![Ulf Lamping](/assets/img/avatar_default.png)
-use g_snprintf instead of sprintf and snprintf -use g_strdup_printf where appropriate -remove #include "snprintf.h" (as only g_snprintf should be used) -replace some more alloc/realloc/calloc/free with their glib pendants svn path=/trunk/; revision=15264
609 lines
20 KiB
C
609 lines
20 KiB
C
/* packet-lwapp.c
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*
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* Routines for LWAPP encapsulated packet disassembly
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* draft-ohara-capwap-lwapp-N (the current draft is 0)
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*
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* $Id$
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*
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* Copyright (c) 2003 by David Frascone <dave@frascone.com>
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <time.h>
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#include <glib.h>
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#include <epan/filesystem.h>
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#include <epan/xmlstub.h>
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#include <epan/packet.h>
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#include <epan/addr_resolv.h>
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#include <epan/prefs.h>
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#define LWAPP_FLAGS_T 0x04
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#define LWAPP_FLAGS_F 0x02
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#define LWAPP_FLAGS_FT 0x01
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static gint proto_lwapp = -1;
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static gint proto_lwapp_l3 = -1;
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static gint proto_lwapp_control = -1;
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static gint ett_lwapp = -1;
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static gint ett_lwapp_l3 = -1;
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static gint ett_lwapp_flags = -1;
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static gint ett_lwapp_control = -1;
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static gint hf_lwapp_version = -1;
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static gint hf_lwapp_slotid = -1;
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static gint hf_lwapp_flags_type = -1;
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static gint hf_lwapp_flags_fragment = -1;
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static gint hf_lwapp_flags_fragment_type = -1;
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static gint hf_lwapp_fragment_id = -1;
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static gint hf_lwapp_length = -1;
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static gint hf_lwapp_rssi = -1;
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static gint hf_lwapp_snr = -1;
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static gint hf_lwapp_control = -1;
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static gint hf_lwapp_control_mac = -1;
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static gint hf_lwapp_control_type = -1;
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static gint hf_lwapp_control_seq_no = -1;
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static gint hf_lwapp_control_length = -1;
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static dissector_handle_t eth_withoutfcs_handle;
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static dissector_handle_t wlan_handle;
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static dissector_handle_t wlan_bsfc_handle;
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static dissector_handle_t data_handle;
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/* Set by preferences */
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static gboolean swap_frame_control;
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typedef struct {
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guint8 flags;
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guint8 fragmentId;
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guint16 length;
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guint8 rssi;
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guint8 snr;
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} LWAPP_Header;
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typedef struct {
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guint8 tag;
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guint16 length;
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} CNTL_Data_Header;
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typedef struct {
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guint8 type;
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guint8 seqNo;
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guint16 length;
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} CNTL_Header;
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typedef enum {
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RESULT_CODE = 1,
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MWAR_ADDR_PAYLOAD,
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RAD_PAYLOAD,
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RAD_SLOT_PAYLOAD,
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RAD_NAME_PAYLOAD,
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MWAR_PAYLOAD,
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VAP_PAYLOAD,
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STATION_CFG_PAYLOAD,
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OPERATION_RATE_SET_PAYLOAD,
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MULTI_DOMAIN_CAPABILITY_PAYLOAD,
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MAC_OPERATION_PAYLOAD,
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PHY_TX_POWER_PAYLOAD,
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PHY_TX_POWER_LEVEL_PAYLOAD,
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PHY_DSSS_PAYLOAD,
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PHY_OFDM_PAYLOAD,
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SUPPORTED_RATES_PAYLOAD,
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AUTH_PAYLOAD,
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TEST_PAYLOAD,
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RRM_NEIGHBOR_CTRL_PAYLOAD,
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RRM_NOISE_CTRL_PAYLOAD,
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RRM_NOISE_DATA_PAYLOAD,
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RRM_INTERFERENCE_CTRL_PAYLOAD,
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RRM_INTERFERENCE_DATA_PAYLOAD,
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RRM_LOAD_CTRL_PAYLOAD,
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RRM_LOAD_DATA_PAYLOAD,
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CHANGE_STATE_EVENT_PAYLOAD,
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ADMIN_STATE_PAYLOAD,
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DELETE_VAP_PAYLOAD,
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ADD_MOBILE_PAYLOAD,
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DELETE_MOBILE_PAYLOAD
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} control_tags;
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typedef enum
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{
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DISCOVERY_REQUEST = 1,
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DISCOVERY_REPLY,
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JOIN_REQUEST,
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JOIN_REPLY,
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HANDOFF_REQUEST,
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HANDOFF_REPLY,
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HANDOFF_COMMAND,
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HANDOFF_RESPONSE,
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HANDOFF_CONFIRM,
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CONFIGURE_REQUEST,
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CONFIGURE_RESPONSE,
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CONFIGURE_COMMAND,
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CONFIGURE_COMMAND_RES,
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STATISTICS_INFO,
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STATISTICS_INFO_RES,
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CHANGE_STATE_EVENT,
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CHANGE_STATE_EVENT_RES,
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RRM_CONTROL_REQ,
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RRM_CONTROL_RES,
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RRM_DATA_REQ,
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RRM_DATA_RES,
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ECHO_REQUEST,
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ECHO_RESPONSE,
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IMAGE_DATA,
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IMAGE_DATA_RES,
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RESET_REQ,
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RESET_RES,
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I_AM_UP_REQ,
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I_AM_UP_RES,
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KEY_UPDATE_REQ,
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KEY_UPDATE_RES,
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PRIMARY_DISCOVERY_REQ,
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PRIMARY_DISCOVERY_RES,
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DATA_TRANSFER,
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DATA_TRANSFER_RES,
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RESET_REQ_CLEAR_CONFIG
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}CNTLMsgType;
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const value_string control_msg_vals[] = {
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{DISCOVERY_REQUEST, "DISCOVERY_REQUEST"},
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{DISCOVERY_REPLY, "DISCOVERY_REPLY"},
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{JOIN_REQUEST, "JOIN_REQUEST"},
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{JOIN_REPLY, "JOIN_REPLY"},
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{HANDOFF_REQUEST, "HANDOFF_REQUEST"},
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{HANDOFF_REPLY, "HANDOFF_REPLY"},
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{HANDOFF_COMMAND, "HANDOFF_COMMAND"},
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{HANDOFF_RESPONSE, "HANDOFF_RESPONSE"},
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{HANDOFF_CONFIRM, "HANDOFF_CONFIRM"},
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{CONFIGURE_REQUEST, "CONFIGURE_REQUEST"},
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{CONFIGURE_RESPONSE, "CONFIGURE_RESPONSE"},
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{CONFIGURE_COMMAND, "CONFIGURE_COMMAND"},
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{CONFIGURE_COMMAND_RES, "CONFIGURE_COMMAND_RES"},
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{STATISTICS_INFO, "STATISTICS_INFO"},
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{STATISTICS_INFO_RES, "STATISTICS_INFO_RES"},
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{CHANGE_STATE_EVENT, "CHANGE_STATE_EVENT"},
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{CHANGE_STATE_EVENT_RES, "CHANGE_STATE_EVENT_RES"},
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{RRM_CONTROL_REQ, "RRM_CONTROL_REQ"},
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{RRM_CONTROL_RES, "RRM_CONTROL_RES"},
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{RRM_DATA_REQ, "RRM_DATA_REQ"},
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{RRM_DATA_RES, "RRM_DATA_RES"},
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{ECHO_REQUEST, "ECHO_REQUEST"},
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{ECHO_RESPONSE, "ECHO_RESPONSE"},
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{IMAGE_DATA, "IMAGE_DATA"},
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{IMAGE_DATA_RES, "IMAGE_DATA_RES"},
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{RESET_REQ, "RESET_REQ"},
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{RESET_RES, "RESET_RES"},
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{I_AM_UP_RES, "I_AM_UP_RES"},
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{I_AM_UP_RES, "I_AM_UP_RES"},
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{KEY_UPDATE_REQ, "KEY_UPDATE_REQ"},
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{KEY_UPDATE_RES, "KEY_UPDATE_RES"},
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{PRIMARY_DISCOVERY_REQ, "PRIMARY_DISCOVERY_REQ"},
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{PRIMARY_DISCOVERY_RES, "PRIMARY_DISCOVERY_RES"},
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{DATA_TRANSFER, "DATA_TRANSFER"},
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{DATA_TRANSFER_RES, "DATA_TRANSFER_RES"},
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{RESET_REQ_CLEAR_CONFIG, "RESET_REQ_CLEAR_CONFIG"},
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{ 0, NULL}
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};
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const value_string control_tag_vals[] = {
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{RESULT_CODE, "RESULT_CODE"},
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{MWAR_ADDR_PAYLOAD, "MWAR_ADDR_PAYLOAD"},
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{RAD_PAYLOAD, "RAD_PAYLOAD"},
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{RAD_SLOT_PAYLOAD, "RAD_SLOT_PAYLOAD"},
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{RAD_NAME_PAYLOAD, "RAD_NAME_PAYLOAD"},
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{MWAR_PAYLOAD, "MWAR_PAYLOAD"},
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{VAP_PAYLOAD, "VAP_PAYLOAD"},
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{STATION_CFG_PAYLOAD, "STATION_CFG_PAYLOAD"},
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{OPERATION_RATE_SET_PAYLOAD, "OPERATION_RATE_SET_PAYLOAD"},
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{MULTI_DOMAIN_CAPABILITY_PAYLOAD, "MULTI_DOMAIN_CAPABILITY_PAYLOAD"},
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{MAC_OPERATION_PAYLOAD, "MAC_OPERATION_PAYLOAD"},
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{PHY_TX_POWER_PAYLOAD, "PHY_TX_POWER_PAYLOAD"},
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{PHY_TX_POWER_LEVEL_PAYLOAD, "PHY_TX_POWER_LEVEL_PAYLOAD"},
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{PHY_DSSS_PAYLOAD, "PHY_DSSS_PAYLOAD"},
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{PHY_OFDM_PAYLOAD, "PHY_OFDM_PAYLOAD"},
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{SUPPORTED_RATES_PAYLOAD, "SUPPORTED_RATES_PAYLOAD"},
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{AUTH_PAYLOAD, "AUTH_PAYLOAD"},
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{TEST_PAYLOAD, "TEST_PAYLOAD"},
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{RRM_NEIGHBOR_CTRL_PAYLOAD, "RRM_NEIGHBOR_CTRL_PAYLOAD"},
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{RRM_NOISE_CTRL_PAYLOAD, "RRM_NOISE_CTRL_PAYLOAD"},
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{RRM_NOISE_DATA_PAYLOAD, "RRM_NOISE_DATA_PAYLOAD"},
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{RRM_INTERFERENCE_CTRL_PAYLOAD, "RRM_INTERFERENCE_CTRL_PAYLOAD"},
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{RRM_INTERFERENCE_DATA_PAYLOAD, "RRM_INTERFERENCE_DATA_PAYLOAD"},
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{RRM_LOAD_CTRL_PAYLOAD, "RRM_LOAD_CTRL_PAYLOAD"},
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{RRM_LOAD_DATA_PAYLOAD, "RRM_LOAD_DATA_PAYLOAD"},
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{CHANGE_STATE_EVENT_PAYLOAD, "CHANGE_STATE_EVENT_PAYLOAD"},
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{ADMIN_STATE_PAYLOAD, "ADMIN_STATE_PAYLOAD"},
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{DELETE_VAP_PAYLOAD, "DELETE_VAP_PAYLOAD"},
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{ADD_MOBILE_PAYLOAD, "ADD_MOBILE_PAYLOAD"},
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{DELETE_MOBILE_PAYLOAD, "DELETE_MOBILE_PAYLOAD"},
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{0, NULL}
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};
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static const true_false_string lwapp_flags_type = {
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"LWAPP Control Packet" ,
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"Encapsulated 80211"
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};
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static const true_false_string lwapp_set_truth = {
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"Not Set",
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"Set"
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};
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/*
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* dissect lwapp control packets. This is not fully implemented,
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* but it's a good start.
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*/
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static void dissect_control(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree)
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{
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CNTL_Header header;
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proto_tree *control_tree;
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tvbuff_t *next_tvb;
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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size_t offset=0;
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "LWAPP");
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_clear(pinfo->cinfo, COL_INFO);
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col_add_str(pinfo->cinfo, COL_INFO,
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"CNTL ");
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}
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/* Copy our header */
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tvb_memcpy(tvb, (guint8*) &header, offset, sizeof(header));
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/*
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* Fix the length (network byte ordering), and set our version &
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* slot id
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*/
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header.length = g_ntohs(header.length);
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_str(pinfo->cinfo, COL_INFO,
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val_to_str(header.type, control_msg_vals, "Bad Type: 0x%02x"));
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}
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/* In the interest of speed, if "tree" is NULL, don't do any work not
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necessary to generate protocol tree items. */
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if (tree) {
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_lwapp_control, tvb, offset,
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-1, FALSE);
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control_tree = proto_item_add_subtree(ti, ett_lwapp_control);
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proto_tree_add_uint(control_tree, hf_lwapp_control_type,
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tvb, offset, 1, header.type);
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offset++;
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proto_tree_add_uint(control_tree, hf_lwapp_control_seq_no,
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tvb, offset, 1, header.seqNo);
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offset++;
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proto_tree_add_uint(control_tree, hf_lwapp_control_length,
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tvb, offset, 2, header.length);
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offset += 2;
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/* Dissect rest of packet as data */
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next_tvb = tvb_new_subset(tvb, offset, -1, -1);
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call_dissector(data_handle,next_tvb, pinfo, tree);
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}
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} /* dissect_control */
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/*
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* This lwapp dissector assumes that there is an 802.3 header at
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* the start of the packet, so it simply re-calls the ethernet
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* dissector on the packet.
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*/
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static void dissect_lwapp_l3(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *lwapp_tree;
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size_t offset=0;
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tvbuff_t *next_client;
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "LWAPP-L3");
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_clear(pinfo->cinfo, COL_INFO);
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col_add_str(pinfo->cinfo, COL_INFO, "802.3 Packets over Layer 3");
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}
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if (tree) {
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_lwapp_l3, tvb, offset,
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-1, FALSE);
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lwapp_tree = proto_item_add_subtree(ti, ett_lwapp_l3);
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}
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/* Dissect as Ethernet */
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next_client = tvb_new_subset(tvb, 0, -1, -1);
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call_dissector(eth_withoutfcs_handle, next_client, pinfo, tree);
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return;
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} /* dissect_lwapp_l3*/
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/*
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* This dissector dissects the lwapp protocol itself. It assumes an
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* lwapp payload in the data, and doesn't care whether the data was
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* from a UDP packet, or a Layer 2 one.
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*/
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static void dissect_lwapp(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree)
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{
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LWAPP_Header header;
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guint8 slotId;
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guint8 version;
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proto_tree *lwapp_tree;
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proto_tree *flags_tree;
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tvbuff_t *next_client;
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guint8 dest_mac[6];
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guint8 have_destmac=0;
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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size_t offset=0;
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "LWAPP");
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_clear(pinfo->cinfo, COL_INFO);
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col_add_str(pinfo->cinfo, COL_INFO,
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"LWAPP IP or Layer 2");
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}
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/* First, set up our dest mac, if we're a control packet with a
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* dest of port 12223 */
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if (pinfo->destport == 12223 ) {
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tvb_memcpy(tvb, dest_mac, offset, 6);
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have_destmac = 1;
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/* Copy our header */
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tvb_memcpy(tvb, (guint8*) &header, offset + 6, sizeof(header));
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} else {
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/* Copy our header */
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tvb_memcpy(tvb, (guint8*) &header, offset, sizeof(header));
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}
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/*
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* Fix the length (network byte ordering), and set our version &
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* slot id
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*/
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header.length = g_ntohs(header.length);
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version = (header.flags & 0xc0) >> 6;
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slotId = (header.flags & 0x38) >> 3;
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if (check_col(pinfo->cinfo, COL_INFO)) {
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if ((header.flags & LWAPP_FLAGS_T) != 0)
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col_append_str(pinfo->cinfo, COL_INFO,
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" Control Packet");
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else
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col_append_str(pinfo->cinfo, COL_INFO,
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" 802.11 Packet");
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}
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/* In the interest of speed, if "tree" is NULL, don't do any work not
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necessary to generate protocol tree items. */
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if (tree) {
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_lwapp, tvb, offset, -1, FALSE);
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lwapp_tree = proto_item_add_subtree(ti, ett_lwapp);
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if (have_destmac) {
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proto_tree_add_ether(lwapp_tree, hf_lwapp_control_mac, tvb, offset,
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6, dest_mac);
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offset += 6;
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}
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proto_tree_add_uint(lwapp_tree, hf_lwapp_version,
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tvb, offset, 1, version);
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proto_tree_add_uint(lwapp_tree, hf_lwapp_slotid,
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tvb, offset, 1, slotId);
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flags_tree = proto_item_add_subtree(lwapp_tree, ett_lwapp_flags);
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proto_tree_add_boolean(flags_tree, hf_lwapp_flags_type,
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tvb, offset, 1, header.flags);
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proto_tree_add_boolean(flags_tree, hf_lwapp_flags_fragment,
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tvb, offset, 1, header.flags);
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proto_tree_add_boolean(flags_tree, hf_lwapp_flags_fragment_type,
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tvb, offset, 1, header.flags);
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offset++;
|
|
|
|
proto_tree_add_uint(lwapp_tree, hf_lwapp_fragment_id,
|
|
tvb, offset, 1, header.fragmentId);
|
|
offset++;
|
|
|
|
proto_tree_add_uint(lwapp_tree, hf_lwapp_length,
|
|
tvb, offset, 2, header.length);
|
|
offset += 2;
|
|
|
|
proto_tree_add_uint(lwapp_tree, hf_lwapp_rssi,
|
|
tvb, offset, 1, header.rssi);
|
|
offset++;
|
|
proto_tree_add_uint(lwapp_tree, hf_lwapp_snr,
|
|
tvb, offset, 1, header.snr);
|
|
offset++;
|
|
|
|
|
|
} /* tree */
|
|
|
|
next_client = tvb_new_subset(tvb, (have_destmac?6:0) + sizeof(LWAPP_Header), -1, -1);
|
|
if ((header.flags & LWAPP_FLAGS_T) == 0) {
|
|
call_dissector(swap_frame_control ? wlan_bsfc_handle : wlan_handle,
|
|
next_client, pinfo, tree);
|
|
} else {
|
|
dissect_control(next_client, pinfo, tree);
|
|
}
|
|
return;
|
|
|
|
} /* dissect_lwapp*/
|
|
|
|
/* registration with the filtering engine */
|
|
void
|
|
proto_register_lwapp(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_lwapp_version,
|
|
{ "Version", "lwapp.version", FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
"", HFILL }},
|
|
{ &hf_lwapp_slotid,
|
|
{ "slotId","lwapp.slotId", FT_UINT24, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
{ &hf_lwapp_flags_type,
|
|
{ "Type", "lwapp.flags.type", FT_BOOLEAN, 8,
|
|
TFS(&lwapp_flags_type), LWAPP_FLAGS_T, "", HFILL }},
|
|
{ &hf_lwapp_flags_fragment,
|
|
{ "Fragment", "lwapp.flags.fragment", FT_BOOLEAN, 8,
|
|
TFS(&lwapp_set_truth), LWAPP_FLAGS_F,
|
|
"", HFILL }},
|
|
{ &hf_lwapp_flags_fragment_type,
|
|
{ "Fragment Type", "lwapp.flags.fragmentType", FT_BOOLEAN, 8,
|
|
TFS(&lwapp_set_truth), LWAPP_FLAGS_FT,
|
|
"", HFILL }},
|
|
{ &hf_lwapp_fragment_id,
|
|
{ "Fragment Id","lwapp.fragmentId", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{ &hf_lwapp_length,
|
|
{ "Length","lwapp.Length", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
{ &hf_lwapp_rssi,
|
|
{ "RSSI","lwapp.rssi", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{ &hf_lwapp_snr,
|
|
{ "SNR","lwapp.snr", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{ &hf_lwapp_control,
|
|
{ "Control Data (not dissected yet)","lwapp.control", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, "", HFILL }},
|
|
{ &hf_lwapp_control_mac,
|
|
{ "AP Identity", "lwapp.apid", FT_ETHER, BASE_NONE, NULL, 0x0,
|
|
"Access Point Identity", HFILL }},
|
|
{ &hf_lwapp_control_type,
|
|
{ "Control Type", "lwapp.control.type", FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
"", HFILL }},
|
|
{ &hf_lwapp_control_seq_no,
|
|
{ "Control Sequence Number", "lwapp.control.seqno", FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
"", HFILL }},
|
|
{ &hf_lwapp_control_length,
|
|
{ "Control Length","lwapp.control.length", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_lwapp_l3,
|
|
&ett_lwapp,
|
|
&ett_lwapp_control,
|
|
&ett_lwapp_flags
|
|
};
|
|
module_t *lwapp_module;
|
|
|
|
proto_lwapp = proto_register_protocol ("LWAPP Encapsulated Packet",
|
|
"LWAPP", "lwapp");
|
|
|
|
proto_lwapp_l3 = proto_register_protocol ("LWAPP Layer 3 Packet",
|
|
"LWAPP-L3", "lwapp-l3");
|
|
|
|
proto_lwapp_control = proto_register_protocol ("LWAP Control Message",
|
|
"LWAPP-CNTL", "lwapp-cntl");
|
|
proto_register_field_array(proto_lwapp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
lwapp_module = prefs_register_protocol(proto_lwapp, NULL);
|
|
|
|
prefs_register_bool_preference(lwapp_module,"swap_fc","Swap Frame Control",
|
|
"Swap frame control bytes (needed for some APs",
|
|
&swap_frame_control);
|
|
|
|
} /* proto_register_diameter */
|
|
|
|
void
|
|
proto_reg_handoff_lwapp(void)
|
|
{
|
|
dissector_handle_t lwapp_l3_handle;
|
|
dissector_handle_t lwapp_handle;
|
|
|
|
/*
|
|
* Get handles for the Ethernet and wireless dissectors.
|
|
*/
|
|
eth_withoutfcs_handle = find_dissector("eth_withoutfcs");
|
|
wlan_handle = find_dissector("wlan");
|
|
wlan_bsfc_handle = find_dissector("wlan_bsfc");
|
|
data_handle = find_dissector("data");
|
|
|
|
/* This dissector assumes lwapp packets in an 802.3 frame */
|
|
lwapp_l3_handle = create_dissector_handle(dissect_lwapp_l3, proto_lwapp_l3);
|
|
|
|
/* This dissector assumes a lwapp packet */
|
|
lwapp_handle = create_dissector_handle(dissect_lwapp, proto_lwapp);
|
|
|
|
/*
|
|
* Ok, the following deserves some comments. We have four
|
|
* different ways lwapp can appear on the wire. Mostly, this is
|
|
* because lwapp is such a new protocol.
|
|
*
|
|
* First, lwapp can join on multiple udp ports, as encapsulated
|
|
* packets on top of UDP. In this case, there is a full raw
|
|
* ethernet frame inside of the UDP packet. This method is
|
|
* becoming obscelete, but we still wanted to dissect the
|
|
* packets.
|
|
*
|
|
* Next, lwapp can be over UDP, but packged for L3 tunneling. This
|
|
* is the new-style. In this case, LWAP headers are just transmitted
|
|
* via UDP.
|
|
*
|
|
* The last method is lwapp directly over layer 2. For this, we
|
|
* dissect two different ethertypes (until IANA gives us one)
|
|
*
|
|
*/
|
|
|
|
/* Obsceleted LWAP via encapsulated 802.3 over UDP */
|
|
|
|
dissector_add("udp.port", 12220, lwapp_l3_handle);
|
|
|
|
/* new-style lwapp directly over UDP: L3-lwapp*/
|
|
dissector_add("udp.port", 12222, lwapp_handle);
|
|
dissector_add("udp.port", 12223, lwapp_handle);
|
|
|
|
/* Lwapp over L2 */
|
|
dissector_add("ethertype", 0x88bb, lwapp_handle);
|
|
dissector_add("ethertype", 0xbbbb, lwapp_handle);
|
|
|
|
}
|