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new: implemented icmpv6 rogue router advertisement

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This commit is contained in:
Simone Margaritelli 2021-04-04 00:03:11 +02:00
commit a6d5d5d048
2 changed files with 120 additions and 47 deletions
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57
packets/icmp6.go
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@ -5,7 +5,7 @@ import (
"net"
)
func ICMP6RouterAdvertisement(srcHW net.HardwareAddr, srcIP net.IP, dstHW net.HardwareAddr, dstIP net.IP, routerIP net.IP) (error, []byte) {
func ICMP6NeighborAdvertisement(srcHW net.HardwareAddr, srcIP net.IP, dstHW net.HardwareAddr, dstIP net.IP, routerIP net.IP) (error, []byte) {
eth := layers.Ethernet{
SrcMAC: srcHW,
DstMAC: dstHW,
@ -23,7 +23,7 @@ func ICMP6RouterAdvertisement(srcHW net.HardwareAddr, srcIP net.IP, dstHW net.Ha
TypeCode: layers.ICMPv6TypeNeighborAdvertisement << 8,
}
adv := layers.ICMPv6NeighborAdvertisement{
Flags: 0x20 | 0x40, // solicited && override
Flags: 0x20 | 0x40, // solicited && override
TargetAddress: routerIP,
Options: []layers.ICMPv6Option{
{
@ -36,3 +36,56 @@ func ICMP6RouterAdvertisement(srcHW net.HardwareAddr, srcIP net.IP, dstHW net.Ha
return Serialize(&eth, &ip6, &icmp6, &adv)
}
var macIpv6Multicast = net.HardwareAddr([]byte{0x33, 0x33, 0x00, 0x00, 0x00, 0x01})
var ipv6Multicast = net.ParseIP("ff02::1")
func ICMP6RouterAdvertisement(ip net.IP, hw net.HardwareAddr, prefix string, prefixLength uint8) (error, []byte) {
eth := layers.Ethernet{
SrcMAC: hw,
DstMAC: macIpv6Multicast,
EthernetType: layers.EthernetTypeIPv6,
}
ip6 := layers.IPv6{
NextHeader: layers.IPProtocolICMPv6,
TrafficClass: 224,
Version: 6,
HopLimit: 255,
SrcIP: ip,
DstIP: ipv6Multicast,
}
icmp6 := layers.ICMPv6{
TypeCode: layers.ICMPv6TypeRouterAdvertisement << 8,
}
prefixData := []byte{
prefixLength,
0x0c, // flags
0x00, 0x27, 0x8d, 0x00, // valid lifetime (2592000)
0x00, 0x09, 0x3a, 0x80, // preferred lifetime (604800)
0x00, 0x00, 0x00, 0x00, // reserved
}
prefixData = append(prefixData, []byte(net.ParseIP(prefix))...)
adv := layers.ICMPv6RouterAdvertisement{
HopLimit: 255,
Flags: 0x08, // prf
RouterLifetime: 1800,
Options: []layers.ICMPv6Option{
{
Type: layers.ICMPv6OptSourceAddress,
Data: hw,
},
{
Type: layers.ICMPv6OptMTU,
Data: []byte{0x00, 0x00, 0x00, 0x00, 0x05, 0xdc}, // 1500
},
{
Type: layers.ICMPv6OptPrefixInfo,
Data: prefixData,
},
},
}
icmp6.SetNetworkLayerForChecksum(&ip6)
return Serialize(&eth, &ip6, &icmp6, &adv)
}