misc: small fix or general refactoring i did not bother commenting

network/net_gateway_android.go

@@ -0,0 +1,32 @@
+package net
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"regexp"
+	"runtime"
+	"strconv"
+	"strings"
+
+	"github.com/bettercap/bettercap/core"
+)
+
+func FindGateway(iface *Endpoint) (*Endpoint, error) {
+	output, err = core.Exec("getprop", []string{"net.dns1"})
+	if err != nil {
+		return nil, err
+	}
+
+	gw := core.Trim(output)
+	if IPv4Validator.MatchString(gw) {
+		// we have the address, now we need its mac
+		mac, err := ArpLookup(iface.Name(), gw, false)
+		if err != nil {
+			return nil, err
+		}
+		return NewEndpoint(gateway, mac), nil
+	}
+
+	return nil, ErrNoGateway
+}