forked from osmocom/wireshark
![Simon Barber](/assets/img/avatar_default.png)
The use of a flag field here is aesthetically unpleasing when the flags are referred to frequently. Convert these into bitfield entries. Change-Id: I6f47e31558439dfd343ec7f856d04480366a1237 Reviewed-on: https://code.wireshark.org/review/12511 Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Guy Harris <guy@alum.mit.edu>
520 lines
18 KiB
C
520 lines
18 KiB
C
/* packet-aruba-erm.c
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* Routines for the disassembly of Aruba encapsulated remote mirroring frames
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* (Adapted from packet-hp-erm.c and packet-cisco-erspan.c)
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*
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* Copyright 2010 Alexis La Goutte <alexis.lagoutte at gmail dot com>
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*
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* ERM Radio-Format added by Hadriel Kaplan
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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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* See
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*
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* http://community.arubanetworks.com/t5/Unified-Wired-Wireless-Access/Bug-in-ArubaOS-Packet-Capture/td-p/237984
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*
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* http://kjspgd.net/?p=30
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*
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* for more information.
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*/
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/*
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* Formats:
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*
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* Pcap (type 0):
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*
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* Payload contains a pcap record header:
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*
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* typedef struct pcaprec_hdr_s {
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* guint32 ts_sec; timestamp seconds
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* guint32 ts_usec; timestamp microseconds
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* guint32 incl_len; number of octets of packet saved in file
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* guint32 orig_len; actual length of packet
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* } pcaprec_hdr_t;
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*
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* followed by the packet data, starting with an 802.11 header.
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*
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* Peek (type 1):
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*
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* Payload contains a "Peek remote" packet, as supported by
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* EtherPeek/AiroPeek/OmniPeek.
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*
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* Airmagnet (type 2):
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*
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* Unknown payload format.
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*
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* Pcap + radio header (type 3):
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*
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* Payload contains a pcap record header, as per the above, followed
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* by a header with radio information:
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*
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* struct radio_hdr {
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* __u16 rate_per_half_mhz;
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* __u8 channel;
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* __u8 signal_percent;
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* } __attribute__ ((packed));
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*
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* followed by the packet data, starting with an 802.11 header.
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*
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* PPI (type 4):
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*
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* Payload contains a PPI header followed by the packet data, starting
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* with an 802.11 header.
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*
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* Peek 11n/11ac (type 5):
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*
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* This is probably the "new" "Peek remote" format. The "Peek remote"
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* dissector should probably be able to distinguish this from type 1,
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* as the "new" format has a magic number in it. Given that there's
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* a heuristic "Peek remote new" dissector, those packets might
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* automatically be recognized without setting any preference whatsoever.
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*/
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#include "config.h"
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#include <wiretap/wtap.h>
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#include <epan/packet.h>
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#include <epan/expert.h>
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#include <epan/prefs.h>
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#include <epan/decode_as.h>
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#define PROTO_SHORT_NAME "ARUBA_ERM"
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#define PROTO_LONG_NAME "Aruba Networks encapsulated remote mirroring"
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#define TYPE_PCAP 0
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#define TYPE_PEEK 1
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#define TYPE_AIRMAGNET 2
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#define TYPE_PCAPPLUSRADIO 3
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#define TYPE_PPI 4
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#define IS_ARUBA 0x01
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#if 0
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static const value_string aruba_erm_type_vals[] = {
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{ TYPE_PCAP, "pcap (type 0)" },
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{ TYPE_PEEK, "peek (type 1)" },
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{ TYPE_AIRMAGNET, "Airmagnet (type 2)" },
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{ TYPE_PCAPPLUSRADIO, "pcap + radio header (type 3)" },
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{ TYPE_PPI, "PPI (type 4)" },
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{ 0, NULL }
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};
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#endif
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void proto_register_aruba_erm(void);
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void proto_reg_handoff_aruba_erm(void);
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void proto_reg_handoff_aruba_erm_radio(void);
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static range_t *global_aruba_erm_port_range;
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#if 0
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static gint aruba_erm_type = 0;
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#endif
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static int proto_aruba_erm = -1;
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static int proto_aruba_erm_type0 = -1;
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static int proto_aruba_erm_type1 = -1;
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static int proto_aruba_erm_type2 = -1;
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static int proto_aruba_erm_type3 = -1;
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static int proto_aruba_erm_type4 = -1;
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static int proto_aruba_erm_type5 = -1;
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static int hf_aruba_erm_time = -1;
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static int hf_aruba_erm_incl_len = -1;
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static int hf_aruba_erm_orig_len = -1;
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static int hf_aruba_erm_data_rate = -1;
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static int hf_aruba_erm_data_rate_gen = -1;
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static int hf_aruba_erm_channel = -1;
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static int hf_aruba_erm_signal_strength = -1;
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static gint ett_aruba_erm = -1;
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static expert_field ei_aruba_erm_airmagnet = EI_INIT;
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static expert_field ei_aruba_erm_decode = EI_INIT;
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static dissector_handle_t aruba_erm_handle;
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static dissector_handle_t aruba_erm_handle_type0;
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static dissector_handle_t aruba_erm_handle_type1;
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static dissector_handle_t aruba_erm_handle_type2;
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static dissector_handle_t aruba_erm_handle_type3;
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static dissector_handle_t aruba_erm_handle_type4;
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static dissector_handle_t aruba_erm_handle_type5;
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static dissector_handle_t wlan_radio_handle;
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static dissector_handle_t wlan_withfcs_handle;
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static dissector_handle_t peek_handle;
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static dissector_handle_t ppi_handle;
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static dissector_handle_t data_handle;
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static dissector_table_t aruba_erm_subdissector_table;
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static int
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dissect_aruba_erm_pcap(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *aruba_erm_tree, gint offset)
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{
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nstime_t ts;
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ts.secs = tvb_get_ntohl(tvb, 0);
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ts.nsecs = tvb_get_ntohl(tvb,4)*1000;
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proto_tree_add_time(aruba_erm_tree, hf_aruba_erm_time, tvb, offset, 8,&ts);
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offset +=8;
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proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_incl_len, tvb, 8, 4, ENC_BIG_ENDIAN);
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offset +=4;
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proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_orig_len, tvb, 12, 4, ENC_BIG_ENDIAN);
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offset +=4;
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return offset;
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}
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static proto_tree *
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dissect_aruba_erm_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int *offset _U_)
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{
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proto_item *ti;
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proto_tree *aruba_erm_tree;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
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col_set_str(pinfo->cinfo, COL_INFO, PROTO_SHORT_NAME);
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ti = proto_tree_add_item(tree, proto_aruba_erm, tvb, 0, 0, ENC_NA);
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aruba_erm_tree = proto_item_add_subtree(ti, ett_aruba_erm);
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return aruba_erm_tree;
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}
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static int
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dissect_aruba_erm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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int offset = 0;
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/*
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* Implement "Decode As", as Aruba ERM doesn't
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* have a unique identifier to determine subdissector
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*/
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if (!dissector_try_uint(aruba_erm_subdissector_table, 0, tvb, pinfo, tree)) {
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dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
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/* Add Expert info how decode...*/
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proto_tree_add_expert(tree, pinfo, &ei_aruba_erm_decode, tvb, offset, -1);
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call_dissector(data_handle, tvb, pinfo, tree);
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}
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return tvb_captured_length(tvb);
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}
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static int
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dissect_aruba_erm_type0(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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tvbuff_t * next_tvb;
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int offset = 0;
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proto_tree *aruba_erm_tree;
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aruba_erm_tree = dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
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offset = dissect_aruba_erm_pcap(tvb, pinfo, aruba_erm_tree, offset);
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proto_item_set_len(aruba_erm_tree, offset);
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next_tvb = tvb_new_subset_remaining(tvb, offset);
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/* No way to determine if TX or RX packet... (TX = no FCS, RX = FCS...)*/
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call_dissector(wlan_withfcs_handle, next_tvb, pinfo, tree);
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return tvb_captured_length(tvb);
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}
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static int
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dissect_aruba_erm_type1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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int offset = 0;
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dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
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/* Say to PEEK dissector, it is a Aruba PEEK packet */
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call_dissector_with_data(peek_handle, tvb, pinfo, tree, GUINT_TO_POINTER(IS_ARUBA));
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return tvb_captured_length(tvb);
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}
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static int
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dissect_aruba_erm_type2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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int offset = 0;
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dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
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/* Not (yet) supported launch data dissector */
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proto_tree_add_expert(tree, pinfo, &ei_aruba_erm_airmagnet, tvb, offset, -1);
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call_dissector(data_handle, tvb, pinfo, tree);
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return tvb_captured_length(tvb);
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}
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static int
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dissect_aruba_erm_type3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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tvbuff_t * next_tvb;
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int offset = 0;
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proto_tree *aruba_erm_tree;
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struct ieee_802_11_phdr phdr;
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guint32 signal_strength;
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proto_item *ti_data_rate;
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guint16 data_rate;
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guint channel;
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aruba_erm_tree = dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
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offset = dissect_aruba_erm_pcap(tvb, pinfo, aruba_erm_tree, offset);
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memset(&phdr, 0, sizeof(phdr));
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phdr.decrypted = FALSE;
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phdr.datapad = FALSE;
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phdr.phy = PHDR_802_11_PHY_UNKNOWN;
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phdr.has_data_rate = TRUE;
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data_rate = tvb_get_ntohs(tvb, offset);
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phdr.data_rate = data_rate;
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proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_data_rate, tvb, offset, 2, ENC_BIG_ENDIAN);
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ti_data_rate = proto_tree_add_float_format(aruba_erm_tree, hf_aruba_erm_data_rate_gen,
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tvb, 16, 2,
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(float)data_rate / 2,
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"Data Rate: %.1f Mb/s",
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(float)data_rate / 2);
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PROTO_ITEM_SET_GENERATED(ti_data_rate);
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offset += 2;
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proto_tree_add_item_ret_uint(aruba_erm_tree, hf_aruba_erm_channel, tvb, offset, 1, ENC_BIG_ENDIAN, &channel);
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phdr.has_channel = TRUE;
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phdr.channel = channel;
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offset += 1;
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proto_tree_add_item_ret_uint(aruba_erm_tree, hf_aruba_erm_signal_strength, tvb, offset, 1, ENC_BIG_ENDIAN, &signal_strength);
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phdr.has_signal_percent = TRUE;
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phdr.signal_percent = signal_strength;
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offset += 1;
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proto_item_set_len(aruba_erm_tree, offset);
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next_tvb = tvb_new_subset_remaining(tvb, offset);
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if(signal_strength == 100){ /* When signal = 100 %, it is TX packet and there is no FCS */
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phdr.fcs_len = 0; /* TX packet, no FCS */
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} else {
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phdr.fcs_len = 4; /* We have an FCS */
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}
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call_dissector_with_data(wlan_radio_handle, next_tvb, pinfo, tree, &phdr);
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return tvb_captured_length(tvb);
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}
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static int
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dissect_aruba_erm_type4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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int offset = 0;
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dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
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call_dissector(ppi_handle, tvb, pinfo, tree);
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return tvb_captured_length(tvb);
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}
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/* Type 5 is the same of type 1 but with Peek Header version = 2, named internaly Peekremote -ng */
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static int
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dissect_aruba_erm_type5(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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int offset = 0;
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dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
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/* Say to PEEK dissector, it is a Aruba PEEK packet */
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call_dissector_with_data(peek_handle, tvb, pinfo, tree, GUINT_TO_POINTER(IS_ARUBA));
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return tvb_captured_length(tvb);
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}
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static void
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aruba_erm_prompt(packet_info *pinfo _U_, gchar* result)
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{
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g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Aruba ERM payload as");
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}
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static gpointer
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aruba_erm_value(packet_info *pinfo _U_)
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{
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return NULL;
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}
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void
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proto_register_aruba_erm(void)
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{
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static hf_register_info hf[] = {
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{ &hf_aruba_erm_time,
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{ "Packet Capture Timestamp", "aruba_erm.time", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL,
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0x00, NULL, HFILL }},
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{ &hf_aruba_erm_incl_len,
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{ "Packet Captured Length", "aruba_erm.incl_len", FT_UINT32, BASE_DEC, NULL,
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0x00, NULL, HFILL }},
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{ &hf_aruba_erm_orig_len,
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{ "Packet Length", "aruba_erm.orig_len", FT_UINT32, BASE_DEC, NULL,
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0x00, NULL, HFILL }},
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{ &hf_aruba_erm_data_rate,
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{ "Data Rate", "aruba_erm.data_rate", FT_UINT16, BASE_DEC, NULL,
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0x00, "Data rate (1/2 Mb/s)", HFILL }},
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{ &hf_aruba_erm_data_rate_gen,
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{ "Data Rate", "aruba_erm.data_rate_gen", FT_FLOAT, BASE_NONE, NULL,
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0x00, "Data rate (1/2 Mb/s)", HFILL }},
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{ &hf_aruba_erm_channel,
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{ "Channel", "aruba_erm.channel", FT_UINT8, BASE_DEC, NULL,
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0x00, "802.11 channel number that this frame was sent/received on", HFILL }},
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{ &hf_aruba_erm_signal_strength,
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{ "Signal Strength [percent]", "aruba_erm.signal_strength", FT_UINT8, BASE_DEC, NULL,
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0x00, "Signal strength (Percentage)", HFILL }},
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};
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/* both formats share the same tree */
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static gint *ett[] = {
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&ett_aruba_erm,
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};
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static ei_register_info ei[] = {
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{ &ei_aruba_erm_airmagnet, { "aruba_erm.airmagnet", PI_UNDECODED, PI_ERROR, "Airmagnet (type 2) is no yet supported (Please use other type)", EXPFILL }},
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{ &ei_aruba_erm_decode, { "aruba_erm.decode", PI_UNDECODED, PI_NOTE, "Use Decode AS (Aruba ERM Type) for decoding payload", EXPFILL }}
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};
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#if 0
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static const enum_val_t aruba_erm_types[] = {
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{ "pcap_type_0", "pcap (type 0)", TYPE_PCAP},
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{ "peek_type_1", "peek (type 1)", TYPE_PEEK},
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{ "airmagnet_type_2", "Airmagnet (type 2)", TYPE_AIRMAGNET},
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{ "pcapplusradio_type_3", "pcap + radio header (type 3)", TYPE_PCAPPLUSRADIO},
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{ "ppi_type_4", "PPI (type 4)", TYPE_PPI},
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{ NULL, NULL, -1}
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};
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#endif
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module_t *aruba_erm_module;
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/* Decode As handling */
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static build_valid_func aruba_erm_payload_da_build_value[1] = {aruba_erm_value};
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static decode_as_value_t aruba_erm_payload_da_values = {aruba_erm_prompt, 1, aruba_erm_payload_da_build_value};
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static decode_as_t aruba_erm_payload_da = {
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"aruba_erm", "Aruba ERM Type", "aruba_erm.type", 1, 0,
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&aruba_erm_payload_da_values, NULL, NULL,
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decode_as_default_populate_list,
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decode_as_default_reset,
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decode_as_default_change,
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NULL,
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};
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expert_module_t* expert_aruba_erm;
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proto_aruba_erm = proto_register_protocol(PROTO_LONG_NAME, "ARUBA_ERM" , "aruba_erm");
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proto_aruba_erm_type0 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PCAP (Type 0)", "ARUBA ERM PCAP (Type 0)", "aruba_erm_type0");
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proto_aruba_erm_type1 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PEEK (Type 1)", "ARUBA ERM PEEK (type 1)", "aruba_erm_type1");
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proto_aruba_erm_type2 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - AIRMAGNET (Type 2)", "ARUBA ERM AIRMAGNET (Type 2)", "aruba_erm_type2");
|
|
proto_aruba_erm_type3 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PCAP+RADIO (Type 3)", "ARUBA ERM PCAP+RADIO (Type 3)", "aruba_erm_type3");
|
|
proto_aruba_erm_type4 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PPI (Type 4)", "ARUBA ERM PPI (Type 4)", "aruba_erm_type4");
|
|
proto_aruba_erm_type5 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PEEK (Type 5)", "ARUBA ERM PEEK-NG (type 5)", "aruba_erm_type5");
|
|
|
|
range_convert_str (&global_aruba_erm_port_range, "0", MAX_UDP_PORT);
|
|
|
|
aruba_erm_module = prefs_register_protocol(proto_aruba_erm, proto_reg_handoff_aruba_erm);
|
|
|
|
prefs_register_range_preference(aruba_erm_module, "udp.ports", "ARUBA_ERM UDP Port numbers",
|
|
"Set the UDP port numbers (typically the range 5555 to 5560) used for Aruba Networks"
|
|
" encapsulated remote mirroring frames;\n"
|
|
"0 (default) means that the ARUBA_ERM dissector is not active\n",
|
|
&global_aruba_erm_port_range, MAX_UDP_PORT);
|
|
#if 0
|
|
/* Obso...*/
|
|
prefs_register_enum_preference(aruba_erm_module, "type.captured",
|
|
"Type of formats for captured packets",
|
|
"Type of formats for captured packets",
|
|
&aruba_erm_type, aruba_erm_types, FALSE);
|
|
#endif
|
|
prefs_register_obsolete_preference(aruba_erm_module, "type.captured");
|
|
|
|
proto_register_field_array(proto_aruba_erm, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_aruba_erm = expert_register_protocol(proto_aruba_erm);
|
|
expert_register_field_array(expert_aruba_erm, ei, array_length(ei));
|
|
|
|
aruba_erm_subdissector_table = register_dissector_table(
|
|
"aruba_erm.type", "Aruba ERM Type",
|
|
FT_UINT32, BASE_DEC, DISSECTOR_TABLE_NOT_ALLOW_DUPLICATE);
|
|
|
|
register_decode_as(&aruba_erm_payload_da);
|
|
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_aruba_erm(void)
|
|
{
|
|
static range_t *aruba_erm_port_range;
|
|
static range_t *aruba_erm_radio_port_range;
|
|
static gboolean initialized = FALSE;
|
|
|
|
if (!initialized) {
|
|
wlan_radio_handle = find_dissector("wlan_radio");
|
|
wlan_withfcs_handle = find_dissector("wlan_withfcs");
|
|
ppi_handle = find_dissector("ppi");
|
|
peek_handle = find_dissector("peekremote");
|
|
data_handle = find_dissector("data");
|
|
aruba_erm_handle = create_dissector_handle(dissect_aruba_erm, proto_aruba_erm);
|
|
aruba_erm_handle_type0 = create_dissector_handle(dissect_aruba_erm_type0, proto_aruba_erm_type0);
|
|
aruba_erm_handle_type1 = create_dissector_handle(dissect_aruba_erm_type1, proto_aruba_erm_type1);
|
|
aruba_erm_handle_type2 = create_dissector_handle(dissect_aruba_erm_type2, proto_aruba_erm_type2);
|
|
aruba_erm_handle_type3 = create_dissector_handle(dissect_aruba_erm_type3, proto_aruba_erm_type3);
|
|
aruba_erm_handle_type4 = create_dissector_handle(dissect_aruba_erm_type4, proto_aruba_erm_type4);
|
|
aruba_erm_handle_type5 = create_dissector_handle(dissect_aruba_erm_type5, proto_aruba_erm_type5);
|
|
initialized = TRUE;
|
|
} else {
|
|
dissector_delete_uint_range("udp.port", aruba_erm_port_range, aruba_erm_handle);
|
|
g_free(aruba_erm_port_range);
|
|
g_free(aruba_erm_radio_port_range);
|
|
}
|
|
|
|
aruba_erm_port_range = range_copy(global_aruba_erm_port_range);
|
|
|
|
dissector_add_uint_range("udp.port", aruba_erm_port_range, aruba_erm_handle);
|
|
dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type0);
|
|
dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type1);
|
|
dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type2);
|
|
dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type3);
|
|
dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type4);
|
|
dissector_add_for_decode_as("aruba_erm.type", aruba_erm_handle_type5);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|