netlink: move func AddRoute/DelRoute

netlink/link_darwin.go

@@ -25,20 +25,6 @@ func SetupLink(ifName, cidr string) error {
 	return AddRoute(ifName, ipnet, nil)
 }
 
-func AddRoute(ifName string, to *net.IPNet, _ net.IP) error {
-	if to.IP.To4() == nil { // ipv6
-		return exec.Command("route", "-qn", "add", "-inet6", to.String(), "-iface", ifName).Run()
-	}
-	return exec.Command("route", "-qn", "add", "-inet", to.String(), "-iface", ifName).Run()
-}
-
-func DelRoute(_ string, to *net.IPNet, _ net.IP) error {
-	if to.IP.To4() == nil { // ipv6
-		return exec.Command("route", "-qn", "delete", "-inet6", to.String()).Run()
-	}
-	return exec.Command("route", "-qn", "delete", "-inet", to.String()).Run()
-}
-
 func LinkByIndex(index int) (*Link, error) {
 	return nil, errors.ErrUnsupported
 }

netlink/link_default.go

@@ -4,7 +4,6 @@ package netlink
 
 import (
 	"errors"
-	"net"
 )
 
 func SetupLink(string, string) error {
@@ -12,16 +11,6 @@ func SetupLink(string, string) error {
 	return nil
 }
 
-func AddRoute(string, *net.IPNet, net.IP) error {
-	// noop
-	return nil
-}
-
-func DelRoute(string, *net.IPNet, net.IP) error {
-	// noop
-	return nil
-}
-
 func LinkByIndex(index int) (*Link, error) {
 	return nil, errors.ErrUnsupported
 }

netlink/link_linux.go

@@ -4,7 +4,6 @@ package netlink
 
 import (
 	"errors"
-	"net"
 
 	"github.com/vishvananda/netlink"
 )
@@ -35,20 +34,6 @@ func SetupLink(ifName, cidr string) error {
 	return nil
 }
 
-func AddRoute(_ string, to *net.IPNet, via net.IP) error {
-	return netlink.RouteAdd(&netlink.Route{
-		Dst: to,
-		Gw:  via,
-	})
-}
-
-func DelRoute(_ string, to *net.IPNet, via net.IP) error {
-	return netlink.RouteDel(&netlink.Route{
-		Dst: to,
-		Gw:  via,
-	})
-}
-
 func LinkByIndex(index int) (*Link, error) {
 	l, err := netlink.LinkByIndex(index)
 	if err != nil {

netlink/link_windows.go

@@ -25,22 +25,6 @@ func SetupLink(ifName, cidr string) error {
 	return exec.Command("netsh", "interface", "ipv4", "set", "address", ifName, "static", ip.String(), addrMask).Run()
 }
 
-func AddRoute(ifName string, to *net.IPNet, via net.IP) error {
-	if via.To4() == nil { // ipv6
-		return exec.Command("netsh", "interface", "ipv6", "add", "route", to.String(), ifName, via.String()).Run()
-	}
-	// ipv4
-	addrMask := fmt.Sprintf("%d.%d.%d.%d", to.Mask[0], to.Mask[1], to.Mask[2], to.Mask[3])
-	return exec.Command("route", "add", to.IP.String(), "mask", addrMask, via.String()).Run()
-}
-
-func DelRoute(ifName string, to *net.IPNet, via net.IP) error {
-	if via.To4() == nil { // ipv6
-		return exec.Command("netsh", "interface", "ipv6", "delete", "route", to.String(), ifName, via.String()).Run()
-	}
-	return exec.Command("route", "delete", to.IP.String()).Run()
-}
-
 func LinkByIndex(index int) (*Link, error) {
 	luid, err := winipcfg.LUIDFromIndex(uint32(index))
 	if err != nil {

netlink/route_darwin.go

@@ -7,6 +7,7 @@ import (
 	"log/slog"
 	"net"
 	"os"
+	"os/exec"
 	"slices"
 	"syscall"
 
@@ -88,3 +89,17 @@ func runRouteMsgReadLoop(fd int, ch chan<- RouteUpdate) error {
 		}
 	}
 }
+
+func AddRoute(ifName string, to *net.IPNet, _ net.IP) error {
+	if to.IP.To4() == nil { // ipv6
+		return exec.Command("route", "-qn", "add", "-inet6", to.String(), "-iface", ifName).Run()
+	}
+	return exec.Command("route", "-qn", "add", "-inet", to.String(), "-iface", ifName).Run()
+}
+
+func DelRoute(_ string, to *net.IPNet, _ net.IP) error {
+	if to.IP.To4() == nil { // ipv6
+		return exec.Command("route", "-qn", "delete", "-inet6", to.String()).Run()
+	}
+	return exec.Command("route", "-qn", "delete", "-inet", to.String()).Run()
+}

netlink/route_default.go

@@ -5,8 +5,18 @@ package netlink
 import (
 	"context"
 	"errors"
+	"net"
 )
 
 func RouteSubscribe(ctx context.Context, ch chan<- RouteUpdate) error {
 	return errors.ErrUnsupported
 }
+func AddRoute(string, *net.IPNet, net.IP) error {
+	// noop
+	return errors.ErrUnsupported
+}
+
+func DelRoute(string, *net.IPNet, net.IP) error {
+	// noop
+	return errors.ErrUnsupported
+}

netlink/route_linux.go

@@ -3,6 +3,7 @@ package netlink
 import (
 	"context"
 	"log/slog"
+	"net"
 	"slices"
 
 	"github.com/vishvananda/netlink"
@@ -43,3 +44,17 @@ func RouteSubscribe(ctx context.Context, ch chan<- RouteUpdate) error {
 	}()
 	return nil
 }
+
+func AddRoute(_ string, to *net.IPNet, via net.IP) error {
+	return netlink.RouteAdd(&netlink.Route{
+		Dst: to,
+		Gw:  via,
+	})
+}
+
+func DelRoute(_ string, to *net.IPNet, via net.IP) error {
+	return netlink.RouteDel(&netlink.Route{
+		Dst: to,
+		Gw:  via,
+	})
+}

netlink/route_windows.go

@@ -2,7 +2,9 @@ package netlink
 
 import (
 	"context"
+	"fmt"
 	"net"
+	"os/exec"
 
 	"golang.zx2c4.com/wireguard/windows/tunnel/winipcfg"
 )
@@ -26,3 +28,18 @@ func RouteSubscribe(ctx context.Context, ch chan<- RouteUpdate) error {
 	}()
 	return nil
 }
+func AddRoute(ifName string, to *net.IPNet, via net.IP) error {
+	if via.To4() == nil { // ipv6
+		return exec.Command("netsh", "interface", "ipv6", "add", "route", to.String(), ifName, via.String()).Run()
+	}
+	// ipv4
+	addrMask := fmt.Sprintf("%d.%d.%d.%d", to.Mask[0], to.Mask[1], to.Mask[2], to.Mask[3])
+	return exec.Command("route", "add", to.IP.String(), "mask", addrMask, via.String()).Run()
+}
+
+func DelRoute(ifName string, to *net.IPNet, via net.IP) error {
+	if via.To4() == nil { // ipv6
+		return exec.Command("netsh", "interface", "ipv6", "delete", "route", to.String(), ifName, via.String()).Run()
+	}
+	return exec.Command("route", "delete", to.IP.String()).Run()
+}