mirror of
https://github.com/netbirdio/netbird.git
synced 2024-11-29 11:33:48 +01:00
84 lines
2.2 KiB
Go
84 lines
2.2 KiB
Go
//go:build (darwin && !ios) || dragonfly || freebsd || netbsd || openbsd
|
|
|
|
package systemops
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"net/netip"
|
|
"os/exec"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/cenkalti/backoff/v4"
|
|
log "github.com/sirupsen/logrus"
|
|
|
|
"github.com/netbirdio/netbird/client/internal/statemanager"
|
|
nbnet "github.com/netbirdio/netbird/util/net"
|
|
)
|
|
|
|
func (r *SysOps) SetupRouting(initAddresses []net.IP, stateManager *statemanager.Manager) (nbnet.AddHookFunc, nbnet.RemoveHookFunc, error) {
|
|
return r.setupRefCounter(initAddresses, stateManager)
|
|
}
|
|
|
|
func (r *SysOps) CleanupRouting(stateManager *statemanager.Manager) error {
|
|
return r.cleanupRefCounter(stateManager)
|
|
}
|
|
|
|
func (r *SysOps) addToRouteTable(prefix netip.Prefix, nexthop Nexthop) error {
|
|
return r.routeCmd("add", prefix, nexthop)
|
|
}
|
|
|
|
func (r *SysOps) removeFromRouteTable(prefix netip.Prefix, nexthop Nexthop) error {
|
|
return r.routeCmd("delete", prefix, nexthop)
|
|
}
|
|
|
|
func (r *SysOps) routeCmd(action string, prefix netip.Prefix, nexthop Nexthop) error {
|
|
inet := "-inet"
|
|
if prefix.Addr().Is6() {
|
|
inet = "-inet6"
|
|
}
|
|
|
|
network := prefix.String()
|
|
if prefix.IsSingleIP() {
|
|
network = prefix.Addr().String()
|
|
}
|
|
|
|
args := []string{"-n", action, inet, network}
|
|
if nexthop.IP.IsValid() {
|
|
args = append(args, nexthop.IP.Unmap().String())
|
|
} else if nexthop.Intf != nil {
|
|
args = append(args, "-interface", nexthop.Intf.Name)
|
|
}
|
|
|
|
if err := retryRouteCmd(args); err != nil {
|
|
return fmt.Errorf("failed to %s route for %s: %w", action, prefix, err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func retryRouteCmd(args []string) error {
|
|
operation := func() error {
|
|
out, err := exec.Command("route", args...).CombinedOutput()
|
|
log.Tracef("route %s: %s", strings.Join(args, " "), out)
|
|
// https://github.com/golang/go/issues/45736
|
|
if err != nil && strings.Contains(string(out), "sysctl: cannot allocate memory") {
|
|
return err
|
|
} else if err != nil {
|
|
return backoff.Permanent(err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
expBackOff := backoff.NewExponentialBackOff()
|
|
expBackOff.InitialInterval = 50 * time.Millisecond
|
|
expBackOff.MaxInterval = 500 * time.Millisecond
|
|
expBackOff.MaxElapsedTime = 1 * time.Second
|
|
|
|
err := backoff.Retry(operation, expBackOff)
|
|
if err != nil {
|
|
return fmt.Errorf("route cmd retry failed: %w", err)
|
|
}
|
|
return nil
|
|
}
|