Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 126 insertions, 0 deletions

diff --git a/epan/tvbuff_real.c b/epan/tvbuff_real.c
new file mode 100644
index 00000000..62ec17cc
--- /dev/null
+++ b/epan/tvbuff_real.c
@@ -0,0 +1,126 @@
+/* tvbuff_real.c
+ *
+ * Copyright (c) 2000 by Gilbert Ramirez <gram@alumni.rice.edu>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include "tvbuff.h"
+#include "tvbuff-int.h"
+#include "proto.h"	/* XXX - only used for DISSECTOR_ASSERT, probably a new header file? */
+#include "exceptions.h"
+
+struct tvb_real {
+	struct tvbuff tvb;
+
+	/** Func to call when actually freed */
+	tvbuff_free_cb_t	free_cb;
+};
+
+static void
+real_free(tvbuff_t *tvb)
+{
+	struct tvb_real *real_tvb = (struct tvb_real *) tvb;
+
+	if (real_tvb->free_cb) {
+		/*
+		 * XXX - do this with a union?
+		 */
+		real_tvb->free_cb((gpointer)tvb->real_data);
+	}
+}
+
+static guint
+real_offset(const tvbuff_t *tvb _U_, const guint counter)
+{
+	return counter;
+}
+
+static const struct tvb_ops tvb_real_ops = {
+	sizeof(struct tvb_real), /* size */
+
+	real_free,            /* free */
+	real_offset,          /* offset */
+	NULL,                 /* get_ptr */
+	NULL,                 /* memcpy */
+	NULL,                 /* find_guint8 */
+	NULL,                 /* pbrk_guint8 */
+	NULL,                 /* clone */
+};
+
+tvbuff_t *
+tvb_new_real_data(const guint8* data, const guint length, const gint reported_length)
+{
+	tvbuff_t *tvb;
+	struct tvb_real *real_tvb;
+
+	THROW_ON(reported_length < -1, ReportedBoundsError);
+
+	tvb = tvb_new(&tvb_real_ops);
+
+	tvb->real_data           = data;
+	tvb->length              = length;
+	tvb->reported_length     = reported_length;
+	tvb->contained_length    = reported_length;
+	tvb->initialized         = TRUE;
+
+	/*
+	 * This is the top-level real tvbuff for this data source,
+	 * so its data source tvbuff is itself.
+	 */
+	tvb->ds_tvb = tvb;
+
+	real_tvb = (struct tvb_real *) tvb;
+	real_tvb->free_cb = NULL;
+
+	return tvb;
+}
+
+void
+tvb_set_free_cb(tvbuff_t *tvb, const tvbuff_free_cb_t func)
+{
+	struct tvb_real *real_tvb = (struct tvb_real *) tvb;
+
+	DISSECTOR_ASSERT(tvb);
+	DISSECTOR_ASSERT(tvb->ops == &tvb_real_ops);
+	real_tvb->free_cb = func;
+}
+
+void
+tvb_set_child_real_data_tvbuff(tvbuff_t *parent, tvbuff_t *child)
+{
+	DISSECTOR_ASSERT(parent && child);
+	DISSECTOR_ASSERT(parent->initialized);
+	DISSECTOR_ASSERT(child->initialized);
+	DISSECTOR_ASSERT(child->ops == &tvb_real_ops);
+	tvb_add_to_chain(parent, child);
+}
+
+tvbuff_t *
+tvb_new_child_real_data(tvbuff_t *parent, const guint8* data, const guint length, const gint reported_length)
+{
+	tvbuff_t *tvb = tvb_new_real_data(data, length, reported_length);
+
+	tvb_set_child_real_data_tvbuff(parent, tvb);
+
+	return tvb;
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 noexpandtab:
+ * :indentSize=8:tabSize=8:noTabs=false:
+ */