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/* ethertype.c
* Routines for calling the right protocol for the ethertype.
*
* $Id: packet-ethertype.c,v 1.4 2000/05/19 04:54:33 gram Exp $
*
* Gilbert Ramirez <gram@xiexie.org>
*
* 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 <glib.h>
#include "packet.h"
#include "packet-ip.h"
#include "packet-ipx.h"
#include "packet-vlan.h"
#include "packet-vines.h"
#include "etypes.h"
static dissector_table_t ethertype_dissector_table;
const value_string etype_vals[] = {
{ETHERTYPE_IP, "IP" },
{ETHERTYPE_IPv6, "IPv6" },
{ETHERTYPE_X25L3, "X.25 Layer 3" },
{ETHERTYPE_ARP, "ARP" },
{ETHERTYPE_REVARP, "RARP" },
{ETHERTYPE_ATALK, "Appletalk" },
{ETHERTYPE_AARP, "AARP" },
{ETHERTYPE_IPX, "Netware IPX/SPX"},
{ETHERTYPE_VINES, "Vines" },
{ETHERTYPE_TRAIN, "Netmon Train" },
{ETHERTYPE_LOOP, "Loopback" }, /* Ethernet Loopback */
{ETHERTYPE_PPPOED, "PPPoE Discovery"},
{ETHERTYPE_PPPOES, "PPPoE Session" },
{ETHERTYPE_VLAN, "802.1Q Virtual LAN" },
{ETHERTYPE_MPLS, "MPLS label switched packet" },
{ETHERTYPE_MPLS_MULTI, "MPLS multicast label switched packet" },
{0, NULL } };
void
capture_ethertype(guint16 etype, int offset,
const u_char *pd, packet_counts *ld)
{
switch (etype) {
case ETHERTYPE_IP:
capture_ip(pd, offset, ld);
break;
case ETHERTYPE_IPX:
capture_ipx(pd, offset, ld);
break;
case ETHERTYPE_VLAN:
capture_vlan(pd, offset, ld);
break;
case ETHERTYPE_VINES:
capture_vines(pd, offset, ld);
break;
default:
ld->other++;
break;
}
}
void
ethertype(guint16 etype, tvbuff_t *tvb, int offset_after_etype, packet_info *pinfo,
proto_tree *tree, proto_tree *fh_tree, int item_id)
{
dissector_t sub_dissector;
char *description;
tvbuff_t *next_tvb;
const guint8 *next_pd;
int next_offset;
/* Add to proto_tree */
if (tree) {
proto_tree_add_item(fh_tree, item_id, tvb, offset_after_etype - 2, 2, etype);
}
next_tvb = tvb_new_subset(tvb, offset_after_etype, -1, -1);
tvb_compat(next_tvb, &next_pd, &next_offset);
/* Look for sub-dissector */
sub_dissector = dissector_lookup( ethertype_dissector_table, etype );
if (sub_dissector) {
/* Call sub-dissector */
sub_dissector(next_pd, next_offset, pinfo->fd, tree);
}
else {
/* Label rest of packet as "Data" */
dissect_data_tvb(next_tvb, pinfo, tree);
/* Label protocol */
switch(etype) {
case ETHERTYPE_LOOP:
if (check_col(pinfo->fd, COL_PROTOCOL)) {
col_add_fstr(pinfo->fd, COL_PROTOCOL, "LOOP");
}
break;
default:
if (check_col(pinfo->fd, COL_PROTOCOL)) {
col_add_fstr(pinfo->fd, COL_PROTOCOL, "0x%04x", etype);
}
break;
}
if (check_col(pinfo->fd, COL_INFO)) {
description = match_strval(etype, etype_vals);
if (description) {
col_add_fstr(pinfo->fd, COL_INFO, "%s", description);
}
}
}
}
void
proto_register_ethertype(void)
{
/* subdissector code */
ethertype_dissector_table = register_dissector_table("ethertype");
}
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