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/* packet-frame.c
*
* Top-most dissector. Decides dissector based on Wiretap Encapsulation Type.
*
* $Id: packet-frame.c,v 1.2 2000/11/15 05:41:42 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
* Copyright 2000 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 <glib.h>
#include "packet.h"
#include "timestamp.h"
#include "tvbuff.h"
#include "packet-frame.h"
#include "packet-ascend.h"
#include "packet-atalk.h"
#include "packet-atm.h"
#include "packet-clip.h"
#include "packet-eth.h"
#include "packet-fddi.h"
#include "packet-ipv6.h"
#include "packet-lapb.h"
#include "packet-lapd.h"
#include "packet-llc.h"
#include "packet-null.h"
#include "packet-ppp.h"
#include "packet-raw.h"
#include "packet-sna.h"
#include "packet-tr.h"
#include "packet-v120.h"
#include "packet-vines.h"
#include "packet-ieee80211.h"
static int proto_frame = -1;
static int hf_frame_arrival_time = -1;
static int hf_frame_time_delta = -1;
static int hf_frame_number = -1;
static int hf_frame_packet_len = -1;
static int hf_frame_capture_len = -1;
static int hf_frame_p2p_dir = -1;
static int proto_short = -1;
int proto_malformed = -1;
static gint ett_frame = -1;
static const value_string p2p_dirs[] = {
{ P2P_DIR_SENT, "Sent" },
{ P2P_DIR_RECV, "Received" },
{ 0, NULL }
};
void
dissect_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *fh_tree;
proto_item *ti;
struct timeval tv;
int cap_len, pkt_len;
pinfo->current_proto = "Frame";
if (pinfo->fd->lnk_t == WTAP_ENCAP_LAPD ||
pinfo->fd->lnk_t == WTAP_ENCAP_PPP_WITH_PHDR) {
pinfo->p2p_dir = pinfo->pseudo_header->p2p.sent ? P2P_DIR_SENT : P2P_DIR_RECV;
}
/* Put in frame header information. */
if (tree) {
cap_len = tvb_length(tvb);
pkt_len = tvb_reported_length(tvb);
ti = proto_tree_add_protocol_format(tree, proto_frame, tvb, 0, tvb_length(tvb),
"Frame %u (%u on wire, %u captured)", pinfo->fd->num, pkt_len, cap_len);
fh_tree = proto_item_add_subtree(ti, ett_frame);
tv.tv_sec = pinfo->fd->abs_secs;
tv.tv_usec = pinfo->fd->abs_usecs;
proto_tree_add_time(fh_tree, hf_frame_arrival_time, tvb,
0, 0, &tv);
tv.tv_sec = pinfo->fd->del_secs;
tv.tv_usec = pinfo->fd->del_usecs;
proto_tree_add_time(fh_tree, hf_frame_time_delta, tvb,
0, 0, &tv);
proto_tree_add_uint(fh_tree, hf_frame_number, tvb,
0, 0, pinfo->fd->num);
proto_tree_add_uint_format(fh_tree, hf_frame_packet_len, tvb,
0, 0, pkt_len, "Packet Length: %d byte%s", pkt_len,
plurality(pkt_len, "", "s"));
proto_tree_add_uint_format(fh_tree, hf_frame_capture_len, tvb,
0, 0, cap_len, "Capture Length: %d byte%s", cap_len,
plurality(cap_len, "", "s"));
/* Check for existences of P2P pseudo header */
if (pinfo->p2p_dir != P2P_DIR_UNKNOWN) {
proto_tree_add_uint(fh_tree, hf_frame_p2p_dir, tvb,
0, 0, pinfo->p2p_dir);
}
}
TRY {
switch (pinfo->fd->lnk_t) {
case WTAP_ENCAP_ETHERNET :
dissect_eth(tvb, pinfo, tree);
break;
case WTAP_ENCAP_FDDI :
dissect_fddi(tvb, pinfo, tree, FALSE);
break;
case WTAP_ENCAP_FDDI_BITSWAPPED :
dissect_fddi(tvb, pinfo, tree, TRUE);
break;
case WTAP_ENCAP_TOKEN_RING :
dissect_tr(tvb, pinfo, tree);
break;
case WTAP_ENCAP_NULL :
dissect_null(tvb, pinfo, tree);
break;
case WTAP_ENCAP_PPP :
case WTAP_ENCAP_PPP_WITH_PHDR :
dissect_ppp(tvb, pinfo, tree);
break;
case WTAP_ENCAP_LAPB :
dissect_lapb(tvb, pinfo, tree);
break;
case WTAP_ENCAP_RAW_IP :
dissect_raw(tvb, pinfo, tree);
break;
case WTAP_ENCAP_LINUX_ATM_CLIP :
dissect_clip(tvb, pinfo, tree);
break;
case WTAP_ENCAP_ATM_SNIFFER :
dissect_atm(tvb, pinfo, tree);
break;
case WTAP_ENCAP_ASCEND :
dissect_ascend(tvb, pinfo, tree);
break;
case WTAP_ENCAP_LAPD :
dissect_lapd(tvb, pinfo, tree);
break;
case WTAP_ENCAP_V120 :
dissect_v120(tvb, pinfo, tree);
break;
case WTAP_ENCAP_ATM_RFC1483:
dissect_llc(tvb, pinfo, tree);
break;
case WTAP_ENCAP_IEEE_802_11 :
dissect_ieee80211(tvb,pinfo,tree);
break;
default:
g_assert_not_reached();
break;
}
}
CATCH(BoundsError) {
proto_tree_add_protocol_format(tree, proto_short, tvb, 0, 0,
"[Short Frame: %s]", pinfo->current_proto );
}
CATCH(ReportedBoundsError) {
proto_tree_add_protocol_format(tree, proto_malformed, tvb, 0, 0,
"[Malformed Frame: %s]", pinfo->current_proto );
}
ENDTRY;
}
void
proto_register_frame(void)
{
static hf_register_info hf[] = {
{ &hf_frame_arrival_time,
{ "Arrival Time", "frame.time", FT_ABSOLUTE_TIME, BASE_NONE, NULL, 0x0,
""}},
{ &hf_frame_time_delta,
{ "Time delta from previous packet", "frame.time_delta", FT_RELATIVE_TIME, BASE_NONE, NULL,
0x0,
"" }},
{ &hf_frame_number,
{ "Frame Number", "frame.number", FT_UINT32, BASE_DEC, NULL, 0x0,
"" }},
{ &hf_frame_packet_len,
{ "Total Frame Length", "frame.pkt_len", FT_UINT32, BASE_DEC, NULL, 0x0,
"" }},
{ &hf_frame_capture_len,
{ "Capture Frame Length", "frame.cap_len", FT_UINT32, BASE_DEC, NULL, 0x0,
"" }},
{ &hf_frame_p2p_dir,
{ "Point-to-Point Direction", "frame.p2p_dir", FT_UINT8, BASE_DEC, VALS(p2p_dirs), 0x0,
"" }},
};
static gint *ett[] = {
&ett_frame,
};
proto_frame = proto_register_protocol("Frame", "frame");
proto_register_field_array(proto_frame, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
proto_short = proto_register_protocol("Short Frame", "short");
proto_malformed = proto_register_protocol("Malformed Frame", "malformed");
}
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