_id
stringlengths 2
7
| title
stringlengths 1
88
| partition
stringclasses 3
values | text
stringlengths 75
19.8k
| language
stringclasses 1
value | meta_information
dict |
|---|---|---|---|---|---|
q1200
|
HIP._read_para_reg_from
|
train
|
def _read_para_reg_from(self, code, cbit, clen, *, desc, length, version):
"""Read HIP REG_FROM parameter.
Structure of HIP REG_FROM parameter [RFC 5770]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Port | Protocol | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Address |
| |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 reg_from.type Parameter Type
1 15 reg_from.critical Critical Bit
2 16 reg_from.length Length of Contents
4 32 reg_from.port Port
6 48 reg_from.protocol Protocol
7 56 - Reserved
8 64 reg_from.ip Address (IPv6)
"""
if clen != 20:
raise ProtocolError(f'HIPv{version}: [Parano {code}] invalid format')
_port = self._read_unpack(2)
_ptcl = self._read_unpack(1)
_resv = self._read_fileng(1)
_addr = self._read_fileng(16)
reg_from = dict(
type=desc,
critical=cbit,
length=clen,
port=_port,
protocol=TP_PROTO.get(_ptcl),
ip=ipaddress.ip_address(_addr),
)
return reg_from
|
python
|
{
"resource": ""
}
|
q1201
|
HIP._read_para_echo_response_signed
|
train
|
def _read_para_echo_response_signed(self, code, cbit, clen, *, desc, length, version):
"""Read HIP ECHO_RESPONSE_SIGNED parameter.
Structure of HIP ECHO_RESPONSE_SIGNED parameter [RFC 7401]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Opaque data (variable length) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 echo_response_signed.type Parameter Type
1 15 echo_response_signed.critical Critical Bit
2 16 echo_response_signed.length Length of Contents
4 32 echo_response_signed.data Opaque Data
"""
_data = self._read_fileng(clen)
echo_response_signed = dict(
type=desc,
critical=cbit,
length=clen,
data=_data,
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return echo_response_signed
|
python
|
{
"resource": ""
}
|
q1202
|
HIP._read_para_transport_format_list
|
train
|
def _read_para_transport_format_list(self, code, cbit, clen, *, desc, length, version):
"""Read HIP TRANSPORT_FORMAT_LIST parameter.
Structure of HIP TRANSPORT_FORMAT_LIST parameter [RFC 7401]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TF type #1 | TF type #2 /
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/ TF type #n | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 transport_format_list.type Parameter Type
1 15 transport_format_list.critical Critical Bit
2 16 transport_format_list.length Length of Contents
4 32 transport_format_list.tf_type TF Type
............
? ? - Padding
"""
if clen % 2 != 0:
raise ProtocolError(f'HIPv{version}: [Parano {code}] invalid format')
_tfid = list()
for _ in range(clen // 2):
_tfid.append(self._read_unpack(2))
transport_format_list = dict(
type=desc,
critical=cbit,
length=clen,
tf_type=tuple(_tfid),
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return transport_format_list
|
python
|
{
"resource": ""
}
|
q1203
|
HIP._read_para_esp_transform
|
train
|
def _read_para_esp_transform(self, code, cbit, clen, *, desc, length, version):
"""Read HIP ESP_TRANSFORM parameter.
Structure of HIP ESP_TRANSFORM parameter [RFC 7402]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved | Suite ID #1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Suite ID #2 | Suite ID #3 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Suite ID #n | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 esp_transform.type Parameter Type
1 15 esp_transform.critical Critical Bit
2 16 esp_transform.length Length of Contents
4 32 - Reserved
6 48 esp_transform.id Suite ID
............
? ? - Padding
"""
if clen % 2 != 0:
raise ProtocolError(f'HIPv{version}: [Parano {code}] invalid format')
_resv = self._read_fileng(2)
_stid = list()
for _ in range((clen - 2) // 2):
_stid.append(_ESP_SUITE_ID.get(self._read_unpack(2), 'Unassigned'))
esp_transform = dict(
type=desc,
critical=cbit,
length=clen,
id=tuple(_stid),
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return esp_transform
|
python
|
{
"resource": ""
}
|
q1204
|
HIP._read_para_seq_data
|
train
|
def _read_para_seq_data(self, code, cbit, clen, *, desc, length, version):
"""Read HIP SEQ_DATA parameter.
Structure of HIP SEQ_DATA parameter [RFC 6078]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Sequence number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 seq_data.type Parameter Type
1 15 seq_data.critical Critical Bit
2 16 seq_data.length Length of Contents
4 32 seq_data.seq Sequence number
"""
if clen != 4:
raise ProtocolError(f'HIPv{version}: [Parano {code}] invalid format')
_seqn = self._read_unpack(4)
seq_data = dict(
type=desc,
critical=cbit,
length=clen,
seq=_seqn,
)
return seq_data
|
python
|
{
"resource": ""
}
|
q1205
|
HIP._read_para_route_dst
|
train
|
def _read_para_route_dst(self, code, cbit, clen, *, desc, length, version):
"""Read HIP ROUTE_DST parameter.
Structure of HIP ROUTE_DST parameter [RFC 6028]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Flags | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| HIT #1 |
| |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. . .
. . .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| HIT #n |
| |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 route_dst.type Parameter Type
1 15 route_dst.critical Critical Bit
2 16 route_dst.length Length of Contents
4 32 route_dst.flags Flags
4 32 route_dst.flags.symmetric SYMMETRIC [RFC 6028]
4 33 route_dst.flags.must_follow MUST_FOLLOW [RFC 6028]
6 48 - Reserved
8 64 route_dst.ip HIT
............
"""
if (clen - 4) % 16 != 0:
raise ProtocolError(f'HIPv{version}: [Parano {code}] invalid format')
_flag = self._read_binary(2)
_resv = self._read_fileng(2)
_addr = list()
for _ in range((clen - 4) // 16):
_addr.append(ipaddress.ip_address(self._read_fileng(16)))
route_dst = dict(
type=desc,
critical=cbit,
length=clen,
flags=dict(
symmetric=True if int(_flag[0], base=2) else False,
must_follow=True if int(_flag[1], base=2) else False,
),
ip=tuple(_addr),
)
return route_dst
|
python
|
{
"resource": ""
}
|
q1206
|
HIP._read_para_hip_transport_mode
|
train
|
def _read_para_hip_transport_mode(self, code, cbit, clen, *, desc, length, version):
"""Read HIP HIP_TRANSPORT_MODE parameter.
Structure of HIP HIP_TRANSPORT_MODE parameter [RFC 6261]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Port | Mode ID #1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mode ID #2 | Mode ID #3 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Mode ID #n | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hip_transport_mode.type Parameter Type
1 15 hip_transport_mode.critical Critical Bit
2 16 hip_transport_mode.length Length of Contents
4 32 hip_transport_mode.port Port
6 48 hip_transport_mode.id Mode ID
............
? ? - Padding
"""
if clen % 2 != 0:
raise ProtocolError(f'HIPv{version}: [Parano {code}] invalid format')
_port = self._read_unpack(2)
_mdid = list()
for _ in range((clen - 2) // 2):
_mdid.append(_TP_MODE_ID.get(self._read_unpack(2), 'Unassigned'))
hip_transport_mode = dict(
type=desc,
critical=cbit,
length=clen,
port=_port,
id=tuple(_mdid),
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return hip_transport_mode
|
python
|
{
"resource": ""
}
|
q1207
|
HIP._read_para_hip_mac
|
train
|
def _read_para_hip_mac(self, code, cbit, clen, *, desc, length, version):
"""Read HIP HIP_MAC parameter.
Structure of HIP HIP_MAC parameter [RFC 7401]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| HMAC |
/ /
/ +-------------------------------+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hip_mac.type Parameter Type
1 15 hip_mac.critical Critical Bit
2 16 hip_mac.length Length of Contents
4 32 hip_mac.hmac HMAC
? ? - Padding
"""
_hmac = self._read_fileng(clen)
hip_mac = dict(
type=desc,
critical=cbit,
length=clen,
hmac=_hmac,
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return hip_mac
|
python
|
{
"resource": ""
}
|
q1208
|
HIP._read_para_hip_mac_2
|
train
|
def _read_para_hip_mac_2(self, code, cbit, clen, *, desc, length, version):
"""Read HIP HIP_MAC_2 parameter.
Structure of HIP HIP_MAC_2 parameter [RFC 7401]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| HMAC |
/ /
/ +-------------------------------+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hip_mac_2.type Parameter Type
1 15 hip_mac_2.critical Critical Bit
2 16 hip_mac_2.length Length of Contents
4 32 hip_mac_2.hmac HMAC
? ? - Padding
"""
_hmac = self._read_fileng(clen)
hip_mac_2 = dict(
type=desc,
critical=cbit,
length=clen,
hmac=_hmac,
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return hip_mac_2
|
python
|
{
"resource": ""
}
|
q1209
|
HIP._read_para_hip_signature_2
|
train
|
def _read_para_hip_signature_2(self, code, cbit, clen, *, desc, length, version):
"""Read HIP HIP_SIGNATURE_2 parameter.
Structure of HIP HIP_SIGNATURE_2 parameter [RFC 7401]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SIG alg | Signature /
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/ | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hip_signature_2.type Parameter Type
1 15 hip_signature_2.critical Critical Bit
2 16 hip_signature_2.length Length of Contents
4 32 hip_signature_2.algorithm SIG Algorithm
6 48 hip_signature_2.signature Signature
? ? - Padding
"""
_algo = self._read_unpack(2)
_sign = self._read_fileng(clen-2)
hip_signature_2 = dict(
type=desc,
critical=cbit,
length=clen,
algorithm=_HI_ALGORITHM.get(_algo, 'Unassigned'),
signature=_sign,
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return hip_signature_2
|
python
|
{
"resource": ""
}
|
q1210
|
HIP._read_para_echo_request_unsigned
|
train
|
def _read_para_echo_request_unsigned(self, code, cbit, clen, *, desc, length, version):
"""Read HIP ECHO_REQUEST_UNSIGNED parameter.
Structure of HIP ECHO_REQUEST_UNSIGNED parameter [RFC 7401]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Opaque data (variable length) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 echo_request_unsigned.type Parameter Type
1 15 echo_request_unsigned.critical Critical Bit
2 16 echo_request_unsigned.length Length of Contents
4 32 echo_request_unsigned.data Opaque Data
"""
_data = self._read_fileng(clen)
echo_request_unsigned = dict(
type=desc,
critical=cbit,
length=clen,
data=_data,
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return echo_request_unsigned
|
python
|
{
"resource": ""
}
|
q1211
|
HIP._read_para_echo_response_unsigned
|
train
|
def _read_para_echo_response_unsigned(self, code, cbit, clen, *, desc, length, version):
"""Read HIP ECHO_RESPONSE_UNSIGNED parameter.
Structure of HIP ECHO_RESPONSE_UNSIGNED parameter [RFC 7401]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Opaque data (variable length) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 echo_response_unsigned.type Parameter Type
1 15 echo_response_unsigned.critical Critical Bit
2 16 echo_response_unsigned.length Length of Contents
4 32 echo_response_unsigned.data Opaque Data
"""
_data = self._read_fileng(clen)
echo_response_unsigned = dict(
type=desc,
critical=cbit,
length=clen,
data=_data,
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return echo_response_unsigned
|
python
|
{
"resource": ""
}
|
q1212
|
HIP._read_para_overlay_ttl
|
train
|
def _read_para_overlay_ttl(self, code, cbit, clen, *, desc, length, version):
"""Read HIP OVERLAY_TTL parameter.
Structure of HIP OVERLAY_TTL parameter [RFC 6078]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TTL | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 overlay_ttl.type Parameter Type
1 15 overlay_ttl.critical Critical Bit
2 16 overlay_ttl.length Length of Contents
4 32 overlay_ttl.ttl TTL
6 48 - Reserved
"""
if clen != 4:
raise ProtocolError(f'HIPv{version}: [Parano {code}] invalid format')
_ttln = self._read_unpack(2)
overlay_ttl = dict(
type=desc,
critical=cbit,
length=clen,
ttl=_ttln,
)
return overlay_ttl
|
python
|
{
"resource": ""
}
|
q1213
|
HIP._read_para_from
|
train
|
def _read_para_from(self, code, cbit, clen, *, desc, length, version):
"""Read HIP FROM parameter.
Structure of HIP FROM parameter [RFC 8004]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Address |
| |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 from.type Parameter Type
1 15 from.critical Critical Bit
2 16 from.length Length of Contents
4 32 from.ip Address
"""
if clen != 16:
raise ProtocolError(f'HIPv{version}: [Parano {code}] invalid format')
_addr = self._read_fileng(16)
from_ = dict(
type=desc,
critical=cbit,
length=clen,
ip=ipaddress.ip_address(_addr),
)
return from_
|
python
|
{
"resource": ""
}
|
q1214
|
HIP._read_para_rvs_hmac
|
train
|
def _read_para_rvs_hmac(self, code, cbit, clen, *, desc, length, version):
"""Read HIP RVS_HMAC parameter.
Structure of HIP RVS_HMAC parameter [RFC 8004]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| HMAC |
/ /
/ +-------------------------------+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 rvs_hmac.type Parameter Type
1 15 rvs_hmac.critical Critical Bit
2 16 rvs_hmac.length Length of Contents
4 32 rvs_hmac.hmac HMAC
? ? - Padding
"""
_hmac = self._read_fileng(clen)
rvs_hmac = dict(
type=desc,
critical=cbit,
length=clen,
hmac=_hmac,
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return rvs_hmac
|
python
|
{
"resource": ""
}
|
q1215
|
HIP._read_para_via_rvs
|
train
|
def _read_para_via_rvs(self, code, cbit, clen, *, desc, length, version):
"""Read HIP VIA_RVS parameter.
Structure of HIP VIA_RVS parameter [RFC 6028]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Address |
| |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. . .
. . .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Address |
| |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 via_rvs.type Parameter Type
1 15 via_rvs.critical Critical Bit
2 16 via_rvs.length Length of Contents
4 32 via_rvs.ip Address
............
"""
if clen % 16 != 0:
raise ProtocolError(f'HIPv{version}: [Parano {code}] invalid format')
_addr = list()
for _ in range(clen // 16):
_addr.append(ipaddress.ip_address(self._read_fileng(16)))
via_rvs = dict(
type=desc,
critical=cbit,
length=clen,
ip=tuple(_addr),
)
return via_rvs
|
python
|
{
"resource": ""
}
|
q1216
|
HIP._read_para_relay_hmac
|
train
|
def _read_para_relay_hmac(self, code, cbit, clen, *, desc, length, version):
"""Read HIP RELAY_HMAC parameter.
Structure of HIP RELAY_HMAC parameter [RFC 5770]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| HMAC |
/ /
/ +-------------------------------+
| | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 relay_hmac.type Parameter Type
1 15 relay_hmac.critical Critical Bit
2 16 relay_hmac.length Length of Contents
4 32 relay_hmac.hmac HMAC
? ? - Padding
"""
_hmac = self._read_fileng(clen)
relay_hmac = dict(
type=desc,
critical=cbit,
length=clen,
hmac=_hmac,
)
_plen = length - clen
if _plen:
self._read_fileng(_plen)
return relay_hmac
|
python
|
{
"resource": ""
}
|
q1217
|
stacklevel
|
train
|
def stacklevel():
"""Fetch current stack level."""
pcapkit = f'{os.path.sep}pcapkit{os.path.sep}'
tb = traceback.extract_stack()
for index, tbitem in enumerate(tb):
if pcapkit in tbitem[0]:
break
else:
index = len(tb)
return (index-1)
|
python
|
{
"resource": ""
}
|
q1218
|
seekset_ng
|
train
|
def seekset_ng(func):
"""Read file from start then set back to original."""
@functools.wraps(func)
def seekcur(file, *args, seekset=os.SEEK_SET, **kw):
# seek_cur = file.tell()
file.seek(seekset, os.SEEK_SET)
return_ = func(file, *args, seekset=seekset, **kw)
# file.seek(seek_cur, os.SEEK_SET)
return return_
return seekcur
|
python
|
{
"resource": ""
}
|
q1219
|
beholder_ng
|
train
|
def beholder_ng(func):
"""Behold analysis procedure."""
@functools.wraps(func)
def behold(file, length, *args, **kwargs):
seek_cur = file.tell()
try:
return func(file, length, *args, **kwargs)
except Exception:
# from pcapkit.foundation.analysis import analyse
from pcapkit.protocols.raw import Raw
error = traceback.format_exc(limit=1).strip().split(os.linesep)[-1]
# error = traceback.format_exc()
file.seek(seek_cur, os.SEEK_SET)
# raw = Raw(file, length, error=str(error))
# return analyse(raw.info, raw.protochain, raw.alias)
next_ = Raw(file, length, error=error)
return next_
return behold
|
python
|
{
"resource": ""
}
|
q1220
|
L2TP.read_l2tp
|
train
|
def read_l2tp(self, length):
"""Read Layer Two Tunnelling Protocol.
Structure of L2TP header [RFC 2661]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|T|L|x|x|S|x|O|P|x|x|x|x| Ver | Length (opt) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Tunnel ID | Session ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Ns (opt) | Nr (opt) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Offset Size (opt) | Offset pad... (opt)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 l2tp.flags Flags and Version Info
0 0 l2tp.flags.type Type (0/1)
0 1 l2tp.flags.len Length
0 2 - Reserved (must be zero)
0 4 l2tp.flags.seq Sequence
0 5 - Reserved (must be zero)
0 6 l2tp.flags.offset Offset
0 7 l2tp.flags.prio Priority
1 8 - Reserved (must be zero)
1 12 l2tp.ver Version (2)
2 16 l2tp.length Length (optional by len)
4 32 l2tp.tunnelid Tunnel ID
6 48 l2tp.sessionid Session ID
8 64 l2tp.ns Sequence Number (optional by seq)
10 80 l2tp.nr Next Sequence Number (optional by seq)
12 96 l2tp.offset Offset Size (optional by offset)
"""
if length is None:
length = len(self)
_flag = self._read_binary(1)
_vers = self._read_fileng(1).hex()[1]
_hlen = self._read_unpack(2) if int(_flag[1]) else None
_tnnl = self._read_unpack(2)
_sssn = self._read_unpack(2)
_nseq = self._read_unpack(2) if int(_flag[4]) else None
_nrec = self._read_unpack(2) if int(_flag[4]) else None
_size = self._read_unpack(2) if int(_flag[6]) else 0
l2tp = dict(
flags=dict(
type='Control' if int(_flag[0]) else 'Data',
len=True if int(_flag[1]) else False,
seq=True if int(_flag[4]) else False,
offset=True if int(_flag[6]) else False,
prio=True if int(_flag[7]) else False,
),
ver=int(_vers, base=16),
length=_hlen,
tunnelid=_tnnl,
sessionid=_sssn,
ns=_nseq,
nr=_nrec,
offset=8*_size or None,
)
hdr_len = _hlen or (6 + 2*(int(_flag[1]) + 2*int(_flag[4]) + int(_flag[6])))
l2tp['hdr_len'] = hdr_len + _size * 8
# if _size:
# l2tp['padding'] = self._read_fileng(_size * 8)
length -= l2tp['hdr_len']
l2tp['packet'] = self._read_packet(header=l2tp['hdr_len'], payload=length)
return self._decode_next_layer(l2tp, length)
|
python
|
{
"resource": ""
}
|
q1221
|
VLAN.read_vlan
|
train
|
def read_vlan(self, length):
"""Read 802.1Q Customer VLAN Tag Type.
Structure of 802.1Q Customer VLAN Tag Type [RFC 7042]:
Octets Bits Name Description
1 0 vlan.tci Tag Control Information
1 0 vlan.tci.pcp Priority Code Point
1 3 vlan.tci.dei Drop Eligible Indicator
1 4 vlan.tci.vid VLAN Identifier
3 24 vlan.type Protocol (Internet Layer)
"""
if length is None:
length = len(self)
_tcif = self._read_binary(2)
_type = self._read_protos(2)
vlan = dict(
tci=dict(
pcp=_PCP.get(int(_tcif[:3], base=2)),
dei=True if _tcif[3] else False,
vid=int(_tcif[4:], base=2),
),
type=_type,
)
length -= 4
vlan['packet'] = self._read_packet(header=4, payload=length)
return self._decode_next_layer(vlan, _type, length)
|
python
|
{
"resource": ""
}
|
q1222
|
TCP._read_tcp_options
|
train
|
def _read_tcp_options(self, size):
"""Read TCP option list.
Positional arguments:
* size -- int, length of option list
Returns:
* tuple -- TCP option list
* dict -- extracted TCP option
"""
counter = 0 # length of read option list
optkind = list() # option kind list
options = dict() # dict of option data
while counter < size:
# get option kind
kind = self._read_unpack(1)
# fetch corresponding option tuple
opts = TCP_OPT.get(kind)
enum = OPT_TYPE.get(kind)
if opts is None:
len_ = size - counter
counter = size
optkind.append(enum)
options[enum.name] = self._read_fileng(len_)
break
# extract option
dscp = opts[1]
if opts[0]:
len_ = self._read_unpack(1)
byte = opts[2](len_)
if byte: # check option process mode
data = process_opt[opts[3]](self, byte, kind)
else: # permission options (length is 2)
data = dict(
kind=kind, # option kind
length=2, # option length
flag=True, # permission flag
)
else: # 1-bytes options
len_ = 1
data = dict(
kind=kind, # option kind
length=1, # option length
)
# record option data
counter += len_
if enum in optkind:
if isinstance(options[dscp], tuple):
options[dscp] += (Info(data),)
else:
options[dscp] = (Info(options[dscp]), Info(data))
else:
optkind.append(enum)
options[dscp] = data
# break when eol triggered
if not kind:
break
# get padding
if counter < size:
len_ = size - counter
options['padding'] = self._read_fileng(len_)
return tuple(optkind), options
|
python
|
{
"resource": ""
}
|
q1223
|
TCP._read_mode_tsopt
|
train
|
def _read_mode_tsopt(self, size, kind):
"""Read Timestamps option.
Positional arguments:
* size - int, length of option
* kind - int, 8 (Timestamps)
Returns:
* dict -- extracted Timestamps (TS) option
Structure of TCP TSopt [RFC 7323]:
+-------+-------+---------------------+---------------------+
|Kind=8 | 10 | TS Value (TSval) |TS Echo Reply (TSecr)|
+-------+-------+---------------------+---------------------+
1 1 4 4
Octets Bits Name Description
0 0 tcp.ts.kind Kind (8)
1 8 tcp.ts.length Length (10)
2 16 tcp.ts.val Timestamp Value
6 48 tcp.ts.ecr Timestamps Echo Reply
"""
temp = struct.unpack('>II', self._read_fileng(size))
data = dict(
kind=kind,
length=size,
val=temp[0],
ecr=temp[1],
)
return data
|
python
|
{
"resource": ""
}
|
q1224
|
TCP._read_mode_pocsp
|
train
|
def _read_mode_pocsp(self, size, kind):
"""Read Partial Order Connection Service Profile option.
Positional arguments:
* size - int, length of option
* kind - int, 10 (POC-Serv Profile)
Returns:
* dict -- extracted Partial Order Connection Service Profile (POC-SP) option
Structure of TCP POC-SP Option [RFC 1693][RFC 6247]:
1 bit 1 bit 6 bits
+----------+----------+------------+----------+--------+
| Kind=10 | Length=3 | Start_flag | End_flag | Filler |
+----------+----------+------------+----------+--------+
Octets Bits Name Description
0 0 tcp.pocsp.kind Kind (10)
1 8 tcp.pocsp.length Length (3)
2 16 tcp.pocsp.start Start Flag
2 17 tcp.pocsp.end End Flag
2 18 tcp.pocsp.filler Filler
"""
temp = self._read_binary(size)
data = dict(
kind=kind,
length=size,
start=True if int(temp[0]) else False,
end=True if int(temp[1]) else False,
filler=bytes(chr(int(temp[2:], base=2)), encoding='utf-8'),
)
return data
|
python
|
{
"resource": ""
}
|
q1225
|
TCP._read_mode_acopt
|
train
|
def _read_mode_acopt(self, size, kind):
"""Read Alternate Checksum Request option.
Positional arguments:
size - int, length of option
kind - int, 14 (Alt-Chksum Request)
Returns:
* dict -- extracted Alternate Checksum Request (CHKSUM-REQ) option
Structure of TCP CHKSUM-REQ [RFC 1146][RFC 6247]:
+----------+----------+----------+
| Kind=14 | Length=3 | chksum |
+----------+----------+----------+
Octets Bits Name Description
0 0 tcp.chksumreq.kind Kind (14)
1 8 tcp.chksumreq.length Length (3)
2 16 tcp.chksumreq.ac Checksum Algorithm
"""
temp = self._read_unpack(size)
algo = chksum_opt.get(temp)
data = dict(
kind=kind,
length=size,
ac=algo,
)
return data
|
python
|
{
"resource": ""
}
|
q1226
|
TCP._read_mode_qsopt
|
train
|
def _read_mode_qsopt(self, size, kind):
"""Read Quick-Start Response option.
Positional arguments:
* size - int, length of option
* kind - int, 27 (Quick-Start Response)
Returns:
* dict -- extracted Quick-Start Response (QS) option
Structure of TCP QSopt [RFC 4782]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Kind | Length=8 | Resv. | Rate | TTL Diff |
| | | |Request| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| QS Nonce | R |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 tcp.qs.kind Kind (27)
1 8 tcp.qs.length Length (8)
2 16 - Reserved (must be zero)
2 20 tcp.qs.req_rate Request Rate
3 24 tcp.qs.ttl_diff TTL Difference
4 32 tcp.qs.nounce QS Nounce
7 62 - Reserved (must be zero)
"""
rvrr = self._read_binary(1)
ttld = self._read_unpack(1)
noun = self._read_fileng(4)
data = dict(
kind=kind,
length=size,
req_rate=int(rvrr[4:], base=2),
ttl_diff=ttld,
nounce=noun[:-2],
)
return data
|
python
|
{
"resource": ""
}
|
q1227
|
TCP._read_mode_utopt
|
train
|
def _read_mode_utopt(self, size, kind):
"""Read User Timeout option.
Positional arguments:
* size - int, length of option
* kind - int, 28 (User Timeout Option)
Returns:
* dict -- extracted User Timeout (TIMEOUT) option
Structure of TCP TIMEOUT [RFC 5482]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Kind = 28 | Length = 4 |G| User Timeout |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 tcp.timeout.kind Kind (28)
1 8 tcp.timeout.length Length (4)
2 16 tcp.timeout.granularity Granularity
2 17 tcp.timeout.timeout User Timeout
"""
temp = self._read_fileng(size)
data = dict(
kind=kind,
length=size,
granularity='minutes' if int(temp[0]) else 'seconds',
timeout=bytes(chr(int(temp[0:], base=2)), encoding='utf-8'),
)
return data
|
python
|
{
"resource": ""
}
|
q1228
|
TCP._read_mode_tcpao
|
train
|
def _read_mode_tcpao(self, size, kind):
"""Read Authentication option.
Positional arguments:
* size - int, length of option
* kind - int, 29 (TCP Authentication Option)
Returns:
* dict -- extracted Authentication (AO) option
Structure of TCP AOopt [RFC 5925]:
+------------+------------+------------+------------+
| Kind=29 | Length | KeyID | RNextKeyID |
+------------+------------+------------+------------+
| MAC ...
+-----------------------------------...
...-----------------+
... MAC (con't) |
...-----------------+
Octets Bits Name Description
0 0 tcp.ao.kind Kind (29)
1 8 tcp.ao.length Length
2 16 tcp.ao.keyid KeyID
3 24 tcp.ao.rnextkeyid RNextKeyID
4 32 tcp.ao.mac Message Authentication Code
"""
key_ = self._read_unpack(1)
rkey = self._read_unpack(1)
mac_ = self._read_fileng(size - 2)
data = dict(
kind=kind,
length=size,
keyid=key_,
rnextkeyid=rkey,
mac=mac_,
)
return data
|
python
|
{
"resource": ""
}
|
q1229
|
TCP._read_mode_mptcp
|
train
|
def _read_mode_mptcp(self, size, kind):
"""Read Multipath TCP option.
Positional arguments:
* size - int, length of option
* kind - int, 30 (Multipath TCP)
Returns:
* dict -- extracted Multipath TCP (MP-TCP) option
Structure of MP-TCP [RFC 6824]:
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+---------------+---------------+-------+-----------------------+
| Kind | Length |Subtype| |
+---------------+---------------+-------+ |
| Subtype-specific data |
| (variable length) |
+---------------------------------------------------------------+
Octets Bits Name Description
0 0 tcp.mp.kind Kind (30)
1 8 tcp.mp.length Length
2 16 tcp.mp.subtype Subtype
2 20 tcp.mp.data Subtype-specific Data
"""
bins = self._read_binary(1)
subt = int(bins[:4], base=2) # subtype number
bits = bins[4:] # 4-bit data
dlen = size - 1 # length of remaining data
# fetch subtype-specific data
func = mptcp_opt.get(subt)
if func is None: # if subtype not exist, directly read all data
temp = self._read_fileng(dlen)
data = dict(
kind=kind,
length=size,
subtype='Unknown',
data=bytes(chr(int(bits[:4], base=2)), encoding='utf-8') + temp,
)
else: # fetch corresponding subtype data dict
data = func(self, bits, dlen, kind)
return data
|
python
|
{
"resource": ""
}
|
q1230
|
TCP._read_mptcp_capable
|
train
|
def _read_mptcp_capable(self, bits, size, kind):
"""Read Multipath Capable option.
Positional arguments:
* bits - str, 4-bit data
* size - int, length of option
* kind - int, 30 (Multipath TCP)
Returns:
* dict -- extracted Multipath Capable (MP_CAPABLE) option
Structure of MP_CAPABLE [RFC 6824]:
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+---------------+---------------+-------+-------+---------------+
| Kind | Length |Subtype|Version|A|B|C|D|E|F|G|H|
+---------------+---------------+-------+-------+---------------+
| Option Sender's Key (64 bits) |
| |
| |
+---------------------------------------------------------------+
| Option Receiver's Key (64 bits) |
| (if option Length == 20) |
| |
+---------------------------------------------------------------+
Octets Bits Name Description
0 0 tcp.mp.kind Kind (30)
1 8 tcp.mp.length Length (12/20)
2 16 tcp.mp.subtype Subtype (0)
2 20 tcp.mp.capable.version Version
3 24 tcp.mp.capable.flags.req Checksum Require Flag (A)
3 25 tcp.mp.capable.flags.ext Extensibility Flag (B)
3 26 tcp.mp.capable.flags.res Unassigned (C-G)
3 31 tcp.mp.capable.flags.hsa HMAC-SHA1 Flag (H)
4 32 tcp.mp.capable.skey Option Sender's Key
12 96 tcp.mp.capable.rkey Option Receiver's Key
(if option Length == 20)
"""
vers = int(bits, base=2)
bins = self._read_binary(1)
skey = self._read_fileng(8)
rkey = self._read_fileng(8) if size == 17 else None
data = dict(
kind=kind,
length=size + 1,
subtype='MP_CAPABLE',
capable=dict(
version=vers,
flags=dict(
req=True if int(bins[0]) else False,
ext=True if int(bins[1]) else False,
res=bytes(chr(int(bits[2:7], base=2)), encoding='utf-8'),
hsa=True if int(bins[7]) else False,
),
skey=skey,
rkey=rkey,
),
)
return data
|
python
|
{
"resource": ""
}
|
q1231
|
TCP._read_mptcp_join
|
train
|
def _read_mptcp_join(self, bits, size, kind):
"""Read Join Connection option.
Positional arguments:
* bits - str, 4-bit data
* size - int, length of option
* kind - int, 30 (Multipath TCP)
Returns:
* dict -- extracted Join Connection (MP_JOIN) option
Structure of MP_JOIN [RFC 6824]:
Octets Bits Name Description
0 0 tcp.mp.kind Kind (30)
1 8 tcp.mp.length Length
2 16 tcp.mp.subtype Subtype (1)
2 20 tcp.mp.data Handshake-specific Data
"""
if self._syn and self._ack: # MP_JOIN-SYN/ACK
return self._read_join_synack(bits, size, kind)
elif self._syn: # MP_JOIN-SYN
return self._read_join_syn(bits, size, kind)
elif self._ack: # MP_JOIN-ACK
return self._read_join_ack(bits, size, kind)
else: # illegal MP_JOIN occurred
temp = self._read_fileng(size)
data = dict(
kind=kind,
length=size + 1,
subtype='MP_JOIN-Unknown',
data=bytes(chr(int(bits[:4], base=2)), encoding='utf-8') + temp,
)
return data
|
python
|
{
"resource": ""
}
|
q1232
|
TCP._read_join_syn
|
train
|
def _read_join_syn(self, bits, size, kind):
"""Read Join Connection option for Initial SYN.
Positional arguments:
* bits - str, 4-bit data
* size - int, length of option
* kind - int, 30 (Multipath TCP)
Returns:
* dict -- extracted Join Connection (MP_JOIN-SYN) option for Initial SYN
Structure of MP_JOIN-SYN [RFC 6824]:
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+---------------+---------------+-------+-----+-+---------------+
| Kind | Length = 12 |Subtype| |B| Address ID |
+---------------+---------------+-------+-----+-+---------------+
| Receiver's Token (32 bits) |
+---------------------------------------------------------------+
| Sender's Random Number (32 bits) |
+---------------------------------------------------------------+
Octets Bits Name Description
0 0 tcp.mp.kind Kind (30)
1 8 tcp.mp.length Length (12)
2 16 tcp.mp.subtype Subtype (1|SYN)
2 20 - Reserved (must be zero)
2 23 tcp.mp.join.syn.backup Backup Path (B)
3 24 tcp.mp.join.syn.addrid Address ID
4 32 tcp.mp.join.syn.token Receiver's Token
8 64 tcp.mp.join.syn.randnum Sender's Random Number
"""
adid = self._read_unpack(1)
rtkn = self._read_fileng(4)
srno = self._read_unpack(4)
data = dict(
kind=kind,
length=size + 1,
subtype='MP_JOIN-SYN',
join=dict(
syn=dict(
backup=True if int(bits[3]) else False,
addrid=adid,
token=rtkn,
randnum=srno,
),
),
)
return data
|
python
|
{
"resource": ""
}
|
q1233
|
TCP._read_join_ack
|
train
|
def _read_join_ack(self, bits, size, kind):
"""Read Join Connection option for Third ACK.
Positional arguments:
* bits - str, 4-bit data
* size - int, length of option
* kind - int, 30 (Multipath TCP)
Returns:
* dict -- extracted Join Connection (MP_JOIN-ACK) option for Third ACK
Structure of MP_JOIN-ACK [RFC 6824]:
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+---------------+---------------+-------+-----------------------+
| Kind | Length = 24 |Subtype| (reserved) |
+---------------+---------------+-------+-----------------------+
| |
| |
| Sender's HMAC (160 bits) |
| |
| |
+---------------------------------------------------------------+
Octets Bits Name Description
0 0 tcp.mp.kind Kind (30)
1 8 tcp.mp.length Length (24)
2 16 tcp.mp.subtype Subtype (1|ACK)
2 20 - Reserved (must be zero)
4 32 tcp.mp.join.ack.hmac Sender's HMAC
"""
temp = self._read_fileng(20)
data = dict(
kind=kind,
length=size + 1,
subtype='MP_JOIN-ACK',
join=dict(
ack=dict(
hmac=temp,
),
),
)
return data
|
python
|
{
"resource": ""
}
|
q1234
|
TCP._read_mptcp_add
|
train
|
def _read_mptcp_add(self, bits, size, kind):
"""Read Add Address option.
Positional arguments:
* bits - str, 4-bit data
* size - int, length of option
* kind - int, 30 (Multipath TCP)
Returns:
* dict -- extracted Add Address (ADD_ADDR) option
Structure of ADD_ADDR [RFC 6824]:
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+---------------+---------------+-------+-------+---------------+
| Kind | Length |Subtype| IPVer | Address ID |
+---------------+---------------+-------+-------+---------------+
| Address (IPv4 - 4 octets / IPv6 - 16 octets) |
+-------------------------------+-------------------------------+
| Port (2 octets, optional) |
+-------------------------------+
Octets Bits Name Description
0 0 tcp.mp.kind Kind (30)
1 8 tcp.mp.length Length
2 16 tcp.mp.subtype Subtype (3)
2 20 tcp.mp.addaddr.ipver IP Version
3 24 tcp.mp.addaddr.addrid Address ID
4 32 tcp.mp.addaddr.addr IP Address (4/16)
8-20 64-160 tcp.mp.addaddr.port Port (optional)
"""
vers = int(bits, base=2)
adid = self._read_unpack(1)
ipad = self._read_fileng(4) if vers == 4 else self._read_fileng(16)
ip_l = 4 if vers == 4 else 16
pt_l = size - 1 - ip_l
port = self._read_unpack(2) if pt_l else None
data = dict(
kind=kind,
length=size + 1,
subtype='ADD_ADDR',
addaddr=dict(
ipver=vers,
addrid=adid,
addr=ipaddress.ip_address(ipad),
port=port,
),
)
return data
|
python
|
{
"resource": ""
}
|
q1235
|
TCP._read_mptcp_remove
|
train
|
def _read_mptcp_remove(self, bits, size):
"""Read Remove Address option.
Positional arguments:
* bits - str, 4-bit data
* size - int, length of option
Returns:
* dict -- extracted Remove Address (REMOVE_ADDR) option
Structure of REMOVE_ADDR [RFC 6824]:
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+---------------+---------------+-------+-------+---------------+
| Kind | Length = 3+n |Subtype|(resvd)| Address ID | ...
+---------------+---------------+-------+-------+---------------+
(followed by n-1 Address IDs, if required)
Octets Bits Name Description
0 0 tcp.opt.kind Kind (30)
1 8 tcp.opt.length Length
2 16 tcp.opt.mp.subtype Subtype (4)
2 20 - Reserved (must be zero)
3 24 tcp.opt.mp.removeaddr.addrid Address ID (optional list)
"""
adid = []
for _ in size:
adid.append(self._read_unpack(1))
data = dict(
subtype='REMOVE_ADDR',
removeaddr=dict(
addrid=adid or None,
),
)
return data
|
python
|
{
"resource": ""
}
|
q1236
|
TCP._read_mptcp_prio
|
train
|
def _read_mptcp_prio(self, bits, size):
"""Read Change Subflow Priority option.
Positional arguments:
* bits - str, 4-bit data
* size - int, length of option
Returns:
* dict -- extracted Change Subflow Priority (MP_PRIO) option
Structure of MP_PRIO [RFC 6824]:
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+---------------+---------------+-------+-----+-+--------------+
| Kind | Length |Subtype| |B| AddrID (opt) |
+---------------+---------------+-------+-----+-+--------------+
Octets Bits Name Description
0 0 tcp.opt.kind Kind (30)
1 8 tcp.opt.length Length (3/4)
2 16 tcp.opt.mp.subtype Subtype (5)
2 23 tcp.opt.mp.prio.backup Backup Path (B)
3 24 tcp.opt.mp.prio.addrid Address ID (optional)
"""
temp = self._read_unpack(1) if size else None
data = dict(
subtype='MP_PRIO',
prio=dict(
res=b'\x00' * 3,
backup=True if int(bits[3]) else False,
addrid=temp,
),
)
return data
|
python
|
{
"resource": ""
}
|
q1237
|
extract
|
train
|
def extract(fin=None, fout=None, format=None, # basic settings
auto=True, extension=True, store=True, # internal settings
files=False, nofile=False, verbose=False, # output settings
engine=None, layer=None, protocol=None, # extraction settings
ip=False, ipv4=False, ipv6=False, tcp=False, strict=True, # reassembly settings
trace=False, trace_fout=None, trace_format=None, # trace settings
trace_byteorder=sys.byteorder, trace_nanosecond=False): # trace settings
"""Extract a PCAP file.
Keyword arguments:
* fin -- str, file name to be read; if file not exist, raise an error
* fout -- str, file name to be written
* format -- str, file format of output
<keyword> 'plist' / 'json' / 'tree' / 'html'
* auto -- bool, if automatically run till EOF (default is True)
<keyword> True / False
* extension -- bool, if check and append extensions to output file (default is True)
<keyword> True / False
* store -- bool, if store extracted packet info (default is True)
<keyword> True / False
* files -- bool, if split each frame into different files (default is False)
<keyword> True / False
* nofile -- bool, if no output file is to be dumped (default is False)
<keyword> True / False
* verbose -- bool, if print verbose output information (default is False)
<keyword> True / False
* engine -- str, extraction engine to be used
<keyword> 'default | pcapkit'
* layer -- str, extract til which layer
<keyword> 'Link' / 'Internet' / 'Transport' / 'Application'
* protocol -- str, extract til which protocol
<keyword> available protocol name
* ip -- bool, if record data for IPv4 & IPv6 reassembly (default is False)
<keyword> True / False
* ipv4 -- bool, if perform IPv4 reassembly (default is False)
<keyword> True / False
* ipv6 -- bool, if perform IPv6 reassembly (default is False)
<keyword> True / False
* tcp -- bool, if perform TCP reassembly (default is False)
<keyword> True / False
* strict -- bool, if set strict flag for reassembly (default is True)
<keyword> True / False
* trace -- bool, if trace TCP traffic flows (default is False)
<keyword> True / False
* trace_fout -- str, path name for flow tracer if necessary
* trace_format -- str, output file format of flow tracer
<keyword> 'plist' / 'json' / 'tree' / 'html' / 'pcap'
* trace_byteorder -- str, output file byte order
<keyword> 'little' / 'big'
* trace_nanosecond -- bool, output nanosecond-resolution file flag
<keyword> True / False
Returns:
* Extractor -- an Extractor object form `pcapkit.extractor`
"""
if isinstance(layer, type) and issubclass(layer, Protocol):
layer = layer.__layer__
if isinstance(protocol, type) and issubclass(protocol, Protocol):
protocol = protocol.__index__()
str_check(fin or '', fout or '', format or '',
trace_fout or '', trace_format or '',
engine or '', layer or '', *(protocol or ''))
bool_check(files, nofile, verbose, auto, extension, store,
ip, ipv4, ipv6, tcp, strict, trace)
return Extractor(fin=fin, fout=fout, format=format,
store=store, files=files, nofile=nofile,
auto=auto, verbose=verbose, extension=extension,
engine=engine, layer=layer, protocol=protocol,
ip=ip, ipv4=ipv4, ipv6=ipv6, tcp=tcp, strict=strict,
trace=trace, trace_fout=trace_fout, trace_format=trace_format,
trace_byteorder=trace_byteorder, trace_nanosecond=trace_nanosecond)
|
python
|
{
"resource": ""
}
|
q1238
|
reassemble
|
train
|
def reassemble(protocol, strict=False):
"""Reassemble fragmented datagrams.
Keyword arguments:
* protocol -- str, protocol to be reassembled
* strict -- bool, if return all datagrams (including those not implemented) when submit (default is False)
<keyword> True / False
Returns:
* [if protocol is IPv4] IPv4_Reassembly -- a Reassembly object from `pcapkit.reassembly`
* [if protocol is IPv6] IPv6_Reassembly -- a Reassembly object from `pcapkit.reassembly`
* [if protocol is TCP] TCP_Reassembly -- a Reassembly object from `pcapkit.reassembly`
"""
if isinstance(protocol, type) and issubclass(protocol, Protocol):
protocol = protocol.__index__()
str_check(protocol)
bool_check(strict)
if protocol == 'IPv4':
return IPv4_Reassembly(strict=strict)
elif protocol == 'IPv6':
return IPv6_Reassembly(strict=strict)
elif protocol == 'TCP':
return TCP_Reassembly(strict=strict)
else:
raise FormatError(f'Unsupported reassembly protocol: {protocol}')
|
python
|
{
"resource": ""
}
|
q1239
|
trace
|
train
|
def trace(fout=None, format=None, byteorder=sys.byteorder, nanosecond=False):
"""Trace TCP flows.
Keyword arguments:
* fout -- str, output path
* format -- str, output format
* byteorder -- str, output file byte order
* nanosecond -- bool, output nanosecond-resolution file flag
"""
str_check(fout or '', format or '')
return TraceFlow(fout=fout, format=format, byteorder=byteorder, nanosecond=nanosecond)
|
python
|
{
"resource": ""
}
|
q1240
|
IPv6_Frag.read_ipv6_frag
|
train
|
def read_ipv6_frag(self, length, extension):
"""Read Fragment Header for IPv6.
Structure of IPv6-Frag header [RFC 8200]:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Next Header | Reserved | Fragment Offset |Res|M|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Identification |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 frag.next Next Header
1 8 - Reserved
2 16 frag.offset Fragment Offset
3 29 - Reserved
3 31 frag.mf More Flag
4 32 frag.id Identification
"""
if length is None:
length = len(self)
_next = self._read_protos(1)
_temp = self._read_fileng(1)
_offm = self._read_binary(2)
_ipid = self._read_unpack(4)
ipv6_frag = dict(
next=_next,
length=8,
offset=int(_offm[:13], base=2),
mf=True if int(_offm[15], base=2) else False,
id=_ipid,
)
length -= ipv6_frag['length']
ipv6_frag['packet'] = self._read_packet(header=8, payload=length)
if extension:
self._protos = None
return ipv6_frag
return self._decode_next_layer(ipv6_frag, _next, length)
|
python
|
{
"resource": ""
}
|
q1241
|
IPv4._read_ipv4_options
|
train
|
def _read_ipv4_options(self, size=None):
"""Read IPv4 option list.
Positional arguments:
* size -- int, buffer size
Returns:
* tuple -- IPv4 option list
* dict -- extracted IPv4 option
"""
counter = 0 # length of read option list
optkind = list() # option kind list
options = dict() # dict of option data
while counter < size:
# get option kind
kind = self._read_unpack(1)
# fetch corresponding option tuple
opts = IPv4_OPT.get(kind)
if opts is None:
len_ = size - counter
counter = size
options['Unknown'] = self._read_fileng(len_)
break
# extract option
dscp = OPT_TYPE.get(kind)
desc = dscp.name
if opts[0]:
byte = self._read_unpack(1)
if byte: # check option process mode
data = process_opt[opts[2]](self, byte, kind)
else: # permission options (length is 2)
data = dict(
kind=kind, # option kind
type=self._read_opt_type(kind), # option type info
length=2, # option length
flag=True, # permission flag
)
else: # 1-bytes options
byte = 1
data = dict(
kind=kind, # option kind
type=self._read_opt_type(kind), # option type info
length=1, # option length
)
# record option data
counter += byte
if dscp in optkind:
if isinstance(options[desc], tuple):
options[desc] += (Info(data),)
else:
options[desc] = (Info(options[desc]), Info(data))
else:
optkind.append(dscp)
options[desc] = data
# break when eol triggered
if not kind:
break
# get padding
if counter < size:
len_ = size - counter
self._read_binary(len_)
return tuple(optkind), options
|
python
|
{
"resource": ""
}
|
q1242
|
IPv4._read_mode_route
|
train
|
def _read_mode_route(self, size, kind):
"""Read options with route data.
Positional arguments:
* size - int, length of option
* kind - int, 7/131/137 (RR/LSR/SSR)
Returns:
* dict -- extracted option with route data
Structure of these options:
* [RFC 791] Loose Source Route
+--------+--------+--------+---------//--------+
|10000011| length | pointer| route data |
+--------+--------+--------+---------//--------+
* [RFC 791] Strict Source Route
+--------+--------+--------+---------//--------+
|10001001| length | pointer| route data |
+--------+--------+--------+---------//--------+
* [RFC 791] Record Route
+--------+--------+--------+---------//--------+
|00000111| length | pointer| route data |
+--------+--------+--------+---------//--------+
Octets Bits Name Description
0 0 ip.opt.kind Kind (7/131/137)
0 0 ip.opt.type.copy Copied Flag (0)
0 1 ip.opt.type.class Option Class (0/1)
0 3 ip.opt.type.number Option Number (3/7/9)
1 8 ip.opt.length Length
2 16 ip.opt.pointer Pointer (≥4)
3 24 ip.opt.data Route Data
"""
if size < 3 or (size - 3) % 4 != 0:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
_rptr = self._read_unpack(1)
if _rptr < 4:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
data = dict(
kind=kind,
type=self._read_opt_type(kind),
length=size,
pointer=_rptr,
)
counter = 4
address = list()
endpoint = min(_rptr, size)
while counter < endpoint:
counter += 4
address.append(self._read_ipv4_addr())
data['ip'] = address or None
return data
|
python
|
{
"resource": ""
}
|
q1243
|
IPv4._read_mode_qs
|
train
|
def _read_mode_qs(self, size, kind):
"""Read Quick Start option.
Positional arguments:
* size - int, length of option
* kind - int, 25 (QS)
Returns:
* dict -- extracted Quick Start (QS) option
Structure of Quick-Start (QS) option [RFC 4782]:
* A Quick-Start Request.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Option | Length=8 | Func. | Rate | QS TTL |
| | | 0000 |Request| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| QS Nonce | R |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* Report of Approved Rate.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Option | Length=8 | Func. | Rate | Not Used |
| | | 1000 | Report| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| QS Nonce | R |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 ip.qs.kind Kind (25)
0 0 ip.qs.type.copy Copied Flag (0)
0 1 ip.qs.type.class Option Class (0)
0 3 ip.qs.type.number Option Number (25)
1 8 ip.qs.length Length (8)
2 16 ip.qs.func Function (0/8)
2 20 ip.qs.rate Rate Request / Report (in Kbps)
3 24 ip.qs.ttl QS TTL / None
4 32 ip.qs.nounce QS Nounce
7 62 - Reserved (\x00\x00)
"""
if size != 8:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
_type = self._read_opt_type(kind)
_fcrr = self._read_binary(1)
_func = int(_fcrr[:4], base=2)
_rate = int(_fcrr[4:], base=2)
_ttlv = self._read_unpack(1)
_nonr = self._read_binary(4)
_qsnn = int(_nonr[:30], base=2)
if _func != 0 and _func != 8:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
data = dict(
kind=kind,
type=_type,
length=size,
func=QS_FUNC.get(_func),
rate=40000 * (2 ** _rate) / 1000,
ttl=None if _func else _rate,
nounce=_qsnn,
)
return data
|
python
|
{
"resource": ""
}
|
q1244
|
IPv4._read_mode_ts
|
train
|
def _read_mode_ts(self, size, kind):
"""Read Time Stamp option.
Positional arguments:
* size - int, length of option
* kind - int, 68 (TS)
Returns:
* dict -- extracted Time Stamp (TS) option
Structure of Timestamp (TS) option [RFC 791]:
+--------+--------+--------+--------+
|01000100| length | pointer|oflw|flg|
+--------+--------+--------+--------+
| internet address |
+--------+--------+--------+--------+
| timestamp |
+--------+--------+--------+--------+
| . |
.
.
Octets Bits Name Description
0 0 ip.ts.kind Kind (25)
0 0 ip.ts.type.copy Copied Flag (0)
0 1 ip.ts.type.class Option Class (0)
0 3 ip.ts.type.number Option Number (25)
1 8 ip.ts.length Length (≤40)
2 16 ip.ts.pointer Pointer (≥5)
3 24 ip.ts.overflow Overflow Octets
3 28 ip.ts.flag Flag
4 32 ip.ts.ip Internet Address
8 64 ip.ts.timestamp Timestamp
"""
if size > 40 or size < 4:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
_tptr = self._read_unpack(1)
_oflg = self._read_binary(1)
_oflw = int(_oflg[:4], base=2)
_flag = int(_oflg[4:], base=2)
if _tptr < 5:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
data = dict(
kind=kind,
type=self._read_opt_type(kind),
length=size,
pointer=_tptr,
overflow=_oflw,
flag=_flag,
)
endpoint = min(_tptr, size)
if _flag == 0:
if (size - 4) % 4 != 0:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
counter = 5
timestamp = list()
while counter < endpoint:
counter += 4
time = self._read_unpack(4, lilendian=True)
timestamp.append(datetime.datetime.fromtimestamp(time))
data['timestamp'] = timestamp or None
elif _flag == 1 or _flag == 3:
if (size - 4) % 8 != 0:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
counter = 5
ipaddress = list()
timestamp = list()
while counter < endpoint:
counter += 8
ipaddress.append(self._read_ipv4_addr())
time = self._read_unpack(4, lilendian=True)
timestamp.append(datetime.datetime.fromtimestamp(time))
data['ip'] = ipaddress or None
data['timestamp'] = timestamp or None
else:
data['data'] = self._read_fileng(size - 4) or None
return data
|
python
|
{
"resource": ""
}
|
q1245
|
IPv4._read_mode_tr
|
train
|
def _read_mode_tr(self, size, kind):
"""Read Traceroute option.
Positional arguments:
size - int, length of option
kind - int, 82 (TR)
Returns:
* dict -- extracted Traceroute (TR) option
Structure of Traceroute (TR) option [RFC 1393][RFC 6814]:
0 8 16 24
+-+-+-+-+-+-+-+-+---------------+---------------+---------------+
|F| C | Number | Length | ID Number |
+-+-+-+-+-+-+-+-+---------------+---------------+---------------+
| Outbound Hop Count | Return Hop Count |
+---------------+---------------+---------------+---------------+
| Originator IP Address |
+---------------+---------------+---------------+---------------+
Octets Bits Name Description
0 0 ip.tr.kind Kind (82)
0 0 ip.tr.type.copy Copied Flag (0)
0 1 ip.tr.type.class Option Class (0)
0 3 ip.tr.type.number Option Number (18)
1 8 ip.tr.length Length (12)
2 16 ip.tr.id ID Number
4 32 ip.tr.ohc Outbound Hop Count
6 48 ip.tr.rhc Return Hop Count
8 64 ip.tr.ip Originator IP Address
"""
if size != 12:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
_idnm = self._read_unpack(2)
_ohcn = self._read_unpack(2)
_rhcn = self._read_unpack(2)
_ipad = self._read_ipv4_addr()
data = dict(
kind=kind,
type=self._read_opt_type(kind),
length=size,
id=_idnm,
ohc=_ohcn,
rhc=_rhcn,
ip=_ipad,
)
return data
|
python
|
{
"resource": ""
}
|
q1246
|
IPv4._read_mode_sec
|
train
|
def _read_mode_sec(self, size, kind):
"""Read options with security info.
Positional arguments:
size - int, length of option
kind - int, 130 (SEC )/ 133 (ESEC)
Returns:
* dict -- extracted option with security info (E/SEC)
Structure of these options:
* [RFC 1108] Security (SEC)
+------------+------------+------------+-------------//----------+
| 10000010 | XXXXXXXX | SSSSSSSS | AAAAAAA[1] AAAAAAA0 |
| | | | [0] |
+------------+------------+------------+-------------//----------+
TYPE = 130 LENGTH CLASSIFICATION PROTECTION
LEVEL AUTHORITY
FLAGS
* [RFC 1108] Extended Security (ESEC):
+------------+------------+------------+-------//-------+
| 10000101 | 000LLLLL | AAAAAAAA | add sec info |
+------------+------------+------------+-------//-------+
TYPE = 133 LENGTH ADDITIONAL ADDITIONAL
SECURITY INFO SECURITY
FORMAT CODE INFO
Octets Bits Name Description
0 0 ip.sec.kind Kind (130)
0 0 ip.sec.type.copy Copied Flag (1)
0 1 ip.sec.type.class Option Class (0)
0 3 ip.sec.type.number Option Number (2)
1 8 ip.sec.length Length (≥3)
2 16 ip.sec.level Classification Level
3 24 ip.sec.flags Protection Authority Flags
"""
if size < 3:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
_clvl = self._read_unpack(1)
data = dict(
kind=kind,
type=self._read_opt_type(kind),
length=size,
level=_CLASSIFICATION_LEVEL.get(_clvl, _clvl),
)
if size > 3:
_list = list()
for counter in range(3, size):
_flag = self._read_binary(1)
if (counter < size - 1 and not int(_flag[7], base=2)) \
or (counter == size - 1 and int(_flag[7], base=2)):
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
_dict = dict()
for (index, bit) in enumerate(_flag[:5]):
_auth = _PROTECTION_AUTHORITY.get(index)
_dict[_auth] = True if int(bit, base=2) else False
_list.append(Info(_dict))
data['flags'] = tuple(_list)
return data
|
python
|
{
"resource": ""
}
|
q1247
|
IPv4._read_mode_rsralt
|
train
|
def _read_mode_rsralt(self, size, kind):
"""Read Router Alert option.
Positional arguments:
size - int, length of option
kind - int, 148 (RTRALT)
Returns:
* dict -- extracted Router Alert (RTRALT) option
Structure of Router Alert (RTRALT) option [RFC 2113]:
+--------+--------+--------+--------+
|10010100|00000100| 2 octet value |
+--------+--------+--------+--------+
Octets Bits Name Description
0 0 ip.rsralt.kind Kind (148)
0 0 ip.rsralt.type.copy Copied Flag (1)
0 1 ip.rsralt.type.class Option Class (0)
0 3 ip.rsralt.type.number Option Number (20)
1 8 ip.rsralt.length Length (4)
2 16 ip.rsralt.alert Alert
2 16 ip.rsralt.code Alert Code
"""
if size != 4:
raise ProtocolError(f'{self.alias}: [Optno {kind}] invalid format')
_code = self._read_unpack(2)
data = dict(
kind=kind,
type=self._read_opt_type(kind),
length=size,
alert=_ROUTER_ALERT.get(_code, 'Reserved'),
code=_code,
)
return data
|
python
|
{
"resource": ""
}
|
q1248
|
Header.read_header
|
train
|
def read_header(self):
"""Read global header of PCAP file.
Structure of global header (C):
typedef struct pcap_hdr_s {
guint32 magic_number; /* magic number */
guint16 version_major; /* major version number */
guint16 version_minor; /* minor version number */
gint32 thiszone; /* GMT to local correction */
guint32 sigfigs; /* accuracy of timestamps */
guint32 snaplen; /* max length of captured packets, in octets */
guint32 network; /* data link type */
} pcap_hdr_t;
"""
_magn = self._read_fileng(4)
if _magn == b'\xd4\xc3\xb2\xa1':
lilendian = True
self._nsec = False
self._byte = 'little'
elif _magn == b'\xa1\xb2\xc3\xd4':
lilendian = False
self._nsec = False
self._byte = 'big'
elif _magn == b'\x4d\x3c\xb2\xa1':
lilendian = True
self._nsec = True
self._byte = 'little'
elif _magn == b'\xa1\xb2\x3c\x4d':
lilendian = False
self._nsec = True
self._byte = 'big'
else:
raise FileError(5, 'Unknown file format', self._file.name)
_vmaj = self._read_unpack(2, lilendian=lilendian)
_vmin = self._read_unpack(2, lilendian=lilendian)
_zone = self._read_unpack(4, lilendian=lilendian, signed=True)
_acts = self._read_unpack(4, lilendian=lilendian)
_slen = self._read_unpack(4, lilendian=lilendian)
_type = self._read_protos(4)
_byte = self._read_packet(24)
self._file = io.BytesIO(_byte)
header = dict(
magic_number=dict(
data=_magn,
byteorder=self._byte,
nanosecond=self._nsec,
),
version_major=_vmaj,
version_minor=_vmin,
thiszone=_zone,
sigfigs=_acts,
snaplen=_slen,
network=_type,
packet=_byte,
)
return header
|
python
|
{
"resource": ""
}
|
q1249
|
Frame.read_frame
|
train
|
def read_frame(self):
"""Read each block after global header.
Structure of record/package header (C):
typedef struct pcaprec_hdr_s {
guint32 ts_sec; /* timestamp seconds */
guint32 ts_usec; /* timestamp microseconds */
guint32 incl_len; /* number of octets of packet saved in file */
guint32 orig_len; /* actual length of packet */
} pcaprec_hdr_t;
"""
# _scur = self._file.tell()
_temp = self._read_unpack(4, lilendian=True, quiet=True)
if _temp is None:
raise EOFError
_tsss = _temp
_tsus = self._read_unpack(4, lilendian=True)
_ilen = self._read_unpack(4, lilendian=True)
_olen = self._read_unpack(4, lilendian=True)
if self._nsec:
_epch = _tsss + _tsus / 1000000000
else:
_epch = _tsss + _tsus / 1000000
_time = datetime.datetime.fromtimestamp(_epch)
frame = dict(
frame_info=dict(
ts_sec=_tsss,
ts_usec=_tsus,
incl_len=_ilen,
orig_len=_olen,
),
time=_time,
number=self._fnum,
time_epoch=_epch,
len=_ilen,
cap_len=_olen,
)
# load packet data
length = frame['len']
bytes_ = self._file.read(length)
# record file pointer
if self._mpkt and self._mpfp:
# print(self._fnum, 'ready')
self._mpfp.put(self._file.tell())
self._mpkt.pool += 1
# make BytesIO from frame packet data
frame['packet'] = bytes_
self._file = io.BytesIO(bytes_)
# frame['packet'] = self._read_packet(header=0, payload=length, discard=True)
return self._decode_next_layer(frame, length)
|
python
|
{
"resource": ""
}
|
q1250
|
Frame._decode_next_layer
|
train
|
def _decode_next_layer(self, dict_, length=None):
"""Decode next layer protocol.
Positional arguments:
dict_ -- dict, info buffer
proto -- str, next layer protocol name
length -- int, valid (not padding) length
Returns:
* dict -- current protocol with packet extracted
"""
seek_cur = self._file.tell()
try:
next_ = self._import_next_layer(self._prot, length)
except Exception:
dict_['error'] = traceback.format_exc(limit=1).strip().split(os.linesep)[-1]
self._file.seek(seek_cur, os.SEEK_SET)
next_ = beholder(self._import_next_layer)(self, self._prot, length, error=True)
info, chain = next_.info, next_.protochain
# make next layer protocol name
layer = next_.alias.lower()
# proto = next_.__class__.__name__
# write info and protocol chain into dict
self._next = next_
self._protos = chain
dict_[layer] = info
dict_['protocols'] = self._protos.chain
return dict_
|
python
|
{
"resource": ""
}
|
q1251
|
Raw.read_raw
|
train
|
def read_raw(self, length, *, error=None):
"""Read raw packet data."""
if length is None:
length = len(self)
raw = dict(
packet=self._read_fileng(length),
error=error or None,
)
return raw
|
python
|
{
"resource": ""
}
|
q1252
|
ipv6_hdr_len
|
train
|
def ipv6_hdr_len(ipv6):
"""Calculate length of headers before IPv6-Frag"""
hdr_len = ipv6.__hdr_len__
for code in (0, 60, 43):
ext_hdr = ipv6.extension_hdrs.get(code)
if ext_hdr is not None:
hdr_len += ext_hdr.length
return hdr_len
|
python
|
{
"resource": ""
}
|
q1253
|
packet2chain
|
train
|
def packet2chain(packet):
"""Fetch DPKT packet protocol chain."""
chain = [type(packet).__name__]
payload = packet.data
while not isinstance(payload, bytes):
chain.append(type(payload).__name__)
payload = payload.data
return ':'.join(chain)
|
python
|
{
"resource": ""
}
|
q1254
|
packet2dict
|
train
|
def packet2dict(packet, timestamp, *, data_link):
"""Convert DPKT packet into dict."""
def wrapper(packet):
dict_ = dict()
for field in packet.__hdr_fields__:
dict_[field] = getattr(packet, field, None)
payload = packet.data
if not isinstance(payload, bytes):
dict_[type(payload).__name__] = wrapper(payload)
return dict_
return {
'timestamp': timestamp,
'packet': packet.pack(),
data_link.name: wrapper(packet),
}
|
python
|
{
"resource": ""
}
|
q1255
|
HTTPv2._read_http_none
|
train
|
def _read_http_none(self, size, kind, flag):
"""Read HTTP packet with unsigned type."""
if any((int(bit, base=2) for bit in flag)):
raise ProtocolError(f'HTTP/2: [Type {kind}] invalid format', quiet=True)
data = dict(
flags=None,
payload=self._read_fileng(size - 9) or None,
)
return data
|
python
|
{
"resource": ""
}
|
q1256
|
Extractor.run
|
train
|
def run(self):
"""Start extraction."""
flag = True
if self._exeng == 'dpkt':
flag, engine = self.import_test('dpkt', name='DPKT')
if flag:
return self._run_dpkt(engine)
elif self._exeng == 'scapy':
flag, engine = self.import_test('scapy.all', name='Scapy')
if flag:
return self._run_scapy(engine)
elif self._exeng == 'pyshark':
flag, engine = self.import_test('pyshark', name='PyShark')
if flag:
return self._run_pyshark(engine)
elif self._exeng == 'pipeline':
flag, engine = self.import_test('multiprocessing', name='Pipeline Multiprocessing')
self._flag_m = flag = bool(flag and (self._flag_a and CPU_CNT > 1))
if self._flag_m:
return self._run_pipeline(engine)
warnings.warn(f'extraction engine Pipeline Multiprocessing is not available; '
'using default engine instead', EngineWarning, stacklevel=stacklevel())
elif self._exeng == 'server':
flag, engine = self.import_test('multiprocessing', name='Server Multiprocessing')
self._flag_m = flag = bool(flag and (self._flag_a and CPU_CNT > 2))
if self._flag_m:
return self._run_server(engine)
warnings.warn(f'extraction engine Server Multiprocessing is not available; '
'using default engine instead', EngineWarning, stacklevel=stacklevel())
elif self._exeng not in ('default', 'pcapkit'):
flag = False
warnings.warn(f'unsupported extraction engine: {self._exeng}; '
'using default engine instead', EngineWarning, stacklevel=stacklevel())
# using default/pcapkit engine
self._exeng = self._exeng if flag else 'default'
self.record_header() # read PCAP global header
self.record_frames()
|
python
|
{
"resource": ""
}
|
q1257
|
Extractor.record_header
|
train
|
def record_header(self):
"""Read global header.
- Extract global header.
- Make Info object out of header properties.
- Append Info.
- Write plist file.
"""
self._gbhdr = Header(self._ifile)
self._vinfo = self._gbhdr.version
self._dlink = self._gbhdr.protocol
self._nnsec = self._gbhdr.nanosecond
if self._trace is not NotImplemented:
self._trace._endian = self._gbhdr.byteorder
self._trace._nnsecd = self._gbhdr.nanosecond
if not self._flag_q:
if self._flag_f:
ofile = self._ofile(f'{self._ofnm}/Global Header.{self._fext}')
ofile(self._gbhdr.info, name='Global Header')
self._type = ofile.kind
else:
self._ofile(self._gbhdr.info, name='Global Header')
self._type = self._ofile.kind
|
python
|
{
"resource": ""
}
|
q1258
|
Extractor._cleanup
|
train
|
def _cleanup(self):
"""Cleanup after extraction & analysis."""
self._expkg = None
self._extmp = None
self._flag_e = True
self._ifile.close()
|
python
|
{
"resource": ""
}
|
q1259
|
Extractor._aftermathmp
|
train
|
def _aftermathmp(self):
"""Aftermath for multiprocessing."""
if not self._flag_e and self._flag_m:
# join processes
[proc.join() for proc in self._mpprc]
if self._exeng == 'server':
self._mpsvc.join()
# restore attributes
if self._exeng == 'server':
self._frame = list(self._mpfrm)
self._reasm = list(self._mprsm)
self._trace = copy.deepcopy(self._mpkit.trace)
if self._exeng == 'pipeline':
self._frame = [self._mpkit.frames[x] for x in sorted(self._mpkit.frames)]
self._reasm = copy.deepcopy(self._mpkit.reassembly)
self._trace = copy.deepcopy(self._mpkit.trace)
# shutdown & cleanup
self._mpmng.shutdown()
[delattr(self, attr) for attr in filter(lambda s: s.startswith('_mp'), dir(self))]
self._frnum -= 2
|
python
|
{
"resource": ""
}
|
q1260
|
Extractor._update_eof
|
train
|
def _update_eof(self):
"""Update EOF flag."""
self._aftermathmp()
self._ifile.close()
self._flag_e = True
|
python
|
{
"resource": ""
}
|
q1261
|
Extractor._read_frame
|
train
|
def _read_frame(self):
"""Headquarters for frame reader."""
if self._exeng == 'scapy':
return self._scapy_read_frame()
elif self._exeng == 'dpkt':
return self._dpkt_read_frame()
elif self._exeng == 'pyshark':
return self._pyshark_read_frame()
else:
return self._default_read_frame()
|
python
|
{
"resource": ""
}
|
q1262
|
Extractor._default_read_frame
|
train
|
def _default_read_frame(self, *, frame=None, mpkit=None):
"""Read frames with default engine.
- Extract frames and each layer of packets.
- Make Info object out of frame properties.
- Append Info.
- Write plist & append Info.
"""
from pcapkit.toolkit.default import (ipv4_reassembly, ipv6_reassembly,
tcp_reassembly, tcp_traceflow)
# read frame header
if not self._flag_m:
frame = Frame(self._ifile, num=self._frnum+1, proto=self._dlink,
layer=self._exlyr, protocol=self._exptl, nanosecond=self._nnsec)
self._frnum += 1
# verbose output
if self._flag_v:
print(f' - Frame {self._frnum:>3d}: {frame.protochain}')
# write plist
frnum = f'Frame {self._frnum}'
if not self._flag_q:
if self._flag_f:
ofile = self._ofile(f'{self._ofnm}/{frnum}.{self._fext}')
ofile(frame.info, name=frnum)
else:
self._ofile(frame.info, name=frnum)
# record fragments
if self._ipv4:
flag, data = ipv4_reassembly(frame)
if flag:
self._reasm[0](data) # pylint: disable=E1102
if self._ipv6:
flag, data = ipv6_reassembly(frame)
if flag:
self._reasm[1](data) # pylint: disable=E1102
if self._tcp:
flag, data = tcp_reassembly(frame)
if flag:
self._reasm[2](data) # pylint: disable=E1102
# trace flows
if self._flag_t:
flag, data = tcp_traceflow(frame, data_link=self._dlink)
if flag:
self._trace(data)
# record frames
if self._exeng == 'pipeline':
if self._flag_d:
# frame._file = NotImplemented
mpkit.frames[self._frnum] = frame
# print(self._frnum, 'stored')
mpkit.current += 1
elif self._exeng == 'server':
# record frames
if self._flag_d:
# frame._file = NotImplemented
self._frame.append(frame)
# print(self._frnum, 'stored')
self._frnum += 1
else:
if self._flag_d:
self._frame.append(frame)
self._proto = frame.protochain.chain
# return frame record
return frame
|
python
|
{
"resource": ""
}
|
q1263
|
Extractor._run_scapy
|
train
|
def _run_scapy(self, scapy_all):
"""Call scapy.all.sniff to extract PCAP files."""
# if not self._flag_a:
# self._flag_a = True
# warnings.warn(f"'Extractor(engine=scapy)' object is not iterable; "
# "so 'auto=False' will be ignored", AttributeWarning, stacklevel=stacklevel())
if self._exlyr != 'None' or self._exptl != 'null':
warnings.warn("'Extractor(engine=scapy)' does not support protocol and layer threshold; "
f"'layer={self._exlyr}' and 'protocol={self._exptl}' ignored",
AttributeWarning, stacklevel=stacklevel())
# extract & analyse file
self._expkg = scapy_all
self._extmp = iter(scapy_all.sniff(offline=self._ifnm))
# start iteration
self.record_frames()
|
python
|
{
"resource": ""
}
|
q1264
|
Extractor._scapy_read_frame
|
train
|
def _scapy_read_frame(self):
"""Read frames with Scapy."""
from pcapkit.toolkit.scapy import (ipv4_reassembly, ipv6_reassembly,
packet2chain, packet2dict, tcp_reassembly,
tcp_traceflow)
# fetch Scapy packet
packet = next(self._extmp)
# verbose output
self._frnum += 1
self._proto = packet2chain(packet)
if self._flag_v:
print(f' - Frame {self._frnum:>3d}: {self._proto}')
# write plist
frnum = f'Frame {self._frnum}'
if not self._flag_q:
info = packet2dict(packet)
if self._flag_f:
ofile = self._ofile(f'{self._ofnm}/{frnum}.{self._fext}')
ofile(info, name=frnum)
else:
self._ofile(info, name=frnum)
# record frames
if self._flag_d:
# setattr(packet, 'packet2dict', packet2dict)
# setattr(packet, 'packet2chain', packet2chain)
self._frame.append(packet)
# record fragments
if self._ipv4:
flag, data = ipv4_reassembly(packet, count=self._frnum)
if flag:
self._reasm[0](data) # pylint: disable=E1102
if self._ipv6:
flag, data = ipv6_reassembly(packet, count=self._frnum)
if flag:
self._reasm[1](data) # pylint: disable=E1102
if self._tcp:
flag, data = tcp_reassembly(packet, count=self._frnum)
if flag:
self._reasm[2](data) # pylint: disable=E1102
# trace flows
if self._flag_t:
flag, data = tcp_traceflow(packet, count=self._frnum)
if flag:
self._trace(data)
return packet
|
python
|
{
"resource": ""
}
|
q1265
|
Extractor._run_dpkt
|
train
|
def _run_dpkt(self, dpkt):
"""Call dpkt.pcap.Reader to extract PCAP files."""
# if not self._flag_a:
# self._flag_a = True
# warnings.warn(f"'Extractor(engine=dpkt)' object is not iterable; "
# "so 'auto=False' will be ignored", AttributeWarning, stacklevel=stacklevel())
if self._exlyr != 'None' or self._exptl != 'null':
warnings.warn("'Extractor(engine=dpkt)' does not support protocol and layer threshold; "
f"'layer={self._exlyr}' and 'protocol={self._exptl}' ignored",
AttributeWarning, stacklevel=stacklevel())
# extract global header
self.record_header()
self._ifile.seek(0, os.SEEK_SET)
# extract & analyse file
self._expkg = dpkt
self._extmp = iter(dpkt.pcap.Reader(self._ifile))
# start iteration
self.record_frames()
|
python
|
{
"resource": ""
}
|
q1266
|
Extractor._run_pyshark
|
train
|
def _run_pyshark(self, pyshark):
"""Call pyshark.FileCapture to extract PCAP files."""
# if not self._flag_a:
# self._flag_a = True
# warnings.warn(f"'Extractor(engine=pyshark)' object is not iterable; "
# "so 'auto=False' will be ignored", AttributeWarning, stacklevel=stacklevel())
if self._exlyr != 'None' or self._exptl != 'null':
warnings.warn("'Extractor(engine=pyshark)' does not support protocol and layer threshold; "
f"'layer={self._exlyr}' and 'protocol={self._exptl}' ignored",
AttributeWarning, stacklevel=stacklevel())
if (self._ipv4 or self._ipv6 or self._tcp):
self._ipv4 = self._ipv6 = self._tcp = False
self._reasm = [None] * 3
warnings.warn("'Extractor(engine=pyshark)' object dose not support reassembly; "
f"so 'ipv4={self._ipv4}', 'ipv6={self._ipv6}' and 'tcp={self._tcp}' will be ignored",
AttributeWarning, stacklevel=stacklevel())
# extract & analyse file
self._expkg = pyshark
self._extmp = iter(pyshark.FileCapture(self._ifnm, keep_packets=False))
# start iteration
self.record_frames()
|
python
|
{
"resource": ""
}
|
q1267
|
Extractor._run_pipeline
|
train
|
def _run_pipeline(self, multiprocessing):
"""Use pipeline multiprocessing to extract PCAP files."""
if not self._flag_m:
raise UnsupportedCall(f"Extractor(engine={self._exeng})' has no attribute '_run_pipline'")
if not self._flag_q:
self._flag_q = True
warnings.warn("'Extractor(engine=pipeline)' does not support output; "
f"'fout={self._ofnm}' ignored", AttributeWarning, stacklevel=stacklevel())
self._frnum = 1 # frame number (revised)
self._expkg = multiprocessing # multiprocessing module
self._mpprc = list() # multiprocessing process list
self._mpfdp = collections.defaultdict(multiprocessing.Queue) # multiprocessing file pointer
self._mpmng = multiprocessing.Manager() # multiprocessing manager
self._mpkit = self._mpmng.Namespace() # multiprocessing work kit
self._mpkit.counter = 0 # work count (on duty)
self._mpkit.pool = 1 # work pool (ready)
self._mpkit.current = 1 # current frame number
self._mpkit.eof = False # EOF flag
self._mpkit.frames = dict() # frame storage
self._mpkit.trace = self._trace # flow tracer
self._mpkit.reassembly = copy.deepcopy(self._reasm) # reassembly buffers
# preparation
self.record_header()
self._mpfdp[0].put(self._gbhdr.length)
# extraction
while True:
# check EOF
if self._mpkit.eof:
self._update_eof()
break
# check counter
if self._mpkit.pool and self._mpkit.counter < CPU_CNT:
# update file offset
self._ifile.seek(self._mpfdp.pop(self._frnum-1).get(), os.SEEK_SET)
# create worker
# print(self._frnum, 'start')
proc = multiprocessing.Process(
target=self._pipeline_read_frame,
kwargs={'mpkit': self._mpkit, 'mpfdp': self._mpfdp[self._frnum]}
)
# update status
self._mpkit.pool -= 1
self._mpkit.counter += 1
# start and record
proc.start()
self._frnum += 1
self._mpprc.append(proc)
# check buffer
if len(self._mpprc) >= CPU_CNT:
[proc.join() for proc in self._mpprc[:-4]]
del self._mpprc[:-4]
|
python
|
{
"resource": ""
}
|
q1268
|
Extractor._run_server
|
train
|
def _run_server(self, multiprocessing):
"""Use server multiprocessing to extract PCAP files."""
if not self._flag_m:
raise UnsupportedCall(f"Extractor(engine={self._exeng})' has no attribute '_run_server'")
if not self._flag_q:
self._flag_q = True
warnings.warn("'Extractor(engine=pipeline)' does not support output; "
f"'fout={self._ofnm}' ignored", AttributeWarning, stacklevel=stacklevel())
self._frnum = 1 # frame number (revised)
self._expkg = multiprocessing # multiprocessing module
self._mpsvc = NotImplemented # multiprocessing server process
self._mpprc = list() # multiprocessing process list
self._mpfdp = collections.defaultdict(multiprocessing.Queue) # multiprocessing file pointer
self._mpmng = multiprocessing.Manager() # multiprocessing manager
self._mpbuf = self._mpmng.dict() # multiprocessing frame dict
self._mpfrm = self._mpmng.list() # multiprocessing frame storage
self._mprsm = self._mpmng.list() # multiprocessing reassembly buffer
self._mpkit = self._mpmng.Namespace() # multiprocessing work kit
self._mpkit.counter = 0 # work count (on duty)
self._mpkit.pool = 1 # work pool (ready)
self._mpkit.eof = False # EOF flag
self._mpkit.trace = None # flow tracer
# preparation
self.record_header()
self._mpfdp[0].put(self._gbhdr.length)
self._mpsvc = multiprocessing.Process(
target=self._server_analyse_frame,
kwargs={'mpfrm': self._mpfrm, 'mprsm': self._mprsm, 'mpbuf': self._mpbuf, 'mpkit': self._mpkit}
)
self._mpsvc.start()
# extraction
while True:
# check EOF
if self._mpkit.eof:
self._update_eof()
break
# check counter
if self._mpkit.pool and self._mpkit.counter < CPU_CNT - 1:
# update file offset
self._ifile.seek(self._mpfdp.pop(self._frnum-1).get(), os.SEEK_SET)
# create worker
# print(self._frnum, 'start')
proc = multiprocessing.Process(
target=self._server_extract_frame,
kwargs={'mpkit': self._mpkit, 'mpbuf': self._mpbuf, 'mpfdp': self._mpfdp[self._frnum]}
)
# update status
self._mpkit.pool -= 1
self._mpkit.counter += 1
# start and record
proc.start()
self._frnum += 1
self._mpprc.append(proc)
# check buffer
if len(self._mpprc) >= CPU_CNT - 1:
[proc.join() for proc in self._mpprc[:-4]]
del self._mpprc[:-4]
|
python
|
{
"resource": ""
}
|
q1269
|
Extractor._server_analyse_frame
|
train
|
def _server_analyse_frame(self, *, mpkit, mpfrm, mprsm, mpbuf):
"""Analyse frame."""
while True:
# fetch frame
# print(self._frnum, 'trying')
frame = mpbuf.pop(self._frnum, None)
if frame is EOFError:
break
if frame is None:
continue
# print(self._frnum, 'get')
self._default_read_frame(frame=frame)
mpfrm += self._frame
mprsm += self._reasm
mpkit.trace = copy.deepcopy(self._trace)
|
python
|
{
"resource": ""
}
|
q1270
|
HTTPv2.read_http
|
train
|
def read_http(self, length):
"""Read Hypertext Transfer Protocol version 2.
Structure of HTTP/2 packet [RFC 7230]:
+-----------------------------------------------+
| Length (24) |
+---------------+---------------+---------------+
| Type (8) | Flags (8) |
+-+-------------+---------------+-------------------------------+
|R| Stream Identifier (31) |
+=+=============================================================+
| Frame Payload (0...) ...
+---------------------------------------------------------------+
"""
_plen = self._read_binary(3)
_type = self._read_unpack(1)
_flag = self._read_binary(1)
_stid = self._read_binary(4)
|
python
|
{
"resource": ""
}
|
q1271
|
TraceFlow.make_fout
|
train
|
def make_fout(fout='./tmp', fmt='pcap'):
"""Make root path for output.
Positional arguments:
* fout -- str, root path for output
* fmt -- str, output format
Returns:
* output -- dumper of specified format
"""
if fmt == 'pcap': # output PCAP file
from pcapkit.dumpkit import PCAP as output
elif fmt == 'plist': # output PLIST file
from dictdumper import PLIST as output
elif fmt == 'json': # output JSON file
from dictdumper import JSON as output
elif fmt == 'tree': # output treeview text file
from dictdumper import Tree as output
fmt = 'txt'
elif fmt == 'html': # output JavaScript file
from dictdumper import JavaScript as output
fmt = 'js'
elif fmt == 'xml': # output XML file
from dictdumper import XML as output
else: # no output file
from pcapkit.dumpkit import NotImplementedIO as output
if fmt is not None:
warnings.warn(f'Unsupported output format: {fmt}; disabled file output feature',
FormatWarning, stacklevel=stacklevel())
return output, ''
try:
pathlib.Path(fout).mkdir(parents=True, exist_ok=True)
except FileExistsError as error:
if fmt is None:
warnings.warn(error.strerror, FileWarning, stacklevel=stacklevel())
else:
raise FileExists(*error.args) from None
return output, fmt
|
python
|
{
"resource": ""
}
|
q1272
|
TraceFlow.dump
|
train
|
def dump(self, packet):
"""Dump frame to output files.
Positional arguments:
* packet -- dict, a flow packet
|-- (str) protocol -- data link type from global header
|-- (int) index -- frame number
|-- (Info) frame -- extracted frame info
|-- (bool) syn -- TCP synchronise (SYN) flag
|-- (bool) fin -- TCP finish (FIN) flag
|-- (str) src -- source IP
|-- (int) srcport -- TCP source port
|-- (str) dst -- destination IP
|-- (int) dstport -- TCP destination port
|-- (numbers.Real) timestamp -- frame timestamp
"""
# fetch flow label
output = self.trace(packet, _check=False, _output=True)
# dump files
output(packet['frame'], name=f"Frame {packet['index']}",
byteorder=self._endian, nanosecond=self._nnsecd)
|
python
|
{
"resource": ""
}
|
q1273
|
TraceFlow.trace
|
train
|
def trace(self, packet, *, _check=True, _output=False):
"""Trace packets.
Positional arguments:
* packet -- dict, a flow packet
Keyword arguments:
* _check -- bool, flag if run validations
* _output -- bool, flag if has formatted dumper
"""
self._newflg = True
if _check:
pkt_check(packet)
info = Info(packet)
# Buffer Identifier
BUFID = tuple(sorted([str(info.src), str(info.srcport), # pylint: disable=E1101
str(info.dst), str(info.dstport)])) # pylint: disable=E1101
# SYN = info.syn # Synchronise Flag (Establishment)
# Finish Flag (Termination)
FIN = info.fin # pylint: disable=E1101
# # when SYN is set, reset buffer of this seesion
# if SYN and BUFID in self._buffer:
# temp = self._buffer.pop(BUFID)
# temp['fpout'] = (self._fproot, self._fdpext)
# temp['index'] = tuple(temp['index'])
# self._stream.append(Info(temp))
# initialise buffer with BUFID
if BUFID not in self._buffer:
label = f'{info.src}_{info.srcport}-{info.dst}_{info.dstport}-{info.timestamp}' # pylint: disable=E1101
self._buffer[BUFID] = dict(
fpout=self._foutio(f'{self._fproot}/{label}.{self._fdpext}',
protocol=info.protocol), # pylint: disable=E1101
index=list(),
label=label,
)
# trace frame record
self._buffer[BUFID]['index'].append(info.index) # pylint: disable=E1101
fpout = self._buffer[BUFID]['fpout']
label = self._buffer[BUFID]['label']
# when FIN is set, submit buffer of this session
if FIN:
buf = self._buffer.pop(BUFID)
# fpout, label = buf['fpout'], buf['label']
if self._fdpext:
buf['fpout'] = f'{self._fproot}/{label}.{self._fdpext}'
else:
del buf['fpout']
buf['index'] = tuple(buf['index'])
self._stream.append(Info(buf))
# return label or output object
return fpout if _output else label
|
python
|
{
"resource": ""
}
|
q1274
|
TraceFlow.submit
|
train
|
def submit(self):
"""Submit traced TCP flows."""
self._newflg = False
ret = list()
for buf in self._buffer.values():
buf = copy.deepcopy(buf)
if self._fdpext:
buf['fpout'] = f"{self._fproot}/{buf['label']}.{self._fdpext}"
else:
del buf['fpout']
buf['index'] = tuple(buf['index'])
ret.append(Info(buf))
ret += self._stream
return tuple(ret)
|
python
|
{
"resource": ""
}
|
q1275
|
AH.read_ah
|
train
|
def read_ah(self, length, version, extension):
"""Read Authentication Header.
Structure of AH header [RFC 4302]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Next Header | Payload Len | RESERVED |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Security Parameters Index (SPI) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Sequence Number Field |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ Integrity Check Value-ICV (variable) |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 ah.next Next Header
1 8 ah.length Payload Length
2 16 - Reserved (must be zero)
4 32 ah.spi Security Parameters Index (SPI)
8 64 ah.seq Sequence Number Field
12 96 ah.icv Integrity Check Value (ICV)
"""
if length is None:
length = len(self)
_next = self._read_protos(1)
_plen = self._read_unpack(1)
_resv = self._read_fileng(2)
_scpi = self._read_unpack(4)
_dsnf = self._read_unpack(4)
# ICV length & value
_tlen = _plen * 4 - 2
_vlen = _tlen - 12
_chkv = self._read_fileng(_vlen)
ah = dict(
next=_next,
length=_tlen,
spi=_scpi,
seq=_dsnf,
icv=_chkv,
)
if version == 6:
_plen = 8 - (_tlen % 8)
elif version == 4:
_plen = 4 - (_tlen % 4)
else:
raise VersionError(f'Unknown IP version {version}')
if _plen: # explicit padding in need
padding = self._read_binary(_plen)
if any((int(bit, base=2) for bit in padding)):
raise ProtocolError(f'{self.alias}: invalid format')
length -= ah['length']
ah['packet'] = self._read_packet(header=ah['length'], payload=length)
if extension:
self._protos = None
return ah
return self._decode_next_layer(ah, _next, length)
|
python
|
{
"resource": ""
}
|
q1276
|
Ethernet.read_ethernet
|
train
|
def read_ethernet(self, length):
"""Read Ethernet Protocol.
Structure of Ethernet Protocol header [RFC 7042]:
Octets Bits Name Description
0 0 eth.dst Destination MAC Address
1 8 eth.src Source MAC Address
2 16 eth.type Protocol (Internet Layer)
"""
if length is None:
length = len(self)
_dstm = self._read_mac_addr()
_srcm = self._read_mac_addr()
_type = self._read_protos(2)
ethernet = dict(
dst=_dstm,
src=_srcm,
type=_type,
)
length -= 14
ethernet['packet'] = self._read_packet(header=14, payload=length)
return self._decode_next_layer(ethernet, _type, length)
|
python
|
{
"resource": ""
}
|
q1277
|
Ethernet._read_mac_addr
|
train
|
def _read_mac_addr(self):
"""Read MAC address."""
_byte = self._read_fileng(6)
_addr = '-'.join(textwrap.wrap(_byte.hex(), 2))
return _addr
|
python
|
{
"resource": ""
}
|
q1278
|
packet2dict
|
train
|
def packet2dict(packet):
"""Convert PyShark packet into dict."""
dict_ = dict()
frame = packet.frame_info
for field in frame.field_names:
dict_[field] = getattr(frame, field)
tempdict = dict_
for layer in packet.layers:
tempdict[layer.layer_name.upper()] = dict()
tempdict = tempdict[layer.layer_name.upper()]
for field in layer.field_names:
tempdict[field] = getattr(layer, field)
return dict_
|
python
|
{
"resource": ""
}
|
q1279
|
packet2chain
|
train
|
def packet2chain(packet):
"""Fetch Scapy packet protocol chain."""
if scapy_all is None:
raise ModuleNotFound("No module named 'scapy'", name='scapy')
chain = [packet.name]
payload = packet.payload
while not isinstance(payload, scapy_all.packet.NoPayload):
chain.append(payload.name)
payload = payload.payload
return ':'.join(chain)
|
python
|
{
"resource": ""
}
|
q1280
|
packet2dict
|
train
|
def packet2dict(packet, *, count=NotImplemented):
"""Convert Scapy packet into dict."""
if scapy_all is None:
raise ModuleNotFound("No module named 'scapy'", name='scapy')
def wrapper(packet):
dict_ = packet.fields
payload = packet.payload
if not isinstance(payload, scapy_all.packet.NoPayload):
dict_[payload.name] = wrapper(payload)
return dict_
return {
'packet': bytes(packet),
packet.name: wrapper(packet),
}
|
python
|
{
"resource": ""
}
|
q1281
|
tcp_reassembly
|
train
|
def tcp_reassembly(packet, *, count=NotImplemented):
"""Store data for TCP reassembly."""
if 'TCP' in packet:
ip = packet['IP'] if 'IP' in packet else packet['IPv6']
tcp = packet['TCP']
data = dict(
bufid=(
ipaddress.ip_address(ip.src), # source IP address
ipaddress.ip_address(ip.dst), # destination IP address
tcp.sport, # source port
tcp.dport, # destination port
),
num=count, # original packet range number
ack=tcp.ack, # acknowledgement
dsn=tcp.seq, # data sequence number
syn=bool(tcp.flags.S), # synchronise flag
fin=bool(tcp.flags.F), # finish flag
rst=bool(tcp.flags.R), # reset connection flag
payload=bytearray(bytes(tcp.payload)), # raw bytearray type payload
)
raw_len = len(tcp.payload) # payload length, header excludes
data['first'] = tcp.seq # this sequence number
data['last'] = tcp.seq + raw_len # next (wanted) sequence number
data['len'] = raw_len # payload length, header excludes
return True, data
return False, None
|
python
|
{
"resource": ""
}
|
q1282
|
HOPOPT.read_hopopt
|
train
|
def read_hopopt(self, length, extension):
"""Read IPv6 Hop-by-Hop Options.
Structure of HOPOPT header [RFC 8200]:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Next Header | Hdr Ext Len | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +
| |
. .
. Options .
. .
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.next Next Header
1 8 hopopt.length Header Extensive Length
2 16 hopopt.options Options
"""
if length is None:
length = len(self)
_next = self._read_protos(1)
_hlen = self._read_unpack(1)
# _opts = self._read_fileng(_hlen*8+6)
hopopt = dict(
next=_next,
length=(_hlen + 1) * 8,
)
options = self._read_hopopt_options(_hlen * 8 + 6)
hopopt['options'] = options[0] # tuple of option acronyms
hopopt.update(options[1]) # merge option info to buffer
length -= hopopt['length']
hopopt['packet'] = self._read_packet(header=hopopt['length'], payload=length)
if extension:
self._protos = None
return hopopt
return self._decode_next_layer(hopopt, _next, length)
|
python
|
{
"resource": ""
}
|
q1283
|
HOPOPT._read_hopopt_options
|
train
|
def _read_hopopt_options(self, length):
"""Read HOPOPT options.
Positional arguments:
* length -- int, length of options
Returns:
* dict -- extracted HOPOPT options
"""
counter = 0 # length of read options
optkind = list() # option type list
options = dict() # dict of option data
while counter < length:
# break when eol triggered
code = self._read_unpack(1)
if not code:
break
# extract parameter
abbr, desc = _HOPOPT_OPT.get(code, ('none', 'Unassigned'))
data = _HOPOPT_PROC(abbr)(self, code, desc=desc)
enum = _OPT_TYPE.get(code)
# record parameter data
counter += data['length']
if enum in optkind:
if isinstance(options[abbr], tuple):
options[abbr] += (Info(data),)
else:
options[abbr] = (Info(options[abbr]), Info(data))
else:
optkind.append(enum)
options[abbr] = data
# check threshold
if counter != length:
raise ProtocolError(f'{self.alias}: invalid format')
return tuple(optkind), options
|
python
|
{
"resource": ""
}
|
q1284
|
HOPOPT._read_opt_pad
|
train
|
def _read_opt_pad(self, code, *, desc):
"""Read HOPOPT padding options.
Structure of HOPOPT padding options [RFC 8200]:
* Pad1 Option:
+-+-+-+-+-+-+-+-+
| 0 |
+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.pad.type Option Type
0 0 hopopt.pad.type.value Option Number
0 0 hopopt.pad.type.action Action (00)
0 2 hopopt.pad.type.change Change Flag (0)
* PadN Option:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- - - - - - - - -
| 1 | Opt Data Len | Option Data
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- - - - - - - - -
Octets Bits Name Description
0 0 hopopt.pad.type Option Type
0 0 hopopt.pad.type.value Option Number
0 0 hopopt.pad.type.action Action (00)
0 2 hopopt.pad.type.change Change Flag (0)
1 8 hopopt.opt.length Length of Option Data
2 16 hopopt.pad.padding Padding
"""
_type = self._read_opt_type(code)
if code == 0:
opt = dict(
desc=desc,
type=_type,
length=1,
)
elif code == 1:
_size = self._read_unpack(1)
_padn = self._read_fileng(_size)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
padding=_padn,
)
else:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
return opt
|
python
|
{
"resource": ""
}
|
q1285
|
HOPOPT._read_opt_tun
|
train
|
def _read_opt_tun(self, code, *, desc):
"""Read HOPOPT Tunnel Encapsulation Limit option.
Structure of HOPOPT Tunnel Encapsulation Limit option [RFC 2473]:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Next Header |Hdr Ext Len = 0| Opt Type = 4 |Opt Data Len=1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Tun Encap Lim |PadN Opt Type=1|Opt Data Len=1 | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.tun.type Option Type
0 0 hopopt.tun.type.value Option Number
0 0 hopopt.tun.type.action Action (00)
0 2 hopopt.tun.type.change Change Flag (0)
1 8 hopopt.tun.length Length of Option Data
2 16 hopopt.tun.limit Tunnel Encapsulation Limit
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
if _size != 1:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_limt = self._read_unpack(1)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
limit=_limt,
)
return opt
|
python
|
{
"resource": ""
}
|
q1286
|
HOPOPT._read_opt_ra
|
train
|
def _read_opt_ra(self, code, *, desc):
"""Read HOPOPT Router Alert option.
Structure of HOPOPT Router Alert option [RFC 2711]:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 0|0 0 1 0 1|0 0 0 0 0 0 1 0| Value (2 octets) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.ra.type Option Type
0 0 hopopt.ra.type.value Option Number
0 0 hopopt.ra.type.action Action (00)
0 2 hopopt.ra.type.change Change Flag (0)
1 8 hopopt.opt.length Length of Option Data
2 16 hopopt.ra.value Value
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
if _size != 2:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_rval = self._read_unpack(2)
if 4 <= _rval <= 35:
_dscp = f'Aggregated Reservation Nesting Level {_rval-4}' # [RFC 3175]
elif 36 <= _rval <= 67:
_dscp = f'QoS NSLP Aggregation Level {_rval-36}' # [RFC 5974]
elif 65503 <= _rval <= 65534:
_dscp = 'Reserved for experimental use' # [RFC 5350]
else:
_dscp = _ROUTER_ALERT.get(_rval, 'Unassigned')
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
value=_rval,
alert=_dscp,
)
return opt
|
python
|
{
"resource": ""
}
|
q1287
|
HOPOPT._read_opt_calipso
|
train
|
def _read_opt_calipso(self, code, *, desc):
"""Read HOPOPT CALIPSO option.
Structure of HOPOPT CALIPSO option [RFC 5570]:
------------------------------------------------------------
| Next Header | Hdr Ext Len | Option Type | Option Length|
+-------------+---------------+-------------+--------------+
| CALIPSO Domain of Interpretation |
+-------------+---------------+-------------+--------------+
| Cmpt Length | Sens Level | Checksum (CRC-16) |
+-------------+---------------+-------------+--------------+
| Compartment Bitmap (Optional; variable length) |
+-------------+---------------+-------------+--------------+
Octets Bits Name Description
0 0 hopopt.calipso.type Option Type
0 0 hopopt.calipso.type.value Option Number
0 0 hopopt.calipso.type.action Action (00)
0 2 hopopt.calipso.type.change Change Flag (0)
1 8 hopopt.calipso.length Length of Option Data
2 16 hopopt.calipso.domain CALIPSO Domain of Interpretation
6 48 hopopt.calipso.cmpt_len Cmpt Length
7 56 hopopt.calipso.level Sens Level
8 64 hopopt.calipso.chksum Checksum (CRC-16)
9 72 hopopt.calipso.bitmap Compartment Bitmap
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
if _size < 8 and _size % 8 != 0:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_cmpt = self._read_unpack(4)
_clen = self._read_unpack(1)
if _clen % 2 != 0:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_sens = self._read_unpack(1)
_csum = self._read_fileng(2)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
domain=_cmpt,
cmpt_len=_clen * 4,
level=_sens,
chksum=_csum,
)
if _clen:
_bmap = list()
for _ in range(_clen // 2):
_bmap.append(self._read_binary(8))
opt['bitmap'] = tuple(_bmap)
_plen = _size - _clen * 4 - 8
if _plen:
self._read_fileng(_plen)
return opt
|
python
|
{
"resource": ""
}
|
q1288
|
HOPOPT._read_opt_smf_dpd
|
train
|
def _read_opt_smf_dpd(self, code, *, desc):
"""Read HOPOPT SMF_DPD option.
Structure of HOPOPT SMF_DPD option [RFC 5570]:
* IPv6 SMF_DPD Option Header in I-DPD mode
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
... |0|0|0| 01000 | Opt. Data Len |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0|TidTy| TidLen| TaggerId (optional) ... |
+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | Identifier ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.smf_dpd.type Option Type
0 0 hopopt.smf_dpd.type.value Option Number
0 0 hopopt.smf_dpd.type.action Action (00)
0 2 hopopt.smf_dpd.type.change Change Flag (0)
1 8 hopopt.smf_dpd.length Length of Option Data
2 16 hopopt.smf_dpd.dpd_type DPD Type (0)
2 17 hopopt.smf_dpd.tid_type TaggerID Type
2 20 hopopt.smf_dpd.tid_len TaggerID Length
3 24 hopopt.smf_dpd.tid TaggerID
? ? hopopt.smf_dpd.id Identifier
* IPv6 SMF_DPD Option Header in H-DPD Mode
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
... |0|0|0| OptType | Opt. Data Len |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|1| Hash Assist Value (HAV) ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.smf_dpd.type Option Type
0 0 hopopt.smf_dpd.type.value Option Number
0 0 hopopt.smf_dpd.type.action Action (00)
0 2 hopopt.smf_dpd.type.change Change Flag (0)
1 8 hopopt.smf_dpd.length Length of Option Data
2 16 hopopt.smf_dpd.dpd_type DPD Type (1)
2 17 hopopt.smf_dpd.hav Hash Assist Value
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
_tidd = self._read_binary(1)
if _tidd[0] == '0':
_mode = 'I-DPD'
_tidt = _TID_TYPE.get(_tidd[1:4], 'Unassigned')
_tidl = int(_tidd[4:], base=2)
if _tidt == 'NULL':
if _tidl != 0:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_iden = self._read_fileng(_size-1)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
dpd_type=_mode,
tid_type=_tidt,
tid_len=_tidl,
id=_iden,
)
elif _tidt == 'IPv4':
if _tidl != 3:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_tidf = self._read_fileng(4)
_iden = self._read_fileng(_size-4)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
dpd_type=_mode,
tid_type=_tidt,
tid_len=_tidl,
tid=ipaddress.ip_address(_tidf),
id=_iden,
)
elif _tidt == 'IPv6':
if _tidl != 15:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_tidf = self._read_fileng(15)
_iden = self._read_fileng(_size-15)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
dpd_type=_mode,
tid_type=_tidt,
tid_len=_tidl,
tid=ipaddress.ip_address(_tidf),
id=_iden,
)
else:
_tidf = self._read_unpack(_tidl+1)
_iden = self._read_fileng(_size-_tidl-2)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
dpd_type=_mode,
tid_type=_tidt,
tid_len=_tidl,
tid=_tidf,
id=_iden,
)
elif _tidd[0] == '1':
_data = self._read_binary(_size-1)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
dpd_type=_mode,
tid_type=_tidt,
hav=_tidd[1:] + _data,
)
else:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
return opt
|
python
|
{
"resource": ""
}
|
q1289
|
HOPOPT._read_opt_pdm
|
train
|
def _read_opt_pdm(self, code, *, desc):
"""Read HOPOPT PDM option.
Structure of HOPOPT PDM option [RFC 8250]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Option Type | Option Length | ScaleDTLR | ScaleDTLS |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PSN This Packet | PSN Last Received |
|-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Delta Time Last Received | Delta Time Last Sent |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.pdm.type Option Type
0 0 hopopt.pdm.type.value Option Number
0 0 hopopt.pdm.type.action Action (00)
0 2 hopopt.pdm.type.change Change Flag (0)
1 8 hopopt.pdm.length Length of Option Data
2 16 hopopt.pdm.scaledtlr Scale Delta Time Last Received
3 24 hopopt.pdm.scaledtls Scale Delta Time Last Sent
4 32 hopopt.pdm.psntp Packet Sequence Number This Packet
6 48 hopopt.pdm.psnlr Packet Sequence Number Last Received
8 64 hopopt.pdm.deltatlr Delta Time Last Received
10 80 hopopt.pdm.deltatls Delta Time Last Sent
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
if _size != 10:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_stlr = self._read_unpack(1)
_stls = self._read_unpack(1)
_psnt = self._read_unpack(2)
_psnl = self._read_unpack(2)
_dtlr = self._read_unpack(2)
_dtls = self._read_unpack(2)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
scaledtlr=datetime.timedelta(seconds=_stlr),
scaledtls=datetime.timedelta(seconds=_stls),
psntp=_psnt,
psnlr=_psnl,
deltatlr=datetime.timedelta(seconds=_dtlr),
deltatls=datetime.timedelta(seconds=_dtls),
)
return opt
|
python
|
{
"resource": ""
}
|
q1290
|
HOPOPT._read_opt_qs
|
train
|
def _read_opt_qs(self, code, *, desc):
"""Read HOPOPT Quick Start option.
Structure of HOPOPT Quick-Start option [RFC 4782]:
* A Quick-Start Request.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Option | Length=6 | Func. | Rate | QS TTL |
| | | 0000 |Request| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| QS Nonce | R |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* Report of Approved Rate.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Option | Length=6 | Func. | Rate | Not Used |
| | | 1000 | Report| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| QS Nonce | R |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.qs.type Option Type
0 0 hopopt.qs.type.value Option Number
0 0 hopopt.qs.type.action Action (00)
0 2 hopopt.qs.type.change Change Flag (1)
1 8 hopopt.qs.length Length of Option Data
2 16 hopopt.qs.func Function (0/8)
2 20 hopopt.qs.rate Rate Request / Report (in Kbps)
3 24 hopopt.qs.ttl QS TTL / None
4 32 hopopt.qs.nounce QS Nounce
7 62 - Reserved
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
if _size != 6:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_fcrr = self._read_binary(1)
_func = int(_fcrr[:4], base=2)
_rate = int(_fcrr[4:], base=2)
_ttlv = self._read_unpack(1)
_nonr = self._read_binary(4)
_qsnn = int(_nonr[:30], base=2)
if _func != 0 and _func != 8:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
data = dict(
type=_type,
length=_size + 2,
func=_QS_FUNC.get(_func),
rate=40000 * (2 ** _rate) / 1000,
ttl=None if _func else _rate,
nounce=_qsnn,
)
return data
|
python
|
{
"resource": ""
}
|
q1291
|
HOPOPT._read_opt_rpl
|
train
|
def _read_opt_rpl(self, code, *, desc):
"""Read HOPOPT RPL option.
Structure of HOPOPT RPL option [RFC 6553]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Option Type | Opt Data Len |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|O|R|F|0|0|0|0|0| RPLInstanceID | SenderRank |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| (sub-TLVs) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.rpl.type Option Type
0 0 hopopt.rpl.type.value Option Number
0 0 hopopt.rpl.type.action Action (01)
0 2 hopopt.rpl.type.change Change Flag (1)
1 8 hopopt.rpl.length Length of Option Data
2 16 hopopt.rpl.flags RPL Option Flags
2 16 hopopt.rpl.flags.down Down Flag
2 17 hopopt.rpl.flags.rank_error Rank-Error Flag
2 18 hopopt.rpl.flags.fwd_error Forwarding-Error Flag
3 24 hopopt.rpl.id RPLInstanceID
4 32 hopopt.rpl.rank SenderRank
6 48 hopopt.rpl.data Sub-TLVs
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
if _size < 4:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_flag = self._read_binary(1)
_rpld = self._read_unpack(1)
_rank = self._read_unpack(2)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
flags=dict(
down=True if int(_flag[0], base=2) else False,
rank_error=True if int(_flag[1], base=2) else False,
fwd_error=True if int(_flag[2], base=2) else False,
),
id=_rpld,
rank=_rank,
)
if _size > 4:
opt['data'] = self._read_fileng(_size-4)
return opt
|
python
|
{
"resource": ""
}
|
q1292
|
HOPOPT._read_opt_ilnp
|
train
|
def _read_opt_ilnp(self, code, *, desc):
"""Read HOPOPT ILNP Nonce option.
Structure of HOPOPT ILNP Nonce option [RFC 6744]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Next Header | Hdr Ext Len | Option Type | Option Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/ Nonce Value /
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.ilnp.type Option Type
0 0 hopopt.ilnp.type.value Option Number
0 0 hopopt.ilnp.type.action Action (10)
0 2 hopopt.ilnp.type.change Change Flag (0)
1 8 hopopt.ilnp.length Length of Option Data
2 16 hopopt.ilnp.value Nonce Value
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
_nval = self._read_fileng(_size)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
value=_nval,
)
return opt
|
python
|
{
"resource": ""
}
|
q1293
|
HOPOPT._read_opt_lio
|
train
|
def _read_opt_lio(self, code, *, desc):
"""Read HOPOPT Line-Identification option.
Structure of HOPOPT Line-Identification option [RFC 6788]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Option Type | Option Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| LineIDLen | Line ID...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.lio.type Option Type
0 0 hopopt.lio.type.value Option Number
0 0 hopopt.lio.type.action Action (10)
0 2 hopopt.lio.type.change Change Flag (0)
1 8 hopopt.lio.length Length of Option Data
2 16 hopopt.lio.lid_len Line ID Length
3 24 hopopt.lio.lid Line ID
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
_llen = self._read_unpack(1)
_line = self._read_fileng(_llen)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
lid_len=_llen,
lid=_line,
)
_plen = _size - _llen
if _plen:
self._read_fileng(_plen)
return opt
|
python
|
{
"resource": ""
}
|
q1294
|
HOPOPT._read_opt_jumbo
|
train
|
def _read_opt_jumbo(self, code, *, desc):
"""Read HOPOPT Jumbo Payload option.
Structure of HOPOPT Jumbo Payload option [RFC 2675]:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Option Type | Opt Data Len |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Jumbo Payload Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.jumbo.type Option Type
0 0 hopopt.jumbo.type.value Option Number
0 0 hopopt.jumbo.type.action Action (11)
0 2 hopopt.jumbo.type.change Change Flag (0)
1 8 hopopt.jumbo.length Length of Option Data
2 16 hopopt.jumbo.payload_len Jumbo Payload Length
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
if _size != 4:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_jlen = self._read_unpack(4)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
payload_len=_jlen,
)
return opt
|
python
|
{
"resource": ""
}
|
q1295
|
HOPOPT._read_opt_home
|
train
|
def _read_opt_home(self, code, *, desc):
"""Read HOPOPT Home Address option.
Structure of HOPOPT Home Address option [RFC 6275]:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Option Type | Option Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ +
| |
+ Home Address +
| |
+ +
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.home.type Option Type
0 0 hopopt.home.type.value Option Number
0 0 hopopt.home.type.action Action (11)
0 2 hopopt.home.type.change Change Flag (0)
1 8 hopopt.home.length Length of Option Data
2 16 hopopt.home.ip Home Address
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
if _size != 16:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_addr = self._read_fileng(16)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
ip=ipaddress.ip_address(_addr),
)
return opt
|
python
|
{
"resource": ""
}
|
q1296
|
HOPOPT._read_opt_ip_dff
|
train
|
def _read_opt_ip_dff(self, code, *, desc):
"""Read HOPOPT IP_DFF option.
Structure of HOPOPT IP_DFF option [RFC 6971]:
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Next Header | Hdr Ext Len | OptTypeDFF | OptDataLenDFF |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|VER|D|R|0|0|0|0| Sequence Number | Pad1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 hopopt.ip_dff.type Option Type
0 0 hopopt.ip_dff.type.value Option Number
0 0 hopopt.ip_dff.type.action Action (11)
0 2 hopopt.ip_dff.type.change Change Flag (1)
1 8 hopopt.ip_dff.length Length of Option Data
2 16 hopopt.ip_dff.version Version
2 18 hopopt.ip_dff.flags Flags
2 18 hopopt.ip_dff.flags.dup DUP Flag
2 19 hopopt.ip_dff.flags.ret RET Flag
2 20 - Reserved
3 24 hopopt.ip_dff.seq Sequence Number
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
if _size != 2:
raise ProtocolError(f'{self.alias}: [Optno {code}] invalid format')
_verf = self._read_binary(1)
_seqn = self._read_unpack(2)
opt = dict(
desc=desc,
type=_type,
length=_size + 2,
version=_verf[:2],
flags=dict(
dup=True if int(_verf[2], base=2) else False,
ret=True if int(_verf[3], base=2) else False,
),
seq=_seqn,
)
return opt
|
python
|
{
"resource": ""
}
|
q1297
|
IPv6_Opts.read_ipv6_opts
|
train
|
def read_ipv6_opts(self, length, extension):
"""Read Destination Options for IPv6.
Structure of IPv6-Opts header [RFC 8200]:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Next Header | Hdr Ext Len | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +
| |
. .
. Options .
. .
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Octets Bits Name Description
0 0 opt.next Next Header
1 8 opt.length Header Extensive Length
2 16 opt.options Options
"""
if length is None:
length = len(self)
_next = self._read_protos(1)
_hlen = self._read_unpack(1)
# _opts = self._read_fileng(_hlen*8+6)
ipv6_opts = dict(
next=_next,
length=(_hlen + 1) * 8,
)
options = self._read_ipv6_opts_options(_hlen * 8 + 6)
ipv6_opts['options'] = options[0] # tuple of option acronyms
ipv6_opts.update(options[1]) # merge option info to buffer
length -= ipv6_opts['length']
ipv6_opts['packet'] = self._read_packet(header=ipv6_opts['length'], payload=length)
if extension:
self._protos = None
return ipv6_opts
return self._decode_next_layer(ipv6_opts, _next, length)
|
python
|
{
"resource": ""
}
|
q1298
|
IPv6_Opts._read_ipv6_opts_options
|
train
|
def _read_ipv6_opts_options(self, length):
"""Read IPv6_Opts options.
Positional arguments:
* length -- int, length of options
Returns:
* dict -- extracted IPv6_Opts options
"""
counter = 0 # length of read options
optkind = list() # option type list
options = dict() # dict of option data
while counter < length:
# break when eol triggered
code = self._read_unpack(1)
if not code:
break
# extract parameter
abbr, desc = _IPv6_Opts_OPT.get(code, ('None', 'Unassigned'))
data = _IPv6_Opts_PROC(abbr)(self, code, desc=desc)
enum = _OPT_TYPE.get(code)
# record parameter data
counter += data['length']
if enum in optkind:
if isinstance(options[abbr], tuple):
options[abbr] += (Info(data),)
else:
options[abbr] = (Info(options[abbr]), Info(data))
else:
optkind.append(enum)
options[abbr] = data
# check threshold
if counter != length:
raise ProtocolError(f'{self.alias}: invalid format')
return tuple(optkind), options
|
python
|
{
"resource": ""
}
|
q1299
|
IPv6_Opts._read_opt_none
|
train
|
def _read_opt_none(self, code, *, desc):
"""Read IPv6_Opts unassigned options.
Structure of IPv6_Opts unassigned options [RFC 8200]:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- - - - - - - - -
| Option Type | Opt Data Len | Option Data
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- - - - - - - - -
Octets Bits Name Description
0 0 ipv6_opts.opt.type Option Type
0 0 ipv6_opts.opt.type.value Option Number
0 0 ipv6_opts.opt.type.action Action (00-11)
0 2 ipv6_opts.opt.type.change Change Flag (0/1)
1 8 ipv6_opts.opt.length Length of Option Data
2 16 ipv6_opts.opt.data Option Data
"""
_type = self._read_opt_type(code)
_size = self._read_unpack(1)
_data = self._read_fileng(_size)
opt = dict(
desc=_IPv6_Opts_NULL.get(code, desc),
type=_type,
length=_size + 2,
data=_data,
)
return opt
|
python
|
{
"resource": ""
}
|
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