Feature/exit nodes - Windows and macOS support (#1726)

client/internal/routemanager/systemops_nonandroid.go

@@ -1,148 +0,0 @@
-//go:build !android
-
-//nolint:unused
-package routemanager
-
-import (
-	"errors"
-	"fmt"
-	"net"
-	"net/netip"
-	"os/exec"
-	"runtime"
-
-	"github.com/libp2p/go-netroute"
-	log "github.com/sirupsen/logrus"
-)
-
-var errRouteNotFound = fmt.Errorf("route not found")
-
-func genericAddRouteForCurrentDefaultGateway(prefix netip.Prefix) error {
-	defaultGateway, err := getExistingRIBRouteGateway(defaultv4)
-	if err != nil && !errors.Is(err, errRouteNotFound) {
-		return fmt.Errorf("get existing route gateway: %s", err)
-	}
-
-	addr := netip.MustParseAddr(defaultGateway.String())
-
-	if !prefix.Contains(addr) {
-		log.Debugf("Skipping adding a new route for gateway %s because it is not in the network %s", addr, prefix)
-		return nil
-	}
-
-	gatewayPrefix := netip.PrefixFrom(addr, 32)
-
-	ok, err := existsInRouteTable(gatewayPrefix)
-	if err != nil {
-		return fmt.Errorf("unable to check if there is an existing route for gateway %s. error: %s", gatewayPrefix, err)
-	}
-
-	if ok {
-		log.Debugf("Skipping adding a new route for gateway %s because it already exists", gatewayPrefix)
-		return nil
-	}
-
-	gatewayHop, err := getExistingRIBRouteGateway(gatewayPrefix)
-	if err != nil && !errors.Is(err, errRouteNotFound) {
-		return fmt.Errorf("unable to get the next hop for the default gateway address. error: %s", err)
-	}
-	log.Debugf("Adding a new route for gateway %s with next hop %s", gatewayPrefix, gatewayHop)
-	return genericAddToRouteTable(gatewayPrefix, gatewayHop.String(), "")
-}
-
-func genericAddToRouteTableIfNoExists(prefix netip.Prefix, addr string, intf string) error {
-	ok, err := existsInRouteTable(prefix)
-	if err != nil {
-		return fmt.Errorf("exists in route table: %w", err)
-	}
-	if ok {
-		log.Warnf("Skipping adding a new route for network %s because it already exists", prefix)
-		return nil
-	}
-
-	ok, err = isSubRange(prefix)
-	if err != nil {
-		return fmt.Errorf("sub range: %w", err)
-	}
-
-	if ok {
-		err := genericAddRouteForCurrentDefaultGateway(prefix)
-		if err != nil {
-			log.Warnf("Unable to add route for current default gateway route. Will proceed without it. error: %s", err)
-		}
-	}
-
-	return genericAddToRouteTable(prefix, addr, intf)
-}
-
-func genericRemoveFromRouteTableIfNonSystem(prefix netip.Prefix, addr string, intf string) error {
-	return genericRemoveFromRouteTable(prefix, addr, intf)
-}
-
-func genericAddToRouteTable(prefix netip.Prefix, addr, _ string) error {
-	cmd := exec.Command("route", "add", prefix.String(), addr)
-	out, err := cmd.Output()
-	if err != nil {
-		return fmt.Errorf("add route: %w", err)
-	}
-	log.Debugf(string(out))
-	return nil
-}
-
-func genericRemoveFromRouteTable(prefix netip.Prefix, addr, _ string) error {
-	args := []string{"delete", prefix.String()}
-	if runtime.GOOS == "darwin" {
-		args = append(args, addr)
-	}
-	cmd := exec.Command("route", args...)
-	out, err := cmd.Output()
-	if err != nil {
-		return fmt.Errorf("remove route: %w", err)
-	}
-	log.Debugf(string(out))
-	return nil
-}
-
-func getExistingRIBRouteGateway(prefix netip.Prefix) (net.IP, error) {
-	r, err := netroute.New()
-	if err != nil {
-		return nil, fmt.Errorf("new netroute: %w", err)
-	}
-	_, gateway, preferredSrc, err := r.Route(prefix.Addr().AsSlice())
-	if err != nil {
-		log.Errorf("Getting routes returned an error: %v", err)
-		return nil, errRouteNotFound
-	}
-
-	if gateway == nil {
-		return preferredSrc, nil
-	}
-
-	return gateway, nil
-}
-
-func existsInRouteTable(prefix netip.Prefix) (bool, error) {
-	routes, err := getRoutesFromTable()
-	if err != nil {
-		return false, fmt.Errorf("get routes from table: %w", err)
-	}
-	for _, tableRoute := range routes {
-		if tableRoute == prefix {
-			return true, nil
-		}
-	}
-	return false, nil
-}
-
-func isSubRange(prefix netip.Prefix) (bool, error) {
-	routes, err := getRoutesFromTable()
-	if err != nil {
-		return false, fmt.Errorf("get routes from table: %w", err)
-	}
-	for _, tableRoute := range routes {
-		if isPrefixSupported(tableRoute) && tableRoute.Contains(prefix.Addr()) && tableRoute.Bits() < prefix.Bits() {
-			return true, nil
-		}
-	}
-	return false, nil
-}