Wireshark-bugs: [Wireshark-bugs] [Bug 4508] Add new GSMTAP dissector
Date: Tue, 26 Apr 2011 16:56:32 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4508 --- Comment #8 from ali yaman <ceo_1234@xxxxxxxxxxx> 2011-04-26 16:56:29 PDT --- (From update of attachment 4363) >Index: epan/dissectors/packet-gsmtap.c >=================================================================== >--- /dev/null >+++ epan/dissectors/packet-gsmtap.c >@@ -0,0 +1,345 @@ >+/* packet-gsmtap.c >+ * Routines for GSMTAP captures >+ * >+ * (C) 2008-2010 by Harald Welte <laforge@xxxxxxxxxxxx> >+ * >+ * $Id$ >+ * >+ * Wireshark - Network traffic analyzer >+ * By Gerald Combs <gerald@xxxxxxxxxxxxx> >+ * 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/) >+ */ >+ >+#ifdef HAVE_CONFIG_H >+# include "config.h" >+#endif >+ >+#include <glib.h> >+#include <epan/packet.h> >+#include <epan/prefs.h> >+ >+#include "packet-gsmtap.h" >+ >+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_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_ABIS, >+ >+ 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" }, >+ { 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_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_F, "SACCH/H" }, >+ { 0, NULL }, >+}; >+ >+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)" }, >+ { 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, FALSE); >+ /* Fast Power Control */ >+ proto_tree_add_item(l1h_tree, hf_sacch_l1h_fpc, tvb, 0, 1, FALSE); >+ /* Acutal Timing Advance */ >+ proto_tree_add_item(l1h_tree, hf_sacch_l1h_ta, tvb, 1, 1, FALSE); >+} >+ >+/* 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) { >+ 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), >+ match_strval(tvb_get_guint8(tvb, offset+12), gsmtap_channels), >+ 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, FALSE); >+ 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, FALSE); >+ proto_tree_add_item(gsmtap_tree, hf_gsmtap_timeslot, >+ tvb, offset+3, 1, FALSE); >+ proto_tree_add_item(gsmtap_tree, hf_gsmtap_arfcn, >+ tvb, offset+4, 2, FALSE); >+ proto_tree_add_item(gsmtap_tree, hf_gsmtap_uplink, >+ tvb, offset+4, 2, FALSE); >+ proto_tree_add_item(gsmtap_tree, hf_gsmtap_noise_dbm, >+ tvb, offset+6, 1, FALSE); >+ proto_tree_add_item(gsmtap_tree, hf_gsmtap_signal_dbm, >+ tvb, offset+7, 1, FALSE); >+ proto_tree_add_item(gsmtap_tree, hf_gsmtap_frame_nr, >+ tvb, offset+8, 4, FALSE); >+ if (type == GSMTAP_TYPE_UM_BURST) >+ proto_tree_add_item(gsmtap_tree, hf_gsmtap_burst_type, >+ tvb, offset+12, 1, FALSE); >+ else if (type == GSMTAP_TYPE_UM) >+ proto_tree_add_item(gsmtap_tree, hf_gsmtap_channel_type, >+ tvb, offset+12, 1, FALSE); >+ proto_tree_add_item(gsmtap_tree, hf_gsmtap_antenna, >+ tvb, offset+13, 1, FALSE); >+ proto_tree_add_item(gsmtap_tree, hf_gsmtap_subslot, >+ tvb, offset+14, 1, FALSE); >+ } >+ >+ 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_RACH: >+ 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_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_ABIS] = find_dissector("gsm_a_dtap"); >+ gsmtap_handle = create_dissector_handle(dissect_gsmtap, proto_gsmtap); >+ dissector_add("udp.port", GSMTAP_UDP_PORT, gsmtap_handle); >+} >Index: epan/dissectors/packet-gsmtap.h >=================================================================== >--- /dev/null >+++ epan/dissectors/packet-gsmtap.h >@@ -0,0 +1,70 @@ >+#ifndef _GSMTAP_H >+#define _GSMTAP_H >+ >+/* gsmtap header, pseudo-header in front of the actua/ GSM payload */ >+ >+/* 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/) >+ */ >+ >+#define GSMTAP_TYPE_UM 0x01 >+#define GSMTAP_TYPE_ABIS 0x02 >+#define GSMTAP_TYPE_UM_BURST 0x03 /* raw burst bits */ >+ >+#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 >+ >+#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_ACCH 0x80 >+ >+#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) >+} >+ */ >+ >+#endif /* _GSMTAP_H */ >Index: epan/dissectors/Makefile.common >=================================================================== >--- epan/dissectors/Makefile.common.orig >+++ epan/dissectors/Makefile.common >@@ -484,6 +484,7 @@ > packet-gsm_sms.c \ > packet-gsm_sms_ud.c \ > packet-gsm_um.c \ >+ packet-gsmtap.c \ > packet-gssapi.c \ > packet-gtp.c \ > packet-gtpv2.c \ >@@ -1072,6 +1073,7 @@ > packet-gsm_a_common.h \ > packet-gsm_map.h \ > packet-gsm_sms.h \ >+ packet-gsmtap.h \ > packet-gssapi.h \ > packet-gtp.h \ > packet-h223.h \ -- Configure bugmail: https://bugs.wireshark.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.
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