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wireshark/epan/dissectors/packet-sebek.c

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/* packet-sebek.c
* Routines for Sebek - Kernel based data capture - packet dissection
* Modified to add sebek V3
* Copyright 2006, Camilo Viecco <cviecco@indiana.edu>
* Copyright 1999, Nathan Neulinger <nneul@umr.edu>
*
* See: http://project.honeynet.org/tools/sebek/ for more details
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <math.h>
#include <epan/packet.h>
/*
Sebek v2:
IP address: 32bit unsigned
MAGIC Val: 32bit unsigned
Sebek Ver: 16bit unsigned #value must match 2
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
Sebek v3 header
IP address: 32bit unsigned
MAGIC Val: 32bit unsigned
Sebek Ver: 16bit unsigned #value must match 3
Type 16bit unsigned
Counter: 32bit unsigned
Time_sec: 32bit unsigned
Time_usec: 32bit unsigned
Parent_pid: 32bit unsigned
Proc ID: 32bit unsigned
User ID: 32bit unsigned
File Desc: 32bit unsigned
inode: 32bit unsigned
Command: 12char array
Length: Data Length
Data: Variable data length
Sebekv3 has a sock_socket_record subheader for IPV4:
Dest_ip: 32bit unsigned
Dest_port: 16bit unsigned
Src_ip: 32bit unsigned
src_port: 16bit unsigned
call: 16bit unsigned
proto 8bit unsigned
*/
/* By default, but can be completely different */
#define UDP_PORT_SEBEK 1101 /* Not IANA registered */
void proto_register_sebek(void);
void proto_reg_handoff_sebek(void);
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 int hf_sebek_ppid = -1;
static int hf_sebek_inode = -1;
static int hf_sebek_socket_src_ip=-1;
static int hf_sebek_socket_src_port=-1;
static int hf_sebek_socket_dst_ip=-1;
static int hf_sebek_socket_dst_port=-1;
static int hf_sebek_socket_call=-1;
static int hf_sebek_socket_proto=-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 int
dissect_sebek(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
proto_tree *sebek_tree;
proto_item *ti;
int offset = 0;
nstime_t ts;
int sebek_ver = 0;
int sebek_type = 0;
int cmd_len = 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SEBEK");
col_set_str(pinfo->cinfo, COL_INFO, "SEBEK - ");
if (tvb_captured_length(tvb)<6)
sebek_ver = 0;
else
sebek_ver = tvb_get_ntohs(tvb, 4);
switch (sebek_ver) {
case 2: 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_format_text(tvb, 32, 12));
break;
case 3: col_append_fstr(pinfo->cinfo, COL_INFO, " pid(%d)", tvb_get_ntohl(tvb, 24));
col_append_fstr(pinfo->cinfo, COL_INFO, " uid(%d)", tvb_get_ntohl(tvb, 28));
col_append_fstr(pinfo->cinfo, COL_INFO, " fd(%d)", tvb_get_ntohl(tvb, 32));
cmd_len = tvb_strnlen(tvb, 40, 12);
if (cmd_len<0)
cmd_len = 0;
col_append_fstr(pinfo->cinfo, COL_INFO, " cmd: %s", tvb_format_text(tvb, 40, cmd_len));
break;
default:
break;
}
if (tree) {
/* Adding Sebek item and subtree */
ti = proto_tree_add_item(tree, proto_sebek, tvb, 0, -1, ENC_NA);
sebek_tree = proto_item_add_subtree(ti, ett_sebek);
/* check for minimum length before deciding where to go*/
if (tvb_captured_length(tvb)<6)
sebek_ver = 0;
else
sebek_ver = tvb_get_ntohs(tvb, 4);
switch (sebek_ver) {
case 2: proto_tree_add_item(sebek_tree, hf_sebek_magic, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_version, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_type, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_counter, tvb, offset, 4, ENC_BIG_ENDIAN);
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, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_uid, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_fd, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_cmd, tvb, offset, 12, ENC_ASCII|ENC_NA);
offset += 12;
proto_tree_add_item(sebek_tree, hf_sebek_len, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_data, tvb, offset, -1, ENC_ASCII|ENC_NA);
break;
case 3: proto_tree_add_item(sebek_tree, hf_sebek_magic, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_version, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
sebek_type=tvb_get_ntohs(tvb, offset);
proto_tree_add_item(sebek_tree, hf_sebek_type, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_counter, tvb, offset, 4, ENC_BIG_ENDIAN);
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_ppid, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_pid, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_uid, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_fd, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_inode, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_cmd, tvb, offset, 12, ENC_ASCII|ENC_NA);
offset += 12;
proto_tree_add_item(sebek_tree, hf_sebek_len, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
if (sebek_type == 2) {
/*data is socket data, process accordingly*/
proto_tree_add_item(sebek_tree, hf_sebek_socket_dst_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_socket_dst_port, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_socket_src_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(sebek_tree, hf_sebek_socket_src_port, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_socket_call, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(sebek_tree, hf_sebek_socket_proto, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
} else {
proto_tree_add_item(sebek_tree, hf_sebek_data, tvb, offset, -1, ENC_ASCII|ENC_NA);
}
break;
default:
break;
}
}
return offset;
}
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, NULL, HFILL }},
{ &hf_sebek_counter, {
"Counter", "sebek.counter", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_time, {
"Time", "sebek.time.sec", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_pid, {
"Process ID", "sebek.pid", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_uid, {
"User ID", "sebek.uid", FT_UINT32, BASE_DEC,
NULL, 0, NULL, 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, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_len, {
"Data Length", "sebek.len", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_ppid, {
"Parent Process ID", "sebek.ppid", FT_UINT32, BASE_DEC,
NULL, 0, "Process ID", HFILL }},
{ &hf_sebek_inode, {
"Inode ID", "sebek.inode", FT_UINT32, BASE_DEC,
NULL, 0, "Process ID", HFILL }},
{ &hf_sebek_data, {
"Data", "sebek.data", FT_STRING, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_sebek_socket_src_ip, {
"Socket.local_ip", "sebek.socket.src_ip", FT_IPv4, BASE_NONE,
NULL, 0, "Socket.src_ip", HFILL }},
{ &hf_sebek_socket_src_port, {
"Socket.local_port", "sebek.socket.src_port", FT_UINT16, BASE_DEC,
NULL, 0, "Socket.src_port", HFILL }},
{ &hf_sebek_socket_dst_ip, {
"Socket.remote_ip", "sebek.socket.dst_ip", FT_IPv4, BASE_NONE,
NULL, 0, "Socket.dst_ip", HFILL }},
{ &hf_sebek_socket_dst_port, {
"Socket.remote_port", "sebek.socket.dst_port", FT_UINT16, BASE_DEC,
NULL, 0, "Socket.dst_port", HFILL }},
{ &hf_sebek_socket_call, {
"Socket.Call_id", "sebek.socket.call", FT_UINT16, BASE_DEC,
NULL, 0, "Socket.call", HFILL }},
{ &hf_sebek_socket_proto, {
"Socket.ip_proto", "sebek.socket.ip_proto", FT_UINT8, BASE_DEC,
NULL, 0, NULL, 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_uint_with_preference("udp.port", UDP_PORT_SEBEK, sebek_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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