Refactoring modules

modules/net_sniff/net_sniff_parsers.go

@@ -0,0 +1,67 @@
+package net_sniff
+
+import (
+	"fmt"
+
+	"github.com/bettercap/bettercap/log"
+	"github.com/bettercap/bettercap/packets"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+
+	"github.com/evilsocket/islazy/tui"
+)
+
+func onUNK(ip *layers.IPv4, pkt gopacket.Packet, verbose bool) {
+	if verbose {
+		NewSnifferEvent(
+			pkt.Metadata().Timestamp,
+			pkt.TransportLayer().LayerType().String(),
+			vIP(ip.SrcIP),
+			vIP(ip.DstIP),
+			SniffData{
+				"Size": len(ip.Payload),
+			},
+			"%s %s > %s %s",
+			tui.Wrap(tui.BACKDARKGRAY+tui.FOREWHITE, pkt.TransportLayer().LayerType().String()),
+			vIP(ip.SrcIP),
+			vIP(ip.DstIP),
+			tui.Dim(fmt.Sprintf("%d bytes", len(ip.Payload))),
+		).Push()
+	}
+}
+
+func mainParser(pkt gopacket.Packet, verbose bool) bool {
+	// simple networking sniffing mode?
+	nlayer := pkt.NetworkLayer()
+	if nlayer != nil {
+		if nlayer.LayerType() != layers.LayerTypeIPv4 {
+			log.Debug("Unexpected layer type %s, skipping packet.", nlayer.LayerType())
+			log.Debug("%s", pkt.Dump())
+			return false
+		}
+
+		ip := nlayer.(*layers.IPv4)
+
+		tlayer := pkt.TransportLayer()
+		if tlayer == nil {
+			log.Debug("Missing transport layer skipping packet.")
+			log.Debug("%s", pkt.Dump())
+			return false
+		}
+
+		if tlayer.LayerType() == layers.LayerTypeTCP {
+			onTCP(ip, pkt, verbose)
+		} else if tlayer.LayerType() == layers.LayerTypeUDP {
+			onUDP(ip, pkt, verbose)
+		} else {
+			onUNK(ip, pkt, verbose)
+		}
+		return true
+	} else if ok, radiotap, dot11 := packets.Dot11Parse(pkt); ok {
+		// are we sniffing in monitor mode?
+		onDOT11(radiotap, dot11, pkt, verbose)
+		return true
+	}
+	return false
+}