forked from osmocom/wireshark
148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
/* frame_data.c
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* Routines for packet disassembly
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*
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* $Id: frame_data.c,v 1.5 2003/07/08 05:29:42 tpot Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "frame_data.h"
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#include "packet.h"
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#include <glib.h>
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/* Protocol-specific data attached to a frame_data structure - protocol
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index and opaque pointer. */
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typedef struct _frame_proto_data {
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int proto;
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void *proto_data;
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} frame_proto_data;
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static GMemChunk *frame_proto_data_area = NULL;
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/*
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* Free up any space allocated for frame proto data areas and then
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* allocate a new area.
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*
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* We can free the area, as the structures it contains are pointed to by
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* frames, that will be freed as well.
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*/
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static void
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packet_init_protocol(void)
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{
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if (frame_proto_data_area)
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g_mem_chunk_destroy(frame_proto_data_area);
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frame_proto_data_area = g_mem_chunk_new("frame_proto_data_area",
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sizeof(frame_proto_data),
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20 * sizeof(frame_proto_data), /* FIXME*/
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G_ALLOC_ONLY);
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}
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void
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frame_data_init(void)
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{
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register_init_routine(&packet_init_protocol);
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}
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void
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frame_data_cleanup(void)
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{
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/* this function intentionally left blank :) */
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}
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/* XXX - I declared this static, because it only seems to be used by
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* p_get_proto_data and p_add_proto_data
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*/
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static gint p_compare(gconstpointer a, gconstpointer b)
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{
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const frame_proto_data *ap = (const frame_proto_data *)a;
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const frame_proto_data *bp = (const frame_proto_data *)b;
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if (ap -> proto > bp -> proto)
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return 1;
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else if (ap -> proto == bp -> proto)
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return 0;
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else
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return -1;
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}
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void
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p_add_proto_data(frame_data *fd, int proto, void *proto_data)
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{
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frame_proto_data *p1 = g_mem_chunk_alloc(frame_proto_data_area);
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g_assert(p1 != NULL);
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p1 -> proto = proto;
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p1 -> proto_data = proto_data;
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/* Add it to the GSLIST */
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fd -> pfd = g_slist_insert_sorted(fd -> pfd,
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(gpointer *)p1,
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p_compare);
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}
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void *
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p_get_proto_data(frame_data *fd, int proto)
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{
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frame_proto_data temp, *p1;
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GSList *item;
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temp.proto = proto;
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temp.proto_data = NULL;
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item = g_slist_find_custom(fd->pfd, (gpointer *)&temp, p_compare);
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if (item) {
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p1 = (frame_proto_data *)item->data;
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return p1->proto_data;
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}
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return NULL;
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}
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void
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p_rem_proto_data(frame_data *fd, int proto)
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{
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frame_proto_data temp;
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GSList *item;
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temp.proto = proto;
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temp.proto_data = NULL;
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item = g_slist_find_custom(fd->pfd, (gpointer *)&temp, p_compare);
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if (item) {
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fd->pfd = g_slist_remove(fd->pfd, item->data);
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}
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}
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