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wireshark/packet-sebek.c

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/* packet-sebek.c
* Routines for Sebek - Kernel based data capture - packet dissection
* Copyright 1999, Nathan Neulinger <nneul@umr.edu>
*
* See: http://project.honeynet.org/tools/sebek/ for more details
*
* $Id: packet-sebek.c,v 1.1 2003/11/19 22:13:29 nneul Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <math.h>
#include <glib.h>
#ifdef NEED_SNPRINTF_H
# include "snprintf.h"
#endif
#include <epan/packet.h>
#include <epan/resolv.h>
/*
IP address: 32bit unsigned
MAGIC Val: 32bit unsigned
Sebek Ver: 16bit unsigned
Type 16bit unsigned
Counter: 32bit unsigned
Time_sec: 32bit unsigned
Time_usec: 32bit unsigned
Proc ID: 32bit unsigned
User ID: 32bit unsigned
File Desc: 32bit unsigned
Command: 12char array
Length: Data Length
Data: Variable Length data
*
*/
/* By default, but can be completely different */
#define UDP_PORT_SEBEK 1101
static int proto_sebek = -1;
static int hf_sebek_magic = -1;
static int hf_sebek_version = -1;
static int hf_sebek_type = -1;
static int hf_sebek_counter = -1;
static int hf_sebek_time = -1;
static int hf_sebek_pid = -1;
static int hf_sebek_uid = -1;
static int hf_sebek_fd = -1;
static int hf_sebek_cmd = -1;
static int hf_sebek_len = -1;
static int hf_sebek_data = -1;
static gint ett_sebek = -1;
/* dissect_sebek - dissects sebek packet data
* tvb - tvbuff for packet data (IN)
* pinfo - packet info
* proto_tree - resolved protocol tree
*/
static void
dissect_sebek(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *sebek_tree;
proto_item *ti;
int offset = 0;
int datalen = 0;
nstime_t ts;
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SEBEK");
if (check_col(pinfo->cinfo, COL_INFO))
{
col_clear(pinfo->cinfo, COL_INFO);
col_set_str(pinfo->cinfo, COL_INFO, "SEBEK - ");
col_append_fstr(pinfo->cinfo, COL_INFO, " pid(%d)", tvb_get_ntohl(tvb, 20));
col_append_fstr(pinfo->cinfo, COL_INFO, " uid(%d)", tvb_get_ntohl(tvb, 24));
col_append_fstr(pinfo->cinfo, COL_INFO, " fd(%d)", tvb_get_ntohl(tvb, 28));
col_append_fstr(pinfo->cinfo, COL_INFO, " cmd: %s", tvb_get_string(tvb, 32, 12));
}
if (tree) {
/* Adding NTP item and subtree */
ti = proto_tree_add_item(tree, proto_sebek, tvb, 0, -1, FALSE);
sebek_tree = proto_item_add_subtree(ti, ett_sebek);
proto_tree_add_item(sebek_tree, hf_sebek_magic, tvb, offset, 4, FALSE);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_version, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_type, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_counter, tvb, offset, 4, FALSE);
offset += 4;
ts.secs = tvb_get_ntohl(tvb, offset);
ts.nsecs = tvb_get_ntohl(tvb, offset+4);
proto_tree_add_time(sebek_tree, hf_sebek_time, tvb, offset, 8, &ts);
offset += 8;
proto_tree_add_item(sebek_tree, hf_sebek_pid, tvb, offset, 4, FALSE);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_uid, tvb, offset, 4, FALSE);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_fd, tvb, offset, 4, FALSE);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_cmd, tvb, offset, 12, FALSE);
offset += 12;
datalen = tvb_get_letohl(tvb, offset);
proto_tree_add_item(sebek_tree, hf_sebek_len, tvb, offset, 4, FALSE);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_data, tvb, offset, -1, FALSE);
}
}
void
proto_register_sebek(void)
{
static hf_register_info hf[] = {
{ &hf_sebek_magic, {
"Magic", "sebek.magic", FT_UINT32, BASE_HEX,
NULL, 0, "Magic Number", HFILL }},
{ &hf_sebek_version, {
"Version", "sebek.version", FT_UINT16, BASE_DEC,
NULL, 0, "Version Number", HFILL }},
{ &hf_sebek_type, {
"Type", "sebek.type", FT_UINT16, BASE_DEC,
NULL, 0, "Type", HFILL }},
{ &hf_sebek_counter, {
"Counter", "sebek.counter", FT_UINT32, BASE_DEC,
NULL, 0, "Counter", HFILL }},
{ &hf_sebek_time, {
"Time", "sebek.time.sec", FT_ABSOLUTE_TIME, BASE_NONE,
NULL, 0, "Time", HFILL }},
{ &hf_sebek_pid, {
"Process ID", "sebek.pid", FT_UINT32, BASE_DEC,
NULL, 0, "Process ID", HFILL }},
{ &hf_sebek_uid, {
"User ID", "sebek.uid", FT_UINT32, BASE_DEC,
NULL, 0, "User ID", HFILL }},
{ &hf_sebek_fd, {
"File Descriptor", "sebek.fd", FT_UINT32, BASE_DEC,
NULL, 0, "File Descriptor Number", HFILL }},
{ &hf_sebek_cmd, {
"Command Name", "sebek.cmd", FT_STRING, 0,
NULL, 0, "Command Name", HFILL }},
{ &hf_sebek_len, {
"Data Length", "sebek.len", FT_UINT32, BASE_DEC,
NULL, 0, "Data Length", HFILL }},
{ &hf_sebek_data, {
"Data", "sebek.data", FT_STRING, 0,
NULL, 0, "Data", HFILL }},
};
static gint *ett[] = {
&ett_sebek,
};
proto_sebek = proto_register_protocol("SEBEK - Kernel Data Capture", "SEBEK",
"sebek");
proto_register_field_array(proto_sebek, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_sebek(void)
{
dissector_handle_t sebek_handle;
sebek_handle = create_dissector_handle(dissect_sebek, proto_sebek);
dissector_add("udp.port", UDP_PORT_SEBEK, sebek_handle);
}
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