asn1/p1/packet-p1-template.c

   1 /* packet-p1.c
   2  * Routines for X.411 (X.400 Message Transfer)  packet dissection
   3  * Graeme Lunt 2005
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #include "config.h"
  27
  28 #include <glib.h>
  29 #include <epan/packet.h>
  30 #include <epan/prefs.h>
  31 #include <epan/oids.h>
  32 #include <epan/asn1.h>
  33 #include <epan/expert.h>
  34 #include <epan/wmem/wmem.h>
  35
  36 #include "packet-ber.h"
  37 #include "packet-acse.h"
  38 #include "packet-ros.h"
  39 #include "packet-rtse.h"
  40
  41 #include "packet-x509af.h"
  42 #include "packet-x509ce.h"
  43 #include "packet-x509if.h"
  44 #include "packet-x509sat.h"
  45
  46 #include "packet-p1.h"
  47 #include <epan/strutil.h>
  48
  49 #define PNAME  "X.411 Message Transfer Service"
  50 #define PSNAME "P1"
  51 #define PFNAME "p1"
  52
  53 static guint global_p1_tcp_port = 102;
  54 static dissector_handle_t tpkt_handle;
  55 static void prefs_register_p1(void); /* forward declaration for use in preferences registration */
  56
  57 /* Initialize the protocol and registered fields */
  58 static int proto_p1 = -1;
  59 static int proto_p3 = -1;
  60
  61 static int hf_p1_MTS_APDU_PDU = -1;
  62 static int hf_p1_MTABindArgument_PDU = -1;
  63 static int hf_p1_MTABindResult_PDU = -1;
  64 static int hf_p1_MTABindError_PDU = -1;
  65
  66 #include "packet-p1-hf.c"
  67
  68 /* Initialize the subtree pointers */
  69 static gint ett_p1 = -1;
  70 static gint ett_p3 = -1;
  71 static gint ett_p1_content_unknown = -1;
  72 static gint ett_p1_bilateral_information = -1;
  73 static gint ett_p1_additional_information = -1;
  74 static gint ett_p1_unknown_standard_extension = -1;
  75 static gint ett_p1_unknown_extension_attribute_type = -1;
  76 static gint ett_p1_unknown_tokendata_type = -1;
  77 #include "packet-p1-ett.c"
  78
  79 static expert_field ei_p1_unknown_extension_attribute_type = EI_INIT;
  80 static expert_field ei_p1_unknown_standard_extension = EI_INIT;
  81 static expert_field ei_p1_unknown_built_in_content_type = EI_INIT;
  82 static expert_field ei_p1_unknown_tokendata_type = EI_INIT;
  83
  84 /* Dissector tables */
  85 static dissector_table_t p1_extension_dissector_table;
  86 static dissector_table_t p1_extension_attribute_dissector_table;
  87 static dissector_table_t p1_tokendata_dissector_table;
  88
  89 #include "packet-p1-table.c"   /* operation and error codes */
  90
  91 typedef struct p1_address_ctx {
  92         gboolean do_address;
  93         const char *content_type_id;
  94         gboolean report_unknown_content_type;
  95         wmem_strbuf_t* oraddress;
  96 } p1_address_ctx_t;
  97
  98 static void set_do_address(asn1_ctx_t* actx, gboolean do_address)
  99 {
 100         p1_address_ctx_t* ctx;
 101
 102         if (actx->subtree.tree_ctx == NULL) {
 103                 actx->subtree.tree_ctx = wmem_new0(wmem_packet_scope(), p1_address_ctx_t);
 104         }
 105
 106         ctx = (p1_address_ctx_t*)actx->subtree.tree_ctx;
 107         ctx->do_address = do_address;
 108 }
 109
 110 static void do_address(const char* addr, tvbuff_t* tvb_string, asn1_ctx_t* actx)
 111 {
 112         p1_address_ctx_t* ctx = (p1_address_ctx_t*)actx->subtree.tree_ctx;
 113
 114         if (ctx && ctx->do_address) {
 115                 if (addr) {
 116                         wmem_strbuf_append(ctx->oraddress, addr);
 117                 }
 118                 if (tvb_string) {
 119                         wmem_strbuf_append(ctx->oraddress, tvb_format_text(tvb_string, 0, tvb_length(tvb_string)));
 120                 }
 121         }
 122
 123 }
 124
 125 static void do_address_str(const char* addr, tvbuff_t* tvb_string, asn1_ctx_t* actx)
 126 {
 127         wmem_strbuf_t *ddatype = (wmem_strbuf_t *)actx->value_ptr;
 128         p1_address_ctx_t* ctx = (p1_address_ctx_t*)actx->subtree.tree_ctx;
 129
 130         do_address(addr, tvb_string, actx);
 131
 132         if (ctx && ctx->do_address && ddatype && tvb_string)
 133                 wmem_strbuf_append(ddatype, tvb_format_text(tvb_string, 0, tvb_length(tvb_string)));
 134 }
 135
 136 static void do_address_str_tree(const char* addr, tvbuff_t* tvb_string, asn1_ctx_t* actx, proto_tree* tree)
 137 {
 138         wmem_strbuf_t *ddatype = (wmem_strbuf_t *)actx->value_ptr;
 139         p1_address_ctx_t* ctx = (p1_address_ctx_t*)actx->subtree.tree_ctx;
 140
 141         do_address(addr, tvb_string, actx);
 142
 143         if (ctx && ctx->do_address && tvb_string && ddatype) {
 144                 if (wmem_strbuf_get_len(ddatype) > 0) {
 145                         proto_item_append_text (tree, " (%s=%s)", wmem_strbuf_get_str(ddatype), tvb_format_text(tvb_string, 0, tvb_length(tvb_string)));
 146                 }
 147         }
 148 }
 149
 150 #include "packet-p1-fn.c"
 151
 152 #include "packet-p1-table11.c" /* operation argument/result dissectors */
 153 #include "packet-p1-table21.c" /* error dissector */
 154
 155 static const ros_info_t p3_ros_info = {
 156   "P3",
 157   &proto_p3,
 158   &ett_p3,
 159   p3_opr_code_string_vals,
 160   p3_opr_tab,
 161   p3_err_code_string_vals,
 162   p3_err_tab
 163 };
 164
 165 void p1_initialize_content_globals (asn1_ctx_t* actx, proto_tree *tree, gboolean report_unknown_cont_type)
 166 {
 167         p1_address_ctx_t* ctx;
 168
 169         if (actx->subtree.tree_ctx == NULL) {
 170                 actx->subtree.tree_ctx = wmem_new0(wmem_packet_scope(), p1_address_ctx_t);
 171         }
 172
 173         ctx = (p1_address_ctx_t*)actx->subtree.tree_ctx;
 174
 175         actx->subtree.top_tree = tree;
 176         actx->external.direct_reference = NULL;
 177         ctx->content_type_id = NULL;
 178         ctx->report_unknown_content_type = report_unknown_cont_type;
 179 }
 180
 181 const char* p1_get_last_oraddress (asn1_ctx_t* actx)
 182 {
 183         p1_address_ctx_t* ctx;
 184
 185         if ((actx == NULL) || (actx->subtree.tree_ctx == NULL))
 186                 return "";
 187
 188         ctx = (p1_address_ctx_t*)actx->subtree.tree_ctx;
 189         if (wmem_strbuf_get_len(ctx->oraddress) <= 0)
 190                 return "";
 191
 192         return wmem_strbuf_get_str(ctx->oraddress);
 193 }
 194
 195 /*
 196  * Dissect P1 MTS APDU
 197  */
 198 void
 199 dissect_p1_mts_apdu (tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
 200 {
 201         proto_item *item=NULL;
 202         proto_tree *tree=NULL;
 203         asn1_ctx_t asn1_ctx;
 204         asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
 205
 206         /* save parent_tree so subdissectors can create new top nodes */
 207         p1_initialize_content_globals (&asn1_ctx, parent_tree, TRUE);
 208
 209         if(parent_tree){
 210                 item = proto_tree_add_item(parent_tree, proto_p1, tvb, 0, -1, ENC_NA);
 211                 tree = proto_item_add_subtree(item, ett_p1);
 212         }
 213
 214         col_set_str(pinfo->cinfo, COL_PROTOCOL, "P1");
 215         col_set_str(pinfo->cinfo, COL_INFO, "Transfer");
 216
 217         dissect_p1_MTS_APDU (FALSE, tvb, 0, &asn1_ctx, tree, hf_p1_MTS_APDU_PDU);
 218         p1_initialize_content_globals (&asn1_ctx, NULL, FALSE);
 219 }
 220
 221 /*
 222 * Dissect P1 PDUs inside a PPDU.
 223 */
 224 static int
 225 dissect_p1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void* data)
 226 {
 227         int offset = 0;
 228         int old_offset;
 229         proto_item *item;
 230         proto_tree *tree;
 231         struct SESSION_DATA_STRUCTURE* session;
 232         int (*p1_dissector)(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index _U_) = NULL;
 233         const char *p1_op_name;
 234         int hf_p1_index = -1;
 235         asn1_ctx_t asn1_ctx;
 236         asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
 237
 238         /* save parent_tree so subdissectors can create new top nodes */
 239         p1_initialize_content_globals (&asn1_ctx, parent_tree, TRUE);
 240
 241         /* do we have operation information from the ROS dissector?  */
 242         if( data == NULL ){
 243                 if(parent_tree){
 244                         proto_tree_add_text(parent_tree, tvb, offset, -1,
 245                                 "Internal error: can't get operation information from ROS dissector.");
 246                 }
 247                 return 0;
 248         }
 249
 250         session  = ( (struct SESSION_DATA_STRUCTURE*)data );
 251
 252         asn1_ctx.private_data = session;
 253
 254         item = proto_tree_add_item(parent_tree, proto_p1, tvb, 0, -1, ENC_NA);
 255         tree = proto_item_add_subtree(item, ett_p1);
 256
 257         col_set_str(pinfo->cinfo, COL_PROTOCOL, "P1");
 258         col_clear(pinfo->cinfo, COL_INFO);
 259
 260         switch(session->ros_op & ROS_OP_MASK) {
 261         case (ROS_OP_BIND | ROS_OP_ARGUMENT):   /*  BindInvoke */
 262           p1_dissector = dissect_p1_MTABindArgument;
 263           p1_op_name = "Bind-Argument";
 264           hf_p1_index = hf_p1_MTABindArgument_PDU;
 265           break;
 266         case (ROS_OP_BIND | ROS_OP_RESULT):     /*  BindResult */
 267           p1_dissector = dissect_p1_MTABindResult;
 268           p1_op_name = "Bind-Result";
 269           hf_p1_index = hf_p1_MTABindResult_PDU;
 270           break;
 271         case (ROS_OP_BIND | ROS_OP_ERROR):      /*  BindError */
 272           p1_dissector = dissect_p1_MTABindError;
 273           p1_op_name = "Bind-Error";
 274           hf_p1_index = hf_p1_MTABindError_PDU;
 275           break;
 276         case (ROS_OP_INVOKE | ROS_OP_ARGUMENT): /*  Invoke Argument */
 277           p1_dissector = dissect_p1_MTS_APDU;
 278           p1_op_name = "Transfer";
 279           hf_p1_index = hf_p1_MTS_APDU_PDU;
 280           break;
 281         default:
 282           proto_tree_add_text(tree, tvb, offset, -1,"Unsupported P1 PDU");
 283           return tvb_length(tvb);
 284         }
 285
 286         col_set_str(pinfo->cinfo, COL_INFO, p1_op_name);
 287
 288         while (tvb_reported_length_remaining(tvb, offset) > 0){
 289                 old_offset=offset;
 290                 offset=(*p1_dissector)(FALSE, tvb, offset, &asn1_ctx , tree, hf_p1_index);
 291                 if(offset == old_offset){
 292                         proto_tree_add_text(tree, tvb, offset, -1,"Internal error, zero-byte P1 PDU");
 293                         break;
 294                 }
 295         }
 296         p1_initialize_content_globals (&asn1_ctx, NULL, FALSE);
 297         return tvb_length(tvb);
 298 }
 299
 300
 301 /*--- proto_register_p1 -------------------------------------------*/
 302 void proto_register_p1(void) {
 303
 304   /* List of fields */
 305   static hf_register_info hf[] =
 306   {
 307       /* "Created by defining PDU in .cnf */
 308     { &hf_p1_MTABindArgument_PDU,
 309       { "MTABindArgument", "p1.MTABindArgument",
 310         FT_UINT32, BASE_DEC, VALS(p1_MTABindArgument_vals), 0,
 311         "p1.MTABindArgument", HFILL }},
 312     { &hf_p1_MTABindResult_PDU,
 313       { "MTABindResult", "p1.MTABindResult",
 314         FT_UINT32, BASE_DEC, VALS(p1_MTABindResult_vals), 0,
 315         "p1.MTABindResult", HFILL }},
 316     { &hf_p1_MTABindError_PDU,
 317       { "MTABindError", "p1.MTABindError",
 318         FT_UINT32, BASE_DEC, VALS(p1_MTABindError_vals), 0,
 319         "p1.MTABindError", HFILL }},
 320     { &hf_p1_MTS_APDU_PDU,
 321       { "MTS-APDU", "p1.MTS_APDU",
 322         FT_UINT32, BASE_DEC, VALS(p1_MTS_APDU_vals), 0,
 323         "p1.MTS_APDU", HFILL }},
 324
 325 #include "packet-p1-hfarr.c"
 326   };
 327
 328   /* List of subtrees */
 329   static gint *ett[] = {
 330     &ett_p1,
 331     &ett_p3,
 332     &ett_p1_content_unknown,
 333     &ett_p1_bilateral_information,
 334     &ett_p1_additional_information,
 335     &ett_p1_unknown_standard_extension,
 336     &ett_p1_unknown_extension_attribute_type,
 337     &ett_p1_unknown_tokendata_type,
 338 #include "packet-p1-ettarr.c"
 339   };
 340
 341   static ei_register_info ei[] = {
 342      { &ei_p1_unknown_extension_attribute_type, { "p1.unknown.extension_attribute_type", PI_UNDECODED, PI_WARN, "Unknown extension-attribute-type", EXPFILL }},
 343      { &ei_p1_unknown_standard_extension, { "p1.unknown.standard_extension", PI_UNDECODED, PI_WARN, "Unknown standard-extension", EXPFILL }},
 344      { &ei_p1_unknown_built_in_content_type, { "p1.unknown.built_in_content_type", PI_UNDECODED, PI_WARN, "P1 Unknown Content (unknown built-in content-type)", EXPFILL }},
 345      { &ei_p1_unknown_tokendata_type, { "p1.unknown.tokendata_type", PI_UNDECODED, PI_WARN, "Unknown tokendata-type", EXPFILL }},
 346   };
 347
 348   expert_module_t* expert_p1;
 349   module_t *p1_module;
 350
 351   /* Register protocol */
 352   proto_p1 = proto_register_protocol(PNAME, PSNAME, PFNAME);
 353   new_register_dissector("p1", dissect_p1, proto_p1);
 354
 355   proto_p3 = proto_register_protocol("X.411 Message Access Service", "P3", "p3");
 356
 357   /* Register fields and subtrees */
 358   proto_register_field_array(proto_p1, hf, array_length(hf));
 359   proto_register_subtree_array(ett, array_length(ett));
 360   expert_p1 = expert_register_protocol(proto_p1);
 361   expert_register_field_array(expert_p1, ei, array_length(ei));
 362
 363   p1_extension_dissector_table = register_dissector_table("p1.extension", "P1-EXTENSION", FT_UINT32, BASE_DEC);
 364   p1_extension_attribute_dissector_table = register_dissector_table("p1.extension-attribute", "P1-EXTENSION-ATTRIBUTE", FT_UINT32, BASE_DEC);
 365   p1_tokendata_dissector_table = register_dissector_table("p1.tokendata", "P1-TOKENDATA", FT_UINT32, BASE_DEC);
 366
 367   /* Register our configuration options for P1, particularly our port */
 368
 369   p1_module = prefs_register_protocol_subtree("OSI/X.400", proto_p1, prefs_register_p1);
 370
 371   prefs_register_uint_preference(p1_module, "tcp.port", "P1 TCP Port",
 372                                  "Set the port for P1 operations (if other"
 373                                  " than the default of 102)",
 374                                  10, &global_p1_tcp_port);
 375
 376   register_ber_syntax_dissector("P1 Message", proto_p1, dissect_p1_mts_apdu);
 377 }
 378
 379
 380 /*--- proto_reg_handoff_p1 --- */
 381 void proto_reg_handoff_p1(void) {
 382   dissector_handle_t p1_handle;
 383
 384 #include "packet-p1-dis-tab.c"
 385
 386   /* APPLICATION CONTEXT */
 387
 388   oid_add_from_string("id-ac-mts-transfer","2.6.0.1.6");
 389
 390   /* ABSTRACT SYNTAXES */
 391
 392   p1_handle = find_dissector("p1");
 393   register_rtse_oid_dissector_handle("2.6.0.2.12", p1_handle, 0, "id-as-mta-rtse", TRUE);
 394   register_rtse_oid_dissector_handle("2.6.0.2.7", p1_handle, 0, "id-as-mtse", FALSE);
 395
 396   register_rtse_oid_dissector_handle("applicationProtocol.1", p1_handle, 0, "mts-transfer-protocol-1984", FALSE);
 397   register_rtse_oid_dissector_handle("applicationProtocol.12", p1_handle, 0, "mta-transfer-protocol", FALSE);
 398
 399   /* remember the tpkt handler for change in preferences */
 400   tpkt_handle = find_dissector("tpkt");
 401
 402   /* APPLICATION CONTEXT */
 403
 404   oid_add_from_string("id-ac-mts-access-88", id_ac_mts_access_88);
 405   oid_add_from_string("id-ac-mts-forced-access-88", id_ac_mts_forced_access_88);
 406   oid_add_from_string("id-ac-mts-access-94", id_ac_mts_access_94);
 407   oid_add_from_string("id-ac-mts-forced-access-94", id_ac_mts_forced_access_94);
 408
 409
 410   /* Register P3 with ROS */
 411   register_ros_protocol_info(id_as_msse, &p3_ros_info, 0, "id-as-msse", FALSE);
 412
 413   register_ros_protocol_info(id_as_mdse_88, &p3_ros_info, 0, "id-as-mdse-88", FALSE);
 414   register_ros_protocol_info(id_as_mdse_94, &p3_ros_info, 0, "id-as-mdse-94", FALSE);
 415
 416   register_ros_protocol_info(id_as_mase_88, &p3_ros_info, 0, "id-as-mase-88", FALSE);
 417   register_ros_protocol_info(id_as_mase_94, &p3_ros_info, 0, "id-as-mase-94", FALSE);
 418
 419   register_ros_protocol_info(id_as_mts, &p3_ros_info, 0, "id-as-mts", FALSE);
 420
 421 }
 422
 423 static void
 424 prefs_register_p1(void)
 425 {
 426   static guint tcp_port = 0;
 427
 428   /* de-register the old port */
 429   /* port 102 is registered by TPKT - don't undo this! */
 430   if((tcp_port > 0) && (tcp_port != 102) && tpkt_handle)
 431     dissector_delete_uint("tcp.port", tcp_port, tpkt_handle);
 432
 433   /* Set our port number for future use */
 434   tcp_port = global_p1_tcp_port;
 435
 436   if((tcp_port > 0) && (tcp_port != 102) && tpkt_handle)
 437     dissector_add_uint("tcp.port", tcp_port, tpkt_handle);
 438
 439 }