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wireshark/epan/dissectors/packet-aruba-erm.c

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/* packet-aruba-erm.c
* Routines for the disassembly of Aruba encapsulated remote mirroring frames
* (Adapted from packet-hp-erm.c and packet-cisco-erspan.c)
*
* Copyright 2010 Alexis La Goutte <alexis.lagoutte at gmail dot com>
*
* ERM Radio-Format added by Hadriel Kaplan
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/*
* See
*
* http://community.arubanetworks.com/t5/Unified-Wired-Wireless-Access/Bug-in-ArubaOS-Packet-Capture/td-p/237984
*
* http://kjspgd.net/?p=30
*
* for more information.
*/
/*
* Formats:
*
* Pcap (type 0):
*
* Payload contains a pcap record header:
*
* typedef struct pcaprec_hdr_s {
* guint32 ts_sec; timestamp seconds
* guint32 ts_usec; timestamp microseconds
* guint32 incl_len; number of octets of packet saved in file
* guint32 orig_len; actual length of packet
* } pcaprec_hdr_t;
*
* followed by the packet data, starting with an 802.11 header.
*
* Peek (type 1):
*
* Payload contains a "Peek remote" packet, as supported by
* EtherPeek/AiroPeek/OmniPeek.
*
* Airmagnet (type 2):
*
* Unknown payload format.
*
* Pcap + radio header (type 3):
*
* Payload contains a pcap record header, as per the above, followed
* by a header with radio information:
*
* struct radio_hdr {
* __u16 rate_per_half_mhz;
* __u8 channel;
* __u8 signal_percent;
* } __attribute__ ((packed));
*
* followed by the packet data, starting with an 802.11 header.
*
* PPI (type 4):
*
* Payload contains a PPI header followed by the packet data, starting
* with an 802.11 header.
*
* Peek 11n/11ac (type 5):
*
* This is probably the "new" "Peek remote" format. The "Peek remote"
* dissector should probably be able to distinguish this from type 1,
* as the "new" format has a magic number in it. Given that there's
* a heuristic "Peek remote new" dissector, those packets might
* automatically be recognized without setting any preference whatsoever.
*/
#include "config.h"
#include <wiretap/wtap.h>
#include <epan/packet.h>
#include <epan/expert.h>
#include <epan/prefs.h>
#include <epan/decode_as.h>
#define PROTO_SHORT_NAME "ARUBA_ERM"
#define PROTO_LONG_NAME "Aruba Networks encapsulated remote mirroring"
#define TYPE_PCAP 0
#define TYPE_PEEK 1
#define TYPE_AIRMAGNET 2
#define TYPE_PCAPPLUSRADIO 3
#define TYPE_PPI 4
#define IS_ARUBA 0x01
#if 0
static const value_string aruba_erm_type_vals[] = {
{ TYPE_PCAP, "pcap (type 0)" },
{ TYPE_PEEK, "peek (type 1)" },
{ TYPE_AIRMAGNET, "Airmagnet (type 2)" },
{ TYPE_PCAPPLUSRADIO, "pcap + radio header (type 3)" },
{ TYPE_PPI, "PPI (type 4)" },
{ 0, NULL }
};
#endif
void proto_register_aruba_erm(void);
void proto_reg_handoff_aruba_erm(void);
void proto_reg_handoff_aruba_erm_radio(void);
#if 0
static gint aruba_erm_type = 0;
#endif
static int proto_aruba_erm = -1;
static int proto_aruba_erm_type0 = -1;
static int proto_aruba_erm_type1 = -1;
static int proto_aruba_erm_type2 = -1;
static int proto_aruba_erm_type3 = -1;
static int proto_aruba_erm_type4 = -1;
static int proto_aruba_erm_type5 = -1;
static int hf_aruba_erm_time = -1;
static int hf_aruba_erm_incl_len = -1;
static int hf_aruba_erm_orig_len = -1;
static int hf_aruba_erm_data_rate = -1;
static int hf_aruba_erm_data_rate_gen = -1;
static int hf_aruba_erm_channel = -1;
static int hf_aruba_erm_signal_strength = -1;
static gint ett_aruba_erm = -1;
static expert_field ei_aruba_erm_airmagnet = EI_INIT;
static expert_field ei_aruba_erm_decode = EI_INIT;
static dissector_handle_t aruba_erm_handle;
static dissector_handle_t aruba_erm_handle_type0;
static dissector_handle_t aruba_erm_handle_type1;
static dissector_handle_t aruba_erm_handle_type2;
static dissector_handle_t aruba_erm_handle_type3;
static dissector_handle_t aruba_erm_handle_type4;
static dissector_handle_t aruba_erm_handle_type5;
static dissector_handle_t wlan_radio_handle;
static dissector_handle_t wlan_withfcs_handle;
static dissector_handle_t peek_handle;
static dissector_handle_t ppi_handle;
static dissector_table_t aruba_erm_subdissector_table;
static int
dissect_aruba_erm_pcap(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *aruba_erm_tree, gint offset)
{
nstime_t ts;
ts.secs = tvb_get_ntohl(tvb, 0);
ts.nsecs = tvb_get_ntohl(tvb,4)*1000;
proto_tree_add_time(aruba_erm_tree, hf_aruba_erm_time, tvb, offset, 8,&ts);
offset +=8;
proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_incl_len, tvb, 8, 4, ENC_BIG_ENDIAN);
offset +=4;
proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_orig_len, tvb, 12, 4, ENC_BIG_ENDIAN);
offset +=4;
return offset;
}
static proto_tree *
dissect_aruba_erm_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int *offset _U_)
{
proto_item *ti;
proto_tree *aruba_erm_tree;
col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
col_set_str(pinfo->cinfo, COL_INFO, PROTO_SHORT_NAME);
ti = proto_tree_add_item(tree, proto_aruba_erm, tvb, 0, 0, ENC_NA);
aruba_erm_tree = proto_item_add_subtree(ti, ett_aruba_erm);
return aruba_erm_tree;
}
static int
dissect_aruba_erm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
int offset = 0;
/*
* Implement "Decode As", as Aruba ERM doesn't
* have a unique identifier to determine subdissector
*/
if (!dissector_try_uint(aruba_erm_subdissector_table, 0, tvb, pinfo, tree)) {
dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
/* Add Expert info how decode...*/
proto_tree_add_expert(tree, pinfo, &ei_aruba_erm_decode, tvb, offset, -1);
call_data_dissector(tvb, pinfo, tree);
}
return tvb_captured_length(tvb);
}
static int
dissect_aruba_erm_type0(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
tvbuff_t * next_tvb;
int offset = 0;
proto_tree *aruba_erm_tree;
aruba_erm_tree = dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
offset = dissect_aruba_erm_pcap(tvb, pinfo, aruba_erm_tree, offset);
proto_item_set_len(aruba_erm_tree, offset);
next_tvb = tvb_new_subset_remaining(tvb, offset);
/* No way to determine if TX or RX packet... (TX = no FCS, RX = FCS...)*/
call_dissector(wlan_withfcs_handle, next_tvb, pinfo, tree);
return tvb_captured_length(tvb);
}
static int
dissect_aruba_erm_type1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
int offset = 0;
dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
/* Say to PEEK dissector, it is a Aruba PEEK packet */
call_dissector_with_data(peek_handle, tvb, pinfo, tree, GUINT_TO_POINTER(IS_ARUBA));
return tvb_captured_length(tvb);
}
static int
dissect_aruba_erm_type2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
int offset = 0;
dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
/* Not (yet) supported launch data dissector */
proto_tree_add_expert(tree, pinfo, &ei_aruba_erm_airmagnet, tvb, offset, -1);
call_data_dissector(tvb, pinfo, tree);
return tvb_captured_length(tvb);
}
static int
dissect_aruba_erm_type3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
tvbuff_t * next_tvb;
int offset = 0;
proto_tree *aruba_erm_tree;
struct ieee_802_11_phdr phdr;
guint32 signal_strength;
proto_item *ti_data_rate;
guint16 data_rate;
guint channel;
aruba_erm_tree = dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
offset = dissect_aruba_erm_pcap(tvb, pinfo, aruba_erm_tree, offset);
memset(&phdr, 0, sizeof(phdr));
phdr.decrypted = FALSE;
phdr.datapad = FALSE;
phdr.phy = PHDR_802_11_PHY_UNKNOWN;
phdr.has_data_rate = TRUE;
data_rate = tvb_get_ntohs(tvb, offset);
phdr.data_rate = data_rate;
proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_data_rate, tvb, offset, 2, ENC_BIG_ENDIAN);
ti_data_rate = proto_tree_add_float_format(aruba_erm_tree, hf_aruba_erm_data_rate_gen,
tvb, 16, 2,
(float)data_rate / 2,
"Data Rate: %.1f Mb/s",
(float)data_rate / 2);
PROTO_ITEM_SET_GENERATED(ti_data_rate);
offset += 2;
proto_tree_add_item_ret_uint(aruba_erm_tree, hf_aruba_erm_channel, tvb, offset, 1, ENC_BIG_ENDIAN, &channel);
phdr.has_channel = TRUE;
phdr.channel = channel;
offset += 1;
proto_tree_add_item_ret_uint(aruba_erm_tree, hf_aruba_erm_signal_strength, tvb, offset, 1, ENC_BIG_ENDIAN, &signal_strength);
phdr.has_signal_percent = TRUE;
phdr.signal_percent = signal_strength;
offset += 1;
proto_item_set_len(aruba_erm_tree, offset);
next_tvb = tvb_new_subset_remaining(tvb, offset);
if(signal_strength == 100){ /* When signal = 100 %, it is TX packet and there is no FCS */
phdr.fcs_len = 0; /* TX packet, no FCS */
} else {
phdr.fcs_len = 4; /* We have an FCS */
}
call_dissector_with_data(wlan_radio_handle, next_tvb, pinfo, tree, &phdr);
return tvb_captured_length(tvb);
}
static int
dissect_aruba_erm_type4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
int offset = 0;
dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
call_dissector(ppi_handle, tvb, pinfo, tree);
return tvb_captured_length(tvb);
}
/* Type 5 is the same of type 1 but with Peek Header version = 2, named internaly Peekremote -ng */
static int
dissect_aruba_erm_type5(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
int offset = 0;
dissect_aruba_erm_common(tvb, pinfo, tree, &offset);
/* Say to PEEK dissector, it is a Aruba PEEK packet */
call_dissector_with_data(peek_handle, tvb, pinfo, tree, GUINT_TO_POINTER(IS_ARUBA));
return tvb_captured_length(tvb);
}
static void
aruba_erm_prompt(packet_info *pinfo _U_, gchar* result)
{
g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Aruba ERM payload as");
}
static gpointer
aruba_erm_value(packet_info *pinfo _U_)
{
return NULL;
}
void
proto_register_aruba_erm(void)
{
static hf_register_info hf[] = {
{ &hf_aruba_erm_time,
{ "Packet Capture Timestamp", "aruba_erm.time", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL,
0x00, NULL, HFILL }},
{ &hf_aruba_erm_incl_len,
{ "Packet Captured Length", "aruba_erm.incl_len", FT_UINT32, BASE_DEC, NULL,
0x00, NULL, HFILL }},
{ &hf_aruba_erm_orig_len,
{ "Packet Length", "aruba_erm.orig_len", FT_UINT32, BASE_DEC, NULL,
0x00, NULL, HFILL }},
{ &hf_aruba_erm_data_rate,
{ "Data Rate", "aruba_erm.data_rate", FT_UINT16, BASE_DEC, NULL,
0x00, "Data rate (1/2 Mb/s)", HFILL }},
{ &hf_aruba_erm_data_rate_gen,
{ "Data Rate", "aruba_erm.data_rate_gen", FT_FLOAT, BASE_NONE, NULL,
0x00, "Data rate (1/2 Mb/s)", HFILL }},
{ &hf_aruba_erm_channel,
{ "Channel", "aruba_erm.channel", FT_UINT8, BASE_DEC, NULL,
0x00, "802.11 channel number that this frame was sent/received on", HFILL }},
{ &hf_aruba_erm_signal_strength,
{ "Signal Strength [percent]", "aruba_erm.signal_strength", FT_UINT8, BASE_DEC, NULL,
0x00, "Signal strength (Percentage)", HFILL }},
};
/* both formats share the same tree */
static gint *ett[] = {
&ett_aruba_erm,
};
static ei_register_info ei[] = {
{ &ei_aruba_erm_airmagnet, { "aruba_erm.airmagnet", PI_UNDECODED, PI_ERROR, "Airmagnet (type 2) is no yet supported (Please use other type)", EXPFILL }},
{ &ei_aruba_erm_decode, { "aruba_erm.decode", PI_UNDECODED, PI_NOTE, "Use Decode AS (Aruba ERM Type) for decoding payload", EXPFILL }}
};
#if 0
static const enum_val_t aruba_erm_types[] = {
{ "pcap_type_0", "pcap (type 0)", TYPE_PCAP},
{ "peek_type_1", "peek (type 1)", TYPE_PEEK},
{ "airmagnet_type_2", "Airmagnet (type 2)", TYPE_AIRMAGNET},
{ "pcapplusradio_type_3", "pcap + radio header (type 3)", TYPE_PCAPPLUSRADIO},
{ "ppi_type_4", "PPI (type 4)", TYPE_PPI},
{ NULL, NULL, -1}
};
#endif
module_t *aruba_erm_module;
/* Decode As handling */
static build_valid_func aruba_erm_payload_da_build_value[1] = {aruba_erm_value};
static decode_as_value_t aruba_erm_payload_da_values = {aruba_erm_prompt, 1, aruba_erm_payload_da_build_value};
static decode_as_t aruba_erm_payload_da = {
"aruba_erm", "Aruba ERM Type", "aruba_erm.type", 1, 0,
&aruba_erm_payload_da_values, NULL, NULL,
decode_as_default_populate_list,
decode_as_default_reset,
decode_as_default_change,
NULL,
};
expert_module_t* expert_aruba_erm;
proto_aruba_erm = proto_register_protocol(PROTO_LONG_NAME, "ARUBA_ERM" , "aruba_erm");
proto_aruba_erm_type0 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PCAP (Type 0)", "ARUBA ERM PCAP (Type 0)", "aruba_erm_type0");
proto_aruba_erm_type1 = proto_register_protocol("Aruba Networks encapsulated remote mirroring - PEEK (Type 1)", "ARUBA ERM PEEK (type 1)", "aruba_erm_type1");
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");
aruba_erm_module = prefs_register_protocol(proto_aruba_erm, NULL);
#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));
register_dissector("aruba_erm", dissect_aruba_erm, proto_aruba_erm);
aruba_erm_subdissector_table = register_dissector_table(
"aruba_erm.type", "Aruba ERM Type", proto_aruba_erm,
FT_UINT32, BASE_DEC);
register_decode_as(&aruba_erm_payload_da);
}
void
proto_reg_handoff_aruba_erm(void)
{
wlan_radio_handle = find_dissector_add_dependency("wlan_radio", proto_aruba_erm);
wlan_withfcs_handle = find_dissector_add_dependency("wlan_withfcs", proto_aruba_erm);
ppi_handle = find_dissector_add_dependency("ppi", proto_aruba_erm);
peek_handle = find_dissector_add_dependency("peekremote", proto_aruba_erm);
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);
dissector_add_uint_range_with_preference("udp.port", "", 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:
*/
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