/usr/lib/python2.7/dist-packages/rekall/plugins/linux/arp.py is in python-rekall-core 1.6.0+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | # Rekall Memory Forensics
#
# Copyright 2013 Google Inc. All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
@author: Andrew Case
@license: GNU General Public License 2.0 or later
@contact: atcuno@gmail.com
@organization: Digital Forensics Solutions
"""
from rekall import obj
from rekall.plugins.linux import common
arp_overlay = {
'neigh_table': [None, {
# From /include/linux/socket.h
'family': [None, ['Enumeration', dict(
choices={
0: "AF_UNSPEC",
1: "AF_UNIX",
2: "AF_INET",
10: "AF_INET6",
},
target="unsigned int",
)]]
}],
'neighbour': [None, {
"ha": [None, ["Array", dict(
target="byte",
count=lambda x: x.dev.addr_len)]],
}],
}
class ArpModification(obj.ProfileModification):
@classmethod
def modify(cls, profile):
profile.add_overlay(arp_overlay)
class Arp(common.LinuxPlugin):
"""print the ARP table."""
# This plugin seems broken now.
__name = "arp"
table_header = [
dict(name="ip", width=45, align="r"),
dict(name="mac", width=20, align="r"),
dict(name="dev", width=15, align="r")
]
def __init__(self, **kwargs):
super(Arp, self).__init__(**kwargs)
self.profile = ArpModification(self.profile)
def get_handle_tables(self):
# In earlier Linux neigh_table is a linked list.
if self.session.profile.neigh_table().m("next") != None:
tables = self.profile.get_constant_object(
"neigh_tables",
target="Pointer",
target_args=dict(
target="neigh_table"
)
)
for table in tables.walk_list("next"):
for x in self.handle_table(table):
yield x
# But since 3.19 it is an array of pointers to neigh_tables.
# http://lxr.free-electrons.com/source/net/core/neighbour.c?v=3.19#L1517
# static struct neigh_table *neigh_tables[NEIGH_NR_TABLES]
# NEIGH_NR_TABLES is in an enum and it is 3.
else:
tables = self.profile.get_constant_object(
"neigh_tables",
target="Array",
target_args=dict(
target="Pointer",
count=3,
target_args=dict(
target="neigh_table"
)
)
)
for table in tables:
for x in self.handle_table(table):
yield x
def handle_table(self, ntable):
# Support a few ways of finding these parameters depending on kernel
# versions.
hash_size = (ntable.m("hash_mask") or
ntable.nht.m("hash_mask") or
1 << ntable.nht.hash_shift)
hash_table = ntable.m("hash_buckets") or ntable.nht.hash_buckets
buckets = self.profile.Array(offset=hash_table,
vm=self.kernel_address_space,
target='Pointer', count=hash_size,
target_args=dict(target="neighbour"))
for neighbour in buckets:
if neighbour:
for x in self.walk_neighbour(neighbour.deref()):
yield x
def walk_neighbour(self, neighbour):
while 1:
# get the family from each neighbour in order to work with IPv4 and
# IPv6.
family = neighbour.tbl.family
if family == "AF_INET":
ip = neighbour.primary_key.cast("Ipv4Address")
elif family == "AF_INET6":
ip = neighbour.primary_key.cast("Ipv6Address")
else:
ip = '?'
mac = ":".join(["%.02x" % x for x in neighbour.ha])
devname = neighbour.dev.name
yield dict(ip=ip, mac=mac, dev=devname)
neighbour = neighbour.next.deref()
if not neighbour:
break
def collect(self):
for x in self.get_handle_tables():
yield x
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