plugins-wimax-mac_hd_type1_decoder.c

Intel的WIMAX代码,主要是mac层code

	},
	{
		&hf_mac_header_type_1_br_3,
		{
			"Bandwidth Request", "wimax.type1Br3",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_BR_3,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_fb_type,
		{
			"Feedback Type", "wimax.type1FbType",
			FT_UINT24, BASE_HEX, VALS(fb_types), WIMAX_MAC_HEADER_TYPE_1_FB_TYPE,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_diuc,
		{
			"Preferred DIUC Index", "wimax.type1Diuc",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_DIUC,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_ultxpwr,
		{
			"UL TX Power", "wimax.type1UlTxPwr",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_UL_TX_PWR,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_ultxpwr_3,
		{
			"UL TX Power", "wimax.type1UlTxPwr3",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_UL_TX_PWR_3,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_ulhdrm,
		{
			"Headroom to UL Max Power Level", "wimax.type1HdRm",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_UL_HDRM,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_cinr,
		{
			"CINR Value", "wimax.type1Cinr",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_CINR,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_dci,
		{
			"DCD Change Indication", "wimax.type1Dci",
			FT_UINT24, BASE_HEX, VALS(dci_msgs), WIMAX_MAC_HEADER_TYPE_1_DCI,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_pscid,
		{
			"Power Saving Class ID", "wimax.type1PsCid",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_PSCID,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_op,
		{
			"Operation", "wimax.type1Op",
			FT_UINT24, BASE_HEX, VALS(op_msgs), WIMAX_MAC_HEADER_TYPE_1_OP,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_last,
		{
			"Last ARQ BSN or SDU SN", "wimax.type1Last",
			FT_UINT24, BASE_HEX, VALS(last_msgs), WIMAX_MAC_HEADER_TYPE_1_LAST,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_sdu_sn1,
		{
			"ARQ BSN or MAC SDU SN (1)", "wimax.type1SduSn1",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_SDU_SN1,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_sdu_sn2,
		{
			"ARQ BSN or MAC SDU SN (2)", "wimax.type1SduSn2",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_SDU_SN2,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_sdu_sn3,
		{
			"ARQ BSN or MAC SDU SN (3)", "wimax.type1SduSn3",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_SDU_SN3,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_fbssi,
		{
			"FBSS Indicator", "wimax.type1Fbssi",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_FBSSI,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_period,
		{
			"Preferred CQICH Allocation Period", "wimax.type1Period",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_PERIOD,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_rsv_2,
		{
			"Reserved", "wimax.type1Rsv2",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_RSV_2,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_rsv_5,
		{
			"Reserved", "wimax.type1Rsv5",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_RSV_5,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_rsv_7,
		{
			"Reserved", "wimax.type1Rsv7",
			FT_UINT24, BASE_DEC, NULL, WIMAX_MAC_HEADER_TYPE_1_RSV_7,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_cid,
		{
			"Connection ID", "wimax.type1Cid",
			FT_UINT16, BASE_DEC, NULL, 0x0,
			"", HFILL
		}
	},
	{
		&hf_mac_header_type_1_hcs,
		{
			"Header Check Sequence", "wimax.type1Hcs",
			FT_UINT8, BASE_HEX, NULL, 0x0,
			"", HFILL
		}
	}
};

/* Setup protocol subtree array */
static gint *ett[] =
{
	&ett_mac_header_type_1_decoder,
};

/* Register Wimax Mac Header Type II Protocol and Dissector */
void proto_register_mac_header_type_1(void)
{
	if (proto_mac_header_type_1_decoder == -1)
	{
		proto_mac_header_type_1_decoder = proto_mac_header_generic_decoder;

		proto_register_field_array(proto_mac_header_type_1_decoder, hf, array_length(hf));
		proto_register_subtree_array(ett, array_length(ett));
	}
	register_dissector("mac_header_type_1_handler", dissect_mac_header_type_1_decoder, -1);
}

void dissect_mac_header_type_1_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	gint tvb_len, offset = 0;
	guint first_byte, sub_type;
	proto_item *parent_item = NULL;
	proto_item *ti = NULL;
	proto_tree *ti_tree = NULL;

	if (tree)
	{	/* we are being asked for details */
		/* Get the tvb reported length */
		tvb_len =  tvb_reported_length(tvb);
		/* display the MAC Type I Header message */
		ti = proto_tree_add_protocol_format(tree, proto_mac_header_type_1_decoder, tvb, offset, tvb_len, "Mac Type I Header (%u bytes)", WIMAX_MAC_HEADER_SIZE);
		/* add subtree */
		ti_tree = proto_item_add_subtree(ti, ett_mac_header_type_1_decoder);
		if(tvb_len < WIMAX_MAC_HEADER_SIZE)
		{
			/* display the MAC Type I Header in Hex */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_value_bytes, tvb, offset, tvb_len, FALSE);
			return;
		}
#ifdef DEBUG
		/* update the info column */
		if (check_col(pinfo->cinfo, COL_INFO))
		{
			col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, type1_subtype_abbrv[]);
		}
#endif
		/* get the parent */
		parent_item = proto_tree_get_parent(tree);
		/* Decode and display the first 3 bytes of the header */
		proto_tree_add_item(ti_tree, hf_mac_header_type_1_ht, tvb, offset, 3, FALSE);
		proto_tree_add_item(ti_tree, hf_mac_header_type_1_ec, tvb, offset, 3, FALSE);
		proto_tree_add_item(ti_tree, hf_mac_header_type_1_type, tvb, offset, 3, FALSE);
		/* Get the first byte */
		first_byte = tvb_get_guint8(tvb, offset);
		/* get the sub Type */
		sub_type = ((first_byte & WIMAX_MAC_HEADER_TYPE_1_SUB_TYPE_MASK)>>3);
		if(sub_type < TYPE_I_SUBTYPE_MAX)
		{
			/* update the info column */
			if (check_col(pinfo->cinfo, COL_INFO))
				col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, type1_subtype_abbrv[sub_type]);
		}
		else
		{
			/* update the info column */
			if (check_col(pinfo->cinfo, COL_INFO))
				col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Unknown type 1 subtype");
			/* display MAC Header Type I Subtype */
			proto_tree_add_protocol_format(ti_tree, proto_mac_header_type_1_decoder, tvb, offset, tvb_len, "Unknown type 1 subtype: %u", sub_type);
			/* display the MAC Type I Header in Hex */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_value_bytes, tvb, offset, tvb_len, FALSE);
			return;
		}
		/* add the MAC header info */
		proto_item_append_text(parent_item, "%s", type1_subtype_abbrv[sub_type]);
		switch (sub_type)
		{
		case BR_INCREMENTAL:
		case BR_AGGREGATE:
			/* Decode and display the Bandwidth Request */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_br, tvb, offset, 3, FALSE);
		break;
		case PHY_CHANNEL_REPORT:
			/* Decode and display the Preferred-DIUC */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_diuc, tvb, offset, 3, FALSE);
			/* Decode and display the UL TX Power */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_ultxpwr, tvb, offset, 3, FALSE);
			/* Decode and display the UL Headroom */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_ulhdrm, tvb, offset, 3, FALSE);
			/* Decode and display the reserved filed */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_rsv_2, tvb, offset, 3, FALSE);
		break;
		case BR_WITH_UL_TX_POWER_REPORT:
			/* Decode and display the Bandwidth Request */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_br_3, tvb, offset, 3, FALSE);
			/* Decode and display the UL TX Power */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_ultxpwr_3, tvb, offset, 3, FALSE);
		break;
		case BR_AND_CINR_REPORT:
			/* Decode and display the Bandwidth Request */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_br_3, tvb, offset, 3, FALSE);
			/* Decode and display the CINR */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_cinr, tvb, offset, 3, FALSE);
			/* Decode and display the DCD Change Indication */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_dci, tvb, offset, 3, FALSE);
		break;
		case BR_WITH_UL_SLEEP_CONTROL:
			/* Decode and display the Bandwidth Request */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_br_3, tvb, offset, 3, FALSE);
			/* Decode and display the Power Saving Class ID */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_pscid, tvb, offset, 3, FALSE);
			/* Decode and display the Operation */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_op, tvb, offset, 3, FALSE);
			/* Decode and display the reserved filed */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_rsv_5, tvb, offset, 3, FALSE);
		break;
		case SN_REPORT:
			/* Decode and display the Last field */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_last, tvb, offset, 3, FALSE);
			/* Decode and display the SDU SN1 */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_sdu_sn1, tvb, offset, 3, FALSE);
			/* Decode and display the SDU SN2 */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_sdu_sn2, tvb, offset, 3, FALSE);
			/* Decode and display the SDU SN3 */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_sdu_sn3, tvb, offset, 3, FALSE);
		break;
		case CQICH_ALLOCATION_REQUEST:
			/* Decode and display the Feedback Type */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_fb_type, tvb, offset, 3, FALSE);
			/* Decode and display the FBSSI */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_fbssi, tvb, offset, 3, FALSE);
			/* Decode and display the Prreferred-period */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_period, tvb, offset, 3, FALSE);
			/* Decode and display the reserved filed */
			proto_tree_add_item(ti_tree, hf_mac_header_type_1_rsv_7, tvb, offset, 3, FALSE);
		break;
		}
		/* Decode and display the CID */
		proto_tree_add_item(ti_tree, hf_mac_header_type_1_cid, tvb, (offset+3), 2, FALSE);
		/* Decode and display the HCS */
		proto_tree_add_item(ti_tree, hf_mac_header_type_1_hcs, tvb, (offset+5), 1, FALSE);
	}
}



      取自 
      http://anonsvn.wireshark.org/wireshark/trunk 的 
      plugins/wimax/mac_hd_type1_decoder.c - LGPL - C