/* packet-dop.c
* Routines for X.501 (DSA Operational Attributes) packet dissection
* Graeme Lunt 2005
*
* $Id: packet-dop-template.c 23331 2007-11-01 19:36:39Z etxrab $
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/conversation.h>
#include <epan/oids.h>
#include <epan/asn1.h>
#include <epan/expert.h>
#include <stdio.h>
#include <string.h>
#include "packet-ber.h"
#include "packet-acse.h"
#include "packet-ros.h"
#include "packet-x509sat.h"
#include "packet-x509af.h"
#include "packet-x509if.h"
#include "packet-dap.h"
#include "packet-dsp.h"
#include "packet-crmf.h"
#include "packet-dop.h"
#define PNAME "X.501 Directory Operational Binding Management Protocol"
#define PSNAME "DOP"
#define PFNAME "dop"
static guint global_dop_tcp_port = 102;
static guint tcp_port = 0;
static dissector_handle_t tpkt_handle = NULL;
void prefs_register_dop(void); /* forwad declaration for use in preferences registration */
/* Initialize the protocol and registered fields */
int proto_dop = -1;
static struct SESSION_DATA_STRUCTURE* session = NULL;
static const char *binding_type = NULL; /* binding_type */
static int call_dop_oid_callback(char *base_string, tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, char *col_info);
#include "packet-dop-hf.c"
/* Initialize the subtree pointers */
static gint ett_dop = -1;
static gint ett_dop_unknown = -1;
#include "packet-dop-ett.c"
/* Dissector table */
static dissector_table_t dop_dissector_table;
static void append_oid(packet_info *pinfo, const char *oid)
{
const char *name = NULL;
if(check_col(pinfo->cinfo, COL_INFO)) {
name = oid_resolved_from_string(oid);
col_append_fstr(pinfo->cinfo, COL_INFO, " %s", name ? name : oid);
}
}
#include "packet-dop-fn.c"
static int
call_dop_oid_callback(char *base_string, tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, char *col_info)
{
char* binding_param;
binding_param = ep_strdup_printf("%s.%s", base_string, binding_type ? binding_type : "");
if (col_info && (check_col(pinfo->cinfo, COL_INFO)))
col_append_fstr(pinfo->cinfo, COL_INFO, " %s", col_info);
if (dissector_try_string(dop_dissector_table, binding_param, tvb, pinfo, tree)) {
offset += tvb_length_remaining (tvb, offset);
} else {
proto_item *item=NULL;
proto_tree *next_tree=NULL;
item = proto_tree_add_text(tree, tvb, 0, tvb_length_remaining(tvb, offset), "Dissector for parameter %s OID:%s not implemented. Contact Wireshark developers if you want this supported", base_string, binding_type ? binding_type : "<empty>");
if (item) {
next_tree = proto_item_add_subtree(item, ett_dop_unknown);
}
offset = dissect_unknown_ber(pinfo, tvb, offset, next_tree);
expert_add_info_format(pinfo, item, PI_UNDECODED, PI_WARN, "Unknown binding-parameter");
}
return offset;
}
/*
* Dissect DOP PDUs inside a ROS PDUs
*/
static void
dissect_dop(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
{
int offset = 0;
int old_offset;
proto_item *item=NULL;
proto_tree *tree=NULL;
int (*dop_dissector)(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) = NULL;
char *dop_op_name;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
/* do we have operation information from the ROS dissector? */
if( !pinfo->private_data ){
if(parent_tree){
proto_tree_add_text(parent_tree, tvb, offset, -1,
"Internal error: can't get operation information from ROS dissector.");
}
return ;
} else {
session = ( (struct SESSION_DATA_STRUCTURE*)(pinfo->private_data) );
}
if(parent_tree){
item = proto_tree_add_item(parent_tree, proto_dop, tvb, 0, -1, FALSE);
tree = proto_item_add_subtree(item, ett_dop);
}
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DOP");
if (check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
switch(session->ros_op & ROS_OP_MASK) {
case (ROS_OP_BIND | ROS_OP_ARGUMENT): /* BindInvoke */
dop_dissector = dissect_dop_DSAOperationalManagementBindArgument;
dop_op_name = "DSA-Operational-Bind-Argument";
break;
case (ROS_OP_BIND | ROS_OP_RESULT): /* BindResult */
dop_dissector = dissect_dop_DSAOperationalManagementBindResult;
dop_op_name = "DSA-Operational-Bind-Result";
break;
case (ROS_OP_BIND | ROS_OP_ERROR): /* BindError */
dop_dissector = dissect_dop_DSAOperationalManagementBindError;
dop_op_name = "DSA-Operational-Management-Bind-Error";
break;
case (ROS_OP_INVOKE | ROS_OP_ARGUMENT): /* Invoke Argument */
switch(session->ros_op & ROS_OP_OPCODE_MASK) {
case 100: /* establish */
dop_dissector = dissect_dop_EstablishOperationalBindingArgument;
dop_op_name = "Establish-Operational-Binding-Argument";
break;
case 101: /* terminate */
dop_dissector = dissect_dop_TerminateOperationalBindingArgument;
dop_op_name = "Terminate-Operational-Binding-Argument";
break;
case 102: /* modify */
dop_dissector = dissect_dop_ModifyOperationalBindingArgument;
dop_op_name = "Modify-Operational-Binding-Argument";
break;
default:
proto_tree_add_text(tree, tvb, offset, -1,"Unsupported DOP Argument opcode (%d)",
session->ros_op & ROS_OP_OPCODE_MASK);
break;
}
break;
case (ROS_OP_INVOKE | ROS_OP_RESULT): /* Return Result */
switch(session->ros_op & ROS_OP_OPCODE_MASK) {
case 100: /* establish */
dop_dissector = dissect_dop_EstablishOperationalBindingResult;
dop_op_name = "Establish-Operational-Binding-Result";
break;
case 101: /* terminate */
dop_dissector = dissect_dop_TerminateOperationalBindingResult;
dop_op_name = "Terminate-Operational-Binding-Result";
break;
case 102: /* modify */
dop_dissector = dissect_dop_ModifyOperationalBindingResult;
dop_op_name = "Modify-Operational-Binding-Result";
break;
default:
proto_tree_add_text(tree, tvb, offset, -1,"Unsupported DOP Result opcode (%d)",
session->ros_op & ROS_OP_OPCODE_MASK);
break;
}
break;
case (ROS_OP_INVOKE | ROS_OP_ERROR): /* Return Error */
switch(session->ros_op & ROS_OP_OPCODE_MASK) {
case 100: /* operational-binding */
dop_dissector = dissect_dop_OpBindingErrorParam;
dop_op_name = "Operational-Binding-Error";
break;
default:
proto_tree_add_text(tree, tvb, offset, -1,"Unsupported DOP Error opcode (%d)",
session->ros_op & ROS_OP_OPCODE_MASK);
break;
}
break;
default:
proto_tree_add_text(tree, tvb, offset, -1,"Unsupported DOP PDU");
return;
}
if(dop_dissector) {
if (check_col(pinfo->cinfo, COL_INFO))
col_set_str(pinfo->cinfo, COL_INFO, dop_op_name);
while (tvb_reported_length_remaining(tvb, offset) > 0){
old_offset=offset;
offset=(*dop_dissector)(FALSE, tvb, offset, &asn1_ctx, tree, -1);
if(offset == old_offset){
proto_tree_add_text(tree, tvb, offset, -1,"Internal error, zero-byte DOP PDU");
offset = tvb_length(tvb);
break;
}
}
}
}
/*--- proto_register_dop -------------------------------------------*/
void proto_register_dop(void) {
/* List of fields */
static hf_register_info hf[] =
{
#include "packet-dop-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_dop,
&ett_dop_unknown,
#include "packet-dop-ettarr.c"
};
module_t *dop_module;
/* Register protocol */
proto_dop = proto_register_protocol(PNAME, PSNAME, PFNAME);
register_dissector("dop", dissect_dop, proto_dop);
dop_dissector_table = register_dissector_table("dop.oid", "DOP OID Dissectors", FT_STRING, BASE_NONE);
/* Register fields and subtrees */
proto_register_field_array(proto_dop, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register our configuration options for DOP, particularly our port */
#ifdef PREFERENCE_GROUPING
dop_module = prefs_register_protocol_subtree("OSI/X.500", proto_dop, prefs_register_dop);
#else
dop_module = prefs_register_protocol(proto_dop, prefs_register_dop);
#endif
prefs_register_uint_preference(dop_module, "tcp.port", "DOP TCP Port",
"Set the port for DOP operations (if other"
" than the default of 102)",
10, &global_dop_tcp_port);
}
/*--- proto_reg_handoff_dop --- */
void proto_reg_handoff_dop(void) {
dissector_handle_t handle = NULL;
#include "packet-dop-dis-tab.c"
/* APPLICATION CONTEXT */
oid_add_from_string("id-ac-directory-operational-binding-management","2.5.3.3");
/* ABSTRACT SYNTAXES */
/* Register DOP with ROS (with no use of RTSE) */
if((handle = find_dissector("dop"))) {
register_ros_oid_dissector_handle("2.5.9.4", handle, 0, "id-as-directory-operational-binding-management", FALSE);
}
/* BINDING TYPES */
oid_add_from_string("shadow-agreement","2.5.19.1");
oid_add_from_string("hierarchical-agreement","2.5.19.2");
oid_add_from_string("non-specific-hierarchical-agreement","2.5.19.3");
/* ACCESS CONTROL SCHEMES */
oid_add_from_string("basic-ACS","2.5.28.1");
oid_add_from_string("simplified-ACS","2.5.28.2");
oid_add_from_string("ruleBased-ACS","2.5.28.3");
oid_add_from_string("ruleAndBasic-ACS","2.5.28.4");
oid_add_from_string("ruleAndSimple-ACS","2.5.28.5");
/* ADMINISTRATIVE ROLES */
oid_add_from_string("id-ar-autonomousArea","2.5.23.1");
oid_add_from_string("id-ar-accessControlSpecificArea","2.5.23.2");
oid_add_from_string("id-ar-accessControlInnerArea","2.5.23.3");
oid_add_from_string("id-ar-subschemaAdminSpecificArea","2.5.23.4");
oid_add_from_string("id-ar-collectiveAttributeSpecificArea","2.5.23.5");
oid_add_from_string("id-ar-collectiveAttributeInnerArea","2.5.23.6");
oid_add_from_string("id-ar-contextDefaultSpecificArea","2.5.23.7");
oid_add_from_string("id-ar-serviceSpecificArea","2.5.23.8");
/* remember the tpkt handler for change in preferences */
tpkt_handle = find_dissector("tpkt");
}
void prefs_register_dop(void) {
/* de-register the old port */
/* port 102 is registered by TPKT - don't undo this! */
if((tcp_port != 102) && tpkt_handle)
dissector_delete("tcp.port", tcp_port, tpkt_handle);
/* Set our port number for future use */
tcp_port = global_dop_tcp_port;
if((tcp_port > 0) && (tcp_port != 102) && tpkt_handle)
dissector_add("tcp.port", global_dop_tcp_port, tpkt_handle);
}
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