Allowing Commands to reconfigure app Configuration, this is will allow default ports to be currently added to remote presets

application/application.go

@@ -26,6 +26,7 @@ import (
 	"sync"
 	"syscall"
 
+	"github.com/niruix/sshwifty/application/command"
 	"github.com/niruix/sshwifty/application/configuration"
 	"github.com/niruix/sshwifty/application/log"
 	"github.com/niruix/sshwifty/application/server"
@@ -66,11 +67,14 @@ func New(screen io.Writer, logger log.Logger) Application {
 func (a Application) run(
 	cLoader configuration.Loader,
 	closeSigBuilder ProccessSignallerBuilder,
-	handlerBuilder server.HandlerBuilder,
+	commands command.Commands,
+	handlerBuilder server.HandlerBuilderBuilder,
 ) (bool, error) {
 	var err error
 
-	loaderName, c, cErr := cLoader(a.logger.Context("Configuration"))
+	loaderName, c, cErr := cLoader(
+		a.logger.Context("Configuration"),
+		commands.Reconfigure)
 
 	if cErr != nil {
 		a.logger.Error("\"%s\" loader cannot load configuration: %s",
@@ -117,7 +121,7 @@ func (a Application) run(
 
 			close(closeNotify)
 			closeNotify = nil
-		}, handlerBuilder)
+		}, handlerBuilder(commands))
 
 		servers = append(servers, newServer)
 	}
@@ -148,7 +152,8 @@ func (a Application) run(
 func (a Application) Run(
 	cLoader configuration.Loader,
 	closeSigBuilder ProccessSignallerBuilder,
-	handlerBuilder server.HandlerBuilder,
+	commands command.Commands,
+	handlerBuilder server.HandlerBuilderBuilder,
 ) error {
 	fmt.Fprintf(a.screen, banner, FullName, version, Author, URL)
 
@@ -159,7 +164,8 @@ func (a Application) Run(
 	defer a.logger.Info("Closed")
 
 	for {
-		restart, runErr := a.run(cLoader, closeSigBuilder, handlerBuilder)
+		restart, runErr := a.run(
+			cLoader, closeSigBuilder, commands, handlerBuilder)
 
 		if runErr != nil {
 			a.logger.Error("Unable to start due to error: %s", runErr)

application/command/commands.go

@@ -21,6 +21,7 @@ import (
 	"errors"
 	"fmt"
 
+	"github.com/niruix/sshwifty/application/configuration"
 	"github.com/niruix/sshwifty/application/log"
 )
 
@@ -42,20 +43,35 @@ type Command func(
 	cfg Configuration,
 ) FSMMachine
 
+// Builder builds a command
+type Builder struct {
+	command      Command
+	configurator configuration.Reconfigurator
+}
+
+// Register builds a Builder for registration
+func Register(c Command, p configuration.Reconfigurator) Builder {
+	return Builder{
+		command:      c,
+		configurator: p,
+	}
+}
+
 // Commands contains data of all commands
-type Commands [MaxCommandID + 1]Command
+type Commands [MaxCommandID + 1]Builder
 
 // Register registers a new command
-func (c *Commands) Register(id byte, cb Command) {
+func (c *Commands) Register(
+	id byte, cb Command, ps configuration.Reconfigurator) {
 	if id > MaxCommandID {
 		panic("Command ID must be not greater than MaxCommandID")
 	}
 
-	if (*c)[id] != nil {
+	if (*c)[id].command != nil {
 		panic(fmt.Sprintf("Command %d already been registered", id))
 	}
 
-	(*c)[id] = cb
+	(*c)[id] = Register(cb, ps)
 }
 
 // Run creates command executer
@@ -63,16 +79,32 @@ func (c Commands) Run(
 	id byte,
 	l log.Logger,
 	w StreamResponder,
-	cfg Configuration) (FSM, error) {
+	cfg Configuration,
+) (FSM, error) {
 	if id > MaxCommandID {
 		return FSM{}, ErrCommandRunUndefinedCommand
 	}
 
 	cc := c[id]
 
-	if cc == nil {
+	if cc.command == nil {
 		return FSM{}, ErrCommandRunUndefinedCommand
 	}
 
-	return newFSM(cc(l, w, cfg)), nil
+	return newFSM(cc.command(l, w, cfg)), nil
+}
+
+// Reconfigure lets commands reset configuration
+func (c Commands) Reconfigure(
+	p configuration.Configuration,
+) configuration.Configuration {
+	for i := range c {
+		if c[i].configurator == nil {
+			continue
+		}
+
+		p = c[i].configurator(p)
+	}
+
+	return p
 }

application/command/handler_stream_test.go

@@ -171,7 +171,7 @@ func (d *dummyStreamCommand) Release() error {
 
 func TestHandlerHandleStream(t *testing.T) {
 	cmds := Commands{}
-	cmds.Register(0, newDummyStreamCommand)
+	cmds.Register(0, newDummyStreamCommand, nil)
 
 	readerDataInput := make(chan []byte)
 

application/commands/commands.go

@@ -24,7 +24,7 @@ import (
 // New creates a new commands group
 func New() command.Commands {
 	return command.Commands{
-		newTelnet,
-		newSSH,
+		command.Register(newTelnet, parseTelnetConfig),
+		command.Register(newSSH, parseSSHConfig),
 	}
 }

application/commands/ssh.go

@@ -27,6 +27,7 @@ import (
 	"golang.org/x/crypto/ssh"
 
 	"github.com/niruix/sshwifty/application/command"
+	"github.com/niruix/sshwifty/application/configuration"
 	"github.com/niruix/sshwifty/application/log"
 	"github.com/niruix/sshwifty/application/network"
 	"github.com/niruix/sshwifty/application/rw"
@@ -107,6 +108,10 @@ var (
 	sshEmptyTime = time.Time{}
 )
 
+const (
+	sshDefaultPortString = "22"
+)
+
 type sshRemoteConnWrapper struct {
 	net.Conn
 
@@ -198,6 +203,30 @@ func newSSH(
 	}
 }
 
+func parseSSHConfig(p configuration.Configuration) configuration.Configuration {
+	for i := range p.Presets {
+		if p.Presets[i].Type != "SSH" {
+			continue
+		}
+
+		oldHost := p.Presets[i].Host
+
+		_, _, sErr := net.SplitHostPort(p.Presets[i].Host)
+
+		if sErr != nil {
+			p.Presets[i].Host = net.JoinHostPort(
+				p.Presets[i].Host,
+				sshDefaultPortString)
+		}
+
+		if len(p.Presets[i].Host) <= 0 {
+			p.Presets[i].Host = oldHost
+		}
+	}
+
+	return p
+}
+
 func (d *sshClient) Bootup(
 	r *rw.LimitedReader,
 	b []byte,

application/commands/telnet.go

@@ -24,6 +24,7 @@ import (
 	"time"
 
 	"github.com/niruix/sshwifty/application/command"
+	"github.com/niruix/sshwifty/application/configuration"
 	"github.com/niruix/sshwifty/application/log"
 	"github.com/niruix/sshwifty/application/network"
 	"github.com/niruix/sshwifty/application/rw"
@@ -40,6 +41,10 @@ const (
 	TelnetRequestErrorBadRemoteAddress = command.StreamError(0x01)
 )
 
+const (
+	telnetDefaultPortString = "23"
+)
+
 // Server signal codes
 const (
 	TelnetServerRemoteBand    = 0x00
@@ -71,6 +76,32 @@ func newTelnet(
 	}
 }
 
+func parseTelnetConfig(
+	p configuration.Configuration,
+) configuration.Configuration {
+	for i := range p.Presets {
+		if p.Presets[i].Type != "Telnet" {
+			continue
+		}
+
+		oldHost := p.Presets[i].Host
+
+		_, _, sErr := net.SplitHostPort(p.Presets[i].Host)
+
+		if sErr != nil {
+			p.Presets[i].Host = net.JoinHostPort(
+				p.Presets[i].Host,
+				telnetDefaultPortString)
+		}
+
+		if len(p.Presets[i].Host) <= 0 {
+			p.Presets[i].Host = oldHost
+		}
+	}
+
+	return p
+}
+
 func (d *telnetClient) Bootup(
 	r *rw.LimitedReader,
 	b []byte) (command.FSMState, command.FSMError) {

application/configuration/config.go

@@ -132,8 +132,10 @@ type Preset struct {
 type Configuration struct {
 	HostName               string
 	SharedKey              string
-	Dialer                 network.Dial
 	DialTimeout            time.Duration
+	Socks5                 string
+	Socks5User             string
+	Socks5Password         string
 	Servers                []Server
 	Presets                []Preset
 	OnlyAllowPresetRemotes bool
@@ -168,12 +170,50 @@ func (c Configuration) Verify() error {
 	return nil
 }
 
+// Dialer builds a Dialer
+func (c Configuration) Dialer() network.Dial {
+	dialTimeout := c.DialTimeout
+
+	if dialTimeout < 3 {
+		dialTimeout = 3
+	}
+
+	dialer := network.TCPDial()
+
+	if len(c.Socks5) > 0 {
+		sDial, sDialErr := network.BuildSocks5Dial(
+			c.Socks5, c.Socks5User, c.Socks5Password)
+
+		if sDialErr != nil {
+			panic("Unable to build Socks5 Dialer: " + sDialErr.Error())
+		}
+
+		dialer = sDial
+	}
+
+	if c.OnlyAllowPresetRemotes {
+		accessList := make(network.AllowedHosts, len(c.Presets))
+
+		for _, k := range c.Presets {
+			if len(k.Host) <= 0 {
+				continue
+			}
+
+			accessList[k.Host] = struct{}{}
+		}
+
+		dialer = network.AccessControlDial(accessList, dialer)
+	}
+
+	return dialer
+}
+
 // Common returns common settings
 func (c Configuration) Common() Common {
 	return Common{
 		HostName:               c.HostName,
 		SharedKey:              c.SharedKey,
-		Dialer:                 c.Dialer,
+		Dialer:                 c.Dialer(),
 		DialTimeout:            c.DialTimeout,
 		Presets:                c.Presets,
 		OnlyAllowPresetRemotes: c.OnlyAllowPresetRemotes,

application/configuration/loader.go

@@ -21,5 +21,11 @@ import (
 	"github.com/niruix/sshwifty/application/log"
 )
 
+// Reconfigurator reloads configuration
+type Reconfigurator func(p Configuration) Configuration
+
 // Loader Configuration loader
-type Loader func(log log.Logger) (name string, cfg Configuration, err error)
+type Loader func(
+	log log.Logger,
+	r Reconfigurator,
+) (name string, cfg Configuration, err error)

application/configuration/loader_direct.go

@@ -28,7 +28,10 @@ const (
 // Direct creates a loader that return raw configuration data directly.
 // Good for integration.
 func Direct(cfg Configuration) Loader {
-	return func(log log.Logger) (string, Configuration, error) {
+	return func(
+		log log.Logger,
+		r Reconfigurator,
+	) (string, Configuration, error) {
 		return directTypeName, cfg, nil
 	}
 }

application/configuration/loader_enviro.go

@@ -44,13 +44,16 @@ func parseEviro(name string) string {
 
 // Enviro creates an environment variable based configuration loader
 func Enviro() Loader {
-	return func(log log.Logger) (string, Configuration, error) {
+	return func(
+		log log.Logger,
+		r Reconfigurator,
+	) (string, Configuration, error) {
 		log.Info("Loading configuration from environment variables ...")
 
 		dialTimeout, _ := strconv.ParseUint(
 			parseEviro("SSHWIFTY_DIALTIMEOUT"), 10, 32)
 
-		cfg, dialer, cfgErr := fileCfgCommon{
+		cfg, cfgErr := fileCfgCommon{
 			HostName:       parseEviro("SSHWIFTY_HOSTNAME"),
 			SharedKey:      parseEviro("SSHWIFTY_SHAREDKEY"),
 			DialTimeout:    int(dialTimeout),
@@ -68,14 +71,15 @@ func Enviro() Loader {
 				"Failed to build the configuration: %s", cfgErr)
 		}
 
-		listenPort, listenPortErr := strconv.ParseUint(
-			parseEviro("SSHWIFTY_LISTENPORT"), 10, 16)
+		listenIface := parseEviro("SSHWIFTY_LISTENINTERFACE")
 
-		if listenPortErr != nil {
-			return enviroTypeName, Configuration{}, fmt.Errorf(
-				"Invalid \"SSHWIFTY_LISTENPORT\": %s", listenPortErr)
+		if len(listenIface) <= 0 {
+			listenIface = "127.0.0.1"
 		}
 
+		listenPort, _ := strconv.ParseUint(
+			parseEviro("SSHWIFTY_LISTENPORT"), 10, 16)
+
 		initialTimeout, _ := strconv.ParseUint(
 			parseEviro("SSHWIFTY_INITIALTIMEOUT"), 10, 32)
 
@@ -95,7 +99,7 @@ func Enviro() Loader {
 			parseEviro("SSHWIFTY_WRITEELAY"), 10, 32)
 
 		cfgSer := fileCfgServer{
-			ListenInterface:       parseEviro("SSHWIFTY_LISTENINTERFACE"),
+			ListenInterface:       listenIface,
 			ListenPort:            uint16(listenPort),
 			InitialTimeout:        int(initialTimeout),
 			ReadTimeout:           int(readTimeout),
@@ -122,8 +126,10 @@ func Enviro() Loader {
 		return enviroTypeName, Configuration{
 			HostName:               cfg.HostName,
 			SharedKey:              cfg.SharedKey,
-			Dialer:                 dialer,
 			DialTimeout:            time.Duration(cfg.DialTimeout) * time.Second,
+			Socks5:                 cfg.Socks5,
+			Socks5User:             cfg.Socks5User,
+			Socks5Password:         cfg.Socks5Password,
 			Servers:                []Server{cfgSer.build()},
 			Presets:                presets,
 			OnlyAllowPresetRemotes: cfg.OnlyAllowPresetRemotes,

application/configuration/loader_file.go

@@ -28,7 +28,6 @@ import (
 	"time"
 
 	"github.com/niruix/sshwifty/application/log"
-	"github.com/niruix/sshwifty/application/network"
 )
 
 const (
@@ -122,56 +121,24 @@ type fileCfgCommon struct {
 	OnlyAllowPresetRemotes bool
 }
 
-func (f fileCfgCommon) build() (fileCfgCommon, network.Dial, error) {
-	dialTimeout := f.DialTimeout
-
-	if dialTimeout < 3 {
-		dialTimeout = 3
-	}
-
-	var dialer network.Dial
-
-	if len(f.Socks5) <= 0 {
-		dialer = network.TCPDial()
-	} else {
-		sDial, sDialErr := network.BuildSocks5Dial(
-			f.Socks5, f.Socks5User, f.Socks5Password)
-
-		if sDialErr != nil {
-			return fileCfgCommon{}, nil, sDialErr
-		}
-
-		dialer = sDial
-	}
-
-	if f.OnlyAllowPresetRemotes {
-		accessList := make(network.AllowedHosts, len(f.Presets))
-
-		for _, k := range f.Presets {
-			if len(k.Host) <= 0 {
-				continue
-			}
-
-			accessList[k.Host] = struct{}{}
-		}
-
-		dialer = network.AccessControlDial(accessList, dialer)
-	}
-
+func (f fileCfgCommon) build() (fileCfgCommon, error) {
 	return fileCfgCommon{
 		HostName:               f.HostName,
 		SharedKey:              f.SharedKey,
-		DialTimeout:            dialTimeout,
+		DialTimeout:            f.DialTimeout,
 		Socks5:                 f.Socks5,
 		Socks5User:             f.Socks5User,
 		Socks5Password:         f.Socks5Password,
 		Servers:                f.Servers,
 		Presets:                f.Presets,
 		OnlyAllowPresetRemotes: f.OnlyAllowPresetRemotes,
-	}, dialer, nil
+	}, nil
 }
 
-func loadFile(filePath string) (string, Configuration, error) {
+func loadFile(
+	filePath string,
+	r Reconfigurator,
+) (string, Configuration, error) {
 	f, fErr := os.Open(filePath)
 
 	if fErr != nil {
@@ -189,7 +156,7 @@ func loadFile(filePath string) (string, Configuration, error) {
 		return fileTypeName, Configuration{}, jDecodeErr
 	}
 
-	finalCfg, dialer, cfgErr := cfg.build()
+	finalCfg, cfgErr := cfg.build()
 
 	if cfgErr != nil {
 		return fileTypeName, Configuration{}, cfgErr
@@ -207,25 +174,30 @@ func loadFile(filePath string) (string, Configuration, error) {
 		presets[i] = finalCfg.Presets[i].build()
 	}
 
-	return fileTypeName, Configuration{
+	return fileTypeName, r(Configuration{
 		HostName:  finalCfg.HostName,
 		SharedKey: finalCfg.SharedKey,
-		Dialer:    dialer,
 		DialTimeout: time.Duration(finalCfg.DialTimeout) *
 			time.Second,
+		Socks5:                 cfg.Socks5,
+		Socks5User:             cfg.Socks5User,
+		Socks5Password:         cfg.Socks5Password,
 		Servers:                servers,
 		Presets:                presets,
 		OnlyAllowPresetRemotes: cfg.OnlyAllowPresetRemotes,
-	}, nil
+	}), nil
 }
 
 // File creates a configuration file loader
 func File(customPath string) Loader {
-	return func(log log.Logger) (string, Configuration, error) {
+	return func(
+		log log.Logger,
+		r Reconfigurator,
+	) (string, Configuration, error) {
 		if len(customPath) > 0 {
 			log.Info("Loading configuration from: %s", customPath)
 
-			return loadFile(customPath)
+			return loadFile(customPath, r)
 		}
 
 		log.Info("Loading configuration from one of the default " +
@@ -267,7 +239,7 @@ func File(customPath string) Loader {
 			log.Info("Configuration file \"%s\" has been selected",
 				fallbackFileSearchList[f])
 
-			return loadFile(fallbackFileSearchList[f])
+			return loadFile(fallbackFileSearchList[f], r)
 		}
 
 		return fileTypeName, Configuration{}, fmt.Errorf(

application/configuration/loader_redundant.go

@@ -30,11 +30,14 @@ const (
 // Redundant creates a group of loaders. They will be executed one by one until
 // one of it successfully returned a configuration
 func Redundant(loaders ...Loader) Loader {
-	return func(log log.Logger) (string, Configuration, error) {
+	return func(
+		log log.Logger,
+		r Reconfigurator,
+	) (string, Configuration, error) {
 		ll := log.Context("Redundant")
 
 		for i := range loaders {
-			lLoaderName, lCfg, lErr := loaders[i](ll)
+			lLoaderName, lCfg, lErr := loaders[i](ll, r)
 
 			if lErr != nil {
 				ll.Warning("Unable to load configuration from \"%s\": %s",

application/server/server.go

@@ -28,6 +28,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/niruix/sshwifty/application/command"
 	"github.com/niruix/sshwifty/application/configuration"
 	"github.com/niruix/sshwifty/application/log"
 )
@@ -50,6 +51,9 @@ type HandlerBuilder func(
 	cfg configuration.Server,
 	logger log.Logger) http.Handler
 
+// HandlerBuilderBuilder builds HandlerBuilder
+type HandlerBuilderBuilder func(command.Commands) HandlerBuilder
+
 // CloseCallback will be called when the server has closed
 type CloseCallback func(error)
 

sshwifty.go

@@ -43,7 +43,8 @@ func main() {
 			len(os.Getenv("SSHWIFTY_DEBUG")) > 0, application.Name, os.Stderr)).
 		Run(configuration.Redundant(configLoaders...),
 			application.DefaultProccessSignallerBuilder,
-			controller.Builder(commands.New()))
+			commands.New(),
+			controller.Builder)
 
 	if e == nil {
 		return