forked from osmocom/wireshark
176 lines
6.3 KiB
C
176 lines
6.3 KiB
C
/* packet-peekremote.c
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*
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* Routines for the disassembly of packets sent from Cisco WLAN
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* Controllers, possibly other Cisco access points, and possibly
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* other devices such as Aruba access points. See
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*
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* http://www.wildpackets.com/elements/omnipeek/OmniPeek_UserGuide.pdf
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*
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* which speaks of Aruba access points supporting remote capture and
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* defaulting to port 5000 for this, and also speaks of Cisco access
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* points supporting remote capture without any reference to a port
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* number. The two types of remote capture are described separately;
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* there's no indication of whether they use the same protocol for
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* streaming packets but perhaps other protocols for, for example,
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* discovery and setup, or whether they use different protocols
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* for streaming packets.
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*
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* Tested with frames captured from a Cisco WCS.
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*
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* $Id$
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*
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* Copyright 2007 Joerg Mayer (see AUTHORS file)
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* TODO: Decode meta information.
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* Check on fillup bytes in capture (fcs sometimes wrong)
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* From:
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* http://www.cisco.com/univercd/cc/td/doc/product/wireless/pahcont/oweb.pdf
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* "It will include information on timestamp, signal strength, packet size
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* and so on"
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*/
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#define NEW_PROTO_TREE_API
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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#include <wiretap/wtap.h>
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void proto_register_peekremote(void);
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void proto_reg_handoff_peekremote(void);
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/* hfi elements */
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#define THIS_HF_INIT HFI_INIT(proto_peekremote)
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static header_field_info *hfi_peekremote = NULL;
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static header_field_info hfi_peekremote_signal THIS_HF_INIT =
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{ "Signal [dBm]", "peekremote.signal", FT_INT8, BASE_DEC, NULL,
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0x0, NULL, HFILL };
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static header_field_info hfi_peekremote_noise THIS_HF_INIT =
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{ "Noise [dBm]", "peekremote.noise", FT_INT8, BASE_DEC, NULL,
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0x0, NULL, HFILL };
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static header_field_info hfi_peekremote_packetlength THIS_HF_INIT =
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{ "Packet length", "peekremote.packetlength", FT_UINT16, BASE_DEC, NULL,
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0x0, NULL, HFILL };
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static header_field_info hfi_peekremote_slicelength THIS_HF_INIT =
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{ "Slice length", "peekremote.slicelength", FT_UINT16, BASE_DEC, NULL,
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0x0, NULL, HFILL };
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static header_field_info hfi_peekremote_unknown4 THIS_HF_INIT =
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{ "Unknown4", "peekremote.unknown4", FT_BYTES, BASE_NONE, NULL,
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0x0, NULL, HFILL };
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static header_field_info hfi_peekremote_speed THIS_HF_INIT =
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{ "Speed [500kHz]", "peekremote.speed", FT_UINT8, BASE_DEC, NULL,
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0x0, NULL, HFILL };
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static header_field_info hfi_peekremote_unknown6 THIS_HF_INIT =
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{ "Unknown6", "peekremote.unknown6", FT_BYTES, BASE_NONE, NULL,
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0x0, NULL, HFILL };
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static header_field_info hfi_peekremote_channel THIS_HF_INIT =
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{ "Channel", "peekremote.channel", FT_UINT8, BASE_DEC, NULL,
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0x0, NULL, HFILL };
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static header_field_info hfi_peekremote_timestamp THIS_HF_INIT =
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{ "Timestamp?", "peekremote.timestamp", FT_UINT32, BASE_DEC, NULL,
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0x0, NULL, HFILL };
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static gint ett_peekremote = -1;
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static dissector_handle_t peekremote_handle;
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static dissector_handle_t ieee80211_handle;
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static int
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dissect_peekremote(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *u _U_)
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{
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tvbuff_t *next_tvb;
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proto_tree *peekremote_tree = NULL;
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proto_item *ti = NULL;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "AIROPEEK");
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col_clear(pinfo->cinfo, COL_INFO);
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if (tree) {
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ti = proto_tree_add_item(tree, hfi_peekremote, tvb, 0, -1, ENC_NA);
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peekremote_tree = proto_item_add_subtree(ti, ett_peekremote);
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proto_tree_add_item(peekremote_tree, &hfi_peekremote_signal, tvb, 0, 1, ENC_NA);
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proto_tree_add_item(peekremote_tree, &hfi_peekremote_noise, tvb, 1, 1, ENC_NA);
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proto_tree_add_item(peekremote_tree, &hfi_peekremote_packetlength, tvb, 2, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(peekremote_tree, &hfi_peekremote_slicelength, tvb, 4, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(peekremote_tree, &hfi_peekremote_unknown4, tvb, 6, 6, ENC_NA);
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proto_tree_add_item(peekremote_tree, &hfi_peekremote_timestamp, tvb, 12, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(peekremote_tree, &hfi_peekremote_speed, tvb, 16, 1, ENC_NA);
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proto_tree_add_item(peekremote_tree, &hfi_peekremote_channel, tvb, 17, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(peekremote_tree, &hfi_peekremote_unknown6, tvb, 18, 2, ENC_NA);
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}
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next_tvb = tvb_new_subset_remaining(tvb, 20);
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pinfo->pseudo_header->ieee_802_11.fcs_len = 4;
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return 20 + call_dissector(ieee80211_handle, next_tvb, pinfo, tree);
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}
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void
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proto_register_peekremote(void)
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{
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#ifndef HAVE_HFI_SECTION_INIT
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static hfi_register_info *hfi[] = {
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&hfi_peekremote_signal,
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&hfi_peekremote_noise,
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&hfi_peekremote_packetlength,
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&hfi_peekremote_slicelength,
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&hfi_peekremote_unknown4,
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&hfi_peekremote_speed,
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&hfi_peekremote_unknown6,
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&hfi_peekremote_timestamp,
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&hfi_peekremote_channel,
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};
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#endif
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static gint *ett[] = {
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&ett_peekremote,
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};
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int proto_peekremote;
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proto_peekremote = proto_register_protocol(
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"AiroPeek/OmniPeek encapsulated IEEE 802.11", "PEEKREMOTE", "peekremote");
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hfi_peekremote = proto_registrar_get_nth(proto_peekremote);
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proto_register_fields(proto_peekremote, hfi, array_length(hfi));
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proto_register_subtree_array(ett, array_length(ett));
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peekremote_handle = new_create_dissector_handle(dissect_peekremote, proto_peekremote);
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}
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void
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proto_reg_handoff_peekremote(void)
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{
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ieee80211_handle = find_dissector("wlan_datapad");
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dissector_add_uint("udp.port", 5000, peekremote_handle);
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}
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