cmd/ctrld: use network service on darwin

cmd/ctrld/cli.go

@@ -613,5 +613,8 @@ func netIfaceFromName(ifaceName string) (*net.Interface, error) {
 	if iface == nil {
 		return nil, errors.New("interface not found")
 	}
+	if err := patchNetIfaceName(iface); err != nil {
+		return nil, err
+	}
 	return iface, err
 }

cmd/ctrld/net_darwin.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"net"
+	"os/exec"
+	"strings"
+)
+
+func patchNetIfaceName(iface *net.Interface) error {
+	b, err := exec.Command("networksetup", "-listnetworkserviceorder").Output()
+	if err != nil {
+		return err
+	}
+
+	scanner := bufio.NewScanner(bytes.NewReader(b))
+	for scanner.Scan() {
+		line := scanner.Text()
+		if strings.Contains(line, "*") {
+			// Network services is disabled.
+			continue
+		}
+		if !strings.Contains(line, "Device: "+iface.Name) {
+			continue
+		}
+		parts := strings.Split(line, ",")
+		if _, networkServiceName, ok := strings.Cut(parts[0], "(Hardware Port: "); ok {
+			mainLog.Debug().Str("network_service", networkServiceName).Msg("found network service name for interface")
+			iface.Name = networkServiceName
+		}
+	}
+	return nil
+}

cmd/ctrld/net_others.go

@@ -0,0 +1,7 @@
+//go:build !darwin
+
+package main
+
+import "net"
+
+func patchNetIfaceName(iface *net.Interface) error { return nil }