Hello everyone i am new here so please be kind.
I have been using scapy lately in order to send and recieve ipv6 packets to selected ipv6 enabled servers. The gist of the code is here:
text = line[:-1]
#destination=getIPv6Addr(line[:-1])
destination="2607:f1c0:1000:60e0:7992:97f7:61b2:2814"
source="2001:630:d0:f105:5cfe:e988:421a:a7b7"
syn = IPv6(dst=destination,src=source) / TCP(sport=555,dport=80,flags="S")#flag S is syn packet
syn.show()
syn_ack = sr1(syn,timeout=11)
When i execute the code hoever this is what i get:
Begin emission:
Finished to send 1 packets.
.................WARNING: No route found for IPv6 destination :: (no default route?)
WARNING: No route found for IPv6 destination 2607:f1c0:1000:60e0:7992:97f7:61b2:2814 (no default route?)
............................................................................................................
Received 1322 packets, got 0 answers, remaining 1 packets
From what i understand, the packet has been sent nevertheless a response is never gotten(0 answers). This made me think of using wireshark to sniff the packet.
Upon using it with filter:
ip6 net 2607:f1c0:1000:60e0:7992:97f7:61b2:2814
I realised the packet was never sent at the first place! Does anyone know why this is happening or what is hapening here?
Regards Martinos
EDIT:
On closer inspection from comments, i realized that the route list SHOULD not be empty. There are no routes to send the packet. I am not sure how to add them! Please help here is what i did:
i tried to get all the interfaces from my device. Here is what i got back:
{'flags': 33, 'link_addr': b0:90:20:52:41:53, 'type': 6, 'name': 'eth0', 'mtu': 1500L}
{'flags': 33, 'link_addr': b0:90:20:52:41:53, 'type': 6, 'name': 'eth1', 'mtu': 1500L}
{'flags': 33, 'link_addr': 00:50:56:a0:1e:df, 'type': 6, 'name': 'eth2', 'mtu': 1500L}
{'flags': 33, 'link_addr': 00:50:56:a0:1e:df, 'type': 6, 'name': 'eth3', 'mtu': 1500L}
{'flags': 33, 'link_addr': b0:90:20:52:41:53, 'type': 6, 'name': 'eth4', 'mtu': 1500L}
{'flags': 33, 'link_addr': b0:90:20:52:41:53, 'type': 6, 'name': 'eth5', 'mtu': 1500L}
{'flags': 32, 'link_addr': 00:50:56:a0:00:6c, 'type': 6, 'name': 'eth6', 'mtu': 0L}
{'flags': 32, 'link_addr': 00:50:56:a0:01:0e, 'type': 6, 'name': 'eth7', 'mtu': 0L}
{'flags': 32, 'link_addr': 00:50:56:a0:6e:61, 'type': 6, 'name': 'eth8', 'mtu': 0L}
{'addr': 152.78.61.39/24, 'mtu': 1500L, 'flags': 33, 'link_addr': 00:50:56:a0:1e:df, 'type': 6, 'name': 'eth9'}
{'flags': 33, 'link_addr': b0:90:20:52:41:53, 'type': 6, 'name': 'eth10', 'mtu': 1500L}
{'flags': 33, 'link_addr': b0:90:20:52:41:53, 'type': 6, 'name': 'eth11', 'mtu': 1500L}
{'flags': 33, 'type': 23, 'name': 'ppp0', 'mtu': 1494L}
{'flags': 33, 'link_addr': 20:41:53:59:4e:ff, 'type': 23, 'name': 'ppp1', 'mtu': 3256L}
{'addr': 127.0.0.1/8, 'flags': 3, 'type': 24, 'name': 'lo0', 'mtu': 1500L}
{'flags': 33, 'type': 131, 'name': 'tun0', 'mtu': 4091L}
{'flags': 32, 'type': 131, 'name': 'tun1', 'mtu': 1480L}
{'flags': 33, 'type': 131, 'name': 'tun2', 'mtu': 1460L}
{'flags': 33, 'type': 131, 'name': 'tun3', 'mtu': 1464L}
{'flags': 32, 'type': 131, 'name': 'tun4', 'mtu': 1280L}
{'flags': 32, 'type': 131, 'name': 'tun5', 'mtu': 1280L}
{'flags': 33, 'type': 131, 'name': 'tun6', 'mtu': 1472L}
{'flags': 32, 'type': 131, 'name': 'tun7', 'mtu': 1280L}
As you can see, nowhere in there there is an ipv6 address. How am i supposed to send ipv6 packets if no ipv6 address is listed? in extend, here is the ipconfig from cmd:
Ethernet adapter Local Area Connection 4:
Connection-specific DNS Suffix . : ecs.soton.ac.uk
IPv6 Address. . . . . . . . . . . : 2001:630:d0:f105:5cfe:e988:421a:a7b7
Temporary IPv6 Address. . . . . . : 2001:630:d0:f105:e8bc:7c26:9a40:31b8
Link-local IPv6 Address . . . . . : fe80::5cfe:e988:421a:a7b7%17
IPv4 Address. . . . . . . . . . . : 152.78.61.39
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : fe80::210:18ff:fee5:5bfa%17
152.78.61.254
Tunnel adapter 6TO4 Adapter:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Tunnel adapter Teredo Tunneling Pseudo-Interface:
Connection-specific DNS Suffix . :
IPv6 Address. . . . . . . . . . . : 2001:0:5ef5:79fd:142e:398d:67b1:c2d8
Link-local IPv6 Address . . . . . : fe80::142e:398d:67b1:c2d8%13
Default Gateway . . . . . . . . . :
Tunnel adapter isatap.ecs.soton.ac.uk:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : ecs.soton.ac.uk
This is run on a VM but i dont think it matters.
PLEASE someone help me this is very important! how can i configure scapy in order to understand how to send ipv6 packets. and why do i see no ipv6 addresses in the list above of interfaces?
The ethernet adapter indeed has both an IPv6 address and a default gateway. You could
Try to
ping -6 ipv6.google.comto see if there is any IPv6 connectivity. I think there must be, since I can ping your IPv6 address just fine, unless it has been reassigned to somebody else now.Inspect the routing tables to see there are no superfluous routes In particular, the Teredo interface might be causing trouble. Turn it off. (netsh interface teredo set state disabled)
Teredo: http://tools.ietf.org/html/rfc4380 http://en.wikipedia.org/wiki/Teredo_tunneling
I do not know how to configure IPv6 routing and interfaces using scapy.
I made this an answer, since there is not enough room in the comments. I do still suggest you ask on superuser. I can not sufficiently help you, since I am not familiar with either "JANET" or Windows networking configuration.
I observed that in "layers/inet6.py" there is function call to getmacbyip6, in which they are trying to get the interface info based on the scapy routing table.
iff,a,nh = conf.route6.route(ip6, dev=conf.iface6)
As conf.iface6 is set to "lo" by default it always return loopback interface.
iff,a,nh = conf.route6.route(ip6)
I changed the above statement as shown below then I was able to see the packets going out from the corresponding interface.
Example:-
[root@purple-perf-tester scapy]# ifconfig eth1
eth1: flags=323<UP,BROADCAST,RUNNING,PROMISC> mtu 1500
inet 11.0.0.5 netmask 255.255.255.0 broadcast 0.0.0.0
inet6 2001::6 prefixlen 64 scopeid 0x0<global>
inet6 fe80::f816:3eff:fe2b:cc67 prefixlen 64 scopeid 0x20<link>
ether fa:16:3e:2b:cc:67 txqueuelen 1000 (Ethernet)
RX packets 6107709 bytes 1239209940 (1.1 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 12093723 bytes 4161092991 (3.8 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@purple-perf-tester scapy]# ip -6 route show dev eth1
2001::7 via fe80::f816:3eff:fed1:43de metric 1024
2001::/64 proto kernel metric 256
fe80::/64 proto kernel metric 256
[root@purple-perf-tester scapy]# scapy
INFO: Can't import python gnuplot wrapper . Won't be able to plot.
INFO: Can't import PyX. Won't be able to use psdump() or pdfdump().
WARNING: No route found for IPv6 destination :: (no default route?)
Welcome to Scapy (2.3.1)
>>>
>>> conf.route6
Destination Next Hop iface src candidates
::1/128 :: lo ::1
2001::7/128 fe80::f816:3eff:fed1:43de eth1 2001::6
2001::/64 :: eth1 2001::6
2002::/64 :: eth2 2002::6
fe80::/64 :: eth0 fe80::f816:3eff:fe7c:d9fe
fe80::/64 :: eth1 fe80::f816:3eff:fe2b:cc67
fe80::/64 :: eth2 fe80::f816:3eff:fe1a:a62e
::1/128 :: lo ::1
2001::6/128 :: lo ::1
2002::6/128 :: lo ::1
fe80::f816:3eff:fe1a:a62e/128 :: lo ::1
fe80::f816:3eff:fe2b:cc67/128 :: lo ::1
fe80::f816:3eff:fe7c:d9fe/128 :: lo ::1
>>> iff,a,nh = conf.route6.route("2001::7", dev=conf.iface6)
WARNING: No route found for IPv6 destination 2001::7 (no default route?)
>>> print iff
lo
>>> iff,a,nh = conf.route6.route("2001::7")
>>> print iff
eth1
conf.iface6 should be set for sending IPv6 packets.
来源：https://stackoverflow.com/questions/18153044/scapy-fails-to-send-ipv6-packets