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wireshark/epan/dissectors/packet-peekremote.c

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/* packet-peekremote.c
*
* Routines for the disassembly of packets sent from Cisco WLAN
* Controllers, possibly other Cisco access points, and possibly
* other devices such as Aruba access points. See
*
* https://web.archive.org/web/20130117041444/http://www.wildpackets.com/elements/omnipeek/OmniPeek_UserGuide.pdf
*
* which speaks of Aruba access points supporting remote capture and
* defaulting to port 5000 for this, and also speaks of Cisco access
* points supporting remote capture without any reference to a port
* number. The two types of remote capture are described separately;
* there's no indication of whether they use the same protocol for
* streaming packets but perhaps other protocols for, for example,
* discovery and setup, or whether they use different protocols
* for streaming packets.
*
* A later manual at
*
* https://community.liveaction.com/wp-content/uploads/2020/02/Omnipeek-UserGuide-2-20.pdf
*
* speaks of Aruba and Cisco access points together, mentioning port 5000.
*
* Apparently Aruba supports several protocols, including Peek remote.
* See the packet-aruba-erm dissector.
*
* Tested with frames captured from a Cisco WCS.
*
* Copyright 2007 Joerg Mayer (see AUTHORS file)
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/*
* TODO: Decode meta information.
* Check on fillup bytes in capture (fcs sometimes wrong)
* From:
* http://www.cisco.com/univercd/cc/td/doc/product/wireless/pahcont/oweb.pdf
* "It will include information on timestamp, signal strength, packet size
* and so on"
*/
#define NEW_PROTO_TREE_API
#include "config.h"
#include <wiretap/wtap.h>
#include <epan/packet.h>
#include <epan/expert.h>
#include <wsutil/802_11-utils.h>
#define IS_ARUBA 0x01
#define PEEKREMOTE_PORT 5000 /* Not IANA registered */
void proto_register_peekremote(void);
void proto_reg_handoff_peekremote(void);
static int proto_peekremote;
static dissector_handle_t peekremote_handle;
/*
* XXX - we don't have all the MCS index values here.
* We should probably just show the MCS index as a number (those
* numbers are used in 802.11), and have separate items for the
* number of spatial streams, the modulation type, and the coding rate.
* Note that some modes with more than one spatial stream use *different*
* modulation types for the different streams. See section 20.6
* "Parameters for HT MCSs" in 802.11-2012.
*/
static const value_string peekremote_mcs_index_vals[] = {
{ 0, "Spatial streams: 1, Modulation type: BPSK, Codingrate: 1/2" },
{ 1, "Spatial streams: 1, Modulation type: QPSK, Codingrate: 1/2" },
{ 2, "Spatial streams: 1, Modulation type: QPSK, Codingrate: 3/4" },
{ 3, "Spatial streams: 1, Modulation type: 16-QAM, Codingrate: 1/2" },
{ 4, "Spatial streams: 1, Modulation type: 16-QAM, Codingrate: 3/4" },
{ 5, "Spatial streams: 1, Modulation type: 64-QAM, Codingrate: 2/3" },
{ 6, "Spatial streams: 1, Modulation type: 64-QAM, Codingrate: 3/4" },
{ 7, "Spatial streams: 1, Modulation type: 64-QAM, Codingrate: 5/6" },
{ 8, "Spatial streams: 2, Modulation type: BPSK, Codingrate: 1/2" },
{ 9, "Spatial streams: 2, Modulation type: QPSK, Codingrate: 1/2" },
{ 10, "Spatial streams: 2, Modulation type: QPSK, Codingrate: 3/4" },
{ 11, "Spatial streams: 2, Modulation type: 16-QAM, Codingrate: 1/2" },
{ 12, "Spatial streams: 2, Modulation type: 16-QAM, Codingrate: 3/4" },
{ 13, "Spatial streams: 2, Modulation type: 64-QAM, Codingrate: 2/3" },
{ 14, "Spatial streams: 2, Modulation type: 64-QAM, Codingrate: 3/4" },
{ 15, "Spatial streams: 2, Modulation type: 64-QAM, Codingrate: 5/6" },
{ 16, "Spatial streams: 3, Modulation type: BPSK, Codingrate: 1/2" },
{ 17, "Spatial streams: 3, Modulation type: QPSK, Codingrate: 1/2" },
{ 18, "Spatial streams: 3, Modulation type: QPSK, Codingrate: 3/4" },
{ 19, "Spatial streams: 3, Modulation type: 16-QAM, Codingrate: 1/2" },
{ 20, "Spatial streams: 3, Modulation type: 16-QAM, Codingrate: 3/4" },
{ 21, "Spatial streams: 3, Modulation type: 64-QAM, Codingrate: 2/3" },
{ 22, "Spatial streams: 3, Modulation type: 64-QAM, Codingrate: 3/4" },
{ 23, "Spatial streams: 3, Modulation type: 64-QAM, Codingrate: 5/6" },
{ 24, "Spatial streams: 4, Modulation type: BPSK, Codingrate: 1/2" },
{ 25, "Spatial streams: 4, Modulation type: QPSK, Codingrate: 1/2" },
{ 26, "Spatial streams: 4, Modulation type: QPSK, Codingrate: 3/4" },
{ 27, "Spatial streams: 4, Modulation type: 16-QAM, Codingrate: 1/2" },
{ 28, "Spatial streams: 4, Modulation type: 16-QAM, Codingrate: 3/4" },
{ 29, "Spatial streams: 4, Modulation type: 64-QAM, Codingrate: 2/3" },
{ 30, "Spatial streams: 4, Modulation type: 64-QAM, Codingrate: 3/4" },
{ 31, "Spatial streams: 4, Modulation type: 64-QAM, Codingrate: 5/6" },
{ 0, NULL }
};
static value_string_ext peekremote_mcs_index_vals_ext = VALUE_STRING_EXT_INIT(peekremote_mcs_index_vals);
/* There is no reason to define a separate set of constants for HE(11ax) as it only adds a MCS 10 and 11. MCS0-9 stay the same. We could even imagine an 11ac implementation with MCS10 and 11 (nonstandard)
*/
static const value_string peekremote_mcs_index_vals_ac[] = {
{ 0, "Modulation type: BPSK, Codingrate: 1/2" },
{ 1, "Modulation type: QPSK, Codingrate: 1/2" },
{ 2, "Modulation type: QPSK, Codingrate: 3/4" },
{ 3, "Modulation type: 16-QAM, Codingrate: 1/2" },
{ 4, "Modulation type: 16-QAM, Codingrate: 3/4" },
{ 5, "Modulation type: 64-QAM, Codingrate: 2/3" },
{ 6, "Modulation type: 64-QAM, Codingrate: 3/4" },
{ 7, "Modulation type: 64-QAM, Codingrate: 5/6" },
{ 8, "Modulation type: 256-QAM, Codingrate: 3/4" },
{ 9, "Modulation type: 256-QAM, Codingrate: 5/6" },
{ 10, "Modulation type: 1024-QAM, Codingrate: 3/4" },
{ 11, "Modulation type: 1024-QAM, Codingrate: 5/6" },
{ 0, NULL }
};
static const value_string spatialstreams_vals[] = {
{ 0, "1" },
{ 1, "2" },
{ 2, "3" },
{ 3, "4" },
{ 4, "5" },
{ 5, "6" },
{ 6, "7" },
{ 7, "8" },
{ 0, NULL }
};
static const value_string peekremote_type_vals[] = {
{ 6, "kMediaSpecificHdrType_Wireless3" },
{ 0, NULL }
};
/*
* Extended flags.
*
* Some determined from bug 10637, some determined from bug 9586,
* and the ones present in both agree, so we're assuming that
* the "remote Peek" protocol and the "Peek tagged" file format
* use the same bits (which wouldn't be too surprising, as they
* both come from Wildpackets).
*/
#define EXT_FLAG_20_MHZ_LOWER 0x00000001
#define EXT_FLAG_20_MHZ_UPPER 0x00000002
#define EXT_FLAG_40_MHZ 0x00000004
#define EXT_FLAGS_BANDWIDTH 0x00000007
#define EXT_FLAG_HALF_GI 0x00000008
#define EXT_FLAG_FULL_GI 0x00000010
#define EXT_FLAGS_GI 0x00000018
#define EXT_FLAG_AMPDU 0x00000020
#define EXT_FLAG_AMSDU 0x00000040
#define EXT_FLAG_802_11ac 0x00000080
#define EXT_FLAG_MCS_INDEX_USED 0x00000100
#define EXT_FLAG_80MHZ 0x00000200
#define EXT_FLAG_SHORTPREAMBLE 0x00000400
#define EXT_FLAG_SPATIALSTREAMS 0x0001C000
#define EXT_FLAG_HEFLAG 0x00020000
#define EXT_FLAG_160MHZ 0x00040000
#define EXT_FLAGS_RESERVED 0xFFFC0000
/* hfi elements */
#define THIS_HF_INIT HFI_INIT(proto_peekremote)
static header_field_info *hfi_peekremote = NULL;
/* Common to both headers */
static header_field_info hfi_peekremote_channel THIS_HF_INIT =
{ "Channel", "peekremote.channel", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_signal_dbm THIS_HF_INIT =
{ "Signal [dBm]", "peekremote.signal_dbm", FT_INT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_noise_dbm THIS_HF_INIT =
{ "Noise [dBm]", "peekremote.noise_dbm", FT_INT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_packetlength THIS_HF_INIT =
{ "Packet length", "peekremote.packetlength", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_slicelength THIS_HF_INIT =
{ "Slice length", "peekremote.slicelength", FT_UINT16, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_flags THIS_HF_INIT =
{ "Flags", "peekremote.flags", FT_UINT8, BASE_HEX, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_flags_control_frame THIS_HF_INIT =
{ "Is a Control frame", "peekremote.flags.control_frame", FT_BOOLEAN, 8, TFS(&tfs_yes_no),
0x01, NULL, HFILL };
static header_field_info hfi_peekremote_flags_crc_error THIS_HF_INIT =
{ "Has CRC error", "peekremote.flags.has_crc_error", FT_BOOLEAN, 8, TFS(&tfs_yes_no),
0x02, NULL, HFILL };
static header_field_info hfi_peekremote_flags_frame_error THIS_HF_INIT =
{ "Has frame error", "peekremote.flags.has_frame_error", FT_BOOLEAN, 8, TFS(&tfs_yes_no),
0x04, NULL, HFILL };
static header_field_info hfi_peekremote_flags_reserved THIS_HF_INIT =
{ "Reserved", "peekremote.flags.reserved", FT_UINT8, BASE_HEX, NULL,
0xF8, "Must be zero", HFILL };
static header_field_info hfi_peekremote_status THIS_HF_INIT =
{ "Status", "peekremote.status", FT_UINT8, BASE_HEX, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_status_protected THIS_HF_INIT =
{ "Protected", "peekremote.status.protected", FT_BOOLEAN, 8, TFS(&tfs_yes_no),
0x04, NULL, HFILL };
static header_field_info hfi_peekremote_status_with_decrypt_error THIS_HF_INIT =
{ "With decrypt error", "peekremote.status.with_decrypt_error", FT_BOOLEAN, 8, TFS(&tfs_yes_no),
0x08, NULL, HFILL };
static header_field_info hfi_peekremote_status_with_short_preamble THIS_HF_INIT =
{ "With short preamble", "peekremote.status.with_short_preamble", FT_BOOLEAN, 8, TFS(&tfs_yes_no),
0x40, NULL, HFILL };
static header_field_info hfi_peekremote_status_reserved THIS_HF_INIT =
{ "Reserved", "peekremote.status.reserved", FT_UINT8, BASE_HEX, NULL,
0xB3, "Must be zero", HFILL };
static header_field_info hfi_peekremote_timestamp THIS_HF_INIT =
{ "TSF timestamp", "peekremote.timestamp", FT_UINT64, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_mcs_index THIS_HF_INIT =
{ "MCS index", "peekremote.mcs_index", FT_UINT16, BASE_DEC|BASE_EXT_STRING, &peekremote_mcs_index_vals_ext,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_mcs_index_ac THIS_HF_INIT =
{ "11ac/11ax MCS index", "peekremote.mcs_index_ac", FT_UINT16, BASE_DEC, VALS(peekremote_mcs_index_vals_ac),
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_signal_percent THIS_HF_INIT =
{ "Signal [percent]", "peekremote.signal_percent", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_noise_percent THIS_HF_INIT =
{ "Noise [percent]", "peekremote.noise_percent", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
/* Legacy header only */
static header_field_info hfi_peekremote_speed THIS_HF_INIT =
{ "Data rate [500kHz]", "peekremote.data_rate", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
/* New header only */
static header_field_info hfi_peekremote_magic_number THIS_HF_INIT =
{ "Magic number", "peekremote.magic_number", FT_UINT32, BASE_HEX, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_header_version THIS_HF_INIT =
{ "Header version", "peekremote.header_version", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_header_size THIS_HF_INIT =
{ "Header size", "peekremote.header_size", FT_UINT32, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_type THIS_HF_INIT =
{ "Type", "peekremote.type", FT_UINT32, BASE_DEC, VALS(peekremote_type_vals),
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_frequency THIS_HF_INIT =
{ "Frequency [Mhz]", "peekremote.frequency", FT_UINT32, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_band THIS_HF_INIT =
{ "Band", "peekremote.band", FT_UINT32, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_extflags THIS_HF_INIT =
{ "Extended flags", "peekremote.extflags", FT_UINT32, BASE_HEX, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_20mhz_lower THIS_HF_INIT =
{ "20 MHz Lower", "peekremote.extflags.20mhz_lower", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_20_MHZ_LOWER, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_20mhz_upper THIS_HF_INIT =
{ "20 MHz Upper", "peekremote.extflags.20mhz_upper", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_20_MHZ_UPPER, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_40mhz THIS_HF_INIT =
{ "40 MHz", "peekremote.extflags.40mhz", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_40_MHZ, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_half_gi THIS_HF_INIT =
{ "Half Guard Interval", "peekremote.extflags.half_gi", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_HALF_GI, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_full_gi THIS_HF_INIT =
{ "Full Guard Interval", "peekremote.extflags.full_gi", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_FULL_GI, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_ampdu THIS_HF_INIT =
{ "AMPDU", "peekremote.extflags.ampdu", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_AMPDU, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_amsdu THIS_HF_INIT =
{ "AMSDU", "peekremote.extflags.amsdu", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_AMSDU, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_11ac THIS_HF_INIT =
{ "802.11ac", "peekremote.extflags.11ac", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_802_11ac, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_future_use THIS_HF_INIT =
{ "MCS index used", "peekremote.extflags.future_use", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_MCS_INDEX_USED, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_80mhz THIS_HF_INIT =
{ "80 Mhz", "peekremote.extflags.80mhz", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_80MHZ, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_shortpreamble THIS_HF_INIT =
{ "Short preamble", "peekremote.extflags.shortpreamble", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_SHORTPREAMBLE, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_spatialstreams THIS_HF_INIT =
{ "Spatial streams", "peekremote.extflags.spatialstreams", FT_UINT32, BASE_DEC, VALS(spatialstreams_vals),
EXT_FLAG_SPATIALSTREAMS, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_heflag THIS_HF_INIT =
{ "802.11ax", "peekremote.extflags.11ax", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_HEFLAG, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_160mhz THIS_HF_INIT =
{ "160Mhz", "peekremote.extflags.160mhz", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
EXT_FLAG_160MHZ, NULL, HFILL };
static header_field_info hfi_peekremote_extflags_reserved THIS_HF_INIT =
{ "Reserved", "peekremote.extflags.reserved", FT_UINT32, BASE_HEX, NULL,
EXT_FLAGS_RESERVED, "Must be zero", HFILL };
/* XXX - are the numbers antenna numbers? */
static header_field_info hfi_peekremote_signal_1_dbm THIS_HF_INIT =
{ "Signal 1 [dBm]", "peekremote.signal_1_dbm", FT_INT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_signal_2_dbm THIS_HF_INIT =
{ "Signal 2 [dBm]", "peekremote.signal_2_dbm", FT_INT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_signal_3_dbm THIS_HF_INIT =
{ "Signal 3 [dBm]", "peekremote.signal_3_dbm", FT_INT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_signal_4_dbm THIS_HF_INIT =
{ "Signal 4 [dBm]", "peekremote.signal_4_dbm", FT_INT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_noise_1_dbm THIS_HF_INIT =
{ "Noise 1 [dBm]", "peekremote.noise_1_dbm", FT_INT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_noise_2_dbm THIS_HF_INIT =
{ "Noise 2 [dBm]", "peekremote.noise_2_dbm", FT_INT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_noise_3_dbm THIS_HF_INIT =
{ "Noise 3 [dBm]", "peekremote.noise_3_dbm", FT_INT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static header_field_info hfi_peekremote_noise_4_dbm THIS_HF_INIT =
{ "Noise 4 [dBm]", "peekremote.noise_4_dbm", FT_INT8, BASE_DEC, NULL,
0x0, NULL, HFILL };
static expert_field ei_peekremote_unknown_header_version = EI_INIT;
static expert_field ei_peekremote_invalid_header_size = EI_INIT;
static gint ett_peekremote = -1;
static gint ett_peekremote_flags = -1;
static gint ett_peekremote_status = -1;
static gint ett_peekremote_extflags = -1;
static dissector_handle_t wlan_radio_handle;
static int
dissect_peekremote_extflags(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int offset)
{
proto_tree *extflags_tree;
proto_item *ti_extflags;
ti_extflags = proto_tree_add_item(tree, &hfi_peekremote_extflags, tvb, offset, 4, ENC_BIG_ENDIAN);
extflags_tree = proto_item_add_subtree(ti_extflags, ett_peekremote_extflags);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_20mhz_lower, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_20mhz_upper, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_40mhz, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_half_gi, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_full_gi, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_ampdu, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_amsdu, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_11ac, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_future_use, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_80mhz, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_shortpreamble, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_spatialstreams, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_heflag, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_160mhz, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(extflags_tree, &hfi_peekremote_extflags_reserved, tvb, offset, 4, ENC_BIG_ENDIAN);
return 4;
}
static int
dissect_peekremote_flags(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int offset)
{
proto_tree *flags_tree;
proto_item *ti_flags;
ti_flags = proto_tree_add_item(tree, &hfi_peekremote_flags, tvb, offset, 1, ENC_NA);
flags_tree = proto_item_add_subtree(ti_flags, ett_peekremote_flags);
proto_tree_add_item(flags_tree, &hfi_peekremote_flags_control_frame, tvb, offset, 1, ENC_NA);
proto_tree_add_item(flags_tree, &hfi_peekremote_flags_crc_error, tvb, offset, 1, ENC_NA);
proto_tree_add_item(flags_tree, &hfi_peekremote_flags_frame_error, tvb, offset, 1, ENC_NA);
proto_tree_add_item(flags_tree, &hfi_peekremote_flags_reserved, tvb, offset, 1, ENC_NA);
return 1;
}
static int
dissect_peekremote_status(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int offset)
{
proto_tree *status_tree;
proto_item *ti_status;
ti_status = proto_tree_add_item(tree, &hfi_peekremote_status, tvb, offset, 1, ENC_NA);
status_tree = proto_item_add_subtree(ti_status, ett_peekremote_status);
proto_tree_add_item(status_tree, &hfi_peekremote_status_protected, tvb, offset, 1, ENC_NA);
proto_tree_add_item(status_tree, &hfi_peekremote_status_with_decrypt_error, tvb, offset, 1, ENC_NA);
proto_tree_add_item(status_tree, &hfi_peekremote_status_with_short_preamble, tvb, offset, 1, ENC_NA);
proto_tree_add_item(status_tree, &hfi_peekremote_status_reserved, tvb, offset, 1, ENC_NA);
return 1;
}
static gboolean
dissect_peekremote_new(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *u _U_)
{
static const guint8 magic[4] = { 0x00, 0xFF, 0xAB, 0xCD };
int offset = 0;
proto_tree *peekremote_tree = NULL;
proto_item *ti = NULL;
proto_item *ti_header_version, *ti_header_size;
guint8 header_version;
gint header_size;
struct ieee_802_11_phdr phdr;
guint32 extflags;
guint16 frequency;
guint16 mcs_index;
tvbuff_t *next_tvb;
if (tvb_memeql(tvb, 0, magic, 4) == -1) {
/*
* Not big enough to hold the magic number, or doesn't start
* with the magic number.
*/
return FALSE;
}
/* We don't have any 802.11 metadata yet. */
memset(&phdr, 0, sizeof(phdr));
phdr.fcs_len = 4; /* has an FCS */
phdr.decrypted = FALSE;
phdr.datapad = FALSE;
phdr.phy = PHDR_802_11_PHY_UNKNOWN;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "PEEKREMOTE");
col_clear(pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item(tree, hfi_peekremote, tvb, 0, -1, ENC_NA);
peekremote_tree = proto_item_add_subtree(ti, ett_peekremote);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_magic_number, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
header_version = tvb_get_guint8(tvb, offset);
ti_header_version = proto_tree_add_uint(peekremote_tree, &hfi_peekremote_header_version, tvb, offset, 1, header_version);
offset += 1;
header_size = tvb_get_ntohl(tvb, offset);
ti_header_size = proto_tree_add_uint(peekremote_tree, &hfi_peekremote_header_size, tvb, offset, 4, header_size);
offset += 4;
switch (header_version) {
case 2:
if (header_size != 55) {
expert_add_info(pinfo, ti_header_size, &ei_peekremote_invalid_header_size);
if (header_size > 9)
offset += (header_size - 9);
} else {
proto_tree_add_item(peekremote_tree, &hfi_peekremote_type, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
mcs_index = tvb_get_ntohs(tvb, offset);
extflags = tvb_get_ntohl(tvb, offset+12);
if (extflags & EXT_FLAG_HEFLAG) {
proto_tree_add_item(peekremote_tree, &hfi_peekremote_mcs_index_ac, tvb, offset, 2, ENC_BIG_ENDIAN);
phdr.phy = PHDR_802_11_PHY_11AX;
} else {
if (extflags & EXT_FLAG_802_11ac) {
proto_tree_add_item(peekremote_tree, &hfi_peekremote_mcs_index_ac, tvb, offset, 2, ENC_BIG_ENDIAN);
phdr.phy = PHDR_802_11_PHY_11AC;
} else {
proto_tree_add_item(peekremote_tree, &hfi_peekremote_mcs_index, tvb, offset, 2, ENC_BIG_ENDIAN);
phdr.phy = PHDR_802_11_PHY_11N;
phdr.phy_info.info_11n.has_mcs_index = TRUE;
phdr.phy_info.info_11n.mcs_index = mcs_index;
}
}
offset += 2;
phdr.has_channel = TRUE;
phdr.channel = tvb_get_ntohs(tvb, offset);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_channel, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
frequency = tvb_get_ntohl(tvb, offset);
if (frequency != 0) {
phdr.has_frequency = TRUE;
phdr.frequency = frequency;
}
proto_tree_add_item(peekremote_tree, &hfi_peekremote_frequency, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_band, tvb, offset, 4, ENC_BIG_ENDIAN);
offset +=4;
offset += dissect_peekremote_extflags(tvb, pinfo, peekremote_tree, offset);
phdr.has_signal_percent = TRUE;
phdr.signal_percent = tvb_get_guint8(tvb, offset);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_signal_percent, tvb, offset, 1, ENC_NA);
offset += 1;
phdr.has_noise_percent = TRUE;
phdr.noise_percent = tvb_get_guint8(tvb, offset);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_noise_percent, tvb, offset, 1, ENC_NA);
offset += 1;
phdr.has_signal_dbm = TRUE;
phdr.signal_dbm = tvb_get_guint8(tvb, offset);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_signal_dbm, tvb, offset, 1, ENC_NA);
offset += 1;
phdr.has_noise_dbm = TRUE;
phdr.noise_dbm = tvb_get_guint8(tvb, offset);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_noise_dbm, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_signal_1_dbm, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_signal_2_dbm, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_signal_3_dbm, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_signal_4_dbm, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_noise_1_dbm, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_noise_2_dbm, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_noise_3_dbm, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_noise_4_dbm, tvb, offset, 1, ENC_NA);
offset += 1;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_packetlength, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(peekremote_tree, &hfi_peekremote_slicelength, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
offset += dissect_peekremote_flags(tvb, pinfo, peekremote_tree, offset);
offset += dissect_peekremote_status(tvb, pinfo, peekremote_tree, offset);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_timestamp, tvb, offset, 8, ENC_BIG_ENDIAN);
phdr.has_tsf_timestamp = TRUE;
phdr.tsf_timestamp = tvb_get_ntoh64(tvb, offset);
offset += 8;
}
break;
default:
expert_add_info(pinfo, ti_header_version, &ei_peekremote_unknown_header_version);
if (header_size > 9)
offset += (header_size - 9);
break;
}
proto_item_set_end(ti, tvb, offset);
next_tvb = tvb_new_subset_remaining(tvb, offset);
call_dissector_with_data(wlan_radio_handle, next_tvb, pinfo, tree, &phdr);
return TRUE;
}
static int
dissect_peekremote_legacy(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
tvbuff_t *next_tvb;
proto_tree *peekremote_tree = NULL;
proto_item *ti = NULL;
struct ieee_802_11_phdr phdr;
guint8 signal_percent;
memset(&phdr, 0, sizeof(phdr));
/*
* Check whether this is peekremote-ng, and dissect it as such if it
* is.
*/
if (dissect_peekremote_new(tvb, pinfo, tree, data)) {
/* Yup, it was peekremote-ng, and it's been dissected as such. */
return tvb_reported_length(tvb);
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "PEEKREMOTE");
col_clear(pinfo->cinfo, COL_INFO);
if (tree) {
ti = proto_tree_add_item(tree, hfi_peekremote, tvb, 0, -1, ENC_NA);
peekremote_tree = proto_item_add_subtree(ti, ett_peekremote);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_signal_dbm, tvb, 0, 1, ENC_NA);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_noise_dbm, tvb, 1, 1, ENC_NA);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_packetlength, tvb, 2, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_slicelength, tvb, 4, 2, ENC_BIG_ENDIAN);
dissect_peekremote_flags(tvb, pinfo, peekremote_tree, 6);
dissect_peekremote_status(tvb, pinfo, peekremote_tree, 7);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_timestamp, tvb, 8, 8, ENC_BIG_ENDIAN);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_speed, tvb, 16, 1, ENC_NA);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_channel, tvb, 17, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_signal_percent, tvb, 18, 1, ENC_NA);
proto_tree_add_item(peekremote_tree, &hfi_peekremote_noise_percent, tvb, 19, 1, ENC_NA);
}
signal_percent = tvb_get_guint8(tvb, 18);
proto_item_set_end(ti, tvb, 20);
next_tvb = tvb_new_subset_remaining(tvb, 20);
/* When signal = 100 % and coming from ARUBA ERM, it is TX packet and there is no FCS */
if (GPOINTER_TO_INT(data) == IS_ARUBA && signal_percent == 100) {
phdr.fcs_len = 0; /* TX packet, no FCS */
} else {
phdr.fcs_len = 4; /* We have an FCS */
}
phdr.decrypted = FALSE;
phdr.phy = PHDR_802_11_PHY_UNKNOWN;
phdr.has_channel = TRUE;
phdr.channel = tvb_get_guint8(tvb, 17);
phdr.has_data_rate = TRUE;
phdr.data_rate = tvb_get_guint8(tvb, 16);
phdr.has_signal_percent = TRUE;
phdr.signal_percent = tvb_get_guint8(tvb, 18);
phdr.has_noise_percent = TRUE;
phdr.noise_percent = tvb_get_guint8(tvb, 18);
phdr.has_signal_dbm = TRUE;
phdr.signal_dbm = tvb_get_guint8(tvb, 0);
phdr.has_noise_dbm = TRUE;
phdr.noise_dbm = tvb_get_guint8(tvb, 1);
phdr.has_tsf_timestamp = TRUE;
phdr.tsf_timestamp = tvb_get_ntoh64(tvb, 8);
/*
* We don't know they PHY, but we do have the data rate;
* try to guess the PHY based on the data rate and channel.
*/
if (RATE_IS_DSSS(phdr.data_rate)) {
/* 11b */
phdr.phy = PHDR_802_11_PHY_11B;
phdr.phy_info.info_11b.has_short_preamble = FALSE;
} else if (RATE_IS_OFDM(phdr.data_rate)) {
/* 11a or 11g, depending on the band. */
if (CHAN_IS_BG(phdr.channel)) {
/* 11g */
phdr.phy = PHDR_802_11_PHY_11G;
phdr.phy_info.info_11g.has_mode = FALSE;
} else {
/* 11a */
phdr.phy = PHDR_802_11_PHY_11A;
phdr.phy_info.info_11a.has_channel_type = FALSE;
phdr.phy_info.info_11a.has_turbo_type = FALSE;
}
}
return 20 + call_dissector_with_data(wlan_radio_handle, next_tvb, pinfo, tree, &phdr);
}
void
proto_register_peekremote(void)
{
#ifndef HAVE_HFI_SECTION_INIT
static header_field_info *hfi[] = {
&hfi_peekremote_signal_dbm,
&hfi_peekremote_noise_dbm,
&hfi_peekremote_packetlength,
&hfi_peekremote_slicelength,
&hfi_peekremote_flags,
&hfi_peekremote_flags_control_frame,
&hfi_peekremote_flags_crc_error,
&hfi_peekremote_flags_frame_error,
&hfi_peekremote_flags_reserved,
&hfi_peekremote_status,
&hfi_peekremote_status_protected,
&hfi_peekremote_status_with_decrypt_error,
&hfi_peekremote_status_with_short_preamble,
&hfi_peekremote_status_reserved,
&hfi_peekremote_timestamp,
&hfi_peekremote_speed,
&hfi_peekremote_channel,
&hfi_peekremote_magic_number,
&hfi_peekremote_header_version,
&hfi_peekremote_header_size,
&hfi_peekremote_type,
&hfi_peekremote_mcs_index,
&hfi_peekremote_mcs_index_ac,
&hfi_peekremote_signal_percent,
&hfi_peekremote_noise_percent,
&hfi_peekremote_frequency,
&hfi_peekremote_band,
&hfi_peekremote_extflags,
&hfi_peekremote_extflags_20mhz_lower,
&hfi_peekremote_extflags_20mhz_upper,
&hfi_peekremote_extflags_40mhz,
&hfi_peekremote_extflags_half_gi,
&hfi_peekremote_extflags_full_gi,
&hfi_peekremote_extflags_ampdu,
&hfi_peekremote_extflags_amsdu,
&hfi_peekremote_extflags_11ac,
&hfi_peekremote_extflags_future_use,
&hfi_peekremote_extflags_80mhz,
&hfi_peekremote_extflags_shortpreamble,
&hfi_peekremote_extflags_spatialstreams,
&hfi_peekremote_extflags_heflag,
&hfi_peekremote_extflags_160mhz,
&hfi_peekremote_extflags_reserved,
&hfi_peekremote_signal_1_dbm,
&hfi_peekremote_signal_2_dbm,
&hfi_peekremote_signal_3_dbm,
&hfi_peekremote_signal_4_dbm,
&hfi_peekremote_noise_1_dbm,
&hfi_peekremote_noise_2_dbm,
&hfi_peekremote_noise_3_dbm,
&hfi_peekremote_noise_4_dbm,
};
#endif
static gint *ett[] = {
&ett_peekremote,
&ett_peekremote_flags,
&ett_peekremote_status,
&ett_peekremote_extflags
};
static ei_register_info ei[] = {
{ &ei_peekremote_unknown_header_version, { "peekremote.unknown_header_version", PI_UNDECODED, PI_ERROR, "Unknown header version", EXPFILL }},
{ &ei_peekremote_invalid_header_size, { "peekremote.invalid_header_size", PI_UNDECODED, PI_ERROR, "Invalid header size for that header version", EXPFILL }},
};
expert_module_t *expert_peekremote;
proto_peekremote = proto_register_protocol(
"AiroPeek/OmniPeek encapsulated IEEE 802.11", "PEEKREMOTE", "peekremote");
hfi_peekremote = proto_registrar_get_nth(proto_peekremote);
proto_register_fields(proto_peekremote, hfi, array_length(hfi));
proto_register_subtree_array(ett, array_length(ett));
expert_peekremote = expert_register_protocol(proto_peekremote);
expert_register_field_array(expert_peekremote, ei, array_length(ei));
peekremote_handle = register_dissector("peekremote", dissect_peekremote_legacy, proto_peekremote);
}
void
proto_reg_handoff_peekremote(void)
{
wlan_radio_handle = find_dissector_add_dependency("wlan_radio", proto_peekremote);
dissector_add_uint_with_preference("udp.port", PEEKREMOTE_PORT, peekremote_handle);
heur_dissector_add("udp", dissect_peekremote_new, "OmniPeek Remote over UDP", "peekremote_udp", proto_peekremote, HEURISTIC_ENABLE);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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