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wireshark/epan/dissectors/packet-gsmtap.c
Anders Broman 0bbbcccbeb From Harald Welte: 
In order to ensure one consistent GSMTAP definition, some comments are added to
the code in order to make sure modifications are first merged in the GSMTAP
mainline header file, and then propagated to wireshark.

https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6442

svn path=/trunk/; revision=39366
2011-10-11 18:21:27 +00:00

585 lines
19 KiB
C
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/* packet-gsmtap.c
* Routines for GSMTAP captures
*
* (C) 2008-2011 by Harald Welte <laforge@gnumonks.org>
* (C) 2011 by Holger Hans Peter Freyther
*
* $Id$
*
* 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., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
*/
/* GSMTAP is a generic header format for GSM protocol captures,
* it uses the IANA-assigned UDP port number 4729 and carries
* payload in various formats of GSM interfaces such as Um MAC
* blocks or Um bursts.
*
* Example programs generating GSMTAP data are airprobe
* (http://airprobe.org/) or OsmocomBB (http://bb.osmocom.org/)
*
* It has also been used for Tetra by the OsmocomTETRA project.
* (http://tetra.osmocom.org/)
*
* GSMTAP also carries payload in various formats of WiMAX interfaces.
* It uses the wimax plugin to decode the WiMAX bursts.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#include "packet-tetra.h"
/* ====== DO NOT MAKE UNAPPROVED MODIFICATIONS HERE ===== */
/* The following types and definitions are imported from libosmocore,
* the original source of the GSMTAP format.
*
* prior to getting them accepted/included into the official Osmocom
* GSMTAP definition, available from
* http://cgit.osmocom.org/cgit/libosmocore/tree/include/osmocom/core/gsmtap.h
*
* The GSMTAP maintainer can be contacted via the
* openbsc@lists.osmocom.org mailing list, or by private e-mail
* to laforge@gnumonks.org
*/
/* ====== DO NOT MAKE UNAPPROVED MODIFICATIONS HERE ===== */
#define GSMTAP_TYPE_UM 0x01
#define GSMTAP_TYPE_ABIS 0x02
#define GSMTAP_TYPE_UM_BURST 0x03 /* raw burst bits */
#define GSMTAP_TYPE_SIM 0x04
#define GSMTAP_TYPE_TETRA_I1 0x05 /* tetra air interface */
#define GSMTAP_TTPE_TETRA_I1_BURST 0x06 /* tetra air interface */
#define GSMTAP_TYPE_WMX_BURST 0x07 /* WiMAX burst */
#define GSMTAP_TYPE_GB_LLC 0x08 /* GPRS Gb interface: LLC */
#define GSMTAP_TYPE_GB_SNDCP 0x09 /* GPRS Gb interface: SNDCP */
/* ====== DO NOT MAKE UNAPPROVED MODIFICATIONS HERE ===== */
#define GSMTAP_BURST_UNKNOWN 0x00
#define GSMTAP_BURST_FCCH 0x01
#define GSMTAP_BURST_PARTIAL_SCH 0x02
#define GSMTAP_BURST_SCH 0x03
#define GSMTAP_BURST_CTS_SCH 0x04
#define GSMTAP_BURST_COMPACT_SCH 0x05
#define GSMTAP_BURST_NORMAL 0x06
#define GSMTAP_BURST_DUMMY 0x07
#define GSMTAP_BURST_ACCESS 0x08
#define GSMTAP_BURST_NONE 0x09
/* WiMAX bursts */
#define GSMTAP_BURST_CDMA_CODE 0x10 /* WiMAX CDMA Code Attribute burst */
#define GSMTAP_BURST_FCH 0x11 /* WiMAX FCH burst */
#define GSMTAP_BURST_FFB 0x12 /* WiMAX Fast Feedback burst */
#define GSMTAP_BURST_PDU 0x13 /* WiMAX PDU burst */
#define GSMTAP_BURST_HACK 0x14 /* WiMAX HARQ ACK burst */
#define GSMTAP_BURST_PHY_ATTRIBUTES 0x15 /* WiMAX PHY Attributes burst */
/* ====== DO NOT MAKE UNAPPROVED MODIFICATIONS HERE ===== */
#define GSMTAP_CHANNEL_UNKNOWN 0x00
#define GSMTAP_CHANNEL_BCCH 0x01
#define GSMTAP_CHANNEL_CCCH 0x02
#define GSMTAP_CHANNEL_RACH 0x03
#define GSMTAP_CHANNEL_AGCH 0x04
#define GSMTAP_CHANNEL_PCH 0x05
#define GSMTAP_CHANNEL_SDCCH 0x06
#define GSMTAP_CHANNEL_SDCCH4 0x07
#define GSMTAP_CHANNEL_SDCCH8 0x08
#define GSMTAP_CHANNEL_TCH_F 0x09
#define GSMTAP_CHANNEL_TCH_H 0x0a
#define GSMTAP_CHANNEL_PACCH 0x0b
#define GSMTAP_CHANNEL_ACCH 0x80
/* ====== DO NOT MAKE UNAPPROVED MODIFICATIONS HERE ===== */
/* sub-types for TYPE_TETRA_AIR */
#define GSMTAP_TETRA_BSCH 0x01
#define GSMTAP_TETRA_AACH 0x02
#define GSMTAP_TETRA_SCH_HU 0x03
#define GSMTAP_TETRA_SCH_HD 0x04
#define GSMTAP_TETRA_SCH_F 0x05
#define GSMTAP_TETRA_BNCH 0x06
#define GSMTAP_TETRA_STCH 0x07
#define GSMTAP_TETRA_TCH_F 0x08
#define GSMTAP_ARFCN_F_PCS 0x8000
#define GSMTAP_ARFCN_F_UPLINK 0x4000
#define GSMTAP_ARFCN_MASK 0x3fff
#define GSMTAP_UDP_PORT 4729
/* This is the header as it is used by gsmtap-generating software.
* It is not used by the wireshark dissector and provided for reference only.
struct gsmtap_hdr {
guint8 version; // version, set to 0x01 currently
guint8 hdr_len; // length in number of 32bit words
guint8 type; // see GSMTAP_TYPE_*
guint8 timeslot; // timeslot (0..7 on Um)
guint16 arfcn; // ARFCN (frequency)
gint8 signal_dbm; // signal level in dBm
gint8 snr_db; // signal/noise ratio in dB
guint32 frame_number; // GSM Frame Number (FN)
guint8 sub_type; // Type of burst/channel, see above
guint8 antenna_nr; // Antenna Number
guint8 sub_slot; // sub-slot within timeslot
guint8 res; // reserved for future use (RFU)
}
*/
static int proto_gsmtap = -1;
static int hf_gsmtap_version = -1;
static int hf_gsmtap_hdrlen = -1;
static int hf_gsmtap_type = -1;
static int hf_gsmtap_timeslot = -1;
static int hf_gsmtap_subslot = -1;
static int hf_gsmtap_arfcn = -1;
static int hf_gsmtap_uplink = -1;
static int hf_gsmtap_noise_dbm = -1;
static int hf_gsmtap_signal_dbm = -1;
static int hf_gsmtap_frame_nr = -1;
static int hf_gsmtap_burst_type = -1;
static int hf_gsmtap_channel_type = -1;
static int hf_gsmtap_tetra_channel_type = -1;
static int hf_gsmtap_antenna = -1;
static int hf_sacch_l1h_power_lev = -1;
static int hf_sacch_l1h_fpc = -1;
static int hf_sacch_l1h_ta = -1;
static gint ett_gsmtap = -1;
enum {
GSMTAP_SUB_DATA = 0,
GSMTAP_SUB_UM,
GSMTAP_SUB_UM_LAPDM,
GSMTAP_SUB_UM_RLC_MAC_UL,
GSMTAP_SUB_UM_RLC_MAC_DL,
GSMTAP_SUB_LLC,
GSMTAP_SUB_SNDCP,
GSMTAP_SUB_ABIS,
/* WiMAX sub handles */
GSMTAP_SUB_CDMA_CODE,
GSMTAP_SUB_FCH,
GSMTAP_SUB_FFB,
GSMTAP_SUB_PDU,
GSMTAP_SUB_HACK,
GSMTAP_SUB_PHY_ATTRIBUTES,
GSMTAP_SUB_MAX
};
static dissector_handle_t sub_handles[GSMTAP_SUB_MAX];
static const value_string gsmtap_bursts[] = {
{ GSMTAP_BURST_UNKNOWN, "UNKNOWN" },
{ GSMTAP_BURST_FCCH, "FCCH" },
{ GSMTAP_BURST_PARTIAL_SCH, "PARTIAL SCH" },
{ GSMTAP_BURST_SCH, "SCH" },
{ GSMTAP_BURST_CTS_SCH, "CTS SCH" },
{ GSMTAP_BURST_COMPACT_SCH, "COMPACT SCH" },
{ GSMTAP_BURST_NORMAL, "NORMAL" },
{ GSMTAP_BURST_DUMMY, "DUMMY" },
{ GSMTAP_BURST_ACCESS, "RACH" },
/* WiMAX bursts */
{ GSMTAP_BURST_CDMA_CODE, "CDMA Code" },
{ GSMTAP_BURST_FCH, "FCH" },
{ GSMTAP_BURST_FFB, "Fast Feedback" },
{ GSMTAP_BURST_PDU, "PDU" },
{ GSMTAP_BURST_HACK, "HACK" },
{ GSMTAP_BURST_PHY_ATTRIBUTES, "PHY Attributes" },
{ 0, NULL },
};
static const value_string gsmtap_channels[] = {
{ GSMTAP_CHANNEL_UNKNOWN, "UNKNOWN" },
{ GSMTAP_CHANNEL_BCCH, "BCCH" },
{ GSMTAP_CHANNEL_CCCH, "CCCH" },
{ GSMTAP_CHANNEL_RACH, "RACH" },
{ GSMTAP_CHANNEL_AGCH, "AGCH" },
{ GSMTAP_CHANNEL_PCH, "PCH" },
{ GSMTAP_CHANNEL_SDCCH, "SDCCH" },
{ GSMTAP_CHANNEL_SDCCH4, "SDCCH/4" },
{ GSMTAP_CHANNEL_SDCCH8, "SDCCH/8" },
{ GSMTAP_CHANNEL_TCH_F, "FACCH/F" },
{ GSMTAP_CHANNEL_TCH_H, "FACCH/H" },
{ GSMTAP_CHANNEL_PACCH, "PACCH"},
{ GSMTAP_CHANNEL_ACCH|
GSMTAP_CHANNEL_SDCCH, "LSACCH" },
{ GSMTAP_CHANNEL_ACCH|
GSMTAP_CHANNEL_SDCCH4, "SACCH/4" },
{ GSMTAP_CHANNEL_ACCH|
GSMTAP_CHANNEL_SDCCH8, "SACCH/8" },
{ GSMTAP_CHANNEL_ACCH|
GSMTAP_CHANNEL_TCH_F, "SACCH/F" },
{ GSMTAP_CHANNEL_ACCH|
GSMTAP_CHANNEL_TCH_H, "SACCH/H" },
{ 0, NULL },
};
static const value_string gsmtap_tetra_channels[] = {
{ GSMTAP_TETRA_BSCH, "BSCH" },
{ GSMTAP_TETRA_AACH, "AACH" },
{ GSMTAP_TETRA_SCH_HU, "SCH/HU" },
{ GSMTAP_TETRA_SCH_HD, "SCH/HD" },
{ GSMTAP_TETRA_SCH_F, "SCH/F" },
{ GSMTAP_TETRA_BNCH, "BNCH" },
{ GSMTAP_TETRA_STCH, "STCH" },
{ GSMTAP_TETRA_TCH_F, "AACH" },
{ 0, NULL },
};
/* the mapping is not complete */
static const int gsmtap_to_tetra[9] = {
0,
TETRA_CHAN_BSCH,
TETRA_CHAN_AACH,
TETRA_CHAN_SCH_HU,
0,
TETRA_CHAN_SCH_F,
TETRA_CHAN_BNCH,
TETRA_CHAN_STCH,
0
};
static const value_string gsmtap_types[] = {
{ GSMTAP_TYPE_UM, "GSM Um (MS<->BTS)" },
{ GSMTAP_TYPE_ABIS, "GSM Abis (BTS<->BSC)" },
{ GSMTAP_TYPE_UM_BURST, "GSM Um burst (MS<->BTS)" },
{ GSMTAP_TYPE_SIM, "SIM" },
{ GSMTAP_TYPE_TETRA_I1, "TETRA V+D"},
{ GSMTAP_TTPE_TETRA_I1_BURST, "TETRA V+D burst"},
{ GSMTAP_TYPE_WMX_BURST,"WiMAX burst" },
{ 0, NULL },
};
/* dissect a SACCH L1 header which is included in the first 2 bytes
* of every SACCH frame (according to TS 04.04) */
static void
dissect_sacch_l1h(tvbuff_t *tvb, proto_tree *tree)
{
proto_item *ti;
proto_tree *l1h_tree = NULL;
if (!tree)
return;
ti = proto_tree_add_protocol_format(tree, proto_gsmtap, tvb, 0, 2,
"SACCH L1 Header, Power Level: %u, Timing Advance: %u",
tvb_get_guint8(tvb, 0) & 0x1f,
tvb_get_guint8(tvb, 1));
l1h_tree = proto_item_add_subtree(ti, ett_gsmtap);
/* Power Level */
proto_tree_add_item(l1h_tree, hf_sacch_l1h_power_lev, tvb, 0, 1, ENC_BIG_ENDIAN);
/* Fast Power Control */
proto_tree_add_item(l1h_tree, hf_sacch_l1h_fpc, tvb, 0, 1, ENC_BIG_ENDIAN);
/* Acutal Timing Advance */
proto_tree_add_item(l1h_tree, hf_sacch_l1h_ta, tvb, 1, 1, ENC_BIG_ENDIAN);
}
static void
handle_tetra(int channel _U_, tvbuff_t *payload_tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_)
{
int tetra_chan;
if (channel < 0 || channel > GSMTAP_TETRA_TCH_F)
return;
tetra_chan = gsmtap_to_tetra[channel];
if (tetra_chan <= 0)
return;
tetra_dissect_pdu(tetra_chan, TETRA_DOWNLINK, payload_tvb, tree, pinfo);
}
/* dissect a GSMTAP header and hand payload off to respective dissector */
static void
dissect_gsmtap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
int sub_handle, len, offset = 0;
proto_item *ti;
proto_tree *gsmtap_tree = NULL;
tvbuff_t *payload_tvb, *l1h_tvb = NULL;
guint8 hdr_len, type, sub_type;
guint16 arfcn;
len = tvb_length(tvb);
hdr_len = tvb_get_guint8(tvb, offset + 1) <<2;
type = tvb_get_guint8(tvb, offset + 2);
sub_type = tvb_get_guint8(tvb, offset + 12);
arfcn = tvb_get_ntohs(tvb, offset + 4);
/* In case of a SACCH, there is a two-byte L1 header in front
* of the packet (see TS 04.04) */
if (type == GSMTAP_TYPE_UM &&
sub_type & GSMTAP_CHANNEL_ACCH) {
l1h_tvb = tvb_new_subset(tvb, hdr_len, 2, 2);
payload_tvb = tvb_new_subset(tvb, hdr_len+2, len-(hdr_len+2),
len-(hdr_len+2));
} else {
payload_tvb = tvb_new_subset(tvb, hdr_len, len-hdr_len,
len-hdr_len);
}
/* We don't want any UDP related info left in the INFO field, as the
* gsm_a_dtap dissector will not clear but only append */
col_clear(pinfo->cinfo, COL_INFO);
col_set_str(pinfo->cinfo, COL_PROTOCOL, "GSMTAP");
if (arfcn & GSMTAP_ARFCN_F_UPLINK) {
col_append_str(pinfo->cinfo, COL_RES_NET_SRC, "MS");
col_append_str(pinfo->cinfo, COL_RES_NET_DST, "BTS");
/* p2p_dir is used by the LAPDm dissector */
pinfo->p2p_dir = P2P_DIR_SENT;
} else {
col_set_str(pinfo->cinfo, COL_RES_NET_SRC, "BTS");
switch (sub_type & ~GSMTAP_CHANNEL_ACCH) {
case GSMTAP_CHANNEL_BCCH:
case GSMTAP_CHANNEL_CCCH:
case GSMTAP_CHANNEL_PCH:
case GSMTAP_CHANNEL_AGCH:
col_set_str(pinfo->cinfo, COL_RES_NET_DST, "Broadcast");
break;
default:
col_set_str(pinfo->cinfo, COL_RES_NET_DST, "MS");
break;
}
/* p2p_dir is used by the LAPDm dissector */
pinfo->p2p_dir = P2P_DIR_RECV;
}
if (tree) {
guint8 channel;
const char *channel_str;
channel = tvb_get_guint8(tvb, offset+12);
if (type == GSMTAP_TYPE_TETRA_I1)
channel_str = val_to_str(channel, gsmtap_tetra_channels, "Unknown: %d");
else
channel_str = val_to_str(channel, gsmtap_channels, "Unknown: %d");
ti = proto_tree_add_protocol_format(tree, proto_gsmtap, tvb, 0, hdr_len,
"GSM TAP Header, ARFCN: %u (%s), TS: %u, Channel: %s (%u)",
arfcn & GSMTAP_ARFCN_MASK,
arfcn & GSMTAP_ARFCN_F_UPLINK ? "Uplink" : "Downlink",
tvb_get_guint8(tvb, offset+3),
channel_str,
tvb_get_guint8(tvb, offset+14));
gsmtap_tree = proto_item_add_subtree(ti, ett_gsmtap);
proto_tree_add_item(gsmtap_tree, hf_gsmtap_version,
tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_uint_format(gsmtap_tree, hf_gsmtap_hdrlen,
tvb, offset+1, 1, hdr_len,
"Header length: %u bytes", hdr_len);
proto_tree_add_item(gsmtap_tree, hf_gsmtap_type,
tvb, offset+2, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(gsmtap_tree, hf_gsmtap_timeslot,
tvb, offset+3, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(gsmtap_tree, hf_gsmtap_arfcn,
tvb, offset+4, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(gsmtap_tree, hf_gsmtap_uplink,
tvb, offset+4, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(gsmtap_tree, hf_gsmtap_noise_dbm,
tvb, offset+6, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(gsmtap_tree, hf_gsmtap_signal_dbm,
tvb, offset+7, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(gsmtap_tree, hf_gsmtap_frame_nr,
tvb, offset+8, 4, ENC_BIG_ENDIAN);
if (type == GSMTAP_TYPE_UM_BURST)
proto_tree_add_item(gsmtap_tree, hf_gsmtap_burst_type,
tvb, offset+12, 1, ENC_BIG_ENDIAN);
else if (type == GSMTAP_TYPE_UM)
proto_tree_add_item(gsmtap_tree, hf_gsmtap_channel_type,
tvb, offset+12, 1, ENC_BIG_ENDIAN);
else if (type == GSMTAP_TYPE_TETRA_I1)
proto_tree_add_item(gsmtap_tree, hf_gsmtap_tetra_channel_type,
tvb, offset+12, 1, ENC_BIG_ENDIAN);
else if (type == GSMTAP_TYPE_WMX_BURST)
proto_tree_add_item(gsmtap_tree, hf_gsmtap_burst_type,
tvb, offset+12, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(gsmtap_tree, hf_gsmtap_antenna,
tvb, offset+13, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(gsmtap_tree, hf_gsmtap_subslot,
tvb, offset+14, 1, ENC_BIG_ENDIAN);
}
switch (type) {
case GSMTAP_TYPE_UM:
if (l1h_tvb)
dissect_sacch_l1h(l1h_tvb, tree);
switch (sub_type & ~GSMTAP_CHANNEL_ACCH) {
case GSMTAP_CHANNEL_BCCH:
case GSMTAP_CHANNEL_CCCH:
case GSMTAP_CHANNEL_PCH:
case GSMTAP_CHANNEL_AGCH:
/* FIXME: we might want to skip idle frames */
sub_handle = GSMTAP_SUB_UM;
break;
case GSMTAP_CHANNEL_SDCCH:
case GSMTAP_CHANNEL_SDCCH4:
case GSMTAP_CHANNEL_SDCCH8:
case GSMTAP_CHANNEL_TCH_F:
case GSMTAP_CHANNEL_TCH_H:
sub_handle = GSMTAP_SUB_UM_LAPDM;
break;
case GSMTAP_CHANNEL_PACCH:
if (pinfo->p2p_dir == P2P_DIR_SENT) {
sub_handle = GSMTAP_SUB_UM_RLC_MAC_UL;
}
else
{
sub_handle = GSMTAP_SUB_UM_RLC_MAC_DL;
}
break;
case GSMTAP_CHANNEL_RACH:
default:
sub_handle = GSMTAP_SUB_DATA;
break;
}
break;
case GSMTAP_TYPE_ABIS:
sub_handle = GSMTAP_SUB_ABIS;
break;
case GSMTAP_TYPE_GB_LLC:
sub_handle = GSMTAP_SUB_LLC;
break;
case GSMTAP_TYPE_GB_SNDCP:
sub_handle = GSMTAP_SUB_SNDCP;
break;
case GSMTAP_TYPE_TETRA_I1:
handle_tetra(tvb_get_guint8(tvb, offset+12), payload_tvb, pinfo, tree);
return;
case GSMTAP_TYPE_WMX_BURST:
switch (sub_type) {
case GSMTAP_BURST_CDMA_CODE:
sub_handle = GSMTAP_SUB_CDMA_CODE;
break;
case GSMTAP_BURST_FCH:
sub_handle = GSMTAP_SUB_FCH;
break;
case GSMTAP_BURST_FFB:
sub_handle = GSMTAP_SUB_FFB;
break;
case GSMTAP_BURST_PDU:
sub_handle = GSMTAP_SUB_PDU;
break;
case GSMTAP_BURST_HACK:
sub_handle = GSMTAP_SUB_HACK;
break;
case GSMTAP_BURST_PHY_ATTRIBUTES:
sub_handle = GSMTAP_SUB_PHY_ATTRIBUTES;
break;
default:
sub_handle = GSMTAP_SUB_DATA;
break;
}
break;
case GSMTAP_TYPE_UM_BURST:
default:
sub_handle = GSMTAP_SUB_DATA;
break;
}
call_dissector(sub_handles[sub_handle], payload_tvb, pinfo, tree);
}
static const true_false_string sacch_l1h_fpc_mode_vals = {
"In use",
"Not in use"
};
void
proto_register_gsmtap(void)
{
static hf_register_info hf[] = {
{ &hf_gsmtap_version, { "Version", "gsmtap.version",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_gsmtap_hdrlen, { "Header Length", "gsmtap.hdr_len",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_gsmtap_type, { "Payload Type", "gsmtap.type",
FT_UINT8, BASE_DEC, VALS(gsmtap_types), 0, NULL, HFILL } },
{ &hf_gsmtap_timeslot, { "Time Slot", "gsmtap.ts",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_gsmtap_arfcn, { "ARFCN", "gsmtap.arfcn",
FT_UINT16, BASE_DEC, NULL, GSMTAP_ARFCN_MASK, NULL, HFILL } },
{ &hf_gsmtap_uplink, { "Uplink", "gsmtap.uplink",
FT_UINT16, BASE_DEC, NULL, GSMTAP_ARFCN_F_UPLINK, NULL, HFILL } },
{ &hf_gsmtap_noise_dbm, { "Signal/Noise Ratio (dB)", "gsmtap.snr_db",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_gsmtap_signal_dbm, { "Signal Level (dBm)", "gsmtap.signal_dbm",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_gsmtap_frame_nr, { "GSM Frame Number", "gsmtap.frame_nr",
FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_gsmtap_burst_type, { "Burst Type", "gsmtap.burst_type",
FT_UINT8, BASE_DEC, VALS(gsmtap_bursts), 0, NULL, HFILL }},
{ &hf_gsmtap_channel_type, { "Channel Type", "gsmtap.chan_type",
FT_UINT8, BASE_DEC, VALS(gsmtap_channels), 0, NULL, HFILL }},
{ &hf_gsmtap_tetra_channel_type, { "Channel Type", "gsmtap.tetra_chan_type",
FT_UINT8, BASE_DEC, VALS(gsmtap_tetra_channels), 0, NULL, HFILL }},
{ &hf_gsmtap_antenna, { "Antenna Number", "gsmtap.antenna",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_gsmtap_subslot, { "Sub-Slot", "gsmtap.sub_slot",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_sacch_l1h_power_lev, { "MS power level", "gsmtap.sacch_l1.power_lev",
FT_UINT8, BASE_DEC, NULL, 0x1f, NULL, HFILL } },
{ &hf_sacch_l1h_fpc, { "FPC", "gsmtap.sacch_l1.fpc",
FT_BOOLEAN, 8, TFS(&sacch_l1h_fpc_mode_vals), 0x04,
NULL, HFILL } },
{ &hf_sacch_l1h_ta, { "Actual Timing Advance", "gsmtap.sacch_l1.ta",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
};
static gint *ett[] = {
&ett_gsmtap
};
proto_gsmtap = proto_register_protocol("GSM Radiotap", "GSMTAP", "gsmtap");
proto_register_field_array(proto_gsmtap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_gsmtap(void)
{
dissector_handle_t gsmtap_handle;
sub_handles[GSMTAP_SUB_DATA] = find_dissector("data");
sub_handles[GSMTAP_SUB_UM] = find_dissector("gsm_a_ccch");
sub_handles[GSMTAP_SUB_UM_LAPDM] = find_dissector("lapdm");
sub_handles[GSMTAP_SUB_UM_RLC_MAC_UL] = find_dissector("gsm_rlcmac_ul");
sub_handles[GSMTAP_SUB_UM_RLC_MAC_DL] = find_dissector("gsm_rlcmac_dl");
sub_handles[GSMTAP_SUB_LLC] = find_dissector("llcgprs");
sub_handles[GSMTAP_SUB_SNDCP] = find_dissector("sndcp");
sub_handles[GSMTAP_SUB_ABIS] = find_dissector("gsm_a_dtap");
sub_handles[GSMTAP_SUB_CDMA_CODE] = find_dissector("wimax_cdma_code_burst_handler");
sub_handles[GSMTAP_SUB_FCH] = find_dissector("wimax_fch_burst_handler");
sub_handles[GSMTAP_SUB_FFB] = find_dissector("wimax_ffb_burst_handler");
sub_handles[GSMTAP_SUB_PDU] = find_dissector("wimax_pdu_burst_handler");
sub_handles[GSMTAP_SUB_HACK] = find_dissector("wimax_hack_burst_handler");
sub_handles[GSMTAP_SUB_PHY_ATTRIBUTES] = find_dissector("wimax_phy_attributes_burst_handler");
gsmtap_handle = create_dissector_handle(dissect_gsmtap, proto_gsmtap);
dissector_add_uint("udp.port", GSMTAP_UDP_PORT, gsmtap_handle);
}
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