forked from osmocom/wireshark
146 lines
4.0 KiB
C
146 lines
4.0 KiB
C
/* ethertype.c
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* Routines for calling the right protocol for the ethertype.
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*
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* $Id: packet-ethertype.c,v 1.5 2000/05/31 05:07:03 guy Exp $
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*
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* Gilbert Ramirez <gram@xiexie.org>
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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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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <glib.h>
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#include "packet.h"
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#include "packet-ip.h"
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#include "packet-ipx.h"
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#include "packet-vlan.h"
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#include "packet-vines.h"
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#include "etypes.h"
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static dissector_table_t ethertype_dissector_table;
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const value_string etype_vals[] = {
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{ETHERTYPE_IP, "IP" },
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{ETHERTYPE_IPv6, "IPv6" },
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{ETHERTYPE_X25L3, "X.25 Layer 3" },
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{ETHERTYPE_ARP, "ARP" },
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{ETHERTYPE_REVARP, "RARP" },
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{ETHERTYPE_ATALK, "Appletalk" },
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{ETHERTYPE_AARP, "AARP" },
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{ETHERTYPE_IPX, "Netware IPX/SPX"},
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{ETHERTYPE_VINES, "Vines" },
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{ETHERTYPE_TRAIN, "Netmon Train" },
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{ETHERTYPE_LOOP, "Loopback" }, /* Ethernet Loopback */
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{ETHERTYPE_PPPOED, "PPPoE Discovery"},
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{ETHERTYPE_PPPOES, "PPPoE Session" },
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{ETHERTYPE_VLAN, "802.1Q Virtual LAN" },
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{ETHERTYPE_MPLS, "MPLS label switched packet" },
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{ETHERTYPE_MPLS_MULTI, "MPLS multicast label switched packet" },
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{0, NULL } };
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void
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capture_ethertype(guint16 etype, int offset,
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const u_char *pd, packet_counts *ld)
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{
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switch (etype) {
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case ETHERTYPE_IP:
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capture_ip(pd, offset, ld);
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break;
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case ETHERTYPE_IPX:
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capture_ipx(pd, offset, ld);
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break;
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case ETHERTYPE_VLAN:
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capture_vlan(pd, offset, ld);
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break;
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case ETHERTYPE_VINES:
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capture_vines(pd, offset, ld);
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break;
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default:
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ld->other++;
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break;
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}
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}
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void
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ethertype(guint16 etype, tvbuff_t *tvb, int offset_after_etype, packet_info *pinfo,
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proto_tree *tree, proto_tree *fh_tree, int item_id)
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{
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dissector_t sub_dissector;
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char *description;
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tvbuff_t *next_tvb;
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const guint8 *next_pd;
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int next_offset;
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/* Add to proto_tree */
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if (tree) {
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proto_tree_add_uint(fh_tree, item_id, tvb, offset_after_etype - 2, 2, etype);
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}
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next_tvb = tvb_new_subset(tvb, offset_after_etype, -1, -1);
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tvb_compat(next_tvb, &next_pd, &next_offset);
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/* Look for sub-dissector */
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sub_dissector = dissector_lookup( ethertype_dissector_table, etype );
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if (sub_dissector) {
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/* Call sub-dissector */
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sub_dissector(next_pd, next_offset, pinfo->fd, tree);
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}
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else {
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/* Label rest of packet as "Data" */
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dissect_data_tvb(next_tvb, pinfo, tree);
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/* Label protocol */
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switch(etype) {
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case ETHERTYPE_LOOP:
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if (check_col(pinfo->fd, COL_PROTOCOL)) {
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col_add_fstr(pinfo->fd, COL_PROTOCOL, "LOOP");
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}
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break;
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default:
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if (check_col(pinfo->fd, COL_PROTOCOL)) {
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col_add_fstr(pinfo->fd, COL_PROTOCOL, "0x%04x", etype);
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}
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break;
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}
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if (check_col(pinfo->fd, COL_INFO)) {
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description = match_strval(etype, etype_vals);
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if (description) {
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col_add_fstr(pinfo->fd, COL_INFO, "%s", description);
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}
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}
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}
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}
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void
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proto_register_ethertype(void)
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{
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/* subdissector code */
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ethertype_dissector_table = register_dissector_table("ethertype");
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}
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