packet-tns.c

   1 /* packet-tns.c
   2  * Routines for MSX tns packet dissection
   3  *
   4  * $Id: packet-tns.c,v 1.3 1999/11/30 17:58:32 nneul Exp $
   5  *
   6  * Ethereal - Network traffic analyzer
   7  * By Gerald Combs <gerald@unicom.net>
   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 static const value_string tns_type_vals[] = {
  67                 {TNS_TYPE_CONNECT, "Connect" },
  68                 {TNS_TYPE_ACCEPT, "Accept" },
  69                 {TNS_TYPE_DATA, "Data" },
  70                 {TNS_TYPE_RESEND, "Resend"},
  71         {0, NULL}
  72 };
  73
  74
  75 /* Handy macro for checking for truncated packet */
  76 #define TRUNC(length) if ( ! BYTES_ARE_IN_FRAME(offset, length)) { \
  77                         dissect_data(pd,offset,fd,tree); return; }
  78
  79 void dissect_tns_sns(const u_char *pd, int offset, frame_data *fd,
  80         proto_tree *tree, proto_tree *tns_tree)
  81 {
  82         proto_tree *sns_tree = NULL, *ti;
  83
  84         if ( tree )
  85         {
  86                 ti = proto_tree_add_text(tns_tree, offset, END_OF_FRAME, "Secure Network Services");
  87                 sns_tree = proto_item_add_subtree(ti, ett_tns_sns);
  88
  89                 proto_tree_add_item_hidden(tns_tree, hf_tns_sns, 0, 0, TRUE);
  90         }
  91
  92         if ( check_col(fd, COL_INFO) )
  93         {
  94                 col_append_fstr(fd, COL_INFO, ", SNS");
  95         }
  96
  97         if ( sns_tree )
  98         {
  99                 dissect_data(pd,offset,fd,sns_tree);
 100         }
 101 }
 102
 103 void dissect_tns_data(const u_char *pd, int offset, frame_data *fd,
 104         proto_tree *tree, proto_tree *tns_tree)
 105 {
 106
 107         TRUNC(2);
 108         if ( tree )
 109         {
 110                 proto_tree_add_item(tns_tree, hf_tns_data_flag,
 111                         offset, 2, pntohs(&pd[offset]));
 112         }
 113         offset += 2;
 114
 115         if ( BYTES_ARE_IN_FRAME(offset, 4) )
 116         {
 117                 if ( pd[offset] == 0xDE && pd[offset+1] == 0xAD &&
 118                         pd[offset+2] == 0xBE && pd[offset+3] == 0xEF )
 119                 {
 120                         dissect_tns_sns(pd,offset,fd,tree,tns_tree);
 121                         return;
 122                 }
 123         }
 124
 125         dissect_data(pd,offset,fd,tree);
 126         return;
 127 }
 128
 129 void dissect_tns_connect(const u_char *pd, int offset, frame_data *fd,
 130         proto_tree *tree, proto_tree *tns_tree)
 131 {
 132         proto_tree *connect_tree = NULL, *ti;
 133
 134         if ( tree )
 135         {
 136                 ti = proto_tree_add_text(tns_tree, offset, END_OF_FRAME, "Connect");
 137                 connect_tree = proto_item_add_subtree(ti, ett_tns_connect);
 138
 139                 proto_tree_add_item_hidden(tns_tree, hf_tns_connect, 0, 0, TRUE);
 140         }
 141
 142         if ( check_col(fd, COL_INFO) )
 143         {
 144                 col_append_fstr(fd, COL_INFO, ", Connect");
 145         }
 146
 147         TRUNC(2);
 148         if ( connect_tree )
 149         {
 150                 proto_tree_add_item(connect_tree, hf_tns_version,
 151                         offset, 2, pntohs(&pd[offset]));
 152         }
 153         offset += 2;
 154
 155         TRUNC(2);
 156         if ( connect_tree )
 157         {
 158                 proto_tree_add_item(connect_tree, hf_tns_compat_version,
 159                         offset, 2, pntohs(&pd[offset]));
 160         }
 161         offset += 2;
 162
 163         TRUNC(2);
 164         if ( connect_tree )
 165         {
 166                 /* need to break down w/ bitfield */
 167                 proto_tree_add_item(connect_tree, hf_tns_service_options,
 168                         offset, 2, pntohs(&pd[offset]));
 169         }
 170         offset += 2;
 171
 172         if ( connect_tree )
 173         {
 174                 dissect_data(pd,offset,fd,connect_tree);
 175         }
 176         return;
 177 }
 178
 179 void dissect_tns_accept(const u_char *pd, int offset, frame_data *fd,
 180         proto_tree *tree, proto_tree *tns_tree)
 181 {
 182         dissect_data(pd,offset,fd,tns_tree);
 183         return;
 184 }
 185
 186
 187 void
 188 dissect_tns(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
 189 {
 190         proto_tree      *tns_tree = NULL, *ti;
 191         guint16 length;
 192         guint16 type;
 193
 194         if (check_col(fd, COL_PROTOCOL))
 195         col_add_str(fd, COL_PROTOCOL, "TNS");
 196
 197         if (check_col(fd, COL_INFO))
 198         {
 199                 col_add_fstr(fd, COL_INFO, "%s",
 200                         (pi.match_port == pi.destport) ? "Request" : "Response");
 201         }
 202
 203         if (tree)
 204         {
 205                 ti = proto_tree_add_item(tree, proto_tns, offset, END_OF_FRAME, NULL);
 206                 tns_tree = proto_item_add_subtree(ti, ett_tns);
 207
 208                 if (pi.match_port == pi.destport)
 209                 {
 210                         proto_tree_add_item_hidden(tns_tree, hf_tns_request,
 211                            offset, END_OF_FRAME, TRUE);
 212                         proto_tree_add_text(tns_tree, offset,
 213                                 END_OF_FRAME, "Request: <opaque data>" );
 214                 }
 215                 else
 216                 {
 217                         proto_tree_add_item_hidden(tns_tree, hf_tns_response,
 218                                 offset, END_OF_FRAME, TRUE);
 219                         proto_tree_add_text(tns_tree, offset,
 220                                 END_OF_FRAME, "Response: <opaque data>");
 221                 }
 222         }
 223
 224                 /* check to make sure length is present */
 225         if ( ! BYTES_ARE_IN_FRAME(offset, 2)) return;
 226
 227         length = pntohs(&pd[offset]);
 228         if (tree)
 229         {
 230                 proto_tree_add_item(tns_tree, hf_tns_length,
 231                         offset, 2, length);
 232         }
 233         TRUNC(length);
 234         offset += 2;
 235
 236         TRUNC(2);
 237         if ( tree )
 238         {
 239                 proto_tree_add_item(tns_tree, hf_tns_packet_checksum,
 240                         offset, 2, pntohs(&pd[offset]));
 241         }
 242         offset += 2;
 243
 244         TRUNC(2);
 245         type = pd[offset];
 246         if ( tree )
 247         {
 248                 proto_tree_add_item(tns_tree, hf_tns_packet_type,
 249                         offset, 1, type);
 250         }
 251         offset += 1;
 252
 253         if ( check_col(fd, COL_INFO))
 254         {
 255                 col_append_fstr(fd, COL_INFO, ", %s (%d)",
 256                         val_to_str(type, tns_type_vals, "Unknown"), type);
 257         }
 258
 259         TRUNC(1);
 260         if ( tree )
 261         {
 262                 proto_tree_add_item(tns_tree, hf_tns_reserved_byte,
 263                         offset, 1, &pd[offset]);
 264         }
 265         offset += 1;
 266
 267         TRUNC(2);
 268         if ( tree )
 269         {
 270                 proto_tree_add_item(tns_tree, hf_tns_header_checksum,
 271                         offset, 2, pntohs(&pd[offset]));
 272         }
 273         offset += 2;
 274
 275         switch (type)
 276         {
 277                 case TNS_TYPE_CONNECT:
 278                         dissect_tns_connect(pd,offset,fd,tree,tns_tree);
 279                         break;
 280                 case TNS_TYPE_ACCEPT:
 281                         dissect_tns_accept(pd,offset,fd,tree,tns_tree);
 282                         break;
 283                 case TNS_TYPE_DATA:
 284                         dissect_tns_data(pd,offset,fd,tree,tns_tree);
 285                         break;
 286                 default:
 287                         dissect_data(pd,offset,fd,tns_tree);
 288         }
 289 }
 290
 291 void proto_register_tns(void)
 292 {
 293         static hf_register_info hf[] = {
 294                 { &hf_tns_sns, {
 295                         "Secure Network Services", "tns.sns", FT_BOOLEAN, BASE_NONE,
 296                         NULL, 0x0, "Secure Network Services" }},
 297                 { &hf_tns_connect, {
 298                         "Connect", "tns.connect", FT_BOOLEAN, BASE_NONE,
 299                         NULL, 0x0, "Connect" }},
 300                 { &hf_tns_response, {
 301                         "Response", "tns.response", FT_BOOLEAN, BASE_NONE,
 302                         NULL, 0x0, "TRUE if TNS response" }},
 303                 { &hf_tns_request, {
 304                         "Request", "tns.request", FT_BOOLEAN, BASE_NONE,
 305                         NULL, 0x0, "TRUE if TNS request" }},
 306                 { &hf_tns_length, {
 307                         "Packet Length", "tns.length", FT_UINT32, BASE_NONE,
 308                         NULL, 0x0, "Length of TNS packet" }},
 309                 { &hf_tns_packet_checksum, {
 310                         "Packet Checksum", "tns.packet_checksum", FT_UINT16, BASE_HEX,
 311                         NULL, 0x0, "Checksum of Packet Data" }},
 312                 { &hf_tns_header_checksum, {
 313                         "Header Checksum", "tns.header_checksum", FT_UINT16, BASE_HEX,
 314                         NULL, 0x0, "Checksum of Header Data" }},
 315                 { &hf_tns_data_flag, {
 316                         "Data Flag", "tns.data_flag", FT_UINT16, BASE_HEX,
 317                         NULL, 0x0, "Data Flag" }},
 318                 { &hf_tns_version, {
 319                         "Version", "tns.version", FT_UINT16, BASE_DEC,
 320                         NULL, 0x0, "Version" }},
 321                 { &hf_tns_compat_version, {
 322                         "Version (Compatible)", "tns.compat_version", FT_UINT16, BASE_DEC,
 323                         NULL, 0x0, "Version (Compatible)" }},
 324                 { &hf_tns_service_options, {
 325                         "Service Options", "tns.service_options", FT_UINT16, BASE_HEX,
 326                         NULL, 0x0, "Service Options" }},
 327                 { &hf_tns_reserved_byte, {
 328                         "Reserved Byte", "tns.reserved_byte", FT_BYTES, BASE_HEX,
 329                         NULL, 0x0, "Reserved Byte" }},
 330                 { &hf_tns_packet_type, {
 331                         "Packet Type", "tns.type", FT_UINT8, BASE_NONE,
 332                         VALS(tns_type_vals), 0x0, "Type of TNS packet" }}
 333         };
 334
 335         static gint *ett[] = {
 336                 &ett_tns,
 337                 &ett_tns_sns,
 338                 &ett_tns_connect,
 339                 &ett_sql
 340         };
 341         proto_tns = proto_register_protocol(
 342                 "Transparent Network Substrate Protocol", "tns");
 343         proto_register_field_array(proto_tns, hf, array_length(hf));
 344         proto_register_subtree_array(ett, array_length(ett));
 345 }