Removed unused code and linting fixes

Another bunch of gosec/golint related fixes

Remove method no longer used

db.go

@@ -106,6 +106,7 @@ func (h *Headscale) initDB() error {
 						Err(err).
 						Str("enabled_route", prefix.String()).
 						Msg("Error parsing enabled_route")
+
 					continue
 				}
 
@@ -114,6 +115,7 @@ func (h *Headscale) initDB() error {
 					log.Info().
 						Str("enabled_route", prefix.String()).
 						Msg("Route already migrated to new table, skipping")
+
 					continue
 				}
 
@@ -335,6 +337,7 @@ func (i *IPPrefix) Scan(destination interface{}) error {
 			return err
 		}
 		*i = IPPrefix(prefix)
+
 		return nil
 	default:
 		return fmt.Errorf("%w: unexpected data type %T", ErrCannotParsePrefix, destination)
@@ -344,6 +347,7 @@ func (i *IPPrefix) Scan(destination interface{}) error {
 // Value return json value, implement driver.Valuer interface.
 func (i IPPrefix) Value() (driver.Value, error) {
 	prefixStr := netip.Prefix(i).String()
+
 	return prefixStr, nil
 }
 

machine.go

@@ -941,6 +941,7 @@ func (h *Headscale) GetAdvertisedRoutes(machine *Machine) ([]netip.Prefix, error
 			Err(err).
 			Str("machine", machine.Hostname).
 			Msg("Could not get advertised routes for machine")
+
 		return nil, err
 	}
 
@@ -966,6 +967,7 @@ func (h *Headscale) GetEnabledRoutes(machine *Machine) ([]netip.Prefix, error) {
 			Err(err).
 			Str("machine", machine.Hostname).
 			Msg("Could not get enabled routes for machine")
+
 		return nil, err
 	}
 
@@ -986,6 +988,7 @@ func (h *Headscale) IsRoutesEnabled(machine *Machine, routeStr string) bool {
 	enabledRoutes, err := h.GetEnabledRoutes(machine)
 	if err != nil {
 		log.Error().Err(err).Msg("Could not get enabled routes")
+
 		return false
 	}
 
@@ -1106,9 +1109,9 @@ func (h *Headscale) EnableAutoApprovedRoutes(machine *Machine) error {
 		}
 	}
 
-	for _, approvedRoute := range approvedRoutes {
-		approvedRoute.Enabled = true
-		err = h.db.Save(&approvedRoute).Error
+	for i, approvedRoute := range approvedRoutes {
+		approvedRoutes[i].Enabled = true
+		err = h.db.Save(&approvedRoutes[i]).Error
 		if err != nil {
 			log.Err(err).
 				Str("approvedRoute", approvedRoute.String()).
@@ -1122,25 +1125,6 @@ func (h *Headscale) EnableAutoApprovedRoutes(machine *Machine) error {
 	return nil
 }
 
-func (h *Headscale) RoutesToProto(machine *Machine) *v1.Routes {
-	availableRoutes, err := h.GetAdvertisedRoutes(machine)
-	if err != nil {
-		log.Error().Err(err).Msg("Could not get advertised routes")
-		return nil
-	}
-
-	enabledRoutes, err := h.GetEnabledRoutes(machine)
-	if err != nil {
-		log.Error().Err(err).Msg("Could not get enabled routes")
-		return nil
-	}
-
-	return &v1.Routes{
-		AdvertisedRoutes: ipPrefixToString(availableRoutes),
-		EnabledRoutes:    ipPrefixToString(enabledRoutes),
-	}
-}
-
 func (h *Headscale) generateGivenName(suppliedName string, randomSuffix bool) (string, error) {
 	normalizedHostname, err := NormalizeToFQDNRules(
 		suppliedName,

machine_test.go

@@ -1159,7 +1159,9 @@ func (s *Suite) TestAutoApproveRoutes(c *check.C) {
 	machine0ByID, err := app.GetMachineByID(0)
 	c.Assert(err, check.IsNil)
 
-	app.EnableAutoApprovedRoutes(machine0ByID)
+	err = app.EnableAutoApprovedRoutes(machine0ByID)
+	c.Assert(err, check.IsNil)
+
 	enabledRoutes, err := app.GetEnabledRoutes(machine0ByID)
 	c.Assert(err, check.IsNil)
 	c.Assert(enabledRoutes, check.HasLen, 3)

protocol_common_poll.go

@@ -53,7 +53,15 @@ func (h *Headscale) handlePollCommon(
 		}
 
 		// update routes with peer information
-		h.EnableAutoApprovedRoutes(machine)
+		err = h.EnableAutoApprovedRoutes(machine)
+		if err != nil {
+			log.Error().
+				Caller().
+				Bool("noise", isNoise).
+				Str("machine", machine.Hostname).
+				Err(err).
+				Msg("Error running auto approved routes")
+		}
 	}
 
 	// From Tailscale client:

routes.go

@@ -1,6 +1,7 @@
 package headscale
 
 import (
+	"errors"
 	"fmt"
 	"net/netip"
 
@@ -44,10 +45,11 @@ func (rs Routes) toPrefixes() []netip.Prefix {
 	for i, r := range rs {
 		prefixes[i] = netip.Prefix(r.Prefix)
 	}
+
 	return prefixes
 }
 
-// isUniquePrefix returns if there is another machine providing the same route already
+// isUniquePrefix returns if there is another machine providing the same route already.
 func (h *Headscale) isUniquePrefix(route Route) bool {
 	var count int64
 	h.db.
@@ -56,6 +58,7 @@ func (h *Headscale) isUniquePrefix(route Route) bool {
 			route.Prefix,
 			route.MachineID,
 			true, true).Count(&count)
+
 	return count == 0
 }
 
@@ -65,11 +68,11 @@ func (h *Headscale) getPrimaryRoute(prefix netip.Prefix) (*Route, error) {
 		Preload("Machine").
 		Where("prefix = ? AND advertised = ? AND enabled = ? AND is_primary = ?", IPPrefix(prefix), true, true, true).
 		First(&route).Error
-	if err != nil && err != gorm.ErrRecordNotFound {
+	if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
 		return nil, err
 	}
 
-	if err == gorm.ErrRecordNotFound {
+	if errors.Is(err, gorm.ErrRecordNotFound) {
 		return nil, gorm.ErrRecordNotFound
 	}
 
@@ -77,7 +80,7 @@ func (h *Headscale) getPrimaryRoute(prefix netip.Prefix) (*Route, error) {
 }
 
 // getMachinePrimaryRoutes returns the routes that are enabled and marked as primary (for subnet failover)
-// Exit nodes are not considered for this, as they are never marked as Primary
+// Exit nodes are not considered for this, as they are never marked as Primary.
 func (h *Headscale) getMachinePrimaryRoutes(m *Machine) ([]Route, error) {
 	var routes []Route
 	err := h.db.
@@ -103,24 +106,22 @@ func (h *Headscale) processMachineRoutes(machine *Machine) error {
 		advertisedRoutes[prefix] = false
 	}
 
-	for _, route := range currentRoutes {
+	for pos, route := range currentRoutes {
 		if _, ok := advertisedRoutes[netip.Prefix(route.Prefix)]; ok {
 			if !route.Advertised {
-				route.Advertised = true
-				err := h.db.Save(&route).Error
+				currentRoutes[pos].Advertised = true
+				err := h.db.Save(&currentRoutes[pos]).Error
 				if err != nil {
 					return err
 				}
 			}
 			advertisedRoutes[netip.Prefix(route.Prefix)] = true
-		} else {
-			if route.Advertised {
-				route.Advertised = false
-				route.Enabled = false
-				err := h.db.Save(&route).Error
-				if err != nil {
-					return err
-				}
+		} else if route.Advertised {
+			currentRoutes[pos].Advertised = false
+			currentRoutes[pos].Enabled = false
+			err := h.db.Save(&currentRoutes[pos]).Error
+			if err != nil {
+				return err
 			}
 		}
 	}
@@ -150,25 +151,26 @@ func (h *Headscale) handlePrimarySubnetFailover() error {
 		Preload("Machine").
 		Where("advertised = ? AND enabled = ?", true, true).
 		Find(&routes).Error
-	if err != nil && err != gorm.ErrRecordNotFound {
+	if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
 		log.Error().Err(err).Msg("error getting routes")
 	}
 
-	for _, route := range routes {
+	for pos, route := range routes {
 		if route.isExitRoute() {
 			continue
 		}
 
 		if !route.IsPrimary {
 			_, err := h.getPrimaryRoute(netip.Prefix(route.Prefix))
-			if h.isUniquePrefix(route) || err == gorm.ErrRecordNotFound {
-				route.IsPrimary = true
-				err := h.db.Save(&route).Error
+			if h.isUniquePrefix(route) || errors.Is(err, gorm.ErrRecordNotFound) {
+				routes[pos].IsPrimary = true
+				err := h.db.Save(&routes[pos]).Error
 				if err != nil {
 					log.Error().Err(err).Msg("error marking route as primary")
 
 					return err
 				}
+
 				continue
 			}
 		}
@@ -193,16 +195,17 @@ func (h *Headscale) handlePrimarySubnetFailover() error {
 					route.MachineID,
 					true, true).
 				Find(&newPrimaryRoutes).Error
-			if err != nil && err != gorm.ErrRecordNotFound {
+			if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
 				log.Error().Err(err).Msg("error finding new primary route")
 
 				return err
 			}
 
 			var newPrimaryRoute *Route
-			for _, r := range newPrimaryRoutes {
+			for pos, r := range newPrimaryRoutes {
 				if r.Machine.isOnline() {
-					newPrimaryRoute = &r
+					newPrimaryRoute = &newPrimaryRoutes[pos]
+
 					break
 				}
 			}
@@ -212,6 +215,7 @@ func (h *Headscale) handlePrimarySubnetFailover() error {
 					Str("machine", route.Machine.Hostname).
 					Str("prefix", netip.Prefix(route.Prefix).String()).
 					Msgf("no alternative primary route found")
+
 				continue
 			}
 
@@ -222,8 +226,8 @@ func (h *Headscale) handlePrimarySubnetFailover() error {
 				Msgf("found new primary route")
 
 			// disable the old primary route
-			route.IsPrimary = false
-			err = h.db.Save(&route).Error
+			routes[pos].IsPrimary = false
+			err = h.db.Save(&routes[pos]).Error
 			if err != nil {
 				log.Error().Err(err).Msg("error disabling old primary route")