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

network/net_gateway.go

@@ -0,0 +1,37 @@
+// +build !android
+
+package network
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/bettercap/bettercap/core"
+)
+
+func FindGateway(iface *Endpoint) (*Endpoint, error) {
+	output, err := core.Exec(IPv4RouteCmd, IPv4RouteCmdOpts)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, line := range strings.Split(output, "\n") {
+		m := IPv4RouteParser.FindStringSubmatch(line)
+		if len(m) == IPv4RouteTokens {
+			return IPv4RouteIsGateway(iface.Name(), m, func(gateway string) (*Endpoint, error) {
+				if gateway == iface.IpAddress {
+					return iface, nil
+				} else {
+					// we have the address, now we need its mac
+					mac, err := ArpLookup(iface.Name(), gateway, false)
+					if err != nil {
+						fmt.Printf("%s\n", err)
+					}
+					return NewEndpoint(gateway, mac), nil
+				}
+			})
+		}
+	}
+
+	return nil, ErrNoGateway
+}