mirror of
https://github.com/volatilityfoundation/volatility
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iMHLv2
88 lines
2.7 KiB
Python
88 lines
2.7 KiB
Python
# Volatility
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# Copyright (C) 2007-2013 Volatility Foundation
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#
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# This file is part of Volatility.
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#
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# Volatility is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# Volatility is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Volatility. If not, see <http://www.gnu.org/licenses/>.
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#
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"""
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@author: Andrew Case
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@license: GNU General Public License 2.0
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@contact: atcuno@gmail.com
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@organization:
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"""
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import os
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import volatility.debug as debug
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import volatility.plugins.linux.common as linux_common
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from volatility.plugins.linux.slab_info import linux_slabinfo
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class linux_sk_buff_cache(linux_common.AbstractLinuxCommand):
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"""Recovers packets from the sk_buff kmem_cache"""
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def __init__(self, config, *args, **kwargs):
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self.edir = None
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linux_common.AbstractLinuxCommand.__init__(self, config, *args, **kwargs)
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self._config.add_option('UNALLOCATED', short_option = 'u', default = False, help = 'Show unallocated', action = 'store_true')
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self._config.add_option('DUMP-DIR', short_option = 'D', default = None, help = 'output directory for recovered packets', action = 'store', type = 'str')
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def write_sk_buff(self, s):
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pkt_len = s.len
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# keep sane sized packets
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if 0 < pkt_len < 0x6400000:
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start = s.data
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data = self.addr_space.zread(start, pkt_len)
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fname = "{0:x}".format(s.obj_offset)
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fd = open(os.path.join(self.edir, fname), "wb")
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fd.write(data)
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fd.close()
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yield "Wrote {0:d} bytes to {1:s}".format(pkt_len, fname)
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def walk_cache(self, cache_name):
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cache = linux_slabinfo(self._config).get_kmem_cache(cache_name, self._config.UNALLOCATED, struct_name = "sk_buff")
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if not cache:
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return
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for s in cache:
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for msg in self.write_sk_buff(s):
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yield msg
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def calculate(self):
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linux_common.set_plugin_members(self)
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self.edir = self._config.DUMP_DIR
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if not self.edir:
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debug.error("No output directory given.")
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for msg in self.walk_cache("skbuff_head_cache"):
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yield msg
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for msg in self.walk_cache("skbuff_fclone_cache"):
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yield msg
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def render_text(self, outfd, data):
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for msg in data:
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outfd.write("{0:s}\n".format(msg))
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