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[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [net/] [ns_print.c] - Blame information for rev 829

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Line No. Rev Author Line
1 207 jeremybenn 
/*
2 
 * Copyright (c) 1996-1999 by Internet Software Consortium.
3 
 *
4 
 * Permission to use, copy, modify, and distribute this software for any
5 
 * purpose with or without fee is hereby granted, provided that the above
6 
 * copyright notice and this permission notice appear in all copies.
7 
 *
8 
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
9 
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
10 
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
11 
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
12 
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
13 
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
14 
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
15 
 * SOFTWARE.
16 
 */
17 
 
18 
#if !defined(_LIBC) && !defined(lint)
19 
static const char rcsid[] = "$BINDId: ns_print.c,v 8.18 2000/02/29 05:48:12 vixie Exp $";
20 
#endif
21 
 
22 
/* Import. */
23 
 
24 
#include <sys/types.h>
25 
#include <sys/socket.h>
26 
 
27 
#include <netinet/in.h>
28 
#include <arpa/nameser.h>
29 
#include <arpa/inet.h>
30 
 
31 
#include <assert.h>
32 
#include <errno.h>
33 
#include <resolv.h>
34 
#include <string.h>
35 
#include <ctype.h>
36 
 
37 
#include "libc-symbols.h"
38 
 
39 
#ifdef SPRINTF_CHAR
40 
# define SPRINTF(x) strlen(sprintf/**/x)
41 
#else
42 
# define SPRINTF(x) ((size_t)sprintf x)
43 
#endif
44 
 
45 
/* Forward. */
46 
 
47 
static size_t   prune_origin(const char *name, const char *origin);
48 
static int      charstr(const u_char *rdata, const u_char *edata,
49 
                        char **buf, size_t *buflen);
50 
static int      addname(const u_char *msg, size_t msglen,
51 
                        const u_char **p, const char *origin,
52 
                        char **buf, size_t *buflen);
53 
static void     addlen(size_t len, char **buf, size_t *buflen);
54 
static int      addstr(const char *src, size_t len,
55 
                       char **buf, size_t *buflen);
56 
static int      addtab(size_t len, size_t target, int spaced,
57 
                       char **buf, size_t *buflen);
58 
 
59 
/* Proto. */
60 
 
61 
#ifndef _LIBC
62 
u_int16_t       dst_s_dns_key_id(const u_char *, const int);
63 
#endif
64 
 
65 
/* Macros. */
66 
 
67 
#define T(x) \
68 
        do { \
69 
                if ((x) < 0) \
70 
                        return (-1); \
71 
        } while (0)
72 
 
73 
/* Public. */
74 
 
75 
/*
76 
 * int
77 
 * ns_sprintrr(handle, rr, name_ctx, origin, buf, buflen)
78 
 *      Convert an RR to presentation format.
79 
 * return:
80 
 *      Number of characters written to buf, or -1 (check errno).
81 
 */
82 
int
83 
ns_sprintrr(const ns_msg *handle, const ns_rr *rr,
84 
            const char *name_ctx, const char *origin,
85 
            char *buf, size_t buflen)
86 
{
87 
        int n;
88 
 
89 
        n = ns_sprintrrf(ns_msg_base(*handle), ns_msg_size(*handle),
90 
                         ns_rr_name(*rr), ns_rr_class(*rr), ns_rr_type(*rr),
91 
                         ns_rr_ttl(*rr), ns_rr_rdata(*rr), ns_rr_rdlen(*rr),
92 
                         name_ctx, origin, buf, buflen);
93 
        return (n);
94 
}
95 
 
96 
/*
97 
 * int
98 
 * ns_sprintrrf(msg, msglen, name, class, type, ttl, rdata, rdlen,
99 
 *             name_ctx, origin, buf, buflen)
100 
 *      Convert the fields of an RR into presentation format.
101 
 * return:
102 
 *      Number of characters written to buf, or -1 (check errno).
103 
 */
104 
int
105 
ns_sprintrrf(const u_char *msg, size_t msglen,
106 
            const char *name, ns_class class, ns_type type,
107 
            u_long ttl, const u_char *rdata, size_t rdlen,
108 
            const char *name_ctx, const char *origin,
109 
            char *buf, size_t buflen)
110 
{
111 
        const char *obuf = buf;
112 
        const u_char *edata = rdata + rdlen;
113 
        int spaced = 0;
114 
 
115 
        const char *comment;
116 
        char tmp[100];
117 
        int len, x;
118 
 
119 
        /*
120 
         * Owner.
121 
         */
122 
        if (name_ctx != NULL && ns_samename(name_ctx, name) == 1) {
123 
                T(addstr("\t\t\t", 3, &buf, &buflen));
124 
        } else {
125 
                len = prune_origin(name, origin);
126 
                if (len == 0) {
127 
                        T(addstr("@\t\t\t", 4, &buf, &buflen));
128 
                } else {
129 
                        T(addstr(name, len, &buf, &buflen));
130 
                        /* Origin not used or not root, and no trailing dot? */
131 
                        if (((origin == NULL || origin[0] == '\0') ||
132 
                            (origin[0] != '.' && origin[1] != '\0' &&
133 
                            name[len] == '\0')) && name[len - 1] != '.') {
134 
                                T(addstr(".", 1, &buf, &buflen));
135 
                                len++;
136 
                        }
137 
                        T(spaced = addtab(len, 24, spaced, &buf, &buflen));
138 
                }
139 
        }
140 
 
141 
        /*
142 
         * TTL, Class, Type.
143 
         */
144 
        T(x = ns_format_ttl(ttl, buf, buflen));
145 
        addlen(x, &buf, &buflen);
146 
        len = SPRINTF((tmp, " %s %s", p_class(class), p_type(type)));
147 
        T(addstr(tmp, len, &buf, &buflen));
148 
        T(spaced = addtab(x + len, 16, spaced, &buf, &buflen));
149 
 
150 
        /*
151 
         * RData.
152 
         */
153 
        switch (type) {
154 
        case ns_t_a:
155 
                if (rdlen != NS_INADDRSZ)
156 
                        goto formerr;
157 
                (void) inet_ntop(AF_INET, rdata, buf, buflen);
158 
                addlen(strlen(buf), &buf, &buflen);
159 
                break;
160 
 
161 
        case ns_t_cname:
162 
        case ns_t_mb:
163 
        case ns_t_mg:
164 
        case ns_t_mr:
165 
        case ns_t_ns:
166 
        case ns_t_ptr:
167 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
168 
                break;
169 
 
170 
        case ns_t_hinfo:
171 
        case ns_t_isdn:
172 
                /* First word. */
173 
                T(len = charstr(rdata, edata, &buf, &buflen));
174 
                if (len == 0)
175 
                        goto formerr;
176 
                rdata += len;
177 
                T(addstr(" ", 1, &buf, &buflen));
178 
 
179 
 
180 
                /* Second word, optional in ISDN records. */
181 
                if (type == ns_t_isdn && rdata == edata)
182 
                        break;
183 
 
184 
                T(len = charstr(rdata, edata, &buf, &buflen));
185 
                if (len == 0)
186 
                        goto formerr;
187 
                rdata += len;
188 
                break;
189 
 
190 
        case ns_t_soa: {
191 
                u_long t;
192 
 
193 
                /* Server name. */
194 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
195 
                T(addstr(" ", 1, &buf, &buflen));
196 
 
197 
                /* Administrator name. */
198 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
199 
                T(addstr(" (\n", 3, &buf, &buflen));
200 
                spaced = 0;
201 
 
202 
                if ((edata - rdata) != 5*NS_INT32SZ)
203 
                        goto formerr;
204 
 
205 
                /* Serial number. */
206 
                t = ns_get32(rdata);  rdata += NS_INT32SZ;
207 
                T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
208 
                len = SPRINTF((tmp, "%lu", t));
209 
                T(addstr(tmp, len, &buf, &buflen));
210 
                T(spaced = addtab(len, 16, spaced, &buf, &buflen));
211 
                T(addstr("; serial\n", 9, &buf, &buflen));
212 
                spaced = 0;
213 
 
214 
                /* Refresh interval. */
215 
                t = ns_get32(rdata);  rdata += NS_INT32SZ;
216 
                T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
217 
                T(len = ns_format_ttl(t, buf, buflen));
218 
                addlen(len, &buf, &buflen);
219 
                T(spaced = addtab(len, 16, spaced, &buf, &buflen));
220 
                T(addstr("; refresh\n", 10, &buf, &buflen));
221 
                spaced = 0;
222 
 
223 
                /* Retry interval. */
224 
                t = ns_get32(rdata);  rdata += NS_INT32SZ;
225 
                T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
226 
                T(len = ns_format_ttl(t, buf, buflen));
227 
                addlen(len, &buf, &buflen);
228 
                T(spaced = addtab(len, 16, spaced, &buf, &buflen));
229 
                T(addstr("; retry\n", 8, &buf, &buflen));
230 
                spaced = 0;
231 
 
232 
                /* Expiry. */
233 
                t = ns_get32(rdata);  rdata += NS_INT32SZ;
234 
                T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
235 
                T(len = ns_format_ttl(t, buf, buflen));
236 
                addlen(len, &buf, &buflen);
237 
                T(spaced = addtab(len, 16, spaced, &buf, &buflen));
238 
                T(addstr("; expiry\n", 9, &buf, &buflen));
239 
                spaced = 0;
240 
 
241 
                /* Minimum TTL. */
242 
                t = ns_get32(rdata);  rdata += NS_INT32SZ;
243 
                T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
244 
                T(len = ns_format_ttl(t, buf, buflen));
245 
                addlen(len, &buf, &buflen);
246 
                T(addstr(" )", 2, &buf, &buflen));
247 
                T(spaced = addtab(len, 16, spaced, &buf, &buflen));
248 
                T(addstr("; minimum\n", 10, &buf, &buflen));
249 
 
250 
                break;
251 
            }
252 
 
253 
        case ns_t_mx:
254 
        case ns_t_afsdb:
255 
        case ns_t_rt: {
256 
                u_int t;
257 
 
258 
                if (rdlen < NS_INT16SZ)
259 
                        goto formerr;
260 
 
261 
                /* Priority. */
262 
                t = ns_get16(rdata);
263 
                rdata += NS_INT16SZ;
264 
                len = SPRINTF((tmp, "%u ", t));
265 
                T(addstr(tmp, len, &buf, &buflen));
266 
 
267 
                /* Target. */
268 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
269 
 
270 
                break;
271 
            }
272 
 
273 
        case ns_t_px: {
274 
                u_int t;
275 
 
276 
                if (rdlen < NS_INT16SZ)
277 
                        goto formerr;
278 
 
279 
                /* Priority. */
280 
                t = ns_get16(rdata);
281 
                rdata += NS_INT16SZ;
282 
                len = SPRINTF((tmp, "%u ", t));
283 
                T(addstr(tmp, len, &buf, &buflen));
284 
 
285 
                /* Name1. */
286 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
287 
                T(addstr(" ", 1, &buf, &buflen));
288 
 
289 
                /* Name2. */
290 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
291 
 
292 
                break;
293 
            }
294 
 
295 
        case ns_t_x25:
296 
                T(len = charstr(rdata, edata, &buf, &buflen));
297 
                if (len == 0)
298 
                        goto formerr;
299 
                rdata += len;
300 
                break;
301 
 
302 
        case ns_t_txt:
303 
                while (rdata < edata) {
304 
                        T(len = charstr(rdata, edata, &buf, &buflen));
305 
                        if (len == 0)
306 
                                goto formerr;
307 
                        rdata += len;
308 
                        if (rdata < edata)
309 
                                T(addstr(" ", 1, &buf, &buflen));
310 
                }
311 
                break;
312 
 
313 
        case ns_t_nsap: {
314 
                /* 2*255 for hex digits, 128 for '.' and '\0', 2 for
315 
                   0x if inet_nsap_ntoa starts using it.  */
316 
                char t[255*2 + 128 + 2];
317 
 
318 
                (void) inet_nsap_ntoa(rdlen, rdata, t);
319 
                T(addstr(t, strlen(t), &buf, &buflen));
320 
                break;
321 
            }
322 
 
323 
        case ns_t_aaaa:
324 
                if (rdlen != NS_IN6ADDRSZ)
325 
                        goto formerr;
326 
                (void) inet_ntop(AF_INET6, rdata, buf, buflen);
327 
                addlen(strlen(buf), &buf, &buflen);
328 
                break;
329 
 
330 
        case ns_t_loc: {
331 
                char t[255];
332 
 
333 
                /* XXX protocol format checking? */
334 
                (void) loc_ntoa(rdata, t);
335 
                T(addstr(t, strlen(t), &buf, &buflen));
336 
                break;
337 
            }
338 
 
339 
        case ns_t_naptr: {
340 
                u_int order, preference;
341 
                char t[50];
342 
 
343 
                if (rdlen < 2*NS_INT16SZ)
344 
                        goto formerr;
345 
 
346 
                /* Order, Precedence. */
347 
                order = ns_get16(rdata);        rdata += NS_INT16SZ;
348 
                preference = ns_get16(rdata);   rdata += NS_INT16SZ;
349 
                len = SPRINTF((t, "%u %u ", order, preference));
350 
                T(addstr(t, len, &buf, &buflen));
351 
 
352 
                /* Flags. */
353 
                T(len = charstr(rdata, edata, &buf, &buflen));
354 
                if (len == 0)
355 
                        goto formerr;
356 
                rdata += len;
357 
                T(addstr(" ", 1, &buf, &buflen));
358 
 
359 
                /* Service. */
360 
                T(len = charstr(rdata, edata, &buf, &buflen));
361 
                if (len == 0)
362 
                        goto formerr;
363 
                rdata += len;
364 
                T(addstr(" ", 1, &buf, &buflen));
365 
 
366 
                /* Regexp. */
367 
                T(len = charstr(rdata, edata, &buf, &buflen));
368 
                if (len < 0)
369 
                        return (-1);
370 
                if (len == 0)
371 
                        goto formerr;
372 
                rdata += len;
373 
                T(addstr(" ", 1, &buf, &buflen));
374 
 
375 
                /* Server. */
376 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
377 
                break;
378 
            }
379 
 
380 
        case ns_t_srv: {
381 
                u_int priority, weight, port;
382 
                char t[50];
383 
 
384 
                if (rdlen < NS_INT16SZ*3)
385 
                        goto formerr;
386 
 
387 
                /* Priority, Weight, Port. */
388 
                priority = ns_get16(rdata);  rdata += NS_INT16SZ;
389 
                weight   = ns_get16(rdata);  rdata += NS_INT16SZ;
390 
                port     = ns_get16(rdata);  rdata += NS_INT16SZ;
391 
                len = SPRINTF((t, "%u %u %u ", priority, weight, port));
392 
                T(addstr(t, len, &buf, &buflen));
393 
 
394 
                /* Server. */
395 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
396 
                break;
397 
            }
398 
 
399 
        case ns_t_minfo:
400 
        case ns_t_rp:
401 
                /* Name1. */
402 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
403 
                T(addstr(" ", 1, &buf, &buflen));
404 
 
405 
                /* Name2. */
406 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
407 
 
408 
                break;
409 
 
410 
        case ns_t_wks: {
411 
                int n, lcnt;
412 
 
413 
                if (rdlen < NS_INT32SZ + 1)
414 
                        goto formerr;
415 
 
416 
                /* Address. */
417 
                (void) inet_ntop(AF_INET, rdata, buf, buflen);
418 
                addlen(strlen(buf), &buf, &buflen);
419 
                rdata += NS_INADDRSZ;
420 
 
421 
                /* Protocol. */
422 
                len = SPRINTF((tmp, " %u ( ", *rdata));
423 
                T(addstr(tmp, len, &buf, &buflen));
424 
                rdata += NS_INT8SZ;
425 
 
426 
                /* Bit map. */
427 
                n = 0;
428 
                lcnt = 0;
429 
                while (rdata < edata) {
430 
                        u_int c = *rdata++;
431 
                        do {
432 
                                if (c & 0200) {
433 
                                        if (lcnt == 0) {
434 
                                                T(addstr("\n\t\t\t\t", 5,
435 
                                                         &buf, &buflen));
436 
                                                lcnt = 10;
437 
                                                spaced = 0;
438 
                                        }
439 
                                        len = SPRINTF((tmp, "%d ", n));
440 
                                        T(addstr(tmp, len, &buf, &buflen));
441 
                                        lcnt--;
442 
                                }
443 
                                c <<= 1;
444 
                        } while (++n & 07);
445 
                }
446 
                T(addstr(")", 1, &buf, &buflen));
447 
 
448 
                break;
449 
            }
450 
 
451 
        case ns_t_key: {
452 
#ifndef _LIBC
453 
                char base64_key[NS_MD5RSA_MAX_BASE64];
454 
                u_int keyflags, protocol, algorithm, key_id;
455 
                const char *leader;
456 
                int n;
457 
 
458 
                if (rdlen < NS_INT16SZ + NS_INT8SZ + NS_INT8SZ)
459 
                        goto formerr;
460 
 
461 
                /* Key flags, Protocol, Algorithm. */
462 
                key_id = dst_s_dns_key_id(rdata, edata-rdata);
463 
                keyflags = ns_get16(rdata);  rdata += NS_INT16SZ;
464 
                protocol = *rdata++;
465 
                algorithm = *rdata++;
466 
                len = SPRINTF((tmp, "0x%04x %u %u",
467 
                               keyflags, protocol, algorithm));
468 
                T(addstr(tmp, len, &buf, &buflen));
469 
 
470 
                /* Public key data. */
471 
                len = b64_ntop(rdata, edata - rdata,
472 
                               base64_key, sizeof base64_key);
473 
                if (len < 0)
474 
                        goto formerr;
475 
                if (len > 15) {
476 
                        T(addstr(" (", 2, &buf, &buflen));
477 
                        leader = "\n\t\t";
478 
                        spaced = 0;
479 
                } else
480 
                        leader = " ";
481 
                for (n = 0; n < len; n += 48) {
482 
                        T(addstr(leader, strlen(leader), &buf, &buflen));
483 
                        T(addstr(base64_key + n, MIN(len - n, 48),
484 
                                 &buf, &buflen));
485 
                }
486 
                if (len > 15)
487 
                        T(addstr(" )", 2, &buf, &buflen));
488 
                n = SPRINTF((tmp, " ; key_tag= %u", key_id));
489 
                T(addstr(tmp, n, &buf, &buflen));
490 
#endif /* !_LIBC */
491 
 
492 
                break;
493 
            }
494 
 
495 
        case ns_t_sig: {
496 
#ifndef _LIBC
497 
                char base64_key[NS_MD5RSA_MAX_BASE64];
498 
                u_int type, algorithm, labels, footprint;
499 
                const char *leader;
500 
                u_long t;
501 
                int n;
502 
 
503 
                if (rdlen < 22)
504 
                        goto formerr;
505 
 
506 
                /* Type covered, Algorithm, Label count, Original TTL. */
507 
                type = ns_get16(rdata);  rdata += NS_INT16SZ;
508 
                algorithm = *rdata++;
509 
                labels = *rdata++;
510 
                t = ns_get32(rdata);  rdata += NS_INT32SZ;
511 
                len = SPRINTF((tmp, "%s %d %d %lu ",
512 
                               p_type(type), algorithm, labels, t));
513 
                T(addstr(tmp, len, &buf, &buflen));
514 
                if (labels > (u_int)dn_count_labels(name))
515 
                        goto formerr;
516 
 
517 
                /* Signature expiry. */
518 
                t = ns_get32(rdata);  rdata += NS_INT32SZ;
519 
                len = SPRINTF((tmp, "%s ", p_secstodate(t)));
520 
                T(addstr(tmp, len, &buf, &buflen));
521 
 
522 
                /* Time signed. */
523 
                t = ns_get32(rdata);  rdata += NS_INT32SZ;
524 
                len = SPRINTF((tmp, "%s ", p_secstodate(t)));
525 
                T(addstr(tmp, len, &buf, &buflen));
526 
 
527 
                /* Signature Footprint. */
528 
                footprint = ns_get16(rdata);  rdata += NS_INT16SZ;
529 
                len = SPRINTF((tmp, "%u ", footprint));
530 
                T(addstr(tmp, len, &buf, &buflen));
531 
 
532 
                /* Signer's name. */
533 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
534 
 
535 
                /* Signature. */
536 
                len = b64_ntop(rdata, edata - rdata,
537 
                               base64_key, sizeof base64_key);
538 
                if (len > 15) {
539 
                        T(addstr(" (", 2, &buf, &buflen));
540 
                        leader = "\n\t\t";
541 
                        spaced = 0;
542 
                } else
543 
                        leader = " ";
544 
                if (len < 0)
545 
                        goto formerr;
546 
                for (n = 0; n < len; n += 48) {
547 
                        T(addstr(leader, strlen(leader), &buf, &buflen));
548 
                        T(addstr(base64_key + n, MIN(len - n, 48),
549 
                                 &buf, &buflen));
550 
                }
551 
                if (len > 15)
552 
                        T(addstr(" )", 2, &buf, &buflen));
553 
#endif /* !_LIBC */
554 
                break;
555 
            }
556 
 
557 
        case ns_t_nxt: {
558 
                int n, c;
559 
 
560 
                /* Next domain name. */
561 
                T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
562 
 
563 
                /* Type bit map. */
564 
                n = edata - rdata;
565 
                for (c = 0; c < n*8; c++)
566 
                        if (NS_NXT_BIT_ISSET(c, rdata)) {
567 
                                len = SPRINTF((tmp, " %s", p_type(c)));
568 
                                T(addstr(tmp, len, &buf, &buflen));
569 
                        }
570 
                break;
571 
            }
572 
 
573 
        case ns_t_cert: {
574 
                u_int c_type, key_tag, alg;
575 
                int n, siz;
576 
                char base64_cert[8192], *leader, tmp[40];
577 
 
578 
                c_type  = ns_get16(rdata); rdata += NS_INT16SZ;
579 
                key_tag = ns_get16(rdata); rdata += NS_INT16SZ;
580 
                alg = (u_int) *rdata++;
581 
 
582 
                len = SPRINTF((tmp, "%d %d %d ", c_type, key_tag, alg));
583 
                T(addstr(tmp, len, &buf, &buflen));
584 
                siz = (edata-rdata)*4/3 + 4; /* "+4" accounts for trailing \0 */
585 
                if (siz > sizeof(base64_cert) * 3/4) {
586 
                        char *str = "record too long to print";
587 
                        T(addstr(str, strlen(str), &buf, &buflen));
588 
                }
589 
                else {
590 
                        len = b64_ntop(rdata, edata-rdata, base64_cert, siz);
591 
 
592 
                        if (len < 0)
593 
                                goto formerr;
594 
                        else if (len > 15) {
595 
                                T(addstr(" (", 2, &buf, &buflen));
596 
                                leader = "\n\t\t";
597 
                                spaced = 0;
598 
                        }
599 
                        else
600 
                                leader = " ";
601 
 
602 
                        for (n = 0; n < len; n += 48) {
603 
                                T(addstr(leader, strlen(leader),
604 
                                         &buf, &buflen));
605 
                                T(addstr(base64_cert + n, MIN(len - n, 48),
606 
                                         &buf, &buflen));
607 
                        }
608 
                        if (len > 15)
609 
                                T(addstr(" )", 2, &buf, &buflen));
610 
                }
611 
                break;
612 
            }
613 
 
614 
        case ns_t_tsig: {
615 
                /* BEW - need to complete this */
616 
                int n;
617 
 
618 
                T(len = addname(msg, msglen, &rdata, origin, &buf, &buflen));
619 
                T(addstr(" ", 1, &buf, &buflen));
620 
                rdata += 8; /* time */
621 
                n = ns_get16(rdata); rdata += INT16SZ;
622 
                rdata += n; /* sig */
623 
                n = ns_get16(rdata); rdata += INT16SZ; /* original id */
624 
                sprintf(buf, "%d", ns_get16(rdata));
625 
                rdata += INT16SZ;
626 
                addlen(strlen(buf), &buf, &buflen);
627 
                break;
628 
            }
629 
 
630 
        default:
631 
                comment = "unknown RR type";
632 
                goto hexify;
633 
        }
634 
        return (buf - obuf);
635 
 formerr:
636 
        comment = "RR format error";
637 
 hexify: {
638 
        int n, m;
639 
        char *p;
640 
 
641 
        len = SPRINTF((tmp, "\\#(\t\t; %s", comment));
642 
        T(addstr(tmp, len, &buf, &buflen));
643 
        while (rdata < edata) {
644 
                p = tmp;
645 
                p += SPRINTF((p, "\n\t"));
646 
                spaced = 0;
647 
                n = MIN(16, edata - rdata);
648 
                for (m = 0; m < n; m++)
649 
                        p += SPRINTF((p, "%02x ", rdata[m]));
650 
                T(addstr(tmp, p - tmp, &buf, &buflen));
651 
                if (n < 16) {
652 
                        T(addstr(")", 1, &buf, &buflen));
653 
                        T(addtab(p - tmp + 1, 48, spaced, &buf, &buflen));
654 
                }
655 
                p = tmp;
656 
                p += SPRINTF((p, "; "));
657 
                for (m = 0; m < n; m++)
658 
                        *p++ = (isascii(rdata[m]) && isprint(rdata[m]))
659 
                                ? rdata[m]
660 
                                : '.';
661 
                T(addstr(tmp, p - tmp, &buf, &buflen));
662 
                rdata += n;
663 
        }
664 
        return (buf - obuf);
665 
    }
666 
}
667 
 
668 
/* Private. */
669 
 
670 
/*
671 
 * size_t
672 
 * prune_origin(name, origin)
673 
 *      Find out if the name is at or under the current origin.
674 
 * return:
675 
 *      Number of characters in name before start of origin,
676 
 *      or length of name if origin does not match.
677 
 * notes:
678 
 *      This function should share code with samedomain().
679 
 */
680 
static size_t
681 
prune_origin(const char *name, const char *origin) {
682 
        const char *oname = name;
683 
 
684 
        while (*name != '\0') {
685 
                if (origin != NULL && ns_samename(name, origin) == 1)
686 
                        return (name - oname - (name > oname));
687 
                while (*name != '\0') {
688 
                        if (*name == '\\') {
689 
                                name++;
690 
                                /* XXX need to handle \nnn form. */
691 
                                if (*name == '\0')
692 
                                        break;
693 
                        } else if (*name == '.') {
694 
                                name++;
695 
                                break;
696 
                        }
697 
                        name++;
698 
                }
699 
        }
700 
        return (name - oname);
701 
}
702 
 
703 
/*
704 
 * int
705 
 * charstr(rdata, edata, buf, buflen)
706 
 *      Format a <character-string> into the presentation buffer.
707 
 * return:
708 
 *      Number of rdata octets consumed
709 
 *      0 for protocol format error
710 
 *      -1 for output buffer error
711 
 * side effects:
712 
 *      buffer is advanced on success.
713 
 */
714 
static int
715 
charstr(const u_char *rdata, const u_char *edata, char **buf, size_t *buflen) {
716 
        const u_char *odata = rdata;
717 
        size_t save_buflen = *buflen;
718 
        char *save_buf = *buf;
719 
 
720 
        if (addstr("\"", 1, buf, buflen) < 0)
721 
                goto enospc;
722 
        if (rdata < edata) {
723 
                int n = *rdata;
724 
 
725 
                if (rdata + 1 + n <= edata) {
726 
                        rdata++;
727 
                        while (n-- > 0) {
728 
                                if (strchr("\n\"\\", *rdata) != NULL)
729 
                                        if (addstr("\\", 1, buf, buflen) < 0)
730 
                                                goto enospc;
731 
                                if (addstr((const char *)rdata, 1,
732 
                                           buf, buflen) < 0)
733 
                                        goto enospc;
734 
                                rdata++;
735 
                        }
736 
                }
737 
        }
738 
        if (addstr("\"", 1, buf, buflen) < 0)
739 
                goto enospc;
740 
        return (rdata - odata);
741 
 enospc:
742 
        __set_errno (ENOSPC);
743 
        *buf = save_buf;
744 
        *buflen = save_buflen;
745 
        return (-1);
746 
}
747 
 
748 
static int
749 
addname(const u_char *msg, size_t msglen,
750 
        const u_char **pp, const char *origin,
751 
        char **buf, size_t *buflen)
752 
{
753 
        size_t newlen, save_buflen = *buflen;
754 
        char *save_buf = *buf;
755 
        int n;
756 
 
757 
        n = dn_expand(msg, msg + msglen, *pp, *buf, *buflen);
758 
        if (n < 0)
759 
                goto enospc;    /* Guess. */
760 
        newlen = prune_origin(*buf, origin);
761 
        if (newlen == 0) {
762 
                /* Use "@" instead of name. */
763 
                if (newlen + 2 > *buflen)
764 
                        goto enospc;        /* No room for "@\0". */
765 
                (*buf)[newlen++] = '@';
766 
                (*buf)[newlen] = '\0';
767 
        } else {
768 
                if (((origin == NULL || origin[0] == '\0') ||
769 
                    (origin[0] != '.' && origin[1] != '\0' &&
770 
                    (*buf)[newlen] == '\0')) && (*buf)[newlen - 1] != '.') {
771 
                        /* No trailing dot. */
772 
                        if (newlen + 2 > *buflen)
773 
                                goto enospc;    /* No room for ".\0". */
774 
                        (*buf)[newlen++] = '.';
775 
                        (*buf)[newlen] = '\0';
776 
                }
777 
        }
778 
        *pp += n;
779 
        addlen(newlen, buf, buflen);
780 
        **buf = '\0';
781 
        return (newlen);
782 
 enospc:
783 
        __set_errno (ENOSPC);
784 
        *buf = save_buf;
785 
        *buflen = save_buflen;
786 
        return (-1);
787 
}
788 
 
789 
static void
790 
addlen(size_t len, char **buf, size_t *buflen) {
791 
        assert(len <= *buflen);
792 
        *buf += len;
793 
        *buflen -= len;
794 
}
795 
 
796 
static int
797 
addstr(const char *src, size_t len, char **buf, size_t *buflen) {
798 
        if (len >= *buflen) {
799 
                __set_errno (ENOSPC);
800 
                return (-1);
801 
        }
802 
        memcpy(*buf, src, len);
803 
        addlen(len, buf, buflen);
804 
        **buf = '\0';
805 
        return (0);
806 
}
807 
 
808 
static int
809 
addtab(size_t len, size_t target, int spaced, char **buf, size_t *buflen) {
810 
        size_t save_buflen = *buflen;
811 
        char *save_buf = *buf;
812 
        int t;
813 
 
814 
        if (spaced || len >= target - 1) {
815 
                T(addstr("  ", 2, buf, buflen));
816 
                spaced = 1;
817 
        } else {
818 
                for (t = (target - len - 1) / 8; t >= 0; t--)
819 
                        if (addstr("\t", 1, buf, buflen) < 0) {
820 
                                *buflen = save_buflen;
821 
                                *buf = save_buf;
822 
                                return (-1);
823 
                        }
824 
                spaced = 0;
825 
        }
826 
        return (spaced);
827 
}

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