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/* packet-rtse_asn1.c
* Routines for RTSE packet dissection
* Graeme Lunt 2005
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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/conversation.h>
#include <stdio.h>
#include <string.h>
#include "packet-ber.h"
#include "packet-pres.h"
#include "packet-acse.h"
#include "packet-ros.h"
#include "packet-rtse.h"
#define PNAME "X.228 OSI Reliable Transfer Service"
#define PSNAME "RTSE"
#define PFNAME "rtse"
/* Initialize the protocol and registered fields */
int proto_rtse = -1;
static struct SESSION_DATA_STRUCTURE* session = NULL;
static char object_identifier_id[MAX_OID_STR_LEN];
static gboolean open_request=FALSE;
/* indirect_reference, used to pick up the signalling so we know what
kind of data is transferred in SES_DATA_TRANSFER_PDUs */
static guint32 indir_ref=0;
static guint32 app_proto=0;
static proto_tree *top_tree=NULL;
static dissector_handle_t rtse_handle = NULL;
static dissector_handle_t ros_handle = NULL;
#include "packet-rtse-hf.c"
/* Initialize the subtree pointers */
static gint ett_rtse = -1;
#include "packet-rtse-ett.c"
static dissector_table_t rtse_oid_dissector_table=NULL;
static GHashTable *oid_table=NULL;
static gint ett_rtse_unknown = -1;
void
register_rtse_oid_dissector_handle(const char *oid, dissector_handle_t dissector, int proto _U_, const char *name, gboolean uses_ros)
{
/* save the name - but not used */
g_hash_table_insert(oid_table, (gpointer)oid, (gpointer)name);
/* register RTSE with the BER (ACSE) */
register_ber_oid_dissector_handle(oid, rtse_handle, proto, name);
if(uses_ros) {
/* make sure we call ROS ... */
dissector_add_string("rtse.oid", oid, ros_handle);
/* and then tell ROS how to dissect the AS*/
register_ros_oid_dissector_handle(oid, dissector, proto, name, TRUE);
} else {
/* otherwise we just remember how to dissect the AS */
dissector_add_string("rtse.oid", oid, dissector);
}
}
static int
call_rtse_oid_callback(const char *oid, tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
tvbuff_t *next_tvb;
next_tvb = tvb_new_subset(tvb, offset, tvb_length_remaining(tvb, offset), tvb_reported_length_remaining(tvb, offset));
if(!dissector_try_string(rtse_oid_dissector_table, oid, next_tvb, pinfo, tree)){
proto_item *item=NULL;
proto_tree *next_tree=NULL;
item=proto_tree_add_text(tree, next_tvb, 0, tvb_length_remaining(tvb, offset), "RTSE: Dissector for OID:%s not implemented. Contact Ethereal developers if you want this supported", oid);
if(item){
next_tree=proto_item_add_subtree(item, ett_rtse_unknown);
}
dissect_unknown_ber(pinfo, next_tvb, offset, next_tree);
}
/*XXX until we change the #.REGISTER signature for _PDU()s
* into new_dissector_t we have to do this kludge with
* manually step past the content in the ANY type.
*/
offset+=tvb_length_remaining(tvb, offset);
return offset;
}
#include "packet-rtse-fn.c"
/*
* Dissect RTSE PDUs inside a PPDU.
*/
static void
dissect_rtse(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
{
int offset = 0;
int old_offset;
proto_item *item=NULL;
proto_tree *tree=NULL;
/* save parent_tree so subdissectors can create new top nodes */
top_tree=parent_tree;
/* do we have application context from the acse dissector? */
if( !pinfo->private_data ){
if(parent_tree){
proto_tree_add_text(parent_tree, tvb, offset, -1,
"Internal error:can't get application context from ACSE dissector.");
}
return ;
} else {
session = ( (struct SESSION_DATA_STRUCTURE*)(pinfo->private_data) );
}
if(parent_tree){
item = proto_tree_add_item(parent_tree, proto_rtse, tvb, 0, -1, FALSE);
tree = proto_item_add_subtree(item, ett_rtse);
}
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "RTSE");
if (check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
while (tvb_reported_length_remaining(tvb, offset) > 0){
old_offset=offset;
offset=dissect_rtse_RTSE_apdus(FALSE, tvb, offset, pinfo , tree, -1);
if(offset == old_offset){
proto_tree_add_text(tree, tvb, offset, -1,"Internal error, zero-byte RTSE PDU");
offset = tvb_length(tvb);
break;
}
}
top_tree = NULL;
}
/*--- proto_register_rtse -------------------------------------------*/
void proto_register_rtse(void) {
/* List of fields */
static hf_register_info hf[] =
{
#include "packet-rtse-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_rtse,
&ett_rtse_unknown,
#include "packet-rtse-ettarr.c"
};
/* Register protocol */
proto_rtse = proto_register_protocol(PNAME, PSNAME, PFNAME);
register_dissector("rtse", dissect_rtse, proto_rtse);
/* Register fields and subtrees */
proto_register_field_array(proto_rtse, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
rtse_oid_dissector_table = register_dissector_table("rtse.oid", "RTSE OID Dissectors", FT_STRING, BASE_NONE);
oid_table=g_hash_table_new(g_str_hash, g_str_equal);
rtse_handle = find_dissector("rtse");
ros_handle = find_dissector("ros");
}
/*--- proto_reg_handoff_rtse --- */
void proto_reg_handoff_rtse(void) {
}
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