restructur code in packages

cmd/server.go

@@ -12,6 +12,7 @@ import (
 
 	"github.com/genofire/yaja/database"
 	"github.com/genofire/yaja/model/config"
+	"github.com/genofire/yaja/server/extension"
 
 	"github.com/genofire/golang-lib/file"
 	"github.com/genofire/golang-lib/worker"
@@ -29,6 +30,7 @@ var (
 	statesaveWorker *worker.Worker
 	srv             *server.Server
 	certs           *tls.Config
+	extensions      []extension.Extension
 )
 
 // serverCmd represents the serve command
@@ -81,6 +83,7 @@ var serverCmd = &cobra.Command{
 			LoggingClient:   configData.Logging.LevelClient,
 			RegisterEnable:  configData.Register.Enable,
 			RegisterDomains: configData.Register.Domains,
+			Extensions:      extensions,
 		}
 
 		go statesaveWorker.Start()
@@ -161,6 +164,7 @@ func reload() {
 			LoggingClient:   configNewData.Logging.LevelClient,
 			RegisterEnable:  configNewData.Register.Enable,
 			RegisterDomains: configNewData.Register.Domains,
+			Extensions:      extensions,
 		}
 		log.Warn("reloading need a restart:")
 		go newServer.Start()
@@ -176,4 +180,6 @@ func reload() {
 func init() {
 	RootCmd.AddCommand(serverCmd)
 	serverCmd.Flags().StringVarP(&configPath, "config", "c", "yaja.conf", "Path to configuration file")
+
+	extensions = append(extensions, &extension.Message{}, &extension.Roster{Database: db})
 }

model/account.go

@@ -29,9 +29,10 @@ func (d *Domain) UpdateAccount(a *Account) error {
 }
 
 type Account struct {
-	Local    string  `json:"-"`
+	Local    string            `json:"-"`
-	Domain   *Domain `json:"-"`
+	Domain   *Domain           `json:"-"`
-	Password string  `json:"password"`
+	Password string            `json:"password"`
+	Roster   map[string]*Buddy `json:"roster"`
 }
 
 func NewAccount(jid *JID, password string) *Account {

model/buddy.go

@@ -0,0 +1,17 @@
+package model
+
+const (
+	SubscriptionNone = iota
+	SubscriptionTo
+	SubscriptionFrom
+	SubscriptionBoth
+	AskNone = iota
+	AskSubscribe
+)
+
+type Buddy struct {
+	Name         string   `json:"name"`
+	Groups       []string `json:"groups"`
+	Subscription int      `json:"subscription"`
+	Ask          int      `json:"ask"`
+}

server/client.go

@@ -1,76 +0,0 @@
-package server
-
-import (
-	"encoding/xml"
-	"net"
-
-	"github.com/genofire/yaja/model"
-	log "github.com/sirupsen/logrus"
-)
-
-type Client struct {
-	log *log.Entry
-
-	Conn net.Conn
-	out  *xml.Encoder
-	in   *xml.Decoder
-
-	Server  *Server
-	jid     *model.JID
-	account *model.Account
-
-	messages chan interface{}
-	close    chan interface{}
-}
-
-func NewClient(conn net.Conn, srv *Server) *Client {
-	logger := log.New()
-	logger.SetLevel(srv.LoggingClient)
-	client := &Client{
-		Conn:   conn,
-		Server: srv,
-		log:    log.NewEntry(logger),
-		in:     xml.NewDecoder(conn),
-		out:    xml.NewEncoder(conn),
-	}
-	return client
-}
-
-func (client *Client) NewConnecting(conn net.Conn) {
-	client.Conn = conn
-	client.in = xml.NewDecoder(conn)
-	client.out = xml.NewEncoder(conn)
-}
-
-func (client *Client) Read() (*xml.StartElement, error) {
-	for {
-		nextToken, err := client.in.Token()
-		if err != nil {
-			return nil, err
-		}
-		switch nextToken.(type) {
-		case xml.StartElement:
-			element := nextToken.(xml.StartElement)
-			return &element, nil
-		}
-	}
-}
-
-func (client *Client) DomainRegisterAllowed() bool {
-	if client.jid.Domain == "" {
-		return false
-	}
-
-	for _, domain := range client.Server.RegisterDomains {
-		if domain == client.jid.Domain {
-
-			return !client.Server.RegisterEnable
-		}
-	}
-	return client.Server.RegisterEnable
-}
-
-func (client *Client) Close() {
-	client.close <- true
-	client.Conn.Close()
-}

server/extension/main.go

@@ -0,0 +1,11 @@
+package extension
+
+import (
+	"encoding/xml"
+
+	"github.com/genofire/yaja/server/utils"
+)
+
+type Extension interface {
+	Process(*xml.StartElement, *utils.Client) bool
+}

server/extension/message.go

@@ -0,0 +1,15 @@
+package extension
+
+import (
+	"encoding/xml"
+
+	"github.com/genofire/yaja/server/utils"
+)
+
+type Message struct {
+	Extension
+}
+
+func (m *Message) Process(element *xml.StartElement, client *utils.Client) bool {
+	return false
+}

server/extension/roster.go

@@ -0,0 +1,27 @@
+package extension
+
+import (
+	"encoding/xml"
+
+	"github.com/genofire/yaja/database"
+	"github.com/genofire/yaja/messages"
+	"github.com/genofire/yaja/server/utils"
+)
+
+type Roster struct {
+	Extension
+	Database *database.State
+}
+
+func (r *Roster) Process(element *xml.StartElement, client *utils.Client) bool {
+	var msg messages.IQ
+	if err := client.In.DecodeElement(&msg, element); err != nil {
+		client.Log.Warn("is no iq: ", err)
+		return false
+	}
+	if msg.Type != messages.IQTypeGet {
+		client.Log.Warn("is no get iq")
+		return false
+	}
+	return true
+}

server/server.go

@@ -5,6 +5,10 @@ import (
 	"net"
 
 	"github.com/genofire/yaja/database"
+	"github.com/genofire/yaja/model"
+	"github.com/genofire/yaja/server/extension"
+	"github.com/genofire/yaja/server/toclient"
+	"github.com/genofire/yaja/server/utils"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/crypto/acme/autocert"
 )
@@ -16,8 +20,9 @@ type Server struct {
 	ServerAddr      []string
 	Database        *database.State
 	LoggingClient   log.Level
-	RegisterEnable  bool     `toml:"enable"`
+	RegisterEnable  bool
-	RegisterDomains []string `toml:"domains"`
+	RegisterDomains []string
+	Extensions      []extension.Extension
 }
 
 func (srv *Server) Start() {
@@ -68,13 +73,13 @@ func (srv *Server) handleServer(conn net.Conn) {
 
 func (srv *Server) handleClient(conn net.Conn) {
 	log.Info("new client connection:", conn.RemoteAddr())
-	client := NewClient(conn, srv)
+	client := utils.NewClient(conn, srv.LoggingClient)
-	state := ConnectionStartup()
+	state := toclient.ConnectionStartup(srv.Database, srv.TLSConfig, srv.TLSManager, srv.DomainRegisterAllowed)
 
 	for {
 		state, client = state.Process(client)
 		if state == nil {
-			client.log.Info("disconnect")
+			client.Log.Info("disconnect")
 			client.Close()
 			//s.DisconnectBus <- Disconnect{Jid: client.jid}
 			return
@@ -83,6 +88,19 @@ func (srv *Server) handleClient(conn net.Conn) {
 	}
 }
 
+func (srv *Server) DomainRegisterAllowed(jid *model.JID) bool {
+	if jid.Domain == "" {
+		return false
+	}
+
+	for _, domain := range srv.RegisterDomains {
+		if domain == jid.Domain {
+			return !srv.RegisterEnable
+		}
+	}
+	return srv.RegisterEnable
+}
+
 func (srv *Server) Close() {
 
 }

server/state.go

@@ -1,6 +0,0 @@
-package server
-
-// State processes the stream and moves to the next state
-type State interface {
-	Process(client *Client) (State, *Client)
-}

server/state/connect.go

@@ -0,0 +1,125 @@
+package state
+
+import (
+	"crypto/tls"
+	"fmt"
+
+	"github.com/genofire/yaja/messages"
+	"github.com/genofire/yaja/model"
+	"github.com/genofire/yaja/server/utils"
+	"golang.org/x/crypto/acme/autocert"
+)
+
+// ConnectionStartup return steps through TCP TLS state
+func ConnectionStartup(after State, tlsconfig *tls.Config, tlsmgmt *autocert.Manager) State {
+	tlsupgrade := &TLSUpgrade{
+		Next:      after,
+		tlsconfig: tlsconfig,
+		tlsmgmt:   tlsmgmt,
+	}
+	stream := &Start{Next: tlsupgrade}
+	return stream
+}
+
+// Start state
+type Start struct {
+	Next State
+}
+
+// Process message
+func (state *Start) Process(client *utils.Client) (State, *utils.Client) {
+	client.Log = client.Log.WithField("state", "stream")
+	client.Log.Debug("running")
+	defer client.Log.Debug("leave")
+
+	element, err := client.Read()
+	if err != nil {
+		client.Log.Warn("unable to read: ", err)
+		return nil, client
+	}
+	if element.Name.Space != messages.NSStream || element.Name.Local != "stream" {
+		client.Log.Warn("is no stream")
+		return state, client
+	}
+	for _, attr := range element.Attr {
+		if attr.Name.Local == "to" {
+			client.JID = &model.JID{Domain: attr.Value}
+			client.Log = client.Log.WithField("jid", client.JID.Full())
+		}
+	}
+	if client.JID == nil {
+		client.Log.Warn("no 'to' domain readed")
+		return nil, client
+	}
+
+	fmt.Fprintf(client.Conn, `<?xml version='1.0'?>
+		<stream:stream id='%x' version='1.0' xmlns='%s' xmlns:stream='%s'>`,
+		utils.CreateCookie(), messages.NSClient, messages.NSStream)
+
+	fmt.Fprintf(client.Conn, `<stream:features>
+			<starttls xmlns='%s'>
+				<required/>
+			</starttls>
+		</stream:features>`,
+		messages.NSStream)
+
+	return state.Next, client
+}
+
+// TLSUpgrade state
+type TLSUpgrade struct {
+	Next      State
+	tlsconfig *tls.Config
+	tlsmgmt   *autocert.Manager
+}
+
+// Process message
+func (state *TLSUpgrade) Process(client *utils.Client) (State, *utils.Client) {
+	client.Log = client.Log.WithField("state", "tls upgrade")
+	client.Log.Debug("running")
+	defer client.Log.Debug("leave")
+
+	element, err := client.Read()
+	if err != nil {
+		client.Log.Warn("unable to read: ", err)
+		return nil, client
+	}
+	if element.Name.Space != messages.NSTLS || element.Name.Local != "starttls" {
+		client.Log.Warn("is no starttls")
+		return state, client
+	}
+	fmt.Fprintf(client.Conn, "<proceed xmlns='%s'/>", messages.NSTLS)
+	// perform the TLS handshake
+	var tlsConfig *tls.Config
+	if m := state.tlsmgmt; m != nil {
+		var cert *tls.Certificate
+		cert, err = m.GetCertificate(&tls.ClientHelloInfo{ServerName: client.JID.Domain})
+		if err != nil {
+			client.Log.Warn("no cert in tls manger found: ", err)
+			return nil, client
+		}
+		tlsConfig = &tls.Config{
+			Certificates: []tls.Certificate{*cert},
+		}
+	}
+	if tlsConfig == nil {
+		tlsConfig = state.tlsconfig
+		if tlsConfig != nil {
+			tlsConfig.ServerName = client.JID.Domain
+		} else {
+			client.Log.Warn("no tls config found: ", err)
+			return nil, client
+		}
+	}
+
+	tlsConn := tls.Server(client.Conn, tlsConfig)
+	err = tlsConn.Handshake()
+	if err != nil {
+		client.Log.Warn("unable to tls handshake: ", err)
+		return nil, client
+	}
+	// restart the Connection
+	client.SetConnecting(tlsConn)
+
+	return state.Next, client
+}

server/state/state.go

@@ -0,0 +1,8 @@
+package state
+
+import "github.com/genofire/yaja/server/utils"
+
+// State processes the stream and moves to the next state
+type State interface {
+	Process(client *utils.Client) (State, *utils.Client)
+}

server/state_connect.go

@@ -1,353 +0,0 @@
-package server
-
-import (
-	"crypto/tls"
-	"encoding/base64"
-	"encoding/xml"
-	"fmt"
-	"strings"
-
-	"github.com/genofire/yaja/messages"
-	"github.com/genofire/yaja/model"
-)
-
-// ConnectionStartup return steps through TCP TLS state
-func ConnectionStartup() State {
-	receiving := &ReceivingClient{}
-	sending := &SendingClient{Next: receiving}
-	authedstream := &AuthedStream{Next: sending}
-	authedstart := &AuthedStart{Next: authedstream}
-	tlsauth := &SASLAuth{Next: authedstart}
-	tlsstream := &TLSStream{Next: tlsauth}
-	tlsupgrade := &TLSUpgrade{Next: tlsstream}
-	stream := &Start{Next: tlsupgrade}
-	return stream
-}
-
-// Start state
-type Start struct {
-	Next State
-}
-
-// Process message
-func (state *Start) Process(client *Client) (State, *Client) {
-	client.log = client.log.WithField("state", "stream")
-	client.log.Debug("running")
-	defer client.log.Debug("leave")
-
-	element, err := client.Read()
-	if err != nil {
-		client.log.Warn("unable to read: ", err)
-		return nil, client
-	}
-	if element.Name.Space != messages.NSStream || element.Name.Local != "stream" {
-		client.log.Warn("is no stream")
-		return state, client
-	}
-	for _, attr := range element.Attr {
-		if attr.Name.Local == "to" {
-			client.jid = &model.JID{Domain: attr.Value}
-			client.log = client.log.WithField("jid", client.jid.Full())
-		}
-	}
-	if client.jid == nil {
-		client.log.Warn("no 'to' domain readed")
-		return nil, client
-	}
-
-	fmt.Fprintf(client.Conn, `<?xml version='1.0'?>
-		<stream:stream id='%x' version='1.0' xmlns='%s' xmlns:stream='%s'>`,
-		createCookie(), messages.NSClient, messages.NSStream)
-
-	fmt.Fprintf(client.Conn, `<stream:features>
-			<starttls xmlns='%s'>
-				<required/>
-			</starttls>
-		</stream:features>`,
-		messages.NSStream)
-
-	return state.Next, client
-}
-
-// TLSUpgrade state
-type TLSUpgrade struct {
-	Next State
-}
-
-// Process message
-func (state *TLSUpgrade) Process(client *Client) (State, *Client) {
-	client.log = client.log.WithField("state", "tls upgrade")
-	client.log.Debug("running")
-	defer client.log.Debug("leave")
-
-	element, err := client.Read()
-	if err != nil {
-		client.log.Warn("unable to read: ", err)
-		return nil, client
-	}
-	if element.Name.Space != messages.NSTLS || element.Name.Local != "starttls" {
-		client.log.Warn("is no starttls")
-		return state, client
-	}
-	fmt.Fprintf(client.Conn, "<proceed xmlns='%s'/>", messages.NSTLS)
-	// perform the TLS handshake
-	var tlsConfig *tls.Config
-	if m := client.Server.TLSManager; m != nil {
-		var cert *tls.Certificate
-		cert, err = m.GetCertificate(&tls.ClientHelloInfo{ServerName: client.jid.Domain})
-		if err != nil {
-			client.log.Warn("no cert in tls manger found: ", err)
-			return nil, client
-		}
-		tlsConfig = &tls.Config{
-			Certificates: []tls.Certificate{*cert},
-		}
-	}
-	if tlsConfig == nil {
-		tlsConfig = client.Server.TLSConfig
-		if tlsConfig != nil {
-			tlsConfig.ServerName = client.jid.Domain
-		} else {
-			client.log.Warn("no tls config found: ", err)
-			return nil, client
-		}
-	}
-
-	tlsConn := tls.Server(client.Conn, tlsConfig)
-	err = tlsConn.Handshake()
-	if err != nil {
-		client.log.Warn("unable to tls handshake: ", err)
-		return nil, client
-	}
-	// restart the Connection
-	client.NewConnecting(tlsConn)
-
-	return state.Next, client
-}
-
-// TLSStream state
-type TLSStream struct {
-	Next State
-}
-
-// Process messages
-func (state *TLSStream) Process(client *Client) (State, *Client) {
-	client.log = client.log.WithField("state", "tls stream")
-	client.log.Debug("running")
-	defer client.log.Debug("leave")
-
-	element, err := client.Read()
-	if err != nil {
-		client.log.Warn("unable to read: ", err)
-		return nil, client
-	}
-	if element.Name.Space != messages.NSStream || element.Name.Local != "stream" {
-		client.log.Warn("is no stream")
-		return state, client
-	}
-
-	fmt.Fprintf(client.Conn, `<?xml version='1.0'?>
-		<stream:stream id='%x' version='1.0' xmlns='%s' xmlns:stream='%s'>`,
-		createCookie(), messages.NSClient, messages.NSStream)
-
-	if client.DomainRegisterAllowed() {
-		fmt.Fprintf(client.Conn, `<stream:features>
-			<mechanisms xmlns='%s'>
-				<mechanism>PLAIN</mechanism>
-			</mechanisms>
-			<register xmlns='%s'/>
-		</stream:features>`,
-			messages.NSSASL, messages.NSFeaturesIQRegister)
-	} else {
-		fmt.Fprintf(client.Conn, `<stream:features>
-			<mechanisms xmlns='%s'>
-				<mechanism>PLAIN</mechanism>
-			</mechanisms>
-		</stream:features>`,
-			messages.NSSASL)
-	}
-
-	return state.Next, client
-}
-
-// SASLAuth state
-type SASLAuth struct {
-	Next State
-}
-
-// Process messages
-func (state *SASLAuth) Process(client *Client) (State, *Client) {
-	client.log = client.log.WithField("state", "sasl auth")
-	client.log.Debug("running")
-	defer client.log.Debug("leave")
-
-	// read the full auth stanza
-	element, err := client.Read()
-	if err != nil {
-		client.log.Warn("unable to read: ", err)
-		return nil, client
-	}
-	var auth messages.SASLAuth
-	if err = client.in.DecodeElement(&auth, element); err != nil {
-		client.log.Info("start substate for registration")
-		return &RegisterFormRequest{
-			element: element,
-			Next: &RegisterRequest{
-				Next: state.Next,
-			},
-		}, client
-	}
-	data, err := base64.StdEncoding.DecodeString(auth.Body)
-	if err != nil {
-		client.log.Warn("body decode: ", err)
-		return nil, client
-	}
-	info := strings.Split(string(data), "\x00")
-	// should check that info[1] starts with client.jid
-	client.jid.Local = info[1]
-	client.log = client.log.WithField("jid", client.jid.Full())
-	success, err := client.Server.Database.Authenticate(client.jid, info[2])
-	if err != nil {
-		client.log.Warn("auth: ", err)
-		return nil, client
-	}
-	if success {
-		client.log.Info("success auth")
-		fmt.Fprintf(client.Conn, "<success xmlns='%s'/>", messages.NSSASL)
-		return state.Next, client
-	}
-	client.log.Warn("failed auth")
-	fmt.Fprintf(client.Conn, "<failure xmlns='%s'><not-authorized/></failure>", messages.NSSASL)
-	return nil, client
-
-}
-
-// AuthedStart state
-type AuthedStart struct {
-	Next State
-}
-
-// Process messages
-func (state *AuthedStart) Process(client *Client) (State, *Client) {
-	client.log = client.log.WithField("state", "authed started")
-	client.log.Debug("running")
-	defer client.log.Debug("leave")
-
-	_, err := client.Read()
-	if err != nil {
-		client.log.Warn("unable to read: ", err)
-		return nil, client
-	}
-	fmt.Fprintf(client.Conn, `<?xml version='1.0'?>
-		<stream:stream id='%x' version='1.0' xmlns='%s' xmlns:stream='%s'>`,
-		createCookie(), messages.NSClient, messages.NSStream)
-
-	fmt.Fprintf(client.Conn, `<stream:features>
-			<bind xmlns='%s'/>
-		</stream:features>`,
-		messages.NSBind)
-
-	return state.Next, client
-}
-
-// AuthedStream state
-type AuthedStream struct {
-	Next State
-}
-
-// Process messages
-func (state *AuthedStream) Process(client *Client) (State, *Client) {
-	client.log = client.log.WithField("state", "authed stream")
-	client.log.Debug("running")
-	defer client.log.Debug("leave")
-
-	// check that it's a bind request
-	// read bind request
-	element, err := client.Read()
-	if err != nil {
-		client.log.Warn("unable to read: ", err)
-		return nil, client
-	}
-	var msg messages.IQ
-	if err = client.in.DecodeElement(&msg, element); err != nil {
-		client.log.Warn("is no iq: ", err)
-		return nil, client
-	}
-	if msg.Type != messages.IQTypeSet {
-		client.log.Warn("is no set iq")
-		return nil, client
-	}
-	if msg.Error != nil {
-		client.log.Warn("iq with error: ", msg.Error.Code)
-		return nil, client
-	}
-	type query struct {
-		XMLName  xml.Name `xml:"urn:ietf:params:xml:ns:xmpp-bind bind"`
-		Resource string   `xml:"resource"`
-	}
-	q := &query{}
-	err = xml.Unmarshal(msg.Body, q)
-	if err != nil {
-		client.log.Warn("is no iq bind: ", err)
-		return nil, client
-	}
-	if q.Resource == "" {
-		client.jid.Resource = makeResource()
-	} else {
-		client.jid.Resource = q.Resource
-	}
-	client.log = client.log.WithField("jid", client.jid.Full())
-	client.out.Encode(&messages.IQ{
-		Type: messages.IQTypeResult,
-		ID:   msg.ID,
-		Body: []byte(fmt.Sprintf(
-			`<bind xmlns='%s'>
-				<jid>%s</jid>
-			</bind>`,
-			messages.NSBind, client.jid.Full())),
-	})
-
-	return state.Next, client
-}
-
-// SendingClient state
-type SendingClient struct {
-	Next State
-}
-
-// Process messages
-func (state *SendingClient) Process(client *Client) (State, *Client) {
-	client.log = client.log.WithField("state", "normal")
-	client.log.Debug("sending")
-	// sending
-	go func() {
-		select {
-		case msg := <-client.messages:
-			err := client.out.Encode(msg)
-			client.log.Info(err)
-		case <-client.close:
-			return
-		}
-	}()
-	client.log.Debug("receiving")
-	return state.Next, client
-}
-
-// ReceivingClient state
-type ReceivingClient struct {
-}
-
-// Process messages
-func (state *ReceivingClient) Process(client *Client) (State, *Client) {
-	element, err := client.Read()
-	if err != nil {
-		client.log.Warn("unable to read: ", err)
-		return nil, client
-	}
-	/*
-		for _, extension := range client.Server.Extensions {
-			extension.Process(element, client)
-		}*/
-	client.log.Debug(element)
-	return state, client
-}

server/toclient/connect.go

@@ -0,0 +1,272 @@
+package toclient
+
+import (
+	"crypto/tls"
+	"encoding/base64"
+	"encoding/xml"
+	"fmt"
+	"strings"
+
+	"github.com/genofire/yaja/database"
+	"github.com/genofire/yaja/messages"
+	"github.com/genofire/yaja/server/extension"
+	"github.com/genofire/yaja/server/state"
+	"github.com/genofire/yaja/server/utils"
+	"golang.org/x/crypto/acme/autocert"
+)
+
+// ConnectionStartup return steps through TCP TLS state
+func ConnectionStartup(db *database.State, tlsconfig *tls.Config, tlsmgmt *autocert.Manager, registerAllowed utils.DomainRegisterAllowed) state.State {
+	receiving := &ReceivingClient{}
+	sending := &SendingClient{Next: receiving}
+	authedstream := &AuthedStream{Next: sending}
+	authedstart := &AuthedStart{Next: authedstream}
+	tlsauth := &SASLAuth{
+		Next:                  authedstart,
+		database:              db,
+		domainRegisterAllowed: registerAllowed,
+	}
+	tlsstream := &TLSStream{
+		Next: tlsauth,
+		domainRegisterAllowed: registerAllowed,
+	}
+	return state.ConnectionStartup(tlsstream, tlsconfig, tlsmgmt)
+}
+
+// TLSStream state
+type TLSStream struct {
+	Next                  state.State
+	domainRegisterAllowed utils.DomainRegisterAllowed
+}
+
+// Process messages
+func (state *TLSStream) Process(client *utils.Client) (state.State, *utils.Client) {
+	client.Log = client.Log.WithField("state", "tls stream")
+	client.Log.Debug("running")
+	defer client.Log.Debug("leave")
+
+	element, err := client.Read()
+	if err != nil {
+		client.Log.Warn("unable to read: ", err)
+		return nil, client
+	}
+	if element.Name.Space != messages.NSStream || element.Name.Local != "stream" {
+		client.Log.Warn("is no stream")
+		return state, client
+	}
+
+	fmt.Fprintf(client.Conn, `<?xml version='1.0'?>
+		<stream:stream id='%x' version='1.0' xmlns='%s' xmlns:stream='%s'>`,
+		utils.CreateCookie(), messages.NSClient, messages.NSStream)
+
+	if state.domainRegisterAllowed(client.JID) {
+		fmt.Fprintf(client.Conn, `<stream:features>
+			<mechanisms xmlns='%s'>
+				<mechanism>PLAIN</mechanism>
+			</mechanisms>
+			<register xmlns='%s'/>
+		</stream:features>`,
+			messages.NSSASL, messages.NSFeaturesIQRegister)
+	} else {
+		fmt.Fprintf(client.Conn, `<stream:features>
+			<mechanisms xmlns='%s'>
+				<mechanism>PLAIN</mechanism>
+			</mechanisms>
+		</stream:features>`,
+			messages.NSSASL)
+	}
+
+	return state.Next, client
+}
+
+// SASLAuth state
+type SASLAuth struct {
+	Next                  state.State
+	database              *database.State
+	domainRegisterAllowed utils.DomainRegisterAllowed
+}
+
+// Process messages
+func (state *SASLAuth) Process(client *utils.Client) (state.State, *utils.Client) {
+	client.Log = client.Log.WithField("state", "sasl auth")
+	client.Log.Debug("running")
+	defer client.Log.Debug("leave")
+
+	// read the full auth stanza
+	element, err := client.Read()
+	if err != nil {
+		client.Log.Warn("unable to read: ", err)
+		return nil, client
+	}
+	var auth messages.SASLAuth
+	if err = client.In.DecodeElement(&auth, element); err != nil {
+		client.Log.Info("start substate for registration")
+		return &RegisterFormRequest{
+			element:               element,
+			domainRegisterAllowed: state.domainRegisterAllowed,
+			Next: &RegisterRequest{
+				domainRegisterAllowed: state.domainRegisterAllowed,
+				database:              state.database,
+				Next:                  state.Next,
+			},
+		}, client
+	}
+	data, err := base64.StdEncoding.DecodeString(auth.Body)
+	if err != nil {
+		client.Log.Warn("body decode: ", err)
+		return nil, client
+	}
+	info := strings.Split(string(data), "\x00")
+	// should check that info[1] starts with client.JID
+	client.JID.Local = info[1]
+	client.Log = client.Log.WithField("jid", client.JID.Full())
+	success, err := state.database.Authenticate(client.JID, info[2])
+	if err != nil {
+		client.Log.Warn("auth: ", err)
+		return nil, client
+	}
+	if success {
+		client.Log.Info("success auth")
+		fmt.Fprintf(client.Conn, "<success xmlns='%s'/>", messages.NSSASL)
+		return state.Next, client
+	}
+	client.Log.Warn("failed auth")
+	fmt.Fprintf(client.Conn, "<failure xmlns='%s'><not-authorized/></failure>", messages.NSSASL)
+	return nil, client
+
+}
+
+// AuthedStart state
+type AuthedStart struct {
+	Next state.State
+}
+
+// Process messages
+func (state *AuthedStart) Process(client *utils.Client) (state.State, *utils.Client) {
+	client.Log = client.Log.WithField("state", "authed started")
+	client.Log.Debug("running")
+	defer client.Log.Debug("leave")
+
+	_, err := client.Read()
+	if err != nil {
+		client.Log.Warn("unable to read: ", err)
+		return nil, client
+	}
+	fmt.Fprintf(client.Conn, `<?xml version='1.0'?>
+		<stream:stream id='%x' version='1.0' xmlns='%s' xmlns:stream='%s'>`,
+		utils.CreateCookie(), messages.NSClient, messages.NSStream)
+
+	fmt.Fprintf(client.Conn, `<stream:features>
+			<bind xmlns='%s'/>
+		</stream:features>`,
+		messages.NSBind)
+
+	return state.Next, client
+}
+
+// AuthedStream state
+type AuthedStream struct {
+	Next state.State
+}
+
+// Process messages
+func (state *AuthedStream) Process(client *utils.Client) (state.State, *utils.Client) {
+	client.Log = client.Log.WithField("state", "authed stream")
+	client.Log.Debug("running")
+	defer client.Log.Debug("leave")
+
+	// check that it's a bind request
+	// read bind request
+	element, err := client.Read()
+	if err != nil {
+		client.Log.Warn("unable to read: ", err)
+		return nil, client
+	}
+	var msg messages.IQ
+	if err = client.In.DecodeElement(&msg, element); err != nil {
+		client.Log.Warn("is no iq: ", err)
+		return nil, client
+	}
+	if msg.Type != messages.IQTypeSet {
+		client.Log.Warn("is no set iq")
+		return nil, client
+	}
+	if msg.Error != nil {
+		client.Log.Warn("iq with error: ", msg.Error.Code)
+		return nil, client
+	}
+	type query struct {
+		XMLName  xml.Name `xml:"urn:ietf:params:xml:ns:xmpp-bind bind"`
+		Resource string   `xml:"resource"`
+	}
+	q := &query{}
+	err = xml.Unmarshal(msg.Body, q)
+	if err != nil {
+		client.Log.Warn("is no iq bind: ", err)
+		return nil, client
+	}
+	if q.Resource == "" {
+		client.JID.Resource = makeResource()
+	} else {
+		client.JID.Resource = q.Resource
+	}
+	client.Log = client.Log.WithField("jid", client.JID.Full())
+	client.Out.Encode(&messages.IQ{
+		Type: messages.IQTypeResult,
+		ID:   msg.ID,
+		Body: []byte(fmt.Sprintf(
+			`<bind xmlns='%s'>
+				<jid>%s</jid>
+			</bind>`,
+			messages.NSBind, client.JID.Full())),
+	})
+
+	return state.Next, client
+}
+
+// SendingClient state
+type SendingClient struct {
+	Next state.State
+}
+
+// Process messages
+func (state *SendingClient) Process(client *utils.Client) (state.State, *utils.Client) {
+	client.Log = client.Log.WithField("state", "normal")
+	client.Log.Debug("sending")
+	// sending
+	go func() {
+		select {
+		case msg := <-client.Messages:
+			err := client.Out.Encode(msg)
+			client.Log.Info(err)
+		case <-client.OnClose():
+			return
+		}
+	}()
+	client.Log.Debug("receiving")
+	return state.Next, client
+}
+
+// ReceivingClient state
+type ReceivingClient struct {
+	Extensions []extension.Extension
+}
+
+// Process messages
+func (state *ReceivingClient) Process(client *utils.Client) (state.State, *utils.Client) {
+	element, err := client.Read()
+	if err != nil {
+		client.Log.Warn("unable to read: ", err)
+		return nil, client
+	}
+	count := 0
+	for _, extension := range state.Extensions {
+		if extension.Process(element, client) {
+			count++
+		}
+	}
+	if count != 1 {
+		client.Log.WithField("extension", count).Debug(element)
+	}
+	return state, client
+}

server/toclient/register.go

@@ -1,40 +1,44 @@
-package server
+package toclient
 
 import (
 	"encoding/xml"
 	"fmt"
 
+	"github.com/genofire/yaja/database"
 	"github.com/genofire/yaja/messages"
 	"github.com/genofire/yaja/model"
+	"github.com/genofire/yaja/server/state"
+	"github.com/genofire/yaja/server/utils"
 )
 
 type RegisterFormRequest struct {
-	Next    State
+	Next                  state.State
-	element *xml.StartElement
+	domainRegisterAllowed utils.DomainRegisterAllowed
+	element               *xml.StartElement
 }
 
 // Process message
-func (state *RegisterFormRequest) Process(client *Client) (State, *Client) {
+func (state *RegisterFormRequest) Process(client *utils.Client) (state.State, *utils.Client) {
-	client.log = client.log.WithField("state", "register form request")
+	client.Log = client.Log.WithField("state", "register form request")
-	client.log.Debug("running")
+	client.Log.Debug("running")
-	defer client.log.Debug("leave")
+	defer client.Log.Debug("leave")
 
-	if !client.DomainRegisterAllowed() {
+	if !state.domainRegisterAllowed(client.JID) {
-		client.log.Error("unpossible to reach this state, register on this domain is not allowed")
+		client.Log.Error("unpossible to reach this state, register on this domain is not allowed")
 		return nil, client
 	}
 
 	var msg messages.IQ
-	if err := client.in.DecodeElement(&msg, state.element); err != nil {
+	if err := client.In.DecodeElement(&msg, state.element); err != nil {
-		client.log.Warn("is no iq: ", err)
+		client.Log.Warn("is no iq: ", err)
 		return state, client
 	}
 	if msg.Type != messages.IQTypeGet {
-		client.log.Warn("is no get iq")
+		client.Log.Warn("is no get iq")
 		return state, client
 	}
 	if msg.Error != nil {
-		client.log.Warn("iq with error: ", msg.Error.Code)
+		client.Log.Warn("iq with error: ", msg.Error.Code)
 		return state, client
 	}
 	type query struct {
@@ -44,10 +48,10 @@ func (state *RegisterFormRequest) Process(client *Client) (State, *Client) {
 	err := xml.Unmarshal(msg.Body, q)
 
 	if q.XMLName.Space != messages.NSIQRegister || err != nil {
-		client.log.Warn("is no iq register: ", err)
+		client.Log.Warn("is no iq register: ", err)
 		return nil, client
 	}
-	client.out.Encode(&messages.IQ{
+	client.Out.Encode(&messages.IQ{
 		Type: messages.IQTypeResult,
 		ID:   msg.ID,
 		Body: []byte(fmt.Sprintf(`<query xmlns='%s'><instructions>
@@ -61,36 +65,38 @@ func (state *RegisterFormRequest) Process(client *Client) (State, *Client) {
 }
 
 type RegisterRequest struct {
-	Next State
+	Next                  state.State
+	database              *database.State
+	domainRegisterAllowed utils.DomainRegisterAllowed
 }
 
 // Process message
-func (state *RegisterRequest) Process(client *Client) (State, *Client) {
+func (state *RegisterRequest) Process(client *utils.Client) (state.State, *utils.Client) {
-	client.log = client.log.WithField("state", "register request")
+	client.Log = client.Log.WithField("state", "register request")
-	client.log.Debug("running")
+	client.Log.Debug("running")
-	defer client.log.Debug("leave")
+	defer client.Log.Debug("leave")
 
-	if !client.DomainRegisterAllowed() {
+	if !state.domainRegisterAllowed(client.JID) {
-		client.log.Error("unpossible to reach this state, register on this domain is not allowed")
+		client.Log.Error("unpossible to reach this state, register on this domain is not allowed")
 		return nil, client
 	}
 
 	element, err := client.Read()
 	if err != nil {
-		client.log.Warn("unable to read: ", err)
+		client.Log.Warn("unable to read: ", err)
 		return nil, client
 	}
 	var msg messages.IQ
-	if err = client.in.DecodeElement(&msg, element); err != nil {
+	if err = client.In.DecodeElement(&msg, element); err != nil {
-		client.log.Warn("is no iq: ", err)
+		client.Log.Warn("is no iq: ", err)
 		return state, client
 	}
 	if msg.Type != messages.IQTypeGet {
-		client.log.Warn("is no get iq")
+		client.Log.Warn("is no get iq")
 		return state, client
 	}
 	if msg.Error != nil {
-		client.log.Warn("iq with error: ", msg.Error.Code)
+		client.Log.Warn("iq with error: ", msg.Error.Code)
 		return state, client
 	}
 	type query struct {
@@ -101,16 +107,16 @@ func (state *RegisterRequest) Process(client *Client) (State, *Client) {
 	q := &query{}
 	err = xml.Unmarshal(msg.Body, q)
 	if err != nil {
-		client.log.Warn("is no iq register: ", err)
+		client.Log.Warn("is no iq register: ", err)
 		return nil, client
 	}
 
-	client.jid.Local = q.Username
+	client.JID.Local = q.Username
-	client.log = client.log.WithField("jid", client.jid.Full())
+	client.Log = client.Log.WithField("jid", client.JID.Full())
-	account := model.NewAccount(client.jid, q.Password)
+	account := model.NewAccount(client.JID, q.Password)
-	err = client.Server.Database.AddAccount(account)
+	err = state.database.AddAccount(account)
 	if err != nil {
-		client.out.Encode(&messages.IQ{
+		client.Out.Encode(&messages.IQ{
 			Type: messages.IQTypeResult,
 			ID:   msg.ID,
 			Body: []byte(fmt.Sprintf(`<query xmlns='%s'>
@@ -126,15 +132,14 @@ func (state *RegisterRequest) Process(client *Client) (State, *Client) {
 				},
 			},
 		})
-		client.log.Warn("database error: ", err)
+		client.Log.Warn("database error: ", err)
 		return state, client
 	}
-	client.account = account
+	client.Out.Encode(&messages.IQ{
-	client.out.Encode(&messages.IQ{
 		Type: messages.IQTypeResult,
 		ID:   msg.ID,
 	})
 
-	client.log.Infof("registered client %s", client.jid.Bare())
+	client.Log.Infof("registered client %s", client.JID.Bare())
 	return state.Next, client
 }

server/toclient/utils.go

@@ -0,0 +1,14 @@
+package toclient
+
+import (
+	"crypto/rand"
+	"fmt"
+)
+
+func makeResource() string {
+	var buf [16]byte
+	if _, err := rand.Reader.Read(buf[:]); err != nil {
+		panic("Failed to read random bytes: " + err.Error())
+	}
+	return fmt.Sprintf("%x", buf)
+}

server/utils/client.go

@@ -0,0 +1,65 @@
+package utils
+
+import (
+	"encoding/xml"
+	"net"
+
+	"github.com/genofire/yaja/model"
+	log "github.com/sirupsen/logrus"
+)
+
+type Client struct {
+	Log *log.Entry
+
+	Conn net.Conn
+	Out  *xml.Encoder
+	In   *xml.Decoder
+
+	JID     *model.JID
+	account *model.Account
+
+	Messages chan interface{}
+	close    chan interface{}
+}
+
+func NewClient(conn net.Conn, level log.Level) *Client {
+	logger := log.New()
+	logger.SetLevel(level)
+	client := &Client{
+		Conn:  conn,
+		Log:   log.NewEntry(logger),
+		In:    xml.NewDecoder(conn),
+		Out:   xml.NewEncoder(conn),
+		close: make(chan interface{}),
+	}
+	return client
+}
+
+func (client *Client) SetConnecting(conn net.Conn) {
+	client.Conn = conn
+	client.In = xml.NewDecoder(conn)
+	client.Out = xml.NewEncoder(conn)
+}
+
+func (client *Client) Read() (*xml.StartElement, error) {
+	for {
+		nextToken, err := client.In.Token()
+		if err != nil {
+			return nil, err
+		}
+		switch nextToken.(type) {
+		case xml.StartElement:
+			element := nextToken.(xml.StartElement)
+			return &element, nil
+		}
+	}
+}
+
+func (client *Client) OnClose() <-chan interface{} {
+	return client.close
+}
+
+func (client *Client) Close() {
+	client.close <- true
+	client.Conn.Close()
+}

server/utils/main.go

@@ -1,29 +1,25 @@
-package server
+package utils
 
 import (
 	"crypto/rand"
 	"encoding/binary"
 	"fmt"
+
+	"github.com/genofire/yaja/model"
 )
 
 // Cookie is used to give a unique identifier to each request.
 type Cookie uint64
 
-func createCookie() Cookie {
+func CreateCookie() Cookie {
 	var buf [8]byte
 	if _, err := rand.Reader.Read(buf[:]); err != nil {
 		panic("Failed to read random bytes: " + err.Error())
 	}
 	return Cookie(binary.LittleEndian.Uint64(buf[:]))
 }
-func createCookieString() string {
+func CreateCookieString() string {
-	return fmt.Sprintf("%x", createCookie())
+	return fmt.Sprintf("%x", CreateCookie())
 }
 
-func makeResource() string {
+type DomainRegisterAllowed func(*model.JID) bool
-	var buf [16]byte
-	if _, err := rand.Reader.Read(buf[:]); err != nil {
-		panic("Failed to read random bytes: " + err.Error())
-	}
-	return fmt.Sprintf("%x", buf)
-}