[Jochen Friedrich <jochen@xxxxxxxx>]

Hi,

this version of the zebra dissector is adapted to the protocol changes of
the upcoming zebra 0.88. It will no longer dissect older versions of zebra
protocol as the protocol doesn't have any kind of version information.
I hope the protocol will now be stable until zebra version 1.0...

Cheers,
Jochen

/* packet-zebra.c
 * Routines for zebra packet disassembly
 *
 * Jochen Friedrich <jochen@xxxxxxxx>
 *
 * $Id:$
 *
 * Ethereal - Network traffic analyzer
 * By Gerald Combs <gerald@xxxxxxxx>
 * 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

#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif

#include <string.h>
#include <ctype.h>

#include <glib.h>
#include "packet.h"

static int proto_zebra = -1;
static int hf_zebra_len = -1;
static int hf_zebra_command = -1;
static int hf_zebra_request = -1;
static int hf_zebra_interface = -1;
static int hf_zebra_index = -1;
static int hf_zebra_indexnum = -1;
static int hf_zebra_type = -1;
static int hf_zebra_intflags = -1;
static int hf_zebra_rtflags = -1;
static int hf_zebra_distance = -1;
static int hf_zebra_metric = -1;
static int hf_zebra_mtu = -1;
static int hf_zebra_bandwidth = -1;
static int hf_zebra_family = -1;
static int hf_zebra_message = -1;
static int hf_zebra_msg_nexthop = -1;
static int hf_zebra_msg_index = -1;
static int hf_zebra_msg_distance = -1;
static int hf_zebra_msg_metric = -1;
static int hf_zebra_nexthopnum = -1;
static int hf_zebra_nexthop4 = -1;
static int hf_zebra_nexthop6 = -1;
static int hf_zebra_dest4 = -1;
static int hf_zebra_dest6 = -1;
static int hf_zebra_prefixlen = -1;
static int hf_zebra_prefix4 = -1;
static int hf_zebra_prefix6 = -1;

static gint ett_zebra = -1;
static gint ett_zebra_request = -1;
static gint ett_message = -1;

#define TCP_PORT_ZEBRA			2600

/* Zebra message types. */
#define ZEBRA_INTERFACE_ADD                1
#define ZEBRA_INTERFACE_DELETE             2
#define ZEBRA_INTERFACE_ADDRESS_ADD        3
#define ZEBRA_INTERFACE_ADDRESS_DELETE     4
#define ZEBRA_INTERFACE_UP                 5
#define ZEBRA_INTERFACE_DOWN               6
#define ZEBRA_IPV4_ROUTE_ADD               7
#define ZEBRA_IPV4_ROUTE_DELETE            8
#define ZEBRA_IPV6_ROUTE_ADD               9
#define ZEBRA_IPV6_ROUTE_DELETE           10
#define ZEBRA_REDISTRIBUTE_ADD            11
#define ZEBRA_REDISTRIBUTE_DELETE         12
#define ZEBRA_REDISTRIBUTE_DEFAULT_ADD    13
#define ZEBRA_REDISTRIBUTE_DEFAULT_DELETE 14
#define ZEBRA_IPV4_NEXTHOP_LOOKUP         15
#define ZEBRA_IPV6_NEXTHOP_LOOKUP         16

static const value_string messages[] = {
	{ ZEBRA_INTERFACE_ADD,			"Add Interface" },
	{ ZEBRA_INTERFACE_DELETE,		"Delete Interface" },
	{ ZEBRA_INTERFACE_ADDRESS_ADD,		"Add Interface Address" },
	{ ZEBRA_INTERFACE_ADDRESS_DELETE,	"Delete Interface Address" },
	{ ZEBRA_INTERFACE_UP,			"Interface Up" },
	{ ZEBRA_INTERFACE_DOWN,			"Interface Down" },
	{ ZEBRA_IPV4_ROUTE_ADD,			"Add IPv4 Route" },
	{ ZEBRA_IPV4_ROUTE_DELETE,		"Delete IPv4 Route" },
	{ ZEBRA_IPV6_ROUTE_ADD,			"Add IPv6 Route" },
	{ ZEBRA_IPV6_ROUTE_DELETE,		"Delete IPv6 Route" },
	{ ZEBRA_REDISTRIBUTE_ADD,		"Add Redistribute" },
	{ ZEBRA_REDISTRIBUTE_DELETE,		"Delete Redistribute" },
	{ ZEBRA_REDISTRIBUTE_DEFAULT_ADD,	"Add Default Redistribute" },
	{ ZEBRA_REDISTRIBUTE_DEFAULT_DELETE,	"Delete Default Redistribute" },
	{ ZEBRA_IPV4_NEXTHOP_LOOKUP,		"IPv4 Nexthop Lookup" },
	{ ZEBRA_IPV6_NEXTHOP_LOOKUP,		"IPv6 Nexthop Lookup" },
	{ 0,					NULL },
};

/* Zebra route's types. */
#define ZEBRA_ROUTE_SYSTEM               0
#define ZEBRA_ROUTE_KERNEL               1
#define ZEBRA_ROUTE_CONNECT              2
#define ZEBRA_ROUTE_STATIC               3
#define ZEBRA_ROUTE_RIP                  4
#define ZEBRA_ROUTE_RIPNG                5
#define ZEBRA_ROUTE_OSPF                 6
#define ZEBRA_ROUTE_OSPF6                7
#define ZEBRA_ROUTE_BGP                  8

static const value_string routes[] = {
	{ ZEBRA_ROUTE_SYSTEM,			"System Route" },
	{ ZEBRA_ROUTE_KERNEL,			"Kernel Route" },
	{ ZEBRA_ROUTE_CONNECT,			"Connected Route" },
	{ ZEBRA_ROUTE_STATIC,			"Static Route" },
	{ ZEBRA_ROUTE_RIP,			"RIP Route" },
	{ ZEBRA_ROUTE_RIPNG,			"RIPnG Route" },
	{ ZEBRA_ROUTE_OSPF,			"OSPF Route" },
	{ ZEBRA_ROUTE_OSPF6,			"OSPF6 Route" },
	{ ZEBRA_ROUTE_BGP,			"BGP Route" },
	{ 0,					NULL },
};

/* Zebra's family types. */
#define ZEBRA_FAMILY_IPV4                1
#define ZEBRA_FAMILY_IPV6                2

static const value_string families[] = {
	{ ZEBRA_FAMILY_IPV4,			"IPv4" },
	{ ZEBRA_FAMILY_IPV6,			"IPv6" },
	{ 0,					NULL },
};

/* Error codes of zebra. */
#define ZEBRA_ERR_RTEXIST                1
#define ZEBRA_ERR_RTUNREACH              2
#define ZEBRA_ERR_EPERM                  3
#define ZEBRA_ERR_RTNOEXIST              4

static const value_string errors[] = {
	{ ZEBRA_ERR_RTEXIST,			"Route Exists" },
	{ ZEBRA_ERR_RTUNREACH,			"Route Unreachable" },
	{ ZEBRA_ERR_EPERM,			"Permission Denied" },
	{ ZEBRA_ERR_RTNOEXIST,			"Route Does Not Exist" },
	{ 0,					NULL },
};

/* Zebra message flags */
#define ZEBRA_FLAG_INTERNAL           0x01
#define ZEBRA_FLAG_SELFROUTE          0x02
#define ZEBRA_FLAG_BLACKHOLE          0x04

/* Subsequent Address Family Identifier. */
#define ZEBRA_SAFI_UNICAST               1
#define ZEBRA_SAFI_MULTICAST             2
#define ZEBRA_SAFI_UNICAST_MULTICAST     3
#define ZEBRA_SAFI_MPLS_VPN              4

static const value_string safis[] = {
	{ ZEBRA_SAFI_UNICAST,			"Unicast" },
	{ ZEBRA_SAFI_MULTICAST,			"Multicast" },
	{ ZEBRA_SAFI_UNICAST_MULTICAST,		"Unicast And Multicast" },
	{ ZEBRA_SAFI_MPLS_VPN,			"MPLS VPN" },
	{ 0,					NULL },
};

/* Zebra API message flag. */
#define ZEBRA_ZAPI_MESSAGE_NEXTHOP    0x01
#define ZEBRA_ZAPI_MESSAGE_IFINDEX    0x02
#define ZEBRA_ZAPI_MESSAGE_DISTANCE   0x04
#define ZEBRA_ZAPI_MESSAGE_METRIC     0x08

#define INTERFACE_NAMSIZ      20

#define PSIZE(a) (((a) + 7) / (8))

void
dissect_zebra_request(proto_tree *tree, gboolean request, tvbuff_t *tvb,
	int offset, guint16 len, guint8 command)
{
	guint32	prefix4;
	guint16 i;
	guint8  buffer6[16], prefixlen, message;
	gpointer prefix, ptr;
	proto_item *ti;
	proto_tree *msg_tree;

	proto_tree_add_uint(tree, hf_zebra_len, tvb, offset, 2, len);
	offset += 2;
	proto_tree_add_uint(tree, hf_zebra_command, tvb, offset, 1,
		command);
	offset += 1;
	switch(command) {
		case ZEBRA_INTERFACE_ADD:
		case ZEBRA_INTERFACE_UP:
		case ZEBRA_INTERFACE_DOWN:
			if (request) break;
			/* Request just subscribes to messages */

			proto_tree_add_string(tree, hf_zebra_interface, 
				tvb, offset, INTERFACE_NAMSIZ, 
				tvb_get_ptr(tvb, offset, INTERFACE_NAMSIZ));
			offset += INTERFACE_NAMSIZ;

			proto_tree_add_item(tree, hf_zebra_index, tvb,
				 offset, 4, FALSE);
			offset += 4;

			proto_tree_add_item(tree, hf_zebra_intflags, tvb,
				 offset, 4, FALSE);
			offset += 4;
			
			proto_tree_add_item(tree, hf_zebra_metric, tvb,
				 offset, 4, FALSE);
			offset += 4;

			proto_tree_add_item(tree, hf_zebra_mtu, tvb,
				 offset, 4, FALSE);
			offset += 4;

			proto_tree_add_item(tree, hf_zebra_bandwidth, tvb,
				 offset, 4, FALSE);
			offset += 4;

			break;
		case ZEBRA_INTERFACE_DELETE:
			proto_tree_add_string(tree, hf_zebra_interface,
				tvb, offset, INTERFACE_NAMSIZ,
				tvb_get_ptr(tvb, offset, INTERFACE_NAMSIZ));
			offset += INTERFACE_NAMSIZ;

			proto_tree_add_item(tree, hf_zebra_index, tvb,
				 offset, 4, FALSE);
			offset += 4;
			break;
		case ZEBRA_INTERFACE_ADDRESS_ADD:
		case ZEBRA_INTERFACE_ADDRESS_DELETE:
			proto_tree_add_item(tree, hf_zebra_index, tvb,
				 offset, 4, FALSE);
			offset += 4;

			proto_tree_add_item(tree, hf_zebra_family, tvb,
				 offset, 1, FALSE);
			offset += 1;

			if (len == 17) { /* IPv4 */
				proto_tree_add_item(tree, hf_zebra_prefix4,
					tvb, offset, 4, FALSE);
				offset += 4;
			}
			else if (len == 41) { /* IPv6 */
				proto_tree_add_item(tree, hf_zebra_prefix6,
					tvb, offset, 16, FALSE);
				offset += 16;
			}
			else break;

			proto_tree_add_item(tree, hf_zebra_prefixlen, tvb,
				 offset, 1, FALSE);
			offset += 1;

			if (len == 17) { /* IPv4 */
				proto_tree_add_item(tree, hf_zebra_dest4,
					tvb, offset, 4, FALSE);
				offset += 4;
			}
			else if (len == 41) { /* IPv6 */
				proto_tree_add_item(tree, hf_zebra_dest6,
					tvb, offset, 16, FALSE);
				offset += 16;
			}
			break;

		case ZEBRA_IPV4_ROUTE_ADD:
		case ZEBRA_IPV4_ROUTE_DELETE:
			proto_tree_add_item(tree, hf_zebra_type, tvb,
				 offset, 1, FALSE);
			offset += 1;

			proto_tree_add_item(tree, hf_zebra_rtflags, tvb,
				 offset, 1, FALSE);
			offset += 1;

			message = tvb_get_guint8(tvb, offset);
			ti = proto_tree_add_uint(tree, hf_zebra_message, tvb,
				 offset, 1, message);
			msg_tree = proto_item_add_subtree(ti, ett_message);
			proto_tree_add_boolean(msg_tree, hf_zebra_msg_nexthop,
				tvb, offset, 1, message);
			proto_tree_add_boolean(msg_tree, hf_zebra_msg_index,
				tvb, offset, 1, message);
			proto_tree_add_boolean(msg_tree, hf_zebra_msg_distance,
				tvb, offset, 1, message);
			proto_tree_add_boolean(msg_tree, hf_zebra_msg_metric,
				tvb, offset, 1, message);
			offset += 1;

			prefixlen = tvb_get_guint8(tvb, offset);
			proto_tree_add_uint(tree, hf_zebra_prefixlen, tvb,
				 offset, 1, prefixlen);
			offset += 1;

			prefix = tvb_get_ptr(tvb, offset, PSIZE(prefixlen));
			prefix4 = 0;
			ptr = (gpointer) &prefix4;
			for (i=0; i< PSIZE(prefixlen); i++)
				*(guint8*)ptr++ = *(guint8*)prefix++;
			proto_tree_add_ipv4(tree, hf_zebra_prefix4,
				tvb, offset, PSIZE(prefixlen), prefix4);
			offset += PSIZE(prefixlen);

			if (message & ZEBRA_ZAPI_MESSAGE_NEXTHOP) {
				i = tvb_get_guint8(tvb, offset);
				proto_tree_add_uint(tree, hf_zebra_nexthopnum,
					tvb, offset, 1, i);
				offset += 1;

				if (i>len) break; /* Sanity */

				while (i--) {
					proto_tree_add_item(tree,
						hf_zebra_nexthop4, tvb,
						offset, 4, FALSE);
					offset += 4;
				}
			}
			if (message & ZEBRA_ZAPI_MESSAGE_IFINDEX) {
				i = tvb_get_guint8(tvb, offset);
				proto_tree_add_uint(tree, hf_zebra_indexnum,
					tvb, offset, 1, i);
				offset += 1;

				if (i>len) break; /* Sanity */

				while (i--) {
					proto_tree_add_item(tree,
						hf_zebra_index, tvb,
						offset, 4, FALSE);
					offset += 4;
				}
			}
			if (message & ZEBRA_ZAPI_MESSAGE_DISTANCE) {
				proto_tree_add_item(tree, hf_zebra_distance,
					tvb, offset, 1, FALSE);
				offset += 1;
			}
			if (message & ZEBRA_ZAPI_MESSAGE_METRIC) {
				proto_tree_add_item(tree, hf_zebra_metric,
					tvb, offset, 4, FALSE);
				offset += 4;
			}
			break;
		case ZEBRA_IPV6_ROUTE_ADD:
		case ZEBRA_IPV6_ROUTE_DELETE:
			proto_tree_add_item(tree, hf_zebra_type, tvb,
				 offset, 1, FALSE);
			offset += 1;

			proto_tree_add_item(tree, hf_zebra_rtflags, tvb,
				 offset, 1, FALSE);
			offset += 1;

			message = tvb_get_guint8(tvb, offset);
			ti = proto_tree_add_uint(tree, hf_zebra_message, tvb,
				 offset, 1, message);
			msg_tree = proto_item_add_subtree(ti, ett_message);
			proto_tree_add_boolean(msg_tree, hf_zebra_msg_nexthop,
				tvb, offset, 1, message);
			proto_tree_add_boolean(msg_tree, hf_zebra_msg_index,
				tvb, offset, 1, message);
			proto_tree_add_boolean(msg_tree, hf_zebra_msg_distance,
				tvb, offset, 1, message);
			proto_tree_add_boolean(msg_tree, hf_zebra_msg_metric,
				tvb, offset, 1, message);
			offset += 1;

			prefixlen = tvb_get_guint8(tvb, offset);
			proto_tree_add_uint(tree, hf_zebra_prefixlen, tvb,
				 offset, 1, prefixlen);
			offset += 1;

			prefix = tvb_get_ptr(tvb, offset, PSIZE(prefixlen));
			for (i=0; i < 16; i++) buffer6[i] = 0;
			ptr = (gpointer) buffer6;
			for (i=0; i< PSIZE(prefixlen); i++)
				*(guint8*)ptr++ = *(guint8*)prefix++;
			proto_tree_add_ipv6(tree, hf_zebra_prefix6,
				tvb, offset, PSIZE(prefixlen), buffer6);
			offset += PSIZE(prefixlen);

			if (message & ZEBRA_ZAPI_MESSAGE_NEXTHOP) {
				i = tvb_get_guint8(tvb, offset);
				proto_tree_add_uint(tree, hf_zebra_nexthopnum,
					tvb, offset, 1, i);
				offset += 1;

				if (i>len) break; /* Sanity */

				while (i--) {
					proto_tree_add_item(tree,
						hf_zebra_nexthop6, tvb,
						offset, 16, FALSE);
					offset += 16;
				}
			}
			if (message & ZEBRA_ZAPI_MESSAGE_IFINDEX) {
				i = tvb_get_guint8(tvb, offset);
				proto_tree_add_uint(tree, hf_zebra_indexnum,
					tvb, offset, 1, i);
				offset += 1;

				if (i>len) break; /* Sanity */

				while (i--) {
					proto_tree_add_item(tree,
						hf_zebra_index, tvb,
						offset, 4, FALSE);
					offset += 4;
				}
			}
			if (message & ZEBRA_ZAPI_MESSAGE_DISTANCE) {
				proto_tree_add_item(tree, hf_zebra_distance,
					tvb, offset, 1, FALSE);
				offset += 1;
			}
			if (message & ZEBRA_ZAPI_MESSAGE_METRIC) {
				proto_tree_add_item(tree, hf_zebra_metric,
					tvb, offset, 4, FALSE);
				offset += 4;
			}
			break;
		case ZEBRA_REDISTRIBUTE_ADD:
		case ZEBRA_REDISTRIBUTE_DELETE:
			proto_tree_add_item(tree, hf_zebra_type, tvb,
				 offset, 1, FALSE);
			offset += 1;
			break;
		case ZEBRA_REDISTRIBUTE_DEFAULT_ADD:
		case ZEBRA_REDISTRIBUTE_DEFAULT_DELETE:
			break;
		case ZEBRA_IPV4_NEXTHOP_LOOKUP:
			proto_tree_add_item(tree, hf_zebra_nexthop4,
				tvb, offset, 4, FALSE);
			offset += 4;

			proto_tree_add_item(tree, hf_zebra_metric,
				tvb, offset, 4, FALSE);
			offset += 4;
			break;
		case ZEBRA_IPV6_NEXTHOP_LOOKUP:
			/* Not yet implemeted in ZEBRA */
			break;
	}
}
		
void
dissect_zebra(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	proto_item	*ti;
	proto_tree	*zebra_tree;
	gboolean	request;
	int		left, offset;

	if (check_col(pinfo->fd, COL_PROTOCOL))
		col_add_str(pinfo->fd, COL_PROTOCOL, "ZEBRA");

	request = (pi.destport == TCP_PORT_ZEBRA);
	left = tvb_reported_length(tvb);
	offset = 0;

	if (check_col(pinfo->fd, COL_INFO)) {
		col_add_str(pinfo->fd, COL_INFO, 
			request? "ZEBRA Request" : "ZEBRA Reply");
	}
	if (tree) {
		ti = proto_tree_add_item(tree, proto_zebra, tvb, offset,
			END_OF_FRAME, FALSE);
		zebra_tree = proto_item_add_subtree(ti, ett_zebra);
		proto_tree_add_boolean_hidden(zebra_tree, hf_zebra_request,
			tvb, offset, END_OF_FRAME, request);

		for (;;) {
			guint8		command;
			guint16		len;
			proto_tree	*zebra_request_tree;
			
			if (left < 3) break;

			len = tvb_get_ntohs(tvb, offset);
			if (len < 3) break;

			command = tvb_get_guint8(tvb, offset+2);

			ti = proto_tree_add_uint(zebra_tree,
				hf_zebra_command, tvb, offset, len,
				command);
			zebra_request_tree = proto_item_add_subtree(ti,
				ett_zebra_request);
			dissect_zebra_request(zebra_request_tree, request, tvb,
				offset, len, command);

			offset += len;
			left -= len;
		}
	}
}

void
proto_register_zebra(void)
{

  static hf_register_info hf[] = {
    { &hf_zebra_len,
      { "Length",		"zebra.len",
	FT_UINT16, BASE_DEC, NULL, 0x0,
	"Length of ZEBRA request" }},
    { &hf_zebra_request,
      { "Request",		"zebra.request",
	FT_BOOLEAN, BASE_NONE, NULL, 0x0,
	"TRUE if ZEBRA request" }},
    { &hf_zebra_command,
      { "Command",		"zebra.command",
	FT_UINT8, BASE_DEC, VALS(messages), 0x0,
	"ZEBRA command" }},
    { &hf_zebra_interface,
      { "Interface",		"zebra.interface",
	FT_STRING, BASE_NONE, NULL, 0x0,
	"Interface name of ZEBRA request" }},
    { &hf_zebra_index,
      { "Index",		"zebra.index",
	FT_UINT32, BASE_DEC, NULL, 0x0,
	"Index of interface" }},
    { &hf_zebra_indexnum,
      { "Index Number",		"zebra.indexnum",
	FT_UINT8, BASE_DEC, NULL, 0x0,
	"Number of indices for route" }},
    { &hf_zebra_intflags,
      { "Flags",		"zebra.intflags",
	FT_UINT32, BASE_DEC, NULL, 0x0,
	"Flags of interface" }},
    { &hf_zebra_rtflags,
      { "Flags",		"zebra.rtflags",
	FT_UINT8, BASE_DEC, NULL, 0x0,
	"Flags of route" }},
    { &hf_zebra_message,
      { "Message",		"zebra.message",
	FT_UINT8, BASE_DEC, NULL, 0x0,
	"Message type of route" }},
    { &hf_zebra_msg_nexthop,
      { "Message Nexthop",	"zebra.message.nexthop",
	FT_BOOLEAN, 8, NULL, ZEBRA_ZAPI_MESSAGE_NEXTHOP,
	"Message contains nexthop" }},
    { &hf_zebra_msg_index,
      { "Message Index",	"zebra.message.index",
	FT_BOOLEAN, 8, NULL, ZEBRA_ZAPI_MESSAGE_IFINDEX,
	"Message contains index" }},
    { &hf_zebra_msg_distance,
      { "Message Distance",	"zebra.message.distance",
	FT_BOOLEAN, 8, NULL, ZEBRA_ZAPI_MESSAGE_DISTANCE,
	"Message contains distance" }},
    { &hf_zebra_msg_metric,
      { "Message Metric",	"zebra.message.metric",
	FT_BOOLEAN, 8, NULL, ZEBRA_ZAPI_MESSAGE_METRIC,
	"Message contains metric" }},
    { &hf_zebra_type,
      { "Type",			"zebra.type",
	FT_UINT8, BASE_DEC, VALS(routes), 0x0,
	"Type of route" }},
    { &hf_zebra_distance,
      { "Distance",		"zebra.distance",
	FT_UINT8, BASE_DEC, NULL, 0x0,
	"Distance of route" }},
    { &hf_zebra_metric,
      { "Metric",		"zebra.metric",
	FT_UINT32, BASE_DEC, NULL, 0x0,
	"Metric of interface or route" }},
    { &hf_zebra_mtu,
      { "MTU",			"zebra.mtu",
	FT_UINT32, BASE_DEC, NULL, 0x0,
	"MTU of interface" }},
    { &hf_zebra_bandwidth,
      { "Bandwidth",		"zebra.bandwidth",
	FT_UINT32, BASE_DEC, NULL, 0x0,
	"Bandwidth of interface" }},
    { &hf_zebra_family,
      { "Family",		"zebra.family",
	FT_UINT32, BASE_DEC, NULL, 0x0,
	"Family of IP address" }},
    { &hf_zebra_dest4,
      { "Destination",		"zebra.dest4",
	FT_IPv4, BASE_NONE, NULL, 0x0,
	"Destination IPv4 field" }},
    { &hf_zebra_dest6,
      { "Destination",		"zebra.dest6",
	FT_IPv6, BASE_NONE, NULL, 0x0,
	"Destination IPv6 field" }},
    { &hf_zebra_nexthopnum,
      { "Nexthop Number",	"zebra.nexthopnum",
	FT_UINT8, BASE_NONE, NULL, 0x0,
	"Number of nexthops in route" }},
    { &hf_zebra_nexthop4,
      { "Nexthop",		"zebra.nexthop4",
	FT_IPv4, BASE_NONE, NULL, 0x0,
	"Nethop IPv4 field of route" }},
    { &hf_zebra_nexthop6,
      { "Nexthop",		"zebra.nexthop6",
	FT_IPv6, BASE_NONE, NULL, 0x0,
	"Nethop IPv6 field of route" }},
    { &hf_zebra_prefixlen,
      { "Prefix length",	"zebra.prefixlen",
	FT_UINT32, BASE_DEC, NULL, 0x0,
	"Prefix length" }},
    { &hf_zebra_prefix4,
      { "Prefix",		"zebra.prefix4",
	FT_IPv4, BASE_NONE, NULL, 0x0,
	"Prefix IPv4" }},
    { &hf_zebra_prefix6,
      { "Prefix",		"zebra.prefix6",
	FT_IPv6, BASE_NONE, NULL, 0x0,
	"Prefix IPv6" }},
  };

  static gint *ett[] = {
    &ett_zebra,
    &ett_zebra_request,
    &ett_message,
  };

  proto_zebra = proto_register_protocol("Zebra Protocol", "zebra");
  proto_register_field_array(proto_zebra, hf, array_length(hf));
  proto_register_subtree_array(ett, array_length(ett));
}

void
proto_reg_handoff_zebra(void)
{
  dissector_add("tcp.port", TCP_PORT_ZEBRA, dissect_zebra);
}