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print-isoclns.c (26183) print-isoclns.c (32149)
1/*
2 * Copyright (c) 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, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and

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46#include "ethertype.h"
47#include "extract.h"
48
49#define NLPID_CLNS 129 /* 0x81 */
50#define NLPID_ESIS 130 /* 0x82 */
51#define NLPID_ISIS 131 /* 0x83 */
52#define NLPID_NULLNS 0
53
1/*
2 * Copyright (c) 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, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and

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46#include "ethertype.h"
47#include "extract.h"
48
49#define NLPID_CLNS 129 /* 0x81 */
50#define NLPID_ESIS 130 /* 0x82 */
51#define NLPID_ISIS 131 /* 0x83 */
52#define NLPID_NULLNS 0
53
54
55/*
56 * IS-IS is defined in ISO 10589. Look there for protocol definitions.
57 */
58
59#define SYSTEM_ID_LEN sizeof(struct ether_addr)
60#define ISIS_VERSION 1
61#define PDU_TYPE_MASK 0x1F
62#define PRIORITY_MASK 0x7F
63
64#define L1_LAN_IIH 15
65#define L2_LAN_IIH 16
66#define PTP_IIH 17
67#define L1_LS_PDU 18
68#define L2_LS_PDU 19
69#define L1_COMPLETE_SEQ_PDU 24
70#define L2_COMPLETE_SEQ_PDU 25
71
72/*
73 * A TLV is a tuple of a type, length and a value and is normally used for
74 * encoding information in all sorts of places. This is an enumeration of
75 * the well known types.
76 */
77
78#define TLV_AREA_ADDR 1
79#define TLV_IS_REACH 2
80#define TLV_ES_REACH 3
81#define TLV_SUMMARY 5
82#define TLV_ISNEIGH 6
83#define TLV_PADDING 8
84#define TLV_LSP 9
85#define TLV_AUTHENT 10
86#define TLV_IP_REACH 128
87#define TLV_PROTOCOLS 129
88#define TLV_IP_EXTERN 130
89#define TLV_IDRP_INFO 131
90#define TLV_IPADDR 132
91#define TLV_IPAUTH 133
92#define TLV_PTP_ADJ 240
93
94/*
95 * Katz's point to point adjacency TLV uses codes to tell us the state of
96 * the remote adjacency. Enumerate them.
97 */
98
99#define ISIS_PTP_ADJ_UP 0
100#define ISIS_PTP_ADJ_INIT 1
101#define ISIS_PTP_ADJ_DOWN 2
102
54static int osi_cksum(const u_char *, int, u_char *);
55static void esis_print(const u_char *, u_int);
56static int isis_print(const u_char *, u_int);
57
103static int osi_cksum(const u_char *, int, u_char *);
104static void esis_print(const u_char *, u_int);
105static int isis_print(const u_char *, u_int);
106
107
108struct isis_ptp_adjancey_values {
109 u_char id;
110 char *name;
111};
112
113static struct isis_ptp_adjancey_values isis_ptp_adjancey_values[] = {
114 ISIS_PTP_ADJ_UP, "UP",
115 ISIS_PTP_ADJ_INIT, "INIT",
116 ISIS_PTP_ADJ_DOWN, "DOWN"
117};
118
119struct isis_common_header {
120 u_char nlpid;
121 u_char fixed_len;
122 u_char version; /* Protocol version? */
123 u_char id_length;
124 u_char enc_pdu_type; /* 3 MSbs are reserved */
125 u_char pkt_version; /* Packet format version? */
126 u_char reserved;
127 u_char enc_max_area;
128};
129
130struct isis_header {
131 u_char nlpid;
132 u_char fixed_len;
133 u_char version; /* Protocol version? */
134 u_char id_length;
135 u_char enc_pdu_type; /* 3 MSbs are reserved */
136 u_char pkt_version; /* Packet format version? */
137 u_char reserved;
138 u_char enc_max_area;
139 u_char circuit;
140 u_char enc_source_id[SYSTEM_ID_LEN];
141 u_char enc_holding_time[2];
142 u_char enc_packet_len[2];
143 u_char enc_priority;
144 u_char enc_lan_id[SYSTEM_ID_LEN+1];
145};
146struct isis_lan_header {
147 u_char circuit;
148 u_char enc_source_id[SYSTEM_ID_LEN];
149 u_char enc_holding_time[2];
150 u_char enc_packet_len[2];
151 u_char enc_priority;
152 u_char enc_lan_id[SYSTEM_ID_LEN+1];
153};
154
155struct isis_ptp_header {
156 u_char circuit;
157 u_char enc_source_id[SYSTEM_ID_LEN];
158 u_char enc_holding_time[2];
159 u_char enc_packet_len[2];
160 u_char loc_circuit_id;
161};
162
163#define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
164#define ISIS_HEADER_SIZE (15+(SYSTEM_ID_LEN<<1))
165#define ISIS_PTP_HEADER_SIZE (14+SYSTEM_ID_LEN)
166#define L1_LS_PDU_HEADER_SIZE (21+SYSTEM_ID_LEN)
167#define L2_LS_PDU_HEADER_SIZE L1_LS_PDU_HEADER_SIZE
168#define L1_COMPLETE_SEQ_PDU_HEADER_SIZE 33
169#define L2_COMPLETE_SEQ_PDU_HEADER_SIZE L1_COMPLETE_SEQ_PDU_HEADER_SIZE
170
171
172
58void
59isoclns_print(const u_char *p, u_int length, u_int caplen,
60 const u_char *esrc, const u_char *edst)
61{
173void
174isoclns_print(const u_char *p, u_int length, u_int caplen,
175 const u_char *esrc, const u_char *edst)
176{
177 u_char pdu_type;
178 struct isis_header *header;
179
180 header = (struct isis_header *)p;
181 pdu_type = header->enc_pdu_type & PDU_TYPE_MASK;
182
62 if (caplen < 1) {
63 printf("[|iso-clns] ");
64 if (!eflag)
65 printf("%s > %s",
66 etheraddr_string(esrc),
67 etheraddr_string(edst));
68 return;
69 }

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84 (void)printf(" %s > %s",
85 etheraddr_string(esrc),
86 etheraddr_string(edst));
87 esis_print(p, length);
88 return;
89
90 case NLPID_ISIS:
91 printf("iso isis");
183 if (caplen < 1) {
184 printf("[|iso-clns] ");
185 if (!eflag)
186 printf("%s > %s",
187 etheraddr_string(esrc),
188 etheraddr_string(edst));
189 return;
190 }

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205 (void)printf(" %s > %s",
206 etheraddr_string(esrc),
207 etheraddr_string(edst));
208 esis_print(p, length);
209 return;
210
211 case NLPID_ISIS:
212 printf("iso isis");
92 if (!eflag)
93 (void)printf(" %s > %s",
213 if (!eflag) {
214 if(pdu_type != PTP_IIH)
215 (void)printf(" %s > %s",
94 etheraddr_string(esrc),
95 etheraddr_string(edst));
216 etheraddr_string(esrc),
217 etheraddr_string(edst));
218 }
96 (void)printf(" len=%d ", length);
97 if (!isis_print(p, length))
98 default_print_unaligned(p, caplen);
99 break;
100
101 case NLPID_NULLNS:
102 printf("iso nullns");
103 if (!eflag)

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299 if (((i & 1) == 0) && (i + 1 < length)) {
300 printf(".");
301 }
302
303 }
304}
305
306/*
219 (void)printf(" len=%d ", length);
220 if (!isis_print(p, length))
221 default_print_unaligned(p, caplen);
222 break;
223
224 case NLPID_NULLNS:
225 printf("iso nullns");
226 if (!eflag)

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422 if (((i & 1) == 0) && (i + 1 < length)) {
423 printf(".");
424 }
425
426 }
427}
428
429/*
307 * IS-IS is defined in ISO 10589. Look there for protocol definitions.
308 */
309
310#define SYSTEM_ID_LEN sizeof(struct ether_addr)
311#define ISIS_VERSION 1
312#define PDU_TYPE_MASK 0x1F
313#define PRIORITY_MASK 0x7F
314
315#define L1_LAN_IIH 15
316#define L2_LAN_IIH 16
317#define PTP_IIH 17
318
319#define TLV_AREA_ADDR 1
320#define TLV_ISNEIGH 6
321#define TLV_PADDING 8
322#define TLV_AUTHENT 10
323
324struct isis_header {
325 u_char nlpid;
326 u_char fixed_len;
327 u_char version; /* Protocol version? */
328 u_char id_length;
329 u_char enc_pdu_type; /* 3 MSbs are reserved */
330 u_char pkt_version; /* Packet format version? */
331 u_char reserved;
332 u_char enc_max_area;
333 u_char circuit;
334 u_char enc_source_id[SYSTEM_ID_LEN];
335 u_char enc_holding_time[2];
336 u_char enc_packet_len[2];
337 u_char enc_priority;
338 u_char enc_lan_id[SYSTEM_ID_LEN+1];
339};
340
341#define ISIS_HEADER_SIZE (15+(SYSTEM_ID_LEN<<1))
342
343/*
344 * isis_print
345 * Decode IS-IS packets. Return 0 on error.
346 *
347 * So far, this is only smart enough to print IIH's. Someday...
348 */
349
350static int
351isis_print (const u_char *p, u_int length)
352{
353 struct isis_header *header;
430 * isis_print
431 * Decode IS-IS packets. Return 0 on error.
432 *
433 * So far, this is only smart enough to print IIH's. Someday...
434 */
435
436static int
437isis_print (const u_char *p, u_int length)
438{
439 struct isis_header *header;
440 struct isis_ptp_header *header_ptp;
354 u_char pdu_type, max_area, priority, *pptr, type, len, *tptr, tmp, alen;
355 u_short packet_len, holding_time;
441 u_char pdu_type, max_area, priority, *pptr, type, len, *tptr, tmp, alen;
442 u_short packet_len, holding_time;
443 int i;
356
444
357 header = (struct isis_header *)p;
445 header_ptp = (struct isis_ptp_header *)header = (struct isis_header *)p;
358 printf("\n\t\t\t");
359
360 /*
361 * Sanity checking of the header.
362 */
363 if (header->nlpid != NLPID_ISIS) {
364 printf(" coding error!");
365 return(0);

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371 }
372
373 if ((header->id_length != SYSTEM_ID_LEN) && (header->id_length != 0)) {
374 printf(" system ID length of %d is not supported",
375 header->id_length);
376 return(0);
377 }
378
446 printf("\n\t\t\t");
447
448 /*
449 * Sanity checking of the header.
450 */
451 if (header->nlpid != NLPID_ISIS) {
452 printf(" coding error!");
453 return(0);

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459 }
460
461 if ((header->id_length != SYSTEM_ID_LEN) && (header->id_length != 0)) {
462 printf(" system ID length of %d is not supported",
463 header->id_length);
464 return(0);
465 }
466
379 if ((header->fixed_len != ISIS_HEADER_SIZE)) {
380 printf(" bogus fixed header length %d should be %d",
381 header->fixed_len, ISIS_HEADER_SIZE);
382 return(0);
467 if ((header->fixed_len != ISIS_HEADER_SIZE) &&
468 (header->fixed_len != ISIS_PTP_HEADER_SIZE) &&
469 (header->fixed_len != L1_LS_PDU_HEADER_SIZE) &&
470 (header-> fixed_len != L1_COMPLETE_SEQ_PDU_HEADER_SIZE) ) {
471 printf(" bogus fixed header length",
472 header->fixed_len);
473 return(0);
383 }
384
385 pdu_type = header->enc_pdu_type & PDU_TYPE_MASK;
474 }
475
476 pdu_type = header->enc_pdu_type & PDU_TYPE_MASK;
386 if ((pdu_type != L1_LAN_IIH) && (pdu_type != L2_LAN_IIH)) {
477 if ((pdu_type != L1_LAN_IIH) && (pdu_type != L2_LAN_IIH) &&
478 (pdu_type != PTP_IIH) &&
479 (pdu_type != L1_COMPLETE_SEQ_PDU) &&
480 (pdu_type != L2_COMPLETE_SEQ_PDU) ) {
387 printf(" PDU type (%d) not supported", pdu_type);
388 return;
389 }
390
391 if (header->pkt_version != ISIS_VERSION) {
392 printf(" version %d packet not supported", header->pkt_version);
393 return;
394 }

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433 packet_len = EXTRACT_16BITS(header->enc_packet_len);
434 if ((packet_len < ISIS_HEADER_SIZE) ||
435 (packet_len > length)) {
436 printf(" bogus packet length %d, real length %d", packet_len,
437 length);
438 return(0);
439 }
440
481 printf(" PDU type (%d) not supported", pdu_type);
482 return;
483 }
484
485 if (header->pkt_version != ISIS_VERSION) {
486 printf(" version %d packet not supported", header->pkt_version);
487 return;
488 }

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527 packet_len = EXTRACT_16BITS(header->enc_packet_len);
528 if ((packet_len < ISIS_HEADER_SIZE) ||
529 (packet_len > length)) {
530 printf(" bogus packet length %d, real length %d", packet_len,
531 length);
532 return(0);
533 }
534
441 priority = header->enc_priority & PRIORITY_MASK;
535 if(pdu_type != PTP_IIH)
536 priority = header->enc_priority & PRIORITY_MASK;
442
443 /*
444 * Now print the fixed header.
445 */
446 switch (pdu_type) {
447 case L1_LAN_IIH:
448 printf(" L1 lan iih, ");
449 break;
450 case L2_LAN_IIH:
451 printf(" L2 lan iih, ");
452 break;
537
538 /*
539 * Now print the fixed header.
540 */
541 switch (pdu_type) {
542 case L1_LAN_IIH:
543 printf(" L1 lan iih, ");
544 break;
545 case L2_LAN_IIH:
546 printf(" L2 lan iih, ");
547 break;
548 case PTP_IIH:
549 printf(" PTP iih, ");
550 break;
453 }
454
455 printf("circuit ");
456 switch (header->circuit) {
457 case 1:
458 printf("l1 only, ");
459 break;
460 case 2:
461 printf("l2 only, ");
462 break;
463 case 3:
464 printf("l1-l2, ");
465 break;
466 }
467
468 printf ("holding time %d ", holding_time);
469 printf ("\n\t\t\t source %s, length %d",
470 etheraddr_string(header->enc_source_id), packet_len);
551 }
552
553 printf("circuit ");
554 switch (header->circuit) {
555 case 1:
556 printf("l1 only, ");
557 break;
558 case 2:
559 printf("l2 only, ");
560 break;
561 case 3:
562 printf("l1-l2, ");
563 break;
564 }
565
566 printf ("holding time %d ", holding_time);
567 printf ("\n\t\t\t source %s, length %d",
568 etheraddr_string(header->enc_source_id), packet_len);
471 printf ("\n\t\t\t lan id %s(%d)", etheraddr_string(header->enc_lan_id),
472 header->enc_lan_id[SYSTEM_ID_LEN]);
569 if((pdu_type==L1_LAN_IIH)||(pdu_type==L2_LAN_IIH))
570 printf ("\n\t\t\t lan id %s(%d)", etheraddr_string(header->enc_lan_id),
571 header->enc_lan_id[SYSTEM_ID_LEN]);
473
474 /*
475 * Now print the TLV's.
476 */
572
573 /*
574 * Now print the TLV's.
575 */
477 packet_len -= ISIS_HEADER_SIZE;
478 pptr = (char *)p + ISIS_HEADER_SIZE;
576 if(pdu_type==PTP_IIH) {
577 packet_len -= ISIS_PTP_HEADER_SIZE;
578 pptr = (char *)p + ISIS_PTP_HEADER_SIZE;
579 } else {
580 packet_len -= ISIS_HEADER_SIZE;
581 pptr = (char *)p + ISIS_HEADER_SIZE;
582 }
479 while (packet_len >= 2) {
480 if (pptr >= snapend) {
481 printf("\n\t\t\t packet exceeded snapshot");
482 return(1);
483 }
484 type = *pptr++;
485 len = *pptr++;
486 packet_len -= 2;

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515 break;
516 case TLV_PADDING:
517 printf("\n\t\t\t padding for %d bytes", len);
518 break;
519 case TLV_AUTHENT:
520 printf("\n\t\t\t authentication data");
521 default_print(pptr, len);
522 break;
583 while (packet_len >= 2) {
584 if (pptr >= snapend) {
585 printf("\n\t\t\t packet exceeded snapshot");
586 return(1);
587 }
588 type = *pptr++;
589 len = *pptr++;
590 packet_len -= 2;

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619 break;
620 case TLV_PADDING:
621 printf("\n\t\t\t padding for %d bytes", len);
622 break;
623 case TLV_AUTHENT:
624 printf("\n\t\t\t authentication data");
625 default_print(pptr, len);
626 break;
627 case TLV_PTP_ADJ:
628 printf("\n\t\t\t PTP adjacency status %s",
629 isis_ptp_adjancey_values[*pptr].name);
630 break;
631 case TLV_PROTOCOLS:
632 printf("\n\t\t\t Supports protocols %s", (len>1)? "are":"is");
633 for(i=0;i<len;i++)
634 printf(" %02X", (u_char)*(pptr+i));
635 break;
636 case TLV_IPADDR:
637 printf("\n\t\t\t IP address: %s", ipaddr_string(pptr));
638 break;
523 default:
524 printf("\n\t\t\t unknown TLV, type %d, length %d", type, len);
525 break;
526 }
527
528 pptr += len;
529 packet_len -= len;
530 }

--- 27 unchanged lines hidden --- 		639 default:
640 printf("\n\t\t\t unknown TLV, type %d, length %d", type, len);
641 break;
642 }
643
644 pptr += len;
645 packet_len -= len;
646 }

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