Fix linter errors

network/database.go

@@ -63,7 +63,8 @@ func (s *StorageInterface) Get(key string) (record.Record, error) {
 		if len(splitted) >= 2 {
 			switch splitted[1] {
 			case "state":
-				return state.GetStateInfo(), nil
+				return state.GetInfo(), nil
+			default:
 			}
 		}
 	}

network/module.go

@@ -1,17 +1,12 @@
 package network
 
 import (
-	"net"
-
 	"github.com/safing/portbase/modules"
 )
 
 var (
 	module *modules.Module
 
-	dnsAddress        = net.IPv4(127, 0, 0, 1)
-	dnsPort    uint16 = 53
-
 	defaultFirewallHandler FirewallHandler
 )
 

network/state/exists.go

@@ -8,6 +8,7 @@ import (
 )
 
 const (
+	// UDPConnectionTTL defines the duration after which unseen UDP connections are regarded as ended.
 	UDPConnectionTTL = 10 * time.Minute
 )
 

network/state/info.go

@@ -8,7 +8,8 @@ import (
 	"github.com/safing/portmaster/network/socket"
 )
 
-type StateInfo struct {
+// Info holds network state information as provided by the system.
+type Info struct {
 	record.Base
 	sync.Mutex
 
@@ -20,8 +21,9 @@ type StateInfo struct {
 	UDP6Binds       []*socket.BindInfo
 }
 
-func GetStateInfo() *StateInfo {
-	info := &StateInfo{}
+// GetInfo returns all system state tables. The returned data must not be modified.
+func GetInfo() *Info {
+	info := &Info{}
 
 	tcp4Lock.Lock()
 	updateTCP4Tables()

network/state/lookup.go

@@ -39,6 +39,7 @@ var (
 	baseWaitTime = 3 * time.Millisecond
 )
 
+// Lookup looks for the given connection in the system state tables and returns the PID of the associated process and whether the connection is inbound.
 func Lookup(pktInfo *packet.Info) (pid int, inbound bool, err error) {
 	// auto-detect version
 	if pktInfo.Version == 0 {

network/state/udp.go

@@ -14,8 +14,13 @@ type udpState struct {
 }
 
 const (
-	UdpConnStateTTL             = 72 * time.Hour
-	UdpConnStateShortenedTTL    = 3 * time.Hour
+	// UDPConnStateTTL is the maximum time a udp connection state is held.
+	UDPConnStateTTL = 72 * time.Hour
+
+	// UDPConnStateShortenedTTL is a shortened maximum time a udp connection state is held, if there more entries than defined by AggressiveCleaningThreshold.
+	UDPConnStateShortenedTTL = 3 * time.Hour
+
+	// AggressiveCleaningThreshold defines the soft limit of udp connection state held per udp socket.
 	AggressiveCleaningThreshold = 256
 )
 
@@ -60,29 +65,29 @@ func getUDPDirection(socketInfo *socket.BindInfo, udpStates map[string]map[strin
 	return udpConnState.inbound
 }
 
-func CleanUDPStates(ctx context.Context) {
+// CleanUDPStates cleans the udp connection states which save connection directions.
+func CleanUDPStates(_ context.Context) {
 	now := time.Now().UTC()
 
 	udp4Lock.Lock()
 	updateUDP4Table()
-	cleanStates(ctx, udp4Binds, udp4States, now)
+	cleanStates(udp4Binds, udp4States, now)
 	udp4Lock.Unlock()
 
 	udp6Lock.Lock()
 	updateUDP6Table()
-	cleanStates(ctx, udp6Binds, udp6States, now)
+	cleanStates(udp6Binds, udp6States, now)
 	udp6Lock.Unlock()
 }
 
 func cleanStates(
-	ctx context.Context,
 	binds []*socket.BindInfo,
 	udpStates map[string]map[string]*udpState,
 	now time.Time,
 ) {
 	// compute thresholds
-	threshold := now.Add(-UdpConnStateTTL)
-	shortThreshhold := now.Add(-UdpConnStateShortenedTTL)
+	threshold := now.Add(-UDPConnStateTTL)
+	shortThreshhold := now.Add(-UDPConnStateShortenedTTL)
 
 	// make lookup map of all active keys
 	bindKeys := make(map[string]struct{})

process/find.go

@@ -15,7 +15,7 @@ var (
 	ErrProcessNotFound = errors.New("could not find process in system state tables")
 )
 
-// GetProcessByEndpoints returns the process that owns the described link.
+// GetProcessByConnection returns the process that owns the described connection.
 func GetProcessByConnection(ctx context.Context, pktInfo *packet.Info) (process *Process, connInbound bool, err error) {
 	if !enableProcessDetection() {
 		log.Tracer(ctx).Tracef("process: process detection disabled")

updates/upgrader.go

@@ -230,6 +230,7 @@ func upgradeFile(fileToUpgrade string, file *updater.File) error {
 	return nil
 }
 
+// CopyFile atomically copies a file using the update registry's tmp dir.
 func CopyFile(srcPath, dstPath string) (err error) {
 
 	// check tmp dir