switch to redis pubsub for communication

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.14-alpine as builder
+FROM golang:1.22-alpine as builder
 
 COPY . /go/src/mumble.info/grumble
 

cmd/grumble/server.go

@@ -17,7 +17,6 @@ import (
 	"fmt"
 	"github.com/golang-jwt/jwt/v5"
 	"hash"
-	"io"
 	"log"
 	"net"
 	"net/http"
@@ -29,6 +28,7 @@ import (
 	"time"
 
 	"github.com/golang/protobuf/proto"
+	"github.com/redis/go-redis/v9"
 	"mumble.info/grumble/pkg/acl"
 	"mumble.info/grumble/pkg/ban"
 	"mumble.info/grumble/pkg/freezer"
@@ -129,7 +129,9 @@ type Server struct {
 	*log.Logger
 
 	// CEF
-	ergo net.Conn
+	ergo         net.Conn
+	redisContext context.Context
+	redis        *redis.Client
 }
 
 type clientLogForwarder struct {
@@ -145,12 +147,8 @@ func (lf clientLogForwarder) Write(incoming []byte) (int, error) {
 	return len(incoming), nil
 }
 
-func (server *Server) ergoMessage(action string, ircChannel string, user string, extra ...string) {
+func (server *Server) ergoMessage(ircChannel string, message ...string) {
-	if server.ergo == nil {
+	server.redis.Publish(server.redisContext, "channel."+ircChannel, strings.Join(message, " "))
-		return
-	}
-	str := fmt.Sprintf("%s %s %s %s\n", action, ircChannel, user, strings.Join(extra, " "))
-	server.ergo.Write([]byte(str))
 }
 
 func (server *Server) ergoStateBroadcast(client *Client) {
@@ -159,52 +157,57 @@ func (server *Server) ergoStateBroadcast(client *Client) {
 	muteState |= b2i(client.Mute) << 1
 	deafState := b2i(client.SelfDeaf)
 	deafState |= b2i(client.Deaf) << 1
-	server.ergoMessage("VOICESTATE", client.ircChannel, client.Username, strconv.Itoa(muteState), strconv.Itoa(deafState))
+	server.ergoMessage(client.ircChannel, "VOICESTATE", client.Username, strconv.Itoa(muteState), strconv.Itoa(deafState))
 }
 
-func (server *Server) ergoConnection() {
+func (server *Server) redisChannelSub() {
-       address := os.Getenv("GRUMBLE_ERGO_ADDR")
+	pubsub := server.redis.PSubscribe(server.redisContext, "channel.*")
-       if len(address) == 0 {
+	defer pubsub.Close()
-               address = "localhost"
-       }
-       conn, _ := net.Dial("tcp", net.JoinHostPort(address, "22843"))
-	server.ergo = conn
-	reader := bufio.NewReader(conn)
-       println("Connection established with ergo at ", address)
-	for {
-		// read client request data
-		data, err := reader.ReadBytes(byte('\n'))
-		if err != nil {
-			if err != io.EOF {
-				fmt.Println("failed to read data, err:", err)
-			}
-			println("Reconnecting to ergo in 5s")
-			time.Sleep(5000)
-			go server.ergoConnection()
-			return
-		}
 
-		line := strings.Split(string(data[:len(data)-1]), " ")
+	ch := pubsub.Channel()
-		fmt.Printf("ergo: %+q\n", line)
+
+	for msg := range ch {
+		println("(Redis) ", msg.Channel, ": ", msg.Payload)
+		channelName := strings.SplitN(msg.Channel, ".", 2)[1]
+		line := strings.Split(msg.Payload, " ")
+		if len(line) == 0 {
+			println("Empty message dumped into ", msg.Channel)
+			continue
+		}
 		switch line[0] {
 		case "KICK":
 			for _, client := range server.clients {
-				if client.ircChannel == line[1] && client.Username == line[2] {
+				if client.ircChannel == channelName && client.Username == line[1] {
 					server.RemoveClient(client, true)
 				}
 			}
-		case "POLL":
+		case "VOICEPOLL":
-			channel, ok := server.WindowedChannels[line[1]]
+			channel, ok := server.WindowedChannels[channelName]
 			if ok {
 				for _, client := range channel.clients {
 					server.ergoStateBroadcast(client)
 				}
 			}
-
 		}
 	}
 }
 
+func (server *Server) ergoConnection() {
+	server.redisContext = context.Background()
+
+	address := os.Getenv("REDIS_ADDR")
+	if len(address) == 0 {
+		address = "redis://localhost/0?protocol=3"
+	}
+	redisOpts, err := redis.ParseURL(address)
+	if err != nil {
+		panic(err)
+	}
+	server.redis = redis.NewClient(redisOpts)
+	println("Redis connection established")
+	go server.redisChannelSub()
+}
+
 // Allocate a new Murmur instance
 func NewServer(id int64) (s *Server, err error) {
 	s = new(Server)
@@ -417,7 +420,7 @@ func (server *Server) RemoveClient(client *Client, kicked bool) {
 	if channel != nil {
 		channel.RemoveClient(client)
 	}
-	server.ergoMessage("PART", client.ircChannel, client.Username)
+	server.ergoMessage(client.ircChannel, "VOICEPART", client.Username)
 
 	// If the user was not kicked, broadcast a UserRemove message.
 	// If the user is disconnect via a kick, the UserRemove message has already been sent

go.mod

@@ -1,11 +1,19 @@
 module mumble.info/grumble
 
-go 1.14
+go 1.22
 
 require (
 	github.com/golang-jwt/jwt/v5 v5.2.1
 	github.com/golang/protobuf v1.5.4
 	github.com/gorilla/websocket v1.5.1
+	github.com/redis/go-redis/v9 v9.6.1
 	golang.org/x/crypto v0.21.0
-	golang.org/x/net v0.22.0 // indirect
+)
+
+require (
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	golang.org/x/net v0.22.0 // indirect
+	golang.org/x/sys v0.18.0 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
 )

go.sum

@@ -1,65 +1,28 @@
+github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
+github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
+github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
+github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
+github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
+github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
+github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
 github.com/golang-jwt/jwt/v5 v5.2.1 h1:OuVbFODueb089Lh128TAcimifWaLhJwVflnrgM17wHk=
 github.com/golang-jwt/jwt/v5 v5.2.1/go.mod h1:pqrtFR0X4osieyHYxtmOUWsAWrfe1Q5UVIyoH402zdk=
-github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/gorilla/websocket v1.5.1 h1:gmztn0JnHVt9JZquRuzLw3g4wouNVzKL15iLr/zn/QY=
 github.com/gorilla/websocket v1.5.1/go.mod h1:x3kM2JMyaluk02fnUJpQuwD2dCS5NDG2ZHL0uE0tcaY=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+github.com/redis/go-redis/v9 v9.6.1 h1:HHDteefn6ZkTtY5fGUE8tj8uy85AHk6zP7CpzIAM0y4=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
-golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
 golang.org/x/crypto v0.21.0 h1:X31++rzVUdKhX5sWmSOFZxx8UW/ldWx55cbf08iNAMA=
 golang.org/x/crypto v0.21.0/go.mod h1:0BP7YvVV9gBbVKyeTG0Gyn+gZm94bibOW5BjDEYAOMs=
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