The hash table merely associates data structures with conversations,
[obnox/wireshark/wip.git] / packet-eigrp.c
1 /* packet-eigrp.c
2  * Routines for EIGRP dissection
3  * Copyright 2000, Paul Ionescu <paul@acorp.ro>
4  *
5  * $Id: packet-eigrp.c,v 1.17 2001/06/18 02:17:46 guy Exp $
6  *
7  * Ethereal - Network traffic analyzer
8  * By Gerald Combs <gerald@ethereal.com>
9  * Copyright 1998 Gerald Combs
10  *
11  * 
12  * This program is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU General Public License
14  * as published by the Free Software Foundation; either version 2
15  * of the License, or (at your option) any later version.
16  * 
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  * 
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
25  */
26
27 #ifdef HAVE_CONFIG_H
28 # include "config.h"
29 #endif
30
31 #ifdef HAVE_SYS_TYPES_H
32 # include <sys/types.h>
33 #endif
34
35 #ifdef HAVE_NETINET_IN_H
36 # include <netinet/in.h>
37 #endif
38
39 #include <glib.h>
40 #include "packet.h"
41 #include "resolv.h"
42
43 #include "atalk-utils.h"
44 #include "ipproto.h"
45 #include "packet-ipx.h"
46
47 #define EIGRP_UPDATE    0x01
48 #define EIGRP_REQUEST   0x02
49 #define EIGRP_QUERY     0x03
50 #define EIGRP_REPLY     0x04
51 #define EIGRP_HELLO     0x05
52 #define EIGRP_SAP       0x06
53 #define EIGRP_HI        0x20  /* This value is for my own need to make a difference between Hello and Ack */
54 #define EIGRP_ACK       0x40  /* This value is for my own need to make a difference between Hello and Ack */
55
56 #define TLV_PAR         0x0001
57 #define TLV_AUTH        0x0002
58 #define TLV_SEQ         0x0003
59 #define TLV_SV          0x0004
60 #define TLV_NMS         0x0005
61 #define TLV_IP_INT      0x0102
62 #define TLV_IP_EXT      0x0103
63 #define TLV_AT_INT      0x0202
64 #define TLV_AT_EXT      0x0203
65 #define TLV_AT_CBL      0x0204
66 #define TLV_IPX_INT     0x0302
67 #define TLV_IPX_EXT     0x0303
68
69 #define EIGRP_HEADER_LENGTH     20
70
71 static gint proto_eigrp = -1;
72
73 static gint hf_eigrp_opcode = -1;
74 static gint hf_eigrp_as = -1;
75 static gint hf_eigrp_tlv = -1;
76
77 static gint ett_eigrp = -1;
78 static gint ett_tlv = -1;
79
80 static dissector_handle_t ipxsap_handle;
81
82
83 static const value_string eigrp_opcode_vals[] = {
84         { EIGRP_HELLO,          "Hello/Ack" },
85         { EIGRP_UPDATE,         "Update" },
86         { EIGRP_REPLY,          "Reply" },
87         { EIGRP_QUERY,          "Query" },
88         { EIGRP_REQUEST,        "Request" },
89         { EIGRP_SAP,            "IPX/SAP Update" },
90         { EIGRP_HI,             "Hello" },
91         { EIGRP_ACK,            "Acknowledge" },
92         { 0,                            NULL }    
93 };
94
95 static const value_string eigrp_tlv_vals[] = {
96         { TLV_PAR,     "EIGRP Parameters"},
97         { TLV_AUTH,    "Authentication data"},
98         { TLV_SEQ ,    "Sequence"},
99         { TLV_SV,      "Software Version"},
100         { TLV_NMS   ,  "Next multicast sequence"},
101         { TLV_IP_INT,  "IP internal route"},
102         { TLV_IP_EXT,  "IP external route"},
103         { TLV_AT_INT,  "AppleTalk internal route"},
104         { TLV_AT_EXT,  "AppleTalk external route"},
105         { TLV_AT_CBL,  "AppleTalk cable configuration"},
106         { TLV_IPX_INT, "IPX internal route"},
107         { TLV_IPX_EXT, "IPX external route"},
108         { 0,            NULL}
109 };
110
111 static const value_string eigrp_pid_vals[] = {
112         { 1,    "IGRP"},
113         { 2,    "EIGRP"},
114         { 3,    "Static Route"},
115         { 4,    "RIP"},
116         { 5,    "Hello"},
117         { 6,    "OSPF"},
118         { 7,    "IS-IS"},
119         { 8,    "EGP"},
120         { 9,    "BGP"},
121         { 10,   "IDRP"},
122         { 11,   "Connected link"},
123         { 0,    NULL}
124 };
125
126
127 static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
128 static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
129 static void dissect_eigrp_sv  (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
130 static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
131
132 static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
133 static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
134
135 static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
136 static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
137
138 static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
139 static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
140 static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti);
141
142 static void
143 dissect_eigrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
144
145   proto_tree *eigrp_tree,*tlv_tree;
146   proto_item *ti;
147     
148   guint opcode,opcode_tmp;
149   guint16 tlv,size, offset = EIGRP_HEADER_LENGTH;
150   guint32 ack;
151       
152   if (check_col(pinfo->fd, COL_PROTOCOL))
153     col_set_str(pinfo->fd, COL_PROTOCOL, "EIGRP");
154   if (check_col(pinfo->fd, COL_INFO))
155     col_clear(pinfo->fd, COL_INFO);
156
157   opcode_tmp=opcode=tvb_get_guint8(tvb,1);
158   ack = tvb_get_ntohl(tvb,12);
159   if (opcode==EIGRP_HELLO) { if (ack == 0) opcode_tmp=EIGRP_HI; else opcode_tmp=EIGRP_ACK; }
160   
161   if (check_col(pinfo->fd, COL_INFO))
162     col_add_str(pinfo->fd, COL_INFO,
163         val_to_str(opcode_tmp , eigrp_opcode_vals, "Unknown (0x%04x)"));
164
165
166
167
168   if (tree) {
169
170      ti = proto_tree_add_protocol_format(tree, proto_eigrp, tvb, 0,
171               tvb_length(tvb), "Cisco EIGRP ");
172               
173      eigrp_tree = proto_item_add_subtree(ti, ett_eigrp);
174   
175      proto_tree_add_text (eigrp_tree, tvb, 0,1,"Version    = %u",tvb_get_guint8(tvb,0)) ;
176      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")) ;
177      proto_tree_add_text (eigrp_tree, tvb, 2,2,"Checksum   = 0x%04x",tvb_get_ntohs(tvb,2)) ;
178      proto_tree_add_text (eigrp_tree, tvb, 4,4,"Flags      = 0x%08x",tvb_get_ntohl(tvb,4)) ;
179      proto_tree_add_text (eigrp_tree, tvb, 8,4,"Sequence   = %u",tvb_get_ntohl(tvb,8)) ;
180      proto_tree_add_text (eigrp_tree, tvb, 12,4,"Acknowledge  = %u",tvb_get_ntohl(tvb,12)) ;
181      proto_tree_add_uint (eigrp_tree, hf_eigrp_as, tvb, 16,4,tvb_get_ntohl(tvb,16)) ; 
182
183      if (opcode==EIGRP_SAP)
184         {
185         call_dissector(ipxsap_handle, tvb_new_subset(tvb, EIGRP_HEADER_LENGTH, -1, -1), pinfo, eigrp_tree);
186         return;
187         }
188
189      while ( tvb_length_remaining(tvb,offset)>0 ) {
190
191              tlv = tvb_get_ntohs(tvb,offset);
192              size =  tvb_get_ntohs(tvb,offset+2);
193              if ( size == 0 ) 
194                 {
195                 proto_tree_add_text(eigrp_tree,tvb,offset,tvb_length_remaining(tvb,offset),"Unknown data (maybe authentication)");
196                 return;
197                 }
198
199              ti = proto_tree_add_text (eigrp_tree, tvb, offset,size,
200                  "%s",val_to_str(tlv, eigrp_tlv_vals, "Unknown (0x%04x)"));
201
202              tlv_tree = proto_item_add_subtree (ti, ett_tlv);
203              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")) ;
204              proto_tree_add_text (tlv_tree,tvb,offset+2,2,"Size = %u bytes",size) ;
205
206                      
207              switch (tlv){
208                 case TLV_PAR:
209                         dissect_eigrp_par(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
210                         break;
211                 case TLV_SEQ:
212                         dissect_eigrp_seq(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
213                         break;
214                 case TLV_SV:
215                         dissect_eigrp_sv(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
216                         break;
217                 case TLV_NMS:
218                         dissect_eigrp_nms(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
219                         break;
220
221                 case TLV_IP_INT:
222                         dissect_eigrp_ip_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
223                         break;                   
224                 case TLV_IP_EXT:
225                         dissect_eigrp_ip_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
226                         break;                   
227
228                 case TLV_IPX_INT:
229                         dissect_eigrp_ipx_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
230                         break;                   
231                 case TLV_IPX_EXT:
232                         dissect_eigrp_ipx_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
233                         break;                   
234         
235                 case TLV_AT_CBL:
236                         dissect_eigrp_at_cbl(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
237                         break;                   
238                 case TLV_AT_INT:
239                         dissect_eigrp_at_int(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
240                         break;                   
241                 case TLV_AT_EXT:
242                         dissect_eigrp_at_ext(tvb_new_subset(tvb, offset+4, size-4, -1), tlv_tree, ti);
243                         break;                   
244                 case TLV_AUTH:
245                         proto_tree_add_text(tlv_tree,tvb,offset+4,size-4,"Authentication data");
246                         break;
247                 };
248
249              offset+=size;
250      }     
251
252    }
253 }
254
255
256
257 static void dissect_eigrp_par (tvbuff_t *tvb, proto_tree *tree, proto_item *ti) {
258         proto_tree_add_text (tree,tvb,0,1,"K1 = %u",tvb_get_guint8(tvb,0));
259         proto_tree_add_text (tree,tvb,1,1,"K2 = %u",tvb_get_guint8(tvb,1));
260         proto_tree_add_text (tree,tvb,2,1,"K3 = %u",tvb_get_guint8(tvb,2));
261         proto_tree_add_text (tree,tvb,3,1,"K4 = %u",tvb_get_guint8(tvb,3));
262         proto_tree_add_text (tree,tvb,4,1,"K5 = %u",tvb_get_guint8(tvb,4));
263         proto_tree_add_text (tree,tvb,5,1,"Rezerved");
264         proto_tree_add_text (tree,tvb,6,2,"Hold Time = %u",tvb_get_ntohs(tvb,6));
265 }
266
267 static void dissect_eigrp_seq (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
268 {       guint8 addr_len;
269         addr_len=tvb_get_guint8(tvb,0);
270         proto_tree_add_text (tree,tvb,0,1,"Address length = %u",addr_len);
271         switch (addr_len){
272                 case 4:
273                         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));
274                         break;
275                 case 10:
276                         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));
277                         break;
278                 default:
279                         /* nothing */
280                         ;
281                 }
282 }               
283
284 static void dissect_eigrp_sv (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
285 {
286         proto_tree_add_text (tree,tvb,0,2," IOS  release version = %u.%u",tvb_get_guint8(tvb,0),tvb_get_guint8(tvb,1));
287         proto_tree_add_text (tree,tvb,2,2,"EIGRP release version = %u.%u",tvb_get_guint8(tvb,2),tvb_get_guint8(tvb,3));
288         proto_item_set_text (ti,"%s : IOS=%u.%u, EIGRP=%u.%u ",match_strval(TLV_SV,eigrp_tlv_vals),tvb_get_guint8(tvb,0),tvb_get_guint8(tvb,1),tvb_get_guint8(tvb,2),tvb_get_guint8(tvb,3));
289
290 }
291
292 static void dissect_eigrp_nms (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
293 {
294         proto_tree_add_text (tree,tvb,0,4,"Next Multicast Sequence = %u",tvb_get_ntohl(tvb,0));
295         proto_item_set_text (ti,"%s : %u",match_strval(TLV_NMS,eigrp_tlv_vals),tvb_get_ntohl(tvb,0));
296 }
297
298
299         
300 static void dissect_eigrp_ip_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti) 
301 {
302         guint8 ip_addr[4],length,addr_len;
303         tvb_memcpy(tvb,ip_addr,0,4);
304         proto_tree_add_text (tree,tvb,0,4, "Next Hop    = %s",ip_to_str(ip_addr));
305         proto_tree_add_text (tree,tvb,4,4, "Delay       = %u",tvb_get_ntohl(tvb,4));
306         proto_tree_add_text (tree,tvb,8,4, "Bandwidth   = %u",tvb_get_ntohl(tvb,8));
307         proto_tree_add_text (tree,tvb,12,3,"MTU         = %u",tvb_get_ntoh24(tvb,12));
308         proto_tree_add_text (tree,tvb,15,1,"Hop Count   = %u",tvb_get_guint8(tvb,15));
309         proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
310         proto_tree_add_text (tree,tvb,17,1,"Load        = %u",tvb_get_guint8(tvb,17));
311         proto_tree_add_text (tree,tvb,18,2,"Rezerved ");
312         length=tvb_get_guint8(tvb,20);
313         proto_tree_add_text (tree,tvb,20,1,"Prefix Length = %u",length);
314         if (length % 8 == 0) addr_len=length/8 ; else addr_len=length/8+1;
315         ip_addr[0]=ip_addr[1]=ip_addr[2]=ip_addr[3]=0;
316         tvb_memcpy(tvb,ip_addr,21,addr_len);
317         proto_tree_add_text (tree,tvb,21,addr_len,"Destination = %s",ip_to_str(ip_addr));
318         proto_item_set_text (ti,"%s  =   %s/%u%s",match_strval(TLV_IP_INT,eigrp_tlv_vals),ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,4)==0xffffffff)?" - Destination unreachable":""));
319 }
320
321 static void dissect_eigrp_ip_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
322 {
323         guint8 ip_addr[4],length,addr_len;
324         tvb_memcpy(tvb,ip_addr,0,4);
325         proto_tree_add_text (tree,tvb,0,4,"Next Hop = %s",ip_to_str(ip_addr));
326         tvb_memcpy(tvb,ip_addr,4,4);
327         proto_tree_add_text (tree,tvb,4,4,"Originating router = %s",ip_to_str(ip_addr));
328         proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
329         proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
330         proto_tree_add_text (tree,tvb,16,4,"External protocol metric = %u",tvb_get_ntohl(tvb,16));      
331         proto_tree_add_text (tree,tvb,20,2,"Rezerved"); 
332         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"));
333         proto_tree_add_text (tree,tvb,23,1,"Flags = 0x%0x",tvb_get_guint8(tvb,23));
334
335         proto_tree_add_text (tree,tvb,24,4,"Delay     = %u",tvb_get_ntohl(tvb,24));
336         proto_tree_add_text (tree,tvb,28,4,"Bandwidth = %u",tvb_get_ntohl(tvb,28));
337         proto_tree_add_text (tree,tvb,32,3,"MTU    = %u",tvb_get_ntoh24(tvb,32));
338         proto_tree_add_text (tree,tvb,35,1,"Hop Count = %u",tvb_get_guint8(tvb,35));
339         proto_tree_add_text (tree,tvb,36,1,"Reliability = %u",tvb_get_guint8(tvb,36));
340         proto_tree_add_text (tree,tvb,37,1,"Load = %u",tvb_get_guint8(tvb,37));
341         proto_tree_add_text (tree,tvb,38,2,"Rezerved ");
342         length=tvb_get_guint8(tvb,40);
343         proto_tree_add_text (tree,tvb,40,1,"Prefix Length = %u",length);
344         if (length % 8 == 0) addr_len=length/8 ; else addr_len=length/8+1;
345         ip_addr[0]=ip_addr[1]=ip_addr[2]=ip_addr[3]=0;
346         tvb_memcpy(tvb,ip_addr,41,addr_len);
347         proto_tree_add_text (tree,tvb,41,addr_len,"Destination = %s",ip_to_str(ip_addr));
348         proto_item_set_text (ti,"%s  =   %s/%u%s",match_strval(TLV_IP_EXT,eigrp_tlv_vals),ip_to_str(ip_addr),length,((tvb_get_ntohl(tvb,24)==0xffffffff)?" - Destination unreachable":""));
349 }
350
351
352
353 static void dissect_eigrp_ipx_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
354 {
355         proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
356         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));
357         proto_tree_add_text (tree,tvb,10,4,"Delay     = %u",tvb_get_ntohl(tvb,10));
358         proto_tree_add_text (tree,tvb,14,4,"Bandwidth = %u",tvb_get_ntohl(tvb,14));
359         proto_tree_add_text (tree,tvb,18,3,"MTU    = %u",tvb_get_ntoh24(tvb,18));
360         proto_tree_add_text (tree,tvb,21,1,"Hop Count = %u",tvb_get_guint8(tvb,21));
361         proto_tree_add_text (tree,tvb,22,1,"Reliability = %u",tvb_get_guint8(tvb,22));
362         proto_tree_add_text (tree,tvb,23,1,"Load = %u",tvb_get_guint8(tvb,23));
363         proto_tree_add_text (tree,tvb,24,2,"Rezerved ");
364         proto_tree_add_text (tree,tvb,26,4,"Destination Address =  %08x",tvb_get_ntohl(tvb,26)); 
365         proto_item_set_text (ti,"%s  =   %08x%s",match_strval(TLV_IPX_INT,eigrp_tlv_vals),tvb_get_ntohl(tvb,26),((tvb_get_ntohl(tvb,10)==0xffffffff)?" - Destination unreachable":""));
366 }
367
368 static void dissect_eigrp_ipx_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
369 {
370         proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %08x",tvb_get_ntohl(tvb,4));
371         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));
372
373         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));
374         proto_tree_add_text (tree,tvb,16,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,16));
375         proto_tree_add_text (tree,tvb,20,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,20));
376         proto_tree_add_text (tree,tvb,24,1,"External protocol  = %u",tvb_get_guint8(tvb,24));
377         proto_tree_add_text (tree,tvb,25,1,"Rezerved");
378         proto_tree_add_text (tree,tvb,26,2,"External metric = %u ",tvb_get_ntohs(tvb,26)); 
379         proto_tree_add_text (tree,tvb,28,2,"External delay  = %u ",tvb_get_ntohs(tvb,28)); 
380         
381         proto_tree_add_text (tree,tvb,30,4,"Delay     = %u",tvb_get_ntohl(tvb,30));
382         proto_tree_add_text (tree,tvb,34,4,"Bandwidth = %u",tvb_get_ntohl(tvb,34));
383         proto_tree_add_text (tree,tvb,38,3,"MTU    = %u",tvb_get_ntoh24(tvb,38));
384         proto_tree_add_text (tree,tvb,41,1,"Hop Count = %u",tvb_get_guint8(tvb,41));
385         proto_tree_add_text (tree,tvb,42,1,"Reliability = %u",tvb_get_guint8(tvb,42));
386         proto_tree_add_text (tree,tvb,43,1,"Load = %u",tvb_get_guint8(tvb,43));
387         proto_tree_add_text (tree,tvb,44,2,"Rezerved ");
388         proto_tree_add_text (tree,tvb,46,4,"Destination Address =  %08x",tvb_get_ntohl(tvb,46)); 
389         proto_item_set_text (ti,"%s  =   %08x%s",match_strval(TLV_IPX_EXT,eigrp_tlv_vals),tvb_get_ntohl(tvb,46),((tvb_get_ntohl(tvb,30)==0xffffffff)?" - Destination unreachable":""));
390
391 }
392
393
394
395 static void dissect_eigrp_at_cbl (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
396 {
397         proto_tree_add_text (tree,tvb,0,4,"AppleTalk Cable Range = %u-%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
398         proto_tree_add_text (tree,tvb,4,4,"AppleTalk Router ID   = %u",tvb_get_ntohl(tvb,4));
399         proto_item_set_text (ti,"%s : Cable range= %u-%u, Router ID= %u",match_strval(TLV_AT_CBL,eigrp_tlv_vals),tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2),tvb_get_ntohl(tvb,4));
400
401 }
402
403 static void dissect_eigrp_at_int (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
404 {
405         proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
406
407         proto_tree_add_text (tree,tvb,4,4,"Delay     = %u",tvb_get_ntohl(tvb,4));
408         proto_tree_add_text (tree,tvb,8,4,"Bandwidth = %u",tvb_get_ntohl(tvb,8));
409         proto_tree_add_text (tree,tvb,12,3,"MTU    = %u",tvb_get_ntoh24(tvb,12));
410         proto_tree_add_text (tree,tvb,15,1,"Hop Count = %u",tvb_get_guint8(tvb,15));
411         proto_tree_add_text (tree,tvb,16,1,"Reliability = %u",tvb_get_guint8(tvb,16));
412         proto_tree_add_text (tree,tvb,17,1,"Load = %u",tvb_get_guint8(tvb,17));
413         proto_tree_add_text (tree,tvb,18,2,"Rezerved ");
414         proto_tree_add_text (tree,tvb,20,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
415
416         proto_item_set_text (ti,"%s : %u-%u",match_strval(TLV_AT_INT,eigrp_tlv_vals),tvb_get_ntohs(tvb,20),tvb_get_ntohs(tvb,22));
417
418 }
419
420 static void dissect_eigrp_at_ext (tvbuff_t *tvb, proto_tree *tree, proto_item *ti)
421 {
422         proto_tree_add_text (tree,tvb,0,4,"Next Hop Address = %u.%u",tvb_get_ntohs(tvb,0),tvb_get_ntohs(tvb,2));
423         proto_tree_add_text (tree,tvb,4,4,"Originating router ID = %u",tvb_get_ntohl(tvb,4));
424         proto_tree_add_text (tree,tvb,8,4,"Originating A.S. = %u",tvb_get_ntohl(tvb,8));
425         proto_tree_add_text (tree,tvb,12,4,"Arbitrary tag = %u",tvb_get_ntohl(tvb,12));
426         proto_tree_add_text (tree,tvb,16,1,"External protocol ID = %u ",tvb_get_guint8(tvb,16));
427         proto_tree_add_text (tree,tvb,17,1,"Flags = 0x%0x",tvb_get_guint8(tvb,17));
428         proto_tree_add_text (tree,tvb,18,2,"External protocol metric = %u",tvb_get_ntohs(tvb,18));      
429
430         proto_tree_add_text (tree,tvb,20,4,"Delay     = %u",tvb_get_ntohl(tvb,20));
431         proto_tree_add_text (tree,tvb,24,4,"Bandwidth = %u",tvb_get_ntohl(tvb,24));
432         proto_tree_add_text (tree,tvb,28,3,"MTU    = %u",tvb_get_ntoh24(tvb,28));
433         proto_tree_add_text (tree,tvb,31,1,"Hop Count = %u",tvb_get_guint8(tvb,31));
434         proto_tree_add_text (tree,tvb,32,1,"Reliability = %u",tvb_get_guint8(tvb,32));
435         proto_tree_add_text (tree,tvb,33,1,"Load = %u",tvb_get_guint8(tvb,33));
436         proto_tree_add_text (tree,tvb,34,2,"Rezerved ");
437         proto_tree_add_text (tree,tvb,36,4,"Cable range = %u-%u",tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
438
439         proto_item_set_text (ti,"%s : %u-%u",match_strval(TLV_AT_EXT,eigrp_tlv_vals),tvb_get_ntohs(tvb,36),tvb_get_ntohs(tvb,38));
440 }
441
442
443
444
445 void
446 proto_register_eigrp(void)
447 {
448   static hf_register_info hf[] = {
449    { &hf_eigrp_opcode,
450     { "Opcode", "eigrp.opcode",
451      FT_UINT8, BASE_DEC, NULL, 0x0 ,
452      "Opcode number", HFILL }
453      },
454    { &hf_eigrp_as,
455     { "Autonomous System  ", "eigrp.as",
456       FT_UINT16, BASE_DEC, NULL, 0x0 ,
457      "Autonomous System number", HFILL }
458     },
459    { &hf_eigrp_tlv,
460     { "Entry  ",           "eigrp.tlv",
461       FT_UINT16, BASE_DEC, NULL, 0x0 ,
462      "Type/Length/Value", HFILL }
463     },
464    };
465                                                        
466    static gint *ett[] = {
467      &ett_eigrp,
468      &ett_tlv,
469    };
470    proto_eigrp = proto_register_protocol("Enhanced Interior Gateway Routing Protocol",
471                                          "EIGRP", "eigrp");
472    proto_register_field_array(proto_eigrp, hf, array_length(hf));
473    proto_register_subtree_array(ett, array_length(ett));
474 }
475
476 void
477 proto_reg_handoff_eigrp(void)
478 {
479     ipxsap_handle = find_dissector("ipxsap");
480     dissector_add("ip.proto", IP_PROTO_EIGRP, dissect_eigrp, proto_eigrp);
481     dissector_add("ddp.type", DDP_EIGRP, dissect_eigrp, proto_eigrp);
482     dissector_add("ipx.socket", IPX_SOCKET_EIGRP, dissect_eigrp, proto_eigrp);
483 }