(strings.Split(msgToPeer.Host, ":")) > 1 {
-					radr := strings.Split(msgToPeer.Host, ":")[0]
-					connectionMutex.Lock()
-					if _, exist := writeChanMap[radr]; !exist {
-						writeChanMap[radr] = make(chan ConnectionMsg)
-					}
-					connectionMutex.Unlock()
-					peerTcpAddr, err := net.ResolveTCPAddr("tcp", msgToPeer.Host)
-					if err != nil {
-						//XXX: think about , mb make something less drastic
-						panic("cant resolve remote address")
-					}
-					go CMConnectToRemotePeer(&connectionMutex, peerTcpAddr, radr,
-						writeChanMap[radr], readChan, connectionStateMap)
-				} else {
-					connectionMutex.Lock()
-					if _, exist := writeChanMap[msgToPeer.Host]; !exist {
-						writeChanMap[msgToPeer.Host] = make(chan ConnectionMsg)
-					}
-					connectionMutex.Unlock()
-					remoteAddr := strings.Join([]string{msgToPeer.Host, strconv.Itoa(localPort)}, ":")
-					peerTcpAddr, err := net.ResolveTCPAddr("tcp", remoteAddr)
-					if err != nil {
-						//XXX: again panic could be overkill
-						panic("cant resolve remote address")
-					}
-					go CMConnectToRemotePeer(&connectionMutex, peerTcpAddr, msgToPeer.Host,
-						writeChanMap[msgToPeer.Host], readChan, connectionStateMap)
-				}
-			}
-		case msgFromPeer := <-readChan:
-			switch msgFromPeer.Type {
-			case "Data":
-				msgChan <- msgFromPeer
-			case "WriteError", "ReadError":
-				connectionMutex.Lock()
-				connectionStateMap[msgFromPeer.Host] = 0
-				connectionMutex.Unlock()
-				if msgFromPeer.Type == "ReadError" {
-					writeChanMap[msgFromPeer.Host] <- ConnectionMsg{Type: "ConnectionError"}
-				}
-				var msgToApiClient ConnectionMsg
-				msgToApiClient.Host = msgFromPeer.Host
-				msgToApiClient.Type = "BufferFlush"
-				msgChan <- msgToApiClient
-
-			}
-		}
-	}
-}

vendor/github.com/tehnerd/goUtils/netutils/tcp_listen.go

@@ -1,42 +0,0 @@
-package netutils
-
-import (
-	"errors"
-	"net"
-)
-
-/*
-	we need to provide a function, which will read/write to/from socket and read/write to/from sockets feedback chans
-*/
-func ListenForConnection(port string, fn func(chan []byte, chan []byte, chan int, chan int)) error {
-	addr := ":" + port
-	tcpAddr, err := net.ResolveTCPAddr("tcp", addr)
-	if err != nil {
-		return errors.New("cant resolve local tcp address")
-	}
-	loop := 1
-	servSock, err := net.ListenTCP("tcp", tcpAddr)
-	if err != nil {
-		return errors.New("cant bind to local tcp address")
-	}
-
-	for loop == 1 {
-		sock, err := servSock.AcceptTCP()
-		if err != nil {
-			continue
-		}
-		go ServeTcpConn(sock, fn)
-	}
-	return nil
-}
-
-func ServeTcpConn(sock *net.TCPConn, fn func(chan []byte, chan []byte, chan int, chan int)) {
-	readChan := make(chan []byte)
-	writeChan := make(chan []byte)
-	feedbackFrom := make(chan int, 1)
-	feedbackTo := make(chan int, 1)
-	buf := make([]byte, 65535)
-	go ReadFromTCP(sock, buf, readChan, feedbackFrom)
-	go WriteToTCPrw(sock, writeChan, feedbackFrom, feedbackTo)
-	fn(readChan, writeChan, feedbackFrom, feedbackTo)
-}

vendor/modules.txt

@@ -1,6 +1,3 @@
 # github.com/leprosus/golang-ttl-map v1.1.7
 ## explicit; go 1.15
 github.com/leprosus/golang-ttl-map
-# github.com/tehnerd/goUtils v0.0.0-20150515130609-5a2d8fb2ded8
-## explicit
-github.com/tehnerd/goUtils/netutils