/* packet-dap.c
 * Routines for X.511 (X.500 Directory Asbtract Service) and X.519 DAP  packet dissection
 * Graeme Lunt 2005
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/expert.h>
#include <epan/oids.h>
#include <epan/asn1.h>

#include "packet-ber.h"
#include "packet-acse.h"
#include "packet-ros.h"
#include "packet-idmp.h"

#include "packet-x509if.h"
#include "packet-x509af.h"
#include "packet-x509sat.h"
#include "packet-crmf.h"

#include "packet-dsp.h"
#include "packet-disp.h"
#include "packet-dap.h"
#include <epan/strutil.h>

/* we don't have a separate dissector for X519 -
   most of DAP is defined in X511 */
#define PNAME  "X.519 Directory Access Protocol"
#define PSNAME "DAP"
#define PFNAME "dap"

void proto_register_dap(void);
void proto_reg_handoff_dap(void);

static guint global_dap_tcp_port = 102;
static dissector_handle_t tpkt_handle;
static void prefs_register_dap(void); /* forward declaration for use in preferences registration */


/* Initialize the protocol and registered fields */
static int proto_dap = -1;


#include "packet-dap-hf.c"

/* Initialize the subtree pointers */
static gint ett_dap = -1;
#include "packet-dap-ett.c"

static expert_field ei_dap_anonymous = EI_INIT;

#include "packet-dap-val.h"

#include "packet-dap-table.c"   /* operation and error codes */

#include "packet-dap-fn.c"

#include "packet-dap-table11.c" /* operation argument/result dissectors */
#include "packet-dap-table21.c" /* error dissector */

static const ros_info_t dap_ros_info = {
  "DAP",
  &proto_dap,
  &ett_dap,
  dap_opr_code_string_vals,
  dap_opr_tab,
  dap_err_code_string_vals,
  dap_err_tab
};


/*--- proto_register_dap -------------------------------------------*/
void proto_register_dap(void) {

  /* List of fields */
  static hf_register_info hf[] =
  {
#include "packet-dap-hfarr.c"
  };

  /* List of subtrees */
  static gint *ett[] = {
    &ett_dap,
#include "packet-dap-ettarr.c"
  };

  static ei_register_info ei[] = {
    { &ei_dap_anonymous, { "dap.anonymous", PI_PROTOCOL, PI_NOTE, "Anonymous", EXPFILL }},
  };

  module_t *dap_module;
  expert_module_t* expert_dap;

  /* Register protocol */
  proto_dap = proto_register_protocol(PNAME, PSNAME, PFNAME);

  /* Register fields and subtrees */
  proto_register_field_array(proto_dap, hf, array_length(hf));
  proto_register_subtree_array(ett, array_length(ett));
  expert_dap = expert_register_protocol(proto_dap);
  expert_register_field_array(expert_dap, ei, array_length(ei));

  /* Register our configuration options for DAP, particularly our port */

  dap_module = prefs_register_protocol_subtree("OSI/X.500", proto_dap, prefs_register_dap);

  prefs_register_uint_preference(dap_module, "tcp.port", "DAP TCP Port",
				 "Set the port for DAP operations (if other"
				 " than the default of 102)",
				 10, &global_dap_tcp_port);

}


/*--- proto_reg_handoff_dap --- */
void proto_reg_handoff_dap(void) {

  /* #include "packet-dap-dis-tab.c" */

  /* APPLICATION CONTEXT */

  oid_add_from_string("id-ac-directory-access","2.5.3.1");

  /* ABSTRACT SYNTAXES */

  /* Register DAP with ROS (with no use of RTSE) */
  register_ros_protocol_info("2.5.9.1", &dap_ros_info, 0, "id-as-directory-access", FALSE);

  register_idmp_protocol_info("2.5.33.0", &dap_ros_info, 0, "dap-ip");

  /* remember the tpkt handler for change in preferences */
  tpkt_handle = find_dissector("tpkt");

  /* AttributeValueAssertions */
  x509if_register_fmt(hf_dap_equality, "=");
  x509if_register_fmt(hf_dap_greaterOrEqual, ">=");
  x509if_register_fmt(hf_dap_lessOrEqual, "<=");
  x509if_register_fmt(hf_dap_approximateMatch, "=~");
  /* AttributeTypes */
  x509if_register_fmt(hf_dap_present, "= *");

}


static void
prefs_register_dap(void)
{
  static guint tcp_port = 0;

  /* de-register the old port */
  /* port 102 is registered by TPKT - don't undo this! */
  if((tcp_port > 0) && (tcp_port != 102) && tpkt_handle)
    dissector_delete_uint("tcp.port", tcp_port, tpkt_handle);

  /* Set our port number for future use */
  tcp_port = global_dap_tcp_port;

  if((tcp_port > 0) && (tcp_port != 102) && tpkt_handle)
    dissector_add_uint("tcp.port", global_dap_tcp_port, tpkt_handle);

}