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/* packet-h323.c
* Routines for H.323 packet dissection
* 2007 Tomas Kukosa
*
* 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/oids.h>
#include <epan/asn1.h>
#include "packet-per.h"
#include "packet-h225.h"
#include "packet-h323.h"
#define PNAME "H.323"
#define PSNAME "H.323"
#define PFNAME "h323"
void proto_register_h323(void);
void proto_reg_handoff_h323(void);
/* Generic Extensible Framework */
gef_ctx_t* gef_ctx_alloc(gef_ctx_t *parent, const gchar *type) {
gef_ctx_t *gefx;
gefx = wmem_new0(wmem_packet_scope(), gef_ctx_t);
gefx->signature = GEF_CTX_SIGNATURE;
gefx->parent = parent;
gefx->type = type;
return gefx;
}
gboolean gef_ctx_check_signature(gef_ctx_t *gefx) {
return gefx && (gefx->signature == GEF_CTX_SIGNATURE);
}
gef_ctx_t* gef_ctx_get(void *ptr) {
gef_ctx_t *gefx = (gef_ctx_t*)ptr;
asn1_ctx_t *actx = (asn1_ctx_t*)ptr;
if (!asn1_ctx_check_signature(actx))
actx = NULL;
if (actx)
gefx = (gef_ctx_t *)actx->private_data;
if (!gef_ctx_check_signature(gefx))
gefx = NULL;
return gefx;
}
void gef_ctx_update_key(gef_ctx_t *gefx) {
const gchar *parent_key;
if (!gefx) return;
parent_key = (gefx->parent) ? gefx->parent->key : NULL;
gefx->key = wmem_strdup_printf(wmem_packet_scope(),
"%s%s" /* parent prefix */
"%s%s%s" /* type, id */
"%s%s" /* subid */,
(parent_key) ? parent_key : "", (parent_key) ? "/" : "",
(gefx->type) ? gefx->type : "", (gefx->type && (gefx->id || gefx->subid)) ? "/" : "", (gefx->id) ? gefx->id : "",
(gefx->subid) ? "-" : "", (gefx->subid) ? gefx->subid : ""
);
}
/* Initialize the protocol and registered fields */
static int proto_h323 = -1;
#include "packet-h323-hf.c"
/* Initialize the subtree pointers */
#include "packet-h323-ett.c"
#include "packet-h323-fn.c"
/*--- proto_register_h323 ----------------------------------------------*/
void proto_register_h323(void) {
/* List of fields */
static hf_register_info hf[] = {
#include "packet-h323-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
#include "packet-h323-ettarr.c"
};
/* Register protocol */
proto_h323 = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_h323, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
/*--- proto_reg_handoff_h323 -------------------------------------------*/
void proto_reg_handoff_h323(void)
{
dissector_handle_t q931_handle;
q931_handle = find_dissector("q931");
/* H.323, Annex M1, Tunnelling of signalling protocols (QSIG) in H.323 */
dissector_add_string("h225.tp", "1.3.12.9", q931_handle);
/* H.323, Annex M4, Tunnelling of narrow-band signalling syntax (NSS) for H.323 */
dissector_add_string("h225.gef.content", "GenericData/1000/1",
create_dissector_handle(dissect_RasTunnelledSignallingMessage_PDU, proto_h323));
/* H.323, Annex R, Robustness methods for H.323 entities */
dissector_add_string("h225.gef.content", "GenericData/1/1",
create_dissector_handle(dissect_RobustnessData_PDU, proto_h323));
}
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