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Unleashed v1.4
[unleashed.git] / contrib / tcpdump / print-hncp.c
blob11a6a932ffdea81d52609e124c25c822fde0552c
1 /*
2 * Copyright (c) 2016 Antonin Décimo, Jean-Raphaël Gaglione
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the project nor the names of its contributors
13 * may be used to endorse or promote products derived from this software
14 * without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 /* \summary: Home Networking Control Protocol (HNCP) printer */
30
31 #ifdef HAVE_CONFIG_H
32 #include "config.h"
33 #endif
34
35 #include <netdissect-stdinc.h>
36
37 #include <stdlib.h>
38 #include <string.h>
39
40 #include "netdissect.h"
41 #include "addrtoname.h"
42 #include "extract.h"
43
44 static void
45 hncp_print_rec(netdissect_options *ndo,
46 const u_char *cp, u_int length, int indent);
47
48 void
49 hncp_print(netdissect_options *ndo,
50 const u_char *cp, u_int length)
51 {
52 ND_PRINT((ndo, "hncp (%d)", length));
53 hncp_print_rec(ndo, cp, length, 1);
54 }
55
56 /* RFC7787 */
57 #define DNCP_REQUEST_NETWORK_STATE 1
58 #define DNCP_REQUEST_NODE_STATE 2
59 #define DNCP_NODE_ENDPOINT 3
60 #define DNCP_NETWORK_STATE 4
61 #define DNCP_NODE_STATE 5
62 #define DNCP_PEER 8
63 #define DNCP_KEEP_ALIVE_INTERVAL 9
64 #define DNCP_TRUST_VERDICT 10
65
66 /* RFC7788 */
67 #define HNCP_HNCP_VERSION 32
68 #define HNCP_EXTERNAL_CONNECTION 33
69 #define HNCP_DELEGATED_PREFIX 34
70 #define HNCP_PREFIX_POLICY 43
71 #define HNCP_DHCPV4_DATA 37
72 #define HNCP_DHCPV6_DATA 38
73 #define HNCP_ASSIGNED_PREFIX 35
74 #define HNCP_NODE_ADDRESS 36
75 #define HNCP_DNS_DELEGATED_ZONE 39
76 #define HNCP_DOMAIN_NAME 40
77 #define HNCP_NODE_NAME 41
78 #define HNCP_MANAGED_PSK 42
79
80 /* See type_mask in hncp_print_rec below */
81 #define RANGE_DNCP_RESERVED 0x10000
82 #define RANGE_HNCP_UNASSIGNED 0x10001
83 #define RANGE_DNCP_PRIVATE_USE 0x10002
84 #define RANGE_DNCP_FUTURE_USE 0x10003
85
86 static const struct tok type_values[] = {
87 { DNCP_REQUEST_NETWORK_STATE, "Request network state" },
88 { DNCP_REQUEST_NODE_STATE, "Request node state" },
89 { DNCP_NODE_ENDPOINT, "Node endpoint" },
90 { DNCP_NETWORK_STATE, "Network state" },
91 { DNCP_NODE_STATE, "Node state" },
92 { DNCP_PEER, "Peer" },
93 { DNCP_KEEP_ALIVE_INTERVAL, "Keep-alive interval" },
94 { DNCP_TRUST_VERDICT, "Trust-Verdict" },
95
96 { HNCP_HNCP_VERSION, "HNCP-Version" },
97 { HNCP_EXTERNAL_CONNECTION, "External-Connection" },
98 { HNCP_DELEGATED_PREFIX, "Delegated-Prefix" },
99 { HNCP_PREFIX_POLICY, "Prefix-Policy" },
100 { HNCP_DHCPV4_DATA, "DHCPv4-Data" },
101 { HNCP_DHCPV6_DATA, "DHCPv6-Data" },
102 { HNCP_ASSIGNED_PREFIX, "Assigned-Prefix" },
103 { HNCP_NODE_ADDRESS, "Node-Address" },
104 { HNCP_DNS_DELEGATED_ZONE, "DNS-Delegated-Zone" },
105 { HNCP_DOMAIN_NAME, "Domain-Name" },
106 { HNCP_NODE_NAME, "Node-Name" },
107 { HNCP_MANAGED_PSK, "Managed-PSK" },
108
109 { RANGE_DNCP_RESERVED, "Reserved" },
110 { RANGE_HNCP_UNASSIGNED, "Unassigned" },
111 { RANGE_DNCP_PRIVATE_USE, "Private use" },
112 { RANGE_DNCP_FUTURE_USE, "Future use" },
113
114 { 0, NULL}
115 };
116
117 #define DH4OPT_DNS_SERVERS 6 /* RFC2132 */
118 #define DH4OPT_NTP_SERVERS 42 /* RFC2132 */
119 #define DH4OPT_DOMAIN_SEARCH 119 /* RFC3397 */
120
121 static const struct tok dh4opt_str[] = {
122 { DH4OPT_DNS_SERVERS, "DNS-server" },
123 { DH4OPT_NTP_SERVERS, "NTP-server"},
124 { DH4OPT_DOMAIN_SEARCH, "DNS-search" },
125 { 0, NULL }
126 };
127
128 #define DH6OPT_DNS_SERVERS 23 /* RFC3646 */
129 #define DH6OPT_DOMAIN_LIST 24 /* RFC3646 */
130 #define DH6OPT_SNTP_SERVERS 31 /* RFC4075 */
131
132 static const struct tok dh6opt_str[] = {
133 { DH6OPT_DNS_SERVERS, "DNS-server" },
134 { DH6OPT_DOMAIN_LIST, "DNS-search-list" },
135 { DH6OPT_SNTP_SERVERS, "SNTP-servers" },
136 { 0, NULL }
137 };
138
139 /*
140 * For IPv4-mapped IPv6 addresses, length of the prefix that precedes
141 * the 4 bytes of IPv4 address at the end of the IPv6 address.
142 */
143 #define IPV4_MAPPED_HEADING_LEN 12
144
145 /*
146 * Is an IPv6 address an IPv4-mapped address?
147 */
148 static inline int
149 is_ipv4_mapped_address(const u_char *addr)
150 {
151 /* The value of the prefix */
152 static const u_char ipv4_mapped_heading[IPV4_MAPPED_HEADING_LEN] =
153 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF };
154
155 return memcmp(addr, ipv4_mapped_heading, IPV4_MAPPED_HEADING_LEN) == 0;
156 }
157
158 static const char *
159 format_nid(const u_char *data)
160 {
161 static char buf[4][11+5];
162 static int i = 0;
163 i = (i + 1) % 4;
164 snprintf(buf[i], 16, "%02x:%02x:%02x:%02x",
165 data[0], data[1], data[2], data[3]);
166 return buf[i];
167 }
168
169 static const char *
170 format_256(const u_char *data)
171 {
172 static char buf[4][64+5];
173 static int i = 0;
174 i = (i + 1) % 4;
175 snprintf(buf[i], 28, "%016" PRIx64 "%016" PRIx64 "%016" PRIx64 "%016" PRIx64,
176 EXTRACT_64BITS(data),
177 EXTRACT_64BITS(data + 8),
178 EXTRACT_64BITS(data + 16),
179 EXTRACT_64BITS(data + 24)
180 );
181 return buf[i];
182 }
183
184 static const char *
185 format_interval(const uint32_t n)
186 {
187 static char buf[4][sizeof("0000000.000s")];
188 static int i = 0;
189 i = (i + 1) % 4;
190 snprintf(buf[i], sizeof(buf[i]), "%u.%03us", n / 1000, n % 1000);
191 return buf[i];
192 }
193
194 static const char *
195 format_ip6addr(netdissect_options *ndo, const u_char *cp)
196 {
197 if (is_ipv4_mapped_address(cp))
198 return ipaddr_string(ndo, cp + IPV4_MAPPED_HEADING_LEN);
199 else
200 return ip6addr_string(ndo, cp);
201 }
202
203 static int
204 print_prefix(netdissect_options *ndo, const u_char *prefix, u_int max_length)
205 {
206 int plenbytes;
207 char buf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx::/128")];
208
209 if (prefix[0] >= 96 && max_length >= IPV4_MAPPED_HEADING_LEN + 1 &&
210 is_ipv4_mapped_address(&prefix[1])) {
211 struct in_addr addr;
212 u_int plen;
213
214 plen = prefix[0]-96;
215 if (32 < plen)
216 return -1;
217 max_length -= 1;
218
219 memset(&addr, 0, sizeof(addr));
220 plenbytes = (plen + 7) / 8;
221 if (max_length < (u_int)plenbytes + IPV4_MAPPED_HEADING_LEN)
222 return -3;
223 memcpy(&addr, &prefix[1 + IPV4_MAPPED_HEADING_LEN], plenbytes);
224 if (plen % 8) {
225 ((u_char *)&addr)[plenbytes - 1] &=
226 ((0xff00 >> (plen % 8)) & 0xff);
227 }
228 snprintf(buf, sizeof(buf), "%s/%d", ipaddr_string(ndo, &addr), plen);
229 plenbytes += 1 + IPV4_MAPPED_HEADING_LEN;
230 } else {
231 plenbytes = decode_prefix6(ndo, prefix, max_length, buf, sizeof(buf));
232 }
233
234 ND_PRINT((ndo, "%s", buf));
235 return plenbytes;
236 }
237
238 static int
239 print_dns_label(netdissect_options *ndo,
240 const u_char *cp, u_int max_length, int print)
241 {
242 u_int length = 0;
243 while (length < max_length) {
244 u_int lab_length = cp[length++];
245 if (lab_length == 0)
246 return (int)length;
247 if (length > 1 && print)
248 safeputchar(ndo, '.');
249 if (length+lab_length > max_length) {
250 if (print)
251 safeputs(ndo, cp+length, max_length-length);
252 break;
253 }
254 if (print)
255 safeputs(ndo, cp+length, lab_length);
256 length += lab_length;
257 }
258 if (print)
259 ND_PRINT((ndo, "[|DNS]"));
260 return -1;
261 }
262
263 static int
264 dhcpv4_print(netdissect_options *ndo,
265 const u_char *cp, u_int length, int indent)
266 {
267 u_int i, t;
268 const u_char *tlv, *value;
269 uint8_t type, optlen;
270
271 i = 0;
272 while (i < length) {
273 if (i + 2 > length)
274 return -1;
275 tlv = cp + i;
276 type = (uint8_t)tlv[0];
277 optlen = (uint8_t)tlv[1];
278 value = tlv + 2;
279
280 ND_PRINT((ndo, "\n"));
281 for (t = indent; t > 0; t--)
282 ND_PRINT((ndo, "\t"));
283
284 ND_PRINT((ndo, "%s", tok2str(dh4opt_str, "Unknown", type)));
285 ND_PRINT((ndo," (%u)", optlen + 2 ));
286 if (i + 2 + optlen > length)
287 return -1;
288
289 switch (type) {
290 case DH4OPT_DNS_SERVERS:
291 case DH4OPT_NTP_SERVERS: {
292 if (optlen < 4 || optlen % 4 != 0) {
293 return -1;
294 }
295 for (t = 0; t < optlen; t += 4)
296 ND_PRINT((ndo, " %s", ipaddr_string(ndo, value + t)));
297 }
298 break;
299 case DH4OPT_DOMAIN_SEARCH: {
300 const u_char *tp = value;
301 while (tp < value + optlen) {
302 ND_PRINT((ndo, " "));
303 if ((tp = ns_nprint(ndo, tp, value + optlen)) == NULL)
304 return -1;
305 }
306 }
307 break;
308 }
309
310 i += 2 + optlen;
311 }
312 return 0;
313 }
314
315 static int
316 dhcpv6_print(netdissect_options *ndo,
317 const u_char *cp, u_int length, int indent)
318 {
319 u_int i, t;
320 const u_char *tlv, *value;
321 uint16_t type, optlen;
322
323 i = 0;
324 while (i < length) {
325 if (i + 4 > length)
326 return -1;
327 tlv = cp + i;
328 type = EXTRACT_16BITS(tlv);
329 optlen = EXTRACT_16BITS(tlv + 2);
330 value = tlv + 4;
331
332 ND_PRINT((ndo, "\n"));
333 for (t = indent; t > 0; t--)
334 ND_PRINT((ndo, "\t"));
335
336 ND_PRINT((ndo, "%s", tok2str(dh6opt_str, "Unknown", type)));
337 ND_PRINT((ndo," (%u)", optlen + 4 ));
338 if (i + 4 + optlen > length)
339 return -1;
340
341 switch (type) {
342 case DH6OPT_DNS_SERVERS:
343 case DH6OPT_SNTP_SERVERS: {
344 if (optlen % 16 != 0) {
345 ND_PRINT((ndo, " %s", istr));
346 return -1;
347 }
348 for (t = 0; t < optlen; t += 16)
349 ND_PRINT((ndo, " %s", ip6addr_string(ndo, value + t)));
350 }
351 break;
352 case DH6OPT_DOMAIN_LIST: {
353 const u_char *tp = value;
354 while (tp < value + optlen) {
355 ND_PRINT((ndo, " "));
356 if ((tp = ns_nprint(ndo, tp, value + optlen)) == NULL)
357 return -1;
358 }
359 }
360 break;
361 }
362
363 i += 4 + optlen;
364 }
365 return 0;
366 }
367
368 /* Determine in-line mode */
369 static int
370 is_in_line(netdissect_options *ndo, int indent)
371 {
372 return indent - 1 >= ndo->ndo_vflag && ndo->ndo_vflag < 3;
373 }
374
375 static void
376 print_type_in_line(netdissect_options *ndo,
377 uint32_t type, int count, int indent, int *first_one)
378 {
379 if (count > 0) {
380 if (*first_one) {
381 *first_one = 0;
382 if (indent > 1) {
383 u_int t;
384 ND_PRINT((ndo, "\n"));
385 for (t = indent; t > 0; t--)
386 ND_PRINT((ndo, "\t"));
387 } else {
388 ND_PRINT((ndo, " "));
389 }
390 } else {
391 ND_PRINT((ndo, ", "));
392 }
393 ND_PRINT((ndo, "%s", tok2str(type_values, "Easter Egg", type)));
394 if (count > 1)
395 ND_PRINT((ndo, " (x%d)", count));
396 }
397 }
398
399 void
400 hncp_print_rec(netdissect_options *ndo,
401 const u_char *cp, u_int length, int indent)
402 {
403 const int in_line = is_in_line(ndo, indent);
404 int first_one = 1;
405
406 u_int i, t;
407
408 uint32_t last_type_mask = 0xffffffffU;
409 int last_type_count = -1;
410
411 const u_char *tlv, *value;
412 uint16_t type, bodylen;
413 uint32_t type_mask;
414
415 i = 0;
416 while (i < length) {
417 tlv = cp + i;
418
419 if (!in_line) {
420 ND_PRINT((ndo, "\n"));
421 for (t = indent; t > 0; t--)
422 ND_PRINT((ndo, "\t"));
423 }
424
425 ND_TCHECK2(*tlv, 4);
426 if (i + 4 > length)
427 goto invalid;
428
429 type = EXTRACT_16BITS(tlv);
430 bodylen = EXTRACT_16BITS(tlv + 2);
431 value = tlv + 4;
432 ND_TCHECK2(*value, bodylen);
433 if (i + bodylen + 4 > length)
434 goto invalid;
435
436 type_mask =
437 (type == 0) ? RANGE_DNCP_RESERVED:
438 (44 <= type && type <= 511) ? RANGE_HNCP_UNASSIGNED:
439 (768 <= type && type <= 1023) ? RANGE_DNCP_PRIVATE_USE:
440 RANGE_DNCP_FUTURE_USE;
441 if (type == 6 || type == 7)
442 type_mask = RANGE_DNCP_FUTURE_USE;
443
444 /* defined types */
445 {
446 t = 0;
447 while (1) {
448 u_int key = type_values[t++].v;
449 if (key > 0xffff)
450 break;
451 if (key == type) {
452 type_mask = type;
453 break;
454 }
455 }
456 }
457
458 if (in_line) {
459 if (last_type_mask == type_mask) {
460 last_type_count++;
461 } else {
462 print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one);
463 last_type_mask = type_mask;
464 last_type_count = 1;
465 }
466
467 goto skip_multiline;
468 }
469
470 ND_PRINT((ndo,"%s", tok2str(type_values, "Easter Egg (42)", type_mask) ));
471 if (type_mask > 0xffff)
472 ND_PRINT((ndo,": type=%u", type ));
473 ND_PRINT((ndo," (%u)", bodylen + 4 ));
474
475 switch (type_mask) {
476
477 case DNCP_REQUEST_NETWORK_STATE: {
478 if (bodylen != 0)
479 ND_PRINT((ndo, " %s", istr));
480 }
481 break;
482
483 case DNCP_REQUEST_NODE_STATE: {
484 const char *node_identifier;
485 if (bodylen != 4) {
486 ND_PRINT((ndo, " %s", istr));
487 break;
488 }
489 node_identifier = format_nid(value);
490 ND_PRINT((ndo, " NID: %s", node_identifier));
491 }
492 break;
493
494 case DNCP_NODE_ENDPOINT: {
495 const char *node_identifier;
496 uint32_t endpoint_identifier;
497 if (bodylen != 8) {
498 ND_PRINT((ndo, " %s", istr));
499 break;
500 }
501 node_identifier = format_nid(value);
502 endpoint_identifier = EXTRACT_32BITS(value + 4);
503 ND_PRINT((ndo, " NID: %s EPID: %08x",
504 node_identifier,
505 endpoint_identifier
506 ));
507 }
508 break;
509
510 case DNCP_NETWORK_STATE: {
511 uint64_t hash;
512 if (bodylen != 8) {
513 ND_PRINT((ndo, " %s", istr));
514 break;
515 }
516 hash = EXTRACT_64BITS(value);
517 ND_PRINT((ndo, " hash: %016" PRIx64, hash));
518 }
519 break;
520
521 case DNCP_NODE_STATE: {
522 const char *node_identifier, *interval;
523 uint32_t sequence_number;
524 uint64_t hash;
525 if (bodylen < 20) {
526 ND_PRINT((ndo, " %s", istr));
527 break;
528 }
529 node_identifier = format_nid(value);
530 sequence_number = EXTRACT_32BITS(value + 4);
531 interval = format_interval(EXTRACT_32BITS(value + 8));
532 hash = EXTRACT_64BITS(value + 12);
533 ND_PRINT((ndo, " NID: %s seqno: %u %s hash: %016" PRIx64,
534 node_identifier,
535 sequence_number,
536 interval,
537 hash
538 ));
539 hncp_print_rec(ndo, value+20, bodylen-20, indent+1);
540 }
541 break;
542
543 case DNCP_PEER: {
544 const char *peer_node_identifier;
545 uint32_t peer_endpoint_identifier, endpoint_identifier;
546 if (bodylen != 12) {
547 ND_PRINT((ndo, " %s", istr));
548 break;
549 }
550 peer_node_identifier = format_nid(value);
551 peer_endpoint_identifier = EXTRACT_32BITS(value + 4);
552 endpoint_identifier = EXTRACT_32BITS(value + 8);
553 ND_PRINT((ndo, " Peer-NID: %s Peer-EPID: %08x Local-EPID: %08x",
554 peer_node_identifier,
555 peer_endpoint_identifier,
556 endpoint_identifier
557 ));
558 }
559 break;
560
561 case DNCP_KEEP_ALIVE_INTERVAL: {
562 uint32_t endpoint_identifier;
563 const char *interval;
564 if (bodylen < 8) {
565 ND_PRINT((ndo, " %s", istr));
566 break;
567 }
568 endpoint_identifier = EXTRACT_32BITS(value);
569 interval = format_interval(EXTRACT_32BITS(value + 4));
570 ND_PRINT((ndo, " EPID: %08x Interval: %s",
571 endpoint_identifier,
572 interval
573 ));
574 }
575 break;
576
577 case DNCP_TRUST_VERDICT: {
578 if (bodylen <= 36) {
579 ND_PRINT((ndo, " %s", istr));
580 break;
581 }
582 ND_PRINT((ndo, " Verdict: %u Fingerprint: %s Common Name: ",
583 *value,
584 format_256(value + 4)));
585 safeputs(ndo, value + 36, bodylen - 36);
586 }
587 break;
588
589 case HNCP_HNCP_VERSION: {
590 uint16_t capabilities;
591 uint8_t M, P, H, L;
592 if (bodylen < 5) {
593 ND_PRINT((ndo, " %s", istr));
594 break;
595 }
596 capabilities = EXTRACT_16BITS(value + 2);
597 M = (uint8_t)((capabilities >> 12) & 0xf);
598 P = (uint8_t)((capabilities >> 8) & 0xf);
599 H = (uint8_t)((capabilities >> 4) & 0xf);
600 L = (uint8_t)(capabilities & 0xf);
601 ND_PRINT((ndo, " M: %u P: %u H: %u L: %u User-agent: ",
602 M, P, H, L
603 ));
604 safeputs(ndo, value + 4, bodylen - 4);
605 }
606 break;
607
608 case HNCP_EXTERNAL_CONNECTION: {
609 /* Container TLV */
610 hncp_print_rec(ndo, value, bodylen, indent+1);
611 }
612 break;
613
614 case HNCP_DELEGATED_PREFIX: {
615 int l;
616 if (bodylen < 9 || bodylen < 9 + (value[8] + 7) / 8) {
617 ND_PRINT((ndo, " %s", istr));
618 break;
619 }
620 ND_PRINT((ndo, " VLSO: %s PLSO: %s Prefix: ",
621 format_interval(EXTRACT_32BITS(value)),
622 format_interval(EXTRACT_32BITS(value + 4))
623 ));
624 l = print_prefix(ndo, value + 8, bodylen - 8);
625 if (l == -1) {
626 ND_PRINT((ndo, "(length is invalid)"));
627 break;
628 }
629 if (l < 0) {
630 /*
631 * We've already checked that we've captured the
632 * entire TLV, based on its length, so this will
633 * either be -1, meaning "the prefix length is
634 * greater than the longest possible address of
635 * that type" (i.e., > 32 for IPv4 or > 128 for
636 * IPv6", or -3, meaning "the prefix runs past
637 * the end of the TLV".
638 */
639 ND_PRINT((ndo, " %s", istr));
640 break;
641 }
642 l += 8 + (-l & 3);
643
644 if (bodylen >= l)
645 hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
646 }
647 break;
648
649 case HNCP_PREFIX_POLICY: {
650 uint8_t policy;
651 int l;
652 if (bodylen < 1) {
653 ND_PRINT((ndo, " %s", istr));
654 break;
655 }
656 policy = value[0];
657 ND_PRINT((ndo, " type: "));
658 if (policy == 0) {
659 if (bodylen != 1) {
660 ND_PRINT((ndo, " %s", istr));
661 break;
662 }
663 ND_PRINT((ndo, "Internet connectivity"));
664 } else if (policy >= 1 && policy <= 128) {
665 ND_PRINT((ndo, "Dest-Prefix: "));
666 l = print_prefix(ndo, value, bodylen);
667 if (l == -1) {
668 ND_PRINT((ndo, "(length is invalid)"));
669 break;
670 }
671 if (l < 0) {
672 /*
673 * We've already checked that we've captured the
674 * entire TLV, based on its length, so this will
675 * either be -1, meaning "the prefix length is
676 * greater than the longest possible address of
677 * that type" (i.e., > 32 for IPv4 or > 128 for
678 * IPv6", or -3, meaning "the prefix runs past
679 * the end of the TLV".
680 */
681 ND_PRINT((ndo, " %s", istr));
682 break;
683 }
684 } else if (policy == 129) {
685 ND_PRINT((ndo, "DNS domain: "));
686 print_dns_label(ndo, value+1, bodylen-1, 1);
687 } else if (policy == 130) {
688 ND_PRINT((ndo, "Opaque UTF-8: "));
689 safeputs(ndo, value + 1, bodylen - 1);
690 } else if (policy == 131) {
691 if (bodylen != 1) {
692 ND_PRINT((ndo, " %s", istr));
693 break;
694 }
695 ND_PRINT((ndo, "Restrictive assignment"));
696 } else if (policy >= 132) {
697 ND_PRINT((ndo, "Unknown (%u)", policy)); /* Reserved for future additions */
698 }
699 }
700 break;
701
702 case HNCP_DHCPV4_DATA: {
703 if (bodylen == 0) {
704 ND_PRINT((ndo, " %s", istr));
705 break;
706 }
707 if (dhcpv4_print(ndo, value, bodylen, indent+1) != 0)
708 goto invalid;
709 }
710 break;
711
712 case HNCP_DHCPV6_DATA: {
713 if (bodylen == 0) {
714 ND_PRINT((ndo, " %s", istr));
715 break;
716 }
717 if (dhcpv6_print(ndo, value, bodylen, indent+1) != 0) {
718 ND_PRINT((ndo, " %s", istr));
719 break;
720 }
721 }
722 break;
723
724 case HNCP_ASSIGNED_PREFIX: {
725 uint8_t prty;
726 int l;
727 if (bodylen < 6 || bodylen < 6 + (value[5] + 7) / 8) {
728 ND_PRINT((ndo, " %s", istr));
729 break;
730 }
731 prty = (uint8_t)(value[4] & 0xf);
732 ND_PRINT((ndo, " EPID: %08x Prty: %u",
733 EXTRACT_32BITS(value),
734 prty
735 ));
736 ND_PRINT((ndo, " Prefix: "));
737 if ((l = print_prefix(ndo, value + 5, bodylen - 5)) < 0) {
738 ND_PRINT((ndo, " %s", istr));
739 break;
740 }
741 l += 5;
742 l += -l & 3;
743
744 if (bodylen >= l)
745 hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
746 }
747 break;
748
749 case HNCP_NODE_ADDRESS: {
750 uint32_t endpoint_identifier;
751 const char *ip_address;
752 if (bodylen < 20) {
753 ND_PRINT((ndo, " %s", istr));
754 break;
755 }
756 endpoint_identifier = EXTRACT_32BITS(value);
757 ip_address = format_ip6addr(ndo, value + 4);
758 ND_PRINT((ndo, " EPID: %08x IP Address: %s",
759 endpoint_identifier,
760 ip_address
761 ));
762
763 hncp_print_rec(ndo, value + 20, bodylen - 20, indent+1);
764 }
765 break;
766
767 case HNCP_DNS_DELEGATED_ZONE: {
768 const char *ip_address;
769 int len;
770 if (bodylen < 17) {
771 ND_PRINT((ndo, " %s", istr));
772 break;
773 }
774 ip_address = format_ip6addr(ndo, value);
775 ND_PRINT((ndo, " IP-Address: %s %c%c%c ",
776 ip_address,
777 (value[16] & 4) ? 'l' : '-',
778 (value[16] & 2) ? 'b' : '-',
779 (value[16] & 1) ? 's' : '-'
780 ));
781 len = print_dns_label(ndo, value+17, bodylen-17, 1);
782 if (len < 0) {
783 ND_PRINT((ndo, " %s", istr));
784 break;
785 }
786 len += 17;
787 len += -len & 3;
788 if (bodylen >= len)
789 hncp_print_rec(ndo, value+len, bodylen-len, indent+1);
790 }
791 break;
792
793 case HNCP_DOMAIN_NAME: {
794 if (bodylen == 0) {
795 ND_PRINT((ndo, " %s", istr));
796 break;
797 }
798 ND_PRINT((ndo, " Domain: "));
799 print_dns_label(ndo, value, bodylen, 1);
800 }
801 break;
802
803 case HNCP_NODE_NAME: {
804 u_int l;
805 if (bodylen < 17) {
806 ND_PRINT((ndo, " %s", istr));
807 break;
808 }
809 l = value[16];
810 if (bodylen < 17 + l) {
811 ND_PRINT((ndo, " %s", istr));
812 break;
813 }
814 ND_PRINT((ndo, " IP-Address: %s Name: ",
815 format_ip6addr(ndo, value)
816 ));
817 if (l < 64) {
818 safeputchar(ndo, '"');
819 safeputs(ndo, value + 17, l);
820 safeputchar(ndo, '"');
821 } else {
822 ND_PRINT((ndo, "%s", istr));
823 }
824 l += 17;
825 l += -l & 3;
826 if (bodylen >= l)
827 hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
828 }
829 break;
830
831 case HNCP_MANAGED_PSK: {
832 if (bodylen < 32) {
833 ND_PRINT((ndo, " %s", istr));
834 break;
835 }
836 ND_PRINT((ndo, " PSK: %s", format_256(value)));
837 hncp_print_rec(ndo, value + 32, bodylen - 32, indent+1);
838 }
839 break;
840
841 case RANGE_DNCP_RESERVED:
842 case RANGE_HNCP_UNASSIGNED:
843 case RANGE_DNCP_PRIVATE_USE:
844 case RANGE_DNCP_FUTURE_USE:
845 break;
846
847 }
848 skip_multiline:
849
850 i += 4 + bodylen + (-bodylen & 3);
851 }
852 print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one);
853
854 return;
855
856 trunc:
857 ND_PRINT((ndo, "%s", "[|hncp]"));
858 return;
859
860 invalid:
861 ND_PRINT((ndo, "%s", istr));
862 return;
863 }
Unleashed OS