epan/dissectors/packet-sebek.c

   1 /* packet-sebek.c
   2  * Routines for Sebek - Kernel based data capture - packet dissection
   3  * Modified to add sebek V3
   4  * Copyright 2006, Camilo Viecco <cviecco@indiana.edu>
   5  * Copyright 1999, Nathan Neulinger <nneul@umr.edu>
   6  *
   7  * See: http://project.honeynet.org/tools/sebek/ for more details
   8  *
   9  * $Id$
  10  *
  11  * Wireshark - Network traffic analyzer
  12  * By Gerald Combs <gerald@wireshark.org>
  13  * Copyright 1998 Gerald Combs
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #include <stdio.h>
  35
  36 #include <string.h>
  37 #include <time.h>
  38 #include <math.h>
  39 #include <glib.h>
  40
  41 #include <epan/packet.h>
  42 #include <epan/addr_resolv.h>
  43
  44 /*
  45   Sebek v2:
  46
  47         IP address:     32bit unsigned
  48         MAGIC Val:      32bit unsigned
  49         Sebek Ver:      16bit unsigned    #value must match 2
  50         Type            16bit unsigned
  51         Counter:        32bit unsigned
  52         Time_sec:       32bit unsigned
  53         Time_usec:      32bit unsigned
  54         Proc ID:        32bit unsigned
  55         User ID:        32bit unsigned
  56         File Desc:      32bit unsigned
  57         Command:        12char array
  58         Length:         Data Length
  59
  60         Data:           Variable Length data
  61
  62
  63   Sebek v3 header
  64         IP address:     32bit unsigned
  65         MAGIC Val:      32bit unsigned
  66         Sebek Ver:      16bit unsigned    #value must match 3
  67         Type            16bit unsigned
  68         Counter:        32bit unsigned
  69         Time_sec:       32bit unsigned
  70         Time_usec:      32bit unsigned
  71         Parent_pid:     32bit unsigned
  72         Proc ID:        32bit unsigned
  73         User ID:        32bit unsigned
  74         File Desc:      32bit unsigned
  75         inode:          32bit unsigned
  76         Command:        12char array
  77         Length:         Data Length
  78         Data:           Variable data length
  79
  80     Sebekv3 has a sock_socket_record subheader for IPV4:
  81         Dest_ip:         32bit unsigned
  82         Dest_port:       16bit unsigned
  83         Src_ip:          32bit unsigned
  84         src_port:        16bit unsigned
  85         call:            16bit unsigned
  86         proto             8bit unsigned
  87
  88  */
  89
  90 /* By default, but can be completely different */
  91 #define UDP_PORT_SEBEK  1101
  92
  93 static int proto_sebek = -1;
  94
  95 static int hf_sebek_magic = -1;
  96 static int hf_sebek_version = -1;
  97 static int hf_sebek_type = -1;
  98 static int hf_sebek_counter = -1;
  99 static int hf_sebek_time = -1;
 100 static int hf_sebek_pid = -1;
 101 static int hf_sebek_uid = -1;
 102 static int hf_sebek_fd = -1;
 103 static int hf_sebek_cmd = -1;
 104 static int hf_sebek_len = -1;
 105 static int hf_sebek_data = -1;
 106 static int hf_sebek_ppid = -1;
 107 static int hf_sebek_inode = -1;
 108 static int hf_sebek_socket_src_ip=-1;
 109 static int hf_sebek_socket_src_port=-1;
 110 static int hf_sebek_socket_dst_ip=-1;
 111 static int hf_sebek_socket_dst_port=-1;
 112 static int hf_sebek_socket_call=-1;
 113 static int hf_sebek_socket_proto=-1;
 114
 115
 116 static gint ett_sebek = -1;
 117
 118 /* dissect_sebek - dissects sebek packet data
 119  * tvb - tvbuff for packet data (IN)
 120  * pinfo - packet info
 121  * proto_tree - resolved protocol tree
 122  */
 123 static void
 124 dissect_sebek(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 125 {
 126         proto_tree      *sebek_tree;
 127         proto_item      *ti;
 128         int offset = 0;
 129         int datalen = 0;
 130         nstime_t ts;
 131         int sebek_ver = 0;
 132         int sebek_type = 0;
 133         int cmd_len = 0;
 134
 135         if (check_col(pinfo->cinfo, COL_PROTOCOL))
 136                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "SEBEK");
 137
 138         if (check_col(pinfo->cinfo, COL_INFO))
 139         {
 140                 col_clear(pinfo->cinfo, COL_INFO);
 141                 col_set_str(pinfo->cinfo, COL_INFO, "SEBEK - ");
 142
 143                 if (tvb->length<6)
 144                         sebek_ver = 0;
 145                 else
 146                         sebek_ver = tvb_get_ntohs(tvb, 4);
 147
 148                 switch (sebek_ver) {
 149                         case 2: col_append_fstr(pinfo->cinfo, COL_INFO, " pid(%d)", tvb_get_ntohl(tvb, 20));
 150                                 col_append_fstr(pinfo->cinfo, COL_INFO, " uid(%d)", tvb_get_ntohl(tvb, 24));
 151                                 col_append_fstr(pinfo->cinfo, COL_INFO, " fd(%d)", tvb_get_ntohl(tvb, 28));
 152                                 col_append_fstr(pinfo->cinfo, COL_INFO, " cmd: %s", tvb_format_text(tvb, 32, 12));
 153                                 break;
 154                         case 3: col_append_fstr(pinfo->cinfo, COL_INFO, " pid(%d)", tvb_get_ntohl(tvb, 24));
 155                                 col_append_fstr(pinfo->cinfo, COL_INFO, " uid(%d)", tvb_get_ntohl(tvb, 28));
 156                                 col_append_fstr(pinfo->cinfo, COL_INFO, " fd(%d)", tvb_get_ntohl(tvb, 32));
 157                                 cmd_len = tvb_strnlen(tvb, 40, 12);
 158                                 if (cmd_len<0)
 159                                         cmd_len = 0;
 160                                 col_append_fstr(pinfo->cinfo, COL_INFO, " cmd: %s", tvb_format_text(tvb, 40, cmd_len));
 161                                 break;
 162                         default:
 163                                 break;
 164                 }
 165         }
 166
 167
 168         if (tree) {
 169                 /* Adding Sebek item and subtree */
 170                 ti = proto_tree_add_item(tree, proto_sebek, tvb, 0, -1, FALSE);
 171                 sebek_tree = proto_item_add_subtree(ti, ett_sebek);
 172
 173                 /* check for minimum length before deciding where to go*/
 174                 if (tvb->length<6)
 175                         sebek_ver = 0;
 176                 else
 177                         sebek_ver = tvb_get_ntohs(tvb, 4);
 178
 179                 switch (sebek_ver) {
 180                         case 2: proto_tree_add_item(sebek_tree, hf_sebek_magic, tvb, offset, 4, FALSE);
 181                                 offset += 4;
 182
 183                                 proto_tree_add_item(sebek_tree, hf_sebek_version, tvb, offset, 2, FALSE);
 184                                 offset += 2;
 185
 186                                 proto_tree_add_item(sebek_tree, hf_sebek_type, tvb, offset, 2, FALSE);
 187                                 offset += 2;
 188
 189                                 proto_tree_add_item(sebek_tree, hf_sebek_counter, tvb, offset, 4, FALSE);
 190                                 offset += 4;
 191
 192                                 ts.secs = tvb_get_ntohl(tvb, offset);
 193                                 ts.nsecs = tvb_get_ntohl(tvb, offset+4);
 194                                 proto_tree_add_time(sebek_tree, hf_sebek_time, tvb, offset, 8, &ts);
 195                                 offset += 8;
 196
 197                                 proto_tree_add_item(sebek_tree, hf_sebek_pid, tvb, offset, 4, FALSE);
 198                                 offset += 4;
 199
 200                                 proto_tree_add_item(sebek_tree, hf_sebek_uid, tvb, offset, 4, FALSE);
 201                                 offset += 4;
 202
 203                                 proto_tree_add_item(sebek_tree, hf_sebek_fd, tvb, offset, 4, FALSE);
 204                                 offset += 4;
 205
 206                                 proto_tree_add_item(sebek_tree, hf_sebek_cmd, tvb, offset, 12, FALSE);
 207                                 offset += 12;
 208
 209                                 datalen = tvb_get_letohl(tvb, offset);
 210                                 proto_tree_add_item(sebek_tree, hf_sebek_len, tvb, offset, 4, FALSE);
 211                                 offset += 4;
 212
 213                                 proto_tree_add_item(sebek_tree, hf_sebek_data, tvb, offset, -1, FALSE);
 214
 215                                 break;
 216
 217                         case 3: proto_tree_add_item(sebek_tree, hf_sebek_magic, tvb, offset, 4, FALSE);
 218                                 offset += 4;
 219
 220                                 proto_tree_add_item(sebek_tree, hf_sebek_version, tvb, offset, 2, FALSE);
 221                                 offset += 2;
 222
 223                                 sebek_type=tvb_get_ntohs(tvb, offset);
 224                                 proto_tree_add_item(sebek_tree, hf_sebek_type, tvb, offset, 2, FALSE);
 225                                 offset += 2;
 226
 227                                 proto_tree_add_item(sebek_tree, hf_sebek_counter, tvb, offset, 4, FALSE);
 228                                 offset += 4;
 229
 230                                 ts.secs = tvb_get_ntohl(tvb, offset);
 231                                 ts.nsecs = tvb_get_ntohl(tvb, offset+4);
 232                                 proto_tree_add_time(sebek_tree, hf_sebek_time, tvb, offset, 8, &ts);
 233                                 offset += 8;
 234
 235                                 proto_tree_add_item(sebek_tree, hf_sebek_ppid, tvb, offset, 4, FALSE);
 236                                 offset += 4;
 237
 238                                 proto_tree_add_item(sebek_tree, hf_sebek_pid, tvb, offset, 4, FALSE);
 239                                 offset += 4;
 240
 241                                 proto_tree_add_item(sebek_tree, hf_sebek_uid, tvb, offset, 4, FALSE);
 242                                 offset += 4;
 243
 244                                 proto_tree_add_item(sebek_tree, hf_sebek_fd, tvb, offset, 4, FALSE);
 245                                 offset += 4;
 246
 247                                 proto_tree_add_item(sebek_tree, hf_sebek_inode, tvb, offset, 4, FALSE);
 248                                 offset += 4;
 249
 250                                 proto_tree_add_item(sebek_tree, hf_sebek_cmd, tvb, offset, 12, FALSE);
 251                                 offset += 12;
 252
 253                                 datalen = tvb_get_ntohl(tvb, offset);
 254                                 proto_tree_add_item(sebek_tree, hf_sebek_len, tvb, offset, 4, FALSE);
 255                                 offset += 4;
 256
 257                                 if (sebek_type == 2) {
 258                                         /*data is socket data, process accordingly*/
 259                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_dst_ip, tvb, offset, 4, FALSE);
 260                                         offset += 4;
 261                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_dst_port, tvb, offset, 2, FALSE);
 262                                         offset += 2;
 263                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_src_ip, tvb, offset, 4, FALSE);
 264                                         offset += 4;
 265                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_src_port, tvb, offset, 2, FALSE);
 266                                         offset += 2;
 267                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_call, tvb, offset, 2, FALSE);
 268                                         offset += 2;
 269                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_proto, tvb, offset, 1, FALSE);
 270                                         offset += 1;
 271                                 } else {
 272                                         proto_tree_add_item(sebek_tree, hf_sebek_data, tvb, offset, -1, FALSE);
 273                                 }
 274
 275                                 break;
 276
 277                         default:
 278                                 break;
 279
 280                 }
 281         }
 282 }
 283
 284 void
 285 proto_register_sebek(void)
 286 {
 287         static hf_register_info hf[] = {
 288                 { &hf_sebek_magic, {
 289                         "Magic", "sebek.magic", FT_UINT32, BASE_HEX,
 290                         NULL, 0, "Magic Number", HFILL }},
 291                 { &hf_sebek_version, {
 292                         "Version", "sebek.version", FT_UINT16, BASE_DEC,
 293                         NULL, 0, "Version Number", HFILL }},
 294                 { &hf_sebek_type, {
 295                         "Type", "sebek.type", FT_UINT16, BASE_DEC,
 296                         NULL, 0, "Type", HFILL }},
 297                 { &hf_sebek_counter, {
 298                         "Counter", "sebek.counter", FT_UINT32, BASE_DEC,
 299                         NULL, 0, "Counter", HFILL }},
 300                 { &hf_sebek_time, {
 301                         "Time", "sebek.time.sec", FT_ABSOLUTE_TIME, BASE_NONE,
 302                         NULL, 0, "Time", HFILL }},
 303                 { &hf_sebek_pid, {
 304                         "Process ID", "sebek.pid", FT_UINT32, BASE_DEC,
 305                         NULL, 0, "Process ID", HFILL }},
 306                 { &hf_sebek_uid, {
 307                         "User ID", "sebek.uid", FT_UINT32, BASE_DEC,
 308                         NULL, 0, "User ID", HFILL }},
 309                 { &hf_sebek_fd, {
 310                         "File Descriptor", "sebek.fd", FT_UINT32, BASE_DEC,
 311                         NULL, 0, "File Descriptor Number", HFILL }},
 312                 { &hf_sebek_cmd, {
 313                         "Command Name", "sebek.cmd", FT_STRING, 0,
 314                         NULL, 0, "Command Name", HFILL }},
 315                 { &hf_sebek_len, {
 316                         "Data Length", "sebek.len", FT_UINT32, BASE_DEC,
 317                         NULL, 0, "Data Length", HFILL }},
 318                 { &hf_sebek_ppid, {
 319                         "Parent Process ID", "sebek.ppid", FT_UINT32, BASE_DEC,
 320                         NULL, 0, "Process ID", HFILL }},
 321                 { &hf_sebek_inode, {
 322                         "Inode ID", "sebek.inode", FT_UINT32, BASE_DEC,
 323                         NULL, 0, "Process ID", HFILL }},
 324                 { &hf_sebek_data, {
 325                         "Data", "sebek.data", FT_STRING, 0,
 326                         NULL, 0, "Data", HFILL }},
 327                 { &hf_sebek_socket_src_ip, {
 328                         "Socket.local_ip", "sebek.socket.src_ip", FT_IPv4, 0,
 329                         NULL, 0, "Socket.src_ip", HFILL }},
 330                 { &hf_sebek_socket_src_port, {
 331                         "Socket.local_port", "sebek.socket.src_port", FT_UINT16, BASE_DEC,
 332                         NULL, 0, "Socket.src_port", HFILL }},
 333                 { &hf_sebek_socket_dst_ip, {
 334                         "Socket.remote_ip", "sebek.socket.dst_ip", FT_IPv4, 0,
 335                         NULL, 0, "Socket.dst_ip", HFILL }},
 336                 { &hf_sebek_socket_dst_port, {
 337                         "Socket.remote_port", "sebek.socket.dst_port", FT_UINT16, BASE_DEC,
 338                         NULL, 0, "Socket.dst_port", HFILL }},
 339                 { &hf_sebek_socket_call, {
 340                         "Socket.Call_id", "sebek.socket.call", FT_UINT16, BASE_DEC,
 341                         NULL, 0, "Socket.call", HFILL }},
 342                 { &hf_sebek_socket_proto, {
 343                         "Socket.ip_proto", "sebek.socket.ip_proto", FT_UINT8, BASE_DEC,
 344                         NULL, 0, "Socket.ip_proto", HFILL }}
 345         };
 346         static gint *ett[] = {
 347                 &ett_sebek
 348         };
 349
 350         proto_sebek = proto_register_protocol("SEBEK - Kernel Data Capture", "SEBEK", "sebek");
 351         proto_register_field_array(proto_sebek, hf, array_length(hf));
 352         proto_register_subtree_array(ett, array_length(ett));
 353 }
 354
 355 void
 356 proto_reg_handoff_sebek(void)
 357 {
 358         dissector_handle_t sebek_handle;
 359
 360         sebek_handle = create_dissector_handle(dissect_sebek, proto_sebek);
 361         dissector_add("udp.port", UDP_PORT_SEBEK, sebek_handle);
 362 }