def test_empty_mixed1_w_hop_opt_registered(child, iface, hw_dst, ll_dst,
ll_src):
# Register to hop-by-hop-option header
register_protnum(child, EXT_HDR_NH[IPv6ExtHdrHopByHop])
# Try sending a packet with a number of extension headers in recommended
# order: https://tools.ietf.org/html/rfc8200#section-4.1
sendp(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrHopByHop() / IPv6ExtHdrDestOpt() / IPv6ExtHdrRouting() /
IPv6ExtHdrFragment() / IPv6ExtHdrDestOpt() / UDP() / "\x01\x02",
iface=iface,
verbose=0)
# Hop-by-hop option with payload
child.expect(r"~~ SNIP 0 - size:\s+(\d+) byte, type: NETTYPE_\w+ \(\d+\)")
ipv6_payload_len = int(child.match.group(1))
# NH = IPv6ExtHdrDestOpt, len = 0x00, PadN option (0x01) of length 0x04
# NH = IPv6ExtHdrRouting, len = 0x00, PadN option (0x01) of length 0x04
child.expect(r"00000000 {:02X} 00 01 04 00 00 00 00 "
r"{:02X} 00 01 04 00 00 00 00".format(
EXT_HDR_NH[IPv6ExtHdrDestOpt],
EXT_HDR_NH[IPv6ExtHdrRouting]))
# NH = IPv6ExtHdrFragment, len = 0x00, routing type = 0, segments left = 0
# NH = IPv6ExtHdrDestOpt, reserved = 0x00, fragment offset = 0, res = 0, M = 0
child.expect(r"00000010 {:02X} 00 00 00 00 00 00 00 "
r"{:02X} 00 00 00 00 00 00 00".format(
EXT_HDR_NH[IPv6ExtHdrFragment],
EXT_HDR_NH[IPv6ExtHdrDestOpt]))
# NH = 17 (UDP), len = 0x00, PadN option (0x01) of length 0x04
child.expect(r"00000020 11 00 01 04 00 00 00 00")
# IPv6 header
child.expect(r"~~ SNIP 1 - size:\s+40 byte, type: NETTYPE_IPV6 \(\d+\)")
child.expect_exact(r"length: {} next header: {}".format(
ipv6_payload_len, EXT_HDR_NH[IPv6ExtHdrHopByHop]))
child.expect_exact(r"destination address: {}".format(ll_dst))
pktbuf_empty(child)
unregister(child)
def test_empty_dest_opt_wo_register(child, iface, hw_dst, ll_dst, ll_src):
# Try sending an empty Destination-Option header
sendp(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrDestOpt() / UDP(),
iface=iface,
verbose=0)
pktbuf_empty(child)
def test_empty_dst_opt_large_hdr_len(child, iface, hw_dst, ll_dst, ll_src):
# Register to hop-by-hop-option header
register_protnum(child, EXT_HDR_NH[IPv6ExtHdrDestOpt])
# Try sending an empty hop-by-hop-option header with too big header length
sendp(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrDestOpt(len=20) / UDP() / "\x01\x02",
iface=iface,
verbose=0)
pktbuf_empty(child)
unregister(child)
def test_dst_opt_7_pad1(child, iface, hw_dst, ll_dst, ll_src):
# Register to hop-by-hop-option header
register_protnum(child, EXT_HDR_NH[UDP])
sendp(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrDestOpt(nh=EXT_HDR_NH[UDP], autopad=0) / Pad1() / Pad1() /
Pad1() / Pad1() / Pad1() / Pad1() / UDP() / "\x01\x02",
iface=iface,
verbose=0)
child.expect(r"~~ SNIP 0 - size: 10 byte, type: NETTYPE_UNDEF \(\d+\)",
timeout=RECV_TIMEOUT)
pktbuf_empty(child)
unregister(child)
def test_empty_non_first_hop_by_hop_opt(child, iface, hw_dst, ll_dst, ll_src):
# Try sending empty hop-by-hop-option header after destination option
# header
p = srp1(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrDestOpt() / IPv6ExtHdrHopByHop() / UDP() / "\x05\x06",
iface=iface,
timeout=1,
verbose=0)
# should return parameter problem message
assert (p is not None)
assert (ICMPv6ParamProblem in p)
assert (p[ICMPv6ParamProblem].code == 1) # unrecognized next header
assert (p[ICMPv6ParamProblem].ptr >= 40) # after IPv6 header
pktbuf_empty(child)
def test_dst_opt_only_one_pad1(child, iface, hw_dst, ll_dst, ll_src):
# Register to hop-by-hop-option header
register_protnum(child, EXT_HDR_NH[UDP])
# send malformed packet with only one Pad1 option
sendp(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrDestOpt(autopad=0) / UDP() / "\x01\x02",
iface=iface,
verbose=0)
res = child.expect(
# 10 bytes == UDP header plus 2 byte payload
[r"~~ SNIP 0 - size: 10 byte, type: NETTYPE_UNDEF \(\d+\)", TIMEOUT],
timeout=RECV_TIMEOUT)
# We expect the header parsing to be messed up
assert res > 0
pktbuf_empty(child)
unregister(child)
def test_empty_duplicate_non_first_hop_by_hop_opt(child, iface, hw_dst, ll_dst,
ll_src):
# Try sending empty hop-by-hop-option header after destination option
# header and another hop-by-hop-option header
p = srp1(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrHopByHop() / IPv6ExtHdrDestOpt() /
IPv6ExtHdrHopByHop() / UDP() / "\x07\x08",
iface=iface,
timeout=RECV_TIMEOUT,
verbose=0)
# should return parameter problem message
assert p is not None
assert ICMPv6ParamProblem in p
assert p[ICMPv6ParamProblem].code == 1 # unrecognized next header
assert p[ICMPv6ParamProblem].ptr >= 48 # after IPv6 header and HopByHopOpt
pktbuf_empty(child)
def test_dst_opt_broken_padn(child, iface, hw_dst, ll_dst, ll_src):
# Register to hop-by-hop-option header
register_protnum(child, EXT_HDR_NH[UDP])
sendp(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrDestOpt(nh=EXT_HDR_NH[UDP], autopad=0) /
PadN(optlen=7, optdata="\x11\x22\x33\x44\x55\x66\x77") / UDP() /
"\x01\x02",
iface=iface,
verbose=0)
res = child.expect(
# 10 bytes == UDP header plus 2 byte payload
[r"~~ SNIP 0 - size: 10 byte, type: NETTYPE_UNDEF \(\d+\)", TIMEOUT],
timeout=RECV_TIMEOUT)
# We expect the header parsing to be messed up
assert res > 0
pktbuf_empty(child)
unregister(child)
def test_empty_dest_opt_w_register(child, iface, hw_dst, ll_dst, ll_src):
# Register to Destination-Option header
register_protnum(child, EXT_HDR_NH[IPv6ExtHdrDestOpt])
# Try sending an empty Destination-Option header
sendp(Ether(dst=hw_dst) / IPv6(dst=ll_dst, src=ll_src) /
IPv6ExtHdrDestOpt() / UDP() / "\x01\x02",
iface=iface,
verbose=0)
child.expect(r"~~ SNIP 0 - size:\s+(\d+) byte, type: NETTYPE_\w+ \(\d+\)")
ipv6_payload_len = int(child.match.group(1))
# NH = 17 (UDP), len = 0x00, PadN option (0x01) of length 0x04
child.expect(r"00000000 11 00 01 04 00 00 00 00")
child.expect(r"~~ SNIP 1 - size:\s+40 byte, type: NETTYPE_IPV6 \(\d+\)")
child.expect_exact(r"length: {} next header: {}".format(
ipv6_payload_len, EXT_HDR_NH[IPv6ExtHdrDestOpt]))
child.expect_exact(r"destination address: {}".format(ll_dst))
pktbuf_empty(child)
unregister(child)