diff options
Diffstat (limited to 'epan/dissectors/packet-eigrp.c')
| -rw-r--r-- | epan/dissectors/packet-eigrp.c | 509 |
1 files changed, 509 insertions, 0 deletions
diff --git a/epan/dissectors/packet-eigrp.c b/epan/dissectors/packet-eigrp.c new file mode 100644 index 0000000000..70138f71b2 --- /dev/null +++ b/epan/dissectors/packet-eigrp.c @@ -0,0 +1,509 @@ +/* packet-eigrp.c + * Routines for EIGRP dissection + * Copyright 2000, Paul Ionescu <paul@acorp.ro> + * + * $Id$ + * + * 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 <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); +} |