126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/* packet-h323.c
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* Routines for H.323 packet dissection
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* 2007 Tomas Kukosa
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/oids.h>
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#include <epan/asn1.h>
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#include "packet-per.h"
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#include "packet-h225.h"
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#include "packet-h323.h"
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#define PNAME "H.323"
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#define PSNAME "H.323"
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#define PFNAME "h323"
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void proto_register_h323(void);
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void proto_reg_handoff_h323(void);
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/* Generic Extensible Framework */
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gef_ctx_t* gef_ctx_alloc(wmem_allocator_t *pool, gef_ctx_t *parent, const gchar *type) {
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gef_ctx_t *gefx;
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gefx = wmem_new0(pool, gef_ctx_t);
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gefx->signature = GEF_CTX_SIGNATURE;
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gefx->parent = parent;
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gefx->type = type;
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return gefx;
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}
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gboolean gef_ctx_check_signature(gef_ctx_t *gefx) {
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return gefx && (gefx->signature == GEF_CTX_SIGNATURE);
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}
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gef_ctx_t* gef_ctx_get(void *ptr) {
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gef_ctx_t *gefx = (gef_ctx_t*)ptr;
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asn1_ctx_t *actx = (asn1_ctx_t*)ptr;
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if (!asn1_ctx_check_signature(actx))
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actx = NULL;
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if (actx)
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gefx = (gef_ctx_t *)actx->private_data;
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if (!gef_ctx_check_signature(gefx))
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gefx = NULL;
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return gefx;
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}
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void gef_ctx_update_key(wmem_allocator_t *pool, gef_ctx_t *gefx) {
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const gchar *parent_key;
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if (!gefx) return;
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parent_key = (gefx->parent) ? gefx->parent->key : NULL;
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gefx->key = wmem_strdup_printf(pool,
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"%s%s" /* parent prefix */
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"%s%s%s" /* type, id */
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"%s%s" /* subid */,
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(parent_key) ? parent_key : "", (parent_key) ? "/" : "",
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(gefx->type) ? gefx->type : "", (gefx->type && (gefx->id || gefx->subid)) ? "/" : "", (gefx->id) ? gefx->id : "",
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(gefx->subid) ? "-" : "", (gefx->subid) ? gefx->subid : ""
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);
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}
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/* Initialize the protocol and registered fields */
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static int proto_h323 = -1;
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#include "packet-h323-hf.c"
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/* Initialize the subtree pointers */
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#include "packet-h323-ett.c"
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#include "packet-h323-fn.c"
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/*--- proto_register_h323 ----------------------------------------------*/
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void proto_register_h323(void) {
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/* List of fields */
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static hf_register_info hf[] = {
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#include "packet-h323-hfarr.c"
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};
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/* List of subtrees */
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static gint *ett[] = {
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#include "packet-h323-ettarr.c"
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};
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/* Register protocol */
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proto_h323 = proto_register_protocol(PNAME, PSNAME, PFNAME);
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/* Register fields and subtrees */
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proto_register_field_array(proto_h323, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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/*--- proto_reg_handoff_h323 -------------------------------------------*/
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void proto_reg_handoff_h323(void)
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{
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dissector_handle_t q931_handle;
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q931_handle = find_dissector("q931");
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/* H.323, Annex M1, Tunnelling of signalling protocols (QSIG) in H.323 */
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dissector_add_string("h225.tp", "1.3.12.9", q931_handle);
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/* H.323, Annex M4, Tunnelling of narrow-band signalling syntax (NSS) for H.323 */
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dissector_add_string("h225.gef.content", "GenericData/1000/1",
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create_dissector_handle(dissect_RasTunnelledSignallingMessage_PDU, proto_h323));
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/* H.323, Annex R, Robustness methods for H.323 entities */
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dissector_add_string("h225.gef.content", "GenericData/1/1",
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create_dissector_handle(dissect_RobustnessData_PDU, proto_h323));
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}
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