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source: rtems-libbsd/freebsd/contrib/tcpdump/print-hncp.c @ 24631e2

5

Last change on this file since 24631e2 was 24631e2, checked in by Sebastian Huber <sebastian.huber@…>, on 03/11/19 at 08:33:28

tcpdump: Move static variables to special section

This fixes some issues if tcpdump is invoked a second time.

Property mode set to 100644

File size: 26.7 KB

Line
1	#include <machine/rtems-bsd-user-space.h>
2
3	#ifdef __rtems__
4	#include <machine/rtems-bsd-program.h>
5	#include "rtems-bsd-tcpdump-namespace.h"
6	#endif /* __rtems__ */
7	/*
8	* Copyright (c) 2016 Antonin DÃ©cimo, Jean-RaphaÃ«l Gaglione
9	*
10	* Redistribution and use in source and binary forms, with or without
11	* modification, are permitted provided that the following conditions
12	* are met:
13	* 1. Redistributions of source code must retain the above copyright
14	* notice, this list of conditions and the following disclaimer.
15	* 2. Redistributions in binary form must reproduce the above copyright
16	* notice, this list of conditions and the following disclaimer in the
17	* documentation and/or other materials provided with the distribution.
18	* 3. Neither the name of the project nor the names of its contributors
19	* may be used to endorse or promote products derived from this software
20	* without specific prior written permission.
21	*
22	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
23	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32	* SUCH DAMAGE.
33	*/
34
35	/* \summary: Home Networking Control Protocol (HNCP) printer */
36
37	#ifdef HAVE_CONFIG_H
38	#include "config.h"
39	#endif
40
41	#include <netdissect-stdinc.h>
42
43	#include <stdlib.h>
44	#include <string.h>
45
46	#include "netdissect.h"
47	#include "addrtoname.h"
48	#include "extract.h"
49
50	static void
51	hncp_print_rec(netdissect_options *ndo,
52	const u_char *cp, u_int length, int indent);
53
54	void
55	hncp_print(netdissect_options *ndo,
56	const u_char *cp, u_int length)
57	{
58	ND_PRINT((ndo, "hncp (%d)", length));
59	hncp_print_rec(ndo, cp, length, 1);
60	}
61
62	/* RFC7787 */
63	#define DNCP_REQUEST_NETWORK_STATE 1
64	#define DNCP_REQUEST_NODE_STATE 2
65	#define DNCP_NODE_ENDPOINT 3
66	#define DNCP_NETWORK_STATE 4
67	#define DNCP_NODE_STATE 5
68	#define DNCP_PEER 8
69	#define DNCP_KEEP_ALIVE_INTERVAL 9
70	#define DNCP_TRUST_VERDICT 10
71
72	/* RFC7788 */
73	#define HNCP_HNCP_VERSION 32
74	#define HNCP_EXTERNAL_CONNECTION 33
75	#define HNCP_DELEGATED_PREFIX 34
76	#define HNCP_PREFIX_POLICY 43
77	#define HNCP_DHCPV4_DATA 37
78	#define HNCP_DHCPV6_DATA 38
79	#define HNCP_ASSIGNED_PREFIX 35
80	#define HNCP_NODE_ADDRESS 36
81	#define HNCP_DNS_DELEGATED_ZONE 39
82	#define HNCP_DOMAIN_NAME 40
83	#define HNCP_NODE_NAME 41
84	#define HNCP_MANAGED_PSK 42
85
86	/* See type_mask in hncp_print_rec below */
87	#define RANGE_DNCP_RESERVED 0x10000
88	#define RANGE_HNCP_UNASSIGNED 0x10001
89	#define RANGE_DNCP_PRIVATE_USE 0x10002
90	#define RANGE_DNCP_FUTURE_USE 0x10003
91
92	static const struct tok type_values[] = {
93	{ DNCP_REQUEST_NETWORK_STATE, "Request network state" },
94	{ DNCP_REQUEST_NODE_STATE, "Request node state" },
95	{ DNCP_NODE_ENDPOINT, "Node endpoint" },
96	{ DNCP_NETWORK_STATE, "Network state" },
97	{ DNCP_NODE_STATE, "Node state" },
98	{ DNCP_PEER, "Peer" },
99	{ DNCP_KEEP_ALIVE_INTERVAL, "Keep-alive interval" },
100	{ DNCP_TRUST_VERDICT, "Trust-Verdict" },
101
102	{ HNCP_HNCP_VERSION, "HNCP-Version" },
103	{ HNCP_EXTERNAL_CONNECTION, "External-Connection" },
104	{ HNCP_DELEGATED_PREFIX, "Delegated-Prefix" },
105	{ HNCP_PREFIX_POLICY, "Prefix-Policy" },
106	{ HNCP_DHCPV4_DATA, "DHCPv4-Data" },
107	{ HNCP_DHCPV6_DATA, "DHCPv6-Data" },
108	{ HNCP_ASSIGNED_PREFIX, "Assigned-Prefix" },
109	{ HNCP_NODE_ADDRESS, "Node-Address" },
110	{ HNCP_DNS_DELEGATED_ZONE, "DNS-Delegated-Zone" },
111	{ HNCP_DOMAIN_NAME, "Domain-Name" },
112	{ HNCP_NODE_NAME, "Node-Name" },
113	{ HNCP_MANAGED_PSK, "Managed-PSK" },
114
115	{ RANGE_DNCP_RESERVED, "Reserved" },
116	{ RANGE_HNCP_UNASSIGNED, "Unassigned" },
117	{ RANGE_DNCP_PRIVATE_USE, "Private use" },
118	{ RANGE_DNCP_FUTURE_USE, "Future use" },
119
120	{ 0, NULL}
121	};
122
123	#define DH4OPT_DNS_SERVERS 6 /* RFC2132 */
124	#define DH4OPT_NTP_SERVERS 42 /* RFC2132 */
125	#define DH4OPT_DOMAIN_SEARCH 119 /* RFC3397 */
126
127	static const struct tok dh4opt_str[] = {
128	{ DH4OPT_DNS_SERVERS, "DNS-server" },
129	{ DH4OPT_NTP_SERVERS, "NTP-server"},
130	{ DH4OPT_DOMAIN_SEARCH, "DNS-search" },
131	{ 0, NULL }
132	};
133
134	#define DH6OPT_DNS_SERVERS 23 /* RFC3646 */
135	#define DH6OPT_DOMAIN_LIST 24 /* RFC3646 */
136	#define DH6OPT_SNTP_SERVERS 31 /* RFC4075 */
137
138	static const struct tok dh6opt_str[] = {
139	{ DH6OPT_DNS_SERVERS, "DNS-server" },
140	{ DH6OPT_DOMAIN_LIST, "DNS-search-list" },
141	{ DH6OPT_SNTP_SERVERS, "SNTP-servers" },
142	{ 0, NULL }
143	};
144
145	/*
146	* For IPv4-mapped IPv6 addresses, length of the prefix that precedes
147	* the 4 bytes of IPv4 address at the end of the IPv6 address.
148	*/
149	#define IPV4_MAPPED_HEADING_LEN 12
150
151	/*
152	* Is an IPv6 address an IPv4-mapped address?
153	*/
154	static inline int
155	is_ipv4_mapped_address(const u_char *addr)
156	{
157	/* The value of the prefix */
158	static const u_char ipv4_mapped_heading[IPV4_MAPPED_HEADING_LEN] =
159	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF };
160
161	return memcmp(addr, ipv4_mapped_heading, IPV4_MAPPED_HEADING_LEN) == 0;
162	}
163
164	static const char *
165	format_nid(const u_char *data)
166	{
167	static char buf[4][11+5];
168	#ifdef __rtems__
169	__section(".rtemsrwset.bsd_prog_tcpdump.content")
170	#endif /* __rtems__ */
171	static int i = 0;
172	i = (i + 1) % 4;
173	snprintf(buf[i], 16, "%02x:%02x:%02x:%02x",
174	data[0], data[1], data[2], data[3]);
175	return buf[i];
176	}
177
178	static const char *
179	format_256(const u_char *data)
180	{
181	static char buf[4][64+5];
182	#ifdef __rtems__
183	__section(".rtemsrwset.bsd_prog_tcpdump.content")
184	#endif /* __rtems__ */
185	static int i = 0;
186	i = (i + 1) % 4;
187	snprintf(buf[i], 28, "%016" PRIx64 "%016" PRIx64 "%016" PRIx64 "%016" PRIx64,
188	EXTRACT_64BITS(data),
189	EXTRACT_64BITS(data + 8),
190	EXTRACT_64BITS(data + 16),
191	EXTRACT_64BITS(data + 24)
192	);
193	return buf[i];
194	}
195
196	static const char *
197	format_interval(const uint32_t n)
198	{
199	static char buf[4][sizeof("0000000.000s")];
200	#ifdef __rtems__
201	__section(".rtemsrwset.bsd_prog_tcpdump.content")
202	#endif /* __rtems__ */
203	static int i = 0;
204	i = (i + 1) % 4;
205	snprintf(buf[i], sizeof(buf[i]), "%u.%03us", n / 1000, n % 1000);
206	return buf[i];
207	}
208
209	static const char *
210	format_ip6addr(netdissect_options ndo, const u_char cp)
211	{
212	if (is_ipv4_mapped_address(cp))
213	return ipaddr_string(ndo, cp + IPV4_MAPPED_HEADING_LEN);
214	else
215	return ip6addr_string(ndo, cp);
216	}
217
218	static int
219	print_prefix(netdissect_options ndo, const u_char prefix, u_int max_length)
220	{
221	int plenbytes;
222	char buf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx::/128")];
223
224	if (prefix[0] >= 96 && max_length >= IPV4_MAPPED_HEADING_LEN + 1 &&
225	is_ipv4_mapped_address(&prefix[1])) {
226	struct in_addr addr;
227	u_int plen;
228
229	plen = prefix[0]-96;
230	if (32 < plen)
231	return -1;
232	max_length -= 1;
233
234	memset(&addr, 0, sizeof(addr));
235	plenbytes = (plen + 7) / 8;
236	if (max_length < (u_int)plenbytes + IPV4_MAPPED_HEADING_LEN)
237	return -3;
238	memcpy(&addr, &prefix[1 + IPV4_MAPPED_HEADING_LEN], plenbytes);
239	if (plen % 8) {
240	((u_char *)&addr)[plenbytes - 1] &=
241	((0xff00 >> (plen % 8)) & 0xff);
242	}
243	snprintf(buf, sizeof(buf), "%s/%d", ipaddr_string(ndo, &addr), plen);
244	plenbytes += 1 + IPV4_MAPPED_HEADING_LEN;
245	} else {
246	plenbytes = decode_prefix6(ndo, prefix, max_length, buf, sizeof(buf));
247	}
248
249	ND_PRINT((ndo, "%s", buf));
250	return plenbytes;
251	}
252
253	static int
254	print_dns_label(netdissect_options *ndo,
255	const u_char *cp, u_int max_length, int print)
256	{
257	u_int length = 0;
258	while (length < max_length) {
259	u_int lab_length = cp[length++];
260	if (lab_length == 0)
261	return (int)length;
262	if (length > 1 && print)
263	safeputchar(ndo, '.');
264	if (length+lab_length > max_length) {
265	if (print)
266	safeputs(ndo, cp+length, max_length-length);
267	break;
268	}
269	if (print)
270	safeputs(ndo, cp+length, lab_length);
271	length += lab_length;
272	}
273	if (print)
274	ND_PRINT((ndo, "[\|DNS]"));
275	return -1;
276	}
277
278	static int
279	dhcpv4_print(netdissect_options *ndo,
280	const u_char *cp, u_int length, int indent)
281	{
282	u_int i, t;
283	const u_char tlv, value;
284	uint8_t type, optlen;
285
286	i = 0;
287	while (i < length) {
288	if (i + 2 > length)
289	return -1;
290	tlv = cp + i;
291	type = (uint8_t)tlv[0];
292	optlen = (uint8_t)tlv[1];
293	value = tlv + 2;
294
295	ND_PRINT((ndo, "\n"));
296	for (t = indent; t > 0; t--)
297	ND_PRINT((ndo, "\t"));
298
299	ND_PRINT((ndo, "%s", tok2str(dh4opt_str, "Unknown", type)));
300	ND_PRINT((ndo," (%u)", optlen + 2 ));
301	if (i + 2 + optlen > length)
302	return -1;
303
304	switch (type) {
305	case DH4OPT_DNS_SERVERS:
306	case DH4OPT_NTP_SERVERS: {
307	if (optlen < 4 \|\| optlen % 4 != 0) {
308	return -1;
309	}
310	for (t = 0; t < optlen; t += 4)
311	ND_PRINT((ndo, " %s", ipaddr_string(ndo, value + t)));
312	}
313	break;
314	case DH4OPT_DOMAIN_SEARCH: {
315	const u_char *tp = value;
316	while (tp < value + optlen) {
317	ND_PRINT((ndo, " "));
318	if ((tp = ns_nprint(ndo, tp, value + optlen)) == NULL)
319	return -1;
320	}
321	}
322	break;
323	}
324
325	i += 2 + optlen;
326	}
327	return 0;
328	}
329
330	static int
331	dhcpv6_print(netdissect_options *ndo,
332	const u_char *cp, u_int length, int indent)
333	{
334	u_int i, t;
335	const u_char tlv, value;
336	uint16_t type, optlen;
337
338	i = 0;
339	while (i < length) {
340	if (i + 4 > length)
341	return -1;
342	tlv = cp + i;
343	type = EXTRACT_16BITS(tlv);
344	optlen = EXTRACT_16BITS(tlv + 2);
345	value = tlv + 4;
346
347	ND_PRINT((ndo, "\n"));
348	for (t = indent; t > 0; t--)
349	ND_PRINT((ndo, "\t"));
350
351	ND_PRINT((ndo, "%s", tok2str(dh6opt_str, "Unknown", type)));
352	ND_PRINT((ndo," (%u)", optlen + 4 ));
353	if (i + 4 + optlen > length)
354	return -1;
355
356	switch (type) {
357	case DH6OPT_DNS_SERVERS:
358	case DH6OPT_SNTP_SERVERS: {
359	if (optlen % 16 != 0) {
360	ND_PRINT((ndo, " %s", istr));
361	return -1;
362	}
363	for (t = 0; t < optlen; t += 16)
364	ND_PRINT((ndo, " %s", ip6addr_string(ndo, value + t)));
365	}
366	break;
367	case DH6OPT_DOMAIN_LIST: {
368	const u_char *tp = value;
369	while (tp < value + optlen) {
370	ND_PRINT((ndo, " "));
371	if ((tp = ns_nprint(ndo, tp, value + optlen)) == NULL)
372	return -1;
373	}
374	}
375	break;
376	}
377
378	i += 4 + optlen;
379	}
380	return 0;
381	}
382
383	/* Determine in-line mode */
384	static int
385	is_in_line(netdissect_options *ndo, int indent)
386	{
387	return indent - 1 >= ndo->ndo_vflag && ndo->ndo_vflag < 3;
388	}
389
390	static void
391	print_type_in_line(netdissect_options *ndo,
392	uint32_t type, int count, int indent, int *first_one)
393	{
394	if (count > 0) {
395	if (*first_one) {
396	*first_one = 0;
397	if (indent > 1) {
398	u_int t;
399	ND_PRINT((ndo, "\n"));
400	for (t = indent; t > 0; t--)
401	ND_PRINT((ndo, "\t"));
402	} else {
403	ND_PRINT((ndo, " "));
404	}
405	} else {
406	ND_PRINT((ndo, ", "));
407	}
408	ND_PRINT((ndo, "%s", tok2str(type_values, "Easter Egg", type)));
409	if (count > 1)
410	ND_PRINT((ndo, " (x%d)", count));
411	}
412	}
413
414	void
415	hncp_print_rec(netdissect_options *ndo,
416	const u_char *cp, u_int length, int indent)
417	{
418	const int in_line = is_in_line(ndo, indent);
419	int first_one = 1;
420
421	u_int i, t;
422
423	uint32_t last_type_mask = 0xffffffffU;
424	int last_type_count = -1;
425
426	const u_char tlv, value;
427	uint16_t type, bodylen;
428	uint32_t type_mask;
429
430	i = 0;
431	while (i < length) {
432	tlv = cp + i;
433
434	if (!in_line) {
435	ND_PRINT((ndo, "\n"));
436	for (t = indent; t > 0; t--)
437	ND_PRINT((ndo, "\t"));
438	}
439
440	ND_TCHECK2(*tlv, 4);
441	if (i + 4 > length)
442	goto invalid;
443
444	type = EXTRACT_16BITS(tlv);
445	bodylen = EXTRACT_16BITS(tlv + 2);
446	value = tlv + 4;
447	ND_TCHECK2(*value, bodylen);
448	if (i + bodylen + 4 > length)
449	goto invalid;
450
451	type_mask =
452	(type == 0) ? RANGE_DNCP_RESERVED:
453	(44 <= type && type <= 511) ? RANGE_HNCP_UNASSIGNED:
454	(768 <= type && type <= 1023) ? RANGE_DNCP_PRIVATE_USE:
455	RANGE_DNCP_FUTURE_USE;
456	if (type == 6 \|\| type == 7)
457	type_mask = RANGE_DNCP_FUTURE_USE;
458
459	/* defined types */
460	{
461	t = 0;
462	while (1) {
463	u_int key = type_values[t++].v;
464	if (key > 0xffff)
465	break;
466	if (key == type) {
467	type_mask = type;
468	break;
469	}
470	}
471	}
472
473	if (in_line) {
474	if (last_type_mask == type_mask) {
475	last_type_count++;
476	} else {
477	print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one);
478	last_type_mask = type_mask;
479	last_type_count = 1;
480	}
481
482	goto skip_multiline;
483	}
484
485	ND_PRINT((ndo,"%s", tok2str(type_values, "Easter Egg (42)", type_mask) ));
486	if (type_mask > 0xffff)
487	ND_PRINT((ndo,": type=%u", type ));
488	ND_PRINT((ndo," (%u)", bodylen + 4 ));
489
490	switch (type_mask) {
491
492	case DNCP_REQUEST_NETWORK_STATE: {
493	if (bodylen != 0)
494	ND_PRINT((ndo, " %s", istr));
495	}
496	break;
497
498	case DNCP_REQUEST_NODE_STATE: {
499	const char *node_identifier;
500	if (bodylen != 4) {
501	ND_PRINT((ndo, " %s", istr));
502	break;
503	}
504	node_identifier = format_nid(value);
505	ND_PRINT((ndo, " NID: %s", node_identifier));
506	}
507	break;
508
509	case DNCP_NODE_ENDPOINT: {
510	const char *node_identifier;
511	uint32_t endpoint_identifier;
512	if (bodylen != 8) {
513	ND_PRINT((ndo, " %s", istr));
514	break;
515	}
516	node_identifier = format_nid(value);
517	endpoint_identifier = EXTRACT_32BITS(value + 4);
518	ND_PRINT((ndo, " NID: %s EPID: %08x",
519	node_identifier,
520	endpoint_identifier
521	));
522	}
523	break;
524
525	case DNCP_NETWORK_STATE: {
526	uint64_t hash;
527	if (bodylen != 8) {
528	ND_PRINT((ndo, " %s", istr));
529	break;
530	}
531	hash = EXTRACT_64BITS(value);
532	ND_PRINT((ndo, " hash: %016" PRIx64, hash));
533	}
534	break;
535
536	case DNCP_NODE_STATE: {
537	const char node_identifier, interval;
538	uint32_t sequence_number;
539	uint64_t hash;
540	if (bodylen < 20) {
541	ND_PRINT((ndo, " %s", istr));
542	break;
543	}
544	node_identifier = format_nid(value);
545	sequence_number = EXTRACT_32BITS(value + 4);
546	interval = format_interval(EXTRACT_32BITS(value + 8));
547	hash = EXTRACT_64BITS(value + 12);
548	ND_PRINT((ndo, " NID: %s seqno: %u %s hash: %016" PRIx64,
549	node_identifier,
550	sequence_number,
551	interval,
552	hash
553	));
554	hncp_print_rec(ndo, value+20, bodylen-20, indent+1);
555	}
556	break;
557
558	case DNCP_PEER: {
559	const char *peer_node_identifier;
560	uint32_t peer_endpoint_identifier, endpoint_identifier;
561	if (bodylen != 12) {
562	ND_PRINT((ndo, " %s", istr));
563	break;
564	}
565	peer_node_identifier = format_nid(value);
566	peer_endpoint_identifier = EXTRACT_32BITS(value + 4);
567	endpoint_identifier = EXTRACT_32BITS(value + 8);
568	ND_PRINT((ndo, " Peer-NID: %s Peer-EPID: %08x Local-EPID: %08x",
569	peer_node_identifier,
570	peer_endpoint_identifier,
571	endpoint_identifier
572	));
573	}
574	break;
575
576	case DNCP_KEEP_ALIVE_INTERVAL: {
577	uint32_t endpoint_identifier;
578	const char *interval;
579	if (bodylen < 8) {
580	ND_PRINT((ndo, " %s", istr));
581	break;
582	}
583	endpoint_identifier = EXTRACT_32BITS(value);
584	interval = format_interval(EXTRACT_32BITS(value + 4));
585	ND_PRINT((ndo, " EPID: %08x Interval: %s",
586	endpoint_identifier,
587	interval
588	));
589	}
590	break;
591
592	case DNCP_TRUST_VERDICT: {
593	if (bodylen <= 36) {
594	ND_PRINT((ndo, " %s", istr));
595	break;
596	}
597	ND_PRINT((ndo, " Verdict: %u Fingerprint: %s Common Name: ",
598	*value,
599	format_256(value + 4)));
600	safeputs(ndo, value + 36, bodylen - 36);
601	}
602	break;
603
604	case HNCP_HNCP_VERSION: {
605	uint16_t capabilities;
606	uint8_t M, P, H, L;
607	if (bodylen < 5) {
608	ND_PRINT((ndo, " %s", istr));
609	break;
610	}
611	capabilities = EXTRACT_16BITS(value + 2);
612	M = (uint8_t)((capabilities >> 12) & 0xf);
613	P = (uint8_t)((capabilities >> 8) & 0xf);
614	H = (uint8_t)((capabilities >> 4) & 0xf);
615	L = (uint8_t)(capabilities & 0xf);
616	ND_PRINT((ndo, " M: %u P: %u H: %u L: %u User-agent: ",
617	M, P, H, L
618	));
619	safeputs(ndo, value + 4, bodylen - 4);
620	}
621	break;
622
623	case HNCP_EXTERNAL_CONNECTION: {
624	/* Container TLV */
625	hncp_print_rec(ndo, value, bodylen, indent+1);
626	}
627	break;
628
629	case HNCP_DELEGATED_PREFIX: {
630	int l;
631	if (bodylen < 9 \|\| bodylen < 9 + (value[8] + 7) / 8) {
632	ND_PRINT((ndo, " %s", istr));
633	break;
634	}
635	ND_PRINT((ndo, " VLSO: %s PLSO: %s Prefix: ",
636	format_interval(EXTRACT_32BITS(value)),
637	format_interval(EXTRACT_32BITS(value + 4))
638	));
639	l = print_prefix(ndo, value + 8, bodylen - 8);
640	if (l == -1) {
641	ND_PRINT((ndo, "(length is invalid)"));
642	break;
643	}
644	if (l < 0) {
645	/*
646	* We've already checked that we've captured the
647	* entire TLV, based on its length, so this will
648	* either be -1, meaning "the prefix length is
649	* greater than the longest possible address of
650	* that type" (i.e., > 32 for IPv4 or > 128 for
651	* IPv6", or -3, meaning "the prefix runs past
652	* the end of the TLV".
653	*/
654	ND_PRINT((ndo, " %s", istr));
655	break;
656	}
657	l += 8 + (-l & 3);
658
659	if (bodylen >= l)
660	hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
661	}
662	break;
663
664	case HNCP_PREFIX_POLICY: {
665	uint8_t policy;
666	int l;
667	if (bodylen < 1) {
668	ND_PRINT((ndo, " %s", istr));
669	break;
670	}
671	policy = value[0];
672	ND_PRINT((ndo, " type: "));
673	if (policy == 0) {
674	if (bodylen != 1) {
675	ND_PRINT((ndo, " %s", istr));
676	break;
677	}
678	ND_PRINT((ndo, "Internet connectivity"));
679	} else if (policy >= 1 && policy <= 128) {
680	ND_PRINT((ndo, "Dest-Prefix: "));
681	l = print_prefix(ndo, value, bodylen);
682	if (l == -1) {
683	ND_PRINT((ndo, "(length is invalid)"));
684	break;
685	}
686	if (l < 0) {
687	/*
688	* We've already checked that we've captured the
689	* entire TLV, based on its length, so this will
690	* either be -1, meaning "the prefix length is
691	* greater than the longest possible address of
692	* that type" (i.e., > 32 for IPv4 or > 128 for
693	* IPv6", or -3, meaning "the prefix runs past
694	* the end of the TLV".
695	*/
696	ND_PRINT((ndo, " %s", istr));
697	break;
698	}
699	} else if (policy == 129) {
700	ND_PRINT((ndo, "DNS domain: "));
701	print_dns_label(ndo, value+1, bodylen-1, 1);
702	} else if (policy == 130) {
703	ND_PRINT((ndo, "Opaque UTF-8: "));
704	safeputs(ndo, value + 1, bodylen - 1);
705	} else if (policy == 131) {
706	if (bodylen != 1) {
707	ND_PRINT((ndo, " %s", istr));
708	break;
709	}
710	ND_PRINT((ndo, "Restrictive assignment"));
711	} else if (policy >= 132) {
712	ND_PRINT((ndo, "Unknown (%u)", policy)); /* Reserved for future additions */
713	}
714	}
715	break;
716
717	case HNCP_DHCPV4_DATA: {
718	if (bodylen == 0) {
719	ND_PRINT((ndo, " %s", istr));
720	break;
721	}
722	if (dhcpv4_print(ndo, value, bodylen, indent+1) != 0)
723	goto invalid;
724	}
725	break;
726
727	case HNCP_DHCPV6_DATA: {
728	if (bodylen == 0) {
729	ND_PRINT((ndo, " %s", istr));
730	break;
731	}
732	if (dhcpv6_print(ndo, value, bodylen, indent+1) != 0) {
733	ND_PRINT((ndo, " %s", istr));
734	break;
735	}
736	}
737	break;
738
739	case HNCP_ASSIGNED_PREFIX: {
740	uint8_t prty;
741	int l;
742	if (bodylen < 6 \|\| bodylen < 6 + (value[5] + 7) / 8) {
743	ND_PRINT((ndo, " %s", istr));
744	break;
745	}
746	prty = (uint8_t)(value[4] & 0xf);
747	ND_PRINT((ndo, " EPID: %08x Prty: %u",
748	EXTRACT_32BITS(value),
749	prty
750	));
751	ND_PRINT((ndo, " Prefix: "));
752	if ((l = print_prefix(ndo, value + 5, bodylen - 5)) < 0) {
753	ND_PRINT((ndo, " %s", istr));
754	break;
755	}
756	l += 5;
757	l += -l & 3;
758
759	if (bodylen >= l)
760	hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
761	}
762	break;
763
764	case HNCP_NODE_ADDRESS: {
765	uint32_t endpoint_identifier;
766	const char *ip_address;
767	if (bodylen < 20) {
768	ND_PRINT((ndo, " %s", istr));
769	break;
770	}
771	endpoint_identifier = EXTRACT_32BITS(value);
772	ip_address = format_ip6addr(ndo, value + 4);
773	ND_PRINT((ndo, " EPID: %08x IP Address: %s",
774	endpoint_identifier,
775	ip_address
776	));
777
778	hncp_print_rec(ndo, value + 20, bodylen - 20, indent+1);
779	}
780	break;
781
782	case HNCP_DNS_DELEGATED_ZONE: {
783	const char *ip_address;
784	int len;
785	if (bodylen < 17) {
786	ND_PRINT((ndo, " %s", istr));
787	break;
788	}
789	ip_address = format_ip6addr(ndo, value);
790	ND_PRINT((ndo, " IP-Address: %s %c%c%c ",
791	ip_address,
792	(value[16] & 4) ? 'l' : '-',
793	(value[16] & 2) ? 'b' : '-',
794	(value[16] & 1) ? 's' : '-'
795	));
796	len = print_dns_label(ndo, value+17, bodylen-17, 1);
797	if (len < 0) {
798	ND_PRINT((ndo, " %s", istr));
799	break;
800	}
801	len += 17;
802	len += -len & 3;
803	if (bodylen >= len)
804	hncp_print_rec(ndo, value+len, bodylen-len, indent+1);
805	}
806	break;
807
808	case HNCP_DOMAIN_NAME: {
809	if (bodylen == 0) {
810	ND_PRINT((ndo, " %s", istr));
811	break;
812	}
813	ND_PRINT((ndo, " Domain: "));
814	print_dns_label(ndo, value, bodylen, 1);
815	}
816	break;
817
818	case HNCP_NODE_NAME: {
819	u_int l;
820	if (bodylen < 17) {
821	ND_PRINT((ndo, " %s", istr));
822	break;
823	}
824	l = value[16];
825	if (bodylen < 17 + l) {
826	ND_PRINT((ndo, " %s", istr));
827	break;
828	}
829	ND_PRINT((ndo, " IP-Address: %s Name: ",
830	format_ip6addr(ndo, value)
831	));
832	if (l < 64) {
833	safeputchar(ndo, '"');
834	safeputs(ndo, value + 17, l);
835	safeputchar(ndo, '"');
836	} else {
837	ND_PRINT((ndo, "%s", istr));
838	}
839	l += 17;
840	l += -l & 3;
841	if (bodylen >= l)
842	hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
843	}
844	break;
845
846	case HNCP_MANAGED_PSK: {
847	if (bodylen < 32) {
848	ND_PRINT((ndo, " %s", istr));
849	break;
850	}
851	ND_PRINT((ndo, " PSK: %s", format_256(value)));
852	hncp_print_rec(ndo, value + 32, bodylen - 32, indent+1);
853	}
854	break;
855
856	case RANGE_DNCP_RESERVED:
857	case RANGE_HNCP_UNASSIGNED:
858	case RANGE_DNCP_PRIVATE_USE:
859	case RANGE_DNCP_FUTURE_USE:
860	break;
861
862	}
863	skip_multiline:
864
865	i += 4 + bodylen + (-bodylen & 3);
866	}
867	print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one);
868
869	return;
870
871	trunc:
872	ND_PRINT((ndo, "%s", "[\|hncp]"));
873	return;
874
875	invalid:
876	ND_PRINT((ndo, "%s", istr));
877	return;
878	}
879	#ifdef __rtems__
880	#include "rtems-bsd-tcpdump-print-hncp-data.h"
881	#endif /* __rtems__ */

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