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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  28  */
  29
  30 #include "config.h"
  31
  32 #include <string.h>
  33 #include <time.h>
  34 #include <math.h>
  35 #include <glib.h>
  36
  37 #include <epan/packet.h>
  38 #include <epan/addr_resolv.h>
  39
  40 /*
  41   Sebek v2:
  42
  43         IP address:     32bit unsigned
  44         MAGIC Val:      32bit unsigned
  45         Sebek Ver:      16bit unsigned    #value must match 2
  46         Type            16bit unsigned
  47         Counter:        32bit unsigned
  48         Time_sec:       32bit unsigned
  49         Time_usec:      32bit unsigned
  50         Proc ID:        32bit unsigned
  51         User ID:        32bit unsigned
  52         File Desc:      32bit unsigned
  53         Command:        12char array
  54         Length:         Data Length
  55
  56         Data:           Variable Length data
  57
  58
  59   Sebek v3 header
  60         IP address:     32bit unsigned
  61         MAGIC Val:      32bit unsigned
  62         Sebek Ver:      16bit unsigned    #value must match 3
  63         Type            16bit unsigned
  64         Counter:        32bit unsigned
  65         Time_sec:       32bit unsigned
  66         Time_usec:      32bit unsigned
  67         Parent_pid:     32bit unsigned
  68         Proc ID:        32bit unsigned
  69         User ID:        32bit unsigned
  70         File Desc:      32bit unsigned
  71         inode:          32bit unsigned
  72         Command:        12char array
  73         Length:         Data Length
  74         Data:           Variable data length
  75
  76     Sebekv3 has a sock_socket_record subheader for IPV4:
  77         Dest_ip:         32bit unsigned
  78         Dest_port:       16bit unsigned
  79         Src_ip:          32bit unsigned
  80         src_port:        16bit unsigned
  81         call:            16bit unsigned
  82         proto             8bit unsigned
  83
  84  */
  85
  86 /* By default, but can be completely different */
  87 #define UDP_PORT_SEBEK  1101
  88
  89 static int proto_sebek = -1;
  90
  91 static int hf_sebek_magic = -1;
  92 static int hf_sebek_version = -1;
  93 static int hf_sebek_type = -1;
  94 static int hf_sebek_counter = -1;
  95 static int hf_sebek_time = -1;
  96 static int hf_sebek_pid = -1;
  97 static int hf_sebek_uid = -1;
  98 static int hf_sebek_fd = -1;
  99 static int hf_sebek_cmd = -1;
 100 static int hf_sebek_len = -1;
 101 static int hf_sebek_data = -1;
 102 static int hf_sebek_ppid = -1;
 103 static int hf_sebek_inode = -1;
 104 static int hf_sebek_socket_src_ip=-1;
 105 static int hf_sebek_socket_src_port=-1;
 106 static int hf_sebek_socket_dst_ip=-1;
 107 static int hf_sebek_socket_dst_port=-1;
 108 static int hf_sebek_socket_call=-1;
 109 static int hf_sebek_socket_proto=-1;
 110
 111
 112 static gint ett_sebek = -1;
 113
 114 /* dissect_sebek - dissects sebek packet data
 115  * tvb - tvbuff for packet data (IN)
 116  * pinfo - packet info
 117  * proto_tree - resolved protocol tree
 118  */
 119 static int
 120 dissect_sebek(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
 121 {
 122         proto_tree      *sebek_tree;
 123         proto_item      *ti;
 124         int offset = 0;
 125         nstime_t ts;
 126         int sebek_ver = 0;
 127         int sebek_type = 0;
 128         int cmd_len = 0;
 129
 130         col_set_str(pinfo->cinfo, COL_PROTOCOL, "SEBEK");
 131
 132         col_set_str(pinfo->cinfo, COL_INFO, "SEBEK - ");
 133
 134         if (tvb_length(tvb)<6)
 135                 sebek_ver = 0;
 136         else
 137                 sebek_ver = tvb_get_ntohs(tvb, 4);
 138
 139         switch (sebek_ver) {
 140                 case 2: col_append_fstr(pinfo->cinfo, COL_INFO, " pid(%d)", tvb_get_ntohl(tvb, 20));
 141                                 col_append_fstr(pinfo->cinfo, COL_INFO, " uid(%d)", tvb_get_ntohl(tvb, 24));
 142                                 col_append_fstr(pinfo->cinfo, COL_INFO, " fd(%d)", tvb_get_ntohl(tvb, 28));
 143                                 col_append_fstr(pinfo->cinfo, COL_INFO, " cmd: %s", tvb_format_text(tvb, 32, 12));
 144                                 break;
 145                 case 3: col_append_fstr(pinfo->cinfo, COL_INFO, " pid(%d)", tvb_get_ntohl(tvb, 24));
 146                                 col_append_fstr(pinfo->cinfo, COL_INFO, " uid(%d)", tvb_get_ntohl(tvb, 28));
 147                                 col_append_fstr(pinfo->cinfo, COL_INFO, " fd(%d)", tvb_get_ntohl(tvb, 32));
 148                                 cmd_len = tvb_strnlen(tvb, 40, 12);
 149                                 if (cmd_len<0)
 150                                         cmd_len = 0;
 151                                 col_append_fstr(pinfo->cinfo, COL_INFO, " cmd: %s", tvb_format_text(tvb, 40, cmd_len));
 152                                 break;
 153                 default:
 154                         break;
 155         }
 156
 157         if (tree) {
 158                 /* Adding Sebek item and subtree */
 159                 ti = proto_tree_add_item(tree, proto_sebek, tvb, 0, -1, ENC_NA);
 160                 sebek_tree = proto_item_add_subtree(ti, ett_sebek);
 161
 162                 /* check for minimum length before deciding where to go*/
 163                 if (tvb_length(tvb)<6)
 164                         sebek_ver = 0;
 165                 else
 166                         sebek_ver = tvb_get_ntohs(tvb, 4);
 167
 168                 switch (sebek_ver) {
 169                         case 2: proto_tree_add_item(sebek_tree, hf_sebek_magic, tvb, offset, 4, ENC_BIG_ENDIAN);
 170                                 offset += 4;
 171
 172                                 proto_tree_add_item(sebek_tree, hf_sebek_version, tvb, offset, 2, ENC_BIG_ENDIAN);
 173                                 offset += 2;
 174
 175                                 proto_tree_add_item(sebek_tree, hf_sebek_type, tvb, offset, 2, ENC_BIG_ENDIAN);
 176                                 offset += 2;
 177
 178                                 proto_tree_add_item(sebek_tree, hf_sebek_counter, tvb, offset, 4, ENC_BIG_ENDIAN);
 179                                 offset += 4;
 180
 181                                 ts.secs = tvb_get_ntohl(tvb, offset);
 182                                 ts.nsecs = tvb_get_ntohl(tvb, offset+4);
 183                                 proto_tree_add_time(sebek_tree, hf_sebek_time, tvb, offset, 8, &ts);
 184                                 offset += 8;
 185
 186                                 proto_tree_add_item(sebek_tree, hf_sebek_pid, tvb, offset, 4, ENC_BIG_ENDIAN);
 187                                 offset += 4;
 188
 189                                 proto_tree_add_item(sebek_tree, hf_sebek_uid, tvb, offset, 4, ENC_BIG_ENDIAN);
 190                                 offset += 4;
 191
 192                                 proto_tree_add_item(sebek_tree, hf_sebek_fd, tvb, offset, 4, ENC_BIG_ENDIAN);
 193                                 offset += 4;
 194
 195                                 proto_tree_add_item(sebek_tree, hf_sebek_cmd, tvb, offset, 12, ENC_ASCII|ENC_NA);
 196                                 offset += 12;
 197
 198                                 proto_tree_add_item(sebek_tree, hf_sebek_len, tvb, offset, 4, ENC_BIG_ENDIAN);
 199                                 offset += 4;
 200
 201                                 proto_tree_add_item(sebek_tree, hf_sebek_data, tvb, offset, -1, ENC_ASCII|ENC_NA);
 202
 203                                 break;
 204
 205                         case 3: proto_tree_add_item(sebek_tree, hf_sebek_magic, tvb, offset, 4, ENC_BIG_ENDIAN);
 206                                 offset += 4;
 207
 208                                 proto_tree_add_item(sebek_tree, hf_sebek_version, tvb, offset, 2, ENC_BIG_ENDIAN);
 209                                 offset += 2;
 210
 211                                 sebek_type=tvb_get_ntohs(tvb, offset);
 212                                 proto_tree_add_item(sebek_tree, hf_sebek_type, tvb, offset, 2, ENC_BIG_ENDIAN);
 213                                 offset += 2;
 214
 215                                 proto_tree_add_item(sebek_tree, hf_sebek_counter, tvb, offset, 4, ENC_BIG_ENDIAN);
 216                                 offset += 4;
 217
 218                                 ts.secs = tvb_get_ntohl(tvb, offset);
 219                                 ts.nsecs = tvb_get_ntohl(tvb, offset+4);
 220                                 proto_tree_add_time(sebek_tree, hf_sebek_time, tvb, offset, 8, &ts);
 221                                 offset += 8;
 222
 223                                 proto_tree_add_item(sebek_tree, hf_sebek_ppid, tvb, offset, 4, ENC_BIG_ENDIAN);
 224                                 offset += 4;
 225
 226                                 proto_tree_add_item(sebek_tree, hf_sebek_pid, tvb, offset, 4, ENC_BIG_ENDIAN);
 227                                 offset += 4;
 228
 229                                 proto_tree_add_item(sebek_tree, hf_sebek_uid, tvb, offset, 4, ENC_BIG_ENDIAN);
 230                                 offset += 4;
 231
 232                                 proto_tree_add_item(sebek_tree, hf_sebek_fd, tvb, offset, 4, ENC_BIG_ENDIAN);
 233                                 offset += 4;
 234
 235                                 proto_tree_add_item(sebek_tree, hf_sebek_inode, tvb, offset, 4, ENC_BIG_ENDIAN);
 236                                 offset += 4;
 237
 238                                 proto_tree_add_item(sebek_tree, hf_sebek_cmd, tvb, offset, 12, ENC_ASCII|ENC_NA);
 239                                 offset += 12;
 240
 241                                 proto_tree_add_item(sebek_tree, hf_sebek_len, tvb, offset, 4, ENC_BIG_ENDIAN);
 242                                 offset += 4;
 243
 244                                 if (sebek_type == 2) {
 245                                         /*data is socket data, process accordingly*/
 246                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_dst_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
 247                                         offset += 4;
 248                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_dst_port, tvb, offset, 2, ENC_BIG_ENDIAN);
 249                                         offset += 2;
 250                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_src_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
 251                                         offset += 4;
 252                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_src_port, tvb, offset, 2, ENC_BIG_ENDIAN);
 253                                         offset += 2;
 254                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_call, tvb, offset, 2, ENC_BIG_ENDIAN);
 255                                         offset += 2;
 256                                         proto_tree_add_item(sebek_tree, hf_sebek_socket_proto, tvb, offset, 1, ENC_BIG_ENDIAN);
 257                                         offset += 1;
 258                                 } else {
 259                                         proto_tree_add_item(sebek_tree, hf_sebek_data, tvb, offset, -1, ENC_ASCII|ENC_NA);
 260                                 }
 261
 262                                 break;
 263
 264                         default:
 265                                 break;
 266
 267                 }
 268         }
 269         return offset;
 270 }
 271
 272 void
 273 proto_register_sebek(void)
 274 {
 275         static hf_register_info hf[] = {
 276                 { &hf_sebek_magic, {
 277                         "Magic", "sebek.magic", FT_UINT32, BASE_HEX,
 278                         NULL, 0, "Magic Number", HFILL }},
 279                 { &hf_sebek_version, {
 280                         "Version", "sebek.version", FT_UINT16, BASE_DEC,
 281                         NULL, 0, "Version Number", HFILL }},
 282                 { &hf_sebek_type, {
 283                         "Type", "sebek.type", FT_UINT16, BASE_DEC,
 284                         NULL, 0, NULL, HFILL }},
 285                 { &hf_sebek_counter, {
 286                         "Counter", "sebek.counter", FT_UINT32, BASE_DEC,
 287                         NULL, 0, NULL, HFILL }},
 288                 { &hf_sebek_time, {
 289                         "Time", "sebek.time.sec", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL,
 290                         NULL, 0, NULL, HFILL }},
 291                 { &hf_sebek_pid, {
 292                         "Process ID", "sebek.pid", FT_UINT32, BASE_DEC,
 293                         NULL, 0, NULL, HFILL }},
 294                 { &hf_sebek_uid, {
 295                         "User ID", "sebek.uid", FT_UINT32, BASE_DEC,
 296                         NULL, 0, NULL, HFILL }},
 297                 { &hf_sebek_fd, {
 298                         "File Descriptor", "sebek.fd", FT_UINT32, BASE_DEC,
 299                         NULL, 0, "File Descriptor Number", HFILL }},
 300                 { &hf_sebek_cmd, {
 301                         "Command Name", "sebek.cmd", FT_STRING, BASE_NONE,
 302                         NULL, 0, NULL, HFILL }},
 303                 { &hf_sebek_len, {
 304                         "Data Length", "sebek.len", FT_UINT32, BASE_DEC,
 305                         NULL, 0, NULL, HFILL }},
 306                 { &hf_sebek_ppid, {
 307                         "Parent Process ID", "sebek.ppid", FT_UINT32, BASE_DEC,
 308                         NULL, 0, "Process ID", HFILL }},
 309                 { &hf_sebek_inode, {
 310                         "Inode ID", "sebek.inode", FT_UINT32, BASE_DEC,
 311                         NULL, 0, "Process ID", HFILL }},
 312                 { &hf_sebek_data, {
 313                         "Data", "sebek.data", FT_STRING, BASE_NONE,
 314                         NULL, 0, NULL, HFILL }},
 315                 { &hf_sebek_socket_src_ip, {
 316                         "Socket.local_ip", "sebek.socket.src_ip", FT_IPv4, BASE_NONE,
 317                         NULL, 0, "Socket.src_ip", HFILL }},
 318                 { &hf_sebek_socket_src_port, {
 319                         "Socket.local_port", "sebek.socket.src_port", FT_UINT16, BASE_DEC,
 320                         NULL, 0, "Socket.src_port", HFILL }},
 321                 { &hf_sebek_socket_dst_ip, {
 322                         "Socket.remote_ip", "sebek.socket.dst_ip", FT_IPv4, BASE_NONE,
 323                         NULL, 0, "Socket.dst_ip", HFILL }},
 324                 { &hf_sebek_socket_dst_port, {
 325                         "Socket.remote_port", "sebek.socket.dst_port", FT_UINT16, BASE_DEC,
 326                         NULL, 0, "Socket.dst_port", HFILL }},
 327                 { &hf_sebek_socket_call, {
 328                         "Socket.Call_id", "sebek.socket.call", FT_UINT16, BASE_DEC,
 329                         NULL, 0, "Socket.call", HFILL }},
 330                 { &hf_sebek_socket_proto, {
 331                         "Socket.ip_proto", "sebek.socket.ip_proto", FT_UINT8, BASE_DEC,
 332                         NULL, 0, NULL, HFILL }}
 333         };
 334         static gint *ett[] = {
 335                 &ett_sebek
 336         };
 337
 338         proto_sebek = proto_register_protocol("SEBEK - Kernel Data Capture", "SEBEK", "sebek");
 339         proto_register_field_array(proto_sebek, hf, array_length(hf));
 340         proto_register_subtree_array(ett, array_length(ett));
 341 }
 342
 343 void
 344 proto_reg_handoff_sebek(void)
 345 {
 346         dissector_handle_t sebek_handle;
 347
 348         sebek_handle = new_create_dissector_handle(dissect_sebek, proto_sebek);
 349         dissector_add_uint("udp.port", UDP_PORT_SEBEK, sebek_handle);
 350 }