/* packet-eigrp.c * Routines for EIGRP dissection * Copyright 2000, Paul Ionescu * * $Id: packet-eigrp.c,v 1.25 2002/08/28 21:00:13 jmayer Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs * 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 #include #include #include #include "ipproto.h" #include "packet-ipx.h" #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,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); proto_tree_add_text (tree,tvb,20,1,"Prefix Length = %u",length); if (length % 8 == 0) addr_len=length/8 ; else addr_len=length/8+1; ip_addr[0]=ip_addr[1]=ip_addr[2]=ip_addr[3]=0; tvb_memcpy(tvb,ip_addr,21,addr_len); 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,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); proto_tree_add_text (tree,tvb,40,1,"Prefix Length = %u",length); if (length % 8 == 0) addr_len=length/8 ; else addr_len=length/8+1; ip_addr[0]=ip_addr[1]=ip_addr[2]=ip_addr[3]=0; tvb_memcpy(tvb,ip_addr,41,addr_len); 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,24)==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); }