packet-tns.c

   1 /* packet-tns.c
   2  * Routines for MSX tns packet dissection
   3  *
   4  * $Id: packet-tns.c,v 1.11 2001/01/03 06:55:34 guy Exp $
   5  *
   6  * Ethereal - Network traffic analyzer
   7  * By Gerald Combs <gerald@zing.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * Copied from packet-tftp.c
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  25  */
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <stdio.h>
  32
  33 #ifdef HAVE_SYS_TYPES_H
  34 # include <sys/types.h>
  35 #endif
  36
  37 #ifdef HAVE_NETINET_IN_H
  38 # include <netinet/in.h>
  39 #endif
  40
  41 #include <string.h>
  42 #include <glib.h>
  43 #include "packet.h"
  44 #include "packet-tns.h"
  45
  46 static int proto_tns = -1;
  47 static int hf_tns_request = -1;
  48 static int hf_tns_response = -1;
  49 static int hf_tns_length = -1;
  50 static int hf_tns_packet_checksum = -1;
  51 static int hf_tns_header_checksum = -1;
  52 static int hf_tns_packet_type = -1;
  53 static int hf_tns_reserved_byte = -1;
  54 static int hf_tns_data_flag = -1;
  55 static int hf_tns_sns = -1;
  56 static int hf_tns_connect = -1;
  57 static int hf_tns_version = -1;
  58 static int hf_tns_compat_version = -1;
  59 static int hf_tns_service_options = -1;
  60
  61 static gint ett_tns = -1;
  62 static gint ett_tns_sns = -1;
  63 static gint ett_tns_connect = -1;
  64 static gint ett_sql = -1;
  65
  66 #define TCP_PORT_TNS                    1521
  67
  68 static const value_string tns_type_vals[] = {
  69                 {TNS_TYPE_CONNECT, "Connect" },
  70                 {TNS_TYPE_ACCEPT, "Accept" },
  71                 {TNS_TYPE_DATA, "Data" },
  72                 {TNS_TYPE_RESEND, "Resend"},
  73                 {0, NULL}
  74 };
  75
  76
  77 /* Handy macro for checking for truncated packet */
  78 #define TRUNC(length) if ( ! BYTES_ARE_IN_FRAME(offset, length)) { \
  79                         old_dissect_data(pd,offset,fd,tree); return; }
  80
  81 static void dissect_tns_sns(const u_char *pd, int offset, frame_data *fd,
  82         proto_tree *tree, proto_tree *tns_tree)
  83 {
  84         proto_tree *sns_tree = NULL, *ti;
  85
  86         if ( tree )
  87         {
  88                 ti = proto_tree_add_text(tns_tree, NullTVB, offset, END_OF_FRAME, "Secure Network Services");
  89                 sns_tree = proto_item_add_subtree(ti, ett_tns_sns);
  90
  91                 proto_tree_add_boolean_hidden(tns_tree, hf_tns_sns, NullTVB, 0, 0, TRUE);
  92         }
  93
  94         if ( check_col(fd, COL_INFO) )
  95         {
  96                 col_append_fstr(fd, COL_INFO, ", SNS");
  97         }
  98
  99         if ( sns_tree )
 100         {
 101                 old_dissect_data(pd,offset,fd,sns_tree);
 102         }
 103 }
 104
 105 static void dissect_tns_data(const u_char *pd, int offset, frame_data *fd,
 106         proto_tree *tree, proto_tree *tns_tree)
 107 {
 108
 109         TRUNC(2);
 110         if ( tree )
 111         {
 112                 proto_tree_add_uint(tns_tree, hf_tns_data_flag, NullTVB,
 113                         offset, 2, pntohs(&pd[offset]));
 114         }
 115         offset += 2;
 116
 117         if ( BYTES_ARE_IN_FRAME(offset, 4) )
 118         {
 119                 if ( pd[offset] == 0xDE && pd[offset+1] == 0xAD &&
 120                         pd[offset+2] == 0xBE && pd[offset+3] == 0xEF )
 121                 {
 122                         dissect_tns_sns(pd,offset,fd,tree,tns_tree);
 123                         return;
 124                 }
 125         }
 126
 127         old_dissect_data(pd,offset,fd,tree);
 128         return;
 129 }
 130
 131 static void dissect_tns_connect(const u_char *pd, int offset, frame_data *fd,
 132         proto_tree *tree, proto_tree *tns_tree)
 133 {
 134         proto_tree *connect_tree = NULL, *ti;
 135
 136         if ( tree )
 137         {
 138                 ti = proto_tree_add_text(tns_tree, NullTVB, offset, END_OF_FRAME, "Connect");
 139                 connect_tree = proto_item_add_subtree(ti, ett_tns_connect);
 140
 141                 proto_tree_add_boolean_hidden(tns_tree, hf_tns_connect, NullTVB, 0, 0, TRUE);
 142         }
 143
 144         if ( check_col(fd, COL_INFO) )
 145         {
 146                 col_append_fstr(fd, COL_INFO, ", Connect");
 147         }
 148
 149         TRUNC(2);
 150         if ( connect_tree )
 151         {
 152                 proto_tree_add_uint(connect_tree, hf_tns_version, NullTVB,
 153                         offset, 2, pntohs(&pd[offset]));
 154         }
 155         offset += 2;
 156
 157         TRUNC(2);
 158         if ( connect_tree )
 159         {
 160                 proto_tree_add_uint(connect_tree, hf_tns_compat_version, NullTVB,
 161                         offset, 2, pntohs(&pd[offset]));
 162         }
 163         offset += 2;
 164
 165         TRUNC(2);
 166         if ( connect_tree )
 167         {
 168                 /* need to break down w/ bitfield */
 169                 proto_tree_add_uint(connect_tree, hf_tns_service_options, NullTVB,
 170                         offset, 2, pntohs(&pd[offset]));
 171         }
 172         offset += 2;
 173
 174         if ( connect_tree )
 175         {
 176                 old_dissect_data(pd,offset,fd,connect_tree);
 177         }
 178         return;
 179 }
 180
 181 static void dissect_tns_accept(const u_char *pd, int offset, frame_data *fd,
 182         proto_tree *tree, proto_tree *tns_tree)
 183 {
 184         old_dissect_data(pd,offset,fd,tns_tree);
 185         return;
 186 }
 187
 188
 189 static void
 190 dissect_tns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
 191 {
 192         proto_tree      *tns_tree = NULL, *ti;
 193         guint16 length;
 194         guint16 type;
 195
 196         OLD_CHECK_DISPLAY_AS_DATA(proto_tns, pd, offset, fd, tree);
 197
 198         if (check_col(fd, COL_PROTOCOL))
 199                 col_set_str(fd, COL_PROTOCOL, "TNS");
 200
 201         if (check_col(fd, COL_INFO))
 202         {
 203                 col_add_fstr(fd, COL_INFO, "%s",
 204                         (pi.match_port == pi.destport) ? "Request" : "Response");
 205         }
 206
 207         if (tree)
 208         {
 209                 ti = proto_tree_add_item(tree, proto_tns, NullTVB, offset, END_OF_FRAME, FALSE);
 210                 tns_tree = proto_item_add_subtree(ti, ett_tns);
 211
 212                 if (pi.match_port == pi.destport)
 213                 {
 214                         proto_tree_add_boolean_hidden(tns_tree, hf_tns_request, NullTVB,
 215                            offset, END_OF_FRAME, TRUE);
 216                         proto_tree_add_text(tns_tree, NullTVB, offset,
 217                                 END_OF_FRAME, "Request: <opaque data>" );
 218                 }
 219                 else
 220                 {
 221                         proto_tree_add_boolean_hidden(tns_tree, hf_tns_response, NullTVB,
 222                                 offset, END_OF_FRAME, TRUE);
 223                         proto_tree_add_text(tns_tree, NullTVB, offset,
 224                                 END_OF_FRAME, "Response: <opaque data>");
 225                 }
 226         }
 227
 228                 /* check to make sure length is present */
 229         if ( ! BYTES_ARE_IN_FRAME(offset, 2)) return;
 230
 231         length = pntohs(&pd[offset]);
 232         if (tree)
 233         {
 234                 proto_tree_add_uint(tns_tree, hf_tns_length, NullTVB,
 235                         offset, 2, length);
 236         }
 237         TRUNC(length);
 238         offset += 2;
 239
 240         TRUNC(2);
 241         if ( tree )
 242         {
 243                 proto_tree_add_uint(tns_tree, hf_tns_packet_checksum, NullTVB,
 244                         offset, 2, pntohs(&pd[offset]));
 245         }
 246         offset += 2;
 247
 248         TRUNC(2);
 249         type = pd[offset];
 250         if ( tree )
 251         {
 252                 proto_tree_add_uint(tns_tree, hf_tns_packet_type, NullTVB,
 253                         offset, 1, type);
 254         }
 255         offset += 1;
 256
 257         if ( check_col(fd, COL_INFO))
 258         {
 259                 col_append_fstr(fd, COL_INFO, ", %s (%d)",
 260                         val_to_str(type, tns_type_vals, "Unknown"), type);
 261         }
 262
 263         TRUNC(1);
 264         if ( tree )
 265         {
 266                 proto_tree_add_bytes(tns_tree, hf_tns_reserved_byte, NullTVB,
 267                         offset, 1, &pd[offset]);
 268         }
 269         offset += 1;
 270
 271         TRUNC(2);
 272         if ( tree )
 273         {
 274                 proto_tree_add_uint(tns_tree, hf_tns_header_checksum, NullTVB,
 275                         offset, 2, pntohs(&pd[offset]));
 276         }
 277         offset += 2;
 278
 279         switch (type)
 280         {
 281                 case TNS_TYPE_CONNECT:
 282                         dissect_tns_connect(pd,offset,fd,tree,tns_tree);
 283                         break;
 284                 case TNS_TYPE_ACCEPT:
 285                         dissect_tns_accept(pd,offset,fd,tree,tns_tree);
 286                         break;
 287                 case TNS_TYPE_DATA:
 288                         dissect_tns_data(pd,offset,fd,tree,tns_tree);
 289                         break;
 290                 default:
 291                         old_dissect_data(pd,offset,fd,tns_tree);
 292         }
 293 }
 294
 295 void proto_register_tns(void)
 296 {
 297         static hf_register_info hf[] = {
 298                 { &hf_tns_sns, {
 299                         "Secure Network Services", "tns.sns", FT_BOOLEAN, BASE_NONE,
 300                         NULL, 0x0, "Secure Network Services" }},
 301                 { &hf_tns_connect, {
 302                         "Connect", "tns.connect", FT_BOOLEAN, BASE_NONE,
 303                         NULL, 0x0, "Connect" }},
 304                 { &hf_tns_response, {
 305                         "Response", "tns.response", FT_BOOLEAN, BASE_NONE,
 306                         NULL, 0x0, "TRUE if TNS response" }},
 307                 { &hf_tns_request, {
 308                         "Request", "tns.request", FT_BOOLEAN, BASE_NONE,
 309                         NULL, 0x0, "TRUE if TNS request" }},
 310                 { &hf_tns_length, {
 311                         "Packet Length", "tns.length", FT_UINT32, BASE_NONE,
 312                         NULL, 0x0, "Length of TNS packet" }},
 313                 { &hf_tns_packet_checksum, {
 314                         "Packet Checksum", "tns.packet_checksum", FT_UINT16, BASE_HEX,
 315                         NULL, 0x0, "Checksum of Packet Data" }},
 316                 { &hf_tns_header_checksum, {
 317                         "Header Checksum", "tns.header_checksum", FT_UINT16, BASE_HEX,
 318                         NULL, 0x0, "Checksum of Header Data" }},
 319                 { &hf_tns_data_flag, {
 320                         "Data Flag", "tns.data_flag", FT_UINT16, BASE_HEX,
 321                         NULL, 0x0, "Data Flag" }},
 322                 { &hf_tns_version, {
 323                         "Version", "tns.version", FT_UINT16, BASE_DEC,
 324                         NULL, 0x0, "Version" }},
 325                 { &hf_tns_compat_version, {
 326                         "Version (Compatible)", "tns.compat_version", FT_UINT16, BASE_DEC,
 327                         NULL, 0x0, "Version (Compatible)" }},
 328                 { &hf_tns_service_options, {
 329                         "Service Options", "tns.service_options", FT_UINT16, BASE_HEX,
 330                         NULL, 0x0, "Service Options" }},
 331                 { &hf_tns_reserved_byte, {
 332                         "Reserved Byte", "tns.reserved_byte", FT_BYTES, BASE_HEX,
 333                         NULL, 0x0, "Reserved Byte" }},
 334                 { &hf_tns_packet_type, {
 335                         "Packet Type", "tns.type", FT_UINT8, BASE_NONE,
 336                         VALS(tns_type_vals), 0x0, "Type of TNS packet" }}
 337         };
 338
 339         static gint *ett[] = {
 340                 &ett_tns,
 341                 &ett_tns_sns,
 342                 &ett_tns_connect,
 343                 &ett_sql
 344         };
 345         proto_tns = proto_register_protocol(
 346                 "Transparent Network Substrate Protocol", "TNS", "tns");
 347         proto_register_field_array(proto_tns, hf, array_length(hf));
 348         proto_register_subtree_array(ett, array_length(ett));
 349 }
 350
 351 void
 352 proto_reg_handoff_tns(void)
 353 {
 354         old_dissector_add("tcp.port", TCP_PORT_TNS, dissect_tns);
 355 }