new: implemented dns packet parser

modules/net_sniff_dns.go

@@ -0,0 +1,36 @@
+package modules
+
+import (
+	"fmt"
+
+	"github.com/evilsocket/bettercap-ng/core"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+)
+
+func dnsParser(ip *layers.IPv4, pkt gopacket.Packet, udp *layers.UDP) bool {
+	dns, parsed := pkt.Layer(layers.LayerTypeDNS).(*layers.DNS)
+	if parsed == false {
+		return false
+	}
+
+	if dns.OpCode != layers.DNSOpCodeQuery || len(dns.Answers) == 0 {
+		return false
+	}
+
+	for _, a := range dns.Answers {
+		if a.IP == nil {
+			continue
+		}
+		fmt.Printf("[%s] %s %s > %s : %s is %s\n",
+			vTime(pkt.Metadata().Timestamp),
+			core.W(core.BG_DGRAY+core.FG_WHITE, "dns"),
+			vIP(ip.SrcIP),
+			vIP(ip.DstIP),
+			core.Yellow(string(a.Name)),
+			vIP(a.IP))
+	}
+
+	return true
+}