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wireshark/packet-eigrp.c

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/* packet-eigrp.c
* Routines for EIGRP dissection
* Copyright 2000, Paul Ionescu <paul@acorp.ro>
*
* $Id: packet-eigrp.c,v 1.27 2004/03/06 03:25:09 guy Exp $
*
* 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 <glib.h>
#include <epan/packet.h>
#include <epan/resolv.h>
#include <epan/atalk-utils.h>
#include <epan/addr_and_mask.h>
#include "ipproto.h"
#include "packet-ipx.h"
/*
* See
*
* http://www.rhyshaden.com/eigrp.htm
*/
#define EIGRP_UPDATE 0x01
#define EIGRP_REQUEST 0x02
#define EIGRP_QUERY 0x03
#define EIGRP_REPLY 0x04
#define EIGRP_HELLO 0x05
#define EIGRP_SAP 0x06
#define EIGRP_HI 0x20 /* This value is for my own need to make a difference between Hello and Ack */
#define EIGRP_ACK 0x40 /* This value is for my own need to make a difference between Hello and Ack */
#define TLV_PAR 0x0001
#define TLV_AUTH 0x0002
#define TLV_SEQ 0x0003
#define TLV_SV 0x0004
#define TLV_NMS 0x0005
#define TLV_IP_INT 0x0102
#define TLV_IP_EXT 0x0103
#define TLV_AT_INT 0x0202
#define TLV_AT_EXT 0x0203
#define TLV_AT_CBL 0x0204
#define TLV_IPX_INT 0x0302
#define TLV_IPX_EXT 0x0303
#define EIGRP_HEADER_LENGTH 20
static gint proto_eigrp = -1;
static gint hf_eigrp_opcode = -1;
static gint hf_eigrp_as = -1;
static gint hf_eigrp_tlv = -1;
static gint ett_eigrp = -1;
static gint ett_tlv = -1;
static dissector_handle_t ipxsap_handle;
static const value_string eigrp_opcode_vals[] = {
{ EIGRP_HELLO, "Hello/Ack" },
{ EIGRP_UPDATE, "Update" },
{ EIGRP_REPLY, "Reply" },
{ EIGRP_QUERY, "Query" },
{ EIGRP_REQUEST, "Request" },
{ EIGRP_SAP, "IPX/SAP Update" },
{ EIGRP_HI, "Hello" },
{ EIGRP_ACK, "Acknowledge" },
{ 0, NULL }
};
static const value_string eigrp_tlv_vals[] = {
{ TLV_PAR, "EIGRP Parameters"},
{ TLV_AUTH, "Authentication data"},
{ TLV_SEQ , "Sequence"},
{ TLV_SV, "Software Version"},
{ TLV_NMS , "Next multicast sequence"},
{ TLV_IP_INT, "IP internal route"},
{ TLV_IP_EXT, "IP external route"},
{ TLV_AT_INT, "AppleTalk internal route"},
{ TLV_AT_EXT, "AppleTalk external route"},
{ TLV_AT_CBL, "AppleTalk cable configuration"},
{ TLV_IPX_INT, "IPX internal route"},
{ TLV_IPX_EXT, "IPX external route"},
{ 0, NULL}
};
static const value_string eigrp_pid_vals[] = {
{ 1, "IGRP"},
{ 2, "EIGRP"},
{ 3, "Static Route"},
{ 4, "RIP"},
{ 5, "Hello"},
{ 6, "OSPF"},
{ 7, "IS-IS"},
{ 8, "EGP"},
{ 9, "BGP"},
{ 10, "IDRP"},
{ 11, "Connected link"},
{ 0, NULL}
};
static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree);
static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree);
static void dissect_eigrp_sv (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
static void
dissect_eigrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
proto_tree *eigrp_tree,*tlv_tree;
proto_item *ti;
guint opcode,opcode_tmp;
guint16 tlv,size, offset = EIGRP_HEADER_LENGTH;
guint32 ack;
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "EIGRP");
if (check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
opcode_tmp=opcode=tvb_get_guint8(tvb,1);
ack = tvb_get_ntohl(tvb,12);
if (opcode==EIGRP_HELLO) { if (ack == 0) opcode_tmp=EIGRP_HI; else opcode_tmp=EIGRP_ACK; }
if (check_col(pinfo->cinfo, COL_INFO))
col_add_str(pinfo->cinfo, COL_INFO,
val_to_str(opcode_tmp , eigrp_opcode_vals, "Unknown (0x%04x)"));
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_eigrp, tvb, 0, -1,
"Cisco EIGRP");
eigrp_tree = proto_item_add_subtree(ti, ett_eigrp);
proto_tree_add_text (eigrp_tree, tvb, 0,1,"Version = %u",tvb_get_guint8(tvb,0)) ;
proto_tree_add_uint_format (eigrp_tree, hf_eigrp_opcode, tvb, 1,1,opcode,"Opcode = %u (%s)",opcode,val_to_str(opcode_tmp,eigrp_opcode_vals, "Unknown")) ;
proto_tree_add_text (eigrp_tree, tvb, 2,2,"Checksum = 0x%04x",tvb_get_ntohs(tvb,2)) ;
proto_tree_add_text (eigrp_tree, tvb, 4,4,"Flags = 0x%08x",tvb_get_ntohl(tvb,4)) ;
proto_tree_add_text (eigrp_tree, tvb, 8,4,"Sequence = %u",tvb_get_ntohl(tvb,8)) ;
proto_tree_add_text (eigrp_tree, tvb, 12,4,"Acknowledge = %u",tvb_get_ntohl(tvb,12)) ;
proto_tree_add_uint (eigrp_tree, hf_eigrp_as, tvb, 16,4,tvb_get_ntohl(tvb,16)) ;
if (opcode==EIGRP_SAP)
{
call_dissector(ipxsap_handle, tvb_new_subset(tvb, EIGRP_HEADER_LENGTH, -1, -1), pinfo, eigrp_tree);
return;
}
while ( tvb_reported_length_remaining(tvb,offset)>0 ) {
tlv = tvb_get_ntohs(tvb,offset);
size = tvb_get_ntohs(tvb,offset+2);
if ( size == 0 )
{
proto_tree_add_text(eigrp_tree,tvb,offset,-1,"Unknown data (maybe authentication)");
return;
}
ti = proto_tree_add_text (eigrp_tree, tvb, offset,size,
"%s",val_to_str(tlv, eigrp_tlv_vals, "Unknown (0x%04x)"));
tlv_tree = proto_item_add_subtree (ti, ett_tlv);
proto_tree_add_uint_format (tlv_tree,hf_eigrp_tlv, tvb,offset,2,tlv,"Type = 0x%04x (%s)",tlv,val_to_str(tlv,eigrp_tlv_vals, "Unknown")) ;
proto_tree_add_text (tlv_tree,tvb,offset+2,2,"Size = %u bytes",size) ;
switch (tlv){
case TLV_PAR:
dissect_eigrp_par(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree);
break;
case TLV_SEQ:
dissect_eigrp_seq(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree);
break;
case TLV_SV:
dissect_eigrp_sv(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
break;
case TLV_NMS:
dissect_eigrp_nms(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
break;
case TLV_IP_INT:
dissect_eigrp_ip_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
break;
case TLV_IP_EXT:
dissect_eigrp_ip_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
break;
case TLV_IPX_INT:
dissect_eigrp_ipx_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
break;
case TLV_IPX_EXT:
dissect_eigrp_ipx_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
break;
case TLV_AT_CBL:
dissect_eigrp_at_cbl(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
break;
case TLV_AT_INT:
dissect_eigrp_at_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
break;
case TLV_AT_EXT:
dissect_eigrp_at_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
break;
case TLV_AUTH:
proto_tree_add_text(tlv_tree,tvb,offset+4,size-4,"Authentication data");
break;
}
offset+=size;
}
}
}
static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree) {
proto_tree_add_text (tree,tvb,0,1,"K1 = %u",tvb_get_guint8(tvb,0));
proto_tree_add_text (tree,tvb,1,1,"K2 = %u",tvb_get_guint8(tvb,1));
proto_tree_add_text (tree,tvb,2,1,"K3 = %u",tvb_get_guint8(tvb,2));
proto_tree_add_text (tree,tvb,3,1,"K4 = %u",tvb_get_guint8(tvb,3));
proto_tree_add_text (tree,tvb,4,1,"K5 = %u",tvb_get_guint8(tvb,4));
proto_tree_add_text (tree,tvb,5,1,"Reserved");
proto_tree_add_text (tree,tvb,6,2,"Hold Time = %u",tvb_get_ntohs(tvb,6));
}
static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree)
{ guint8 addr_len;
addr_len=tvb_get_guint8(tvb,0);
proto_tree_add_text (tree,tvb,0,1,"Address length = %u",addr_len);
switch (addr_len){
case 4:
proto_tree_add_text (tree,tvb,1,addr_len,"IP Address = %u.%u.%u.%u",tvb_get_guint8(tvb,1),tvb_get_guint8(tvb,2),tvb_get_guint8(tvb,3),tvb_get_guint8(tvb,4));
break;
case 10:
proto_tree_add_text (tree,tvb,1,addr_len,"IPX Address = %08x.%04x.%04x.%04x",tvb_get_ntohl(tvb,1),tvb_get_ntohs(tvb,5),tvb_get_ntohs(tvb,7),tvb_get_ntohs(tvb,9));
break;
default:
/* nothing */
;
}
}
static void dissect_eigrp_sv (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
{
guint8 ios_rel_major, ios_rel_minor;
guint8 eigrp_rel_major, eigrp_rel_minor;
ios_rel_major = tvb_get_guint8(tvb,0);
ios_rel_minor = tvb_get_guint8(tvb,1);
proto_tree_add_text (tree,tvb,0,2," IOS release version = %u.%u",
ios_rel_major, ios_rel_minor);
proto_item_append_text (ti,": IOS=%u.%u", ios_rel_major, ios_rel_minor);
eigrp_rel_major = tvb_get_guint8(tvb,2);
eigrp_rel_minor = tvb_get_guint8(tvb,3);
proto_tree_add_text (tree,tvb,2,2,"EIGRP release version = %u.%u",
eigrp_rel_major, eigrp_rel_minor);
proto_item_append_text (ti,", EIGRP=%u.%u",
eigrp_rel_major, eigrp_rel_minor);
}
static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
{
proto_tree_add_text (tree,tvb,0,4,"Next Multicast Sequence = %u",tvb_get_ntohl(tvb,0));
proto_item_append_text (ti,": %u",tvb_get_ntohl(tvb,0));
}
static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
{
guint8 ip_addr[4],length;
int addr_len;
tvb_memcpy(tvb,ip_addr,0,4);
proto_tree_add_text (tree,tvb,0,4, "Next Hop = %s",ip_to_str(ip_addr));
proto_tree_add_text (tree,tvb,4,4, "Delay = %u",tvb_get_ntohl(tvb,4));
proto_tree_add_text (tree,tvb,8,4, "Bandwidth = %u",tvb_get_ntohl(tvb,8));
proto_tree_add_text (tree,tvb,12,3,"MTU = %u",tvb_get_ntoh24(tvb,12));
proto_tree_add_text (tree,tvb,15,1,"Hop Count = %u",tvb_get_guint8(tvb,15));
proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
proto_tree_add_text (tree,tvb,17,1,"Load = %u",tvb_get_guint8(tvb,17));
proto_tree_add_text (tree,tvb,18,2,"Reserved ");
length=tvb_get_guint8(tvb,20);
/* XXX - the EIGRP page whose URL appears at the top says this
field is 24 bits; what if the prefix length is > 24? */
addr_len=ipv4_addr_and_mask (tvb,21,ip_addr,length);
if (addr_len < 0) {
proto_tree_add_text (tree,tvb,20,1,"Prefix length = %u (invalid, must be <= 32)",length);
proto_item_append_text (ti," [Invalid prefix length %u > 32]",length);
} else {
proto_tree_add_text (tree,tvb,20,1,"Prefix Length = %u",length);
proto_tree_add_text (tree,tvb,21,addr_len,"Destination = %s",ip_to_str(ip_addr));
proto_item_append_text (ti," = %s/%u%s",ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,4)==0xffffffff)?" - Destination unreachable":""));
}
}
static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
{
guint8 ip_addr[4],length;
int addr_len;
tvb_memcpy(tvb,ip_addr,0,4);
proto_tree_add_text (tree,tvb,0,4,"Next Hop = %s",ip_to_str(ip_addr));
tvb_memcpy(tvb,ip_addr,4,4);
proto_tree_add_text (tree,tvb,4,4,"Originating router = %s",ip_to_str(ip_addr));
proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
proto_tree_add_text (tree,tvb,16,4,"External protocol metric = %u",tvb_get_ntohl(tvb,16));
proto_tree_add_text (tree,tvb,20,2,"Reserved");
proto_tree_add_text (tree,tvb,22,1,"External protocol ID = %u (%s)",tvb_get_guint8(tvb,22),val_to_str(tvb_get_guint8(tvb,22),eigrp_pid_vals, "Unknown"));
proto_tree_add_text (tree,tvb,23,1,"Flags = 0x%0x",tvb_get_guint8(tvb,23));
proto_tree_add_text (tree,tvb,24,4,"Delay = %u",tvb_get_ntohl(tvb,24));
proto_tree_add_text (tree,tvb,28,4,"Bandwidth = %u",tvb_get_ntohl(tvb,28));
proto_tree_add_text (tree,tvb,32,3,"MTU = %u",tvb_get_ntoh24(tvb,32));
proto_tree_add_text (tree,tvb,35,1,"Hop Count = %u",tvb_get_guint8(tvb,35));
proto_tree_add_text (tree,tvb,36,1,"Reliability = %u",tvb_get_guint8(tvb,36));
proto_tree_add_text (tree,tvb,37,1,"Load = %u",tvb_get_guint8(tvb,37));
proto_tree_add_text (tree,tvb,38,2,"Reserved ");
length=tvb_get_guint8(tvb,40);
/* XXX - the EIGRP page whose URL appears at the top says this
field is 24 bits; what if the prefix length is > 24? */
addr_len=ipv4_addr_and_mask (tvb,41,ip_addr,length);
if (addr_len < 0) {
proto_tree_add_text (tree,tvb,40,1,"Prefix length = %u (invalid, must be <= 32)",length);
proto_item_append_text (ti," [Invalid prefix length %u > 32]",length);
} else {
proto_tree_add_text (tree,tvb,40,1,"Prefix Length = %u",length);
proto_tree_add_text (tree,tvb,41,addr_len,"Destination = %s",ip_to_str(ip_addr));
proto_item_append_text (ti," = %s/%u%s",ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,4)==0xffffffff)?" - Destination unreachable":""));
}
}
static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
{
proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
proto_tree_add_text (tree,tvb,4,6,"Next Hop ID = %04x:%04x:%04x",tvb_get_ntohs(tvb,4),tvb_get_ntohs(tvb,6),tvb_get_ntohs(tvb,8));
proto_tree_add_text (tree,tvb,10,4,"Delay = %u",tvb_get_ntohl(tvb,10));
proto_tree_add_text (tree,tvb,14,4,"Bandwidth = %u",tvb_get_ntohl(tvb,14));
proto_tree_add_text (tree,tvb,18,3,"MTU = %u",tvb_get_ntoh24(tvb,18));
proto_tree_add_text (tree,tvb,21,1,"Hop Count = %u",tvb_get_guint8(tvb,21));
proto_tree_add_text (tree,tvb,22,1,"Reliability = %u",tvb_get_guint8(tvb,22));
proto_tree_add_text (tree,tvb,23,1,"Load = %u",tvb_get_guint8(tvb,23));
proto_tree_add_text (tree,tvb,24,2,"Reserved ");
proto_tree_add_text (tree,tvb,26,4,"Destination Address = %08x",tvb_get_ntohl(tvb,26));
proto_item_append_text (ti," = %08x%s",tvb_get_ntohl(tvb,26),((tvb_get_ntohl(tvb,10)==0xffffffff)?" - Destination unreachable":""));
}
static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
{
proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
proto_tree_add_text (tree,tvb,4,6,"Next Hop ID = %04x:%04x:%04x",tvb_get_ntohs(tvb,4),tvb_get_ntohs(tvb,6),tvb_get_ntohs(tvb,8));
proto_tree_add_text (tree,tvb,10,6,"Originating router ID = %04x:%04x:%04x",tvb_get_ntohs(tvb,10),tvb_get_ntohs(tvb,12),tvb_get_ntohs(tvb,14));
proto_tree_add_text (tree,tvb,16,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,16));
proto_tree_add_text (tree,tvb,20,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,20));
proto_tree_add_text (tree,tvb,24,1,"External protocol = %u",tvb_get_guint8(tvb,24));
proto_tree_add_text (tree,tvb,25,1,"Reserved");
proto_tree_add_text (tree,tvb,26,2,"External metric = %u ",tvb_get_ntohs(tvb,26));
proto_tree_add_text (tree,tvb,28,2,"External delay = %u ",tvb_get_ntohs(tvb,28));
proto_tree_add_text (tree,tvb,30,4,"Delay = %u",tvb_get_ntohl(tvb,30));
proto_tree_add_text (tree,tvb,34,4,"Bandwidth = %u",tvb_get_ntohl(tvb,34));
proto_tree_add_text (tree,tvb,38,3,"MTU = %u",tvb_get_ntoh24(tvb,38));
proto_tree_add_text (tree,tvb,41,1,"Hop Count = %u",tvb_get_guint8(tvb,41));
proto_tree_add_text (tree,tvb,42,1,"Reliability = %u",tvb_get_guint8(tvb,42));
proto_tree_add_text (tree,tvb,43,1,"Load = %u",tvb_get_guint8(tvb,43));
proto_tree_add_text (tree,tvb,44,2,"Reserved ");
proto_tree_add_text (tree,tvb,46,4,"Destination Address = %08x",tvb_get_ntohl(tvb,46));
proto_item_append_text (ti," = %08x%s",tvb_get_ntohl(tvb,46),((tvb_get_ntohl(tvb,30)==0xffffffff)?" - Destination unreachable":""));
}
static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
{
proto_tree_add_text (tree,tvb,0,4,"AppleTalk Cable Range = %u-%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
proto_tree_add_text (tree,tvb,4,4,"AppleTalk Router ID = %u",tvb_get_ntohl(tvb,4));
proto_item_append_text (ti,": Cable range= %u-%u, Router ID= %u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2),tvb_get_ntohl(tvb,4));
}
static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
{
proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
proto_tree_add_text (tree,tvb,4,4,"Delay = %u",tvb_get_ntohl(tvb,4));
proto_tree_add_text (tree,tvb,8,4,"Bandwidth = %u",tvb_get_ntohl(tvb,8));
proto_tree_add_text (tree,tvb,12,3,"MTU = %u",tvb_get_ntoh24(tvb,12));
proto_tree_add_text (tree,tvb,15,1,"Hop Count = %u",tvb_get_guint8(tvb,15));
proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
proto_tree_add_text (tree,tvb,17,1,"Load = %u",tvb_get_guint8(tvb,17));
proto_tree_add_text (tree,tvb,18,2,"Reserved ");
proto_tree_add_text (tree,tvb,20,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
proto_item_append_text (ti,": %u-%u",tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
}
static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
{
proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
proto_tree_add_text (tree,tvb,4,4,"Originating router ID = %u",tvb_get_ntohl(tvb,4));
proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
proto_tree_add_text (tree,tvb,16,1,"External protocol ID = %u ",tvb_get_guint8(tvb,16));
proto_tree_add_text (tree,tvb,17,1,"Flags = 0x%0x",tvb_get_guint8(tvb,17));
proto_tree_add_text (tree,tvb,18,2,"External protocol metric = %u",tvb_get_ntohs(tvb,18));
proto_tree_add_text (tree,tvb,20,4,"Delay = %u",tvb_get_ntohl(tvb,20));
proto_tree_add_text (tree,tvb,24,4,"Bandwidth = %u",tvb_get_ntohl(tvb,24));
proto_tree_add_text (tree,tvb,28,3,"MTU = %u",tvb_get_ntoh24(tvb,28));
proto_tree_add_text (tree,tvb,31,1,"Hop Count = %u",tvb_get_guint8(tvb,31));
proto_tree_add_text (tree,tvb,32,1,"Reliability = %u",tvb_get_guint8(tvb,32));
proto_tree_add_text (tree,tvb,33,1,"Load = %u",tvb_get_guint8(tvb,33));
proto_tree_add_text (tree,tvb,34,2,"Reserved ");
proto_tree_add_text (tree,tvb,36,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
proto_item_append_text (ti,": %u-%u",tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
}
void
proto_register_eigrp(void)
{
static hf_register_info hf[] = {
{ &hf_eigrp_opcode,
{ "Opcode", "eigrp.opcode",
FT_UINT8, BASE_DEC, NULL, 0x0 ,
"Opcode number", HFILL }
},
{ &hf_eigrp_as,
{ "Autonomous System ", "eigrp.as",
FT_UINT16, BASE_DEC, NULL, 0x0 ,
"Autonomous System number", HFILL }
},
{ &hf_eigrp_tlv,
{ "Entry ", "eigrp.tlv",
FT_UINT16, BASE_DEC, NULL, 0x0 ,
"Type/Length/Value", HFILL }
},
};
static gint *ett[] = {
&ett_eigrp,
&ett_tlv,
};
proto_eigrp = proto_register_protocol("Enhanced Interior Gateway Routing Protocol",
"EIGRP", "eigrp");
proto_register_field_array(proto_eigrp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_eigrp(void)
{
dissector_handle_t eigrp_handle;
ipxsap_handle = find_dissector("ipxsap");
eigrp_handle = create_dissector_handle(dissect_eigrp, proto_eigrp);
dissector_add("ip.proto", IP_PROTO_EIGRP, eigrp_handle);
dissector_add("ddp.type", DDP_EIGRP, eigrp_handle);
dissector_add("ipx.socket", IPX_SOCKET_EIGRP, eigrp_handle);
}
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