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/* frame_data.c
* Routines for packet disassembly
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.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
#include "frame_data.h"
#include "packet.h"
#include "emem.h"
#include "timestamp.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;
/* 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)
{
const frame_proto_data *ap = (const frame_proto_data *)a;
const frame_proto_data *bp = (const frame_proto_data *)b;
if (ap -> proto > bp -> proto)
return 1;
else if (ap -> proto == bp -> proto)
return 0;
else
return -1;
}
void
p_add_proto_data(frame_data *fd, int proto, void *proto_data)
{
frame_proto_data *p1 = se_alloc(sizeof(frame_proto_data));
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_remove_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->data);
}
}
#define COMPARE_FRAME_NUM() ((fdata1->num < fdata2->num) ? -1 : \
(fdata1->num > fdata2->num) ? 1 : \
0)
#define COMPARE_NUM(f) ((fdata1->f < fdata2->f) ? -1 : \
(fdata1->f > fdata2->f) ? 1 : \
COMPARE_FRAME_NUM())
/* Compare time stamps.
A packet whose time is a reference time is considered to have
a lower time stamp than any frame with a non-reference time;
if both packets' times are reference times, we compare the
times of the packets. */
#define COMPARE_TS(ts) \
((fdata1->flags.ref_time && !fdata2->flags.ref_time) ? -1 : \
(!fdata1->flags.ref_time && fdata2->flags.ref_time) ? 1 : \
(fdata1->ts.secs < fdata2->ts.secs) ? -1 : \
(fdata1->ts.secs > fdata2->ts.secs) ? 1 : \
(fdata1->ts.nsecs < fdata2->ts.nsecs) ? -1 :\
(fdata1->ts.nsecs > fdata2->ts.nsecs) ? 1 : \
COMPARE_FRAME_NUM())
gint
frame_data_compare(const frame_data *fdata1, const frame_data *fdata2, int field)
{
switch (field) {
case COL_NUMBER:
return COMPARE_FRAME_NUM();
case COL_CLS_TIME:
switch (timestamp_get_type()) {
case TS_ABSOLUTE:
case TS_ABSOLUTE_WITH_DATE:
case TS_EPOCH:
return COMPARE_TS(abs_ts);
case TS_RELATIVE:
return COMPARE_TS(rel_ts);
case TS_DELTA:
return COMPARE_TS(del_cap_ts);
case TS_DELTA_DIS:
return COMPARE_TS(del_dis_ts);
case TS_NOT_SET:
return 0;
}
return 0;
case COL_ABS_TIME:
case COL_ABS_DATE_TIME:
return COMPARE_TS(abs_ts);
case COL_REL_TIME:
return COMPARE_TS(rel_ts);
case COL_DELTA_TIME:
return COMPARE_TS(del_cap_ts);
case COL_DELTA_TIME_DIS:
return COMPARE_TS(del_dis_ts);
case COL_PACKET_LENGTH:
return COMPARE_NUM(pkt_len);
case COL_CUMULATIVE_BYTES:
return COMPARE_NUM(cum_bytes);
}
g_return_val_if_reached(0);
}
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