1
0
mirror of https://github.com/netbirdio/netbird.git synced 2025-03-04 18:01:13 +01:00
netbird/client/internal/networkmonitor/monitor_windows.go
Viktor Liu 80b0db80bc
[client] Replace windows network monitor implementation ()
This new one uses functions from netioapi.h to monitor route changes.
This change ensures that we include routes that point to virtual
interfaces, such as vEthernet created by the Hyper-V Virtual Switch.
2024-08-20 19:13:16 +02:00

76 lines
2.1 KiB
Go

package networkmonitor
import (
"context"
"fmt"
"strings"
log "github.com/sirupsen/logrus"
"github.com/netbirdio/netbird/client/internal/routemanager/systemops"
)
func checkChange(ctx context.Context, nexthopv4, nexthopv6 systemops.Nexthop, callback func()) error {
routeMonitor, err := systemops.NewRouteMonitor(ctx)
if err != nil {
return fmt.Errorf("failed to create route monitor: %w", err)
}
defer func() {
if err := routeMonitor.Stop(); err != nil {
log.Errorf("Network monitor: failed to stop route monitor: %v", err)
}
}()
for {
select {
case <-ctx.Done():
return ErrStopped
case route := <-routeMonitor.RouteUpdates():
if route.Destination.Bits() != 0 {
continue
}
if routeChanged(route, nexthopv4, nexthopv6, callback) {
break
}
}
}
}
func routeChanged(route systemops.RouteUpdate, nexthopv4, nexthopv6 systemops.Nexthop, callback func()) bool {
intf := "<nil>"
if route.Interface != nil {
intf = route.Interface.Name
if isSoftInterface(intf) {
log.Debugf("Network monitor: ignoring default route change for soft interface %s", intf)
return false
}
}
switch route.Type {
case systemops.RouteModified:
// TODO: get routing table to figure out if our route is affected for modified routes
log.Infof("Network monitor: default route changed: via %s, interface %s", route.NextHop, intf)
go callback()
return true
case systemops.RouteAdded:
if route.NextHop.Is4() && route.NextHop != nexthopv4.IP || route.NextHop.Is6() && route.NextHop != nexthopv6.IP {
log.Infof("Network monitor: default route added: via %s, interface %s", route.NextHop, intf)
go callback()
return true
}
case systemops.RouteDeleted:
if nexthopv4.Intf != nil && route.NextHop == nexthopv4.IP || nexthopv6.Intf != nil && route.NextHop == nexthopv6.IP {
log.Infof("Network monitor: default route removed: via %s, interface %s", route.NextHop, intf)
go callback()
return true
}
}
return false
}
func isSoftInterface(name string) bool {
return strings.Contains(strings.ToLower(name), "isatap") || strings.Contains(strings.ToLower(name), "teredo")
}