e5a811d7dc8dc79619e1e52694d8a66ea8d15e13
[dragonfly.git] / contrib / tcpdump-3.9 / print-egp.c
1 /*
2  * Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996
3  *      The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms are permitted
6  * provided that the above copyright notice and this paragraph are
7  * duplicated in all such forms and that any documentation,
8  * advertising materials, and other materials related to such
9  * distribution and use acknowledge that the software was developed
10  * by the University of California, Lawrence Berkeley Laboratory,
11  * Berkeley, CA.  The name of the University may not be used to
12  * endorse or promote products derived from this software without
13  * specific prior written permission.
14  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
15  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
17  *
18  * Initial contribution from Jeff Honig (jch@MITCHELL.CIT.CORNELL.EDU).
19  */
20
21 #ifndef lint
22 static const char rcsid[] _U_ =
23     "@(#) $Header: /tcpdump/master/tcpdump/print-egp.c,v 1.37 2005/01/12 11:19:09 hannes Exp $ (LBL)";
24 #endif
25
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29
30 #include <tcpdump-stdinc.h>
31
32 #include <stdio.h>
33
34 #include "interface.h"
35 #include "addrtoname.h"
36 #include "extract.h"
37
38 #include "ip.h"
39
40 struct egp_packet {
41         u_int8_t  egp_version;
42 #define EGP_VERSION     2
43         u_int8_t  egp_type;
44 #define  EGPT_ACQUIRE   3
45 #define  EGPT_REACH     5
46 #define  EGPT_POLL      2
47 #define  EGPT_UPDATE    1
48 #define  EGPT_ERROR     8
49         u_int8_t  egp_code;
50 #define  EGPC_REQUEST   0
51 #define  EGPC_CONFIRM   1
52 #define  EGPC_REFUSE    2
53 #define  EGPC_CEASE     3
54 #define  EGPC_CEASEACK  4
55 #define  EGPC_HELLO     0
56 #define  EGPC_HEARDU    1
57         u_int8_t  egp_status;
58 #define  EGPS_UNSPEC    0
59 #define  EGPS_ACTIVE    1
60 #define  EGPS_PASSIVE   2
61 #define  EGPS_NORES     3
62 #define  EGPS_ADMIN     4
63 #define  EGPS_GODOWN    5
64 #define  EGPS_PARAM     6
65 #define  EGPS_PROTO     7
66 #define  EGPS_INDET     0
67 #define  EGPS_UP        1
68 #define  EGPS_DOWN      2
69 #define  EGPS_UNSOL     0x80
70         u_int16_t  egp_checksum;
71         u_int16_t  egp_as;
72         u_int16_t  egp_sequence;
73         union {
74                 u_int16_t  egpu_hello;
75                 u_int8_t egpu_gws[2];
76                 u_int16_t  egpu_reason;
77 #define  EGPR_UNSPEC    0
78 #define  EGPR_BADHEAD   1
79 #define  EGPR_BADDATA   2
80 #define  EGPR_NOREACH   3
81 #define  EGPR_XSPOLL    4
82 #define  EGPR_NORESP    5
83 #define  EGPR_UVERSION  6
84         } egp_handg;
85 #define  egp_hello  egp_handg.egpu_hello
86 #define  egp_intgw  egp_handg.egpu_gws[0]
87 #define  egp_extgw  egp_handg.egpu_gws[1]
88 #define  egp_reason  egp_handg.egpu_reason
89         union {
90                 u_int16_t  egpu_poll;
91                 u_int32_t egpu_sourcenet;
92         } egp_pands;
93 #define  egp_poll  egp_pands.egpu_poll
94 #define  egp_sourcenet  egp_pands.egpu_sourcenet
95 };
96
97 const char *egp_acquire_codes[] = {
98         "request",
99         "confirm",
100         "refuse",
101         "cease",
102         "cease_ack"
103 };
104
105 const char *egp_acquire_status[] = {
106         "unspecified",
107         "active_mode",
108         "passive_mode",
109         "insufficient_resources",
110         "administratively_prohibited",
111         "going_down",
112         "parameter_violation",
113         "protocol_violation"
114 };
115
116 const char *egp_reach_codes[] = {
117         "hello",
118         "i-h-u"
119 };
120
121 const char *egp_status_updown[] = {
122         "indeterminate",
123         "up",
124         "down"
125 };
126
127 const char *egp_reasons[] = {
128         "unspecified",
129         "bad_EGP_header_format",
130         "bad_EGP_data_field_format",
131         "reachability_info_unavailable",
132         "excessive_polling_rate",
133         "no_response",
134         "unsupported_version"
135 };
136
137 static void
138 egpnrprint(register const struct egp_packet *egp)
139 {
140         register const u_int8_t *cp;
141         u_int32_t addr;
142         register u_int32_t net;
143         register u_int netlen;
144         int gateways, distances, networks;
145         int t_gateways;
146         const char *comma;
147
148         addr = egp->egp_sourcenet;
149         if (IN_CLASSA(addr)) {
150                 net = addr & IN_CLASSA_NET;
151                 netlen = 1;
152         } else if (IN_CLASSB(addr)) {
153                 net = addr & IN_CLASSB_NET;
154                 netlen = 2;
155         } else if (IN_CLASSC(addr)) {
156                 net = addr & IN_CLASSC_NET;
157                 netlen = 3;
158         } else {
159                 net = 0;
160                 netlen = 0;
161         }
162         cp = (u_int8_t *)(egp + 1);
163
164         t_gateways = egp->egp_intgw + egp->egp_extgw;
165         for (gateways = 0; gateways < t_gateways; ++gateways) {
166                 /* Pickup host part of gateway address */
167                 addr = 0;
168                 TCHECK2(cp[0], 4 - netlen);
169                 switch (netlen) {
170
171                 case 1:
172                         addr = *cp++;
173                         /* fall through */
174                 case 2:
175                         addr = (addr << 8) | *cp++;
176                         /* fall through */
177                 case 3:
178                         addr = (addr << 8) | *cp++;
179                 }
180                 addr |= net;
181                 TCHECK2(cp[0], 1);
182                 distances = *cp++;
183                 printf(" %s %s ",
184                        gateways < (int)egp->egp_intgw ? "int" : "ext",
185                        ipaddr_string(&addr));
186
187                 comma = "";
188                 putchar('(');
189                 while (--distances >= 0) {
190                         TCHECK2(cp[0], 2);
191                         printf("%sd%d:", comma, (int)*cp++);
192                         comma = ", ";
193                         networks = *cp++;
194                         while (--networks >= 0) {
195                                 /* Pickup network number */
196                                 TCHECK2(cp[0], 1);
197                                 addr = (u_int32_t)*cp++ << 24;
198                                 if (IN_CLASSB(addr)) {
199                                         TCHECK2(cp[0], 1);
200                                         addr |= (u_int32_t)*cp++ << 16;
201                                 } else if (!IN_CLASSA(addr)) {
202                                         TCHECK2(cp[0], 2);
203                                         addr |= (u_int32_t)*cp++ << 16;
204                                         addr |= (u_int32_t)*cp++ << 8;
205                                 }
206                                 printf(" %s", ipaddr_string(&addr));
207                         }
208                 }
209                 putchar(')');
210         }
211         return;
212 trunc:
213         fputs("[|]", stdout);
214 }
215
216 void
217 egp_print(register const u_int8_t *bp, register u_int length)
218 {
219         register const struct egp_packet *egp;
220         register int status;
221         register int code;
222         register int type;
223
224         egp = (struct egp_packet *)bp;
225         if (!TTEST2(*egp, length)) {
226                 printf("[|egp]");
227                 return;
228         }
229         (void)printf("egp: ");
230
231         if (egp->egp_version != EGP_VERSION) {
232                 printf("[version %d]", egp->egp_version);
233                 return;
234         }
235         printf("as:%d seq:%d", EXTRACT_16BITS(&egp->egp_as), EXTRACT_16BITS(&egp->egp_sequence));
236
237         type = egp->egp_type;
238         code = egp->egp_code;
239         status = egp->egp_status;
240
241         switch (type) {
242         case EGPT_ACQUIRE:
243                 printf(" acquire");
244                 switch (code) {
245                 case EGPC_REQUEST:
246                 case EGPC_CONFIRM:
247                         printf(" %s", egp_acquire_codes[code]);
248                         switch (status) {
249                         case EGPS_UNSPEC:
250                         case EGPS_ACTIVE:
251                         case EGPS_PASSIVE:
252                                 printf(" %s", egp_acquire_status[status]);
253                                 break;
254
255                         default:
256                                 printf(" [status %d]", status);
257                                 break;
258                         }
259                         printf(" hello:%d poll:%d",
260                                EXTRACT_16BITS(&egp->egp_hello),
261                                EXTRACT_16BITS(&egp->egp_poll));
262                         break;
263
264                 case EGPC_REFUSE:
265                 case EGPC_CEASE:
266                 case EGPC_CEASEACK:
267                         printf(" %s", egp_acquire_codes[code]);
268                         switch (status ) {
269                         case EGPS_UNSPEC:
270                         case EGPS_NORES:
271                         case EGPS_ADMIN:
272                         case EGPS_GODOWN:
273                         case EGPS_PARAM:
274                         case EGPS_PROTO:
275                                 printf(" %s", egp_acquire_status[status]);
276                                 break;
277
278                         default:
279                                 printf("[status %d]", status);
280                                 break;
281                         }
282                         break;
283
284                 default:
285                         printf("[code %d]", code);
286                         break;
287                 }
288                 break;
289
290         case EGPT_REACH:
291                 switch (code) {
292
293                 case EGPC_HELLO:
294                 case EGPC_HEARDU:
295                         printf(" %s", egp_reach_codes[code]);
296                         if (status <= EGPS_DOWN)
297                                 printf(" state:%s", egp_status_updown[status]);
298                         else
299                                 printf(" [status %d]", status);
300                         break;
301
302                 default:
303                         printf("[reach code %d]", code);
304                         break;
305                 }
306                 break;
307
308         case EGPT_POLL:
309                 printf(" poll");
310                 if (egp->egp_status <= EGPS_DOWN)
311                         printf(" state:%s", egp_status_updown[status]);
312                 else
313                         printf(" [status %d]", status);
314                 printf(" net:%s", ipaddr_string(&egp->egp_sourcenet));
315                 break;
316
317         case EGPT_UPDATE:
318                 printf(" update");
319                 if (status & EGPS_UNSOL) {
320                         status &= ~EGPS_UNSOL;
321                         printf(" unsolicited");
322                 }
323                 if (status <= EGPS_DOWN)
324                         printf(" state:%s", egp_status_updown[status]);
325                 else
326                         printf(" [status %d]", status);
327                 printf(" %s int %d ext %d",
328                        ipaddr_string(&egp->egp_sourcenet),
329                        egp->egp_intgw,
330                        egp->egp_extgw);
331                 if (vflag)
332                         egpnrprint(egp);
333                 break;
334
335         case EGPT_ERROR:
336                 printf(" error");
337                 if (status <= EGPS_DOWN)
338                         printf(" state:%s", egp_status_updown[status]);
339                 else
340                         printf(" [status %d]", status);
341
342                 if (EXTRACT_16BITS(&egp->egp_reason) <= EGPR_UVERSION)
343                         printf(" %s", egp_reasons[EXTRACT_16BITS(&egp->egp_reason)]);
344                 else
345                         printf(" [reason %d]", EXTRACT_16BITS(&egp->egp_reason));
346                 break;
347
348         default:
349                 printf("[type %d]", type);
350                 break;
351         }
352 }