b0e06bd8d1
Clean up some problems that revealed. svn path=/trunk/; revision=3301
801 lines
25 KiB
C
801 lines
25 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 1.33 2001/04/15 07:30:02 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 "oui.h"
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#include "resolv.h"
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#include "packet-snmp.h"
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#include "packet-sscop.h"
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static int proto_atm = -1;
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static int hf_atm_vpi = -1;
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static int hf_atm_vci = -1;
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static int proto_atm_lane = -1;
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static int proto_ilmi = -1;
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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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static gint ett_atm_lane_lc_tlv = -1;
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static gint ett_ilmi = -1;
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static dissector_handle_t eth_handle;
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static dissector_handle_t tr_handle;
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static dissector_handle_t llc_handle;
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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(tvbuff_t *tvb, packet_info *pinfo, 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_protocol_format(tree, proto_atm_lane, tvb, 0, 2, "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, tvb, 0, 2, "LE Client: 0x%04X",
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tvb_get_ntohs(tvb, 0));
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}
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}
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static void
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dissect_lan_destination(tvbuff_t *tvb, 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, tvb, 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 = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(dest_tree, tvb, offset, 2, "Tag: %s",
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val_to_str(tag, le_control_landest_tag_vals,
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"Unknown (0x%04X)"));
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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, tvb, offset, 6, "MAC address: %s",
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ether_to_str(tvb_get_ptr(tvb, offset, 6)));
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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 = tvb_get_ntohs(tvb, offset);
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trd = proto_tree_add_text(dest_tree, tvb, 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, tvb, 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, tvb, 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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/*
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* TLV values in LE Control frames.
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*/
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#define TLV_TYPE(oui, ident) (((oui) << 8) | (ident))
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#define LE_CONTROL_TIMEOUT TLV_TYPE(OUI_ATM_FORUM, 0x01)
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#define LE_MAX_UNK_FRAME_COUNT TLV_TYPE(OUI_ATM_FORUM, 0x02)
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#define LE_MAX_UNK_FRAME_TIME TLV_TYPE(OUI_ATM_FORUM, 0x03)
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#define LE_VCC_TIMEOUT_PERIOD TLV_TYPE(OUI_ATM_FORUM, 0x04)
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#define LE_MAX_RETRY_COUNT TLV_TYPE(OUI_ATM_FORUM, 0x05)
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#define LE_AGING_TIME TLV_TYPE(OUI_ATM_FORUM, 0x06)
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#define LE_FORWARD_DELAY_TIME TLV_TYPE(OUI_ATM_FORUM, 0x07)
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#define LE_EXPECTED_ARP_RESPONSE_TIME TLV_TYPE(OUI_ATM_FORUM, 0x08)
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#define LE_FLUSH_TIMEOUT TLV_TYPE(OUI_ATM_FORUM, 0x09)
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#define LE_PATH_SWITCHING_DELAY TLV_TYPE(OUI_ATM_FORUM, 0x0A)
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#define LE_LOCAL_SEGMENT_ID TLV_TYPE(OUI_ATM_FORUM, 0x0B)
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#define LE_MCAST_SEND_VCC_TYPE TLV_TYPE(OUI_ATM_FORUM, 0x0C)
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#define LE_MCAST_SEND_VCC_AVGRATE TLV_TYPE(OUI_ATM_FORUM, 0x0D)
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#define LE_MCAST_SEND_VCC_PEAKRATE TLV_TYPE(OUI_ATM_FORUM, 0x0E)
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#define LE_CONN_COMPLETION_TIMER TLV_TYPE(OUI_ATM_FORUM, 0x0F)
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static const value_string le_tlv_type_vals[] = {
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{ LE_CONTROL_TIMEOUT, "Control Time-out" },
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{ LE_MAX_UNK_FRAME_COUNT, "Maximum Unknown Frame Count" },
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{ LE_MAX_UNK_FRAME_TIME, "Maximum Unknown Frame Time" },
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{ LE_VCC_TIMEOUT_PERIOD, "VCC Time-out" },
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{ LE_MAX_RETRY_COUNT, "Maximum Retry Count" },
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{ LE_AGING_TIME, "Aging Time" },
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{ LE_FORWARD_DELAY_TIME, "Forwarding Delay Time" },
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{ LE_EXPECTED_ARP_RESPONSE_TIME, "Expected LE_ARP Response Time" },
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{ LE_FLUSH_TIMEOUT, "Flush Time-out" },
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{ LE_PATH_SWITCHING_DELAY, "Path Switching Delay" },
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{ LE_LOCAL_SEGMENT_ID, "Local Segment ID" },
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{ LE_MCAST_SEND_VCC_TYPE, "Mcast Send VCC Type" },
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{ LE_MCAST_SEND_VCC_AVGRATE, "Mcast Send VCC AvgRate" },
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{ LE_MCAST_SEND_VCC_PEAKRATE, "Mcast Send VCC PeakRate" },
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{ LE_CONN_COMPLETION_TIMER, "Connection Completion Timer" },
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{ 0, NULL },
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};
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static void
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dissect_le_control(tvbuff_t *tvb, packet_info *pinfo, 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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int offset = 0;
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proto_item *tf;
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proto_tree *flags_tree;
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proto_item *ttlv;
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proto_tree *tlv_tree;
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guint16 opcode;
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guint16 flags;
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guint8 num_tlvs;
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guint32 tlv_type;
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guint8 tlv_length;
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if (check_col(pinfo->fd, COL_INFO))
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col_set_str(pinfo->fd, COL_INFO, "LE Control");
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if (tree) {
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ti = proto_tree_add_protocol_format(tree, proto_atm_lane, tvb, offset, 108, "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, tvb, offset, 2, "Marker: 0x%04X",
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tvb_get_ntohs(tvb, offset));
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offset += 2;
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proto_tree_add_text(lane_tree, tvb, offset, 1, "Protocol: 0x%02X",
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tvb_get_guint8(tvb, offset));
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offset += 1;
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proto_tree_add_text(lane_tree, tvb, offset, 1, "Version: 0x%02X",
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tvb_get_guint8(tvb, offset));
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offset += 1;
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opcode = tvb_get_ntohs(tvb, offset);
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proto_tree_add_text(lane_tree, tvb, offset, 2, "Opcode: %s",
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val_to_str(opcode, le_control_opcode_vals,
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"Unknown (0x%04X)"));
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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, tvb, offset, 2, "Status: %s",
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val_to_str(tvb_get_ntohs(tvb, offset), le_control_status_vals,
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"Unknown (0x%04X)"));
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}
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offset += 2;
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proto_tree_add_text(lane_tree, tvb, offset, 4, "Transaction ID: 0x%08X",
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tvb_get_ntohl(tvb, offset));
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offset += 4;
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proto_tree_add_text(lane_tree, tvb, offset, 2, "Requester LECID: 0x%04X",
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tvb_get_ntohs(tvb, offset));
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offset += 2;
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flags = tvb_get_ntohs(tvb, offset);
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tf = proto_tree_add_text(lane_tree, tvb, offset, 2, "Flags: 0x%04X",
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flags);
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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, tvb, 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, tvb, 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, tvb, 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(tvb, offset, "Source", lane_tree);
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offset += 8;
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dissect_lan_destination(tvb, offset, "Target", lane_tree);
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offset += 8;
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proto_tree_add_text(lane_tree, tvb, offset, 20, "Source ATM Address: %s",
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tvb_bytes_to_str(tvb, offset, 20));
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offset += 20;
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proto_tree_add_text(lane_tree, tvb, offset, 1, "LAN type: %s",
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val_to_str(tvb_get_guint8(tvb, offset), le_control_lan_type_vals,
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"Unknown (0x%02X)"));
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offset += 1;
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proto_tree_add_text(lane_tree, tvb, offset, 1, "Maximum frame size: %u",
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tvb_get_guint8(tvb, offset));
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offset += 1;
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num_tlvs = tvb_get_guint8(tvb, offset);
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proto_tree_add_text(lane_tree, tvb, offset, 1, "Number of TLVs: %u",
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num_tlvs);
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offset += 1;
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proto_tree_add_text(lane_tree, tvb, offset, 1, "ELAN name size: %u",
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tvb_get_guint8(tvb, offset));
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offset += 1;
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proto_tree_add_text(lane_tree, tvb, offset, 20, "Target ATM Address: %s",
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tvb_bytes_to_str(tvb, offset, 20));
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offset += 20;
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proto_tree_add_text(lane_tree, tvb, offset, 32, "ELAN name: %s",
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tvb_bytes_to_str(tvb, offset, 32));
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offset += 32;
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while (num_tlvs != 0) {
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tlv_type = tvb_get_ntohl(tvb, offset);
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tlv_length = tvb_get_guint8(tvb, offset+4);
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ttlv = proto_tree_add_text(lane_tree, tvb, offset, 5+tlv_length, "TLV type: %s",
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val_to_str(tlv_type, le_tlv_type_vals, "Unknown (0x%08x)"));
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tlv_tree = proto_item_add_subtree(ttlv, ett_atm_lane_lc_tlv);
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proto_tree_add_text(tlv_tree, tvb, offset, 4, "TLV Type: %s",
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val_to_str(tlv_type, le_tlv_type_vals, "Unknown (0x%08x)"));
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proto_tree_add_text(tlv_tree, tvb, offset+4, 1, "TLV Length: %u", tlv_length);
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offset += 5+tlv_length;
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num_tlvs--;
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}
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}
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}
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static void
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dissect_lane(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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tvbuff_t *next_tvb;
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tvbuff_t *next_tvb_le_client;
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CHECK_DISPLAY_AS_DATA(proto_atm_lane, tvb, pinfo, tree);
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pinfo->current_proto = "ATM LANE";
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "ATM LANE");
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if (check_col(pinfo->fd, COL_INFO))
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col_set_str(pinfo->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 (pinfo->pseudo_header->ngsniffer_atm.AppHLType) {
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case AHLT_LANE_LE_CTRL:
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dissect_le_control(tvb, pinfo, 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(tvb, pinfo, tree);
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/* Dissect as Ethernet */
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next_tvb_le_client = tvb_new_subset(tvb, 2, -1, -1);
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call_dissector(eth_handle, next_tvb_le_client, pinfo, 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(tvb, pinfo, tree);
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/* Dissect as Token-Ring */
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next_tvb_le_client = tvb_new_subset(tvb, 2, -1, -1);
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call_dissector(tr_handle, next_tvb_le_client, pinfo, tree);
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break;
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default:
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/* Dump it as raw data. */
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next_tvb = tvb_new_subset(tvb, 0, -1, -1);
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dissect_data(next_tvb, 0, pinfo, tree);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* AAL types */
|
|
static const value_string aal_vals[] = {
|
|
{ ATT_AAL_UNKNOWN, "Unknown AAL" },
|
|
{ ATT_AAL1, "AAL1" },
|
|
{ ATT_AAL3_4, "AAL3/4" },
|
|
{ ATT_AAL5, "AAL5" },
|
|
{ ATT_AAL_USER, "User AAL" },
|
|
{ ATT_AAL_SIGNALLING, "Signalling AAL" },
|
|
{ ATT_OAMCELL, "OAM cell" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* AAL5 higher-level traffic types */
|
|
static const value_string aal5_hltype_vals[] = {
|
|
{ ATT_HL_UNKNOWN, "Unknown traffic type" },
|
|
{ ATT_HL_LLCMX, "LLC multiplexed" },
|
|
{ ATT_HL_VCMX, "VC multiplexed" },
|
|
{ ATT_HL_LANE, "LANE" },
|
|
{ ATT_HL_ILMI, "ILMI" },
|
|
{ ATT_HL_FRMR, "Frame Relay" },
|
|
{ ATT_HL_SPANS, "FORE SPANS" },
|
|
{ ATT_HL_IPSILON, "Ipsilon" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* Traffic subtypes for VC multiplexed traffic */
|
|
static const value_string vcmx_type_vals[] = {
|
|
{ AHLT_UNKNOWN, "Unknown VC multiplexed traffic type" },
|
|
{ AHLT_VCMX_802_3_FCS, "802.3 FCS" },
|
|
{ AHLT_VCMX_802_4_FCS, "802.4 FCS" },
|
|
{ AHLT_VCMX_802_5_FCS, "802.5 FCS" },
|
|
{ AHLT_VCMX_FDDI_FCS, "FDDI FCS" },
|
|
{ AHLT_VCMX_802_6_FCS, "802.6 FCS" },
|
|
{ AHLT_VCMX_802_3, "802.3" },
|
|
{ AHLT_VCMX_802_4, "802.4" },
|
|
{ AHLT_VCMX_802_5, "802.5" },
|
|
{ AHLT_VCMX_FDDI, "FDDI" },
|
|
{ AHLT_VCMX_802_6, "802.6" },
|
|
{ AHLT_VCMX_FRAGMENTS, "Fragments" },
|
|
{ AHLT_VCMX_BPDU, "BPDU" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* Traffic subtypes for LANE traffic */
|
|
static const value_string lane_type_vals[] = {
|
|
{ AHLT_UNKNOWN, "Unknown LANE traffic type" },
|
|
{ AHLT_LANE_LE_CTRL, "LE Control" },
|
|
{ AHLT_LANE_802_3, "802.3" },
|
|
{ AHLT_LANE_802_5, "802.5" },
|
|
{ AHLT_LANE_802_3_MC, "802.3 multicast" },
|
|
{ AHLT_LANE_802_5_MC, "802.5 multicast" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* Traffic subtypes for Ipsilon traffic */
|
|
static const value_string ipsilon_type_vals[] = {
|
|
{ AHLT_UNKNOWN, "Unknown Ipsilon traffic type" },
|
|
{ AHLT_IPSILON_FT0, "Flow type 0" },
|
|
{ AHLT_IPSILON_FT1, "Flow type 1" },
|
|
{ AHLT_IPSILON_FT2, "Flow type 2" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/*
|
|
* We don't know what kind of traffic this is; try to guess.
|
|
* We at least know it's AAL5....
|
|
*/
|
|
static void
|
|
atm_guess_content(tvbuff_t *tvb, packet_info *pinfo)
|
|
{
|
|
guint8 byte0, byte1, byte2;
|
|
|
|
if (pinfo->pseudo_header->ngsniffer_atm.Vpi == 0) {
|
|
/*
|
|
* Traffic on some PVCs with a VPI of 0 and certain
|
|
* VCIs is of particular types.
|
|
*/
|
|
switch (pinfo->pseudo_header->ngsniffer_atm.Vci) {
|
|
|
|
case 5:
|
|
/*
|
|
* Signalling AAL.
|
|
*/
|
|
pinfo->pseudo_header->ngsniffer_atm.AppTrafType =
|
|
ATT_AAL_SIGNALLING;
|
|
return;
|
|
|
|
case 16:
|
|
/*
|
|
* ILMI.
|
|
*/
|
|
pinfo->pseudo_header->ngsniffer_atm.AppTrafType |=
|
|
ATT_HL_ILMI;
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* OK, we can't tell what it is based on the VPI/VCI; try
|
|
* guessing based on the contents.
|
|
*/
|
|
byte0 = tvb_get_guint8(tvb, 0);
|
|
byte1 = tvb_get_guint8(tvb, 1);
|
|
byte2 = tvb_get_guint8(tvb, 2);
|
|
if (byte0 == 0xaa && byte1 == 0xaa && byte2 == 0x03) {
|
|
/*
|
|
* Looks like a SNAP header; assume it's LLC multiplexed
|
|
* RFC 1483 traffic.
|
|
*/
|
|
pinfo->pseudo_header->ngsniffer_atm.AppTrafType |= ATT_HL_LLCMX;
|
|
} else {
|
|
/*
|
|
* Assume it's LANE.
|
|
*/
|
|
pinfo->pseudo_header->ngsniffer_atm.AppTrafType |= ATT_HL_LANE;
|
|
if (byte0 == 0xff && byte1 == 0x00) {
|
|
/*
|
|
* Looks like LE Control traffic.
|
|
*/
|
|
pinfo->pseudo_header->ngsniffer_atm.AppHLType =
|
|
AHLT_LANE_LE_CTRL;
|
|
} else {
|
|
/*
|
|
* XXX - Ethernet, or Token Ring?
|
|
* Assume Ethernet for now; if we see earlier
|
|
* LANE traffic, we may be able to figure out
|
|
* the traffic type from that, but there may
|
|
* still be situations where the user has to
|
|
* tell us.
|
|
*/
|
|
pinfo->pseudo_header->ngsniffer_atm.AppHLType =
|
|
AHLT_LANE_802_3;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_atm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_tree *atm_tree;
|
|
proto_item *ti;
|
|
guint aal_type;
|
|
guint hl_type;
|
|
|
|
aal_type = pinfo->pseudo_header->ngsniffer_atm.AppTrafType & ATT_AALTYPE;
|
|
hl_type = pinfo->pseudo_header->ngsniffer_atm.AppTrafType & ATT_HLTYPE;
|
|
if (aal_type == ATT_AAL5) {
|
|
if (hl_type == ATT_HL_UNKNOWN ||
|
|
pinfo->pseudo_header->ngsniffer_atm.AppHLType == AHLT_UNKNOWN) {
|
|
/*
|
|
* The joys of a connection-oriented link layer; the type of
|
|
* traffic may be implied by the connection on which it's
|
|
* traveling, rather than being specified in the packet itself.
|
|
*
|
|
* For this packet, the program that captured the packet didn't
|
|
* save the type of traffic, presumably because it didn't know
|
|
* the traffic type (either it didn't see the connection setup
|
|
* and wasn't running on one of the endpoints, and wasn't later
|
|
* told, e.g. by the human running it, what type of traffic was
|
|
* on that circuit, or was running on one of the endpoints but
|
|
* was using, to capture the packets, a mechanism that either
|
|
* doesn't have access to data saying what's going over the
|
|
* connection or doesn't bother providing that information).
|
|
*
|
|
* For now, we try to guess the traffic type based on the VPI/VCI
|
|
* or the packet header; later, we should provide a mechanism
|
|
* by which the user can specify what sort of traffic is on a
|
|
* particular circuit.
|
|
*/
|
|
atm_guess_content(tvb, pinfo);
|
|
|
|
/*
|
|
* OK, now get the AAL type and high-layer type again.
|
|
*/
|
|
aal_type = pinfo->pseudo_header->ngsniffer_atm.AppTrafType & ATT_AALTYPE;
|
|
hl_type = pinfo->pseudo_header->ngsniffer_atm.AppTrafType & ATT_HLTYPE;
|
|
}
|
|
}
|
|
|
|
if (check_col(pinfo->fd, COL_PROTOCOL))
|
|
col_set_str(pinfo->fd, COL_PROTOCOL, "ATM");
|
|
|
|
switch (pinfo->pseudo_header->ngsniffer_atm.channel) {
|
|
|
|
case 0:
|
|
/* Traffic from DCE to DTE. */
|
|
if (check_col(pinfo->fd, COL_RES_DL_DST))
|
|
col_set_str(pinfo->fd, COL_RES_DL_DST, "DTE");
|
|
if (check_col(pinfo->fd, COL_RES_DL_SRC))
|
|
col_set_str(pinfo->fd, COL_RES_DL_SRC, "DCE");
|
|
break;
|
|
|
|
case 1:
|
|
/* Traffic from DTE to DCE. */
|
|
if (check_col(pinfo->fd, COL_RES_DL_DST))
|
|
col_set_str(pinfo->fd, COL_RES_DL_DST, "DCE");
|
|
if (check_col(pinfo->fd, COL_RES_DL_SRC))
|
|
col_set_str(pinfo->fd, COL_RES_DL_SRC, "DTE");
|
|
break;
|
|
}
|
|
|
|
if (check_col(pinfo->fd, COL_INFO)) {
|
|
if (aal_type == ATT_AAL5) {
|
|
col_add_fstr(pinfo->fd, COL_INFO, "AAL5 %s",
|
|
val_to_str(hl_type, aal5_hltype_vals,
|
|
"Unknown traffic type (%x)"));
|
|
} else {
|
|
col_add_str(pinfo->fd, COL_INFO,
|
|
val_to_str(aal_type, aal_vals, "Unknown AAL (%x)"));
|
|
}
|
|
}
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_protocol_format(tree, proto_atm, tvb, 0, 0, "ATM");
|
|
atm_tree = proto_item_add_subtree(ti, ett_atm);
|
|
|
|
proto_tree_add_text(atm_tree, tvb, 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, tvb, 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, tvb, 0, 0, "LLC multiplexed traffic");
|
|
break;
|
|
|
|
case ATT_HL_VCMX:
|
|
proto_tree_add_text(atm_tree, tvb, 0, 0, "VC multiplexed traffic type: %s",
|
|
val_to_str(pinfo->pseudo_header->ngsniffer_atm.AppHLType,
|
|
vcmx_type_vals, "Unknown VCMX traffic type (%x)"));
|
|
break;
|
|
|
|
case ATT_HL_LANE:
|
|
proto_tree_add_text(atm_tree, tvb, 0, 0, "LANE traffic type: %s",
|
|
val_to_str(pinfo->pseudo_header->ngsniffer_atm.AppHLType,
|
|
lane_type_vals, "Unknown LANE traffic type (%x)"));
|
|
break;
|
|
|
|
case ATT_HL_IPSILON:
|
|
proto_tree_add_text(atm_tree, tvb, 0, 0, "Ipsilon traffic type: %s",
|
|
val_to_str(pinfo->pseudo_header->ngsniffer_atm.AppHLType,
|
|
ipsilon_type_vals, "Unknown Ipsilon traffic type (%x)"));
|
|
break;
|
|
}
|
|
}
|
|
proto_tree_add_uint(atm_tree, hf_atm_vpi, tvb, 0, 0,
|
|
pinfo->pseudo_header->ngsniffer_atm.Vpi);
|
|
proto_tree_add_uint(atm_tree, hf_atm_vci, tvb, 0, 0,
|
|
pinfo->pseudo_header->ngsniffer_atm.Vci);
|
|
switch (pinfo->pseudo_header->ngsniffer_atm.channel) {
|
|
|
|
case 0:
|
|
/* Traffic from DCE to DTE. */
|
|
proto_tree_add_text(atm_tree, tvb, 0, 0, "Channel: DCE->DTE");
|
|
break;
|
|
|
|
case 1:
|
|
/* Traffic from DTE to DCE. */
|
|
proto_tree_add_text(atm_tree, tvb, 0, 0, "Channel: DTE->DCE");
|
|
break;
|
|
|
|
default:
|
|
/* Sniffers shouldn't provide anything other than 0 or 1. */
|
|
proto_tree_add_text(atm_tree, tvb, 0, 0, "Channel: %u",
|
|
pinfo->pseudo_header->ngsniffer_atm.channel);
|
|
break;
|
|
}
|
|
if (pinfo->pseudo_header->ngsniffer_atm.cells != 0) {
|
|
/*
|
|
* If the cell count is 0, assume it means we don't know how
|
|
* many cells it was.
|
|
*
|
|
* XXX - also, if this is AAL5 traffic, assume it means we don't
|
|
* know what was in the AAL5 trailer. We may, however, find
|
|
* some capture program that can give us the AAL5 trailer
|
|
* information but not the cell count, in which case we need
|
|
* some other way of indicating whether we have the AAL5 trailer
|
|
* information.
|
|
*/
|
|
proto_tree_add_text(atm_tree, tvb, 0, 0, "Cells: %u",
|
|
pinfo->pseudo_header->ngsniffer_atm.cells);
|
|
if (aal_type == ATT_AAL5) {
|
|
proto_tree_add_text(atm_tree, tvb, 0, 0, "AAL5 U2U: %u",
|
|
pinfo->pseudo_header->ngsniffer_atm.aal5t_u2u);
|
|
proto_tree_add_text(atm_tree, tvb, 0, 0, "AAL5 len: %u",
|
|
pinfo->pseudo_header->ngsniffer_atm.aal5t_len);
|
|
proto_tree_add_text(atm_tree, tvb, 0, 0, "AAL5 checksum: 0x%08X",
|
|
pinfo->pseudo_header->ngsniffer_atm.aal5t_chksum);
|
|
}
|
|
}
|
|
}
|
|
|
|
switch (aal_type) {
|
|
|
|
case ATT_AAL_SIGNALLING:
|
|
dissect_sscop(tvb, pinfo, 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 shows LLC at this point,
|
|
* so that's what I'm calling */
|
|
call_dissector(llc_handle, tvb, pinfo, tree);
|
|
break;
|
|
|
|
case ATT_HL_LANE:
|
|
dissect_lane(tvb, pinfo, tree);
|
|
break;
|
|
|
|
case ATT_HL_ILMI:
|
|
CHECK_DISPLAY_AS_DATA(proto_ilmi, tvb, pinfo, tree);
|
|
dissect_snmp_pdu(tvb, 0, pinfo, tree, "ILMI", proto_ilmi, ett_ilmi);
|
|
break;
|
|
|
|
default:
|
|
if (tree) {
|
|
/* Dump it as raw data. */
|
|
dissect_data(tvb, 0, pinfo, tree);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (tree) {
|
|
/* Dump it as raw data. (Is this a single cell?) */
|
|
dissect_data(tvb, 0, pinfo, tree);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_register_atm(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_atm_vpi,
|
|
{ "VPI", "atm.vpi", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_atm_vci,
|
|
{ "VCI", "atm.vci", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_atm,
|
|
&ett_ilmi,
|
|
&ett_atm_lane,
|
|
&ett_atm_lane_lc_lan_dest,
|
|
&ett_atm_lane_lc_lan_dest_rd,
|
|
&ett_atm_lane_lc_flags,
|
|
&ett_atm_lane_lc_tlv,
|
|
};
|
|
proto_atm = proto_register_protocol("ATM", "ATM", "atm");
|
|
proto_register_field_array(proto_atm, hf, array_length(hf));
|
|
proto_ilmi = proto_register_protocol("ILMI", "ILMI", "ilmi");
|
|
proto_atm_lane = proto_register_protocol("ATM LAN Emulation",
|
|
"ATM LANE", "lane");
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_atm(void)
|
|
{
|
|
/*
|
|
* Get handles for the Ethernet, Token Ring, and LLC dissectors.
|
|
*/
|
|
eth_handle = find_dissector("eth");
|
|
tr_handle = find_dissector("tr");
|
|
llc_handle = find_dissector("llc");
|
|
|
|
dissector_add("wtap_encap", WTAP_ENCAP_ATM_SNIFFER, dissect_atm,
|
|
proto_atm);
|
|
}
|