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Tolerate EEXIST when adding macOS scoped default routes

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This commit is contained in:
Viktor Liu
2026-04-29 12:13:06 +02:00
parent 7eba5dafd8
commit d359b08099
1 changed files with 14 additions and 2 deletions
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16
client/internal/routemanager/systemops/systemops_darwin.go
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@@ -89,8 +89,16 @@ func (r *SysOps) installScopedDefaultFor(unspec netip.Addr) (bool, error) {
return false, fmt.Errorf("unusable default nexthop for %s (no interface)", unspec)
}
reused := false
if err := r.addScopedDefault(unspec, nexthop); err != nil {
return false, fmt.Errorf("add scoped default on %s: %w", nexthop.Intf.Name, err)
if !errors.Is(err, unix.EEXIST) {
return false, fmt.Errorf("add scoped default on %s: %w", nexthop.Intf.Name, err)
}
// macOS installs its own RTF_IFSCOPE defaults for primary service
// selection on multi-NIC setups, so a route on this ifindex can
// already exist before we try. Binding to it via IP[V6]_BOUND_IF
// still produces the scoped lookup we need.
reused = true
}
af := unix.AF_INET
@@ -102,7 +110,11 @@ func (r *SysOps) installScopedDefaultFor(unspec netip.Addr) (bool, error) {
if nexthop.IP.IsValid() {
via = nexthop.IP.String()
}
log.Infof("installed scoped default route via %s on %s for %s", via, nexthop.Intf.Name, afOf(unspec))
verb := "installed"
if reused {
verb = "reused existing"
}
log.Infof("%s scoped default route via %s on %s for %s", verb, via, nexthop.Intf.Name, afOf(unspec))
return true, nil
}