'fhmq'

README.md

@@ -1,2 +1,44 @@
-# fhmq
+Free and High Performance MQTT Broker 
-Free and high performance mqtt broker
+============
+
+## About
+Golang MQTT Broker, Version 3.1.1, and Compatible
+for [eclipse paho client](https://github.com/eclipse?utf8=%E2%9C%93&q=mqtt&type=&language=)
+
+## RUNNING
+```bash
+$ git clone https://github.com/fhmq/fhmq.git
+$ cd fhmq
+$ go run main.go
+```
+
+### broker.config
+~~~
+{
+	"port": "1883",
+	"host": "0.0.0.0",
+	"cluster": {
+		"host": "0.0.0.0",
+		"port": "1993",
+		"routers": ["192.168.10.11:1993","192.168.10.12:1993"]
+	}
+}
+~~~
+
+### Features and Future
+
+* Supports QOS 0
+
+* Cluster Support
+
+* Supports retained messages
+
+* Supports will messages  
+
+* Queue subscribe
+
+### QUEUE SUBSCRIBE
+
+| Prefix        | Examples                        |
+| ------------- |---------------------------------|
+| $queue/       | mosquitto_sub -t ‘$queue/topic’ |

broker/broker.go

@@ -11,8 +11,9 @@ import (
 type Broker struct {
 	id      string
 	config  *Config
-	clients ClientMap
+	clients cMap
-	routes  ClientMap
+	routes  cMap
+	remotes cMap
 	sl      *Sublist
 	rl      *RetainList
 	queues  map[string]int
@@ -20,12 +21,14 @@ type Broker struct {
 
 func NewBroker(config *Config) *Broker {
 	return &Broker{
+		id:      GenUniqueId(),
 		config:  config,
 		sl:      NewSublist(),
 		rl:      NewRetainList(),
 		queues:  make(map[string]int),
 		clients: NewClientMap(),
 		routes:  NewClientMap(),
+		remotes: NewClientMap(),
 	}
 }
 
@@ -117,25 +120,29 @@ func (b *Broker) handleConnection(typ int, conn net.Conn, idx int) {
 	}
 
 	c := &client{
+		typ:    typ,
 		broker: b,
 		conn:   conn,
 		info:   info,
 	}
 	c.init()
 
+	var msgPool *MessagePool
 	var exist bool
 	var old *client
 	cid := string(c.info.clientID)
 	if typ == CLIENT {
 		old, exist = b.clients.Update(cid, c)
+		msgPool = MSGPool[idx%MessagePoolNum].GetPool()
 	} else if typ == ROUTER {
 		old, exist = b.routes.Update(cid, c)
+		msgPool = MSGPool[MessagePoolNum].GetPool()
 	}
 	if exist {
 		log.Warn("client or routers exists, close old...")
 		old.Close()
 	}
-	c.readLoop(idx)
+	c.readLoop(msgPool)
 }
 
 func (b *Broker) ConnectToRouters() {
@@ -160,7 +167,121 @@ func (b *Broker) connectRouter(url, remoteID string) {
 			remoteID:  remoteID,
 			remoteUrl: url,
 		}
+		cid := GenUniqueId()
+		info := info{
+			clientID: []byte(cid),
+		}
+		c := &client{
+			typ:   REMOTE,
+			conn:  conn,
+			route: route,
+			info:  info,
+		}
+		b.remotes.Set(cid, c)
+		c.SendConnect()
+		c.SendInfo()
 		// s.createRemote(conn, route)
+		msgPool := MSGPool[(MessagePoolNum + 1)].GetPool()
+		c.readLoop(msgPool)
+	}
+}
+
+func (b *Broker) CheckRemoteExist(remoteID, url string) bool {
+	exist := false
+	remotes := b.remotes.Items()
+	for _, v := range remotes {
+		if v.route.remoteUrl == url {
+			// if v.route.remoteID == "" || v.route.remoteID != remoteID {
+			v.route.remoteID = remoteID
+			// }
+			exist = true
+			break
+		}
+	}
+	return exist
+}
+
+func (b *Broker) SendLocalSubsToRouter(c *client) {
+	clients := b.clients.Items()
+	subMsg := message.NewSubscribeMessage()
+	for _, client := range clients {
+		subs := client.subs
+		for _, sub := range subs {
+			subMsg.AddTopic(sub.topic, sub.qos)
+		}
+	}
+	err := c.writeMessage(subMsg)
+	if err != nil {
+		log.Error("Send localsubs To Router error :", err)
+	}
+}
+
+func (b *Broker) BroadcastInfoMessage(remoteID string, msg message.Message) {
+	remotes := b.remotes.Items()
+	for _, r := range remotes {
+		if r.route.remoteID == remoteID {
+			continue
+		}
+		r.writeMessage(msg)
+	}
+	// log.Info("BroadcastInfoMessage success ")
+}
+
+func (b *Broker) BroadcastSubOrUnsubMessage(buf []byte) {
+	remotes := b.remotes.Items()
+	for _, r := range remotes {
+		r.writeBuffer(buf)
+	}
+	// log.Info("BroadcastSubscribeMessage remotes: ", s.remotes)
+}
+
+func (b *Broker) removeClient(c *client) {
+	clientId := string(c.info.clientID)
+	typ := c.typ
+	switch typ {
+	case CLIENT:
+		b.clients.Remove(clientId)
+	case ROUTER:
+		b.routes.Remove(clientId)
+	case REMOTE:
+		b.remotes.Remove(clientId)
+	}
+	// log.Info("delete client ,", clientId)
+}
+
+func (b *Broker) ProcessPublishMessage(msg *message.PublishMessage) {
+	if b == nil {
 		return
+	}
+	topic := string(msg.Topic())
+
+	r := b.sl.Match(topic)
+	// log.Info("psubs num: ", len(r.psubs))
+	if len(r.qsubs) == 0 && len(r.psubs) == 0 {
+		return
+	}
+
+	for _, sub := range r.psubs {
+		if sub != nil {
+			err := sub.client.writeMessage(msg)
+			if err != nil {
+				log.Error("process message for psub error,  ", err)
+			}
+		}
+	}
+
+	for i, sub := range r.qsubs {
+		// s.qmu.Lock()
+		if cnt, exist := b.queues[string(sub.topic)]; exist && i == cnt {
+			if sub != nil {
+				err := sub.client.writeMessage(msg)
+				if err != nil {
+					log.Error("process will message for qsub error,  ", err)
+				}
+			}
+			b.queues[topic] = (b.queues[topic] + 1) % len(r.qsubs)
+			break
+		}
+		// s.qmu.Unlock()
 	}
 }

broker/client.go

@@ -59,9 +59,8 @@ func (c *client) init() {
 	c.info.remoteIP = strings.Split(c.conn.RemoteAddr().String(), ":")[0]
 }
 
-func (c *client) readLoop(idx int) {
+func (c *client) readLoop(msgPool *MessagePool) {
 	nc := c.conn
-	msgPool := MSGPool[idx%MessagePoolNum].GetPool()
 	if nc == nil || msgPool == nil {
 		return
 	}
@@ -144,6 +143,7 @@ func (c *client) ProcessPublish(buf []byte) {
 	msg, err := DecodePublishMessage(buf)
 	if err != nil {
 		log.Error("Decode Publish Message error: ", err)
+		c.Close()
 		return
 	}
 	c.ProcessPublishMessage(buf, msg)
@@ -158,12 +158,14 @@ func (c *client) ProcessPublish(buf []byte) {
 	}
 
 }
+
 func (c *client) ProcessPublishMessage(buf []byte, msg *message.PublishMessage) {
 
 	b := c.broker
 	if b == nil {
 		return
 	}
+	typ := c.typ
 	topic := string(msg.Topic())
 
 	r := b.sl.Match(topic)
@@ -173,11 +175,11 @@ func (c *client) ProcessPublishMessage(buf []byte, msg *message.PublishMessage)
 	}
 
 	for _, sub := range r.psubs {
-		// if sub.client.typ == ROUTER {
+		if sub.client.typ == ROUTER {
-		// 	if typ == ROUTER {
+			if typ == ROUTER {
-		// 		continue
+				continue
-		// 	}
+			}
-		// }
+		}
 		if sub != nil {
 			err := sub.client.writeBuffer(buf)
 			if err != nil {
@@ -187,11 +189,11 @@ func (c *client) ProcessPublishMessage(buf []byte, msg *message.PublishMessage)
 	}
 
 	for i, sub := range r.qsubs {
-		// if sub.client.typ == ROUTER {
+		if sub.client.typ == ROUTER {
-		// 	if typ == ROUTER {
+			if typ == ROUTER {
-		// 		continue
+				continue
-		// 	}
+			}
-		// }
+		}
 		// s.qmu.Lock()
 		if cnt, exist := b.queues[string(sub.topic)]; exist && i == cnt {
 			if sub != nil {
@@ -224,8 +226,8 @@ func (c *client) ProcessPubComp(buf []byte) {
 }
 
 func (c *client) ProcessSubscribe(buf []byte) {
-	srv := c.broker
+	b := c.broker
-	if srv == nil {
+	if b == nil {
 		return
 	}
 	msg, err := DecodeSubscribeMessage(buf)
@@ -256,11 +258,11 @@ func (c *client) ProcessSubscribe(buf []byte) {
 				if len(t) > 7 {
 					t = t[7:]
 					queue = true
-					// srv.qmu.Lock()
+					// b.qmu.Lock()
-					if _, exists := srv.queues[topic]; !exists {
+					if _, exists := b.queues[topic]; !exists {
-						srv.queues[topic] = 0
+						b.queues[topic] = 0
 					}
-					// srv.qmu.Unlock()
+					// b.qmu.Unlock()
 				} else {
 					retcodes = append(retcodes, message.QosFailure)
 					continue
@@ -273,11 +275,11 @@ func (c *client) ProcessSubscribe(buf []byte) {
 				queue:  queue,
 			}
 
-			// c.mu.Lock()
+			c.mu.Lock()
 			c.subs[topic] = sub
-			// c.mu.Unlock()
+			c.mu.Unlock()
 
-			err := srv.sl.Insert(sub)
+			err := b.sl.Insert(sub)
 			if err != nil {
 				log.Error("Insert subscription error: ", err)
 				retcodes = append(retcodes, message.QosFailure)
@@ -305,15 +307,13 @@ func (c *client) ProcessSubscribe(buf []byte) {
 		return
 	}
 	//broadcast subscribe message
-	// if typ == CLIENT {
+	if c.typ == CLIENT {
-	// 	srv.startGoRoutine(func() {
+		go b.BroadcastSubOrUnsubMessage(buf)
-	// 		srv.BroadcastSubscribeMessage(buf)
+	}
-	// 	})
-	// }
 
 	//process retain message
 	for _, t := range topics {
-		bufs := srv.rl.Match(t)
+		bufs := b.rl.Match(t)
 		for _, buf := range bufs {
 			log.Info("process retain  message: ", string(buf))
 			if buf != nil && string(buf) != "" {
@@ -324,8 +324,8 @@ func (c *client) ProcessSubscribe(buf []byte) {
 }
 
 func (c *client) ProcessUnSubscribe(buf []byte) {
-	srv := c.broker
+	b := c.broker
-	if srv == nil {
+	if b == nil {
 		return
 	}
 
@@ -356,9 +356,9 @@ func (c *client) ProcessUnSubscribe(buf []byte) {
 		return
 	}
 	// //process ubsubscribe message
-	// if typ == CLIENT {
+	if c.typ == CLIENT {
-	// 	c.srv.BroadcastUnSubscribeMessage(msg)
+		b.BroadcastSubOrUnsubMessage(buf)
-	// }
+	}
 }
 
 func (c *client) unsubscribe(sub *subscription) {
@@ -389,15 +389,19 @@ func (c *client) ProcessPing(buf []byte) {
 }
 
 func (c *client) Close() {
-	srv := c.broker
+	b := c.broker
 	subs := c.subs
-	if srv != nil {
+	if b != nil {
+		b.removeClient(c)
 		for _, sub := range subs {
-			err := srv.sl.Remove(sub)
+			err := b.sl.Remove(sub)
 			if err != nil {
 				log.Error("closed client but remove sublist error, ", err)
 			}
 		}
+		if c.info.willMsg != nil {
+			b.ProcessPublishMessage(c.info.willMsg)
+		}
 	}
 	if c.conn != nil {
 		c.conn.Close()

broker/clientmap.go

@@ -2,7 +2,7 @@ package broker
 
 import "sync"
 
-type ClientMap interface {
+type cMap interface {
 	Set(key string, val *client)
 	Get(key string) (*client, bool)
 	Items() map[string]*client
@@ -17,7 +17,7 @@ type clientMap struct {
 	mu    sync.RWMutex
 }
 
-func NewClientMap() ClientMap {
+func NewClientMap() cMap {
 	smap := &clientMap{
 		items: make(map[string]*client),
 	}

broker/comm.go

@@ -2,7 +2,12 @@ package broker
 
 import (
 	"bytes"
+	"crypto/md5"
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/hex"
 	"errors"
+	"io"
 	"reflect"
 	"strings"
 	"time"
@@ -128,3 +133,14 @@ func equal(k1, k2 interface{}) bool {
 	}
 	return false
 }
+
+func GenUniqueId() string {
+	b := make([]byte, 48)
+	if _, err := io.ReadFull(rand.Reader, b); err != nil {
+		return ""
+	}
+	h := md5.New()
+	h.Write([]byte(base64.URLEncoding.EncodeToString(b)))
+	return hex.EncodeToString(h.Sum(nil))
+	// return GetMd5String()
+}

broker/config.go

@@ -5,7 +5,7 @@ import (
 	"errors"
 	"io/ioutil"
 
-	"github.com/prometheus/common/log"
+	log "github.com/cihub/seelog"
 )
 
 const (

broker/info.go

@@ -0,0 +1,113 @@
+package broker
+
+import (
+	"fhmq/lib/message"
+	"fmt"
+	"time"
+
+	simplejson "github.com/bitly/go-simplejson"
+	log "github.com/cihub/seelog"
+)
+
+func (c *client) SendInfo() {
+	url := c.info.localIP + ":" + c.broker.config.Cluster.Port
+
+	infoMsg := NewInfo(c.broker.id, url, false)
+	err := c.writeMessage(infoMsg)
+	if err != nil {
+		log.Error("send info message error, ", err)
+		return
+	}
+	// log.Info("send info success")
+}
+
+func (c *client) StartPing() {
+	timeTicker := time.NewTicker(time.Second * 30)
+	ping := message.NewPingreqMessage()
+	for {
+		select {
+		case <-timeTicker.C:
+			err := c.writeMessage(ping)
+			if err != nil {
+				log.Error("ping error: ", err)
+			}
+		}
+	}
+}
+
+func (c *client) SendConnect() {
+
+	clientID := c.info.clientID
+	connMsg := message.NewConnectMessage()
+	connMsg.SetClientId(clientID)
+	connMsg.SetVersion(0x04)
+	err := c.writeMessage(connMsg)
+	if err != nil {
+		log.Error("send connect message error, ", err)
+		return
+	}
+	// log.Info("send connet success")
+}
+
+func NewInfo(sid, url string, isforword bool) *message.PublishMessage {
+	infoMsg := message.NewPublishMessage()
+	infoMsg.SetTopic([]byte(BrokerInfoTopic))
+	info := fmt.Sprintf(`{"remoteID":"%s","url":"%s","isForward":%t}`, sid, url, isforword)
+	// log.Info("new info", string(info))
+	infoMsg.SetPayload([]byte(info))
+	infoMsg.SetQoS(0)
+	infoMsg.SetRetain(false)
+	return infoMsg
+}
+
+func (c *client) ProcessInfo(msg *message.PublishMessage) {
+	nc := c.conn
+	b := c.broker
+	if nc == nil {
+		return
+	}
+
+	log.Info("recv remoteInfo: ", string(msg.Payload()))
+
+	js, e := simplejson.NewJson(msg.Payload())
+	if e != nil {
+		log.Warn("parse info message err", e)
+		return
+	}
+
+	rid := js.Get("remoteID").MustString()
+	rurl := js.Get("url").MustString()
+	isForward := js.Get("isForward").MustBool()
+
+	if rid == "" {
+		log.Error("receive info message error with remoteID is null")
+		return
+	}
+
+	if rid == b.id {
+		if !isForward {
+			c.Close() //close connet self
+		}
+		return
+	}
+
+	exist := b.CheckRemoteExist(rid, rurl)
+	if !exist {
+		go b.connectRouter(rurl, rid)
+	}
+	// log.Info("isforword: ", isForward)
+	if !isForward {
+		route := &route{
+			remoteUrl: rurl,
+			remoteID:  rid,
+		}
+		c.route = route
+
+		go b.SendLocalSubsToRouter(c)
+		// log.Info("BroadcastInfoMessage starting... ")
+		infoMsg := NewInfo(rid, rurl, true)
+		b.BroadcastInfoMessage(rid, infoMsg)
+	}
+
+	return
+}

broker/msgpool.go

@@ -26,8 +26,8 @@ type MessagePool struct {
 }
 
 func InitMessagePool() {
-	MSGPool = make([]MessagePool, MessagePoolNum)
+	MSGPool = make([]MessagePool, (MessagePoolNum + 2))
-	for i := 0; i < MessagePoolNum; i++ {
+	for i := 0; i < (MessagePoolNum + 2); i++ {
 		MSGPool[i].Init(MessagePoolUser, MessagePoolMessageNum)
 	}
 }