path: root/plugins/docsis/packet-dcd.c

/* packet-dcd.c
 * Routines for DCD Message dissection
 * Copyright 2004, Darryl Hymel <darryl.hymel[AT]arrisi.com>
 *
 * $Id$
 *
 * Ethereal - Network traffic analyzer
 * By Gerald Combs <gerald@ethereal.com>
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif


#include "moduleinfo.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <gmodule.h>

#include <epan/packet.h>

#define DCD_DOWN_CLASSIFIER 23
#define DCD_DSG_RULE 50
#define DCD_DSG_CONFIG 51

/* Define Downstrean Classifier subtypes
 * These are subtype of DCD_DOWN_CLASSIFIER (23)
 */

#define DCD_CFR_ID 2
#define DCD_CFR_RULE_PRI 5
#define DCD_CFR_IP_CLASSIFIER 9

/* Define IP Classifier sub-subtypes
 * These are subtypes of DCD_CFR_IP_CLASSIFIER (23.9)
 */
#define DCD_CFR_IP_SOURCE_ADDR 3
#define DCD_CFR_IP_SOURCE_MASK 4
#define DCD_CFR_IP_DEST_ADDR 5
#define DCD_CFR_IP_DEST_MASK 6
#define DCD_CFR_TCPUDP_SRCPORT_START 7
#define DCD_CFR_TCPUDP_SRCPORT_END 8
#define DCD_CFR_TCPUDP_DSTPORT_START 9
#define DCD_CFR_TCPUDP_DSTPORT_END 10

/* Define DSG Rule subtypes
 * These are subtype of DCD_DSG_RULE (50)
 */

#define DCD_RULE_ID 1
#define DCD_RULE_PRI 2
#define DCD_RULE_UCID_RNG 3
#define DCD_RULE_CLIENT_ID 4
#define DCD_RULE_TUNL_ADDR 5
#define DCD_RULE_CFR_ID 6
#define DCD_RULE_VENDOR_SPEC 43
/* Define DSG Rule Client ID sub-subtypes
 * These are subtypes of DCD_RULE_CLIENT_ID (50.4)
 */
#define DCD_CLID_BCAST_ID 1
#define DCD_CLID_KNOWN_MAC_ADDR 2
#define DCD_CLID_CA_SYS_ID 3
#define DCD_CLID_APP_ID 4

/* Define DSG Configuration subtypes
 * These are subtype of DCD_DSG_CONFIG (51)
 */

#define DCD_CFG_CHAN_LST 1
#define DCD_CFG_TDSG1 2
#define DCD_CFG_TDSG2 3
#define DCD_CFG_TDSG3 4
#define DCD_CFG_TDSG4 5
#define DCD_CFG_VENDOR_SPEC 43

/* Initialize the protocol and registered fields */
static int proto_docsis_dcd = -1;

static int hf_docsis_dcd_config_ch_cnt = -1;
static int hf_docsis_dcd_num_of_frag = -1;
static int hf_docsis_dcd_frag_sequence_num = -1;
static int hf_docsis_dcd_cfr_id = -1;
static int hf_docsis_dcd_cfr_rule_pri = -1;
static int hf_docsis_dcd_cfr_ip_source_addr = -1;
static int hf_docsis_dcd_cfr_ip_source_mask = -1;
static int hf_docsis_dcd_cfr_ip_dest_addr = -1;
static int hf_docsis_dcd_cfr_ip_dest_mask = -1;
static int hf_docsis_dcd_cfr_tcpudp_srcport_start = -1;
static int hf_docsis_dcd_cfr_tcpudp_srcport_end = -1;
static int hf_docsis_dcd_cfr_tcpudp_dstport_start = -1;
static int hf_docsis_dcd_cfr_tcpudp_dstport_end = -1;
static int hf_docsis_dcd_rule_id = -1;
static int hf_docsis_dcd_rule_pri = -1;
static int hf_docsis_dcd_rule_ucid_list = -1;
static int hf_docsis_dcd_clid_known_mac_addr = -1;
static int hf_docsis_dcd_clid_ca_sys_id = -1;
static int hf_docsis_dcd_clid_app_id = -1;
static int hf_docsis_dcd_rule_tunl_addr = -1;
static int hf_docsis_dcd_rule_cfr_id = -1;
static int hf_docsis_dcd_rule_vendor_spec = -1;
static int hf_docsis_dcd_cfg_chan = -1;
static int hf_docsis_dcd_cfg_tdsg1 = -1;
static int hf_docsis_dcd_cfg_tdsg2 = -1;
static int hf_docsis_dcd_cfg_tdsg3 = -1;
static int hf_docsis_dcd_cfg_tdsg4 = -1;
static int hf_docsis_dcd_cfg_vendor_spec = -1;

/* Initialize the subtree pointers */
static gint ett_docsis_dcd = -1;
static gint ett_docsis_dcd_cfr = -1;
static gint ett_docsis_dcd_cfr_ip = -1;
static gint ett_docsis_dcd_rule = -1;
static gint ett_docsis_dcd_clid = -1;
static gint ett_docsis_dcd_cfg = -1;

/* Code to actually dissect the packets */
static void
dissect_dcd_dsg_cfg (tvbuff_t * tvb, proto_tree * tree, int start, guint16 len)
{
  guint8 type, length;
  proto_item *dcd_item;
  proto_tree *dcd_tree;
  int pos;
   
  pos = start;
  dcd_item = proto_tree_add_text ( tree, tvb, start, len, "51 DCD DSG Config Encodings (Length = %u)", len);
  dcd_tree = proto_item_add_subtree ( dcd_item , ett_docsis_dcd_cfg);
  
  while ( pos < ( start + len) ) 
    {
	type = tvb_get_guint8 (tvb, pos++);
	length = tvb_get_guint8 (tvb, pos++);
	
	switch (type)
	  {
	    case DCD_CFG_CHAN_LST:
	      if (length == 4)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfg_chan, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CFG_TDSG1:
	      if (length == 2)
		{
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfg_tdsg1, tvb,
				   pos, length, FALSE);
		}
              else 
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CFG_TDSG2:
	      if (length == 2)
		{
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfg_tdsg2, tvb,
				   pos, length, FALSE);
		}
              else 
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CFG_TDSG3:
	      if (length == 2)
		{
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfg_tdsg3, tvb,
				   pos, length, FALSE);
		}
              else 
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CFG_TDSG4:
	      if (length == 2)
		{
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfg_tdsg4, tvb,
				   pos, length, FALSE);
		}
              else 
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CFG_VENDOR_SPEC:
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfg_vendor_spec, tvb,
				   pos, length, FALSE);
	      break;

	    }
	  pos = pos + length;
      }
}
static void
dissect_dcd_down_classifier_ip (tvbuff_t * tvb, proto_tree * tree, int start, guint16 len)
{
  guint8 type, length;
  proto_item *dcd_item;
  proto_tree *dcd_tree;
  int pos;
   
  pos = start;
  dcd_item = proto_tree_add_text ( tree, tvb, start, len, "23.9 DCD_CFR_IP Encodings (Length = %u)", len);
  dcd_tree = proto_item_add_subtree ( dcd_item , ett_docsis_dcd_cfr_ip);
  
  while ( pos < ( start + len) ) 
    {
	type = tvb_get_guint8 (tvb, pos++);
	length = tvb_get_guint8 (tvb, pos++);
	
	switch (type)
	  {
	    case DCD_CFR_IP_SOURCE_ADDR:
	      if (length == 4)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfr_ip_source_addr, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CFR_IP_SOURCE_MASK:
	      if (length == 4)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfr_ip_source_mask, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CFR_IP_DEST_ADDR:
	      if (length == 4)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfr_ip_dest_addr, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
		break;
	    case DCD_CFR_IP_DEST_MASK:
	      if (length == 4)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfr_ip_dest_mask, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
		break;
	    case DCD_CFR_TCPUDP_SRCPORT_START:
	      if (length == 2)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfr_tcpudp_srcport_start, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
		break;
	    case DCD_CFR_TCPUDP_SRCPORT_END:
	      if (length == 2)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfr_tcpudp_srcport_end, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
		break;
	    case DCD_CFR_TCPUDP_DSTPORT_START:
	      if (length == 2)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfr_tcpudp_dstport_start, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
		break;
	    case DCD_CFR_TCPUDP_DSTPORT_END:
	      if (length == 2)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfr_tcpudp_dstport_end, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
		break;
	    }
	  pos = pos + length;
      }
}
static void
dissect_dcd_clid (tvbuff_t * tvb, proto_tree * tree, int start, guint16 len)
{
  guint8 type, length;
  proto_item *dcd_item;
  proto_tree *dcd_tree;
  int pos;
   
  pos = start;
  dcd_item = proto_tree_add_text ( tree, tvb, start, len, "50.4 DCD Rule ClientID Encodings (Length = %u)", len);
  dcd_tree = proto_item_add_subtree ( dcd_item , ett_docsis_dcd_clid);
  
  while ( pos < ( start + len) ) 
    {
	type = tvb_get_guint8 (tvb, pos++);
	length = tvb_get_guint8 (tvb, pos++);
	
	switch (type)
	  {
	    case DCD_CLID_KNOWN_MAC_ADDR:
	      if (length == 6)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_clid_known_mac_addr, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CLID_CA_SYS_ID:
	      if (length == 2)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_clid_ca_sys_id, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CLID_APP_ID:
	      if (length == 2)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_clid_app_id, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
		break;
	    }
	  pos = pos + length;
      }
}
static void
dissect_dcd_dsg_rule (tvbuff_t * tvb, proto_tree * tree, int start, guint16 len)
{
  guint8 type, length;
  proto_item *dcd_item;
  proto_tree *dcd_tree;
  int pos;
   
  pos = start;
  dcd_item = proto_tree_add_text ( tree, tvb, start, len, "50 DCD DSG Rule Encodings (Length = %u)", len);
  dcd_tree = proto_item_add_subtree ( dcd_item , ett_docsis_dcd_rule);
  
  while ( pos < ( start + len) ) 
    {
	type = tvb_get_guint8 (tvb, pos++);
	length = tvb_get_guint8 (tvb, pos++);
	
	switch (type)
	  {
	    case DCD_RULE_ID:
	      if (length == 1)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_rule_id, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_RULE_PRI:
	      if (length == 1)
		{
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_rule_pri, tvb,
				   pos, length, FALSE);
		}
              else 
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_RULE_UCID_RNG:
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_rule_ucid_list, tvb,
				   pos, length, FALSE);
	      break;
	    case DCD_RULE_CLIENT_ID:
	      dissect_dcd_clid (tvb , dcd_tree , pos , length );
	      break;
	    case DCD_RULE_TUNL_ADDR:
	      if (length == 6)
		{
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_rule_tunl_addr, tvb,
				   pos, length, FALSE);
		}
              else 
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_RULE_CFR_ID:
	      if (length == 2)
		{
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_rule_cfr_id, tvb,
				   pos, length, FALSE);
		}
              else 
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_RULE_VENDOR_SPEC:
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_rule_vendor_spec, tvb,
				   pos, length, FALSE);
	      break;

	    }
	  pos = pos + length;
      }
}
static void
dissect_dcd_down_classifier (tvbuff_t * tvb, proto_tree * tree, int start, guint16 len)
{
  guint8 type, length;
  proto_item *dcd_item;
  proto_tree *dcd_tree;
  int pos;
   
  pos = start;
  dcd_item = proto_tree_add_text ( tree, tvb, start, len, "23 DCD_CFR Encodings (Length = %u)", len);
  dcd_tree = proto_item_add_subtree ( dcd_item , ett_docsis_dcd_cfr);
  
  while ( pos < ( start + len) ) 
    {
	type = tvb_get_guint8 (tvb, pos++);
	length = tvb_get_guint8 (tvb, pos++);
	
	switch (type)
	  {
	    case DCD_CFR_ID:
	      if (length == 2)
		{
		  proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfr_id, tvb,
				       pos, length, FALSE);
		}
	      else
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CFR_RULE_PRI:
	      if (length == 1)
		{
	          proto_tree_add_item (dcd_tree, hf_docsis_dcd_cfr_rule_pri, tvb,
				   pos, length, FALSE);
		}
              else 
		{
		  THROW (ReportedBoundsError);
		}
	      break;
	    case DCD_CFR_IP_CLASSIFIER:
	      dissect_dcd_down_classifier_ip (tvb , dcd_tree , pos , length );
	      break;

	    }
	  pos = pos + length;
      }
}
static void
dissect_dcd (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
  guint16 pos;
  guint8 type, length;
  proto_tree *dcd_tree;
  proto_item *dcd_item;
  guint16 len;

  len = tvb_length_remaining (tvb, 0);

  if (check_col (pinfo->cinfo, COL_INFO))
    {
      col_clear (pinfo->cinfo, COL_INFO);
      col_add_fstr (pinfo->cinfo, COL_INFO,"DCD Message: ");
    }

  if (tree)
    {
      dcd_item =
	proto_tree_add_protocol_format (tree, proto_docsis_dcd, tvb, 0,
					tvb_length_remaining (tvb, 0),
					"DCD Message");
      dcd_tree = proto_item_add_subtree (dcd_item, ett_docsis_dcd);
      proto_tree_add_item (dcd_tree, hf_docsis_dcd_config_ch_cnt, tvb, 0, 1, FALSE);
      proto_tree_add_item (dcd_tree, hf_docsis_dcd_num_of_frag, tvb, 1, 1, FALSE);
      proto_tree_add_item (dcd_tree, hf_docsis_dcd_frag_sequence_num, tvb, 2, 1, FALSE);

      pos = 3;
      while (pos < len)
	{
	  type = tvb_get_guint8 (tvb, pos++);
	  length = tvb_get_guint8 (tvb, pos++);
	  switch (type)
	    {
	    case DCD_DOWN_CLASSIFIER:
	      dissect_dcd_down_classifier (tvb , dcd_tree , pos , length );
	      break;
	    case DCD_DSG_RULE:
	      dissect_dcd_dsg_rule (tvb , dcd_tree , pos , length );
	      break;
	    case DCD_DSG_CONFIG:
	      dissect_dcd_dsg_cfg (tvb , dcd_tree , pos , length );
	      break;
	    }			/* switch(type) */
	  pos = pos + length;
	}			/* while (pos < len) */
    }				/* if (tree) */

}
/* Register the protocol with Ethereal */

/* this format is require because a script is used to build the C function
   that calls all the protocol registration.
*/


void
proto_register_docsis_dcd (void)
{
/* Setup list of header fields  See Section 1.6.1 for details*/
  static hf_register_info hf[] = {
    {&hf_docsis_dcd_config_ch_cnt,
      {
      "Configuration Change Count", 
      "docsis.dcd.config_ch_cnt",
      FT_UINT8, BASE_DEC, NULL, 0x0,
      "Configuration Change Count", 
      HFILL
      }
    },
    {&hf_docsis_dcd_num_of_frag,
      {
      "Number of Fragments", 
      "docsis.dcd.num_of_frag",
      FT_UINT8, BASE_DEC, NULL, 0x0,
      "Number of Fragments", 
      HFILL
      }
    },
    {&hf_docsis_dcd_frag_sequence_num,
      {
      "Fragment Sequence Number", 
      "docsis.dcd.frag_sequence_num",
      FT_UINT8, BASE_DEC, NULL, 0x0,
      "Fragment Sequence Number", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfr_id,
      {
      "Downstream Classifier Id", 
      "docsis.dcd.cfr_id",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "Downstream Classifier Id", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfr_rule_pri,
      {
      "Downstream Classifier Rule Priority", 
      "docsis.dcd.cfr_rule_pri",
      FT_UINT8, BASE_DEC, NULL, 0x0,
      "Downstream Classifier Rule Priority", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfr_ip_source_addr,
      {
      "Downstream Classifier IP Source Address", 
      "docsis.dcd.cfr_ip_source_addr",
      FT_IPv4, BASE_DEC, NULL, 0x0,
      "Downstream Classifier IP Source Address", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfr_ip_source_mask,
      {
      "Downstream Classifier IP Source Mask", 
      "docsis.dcd.cfr_ip_source_mask",
      FT_IPv4, BASE_DEC, NULL, 0x0,
      "Downstream Classifier IP Source Mask", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfr_ip_dest_addr,
      {
      "Downstream Classifier IP Destination Address", 
      "docsis.dcd.cfr_ip_dest_addr",
      FT_IPv4, BASE_DEC, NULL, 0x0,
      "Downstream Classifier IP Destination Address", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfr_ip_dest_mask,
      {
      "Downstream Classifier IP Destination Mask", 
      "docsis.dcd.cfr_ip_dest_mask",
      FT_IPv4, BASE_DEC, NULL, 0x0,
      "Downstream Classifier IP Destination Address", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfr_tcpudp_srcport_start,
      {
      "Downstream Classifier IP TCP/UDP Source Port Start", 
      "docsis.dcd.cfr_ip_tcpudp_srcport_start",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "Downstream Classifier IP TCP/UDP Source Port Start", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfr_tcpudp_srcport_end,
      {
      "Downstream Classifier IP TCP/UDP Source Port End", 
      "docsis.dcd.cfr_ip_tcpudp_srcport_end",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "Downstream Classifier IP TCP/UDP Source Port End", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfr_tcpudp_dstport_start,
      {
      "Downstream Classifier IP TCP/UDP Destination Port Start", 
      "docsis.dcd.cfr_ip_tcpudp_dstport_start",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "Downstream Classifier IP TCP/UDP Destination Port Start", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfr_tcpudp_dstport_end,
      {
      "Downstream Classifier IP TCP/UDP Destination Port End", 
      "docsis.dcd.cfr_ip_tcpudp_dstport_end",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "Downstream Classifier IP TCP/UDP Destination Port End", 
      HFILL
      }
    },
    {&hf_docsis_dcd_rule_id,
      {
      "DSG Rule Id ", 
      "docsis.dcd.rule_id",
      FT_UINT8, BASE_DEC, NULL, 0x0,
      "DSG Rule Id ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_rule_pri,
      {
      "DSG Rule Priority ", 
      "docsis.dcd.rule_pri",
      FT_UINT8, BASE_DEC, NULL, 0x0,
      "DSG Rule Priority ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_rule_ucid_list,
      {
      "DSG Rule UCID Range ", 
      "docsis.dcd.rule_ucid_list",
      FT_BYTES, BASE_HEX, NULL, 0x0,
      "DSG Rule UCID Range ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_clid_known_mac_addr,
      {
      "DSG Rule Client ID Known MAC Address ", 
      "docsis.dcd.clid_known_mac_addr",
      FT_ETHER, BASE_DEC, NULL, 0x0,
      "DSG Rule Client ID Known MAC Address ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_clid_ca_sys_id,
      {
      "DSG Rule Client ID CA System ID ", 
      "docsis.dcd.clid_ca_sys_id",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "DSG Rule Client ID CA System ID ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_clid_app_id,
      {
      "DSG Rule Client ID Application ID ", 
      "docsis.dcd.clid_app_id",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "DSG Rule Client ID Application ID ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_rule_tunl_addr,
      {
      "DSG Rule Tunnel MAC Address ", 
      "docsis.dcd.rule_tunl_addr",
      FT_ETHER, BASE_DEC, NULL, 0x0,
      "DSG Rule Tunnel MAC Address ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_rule_cfr_id,
      {
      "DSG Rule Classifier ID", 
      "docsis.dcd.rule_cfr_id",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "DSG Rule Classifier ID", 
      HFILL
      }
    },
    {&hf_docsis_dcd_rule_vendor_spec,
      {
      "DSG Rule Vendor Specific Parameters", 
      "docsis.dcd.rule_vendor_spec",
      FT_BYTES, BASE_HEX, NULL, 0x0,
      "DSG Rule Vendor Specific Parameters", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfg_chan,
      {
      "DSG Configuration Channel", 
      "docsis.dcd.cfg_chan",
      FT_UINT32, BASE_DEC, NULL, 0x0,
      "DSG Configuration Channel", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfg_tdsg1,
      {
      "DSG Initialization Timeout (Tdsg1) ", 
      "docsis.dcd.cfg_tdsg1",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "DSG Initialization Timeout (Tdsg1) ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfg_tdsg2,
      {
      "DSG Operational Timeout (Tdsg2) ", 
      "docsis.dcd.cfg_tdsg2",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "DSG Operational Timeout (Tdsg2) ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfg_tdsg3,
      {
      "DSG Two-Way Retry Timer (Tdsg3) ", 
      "docsis.dcd.cfg_tdsg3",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "DSG Two-Way Retry Timer (Tdsg3) ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfg_tdsg4,
      {
      "DSG One-Way Retry Timer (Tdsg4) ", 
      "docsis.dcd.cfg_tdsg4",
      FT_UINT16, BASE_DEC, NULL, 0x0,
      "DSG One-Way Retry Timer (Tdsg4) ", 
      HFILL
      }
    },
    {&hf_docsis_dcd_cfg_vendor_spec,
      {
      "DSG Configuration Vendor Specific Parameters", 
      "docsis.dcd.cfg_vendor_spec",
      FT_BYTES, BASE_HEX, NULL, 0x0,
      "DSG Configuration Vendor Specific Parameters", 
      HFILL
      }
    },

  };

/* Setup protocol subtree array */
  static gint *ett[] = {
    &ett_docsis_dcd,
    &ett_docsis_dcd_cfr,
    &ett_docsis_dcd_cfr_ip,
    &ett_docsis_dcd_rule,
    &ett_docsis_dcd_clid,
    &ett_docsis_dcd_cfg,
  };

/* Register the protocol name and description */
  proto_docsis_dcd =
    proto_register_protocol ("DOCSIS Downstream Channel Descriptor ",
			     "DOCSIS DCD", "docsis_dcd");

/* Required function calls to register the header fields and subtrees used */
  proto_register_field_array (proto_docsis_dcd, hf, array_length (hf));
  proto_register_subtree_array (ett, array_length (ett));

  register_dissector ("docsis_dcd", dissect_dcd, proto_docsis_dcd);
}


/* If this dissector uses sub-dissector registration add a registration routine.
   This format is required because a script is used to find these routines and
   create the code that calls these routines.
*/
void
proto_reg_handoff_docsis_dcd (void)
{
  dissector_handle_t docsis_dcd_handle;

  docsis_dcd_handle = find_dissector ("docsis_dcd");
  dissector_add ("docsis_mgmt", 0x20, docsis_dcd_handle);

}