#define COMPACT_DL_MAP_TYPE_SAFETY		2
#define COMPACT_DL_MAP_TYPE_UIUC		3
#define COMPACT_DL_MAP_TYPE_FORMAT_CONF_IE	4
#define COMPACT_DL_MAP_TYPE_HARQ_ACK_BITMAP_IE	5
#define COMPACT_DL_MAP_TYPE_RESERVED		6
#define COMPACT_DL_MAP_TYPE_EXTENSION		7

/* Compact DL-MAP IE decoder */
guint wimax_compact_dlmap_ie_decoder(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, guint offset, guint nibble_offset)
{
	guint diuc, byte, length = 0;
	guint dl_map_type, ul_map_append;
	guint dl_map_offset, nibble_length, bit_map_length;
	guint nband, band_count, i, allocation_mode;

#ifdef DEBUG
	/* update the info column */
	if (check_col(pinfo->cinfo, COL_INFO))
	{
		col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Compact DL-MAP IEs");
	}
#endif
	/* set the local offset */
	dl_map_offset = offset;
	/* Get the first byte */
	byte = tvb_get_guint8(tvb, dl_map_offset);
	if(nibble_offset & 1)
	{
		dl_map_type = ((byte & DL_MAP_TYPE_MASK_1) >> 1);
		ul_map_append = (byte & UL_MAP_APPEND_MASK_1);
	}
	else
	{
		dl_map_type = ((byte & DL_MAP_TYPE_MASK) >> 5);
		ul_map_append = (byte & UL_MAP_APPEND_MASK);
	}
	switch (dl_map_type)
	{
		case COMPACT_DL_MAP_TYPE_NORMAL_SUBCHANNEL:/* 6.3.2.3.43.6.1 */
			if(nibble_offset & 1)
			{	/* display the DL-MAP type */
				proto_tree_add_item(tree, hf_cdlmap_dl_map_type_1, tvb, dl_map_offset, 1, FALSE);
				/* display the UL-MAP append */
				proto_tree_add_item(tree, hf_cdlmap_ul_map_append_1, tvb, dl_map_offset, 1, FALSE);
				/* move to next byte */
				dl_map_offset++;
				nibble_offset = 0;
			}
			else
			{	/* display the DL-MAP type */
				proto_tree_add_item(tree, hf_cdlmap_dl_map_type, tvb, dl_map_offset, 1, FALSE);
				/* display the UL-MAP append */
				proto_tree_add_item(tree, hf_cdlmap_ul_map_append, tvb, dl_map_offset, 1, FALSE);
				nibble_offset = 1;
			}
			length = 1;
			/* decode RCID IE */
			nibble_length = wimax_compact_dlmap_rcid_ie_decoder(tree, pinfo, tvb, dl_map_offset, nibble_offset);
			length += nibble_length;
			dl_map_offset += (nibble_length >> 1);
			nibble_offset = (nibble_length & 1);
			/* check harq mode */
			if(!harq_mode)
			{	/* display the Nep and Nsch Code */
				if(nibble_offset & 1)
				{
					proto_tree_add_item(tree, hf_cdlmap_nep_code_1, tvb, dl_map_offset, 1, FALSE);
					/* move to next byte */
					dl_map_offset++;
					proto_tree_add_item(tree, hf_cdlmap_nsch_code, tvb, dl_map_offset, 1, FALSE);
				}
				else
				{
					proto_tree_add_item(tree, hf_cdlmap_nep_code, tvb, dl_map_offset, 1, FALSE);
					proto_tree_add_item(tree, hf_cdlmap_nsch_code_1, tvb, dl_map_offset, 1, FALSE);
					/* move to next byte */
					dl_map_offset++;
				}
				length += 2;
			}
			else if(harq_mode == 1)
			{	/* display the Shortened DIUC and Companded SC */
				if(nibble_offset & 1)
				{
					proto_tree_add_item(tree, hf_cdlmap_shortened_diuc_1, tvb, dl_map_offset, 2, FALSE);
					proto_tree_add_item(tree, hf_cdlmap_companded_sc_1, tvb, dl_map_offset, 2, FALSE);
				}
				else
				{
					proto_tree_add_item(tree, hf_cdlmap_shortened_diuc, tvb, dl_map_offset, 1, FALSE);
						proto_tree_add_item(tree, hf_cdlmap_companded_sc, tvb, dl_map_offset, 1, FALSE);
				}
				/* move to next byte */
				dl_map_offset++;
				length += 2;
			}
			/* decode HARQ Control IE */
			nibble_length = wimax_compact_dlmap_harq_control_ie_decoder(tree, pinfo, tvb, dl_map_offset, nibble_offset);
			length += nibble_length;
			dl_map_offset += ((nibble_offset + nibble_length) >> 1);
			nibble_offset = ((nibble_offset + nibble_length) & 1);
			/* decode CQICH Control IE */
			nibble_length = wimax_compact_dlmap_cqich_control_ie_decoder(tree, pinfo, tvb, dl_map_offset, nibble_offset);
			length += nibble_length;
			dl_map_offset += ((nibble_offset + nibble_length) >> 1);
			nibble_offset = ((nibble_offset + nibble_length) & 1);
			if(ul_map_append)
			{	/* check harq mode */
				if(harq_mode == 1)
				{	/* display the Shortened UIUC and Companded SC */
					if(nibble_offset & 1)
					{
						proto_tree_add_item(tree, hf_cdlmap_shortened_uiuc_1, tvb, dl_map_offset, 2, FALSE);
						proto_tree_add_item(tree, hf_cdlmap_companded_sc_1, tvb, dl_map_offset, 2, FALSE);
					}
					else
					{
						proto_tree_add_item(tree, hf_cdlmap_shortened_uiuc, tvb, dl_map_offset, 1, FALSE);
						proto_tree_add_item(tree, hf_cdlmap_companded_sc, tvb, dl_map_offset, 1, FALSE);
					}
					/* move to next byte */
					dl_map_offset++;
					length += 2;
				}
				else if(!harq_mode)
				{	/* display the Nep and Nsch Code */
					if(nibble_offset & 1)
					{
						proto_tree_add_item(tree, hf_cdlmap_nep_code_1, tvb, dl_map_offset, 1, FALSE);
						/* move to next byte */
						dl_map_offset++;
						proto_tree_add_item(tree, hf_cdlmap_nsch_code, tvb, dl_map_offset, 1, FALSE);
					}
					else
					{
						proto_tree_add_item(tree, hf_cdlmap_nep_code, tvb, dl_map_offset, 1, FALSE);
						proto_tree_add_item(tree, hf_cdlmap_nsch_code_1, tvb, dl_map_offset, 1, FALSE);
						/* move to next byte */
						dl_map_offset++;
					}
					length += 2;
				}
				/* decode HARQ Control IE */
				nibble_length = wimax_compact_dlmap_harq_control_ie_decoder(tree, pinfo, tvb, dl_map_offset, nibble_offset);
				length += nibble_length;
			}
		break;
		case COMPACT_DL_MAP_TYPE_BAND_AMC:/* 6.3.2.3.43.6.2 */
			if(nibble_offset & 1)
			{	/* display the DL-MAP type */
				proto_tree_add_item(tree, hf_cdlmap_dl_map_type_1, tvb, dl_map_offset, 1, FALSE);
				/* display the reserved */
				proto_tree_add_item(tree, hf_cdlmap_reserved_1, tvb, dl_map_offset, 1, FALSE);
				/* move to next byte */
				dl_map_offset++;
				nibble_offset = 0;
			}
			else
			{	/* display the DL-MAP type */
				proto_tree_add_item(tree, hf_cdlmap_dl_map_type, tvb, dl_map_offset, 1, FALSE);
				/* display the reserved */
				proto_tree_add_item(tree, hf_cdlmap_reserved, tvb, dl_map_offset, 1, FALSE);
				nibble_offset = 1;
			}
			length = 1;
			/* decode RCID IE */
			nibble_length = wimax_compact_dlmap_rcid_ie_decoder(tree, pinfo, tvb, dl_map_offset, nibble_offset);
			length += nibble_length;
			dl_map_offset += (nibble_length >> 1);
			nibble_offset = (nibble_length & 1);
			/* check harq mode */
			if(!harq_mode)
			{	/* display the Nep and Nsch Code */
				if(nibble_offset & 1)
				{
					proto_tree_add_item(tree, hf_cdlmap_nep_code_1, tvb, dl_map_offset, 1, FALSE);
					/* move to next byte */
					dl_map_offset++;
					proto_tree_add_item(tree, hf_cdlmap_nsch_code, tvb, dl_map_offset, 1, FALSE);
				}
				else
				{
					proto_tree_add_item(tree, hf_cdlmap_nep_code, tvb, dl_map_offset, 1, FALSE);
					proto_tree_add_item(tree, hf_cdlmap_nsch_code_1, tvb, dl_map_offset, 1, FALSE);
					/* move to next byte */
					dl_map_offset++;
				}
				length += 2;
			}
			else if(harq_mode == 1)
			{	/* display the Shortened DIUC and Companded SC */
				if(nibble_offset & 1)
				{
					proto_tree_add_item(tree, hf_cdlmap_shortened_diuc_1, tvb, dl_map_offset, 2, FALSE);
					proto_tree_add_item(tree, hf_cdlmap_companded_sc_1, tvb, dl_map_offset, 2, FALSE);
				}
				else
				{
					proto_tree_add_item(tree, hf_cdlmap_shortened_diuc, tvb, dl_map_offset, 1, FALSE);
						proto_tree_add_item(tree, hf_cdlmap_companded_sc, tvb, dl_map_offset, 1, FALSE);
				}
				/* move to next byte */
				dl_map_offset++;
				length += 2;
			}
			/* get the Nband */
			if(max_logical_bands)
			{	/* get and display the Nband */
				nband = tvb_get_guint8(tvb, dl_map_offset);
				if(nibble_offset & 1)
				{
					nband = (nband & LSB_NIBBLE_MASK);
					/* display the Nband */
					proto_tree_add_item(tree, hf_cdlmap_num_bands_1, tvb, dl_map_offset, 1, FALSE);
					/* move to next byte */
					dl_map_offset++;
					nibble_offset = 0;
					if(max_logical_bands == 3)
					{
						proto_tree_add_item(tree, hf_cdlmap_band_index, tvb, dl_map_offset, nband, FALSE);
						length += (nband * 2);
						/* update offset */
						dl_map_offset += nband;
					}
					else
					{
						nibble_offset = (nband & 1);
						proto_tree_add_item(tree, hf_cdlmap_band_index, tvb, dl_map_offset, ((nband >> 1) + nibble_offset), FALSE);
						length += nband;
						/* update offset */
						dl_map_offset += (nband >> 1);
					}
				}
				else
				{
					nband = ((nband & MSB_NIBBLE_MASK) >> 4);
					/* display the Nband */
					proto_tree_add_item(tree, hf_cdlmap_num_bands, tvb, dl_map_offset, 1, FALSE);
					nibble_offset = 1;
					if(max_logical_bands == 3)
					{
						proto_tree_add_item(tree, hf_cdlmap_band_index, tvb, dl_map_offset, (nband + nibble_offset), FALSE);
						length += (nband * 2);
						/* update offset */
						dl_map_offset += nband;
					}
					else
					{
						proto_tree_add_item(tree, hf_cdlmap_band_index, tvb, dl_map_offset, ((nband >> 1) + nibble_offset), FALSE);
						length += nband;
						/* update offset */
						dl_map_offset += ((nband + nibble_offset) >> 1);
						if(nband & 1)
							nibble_offset = 0;
					}
				}
				length++;
				band_count = nband;
			}
			else
			{
				nband = 0;
				band_count = 1;
				/* display the Nb-BITMAP */
				if(nibble_offset & 1)
				{
					proto_tree_add_item(tree, hf_cdlmap_nb_bitmap_1, tvb, dl_map_offset, 1, FALSE);
					/* move to next byte */
					dl_map_offset++;
					nibble_offset = 0;
				}
				else
				{
					proto_tree_add_item(tree, hf_cdlmap_nb_bitmap, tvb, dl_map_offset, 1, FALSE);
					nibble_offset = 1;
				}
				length++;
			}
			/* Get the Allocation Mode */
			byte = tvb_get_guint8(tvb, dl_map_offset);
			if(nibble_offset & 1)
			{
				allocation_mode = ((byte & 0x0C) >> 2);
				proto_tree_add_item(tree, hf_cdlmap_allocation_mode_1, tvb, dl_map_offset, 1, FALSE);
					proto_tree_add_item(tree, hf_cdlmap_allocation_mode_rsvd_1, tvb, dl_map_offset, 1, FALSE);
				nibble_offset = 0;
				dl_map_offset++;
			}
			else
			{
				allocation_mode = ((byte & 0xC0) >> 6);
				proto_tree_add_item(tree, hf_cdlmap_allocation_mode, tvb, dl_map_offset, 1, FALSE);
				proto_tree_add_item(tree, hf_cdlmap_allocation_mode_rsvd, tvb, dl_map_offset, 1, FALSE);
				nibble_offset = 1;
			}
			/* Decode Allocation Mode - need to be done */
			if(!allocation_mode)
			{
				if(nibble_offset & 1)
				{
					proto_tree_add_item(tree, hf_cdlmap_num_subchannels_1, tvb, dl_map_offset, 2, FALSE);
				}
				else
				{
					proto_tree_add_item(tree, hf_cdlmap_num_subchannels, tvb, dl_map_offset, 1, FALSE);
				}
				dl_map_offset++;
			}
			else if(allocation_mode == 1)
			{
				for(i=0; i<band_count; i++)
				{
					if(nibble_offset & 1)
					{
						proto_tree_add_item(tree, hf_cdlmap_num_subchannels_1, tvb, dl_map_offset, 2, FALSE);
					}
					else
					{
						proto_tree_add_item(tree, hf_cdlmap_num_subchannels, tvb, dl_map_offset, 1, FALSE);
					}
					dl_map_offset++;
				}
			}
			/* decode HARQ Control IE */
			nibble_length = wimax_compact_dlmap_harq_control_ie_decoder(tree, pinfo, tvb, dl_map_offset, nibble_offset);
			length += nibble_length;
			dl_map_offset += ((nibble_offset + nibble_length) >> 1);
			nibble_offset = ((nibble_offset + nibble_length) & 1);
			/* decode CQICH Control IE */
			nibble_length = wimax_compact_dlmap_cqich_control_ie_decoder(tree, pinfo, tvb, dl_map_offset, nibble_offset);
			length += nibble_length;
		break;
		case COMPACT_DL_MAP_TYPE_SAFETY:/* 6.3.2.3.43.6.3 */
			if(nibble_offset & 1)
			{	/* display the DL-MAP type */