1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
## This file is part of Scapy
## See http://www.secdev.org/projects/scapy for more informations
## Copyright (C) Philippe Biondi <phil@secdev.org>
## This program is published under a GPLv2 license
"""
PFLog: OpenBSD PF packet filter logging.
"""
from scapy.packet import *
from scapy.fields import *
from scapy.layers.inet import IP
if conf.ipv6_enabled:
from scapy.layers.inet6 import IPv6
from scapy.config import conf
class PFLog(Packet):
name = "PFLog"
# from OpenBSD src/sys/net/pfvar.h and src/sys/net/if_pflog.h
fields_desc = [ ByteField("hdrlen", 0),
ByteEnumField("addrfamily", 2, {socket.AF_INET: "IPv4",
socket.AF_INET6: "IPv6"}),
ByteEnumField("action", 1, {0: "pass", 1: "drop",
2: "scrub", 3: "no-scrub",
4: "nat", 5: "no-nat",
6: "binat", 7: "no-binat",
8: "rdr", 9: "no-rdr",
10: "syn-proxy-drop" }),
ByteEnumField("reason", 0, {0: "match", 1: "bad-offset",
2: "fragment", 3: "short",
4: "normalize", 5: "memory",
6: "bad-timestamp",
7: "congestion",
8: "ip-options",
9: "proto-cksum",
10: "state-mismatch",
11: "state-insert",
12: "state-limit",
13: "src-limit",
14: "syn-proxy" }),
StrFixedLenField("iface", "", 16),
StrFixedLenField("ruleset", "", 16),
SignedIntField("rulenumber", 0),
SignedIntField("subrulenumber", 0),
SignedIntField("uid", 0),
IntField("pid", 0),
SignedIntField("ruleuid", 0),
IntField("rulepid", 0),
ByteEnumField("direction", 255, {0: "inout", 1: "in",
2:"out", 255: "unknown"}),
StrFixedLenField("pad", "\x00\x00\x00", 3 ) ]
def mysummary(self):
return self.sprintf("%PFLog.addrfamily% %PFLog.action% on %PFLog.iface% by rule %PFLog.rulenumber%")
bind_layers(PFLog, IP, addrfamily=socket.AF_INET)
if conf.ipv6_enabled:
bind_layers(PFLog, IPv6, addrfamily=socket.AF_INET6)
conf.l2types.register(117, PFLog)
|
