add lifx driver. It works with the bulb, but the code is a bit smelly.

app/config/driver.go

@@ -3,6 +3,7 @@ package config
 import (
 	"git.aiterp.net/lucifer/new-server/internal/drivers"
 	"git.aiterp.net/lucifer/new-server/internal/drivers/hue"
+	"git.aiterp.net/lucifer/new-server/internal/drivers/lifx"
 	"git.aiterp.net/lucifer/new-server/internal/drivers/nanoleaf"
 	"git.aiterp.net/lucifer/new-server/models"
 	"sync"
@@ -19,6 +20,7 @@ func DriverProvider() models.DriverProvider {
 		dp = drivers.DriverMap{
 			models.DTNanoLeaf: &nanoleaf.Driver{},
 			models.DTHue:      &hue.Driver{},
+			models.DTLIFX:     &lifx.Driver{},
 		}
 	}
 

cmd/bridgetest/main.go

@@ -47,6 +47,15 @@ func main() {
 		log.Println("New token:", bridge.Token)
 	}
 
+	ch := config.EventChannel
+	go func() {
+		err := driver.Run(context.Background(), bridge, ch)
+		if err != nil {
+			log.Fatalln("Run bridge stopped:", err)
+		}
+	}()
+	time.Sleep(time.Second)
+
 	// List devices
 	var devices []models.Device
 	if *flagSearch {
@@ -60,18 +69,14 @@ func main() {
 			log.Fatalln("Failed to list devices:", err)
 		}
 	}
+
+	idMap := make(map[string]int)
+	nextId := len(devices) + 1
 	for i := range devices {
 		devices[i].ID = i + 1
+		idMap[devices[i].InternalID] = i + 1
 	}
 
-	ch := config.EventChannel
-	go func() {
-		err := driver.Run(context.Background(), bridge, ch)
-		if err != nil {
-			log.Fatalln("Run bridge stopped:", err)
-		}
-	}()
-
 	go func() {
 		reader := bufio.NewReader(os.Stdin)
 
@@ -85,6 +90,30 @@ func main() {
 			text, _ := reader.ReadString('\n')
 			text = strings.Trim(text, "\t  \r\n")
 
+			if text == "search" {
+				_, _ = driver.SearchDevices(context.Background(), bridge, time.Second)
+			}
+			if text == "list" || text == "search" || text == "json" {
+				devices, err = driver.ListDevices(context.Background(), bridge)
+				if err != nil {
+					log.Fatalln("Failed to list devices:", err)
+				}
+
+				for i, device := range devices {
+					if extId, ok := idMap[device.InternalID]; ok {
+						devices[i].ID = extId
+					} else {
+						idMap[device.InternalID] = nextId
+						devices[i].ID = nextId
+
+						nextId += 1
+					}
+
+					if text != "json" {
+						_, _ = fmt.Fprintf(os.Stderr, "Device: %d - %s %+v\n", device.ID, device.InternalID, device.Capabilities)
+					}
+				}
+			}
 			if text == "json" {
 				j, _ := json.MarshalIndent(devices, "", "  ")
 				fmt.Println(string(j))

internal/drivers/lifx/bridge.go

@@ -0,0 +1,267 @@
+package lifx
+
+import (
+	"context"
+	"git.aiterp.net/lucifer/new-server/models"
+	"log"
+	"sync"
+	"time"
+)
+
+type Bridge struct {
+	mu         sync.Mutex
+	externalID int
+	ip         string
+	states     []*State
+	client     *Client
+}
+
+func (b *Bridge) StartSearch() error {
+	c := b.getClient()
+	if c == nil {
+		return models.ErrBridgeRunningRequired
+	}
+
+	_, err := c.Send("", &GetService{})
+	return err
+}
+
+func (b *Bridge) Publish(devices []models.Device) {
+	b.mu.Lock()
+	for _, device := range devices {
+		state, _ := b.ensureState(device.InternalID)
+
+		state.deviceState = new(models.DeviceState)
+		*state.deviceState = device.State
+
+		b.checkAndUpdateState(state)
+
+		state.externalId = device.ID
+	}
+	b.mu.Unlock()
+}
+
+func (b *Bridge) Devices() []models.Device {
+	devices := make([]models.Device, 0, 8)
+
+	b.mu.Lock()
+	for _, state := range b.states {
+		if state.lightState == nil || state.firmware == nil || state.version == nil {
+			continue
+		}
+
+		deviceState := models.DeviceState{}
+		if state.deviceState != nil {
+			deviceState = *state.deviceState
+		}
+
+		device := models.Device{
+			ID:               state.externalId,
+			BridgeID:         b.externalID,
+			InternalID:       state.target,
+			Icon:             "lightbulb",
+			Name:             state.lightState.Label,
+			Capabilities:     []models.DeviceCapability{models.DCPower, models.DCIntensity},
+			DriverProperties: make(map[string]interface{}),
+			State:            deviceState,
+		}
+
+		device.DriverProperties["lifxVendorId"] = state.version.Vendor
+		device.DriverProperties["lifxProductId"] = state.version.Product
+		device.DriverProperties["lifxFirmwareMajor"] = state.firmware.Major
+		device.DriverProperties["lifxFirmwareMinor"] = state.firmware.Minor
+		device.DriverProperties["lifxFirmwareBuild"] = state.firmware.BuildTime
+
+		product := findProduct(state.version.Vendor, state.version.Product)
+		if product != nil {
+			device.DriverProperties["productName"] = product.Name
+
+			if product.Features.Color {
+				device.Capabilities = append(device.Capabilities, models.DCColorHS)
+			}
+			if len(product.Features.TemperatureRange) >= 2 {
+				device.Capabilities = append(device.Capabilities, models.DCColorHSK, models.DCColorKelvin)
+				device.DriverProperties["minKelvin"] = product.Features.TemperatureRange[0]
+				device.DriverProperties["maxKelvin"] = product.Features.TemperatureRange[1]
+			}
+
+			for _, upgrade := range product.Upgrades {
+				if state.firmware.Major > upgrade.Major || (state.firmware.Major >= upgrade.Major && state.firmware.Minor >= upgrade.Minor) {
+					if upgrade.Features.TemperatureRange != nil {
+						device.DriverProperties["minKelvin"] = upgrade.Features.TemperatureRange[0]
+						device.DriverProperties["maxKelvin"] = upgrade.Features.TemperatureRange[1]
+					}
+				}
+			}
+		}
+
+		devices = append(devices, device)
+	}
+	b.mu.Unlock()
+
+	return devices
+}
+
+func (b *Bridge) Run(ctx context.Context, debug bool) error {
+	client, err := createClient(ctx, b.ip, debug)
+	if err != nil {
+		return err
+	}
+
+	b.mu.Lock()
+	b.client = client
+	b.mu.Unlock()
+	defer func() {
+		b.mu.Lock()
+		if b.client == client {
+			b.client = nil
+		}
+		b.mu.Unlock()
+	}()
+
+	lastSearchTime := time.Now()
+	lastServiceTime := time.Time{}
+	_, err = client.Send("", &GetService{})
+	if err != nil {
+		return err
+	}
+
+	for {
+		target, seq, payload, err := client.Recv(time.Millisecond * 200)
+		if err == models.ErrInvalidPacketSize || err == models.ErrPayloadTooShort || err == models.ErrUnrecognizedPacketType {
+			log.Println("LIFX udp socket received something weird:", err)
+		} else if err != nil && err != models.ErrReadTimeout {
+			if ctx.Err() != nil {
+				return ctx.Err()
+			}
+
+			return err
+		}
+
+		if payload != nil {
+			b.mu.Lock()
+			state, _ := b.ensureState(target)
+			b.mu.Unlock()
+
+			switch p := payload.(type) {
+			case *StateService:
+				if p.Service == 1 {
+					// Throw these messages to the wind. UDP errors will eventually be caught.
+
+					// Get the version only if it's missing. It should never change anyway.
+					b.mu.Lock()
+					if state.version == nil {
+						_, _ = client.Send(target, &GetVersion{})
+					}
+					b.mu.Unlock()
+
+					_, _ = client.Send(target, &GetHostFirmware{})
+
+					lastServiceTime = time.Now()
+				}
+			case *LightState:
+				b.mu.Lock()
+				state.lightState = p
+				state.lightStateTime = time.Now()
+
+				if state.deviceState == nil {
+					state.deviceState = &models.DeviceState{
+						Power: p.On,
+						Color: models.ColorValue{
+							Hue:        p.Hue,
+							Saturation: p.Sat,
+							Kelvin:     p.Kelvin,
+						},
+						Intensity: p.Bri,
+					}
+				}
+
+				b.checkAndUpdateState(state)
+				b.mu.Unlock()
+			case *StateHostFirmware:
+				b.mu.Lock()
+				state.firmware = p
+				b.mu.Unlock()
+			case *StateVersion:
+				b.mu.Lock()
+				state.version = p
+				b.mu.Unlock()
+			case *Acknowledgement:
+				b.mu.Lock()
+				state.handleAck(seq)
+				b.mu.Unlock()
+			}
+		}
+
+		b.mu.Lock()
+		for _, state := range b.states {
+			if time.Since(state.lightStateTime) > time.Second*10 && time.Since(state.requestTime) > time.Second*3 {
+				state.requestTime = time.Now()
+				_, _ = client.Send(state.target, &GetColor{})
+			} else if len(state.acksPending) > 0 && time.Since(state.updateTime) > time.Second {
+				state.requestTime = time.Now()
+				b.checkAndUpdateState(state)
+			}
+
+			if time.Since(state.discoveredTime) > time.Second*10 {
+				if state.firmware == nil {
+					_, _ = client.Send(state.target, &GetHostFirmware{})
+				}
+				if state.version == nil {
+					_, _ = client.Send(state.target, &GetVersion{})
+				}
+			}
+		}
+		b.mu.Unlock()
+
+		//
+		if time.Since(lastServiceTime) > time.Second*30 && time.Since(lastSearchTime) > time.Second*3 {
+			lastSearchTime = time.Now()
+			_, err = client.Send("", &GetService{})
+			if err != nil {
+				return err
+			}
+		}
+	}
+}
+
+func (b *Bridge) checkAndUpdateState(state *State) {
+	state.acksPending = state.acksPending[:0]
+
+	updatePayloads := state.generateUpdate()
+	for _, updatePayload := range updatePayloads {
+		seq, err := b.client.Send(state.target, updatePayload)
+		if err != nil {
+			log.Println("Error sending updates to", state.externalId, state.target, "err:", err)
+			continue
+		}
+
+		state.updateTime = time.Now()
+		state.acksPending = append(state.acksPending, seq)
+	}
+}
+
+func (b *Bridge) ensureState(target string) (*State, bool) {
+	for _, state := range b.states {
+		if state.target == target {
+			return state, false
+		}
+	}
+
+	state := &State{
+		target:         target,
+		discoveredTime: time.Now(),
+	}
+
+	b.states = append(b.states, state)
+
+	return state, true
+}
+
+func (b *Bridge) getClient() *Client {
+	b.mu.Lock()
+	client := b.client
+	b.mu.Unlock()
+
+	return client
+}

internal/drivers/lifx/client.go

@@ -0,0 +1,178 @@
+package lifx
+
+import (
+	"context"
+	"errors"
+	"git.aiterp.net/lucifer/new-server/models"
+	"log"
+	"math/rand"
+	"net"
+	"sync"
+	"time"
+)
+
+type Client struct {
+	mu    sync.Mutex
+	seq   uint8
+	buf   []byte
+	lastN int
+
+	conn   *net.UDPConn
+	source uint32
+	debug  bool
+
+	addrMap map[string]*net.UDPAddr
+}
+
+// Send sends the payload to the hardware addr specified. If it cannot find a mapped
+// IP address from a past message, it will be broadcast and may be slow to use. If the
+// address is left blank, the package is marked as tagged and broadcast.
+//
+// ErrInvalidAddress can be returned by this, and indicates a badly configured device.
+// It should probably be logged.
+func (c *Client) Send(addr string, payload Payload) (seq uint8, err error) {
+	c.mu.Lock()
+	seq = c.seq
+	c.seq += 1
+	c.mu.Unlock()
+
+	packet := createPacket()
+	packet.SetSource(c.source)
+	packet.SetSequence(seq)
+
+	sendAddr := &net.UDPAddr{IP: net.IPv4(255, 255, 255, 255), Port: 56700}
+	if addr == "" {
+		packet.SetTagged(true)
+
+		if c.debug {
+			log.Println("Broadcasting", payload, "seq", seq)
+		}
+	} else {
+		err = packet.SetTarget(addr)
+		if err != nil {
+			return
+		}
+
+		c.mu.Lock()
+		if udpAddr, ok := c.addrMap[addr]; ok {
+			sendAddr = udpAddr
+		}
+		c.mu.Unlock()
+
+		if c.debug {
+			log.Println("Sending", payload, "to", addr, "seq", seq)
+		}
+	}
+
+	packet.SetPayload(payload)
+
+	_, err = c.conn.WriteToUDP(packet, sendAddr)
+	if err != nil {
+		return
+	}
+
+	return
+}
+
+// LastPacket gets the last read packet. This data is valid until the next call to Recv. The Packet may
+// not be valid, however!
+func (c *Client) LastPacket() Packet {
+	if c.lastN < 36 {
+		return nil
+	}
+
+	return c.buf[:c.lastN]
+}
+
+// Recv reads a message from the UDP socket. The data returned is decoded and will always be valid.
+//
+// However, these should be handled specifically:
+// - ErrPayloadTooShort, ErrInvalidPacketSize: Garbage was received, please ignore.
+// - ErrUnrecognizedPacketType: Log these and see what's up
+// - ErrReadTimeout: The connection gets a 50ms read deadline. It should be used to do other things than wait
+func (c *Client) Recv(timeout time.Duration) (target string, seq uint8, payload Payload, err error) {
+	if c.buf == nil {
+		c.buf = make([]byte, 2048)
+	}
+
+	if timeout > 0 {
+		err = c.conn.SetReadDeadline(time.Now().Add(timeout))
+	} else {
+		err = c.conn.SetReadDeadline(time.Time{})
+	}
+	if err != nil {
+		return
+	}
+
+	n, addr, err := c.conn.ReadFromUDP(c.buf)
+	if n > 0 {
+		c.lastN = n
+	}
+	if err != nil {
+		if netErr, ok := err.(*net.OpError); ok && netErr.Timeout() {
+			err = models.ErrReadTimeout
+			return
+		}
+
+		return
+	}
+
+	packet := Packet(c.buf[:n])
+	if n < 2 || packet.Size() != n && packet.Protocol() != 1024 {
+		err = models.ErrInvalidAddress
+		return
+	}
+
+	seq = packet.Sequence()
+	target = packet.Target().String()
+
+	payload, err = packet.Payload()
+	if err != nil {
+		return
+	}
+
+	// Learn the IP address from state service or ack messages.
+	if service, ok := payload.(*StateService); ok && service.Service == 1 {
+		c.mu.Lock()
+		if c.addrMap == nil {
+			c.addrMap = make(map[string]*net.UDPAddr)
+		}
+		c.addrMap[packet.Target().String()] = addr
+		c.mu.Unlock()
+	}
+
+	if c.debug {
+		log.Println("Received", payload, "from", target, "seq", seq)
+	}
+
+	return
+}
+
+// createClient creates a client that will last as long as the context.
+func createClient(ctx context.Context, bindAddr string, debug bool) (*Client, error) {
+	addr := net.ParseIP(bindAddr)
+	if addr == nil {
+		return nil, errors.New("invalid addr")
+	}
+
+	source := uint32(rand.Uint64())
+	if source < 2 {
+		source = 2
+	}
+
+	conn, err := net.ListenUDP("udp", &net.UDPAddr{
+		IP:   addr,
+		Port: 0,
+		Zone: "",
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	go func() {
+		<-ctx.Done()
+		_ = conn.Close()
+	}()
+
+	return &Client{conn: conn, source: source, debug: debug}, nil
+}

internal/drivers/lifx/driver.go

@@ -0,0 +1,177 @@
+package lifx
+
+import (
+	"context"
+	"fmt"
+	"git.aiterp.net/lucifer/new-server/models"
+	"net"
+	"sync"
+	"time"
+)
+
+type Driver struct {
+	mu      sync.Mutex
+	bridges []*Bridge
+}
+
+func (d *Driver) SearchBridge(ctx context.Context, address string, _ bool) ([]models.Bridge, error) {
+	if address == "" {
+		ifaces, err := net.Interfaces()
+		if err != nil {
+			return nil, err
+		}
+
+		bridges := make([]models.Bridge, 0, len(ifaces))
+		for _, iface := range ifaces {
+			if iface.Name == "lo" {
+				continue
+			}
+
+			addrs, err := iface.Addrs()
+			if err != nil || len(addrs) == 0 {
+				continue
+			}
+
+			for _, addr := range addrs {
+				bridges = append(bridges, models.Bridge{
+					ID:      -1,
+					Name:    fmt.Sprintf("%s (%s)", iface.Name, addr),
+					Driver:  models.DTLIFX,
+					Address: addr.String(),
+				})
+			}
+		}
+
+		return bridges, nil
+	}
+
+	ctx2, cancel := context.WithCancel(ctx)
+	defer cancel()
+	_, err := createClient(ctx2, address, false)
+	if err != nil {
+		return nil, err
+	}
+
+	return []models.Bridge{{
+		ID:      0,
+		Name:    "Your network card",
+		Driver:  models.DTLIFX,
+		Address: address,
+		Token:   "",
+	}}, nil
+}
+
+func (d *Driver) SearchDevices(ctx context.Context, bridge models.Bridge, timeout time.Duration) ([]models.Device, error) {
+	b, err := d.ensureBridge(ctx, bridge)
+	if err != nil {
+		return nil, err
+	}
+
+	before, err := d.ListDevices(ctx, bridge)
+	if err != nil {
+		return nil, err
+	}
+
+	err = b.StartSearch()
+	if err != nil {
+		return nil, err
+	}
+
+	if timeout < time.Second/10 {
+		timeout = time.Second / 10
+	}
+
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	case <-time.After(timeout):
+	}
+
+	after, err := d.ListDevices(ctx, bridge)
+	if err != nil {
+		return nil, err
+	}
+
+	intersection := make([]models.Device, 0, 4)
+	for _, device := range after {
+		found := false
+		for _, device2 := range before {
+			if device2.InternalID == device.InternalID {
+				found = true
+				break
+			}
+		}
+
+		if !found {
+			intersection = append(intersection, device)
+		}
+	}
+
+	return intersection, nil
+}
+
+func (d *Driver) ListDevices(ctx context.Context, bridge models.Bridge) ([]models.Device, error) {
+	b, err := d.ensureBridge(ctx, bridge)
+	if err != nil {
+		return nil, err
+	}
+
+	return b.Devices(), nil
+}
+
+func (d *Driver) Publish(ctx context.Context, bridge models.Bridge, devices []models.Device) error {
+	b, err := d.ensureBridge(ctx, bridge)
+	if err != nil {
+		return err
+	}
+
+	b.Publish(devices)
+
+	return nil
+}
+
+func (d *Driver) Run(ctx context.Context, bridge models.Bridge, ch chan<- models.Event) error {
+	b, err := d.ensureBridge(ctx, bridge)
+	if err != nil {
+		return err
+	}
+
+	return b.Run(ctx, bridge.Token == "debug")
+}
+
+func (d *Driver) ensureBridge(ctx context.Context, info models.Bridge) (*Bridge, error) {
+	d.mu.Lock()
+	for _, bridge := range d.bridges {
+		if bridge.ip == info.Address {
+			d.mu.Unlock()
+			return bridge, nil
+		}
+	}
+	d.mu.Unlock()
+
+	bridge := &Bridge{
+		ip:         info.Address,
+		externalID: info.ID,
+	}
+
+	// Try to create a short-lived client to make sure it works.
+	ctx2, cancel := context.WithCancel(ctx)
+	defer cancel()
+	_, err := createClient(ctx2, info.Address, info.Token == "debug")
+	if err != nil {
+		return nil, err
+	}
+
+	// To avoid a potential duplicate, try looking for it again before inserting
+	d.mu.Lock()
+	for _, bridge := range d.bridges {
+		if bridge.ip == info.Address {
+			d.mu.Unlock()
+			return bridge, nil
+		}
+	}
+	d.bridges = append(d.bridges, bridge)
+	d.mu.Unlock()
+
+	return bridge, nil
+}

internal/drivers/lifx/packet.go

@@ -0,0 +1,191 @@
+package lifx
+
+import (
+	"encoding/binary"
+	"fmt"
+	"git.aiterp.net/lucifer/new-server/models"
+	"log"
+	"net"
+)
+
+func createPacket() Packet {
+	p := make(Packet, 36)
+	p.Reset()
+
+	return p
+}
+
+type Packet []byte
+
+func (p *Packet) Reset() {
+	p.ensureHeader()
+	copy(*p, blankHeader)
+}
+
+func (p *Packet) Size() int {
+	return int(binary.LittleEndian.Uint16((*p)[0:2]))
+}
+
+func (p *Packet) Protocol() int {
+	return int(binary.LittleEndian.Uint16((*p)[2:3]) & 0b00001111_11111111)
+}
+
+func (p *Packet) SetTagged(v bool) {
+	if v {
+		(*p)[3] |= uint8(0b00100000)
+	} else {
+		(*p)[3] &= ^uint8(0b00100000)
+	}
+}
+
+func (p *Packet) Source() uint32 {
+	return binary.LittleEndian.Uint32((*p)[4:8])
+}
+
+func (p *Packet) Target() net.HardwareAddr {
+	return net.HardwareAddr((*p)[8:14])
+}
+
+func (p *Packet) SetSource(v uint32) {
+	binary.LittleEndian.PutUint32((*p)[4:8], v)
+}
+
+func (p *Packet) CopyTargetFrom(other Packet) {
+	copy((*p)[8:14], other[8:14])
+}
+
+func (p *Packet) SetTarget(v string) error {
+	addr, err := net.ParseMAC(v)
+	if err != nil {
+		return err
+	}
+	if len(addr) != 6 {
+		return models.ErrInvalidAddress
+	}
+
+	copy((*p)[8:], addr)
+	return nil
+}
+
+func (p *Packet) SetResRequired(v bool) {
+	if v {
+		(*p)[22] |= uint8(0b00000001)
+	} else {
+		(*p)[22] &= ^uint8(0b00000001)
+	}
+}
+
+func (p *Packet) SetAckRequired(v bool) {
+	if v {
+		(*p)[22] |= uint8(0b00000010)
+	} else {
+		(*p)[22] &= ^uint8(0b00000010)
+	}
+}
+
+func (p *Packet) Sequence() uint8 {
+	return (*p)[23]
+}
+
+func (p *Packet) SetSequence(v uint8) {
+	(*p)[23] = v
+}
+
+func (p *Packet) PacketType() uint16 {
+	return binary.LittleEndian.Uint16((*p)[32:34])
+}
+
+func (p *Packet) SetRawPayload(packetType uint16, data []byte) {
+	p.ensureSize(36 + len(data))
+	copy((*p)[36:], data)
+	binary.LittleEndian.PutUint16(*p, uint16(36+len(data)))
+	binary.LittleEndian.PutUint16((*p)[32:34], packetType)
+}
+
+func (p *Packet) Payload() (res Payload, err error) {
+	switch p.PacketType() {
+	case 2:
+		res = &GetService{}
+	case 3:
+		res = &StateService{}
+		err = res.Decode((*p)[36:])
+	case 14:
+		res = &GetHostFirmware{}
+	case 15:
+		res = &StateHostFirmware{}
+		err = res.Decode((*p)[36:])
+	case 32:
+		res = &GetVersion{}
+	case 33:
+		res = &StateVersion{}
+		err = res.Decode((*p)[36:])
+	case 45:
+		res = &Acknowledgement{}
+	case 101:
+		res = &GetColor{}
+	case 102:
+		res = &SetColor{}
+		err = res.Decode((*p)[36:])
+	case 107:
+		res = &LightState{}
+		err = res.Decode((*p)[36:])
+	case 117:
+		res = &SetLightPower{}
+		err = res.Decode((*p)[36:])
+	default:
+		err = models.ErrUnrecognizedPacketType
+	}
+
+	if err != nil {
+		res = nil
+	}
+
+	if res != nil && res.PacketType() != p.PacketType() {
+		log.Println("BUG Incorrect packet type used in Packet.Payload")
+		log.Println("BUG   Payload Type:", p.PacketType())
+		log.Println("BUG   Panic Packet Type:", res.PacketType())
+		log.Println("BUG   Panic Payload:", res.String())
+	}
+
+	return
+}
+
+func (p *Packet) SetPayload(payload Payload) {
+	ackRequired, resRequired := payload.Flags()
+
+	p.SetRawPayload(payload.PacketType(), payload.Encode())
+	p.SetAckRequired(ackRequired)
+	p.SetResRequired(resRequired)
+}
+
+func (p *Packet) ensureHeader() {
+	p.ensureSize(36)
+}
+
+func (p *Packet) ensureSize(size int) {
+	if len(*p) < size {
+		newData := make([]byte, size)
+		copy(newData, *p)
+		*p = newData
+	}
+}
+
+type Payload interface {
+	fmt.Stringer
+	Decode(data []byte) error
+	Encode() []byte
+	PacketType() uint16
+	Flags() (ackRequired bool, resRequired bool)
+}
+
+var blankHeader = []byte{
+	0x24, 0x00, 0x00, 0x14,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+}

internal/drivers/lifx/payloads.go

@@ -0,0 +1,417 @@
+package lifx
+
+import (
+	"encoding/binary"
+	"fmt"
+	"git.aiterp.net/lucifer/new-server/models"
+	"math"
+	"time"
+)
+
+type GetService struct{}
+
+func (p *GetService) Decode([]byte) error {
+	return nil
+}
+
+func (p *GetService) Encode() []byte {
+	return []byte{}
+}
+
+func (p *GetService) PacketType() uint16 {
+	return 2
+}
+
+func (p *GetService) Flags() (ackRequired bool, resRequired bool) {
+	return false, true
+}
+
+func (p *GetService) String() string {
+	return "GetService()"
+}
+
+type GetVersion struct{}
+
+func (p *GetVersion) Decode([]byte) error {
+	return nil
+}
+
+func (p *GetVersion) Encode() []byte {
+	return []byte{}
+}
+
+func (p *GetVersion) PacketType() uint16 {
+	return 32
+}
+
+func (p *GetVersion) Flags() (ackRequired bool, resRequired bool) {
+	return false, true
+}
+
+func (p *GetVersion) String() string {
+	return "GetVersion()"
+}
+
+type GetHostFirmware struct{}
+
+func (p *GetHostFirmware) Decode([]byte) error {
+	return nil
+}
+
+func (p *GetHostFirmware) Encode() []byte {
+	return []byte{}
+}
+
+func (p *GetHostFirmware) PacketType() uint16 {
+	return 14
+}
+
+func (p *GetHostFirmware) Flags() (ackRequired bool, resRequired bool) {
+	return false, true
+}
+
+func (p *GetHostFirmware) String() string {
+	return "GetHostFirmware()"
+}
+
+type StateHostFirmware struct {
+	BuildTime time.Time
+	Major     uint16
+	Minor     uint16
+}
+
+func (p *StateHostFirmware) Decode(data []byte) error {
+	if len(data) < 20 {
+		return models.ErrPayloadTooShort
+	}
+
+	ts := int64(binary.LittleEndian.Uint64(data[0:8]))
+
+	p.BuildTime = time.Unix(ts/1000000000, ts%1000000000)
+	p.Major = binary.LittleEndian.Uint16(data[16:18])
+	p.Minor = binary.LittleEndian.Uint16(data[18:20])
+
+	return nil
+}
+
+func (p *StateHostFirmware) Encode() []byte {
+	var data [20]byte
+
+	binary.LittleEndian.PutUint64(data[0:8], uint64(p.BuildTime.UnixNano()))
+	binary.LittleEndian.PutUint16(data[16:18], p.Major)
+	binary.LittleEndian.PutUint16(data[18:20], p.Minor)
+
+	return data[:]
+}
+
+func (p *StateHostFirmware) PacketType() uint16 {
+	return 15
+}
+
+func (p *StateHostFirmware) Flags() (ackRequired bool, resRequired bool) {
+	return false, false
+}
+
+func (p *StateHostFirmware) String() string {
+	return fmt.Sprintf("StateHostFirmware(major=%d, minor=%d, build=%s)", p.Major, p.Minor, p.BuildTime.Format(time.RFC3339))
+}
+
+type StateVersion struct {
+	Vendor  uint32
+	Product uint32
+}
+
+func (p *StateVersion) Decode(data []byte) error {
+	if len(data) < 8 {
+		return models.ErrPayloadTooShort
+	}
+
+	p.Vendor = binary.LittleEndian.Uint32(data[0:4])
+	p.Product = binary.LittleEndian.Uint32(data[4:8])
+
+	return nil
+}
+
+func (p *StateVersion) Encode() []byte {
+	var data [12]byte
+
+	binary.LittleEndian.PutUint32(data[0:4], p.Vendor)
+	binary.LittleEndian.PutUint32(data[4:8], p.Product)
+
+	return data[:]
+}
+
+func (p *StateVersion) PacketType() uint16 {
+	return 33
+}
+
+func (p *StateVersion) Flags() (ackRequired bool, resRequired bool) {
+	return false, false
+}
+
+func (p *StateVersion) String() string {
+	return fmt.Sprintf("StateVersion(vendor=%d, product=%d)", p.Vendor, p.Product)
+}
+
+type GetColor struct{}
+
+func (p *GetColor) Decode([]byte) error {
+	return nil
+}
+
+func (p *GetColor) Encode() []byte {
+	return []byte{}
+}
+
+func (p *GetColor) PacketType() uint16 {
+	return 101
+}
+
+func (p *GetColor) Flags() (ackRequired bool, resRequired bool) {
+	return false, true
+}
+
+func (p *GetColor) String() string {
+	return "GetColor()"
+}
+
+type Acknowledgement struct{}
+
+func (p *Acknowledgement) Decode([]byte) error {
+	return nil
+}
+
+func (p *Acknowledgement) Encode() []byte {
+	return []byte{}
+}
+
+func (p *Acknowledgement) PacketType() uint16 {
+	return 45
+}
+
+func (p *Acknowledgement) Flags() (ackRequired bool, resRequired bool) {
+	return false, true
+}
+
+func (p *Acknowledgement) String() string {
+	return "Acknowledgement()"
+}
+
+type SetColor struct {
+	Hue            float64
+	Sat            float64
+	Bri            float64
+	Kelvin         int
+	TransitionTime time.Duration
+}
+
+func (p *SetColor) Decode(data []byte) error {
+	if len(data) < 13 {
+		return models.ErrPayloadTooShort
+	}
+
+	hue := binary.LittleEndian.Uint16(data[1:3])
+	sat := binary.LittleEndian.Uint16(data[3:5])
+	bri := binary.LittleEndian.Uint16(data[5:7])
+	kelvin := binary.LittleEndian.Uint16(data[7:9])
+	transitionMs := binary.LittleEndian.Uint32(data[9:13])
+
+	p.Hue = float64(hue) / (65536 / 360)
+	p.Sat = float64(sat) / 65535
+	p.Bri = float64(bri) / 65535
+	p.Kelvin = int(kelvin)
+	p.TransitionTime = time.Duration(transitionMs) * time.Millisecond
+
+	return nil
+}
+
+func (p *SetColor) Encode() []byte {
+	var data [13]byte
+
+	data[0] = 0x00 // reserved
+	binary.LittleEndian.PutUint16(data[1:3], uint16(math.Mod(p.Hue, 360)*(65536/360)))
+	binary.LittleEndian.PutUint16(data[3:5], uint16(p.Sat*65535))
+	binary.LittleEndian.PutUint16(data[5:7], uint16(p.Bri*65535))
+	binary.LittleEndian.PutUint16(data[7:9], uint16(p.Kelvin))
+	binary.LittleEndian.PutUint32(data[9:13], uint32(p.TransitionTime.Milliseconds()))
+
+	return data[:]
+}
+
+func (p *SetColor) PacketType() uint16 {
+	return 102
+}
+
+func (p *SetColor) Flags() (ackRequired bool, resRequired bool) {
+	return true, false
+}
+
+func (p *SetColor) String() string {
+	return fmt.Sprintf("SetColor(hsvk={%f, %f, %f, %d}, ttime=%s)",
+		p.Hue,
+		p.Sat,
+		p.Bri,
+		p.Kelvin,
+		p.TransitionTime,
+	)
+}
+
+type SetLightPower struct {
+	On             bool
+	TransitionTime time.Duration
+}
+
+func (p *SetLightPower) Decode(data []byte) error {
+	if len(data) < 6 {
+		return models.ErrPayloadTooShort
+	}
+
+	level := binary.LittleEndian.Uint16(data[0:2])
+	transitionMs := binary.LittleEndian.Uint32(data[2:6])
+
+	p.On = level > 0
+	p.TransitionTime = time.Duration(transitionMs) * time.Millisecond
+
+	return nil
+}
+
+func (p *SetLightPower) Encode() []byte {
+	var data [6]byte
+
+	if p.On {
+		data[0], data[1] = 0xff, 0xff
+	} else {
+		data[0], data[1] = 0x00, 0x00
+	}
+	binary.LittleEndian.PutUint32(data[2:6], uint32(p.TransitionTime.Milliseconds()))
+
+	return data[:]
+}
+
+func (p *SetLightPower) PacketType() uint16 {
+	return 117
+}
+
+func (p *SetLightPower) Flags() (ackRequired bool, resRequired bool) {
+	return true, false
+}
+
+func (p *SetLightPower) String() string {
+	return fmt.Sprintf("SetLightPower(on=%t, ttime=%s)",
+		p.On,
+		p.TransitionTime,
+	)
+}
+
+type StateService struct {
+	Service int
+	Port    int
+}
+
+func (p *StateService) String() string {
+	return fmt.Sprintf("StateService(service=%d, port=%d)", p.Service, p.Port)
+}
+
+func (p *StateService) Decode(data []byte) error {
+	if len(data) < 5 {
+		return models.ErrPayloadTooShort
+	}
+
+	p.Service = int(data[0])
+	p.Port = int(binary.LittleEndian.Uint32(data[1:5]))
+
+	return nil
+}
+
+func (p *StateService) Encode() []byte {
+	var data [5]byte
+	data[0] = uint8(p.Service)
+	binary.LittleEndian.PutUint32(data[1:5], uint32(p.Port))
+
+	return data[:]
+}
+
+func (p *StateService) PacketType() uint16 {
+	return 3
+}
+
+func (p *StateService) Flags() (ackRequired bool, resRequired bool) {
+	return false, false
+}
+
+type LightState struct {
+	Hue    float64
+	Sat    float64
+	Bri    float64
+	Kelvin int
+	On     bool
+	Label  string
+}
+
+func (p *LightState) String() string {
+	return fmt.Sprintf("LightState(hsvk=(%f, %f, %f, %d), on=%t, label=%+v)",
+		p.Hue, p.Sat, p.Bri, p.Kelvin,
+		p.On, p.Label,
+	)
+}
+
+func (p *LightState) Decode(data []byte) error {
+	if len(data) < 52 {
+		return models.ErrPayloadTooShort
+	}
+
+	hue := binary.LittleEndian.Uint16(data[0:2])
+	sat := binary.LittleEndian.Uint16(data[2:4])
+	bri := binary.LittleEndian.Uint16(data[4:6])
+	kelvin := binary.LittleEndian.Uint16(data[6:8])
+	power := binary.LittleEndian.Uint16(data[10:12])
+
+	p.Hue = float64(hue) / (65536 / 360)
+	p.Sat = float64(sat) / 65535
+	p.Bri = float64(bri) / 65535
+	p.Kelvin = int(kelvin)
+	p.On = power > 32767
+
+	p.Label = ""
+	for i, v := range data[14:46] {
+		if v == 0 {
+			p.Label = string(data[14 : 14+i])
+			break
+		}
+	}
+
+	return nil
+}
+
+func (p *LightState) Encode() []byte {
+	var data [52]byte
+
+	power := uint16(0)
+	if p.On {
+		power = 0xffff
+	}
+
+	binary.LittleEndian.PutUint16(data[0:2], uint16(math.Mod(p.Hue, 360)*(65536/360)))
+	binary.LittleEndian.PutUint16(data[2:4], uint16(p.Sat*65535))
+	binary.LittleEndian.PutUint16(data[4:6], uint16(p.Bri*65535))
+	binary.LittleEndian.PutUint16(data[6:8], uint16(p.Kelvin))
+	binary.LittleEndian.PutUint16(data[10:12], power)
+
+	label := p.Label
+	labelBytes := []byte(label)
+	for len(labelBytes) > 31 {
+		label = label[:len(label)-1]
+		labelBytes = []byte(label)
+	}
+	copy(data[14:], labelBytes)
+
+	return data[:]
+}
+
+func (p *LightState) PacketType() uint16 {
+	return 107
+}
+
+func (p *LightState) Flags() (ackRequired bool, resRequired bool) {
+	return false, false
+}

internal/drivers/lifx/state.go

@@ -0,0 +1,87 @@
+package lifx
+
+import (
+	"git.aiterp.net/lucifer/new-server/models"
+	"math"
+	"time"
+)
+
+type State struct {
+	target     string
+	externalId int
+	lightState *LightState
+	firmware   *StateHostFirmware
+	version    *StateVersion
+
+	deviceState    *models.DeviceState
+	discoveredTime time.Time
+	lightStateTime time.Time
+	requestTime    time.Time
+	updateTime     time.Time
+	acksPending    []uint8
+}
+
+func (s *State) generateUpdate() []Payload {
+	if s.deviceState == nil || s.lightState == nil {
+		return nil
+	}
+
+	results := make([]Payload, 0, 0)
+	if s.deviceState.Power != s.lightState.On {
+		results = append(results, &SetLightPower{On: s.deviceState.Power, TransitionTime: time.Millisecond * 100})
+	}
+
+	if !s.deviceState.Power {
+		return results
+	}
+
+	c := s.deviceState.Color
+	l := s.lightState
+	di := s.deviceState.Intensity
+	k := c.Kelvin
+	if k == 0 {
+		k = 4000
+	}
+	if !equalish(c.Hue, l.Hue) || !equalish(c.Saturation, l.Sat) || !equalish(di, l.Bri) || k != l.Kelvin {
+		results = append(results, &SetColor{
+			Hue:            c.Hue,
+			Sat:            c.Saturation,
+			Bri:            di,
+			Kelvin:         k,
+			TransitionTime: time.Millisecond * 150,
+		})
+	}
+
+	return results
+}
+
+func (s *State) handleAck(seq uint8) {
+	for i, pendingAck := range s.acksPending {
+		if pendingAck == seq {
+			s.acksPending = append(s.acksPending[:i], s.acksPending[i+1:]...)
+			break
+		}
+	}
+
+	if len(s.acksPending) == 0 {
+		s.lightStateTime = time.Now()
+
+		prevLabel := ""
+		if s.lightState != nil {
+			prevLabel = s.lightState.Label
+		}
+
+		s.lightState = &LightState{
+			Hue:    s.deviceState.Color.Hue,
+			Sat:    s.deviceState.Color.Saturation,
+			Bri:    s.deviceState.Intensity,
+			Kelvin: s.deviceState.Color.Kelvin,
+			On:     s.deviceState.Power,
+			Label:  prevLabel,
+		}
+	}
+}
+
+func equalish(a, b float64) bool {
+	return math.Abs(a-b) < 0.005
+}

models/bridge.go

@@ -22,6 +22,7 @@ type DriverKind string
 var (
 	DTHue      DriverKind = "Hue"
 	DTNanoLeaf DriverKind = "Nanoleaf"
+	DTLIFX     DriverKind = "LIFX"
 )
 
 var ValidDriverKinds = []DriverKind{

models/colorvalue.go

@@ -35,7 +35,7 @@ func ParseColorValue(raw string) (ColorValue, error) {
 		return ColorValue{}, ErrBadInput
 	}
 
-	if tokens[0] == "kelvin" {
+	if tokens[0] == "kelvin" || tokens[0] == "k" {
 		parsedPart, err := strconv.Atoi(tokens[1])
 		if err != nil {
 			return ColorValue{}, ErrBadInput
@@ -59,5 +59,25 @@ func ParseColorValue(raw string) (ColorValue, error) {
 		return ColorValue{Hue: math.Mod(part1, 360), Saturation: math.Min(math.Max(part2, 0), 1)}, nil
 	}
 
+	if tokens[0] == "hsk" {
+		parts := strings.Split(tokens[1], ",")
+		if len(parts) < 3 {
+			return ColorValue{}, ErrUnknownColorFormat
+		}
+
+		part1, err1 := strconv.ParseFloat(parts[0], 64)
+		part2, err2 := strconv.ParseFloat(parts[1], 64)
+		part3, err3 := strconv.Atoi(parts[2])
+		if err1 != nil || err2 != nil || err3 != nil {
+			return ColorValue{}, ErrBadInput
+		}
+
+		return ColorValue{
+			Hue:        math.Mod(part1, 360),
+			Saturation: math.Min(math.Max(part2, 0), 1),
+			Kelvin:     part3,
+		}, nil
+	}
+
 	return ColorValue{}, ErrUnknownColorFormat
 }

models/device.go

@@ -50,6 +50,7 @@ type DeviceRepository interface {
 var (
 	DCPower              DeviceCapability = "Power"
 	DCColorHS            DeviceCapability = "ColorHS"
+	DCColorHSK           DeviceCapability = "ColorHSK"
 	DCColorKelvin        DeviceCapability = "ColorKelvin"
 	DCButtons            DeviceCapability = "Buttons"
 	DCPresence           DeviceCapability = "Presence"
@@ -89,10 +90,12 @@ func (d *Device) Validate() error {
 	return nil
 }
 
-func (d *Device) HasCapability(capacity DeviceCapability) bool {
+func (d *Device) HasCapability(capabilities ...DeviceCapability) bool {
 	for _, c := range d.Capabilities {
-		if c == capacity {
-			return true
+		for _, c2 := range capabilities {
+			if c == c2 {
+				return true
+			}
 		}
 	}
 
@@ -110,7 +113,7 @@ func (d *Device) SetState(newState NewDeviceState) error {
 			return err
 		}
 
-		if (parsed.IsKelvin() && d.HasCapability(DCColorKelvin)) || (parsed.IsHueSat() && d.HasCapability(DCColorHS)) {
+		if (parsed.IsKelvin() && d.HasCapability(DCColorKelvin, DCColorHSK)) || (parsed.IsHueSat() && d.HasCapability(DCColorHS)) {
 			d.State.Color = parsed
 		}
 	}

models/errors.go

@@ -15,3 +15,10 @@ var ErrIncorrectToken = errors.New("driver is not accepting authentication infor
 var ErrUnexpectedResponse = errors.New("driver api returned unexpected response (wrong driver selected?)")
 var ErrBridgeSearchFailed = errors.New("bridge search failed")
 var ErrAddressOnlyDryRunnable = errors.New("this address may only be used for a dry run")
+
+var ErrInvalidAddress = errors.New("invalid mac address")
+var ErrPayloadTooShort = errors.New("payload too short")
+var ErrInvalidPacketSize = errors.New("invalid packet size")
+var ErrReadTimeout = errors.New("read timeout")
+var ErrUnrecognizedPacketType = errors.New("packet type not recognized")
+var ErrBridgeRunningRequired = errors.New("this operation cannot be performed when bridge is not running")