![Gilbert Ramirez](/assets/img/avatar_default.png)
Also move ncp222.py, x11-fields, process-x11-fields.pl, make-reg-dotc, and make-reg-dotc.py. Adjust #include lines in files that include packet-*.h files. svn path=/trunk/; revision=11410
522 lines
15 KiB
C
522 lines
15 KiB
C
/* packet-tzsp.c
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*
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* $Id$
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*
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* Copyright 2002, Tazmen Technologies Inc
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*
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* Tazmen Sniffer Protocol for encapsulating the packets across a network
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* from a remote packet sniffer. TZSP can encapsulate any other protocol.
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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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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#define UDP_PORT_TZSP 0x9090
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static int proto_tzsp = -1;
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static int hf_tzsp_version = -1;
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static int hf_tzsp_type = -1;
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static int hf_tzsp_encap = -1;
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static const value_string tzsp_type[] = {
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{0, "Received tag list"},
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{1, "Packet for transmit"},
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{2, "Reserved"},
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{3, "Configuration"},
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{4, "Keepalive"},
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{5, "Port opener"},
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{0, NULL}
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};
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static gint ett_tzsp = -1;
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static dissector_handle_t data_handle;
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static dissector_table_t encap_dissector_table;
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/* ************************************************************************* */
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/* WLAN radio header felds */
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/* ************************************************************************* */
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static int hf_status_field = -1;
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static int hf_status_msg_type = -1;
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static int hf_status_pcf = -1;
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static int hf_status_mac_port = -1;
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static int hf_status_undecrypted = -1;
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static int hf_status_fcs_error = -1;
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static int hf_time = -1;
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static int hf_silence = -1;
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static int hf_signal = -1;
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static int hf_rate = -1;
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static int hf_channel = -1;
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static int hf_unknown = -1;
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static int hf_original_length = -1;
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static int hf_sensormac = -1;
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/* ************************************************************************* */
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/* Encapsulation type values */
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/* Note that these are not all the same as DLT_ values */
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/* ************************************************************************* */
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#define TZSP_ENCAP_ETHERNET 1
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#define TZSP_ENCAP_IEEE_802_11 18
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#define TZSP_ENCAP_PRISM_HEADER 119
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#define TZSP_ENCAP_WLAN_AVS 127
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/* ************************************************************************* */
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/* Generic header options */
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/* ************************************************************************* */
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#define TZSP_HDR_PAD 0 /* Pad. */
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#define TZSP_HDR_END 1 /* End of the list. */
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#define TZSP_HDR_ORIGINAL_LENGTH 41 /* Length of the packet before slicing. 2 bytes. */
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#define TZSP_HDR_SENSOR 60 /* Sensor MAC address packet was received on, 6 byte ethernet address.*/
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/* ************************************************************************* */
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/* Options for 802.11 radios */
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/* ************************************************************************* */
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#define WLAN_RADIO_HDR_SIGNAL 10 /* Signal strength in dBm, signed byte. */
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#define WLAN_RADIO_HDR_NOISE 11 /* Noise level in dBm, signed byte. */
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#define WLAN_RADIO_HDR_RATE 12 /* Data rate, unsigned byte. */
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#define WLAN_RADIO_HDR_TIMESTAMP 13 /* Timestamp in us, unsigned 32-bits network byte order. */
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#define WLAN_RADIO_HDR_MSG_TYPE 14 /* Packet type, unsigned byte. */
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#define WLAN_RADIO_HDR_CF 15 /* Whether packet arrived during CF period, unsigned byte. */
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#define WLAN_RADIO_HDR_UN_DECR 16 /* Whether packet could not be decrypted by MAC, unsigned byte. */
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#define WLAN_RADIO_HDR_FCS_ERR 17 /* Whether packet contains an FCS error, unsigned byte. */
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#define WLAN_RADIO_HDR_CHANNEL 18 /* Channel number packet was received on, unsigned byte.*/
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/* ************************************************************************* */
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/* Add option information to the display */
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/* ************************************************************************* */
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static int
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add_option_info(tvbuff_t *tvb, int pos, proto_tree *tree, proto_item *ti)
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{
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guint8 tag, length, fcs_err = 0, encr = 0, seen_fcs_err = 0;
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/*
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* Read all option tags in an endless loop. If the packet is malformed this
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* loop might be a problem.
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*/
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while (TRUE) {
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tag = tvb_get_guint8(tvb, pos++);
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switch (tag) {
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case TZSP_HDR_PAD:
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length = 0;
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break;
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case TZSP_HDR_END:
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/* Fill in header with information from other tags. */
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if (seen_fcs_err) {
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if (tree)
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proto_item_append_text(ti,"%s", fcs_err?"FCS Error":(encr?"Encrypted":"Good"));
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}
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return pos;
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case TZSP_HDR_ORIGINAL_LENGTH:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_int (tree, hf_original_length, tvb, pos-2, 4,
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tvb_get_ntohs(tvb, pos));
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pos += length;
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break;
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case WLAN_RADIO_HDR_SIGNAL:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_int (tree, hf_signal, tvb, pos-2, 3,
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tvb_get_ntohs(tvb, pos));
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pos += length;
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break;
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case WLAN_RADIO_HDR_NOISE:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_int (tree, hf_silence, tvb, pos-2, 3,
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tvb_get_ntohs(tvb, pos));
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pos += length;
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break;
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case WLAN_RADIO_HDR_RATE:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_uint (tree, hf_rate, tvb, pos-2, 3,
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tvb_get_guint8(tvb, pos));
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pos += length;
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break;
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case WLAN_RADIO_HDR_TIMESTAMP:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_uint (tree, hf_time, tvb, pos-2, 6,
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tvb_get_ntohl(tvb, pos));
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pos += length;
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break;
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case WLAN_RADIO_HDR_MSG_TYPE:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_uint (tree, hf_status_msg_type, tvb, pos-2, 3,
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tvb_get_guint8(tvb, pos));
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pos += length;
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break;
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case WLAN_RADIO_HDR_CF:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_boolean (tree, hf_status_pcf, tvb, pos-2, 3,
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tvb_get_guint8(tvb, pos));
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pos += length;
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break;
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case WLAN_RADIO_HDR_UN_DECR:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_boolean (tree, hf_status_undecrypted, tvb, pos-2, 3,
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tvb_get_guint8(tvb, pos));
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encr = tvb_get_guint8(tvb, pos);
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pos += length;
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break;
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case WLAN_RADIO_HDR_FCS_ERR:
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seen_fcs_err = 1;
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_boolean (tree, hf_status_fcs_error, tvb, pos-2, 3,
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tvb_get_guint8(tvb, pos));
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fcs_err = tvb_get_guint8(tvb, pos);
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pos += length;
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break;
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case WLAN_RADIO_HDR_CHANNEL:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_uint (tree, hf_channel, tvb, pos-2, 3,
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tvb_get_guint8(tvb, pos));
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pos += length;
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break;
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case TZSP_HDR_SENSOR:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_ether(tree, hf_sensormac, tvb, pos-2, 6,
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tvb_get_ptr (tvb, pos, 6));
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pos += length;
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break;
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default:
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length = tvb_get_guint8(tvb, pos++);
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if (tree)
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proto_tree_add_bytes(tree, hf_unknown, tvb, pos-2, length+2,
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tvb_get_ptr(tvb, pos, length));
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pos += length;
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break;
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}
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}
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}
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/* ************************************************************************* */
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/* Map TZSP encapsulation types to Wiretap encapsulation types */
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/* ************************************************************************* */
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struct encap_map {
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guint16 tzsp_encap;
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int wtap_encap;
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};
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static const struct encap_map map_table[] = {
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{ TZSP_ENCAP_ETHERNET, WTAP_ENCAP_ETHERNET },
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{ TZSP_ENCAP_PRISM_HEADER, WTAP_ENCAP_PRISM_HEADER },
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{ TZSP_ENCAP_WLAN_AVS, WTAP_ENCAP_IEEE_802_11_WLAN_AVS },
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{ TZSP_ENCAP_IEEE_802_11, WTAP_ENCAP_IEEE_802_11 },
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{ 0, -1 }
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};
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static int
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tzsp_encap_to_wtap_encap(guint16 encap)
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{
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int i;
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for (i = 0; map_table[i].wtap_encap != -1; i++) {
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if (map_table[i].tzsp_encap == encap)
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return map_table[i].wtap_encap;
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}
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return -1;
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}
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/* ************************************************************************* */
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/* Dissect a TZSP packet */
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/* ************************************************************************* */
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static void
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dissect_tzsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *tzsp_tree = NULL;
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proto_item *ti = NULL;
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int pos = 0;
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tvbuff_t *next_tvb;
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guint16 encapsulation = 0;
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int wtap_encap;
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dissector_handle_t encap_dissector;
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char *encap_name, *info;
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guint8 type;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "TZSP");
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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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type = tvb_get_guint8(tvb, 1);
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/* Find the dissector. */
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encapsulation = tvb_get_ntohs(tvb, 2);
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if (encapsulation != 0) {
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wtap_encap = tzsp_encap_to_wtap_encap(encapsulation);
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if (wtap_encap != -1 &&
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(encap_dissector = dissector_get_port_handle(encap_dissector_table, wtap_encap))) {
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encap_name = dissector_handle_get_short_name(encap_dissector);
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}
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else {
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encap_name = "Unknown";
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}
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info = encap_name;
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}
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else {
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wtap_encap = -1;
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encap_name = "Nothing";
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info = tzsp_type[type].strptr;
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}
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if (check_col(pinfo->cinfo, COL_INFO))
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col_set_str(pinfo->cinfo, COL_INFO, info);
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if (tree) {
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/* Adding TZSP item and subtree */
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ti = proto_tree_add_protocol_format(tree, proto_tzsp, tvb, 0,
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-1, "TZSP: %s: ", info);
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tzsp_tree = proto_item_add_subtree(ti, ett_tzsp);
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proto_tree_add_item (tzsp_tree, hf_tzsp_version, tvb, 0, 1,
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FALSE);
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proto_tree_add_uint (tzsp_tree, hf_tzsp_type, tvb, 1, 1,
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type);
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proto_tree_add_uint_format (tzsp_tree, hf_tzsp_encap, tvb, 2, 2,
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encapsulation, "Encapsulates: %s (%d)",
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encap_name, encapsulation);
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}
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if (type != 4 && type != 5) {
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pos = add_option_info(tvb, 4, tzsp_tree, ti);
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if (tree)
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proto_item_set_end(ti, tvb, pos);
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next_tvb = tvb_new_subset(tvb, pos, -1, -1);
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if (encapsulation != 0
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&& (wtap_encap == -1
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|| !dissector_try_port(encap_dissector_table, wtap_encap,
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next_tvb, pinfo, tree))) {
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "UNKNOWN");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_add_fstr(pinfo->cinfo, COL_INFO, "TZSP_ENCAP = %u",
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encapsulation);
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call_dissector(data_handle, next_tvb, pinfo, tree);
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}
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}
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}
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/* ************************************************************************* */
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/* Register the TZSP dissector */
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/* ************************************************************************* */
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void
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proto_register_tzsp(void)
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{
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static const value_string msg_type[] = {
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{0, "Normal"},
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{1, "RFC1042 encoded"},
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{2, "Bridge-tunnel encoded"},
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{4, "802.11 management frame"},
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{0, NULL}
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};
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static const true_false_string pcf_flag = {
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"CF: Frame received during CF period",
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"Not CF"
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};
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static const true_false_string undecr_flag = {
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"Encrypted frame could not be decrypted",
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"Unencrypted"
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};
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static const true_false_string fcs_err_flag = {
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"FCS error, frame is corrupted",
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"Frame is valid"
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};
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static const value_string channels[] = {
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/* 802.11b/g */
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{1, "1 (2.412 GHz)"},
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{2, "2 (2.417 GHz)"},
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{3, "3 (2.422 GHz)"},
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{4, "4 (2.427 GHz)"},
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{5, "5 (2.432 GHz)"},
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{6, "6 (2.437 GHz)"},
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{7, "7 (2.442 GHz)"},
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{8, "8 (2.447 GHz)"},
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{9, "9 (2.452 GHz)"},
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{10, "10 (2.457 GHz)"},
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{11, "11 (2.462 GHz)"},
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{12, "12 (2.467 GHz)"},
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{13, "13 (2.472 GHz)"},
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{14, "14 (2.484 GHz)"},
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/* 802.11a */
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{36, "36 (5.180 GHz)"},
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{40, "40 (5.200 GHz)"},
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{44, "44 (5.220 GHz)"},
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{48, "48 (5.240 GHz)"},
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{52, "52 (5.260 GHz)"},
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{56, "56 (5.280 GHz)"},
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{60, "60 (5.300 GHz)"},
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{64, "64 (5.320 GHz)"},
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{149, "149 (5.745 GHz)"},
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{153, "153 (5.765 GHz)"},
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{157, "157 (5.785 GHz)"},
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{161, "161 (5.805 GHz)"},
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{0, NULL}
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};
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static const value_string rates[] = {
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/* Old PRISM rates */
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{0x0A, "1 Mbit/s"},
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{0x14, "2 Mbit/s"},
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{0x37, "5.5 Mbit/s"},
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{0x6E, "11 Mbit/s"},
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/* MicroAP rates */
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{2, "1 Mbit/s"},
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{4, "2 Mbit/s"},
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{11, "5.5 Mbit/s"},
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{12, "6 Mbit/s"},
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{18, "9 Mbit/s"},
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{22, "11 Mbit/s"},
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{24, "12 Mbit/s"},
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{36, "18 Mbit/s"},
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{48, "24 Mbit/s"},
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{72, "36 Mbit/s"},
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{96, "48 Mbit/s"},
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{108, "54 Mbit/s"},
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{0, NULL}
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};
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static hf_register_info hf[] = {
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{ &hf_tzsp_version, {
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"Version", "tzsp.version", FT_UINT8, BASE_DEC,
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NULL, 0, "Version", HFILL }},
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{ &hf_tzsp_type, {
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"Type", "tzsp.type", FT_UINT8, BASE_DEC,
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VALS(tzsp_type), 0, "Type", HFILL }},
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{ &hf_tzsp_encap, {
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"Encapsulation", "tzsp.encap", FT_UINT16, BASE_DEC,
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NULL, 0, "Encapsulation", HFILL }},
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{ &hf_status_field, {
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"Status", "tzsp.wlan.status", FT_UINT16, BASE_HEX,
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NULL, 0, "Status", HFILL }},
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{ &hf_status_msg_type, {
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"Type", "tzsp.wlan.status.msg_type", FT_UINT8, BASE_HEX,
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VALS(msg_type), 0, "Message type", HFILL }},
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{ &hf_status_mac_port, {
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"Port", "tzsp.wlan.status.mac_port", FT_UINT8, BASE_DEC,
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NULL, 0, "MAC port", HFILL }},
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{ &hf_status_pcf, {
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"PCF", "tzsp.wlan.status.pcf", FT_BOOLEAN, BASE_HEX,
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TFS (&pcf_flag), 0, "Point Coordination Function", HFILL }},
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{ &hf_status_undecrypted, {
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"Undecrypted", "tzsp.wlan.status.undecrypted", FT_BOOLEAN, BASE_HEX,
|
|
TFS (&undecr_flag), 0, "Undecrypted", HFILL }},
|
|
{ &hf_status_fcs_error, {
|
|
"FCS", "tzsp.wlan.status.fcs_err", FT_BOOLEAN, BASE_HEX,
|
|
TFS (&fcs_err_flag), 0, "Frame check sequence", HFILL }},
|
|
{ &hf_time, {
|
|
"Time", "tzsp.wlan.time", FT_UINT32, BASE_HEX,
|
|
NULL, 0, "Time", HFILL }},
|
|
{ &hf_silence, {
|
|
"Silence", "tzsp.wlan.silence", FT_INT8, BASE_HEX,
|
|
NULL, 0, "Silence", HFILL }},
|
|
{ &hf_original_length, {
|
|
"Original Length", "tzsp.original_length", FT_INT16, BASE_DEC,
|
|
NULL, 0, "OrigLength", HFILL }},
|
|
{ &hf_signal, {
|
|
"Signal", "tzsp.wlan.signal", FT_INT8, BASE_HEX,
|
|
NULL, 0, "Signal", HFILL }},
|
|
{ &hf_rate, {
|
|
"Rate", "tzsp.wlan.rate", FT_UINT8, BASE_HEX,
|
|
VALS(rates), 0, "Rate", HFILL }},
|
|
{ &hf_channel, {
|
|
"Channel", "tzsp.wlan.channel", FT_UINT8, BASE_DEC,
|
|
VALS(channels), 0, "Channel", HFILL }},
|
|
{ &hf_unknown, {
|
|
"Unknown tag", "tzsp.unknown", FT_BYTES, BASE_HEX,
|
|
NULL, 0, "Unknown", HFILL }},
|
|
{ &hf_sensormac, {
|
|
"Sensor Address", "tzsp.sensormac", FT_ETHER, BASE_HEX,
|
|
NULL, 0, "Sensor MAC", HFILL }}
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_tzsp
|
|
};
|
|
|
|
proto_tzsp = proto_register_protocol("Tazmen Sniffer Protocol", "TZSP",
|
|
"tzsp");
|
|
proto_register_field_array(proto_tzsp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_tzsp(void)
|
|
{
|
|
dissector_handle_t tzsp_handle;
|
|
|
|
tzsp_handle = create_dissector_handle(dissect_tzsp, proto_tzsp);
|
|
dissector_add("udp.port", UDP_PORT_TZSP, tzsp_handle);
|
|
|
|
/* Get the data dissector for handling unknown encapsulation types. */
|
|
data_handle = find_dissector("data");
|
|
|
|
/* Register this protocol as an ecapsulation type. */
|
|
dissector_add("wtap_encap", WTAP_ENCAP_TZSP, tzsp_handle);
|
|
|
|
encap_dissector_table = find_dissector_table("wtap_encap");
|
|
}
|