def main():
intf = sys.argv[1]
ipv6_src = sys.argv[2]
ipv6_dst = sys.argv[3]
ipv6_main = sp.IPv6(dst=ipv6_dst, src=ipv6_src)
padding = 8
fid = random.randint(0, 100000)
frag_0 = sp.IPv6ExtHdrFragment(id=fid, nh=UDP_PROTO, m=1, offset=0)
frag_1 = sp.IPv6ExtHdrFragment(id=fid,
nh=UDP_PROTO,
m=0,
offset=padding / 8)
pkt1_opts = sp.AH(nh=AH_PROTO, payloadlen=200) \
/ sp.Raw('XXXX' * 199) \
/ sp.AH(nh=FRAG_PROTO, payloadlen=1) \
/ frag_1
pkt0 = sp.Ether() / ipv6_main / frag_0 / sp.Raw('A' * padding)
pkt1 = sp.Ether() / ipv6_main / pkt1_opts / sp.Raw('B' * padding)
sp.sendp(pkt0, iface=intf, verbose=False)
sp.sendp(pkt1, iface=intf, verbose=False)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
# Start sniffing on recvif
sniffer = Sniffer(args, check_icmp6_error)
########################################################################
#
# A single start fragment with zero length IPv6 header (jumbo).
# Make sure we do hit the Fragment case, which is tricky as the
# jumbogram needs to be > 64k.
#
# A: Jumbo-Fragment not allowed.
# R: ICMPv6 param problem.
#
#data = "6" * (65536 - 2 - 6 - 8 - 8)
data = "6" * 65512
ip6f01 = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0], plen=0) / \
sp.IPv6ExtHdrHopByHop(options=sp.Jumbo(jumboplen=65536)) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=6) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug:
ip6f01.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
# We should only need to sleep 0.10 but it seems scapy
# takes time for this one.
sleep(75)
sniffer.setEnd()
sniffer.join()
if not sniffer.foundCorrectPacket:
sys.exit(1)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
########################################################################
#
# Send a sample of pseudo-random fragments into the system in order
# to test vnet teardown.
#
# A: Cleaned up and freed
# R: No panic (ignoring everything else)
#
random.seed()
packets = []
for i in range(0, 127):
fid = random.randint(0, 0xffff)
foffset = random.randint(0, 0xffff)
fm = random.randint(0, 1)
fsrc = sp.RandIP6()
ip6f01 = sp.Ether() / \
sp.IPv6(src=fsrc, dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=foffset, m=fm, id=fid) / \
sp.UDP(dport=3456, sport=6543)
if args.debug:
ip6f01.display()
packets.append(ip6f01)
for p in packets:
sp.sendp(p, iface=args.sendif[0], verbose=False)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
# Start sniffing on recvif
sniffer = Sniffer(args, check_icmp6_error)
########################################################################
#
# A single start fragment with payload.
#
# A: Waiting for more data.
# R: Timeout / Expiry.
#
data = "6" * 1280
ip6f01 = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=3) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug:
ip6f01.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
# Wait for ICMPv6 error generation on timeout.
sleep(75)
sniffer.setEnd()
sniffer.join()
if not sniffer.foundCorrectPacket:
sys.exit(1)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
# Start sniffing on recvif
sniffer = Sniffer(args, check_icmp6_error)
########################################################################
#
# Atomic fragment.
#
# A: Nothing listening on UDP port.
# R: ICMPv6 dst unreach, unreach port.
#
ip6f01 = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0, m=0, id=3) / \
sp.UDP(dport=3456, sport=6543)
if args.debug:
ip6f01.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sleep(0.10)
sniffer.setEnd()
sniffer.join()
if not sniffer.foundCorrectPacket:
sys.exit(1)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
# Start sniffing on recvif
sniffer = Sniffer(args, check_icmp6_error)
########################################################################
#
# 0-byte first fragment.
#
# A: 0-byte fragment payload not allowed. Discarded.
# R: ICMPv6 param prob, paramprob header.
#
ip6f01 = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=4)
if args.debug:
ip6f01.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sleep(0.10)
sniffer.setEnd()
sniffer.join()
if not sniffer.foundCorrectPacket:
sys.exit(1)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
########################################################################
#
# Send a sample of sequeneced ID fragments into the system in order
# to test bucket distribution.
#
# A: No overflow at V_ip6_maxfragsperpacket == 64.
# R: Stats only, timeout and no ICMPv6 (all ignored).
#
packets = []
data = "66666666"
for i in range(0, 127):
ip6f01 = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=1, m=1, id=i) / \
data
if args.debug:
ip6f01.display()
packets.append(ip6f01)
for p in packets:
sp.sendp(p, iface=args.sendif[0], verbose=False)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
########################################################################
#
# Sysctl set to accept (no|maximum 10) fragments.
#
# A: Discarded.
# R: Silence (statistics only) or ICMPv6 timeout expiry.
#
data = "6" * 1280
bfid = 0x5001
for i in range(20):
fid = bfid + i
ip6f01 = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=fid) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug:
ip6f01.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
# Wait for possible expiry to happen.
sleep(75)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
########################################################################
#
# A single last fragment.
#
# A: Waiting for more data.
# R: Timeout / Expiry.
#
ip6f01 = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=321, m=0, id=8) / \
sp.UDP(dport=3456, sport=6543)
if args.debug:
ip6f01.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
# Wait for expiration to happen. We will not see an ICMPv6 as there
# is no frag with offset=0.
sleep(75)
sys.exit(0)
def main():
parser = argparse.ArgumentParser("frag6.py",
description="IPv6 fragementation test tool")
parser.add_argument('--sendif', nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif', nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src', nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to', nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False, action='store_true',
help='Enable test debugging')
args = parser.parse_args()
########################################################################
#
# Send multiple fragments, with an exact overlap in a middle one,
# not finishing the full packet (and ignoring the content anyway).
#
# A: Reassembly failure.
# R: dup dropped silently / Timeout (not waiting for).
#
data = "6" * 8
ip6f01 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=14) / \
sp.UDP(dport=3456, sport=6543) / \
data
ip6f02 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0x1000, m=0, id=14) / \
sp.UDP(dport=3456, sport=6543) / \
data
ip6f03 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=16, m=1, id=14) / \
sp.UDP(dport=3456, sport=6543) / \
data
ip6f04 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=16, m=1, id=14) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug :
ip6f01.display()
ip6f02.display()
ip6f03.display()
ip6f04.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sp.sendp(ip6f02, iface=args.sendif[0], verbose=False)
sp.sendp(ip6f03, iface=args.sendif[0], verbose=False)
sp.sendp(ip6f04, iface=args.sendif[0], verbose=False)
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ##
#
# Send multiple fragments, with a partial overlap on the first one
# not finishing the full packet (and ignoring the content anyway).
# The second packet needs to be the first one in the fragment chain
# in order to trigger the 2nd case to test.
#
# A: Reassembly failure.
# R: dup dropped silently / Timeout (not waiting for).
#
data = "6" * 8
ip6f01 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=10, m=1, id=0x1401) / \
sp.UDP(dport=3456, sport=6543) / \
data
ip6f02 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=9, m=0, id=0x1401) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug :
ip6f01.display()
ip6f02.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sp.sendp(ip6f02, iface=args.sendif[0], verbose=False)
# Wait for expiry.
sleep(75)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
########################################################################
#
# Two fragments with different ECN (Traffic Clas) bits to trigger
# error cases.
#
# A: Reassembly failure.
# R: ip6f02 dropped / Timeout (not waiting for).
#
data = "6" * 8
# IPTOS_ECN_NOTECT
ip6f01 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0], tc=0x00) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=13) / \
sp.UDP(dport=3456, sport=6543) / \
data
# IPTOS_ECN_CE
ip6f02 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0], tc=0x03) / \
sp.IPv6ExtHdrFragment(offset=16, m=0, id=13) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug:
ip6f01.display()
ip6f02.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sp.sendp(ip6f02, iface=args.sendif[0], verbose=False)
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ##
#
# Two fragments with different ECN (Traffic Clas) bits to trigger
# error cases.
#
# A: Reassembly failure.
# R: ip6f02 dropped / Timeout (not waiting for).
#
# IPTOS_ECN_ECT1
ip6f01 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0], tc=0x01) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=0x1301) / \
sp.UDP(dport=3456, sport=6543) / \
data
# IPTOS_ECN_NOTECT
ip6f02 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0], tc=0x00) / \
sp.IPv6ExtHdrFragment(offset=16, m=0, id=0x1301) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug:
ip6f01.display()
ip6f02.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sp.sendp(ip6f02, iface=args.sendif[0], verbose=False)
# Wait for expiry.
sleep(75)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
# Start sniffing on recvif
sniffer = Sniffer(args, check_icmp6_error)
########################################################################
#
# A single fragmented packet with upper layer data in multiple segments
# to pass fragmentation.
# We need to do a bit of a dance to get the UDP checksum right.
#
# A: 1 reassembled packet
# R: Statistics and ICMPv6 error (non-fragmentation) as no port open.
#
data = "6" * 1280
dataall = data * 30
ip6f01 = \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.UDP(dport=3456, sport=6543) / \
dataall
ip6fd = sp.IPv6(sp.raw(ip6f01))
ip6f01 = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=16) / \
sp.UDP(dport=3456, sport=6543, len=ip6fd.len, chksum=ip6fd.chksum) / \
data
if args.debug:
ip6f01.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
foffset = (int)(1288 / 8)
mbit = 1
for i in range(1, 30):
if i is 29:
mbit = 0
ip6f0n = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=foffset, m=mbit, id=16, nh=socket.IPPROTO_UDP) / \
data
if args.debug:
ip6f0n.display()
sp.sendp(ip6f0n, iface=args.sendif[0], verbose=False)
foffset += (int)(1280 / 8)
sleep(0.10)
sniffer.setEnd()
sniffer.join()
if not sniffer.foundCorrectPacket:
sys.exit(1)
sys.exit(0)
def main():
parser = argparse.ArgumentParser("frag6.py",
description="IPv6 fragementation test tool")
parser.add_argument('--sendif', nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif', nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src', nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to', nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False, action='store_true',
help='Enable test debugging')
args = parser.parse_args()
# Start sniffing on recvif
sniffer = Sniffer(args, check_icmp6_error)
sniffer2 = Sniffer(args, check_icmp6_error_2)
########################################################################
#
# Two fragments with payload and offset set to add up to >64k.
#
# Make a first fragment arrive and a second to explode everything.
#
# A: Reassembly failure.
# R: ICMPv6 param prob, param header.
# R: ICMPv6 timeout (1st frag, off=0)
#
data = "6" * 1280
ip6f01 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=7) / \
sp.UDP(dport=3456, sport=6543) / \
data
ip6f02 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0x1fff, m=1, id=7) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug :
ip6f01.display()
ip6f02.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sp.sendp(ip6f02, iface=args.sendif[0], verbose=False)
sleep(1.00)
sniffer.setEnd()
sniffer.join()
if not sniffer.foundCorrectPacket:
sys.exit(1)
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ##
#
# A fragment with payload and offset set to add up to >64k.
#
# Try again with the first packet to make things explode.
#
# A: Reassembly failure.
# R: ICMPv6 param prob, param header.
#
# Start sniffing on recvif
sniffer = Sniffer(args, check_icmp6_error)
ip6f01 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0x1fff, m=1, id=0x7001) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug :
ip6f01.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sleep(0.10)
sniffer.setEnd()
sniffer.join()
if not sniffer.foundCorrectPacket:
sys.exit(1)
# Wait for expiry from first test run.
sleep(75)
sniffer2.setEnd()
sniffer2.join()
if not sniffer2.foundCorrectPacket:
sys.exit(1)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
########################################################################
#
# Sysctl set to accept maximum 3 segments on a fragmented packet.
# The 4th packet will flush the entire q6.
#
# A: 4 Discarded.
# R: Silence (statistics only) no ICMPv6 as we skip the off=0 segment.
#
data = "66666666"
for i in range(4):
foffset = 16 + (i * (0x100 + (int)(16 / 8)))
ip6f01 = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=foffset, m=1, id=15) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug:
ip6f01.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ##
#
# Sysctl set to accept maximum 3 segments on a fragmented packet.
# The 4th packet will flush the entire q6.
# This time we play proper offset/length games on the packets in order
# to trigger the 2nd test case, with the last packet still having m=1.
#
# A: 4 Discarded.
# R: ICMPv6 timeout expired.
#
data = "66666666"
for i in range(4):
foffset = (i * (int)(16 / 8))
ip6f01 = sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=foffset, m=1, id=0x1501) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug:
ip6f01.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sys.exit(0)
def main():
parser = argparse.ArgumentParser("frag6.py",
description="IPv6 fragementation test tool")
parser.add_argument('--sendif', nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif', nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src', nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to', nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False, action='store_true',
help='Enable test debugging')
args = parser.parse_args()
# Start sniffing on recvif
sniffer = Sniffer(args, check_icmp6_error)
########################################################################
#
# Send a proper first fragment (off=0) and a second fragment which
# just fits the 64k. The re-send the first fragment with an extra
# unfragmentable part making the 64k to exceed the limit.
# This is to make sure we don't allow to update meta-data for a
# 1st fragmented packet should a second arrive but given the
# fragmentable part is an exact duplicate only that fragment
# will be silently discarded.
#
# A: Reassembly failure, timeout after
# R: ICMPv6 time exceeded / statistics for the duplicate
#
data = "6" * 8
ip6f00 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=20) / \
sp.UDP(dport=3456, sport=6543) / \
data
data = "6" * 15
ip6f01 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0x1ffc, m=0, id=20) / \
sp.UDP(dport=3456, sport=6543) / \
data
data = "6" * 8
ip6f02 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrDestOpt(options = \
sp.PadN(optdata="\x00\x00\x00\x00\x00\x00")) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=20) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug :
ip6f00.display()
ip6f01.display()
ip6f02.display()
sp.sendp(ip6f00, iface=args.sendif[0], verbose=False)
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sp.sendp(ip6f02, iface=args.sendif[0], verbose=False)
sleep(75)
sniffer.setEnd()
sniffer.join()
if not sniffer.foundCorrectPacket:
sys.exit(1)
sys.exit(0)
def main():
parser = argparse.ArgumentParser(
"frag6.py", description="IPv6 fragementation test tool")
parser.add_argument(
'--sendif',
nargs=1,
required=True,
help='The interface through which the packet will be sent')
parser.add_argument('--recvif',
nargs=1,
required=True,
help='The interface on which to check for the packet')
parser.add_argument('--src',
nargs=1,
required=True,
help='The source IP address')
parser.add_argument('--to',
nargs=1,
required=True,
help='The destination IP address')
parser.add_argument('--debug',
required=False,
action='store_true',
help='Enable test debugging')
args = parser.parse_args()
# Start sniffing on recvif
sniffer = Sniffer(args, check_icmp6_error)
sniffer2 = Sniffer(args, check_icmp6_error_2)
########################################################################
#
# A fragment with payload and offset set to add up to >64k when
# another frag with offset=0 arrives and has an unfrag part.
# This is us checking for all fragments queued already when the
# one with off=0 arrives. Note: unless the off=0 has its own problem
# it will be queued and off!=0 ones might be expunged with param prob.
#
# A: Reassembly failure, timeout after
# R: ICMPv6 param prob, param header (1st frag)
# R: ICMPv6 time exceeded (2nd frag, as off=0)
#
data = "6" * 15
ip6f01 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrFragment(offset=0x1ffc, m=0, id=8) / \
sp.UDP(dport=3456, sport=6543) / \
data
data = "6" * 8
ip6f02 = \
sp.Ether() / \
sp.IPv6(src=args.src[0], dst=args.to[0]) / \
sp.IPv6ExtHdrDestOpt(options = \
sp.PadN(optdata="\x00\x00\x00\x00\x00\x00")) / \
sp.IPv6ExtHdrFragment(offset=0, m=1, id=8) / \
sp.UDP(dport=3456, sport=6543) / \
data
if args.debug:
ip6f01.display()
ip6f02.display()
sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
sp.sendp(ip6f02, iface=args.sendif[0], verbose=False)
sleep(1.00)
sniffer.setEnd()
sniffer.join()
if not sniffer.foundCorrectPacket:
sys.exit(1)
sleep(75)
sniffer2.setEnd()
sniffer2.join()
if not sniffer2.foundCorrectPacket:
sys.exit(1)
sys.exit(0)
def getExtHdrs(args):
ext = None
# XXX-TODO Try to put them in an order which could make sense
# in real life packets and according to the RFCs.
if args.hbh:
hbh = sp.IPv6ExtHdrHopByHop(options = \
sp.PadN(optdata="\x00\x00\x00\x00\x00\x00"))
ext = addExt(ext, hbh)
if args.rh:
rh = sp.IPv6ExtHdrRouting(type=0)
ext = addExt(ext, rh)
if args.frag6:
frag6 = sp.IPv6ExtHdrFragment(offset=0, m=0, id=0x1234)
ext = addExt(ext, frag6)
if args.esp:
# XXX TODO
esp = None
ext = addExt(ext, esp)
if args.ah:
# XXX TODO
ah = None
ext = addExt(ext, ah)
if args.dest:
dest = sp.IPv6ExtHdrDestOpt(options = \
sp.PadN(optdata="\x00\x00\x00\x00\x00\x00"))
ext = addExt(ext, dest)
if args.mobi:
# XXX TODO
mobi = None
ext = addExt(ext, mobi)
if args.hip:
# XXX TODO
hip = None
ext = addExt(ext, hip)
if args.shim6:
# XXX TODO
shim6 = None
ext = addExt(ext, shim6)
if args.proto253:
# XXX TODO
tft = None
ext = addExt(ext, tft)
if args.proto254:
# XXX TODO
tff = None
ext = addExt(ext, tff)
if args.hbhbad:
hbhbad = sp.IPv6ExtHdrHopByHop(options = \
sp.PadN(optdata="\x00\x00\x00\x00\x00\x00"))
ext = addExt(ext, hbhbad)
return ext
