forked from osmocom/wireshark
127 lines
2.8 KiB
C
127 lines
2.8 KiB
C
/* tvbuff_real.c
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*
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* Copyright (c) 2000 by Gilbert Ramirez <gram@alumni.rice.edu>
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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 "tvbuff.h"
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#include "tvbuff-int.h"
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#include "proto.h" /* XXX - only used for DISSECTOR_ASSERT, probably a new header file? */
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#include "exceptions.h"
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struct tvb_real {
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struct tvbuff tvb;
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/** Func to call when actually freed */
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tvbuff_free_cb_t free_cb;
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};
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static void
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real_free(tvbuff_t *tvb)
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{
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struct tvb_real *real_tvb = (struct tvb_real *) tvb;
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if (real_tvb->free_cb) {
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/*
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* XXX - do this with a union?
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*/
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real_tvb->free_cb((gpointer)tvb->real_data);
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}
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}
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static guint
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real_offset(const tvbuff_t *tvb _U_, const guint counter)
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{
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return counter;
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}
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static const struct tvb_ops tvb_real_ops = {
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sizeof(struct tvb_real), /* size */
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real_free, /* free */
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real_offset, /* offset */
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NULL, /* get_ptr */
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NULL, /* memcpy */
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NULL, /* find_guint8 */
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NULL, /* pbrk_guint8 */
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NULL, /* clone */
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};
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tvbuff_t *
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tvb_new_real_data(const guint8* data, const guint length, const gint reported_length)
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{
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tvbuff_t *tvb;
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struct tvb_real *real_tvb;
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THROW_ON(reported_length < -1, ReportedBoundsError);
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tvb = tvb_new(&tvb_real_ops);
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tvb->real_data = data;
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tvb->length = length;
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tvb->reported_length = reported_length;
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tvb->contained_length = reported_length;
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tvb->initialized = TRUE;
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/*
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* This is the top-level real tvbuff for this data source,
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* so its data source tvbuff is itself.
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*/
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tvb->ds_tvb = tvb;
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real_tvb = (struct tvb_real *) tvb;
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real_tvb->free_cb = NULL;
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return tvb;
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}
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void
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tvb_set_free_cb(tvbuff_t *tvb, const tvbuff_free_cb_t func)
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{
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struct tvb_real *real_tvb = (struct tvb_real *) tvb;
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DISSECTOR_ASSERT(tvb);
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DISSECTOR_ASSERT(tvb->ops == &tvb_real_ops);
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real_tvb->free_cb = func;
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}
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void
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tvb_set_child_real_data_tvbuff(tvbuff_t *parent, tvbuff_t *child)
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{
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DISSECTOR_ASSERT(parent && child);
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DISSECTOR_ASSERT(parent->initialized);
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DISSECTOR_ASSERT(child->initialized);
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DISSECTOR_ASSERT(child->ops == &tvb_real_ops);
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tvb_add_to_chain(parent, child);
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}
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tvbuff_t *
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tvb_new_child_real_data(tvbuff_t *parent, const guint8* data, const guint length, const gint reported_length)
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{
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tvbuff_t *tvb = tvb_new_real_data(data, length, reported_length);
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tvb_set_child_real_data_tvbuff(parent, tvb);
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return tvb;
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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