[windows_kext] Fix some Go linter warnings

windows_kext/kext_interface/command.go

@@ -5,6 +5,7 @@ import (
 	"io"
 )
 
+// Command IDs.
 const (
 	CommandShutdown              = 0
 	CommandVerdict               = 1
@@ -17,8 +18,10 @@ const (
 	CommandCleanEndedConnections = 8
 )
 
+// KextVerdict is the verdict ID used to with the kext.
 type KextVerdict uint8
 
+// Kext Verdicts.
 // Make sure this is in sync with the Rust version.
 const (
 	// VerdictUndecided is the default status of new connections.
@@ -37,20 +40,20 @@ const (
 
 type Verdict struct {
 	command uint8
-	Id      uint64
+	ID      uint64
 	Verdict uint8
 }
 
 type RedirectV4 struct {
 	command       uint8
-	Id            uint64
+	ID            uint64
 	RemoteAddress [4]byte
 	RemotePort    uint16
 }
 
 type RedirectV6 struct {
 	command       uint8
-	Id            uint64
+	ID            uint64
 	RemoteAddress [16]byte
 	RemotePort    uint16
 }
@@ -75,46 +78,55 @@ type UpdateV6 struct {
 	Verdict       uint8
 }
 
+// SendShutdownCommand sends a Shutdown command to the kext.
 func SendShutdownCommand(writer io.Writer) error {
 	_, err := writer.Write([]byte{CommandShutdown})
 	return err
 }
 
+// SendVerdictCommand sends a Verdict command to the kext.
 func SendVerdictCommand(writer io.Writer, verdict Verdict) error {
 	verdict.command = CommandVerdict
 	return binary.Write(writer, binary.LittleEndian, verdict)
 }
 
+// SendUpdateV4Command sends a UpdateV4 command to the kext.
 func SendUpdateV4Command(writer io.Writer, update UpdateV4) error {
 	update.command = CommandUpdateV4
 	return binary.Write(writer, binary.LittleEndian, update)
 }
 
+// SendUpdateV6Command sends a UpdateV6 command to the kext.
 func SendUpdateV6Command(writer io.Writer, update UpdateV6) error {
 	update.command = CommandUpdateV6
 	return binary.Write(writer, binary.LittleEndian, update)
 }
 
+// SendClearCacheCommand sends a ClearCache command to the kext.
 func SendClearCacheCommand(writer io.Writer) error {
 	_, err := writer.Write([]byte{CommandClearCache})
 	return err
 }
 
+// SendGetLogsCommand sends a GetLogs command to the kext.
 func SendGetLogsCommand(writer io.Writer) error {
 	_, err := writer.Write([]byte{CommandGetLogs})
 	return err
 }
 
+// SendGetBandwidthStatsCommand sends a GetBandwidthStats command to the kext.
 func SendGetBandwidthStatsCommand(writer io.Writer) error {
 	_, err := writer.Write([]byte{CommandBandwidthStats})
 	return err
 }
 
+// SendPrintMemoryStatsCommand sends a PrintMemoryStats command to the kext.
 func SendPrintMemoryStatsCommand(writer io.Writer) error {
 	_, err := writer.Write([]byte{CommandPrintMemoryStats})
 	return err
 }
 
+// SendCleanEndedConnectionsCommand sends a CleanEndedConnections command to the kext.
 func SendCleanEndedConnectionsCommand(writer io.Writer) error {
 	_, err := writer.Write([]byte{CommandCleanEndedConnections})
 	return err

windows_kext/kext_interface/info.go

@@ -23,8 +23,8 @@ type connectionV4Internal struct {
 	ProcessId    uint64
 	Direction    byte
 	Protocol     byte
-	LocalIp      [4]byte
-	RemoteIp     [4]byte
+	LocalIP      [4]byte
+	RemoteIP     [4]byte
 	LocalPort    uint16
 	RemotePort   uint16
 	PayloadLayer uint8
@@ -40,19 +40,19 @@ func (c *ConnectionV4) Compare(other *ConnectionV4) bool {
 		c.ProcessId == other.ProcessId &&
 		c.Direction == other.Direction &&
 		c.Protocol == other.Protocol &&
-		c.LocalIp == other.LocalIp &&
-		c.RemoteIp == other.RemoteIp &&
+		c.LocalIP == other.LocalIP &&
+		c.RemoteIP == other.RemoteIP &&
 		c.LocalPort == other.LocalPort &&
 		c.RemotePort == other.RemotePort
 }
 
 type connectionV6Internal struct {
 	Id           uint64
-	ProcessId    uint64
+	ProcessID    uint64
 	Direction    byte
 	Protocol     byte
-	LocalIp      [16]byte
-	RemoteIp     [16]byte
+	LocalIP      [16]byte
+	RemoteIP     [16]byte
 	LocalPort    uint16
 	RemotePort   uint16
 	PayloadLayer uint8
@@ -65,11 +65,11 @@ type ConnectionV6 struct {
 
 func (c ConnectionV6) Compare(other *ConnectionV6) bool {
 	return c.Id == other.Id &&
-		c.ProcessId == other.ProcessId &&
+		c.ProcessID == other.ProcessID &&
 		c.Direction == other.Direction &&
 		c.Protocol == other.Protocol &&
-		c.LocalIp == other.LocalIp &&
-		c.RemoteIp == other.RemoteIp &&
+		c.LocalIP == other.LocalIP &&
+		c.RemoteIP == other.RemoteIP &&
 		c.LocalPort == other.LocalPort &&
 		c.RemotePort == other.RemotePort
 }

windows_kext/kext_interface/kext_file_test.go

@@ -9,4 +9,4 @@ func (f *KextFile) Read(buffer []byte) (int, error) {
 	return 0, nil
 }
 
-func (f *KextFile) flush_buffer() {}
+func (f *KextFile) flushBuffer() {}

windows_kext/kext_interface/protocol_test.go

@@ -2,6 +2,7 @@ package kext_interface
 
 import (
 	"bytes"
+	"errors"
 	"io"
 	"math/rand"
 	"os"
@@ -9,36 +10,42 @@ import (
 )
 
 func TestRustInfoFile(t *testing.T) {
+	t.Parallel()
+
 	file, err := os.Open("../protocol/rust_info_test.bin")
 	if err != nil {
 		panic(err)
 	}
-	defer file.Close()
+	defer func() {
+		_ = file.Close()
+	}()
 	for {
 		info, err := RecvInfo(file)
 		if err != nil {
-			if err != io.EOF {
+			if errors.Is(err, io.EOF) {
 				t.Errorf("unexpected error: %s\n", err)
 			}
 			return
 		}
-		if info.LogLine != nil {
+
+		switch {
+		case info.LogLine != nil:
 			if info.LogLine.Severity != 1 {
 				t.Errorf("unexpected Log severity: %d\n", info.LogLine.Severity)
 			}
-
 			if info.LogLine.Line != "prefix: test log" {
 				t.Errorf("unexpected Log line: %s\n", info.LogLine.Line)
 			}
-		} else if info.ConnectionV4 != nil {
+
+		case info.ConnectionV4 != nil:
 			conn := info.ConnectionV4
 			expected := connectionV4Internal{
 				Id:           1,
 				ProcessId:    2,
 				Direction:    3,
 				Protocol:     4,
-				LocalIp:      [4]byte{1, 2, 3, 4},
-				RemoteIp:     [4]byte{2, 3, 4, 5},
+				LocalIP:      [4]byte{1, 2, 3, 4},
+				RemoteIP:     [4]byte{2, 3, 4, 5},
 				LocalPort:    5,
 				RemotePort:   6,
 				PayloadLayer: 7,
@@ -49,15 +56,16 @@ func TestRustInfoFile(t *testing.T) {
 			if !bytes.Equal(conn.Payload, []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}) {
 				t.Errorf("unexpected ConnectionV4 payload: %+v\n", conn.Payload)
 			}
-		} else if info.ConnectionV6 != nil {
+
+		case info.ConnectionV6 != nil:
 			conn := info.ConnectionV6
 			expected := connectionV6Internal{
 				Id:           1,
-				ProcessId:    2,
+				ProcessID:    2,
 				Direction:    3,
 				Protocol:     4,
-				LocalIp:      [16]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
-				RemoteIp:     [16]byte{2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17},
+				LocalIP:      [16]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
+				RemoteIP:     [16]byte{2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17},
 				LocalPort:    5,
 				RemotePort:   6,
 				PayloadLayer: 7,
@@ -68,7 +76,8 @@ func TestRustInfoFile(t *testing.T) {
 			if !bytes.Equal(conn.Payload, []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}) {
 				t.Errorf("unexpected ConnectionV6 payload: %+v\n", conn.Payload)
 			}
-		} else if info.ConnectionEndV4 != nil {
+
+		case info.ConnectionEndV4 != nil:
 			endEvent := info.ConnectionEndV4
 			expected := ConnectionEndV4{
 				ProcessId:  1,
@@ -82,7 +91,8 @@ func TestRustInfoFile(t *testing.T) {
 			if *endEvent != expected {
 				t.Errorf("unexpected ConnectionEndV4: %+v\n", endEvent)
 			}
-		} else if info.ConnectionEndV6 != nil {
+
+		case info.ConnectionEndV6 != nil:
 			endEvent := info.ConnectionEndV6
 			expected := ConnectionEndV6{
 				ProcessId:  1,
@@ -96,7 +106,8 @@ func TestRustInfoFile(t *testing.T) {
 			if *endEvent != expected {
 				t.Errorf("unexpected ConnectionEndV6: %+v\n", endEvent)
 			}
-		} else if info.BandwidthStats != nil {
+
+		case info.BandwidthStats != nil:
 			stats := info.BandwidthStats
 			if stats.Protocol != 1 {
 				t.Errorf("unexpected Bandwidth stats protocol: %d\n", stats.Protocol)
@@ -163,11 +174,15 @@ func TestRustInfoFile(t *testing.T) {
 }
 
 func TestGenerateCommandFile(t *testing.T) {
+	t.Parallel()
+
 	file, err := os.Create("go_command_test.bin")
 	if err != nil {
 		t.Errorf("failed to create file: %s", err)
 	}
-	defer file.Close()
+	defer func() {
+		_ = file.Close()
+	}()
 	enums := []byte{
 		CommandShutdown,
 		CommandVerdict,
@@ -181,64 +196,80 @@ func TestGenerateCommandFile(t *testing.T) {
 
 	selected := make([]byte, 5000)
 	for i := range selected {
-		selected[i] = enums[rand.Intn(len(enums))]
+		selected[i] = enums[rand.Intn(len(enums))] //nolint:gosec
 	}
 
 	for _, value := range selected {
 		switch value {
 		case CommandShutdown:
-			{
-				SendShutdownCommand(file)
+			err := SendShutdownCommand(file)
+			if err != nil {
+				t.Fatal(err)
 			}
-		case CommandVerdict:
-			{
-				SendVerdictCommand(file, Verdict{
-					Id:      1,
-					Verdict: 2,
-				})
-			}
-		case CommandUpdateV4:
-			{
-				SendUpdateV4Command(file, UpdateV4{
-					Protocol:      1,
-					LocalAddress:  [4]byte{1, 2, 3, 4},
-					LocalPort:     2,
-					RemoteAddress: [4]byte{2, 3, 4, 5},
-					RemotePort:    3,
-					Verdict:       4,
-				})
-			}
-		case CommandUpdateV6:
-			{
 
-				SendUpdateV6Command(file, UpdateV6{
-					Protocol:      1,
-					LocalAddress:  [16]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
-					LocalPort:     2,
-					RemoteAddress: [16]byte{2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17},
-					RemotePort:    3,
-					Verdict:       4,
-				})
+		case CommandVerdict:
+			err := SendVerdictCommand(file, Verdict{
+				ID:      1,
+				Verdict: 2,
+			})
+			if err != nil {
+				t.Fatal(err)
 			}
+
+		case CommandUpdateV4:
+			err := SendUpdateV4Command(file, UpdateV4{
+				Protocol:      1,
+				LocalAddress:  [4]byte{1, 2, 3, 4},
+				LocalPort:     2,
+				RemoteAddress: [4]byte{2, 3, 4, 5},
+				RemotePort:    3,
+				Verdict:       4,
+			})
+			if err != nil {
+				t.Fatal(err)
+			}
+
+		case CommandUpdateV6:
+			err := SendUpdateV6Command(file, UpdateV6{
+				Protocol:      1,
+				LocalAddress:  [16]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
+				LocalPort:     2,
+				RemoteAddress: [16]byte{2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17},
+				RemotePort:    3,
+				Verdict:       4,
+			})
+			if err != nil {
+				t.Fatal(err)
+			}
+
 		case CommandClearCache:
-			{
-				SendClearCacheCommand(file)
+			err := SendClearCacheCommand(file)
+			if err != nil {
+				t.Fatal(err)
 			}
+
 		case CommandGetLogs:
-			{
-				SendGetLogsCommand(file)
+			err := SendGetLogsCommand(file)
+			if err != nil {
+				t.Fatal(err)
 			}
+
 		case CommandBandwidthStats:
-			{
-				SendGetBandwidthStatsCommand(file)
+			err := SendGetBandwidthStatsCommand(file)
+			if err != nil {
+				t.Fatal(err)
 			}
+
 		case CommandPrintMemoryStats:
-			{
-				SendPrintMemoryStatsCommand(file)
+			err := SendPrintMemoryStatsCommand(file)
+			if err != nil {
+				t.Fatal(err)
 			}
+
 		case CommandCleanEndedConnections:
-			{
-				SendCleanEndedConnectionsCommand(file)
+			err := SendCleanEndedConnectionsCommand(file)
+			if err != nil {
+				t.Fatal(err)
 			}
 		}
 	}

windows_kext/wdk/README.md

@@ -11,4 +11,4 @@ see: `wdk/src/irp_helper.rs`
 
 Open issues need to be resolved:
 https://github.com/microsoft/wdkmetadata/issues/59
-https://github.com/microsoft/windows-rs/issues/2805
+https://github.com/microsoft/windows-rs/issues/2805