asn1/dop/packet-dop-template.c

   1 /* packet-dop.c
   2  * Routines for X.501 (DSA Operational Attributes)  packet dissection
   3  * Graeme Lunt 2005
   4  *
   5  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  22  */
  23
  24 #include "config.h"
  25
  26 #include <epan/packet.h>
  27 #include <epan/prefs.h>
  28 #include <epan/oids.h>
  29 #include <epan/asn1.h>
  30 #include <epan/expert.h>
  31
  32 #include "packet-ber.h"
  33 #include "packet-acse.h"
  34 #include "packet-ros.h"
  35
  36 #include "packet-x509sat.h"
  37 #include "packet-x509af.h"
  38 #include "packet-x509if.h"
  39 #include "packet-dap.h"
  40 #include "packet-dsp.h"
  41 #include "packet-crmf.h"
  42
  43
  44 #include "packet-dop.h"
  45
  46 #define PNAME  "X.501 Directory Operational Binding Management Protocol"
  47 #define PSNAME "DOP"
  48 #define PFNAME "dop"
  49
  50 void proto_register_dop(void);
  51 void proto_reg_handoff_dop(void);
  52
  53 static guint global_dop_tcp_port = 102;
  54 static dissector_handle_t tpkt_handle;
  55 static void prefs_register_dop(void); /* forward declaration for use in preferences registration */
  56
  57 /* Initialize the protocol and registered fields */
  58 static int proto_dop = -1;
  59
  60 static const char *binding_type = NULL; /* binding_type */
  61
  62 static int call_dop_oid_callback(const char *base_string, tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, const char *col_info, void* data);
  63
  64 #include "packet-dop-hf.c"
  65
  66 /* Initialize the subtree pointers */
  67 static gint ett_dop = -1;
  68 static gint ett_dop_unknown = -1;
  69 #include "packet-dop-ett.c"
  70
  71 static expert_field ei_dop_unknown_binding_parameter = EI_INIT;
  72 static expert_field ei_dop_unsupported_opcode = EI_INIT;
  73 static expert_field ei_dop_unsupported_errcode = EI_INIT;
  74 static expert_field ei_dop_unsupported_pdu = EI_INIT;
  75 static expert_field ei_dop_zero_pdu = EI_INIT;
  76
  77 /* Dissector table */
  78 static dissector_table_t dop_dissector_table;
  79
  80 static void append_oid(packet_info *pinfo, const char *oid)
  81 {
  82         const char *name = NULL;
  83
  84     name = oid_resolved_from_string(wmem_packet_scope(), oid);
  85     col_append_fstr(pinfo->cinfo, COL_INFO, " %s", name ? name : oid);
  86 }
  87
  88 #include "packet-dop-fn.c"
  89
  90 static int
  91 call_dop_oid_callback(const char *base_string, tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, const char *col_info, void* data)
  92 {
  93   char* binding_param;
  94
  95   binding_param = wmem_strdup_printf(wmem_packet_scope(), "%s.%s", base_string, binding_type ? binding_type : "");
  96
  97   col_append_fstr(pinfo->cinfo, COL_INFO, " %s", col_info);
  98
  99   if (dissector_try_string(dop_dissector_table, binding_param, tvb, pinfo, tree, data)) {
 100      offset = tvb_reported_length (tvb);
 101   } else {
 102      proto_item *item;
 103      proto_tree *next_tree;
 104
 105      next_tree = proto_tree_add_subtree_format(tree, tvb, 0, -1, ett_dop_unknown, &item,
 106          "Dissector for parameter %s OID:%s not implemented. Contact Wireshark developers if you want this supported", base_string, binding_type ? binding_type : "<empty>");
 107
 108      offset = dissect_unknown_ber(pinfo, tvb, offset, next_tree);
 109      expert_add_info(pinfo, item, &ei_dop_unknown_binding_parameter);
 110    }
 111
 112    return offset;
 113 }
 114
 115
 116 /*
 117 * Dissect DOP PDUs inside a ROS PDUs
 118 */
 119 static int
 120 dissect_dop(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void* data)
 121 {
 122         int offset = 0;
 123         int old_offset;
 124         proto_item *item;
 125         proto_tree *tree;
 126         struct SESSION_DATA_STRUCTURE* session;
 127         int (*dop_dissector)(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) = NULL;
 128         const char *dop_op_name;
 129         asn1_ctx_t asn1_ctx;
 130
 131         /* do we have operation information from the ROS dissector? */
 132         if (data == NULL)
 133                 return 0;
 134         session = (struct SESSION_DATA_STRUCTURE*)data;
 135
 136         asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
 137
 138         item = proto_tree_add_item(parent_tree, proto_dop, tvb, 0, -1, ENC_NA);
 139         tree = proto_item_add_subtree(item, ett_dop);
 140
 141         col_set_str(pinfo->cinfo, COL_PROTOCOL, "DOP");
 142         col_clear(pinfo->cinfo, COL_INFO);
 143
 144         asn1_ctx.private_data = session;
 145
 146         switch(session->ros_op & ROS_OP_MASK) {
 147         case (ROS_OP_BIND | ROS_OP_ARGUMENT):   /*  BindInvoke */
 148           dop_dissector = dissect_dop_DSAOperationalManagementBindArgument;
 149           dop_op_name = "DSA-Operational-Bind-Argument";
 150           break;
 151         case (ROS_OP_BIND | ROS_OP_RESULT):     /*  BindResult */
 152           dop_dissector = dissect_dop_DSAOperationalManagementBindResult;
 153           dop_op_name = "DSA-Operational-Bind-Result";
 154           break;
 155         case (ROS_OP_BIND | ROS_OP_ERROR):      /*  BindError */
 156           dop_dissector = dissect_dop_DSAOperationalManagementBindError;
 157           dop_op_name = "DSA-Operational-Management-Bind-Error";
 158           break;
 159         case (ROS_OP_INVOKE | ROS_OP_ARGUMENT): /*  Invoke Argument */
 160           switch(session->ros_op & ROS_OP_OPCODE_MASK) {
 161           case 100: /* establish */
 162             dop_dissector = dissect_dop_EstablishOperationalBindingArgument;
 163             dop_op_name = "Establish-Operational-Binding-Argument";
 164             break;
 165           case 101: /* terminate */
 166             dop_dissector = dissect_dop_TerminateOperationalBindingArgument;
 167             dop_op_name = "Terminate-Operational-Binding-Argument";
 168             break;
 169           case 102: /* modify */
 170             dop_dissector = dissect_dop_ModifyOperationalBindingArgument;
 171             dop_op_name = "Modify-Operational-Binding-Argument";
 172             break;
 173           default:
 174             proto_tree_add_expert_format(tree, pinfo, &ei_dop_unsupported_opcode, tvb, offset, -1,
 175                 "Unsupported DOP Argument opcode (%d)", session->ros_op & ROS_OP_OPCODE_MASK);
 176             break;
 177           }
 178           break;
 179         case (ROS_OP_INVOKE | ROS_OP_RESULT):   /*  Return Result */
 180           switch(session->ros_op & ROS_OP_OPCODE_MASK) {
 181           case 100: /* establish */
 182             dop_dissector = dissect_dop_EstablishOperationalBindingResult;
 183             dop_op_name = "Establish-Operational-Binding-Result";
 184             break;
 185           case 101: /* terminate */
 186             dop_dissector = dissect_dop_TerminateOperationalBindingResult;
 187             dop_op_name = "Terminate-Operational-Binding-Result";
 188             break;
 189           case 102: /* modify */
 190             dop_dissector = dissect_dop_ModifyOperationalBindingResult;
 191             dop_op_name = "Modify-Operational-Binding-Result";
 192             break;
 193           default:
 194             proto_tree_add_expert_format(tree, pinfo, &ei_dop_unsupported_opcode, tvb, offset, -1,
 195                     "Unsupported DOP Result opcode (%d)", session->ros_op & ROS_OP_OPCODE_MASK);
 196             break;
 197           }
 198           break;
 199         case (ROS_OP_INVOKE | ROS_OP_ERROR):    /*  Return Error */
 200           switch(session->ros_op & ROS_OP_OPCODE_MASK) {
 201           case 100: /* operational-binding */
 202             dop_dissector = dissect_dop_OpBindingErrorParam;
 203             dop_op_name = "Operational-Binding-Error";
 204             break;
 205           default:
 206             proto_tree_add_expert_format(tree, pinfo, &ei_dop_unsupported_errcode, tvb, offset, -1,
 207                 "Unsupported DOP Error opcode (%d)", session->ros_op & ROS_OP_OPCODE_MASK);
 208             break;
 209           }
 210           break;
 211         default:
 212           proto_tree_add_expert(tree, pinfo, &ei_dop_unsupported_pdu, tvb, offset, -1);
 213           return tvb_captured_length(tvb);
 214         }
 215
 216         if(dop_dissector) {
 217       col_set_str(pinfo->cinfo, COL_INFO, dop_op_name);
 218
 219           while (tvb_reported_length_remaining(tvb, offset) > 0){
 220             old_offset=offset;
 221             offset=(*dop_dissector)(FALSE, tvb, offset, &asn1_ctx, tree, -1);
 222             if(offset == old_offset){
 223               proto_tree_add_expert(tree, pinfo, &ei_dop_zero_pdu, tvb, offset, -1);
 224               break;
 225             }
 226           }
 227         }
 228
 229         return tvb_captured_length(tvb);
 230 }
 231
 232
 233
 234 /*--- proto_register_dop -------------------------------------------*/
 235 void proto_register_dop(void) {
 236
 237   /* List of fields */
 238   static hf_register_info hf[] =
 239   {
 240 #include "packet-dop-hfarr.c"
 241   };
 242
 243   /* List of subtrees */
 244   static gint *ett[] = {
 245     &ett_dop,
 246     &ett_dop_unknown,
 247 #include "packet-dop-ettarr.c"
 248   };
 249
 250   static ei_register_info ei[] = {
 251      { &ei_dop_unknown_binding_parameter, { "dop.unknown_binding_parameter", PI_UNDECODED, PI_WARN, "Unknown binding-parameter", EXPFILL }},
 252      { &ei_dop_unsupported_opcode, { "dop.unsupported_opcode", PI_UNDECODED, PI_WARN, "Unsupported DOP opcode", EXPFILL }},
 253      { &ei_dop_unsupported_errcode, { "dop.unsupported_errcode", PI_UNDECODED, PI_WARN, "Unsupported DOP errcode", EXPFILL }},
 254      { &ei_dop_unsupported_pdu, { "dop.unsupported_pdu", PI_UNDECODED, PI_WARN, "Unsupported DOP PDU", EXPFILL }},
 255      { &ei_dop_zero_pdu, { "dop.zero_pdu", PI_PROTOCOL, PI_ERROR, "Internal error, zero-byte DOP PDU", EXPFILL }},
 256   };
 257
 258   expert_module_t* expert_dop;
 259   module_t *dop_module;
 260
 261   /* Register protocol */
 262   proto_dop = proto_register_protocol(PNAME, PSNAME, PFNAME);
 263
 264   register_dissector("dop", dissect_dop, proto_dop);
 265
 266   dop_dissector_table = register_dissector_table("dop.oid", "DOP OID Dissectors", FT_STRING, BASE_NONE, DISSECTOR_TABLE_ALLOW_DUPLICATE);
 267
 268   /* Register fields and subtrees */
 269   proto_register_field_array(proto_dop, hf, array_length(hf));
 270   proto_register_subtree_array(ett, array_length(ett));
 271   expert_dop = expert_register_protocol(proto_dop);
 272   expert_register_field_array(expert_dop, ei, array_length(ei));
 273
 274   /* Register our configuration options for DOP, particularly our port */
 275
 276   dop_module = prefs_register_protocol_subtree("OSI/X.500", proto_dop, prefs_register_dop);
 277
 278   prefs_register_uint_preference(dop_module, "tcp.port", "DOP TCP Port",
 279                                  "Set the port for DOP operations (if other"
 280                                  " than the default of 102)",
 281                                  10, &global_dop_tcp_port);
 282
 283
 284 }
 285
 286
 287 /*--- proto_reg_handoff_dop --- */
 288 void proto_reg_handoff_dop(void) {
 289   dissector_handle_t dop_handle;
 290
 291 #include "packet-dop-dis-tab.c"
 292   /* APPLICATION CONTEXT */
 293
 294   oid_add_from_string("id-ac-directory-operational-binding-management","2.5.3.3");
 295
 296   /* ABSTRACT SYNTAXES */
 297
 298   /* Register DOP with ROS (with no use of RTSE) */
 299   dop_handle = find_dissector("dop");
 300   register_ros_oid_dissector_handle("2.5.9.4", dop_handle, 0, "id-as-directory-operational-binding-management", FALSE);
 301
 302   /* BINDING TYPES */
 303
 304   oid_add_from_string("shadow-agreement","2.5.19.1");
 305   oid_add_from_string("hierarchical-agreement","2.5.19.2");
 306   oid_add_from_string("non-specific-hierarchical-agreement","2.5.19.3");
 307
 308   /* ACCESS CONTROL SCHEMES */
 309   oid_add_from_string("basic-ACS","2.5.28.1");
 310   oid_add_from_string("simplified-ACS","2.5.28.2");
 311   oid_add_from_string("ruleBased-ACS","2.5.28.3");
 312   oid_add_from_string("ruleAndBasic-ACS","2.5.28.4");
 313   oid_add_from_string("ruleAndSimple-ACS","2.5.28.5");
 314
 315   /* ADMINISTRATIVE ROLES */
 316   oid_add_from_string("id-ar-autonomousArea","2.5.23.1");
 317   oid_add_from_string("id-ar-accessControlSpecificArea","2.5.23.2");
 318   oid_add_from_string("id-ar-accessControlInnerArea","2.5.23.3");
 319   oid_add_from_string("id-ar-subschemaAdminSpecificArea","2.5.23.4");
 320   oid_add_from_string("id-ar-collectiveAttributeSpecificArea","2.5.23.5");
 321   oid_add_from_string("id-ar-collectiveAttributeInnerArea","2.5.23.6");
 322   oid_add_from_string("id-ar-contextDefaultSpecificArea","2.5.23.7");
 323   oid_add_from_string("id-ar-serviceSpecificArea","2.5.23.8");
 324
 325   /* remember the tpkt handler for change in preferences */
 326   tpkt_handle = find_dissector("tpkt");
 327
 328 }
 329
 330 static void
 331 prefs_register_dop(void)
 332 {
 333   static guint tcp_port = 0;
 334
 335   /* de-register the old port */
 336   /* port 102 is registered by TPKT - don't undo this! */
 337   if((tcp_port > 0) && (tcp_port != 102) && tpkt_handle)
 338     dissector_delete_uint("tcp.port", tcp_port, tpkt_handle);
 339
 340   /* Set our port number for future use */
 341   tcp_port = global_dop_tcp_port;
 342
 343   if((tcp_port > 0) && (tcp_port != 102) && tpkt_handle)
 344     dissector_add_uint("tcp.port", tcp_port, tpkt_handle);
 345
 346 }