/* packet-dsp.c
* Routines for X.518 (X.500 Distributed Operations) packet dissection
* Graeme Lunt 2005
*
* $Id: packet-dsp-template.c 23324 2007-10-31 21:24:16Z 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 <stdio.h>
#include <string.h>
#include "packet-ber.h"
#include "packet-acse.h"
#include "packet-ros.h"
#include "packet-x509if.h"
#include "packet-x509af.h"
#include "packet-x509sat.h"
#include "packet-dap.h"
#include "packet-dsp.h"
#define PNAME "X.519 Directory System Protocol"
#define PSNAME "DSP"
#define PFNAME "dsp"
static guint global_dsp_tcp_port = 102;
static guint tcp_port = 0;
static dissector_handle_t tpkt_handle = NULL;
void prefs_register_dsp(void); /* forwad declaration for use in preferences registration */
/* Initialize the protocol and registered fields */
int proto_dsp = -1;
static struct SESSION_DATA_STRUCTURE* session = NULL;
#include "packet-dsp-hf.c"
/* Initialize the subtree pointers */
static gint ett_dsp = -1;
#include "packet-dsp-ett.c"
#include "packet-dsp-fn.c"
/*
* Dissect X518 PDUs inside a ROS PDUs
*/
static void
dissect_dsp(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 (*dsp_dissector)(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_) = NULL;
char *dsp_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_dsp, tvb, 0, -1, FALSE);
tree = proto_item_add_subtree(item, ett_dsp);
}
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DAP");
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 */
dsp_dissector = dissect_dsp_DSASystemBindArgument;
dsp_op_name = "System-Bind-Argument";
break;
case (ROS_OP_BIND | ROS_OP_RESULT): /* BindResult */
dsp_dissector = dissect_dsp_DSASystemBindResult;
dsp_op_name = "System-Bind-Result";
break;
case (ROS_OP_BIND | ROS_OP_ERROR): /* BindError */
dsp_dissector = dissect_dsp_DSASystemBindError;
dsp_op_name = "System-Bind-Error";
break;
case (ROS_OP_INVOKE | ROS_OP_ARGUMENT): /* Invoke Argument */
switch(session->ros_op & ROS_OP_OPCODE_MASK) {
case 1: /* read */
dsp_dissector = dissect_dsp_ChainedReadArgument;
dsp_op_name = "Chained-Read-Argument";
break;
case 2: /* compare */
dsp_dissector = dissect_dsp_ChainedCompareArgument;
dsp_op_name = "Chained-Compare-Argument";
break;
case 3: /* abandon */
dsp_dissector = dissect_dsp_ChainedAbandonArgument;
dsp_op_name = "Chained-Abandon-Argument";
break;
case 4: /* list */
dsp_dissector = dissect_dsp_ChainedListArgument;
dsp_op_name = "Chained-List-Argument";
break;
case 5: /* search */
dsp_dissector = dissect_dsp_ChainedSearchArgument;
dsp_op_name = "Chained-Search-Argument";
break;
case 6: /* addEntry */
dsp_dissector = dissect_dsp_ChainedAddEntryArgument;
dsp_op_name = "Chained-Add-Entry-Argument";
break;
case 7: /* removeEntry */
dsp_dissector = dissect_dsp_ChainedRemoveEntryArgument;
dsp_op_name = "Chained-Remove-Entry-Argument";
break;
case 8: /* modifyEntry */
dsp_dissector = dissect_dsp_ChainedModifyEntryArgument;
dsp_op_name = "ChainedModify-Entry-Argument";
break;
case 9: /* modifyDN */
dsp_dissector = dissect_dsp_ChainedModifyDNArgument;
dsp_op_name = "ChainedModify-DN-Argument";
break;
default:
proto_tree_add_text(tree, tvb, offset, -1,"Unsupported DSP 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 1: /* read */
dsp_dissector = dissect_dsp_ChainedReadResult;
dsp_op_name = "Chained-Read-Result";
break;
case 2: /* compare */
dsp_dissector = dissect_dsp_ChainedCompareResult;
dsp_op_name = "Chained-Compare-Result";
break;
case 3: /* abandon */
dsp_dissector = dissect_dsp_ChainedAbandonResult;
dsp_op_name = "Chained-Abandon-Result";
break;
case 4: /* list */
dsp_dissector = dissect_dsp_ChainedListResult;
dsp_op_name = "Chained-List-Result";
break;
case 5: /* search */
dsp_dissector = dissect_dsp_ChainedSearchResult;
dsp_op_name = "Chained-Search-Result";
break;
case 6: /* addEntry */
dsp_dissector = dissect_dsp_ChainedAddEntryResult;
dsp_op_name = "Chained-Add-Entry-Result";
break;
case 7: /* removeEntry */
dsp_dissector = dissect_dsp_ChainedRemoveEntryResult;
dsp_op_name = "Chained-Remove-Entry-Result";
break;
case 8: /* modifyEntry */
dsp_dissector = dissect_dsp_ChainedModifyEntryResult;
dsp_op_name = "Chained-Modify-Entry-Result";
break;
case 9: /* modifyDN */
dsp_dissector = dissect_dsp_ChainedModifyDNResult;
dsp_op_name = "ChainedModify-DN-Result";
break;
default:
proto_tree_add_text(tree, tvb, offset, -1,"Unsupported DSP opcode");
break;
}
break;
case (ROS_OP_INVOKE | ROS_OP_ERROR): /* Return Error */
switch(session->ros_op & ROS_OP_OPCODE_MASK) {
case 1: /* attributeError */
dsp_dissector = dissect_dap_AttributeError;
dsp_op_name = "Attribute-Error";
break;
case 2: /* nameError */
dsp_dissector = dissect_dap_NameError;
dsp_op_name = "Name-Error";
break;
case 3: /* serviceError */
dsp_dissector = dissect_dap_ServiceError;
dsp_op_name = "Service-Error";
break;
case 4: /* referral */
dsp_dissector = dissect_dap_Referral;
dsp_op_name = "Referral";
break;
case 5: /* abandoned */
dsp_dissector = dissect_dap_Abandoned;
dsp_op_name = "Abandoned";
break;
case 6: /* securityError */
dsp_dissector = dissect_dap_SecurityError;
dsp_op_name = "Security-Error";
break;
case 7: /* abandonFailed */
dsp_dissector = dissect_dap_AbandonFailedError;
dsp_op_name = "Abandon-Failed-Error";
break;
case 8: /* updateError */
dsp_dissector = dissect_dap_UpdateError;
dsp_op_name = "Update-Error";
break;
case 9: /* DSAReferral */
dsp_dissector = dissect_dsp_DSAReferral;
dsp_op_name = "DSA-Referral";
break;
default:
proto_tree_add_text(tree, tvb, offset, -1,"Unsupported DSP errcode");
break;
}
break;
default:
proto_tree_add_text(tree, tvb, offset, -1,"Unsupported DSP PDU");
return;
}
if(dsp_dissector) {
if (check_col(pinfo->cinfo, COL_INFO))
col_set_str(pinfo->cinfo, COL_INFO, dsp_op_name);
while (tvb_reported_length_remaining(tvb, offset) > 0){
old_offset=offset;
offset=(*dsp_dissector)(FALSE, tvb, offset, &asn1_ctx, tree, -1);
if(offset == old_offset){
proto_tree_add_text(tree, tvb, offset, -1,"Internal error, zero-byte DSP PDU");
offset = tvb_length(tvb);
break;
}
}
}
}
/*--- proto_register_dsp -------------------------------------------*/
void proto_register_dsp(void) {
/* List of fields */
static hf_register_info hf[] =
{
#include "packet-dsp-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_dsp,
#include "packet-dsp-ettarr.c"
};
module_t *dsp_module;
/* Register protocol */
proto_dsp = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* initially disable the protocol */
proto_set_decoding(proto_dsp, FALSE);
register_dissector("dsp", dissect_dsp, proto_dsp);
/* Register fields and subtrees */
proto_register_field_array(proto_dsp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register our configuration options for DSP, particularly our port */
#ifdef PREFERENCE_GROUPING
dsp_module = prefs_register_protocol_subtree("OSI/X.500", proto_dsp, prefs_register_dsp);
#else
dsp_module = prefs_register_protocol(proto_dsp, prefs_register_dsp);
#endif
prefs_register_uint_preference(dsp_module, "tcp.port", "DSP TCP Port",
"Set the port for DSP operations (if other"
" than the default of 102)",
10, &global_dsp_tcp_port);
}
/*--- proto_reg_handoff_dsp --- */
void proto_reg_handoff_dsp(void) {
dissector_handle_t handle = NULL;
#include "packet-dsp-dis-tab.c"
/* APPLICATION CONTEXT */
oid_add_from_string("id-ac-directory-system","2.5.3.2");
/* ABSTRACT SYNTAXES */
/* Register DSP with ROS (with no use of RTSE) */
if((handle = find_dissector("dsp"))) {
register_ros_oid_dissector_handle("2.5.9.2", handle, 0, "id-as-directory-system", FALSE);
}
}
void prefs_register_dsp(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_dsp_tcp_port;
if((tcp_port > 0) && (tcp_port != 102) && tpkt_handle)
dissector_add("tcp.port", global_dsp_tcp_port, tpkt_handle);
}
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