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ns_print.c @ e599318

4.1155-freebsd-126-freebsd-12freebsd-9.3

Last change on this file since e599318 was e599318, checked in by Sebastian Huber <sebastian.huber@…>, on 10/09/13 at 20:52:54

Update files to match FreeBSD layout

Add compatibility with Newlib header files. Some FreeBSD header files
are mapped by the translation script:

o rtems/bsd/sys/_types.h
o rtems/bsd/sys/errno.h
o rtems/bsd/sys/lock.h
o rtems/bsd/sys/param.h
o rtems/bsd/sys/resource.h
o rtems/bsd/sys/time.h
o rtems/bsd/sys/timespec.h
o rtems/bsd/sys/types.h
o rtems/bsd/sys/unistd.h

It is now possible to include <sys/socket.h> directly for example.

Generate one Makefile which builds everything including tests.

Property mode set to 100644

File size: 21.1 KB

Line
1	#include "port_before.h"
2
3	/*
4	* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
5	* Copyright (c) 1996-1999 by Internet Software Consortium.
6	*
7	* Permission to use, copy, modify, and distribute this software for any
8	* purpose with or without fee is hereby granted, provided that the above
9	* copyright notice and this permission notice appear in all copies.
10	*
11	* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
12	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
14	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
17	* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18	*/
19
20	#ifndef lint
21	static const char rcsid[] = "$Id: ns_print.c,v 1.6.18.4 2005/04/27 05:01:09 sra Exp $";
22	#endif
23	#include <sys/cdefs.h>
24	__FBSDID("$FreeBSD$");
25
26	/* Import. */
27
28	#include "port_before.h"
29
30	#include <rtems/bsd/sys/types.h>
31	#include <sys/socket.h>
32
33	#include <netinet/in.h>
34	#include <arpa/nameser.h>
35	#include <arpa/inet.h>
36
37	#ifdef _LIBC
38	#include <assert.h>
39	#define INSIST(cond) assert(cond)
40	#else
41	#include <isc/assertions.h>
42	#include <isc/dst.h>
43	#endif
44	#include <errno.h>
45	#include <resolv.h>
46	#include <string.h>
47	#include <ctype.h>
48
49	#include "port_after.h"
50
51	#ifdef SPRINTF_CHAR
52	# define SPRINTF(x) strlen(sprintf/**/x)
53	#else
54	# define SPRINTF(x) ((size_t)sprintf x)
55	#endif
56
57	/* Forward. */
58
59	static size_t prune_origin(const char name, const char origin);
60	static int charstr(const u_char rdata, const u_char edata,
61	char *buf, size_t buflen);
62	static int addname(const u_char *msg, size_t msglen,
63	const u_char *p, const char origin,
64	char *buf, size_t buflen);
65	static void addlen(size_t len, char *buf, size_t buflen);
66	static int addstr(const char *src, size_t len,
67	char *buf, size_t buflen);
68	static int addtab(size_t len, size_t target, int spaced,
69	char *buf, size_t buflen);
70
71	/* Macros. */
72
73	#define T(x) \
74	do { \
75	if ((x) < 0) \
76	return (-1); \
77	} while (0)
78
79	/* Public. */
80
81	/*%
82	* Convert an RR to presentation format.
83	*
84	* return:
85	*\li Number of characters written to buf, or -1 (check errno).
86	*/
87	int
88	ns_sprintrr(const ns_msg handle, const ns_rr rr,
89	const char name_ctx, const char origin,
90	char *buf, size_t buflen)
91	{
92	int n;
93
94	n = ns_sprintrrf(ns_msg_base(handle), ns_msg_size(handle),
95	ns_rr_name(rr), ns_rr_class(rr), ns_rr_type(*rr),
96	ns_rr_ttl(rr), ns_rr_rdata(rr), ns_rr_rdlen(*rr),
97	name_ctx, origin, buf, buflen);
98	return (n);
99	}
100
101	/*%
102	* Convert the fields of an RR into presentation format.
103	*
104	* return:
105	*\li Number of characters written to buf, or -1 (check errno).
106	*/
107	int
108	ns_sprintrrf(const u_char *msg, size_t msglen,
109	const char *name, ns_class class, ns_type type,
110	u_long ttl, const u_char *rdata, size_t rdlen,
111	const char name_ctx, const char origin,
112	char *buf, size_t buflen)
113	{
114	const char *obuf = buf;
115	const u_char *edata = rdata + rdlen;
116	int spaced = 0;
117
118	const char *comment;
119	char tmp[100];
120	int len, x;
121
122	/*
123	* Owner.
124	*/
125	if (name_ctx != NULL && ns_samename(name_ctx, name) == 1) {
126	T(addstr("\t\t\t", 3, &buf, &buflen));
127	} else {
128	len = prune_origin(name, origin);
129	if (*name == '\0') {
130	goto root;
131	} else if (len == 0) {
132	T(addstr("@\t\t\t", 4, &buf, &buflen));
133	} else {
134	T(addstr(name, len, &buf, &buflen));
135	/* Origin not used or not root, and no trailing dot? */
136	if (((origin == NULL \|\| origin[0] == '\0') \|\|
137	(origin[0] != '.' && origin[1] != '\0' &&
138	name[len] == '\0')) && name[len - 1] != '.') {
139	root:
140	T(addstr(".", 1, &buf, &buflen));
141	len++;
142	}
143	T(spaced = addtab(len, 24, spaced, &buf, &buflen));
144	}
145	}
146
147	/*
148	* TTL, Class, Type.
149	*/
150	T(x = ns_format_ttl(ttl, buf, buflen));
151	addlen(x, &buf, &buflen);
152	len = SPRINTF((tmp, " %s %s", p_class(class), p_type(type)));
153	T(addstr(tmp, len, &buf, &buflen));
154	T(spaced = addtab(x + len, 16, spaced, &buf, &buflen));
155
156	/*
157	* RData.
158	*/
159	switch (type) {
160	case ns_t_a:
161	if (rdlen != (size_t)NS_INADDRSZ)
162	goto formerr;
163	(void) inet_ntop(AF_INET, rdata, buf, buflen);
164	addlen(strlen(buf), &buf, &buflen);
165	break;
166
167	case ns_t_cname:
168	case ns_t_mb:
169	case ns_t_mg:
170	case ns_t_mr:
171	case ns_t_ns:
172	case ns_t_ptr:
173	case ns_t_dname:
174	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
175	break;
176
177	case ns_t_hinfo:
178	case ns_t_isdn:
179	/* First word. */
180	T(len = charstr(rdata, edata, &buf, &buflen));
181	if (len == 0)
182	goto formerr;
183	rdata += len;
184	T(addstr(" ", 1, &buf, &buflen));
185
186
187	/* Second word, optional in ISDN records. */
188	if (type == ns_t_isdn && rdata == edata)
189	break;
190
191	T(len = charstr(rdata, edata, &buf, &buflen));
192	if (len == 0)
193	goto formerr;
194	rdata += len;
195	break;
196
197	case ns_t_soa: {
198	u_long t;
199
200	/* Server name. */
201	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
202	T(addstr(" ", 1, &buf, &buflen));
203
204	/* Administrator name. */
205	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
206	T(addstr(" (\n", 3, &buf, &buflen));
207	spaced = 0;
208
209	if ((edata - rdata) != 5*NS_INT32SZ)
210	goto formerr;
211
212	/* Serial number. */
213	t = ns_get32(rdata); rdata += NS_INT32SZ;
214	T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
215	len = SPRINTF((tmp, "%lu", t));
216	T(addstr(tmp, len, &buf, &buflen));
217	T(spaced = addtab(len, 16, spaced, &buf, &buflen));
218	T(addstr("; serial\n", 9, &buf, &buflen));
219	spaced = 0;
220
221	/* Refresh interval. */
222	t = ns_get32(rdata); rdata += NS_INT32SZ;
223	T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
224	T(len = ns_format_ttl(t, buf, buflen));
225	addlen(len, &buf, &buflen);
226	T(spaced = addtab(len, 16, spaced, &buf, &buflen));
227	T(addstr("; refresh\n", 10, &buf, &buflen));
228	spaced = 0;
229
230	/* Retry interval. */
231	t = ns_get32(rdata); rdata += NS_INT32SZ;
232	T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
233	T(len = ns_format_ttl(t, buf, buflen));
234	addlen(len, &buf, &buflen);
235	T(spaced = addtab(len, 16, spaced, &buf, &buflen));
236	T(addstr("; retry\n", 8, &buf, &buflen));
237	spaced = 0;
238
239	/* Expiry. */
240	t = ns_get32(rdata); rdata += NS_INT32SZ;
241	T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
242	T(len = ns_format_ttl(t, buf, buflen));
243	addlen(len, &buf, &buflen);
244	T(spaced = addtab(len, 16, spaced, &buf, &buflen));
245	T(addstr("; expiry\n", 9, &buf, &buflen));
246	spaced = 0;
247
248	/* Minimum TTL. */
249	t = ns_get32(rdata); rdata += NS_INT32SZ;
250	T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
251	T(len = ns_format_ttl(t, buf, buflen));
252	addlen(len, &buf, &buflen);
253	T(addstr(" )", 2, &buf, &buflen));
254	T(spaced = addtab(len, 16, spaced, &buf, &buflen));
255	T(addstr("; minimum\n", 10, &buf, &buflen));
256
257	break;
258	}
259
260	case ns_t_mx:
261	case ns_t_afsdb:
262	case ns_t_rt: {
263	u_int t;
264
265	if (rdlen < (size_t)NS_INT16SZ)
266	goto formerr;
267
268	/* Priority. */
269	t = ns_get16(rdata);
270	rdata += NS_INT16SZ;
271	len = SPRINTF((tmp, "%u ", t));
272	T(addstr(tmp, len, &buf, &buflen));
273
274	/* Target. */
275	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
276
277	break;
278	}
279
280	case ns_t_px: {
281	u_int t;
282
283	if (rdlen < (size_t)NS_INT16SZ)
284	goto formerr;
285
286	/* Priority. */
287	t = ns_get16(rdata);
288	rdata += NS_INT16SZ;
289	len = SPRINTF((tmp, "%u ", t));
290	T(addstr(tmp, len, &buf, &buflen));
291
292	/* Name1. */
293	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
294	T(addstr(" ", 1, &buf, &buflen));
295
296	/* Name2. */
297	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
298
299	break;
300	}
301
302	case ns_t_x25:
303	T(len = charstr(rdata, edata, &buf, &buflen));
304	if (len == 0)
305	goto formerr;
306	rdata += len;
307	break;
308
309	case ns_t_txt:
310	while (rdata < edata) {
311	T(len = charstr(rdata, edata, &buf, &buflen));
312	if (len == 0)
313	goto formerr;
314	rdata += len;
315	if (rdata < edata)
316	T(addstr(" ", 1, &buf, &buflen));
317	}
318	break;
319
320	case ns_t_nsap: {
321	char t[2+255*3];
322
323	(void) inet_nsap_ntoa(rdlen, rdata, t);
324	T(addstr(t, strlen(t), &buf, &buflen));
325	break;
326	}
327
328	case ns_t_aaaa:
329	if (rdlen != (size_t)NS_IN6ADDRSZ)
330	goto formerr;
331	(void) inet_ntop(AF_INET6, rdata, buf, buflen);
332	addlen(strlen(buf), &buf, &buflen);
333	break;
334
335	case ns_t_loc: {
336	char t[255];
337
338	/* XXX protocol format checking? */
339	(void) loc_ntoa(rdata, t);
340	T(addstr(t, strlen(t), &buf, &buflen));
341	break;
342	}
343
344	case ns_t_naptr: {
345	u_int order, preference;
346	char t[50];
347
348	if (rdlen < 2U*NS_INT16SZ)
349	goto formerr;
350
351	/* Order, Precedence. */
352	order = ns_get16(rdata); rdata += NS_INT16SZ;
353	preference = ns_get16(rdata); rdata += NS_INT16SZ;
354	len = SPRINTF((t, "%u %u ", order, preference));
355	T(addstr(t, len, &buf, &buflen));
356
357	/* Flags. */
358	T(len = charstr(rdata, edata, &buf, &buflen));
359	if (len == 0)
360	goto formerr;
361	rdata += len;
362	T(addstr(" ", 1, &buf, &buflen));
363
364	/* Service. */
365	T(len = charstr(rdata, edata, &buf, &buflen));
366	if (len == 0)
367	goto formerr;
368	rdata += len;
369	T(addstr(" ", 1, &buf, &buflen));
370
371	/* Regexp. */
372	T(len = charstr(rdata, edata, &buf, &buflen));
373	if (len < 0)
374	return (-1);
375	if (len == 0)
376	goto formerr;
377	rdata += len;
378	T(addstr(" ", 1, &buf, &buflen));
379
380	/* Server. */
381	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
382	break;
383	}
384
385	case ns_t_srv: {
386	u_int priority, weight, port;
387	char t[50];
388
389	if (rdlen < 3U*NS_INT16SZ)
390	goto formerr;
391
392	/* Priority, Weight, Port. */
393	priority = ns_get16(rdata); rdata += NS_INT16SZ;
394	weight = ns_get16(rdata); rdata += NS_INT16SZ;
395	port = ns_get16(rdata); rdata += NS_INT16SZ;
396	len = SPRINTF((t, "%u %u %u ", priority, weight, port));
397	T(addstr(t, len, &buf, &buflen));
398
399	/* Server. */
400	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
401	break;
402	}
403
404	case ns_t_minfo:
405	case ns_t_rp:
406	/* Name1. */
407	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
408	T(addstr(" ", 1, &buf, &buflen));
409
410	/* Name2. */
411	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
412
413	break;
414
415	case ns_t_wks: {
416	int n, lcnt;
417
418	if (rdlen < 1U + NS_INT32SZ)
419	goto formerr;
420
421	/* Address. */
422	(void) inet_ntop(AF_INET, rdata, buf, buflen);
423	addlen(strlen(buf), &buf, &buflen);
424	rdata += NS_INADDRSZ;
425
426	/* Protocol. */
427	len = SPRINTF((tmp, " %u ( ", *rdata));
428	T(addstr(tmp, len, &buf, &buflen));
429	rdata += NS_INT8SZ;
430
431	/* Bit map. */
432	n = 0;
433	lcnt = 0;
434	while (rdata < edata) {
435	u_int c = *rdata++;
436	do {
437	if (c & 0200) {
438	if (lcnt == 0) {
439	T(addstr("\n\t\t\t\t", 5,
440	&buf, &buflen));
441	lcnt = 10;
442	spaced = 0;
443	}
444	len = SPRINTF((tmp, "%d ", n));
445	T(addstr(tmp, len, &buf, &buflen));
446	lcnt--;
447	}
448	c <<= 1;
449	} while (++n & 07);
450	}
451	T(addstr(")", 1, &buf, &buflen));
452
453	break;
454	}
455
456	case ns_t_key: {
457	char base64_key[NS_MD5RSA_MAX_BASE64];
458	u_int keyflags, protocol, algorithm, key_id;
459	const char *leader;
460	int n;
461
462	if (rdlen < 0U + NS_INT16SZ + NS_INT8SZ + NS_INT8SZ)
463	goto formerr;
464
465	/* Key flags, Protocol, Algorithm. */
466	#ifndef _LIBC
467	key_id = dst_s_dns_key_id(rdata, edata-rdata);
468	#else
469	key_id = 0;
470	#endif
471	keyflags = ns_get16(rdata); rdata += NS_INT16SZ;
472	protocol = *rdata++;
473	algorithm = *rdata++;
474	len = SPRINTF((tmp, "0x%04x %u %u",
475	keyflags, protocol, algorithm));
476	T(addstr(tmp, len, &buf, &buflen));
477
478	/* Public key data. */
479	len = b64_ntop(rdata, edata - rdata,
480	base64_key, sizeof base64_key);
481	if (len < 0)
482	goto formerr;
483	if (len > 15) {
484	T(addstr(" (", 2, &buf, &buflen));
485	leader = "\n\t\t";
486	spaced = 0;
487	} else
488	leader = " ";
489	for (n = 0; n < len; n += 48) {
490	T(addstr(leader, strlen(leader), &buf, &buflen));
491	T(addstr(base64_key + n, MIN(len - n, 48),
492	&buf, &buflen));
493	}
494	if (len > 15)
495	T(addstr(" )", 2, &buf, &buflen));
496	n = SPRINTF((tmp, " ; key_tag= %u", key_id));
497	T(addstr(tmp, n, &buf, &buflen));
498
499	break;
500	}
501
502	case ns_t_sig: {
503	char base64_key[NS_MD5RSA_MAX_BASE64];
504	u_int type, algorithm, labels, footprint;
505	const char *leader;
506	u_long t;
507	int n;
508
509	if (rdlen < 22U)
510	goto formerr;
511
512	/* Type covered, Algorithm, Label count, Original TTL. */
513	type = ns_get16(rdata); rdata += NS_INT16SZ;
514	algorithm = *rdata++;
515	labels = *rdata++;
516	t = ns_get32(rdata); rdata += NS_INT32SZ;
517	len = SPRINTF((tmp, "%s %d %d %lu ",
518	p_type(type), algorithm, labels, t));
519	T(addstr(tmp, len, &buf, &buflen));
520	if (labels > (u_int)dn_count_labels(name))
521	goto formerr;
522
523	/* Signature expiry. */
524	t = ns_get32(rdata); rdata += NS_INT32SZ;
525	len = SPRINTF((tmp, "%s ", p_secstodate(t)));
526	T(addstr(tmp, len, &buf, &buflen));
527
528	/* Time signed. */
529	t = ns_get32(rdata); rdata += NS_INT32SZ;
530	len = SPRINTF((tmp, "%s ", p_secstodate(t)));
531	T(addstr(tmp, len, &buf, &buflen));
532
533	/* Signature Footprint. */
534	footprint = ns_get16(rdata); rdata += NS_INT16SZ;
535	len = SPRINTF((tmp, "%u ", footprint));
536	T(addstr(tmp, len, &buf, &buflen));
537
538	/* Signer's name. */
539	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
540
541	/* Signature. */
542	len = b64_ntop(rdata, edata - rdata,
543	base64_key, sizeof base64_key);
544	if (len > 15) {
545	T(addstr(" (", 2, &buf, &buflen));
546	leader = "\n\t\t";
547	spaced = 0;
548	} else
549	leader = " ";
550	if (len < 0)
551	goto formerr;
552	for (n = 0; n < len; n += 48) {
553	T(addstr(leader, strlen(leader), &buf, &buflen));
554	T(addstr(base64_key + n, MIN(len - n, 48),
555	&buf, &buflen));
556	}
557	if (len > 15)
558	T(addstr(" )", 2, &buf, &buflen));
559	break;
560	}
561
562	case ns_t_nxt: {
563	int n, c;
564
565	/* Next domain name. */
566	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
567
568	/* Type bit map. */
569	n = edata - rdata;
570	for (c = 0; c < n*8; c++)
571	if (NS_NXT_BIT_ISSET(c, rdata)) {
572	len = SPRINTF((tmp, " %s", p_type(c)));
573	T(addstr(tmp, len, &buf, &buflen));
574	}
575	break;
576	}
577
578	case ns_t_cert: {
579	u_int c_type, key_tag, alg;
580	int n;
581	unsigned int siz;
582	char base64_cert[8192], tmp[40];
583	const char *leader;
584
585	c_type = ns_get16(rdata); rdata += NS_INT16SZ;
586	key_tag = ns_get16(rdata); rdata += NS_INT16SZ;
587	alg = (u_int) *rdata++;
588
589	len = SPRINTF((tmp, "%d %d %d ", c_type, key_tag, alg));
590	T(addstr(tmp, len, &buf, &buflen));
591	siz = (edata-rdata)4/3 + 4; / "+4" accounts for trailing \0 */
592	if (siz > sizeof(base64_cert) * 3/4) {
593	const char *str = "record too long to print";
594	T(addstr(str, strlen(str), &buf, &buflen));
595	}
596	else {
597	len = b64_ntop(rdata, edata-rdata, base64_cert, siz);
598
599	if (len < 0)
600	goto formerr;
601	else if (len > 15) {
602	T(addstr(" (", 2, &buf, &buflen));
603	leader = "\n\t\t";
604	spaced = 0;
605	}
606	else
607	leader = " ";
608
609	for (n = 0; n < len; n += 48) {
610	T(addstr(leader, strlen(leader),
611	&buf, &buflen));
612	T(addstr(base64_cert + n, MIN(len - n, 48),
613	&buf, &buflen));
614	}
615	if (len > 15)
616	T(addstr(" )", 2, &buf, &buflen));
617	}
618	break;
619	}
620
621	case ns_t_tkey: {
622	/* KJD - need to complete this */
623	u_long t;
624	int mode, err, keysize;
625
626	/* Algorithm name. */
627	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
628	T(addstr(" ", 1, &buf, &buflen));
629
630	/* Inception. */
631	t = ns_get32(rdata); rdata += NS_INT32SZ;
632	len = SPRINTF((tmp, "%s ", p_secstodate(t)));
633	T(addstr(tmp, len, &buf, &buflen));
634
635	/* Experation. */
636	t = ns_get32(rdata); rdata += NS_INT32SZ;
637	len = SPRINTF((tmp, "%s ", p_secstodate(t)));
638	T(addstr(tmp, len, &buf, &buflen));
639
640	/* Mode , Error, Key Size. */
641	/* Priority, Weight, Port. */
642	mode = ns_get16(rdata); rdata += NS_INT16SZ;
643	err = ns_get16(rdata); rdata += NS_INT16SZ;
644	keysize = ns_get16(rdata); rdata += NS_INT16SZ;
645	len = SPRINTF((tmp, "%u %u %u ", mode, err, keysize));
646	T(addstr(tmp, len, &buf, &buflen));
647
648	/* XXX need to dump key, print otherdata length & other data */
649	break;
650	}
651
652	case ns_t_tsig: {
653	/* BEW - need to complete this */
654	int n;
655
656	T(len = addname(msg, msglen, &rdata, origin, &buf, &buflen));
657	T(addstr(" ", 1, &buf, &buflen));
658	rdata += 8; /%< time /
659	n = ns_get16(rdata); rdata += INT16SZ;
660	rdata += n; /%< sig /
661	n = ns_get16(rdata); rdata += INT16SZ; /%< original id /
662	sprintf(buf, "%d", ns_get16(rdata));
663	rdata += INT16SZ;
664	addlen(strlen(buf), &buf, &buflen);
665	break;
666	}
667
668	case ns_t_a6: {
669	struct in6_addr a;
670	int pbyte, pbit;
671
672	/* prefix length */
673	if (rdlen == 0U) goto formerr;
674	len = SPRINTF((tmp, "%d ", *rdata));
675	T(addstr(tmp, len, &buf, &buflen));
676	pbit = *rdata;
677	if (pbit > 128) goto formerr;
678	pbyte = (pbit & ~7) / 8;
679	rdata++;
680
681	/* address suffix: provided only when prefix len != 128 */
682	if (pbit < 128) {
683	if (rdata + pbyte >= edata) goto formerr;
684	memset(&a, 0, sizeof(a));
685	memcpy(&a.s6_addr[pbyte], rdata, sizeof(a) - pbyte);
686	(void) inet_ntop(AF_INET6, &a, buf, buflen);
687	addlen(strlen(buf), &buf, &buflen);
688	rdata += sizeof(a) - pbyte;
689	}
690
691	/* prefix name: provided only when prefix len > 0 */
692	if (pbit == 0)
693	break;
694	if (rdata >= edata) goto formerr;
695	T(addstr(" ", 1, &buf, &buflen));
696	T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
697
698	break;
699	}
700
701	case ns_t_opt: {
702	len = SPRINTF((tmp, "%u bytes", class));
703	T(addstr(tmp, len, &buf, &buflen));
704	break;
705	}
706
707	default:
708	comment = "unknown RR type";
709	goto hexify;
710	}
711	return (buf - obuf);
712	formerr:
713	comment = "RR format error";
714	hexify: {
715	int n, m;
716	char *p;
717
718	len = SPRINTF((tmp, "\\# %u%s\t; %s", (unsigned)(edata - rdata),
719	rdlen != 0U ? " (" : "", comment));
720	T(addstr(tmp, len, &buf, &buflen));
721	while (rdata < edata) {
722	p = tmp;
723	p += SPRINTF((p, "\n\t"));
724	spaced = 0;
725	n = MIN(16, edata - rdata);
726	for (m = 0; m < n; m++)
727	p += SPRINTF((p, "%02x ", rdata[m]));
728	T(addstr(tmp, p - tmp, &buf, &buflen));
729	if (n < 16) {
730	T(addstr(")", 1, &buf, &buflen));
731	T(addtab(p - tmp + 1, 48, spaced, &buf, &buflen));
732	}
733	p = tmp;
734	p += SPRINTF((p, "; "));
735	for (m = 0; m < n; m++)
736	*p++ = (isascii(rdata[m]) && isprint(rdata[m]))
737	? rdata[m]
738	: '.';
739	T(addstr(tmp, p - tmp, &buf, &buflen));
740	rdata += n;
741	}
742	return (buf - obuf);
743	}
744	}
745
746	/* Private. */
747
748	/*%
749	* size_t
750	* prune_origin(name, origin)
751	* Find out if the name is at or under the current origin.
752	* return:
753	* Number of characters in name before start of origin,
754	* or length of name if origin does not match.
755	* notes:
756	* This function should share code with samedomain().
757	*/
758	static size_t
759	prune_origin(const char name, const char origin) {
760	const char *oname = name;
761
762	while (*name != '\0') {
763	if (origin != NULL && ns_samename(name, origin) == 1)
764	return (name - oname - (name > oname));
765	while (*name != '\0') {
766	if (*name == '\\') {
767	name++;
768	/* XXX need to handle \nnn form. */
769	if (*name == '\0')
770	break;
771	} else if (*name == '.') {
772	name++;
773	break;
774	}
775	name++;
776	}
777	}
778	return (name - oname);
779	}
780
781	/*%
782	* int
783	* charstr(rdata, edata, buf, buflen)
784	* Format a <character-string> into the presentation buffer.
785	* return:
786	* Number of rdata octets consumed
787	* 0 for protocol format error
788	* -1 for output buffer error
789	* side effects:
790	* buffer is advanced on success.
791	*/
792	static int
793	charstr(const u_char rdata, const u_char edata, char *buf, size_t buflen) {
794	const u_char *odata = rdata;
795	size_t save_buflen = *buflen;
796	char save_buf = buf;
797
798	if (addstr("\"", 1, buf, buflen) < 0)
799	goto enospc;
800	if (rdata < edata) {
801	int n = *rdata;
802
803	if (rdata + 1 + n <= edata) {
804	rdata++;
805	while (n-- > 0) {
806	if (strchr("\n\"\\", *rdata) != NULL)
807	if (addstr("\\", 1, buf, buflen) < 0)
808	goto enospc;
809	if (addstr((const char *)rdata, 1,
810	buf, buflen) < 0)
811	goto enospc;
812	rdata++;
813	}
814	}
815	}
816	if (addstr("\"", 1, buf, buflen) < 0)
817	goto enospc;
818	return (rdata - odata);
819	enospc:
820	errno = ENOSPC;
821	*buf = save_buf;
822	*buflen = save_buflen;
823	return (-1);
824	}
825
826	static int
827	addname(const u_char *msg, size_t msglen,
828	const u_char *pp, const char origin,
829	char *buf, size_t buflen)
830	{
831	size_t newlen, save_buflen = *buflen;
832	char save_buf = buf;
833	int n;
834
835	n = dn_expand(msg, msg + msglen, pp, buf, *buflen);
836	if (n < 0)
837	goto enospc; /%< Guess. /
838	newlen = prune_origin(*buf, origin);
839	if (**buf == '\0') {
840	goto root;
841	} else if (newlen == 0U) {
842	/* Use "@" instead of name. */
843	if (newlen + 2 > *buflen)
844	goto enospc; /* No room for "@\0". */
845	(*buf)[newlen++] = '@';
846	(*buf)[newlen] = '\0';
847	} else {
848	if (((origin == NULL \|\| origin[0] == '\0') \|\|
849	(origin[0] != '.' && origin[1] != '\0' &&
850	(buf)[newlen] == '\0')) && (buf)[newlen - 1] != '.') {
851	/* No trailing dot. */
852	root:
853	if (newlen + 2 > *buflen)
854	goto enospc; /* No room for ".\0". */
855	(*buf)[newlen++] = '.';
856	(*buf)[newlen] = '\0';
857	}
858	}
859	*pp += n;
860	addlen(newlen, buf, buflen);
861	**buf = '\0';
862	return (newlen);
863	enospc:
864	errno = ENOSPC;
865	*buf = save_buf;
866	*buflen = save_buflen;
867	return (-1);
868	}
869
870	static void
871	addlen(size_t len, char *buf, size_t buflen) {
872	INSIST(len <= *buflen);
873	*buf += len;
874	*buflen -= len;
875	}
876
877	static int
878	addstr(const char src, size_t len, char buf, size_t buflen) {
879	if (len >= *buflen) {
880	errno = ENOSPC;
881	return (-1);
882	}
883	memcpy(*buf, src, len);
884	addlen(len, buf, buflen);
885	**buf = '\0';
886	return (0);
887	}
888
889	static int
890	addtab(size_t len, size_t target, int spaced, char *buf, size_t buflen) {
891	size_t save_buflen = *buflen;
892	char save_buf = buf;
893	int t;
894
895	if (spaced \|\| len >= target - 1) {
896	T(addstr(" ", 2, buf, buflen));
897	spaced = 1;
898	} else {
899	for (t = (target - len - 1) / 8; t >= 0; t--)
900	if (addstr("\t", 1, buf, buflen) < 0) {
901	*buflen = save_buflen;
902	*buf = save_buf;
903	return (-1);
904	}
905	spaced = 0;
906	}
907	return (spaced);
908	}
909
910	/! \file /

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source: rtems-libbsd/freebsd/lib/libc/nameser/ns_print.c @ e599318

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