a887d3a9f3
encapsulation/data-link type to 16 bits, and shuffle some fields to eliminate some unnecessary padding - the net result should be no change in the structure size for 32 bits and a few bytes removed for 64 bits. This allows more encapsulation types - we've just about run out of the ones that fit in a signed 8-bit integer - and thus should fix bug 5025. svn path=/trunk/; revision=33613
302 lines
8.6 KiB
C
302 lines
8.6 KiB
C
/* frame_data.c
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* Routines for packet disassembly
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*
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* $Id$
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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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*
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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 <wiretap/wtap.h>
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#include <epan/frame_data.h>
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#include <epan/packet.h>
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#include <epan/emem.h>
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#include <epan/timestamp.h>
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#include "cfile.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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/* 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 = se_alloc(sizeof(frame_proto_data));
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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_remove_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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#define COMPARE_FRAME_NUM() ((fdata1->num < fdata2->num) ? -1 : \
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(fdata1->num > fdata2->num) ? 1 : \
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0)
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#define COMPARE_NUM(f) ((fdata1->f < fdata2->f) ? -1 : \
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(fdata1->f > fdata2->f) ? 1 : \
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COMPARE_FRAME_NUM())
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/* Compare time stamps.
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A packet whose time is a reference time is considered to have
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a lower time stamp than any frame with a non-reference time;
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if both packets' times are reference times, we compare the
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times of the packets. */
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#define COMPARE_TS(ts) \
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((fdata1->flags.ref_time && !fdata2->flags.ref_time) ? -1 : \
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(!fdata1->flags.ref_time && fdata2->flags.ref_time) ? 1 : \
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(fdata1->ts.secs < fdata2->ts.secs) ? -1 : \
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(fdata1->ts.secs > fdata2->ts.secs) ? 1 : \
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(fdata1->ts.nsecs < fdata2->ts.nsecs) ? -1 :\
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(fdata1->ts.nsecs > fdata2->ts.nsecs) ? 1 : \
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COMPARE_FRAME_NUM())
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gint
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frame_data_compare(const frame_data *fdata1, const frame_data *fdata2, int field)
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{
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switch (field) {
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case COL_NUMBER:
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return COMPARE_FRAME_NUM();
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case COL_CLS_TIME:
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switch (timestamp_get_type()) {
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case TS_ABSOLUTE:
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case TS_ABSOLUTE_WITH_DATE:
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case TS_EPOCH:
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return COMPARE_TS(abs_ts);
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case TS_RELATIVE:
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return COMPARE_TS(rel_ts);
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case TS_DELTA:
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return COMPARE_TS(del_cap_ts);
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case TS_DELTA_DIS:
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return COMPARE_TS(del_dis_ts);
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case TS_NOT_SET:
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return 0;
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}
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return 0;
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case COL_ABS_TIME:
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case COL_ABS_DATE_TIME:
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return COMPARE_TS(abs_ts);
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case COL_REL_TIME:
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return COMPARE_TS(rel_ts);
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case COL_DELTA_TIME:
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return COMPARE_TS(del_cap_ts);
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case COL_DELTA_TIME_DIS:
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return COMPARE_TS(del_dis_ts);
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case COL_PACKET_LENGTH:
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return COMPARE_NUM(pkt_len);
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case COL_CUMULATIVE_BYTES:
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return COMPARE_NUM(cum_bytes);
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}
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g_return_val_if_reached(0);
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}
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void
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frame_data_init(frame_data *fdata, guint32 num,
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const struct wtap_pkthdr *phdr, gint64 offset,
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guint32 cum_bytes)
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{
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fdata->next = NULL;
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fdata->prev = NULL;
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fdata->pfd = NULL;
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fdata->num = num;
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fdata->pkt_len = phdr->len;
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fdata->cum_bytes = cum_bytes + phdr->len;
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fdata->cap_len = phdr->caplen;
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fdata->file_off = offset;
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/* To save some memory, we coerce it into a gint16 */
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g_assert(phdr->pkt_encap <= G_MAXINT16);
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fdata->lnk_t = (gint16) phdr->pkt_encap;
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fdata->abs_ts.secs = phdr->ts.secs;
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fdata->abs_ts.nsecs = phdr->ts.nsecs;
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fdata->flags.passed_dfilter = 0;
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fdata->flags.encoding = PACKET_CHAR_ENC_CHAR_ASCII;
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fdata->flags.visited = 0;
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fdata->flags.marked = 0;
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fdata->flags.ref_time = 0;
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fdata->flags.ignored = 0;
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fdata->color_filter = NULL;
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#ifdef NEW_PACKET_LIST
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fdata->col_text_len = NULL;
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fdata->col_text = NULL;
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#endif
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}
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void
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frame_data_set_before_dissect(frame_data *fdata,
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nstime_t *elapsed_time,
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nstime_t *first_ts,
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nstime_t *prev_dis_ts,
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nstime_t *prev_cap_ts)
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{
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/* If we don't have the time stamp of the first packet in the
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capture, it's because this is the first packet. Save the time
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stamp of this packet as the time stamp of the first packet. */
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if (nstime_is_unset(first_ts))
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*first_ts = fdata->abs_ts;
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/* if this frames is marked as a reference time frame, reset
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firstsec and firstusec to this frame */
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if(fdata->flags.ref_time)
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*first_ts = fdata->abs_ts;
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/* If we don't have the time stamp of the previous captured packet,
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it's because this is the first packet. Save the time
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stamp of this packet as the time stamp of the previous captured
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packet. */
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if (nstime_is_unset(prev_cap_ts))
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*prev_cap_ts = fdata->abs_ts;
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/* Get the time elapsed between the first packet and this packet. */
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nstime_delta(&fdata->rel_ts, &fdata->abs_ts, first_ts);
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/* If it's greater than the current elapsed time, set the elapsed time
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to it (we check for "greater than" so as not to be confused by
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time moving backwards). */
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if ((gint32)elapsed_time->secs < fdata->rel_ts.secs
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|| ((gint32)elapsed_time->secs == fdata->rel_ts.secs && (gint32)elapsed_time->nsecs < fdata->rel_ts.nsecs)) {
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*elapsed_time = fdata->rel_ts;
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}
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/* Get the time elapsed between the previous displayed packet and
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this packet. */
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if (nstime_is_unset(prev_dis_ts))
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/* If we don't have the time stamp of the previous displayed packet,
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it's because we have no displayed packets prior to this.
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Set the delta time to zero. */
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nstime_set_zero(&fdata->del_dis_ts);
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else
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nstime_delta(&fdata->del_dis_ts, &fdata->abs_ts, prev_dis_ts);
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/* Get the time elapsed between the previous captured packet and
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this packet. */
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nstime_delta(&fdata->del_cap_ts, &fdata->abs_ts, prev_cap_ts);
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*prev_cap_ts = fdata->abs_ts;
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}
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void
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frame_data_set_after_dissect(frame_data *fdata,
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guint32 *cum_bytes,
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nstime_t *prev_dis_ts)
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{
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/* This frame either passed the display filter list or is marked as
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a time reference frame. All time reference frames are displayed
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even if they dont pass the display filter */
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if(fdata->flags.ref_time){
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/* if this was a TIME REF frame we should reset the cul bytes field */
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*cum_bytes = fdata->pkt_len;
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fdata->cum_bytes = *cum_bytes;
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} else {
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/* increase cum_bytes with this packets length */
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*cum_bytes += fdata->pkt_len;
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fdata->cum_bytes = *cum_bytes;
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}
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/* Set the time of the previous displayed frame to the time of this
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frame. */
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*prev_dis_ts = fdata->abs_ts;
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}
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void
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frame_data_cleanup(frame_data *fdata)
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{
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if (fdata->pfd)
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g_slist_free(fdata->pfd);
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fdata->pfd = NULL;
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}
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