![Guy Harris](/assets/img/avatar_default.png)
It's in a file of its own, as I think there may be, or may have been proposed, non-ATM uses of it as well. svn path=/trunk/; revision=1064
595 lines
17 KiB
C
595 lines
17 KiB
C
/* packet-atm.c
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* Routines for ATM packet disassembly
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*
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* $Id: packet-atm.c,v 1.7 1999/11/19 07:28:15 guy Exp $
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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 <stdio.h>
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#include <glib.h>
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#include "packet.h"
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#include "resolv.h"
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#if defined(HAVE_UCD_SNMP_SNMP_H) || defined(HAVE_SNMP_SNMP_H)
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#include "packet-snmp.h"
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#endif
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static int proto_atm = -1;
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static int proto_atm_lane = -1;
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#if defined(HAVE_UCD_SNMP_SNMP_H) || defined(HAVE_SNMP_SNMP_H)
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static int proto_ilmi = -1;
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#endif
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static gint ett_atm = -1;
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static gint ett_atm_lane = -1;
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static gint ett_atm_lane_lc_lan_dest = -1;
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static gint ett_atm_lane_lc_lan_dest_rd = -1;
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static gint ett_atm_lane_lc_flags = -1;
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#if defined(HAVE_UCD_SNMP_SNMP_H) || defined(HAVE_SNMP_SNMP_H)
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static gint ett_ilmi = -1;
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#endif
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/*
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* See
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*
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* http://www.atmforum.org/atmforum/specs/approved.html
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*
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* for a number of ATM Forum specifications, e.g. the LAN Emulation
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* over ATM 1.0 spec, whence I got most of this.
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*/
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/* LE Control opcodes */
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#define LE_CONFIGURE_REQUEST 0x0001
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#define LE_CONFIGURE_RESPONSE 0x0101
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#define LE_JOIN_REQUEST 0x0002
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#define LE_JOIN_RESPONSE 0x0102
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#define READY_QUERY 0x0003
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#define READY_IND 0x0103
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#define LE_REGISTER_REQUEST 0x0004
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#define LE_REGISTER_RESPONSE 0x0104
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#define LE_UNREGISTER_REQUEST 0x0005
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#define LE_UNREGISTER_RESPONSE 0x0105
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#define LE_ARP_REQUEST 0x0006
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#define LE_ARP_RESPONSE 0x0106
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#define LE_FLUSH_REQUEST 0x0007
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#define LE_FLUSH_RESPONSE 0x0107
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#define LE_NARP_REQUEST 0x0008
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#define LE_TOPOLOGY_REQUEST 0x0009
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static const value_string le_control_opcode_vals[] = {
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{ LE_CONFIGURE_REQUEST, "LE_CONFIGURE_REQUEST" },
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{ LE_CONFIGURE_RESPONSE, "LE_CONFIGURE_RESPONSE" },
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{ LE_JOIN_REQUEST, "LE_JOIN_REQUEST" },
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{ LE_JOIN_RESPONSE, "LE_JOIN_RESPONSE" },
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{ READY_QUERY, "READY_QUERY" },
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{ READY_IND, "READY_IND" },
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{ LE_REGISTER_REQUEST, "LE_REGISTER_REQUEST" },
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{ LE_REGISTER_RESPONSE, "LE_REGISTER_RESPONSE" },
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{ LE_UNREGISTER_REQUEST, "LE_UNREGISTER_REQUEST" },
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{ LE_UNREGISTER_RESPONSE, "LE_UNREGISTER_RESPONSE" },
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{ LE_ARP_REQUEST, "LE_ARP_REQUEST" },
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{ LE_ARP_RESPONSE, "LE_ARP_RESPONSE" },
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{ LE_FLUSH_REQUEST, "LE_FLUSH_REQUEST" },
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{ LE_FLUSH_RESPONSE, "LE_FLUSH_RESPONSE" },
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{ LE_NARP_REQUEST, "LE_NARP_REQUEST" },
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{ LE_TOPOLOGY_REQUEST, "LE_TOPOLOGY_REQUEST" },
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{ 0, NULL }
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};
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/* LE Control statuses */
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static const value_string le_control_status_vals[] = {
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{ 0, "Success" },
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{ 1, "Version not supported" },
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{ 2, "Invalid request parameters" },
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{ 4, "Duplicate LAN destination registration" },
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{ 5, "Duplicate ATM address" },
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{ 6, "Insufficient resources to grant request" },
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{ 7, "Access denied" },
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{ 8, "Invalid REQUESTOR-ID" },
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{ 9, "Invalid LAN destination" },
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{ 10, "Invalid ATM address" },
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{ 20, "No configuraton" },
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{ 21, "LE_CONFIGURE error" },
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{ 22, "Insufficient information" },
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{ 0, NULL }
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};
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/* LE Control LAN destination tags */
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#define TAG_NOT_PRESENT 0x0000
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#define TAG_MAC_ADDRESS 0x0001
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#define TAG_ROUTE_DESCRIPTOR 0x0002
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static const value_string le_control_landest_tag_vals[] = {
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{ TAG_NOT_PRESENT, "Not present" },
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{ TAG_MAC_ADDRESS, "MAC address" },
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{ TAG_ROUTE_DESCRIPTOR, "Route descriptor" },
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{ 0, NULL }
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};
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/* LE Control LAN types */
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#define LANT_UNSPEC 0x00
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#define LANT_802_3 0x01
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#define LANT_802_5 0x02
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static const value_string le_control_lan_type_vals[] = {
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{ LANT_UNSPEC, "Unspecified" },
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{ LANT_802_3, "Ethernet/802.3" },
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{ LANT_802_5, "802.5" },
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{ 0, NULL }
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};
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static void
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dissect_le_client(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *lane_tree;
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if (tree) {
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ti = proto_tree_add_item_format(tree, proto_atm_lane, offset, 2, NULL,
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"ATM LANE");
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lane_tree = proto_item_add_subtree(ti, ett_atm_lane);
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proto_tree_add_text(lane_tree, offset, 2, "LE Client: 0x%04X",
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pntohs(&pd[offset]));
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}
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}
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static void
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dissect_lan_destination(const u_char *pd, int offset, const char *type, proto_tree *tree)
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{
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proto_item *td;
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proto_tree *dest_tree;
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guint16 tag;
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proto_item *trd;
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proto_tree *rd_tree;
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guint16 route_descriptor;
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td = proto_tree_add_text(tree, offset, 8, "%s LAN destination",
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type);
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dest_tree = proto_item_add_subtree(td, ett_atm_lane_lc_lan_dest);
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tag = pntohs(&pd[offset]);
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proto_tree_add_text(dest_tree, offset, 2, "Tag: %s",
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val_to_str(tag, le_control_landest_tag_vals,
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"Unknown (%x)"));
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offset += 2;
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switch (tag) {
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case TAG_MAC_ADDRESS:
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proto_tree_add_text(dest_tree, offset, 6, "MAC address: %s",
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ether_to_str((u_char *)&pd[offset]));
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break;
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case TAG_ROUTE_DESCRIPTOR:
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offset += 4;
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route_descriptor = pntohs(&pd[offset]);
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trd = proto_tree_add_text(dest_tree, offset, 2, "Route descriptor: 0x%02X",
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route_descriptor);
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rd_tree = proto_item_add_subtree(td, ett_atm_lane_lc_lan_dest_rd);
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proto_tree_add_text(rd_tree, offset, 2,
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decode_numeric_bitfield(route_descriptor, 0xFFF0, 2*8,
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"LAN ID = %u"));
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proto_tree_add_text(rd_tree, offset, 2,
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decode_numeric_bitfield(route_descriptor, 0x000F, 2*8,
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"Bridge number = %u"));
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break;
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}
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}
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static void
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dissect_le_control(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *lane_tree;
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proto_item *tf;
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proto_tree *flags_tree;
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guint16 opcode;
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guint16 flags;
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if (check_col(fd, COL_INFO))
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col_add_str(fd, COL_INFO, "LE Control");
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if (tree) {
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ti = proto_tree_add_item_format(tree, proto_atm_lane, offset, 108, NULL,
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"ATM LANE");
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lane_tree = proto_item_add_subtree(ti, ett_atm_lane);
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proto_tree_add_text(lane_tree, offset, 2, "Marker: 0x%04X",
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pntohs(&pd[offset]));
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offset += 2;
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proto_tree_add_text(lane_tree, offset, 1, "Protocol: 0x%02X",
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pd[offset]);
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offset += 1;
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proto_tree_add_text(lane_tree, offset, 1, "Version: 0x%02X",
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pd[offset]);
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offset += 1;
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opcode = pntohs(&pd[offset]);
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proto_tree_add_text(lane_tree, offset, 2, "Opcode: %s",
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val_to_str(opcode, le_control_opcode_vals,
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"Unknown (%x)"));
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offset += 2;
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if (opcode == READY_QUERY || opcode == READY_IND) {
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/* There's nothing more in this packet. */
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return;
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}
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if (opcode & 0x0100) {
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/* Response; decode status. */
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proto_tree_add_text(lane_tree, offset, 2, "Status: %s",
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val_to_str(pntohs(&pd[offset]), le_control_status_vals,
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"Unknown (%x)"));
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}
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offset += 2;
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proto_tree_add_text(lane_tree, offset, 4, "Transaction ID: 0x%08X",
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pntohl(&pd[offset]));
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offset += 4;
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proto_tree_add_text(lane_tree, offset, 2, "Requester LECID: 0x%04X",
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pntohs(&pd[offset]));
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offset += 2;
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flags = pntohs(&pd[offset]);
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tf = proto_tree_add_text(lane_tree, offset, 2, "Flags: 0x%04X",
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pntohs(&pd[offset]));
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flags_tree = proto_item_add_subtree(tf, ett_atm_lane_lc_flags);
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proto_tree_add_text(flags_tree, offset, 2, "%s",
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decode_boolean_bitfield(flags, 0x0001, 8*2,
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"Remote address", "Local address"));
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proto_tree_add_text(flags_tree, offset, 2, "%s",
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decode_boolean_bitfield(flags, 0x0080, 8*2,
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"Proxy", "Not proxy"));
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proto_tree_add_text(flags_tree, offset, 2, "%s",
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decode_boolean_bitfield(flags, 0x0100, 8*2,
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"Topology change", "No topology change"));
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offset += 2;
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dissect_lan_destination(pd, offset, "Source", lane_tree);
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offset += 8;
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dissect_lan_destination(pd, offset, "Target", lane_tree);
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offset += 8;
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proto_tree_add_text(lane_tree, offset, 20, "Source ATM Address: %s",
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bytes_to_str(&pd[offset], 20));
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offset += 20;
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proto_tree_add_text(lane_tree, offset, 1, "LAN type: %s",
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val_to_str(pd[offset], le_control_lan_type_vals,
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"Unknown (%x)"));
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offset += 1;
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proto_tree_add_text(lane_tree, offset, 1, "Maximum frame size: %u",
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pd[offset]);
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offset += 1;
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proto_tree_add_text(lane_tree, offset, 1, "Number of TLVs: %u",
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pd[offset]);
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offset += 1;
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proto_tree_add_text(lane_tree, offset, 1, "ELAN name size: %u",
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pd[offset]);
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offset += 1;
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proto_tree_add_text(lane_tree, offset, 20, "Target ATM Address: %s",
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bytes_to_str(&pd[offset], 20));
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offset += 20;
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proto_tree_add_text(lane_tree, offset, 32, "ELAN name: %s",
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bytes_to_str(&pd[offset], 32));
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offset += 32;
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}
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}
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static void
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dissect_lane(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
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{
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "ATM LANE");
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if (check_col(fd, COL_INFO))
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col_add_str(fd, COL_INFO, "ATM LANE");
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/* Is it LE Control, 802.3, 802.5, or "none of the above"? */
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switch (fd->pseudo_header.ngsniffer_atm.AppHLType) {
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case AHLT_LANE_LE_CTRL:
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dissect_le_control(pd, offset, fd, tree);
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break;
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case AHLT_LANE_802_3:
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case AHLT_LANE_802_3_MC:
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dissect_le_client(pd, offset, fd, tree);
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offset += 2;
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/* Dissect as Ethernet */
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dissect_eth(pd, offset, fd, tree);
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break;
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case AHLT_LANE_802_5:
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case AHLT_LANE_802_5_MC:
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dissect_le_client(pd, offset, fd, tree);
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offset += 2;
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/* Dissect as Token-Ring */
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dissect_tr(pd, offset, fd, tree);
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break;
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default:
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/* Dump it as raw data. */
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dissect_data(pd, offset, fd, tree);
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break;
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}
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}
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/* AAL types */
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static const value_string aal_vals[] = {
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{ ATT_AAL_UNKNOWN, "Unknown AAL" },
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{ ATT_AAL1, "AAL1" },
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{ ATT_AAL3_4, "AAL3/4" },
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{ ATT_AAL5, "AAL5" },
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{ ATT_AAL_USER, "User AAL" },
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{ ATT_AAL_SIGNALLING, "Signalling AAL" },
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{ ATT_OAMCELL, "OAM cell" },
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{ 0, NULL }
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};
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/* AAL5 higher-level traffic types */
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static const value_string aal5_hltype_vals[] = {
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{ ATT_HL_UNKNOWN, "Unknown traffic type" },
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{ ATT_HL_LLCMX, "LLC multiplexed" },
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{ ATT_HL_VCMX, "VC multiplexed" },
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{ ATT_HL_LANE, "LANE" },
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{ ATT_HL_ILMI, "ILMI" },
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{ ATT_HL_FRMR, "Frame Relay" },
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{ ATT_HL_SPANS, "FORE SPANS" },
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{ ATT_HL_IPSILON, "Ipsilon" },
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{ 0, NULL }
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};
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/* Traffic subtypes for VC multiplexed traffic */
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static const value_string vcmx_type_vals[] = {
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{ AHLT_UNKNOWN, "Unknown VC multiplexed traffic type" },
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{ AHLT_VCMX_802_3_FCS, "802.3 FCS" },
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{ AHLT_VCMX_802_4_FCS, "802.4 FCS" },
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{ AHLT_VCMX_802_5_FCS, "802.5 FCS" },
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{ AHLT_VCMX_FDDI_FCS, "FDDI FCS" },
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{ AHLT_VCMX_802_6_FCS, "802.6 FCS" },
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{ AHLT_VCMX_802_3, "802.3" },
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{ AHLT_VCMX_802_4, "802.4" },
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{ AHLT_VCMX_802_5, "802.5" },
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{ AHLT_VCMX_FDDI, "FDDI" },
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{ AHLT_VCMX_802_6, "802.6" },
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{ AHLT_VCMX_FRAGMENTS, "Fragments" },
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{ AHLT_VCMX_BPDU, "BPDU" },
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{ 0, NULL }
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};
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/* Traffic subtypes for LANE traffic */
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static const value_string lane_type_vals[] = {
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{ AHLT_UNKNOWN, "Unknown LANE traffic type" },
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{ AHLT_LANE_LE_CTRL, "LE Control" },
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{ AHLT_LANE_802_3, "802.3" },
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{ AHLT_LANE_802_5, "802.5" },
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{ AHLT_LANE_802_3_MC, "802.3 multicast" },
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{ AHLT_LANE_802_5_MC, "802.5 multicast" },
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{ 0, NULL }
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};
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/* Traffic subtypes for Ipsilon traffic */
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static const value_string ipsilon_type_vals[] = {
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{ AHLT_UNKNOWN, "Unknown Ipsilon traffic type" },
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{ AHLT_IPSILON_FT0, "Flow type 0" },
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{ AHLT_IPSILON_FT1, "Flow type 1" },
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{ AHLT_IPSILON_FT2, "Flow type 2" },
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{ 0, NULL }
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};
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void
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dissect_atm(const u_char *pd, frame_data *fd, proto_tree *tree)
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{
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int offset = 0;
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proto_tree *atm_tree;
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proto_item *ti;
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guint aal_type;
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guint hl_type;
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aal_type = fd->pseudo_header.ngsniffer_atm.AppTrafType & ATT_AALTYPE;
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hl_type = fd->pseudo_header.ngsniffer_atm.AppTrafType & ATT_HLTYPE;
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "ATM");
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switch (fd->pseudo_header.ngsniffer_atm.channel) {
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case 0:
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/* Traffic from DCE to DTE. */
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if (check_col(fd, COL_RES_DL_DST))
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col_add_str(fd, COL_RES_DL_DST, "DTE");
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if (check_col(fd, COL_RES_DL_SRC))
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col_add_str(fd, COL_RES_DL_SRC, "DCE");
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break;
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case 1:
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/* Traffic from DTE to DCE. */
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if (check_col(fd, COL_RES_DL_DST))
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col_add_str(fd, COL_RES_DL_DST, "DCE");
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if (check_col(fd, COL_RES_DL_SRC))
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col_add_str(fd, COL_RES_DL_SRC, "DTE");
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break;
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}
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if (check_col(fd, COL_INFO)) {
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if (aal_type == ATT_AAL5) {
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col_add_fstr(fd, COL_INFO, "AAL5 %s",
|
|
val_to_str(hl_type, aal5_hltype_vals,
|
|
"Unknown traffic type (%x)"));
|
|
} else {
|
|
col_add_str(fd, COL_INFO,
|
|
val_to_str(aal_type, aal_vals, "Unknown AAL (%x)"));
|
|
}
|
|
}
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item_format(tree, proto_atm, 0, 0, NULL,
|
|
"ATM");
|
|
atm_tree = proto_item_add_subtree(ti, ett_atm);
|
|
|
|
proto_tree_add_text(atm_tree, 0, 0, "AAL: %s",
|
|
val_to_str(aal_type, aal_vals, "Unknown AAL (%x)"));
|
|
if (aal_type == ATT_AAL5) {
|
|
proto_tree_add_text(atm_tree, 0, 0, "Traffic type: %s",
|
|
val_to_str(hl_type, aal5_hltype_vals, "Unknown AAL5 traffic type (%x)"));
|
|
switch (hl_type) {
|
|
|
|
case ATT_HL_LLCMX:
|
|
proto_tree_add_text(atm_tree, 0, 0, "LLC multiplexed traffic");
|
|
break;
|
|
|
|
case ATT_HL_VCMX:
|
|
proto_tree_add_text(atm_tree, 0, 0, "VC multiplexed traffic type: %s",
|
|
val_to_str(fd->pseudo_header.ngsniffer_atm.AppHLType,
|
|
vcmx_type_vals, "Unknown VCMX traffic type (%x)"));
|
|
break;
|
|
|
|
case ATT_HL_LANE:
|
|
proto_tree_add_text(atm_tree, 0, 0, "LANE traffic type: %s",
|
|
val_to_str(fd->pseudo_header.ngsniffer_atm.AppHLType,
|
|
lane_type_vals, "Unknown LANE traffic type (%x)"));
|
|
break;
|
|
|
|
case ATT_HL_IPSILON:
|
|
proto_tree_add_text(atm_tree, 0, 0, "Ipsilon traffic type: %s",
|
|
val_to_str(fd->pseudo_header.ngsniffer_atm.AppHLType,
|
|
ipsilon_type_vals, "Unknown Ipsilon traffic type (%x)"));
|
|
break;
|
|
}
|
|
}
|
|
proto_tree_add_text(atm_tree, 0, 0, "VPI: %u",
|
|
fd->pseudo_header.ngsniffer_atm.Vpi);
|
|
proto_tree_add_text(atm_tree, 0, 0, "VCI: %u",
|
|
fd->pseudo_header.ngsniffer_atm.Vci);
|
|
switch (fd->pseudo_header.ngsniffer_atm.channel) {
|
|
|
|
case 0:
|
|
/* Traffic from DCE to DTE. */
|
|
proto_tree_add_text(atm_tree, 0, 0, "Channel: DCE->DTE");
|
|
break;
|
|
|
|
case 1:
|
|
/* Traffic from DTE to DCE. */
|
|
proto_tree_add_text(atm_tree, 0, 0, "Channel: DTE->DCE");
|
|
break;
|
|
|
|
default:
|
|
/* Sniffers shouldn't provide anything other than 0 or 1. */
|
|
proto_tree_add_text(atm_tree, 0, 0, "Channel: %u",
|
|
fd->pseudo_header.ngsniffer_atm.channel);
|
|
break;
|
|
}
|
|
proto_tree_add_text(atm_tree, 0, 0, "Cells: %u",
|
|
fd->pseudo_header.ngsniffer_atm.cells);
|
|
if (aal_type == ATT_AAL5) {
|
|
proto_tree_add_text(atm_tree, 0, 0, "AAL5 U2U: %u",
|
|
fd->pseudo_header.ngsniffer_atm.aal5t_u2u);
|
|
proto_tree_add_text(atm_tree, 0, 0, "AAL5 len: %u",
|
|
fd->pseudo_header.ngsniffer_atm.aal5t_len);
|
|
proto_tree_add_text(atm_tree, 0, 0, "AAL5 checksum: 0x%08X",
|
|
fd->pseudo_header.ngsniffer_atm.aal5t_chksum);
|
|
}
|
|
}
|
|
|
|
switch (aal_type) {
|
|
|
|
case ATT_AAL_SIGNALLING:
|
|
dissect_sscop(pd, offset, fd, tree);
|
|
break;
|
|
|
|
case ATT_AAL5:
|
|
switch (hl_type) {
|
|
|
|
case ATT_HL_LLCMX:
|
|
/* Dissect as WTAP_ENCAP_ATM_RFC1483 */
|
|
/* The ATM iptrace capture that we have hows LLC at this point,
|
|
* so that's what I'm calling */
|
|
dissect_llc(pd, offset, fd, tree);
|
|
break;
|
|
|
|
case ATT_HL_LANE:
|
|
dissect_lane(pd, offset, fd, tree);
|
|
break;
|
|
|
|
#if defined(HAVE_UCD_SNMP_SNMP_H) || defined(HAVE_SNMP_SNMP_H)
|
|
case ATT_HL_ILMI:
|
|
dissect_snmp_pdu(pd, offset, fd, tree, "ILMI", proto_ilmi, ett_ilmi);
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
if (tree) {
|
|
/* Dump it as raw data. */
|
|
dissect_data(pd, offset, fd, tree);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (tree) {
|
|
/* Dump it as raw data. (Is this a single cell?) */
|
|
dissect_data(pd, offset, fd, tree);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_register_atm(void)
|
|
{
|
|
static gint *ett[] = {
|
|
&ett_atm,
|
|
#if defined(HAVE_UCD_SNMP_SNMP_H) || defined(HAVE_SNMP_SNMP_H)
|
|
&ett_ilmi,
|
|
#endif
|
|
&ett_atm_lane,
|
|
&ett_atm_lane_lc_lan_dest,
|
|
&ett_atm_lane_lc_lan_dest_rd,
|
|
&ett_atm_lane_lc_flags,
|
|
};
|
|
proto_atm = proto_register_protocol("ATM", "atm");
|
|
#if defined(HAVE_UCD_SNMP_SNMP_H) || defined(HAVE_SNMP_SNMP_H)
|
|
proto_ilmi = proto_register_protocol("ILMI", "ilmi");
|
|
#endif
|
|
proto_atm_lane = proto_register_protocol("ATM LANE", "lane");
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|