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/* frame_data.c
* Routines for packet disassembly
*
* $Id: frame_data.c,v 1.1 2001/04/01 04:11:50 hagbard Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#include "frame_data.h"
#include "packet.h"
#include <glib.h>
/* Protocol-specific data attached to a frame_data structure - protocol
index and opaque pointer. */
typedef struct _frame_proto_data {
int proto;
void *proto_data;
} frame_proto_data;
static GMemChunk *frame_proto_data_area = NULL;
/*
* Free up any space allocated for frame proto data areas and then
* allocate a new area.
*
* We can free the area, as the structures it contains are pointed to by
* frames, that will be freed as well.
*/
static void
packet_init_protocol(void)
{
if (frame_proto_data_area)
g_mem_chunk_destroy(frame_proto_data_area);
frame_proto_data_area = g_mem_chunk_new("frame_proto_data_area",
sizeof(frame_proto_data),
20 * sizeof(frame_proto_data), /* FIXME*/
G_ALLOC_ONLY);
}
void
frame_data_init(void)
{
register_init_routine(&packet_init_protocol);
}
void
frame_data_cleanup(void)
{
/* this function intentionally left blank :) */
}
/* XXX - I declared this static, because it only seems to be used by
* p_get_proto_data and p_add_proto_data
*/
static gint p_compare(gconstpointer a, gconstpointer b)
{
if (((frame_proto_data *)a) -> proto > ((frame_proto_data *)b) -> proto)
return 1;
else if (((frame_proto_data *)a) -> proto == ((frame_proto_data *)b) -> proto)
return 0;
else
return -1;
}
void
p_add_proto_data(frame_data *fd, int proto, void *proto_data)
{
frame_proto_data *p1 = g_mem_chunk_alloc(frame_proto_data_area);
g_assert(p1 != NULL);
p1 -> proto = proto;
p1 -> proto_data = proto_data;
/* Add it to the GSLIST */
fd -> pfd = g_slist_insert_sorted(fd -> pfd,
(gpointer *)p1,
p_compare);
}
void *
p_get_proto_data(frame_data *fd, int proto)
{
frame_proto_data temp, *p1;
GSList *item;
temp.proto = proto;
temp.proto_data = NULL;
item = g_slist_find_custom(fd->pfd, (gpointer *)&temp, p_compare);
if (item) {
p1 = (frame_proto_data *)item->data;
return p1->proto_data;
}
return NULL;
}
void
p_rem_proto_data(frame_data *fd, int proto)
{
frame_proto_data temp;
GSList *item;
temp.proto = proto;
temp.proto_data = NULL;
item = g_slist_find_custom(fd->pfd, (gpointer *)&temp, p_compare);
if (item) {
fd->pfd = g_slist_remove(fd->pfd, item);
}
}
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