Merge pull request #4 from jwetzell/chore/organize-types

move types out of decoders package

.github/workflows/test_decoders.yaml

@@ -0,0 +1,31 @@
+name: "Test Decoders"
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+    paths:
+      - 'internal/decoders/**'
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  test_decoders:
+    name: "test decoders"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version-file: "./go.mod"
+
+      - name: Test
+        run: go test -cover -coverprofile=decoders_coverage.txt ./internal/decoders/...
+
+      - name: Archive code coverage results
+        uses: actions/upload-artifact@v4
+        with:
+          name: decoders-code-coverage
+          path: decoders_coverage.txt

.github/workflows/test_encoders.yaml

@@ -0,0 +1,31 @@
+name: "Test Encoders"
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+    paths:
+      - 'internal/encoders/**'
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  test_encoders:
+    name: "test encoders"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version-file: "./go.mod"
+
+      - name: Test
+        run: go test -cover -coverprofile=encoders_coverage.txt ./internal/encoders/...
+
+      - name: Archive code coverage results
+        uses: actions/upload-artifact@v4
+        with:
+          name: encoders-code-coverage
+          path: encoders_coverage.txt

constants.go

@@ -1,5 +1,7 @@
 package psn
 
-var PACKET_HEADER_SIZE = 16
+const (
-var MAX_UDP_PACKET_SIZE = 1500
+	PACKET_HEADER_SIZE  = 16
-var CHUNK_HEADER_SIZE = 4
+	MAX_UDP_PACKET_SIZE = 1500
+	CHUNK_HEADER_SIZE   = 4
+)

decoder.go

@@ -1,25 +1,28 @@
 package psn
 
-import "github.com/jwetzell/psn-go/internal/decoders"
+import (
+	"github.com/jwetzell/psn-go/internal/chunks"
+	"github.com/jwetzell/psn-go/internal/decoders"
+)
 
 type Decoder struct {
-	lastInfoPacketHeader *decoders.PacketHeaderChunk
+	lastInfoPacketHeader *chunks.PacketHeaderChunk
-	lastDataPacketHeader *decoders.PacketHeaderChunk
+	lastDataPacketHeader *chunks.PacketHeaderChunk
-	infoPacketFrames     map[uint8][]decoders.InfoPacketChunk
+	infoPacketFrames     map[uint8][]chunks.InfoPacketChunk
-	dataPacketFrames     map[uint8][]decoders.DataPacketChunk
+	dataPacketFrames     map[uint8][]chunks.DataPacketChunk
 	Trackers             map[uint16]*Tracker
 	SystemName           string
 }
 
 func NewDecoder() *Decoder {
 	var decoder Decoder
-	decoder.infoPacketFrames = map[uint8][]decoders.InfoPacketChunk{}
+	decoder.infoPacketFrames = map[uint8][]chunks.InfoPacketChunk{}
-	decoder.dataPacketFrames = map[uint8][]decoders.DataPacketChunk{}
+	decoder.dataPacketFrames = map[uint8][]chunks.DataPacketChunk{}
 	decoder.Trackers = map[uint16]*Tracker{}
 	return &decoder
 }
 
-func (d *Decoder) updateInfo(framePackets []decoders.InfoPacketChunk) {
+func (d *Decoder) updateInfo(framePackets []chunks.InfoPacketChunk) {
 	for _, framePacket := range framePackets {
 		d.SystemName = framePacket.Data.SystemName.Data.SystemName
 		for _, infoTrackerChunk := range framePacket.Data.TrackerList.Data.Trackers {
@@ -34,7 +37,7 @@ func (d *Decoder) updateInfo(framePackets []decoders.InfoPacketChunk) {
 	}
 }
 
-func (d *Decoder) updateData(framePackets []decoders.DataPacketChunk) {
+func (d *Decoder) updateData(framePackets []chunks.DataPacketChunk) {
 	for _, framePacket := range framePackets {
 		for _, dataTrackerChunk := range framePacket.Data.TrackerList.Data.Trackers {
 			tracker, ok := d.Trackers[dataTrackerChunk.Chunk.Header.Id]
@@ -48,17 +51,24 @@ func (d *Decoder) updateData(framePackets []decoders.DataPacketChunk) {
 	}
 }
 
-func (d *Decoder) Decode(bytes []byte) {
+func (d *Decoder) Decode(bytes []byte) error {
-	chunk := decoders.DecodeChunk(bytes)
+	chunk, err := decoders.DecodeChunk(bytes)
+
+	if err != nil {
+		return err
+	}
 
 	if chunk.Header.Id == 0x6756 {
-		infoPacket := decoders.DecodeInfoPacketChunk(bytes)
+		infoPacket, err := decoders.DecodeInfoPacketChunk(bytes)
+		if err != nil {
+			return err
+		}
 		currentInfoPacketHeader := infoPacket.Data.PacketHeader
 
 		_, ok := d.infoPacketFrames[currentInfoPacketHeader.Data.FrameId]
 
 		if !ok {
-			d.infoPacketFrames[currentInfoPacketHeader.Data.FrameId] = []decoders.InfoPacketChunk{}
+			d.infoPacketFrames[currentInfoPacketHeader.Data.FrameId] = []chunks.InfoPacketChunk{}
 		}
 		d.infoPacketFrames[currentInfoPacketHeader.Data.FrameId] = append(d.infoPacketFrames[currentInfoPacketHeader.Data.FrameId], infoPacket)
 
@@ -67,13 +77,16 @@ func (d *Decoder) Decode(bytes []byte) {
 			delete(d.infoPacketFrames, currentInfoPacketHeader.Data.FrameId)
 		}
 	} else if chunk.Header.Id == 0x6755 {
-		dataPacket := decoders.DecodeDataPacketChunk(bytes)
+		dataPacket, err := decoders.DecodeDataPacketChunk(bytes)
+		if err != nil {
+			return err
+		}
 		currentInfoPacketHeader := dataPacket.Data.PacketHeader
 
 		_, ok := d.dataPacketFrames[currentInfoPacketHeader.Data.FrameId]
 
 		if !ok {
-			d.dataPacketFrames[currentInfoPacketHeader.Data.FrameId] = []decoders.DataPacketChunk{}
+			d.dataPacketFrames[currentInfoPacketHeader.Data.FrameId] = []chunks.DataPacketChunk{}
 		}
 		d.dataPacketFrames[currentInfoPacketHeader.Data.FrameId] = append(d.dataPacketFrames[currentInfoPacketHeader.Data.FrameId], dataPacket)
 
@@ -82,4 +95,5 @@ func (d *Decoder) Decode(bytes []byte) {
 			delete(d.dataPacketFrames, currentInfoPacketHeader.Data.FrameId)
 		}
 	}
+	return nil
 }

encoder.go

@@ -59,7 +59,6 @@ func (e *Encoder) GetInfoPackets(timestamp uint64, trackers []Tracker) [][]byte
 }
 
 func (e *Encoder) GetDataPackets(timestamp uint64, trackers []Tracker) [][]byte {
-
 	trackerChunks := [][]byte{}
 
 	for _, tracker := range trackers {

examples/benchmark/main.go

@@ -25,7 +25,6 @@ func getNTrackers(n int) []psn.Tracker {
 }
 
 func main() {
-
 	testSizes := []int{1, 10, 100, 1000}
 	encoder := psn.Encoder{
 		SystemName:  "test encoder",
@@ -39,7 +38,6 @@ func main() {
 			benchmark(trackerCount, iterations, encoder, *decoder)
 		}
 	}
-
 }
 
 type BenchmarkResults struct {

examples/decode/main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"log/slog"
 
 	"github.com/jwetzell/psn-go"
 )
@@ -10,18 +11,28 @@ import (
 func main() {
 	decoder := psn.NewDecoder()
 
-	infoPacketBytes := []byte{0x56, 0x67, 0x34, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
+	infoPacketBytes := []byte{
+		0x56, 0x67, 0x34, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
 		0x01, 0x01, 0x00, 0x0b, 0x00, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x4e, 0x61, 0x6d, 0x65, 0x02, 0x00, 0x11,
-		0x80, 0x01, 0x00, 0x0d, 0x80, 0x00, 0x00, 0x09, 0x00, 0x54, 0x72, 0x61, 0x63, 0x6b, 0x65, 0x72, 0x20, 0x31}
+		0x80, 0x01, 0x00, 0x0d, 0x80, 0x00, 0x00, 0x09, 0x00, 0x54, 0x72, 0x61, 0x63, 0x6b, 0x65, 0x72, 0x20, 0x31,
+	}
 
-	dataPacketBytes := []byte{0x55, 0x67, 0x28, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
+	dataPacketBytes := []byte{
+		0x55, 0x67, 0x28, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
 		0x01, 0x01, 0x00, 0x14, 0x80, 0x01, 0x00, 0x10, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x00, 0x00,
-		0x80, 0x3f, 0x00, 0x00, 0x80, 0x3f}
+		0x80, 0x3f, 0x00, 0x00, 0x80, 0x3f,
+	}
 
-	decoder.Decode(infoPacketBytes)
+	err := decoder.Decode(infoPacketBytes)
-	decoder.Decode(dataPacketBytes)
+	if err != nil {
+		slog.Error("error decoding", "err", err)
+	}
+	err = decoder.Decode(dataPacketBytes)
+	if err != nil {
+		slog.Error("error decoding", "err", err)
+	}
 
-	fmt.Printf("decoded: %+v\n", decoder.SystemName)
+	fmt.Printf("decoded system name: %s\n", decoder.SystemName)
 
 	trackers, err := json.MarshalIndent(decoder.Trackers, "", "  ")
 	if err != nil {
@@ -29,5 +40,5 @@ func main() {
 		return
 	}
 
-	fmt.Println(string(trackers))
+	fmt.Printf("decoded trackers: \n%s\n", string(trackers))
 }

examples/encode/main.go

@@ -7,7 +7,6 @@ import (
 )
 
 func main() {
-
 	encoder := psn.Encoder{
 		SystemName:  "Server Name",
 		VersionHigh: 2,
@@ -41,5 +40,4 @@ func main() {
 		fmt.Printf("%v\n", infoPacket)
 
 	}
-
 }

examples/psn_client/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"log/slog"
 	"net"
 	"time"
 
@@ -11,14 +12,13 @@ import (
 func main() {
 	addr, err := net.ResolveUDPAddr("udp", "236.10.10.10:56565")
 	if err != nil {
-		fmt.Printf("Error %v\n", err)
+		slog.Error("error making UDP address", "err", err)
 		return
 	}
 
 	client, err := net.ListenMulticastUDP("udp", nil, addr)
-
 	if err != nil {
-		fmt.Printf("Error %v\n", err)
+		slog.Error("error listening to UDP", "err", err)
 		return
 	}
 	defer client.Close()
@@ -31,13 +31,15 @@ func main() {
 		buffer := make([]byte, 2048)
 
 		length, _, err := client.ReadFromUDP(buffer)
-
 		if err != nil {
-			fmt.Printf("Error %v", err)
+			slog.Error("error reading from UDP", "err", err)
 		}
 
 		if length > 0 {
-			decoder.Decode(buffer)
+			err := decoder.Decode(buffer)
+			if err != nil {
+				slog.Error("error decoding", "err", err)
+			}
 		}
 
 		if time.Now().UnixMilli()-lastPrintMillis > 1000 {

examples/psn_server/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"log/slog"
 	"math"
 	"net"
 	"time"
@@ -11,7 +12,6 @@ import (
 
 func main() {
 	client, err := net.Dial("udp", "236.10.10.10:56565")
-
 	if err != nil {
 		fmt.Printf("Error %v\n", err)
 		return
@@ -46,7 +46,7 @@ func main() {
 
 	for {
 		if (time.Now().UnixMilli() - lastInfoMillis) > 500 {
-			fmt.Println("Sending Info Packets")
+			slog.Info("Sending Info Packets")
 			infoPackets := encoder.GetInfoPackets(uint64(timestamp), trackers)
 			for _, infoPacket := range infoPackets {
 				client.Write(infoPacket)
@@ -71,7 +71,7 @@ func main() {
 				trackers[index].SetTimestamp(uint64(timestamp))
 			}
 
-			fmt.Println("Sending Data Packets")
+			slog.Info("Sending Data Packets")
 			dataPackets := encoder.GetDataPackets(uint64(timestamp), trackers)
 			for _, DataPacket := range dataPackets {
 				client.Write(DataPacket)
@@ -81,5 +81,4 @@ func main() {
 		}
 
 	}
-
 }

go.mod

@@ -1,3 +1,3 @@
 module github.com/jwetzell/psn-go
 
-go 1.23.1
+go 1.25.3

internal/chunks/chunk.go

@@ -0,0 +1,12 @@
+package chunks
+
+type ChunkHeader struct {
+	Id           uint16
+	DataLen      uint16
+	HasSubchunks bool
+}
+
+type Chunk struct {
+	ChunkData []byte
+	Header    ChunkHeader
+}

internal/chunks/data_packet_chunk.go

@@ -0,0 +1,11 @@
+package chunks
+
+type DataPacketChunkData struct {
+	PacketHeader *PacketHeaderChunk
+	TrackerList  *DataTrackerListChunk
+}
+
+type DataPacketChunk struct {
+	Data  DataPacketChunkData
+	Chunk Chunk
+}

internal/chunks/data_tracker_chunk.go

@@ -0,0 +1,16 @@
+package chunks
+
+type DataTrackerChunkData struct {
+	Pos       *DataTrackerXYZChunk
+	Speed     *DataTrackerXYZChunk
+	Ori       *DataTrackerXYZChunk
+	Status    *DataTrackerStatusChunk
+	Accel     *DataTrackerXYZChunk
+	TrgtPos   *DataTrackerXYZChunk
+	Timestamp *DataTrackerTimestampChunk
+}
+
+type DataTrackerChunk struct {
+	Data  DataTrackerChunkData
+	Chunk Chunk
+}

internal/chunks/data_tracker_list_chunk.go

@@ -0,0 +1,9 @@
+package chunks
+
+type DataTrackerListChunkData struct {
+	Trackers []DataTrackerChunk
+}
+type DataTrackerListChunk struct {
+	Chunk Chunk
+	Data  DataTrackerListChunkData
+}

internal/chunks/data_tracker_status_chunk.go

@@ -0,0 +1,10 @@
+package chunks
+
+type DataTrackerStatusChunkData struct {
+	Validity float32
+}
+
+type DataTrackerStatusChunk struct {
+	Chunk Chunk
+	Data  DataTrackerStatusChunkData
+}

internal/chunks/data_tracker_timestamp_chunk.go

@@ -0,0 +1,10 @@
+package chunks
+
+type DataTrackerTimestampChunkData struct {
+	Timestamp uint64
+}
+
+type DataTrackerTimestampChunk struct {
+	Chunk Chunk
+	Data  DataTrackerTimestampChunkData
+}

internal/chunks/data_tracker_xyz_chunk.go

@@ -0,0 +1,12 @@
+package chunks
+
+type DataTrackerXYZChunkData struct {
+	X float32
+	Y float32
+	Z float32
+}
+
+type DataTrackerXYZChunk struct {
+	Chunk Chunk
+	Data  DataTrackerXYZChunkData
+}

internal/chunks/info_packet_chunk.go

@@ -0,0 +1,12 @@
+package chunks
+
+type InfoPacketChunkData struct {
+	PacketHeader *PacketHeaderChunk
+	SystemName   *InfoSystemNameChunk
+	TrackerList  *InfoTrackerListChunk
+}
+
+type InfoPacketChunk struct {
+	Data  InfoPacketChunkData
+	Chunk Chunk
+}

internal/chunks/info_system_name_chunk.go

@@ -0,0 +1,10 @@
+package chunks
+
+type InfoSystemNameChunkData struct {
+	SystemName string
+}
+
+type InfoSystemNameChunk struct {
+	Data  InfoSystemNameChunkData
+	Chunk Chunk
+}

internal/chunks/info_tracker_chunk.go

@@ -0,0 +1,10 @@
+package chunks
+
+type InfoTrackerChunkData struct {
+	TrackerName *InfoTrackerNameChunk
+}
+
+type InfoTrackerChunk struct {
+	Data  InfoTrackerChunkData
+	Chunk Chunk
+}

internal/chunks/info_tracker_list_chunk.go

@@ -0,0 +1,10 @@
+package chunks
+
+type InfoTrackerListChunkData struct {
+	Trackers []InfoTrackerChunk
+}
+
+type InfoTrackerListChunk struct {
+	Chunk Chunk
+	Data  InfoTrackerListChunkData
+}

internal/chunks/info_tracker_name_chunk.go

@@ -0,0 +1,10 @@
+package chunks
+
+type InfoTrackerNameChunkData struct {
+	TrackerName string
+}
+
+type InfoTrackerNameChunk struct {
+	Data  InfoTrackerNameChunkData
+	Chunk Chunk
+}

internal/chunks/packet_header_chunk.go

@@ -0,0 +1,14 @@
+package chunks
+
+type PacketHeaderChunkData struct {
+	PacketTimestamp  uint64
+	VersionHigh      uint8
+	VersionLow       uint8
+	FrameId          uint8
+	FramePacketCount uint8
+}
+
+type PacketHeaderChunk struct {
+	Chunk Chunk
+	Data  PacketHeaderChunkData
+}

internal/decoders/chunk.go

@@ -2,20 +2,17 @@ package decoders
 
 import (
 	"encoding/binary"
+	"errors"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
 )
 
-type ChunkHeader struct {
+func DecodeChunk(bytes []byte) (chunks.Chunk, error) {
-	Id           uint16
-	DataLen      uint16
-	HasSubchunks bool
-}
 
-type Chunk struct {
+	if len(bytes) < 4 {
-	Header    ChunkHeader
+		return chunks.Chunk{}, errors.New("chunk must be at least 4 bytes")
-	ChunkData []byte
+	}
-}
 
-func DecodeChunk(bytes []byte) Chunk {
 	id := binary.LittleEndian.Uint16(bytes[0:2])
 	lengthAndFlag := binary.LittleEndian.Uint16(bytes[2:4])
 
@@ -27,7 +24,7 @@ func DecodeChunk(bytes []byte) Chunk {
 		data_len = data_len - 32768
 	}
 
-	header := ChunkHeader{
+	header := chunks.ChunkHeader{
 		Id:           id,
 		DataLen:      data_len,
 		HasSubchunks: has_subchunks,
@@ -35,9 +32,8 @@ func DecodeChunk(bytes []byte) Chunk {
 
 	chunk_data := bytes[4 : 4+header.DataLen]
 
-	return Chunk{
+	return chunks.Chunk{
 		Header:    header,
 		ChunkData: chunk_data,
-	}
+	}, nil
-
 }

internal/decoders/chunk_test.go

@@ -3,53 +3,68 @@ package decoders
 import (
 	"fmt"
 	"reflect"
+	"strings"
 	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
 )
 
-func TestChunkDecoding(t *testing.T) {
+func TestGoodChunkDecoding(t *testing.T) {
-
 	testCases := []struct {
 		description string
 		bytes       []byte
-		expected    Chunk
+		expected    chunks.Chunk
 	}{
 		{
 			description: "info packet",
-			bytes: []byte{0x56, 0x67, 0x34, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
+			bytes: []byte{
+				0x56, 0x67, 0x34, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
 				0x01, 0x01, 0x00, 0x0b, 0x00, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x4e, 0x61, 0x6d, 0x65, 0x02, 0x00, 0x11,
-				0x80, 0x01, 0x00, 0x0d, 0x80, 0x00, 0x00, 0x09, 0x00, 0x54, 0x72, 0x61, 0x63, 0x6b, 0x65, 0x72, 0x20, 0x31},
+				0x80, 0x01, 0x00, 0x0d, 0x80, 0x00, 0x00, 0x09, 0x00, 0x54, 0x72, 0x61, 0x63, 0x6b, 0x65, 0x72, 0x20, 0x31,
-			expected: Chunk{
+			},
-				Header: ChunkHeader{
+			expected: chunks.Chunk{
+				Header: chunks.ChunkHeader{
 					Id:           uint16(26454),
 					DataLen:      uint16(52),
 					HasSubchunks: true,
 				},
-				ChunkData: []byte{0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
+				ChunkData: []byte{
+					0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
 					0x01, 0x01, 0x00, 0x0b, 0x00, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x4e, 0x61, 0x6d, 0x65, 0x02, 0x00, 0x11,
-					0x80, 0x01, 0x00, 0x0d, 0x80, 0x00, 0x00, 0x09, 0x00, 0x54, 0x72, 0x61, 0x63, 0x6b, 0x65, 0x72, 0x20, 0x31},
+					0x80, 0x01, 0x00, 0x0d, 0x80, 0x00, 0x00, 0x09, 0x00, 0x54, 0x72, 0x61, 0x63, 0x6b, 0x65, 0x72, 0x20, 0x31,
+				},
 			},
 		},
 		{
 			description: "data packet",
-			bytes: []byte{0x55, 0x67, 0x28, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
+			bytes: []byte{
+				0x55, 0x67, 0x28, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
 				0x01, 0x01, 0x00, 0x14, 0x80, 0x01, 0x00, 0x10, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x00, 0x00,
-				0x80, 0x3f, 0x00, 0x00, 0x80, 0x3f},
+				0x80, 0x3f, 0x00, 0x00, 0x80, 0x3f,
-			expected: Chunk{
+			},
-				Header: ChunkHeader{
+			expected: chunks.Chunk{
+				Header: chunks.ChunkHeader{
 					Id:           uint16(26453),
 					DataLen:      uint16(40),
 					HasSubchunks: true,
 				},
-				ChunkData: []byte{0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
+				ChunkData: []byte{
+					0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
 					0x01, 0x01, 0x00, 0x14, 0x80, 0x01, 0x00, 0x10, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x00, 0x00,
-					0x80, 0x3f, 0x00, 0x00, 0x80, 0x3f},
+					0x80, 0x3f, 0x00, 0x00, 0x80, 0x3f,
+				},
 			},
 		},
 	}
 
 	for _, testCase := range testCases {
 
-		actual := DecodeChunk(testCase.bytes)
+		actual, err := DecodeChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
 
 		if !reflect.DeepEqual(actual, testCase.expected) {
 			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
@@ -58,3 +73,33 @@ func TestChunkDecoding(t *testing.T) {
 		}
 	}
 }
+
+func TestBadChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description        string
+		bytes              []byte
+		errorShouldContain string
+	}{
+		{
+			description:        "empty packet",
+			bytes:              []byte{},
+			errorShouldContain: "must be at least 4 bytes",
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		_, err := DecodeChunk(testCase.bytes)
+
+		if err == nil {
+			t.Errorf("Test '%s' should have failed fail to decode chunk properly", testCase.description)
+		}
+
+		if !strings.Contains(err.Error(), testCase.errorShouldContain) {
+			t.Errorf("Test '%s' did not return the correct error", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.errorShouldContain)
+			fmt.Printf("actual: %v\n", err.Error())
+		}
+
+	}
+}

internal/decoders/data_packet_chunk.go

@@ -3,37 +3,39 @@ package decoders
 import (
 	"encoding/binary"
 	"log/slog"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
 )
 
-type DataPacketChunkData struct {
+func DecodeDataPacketChunk(bytes []byte) (chunks.DataPacketChunk, error) {
-	PacketHeader *PacketHeaderChunk
+	chunk, err := DecodeChunk(bytes)
-	TrackerList  *DataTrackerListChunk
-}
 
-type DataPacketChunk struct {
+	if err != nil {
-	Chunk Chunk
+		return chunks.DataPacketChunk{}, err
-	Data  DataPacketChunkData
+	}
-}
 
-func DecodeDataPacketChunk(bytes []byte) DataPacketChunk {
+	data := chunks.DataPacketChunkData{}
-	chunk := DecodeChunk(bytes)
-	data := DataPacketChunkData{}
 
 	if chunk.Header.HasSubchunks && chunk.ChunkData != nil && chunk.Header.DataLen > 0 {
 		offset := 0
 
 		for offset < int(chunk.Header.DataLen) {
-
 			switch id := binary.LittleEndian.Uint16(chunk.ChunkData[offset : offset+2]); id {
-			case 0:
+			case 0x0000:
-				packet_header := DecodePacketHeaderChunk(chunk.ChunkData[offset:])
+				packet_header, err := DecodePacketHeaderChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.DataPacketChunk{}, err
+				}
 				data.PacketHeader = &packet_header
 				offset += 4
 				if packet_header.Chunk.Header.DataLen > 0 {
 					offset = offset + int(packet_header.Chunk.Header.DataLen)
 				}
-			case 1:
+			case 0x0001:
-				tracker_list := DecodeDataTrackerListChunk(chunk.ChunkData[offset:])
+				tracker_list, err := DecodeDataTrackerListChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.DataPacketChunk{}, err
+				}
 				data.TrackerList = &tracker_list
 				offset += 4
 				if tracker_list.Chunk.Header.DataLen > 0 {
@@ -46,8 +48,9 @@ func DecodeDataPacketChunk(bytes []byte) DataPacketChunk {
 		}
 	}
 
-	return DataPacketChunk{
+	return chunks.DataPacketChunk{
-		Chunk: chunk,
+			Chunk: chunk,
-		Data:  data,
+			Data:  data,
-	}
+		},
+		nil
 }

internal/decoders/data_packet_chunk_test.go

@@ -0,0 +1,172 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodDataPacketChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.DataPacketChunk
+	}{
+		{
+			description: "DataPacketChunk",
+			bytes: []byte{
+				85, 103, 124, 128, 0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123, 1, 0, 104, 128, 1, 0, 100, 128, 0, 0,
+				12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 2, 0, 12,
+				0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64,
+				0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+			},
+			expected: chunks.DataPacketChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{
+						0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123, 1, 0, 104, 128, 1, 0, 100, 128, 0, 0, 12, 0, 0, 0,
+						128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 2, 0, 12, 0, 0, 0,
+						128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0,
+						64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+					},
+					Header: chunks.ChunkHeader{
+						DataLen: 124, Id: 26453, HasSubchunks: true,
+					},
+				},
+				Data: chunks.DataPacketChunkData{
+					PacketHeader: &chunks.PacketHeaderChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123},
+							Header:    chunks.ChunkHeader{DataLen: 12, Id: 0, HasSubchunks: false},
+						},
+						Data: chunks.PacketHeaderChunkData{
+							PacketTimestamp:  1234567890,
+							VersionHigh:      2,
+							VersionLow:       3,
+							FrameId:          1,
+							FramePacketCount: 123,
+						},
+					},
+					TrackerList: &chunks.DataTrackerListChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{
+								1, 0, 100, 128, 0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0,
+								0, 64, 0, 0, 64, 64, 2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4,
+								0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64,
+								6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+							},
+							Header: chunks.ChunkHeader{DataLen: 104, Id: 1, HasSubchunks: true},
+						},
+						Data: chunks.DataTrackerListChunkData{
+							Trackers: []chunks.DataTrackerChunk{
+								chunks.DataTrackerChunk{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{
+											0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0,
+											0, 64, 64, 2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0,
+											12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64,
+											64, 6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+										},
+										Header: chunks.ChunkHeader{DataLen: 100, Id: 1, HasSubchunks: true},
+									},
+									Data: chunks.DataTrackerChunkData{
+										Pos: &chunks.DataTrackerXYZChunk{
+											Chunk: chunks.Chunk{
+												ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+												Header:    chunks.ChunkHeader{DataLen: 12, Id: 0, HasSubchunks: false},
+											},
+											Data: chunks.DataTrackerXYZChunkData{
+												X: 1.0,
+												Y: 2.0,
+												Z: 3.0,
+											},
+										},
+										Speed: &chunks.DataTrackerXYZChunk{
+											Chunk: chunks.Chunk{
+												ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+												Header:    chunks.ChunkHeader{DataLen: 12, Id: 1, HasSubchunks: false},
+											},
+											Data: chunks.DataTrackerXYZChunkData{
+												X: 1.0,
+												Y: 2.0,
+												Z: 3.0,
+											},
+										},
+										Ori: &chunks.DataTrackerXYZChunk{
+											Chunk: chunks.Chunk{
+												ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+												Header:    chunks.ChunkHeader{DataLen: 12, Id: 2, HasSubchunks: false},
+											},
+											Data: chunks.DataTrackerXYZChunkData{
+												X: 1.0,
+												Y: 2.0,
+												Z: 3.0,
+											},
+										},
+										Status: &chunks.DataTrackerStatusChunk{
+											Chunk: chunks.Chunk{
+												ChunkData: []byte{0, 0, 128, 63},
+												Header:    chunks.ChunkHeader{DataLen: 4, Id: 3, HasSubchunks: false},
+											},
+											Data: chunks.DataTrackerStatusChunkData{
+												Validity: 1.0,
+											},
+										},
+										Accel: &chunks.DataTrackerXYZChunk{
+											Chunk: chunks.Chunk{
+												ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+												Header:    chunks.ChunkHeader{DataLen: 12, Id: 4, HasSubchunks: false},
+											},
+											Data: chunks.DataTrackerXYZChunkData{
+												X: 1.0,
+												Y: 2.0,
+												Z: 3.0,
+											},
+										},
+										TrgtPos: &chunks.DataTrackerXYZChunk{
+											Chunk: chunks.Chunk{
+												ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+												Header:    chunks.ChunkHeader{DataLen: 12, Id: 5, HasSubchunks: false},
+											},
+											Data: chunks.DataTrackerXYZChunkData{
+												X: 1.0,
+												Y: 2.0,
+												Z: 3.0,
+											},
+										},
+										Timestamp: &chunks.DataTrackerTimestampChunk{
+											Chunk: chunks.Chunk{
+												ChunkData: []byte{210, 2, 150, 73, 0, 0, 0, 0},
+												Header:    chunks.ChunkHeader{DataLen: 8, Id: 6, HasSubchunks: false},
+											},
+											Data: chunks.DataTrackerTimestampChunkData{
+												Timestamp: 1234567890,
+											},
+										},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeDataPacketChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %+v\n", testCase.expected)
+			fmt.Printf("actual: %+v\n", actual)
+		}
+	}
+}

internal/decoders/data_tracker_chunk.go

@@ -3,77 +3,89 @@ package decoders
 import (
 	"encoding/binary"
 	"log/slog"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
 )
 
-type DataTrackerChunkData struct {
+func DecodeDataTrackerChunk(bytes []byte) (chunks.DataTrackerChunk, error) {
-	Pos       *DataTrackerXYZChunk
+	chunk, err := DecodeChunk(bytes)
-	Speed     *DataTrackerXYZChunk
-	Ori       *DataTrackerXYZChunk
-	Status    *DataTrackerStatusChunk
-	Accel     *DataTrackerXYZChunk
-	TrgtPos   *DataTrackerXYZChunk
-	Timestamp *DataTrackerTimestampChunk
-}
 
-type DataTrackerChunk struct {
+	if err != nil {
-	Chunk Chunk
+		return chunks.DataTrackerChunk{}, err
-	Data  DataTrackerChunkData
+	}
-}
 
-func DecodeDataTrackerChunk(bytes []byte) DataTrackerChunk {
+	data := chunks.DataTrackerChunkData{}
-	chunk := DecodeChunk(bytes)
-	data := DataTrackerChunkData{}
 
 	if chunk.Header.HasSubchunks && chunk.ChunkData != nil && chunk.Header.DataLen > 0 {
 		offset := 0
 
 		for offset < int(chunk.Header.DataLen) {
-
 			switch id := binary.LittleEndian.Uint16(chunk.ChunkData[offset : offset+2]); id {
-			case 0:
+			case 0x0000:
-				pos := DecodeDataTrackerXYZChunk(chunk.ChunkData[offset:])
+				pos, err := DecodeDataTrackerXYZChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.DataTrackerChunk{}, err
+				}
 				data.Pos = &pos
 				offset += 4
 				if data.Pos.Chunk.Header.DataLen > 0 {
 					offset = offset + int(data.Pos.Chunk.Header.DataLen)
 				}
-			case 1:
+			case 0x0001:
-				speed := DecodeDataTrackerXYZChunk(chunk.ChunkData[offset:])
+				speed, err := DecodeDataTrackerXYZChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.DataTrackerChunk{}, err
+				}
 				data.Speed = &speed
 				offset += 4
 				if data.Speed.Chunk.Header.DataLen > 0 {
 					offset = offset + int(data.Speed.Chunk.Header.DataLen)
 				}
-			case 2:
+			case 0x0002:
-				ori := DecodeDataTrackerXYZChunk(chunk.ChunkData[offset:])
+				ori, err := DecodeDataTrackerXYZChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.DataTrackerChunk{}, err
+				}
 				data.Ori = &ori
 				offset += 4
 				if data.Ori.Chunk.Header.DataLen > 0 {
 					offset = offset + int(data.Ori.Chunk.Header.DataLen)
 				}
-			case 3:
+			case 0x0003:
-				status := DecodeDataTrackerStatusChunk(chunk.ChunkData[offset:])
+				status, err := DecodeDataTrackerStatusChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.DataTrackerChunk{}, err
+				}
 				data.Status = &status
 				offset += 4
 				if data.Status.Chunk.Header.DataLen > 0 {
 					offset = offset + int(data.Status.Chunk.Header.DataLen)
 				}
-			case 4:
+			case 0x0004:
-				accel := DecodeDataTrackerXYZChunk(chunk.ChunkData[offset:])
+				accel, err := DecodeDataTrackerXYZChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.DataTrackerChunk{}, err
+				}
 				data.Accel = &accel
 				offset += 4
 				if data.Accel.Chunk.Header.DataLen > 0 {
 					offset = offset + int(data.Accel.Chunk.Header.DataLen)
 				}
-			case 5:
+			case 0x0005:
-				trgtpos := DecodeDataTrackerXYZChunk(chunk.ChunkData[offset:])
+				trgtpos, err := DecodeDataTrackerXYZChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.DataTrackerChunk{}, err
+				}
 				data.TrgtPos = &trgtpos
 				offset += 4
 				if data.TrgtPos.Chunk.Header.DataLen > 0 {
 					offset = offset + int(data.TrgtPos.Chunk.Header.DataLen)
 				}
-			case 6:
+			case 0x0006:
-				timestamp := DecodeDataTrackerTimestampChunk(chunk.ChunkData[offset:])
+				timestamp, err := DecodeDataTrackerTimestampChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.DataTrackerChunk{}, err
+				}
 				data.Timestamp = &timestamp
 				offset += 4
 				if data.Timestamp.Chunk.Header.DataLen > 0 {
@@ -86,8 +98,9 @@ func DecodeDataTrackerChunk(bytes []byte) DataTrackerChunk {
 		}
 	}
 
-	return DataTrackerChunk{
+	return chunks.DataTrackerChunk{
-		Chunk: chunk,
+			Chunk: chunk,
-		Data:  data,
+			Data:  data,
-	}
+		},
+		nil
 }

internal/decoders/data_tracker_chunk_test.go

@@ -0,0 +1,128 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodDataTrackerChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.DataTrackerChunk
+	}{
+		{
+			description: "DataTracker",
+			bytes: []byte{
+				1, 0, 100, 128, 0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 2, 0, 12,
+				0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64,
+				0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+			},
+			expected: chunks.DataTrackerChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{
+						0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0,
+						0, 64, 64, 2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0,
+						12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64,
+						64, 6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+					},
+					Header: chunks.ChunkHeader{DataLen: 100, Id: 1, HasSubchunks: true},
+				},
+				Data: chunks.DataTrackerChunkData{
+					Pos: &chunks.DataTrackerXYZChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+							Header:    chunks.ChunkHeader{DataLen: 12, Id: 0, HasSubchunks: false},
+						},
+						Data: chunks.DataTrackerXYZChunkData{
+							X: 1.0,
+							Y: 2.0,
+							Z: 3.0,
+						},
+					},
+					Speed: &chunks.DataTrackerXYZChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+							Header:    chunks.ChunkHeader{DataLen: 12, Id: 1, HasSubchunks: false},
+						},
+						Data: chunks.DataTrackerXYZChunkData{
+							X: 1.0,
+							Y: 2.0,
+							Z: 3.0,
+						},
+					},
+					Ori: &chunks.DataTrackerXYZChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+							Header:    chunks.ChunkHeader{DataLen: 12, Id: 2, HasSubchunks: false},
+						},
+						Data: chunks.DataTrackerXYZChunkData{
+							X: 1.0,
+							Y: 2.0,
+							Z: 3.0,
+						},
+					},
+					Status: &chunks.DataTrackerStatusChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{0, 0, 128, 63},
+							Header:    chunks.ChunkHeader{DataLen: 4, Id: 3, HasSubchunks: false},
+						},
+						Data: chunks.DataTrackerStatusChunkData{
+							Validity: 1.0,
+						},
+					},
+					Accel: &chunks.DataTrackerXYZChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+							Header:    chunks.ChunkHeader{DataLen: 12, Id: 4, HasSubchunks: false},
+						},
+						Data: chunks.DataTrackerXYZChunkData{
+							X: 1.0,
+							Y: 2.0,
+							Z: 3.0,
+						},
+					},
+					TrgtPos: &chunks.DataTrackerXYZChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+							Header:    chunks.ChunkHeader{DataLen: 12, Id: 5, HasSubchunks: false},
+						},
+						Data: chunks.DataTrackerXYZChunkData{
+							X: 1.0,
+							Y: 2.0,
+							Z: 3.0,
+						},
+					},
+					Timestamp: &chunks.DataTrackerTimestampChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{210, 2, 150, 73, 0, 0, 0, 0},
+							Header:    chunks.ChunkHeader{DataLen: 8, Id: 6, HasSubchunks: false},
+						},
+						Data: chunks.DataTrackerTimestampChunkData{
+							Timestamp: 1234567890,
+						},
+					},
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeDataTrackerChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %+v\n", testCase.expected)
+			fmt.Printf("actual: %+v\n", actual)
+		}
+	}
+}

internal/decoders/data_tracker_list_chunk.go

@@ -1,21 +1,22 @@
 package decoders
 
-type DataTrackerListChunkData struct {
+import "github.com/jwetzell/psn-go/internal/chunks"
-	Trackers []DataTrackerChunk
-}
-type DataTrackerListChunk struct {
-	Chunk Chunk
-	Data  DataTrackerListChunkData
-}
 
-func DecodeDataTrackerListChunk(bytes []byte) DataTrackerListChunk {
+func DecodeDataTrackerListChunk(bytes []byte) (chunks.DataTrackerListChunk, error) {
-	chunk := DecodeChunk(bytes)
+	chunk, err := DecodeChunk(bytes)
 
-	trackers := []DataTrackerChunk{}
+	if err != nil {
+		return chunks.DataTrackerListChunk{}, err
+	}
+
+	trackers := []chunks.DataTrackerChunk{}
 	if chunk.Header.HasSubchunks && chunk.Header.DataLen > 0 {
 		offset := 0
 		for offset < int(chunk.Header.DataLen) {
-			trackerChunk := DecodeDataTrackerChunk(chunk.ChunkData[offset:])
+			trackerChunk, err := DecodeDataTrackerChunk(chunk.ChunkData[offset:])
+			if err != nil {
+				return chunks.DataTrackerListChunk{}, err
+			}
 			offset += 4
 			if trackerChunk.Chunk.Header.DataLen > 0 {
 				offset += int(trackerChunk.Chunk.Header.DataLen)
@@ -24,13 +25,13 @@ func DecodeDataTrackerListChunk(bytes []byte) DataTrackerListChunk {
 		}
 	}
 
-	data := DataTrackerListChunkData{
+	data := chunks.DataTrackerListChunkData{
 		Trackers: trackers,
 	}
 
-	return DataTrackerListChunk{
+	return chunks.DataTrackerListChunk{
-		Chunk: chunk,
+			Chunk: chunk,
-		Data:  data,
+			Data:  data,
-	}
+		},
-
+		nil
 }

internal/decoders/data_tracker_list_chunk_test.go

@@ -0,0 +1,143 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodDataTrackerListChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.DataTrackerListChunk
+	}{
+		{
+			description: "DataTrackerListChunk",
+			bytes: []byte{
+				1, 0, 104, 128, 1, 0, 100, 128, 0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0,
+				64, 0, 0, 64, 64, 2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0, 12, 0, 0, 0, 128,
+				63, 0, 0, 0, 64, 0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+			},
+			expected: chunks.DataTrackerListChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{
+						1, 0, 100, 128, 0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0,
+						0, 64, 0, 0, 64, 64, 2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4,
+						0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64,
+						6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+					},
+					Header: chunks.ChunkHeader{DataLen: 104, Id: 1, HasSubchunks: true},
+				},
+				Data: chunks.DataTrackerListChunkData{
+					Trackers: []chunks.DataTrackerChunk{
+						{
+							Chunk: chunks.Chunk{
+								ChunkData: []byte{
+									0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0,
+									0, 64, 64, 2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0,
+									12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64,
+									64, 6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+								},
+								Header: chunks.ChunkHeader{DataLen: 100, Id: 1, HasSubchunks: true},
+							},
+							Data: chunks.DataTrackerChunkData{
+								Pos: &chunks.DataTrackerXYZChunk{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+										Header:    chunks.ChunkHeader{DataLen: 12, Id: 0, HasSubchunks: false},
+									},
+									Data: chunks.DataTrackerXYZChunkData{
+										X: 1.0,
+										Y: 2.0,
+										Z: 3.0,
+									},
+								},
+								Speed: &chunks.DataTrackerXYZChunk{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+										Header:    chunks.ChunkHeader{DataLen: 12, Id: 1, HasSubchunks: false},
+									},
+									Data: chunks.DataTrackerXYZChunkData{
+										X: 1.0,
+										Y: 2.0,
+										Z: 3.0,
+									},
+								},
+								Ori: &chunks.DataTrackerXYZChunk{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+										Header:    chunks.ChunkHeader{DataLen: 12, Id: 2, HasSubchunks: false},
+									},
+									Data: chunks.DataTrackerXYZChunkData{
+										X: 1.0,
+										Y: 2.0,
+										Z: 3.0,
+									},
+								},
+								Status: &chunks.DataTrackerStatusChunk{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{0, 0, 128, 63},
+										Header:    chunks.ChunkHeader{DataLen: 4, Id: 3, HasSubchunks: false},
+									},
+									Data: chunks.DataTrackerStatusChunkData{
+										Validity: 1.0,
+									},
+								},
+								Accel: &chunks.DataTrackerXYZChunk{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+										Header:    chunks.ChunkHeader{DataLen: 12, Id: 4, HasSubchunks: false},
+									},
+									Data: chunks.DataTrackerXYZChunkData{
+										X: 1.0,
+										Y: 2.0,
+										Z: 3.0,
+									},
+								},
+								TrgtPos: &chunks.DataTrackerXYZChunk{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+										Header:    chunks.ChunkHeader{DataLen: 12, Id: 5, HasSubchunks: false},
+									},
+									Data: chunks.DataTrackerXYZChunkData{
+										X: 1.0,
+										Y: 2.0,
+										Z: 3.0,
+									},
+								},
+								Timestamp: &chunks.DataTrackerTimestampChunk{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{210, 2, 150, 73, 0, 0, 0, 0},
+										Header:    chunks.ChunkHeader{DataLen: 8, Id: 6, HasSubchunks: false},
+									},
+									Data: chunks.DataTrackerTimestampChunkData{
+										Timestamp: 1234567890,
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeDataTrackerListChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %+v\n", testCase.expected)
+			fmt.Printf("actual: %+v\n", actual)
+		}
+	}
+}

internal/decoders/data_tracker_status_chunk.go

@@ -2,30 +2,32 @@ package decoders
 
 import (
 	"encoding/binary"
+	"errors"
 	"math"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
 )
 
-type DataTrackerStatusChunkData struct {
+func DecodeDataTrackerStatusChunk(bytes []byte) (chunks.DataTrackerStatusChunk, error) {
-	Validity float32
+	chunk, err := DecodeChunk(bytes)
-}
 
-type DataTrackerStatusChunk struct {
+	if err != nil {
-	Chunk Chunk
+		return chunks.DataTrackerStatusChunk{}, err
-	Data  DataTrackerStatusChunkData
+	}
-}
 
-func DecodeDataTrackerStatusChunk(bytes []byte) DataTrackerStatusChunk {
+	if len(chunk.ChunkData) < 4 {
-	chunk := DecodeChunk(bytes)
+		return chunks.DataTrackerStatusChunk{}, errors.New("DATA_TRACKER_STATUS chunk must be at least 4 bytes")
+	}
 
 	statusBits := binary.LittleEndian.Uint32(chunk.ChunkData[0:4])
 
-	data := DataTrackerStatusChunkData{
+	data := chunks.DataTrackerStatusChunkData{
 		Validity: math.Float32frombits(statusBits),
 	}
 
-	return DataTrackerStatusChunk{
+	return chunks.DataTrackerStatusChunk{
-		Chunk: chunk,
+			Chunk: chunk,
-		Data:  data,
+			Data:  data,
-	}
+		},
-
+		nil
 }

internal/decoders/data_tracker_status_chunk_test.go

@@ -0,0 +1,49 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodDataTrackerStatusChunk(t *testing.T) {
+
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.DataTrackerStatusChunk
+	}{
+		{
+			description: "DataTrackerStatusChunk",
+			bytes:       []byte{3, 0, 4, 0, 0, 0, 128, 63},
+			expected: chunks.DataTrackerStatusChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{0, 0, 128, 63},
+					Header:    chunks.ChunkHeader{DataLen: 4, Id: 3, HasSubchunks: false},
+				},
+				Data: chunks.DataTrackerStatusChunkData{
+					Validity: 1.0,
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeDataTrackerStatusChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+
+}

internal/decoders/data_tracker_timestamp_chunk.go

@@ -2,29 +2,31 @@ package decoders
 
 import (
 	"encoding/binary"
+	"errors"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
 )
 
-type DataTrackerTimestampChunkData struct {
+func DecodeDataTrackerTimestampChunk(bytes []byte) (chunks.DataTrackerTimestampChunk, error) {
-	Timestamp uint64
+	chunk, err := DecodeChunk(bytes)
-}
 
-type DataTrackerTimestampChunk struct {
+	if err != nil {
-	Chunk Chunk
+		return chunks.DataTrackerTimestampChunk{}, err
-	Data  DataTrackerTimestampChunkData
+	}
-}
 
-func DecodeDataTrackerTimestampChunk(bytes []byte) DataTrackerTimestampChunk {
+	if len(chunk.ChunkData) < 8 {
-	chunk := DecodeChunk(bytes)
+		return chunks.DataTrackerTimestampChunk{}, errors.New("DATA_TRACKER_TIMESTAMP chunk must be at least 8 bytes")
+	}
 
 	timestamp := binary.LittleEndian.Uint64(chunk.ChunkData[0:8])
 
-	data := DataTrackerTimestampChunkData{
+	data := chunks.DataTrackerTimestampChunkData{
 		Timestamp: timestamp,
 	}
 
-	return DataTrackerTimestampChunk{
+	return chunks.DataTrackerTimestampChunk{
-		Chunk: chunk,
+			Chunk: chunk,
-		Data:  data,
+			Data:  data,
-	}
+		},
-
+		nil
 }

internal/decoders/data_tracker_timestamp_chunk_test.go

@@ -0,0 +1,49 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodDataTrackerTimestampChunk(t *testing.T) {
+
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.DataTrackerTimestampChunk
+	}{
+		{
+			description: "DataTrackerTimestampChunk",
+			bytes:       []byte{6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0},
+			expected: chunks.DataTrackerTimestampChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{210, 2, 150, 73, 0, 0, 0, 0},
+					Header:    chunks.ChunkHeader{DataLen: 8, Id: 6, HasSubchunks: false},
+				},
+				Data: chunks.DataTrackerTimestampChunkData{
+					Timestamp: 1234567890,
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeDataTrackerTimestampChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+
+}

internal/decoders/data_tracker_xyz_chunk.go

@@ -2,36 +2,35 @@ package decoders
 
 import (
 	"encoding/binary"
+	"errors"
 	"math"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
 )
 
-type DataTrackerXYZChunkData struct {
+func DecodeDataTrackerXYZChunk(bytes []byte) (chunks.DataTrackerXYZChunk, error) {
-	X float32
+	chunk, err := DecodeChunk(bytes)
-	Y float32
-	Z float32
-}
 
-type DataTrackerXYZChunk struct {
+	if err != nil {
-	Chunk Chunk
+		return chunks.DataTrackerXYZChunk{}, err
-	Data  DataTrackerXYZChunkData
+	}
-}
 
-func DecodeDataTrackerXYZChunk(bytes []byte) DataTrackerXYZChunk {
+	if len(chunk.ChunkData) < 12 {
-	chunk := DecodeChunk(bytes)
+		return chunks.DataTrackerXYZChunk{}, errors.New("DATA_TRACKER_XYZ chunk must be at least 12 bytes")
+	}
 
 	xBits := binary.LittleEndian.Uint32(chunk.ChunkData[0:4])
 	yBits := binary.LittleEndian.Uint32(chunk.ChunkData[4:8])
 	zBits := binary.LittleEndian.Uint32(chunk.ChunkData[8:12])
 
-	data := DataTrackerXYZChunkData{
+	data := chunks.DataTrackerXYZChunkData{
 		X: math.Float32frombits(xBits),
 		Y: math.Float32frombits(yBits),
 		Z: math.Float32frombits(zBits),
 	}
 
-	return DataTrackerXYZChunk{
+	return chunks.DataTrackerXYZChunk{
 		Chunk: chunk,
 		Data:  data,
-	}
+	}, nil
-
 }

internal/decoders/data_tracker_xyz_chunk_test.go

@@ -0,0 +1,111 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodDataTrackerXYZChunk(t *testing.T) {
+
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.DataTrackerXYZChunk
+	}{
+		{
+			description: "DataTrackerPosChunk",
+			bytes:       []byte{0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+			expected: chunks.DataTrackerXYZChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+					Header:    chunks.ChunkHeader{DataLen: 12, Id: 0, HasSubchunks: false},
+				},
+				Data: chunks.DataTrackerXYZChunkData{
+					X: 1.0,
+					Y: 2.0,
+					Z: 3.0,
+				},
+			},
+		},
+		{
+			description: "DataTrackerSpeedChunk",
+			bytes:       []byte{1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+			expected: chunks.DataTrackerXYZChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+					Header:    chunks.ChunkHeader{DataLen: 12, Id: 1, HasSubchunks: false},
+				},
+				Data: chunks.DataTrackerXYZChunkData{
+					X: 1.0,
+					Y: 2.0,
+					Z: 3.0,
+				},
+			},
+		},
+		{
+			description: "DataTrackerOriChunk",
+			bytes:       []byte{2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+			expected: chunks.DataTrackerXYZChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+					Header:    chunks.ChunkHeader{DataLen: 12, Id: 2, HasSubchunks: false},
+				},
+				Data: chunks.DataTrackerXYZChunkData{
+					X: 1.0,
+					Y: 2.0,
+					Z: 3.0,
+				},
+			},
+		},
+		{
+			description: "DataTrackerAccelChunk",
+			bytes:       []byte{4, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+			expected: chunks.DataTrackerXYZChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+					Header:    chunks.ChunkHeader{DataLen: 12, Id: 4, HasSubchunks: false},
+				},
+				Data: chunks.DataTrackerXYZChunkData{
+					X: 1.0,
+					Y: 2.0,
+					Z: 3.0,
+				},
+			},
+		},
+		{
+			description: "DataTrackerTrgtPosChunk",
+			bytes:       []byte{5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+			expected: chunks.DataTrackerXYZChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64},
+					Header:    chunks.ChunkHeader{DataLen: 12, Id: 5, HasSubchunks: false},
+				},
+				Data: chunks.DataTrackerXYZChunkData{
+					X: 1.0,
+					Y: 2.0,
+					Z: 3.0,
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeDataTrackerXYZChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+
+}

internal/decoders/info_packet_chunk.go

@@ -3,45 +3,47 @@ package decoders
 import (
 	"encoding/binary"
 	"log/slog"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
 )
 
-type InfoPacketChunkData struct {
+func DecodeInfoPacketChunk(bytes []byte) (chunks.InfoPacketChunk, error) {
-	PacketHeader *PacketHeaderChunk
+	chunk, err := DecodeChunk(bytes)
-	SystemName   *InfoSystemNameChunk
+	if err != nil {
-	TrackerList  *InfoTrackerListChunk
+		return chunks.InfoPacketChunk{}, err
-}
+	}
-
+	data := chunks.InfoPacketChunkData{}
-type InfoPacketChunk struct {
-	Chunk Chunk
-	Data  InfoPacketChunkData
-}
-
-func DecodeInfoPacketChunk(bytes []byte) InfoPacketChunk {
-	chunk := DecodeChunk(bytes)
-	data := InfoPacketChunkData{}
 
 	if chunk.Header.HasSubchunks && chunk.ChunkData != nil && chunk.Header.DataLen > 0 {
 		offset := 0
 
 		for offset < int(chunk.Header.DataLen) {
-
 			switch id := binary.LittleEndian.Uint16(chunk.ChunkData[offset : offset+2]); id {
-			case 0:
+			case 0x0000:
-				packet_header := DecodePacketHeaderChunk(chunk.ChunkData[offset:])
+				packet_header, err := DecodePacketHeaderChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.InfoPacketChunk{}, err
+				}
 				data.PacketHeader = &packet_header
 				offset += 4
 				if packet_header.Chunk.Header.DataLen > 0 {
 					offset = offset + int(packet_header.Chunk.Header.DataLen)
 				}
-			case 1:
+			case 0x0001:
-				system_name := DecodeInfoSystemNameChunk(chunk.ChunkData[offset:])
+				system_name, err := DecodeInfoSystemNameChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.InfoPacketChunk{}, err
+				}
 				data.SystemName = &system_name
 				offset += 4
 				if system_name.Chunk.Header.DataLen > 0 {
 					offset = offset + int(system_name.Chunk.Header.DataLen)
 				}
-			case 2:
+			case 0x0002:
-				tracker_list := DecodeInfoTrackerListChunk(chunk.ChunkData[offset:])
+				tracker_list, err := DecodeInfoTrackerListChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.InfoPacketChunk{}, err
+				}
 				data.TrackerList = &tracker_list
 				offset += 4
 				if tracker_list.Chunk.Header.DataLen > 0 {
@@ -54,8 +56,9 @@ func DecodeInfoPacketChunk(bytes []byte) InfoPacketChunk {
 		}
 	}
 
-	return InfoPacketChunk{
+	return chunks.InfoPacketChunk{
-		Chunk: chunk,
+			Chunk: chunk,
-		Data:  data,
+			Data:  data,
-	}
+		},
+		nil
 }

internal/decoders/info_packet_chunk_test.go

@@ -0,0 +1,101 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodInfoPacketChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.InfoPacketChunk
+	}{
+		{
+			description: "InfoPacketChunk",
+			bytes: []byte{
+				86, 103, 51, 128, 0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123, 1, 0, 10, 0, 80, 83, 78, 32, 83, 101,
+				114, 118, 101, 114, 2, 0, 17, 128, 1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49,
+			},
+			expected: chunks.InfoPacketChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{
+						0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123, 1, 0, 10, 0, 80, 83, 78, 32, 83, 101, 114, 118, 101,
+						114, 2, 0, 17, 128, 1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49,
+					},
+					Header: chunks.ChunkHeader{DataLen: 51, Id: 26454, HasSubchunks: true},
+				},
+				Data: chunks.InfoPacketChunkData{
+					PacketHeader: &chunks.PacketHeaderChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123},
+							Header:    chunks.ChunkHeader{DataLen: 12, Id: 0, HasSubchunks: false},
+						},
+						Data: chunks.PacketHeaderChunkData{
+							PacketTimestamp:  1234567890,
+							VersionHigh:      2,
+							VersionLow:       3,
+							FrameId:          1,
+							FramePacketCount: 123,
+						},
+					},
+					SystemName: &chunks.InfoSystemNameChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{80, 83, 78, 32, 83, 101, 114, 118, 101, 114},
+							Header:    chunks.ChunkHeader{DataLen: 10, Id: 1, HasSubchunks: false},
+						},
+						Data: chunks.InfoSystemNameChunkData{
+							SystemName: "PSN Server",
+						},
+					},
+					TrackerList: &chunks.InfoTrackerListChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49},
+							Header:    chunks.ChunkHeader{DataLen: 17, Id: 2, HasSubchunks: true},
+						},
+						Data: chunks.InfoTrackerListChunkData{
+							Trackers: []chunks.InfoTrackerChunk{
+								{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49},
+										Header:    chunks.ChunkHeader{DataLen: 13, Id: 1, HasSubchunks: true},
+									},
+									Data: chunks.InfoTrackerChunkData{
+										TrackerName: &chunks.InfoTrackerNameChunk{
+											Chunk: chunks.Chunk{
+												ChunkData: []byte{84, 114, 97, 99, 107, 101, 114, 32, 49},
+												Header:    chunks.ChunkHeader{DataLen: 9, Id: 0, HasSubchunks: false},
+											},
+											Data: chunks.InfoTrackerNameChunkData{
+												TrackerName: "Tracker 1",
+											},
+										},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeInfoPacketChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %+v\n", testCase.expected)
+			fmt.Printf("actual: %+v\n", actual)
+		}
+	}
+}

internal/decoders/info_system_name_chunk.go

@@ -1,25 +1,20 @@
 package decoders
 
-type InfoSystemNameChunkData struct {
+import "github.com/jwetzell/psn-go/internal/chunks"
-	SystemName string
-}
 
-type InfoSystemNameChunk struct {
+func DecodeInfoSystemNameChunk(bytes []byte) (chunks.InfoSystemNameChunk, error) {
-	Chunk Chunk
+	chunk, err := DecodeChunk(bytes)
-	Data  InfoSystemNameChunkData
+	if err != nil {
-}
+		return chunks.InfoSystemNameChunk{}, err
+	}
+	data := chunks.InfoSystemNameChunkData{}
 
-func DecodeInfoSystemNameChunk(bytes []byte) InfoSystemNameChunk {
+	if chunk.Header.DataLen > 0 {
-	chunk := DecodeChunk(bytes)
+		data.SystemName = string(chunk.ChunkData[0:chunk.Header.DataLen])
-	system_name := string(chunk.ChunkData[0:chunk.Header.DataLen])
-
-	data := InfoSystemNameChunkData{
-		SystemName: system_name,
 	}
 
-	return InfoSystemNameChunk{
+	return chunks.InfoSystemNameChunk{
 		Chunk: chunk,
 		Data:  data,
-	}
+	}, nil
-
 }

internal/decoders/info_system_name_chunk_test.go

@@ -0,0 +1,49 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodInfoSystemNameChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.InfoSystemNameChunk
+	}{
+		{
+			description: "InfoSystemNameChunk",
+			bytes: []byte{
+				1, 0, 10, 0, 80, 83, 78, 32, 83, 101, 114, 118, 101, 114,
+			},
+			expected: chunks.InfoSystemNameChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{80, 83, 78, 32, 83, 101, 114, 118, 101, 114},
+					Header:    chunks.ChunkHeader{DataLen: 10, Id: 1, HasSubchunks: false},
+				},
+				Data: chunks.InfoSystemNameChunkData{
+					SystemName: "PSN Server",
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeInfoSystemNameChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %+v\n", testCase.expected)
+			fmt.Printf("actual: %+v\n", actual)
+		}
+	}
+}

internal/decoders/info_tracker_chunk.go

@@ -3,29 +3,27 @@ package decoders
 import (
 	"encoding/binary"
 	"log/slog"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
 )
 
-type InfoTrackerChunkData struct {
+func DecodeInfoTrackerChunk(bytes []byte) (chunks.InfoTrackerChunk, error) {
-	TrackerName *InfoTrackerNameChunk
+	chunk, err := DecodeChunk(bytes)
-}
+	if err != nil {
-
+		return chunks.InfoTrackerChunk{}, err
-type InfoTrackerChunk struct {
+	}
-	Chunk Chunk
+	data := chunks.InfoTrackerChunkData{}
-	Data  InfoTrackerChunkData
-}
-
-func DecodeInfoTrackerChunk(bytes []byte) InfoTrackerChunk {
-	chunk := DecodeChunk(bytes)
-	data := InfoTrackerChunkData{}
 
 	if chunk.Header.HasSubchunks && chunk.ChunkData != nil && chunk.Header.DataLen > 0 {
 		offset := 0
 
 		for offset < int(chunk.Header.DataLen) {
-
 			switch id := binary.LittleEndian.Uint16(chunk.ChunkData[offset : offset+2]); id {
-			case 0:
+			case 0x0000:
-				tracker_name := DecodeInfoTrackerNameChunk(chunk.ChunkData[offset:])
+				tracker_name, err := DecodeInfoTrackerNameChunk(chunk.ChunkData[offset:])
+				if err != nil {
+					return chunks.InfoTrackerChunk{}, err
+				}
 				data.TrackerName = &tracker_name
 				offset += 4
 				if tracker_name.Chunk.Header.DataLen > 0 {
@@ -37,8 +35,9 @@ func DecodeInfoTrackerChunk(bytes []byte) InfoTrackerChunk {
 		}
 	}
 
-	return InfoTrackerChunk{
+	return chunks.InfoTrackerChunk{
-		Chunk: chunk,
+			Chunk: chunk,
-		Data:  data,
+			Data:  data,
-	}
+		},
+		nil
 }

internal/decoders/info_tracker_chunk_test.go

@@ -0,0 +1,57 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodInfoTrackerChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.InfoTrackerChunk
+	}{
+		{
+			description: "InfoTrackerChunk",
+			bytes: []byte{
+				1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49,
+			},
+			expected: chunks.InfoTrackerChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49},
+					Header:    chunks.ChunkHeader{DataLen: 13, Id: 1, HasSubchunks: true},
+				},
+				Data: chunks.InfoTrackerChunkData{
+					TrackerName: &chunks.InfoTrackerNameChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{84, 114, 97, 99, 107, 101, 114, 32, 49},
+							Header:    chunks.ChunkHeader{DataLen: 9, Id: 0, HasSubchunks: false},
+						},
+						Data: chunks.InfoTrackerNameChunkData{
+							TrackerName: "Tracker 1",
+						},
+					},
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeInfoTrackerChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %+v\n", testCase.expected)
+			fmt.Printf("actual: %+v\n", actual)
+		}
+	}
+}

internal/decoders/info_tracker_list_chunk.go

@@ -1,22 +1,21 @@
 package decoders
 
-type InfoTrackerListChunkData struct {
+import "github.com/jwetzell/psn-go/internal/chunks"
-	Trackers []InfoTrackerChunk
-}
 
-type InfoTrackerListChunk struct {
+func DecodeInfoTrackerListChunk(bytes []byte) (chunks.InfoTrackerListChunk, error) {
-	Chunk Chunk
+	chunk, err := DecodeChunk(bytes)
-	Data  InfoTrackerListChunkData
+	if err != nil {
-}
+		return chunks.InfoTrackerListChunk{}, err
+	}
 
-func DecodeInfoTrackerListChunk(bytes []byte) InfoTrackerListChunk {
+	trackers := []chunks.InfoTrackerChunk{}
-	chunk := DecodeChunk(bytes)
-
-	trackers := []InfoTrackerChunk{}
 	if chunk.Header.HasSubchunks && chunk.Header.DataLen > 0 {
 		offset := 0
 		for offset < int(chunk.Header.DataLen) {
-			trackerChunk := DecodeInfoTrackerChunk(chunk.ChunkData[offset:])
+			trackerChunk, err := DecodeInfoTrackerChunk(chunk.ChunkData[offset:])
+			if err != nil {
+				return chunks.InfoTrackerListChunk{}, err
+			}
 			offset += 4
 			if trackerChunk.Chunk.Header.DataLen > 0 {
 				offset += int(trackerChunk.Chunk.Header.DataLen)
@@ -25,13 +24,13 @@ func DecodeInfoTrackerListChunk(bytes []byte) InfoTrackerListChunk {
 		}
 	}
 
-	data := InfoTrackerListChunkData{
+	data := chunks.InfoTrackerListChunkData{
 		Trackers: trackers,
 	}
 
-	return InfoTrackerListChunk{
+	return chunks.InfoTrackerListChunk{
-		Chunk: chunk,
+			Chunk: chunk,
-		Data:  data,
+			Data:  data,
-	}
+		},
-
+		nil
 }

internal/decoders/info_tracker_list_chunk_test.go

@@ -0,0 +1,67 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodInfoTrackerListChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.InfoTrackerListChunk
+	}{
+		{
+			description: "InfoTrackerListChunk",
+			bytes: []byte{
+				2, 0, 17, 128, 1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49,
+			},
+			expected: chunks.InfoTrackerListChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49},
+					Header:    chunks.ChunkHeader{DataLen: 17, Id: 2, HasSubchunks: true},
+				},
+				Data: chunks.InfoTrackerListChunkData{
+					Trackers: []chunks.InfoTrackerChunk{
+						{
+							Chunk: chunks.Chunk{
+								ChunkData: []byte{0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49},
+								Header:    chunks.ChunkHeader{DataLen: 13, Id: 1, HasSubchunks: true},
+							},
+							Data: chunks.InfoTrackerChunkData{
+								TrackerName: &chunks.InfoTrackerNameChunk{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{84, 114, 97, 99, 107, 101, 114, 32, 49},
+										Header:    chunks.ChunkHeader{DataLen: 9, Id: 0, HasSubchunks: false},
+									},
+									Data: chunks.InfoTrackerNameChunkData{
+										TrackerName: "Tracker 1",
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeInfoTrackerListChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %+v\n", testCase.expected)
+			fmt.Printf("actual: %+v\n", actual)
+		}
+	}
+}

internal/decoders/info_tracker_name_chunk.go

@@ -1,26 +1,23 @@
 package decoders
 
-type InfoTrackerNameChunkData struct {
+import "github.com/jwetzell/psn-go/internal/chunks"
-	TrackerName string
-}
 
-type InfoTrackerNameChunk struct {
+func DecodeInfoTrackerNameChunk(bytes []byte) (chunks.InfoTrackerNameChunk, error) {
-	Chunk Chunk
+	chunk, err := DecodeChunk(bytes)
-	Data  InfoTrackerNameChunkData
-}
 
-func DecodeInfoTrackerNameChunk(bytes []byte) InfoTrackerNameChunk {
+	if err != nil {
-	chunk := DecodeChunk(bytes)
+		return chunks.InfoTrackerNameChunk{}, err
-
-	tracker_name := string(chunk.ChunkData[0:chunk.Header.DataLen])
-
-	data := InfoTrackerNameChunkData{
-		TrackerName: tracker_name,
 	}
 
-	return InfoTrackerNameChunk{
+	data := chunks.InfoTrackerNameChunkData{}
-		Chunk: chunk,
+
-		Data:  data,
+	if chunk.Header.DataLen > 0 {
+		data.TrackerName = string(chunk.ChunkData[0:chunk.Header.DataLen])
 	}
 
+	return chunks.InfoTrackerNameChunk{
+			Chunk: chunk,
+			Data:  data,
+		},
+		nil
 }

internal/decoders/info_tracker_name_chunk_test.go

@@ -0,0 +1,49 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodInfoTrackerNameChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.InfoTrackerNameChunk
+	}{
+		{
+			description: "InfoTrackerNameChunk",
+			bytes: []byte{
+				0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49,
+			},
+			expected: chunks.InfoTrackerNameChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{84, 114, 97, 99, 107, 101, 114, 32, 49},
+					Header:    chunks.ChunkHeader{DataLen: 9, Id: 0, HasSubchunks: false},
+				},
+				Data: chunks.InfoTrackerNameChunkData{
+					TrackerName: "Tracker 1",
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodeInfoTrackerNameChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %+v\n", testCase.expected)
+			fmt.Printf("actual: %+v\n", actual)
+		}
+	}
+}

internal/decoders/packet_header_chunk.go

@@ -1,22 +1,16 @@
 package decoders
 
-import "encoding/binary"
+import (
+	"encoding/binary"
 
-type PacketHeaderChunkData struct {
+	"github.com/jwetzell/psn-go/internal/chunks"
-	PacketTimestamp  uint64
+)
-	VersionHigh      uint8
-	VersionLow       uint8
-	FrameId          uint8
-	FramePacketCount uint8
-}
 
-type PacketHeaderChunk struct {
+func DecodePacketHeaderChunk(bytes []byte) (chunks.PacketHeaderChunk, error) {
-	Chunk Chunk
+	chunk, err := DecodeChunk(bytes)
-	Data  PacketHeaderChunkData
+	if err != nil {
-}
+		return chunks.PacketHeaderChunk{}, err
-
+	}
-func DecodePacketHeaderChunk(bytes []byte) PacketHeaderChunk {
-	chunk := DecodeChunk(bytes)
 
 	packet_timestamp := binary.LittleEndian.Uint64(chunk.ChunkData[0:8])
 	version_high := chunk.ChunkData[8]
@@ -24,7 +18,7 @@ func DecodePacketHeaderChunk(bytes []byte) PacketHeaderChunk {
 	frame_id := chunk.ChunkData[10]
 	frame_packet_count := chunk.ChunkData[11]
 
-	data := PacketHeaderChunkData{
+	data := chunks.PacketHeaderChunkData{
 		PacketTimestamp:  packet_timestamp,
 		VersionHigh:      version_high,
 		VersionLow:       version_low,
@@ -32,9 +26,9 @@ func DecodePacketHeaderChunk(bytes []byte) PacketHeaderChunk {
 		FramePacketCount: frame_packet_count,
 	}
 
-	return PacketHeaderChunk{
+	return chunks.PacketHeaderChunk{
-		Chunk: chunk,
+			Chunk: chunk,
-		Data:  data,
+			Data:  data,
-	}
+		},
-
+		nil
 }

internal/decoders/packet_header_chunk_test.go

@@ -0,0 +1,53 @@
+package decoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestGoodPacketHeaderChunkDecoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		bytes       []byte
+		expected    chunks.PacketHeaderChunk
+	}{
+		{
+			description: "PacketHeaderChunk",
+			bytes: []byte{
+				0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123,
+			},
+			expected: chunks.PacketHeaderChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123},
+					Header:    chunks.ChunkHeader{DataLen: 12, Id: 0, HasSubchunks: false},
+				},
+				Data: chunks.PacketHeaderChunkData{
+					PacketTimestamp:  1234567890,
+					VersionHigh:      2,
+					VersionLow:       3,
+					FrameId:          1,
+					FramePacketCount: 123,
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual, err := DecodePacketHeaderChunk(testCase.bytes)
+
+		if err != nil {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Println(err)
+		}
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to decode chunk properly", testCase.description)
+			fmt.Printf("expected: %+v\n", testCase.expected)
+			fmt.Printf("actual: %+v\n", actual)
+		}
+	}
+}

internal/encoders/chunk.go

@@ -3,7 +3,6 @@ package encoders
 import "encoding/binary"
 
 func EncodeChunk(id uint16, chunkData []byte, hasSubchunks bool) []byte {
-
 	header := []byte{}
 
 	header = binary.LittleEndian.AppendUint16(header, id)

internal/encoders/chunk_test.go

@@ -0,0 +1,69 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		chunk       chunks.Chunk
+	}{
+		{
+			description: "info packet",
+			expected: []byte{
+				0x56, 0x67, 0x34, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
+				0x01, 0x01, 0x00, 0x0b, 0x00, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x4e, 0x61, 0x6d, 0x65, 0x02, 0x00, 0x11,
+				0x80, 0x01, 0x00, 0x0d, 0x80, 0x00, 0x00, 0x09, 0x00, 0x54, 0x72, 0x61, 0x63, 0x6b, 0x65, 0x72, 0x20, 0x31,
+			},
+			chunk: chunks.Chunk{
+				Header: chunks.ChunkHeader{
+					Id:           uint16(26454),
+					DataLen:      uint16(52),
+					HasSubchunks: true,
+				},
+				ChunkData: []byte{
+					0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
+					0x01, 0x01, 0x00, 0x0b, 0x00, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x4e, 0x61, 0x6d, 0x65, 0x02, 0x00, 0x11,
+					0x80, 0x01, 0x00, 0x0d, 0x80, 0x00, 0x00, 0x09, 0x00, 0x54, 0x72, 0x61, 0x63, 0x6b, 0x65, 0x72, 0x20, 0x31,
+				},
+			},
+		},
+		{
+			description: "data packet",
+			expected: []byte{
+				0x55, 0x67, 0x28, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
+				0x01, 0x01, 0x00, 0x14, 0x80, 0x01, 0x00, 0x10, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x00, 0x00,
+				0x80, 0x3f, 0x00, 0x00, 0x80, 0x3f,
+			},
+			chunk: chunks.Chunk{
+				Header: chunks.ChunkHeader{
+					Id:           uint16(26453),
+					DataLen:      uint16(40),
+					HasSubchunks: true,
+				},
+				ChunkData: []byte{
+					0x00, 0x00, 0x0c, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x03, 0x01,
+					0x01, 0x01, 0x00, 0x14, 0x80, 0x01, 0x00, 0x10, 0x80, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x00, 0x00,
+					0x80, 0x3f, 0x00, 0x00, 0x80, 0x3f,
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeChunk(testCase.chunk.Header.Id, testCase.chunk.ChunkData, testCase.chunk.Header.HasSubchunks)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/data_tracker_accel_chunk_test.go

@@ -0,0 +1,40 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestDataTrackerAccelChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		data        chunks.DataTrackerXYZChunkData
+	}{
+		{
+			description: "basic acceleration",
+			expected: []byte{
+				4, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64,
+			},
+			data: chunks.DataTrackerXYZChunkData{
+				X: 1,
+				Y: 2,
+				Z: 3,
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeDataTrackerAccelChunk(testCase.data.X, testCase.data.Y, testCase.data.Z)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/data_tracker_ori_chunk_test.go

@@ -0,0 +1,40 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestDataTrackerOriChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		data        chunks.DataTrackerXYZChunkData
+	}{
+		{
+			description: "basic orientation",
+			expected: []byte{
+				2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64,
+			},
+			data: chunks.DataTrackerXYZChunkData{
+				X: 1,
+				Y: 2,
+				Z: 3,
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeDataTrackerOriChunk(testCase.data.X, testCase.data.Y, testCase.data.Z)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/data_tracker_pos_chunk_test.go

@@ -0,0 +1,40 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestDataTrackerPosChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		data        chunks.DataTrackerXYZChunkData
+	}{
+		{
+			description: "basic position",
+			expected: []byte{
+				0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64,
+			},
+			data: chunks.DataTrackerXYZChunkData{
+				X: 1,
+				Y: 2,
+				Z: 3,
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeDataTrackerPosChunk(testCase.data.X, testCase.data.Y, testCase.data.Z)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/data_tracker_speed_chunk_test.go

@@ -0,0 +1,40 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestDataTrackerSpeedChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		data        chunks.DataTrackerXYZChunkData
+	}{
+		{
+			description: "basic speed",
+			expected: []byte{
+				1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64,
+			},
+			data: chunks.DataTrackerXYZChunkData{
+				X: 1,
+				Y: 2,
+				Z: 3,
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeDataTrackerSpeedChunk(testCase.data.X, testCase.data.Y, testCase.data.Z)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/data_tracker_status_chunk_test.go

@@ -0,0 +1,38 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestDataTrackerStatusChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		data        chunks.DataTrackerStatusChunkData
+	}{
+		{
+			description: "basic status",
+			expected: []byte{
+				3, 0, 4, 0, 0, 0, 128, 63,
+			},
+			data: chunks.DataTrackerStatusChunkData{
+				Validity: 1,
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeDataTrackerStatusChunk(testCase.data.Validity)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/data_tracker_timestamp_chunk_test.go

@@ -0,0 +1,38 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestDataTrackerTimestampChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		data        chunks.DataTrackerTimestampChunkData
+	}{
+		{
+			description: "basic timestamp",
+			expected: []byte{
+				6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+			},
+			data: chunks.DataTrackerTimestampChunkData{
+				Timestamp: 1234567890,
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeDataTrackerTimestampChunk(testCase.data.Timestamp)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/data_tracker_trgtpos_chunk_test.go

@@ -0,0 +1,40 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestDataTrackerTrgtPosChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		data        chunks.DataTrackerXYZChunkData
+	}{
+		{
+			description: "basic target position",
+			expected: []byte{
+				5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64,
+			},
+			data: chunks.DataTrackerXYZChunkData{
+				X: 1,
+				Y: 2,
+				Z: 3,
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeDataTrackerTrgtPosChunk(testCase.data.X, testCase.data.Y, testCase.data.Z)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/info_system_name_chunk_test.go

@@ -0,0 +1,38 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestInfoSystemNameChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		data        chunks.InfoSystemNameChunkData
+	}{
+		{
+			description: "InfoSystemNameChunk",
+			expected: []byte{
+				1, 0, 10, 0, 80, 83, 78, 32, 83, 101, 114, 118, 101, 114,
+			},
+			data: chunks.InfoSystemNameChunkData{
+				SystemName: "PSN Server",
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeInfoSystemNameChunk(testCase.data.SystemName)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/info_tracker_chunk_test.go

@@ -0,0 +1,52 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestInfoTrackerChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		chunk       chunks.InfoTrackerChunk
+	}{
+		{
+			description: "InfoTrackerChunk",
+			expected: []byte{
+				1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49,
+			},
+			chunk: chunks.InfoTrackerChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49},
+					Header:    chunks.ChunkHeader{DataLen: 13, Id: 1, HasSubchunks: true},
+				},
+				Data: chunks.InfoTrackerChunkData{
+					TrackerName: &chunks.InfoTrackerNameChunk{
+						Chunk: chunks.Chunk{
+							ChunkData: []byte{84, 114, 97, 99, 107, 101, 114, 32, 49},
+							Header:    chunks.ChunkHeader{DataLen: 9, Id: 0, HasSubchunks: false},
+						},
+						Data: chunks.InfoTrackerNameChunkData{
+							TrackerName: "Tracker 1",
+						},
+					},
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeInfoTrackerChunk(testCase.chunk.Chunk.Header.Id, EncodeInfoTrackerNameChunk(testCase.chunk.Data.TrackerName.Data.TrackerName))
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/info_tracker_list_chunk_test.go

@@ -0,0 +1,67 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestInfoTrackerListChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		chunk       chunks.InfoTrackerListChunk
+	}{
+		{
+			description: "InfoTrackerListChunk",
+			expected: []byte{
+				2, 0, 17, 128, 1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49,
+			},
+			chunk: chunks.InfoTrackerListChunk{
+				Chunk: chunks.Chunk{
+					ChunkData: []byte{1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49},
+					Header:    chunks.ChunkHeader{DataLen: 17, Id: 2, HasSubchunks: true},
+				},
+				Data: chunks.InfoTrackerListChunkData{
+					Trackers: []chunks.InfoTrackerChunk{
+						{
+							Chunk: chunks.Chunk{
+								ChunkData: []byte{0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49},
+								Header:    chunks.ChunkHeader{DataLen: 13, Id: 1, HasSubchunks: true},
+							},
+							Data: chunks.InfoTrackerChunkData{
+								TrackerName: &chunks.InfoTrackerNameChunk{
+									Chunk: chunks.Chunk{
+										ChunkData: []byte{84, 114, 97, 99, 107, 101, 114, 32, 49},
+										Header:    chunks.ChunkHeader{DataLen: 9, Id: 0, HasSubchunks: false},
+									},
+									Data: chunks.InfoTrackerNameChunkData{
+										TrackerName: "Tracker 1",
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		trackerChunks := [][]byte{}
+		for _, tracker := range testCase.chunk.Data.Trackers {
+			trackerChunks = append(trackerChunks, EncodeInfoTrackerChunk(tracker.Chunk.Header.Id, EncodeInfoTrackerNameChunk(tracker.Data.TrackerName.Data.TrackerName)))
+		}
+
+		actual := EncodeInfoTrackerListChunk(trackerChunks)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/info_tracker_name_chunk_test.go

@@ -0,0 +1,38 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestInfoTrackerNameChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		data        chunks.InfoTrackerNameChunkData
+	}{
+		{
+			description: "InfoTrackerNameChunk",
+			expected: []byte{
+				0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49,
+			},
+			data: chunks.InfoTrackerNameChunkData{
+				TrackerName: "Tracker 1",
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodeInfoTrackerNameChunk(testCase.data.TrackerName)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

internal/encoders/packet_header_chunk_test.go

@@ -0,0 +1,42 @@
+package encoders
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/jwetzell/psn-go/internal/chunks"
+)
+
+func TestPacketHeaderChunkEncoding(t *testing.T) {
+	testCases := []struct {
+		description string
+		expected    []byte
+		data        chunks.PacketHeaderChunkData
+	}{
+		{
+			description: "PacketHeaderChunk",
+			expected: []byte{
+				0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123,
+			},
+			data: chunks.PacketHeaderChunkData{
+				PacketTimestamp:  1234567890,
+				VersionHigh:      2,
+				VersionLow:       3,
+				FrameId:          1,
+				FramePacketCount: 123,
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+
+		actual := EncodePacketHeaderChunk(testCase.data.PacketTimestamp, testCase.data.VersionHigh, testCase.data.VersionLow, testCase.data.FrameId, testCase.data.FramePacketCount)
+
+		if !reflect.DeepEqual(actual, testCase.expected) {
+			t.Errorf("Test '%s' failed to encode chunk properly", testCase.description)
+			fmt.Printf("expected: %v\n", testCase.expected)
+			fmt.Printf("actual: %v\n", actual)
+		}
+	}
+}

tracker.go

@@ -1,7 +1,7 @@
 package psn
 
 import (
-	"github.com/jwetzell/psn-go/internal/decoders"
+	"github.com/jwetzell/psn-go/internal/chunks"
 	"github.com/jwetzell/psn-go/internal/encoders"
 )
 
@@ -12,8 +12,6 @@ type XYZData struct {
 }
 
 type Tracker struct {
-	Id        uint16
-	Name      string
 	Pos       *XYZData
 	Speed     *XYZData
 	Ori       *XYZData
@@ -21,6 +19,8 @@ type Tracker struct {
 	Accel     *XYZData
 	TrgtPos   *XYZData
 	Timestamp *uint64
+	Name      string
+	Id        uint16
 }
 
 func (t *Tracker) SetPos(x float32, y float32, z float32) {
@@ -138,12 +138,12 @@ func (t *Tracker) GetInfoChunk() []byte {
 	return encoders.EncodeInfoTrackerChunk(t.Id, encoders.EncodeInfoTrackerNameChunk(t.Name))
 }
 
-func (t *Tracker) UpdateInfo(infoTrackerChunk decoders.InfoTrackerChunk) {
+func (t *Tracker) UpdateInfo(infoTrackerChunk chunks.InfoTrackerChunk) {
 	t.Id = infoTrackerChunk.Chunk.Header.Id
 	t.Name = infoTrackerChunk.Data.TrackerName.Data.TrackerName
 }
 
-func (t *Tracker) UpdateData(dataTrackerChunk decoders.DataTrackerChunk) {
+func (t *Tracker) UpdateData(dataTrackerChunk chunks.DataTrackerChunk) {
 	if dataTrackerChunk.Data.Pos != nil {
 		t.SetPos(dataTrackerChunk.Data.Pos.Data.X, dataTrackerChunk.Data.Pos.Data.Y, dataTrackerChunk.Data.Pos.Data.Z)
 	}
@@ -173,13 +173,13 @@ func (t *Tracker) UpdateData(dataTrackerChunk decoders.DataTrackerChunk) {
 	}
 }
 
-func TrackerFromInfo(infoTrackerChunk decoders.InfoTrackerChunk) *Tracker {
+func TrackerFromInfo(infoTrackerChunk chunks.InfoTrackerChunk) *Tracker {
 	var tracker Tracker
 	tracker.UpdateInfo(infoTrackerChunk)
 	return &tracker
 }
 
-func TrackerFromData(dataTrackerChunk decoders.DataTrackerChunk) *Tracker {
+func TrackerFromData(dataTrackerChunk chunks.DataTrackerChunk) *Tracker {
 	var tracker Tracker
 	tracker.UpdateData(dataTrackerChunk)
 	return &tracker