diff --git a/chunk7/splitter.go b/chunk7/splitter.go
index 686a46f..6e51edb 100644
--- a/chunk7/splitter.go
+++ b/chunk7/splitter.go
@@ -18,7 +18,7 @@ func UnpackChunks(data []byte) []Chunk {
 		}
 		end := i + chunk.Header.Size
 		chunk.Data = make([]byte, end-i)
-		copy(chunk.Data[:], data[i:end])
+		copy(chunk.Data, data[i:end])
 		i += chunk.Header.Size
 		chunks = append(chunks, chunk)
 	}
diff --git a/go.mod b/go.mod
index 2d98f07..05ac4c2 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/teeworlds-go/go-teeworlds-protocol
 
 go 1.22.3
 
-require github.com/teeworlds-go/huffman v1.0.0 // indirect
+require github.com/teeworlds-go/huffman v1.0.0
diff --git a/internal/testutils/require/require.go b/internal/testutils/require/require.go
new file mode 100644
index 0000000..71b76a1
--- /dev/null
+++ b/internal/testutils/require/require.go
@@ -0,0 +1,53 @@
+package require
+
+import (
+	"reflect"
+	"testing"
+)
+
+func New(t *testing.T) *Require {
+	return &Require{
+		t: t,
+	}
+}
+
+type Require struct {
+	t *testing.T
+}
+
+func (r *Require) Equal(expected any, actual any) {
+	r.t.Helper()
+	Equal(r.t, expected, actual)
+}
+
+func (r *Require) NoError(err error) {
+	r.t.Helper()
+	NoError(r.t, err)
+}
+
+func (r *Require) NotNil(a any) {
+	r.t.Helper()
+	NotNil(r.t, a)
+}
+
+func Equal(t *testing.T, expected any, actual any) {
+	t.Helper()
+	if !reflect.DeepEqual(expected, actual) {
+		t.Fatalf("expected: %v, got: %v", expected, actual)
+	}
+}
+
+func NoError(t *testing.T, err error) {
+	t.Helper()
+	if err != nil {
+		t.Fatalf("expected no error, got: %v", err)
+	}
+}
+
+func NotNil(t *testing.T, a any) {
+	t.Helper()
+	if a != nil {
+		return
+	}
+	t.Fatalf("expected not nil, got: %v", a)
+}
diff --git a/internal/testutils/testutils.go b/internal/testutils/testutils.go
new file mode 100644
index 0000000..95c4dc9
--- /dev/null
+++ b/internal/testutils/testutils.go
@@ -0,0 +1 @@
+package testutils
diff --git a/messages7/auth_challenge.go b/messages7/auth_challenge.go
index 396d073..f10d7f8 100644
--- a/messages7/auth_challenge.go
+++ b/messages7/auth_challenge.go
@@ -11,27 +11,28 @@ type AuthChallenge struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg AuthChallenge) MsgId() int {
+func (msg *AuthChallenge) MsgId() int {
 	return network7.MsgSysAuthChallenge
 }
 
-func (msg AuthChallenge) MsgType() network7.MsgType {
+func (msg *AuthChallenge) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg AuthChallenge) System() bool {
+func (msg *AuthChallenge) System() bool {
 	return true
 }
 
-func (msg AuthChallenge) Vital() bool {
+func (msg *AuthChallenge) Vital() bool {
 	return true
 }
 
-func (msg AuthChallenge) Pack() []byte {
+func (msg *AuthChallenge) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *AuthChallenge) Unpack(u *packer.Unpacker) {
+func (msg *AuthChallenge) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *AuthChallenge) Header() *chunk7.ChunkHeader {
diff --git a/messages7/auth_response.go b/messages7/auth_response.go
index 1ed1ea1..29d03a7 100644
--- a/messages7/auth_response.go
+++ b/messages7/auth_response.go
@@ -11,27 +11,28 @@ type AuthResponse struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg AuthResponse) MsgId() int {
+func (msg *AuthResponse) MsgId() int {
 	return network7.MsgSysAuthResponse
 }
 
-func (msg AuthResponse) MsgType() network7.MsgType {
+func (msg *AuthResponse) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg AuthResponse) System() bool {
+func (msg *AuthResponse) System() bool {
 	return true
 }
 
-func (msg AuthResponse) Vital() bool {
+func (msg *AuthResponse) Vital() bool {
 	return true
 }
 
-func (msg AuthResponse) Pack() []byte {
+func (msg *AuthResponse) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *AuthResponse) Unpack(u *packer.Unpacker) {
+func (msg *AuthResponse) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *AuthResponse) Header() *chunk7.ChunkHeader {
diff --git a/messages7/auth_result.go b/messages7/auth_result.go
index e4d25b1..b8e5ae3 100644
--- a/messages7/auth_result.go
+++ b/messages7/auth_result.go
@@ -11,27 +11,28 @@ type AuthResult struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg AuthResult) MsgId() int {
+func (msg *AuthResult) MsgId() int {
 	return network7.MsgSysAuthResult
 }
 
-func (msg AuthResult) MsgType() network7.MsgType {
+func (msg *AuthResult) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg AuthResult) System() bool {
+func (msg *AuthResult) System() bool {
 	return true
 }
 
-func (msg AuthResult) Vital() bool {
+func (msg *AuthResult) Vital() bool {
 	return true
 }
 
-func (msg AuthResult) Pack() []byte {
+func (msg *AuthResult) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *AuthResult) Unpack(u *packer.Unpacker) {
+func (msg *AuthResult) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *AuthResult) Header() *chunk7.ChunkHeader {
diff --git a/messages7/auth_start.go b/messages7/auth_start.go
index 2cba389..687d237 100644
--- a/messages7/auth_start.go
+++ b/messages7/auth_start.go
@@ -11,27 +11,28 @@ type AuthStart struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg AuthStart) MsgId() int {
+func (msg *AuthStart) MsgId() int {
 	return network7.MsgSysAuthStart
 }
 
-func (msg AuthStart) MsgType() network7.MsgType {
+func (msg *AuthStart) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg AuthStart) System() bool {
+func (msg *AuthStart) System() bool {
 	return true
 }
 
-func (msg AuthStart) Vital() bool {
+func (msg *AuthStart) Vital() bool {
 	return true
 }
 
-func (msg AuthStart) Pack() []byte {
+func (msg *AuthStart) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *AuthStart) Unpack(u *packer.Unpacker) {
+func (msg *AuthStart) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *AuthStart) Header() *chunk7.ChunkHeader {
diff --git a/messages7/cl_start_info.go b/messages7/cl_start_info.go
index a969f6c..6044b4d 100644
--- a/messages7/cl_start_info.go
+++ b/messages7/cl_start_info.go
@@ -34,70 +34,71 @@ type ClStartInfo struct {
 	ColorEyes             int
 }
 
-func (info ClStartInfo) MsgId() int {
+func (msg *ClStartInfo) MsgId() int {
 	return network7.MsgGameClStartInfo
 }
 
-func (info ClStartInfo) MsgType() network7.MsgType {
+func (msg *ClStartInfo) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (info ClStartInfo) System() bool {
+func (msg *ClStartInfo) System() bool {
 	return false
 }
 
-func (info ClStartInfo) Vital() bool {
+func (msg *ClStartInfo) Vital() bool {
 	return true
 }
 
-func (info ClStartInfo) Pack() []byte {
+func (msg *ClStartInfo) Pack() []byte {
 	return slices.Concat(
-		packer.PackStr(info.Name),
-		packer.PackStr(info.Clan),
-		packer.PackInt(info.Country),
-		packer.PackStr(info.Body),
-		packer.PackStr(info.Marking),
-		packer.PackStr(info.Decoration),
-		packer.PackStr(info.Hands),
-		packer.PackStr(info.Feet),
-		packer.PackStr(info.Eyes),
-		packer.PackBool(info.CustomColorBody),
-		packer.PackBool(info.CustomColorMarking),
-		packer.PackBool(info.CustomColorDecoration),
-		packer.PackBool(info.CustomColorHands),
-		packer.PackBool(info.CustomColorFeet),
-		packer.PackBool(info.CustomColorEyes),
-		packer.PackInt(info.ColorBody),
-		packer.PackInt(info.ColorMarking),
-		packer.PackInt(info.ColorDecoration),
-		packer.PackInt(info.ColorHands),
-		packer.PackInt(info.ColorFeet),
-		packer.PackInt(info.ColorEyes),
+		packer.PackStr(msg.Name),
+		packer.PackStr(msg.Clan),
+		packer.PackInt(msg.Country),
+		packer.PackStr(msg.Body),
+		packer.PackStr(msg.Marking),
+		packer.PackStr(msg.Decoration),
+		packer.PackStr(msg.Hands),
+		packer.PackStr(msg.Feet),
+		packer.PackStr(msg.Eyes),
+		packer.PackBool(msg.CustomColorBody),
+		packer.PackBool(msg.CustomColorMarking),
+		packer.PackBool(msg.CustomColorDecoration),
+		packer.PackBool(msg.CustomColorHands),
+		packer.PackBool(msg.CustomColorFeet),
+		packer.PackBool(msg.CustomColorEyes),
+		packer.PackInt(msg.ColorBody),
+		packer.PackInt(msg.ColorMarking),
+		packer.PackInt(msg.ColorDecoration),
+		packer.PackInt(msg.ColorHands),
+		packer.PackInt(msg.ColorFeet),
+		packer.PackInt(msg.ColorEyes),
 	)
 }
 
-func (info *ClStartInfo) Unpack(u *packer.Unpacker) {
-	info.Name = u.GetString()
-	info.Clan = u.GetString()
-	info.Country = u.GetInt()
-	info.Body = u.GetString()
-	info.Marking = u.GetString()
-	info.Decoration = u.GetString()
-	info.Hands = u.GetString()
-	info.Feet = u.GetString()
-	info.Eyes = u.GetString()
-	info.CustomColorBody = u.GetInt() != 0
-	info.CustomColorMarking = u.GetInt() != 0
-	info.CustomColorDecoration = u.GetInt() != 0
-	info.CustomColorHands = u.GetInt() != 0
-	info.CustomColorFeet = u.GetInt() != 0
-	info.CustomColorEyes = u.GetInt() != 0
-	info.ColorBody = u.GetInt()
-	info.ColorMarking = u.GetInt()
-	info.ColorDecoration = u.GetInt()
-	info.ColorHands = u.GetInt()
-	info.ColorFeet = u.GetInt()
-	info.ColorEyes = u.GetInt()
+func (msg *ClStartInfo) Unpack(u *packer.Unpacker) error {
+	msg.Name = u.GetString()
+	msg.Clan = u.GetString()
+	msg.Country = u.GetInt()
+	msg.Body = u.GetString()
+	msg.Marking = u.GetString()
+	msg.Decoration = u.GetString()
+	msg.Hands = u.GetString()
+	msg.Feet = u.GetString()
+	msg.Eyes = u.GetString()
+	msg.CustomColorBody = u.GetInt() != 0
+	msg.CustomColorMarking = u.GetInt() != 0
+	msg.CustomColorDecoration = u.GetInt() != 0
+	msg.CustomColorHands = u.GetInt() != 0
+	msg.CustomColorFeet = u.GetInt() != 0
+	msg.CustomColorEyes = u.GetInt() != 0
+	msg.ColorBody = u.GetInt()
+	msg.ColorMarking = u.GetInt()
+	msg.ColorDecoration = u.GetInt()
+	msg.ColorHands = u.GetInt()
+	msg.ColorFeet = u.GetInt()
+	msg.ColorEyes = u.GetInt()
+	return nil
 }
 
 func (msg *ClStartInfo) Header() *chunk7.ChunkHeader {
diff --git a/messages7/cl_start_info_test.go b/messages7/cl_start_info_test.go
index 9e348d7..231c985 100644
--- a/messages7/cl_start_info_test.go
+++ b/messages7/cl_start_info_test.go
@@ -1,9 +1,9 @@
 package messages7
 
 import (
-	"reflect"
 	"testing"
 
+	"github.com/teeworlds-go/go-teeworlds-protocol/internal/testutils/require"
 	"github.com/teeworlds-go/go-teeworlds-protocol/packer"
 )
 
@@ -44,10 +44,7 @@ func TestPackStartInfo(t *testing.T) {
 	}
 
 	got := info.Pack()
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	require.Equal(t, got, want)
 }
 
 func TestUnpackStartInfo(t *testing.T) {
@@ -64,34 +61,29 @@ func TestUnpackStartInfo(t *testing.T) {
 	})
 
 	info := ClStartInfo{}
-	info.Unpack(&u)
+	err := info.Unpack(&u)
+	require.NoError(t, err)
 
 	{
-		got := info.Eyes
 		want := "standard"
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got := info.Eyes
+		require.Equal(t, got, want)
 
-		got = info.Decoration
 		want = ""
+		got = info.Decoration
 		if got != want {
 			t.Errorf("got %v, wanted %v", got, want)
 		}
 
-		got = info.Marking
 		want = "duodonny"
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got = info.Marking
+		require.Equal(t, got, want)
 	}
 
 	{
-		got := info.ColorDecoration
 		want := 65408
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got := info.ColorDecoration
+		require.Equal(t, got, want)
 	}
 
 	wantedInfo := ClStartInfo{
@@ -118,7 +110,5 @@ func TestUnpackStartInfo(t *testing.T) {
 		ColorEyes:             65408,
 	}
 
-	if !reflect.DeepEqual(info, wantedInfo) {
-		t.Errorf("got %v, wanted %v", info, wantedInfo)
-	}
+	require.Equal(t, wantedInfo, info)
 }
diff --git a/messages7/con_ready.go b/messages7/con_ready.go
index 25fc521..86e636c 100644
--- a/messages7/con_ready.go
+++ b/messages7/con_ready.go
@@ -10,27 +10,28 @@ type ConReady struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg ConReady) MsgId() int {
+func (msg *ConReady) MsgId() int {
 	return network7.MsgSysConReady
 }
 
-func (msg ConReady) MsgType() network7.MsgType {
+func (msg *ConReady) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg ConReady) System() bool {
+func (msg *ConReady) System() bool {
 	return true
 }
 
-func (msg ConReady) Vital() bool {
+func (msg *ConReady) Vital() bool {
 	return true
 }
 
-func (msg ConReady) Pack() []byte {
+func (msg *ConReady) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *ConReady) Unpack(u *packer.Unpacker) {
+func (msg *ConReady) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *ConReady) Header() *chunk7.ChunkHeader {
diff --git a/messages7/ctrl_accept.go b/messages7/ctrl_accept.go
index 8c081e9..9d85c29 100644
--- a/messages7/ctrl_accept.go
+++ b/messages7/ctrl_accept.go
@@ -12,23 +12,23 @@ type CtrlAccept struct {
 	Token [4]byte
 }
 
-func (msg CtrlAccept) MsgId() int {
+func (msg *CtrlAccept) MsgId() int {
 	return network7.MsgCtrlAccept
 }
 
-func (msg CtrlAccept) MsgType() network7.MsgType {
+func (msg *CtrlAccept) MsgType() network7.MsgType {
 	return network7.TypeControl
 }
 
-func (msg CtrlAccept) System() bool {
+func (msg *CtrlAccept) System() bool {
 	return false
 }
 
-func (msg CtrlAccept) Vital() bool {
+func (msg *CtrlAccept) Vital() bool {
 	return false
 }
 
-func (msg CtrlAccept) Pack() []byte {
+func (msg *CtrlAccept) Pack() []byte {
 	return slices.Concat(
 		[]byte{network7.MsgCtrlAccept},
 		msg.Token[:],
@@ -36,7 +36,8 @@ func (msg CtrlAccept) Pack() []byte {
 	)
 }
 
-func (msg *CtrlAccept) Unpack(u *packer.Unpacker) {
+func (msg *CtrlAccept) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *CtrlAccept) Header() *chunk7.ChunkHeader {
diff --git a/messages7/ctrl_close.go b/messages7/ctrl_close.go
index 3c0aed1..9f7fe52 100644
--- a/messages7/ctrl_close.go
+++ b/messages7/ctrl_close.go
@@ -12,32 +12,33 @@ type CtrlClose struct {
 	Reason string
 }
 
-func (msg CtrlClose) MsgId() int {
+func (msg *CtrlClose) MsgId() int {
 	return network7.MsgCtrlClose
 }
 
-func (msg CtrlClose) MsgType() network7.MsgType {
+func (msg *CtrlClose) MsgType() network7.MsgType {
 	return network7.TypeControl
 }
 
-func (msg CtrlClose) System() bool {
+func (msg *CtrlClose) System() bool {
 	return false
 }
 
-func (msg CtrlClose) Vital() bool {
+func (msg *CtrlClose) Vital() bool {
 	return false
 }
 
-func (msg CtrlClose) Pack() []byte {
+func (msg *CtrlClose) Pack() []byte {
 	return slices.Concat(
 		[]byte{network7.MsgCtrlClose},
 		packer.PackStr(msg.Reason),
 	)
 }
 
-func (msg *CtrlClose) Unpack(u *packer.Unpacker) {
+func (msg *CtrlClose) Unpack(u *packer.Unpacker) error {
 	// TODO: sanitize
 	msg.Reason = u.GetString()
+	return nil
 }
 
 func (msg *CtrlClose) Header() *chunk7.ChunkHeader {
diff --git a/messages7/ctrl_connect.go b/messages7/ctrl_connect.go
index b02a0e2..6e2e86a 100644
--- a/messages7/ctrl_connect.go
+++ b/messages7/ctrl_connect.go
@@ -12,23 +12,23 @@ type CtrlConnect struct {
 	Token [4]byte
 }
 
-func (msg CtrlConnect) MsgId() int {
+func (msg *CtrlConnect) MsgId() int {
 	return network7.MsgCtrlConnect
 }
 
-func (msg CtrlConnect) MsgType() network7.MsgType {
+func (msg *CtrlConnect) MsgType() network7.MsgType {
 	return network7.TypeControl
 }
 
-func (msg CtrlConnect) System() bool {
+func (msg *CtrlConnect) System() bool {
 	return false
 }
 
-func (msg CtrlConnect) Vital() bool {
+func (msg *CtrlConnect) Vital() bool {
 	return false
 }
 
-func (msg CtrlConnect) Pack() []byte {
+func (msg *CtrlConnect) Pack() []byte {
 	return slices.Concat(
 		[]byte{network7.MsgCtrlConnect},
 		msg.Token[:],
@@ -36,8 +36,9 @@ func (msg CtrlConnect) Pack() []byte {
 	)
 }
 
-func (msg *CtrlConnect) Unpack(u *packer.Unpacker) {
+func (msg *CtrlConnect) Unpack(u *packer.Unpacker) error {
 	msg.Token = [4]byte(u.Rest())
+	return nil
 }
 
 func (msg *CtrlConnect) Header() *chunk7.ChunkHeader {
diff --git a/messages7/ctrl_keep_alive.go b/messages7/ctrl_keep_alive.go
index 3f2d292..c2c1041 100644
--- a/messages7/ctrl_keep_alive.go
+++ b/messages7/ctrl_keep_alive.go
@@ -9,27 +9,28 @@ import (
 type CtrlKeepAlive struct {
 }
 
-func (msg CtrlKeepAlive) MsgId() int {
+func (msg *CtrlKeepAlive) MsgId() int {
 	return network7.MsgCtrlKeepAlive
 }
 
-func (msg CtrlKeepAlive) MsgType() network7.MsgType {
+func (msg *CtrlKeepAlive) MsgType() network7.MsgType {
 	return network7.TypeControl
 }
 
-func (msg CtrlKeepAlive) System() bool {
+func (msg *CtrlKeepAlive) System() bool {
 	return false
 }
 
-func (msg CtrlKeepAlive) Vital() bool {
+func (msg *CtrlKeepAlive) Vital() bool {
 	return false
 }
 
-func (msg CtrlKeepAlive) Pack() []byte {
+func (msg *CtrlKeepAlive) Pack() []byte {
 	return []byte{network7.MsgCtrlKeepAlive}
 }
 
-func (msg *CtrlKeepAlive) Unpack(u *packer.Unpacker) {
+func (msg *CtrlKeepAlive) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *CtrlKeepAlive) Header() *chunk7.ChunkHeader {
diff --git a/messages7/ctrl_token.go b/messages7/ctrl_token.go
index 7321918..5c4222e 100644
--- a/messages7/ctrl_token.go
+++ b/messages7/ctrl_token.go
@@ -15,23 +15,23 @@ type CtrlToken struct {
 	Token [4]byte
 }
 
-func (msg CtrlToken) MsgId() int {
+func (msg *CtrlToken) MsgId() int {
 	return network7.MsgCtrlToken
 }
 
-func (msg CtrlToken) MsgType() network7.MsgType {
+func (msg *CtrlToken) MsgType() network7.MsgType {
 	return network7.TypeControl
 }
 
-func (msg CtrlToken) System() bool {
+func (msg *CtrlToken) System() bool {
 	return false
 }
 
-func (msg CtrlToken) Vital() bool {
+func (msg *CtrlToken) Vital() bool {
 	return false
 }
 
-func (msg CtrlToken) Pack() []byte {
+func (msg *CtrlToken) Pack() []byte {
 	return slices.Concat(
 		[]byte{network7.MsgCtrlToken},
 		msg.Token[:],
@@ -39,8 +39,9 @@ func (msg CtrlToken) Pack() []byte {
 	)
 }
 
-func (msg *CtrlToken) Unpack(u *packer.Unpacker) {
+func (msg *CtrlToken) Unpack(u *packer.Unpacker) error {
 	msg.Token = [4]byte(u.Rest())
+	return nil
 }
 
 func (msg *CtrlToken) Header() *chunk7.ChunkHeader {
diff --git a/messages7/enter_game.go b/messages7/enter_game.go
index 145c5e2..68ad5bb 100644
--- a/messages7/enter_game.go
+++ b/messages7/enter_game.go
@@ -10,27 +10,28 @@ type EnterGame struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg EnterGame) MsgId() int {
+func (msg *EnterGame) MsgId() int {
 	return network7.MsgSysEnterGame
 }
 
-func (msg EnterGame) MsgType() network7.MsgType {
+func (msg *EnterGame) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg EnterGame) System() bool {
+func (msg *EnterGame) System() bool {
 	return true
 }
 
-func (msg EnterGame) Vital() bool {
+func (msg *EnterGame) Vital() bool {
 	return true
 }
 
-func (msg EnterGame) Pack() []byte {
+func (msg *EnterGame) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *EnterGame) Unpack(u *packer.Unpacker) {
+func (msg *EnterGame) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *EnterGame) Header() *chunk7.ChunkHeader {
diff --git a/messages7/error.go b/messages7/error.go
index 2d056d4..05df4f5 100644
--- a/messages7/error.go
+++ b/messages7/error.go
@@ -11,27 +11,28 @@ type Error struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg Error) MsgId() int {
+func (msg *Error) MsgId() int {
 	return network7.MsgSysError
 }
 
-func (msg Error) MsgType() network7.MsgType {
+func (msg *Error) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg Error) System() bool {
+func (msg *Error) System() bool {
 	return true
 }
 
-func (msg Error) Vital() bool {
+func (msg *Error) Vital() bool {
 	return true
 }
 
-func (msg Error) Pack() []byte {
+func (msg *Error) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *Error) Unpack(u *packer.Unpacker) {
+func (msg *Error) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *Error) Header() *chunk7.ChunkHeader {
diff --git a/messages7/info.go b/messages7/info.go
index be5ea85..5abe827 100644
--- a/messages7/info.go
+++ b/messages7/info.go
@@ -34,7 +34,7 @@ type Info struct {
 	ClientVersion int
 }
 
-func (msg Info) MsgId() int {
+func (msg *Info) MsgId() int {
 	return network7.MsgSysInfo
 }
 
@@ -42,15 +42,15 @@ func (info Info) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg Info) System() bool {
+func (msg *Info) System() bool {
 	return true
 }
 
-func (msg Info) Vital() bool {
+func (msg *Info) Vital() bool {
 	return true
 }
 
-func (msg Info) Pack() []byte {
+func (msg *Info) Pack() []byte {
 	return slices.Concat(
 		packer.PackStr(msg.Version),
 		packer.PackStr(msg.Password),
@@ -58,10 +58,11 @@ func (msg Info) Pack() []byte {
 	)
 }
 
-func (msg *Info) Unpack(u *packer.Unpacker) {
+func (msg *Info) Unpack(u *packer.Unpacker) error {
 	msg.Version = u.GetString()
 	msg.Password = u.GetString()
 	msg.ClientVersion = u.GetInt()
+	return nil
 }
 
 func (msg *Info) Header() *chunk7.ChunkHeader {
diff --git a/messages7/input.go b/messages7/input.go
index 1749f3a..551eccb 100644
--- a/messages7/input.go
+++ b/messages7/input.go
@@ -27,23 +27,23 @@ type Input struct {
 	PrevWeapon   network7.Weapon
 }
 
-func (msg Input) MsgId() int {
+func (msg *Input) MsgId() int {
 	return network7.MsgSysInput
 }
 
-func (msg Input) MsgType() network7.MsgType {
+func (msg *Input) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg Input) System() bool {
+func (msg *Input) System() bool {
 	return true
 }
 
-func (msg Input) Vital() bool {
+func (msg *Input) Vital() bool {
 	return false
 }
 
-func (msg Input) Pack() []byte {
+func (msg *Input) Pack() []byte {
 	return slices.Concat(
 		packer.PackInt(msg.Direction),
 		packer.PackInt(msg.TargetX),
@@ -58,7 +58,7 @@ func (msg Input) Pack() []byte {
 	)
 }
 
-func (msg *Input) Unpack(u *packer.Unpacker) {
+func (msg *Input) Unpack(u *packer.Unpacker) error {
 	msg.Direction = u.GetInt()
 	msg.TargetX = u.GetInt()
 	msg.TargetY = u.GetInt()
@@ -69,6 +69,7 @@ func (msg *Input) Unpack(u *packer.Unpacker) {
 	msg.WantedWeapon = network7.Weapon(u.GetInt())
 	msg.NextWeapon = network7.Weapon(u.GetInt())
 	msg.PrevWeapon = network7.Weapon(u.GetInt())
+	return nil
 }
 
 func (msg *Input) Header() *chunk7.ChunkHeader {
diff --git a/messages7/input_timing.go b/messages7/input_timing.go
index 7a5c25b..f7a3884 100644
--- a/messages7/input_timing.go
+++ b/messages7/input_timing.go
@@ -15,32 +15,33 @@ type InputTiming struct {
 	TimeLeft         int
 }
 
-func (msg InputTiming) MsgId() int {
+func (msg *InputTiming) MsgId() int {
 	return network7.MsgSysInputTiming
 }
 
-func (msg InputTiming) MsgType() network7.MsgType {
+func (msg *InputTiming) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg InputTiming) System() bool {
+func (msg *InputTiming) System() bool {
 	return true
 }
 
-func (msg InputTiming) Vital() bool {
+func (msg *InputTiming) Vital() bool {
 	return false
 }
 
-func (msg InputTiming) Pack() []byte {
+func (msg *InputTiming) Pack() []byte {
 	return slices.Concat(
 		packer.PackInt(msg.IntendedPredTick),
 		packer.PackInt(msg.TimeLeft),
 	)
 }
 
-func (msg *InputTiming) Unpack(u *packer.Unpacker) {
+func (msg *InputTiming) Unpack(u *packer.Unpacker) error {
 	msg.IntendedPredTick = u.GetInt()
 	msg.TimeLeft = u.GetInt()
+	return nil
 }
 
 func (msg *InputTiming) Header() *chunk7.ChunkHeader {
diff --git a/messages7/map_change.go b/messages7/map_change.go
index a042501..21caecb 100644
--- a/messages7/map_change.go
+++ b/messages7/map_change.go
@@ -19,23 +19,23 @@ type MapChange struct {
 	Sha256                      [32]byte
 }
 
-func (msg MapChange) MsgId() int {
+func (msg *MapChange) MsgId() int {
 	return network7.MsgSysMapChange
 }
 
-func (msg MapChange) MsgType() network7.MsgType {
+func (msg *MapChange) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg MapChange) System() bool {
+func (msg *MapChange) System() bool {
 	return true
 }
 
-func (msg MapChange) Vital() bool {
+func (msg *MapChange) Vital() bool {
 	return true
 }
 
-func (msg MapChange) Pack() []byte {
+func (msg *MapChange) Pack() []byte {
 	return slices.Concat(
 		packer.PackStr(msg.Name),
 		packer.PackInt(msg.Crc),
@@ -46,13 +46,14 @@ func (msg MapChange) Pack() []byte {
 	)
 }
 
-func (msg *MapChange) Unpack(u *packer.Unpacker) {
+func (msg *MapChange) Unpack(u *packer.Unpacker) error {
 	msg.Name = u.GetString()
 	msg.Crc = u.GetInt()
 	msg.Size = u.GetInt()
 	msg.NumResponseChunksPerRequest = u.GetInt()
 	msg.ChunkSize = u.GetInt()
 	msg.Sha256 = [32]byte(u.Rest())
+	return nil
 }
 
 func (msg *MapChange) Header() *chunk7.ChunkHeader {
diff --git a/messages7/map_data.go b/messages7/map_data.go
index baa3f6a..0da3d34 100644
--- a/messages7/map_data.go
+++ b/messages7/map_data.go
@@ -12,28 +12,29 @@ type MapData struct {
 	Data []byte
 }
 
-func (msg MapData) MsgId() int {
+func (msg *MapData) MsgId() int {
 	return network7.MsgSysMapData
 }
 
-func (msg MapData) MsgType() network7.MsgType {
+func (msg *MapData) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg MapData) System() bool {
+func (msg *MapData) System() bool {
 	return true
 }
 
-func (msg MapData) Vital() bool {
+func (msg *MapData) Vital() bool {
 	return true
 }
 
-func (msg MapData) Pack() []byte {
+func (msg *MapData) Pack() []byte {
 	return msg.Data
 }
 
-func (msg *MapData) Unpack(u *packer.Unpacker) {
+func (msg *MapData) Unpack(u *packer.Unpacker) error {
 	msg.Data = u.Rest()
+	return nil
 }
 
 func (msg *MapData) Header() *chunk7.ChunkHeader {
diff --git a/messages7/maplist_entry_add.go b/messages7/maplist_entry_add.go
index 311b385..03a57e8 100644
--- a/messages7/maplist_entry_add.go
+++ b/messages7/maplist_entry_add.go
@@ -14,30 +14,31 @@ type MaplistEntryAdd struct {
 	MapName string
 }
 
-func (msg MaplistEntryAdd) MsgId() int {
+func (msg *MaplistEntryAdd) MsgId() int {
 	return network7.MsgSysMaplistEntryAdd
 }
 
-func (msg MaplistEntryAdd) MsgType() network7.MsgType {
+func (msg *MaplistEntryAdd) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg MaplistEntryAdd) System() bool {
+func (msg *MaplistEntryAdd) System() bool {
 	return true
 }
 
-func (msg MaplistEntryAdd) Vital() bool {
+func (msg *MaplistEntryAdd) Vital() bool {
 	return true
 }
 
-func (msg MaplistEntryAdd) Pack() []byte {
+func (msg *MaplistEntryAdd) Pack() []byte {
 	return slices.Concat(
 		packer.PackStr(msg.MapName),
 	)
 }
 
-func (msg *MaplistEntryAdd) Unpack(u *packer.Unpacker) {
+func (msg *MaplistEntryAdd) Unpack(u *packer.Unpacker) error {
 	msg.MapName = u.GetString()
+	return nil
 }
 
 func (msg *MaplistEntryAdd) Header() *chunk7.ChunkHeader {
diff --git a/messages7/maplist_entry_rem.go b/messages7/maplist_entry_rem.go
index 22df6f1..bd12ff7 100644
--- a/messages7/maplist_entry_rem.go
+++ b/messages7/maplist_entry_rem.go
@@ -14,30 +14,31 @@ type MaplistEntryRem struct {
 	MapName string
 }
 
-func (msg MaplistEntryRem) MsgId() int {
+func (msg *MaplistEntryRem) MsgId() int {
 	return network7.MsgSysMaplistEntryRem
 }
 
-func (msg MaplistEntryRem) MsgType() network7.MsgType {
+func (msg *MaplistEntryRem) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg MaplistEntryRem) System() bool {
+func (msg *MaplistEntryRem) System() bool {
 	return true
 }
 
-func (msg MaplistEntryRem) Vital() bool {
+func (msg *MaplistEntryRem) Vital() bool {
 	return true
 }
 
-func (msg MaplistEntryRem) Pack() []byte {
+func (msg *MaplistEntryRem) Pack() []byte {
 	return slices.Concat(
 		packer.PackStr(msg.MapName),
 	)
 }
 
-func (msg *MaplistEntryRem) Unpack(u *packer.Unpacker) {
+func (msg *MaplistEntryRem) Unpack(u *packer.Unpacker) error {
 	msg.MapName = u.GetString()
+	return nil
 }
 
 func (msg *MaplistEntryRem) Header() *chunk7.ChunkHeader {
diff --git a/messages7/net_message.go b/messages7/net_message.go
index 72dd974..69220e7 100644
--- a/messages7/net_message.go
+++ b/messages7/net_message.go
@@ -12,7 +12,7 @@ type NetMessage interface {
 	System() bool
 	Vital() bool
 	Pack() []byte
-	Unpack(u *packer.Unpacker)
+	Unpack(u *packer.Unpacker) error
 
 	Header() *chunk7.ChunkHeader
 	SetHeader(header *chunk7.ChunkHeader)
diff --git a/messages7/ping.go b/messages7/ping.go
index 3d20aff..c6670d2 100644
--- a/messages7/ping.go
+++ b/messages7/ping.go
@@ -10,27 +10,28 @@ type Ping struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg Ping) MsgId() int {
+func (msg *Ping) MsgId() int {
 	return network7.MsgSysPing
 }
 
-func (msg Ping) MsgType() network7.MsgType {
+func (msg *Ping) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg Ping) System() bool {
+func (msg *Ping) System() bool {
 	return true
 }
 
-func (msg Ping) Vital() bool {
+func (msg *Ping) Vital() bool {
 	return true
 }
 
-func (msg Ping) Pack() []byte {
+func (msg *Ping) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *Ping) Unpack(u *packer.Unpacker) {
+func (msg *Ping) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *Ping) Header() *chunk7.ChunkHeader {
diff --git a/messages7/ping_reply.go b/messages7/ping_reply.go
index e20e7b7..9ecf321 100644
--- a/messages7/ping_reply.go
+++ b/messages7/ping_reply.go
@@ -10,27 +10,28 @@ type PingReply struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg PingReply) MsgId() int {
+func (msg *PingReply) MsgId() int {
 	return network7.MsgSysPingReply
 }
 
-func (msg PingReply) MsgType() network7.MsgType {
+func (msg *PingReply) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg PingReply) System() bool {
+func (msg *PingReply) System() bool {
 	return true
 }
 
-func (msg PingReply) Vital() bool {
+func (msg *PingReply) Vital() bool {
 	return true
 }
 
-func (msg PingReply) Pack() []byte {
+func (msg *PingReply) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *PingReply) Unpack(u *packer.Unpacker) {
+func (msg *PingReply) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *PingReply) Header() *chunk7.ChunkHeader {
diff --git a/messages7/rcon_auth.go b/messages7/rcon_auth.go
index b3981b8..c95cc93 100644
--- a/messages7/rcon_auth.go
+++ b/messages7/rcon_auth.go
@@ -14,30 +14,31 @@ type RconAuth struct {
 	Password string
 }
 
-func (msg RconAuth) MsgId() int {
+func (msg *RconAuth) MsgId() int {
 	return network7.MsgSysRconAuth
 }
 
-func (msg RconAuth) MsgType() network7.MsgType {
+func (msg *RconAuth) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg RconAuth) System() bool {
+func (msg *RconAuth) System() bool {
 	return true
 }
 
-func (msg RconAuth) Vital() bool {
+func (msg *RconAuth) Vital() bool {
 	return true
 }
 
-func (msg RconAuth) Pack() []byte {
+func (msg *RconAuth) Pack() []byte {
 	return slices.Concat(
 		packer.PackStr(msg.Password),
 	)
 }
 
-func (msg *RconAuth) Unpack(u *packer.Unpacker) {
+func (msg *RconAuth) Unpack(u *packer.Unpacker) error {
 	msg.Password = u.GetString()
+	return nil
 }
 
 func (msg *RconAuth) Header() *chunk7.ChunkHeader {
diff --git a/messages7/rcon_auth_off.go b/messages7/rcon_auth_off.go
index f577b49..279608a 100644
--- a/messages7/rcon_auth_off.go
+++ b/messages7/rcon_auth_off.go
@@ -10,27 +10,28 @@ type RconAuthOff struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg RconAuthOff) MsgId() int {
+func (msg *RconAuthOff) MsgId() int {
 	return network7.MsgSysRconAuthOff
 }
 
-func (msg RconAuthOff) MsgType() network7.MsgType {
+func (msg *RconAuthOff) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg RconAuthOff) System() bool {
+func (msg *RconAuthOff) System() bool {
 	return true
 }
 
-func (msg RconAuthOff) Vital() bool {
+func (msg *RconAuthOff) Vital() bool {
 	return true
 }
 
-func (msg RconAuthOff) Pack() []byte {
+func (msg *RconAuthOff) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *RconAuthOff) Unpack(u *packer.Unpacker) {
+func (msg *RconAuthOff) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *RconAuthOff) Header() *chunk7.ChunkHeader {
diff --git a/messages7/rcon_auth_on.go b/messages7/rcon_auth_on.go
index b035d06..d051fc0 100644
--- a/messages7/rcon_auth_on.go
+++ b/messages7/rcon_auth_on.go
@@ -10,27 +10,28 @@ type RconAuthOn struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg RconAuthOn) MsgId() int {
+func (msg *RconAuthOn) MsgId() int {
 	return network7.MsgSysRconAuthOn
 }
 
-func (msg RconAuthOn) MsgType() network7.MsgType {
+func (msg *RconAuthOn) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg RconAuthOn) System() bool {
+func (msg *RconAuthOn) System() bool {
 	return true
 }
 
-func (msg RconAuthOn) Vital() bool {
+func (msg *RconAuthOn) Vital() bool {
 	return true
 }
 
-func (msg RconAuthOn) Pack() []byte {
+func (msg *RconAuthOn) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *RconAuthOn) Unpack(u *packer.Unpacker) {
+func (msg *RconAuthOn) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *RconAuthOn) Header() *chunk7.ChunkHeader {
diff --git a/messages7/rcon_cmd.go b/messages7/rcon_cmd.go
index 0f2be90..c142e90 100644
--- a/messages7/rcon_cmd.go
+++ b/messages7/rcon_cmd.go
@@ -14,30 +14,31 @@ type RconCmd struct {
 	Command string
 }
 
-func (msg RconCmd) MsgId() int {
+func (msg *RconCmd) MsgId() int {
 	return network7.MsgSysRconCmd
 }
 
-func (msg RconCmd) MsgType() network7.MsgType {
+func (msg *RconCmd) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg RconCmd) System() bool {
+func (msg *RconCmd) System() bool {
 	return true
 }
 
-func (msg RconCmd) Vital() bool {
+func (msg *RconCmd) Vital() bool {
 	return true
 }
 
-func (msg RconCmd) Pack() []byte {
+func (msg *RconCmd) Pack() []byte {
 	return slices.Concat(
 		packer.PackStr(msg.Command),
 	)
 }
 
-func (msg *RconCmd) Unpack(u *packer.Unpacker) {
+func (msg *RconCmd) Unpack(u *packer.Unpacker) error {
 	msg.Command = u.GetString()
+	return nil
 }
 
 func (msg *RconCmd) Header() *chunk7.ChunkHeader {
diff --git a/messages7/rcon_cmd_add.go b/messages7/rcon_cmd_add.go
index b864378..1c45012 100644
--- a/messages7/rcon_cmd_add.go
+++ b/messages7/rcon_cmd_add.go
@@ -16,23 +16,23 @@ type RconCmdAdd struct {
 	Params string
 }
 
-func (msg RconCmdAdd) MsgId() int {
+func (msg *RconCmdAdd) MsgId() int {
 	return network7.MsgSysRconCmdAdd
 }
 
-func (msg RconCmdAdd) MsgType() network7.MsgType {
+func (msg *RconCmdAdd) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg RconCmdAdd) System() bool {
+func (msg *RconCmdAdd) System() bool {
 	return true
 }
 
-func (msg RconCmdAdd) Vital() bool {
+func (msg *RconCmdAdd) Vital() bool {
 	return true
 }
 
-func (msg RconCmdAdd) Pack() []byte {
+func (msg *RconCmdAdd) Pack() []byte {
 	return slices.Concat(
 		packer.PackStr(msg.Name),
 		packer.PackStr(msg.Help),
@@ -40,10 +40,11 @@ func (msg RconCmdAdd) Pack() []byte {
 	)
 }
 
-func (msg *RconCmdAdd) Unpack(u *packer.Unpacker) {
+func (msg *RconCmdAdd) Unpack(u *packer.Unpacker) error {
 	msg.Name = u.GetString()
 	msg.Help = u.GetString()
 	msg.Params = u.GetString()
+	return nil
 }
 
 func (msg *RconCmdAdd) Header() *chunk7.ChunkHeader {
diff --git a/messages7/rcon_cmd_rem.go b/messages7/rcon_cmd_rem.go
index c473ceb..99f657c 100644
--- a/messages7/rcon_cmd_rem.go
+++ b/messages7/rcon_cmd_rem.go
@@ -14,30 +14,31 @@ type RconCmdRem struct {
 	Name string
 }
 
-func (msg RconCmdRem) MsgId() int {
+func (msg *RconCmdRem) MsgId() int {
 	return network7.MsgSysRconCmdRem
 }
 
-func (msg RconCmdRem) MsgType() network7.MsgType {
+func (msg *RconCmdRem) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg RconCmdRem) System() bool {
+func (msg *RconCmdRem) System() bool {
 	return true
 }
 
-func (msg RconCmdRem) Vital() bool {
+func (msg *RconCmdRem) Vital() bool {
 	return true
 }
 
-func (msg RconCmdRem) Pack() []byte {
+func (msg *RconCmdRem) Pack() []byte {
 	return slices.Concat(
 		packer.PackStr(msg.Name),
 	)
 }
 
-func (msg *RconCmdRem) Unpack(u *packer.Unpacker) {
+func (msg *RconCmdRem) Unpack(u *packer.Unpacker) error {
 	msg.Name = u.GetString()
+	return nil
 }
 
 func (msg *RconCmdRem) Header() *chunk7.ChunkHeader {
diff --git a/messages7/rcon_line.go b/messages7/rcon_line.go
index 18580bd..60d1954 100644
--- a/messages7/rcon_line.go
+++ b/messages7/rcon_line.go
@@ -14,30 +14,31 @@ type RconLine struct {
 	Line string
 }
 
-func (msg RconLine) MsgId() int {
+func (msg *RconLine) MsgId() int {
 	return network7.MsgSysRconLine
 }
 
-func (msg RconLine) MsgType() network7.MsgType {
+func (msg *RconLine) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg RconLine) System() bool {
+func (msg *RconLine) System() bool {
 	return true
 }
 
-func (msg RconLine) Vital() bool {
+func (msg *RconLine) Vital() bool {
 	return true
 }
 
-func (msg RconLine) Pack() []byte {
+func (msg *RconLine) Pack() []byte {
 	return slices.Concat(
 		packer.PackStr(msg.Line),
 	)
 }
 
-func (msg *RconLine) Unpack(u *packer.Unpacker) {
+func (msg *RconLine) Unpack(u *packer.Unpacker) error {
 	msg.Line = u.GetString()
+	return nil
 }
 
 func (msg *RconLine) Header() *chunk7.ChunkHeader {
diff --git a/messages7/ready.go b/messages7/ready.go
index 4ceae22..1ba65eb 100644
--- a/messages7/ready.go
+++ b/messages7/ready.go
@@ -10,27 +10,28 @@ type Ready struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg Ready) MsgId() int {
+func (msg *Ready) MsgId() int {
 	return network7.MsgSysReady
 }
 
-func (msg Ready) MsgType() network7.MsgType {
+func (msg *Ready) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg Ready) System() bool {
+func (msg *Ready) System() bool {
 	return true
 }
 
-func (msg Ready) Vital() bool {
+func (msg *Ready) Vital() bool {
 	return true
 }
 
-func (msg Ready) Pack() []byte {
+func (msg *Ready) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *Ready) Unpack(u *packer.Unpacker) {
+func (msg *Ready) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *Ready) Header() *chunk7.ChunkHeader {
diff --git a/messages7/ready_to_enter.go b/messages7/ready_to_enter.go
index 05066f9..db48dc7 100644
--- a/messages7/ready_to_enter.go
+++ b/messages7/ready_to_enter.go
@@ -10,27 +10,28 @@ type ReadyToEnter struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg ReadyToEnter) MsgId() int {
+func (msg *ReadyToEnter) MsgId() int {
 	return network7.MsgGameReadyToEnter
 }
 
-func (msg ReadyToEnter) MsgType() network7.MsgType {
+func (msg *ReadyToEnter) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg ReadyToEnter) System() bool {
+func (msg *ReadyToEnter) System() bool {
 	return false
 }
 
-func (msg ReadyToEnter) Vital() bool {
+func (msg *ReadyToEnter) Vital() bool {
 	return true
 }
 
-func (msg ReadyToEnter) Pack() []byte {
+func (msg *ReadyToEnter) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *ReadyToEnter) Unpack(u *packer.Unpacker) {
+func (msg *ReadyToEnter) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *ReadyToEnter) Header() *chunk7.ChunkHeader {
diff --git a/messages7/request_map_data.go b/messages7/request_map_data.go
index 3273315..dcc2d22 100644
--- a/messages7/request_map_data.go
+++ b/messages7/request_map_data.go
@@ -10,27 +10,28 @@ type RequestMapData struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg RequestMapData) MsgId() int {
+func (msg *RequestMapData) MsgId() int {
 	return network7.MsgSysRequestMapData
 }
 
-func (msg RequestMapData) MsgType() network7.MsgType {
+func (msg *RequestMapData) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg RequestMapData) System() bool {
+func (msg *RequestMapData) System() bool {
 	return true
 }
 
-func (msg RequestMapData) Vital() bool {
+func (msg *RequestMapData) Vital() bool {
 	return true
 }
 
-func (msg RequestMapData) Pack() []byte {
+func (msg *RequestMapData) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *RequestMapData) Unpack(u *packer.Unpacker) {
+func (msg *RequestMapData) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *RequestMapData) Header() *chunk7.ChunkHeader {
diff --git a/messages7/server_info.go b/messages7/server_info.go
index 28077b1..58b747c 100644
--- a/messages7/server_info.go
+++ b/messages7/server_info.go
@@ -24,23 +24,23 @@ type ServerInfo struct {
 	MaxClients  int
 }
 
-func (msg ServerInfo) MsgId() int {
+func (msg *ServerInfo) MsgId() int {
 	return network7.MsgSysServerInfo
 }
 
-func (msg ServerInfo) MsgType() network7.MsgType {
+func (msg *ServerInfo) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg ServerInfo) System() bool {
+func (msg *ServerInfo) System() bool {
 	return true
 }
 
-func (msg ServerInfo) Vital() bool {
+func (msg *ServerInfo) Vital() bool {
 	return true
 }
 
-func (msg ServerInfo) Pack() []byte {
+func (msg *ServerInfo) Pack() []byte {
 	return slices.Concat(
 		packer.PackStr(msg.Version),
 		packer.PackStr(msg.Name),
@@ -56,7 +56,7 @@ func (msg ServerInfo) Pack() []byte {
 	)
 }
 
-func (msg *ServerInfo) Unpack(u *packer.Unpacker) {
+func (msg *ServerInfo) Unpack(u *packer.Unpacker) error {
 	msg.Version = u.GetString()
 	msg.Name = u.GetString()
 	msg.Hostname = u.GetString()
@@ -68,6 +68,7 @@ func (msg *ServerInfo) Unpack(u *packer.Unpacker) {
 	msg.PlayerSlots = u.GetInt()
 	msg.ClientCount = u.GetInt()
 	msg.MaxClients = u.GetInt()
+	return nil
 }
 
 func (msg *ServerInfo) Header() *chunk7.ChunkHeader {
diff --git a/messages7/snap.go b/messages7/snap.go
index 2aff0f6..9ed9861 100644
--- a/messages7/snap.go
+++ b/messages7/snap.go
@@ -20,23 +20,23 @@ type Snap struct {
 	Data      []byte
 }
 
-func (msg Snap) MsgId() int {
+func (msg *Snap) MsgId() int {
 	return network7.MsgSysSnap
 }
 
-func (msg Snap) MsgType() network7.MsgType {
+func (msg *Snap) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg Snap) System() bool {
+func (msg *Snap) System() bool {
 	return true
 }
 
-func (msg Snap) Vital() bool {
+func (msg *Snap) Vital() bool {
 	return false
 }
 
-func (msg Snap) Pack() []byte {
+func (msg *Snap) Pack() []byte {
 	return slices.Concat(
 		packer.PackInt(msg.GameTick),
 		packer.PackInt(msg.DeltaTick),
@@ -44,11 +44,11 @@ func (msg Snap) Pack() []byte {
 		packer.PackInt(msg.Part),
 		packer.PackInt(msg.Crc),
 		packer.PackInt(msg.PartSize),
-		msg.Data[:],
+		msg.Data,
 	)
 }
 
-func (msg *Snap) Unpack(u *packer.Unpacker) {
+func (msg *Snap) Unpack(u *packer.Unpacker) error {
 	msg.GameTick = u.GetInt()
 	msg.DeltaTick = u.GetInt()
 	msg.NumParts = u.GetInt()
@@ -56,6 +56,7 @@ func (msg *Snap) Unpack(u *packer.Unpacker) {
 	msg.Crc = u.GetInt()
 	msg.PartSize = u.GetInt()
 	msg.Data = u.Rest()
+	return nil
 }
 
 func (msg *Snap) Header() *chunk7.ChunkHeader {
diff --git a/messages7/snap_empty.go b/messages7/snap_empty.go
index f549dbc..b6ad052 100644
--- a/messages7/snap_empty.go
+++ b/messages7/snap_empty.go
@@ -15,32 +15,33 @@ type SnapEmpty struct {
 	DeltaTick int
 }
 
-func (msg SnapEmpty) MsgId() int {
+func (msg *SnapEmpty) MsgId() int {
 	return network7.MsgSysSnapEmpty
 }
 
-func (msg SnapEmpty) MsgType() network7.MsgType {
+func (msg *SnapEmpty) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg SnapEmpty) System() bool {
+func (msg *SnapEmpty) System() bool {
 	return true
 }
 
-func (msg SnapEmpty) Vital() bool {
+func (msg *SnapEmpty) Vital() bool {
 	return false
 }
 
-func (msg SnapEmpty) Pack() []byte {
+func (msg *SnapEmpty) Pack() []byte {
 	return slices.Concat(
 		packer.PackInt(msg.GameTick),
 		packer.PackInt(msg.DeltaTick),
 	)
 }
 
-func (msg *SnapEmpty) Unpack(u *packer.Unpacker) {
+func (msg *SnapEmpty) Unpack(u *packer.Unpacker) error {
 	msg.GameTick = u.GetInt()
 	msg.DeltaTick = u.GetInt()
+	return nil
 }
 
 func (msg *SnapEmpty) Header() *chunk7.ChunkHeader {
diff --git a/messages7/snap_single.go b/messages7/snap_single.go
index 4facb36..71ba708 100644
--- a/messages7/snap_single.go
+++ b/messages7/snap_single.go
@@ -18,38 +18,39 @@ type SnapSingle struct {
 	Data      []byte
 }
 
-func (msg SnapSingle) MsgId() int {
+func (msg *SnapSingle) MsgId() int {
 	return network7.MsgSysSnapSingle
 }
 
-func (msg SnapSingle) MsgType() network7.MsgType {
+func (msg *SnapSingle) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg SnapSingle) System() bool {
+func (msg *SnapSingle) System() bool {
 	return true
 }
 
-func (msg SnapSingle) Vital() bool {
+func (msg *SnapSingle) Vital() bool {
 	return false
 }
 
-func (msg SnapSingle) Pack() []byte {
+func (msg *SnapSingle) Pack() []byte {
 	return slices.Concat(
 		packer.PackInt(msg.GameTick),
 		packer.PackInt(msg.DeltaTick),
 		packer.PackInt(msg.Crc),
 		packer.PackInt(msg.PartSize),
-		msg.Data[:],
+		msg.Data,
 	)
 }
 
-func (msg *SnapSingle) Unpack(u *packer.Unpacker) {
+func (msg *SnapSingle) Unpack(u *packer.Unpacker) error {
 	msg.GameTick = u.GetInt()
 	msg.DeltaTick = u.GetInt()
 	msg.Crc = u.GetInt()
 	msg.PartSize = u.GetInt()
 	msg.Data = u.Rest()
+	return nil
 }
 
 func (msg *SnapSingle) Header() *chunk7.ChunkHeader {
diff --git a/messages7/snap_small.go b/messages7/snap_small.go
index 67b5b56..70d1db7 100644
--- a/messages7/snap_small.go
+++ b/messages7/snap_small.go
@@ -11,27 +11,28 @@ type SnapSmall struct {
 	ChunkHeader *chunk7.ChunkHeader
 }
 
-func (msg SnapSmall) MsgId() int {
+func (msg *SnapSmall) MsgId() int {
 	return network7.MsgSysSnapSmall
 }
 
-func (msg SnapSmall) MsgType() network7.MsgType {
+func (msg *SnapSmall) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg SnapSmall) System() bool {
+func (msg *SnapSmall) System() bool {
 	return true
 }
 
-func (msg SnapSmall) Vital() bool {
+func (msg *SnapSmall) Vital() bool {
 	return false
 }
 
-func (msg SnapSmall) Pack() []byte {
+func (msg *SnapSmall) Pack() []byte {
 	return []byte{}
 }
 
-func (msg *SnapSmall) Unpack(u *packer.Unpacker) {
+func (msg *SnapSmall) Unpack(u *packer.Unpacker) error {
+	return nil
 }
 
 func (msg *SnapSmall) Header() *chunk7.ChunkHeader {
diff --git a/messages7/sv_broadcast.go b/messages7/sv_broadcast.go
index b8e828d..2912cff 100644
--- a/messages7/sv_broadcast.go
+++ b/messages7/sv_broadcast.go
@@ -12,28 +12,29 @@ type SvBroadcast struct {
 	Message string
 }
 
-func (msg SvBroadcast) MsgId() int {
+func (msg *SvBroadcast) MsgId() int {
 	return network7.MsgGameSvBroadcast
 }
 
-func (msg SvBroadcast) MsgType() network7.MsgType {
+func (msg *SvBroadcast) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg SvBroadcast) System() bool {
+func (msg *SvBroadcast) System() bool {
 	return false
 }
 
-func (msg SvBroadcast) Vital() bool {
+func (msg *SvBroadcast) Vital() bool {
 	return true
 }
 
-func (msg SvBroadcast) Pack() []byte {
+func (msg *SvBroadcast) Pack() []byte {
 	return packer.PackStr(msg.Message)
 }
 
-func (msg *SvBroadcast) Unpack(u *packer.Unpacker) {
+func (msg *SvBroadcast) Unpack(u *packer.Unpacker) error {
 	msg.Message = u.GetString()
+	return nil
 }
 
 func (msg *SvBroadcast) Header() *chunk7.ChunkHeader {
diff --git a/messages7/sv_chat.go b/messages7/sv_chat.go
index 50430dc..4fc4831 100644
--- a/messages7/sv_chat.go
+++ b/messages7/sv_chat.go
@@ -17,23 +17,23 @@ type SvChat struct {
 	Message  string
 }
 
-func (msg SvChat) MsgId() int {
+func (msg *SvChat) MsgId() int {
 	return network7.MsgGameSvChat
 }
 
-func (msg SvChat) MsgType() network7.MsgType {
+func (msg *SvChat) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg SvChat) System() bool {
+func (msg *SvChat) System() bool {
 	return false
 }
 
-func (msg SvChat) Vital() bool {
+func (msg *SvChat) Vital() bool {
 	return true
 }
 
-func (msg SvChat) Pack() []byte {
+func (msg *SvChat) Pack() []byte {
 	return slices.Concat(
 		packer.PackInt(int(msg.Mode)),
 		packer.PackInt(msg.ClientId),
@@ -42,11 +42,13 @@ func (msg SvChat) Pack() []byte {
 	)
 }
 
-func (msg *SvChat) Unpack(u *packer.Unpacker) {
+func (msg *SvChat) Unpack(u *packer.Unpacker) error {
 	msg.Mode = network7.ChatMode(u.GetInt())
 	msg.ClientId = u.GetInt()
 	msg.TargetId = u.GetInt()
 	msg.Message = u.GetString()
+
+	return nil
 }
 
 func (msg *SvChat) Header() *chunk7.ChunkHeader {
diff --git a/messages7/sv_client_info.go b/messages7/sv_client_info.go
index 0014af9..dc609ca 100644
--- a/messages7/sv_client_info.go
+++ b/messages7/sv_client_info.go
@@ -53,7 +53,7 @@ func (info *SvClientInfo) Vital() bool {
 	return true
 }
 
-func (msg SvClientInfo) Pack() []byte {
+func (msg *SvClientInfo) Pack() []byte {
 	return slices.Concat(
 		packer.PackInt(msg.ClientId),
 		packer.PackBool(msg.Local),
@@ -82,7 +82,7 @@ func (msg SvClientInfo) Pack() []byte {
 	)
 }
 
-func (info *SvClientInfo) Unpack(u *packer.Unpacker) {
+func (info *SvClientInfo) Unpack(u *packer.Unpacker) error {
 	info.ClientId = u.GetInt()
 	info.Local = u.GetInt() != 0
 	info.Team = u.GetInt()
@@ -107,6 +107,8 @@ func (info *SvClientInfo) Unpack(u *packer.Unpacker) {
 	info.ColorFeet = u.GetInt()
 	info.ColorEyes = u.GetInt()
 	info.Silent = u.GetInt() != 0
+
+	return nil
 }
 
 func (msg *SvClientInfo) Header() *chunk7.ChunkHeader {
diff --git a/messages7/sv_client_info_test.go b/messages7/sv_client_info_test.go
index 44727d8..dfb6c10 100644
--- a/messages7/sv_client_info_test.go
+++ b/messages7/sv_client_info_test.go
@@ -1,9 +1,9 @@
 package messages7
 
 import (
-	"reflect"
 	"testing"
 
+	"github.com/teeworlds-go/go-teeworlds-protocol/internal/testutils/require"
 	"github.com/teeworlds-go/go-teeworlds-protocol/packer"
 )
 
@@ -21,26 +21,21 @@ func TestUnpackClientInfo(t *testing.T) {
 	})
 
 	info := SvClientInfo{}
-	info.Unpack(&u)
+	err := info.Unpack(&u)
+	require.NoError(t, err)
 
 	{
-		got := info.Eyes
 		want := "standard"
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got := info.Eyes
+		require.Equal(t, want, got)
 
-		got = info.Decoration
 		want = ""
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got = info.Decoration
+		require.Equal(t, want, got)
 
-		got = info.Marking
 		want = "duodonny"
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got = info.Marking
+		require.Equal(t, want, got)
 	}
 
 	wantedInfo := SvClientInfo{
@@ -69,8 +64,5 @@ func TestUnpackClientInfo(t *testing.T) {
 		ColorEyes:             65408,
 		Silent:                true,
 	}
-
-	if !reflect.DeepEqual(info, wantedInfo) {
-		t.Errorf("got %v, wanted %v", info, wantedInfo)
-	}
+	require.Equal(t, wantedInfo, info)
 }
diff --git a/messages7/sv_motd.go b/messages7/sv_motd.go
index 3150324..44fafdb 100644
--- a/messages7/sv_motd.go
+++ b/messages7/sv_motd.go
@@ -12,28 +12,29 @@ type SvMotd struct {
 	Message string
 }
 
-func (msg SvMotd) MsgId() int {
+func (msg *SvMotd) MsgId() int {
 	return network7.MsgGameSvMotd
 }
 
-func (msg SvMotd) MsgType() network7.MsgType {
+func (msg *SvMotd) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg SvMotd) System() bool {
+func (msg *SvMotd) System() bool {
 	return false
 }
 
-func (msg SvMotd) Vital() bool {
+func (msg *SvMotd) Vital() bool {
 	return true
 }
 
-func (msg SvMotd) Pack() []byte {
+func (msg *SvMotd) Pack() []byte {
 	return packer.PackStr(msg.Message)
 }
 
-func (msg *SvMotd) Unpack(u *packer.Unpacker) {
+func (msg *SvMotd) Unpack(u *packer.Unpacker) error {
 	msg.Message = u.GetString()
+	return nil
 }
 
 func (msg *SvMotd) Header() *chunk7.ChunkHeader {
diff --git a/messages7/sv_team.go b/messages7/sv_team.go
index 1e1fbc0..b9eab55 100644
--- a/messages7/sv_team.go
+++ b/messages7/sv_team.go
@@ -16,23 +16,23 @@ type SvTeam struct {
 	CooldownTick int
 }
 
-func (msg SvTeam) MsgId() int {
+func (msg *SvTeam) MsgId() int {
 	return network7.MsgGameSvTeam
 }
 
-func (msg SvTeam) MsgType() network7.MsgType {
+func (msg *SvTeam) MsgType() network7.MsgType {
 	return network7.TypeNet
 }
 
-func (msg SvTeam) System() bool {
+func (msg *SvTeam) System() bool {
 	return false
 }
 
-func (msg SvTeam) Vital() bool {
+func (msg *SvTeam) Vital() bool {
 	return true
 }
 
-func (msg SvTeam) Pack() []byte {
+func (msg *SvTeam) Pack() []byte {
 	return slices.Concat(
 		packer.PackInt(msg.ClientId),
 		packer.PackBool(msg.Silent),
@@ -40,10 +40,11 @@ func (msg SvTeam) Pack() []byte {
 	)
 }
 
-func (msg *SvTeam) Unpack(u *packer.Unpacker) {
+func (msg *SvTeam) Unpack(u *packer.Unpacker) error {
 	msg.ClientId = u.GetInt()
 	msg.Silent = u.GetInt() != 0
 	msg.CooldownTick = u.GetInt()
+	return nil
 }
 
 func (msg *SvTeam) Header() *chunk7.ChunkHeader {
diff --git a/messages7/unknown.go b/messages7/unknown.go
index 568abb1..fc4d903 100644
--- a/messages7/unknown.go
+++ b/messages7/unknown.go
@@ -14,40 +14,42 @@ type Unknown struct {
 	// can either be a control message or a game/system message
 	Data []byte
 	Type network7.MsgType
+
+	msgId int // TODO: is that supposed to be exported?
 }
 
-func (msg Unknown) MsgId() int {
-	msgId := packer.UnpackInt(msg.Data)
+func (msg *Unknown) MsgId() int {
 	if msg.Type == network7.TypeControl {
-		return msgId
+		return msg.msgId
 	}
-	msgId >>= 1
-	return msgId
+	return msg.msgId >> 1
 }
 
-func (msg Unknown) MsgType() network7.MsgType {
+func (msg *Unknown) MsgType() network7.MsgType {
 	return msg.Type
 }
 
-func (msg Unknown) System() bool {
-	msgId := packer.UnpackInt(msg.Data)
+func (msg *Unknown) System() bool {
 	if msg.Type == network7.TypeControl {
 		return false
 	}
-	sys := msgId&1 != 0
+	sys := msg.msgId&1 != 0
 	return sys
 }
 
-func (msg Unknown) Vital() bool {
+func (msg *Unknown) Vital() bool {
 	panic("You are not mean't to pack unknown messages. Use msg.Header().Vital instead.")
 }
 
-func (msg Unknown) Pack() []byte {
+func (msg *Unknown) Pack() []byte {
 	return msg.Data
 }
 
-func (msg *Unknown) Unpack(u *packer.Unpacker) {
+func (msg *Unknown) Unpack(u *packer.Unpacker) error {
 	msg.Data = u.Rest()
+	msgId := packer.UnpackInt(msg.Data)
+	msg.msgId = msgId
+	return nil
 }
 
 func (msg *Unknown) Header() *chunk7.ChunkHeader {
diff --git a/network7/network7.go b/network7/network7.go
index e2ca2ad..ad45bcc 100644
--- a/network7/network7.go
+++ b/network7/network7.go
@@ -19,6 +19,9 @@ const (
 	MsgCtrlToken     = 0x05
 	MsgCtrlClose     = 0x04
 
+	// TODO: these should preferrably all be devide dinto different type dintegers
+	// same as ChatMode, etc. so that the user can easily see which integer to pass
+	// to which function as which parameter
 	MsgSysInfo            = 1
 	MsgSysMapChange       = 2
 	MsgSysMapData         = 3
diff --git a/packer/packer_state_test.go b/packer/packer_state_test.go
index 5fc8298..a541712 100644
--- a/packer/packer_state_test.go
+++ b/packer/packer_state_test.go
@@ -1,8 +1,9 @@
 package packer
 
 import (
-	"reflect"
 	"testing"
+
+	"github.com/teeworlds-go/go-teeworlds-protocol/internal/testutils/require"
 )
 
 // rest
@@ -12,21 +13,15 @@ func TestUnpackRest(t *testing.T) {
 	u.Reset([]byte{0x01, 0xff, 0xaa})
 
 	{
-		got := u.GetInt()
 		want := 1
-
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got := u.GetInt()
+		require.Equal(t, want, got)
 	}
 
 	{
-		got := u.Rest()
 		want := []byte{0xff, 0xaa}
-
-		if !reflect.DeepEqual(got, want) {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got := u.Rest()
+		require.Equal(t, want, got)
 	}
 }
 
@@ -47,20 +42,14 @@ func TestUnpackClientInfo(t *testing.T) {
 
 	{
 		// message id
-		got := u.GetInt()
 		want := 36
-
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got := u.GetInt()
+		require.Equal(t, want, got)
 
 		// client id
-		got = u.GetInt()
 		want = 0
-
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got = u.GetInt()
+		require.Equal(t, want, got)
 
 		u.GetInt() // Local bool
 		u.GetInt() // Team int
@@ -68,40 +57,28 @@ func TestUnpackClientInfo(t *testing.T) {
 
 	{
 		// name
-		got := u.GetString()
 		want := "gopher"
-
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got := u.GetString()
+		require.Equal(t, want, got)
 
 		// clan
-		got = u.GetString()
 		want = ""
-
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got = u.GetString()
+		require.Equal(t, want, got)
 	}
 
 	{
 		// country
-		got := u.GetInt()
 		want := -1
-
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got := u.GetInt()
+		require.Equal(t, want, got)
 	}
 
 	{
 		// body
-		got := u.GetString()
 		want := "greensward"
-
-		if got != want {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got := u.GetString()
+		require.Equal(t, want, got)
 	}
 }
 
@@ -111,64 +88,44 @@ func TestUnpackSimpleInts(t *testing.T) {
 	u := Unpacker{}
 	u.Reset([]byte{0x01, 0x02, 0x03, 0x0f})
 
-	got := u.GetInt()
 	want := 1
+	got := u.GetInt()
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
-	got = u.GetInt()
 	want = 2
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
 	got = u.GetInt()
+	require.Equal(t, want, got)
+
 	want = 3
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
 	got = u.GetInt()
-	want = 15
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	want = 15
+	got = u.GetInt()
+	require.Equal(t, want, got)
 }
 
 func TestUnpackString(t *testing.T) {
 	u := Unpacker{}
 	u.Reset([]byte{'f', 'o', 'o', 0x00})
 
-	got := u.GetString()
 	want := "foo"
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := u.GetString()
+	require.Equal(t, want, got)
 }
 
 func TestUnpackTwoStrings(t *testing.T) {
 	u := Unpacker{}
 	u.Reset([]byte{'f', 'o', 'o', 0x00, 'b', 'a', 'r', 0x00})
 
-	got := u.GetString()
 	want := "foo"
+	got := u.GetString()
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
-	got = u.GetString()
 	want = "bar"
+	got = u.GetString()
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
 }
 
 func TestUnpackMixed(t *testing.T) {
@@ -177,45 +134,30 @@ func TestUnpackMixed(t *testing.T) {
 
 	// ints
 	{
-		got := u.GetInt()
 		want := 15
+		got := u.GetInt()
+		require.Equal(t, want, got)
 
-		if !reflect.DeepEqual(got, want) {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
-
-		got = u.GetInt()
 		want = 15
-
-		if !reflect.DeepEqual(got, want) {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got = u.GetInt()
+		require.Equal(t, want, got)
 	}
 
 	// strings
 	{
-		got := u.GetString()
 		want := "foo"
+		got := u.GetString()
+		require.Equal(t, want, got)
 
-		if !reflect.DeepEqual(got, want) {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
-
-		got = u.GetString()
 		want = "bar"
-
-		if !reflect.DeepEqual(got, want) {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got = u.GetString()
+		require.Equal(t, want, got)
 	}
 
 	// ints
 	{
-		got := u.GetInt()
 		want := 1
-
-		if !reflect.DeepEqual(got, want) {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		got := u.GetInt()
+		require.Equal(t, want, got)
 	}
 }
diff --git a/packer/packer_test.go b/packer/packer_test.go
index 32656ca..b04ef3d 100644
--- a/packer/packer_test.go
+++ b/packer/packer_test.go
@@ -1,145 +1,95 @@
 package packer
 
 import (
-	"reflect"
 	"testing"
+
+	"github.com/teeworlds-go/go-teeworlds-protocol/internal/testutils/require"
 )
 
 // pack
 
 func TestPackEmptyString(t *testing.T) {
-	got := PackStr("")
 	want := []byte{0x00}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := PackStr("")
+	require.Equal(t, want, got)
 }
 
 func TestPackSimpleString(t *testing.T) {
-	got := PackStr("foo")
 	want := []byte{'f', 'o', 'o', 0x00}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := PackStr("foo")
+	require.Equal(t, want, got)
 }
 
 func TestPackSmallPositiveInts(t *testing.T) {
-	got := PackInt(1)
 	want := []byte{0x01}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := PackInt(1)
+	require.Equal(t, want, got)
 }
 
 func TestPackMultiBytePositiveInts(t *testing.T) {
-	got := PackInt(63)
 	want := []byte{0x3F}
+	got := PackInt(63)
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
-	got = PackInt(64)
 	want = []byte{0x80, 0x01}
+	got = PackInt(64)
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
-	got = PackInt(65)
 	want = []byte{0x81, 0x01}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got = PackInt(65)
+	require.Equal(t, want, got)
 }
 
 func TestPackSmallNegativeInts(t *testing.T) {
-	got := PackInt(-1)
 	want := []byte{0x40}
+	got := PackInt(-1)
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
-	got = PackInt(-2)
 	want = []byte{0x41}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got = PackInt(-2)
+	require.Equal(t, want, got)
 }
 
 func TestPackMultiByteNegativeInts(t *testing.T) {
-	got := PackInt(-63)
 	want := []byte{0x7E}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := PackInt(-63)
+	require.Equal(t, want, got)
 
 	got = PackInt(-64)
 	want = []byte{0x7F}
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
-	got = PackInt(-65)
 	want = []byte{0xC0, 0x01}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got = PackInt(-65)
+	require.Equal(t, want, got)
 }
 
 // unpack
 
 func TestUnpackSmallPositiveInts(t *testing.T) {
-	got := UnpackInt([]byte{0x01})
 	want := 1
+	got := UnpackInt([]byte{0x01})
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
-	got = UnpackInt([]byte{0x02})
 	want = 2
+	got = UnpackInt([]byte{0x02})
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
-	got = UnpackInt([]byte{0x03})
 	want = 3
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got = UnpackInt([]byte{0x03})
+	require.Equal(t, want, got)
 }
 
 func TestUnpackMultiBytePositiveInts(t *testing.T) {
-	got := UnpackInt([]byte{0x3f})
 	want := 63
+	got := UnpackInt([]byte{0x3f})
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
-	got = UnpackInt([]byte{0x80, 0x01})
 	want = 64
+	got = UnpackInt([]byte{0x80, 0x01})
+	require.Equal(t, want, got)
 
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
-
-	got = UnpackInt([]byte{0x81, 0x01})
 	want = 65
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got = UnpackInt([]byte{0x81, 0x01})
+	require.Equal(t, want, got)
 }
diff --git a/protocol7/packet.go b/protocol7/packet.go
index 749de77..b368c94 100644
--- a/protocol7/packet.go
+++ b/protocol7/packet.go
@@ -1,6 +1,7 @@
 package protocol7
 
 import (
+	"fmt"
 	"slices"
 
 	"github.com/teeworlds-go/go-teeworlds-protocol/chunk7"
@@ -11,6 +12,7 @@ import (
 )
 
 const (
+	// TODO: these should preferrably be typed integers
 	packetFlagControl     = 1
 	packetFlagResend      = 2
 	packetFlagCompression = 4
@@ -80,158 +82,122 @@ func PackChunk(msg messages7.NetMessage, connection *Session) []byte {
 	return data
 }
 
-func (packet *Packet) unpackSystem(msgId int, chunk chunk7.Chunk, u *packer.Unpacker) bool {
-	if msgId == network7.MsgSysInfo {
-		msg := &messages7.Info{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysMapChange {
-		msg := &messages7.MapChange{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysMapData {
-		msg := &messages7.MapData{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysServerInfo {
-		msg := &messages7.ServerInfo{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysConReady {
-		msg := &messages7.ConReady{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysSnap {
-		msg := &messages7.Snap{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysSnapEmpty {
-		msg := &messages7.SnapEmpty{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysSnapSingle {
-		msg := &messages7.SnapSingle{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysSnapSmall {
-		msg := &messages7.SnapSmall{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysInputTiming {
-		msg := &messages7.InputTiming{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysRconAuthOn {
-		msg := &messages7.RconAuthOn{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysRconAuthOff {
-		msg := &messages7.RconAuthOff{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysRconLine {
-		msg := &messages7.RconLine{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysRconCmdAdd {
-		msg := &messages7.RconCmdAdd{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysRconCmdRem {
-		msg := &messages7.RconCmdRem{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysAuthChallenge {
-		msg := &messages7.AuthChallenge{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysAuthResult {
-		msg := &messages7.AuthResult{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysReady {
-		msg := &messages7.Ready{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysEnterGame {
-		msg := &messages7.EnterGame{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysInput {
-		msg := &messages7.Input{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysRconCmd {
-		msg := &messages7.RconCmd{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysRconAuth {
-		msg := &messages7.RconAuth{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysRequestMapData {
-		msg := &messages7.RequestMapData{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysAuthStart {
-		msg := &messages7.AuthStart{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysAuthResponse {
-		msg := &messages7.AuthResponse{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysPing {
-		msg := &messages7.Ping{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysPingReply {
-		msg := &messages7.PingReply{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysError {
-		msg := &messages7.Error{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysMaplistEntryAdd {
-		msg := &messages7.MaplistEntryAdd{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgSysMaplistEntryRem {
-		msg := &messages7.MaplistEntryRem{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else {
-		return false
+func (packet *Packet) unpackSystem(msgId int, chunk chunk7.Chunk, u *packer.Unpacker) (bool, error) {
+
+	var msg messages7.NetMessage
+
+	switch msgId {
+	case network7.MsgSysInfo:
+		msg = &messages7.Info{}
+	case network7.MsgSysMapChange:
+		msg = &messages7.MapChange{}
+	case network7.MsgSysMapData:
+		msg = &messages7.MapData{}
+	case network7.MsgSysServerInfo:
+		msg = &messages7.ServerInfo{}
+	case network7.MsgSysConReady:
+		msg = &messages7.ConReady{}
+	case network7.MsgSysSnap:
+		msg = &messages7.Snap{}
+	case network7.MsgSysSnapEmpty:
+		msg = &messages7.SnapEmpty{}
+	case network7.MsgSysSnapSingle:
+		msg = &messages7.SnapSingle{}
+	case network7.MsgSysSnapSmall:
+		msg = &messages7.SnapSmall{}
+	case network7.MsgSysInputTiming:
+		msg = &messages7.InputTiming{}
+	case network7.MsgSysRconAuthOn:
+		msg = &messages7.RconAuthOn{}
+	case network7.MsgSysRconAuthOff:
+		msg = &messages7.RconAuthOff{}
+	case network7.MsgSysRconLine:
+		msg = &messages7.RconLine{}
+	case network7.MsgSysRconCmdAdd:
+		msg = &messages7.RconCmdAdd{}
+	case network7.MsgSysRconCmdRem:
+		msg = &messages7.RconCmdRem{}
+	case network7.MsgSysAuthChallenge:
+		msg = &messages7.AuthChallenge{}
+	case network7.MsgSysAuthResult:
+		msg = &messages7.AuthResult{}
+	case network7.MsgSysReady:
+		msg = &messages7.Ready{}
+	case network7.MsgSysEnterGame:
+		msg = &messages7.EnterGame{}
+	case network7.MsgSysInput:
+		msg = &messages7.Input{}
+	case network7.MsgSysRconCmd:
+		msg = &messages7.RconCmd{}
+	case network7.MsgSysRconAuth:
+		msg = &messages7.RconAuth{}
+	case network7.MsgSysRequestMapData:
+		msg = &messages7.RequestMapData{}
+	case network7.MsgSysAuthStart:
+		msg = &messages7.AuthStart{}
+	case network7.MsgSysAuthResponse:
+		msg = &messages7.AuthResponse{}
+	case network7.MsgSysPing:
+		msg = &messages7.Ping{}
+	case network7.MsgSysPingReply:
+		msg = &messages7.PingReply{}
+	case network7.MsgSysError:
+		msg = &messages7.Error{}
+	case network7.MsgSysMaplistEntryAdd:
+		msg = &messages7.MaplistEntryAdd{}
+	case network7.MsgSysMaplistEntryRem:
+		msg = &messages7.MaplistEntryRem{}
+	default:
+		return false, nil
 	}
-	// packet.Messages[len(packet.Messages)-1].SetHeader(&chunk.Header)
-	return true
+
+	header := chunk.Header // decouple memory by copying only the needed value
+	msg.SetHeader(&header)
+
+	err := msg.Unpack(u)
+	if err != nil {
+		// in case of an error, the user is not supposed to continue
+		// working with the returned first value
+		return false, err
+	}
+
+	packet.Messages = append(packet.Messages, msg)
+	return true, nil
+
 }
 
-func (packet *Packet) unpackGame(msgId int, chunk chunk7.Chunk, u *packer.Unpacker) bool {
-	if msgId == network7.MsgGameReadyToEnter {
-		msg := &messages7.ReadyToEnter{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgGameSvMotd {
-		msg := &messages7.SvMotd{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgGameSvChat {
-		msg := &messages7.SvChat{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else if msgId == network7.MsgGameSvClientInfo {
-		msg := &messages7.SvClientInfo{ChunkHeader: &chunk.Header}
-		msg.Unpack(u)
-		packet.Messages = append(packet.Messages, msg)
-	} else {
-		return false
+func (packet *Packet) unpackGame(msgId int, chunk chunk7.Chunk, u *packer.Unpacker) (bool, error) {
+
+	var msg messages7.NetMessage
+
+	switch msgId {
+	case network7.MsgGameReadyToEnter:
+		msg = &messages7.ReadyToEnter{}
+	case network7.MsgGameSvMotd:
+		msg = &messages7.SvMotd{}
+	case network7.MsgGameSvChat:
+		msg = &messages7.SvChat{}
+	case network7.MsgGameSvClientInfo:
+		msg = &messages7.SvClientInfo{}
+	default:
+		return false, nil
 	}
-	return true
+
+	header := chunk.Header // decouple memory by copying only the needed value
+	msg.SetHeader(&header)
+	err := msg.Unpack(u)
+	if err != nil {
+		// in case of an error, the user is not supposed to continue
+		// working with the returned first value
+		return false, err
+	}
+
+	packet.Messages = append(packet.Messages, msg)
+	return true, nil
+
 }
 
-func (packet *Packet) unpackChunk(chunk chunk7.Chunk) bool {
+func (packet *Packet) unpackChunk(chunk chunk7.Chunk) (bool, error) {
 	u := packer.Unpacker{}
 	u.Reset(chunk.Data)
 
@@ -249,12 +215,20 @@ func (packet *Packet) unpackChunk(chunk chunk7.Chunk) bool {
 func (packet *Packet) unpackPayload(payload []byte) {
 	chunks := chunk7.UnpackChunks(payload)
 
+	var (
+		// reuse variables to avoid reallocation
+		ok  bool
+		err error
+	)
+
 	for _, c := range chunks {
-		if packet.unpackChunk(c) == false {
+		ok, err = packet.unpackChunk(c)
+		if err != nil || !ok {
+			header := c.Header // decouple memory by copying only the needed value
 			unknown := &messages7.Unknown{
-				ChunkHeader: &c.Header,
-				Data:        slices.Concat(c.Header.Pack(), c.Data),
 				Type:        network7.TypeNet,
+				ChunkHeader: &header,
+				Data:        slices.Concat(c.Header.Pack(), c.Data),
 			}
 			packet.Messages = append(packet.Messages, unknown)
 		}
@@ -264,37 +238,42 @@ func (packet *Packet) unpackPayload(payload []byte) {
 // Only returns an error if there is invalid huffman compression applied
 // Unknown messages will be unpacked as messages7.Unknown
 // There is no validation no messages will be dropped
-func (packet *Packet) Unpack(data []byte) error {
-	packet.Header.Unpack(data[:7])
-	payload := data[7:]
+func (packet *Packet) Unpack(data []byte) (err error) {
+	header, payload := data[:7], data[7:]
+	packet.Header.Unpack(header)
 
 	if packet.Header.Flags.Control {
 		unpacker := packer.Unpacker{}
 		unpacker.Reset(payload)
 		ctrlMsg := unpacker.GetInt()
-		if ctrlMsg == network7.MsgCtrlToken {
-			msg := &messages7.CtrlToken{}
-			msg.Unpack(&unpacker)
-			packet.Messages = append(packet.Messages, msg)
-		} else if ctrlMsg == network7.MsgCtrlAccept {
-			packet.Messages = append(packet.Messages, &messages7.CtrlAccept{})
-		} else if ctrlMsg == network7.MsgCtrlClose {
-			msg := &messages7.CtrlClose{}
-			msg.Unpack(&unpacker)
-			packet.Messages = append(packet.Messages, msg)
-		} else {
-			unknown := &messages7.Unknown{
-				Data: payload,
+
+		var msg messages7.NetMessage
+		switch ctrlMsg {
+		case network7.MsgCtrlToken:
+			msg = &messages7.CtrlToken{}
+		case network7.MsgCtrlAccept:
+			msg = &messages7.CtrlAccept{}
+		case network7.MsgCtrlClose:
+			msg = &messages7.CtrlClose{}
+		default:
+			msg = &messages7.Unknown{
 				Type: network7.TypeControl,
 			}
-			packet.Messages = append(packet.Messages, unknown)
 		}
+
+		err := msg.Unpack(&unpacker)
+		if err != nil {
+			return err
+		}
+
+		packet.Messages = append(packet.Messages, msg)
 		return nil
 	}
 
 	if packet.Header.Flags.Compression {
+		// TODO: try avoiding repeated initialization of the huffman tree structure
+		// move this into the Packet struct or even further up
 		huff := huffman.Huffman{}
-		var err error
 		payload, err = huff.Decompress(payload)
 		if err != nil {
 			return err
@@ -319,10 +298,12 @@ func (packet *Packet) Pack(connection *Session) []byte {
 	packet.Header.NumChunks = len(packet.Messages)
 
 	if control {
-		packet.Header.Flags.Connless = false
-		packet.Header.Flags.Compression = false
-		packet.Header.Flags.Resend = false
-		packet.Header.Flags.Control = true
+		packet.Header.Flags = PacketFlags{
+			Connless:    false,
+			Compression: false,
+			Resend:      false,
+			Control:     true,
+		}
 	}
 
 	if packet.Header.Flags.Compression {
@@ -375,23 +356,36 @@ func (header *PacketHeader) Pack() []byte {
 	)
 }
 
-func (header *PacketHeader) Unpack(packet []byte) {
-	header.Flags.Unpack(packet)
+func (header *PacketHeader) Unpack(packet []byte) (err error) {
+	if len(packet) < 7 {
+		return fmt.Errorf("failed to unpack packet header: packet too short: size %d", len(packet))
+	}
+
+	err = header.Flags.Unpack(packet)
+	if err != nil {
+		return fmt.Errorf("failed to unpack packet header: %w", err)
+	}
 	header.Ack = (int(packet[0]&0x3) << 8) | int(packet[1])
 	header.NumChunks = int(packet[2])
 	copy(header.Token[:], packet[3:7])
+	return nil
 }
 
-func (flags *PacketFlags) Unpack(packetHeaderRaw []byte) {
+func (flags *PacketFlags) Unpack(packetHeaderRaw []byte) error {
+	if len(packetHeaderRaw) == 0 {
+		return fmt.Errorf("failed to unpack packet flags: packet header is empty")
+	}
+
 	flagBits := packetHeaderRaw[0] >> 2
 	flags.Control = (flagBits & packetFlagControl) != 0
 	flags.Resend = (flagBits & packetFlagResend) != 0
 	flags.Compression = (flagBits & packetFlagCompression) != 0
 	flags.Connless = (flagBits & packetFlagConnless) != 0
+	return nil
 }
 
 func (flags *PacketFlags) Pack() []byte {
-	data := 0
+	var data byte = 0
 
 	if flags.Control {
 		data |= packetFlagControl
@@ -406,5 +400,5 @@ func (flags *PacketFlags) Pack() []byte {
 		data |= packetFlagConnless
 	}
 
-	return []byte{byte(data)}
+	return []byte{data}
 }
diff --git a/protocol7/packet_test.go b/protocol7/packet_test.go
index 7a99df8..aa92e0a 100644
--- a/protocol7/packet_test.go
+++ b/protocol7/packet_test.go
@@ -1,11 +1,11 @@
 package protocol7
 
 import (
-	"reflect"
 	"slices"
 	"testing"
 
 	"github.com/teeworlds-go/go-teeworlds-protocol/chunk7"
+	"github.com/teeworlds-go/go-teeworlds-protocol/internal/testutils/require"
 	"github.com/teeworlds-go/go-teeworlds-protocol/messages7"
 )
 
@@ -137,12 +137,11 @@ func TestRepackUnknownMessages(t *testing.T) {
 	conn := Session{}
 
 	packet := Packet{}
-	packet.Unpack(dump)
-	repack := packet.Pack(&conn)
+	err := packet.Unpack(dump)
+	require.NoError(t, err)
 
-	if !reflect.DeepEqual(repack, dump) {
-		t.Errorf("got %v, wanted %v", repack, dump)
-	}
+	repack := packet.Pack(&conn)
+	require.Equal(t, dump, repack)
 }
 
 // update chunk headers
@@ -154,16 +153,13 @@ func TestPackUpdateChunkHeaders(t *testing.T) {
 
 	{
 		got := packet.Messages[0].Header()
-
-		if got != nil {
-			t.Errorf("got %v, wanted %v", got, nil)
-		}
+		require.NotNil(t, got)
 	}
 
 	// When packing the chunk header will be set automatically
 	// Based on the current context
 	conn := &Session{Sequence: 1}
-	packet.Pack(conn)
+	_ = packet.Pack(conn)
 
 	{
 		got := packet.Messages[0].Header()
@@ -174,10 +170,7 @@ func TestPackUpdateChunkHeaders(t *testing.T) {
 			Size: 8,
 			Seq:  2,
 		}
-
-		if !reflect.DeepEqual(got, want) {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		require.Equal(t, want, got)
 	}
 
 	// When the chunk header is already set
@@ -192,7 +185,7 @@ func TestPackUpdateChunkHeaders(t *testing.T) {
 		t.Fatal("failed to cast chat message")
 	}
 
-	packet.Pack(conn)
+	_ = packet.Pack(conn)
 
 	{
 		got := packet.Messages[0].Header()
@@ -203,10 +196,7 @@ func TestPackUpdateChunkHeaders(t *testing.T) {
 			Size: 16,
 			Seq:  2,
 		}
-
-		if !reflect.DeepEqual(got, want) {
-			t.Errorf("got %v, wanted %v", got, want)
-		}
+		require.Equal(t, want, got)
 	}
 }
 
@@ -224,12 +214,9 @@ func TestPackHeader(t *testing.T) {
 		NumChunks: 0,
 		Token:     [4]byte{0xcf, 0x2e, 0xde, 0x1d},
 	}
-	got := header.Pack()
 	want := []byte{0x04, 0x0a, 0x00, 0xcf, 0x2e, 0xde, 0x1d}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := header.Pack()
+	require.Equal(t, want, got)
 }
 
 // pack flags
@@ -242,12 +229,9 @@ func TestPackFlagsUnset(t *testing.T) {
 		Control:     false,
 	}
 
-	got := flags.Pack()
 	want := []byte{0b0000}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := flags.Pack()
+	require.Equal(t, want, got)
 }
 
 func TestPackFlagsCompressionSet(t *testing.T) {
@@ -258,12 +242,9 @@ func TestPackFlagsCompressionSet(t *testing.T) {
 		Control:     false,
 	}
 
-	got := flags.Pack()
 	want := []byte{0b0100}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := flags.Pack()
+	require.Equal(t, want, got)
 }
 
 func TestPackFlagsAllSet(t *testing.T) {
@@ -274,50 +255,41 @@ func TestPackFlagsAllSet(t *testing.T) {
 		Control:     true,
 	}
 
-	got := flags.Pack()
 	want := []byte{0b1111}
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := flags.Pack()
+	require.Equal(t, want, got)
 }
 
 // unpack
 
 func TestUnpackFlagsAllSet(t *testing.T) {
-	got := PacketFlags{}
 	want := PacketFlags{
 		Connless:    true,
 		Compression: true,
 		Resend:      true,
 		Control:     true,
 	}
-
-	got.Unpack([]byte{0b00111100})
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := PacketFlags{}
+	err := got.Unpack([]byte{0b00111100})
+	require.NoError(t, err)
+	require.Equal(t, want, got)
 }
 
 func TestUnpackFlagsControlSet(t *testing.T) {
-	got := PacketFlags{}
 	want := PacketFlags{
 		Connless:    false,
 		Compression: false,
 		Resend:      false,
 		Control:     true,
 	}
+	got := PacketFlags{}
 
-	got.Unpack([]byte{0b00000100})
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	err := got.Unpack([]byte{0b00000100})
+	require.NoError(t, err)
+	require.Equal(t, want, got)
 }
 
 func TestUnpackFlagsUnset(t *testing.T) {
-	got := PacketFlags{}
 	want := PacketFlags{
 		Connless:    false,
 		Compression: false,
@@ -325,17 +297,15 @@ func TestUnpackFlagsUnset(t *testing.T) {
 		Control:     false,
 	}
 
-	got.Unpack([]byte{0b00000000})
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := PacketFlags{}
+	err := got.Unpack([]byte{0b00000000})
+	require.NoError(t, err)
+	require.Equal(t, want, got)
 }
 
 // packet header unpack
 
 func TestUnpackCloseWithReason(t *testing.T) {
-	got := PacketHeader{}
 	want := PacketHeader{
 		Flags: PacketFlags{
 			Connless:    false,
@@ -348,15 +318,17 @@ func TestUnpackCloseWithReason(t *testing.T) {
 		Token:     [4]byte{0xcf, 0x2e, 0xde, 0x1d},
 	}
 
-	got.Unpack(slices.Concat([]byte{0x04, 0x0a, 0x00, 0xcf, 0x2e, 0xde, 0x1d, 0x04}, []byte("shutdown"), []byte{0x00}))
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := PacketHeader{}
+	err := got.Unpack(slices.Concat(
+		[]byte{0x04, 0x0a, 0x00, 0xcf, 0x2e, 0xde, 0x1d, 0x04},
+		[]byte("shutdown"),
+		[]byte{0x00},
+	))
+	require.NoError(t, err)
+	require.Equal(t, want, got)
 }
 
 func TestUnpackHeaderFlagsControlSet(t *testing.T) {
-	got := PacketHeader{}
 	want := PacketHeader{
 		Flags: PacketFlags{
 			Connless:    false,
@@ -369,15 +341,13 @@ func TestUnpackHeaderFlagsControlSet(t *testing.T) {
 		Token:     [4]byte{0xff, 0xff, 0xff, 0xff},
 	}
 
-	got.Unpack([]byte{0b00000100, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff})
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := PacketHeader{}
+	err := got.Unpack([]byte{0b00000100, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff})
+	require.NoError(t, err)
+	require.Equal(t, want, got)
 }
 
 func TestUnpackHeaderFlagsAllSet(t *testing.T) {
-	got := PacketHeader{}
 	want := PacketHeader{
 		Flags: PacketFlags{
 			Connless:    true,
@@ -390,9 +360,8 @@ func TestUnpackHeaderFlagsAllSet(t *testing.T) {
 		Token:     [4]byte{0xff, 0xff, 0xff, 0xff},
 	}
 
-	got.Unpack([]byte{0b00111100, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff})
-
-	if !reflect.DeepEqual(got, want) {
-		t.Errorf("got %v, wanted %v", got, want)
-	}
+	got := PacketHeader{}
+	err := got.Unpack([]byte{0b00111100, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff})
+	require.NoError(t, err)
+	require.Equal(t, want, got)
 }