diff options
Diffstat (limited to 'plugins/epan/wimax/wimax_fch_decoder.c')
| -rw-r--r-- | plugins/epan/wimax/wimax_fch_decoder.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/plugins/epan/wimax/wimax_fch_decoder.c b/plugins/epan/wimax/wimax_fch_decoder.c new file mode 100644 index 0000000..60f0251 --- /dev/null +++ b/plugins/epan/wimax/wimax_fch_decoder.c @@ -0,0 +1,246 @@ +/* wimax_fch_decoder.c + * WiMax FCH Burst decoder + * + * Copyright (c) 2007 by Intel Corporation. + * + * Author: Lu Pan <lu.pan@intel.com> + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1999 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +/* Include files */ + +#include "config.h" + +#include <string.h> + +#include <epan/packet.h> +#include "wimax-int.h" + +extern gint proto_wimax; + +extern address bs_address; /* declared in packet-wmx.c */ + +static int proto_wimax_fch_decoder = -1; +static gint ett_wimax_fch_decoder = -1; + +#define FCH_BURST_LENGTH 3 +/* FCH Burst bits */ +#define USED_SUB_CHANNEL_GROUP_0 0x800000 +#define USED_SUB_CHANNEL_GROUP_1 0x400000 +#define USED_SUB_CHANNEL_GROUP_2 0x200000 +#define USED_SUB_CHANNEL_GROUP_3 0x100000 +#define USED_SUB_CHANNEL_GROUP_4 0x080000 +#define USED_SUB_CHANNEL_GROUP_5 0x040000 +#define FCH_RESERVED_1 0x020000 +#define REPETITION_CODING_INDICATION 0x018000 +#define CODING_INDICATION 0x007000 +#define DL_MAP_LENGTH 0x000FF0 +#define FCH_RESERVED_2 0x00000F + +static int hf_fch_used_subchannel_group0 = -1; +static int hf_fch_used_subchannel_group1 = -1; +static int hf_fch_used_subchannel_group2 = -1; +static int hf_fch_used_subchannel_group3 = -1; +static int hf_fch_used_subchannel_group4 = -1; +static int hf_fch_used_subchannel_group5 = -1; +static int hf_fch_reserved_1 = -1; +static int hf_fch_repetition_coding_indication = -1; +static int hf_fch_coding_indication = -1; +static int hf_fch_dlmap_length = -1; +static int hf_fch_reserved_2 = -1; + +static const value_string used_or_not_used[] = +{ + { 0, "Is Not Used" }, + { 1, "Is Used" }, + { 0, NULL } +}; + +/* DL Frame Prefix Repetition Coding Indications */ +static const value_string repetition_coding_indications[] = +{ + { 0, "No Repetition Coding" }, + { 1, "Repetition Coding of 2 Used" }, + { 2, "Repetition Coding of 4 Used" }, + { 3, "Repetition Coding of 6 Used" }, + { 0, NULL } +}; + +/* DL Frame Prefix Coding Indications */ +static const value_string coding_indications[] = +{ + { 0, "CC Encoding Used" }, + { 1, "BTC Encoding Used" }, + { 2, "CTC Encoding Used" }, + { 3, "ZT CC Encoding Used" }, + { 4, "CC Encoding with optional interleaver" }, + { 5, "LDPC Encoding Used" }, + { 6, "Reserved" }, + { 7, "Reserved" }, + { 0, NULL } +}; + +static int dissect_wimax_fch_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + gint offset = 0; + proto_item *fch_item = NULL; + proto_tree *fch_tree = NULL; + + /* save the base station address (once) */ + if(!bs_address.len) + copy_address(&bs_address, &(pinfo->src)); + /* update the info column */ + col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "FCH"); + if (tree) + { /* we are being asked for details */ + /* display FCH dissector info */ + fch_item = proto_tree_add_protocol_format(tree, proto_wimax_fch_decoder, tvb, offset, 3, "DL Frame Prefix (24 bits)"); + /* add FCH subtree */ + fch_tree = proto_item_add_subtree(fch_item, ett_wimax_fch_decoder); + /* Decode and display the used sub-channel groups */ + proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group0, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group1, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group2, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group3, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group4, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(fch_tree, hf_fch_used_subchannel_group5, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(fch_tree, hf_fch_reserved_1, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + /* Decode and display the repetition coding indication */ + proto_tree_add_item(fch_tree, hf_fch_repetition_coding_indication, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + /* Decode and display the coding indication */ + proto_tree_add_item(fch_tree, hf_fch_coding_indication, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + /* Decode and display the DL MAP length */ + proto_tree_add_item(fch_tree, hf_fch_dlmap_length, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(fch_tree, hf_fch_reserved_2, tvb, offset, FCH_BURST_LENGTH, ENC_BIG_ENDIAN); + } + return tvb_captured_length(tvb); +} + +/* Register Wimax FCH Protocol */ +void wimax_proto_register_wimax_fch(void) +{ + /* TLV display */ + static hf_register_info hf[] = + { + { + &hf_fch_used_subchannel_group0, + { + "Sub-Channel Group 0", "wmx.fch.subchannel_group0", + FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_0, + NULL, HFILL + } + }, + { + &hf_fch_used_subchannel_group1, + { + "Sub-Channel Group 1", "wmx.fch.subchannel_group1", + FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_1, + NULL, HFILL + } + }, + { + &hf_fch_used_subchannel_group2, + { + "Sub-Channel Group 2", "wmx.fch.subchannel_group2", + FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_2, + NULL, HFILL + } + }, + { + &hf_fch_used_subchannel_group3, + { + "Sub-Channel Group 3", "wmx.fch.subchannel_group3", + FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_3, + NULL, HFILL + } + }, + { + &hf_fch_used_subchannel_group4, + { + "Sub-Channel Group 4", "wmx.fch.subchannel_group4", + FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_4, + NULL, HFILL + } + }, + { + &hf_fch_used_subchannel_group5, + { + "Sub-Channel Group 5", "wmx.fch.subchannel_group5", + FT_UINT24, BASE_DEC, VALS(used_or_not_used), USED_SUB_CHANNEL_GROUP_5, + NULL, HFILL + } + }, + { + &hf_fch_reserved_1, + { + "Reserved", "wmx.fch.reserved1", + FT_UINT24, BASE_DEC, NULL, FCH_RESERVED_1, + NULL, HFILL + } + }, + { + &hf_fch_repetition_coding_indication, + { + "Repetition Coding Indication", "wmx.fch.repetition_coding_indication", + FT_UINT24, BASE_DEC, VALS(repetition_coding_indications), REPETITION_CODING_INDICATION, + NULL, HFILL + } + }, + { + &hf_fch_coding_indication, + { + "Coding Indication", "wmx.fch.coding_indication", + FT_UINT24, BASE_DEC, VALS(coding_indications), CODING_INDICATION, + NULL, HFILL + } + }, + { + &hf_fch_dlmap_length, + { + "DL Map Length", "wmx.fch.dl_map_length", + FT_UINT24, BASE_DEC, NULL, DL_MAP_LENGTH, + NULL, HFILL + } + }, + { + &hf_fch_reserved_2, + { + "Reserved", "wmx.fch.reserved2", + FT_UINT24, BASE_DEC, NULL, FCH_RESERVED_2, + NULL, HFILL + } + } + }; + + /* Setup protocol subtree array */ + static gint *ett[] = + { + &ett_wimax_fch_decoder, + }; + + proto_wimax_fch_decoder = proto_wimax; + + /* register the field display messages */ + proto_register_field_array(proto_wimax_fch_decoder, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + register_dissector("wimax_fch_burst_handler", dissect_wimax_fch_decoder, proto_wimax_fch_decoder); +} + +/* + * Editor modelines - https://www.wireshark.org/tools/modelines.html + * + * Local variables: + * c-basic-offset: 8 + * tab-width: 8 + * indent-tabs-mode: t + * End: + * + * vi: set shiftwidth=8 tabstop=8 noexpandtab: + * :indentSize=8:tabSize=8:noTabs=false: + */ |