Bind layer PPP with IPv6 (fixes #5143)

Author: p-l-

scapy/layers/ppp.py

@@ -13,6 +13,7 @@
 from scapy.packet import *
 from scapy.layers.l2 import *
 from scapy.layers.inet import *
+from scapy.layers.inet6 import IPv6
 from scapy.fields import *
 
 class PPPoE(Packet):
@@ -340,7 +341,8 @@ class PPP_ECP(Packet):
 bind_layers( CookedLinux,   PPPoE,         proto=0x8864)
 bind_layers( PPPoE,         PPP,           code=0)
 bind_layers( HDLC,          PPP,           )
-bind_layers( PPP,           IP,            proto=33)
+bind_layers( PPP,           IP,            proto=0x0021)
+bind_layers( PPP,           IPv6,          proto=0x0057)
 bind_layers( PPP,           PPP_IPCP,      proto=0x8021)
 bind_layers( PPP,           PPP_ECP,       proto=0x8053)
 bind_layers( Ether,         PPP_IPCP,      type=0x8021)