| 1 | /* |
| 2 | * Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC") |
| 3 | * Copyright (C) 1999-2003 Internet Software Consortium. |
| 4 | * |
| 5 | * Permission to use, copy, modify, and/or distribute this software for any |
| 6 | * purpose with or without fee is hereby granted, provided that the above |
| 7 | * copyright notice and this permission notice appear in all copies. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH |
| 10 | * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY |
| 11 | * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, |
| 12 | * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM |
| 13 | * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE |
| 14 | * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 15 | * PERFORMANCE OF THIS SOFTWARE. |
| 16 | */ |
| 17 | |
| 18 | /* $Id: masterdump.c,v 1.89.128.5.2.1 2009/11/18 23:41:18 marka Exp $ */ |
| 19 | |
| 20 | /*! \file */ |
| 21 | |
| 22 | #include <config.h> |
| 23 | |
| 24 | #include <stdlib.h> |
| 25 | |
| 26 | #include <isc/event.h> |
| 27 | #include <isc/file.h> |
| 28 | #include <isc/magic.h> |
| 29 | #include <isc/mem.h> |
| 30 | #include <isc/print.h> |
| 31 | #include <isc/stdio.h> |
| 32 | #include <isc/string.h> |
| 33 | #include <isc/task.h> |
| 34 | #include <isc/time.h> |
| 35 | #include <isc/util.h> |
| 36 | |
| 37 | #include <dns/db.h> |
| 38 | #include <dns/dbiterator.h> |
| 39 | #include <dns/events.h> |
| 40 | #include <dns/fixedname.h> |
| 41 | #include <dns/lib.h> |
| 42 | #include <dns/log.h> |
| 43 | #include <dns/master.h> |
| 44 | #include <dns/masterdump.h> |
| 45 | #include <dns/rdata.h> |
| 46 | #include <dns/rdataclass.h> |
| 47 | #include <dns/rdataset.h> |
| 48 | #include <dns/rdatasetiter.h> |
| 49 | #include <dns/rdatatype.h> |
| 50 | #include <dns/result.h> |
| 51 | #include <dns/time.h> |
| 52 | #include <dns/ttl.h> |
| 53 | |
| 54 | #define DNS_DCTX_MAGIC ISC_MAGIC('D', 'c', 't', 'x') |
| 55 | #define DNS_DCTX_VALID(d) ISC_MAGIC_VALID(d, DNS_DCTX_MAGIC) |
| 56 | |
| 57 | #define RETERR(x) do { \ |
| 58 | isc_result_t _r = (x); \ |
| 59 | if (_r != ISC_R_SUCCESS) \ |
| 60 | return (_r); \ |
| 61 | } while (0) |
| 62 | |
| 63 | struct dns_master_style { |
| 64 | unsigned int flags; /* DNS_STYLEFLAG_* */ |
| 65 | unsigned int ttl_column; |
| 66 | unsigned int class_column; |
| 67 | unsigned int type_column; |
| 68 | unsigned int rdata_column; |
| 69 | unsigned int line_length; |
| 70 | unsigned int tab_width; |
| 71 | }; |
| 72 | |
| 73 | /*% |
| 74 | * The maximum length of the newline+indentation that is output |
| 75 | * when inserting a line break in an RR. This effectively puts an |
| 76 | * upper limits on the value of "rdata_column", because if it is |
| 77 | * very large, the tabs and spaces needed to reach it will not fit. |
| 78 | */ |
| 79 | #define DNS_TOTEXT_LINEBREAK_MAXLEN 100 |
| 80 | |
| 81 | /*% |
| 82 | * Context structure for a masterfile dump in progress. |
| 83 | */ |
| 84 | typedef struct dns_totext_ctx { |
| 85 | dns_master_style_t style; |
| 86 | isc_boolean_t class_printed; |
| 87 | char * linebreak; |
| 88 | char linebreak_buf[DNS_TOTEXT_LINEBREAK_MAXLEN]; |
| 89 | dns_name_t * origin; |
| 90 | dns_name_t * neworigin; |
| 91 | dns_fixedname_t origin_fixname; |
| 92 | isc_uint32_t current_ttl; |
| 93 | isc_boolean_t current_ttl_valid; |
| 94 | } dns_totext_ctx_t; |
| 95 | |
| 96 | LIBDNS_EXTERNAL_DATA const dns_master_style_t |
| 97 | dns_master_style_default = { |
| 98 | DNS_STYLEFLAG_OMIT_OWNER | |
| 99 | DNS_STYLEFLAG_OMIT_CLASS | |
| 100 | DNS_STYLEFLAG_REL_OWNER | |
| 101 | DNS_STYLEFLAG_REL_DATA | |
| 102 | DNS_STYLEFLAG_OMIT_TTL | |
| 103 | DNS_STYLEFLAG_TTL | |
| 104 | DNS_STYLEFLAG_COMMENT | |
| 105 | DNS_STYLEFLAG_MULTILINE, |
| 106 | 24, 24, 24, 32, 80, 8 |
| 107 | }; |
| 108 | |
| 109 | LIBDNS_EXTERNAL_DATA const dns_master_style_t |
| 110 | dns_master_style_full = { |
| 111 | DNS_STYLEFLAG_COMMENT, |
| 112 | 46, 46, 46, 64, 120, 8 |
| 113 | }; |
| 114 | |
| 115 | LIBDNS_EXTERNAL_DATA const dns_master_style_t |
| 116 | dns_master_style_explicitttl = { |
| 117 | DNS_STYLEFLAG_OMIT_OWNER | |
| 118 | DNS_STYLEFLAG_OMIT_CLASS | |
| 119 | DNS_STYLEFLAG_REL_OWNER | |
| 120 | DNS_STYLEFLAG_REL_DATA | |
| 121 | DNS_STYLEFLAG_COMMENT | |
| 122 | DNS_STYLEFLAG_MULTILINE, |
| 123 | 24, 32, 32, 40, 80, 8 |
| 124 | }; |
| 125 | |
| 126 | LIBDNS_EXTERNAL_DATA const dns_master_style_t |
| 127 | dns_master_style_cache = { |
| 128 | DNS_STYLEFLAG_OMIT_OWNER | |
| 129 | DNS_STYLEFLAG_OMIT_CLASS | |
| 130 | DNS_STYLEFLAG_MULTILINE | |
| 131 | DNS_STYLEFLAG_TRUST | |
| 132 | DNS_STYLEFLAG_NCACHE, |
| 133 | 24, 32, 32, 40, 80, 8 |
| 134 | }; |
| 135 | |
| 136 | LIBDNS_EXTERNAL_DATA const dns_master_style_t |
| 137 | dns_master_style_simple = { |
| 138 | 0, |
| 139 | 24, 32, 32, 40, 80, 8 |
| 140 | }; |
| 141 | |
| 142 | /*% |
| 143 | * A style suitable for dns_rdataset_totext(). |
| 144 | */ |
| 145 | LIBDNS_EXTERNAL_DATA const dns_master_style_t |
| 146 | dns_master_style_debug = { |
| 147 | DNS_STYLEFLAG_REL_OWNER, |
| 148 | 24, 32, 40, 48, 80, 8 |
| 149 | }; |
| 150 | |
| 151 | |
| 152 | #define N_SPACES 10 |
| 153 | static char spaces[N_SPACES+1] = " "; |
| 154 | |
| 155 | #define N_TABS 10 |
| 156 | static char tabs[N_TABS+1] = "\t\t\t\t\t\t\t\t\t\t"; |
| 157 | |
| 158 | struct dns_dumpctx { |
| 159 | unsigned int magic; |
| 160 | isc_mem_t *mctx; |
| 161 | isc_mutex_t lock; |
| 162 | unsigned int references; |
| 163 | isc_boolean_t canceled; |
| 164 | isc_boolean_t first; |
| 165 | isc_boolean_t do_date; |
| 166 | isc_stdtime_t now; |
| 167 | FILE *f; |
| 168 | dns_db_t *db; |
| 169 | dns_dbversion_t *version; |
| 170 | dns_dbiterator_t *dbiter; |
| 171 | dns_totext_ctx_t tctx; |
| 172 | isc_task_t *task; |
| 173 | dns_dumpdonefunc_t done; |
| 174 | void *done_arg; |
| 175 | unsigned int nodes; |
| 176 | /* dns_master_dumpinc() */ |
| 177 | char *file; |
| 178 | char *tmpfile; |
| 179 | dns_masterformat_t format; |
| 180 | isc_result_t (*dumpsets)(isc_mem_t *mctx, dns_name_t *name, |
| 181 | dns_rdatasetiter_t *rdsiter, |
| 182 | dns_totext_ctx_t *ctx, |
| 183 | isc_buffer_t *buffer, FILE *f); |
| 184 | }; |
| 185 | |
| 186 | #define NXDOMAIN(x) (((x)->attributes & DNS_RDATASETATTR_NXDOMAIN) != 0) |
| 187 | |
| 188 | /*% |
| 189 | * Output tabs and spaces to go from column '*current' to |
| 190 | * column 'to', and update '*current' to reflect the new |
| 191 | * current column. |
| 192 | */ |
| 193 | static isc_result_t |
| 194 | indent(unsigned int *current, unsigned int to, int tabwidth, |
| 195 | isc_buffer_t *target) |
| 196 | { |
| 197 | isc_region_t r; |
| 198 | unsigned char *p; |
| 199 | unsigned int from; |
| 200 | int ntabs, nspaces, t; |
| 201 | |
| 202 | from = *current; |
| 203 | |
| 204 | if (to < from + 1) |
| 205 | to = from + 1; |
| 206 | |
| 207 | ntabs = to / tabwidth - from / tabwidth; |
| 208 | if (ntabs < 0) |
| 209 | ntabs = 0; |
| 210 | |
| 211 | if (ntabs > 0) { |
| 212 | isc_buffer_availableregion(target, &r); |
| 213 | if (r.length < (unsigned) ntabs) |
| 214 | return (ISC_R_NOSPACE); |
| 215 | p = r.base; |
| 216 | |
| 217 | t = ntabs; |
| 218 | while (t) { |
| 219 | int n = t; |
| 220 | if (n > N_TABS) |
| 221 | n = N_TABS; |
| 222 | memcpy(p, tabs, n); |
| 223 | p += n; |
| 224 | t -= n; |
| 225 | } |
| 226 | isc_buffer_add(target, ntabs); |
| 227 | from = (to / tabwidth) * tabwidth; |
| 228 | } |
| 229 | |
| 230 | nspaces = to - from; |
| 231 | INSIST(nspaces >= 0); |
| 232 | |
| 233 | isc_buffer_availableregion(target, &r); |
| 234 | if (r.length < (unsigned) nspaces) |
| 235 | return (ISC_R_NOSPACE); |
| 236 | p = r.base; |
| 237 | |
| 238 | t = nspaces; |
| 239 | while (t) { |
| 240 | int n = t; |
| 241 | if (n > N_SPACES) |
| 242 | n = N_SPACES; |
| 243 | memcpy(p, spaces, n); |
| 244 | p += n; |
| 245 | t -= n; |
| 246 | } |
| 247 | isc_buffer_add(target, nspaces); |
| 248 | |
| 249 | *current = to; |
| 250 | return (ISC_R_SUCCESS); |
| 251 | } |
| 252 | |
| 253 | static isc_result_t |
| 254 | totext_ctx_init(const dns_master_style_t *style, dns_totext_ctx_t *ctx) { |
| 255 | isc_result_t result; |
| 256 | |
| 257 | REQUIRE(style->tab_width != 0); |
| 258 | |
| 259 | ctx->style = *style; |
| 260 | ctx->class_printed = ISC_FALSE; |
| 261 | |
| 262 | dns_fixedname_init(&ctx->origin_fixname); |
| 263 | |
| 264 | /* |
| 265 | * Set up the line break string if needed. |
| 266 | */ |
| 267 | if ((ctx->style.flags & DNS_STYLEFLAG_MULTILINE) != 0) { |
| 268 | isc_buffer_t buf; |
| 269 | isc_region_t r; |
| 270 | unsigned int col = 0; |
| 271 | |
| 272 | isc_buffer_init(&buf, ctx->linebreak_buf, |
| 273 | sizeof(ctx->linebreak_buf)); |
| 274 | |
| 275 | isc_buffer_availableregion(&buf, &r); |
| 276 | if (r.length < 1) |
| 277 | return (DNS_R_TEXTTOOLONG); |
| 278 | r.base[0] = '\n'; |
| 279 | isc_buffer_add(&buf, 1); |
| 280 | |
| 281 | result = indent(&col, ctx->style.rdata_column, |
| 282 | ctx->style.tab_width, &buf); |
| 283 | /* |
| 284 | * Do not return ISC_R_NOSPACE if the line break string |
| 285 | * buffer is too small, because that would just make |
| 286 | * dump_rdataset() retry indefinitely with ever |
| 287 | * bigger target buffers. That's a different buffer, |
| 288 | * so it won't help. Use DNS_R_TEXTTOOLONG as a substitute. |
| 289 | */ |
| 290 | if (result == ISC_R_NOSPACE) |
| 291 | return (DNS_R_TEXTTOOLONG); |
| 292 | if (result != ISC_R_SUCCESS) |
| 293 | return (result); |
| 294 | |
| 295 | isc_buffer_availableregion(&buf, &r); |
| 296 | if (r.length < 1) |
| 297 | return (DNS_R_TEXTTOOLONG); |
| 298 | r.base[0] = '\0'; |
| 299 | isc_buffer_add(&buf, 1); |
| 300 | ctx->linebreak = ctx->linebreak_buf; |
| 301 | } else { |
| 302 | ctx->linebreak = NULL; |
| 303 | } |
| 304 | |
| 305 | ctx->origin = NULL; |
| 306 | ctx->neworigin = NULL; |
| 307 | ctx->current_ttl = 0; |
| 308 | ctx->current_ttl_valid = ISC_FALSE; |
| 309 | |
| 310 | return (ISC_R_SUCCESS); |
| 311 | } |
| 312 | |
| 313 | #define INDENT_TO(col) \ |
| 314 | do { \ |
| 315 | if ((result = indent(&column, ctx->style.col, \ |
| 316 | ctx->style.tab_width, target)) \ |
| 317 | != ISC_R_SUCCESS) \ |
| 318 | return (result); \ |
| 319 | } while (0) |
| 320 | |
| 321 | |
| 322 | static isc_result_t |
| 323 | str_totext(const char *source, isc_buffer_t *target) { |
| 324 | unsigned int l; |
| 325 | isc_region_t region; |
| 326 | |
| 327 | isc_buffer_availableregion(target, ®ion); |
| 328 | l = strlen(source); |
| 329 | |
| 330 | if (l > region.length) |
| 331 | return (ISC_R_NOSPACE); |
| 332 | |
| 333 | memcpy(region.base, source, l); |
| 334 | isc_buffer_add(target, l); |
| 335 | return (ISC_R_SUCCESS); |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | * Convert 'rdataset' to master file text format according to 'ctx', |
| 340 | * storing the result in 'target'. If 'owner_name' is NULL, it |
| 341 | * is omitted; otherwise 'owner_name' must be valid and have at least |
| 342 | * one label. |
| 343 | */ |
| 344 | |
| 345 | static isc_result_t |
| 346 | rdataset_totext(dns_rdataset_t *rdataset, |
| 347 | dns_name_t *owner_name, |
| 348 | dns_totext_ctx_t *ctx, |
| 349 | isc_boolean_t omit_final_dot, |
| 350 | isc_buffer_t *target) |
| 351 | { |
| 352 | isc_result_t result; |
| 353 | unsigned int column; |
| 354 | isc_boolean_t first = ISC_TRUE; |
| 355 | isc_uint32_t current_ttl; |
| 356 | isc_boolean_t current_ttl_valid; |
| 357 | dns_rdatatype_t type; |
| 358 | |
| 359 | REQUIRE(DNS_RDATASET_VALID(rdataset)); |
| 360 | |
| 361 | rdataset->attributes |= DNS_RDATASETATTR_LOADORDER; |
| 362 | result = dns_rdataset_first(rdataset); |
| 363 | REQUIRE(result == ISC_R_SUCCESS); |
| 364 | |
| 365 | current_ttl = ctx->current_ttl; |
| 366 | current_ttl_valid = ctx->current_ttl_valid; |
| 367 | |
| 368 | do { |
| 369 | column = 0; |
| 370 | |
| 371 | /* |
| 372 | * Owner name. |
| 373 | */ |
| 374 | if (owner_name != NULL && |
| 375 | ! ((ctx->style.flags & DNS_STYLEFLAG_OMIT_OWNER) != 0 && |
| 376 | !first)) |
| 377 | { |
| 378 | unsigned int name_start = target->used; |
| 379 | RETERR(dns_name_totext(owner_name, |
| 380 | omit_final_dot, |
| 381 | target)); |
| 382 | column += target->used - name_start; |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * TTL. |
| 387 | */ |
| 388 | if ((ctx->style.flags & DNS_STYLEFLAG_NO_TTL) == 0 && |
| 389 | !((ctx->style.flags & DNS_STYLEFLAG_OMIT_TTL) != 0 && |
| 390 | current_ttl_valid && |
| 391 | rdataset->ttl == current_ttl)) |
| 392 | { |
| 393 | char ttlbuf[64]; |
| 394 | isc_region_t r; |
| 395 | unsigned int length; |
| 396 | |
| 397 | INDENT_TO(ttl_column); |
| 398 | length = snprintf(ttlbuf, sizeof(ttlbuf), "%u", |
| 399 | rdataset->ttl); |
| 400 | INSIST(length <= sizeof(ttlbuf)); |
| 401 | isc_buffer_availableregion(target, &r); |
| 402 | if (r.length < length) |
| 403 | return (ISC_R_NOSPACE); |
| 404 | memcpy(r.base, ttlbuf, length); |
| 405 | isc_buffer_add(target, length); |
| 406 | column += length; |
| 407 | |
| 408 | /* |
| 409 | * If the $TTL directive is not in use, the TTL we |
| 410 | * just printed becomes the default for subsequent RRs. |
| 411 | */ |
| 412 | if ((ctx->style.flags & DNS_STYLEFLAG_TTL) == 0) { |
| 413 | current_ttl = rdataset->ttl; |
| 414 | current_ttl_valid = ISC_TRUE; |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | /* |
| 419 | * Class. |
| 420 | */ |
| 421 | if ((ctx->style.flags & DNS_STYLEFLAG_NO_CLASS) == 0 && |
| 422 | ((ctx->style.flags & DNS_STYLEFLAG_OMIT_CLASS) == 0 || |
| 423 | ctx->class_printed == ISC_FALSE)) |
| 424 | { |
| 425 | unsigned int class_start; |
| 426 | INDENT_TO(class_column); |
| 427 | class_start = target->used; |
| 428 | result = dns_rdataclass_totext(rdataset->rdclass, |
| 429 | target); |
| 430 | if (result != ISC_R_SUCCESS) |
| 431 | return (result); |
| 432 | column += (target->used - class_start); |
| 433 | } |
| 434 | |
| 435 | /* |
| 436 | * Type. |
| 437 | */ |
| 438 | |
| 439 | if (rdataset->type == 0) { |
| 440 | type = rdataset->covers; |
| 441 | } else { |
| 442 | type = rdataset->type; |
| 443 | } |
| 444 | |
| 445 | { |
| 446 | unsigned int type_start; |
| 447 | INDENT_TO(type_column); |
| 448 | type_start = target->used; |
| 449 | if (rdataset->type == 0) |
| 450 | RETERR(str_totext("\\-", target)); |
| 451 | result = dns_rdatatype_totext(type, target); |
| 452 | if (result != ISC_R_SUCCESS) |
| 453 | return (result); |
| 454 | column += (target->used - type_start); |
| 455 | } |
| 456 | |
| 457 | /* |
| 458 | * Rdata. |
| 459 | */ |
| 460 | INDENT_TO(rdata_column); |
| 461 | if (rdataset->type == 0) { |
| 462 | if (NXDOMAIN(rdataset)) |
| 463 | RETERR(str_totext(";-$NXDOMAIN\n", target)); |
| 464 | else |
| 465 | RETERR(str_totext(";-$NXRRSET\n", target)); |
| 466 | } else { |
| 467 | dns_rdata_t rdata = DNS_RDATA_INIT; |
| 468 | isc_region_t r; |
| 469 | |
| 470 | dns_rdataset_current(rdataset, &rdata); |
| 471 | |
| 472 | RETERR(dns_rdata_tofmttext(&rdata, |
| 473 | ctx->origin, |
| 474 | ctx->style.flags, |
| 475 | ctx->style.line_length - |
| 476 | ctx->style.rdata_column, |
| 477 | ctx->linebreak, |
| 478 | target)); |
| 479 | |
| 480 | isc_buffer_availableregion(target, &r); |
| 481 | if (r.length < 1) |
| 482 | return (ISC_R_NOSPACE); |
| 483 | r.base[0] = '\n'; |
| 484 | isc_buffer_add(target, 1); |
| 485 | } |
| 486 | |
| 487 | first = ISC_FALSE; |
| 488 | result = dns_rdataset_next(rdataset); |
| 489 | } while (result == ISC_R_SUCCESS); |
| 490 | |
| 491 | if (result != ISC_R_NOMORE) |
| 492 | return (result); |
| 493 | |
| 494 | /* |
| 495 | * Update the ctx state to reflect what we just printed. |
| 496 | * This is done last, only when we are sure we will return |
| 497 | * success, because this function may be called multiple |
| 498 | * times with increasing buffer sizes until it succeeds, |
| 499 | * and failed attempts must not update the state prematurely. |
| 500 | */ |
| 501 | ctx->class_printed = ISC_TRUE; |
| 502 | ctx->current_ttl= current_ttl; |
| 503 | ctx->current_ttl_valid = current_ttl_valid; |
| 504 | |
| 505 | return (ISC_R_SUCCESS); |
| 506 | } |
| 507 | |
| 508 | /* |
| 509 | * Print the name, type, and class of an empty rdataset, |
| 510 | * such as those used to represent the question section |
| 511 | * of a DNS message. |
| 512 | */ |
| 513 | static isc_result_t |
| 514 | question_totext(dns_rdataset_t *rdataset, |
| 515 | dns_name_t *owner_name, |
| 516 | dns_totext_ctx_t *ctx, |
| 517 | isc_boolean_t omit_final_dot, |
| 518 | isc_buffer_t *target) |
| 519 | { |
| 520 | unsigned int column; |
| 521 | isc_result_t result; |
| 522 | isc_region_t r; |
| 523 | |
| 524 | REQUIRE(DNS_RDATASET_VALID(rdataset)); |
| 525 | result = dns_rdataset_first(rdataset); |
| 526 | REQUIRE(result == ISC_R_NOMORE); |
| 527 | |
| 528 | column = 0; |
| 529 | |
| 530 | /* Owner name */ |
| 531 | { |
| 532 | unsigned int name_start = target->used; |
| 533 | RETERR(dns_name_totext(owner_name, |
| 534 | omit_final_dot, |
| 535 | target)); |
| 536 | column += target->used - name_start; |
| 537 | } |
| 538 | |
| 539 | /* Class */ |
| 540 | { |
| 541 | unsigned int class_start; |
| 542 | INDENT_TO(class_column); |
| 543 | class_start = target->used; |
| 544 | result = dns_rdataclass_totext(rdataset->rdclass, target); |
| 545 | if (result != ISC_R_SUCCESS) |
| 546 | return (result); |
| 547 | column += (target->used - class_start); |
| 548 | } |
| 549 | |
| 550 | /* Type */ |
| 551 | { |
| 552 | unsigned int type_start; |
| 553 | INDENT_TO(type_column); |
| 554 | type_start = target->used; |
| 555 | result = dns_rdatatype_totext(rdataset->type, target); |
| 556 | if (result != ISC_R_SUCCESS) |
| 557 | return (result); |
| 558 | column += (target->used - type_start); |
| 559 | } |
| 560 | |
| 561 | isc_buffer_availableregion(target, &r); |
| 562 | if (r.length < 1) |
| 563 | return (ISC_R_NOSPACE); |
| 564 | r.base[0] = '\n'; |
| 565 | isc_buffer_add(target, 1); |
| 566 | |
| 567 | return (ISC_R_SUCCESS); |
| 568 | } |
| 569 | |
| 570 | isc_result_t |
| 571 | dns_rdataset_totext(dns_rdataset_t *rdataset, |
| 572 | dns_name_t *owner_name, |
| 573 | isc_boolean_t omit_final_dot, |
| 574 | isc_boolean_t question, |
| 575 | isc_buffer_t *target) |
| 576 | { |
| 577 | dns_totext_ctx_t ctx; |
| 578 | isc_result_t result; |
| 579 | result = totext_ctx_init(&dns_master_style_debug, &ctx); |
| 580 | if (result != ISC_R_SUCCESS) { |
| 581 | UNEXPECTED_ERROR(__FILE__, __LINE__, |
| 582 | "could not set master file style"); |
| 583 | return (ISC_R_UNEXPECTED); |
| 584 | } |
| 585 | |
| 586 | /* |
| 587 | * The caller might want to give us an empty owner |
| 588 | * name (e.g. if they are outputting into a master |
| 589 | * file and this rdataset has the same name as the |
| 590 | * previous one.) |
| 591 | */ |
| 592 | if (dns_name_countlabels(owner_name) == 0) |
| 593 | owner_name = NULL; |
| 594 | |
| 595 | if (question) |
| 596 | return (question_totext(rdataset, owner_name, &ctx, |
| 597 | omit_final_dot, target)); |
| 598 | else |
| 599 | return (rdataset_totext(rdataset, owner_name, &ctx, |
| 600 | omit_final_dot, target)); |
| 601 | } |
| 602 | |
| 603 | isc_result_t |
| 604 | dns_master_rdatasettotext(dns_name_t *owner_name, |
| 605 | dns_rdataset_t *rdataset, |
| 606 | const dns_master_style_t *style, |
| 607 | isc_buffer_t *target) |
| 608 | { |
| 609 | dns_totext_ctx_t ctx; |
| 610 | isc_result_t result; |
| 611 | result = totext_ctx_init(style, &ctx); |
| 612 | if (result != ISC_R_SUCCESS) { |
| 613 | UNEXPECTED_ERROR(__FILE__, __LINE__, |
| 614 | "could not set master file style"); |
| 615 | return (ISC_R_UNEXPECTED); |
| 616 | } |
| 617 | |
| 618 | return (rdataset_totext(rdataset, owner_name, &ctx, |
| 619 | ISC_FALSE, target)); |
| 620 | } |
| 621 | |
| 622 | isc_result_t |
| 623 | dns_master_questiontotext(dns_name_t *owner_name, |
| 624 | dns_rdataset_t *rdataset, |
| 625 | const dns_master_style_t *style, |
| 626 | isc_buffer_t *target) |
| 627 | { |
| 628 | dns_totext_ctx_t ctx; |
| 629 | isc_result_t result; |
| 630 | result = totext_ctx_init(style, &ctx); |
| 631 | if (result != ISC_R_SUCCESS) { |
| 632 | UNEXPECTED_ERROR(__FILE__, __LINE__, |
| 633 | "could not set master file style"); |
| 634 | return (ISC_R_UNEXPECTED); |
| 635 | } |
| 636 | |
| 637 | return (question_totext(rdataset, owner_name, &ctx, |
| 638 | ISC_FALSE, target)); |
| 639 | } |
| 640 | |
| 641 | /* |
| 642 | * Print an rdataset. 'buffer' is a scratch buffer, which must have been |
| 643 | * dynamically allocated by the caller. It must be large enough to |
| 644 | * hold the result from dns_ttl_totext(). If more than that is needed, |
| 645 | * the buffer will be grown automatically. |
| 646 | */ |
| 647 | |
| 648 | static isc_result_t |
| 649 | dump_rdataset(isc_mem_t *mctx, dns_name_t *name, dns_rdataset_t *rdataset, |
| 650 | dns_totext_ctx_t *ctx, |
| 651 | isc_buffer_t *buffer, FILE *f) |
| 652 | { |
| 653 | isc_region_t r; |
| 654 | isc_result_t result; |
| 655 | |
| 656 | REQUIRE(buffer->length > 0); |
| 657 | |
| 658 | /* |
| 659 | * Output a $TTL directive if needed. |
| 660 | */ |
| 661 | |
| 662 | if ((ctx->style.flags & DNS_STYLEFLAG_TTL) != 0) { |
| 663 | if (ctx->current_ttl_valid == ISC_FALSE || |
| 664 | ctx->current_ttl != rdataset->ttl) |
| 665 | { |
| 666 | if ((ctx->style.flags & DNS_STYLEFLAG_COMMENT) != 0) |
| 667 | { |
| 668 | isc_buffer_clear(buffer); |
| 669 | result = dns_ttl_totext(rdataset->ttl, |
| 670 | ISC_TRUE, buffer); |
| 671 | INSIST(result == ISC_R_SUCCESS); |
| 672 | isc_buffer_usedregion(buffer, &r); |
| 673 | fprintf(f, "$TTL %u\t; %.*s\n", rdataset->ttl, |
| 674 | (int) r.length, (char *) r.base); |
| 675 | } else { |
| 676 | fprintf(f, "$TTL %u\n", rdataset->ttl); |
| 677 | } |
| 678 | ctx->current_ttl = rdataset->ttl; |
| 679 | ctx->current_ttl_valid = ISC_TRUE; |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | isc_buffer_clear(buffer); |
| 684 | |
| 685 | /* |
| 686 | * Generate the text representation of the rdataset into |
| 687 | * the buffer. If the buffer is too small, grow it. |
| 688 | */ |
| 689 | for (;;) { |
| 690 | int newlength; |
| 691 | void *newmem; |
| 692 | result = rdataset_totext(rdataset, name, ctx, |
| 693 | ISC_FALSE, buffer); |
| 694 | if (result != ISC_R_NOSPACE) |
| 695 | break; |
| 696 | |
| 697 | newlength = buffer->length * 2; |
| 698 | newmem = isc_mem_get(mctx, newlength); |
| 699 | if (newmem == NULL) |
| 700 | return (ISC_R_NOMEMORY); |
| 701 | isc_mem_put(mctx, buffer->base, buffer->length); |
| 702 | isc_buffer_init(buffer, newmem, newlength); |
| 703 | } |
| 704 | if (result != ISC_R_SUCCESS) |
| 705 | return (result); |
| 706 | |
| 707 | /* |
| 708 | * Write the buffer contents to the master file. |
| 709 | */ |
| 710 | isc_buffer_usedregion(buffer, &r); |
| 711 | result = isc_stdio_write(r.base, 1, (size_t)r.length, f, NULL); |
| 712 | |
| 713 | if (result != ISC_R_SUCCESS) { |
| 714 | UNEXPECTED_ERROR(__FILE__, __LINE__, |
| 715 | "master file write failed: %s", |
| 716 | isc_result_totext(result)); |
| 717 | return (result); |
| 718 | } |
| 719 | |
| 720 | return (ISC_R_SUCCESS); |
| 721 | } |
| 722 | |
| 723 | /* |
| 724 | * Define the order in which rdatasets should be printed in zone |
| 725 | * files. We will print SOA and NS records before others, SIGs |
| 726 | * immediately following the things they sign, and order everything |
| 727 | * else by RR number. This is all just for aesthetics and |
| 728 | * compatibility with buggy software that expects the SOA to be first; |
| 729 | * the DNS specifications allow any order. |
| 730 | */ |
| 731 | |
| 732 | static int |
| 733 | dump_order(const dns_rdataset_t *rds) { |
| 734 | int t; |
| 735 | int sig; |
| 736 | if (rds->type == dns_rdatatype_rrsig) { |
| 737 | t = rds->covers; |
| 738 | sig = 1; |
| 739 | } else { |
| 740 | t = rds->type; |
| 741 | sig = 0; |
| 742 | } |
| 743 | switch (t) { |
| 744 | case dns_rdatatype_soa: |
| 745 | t = 0; |
| 746 | break; |
| 747 | case dns_rdatatype_ns: |
| 748 | t = 1; |
| 749 | break; |
| 750 | default: |
| 751 | t += 2; |
| 752 | break; |
| 753 | } |
| 754 | return (t << 1) + sig; |
| 755 | } |
| 756 | |
| 757 | static int |
| 758 | dump_order_compare(const void *a, const void *b) { |
| 759 | return (dump_order(*((const dns_rdataset_t * const *) a)) - |
| 760 | dump_order(*((const dns_rdataset_t * const *) b))); |
| 761 | } |
| 762 | |
| 763 | /* |
| 764 | * Dump all the rdatasets of a domain name to a master file. We make |
| 765 | * a "best effort" attempt to sort the RRsets in a nice order, but if |
| 766 | * there are more than MAXSORT RRsets, we punt and only sort them in |
| 767 | * groups of MAXSORT. This is not expected to ever happen in practice |
| 768 | * since much less than 64 RR types have been registered with the |
| 769 | * IANA, so far, and the output will be correct (though not |
| 770 | * aesthetically pleasing) even if it does happen. |
| 771 | */ |
| 772 | |
| 773 | #define MAXSORT 64 |
| 774 | |
| 775 | static const char *trustnames[] = { |
| 776 | "none", |
| 777 | "pending-additional", |
| 778 | "pending-answer", |
| 779 | "additional", |
| 780 | "glue", |
| 781 | "answer", |
| 782 | "authauthority", |
| 783 | "authanswer", |
| 784 | "secure", |
| 785 | "local" /* aka ultimate */ |
| 786 | }; |
| 787 | |
| 788 | static isc_result_t |
| 789 | dump_rdatasets_text(isc_mem_t *mctx, dns_name_t *name, |
| 790 | dns_rdatasetiter_t *rdsiter, dns_totext_ctx_t *ctx, |
| 791 | isc_buffer_t *buffer, FILE *f) |
| 792 | { |
| 793 | isc_result_t itresult, dumpresult; |
| 794 | isc_region_t r; |
| 795 | dns_rdataset_t rdatasets[MAXSORT]; |
| 796 | dns_rdataset_t *sorted[MAXSORT]; |
| 797 | int i, n; |
| 798 | |
| 799 | itresult = dns_rdatasetiter_first(rdsiter); |
| 800 | dumpresult = ISC_R_SUCCESS; |
| 801 | |
| 802 | if (itresult == ISC_R_SUCCESS && ctx->neworigin != NULL) { |
| 803 | isc_buffer_clear(buffer); |
| 804 | itresult = dns_name_totext(ctx->neworigin, ISC_FALSE, buffer); |
| 805 | RUNTIME_CHECK(itresult == ISC_R_SUCCESS); |
| 806 | isc_buffer_usedregion(buffer, &r); |
| 807 | fprintf(f, "$ORIGIN %.*s\n", (int) r.length, (char *) r.base); |
| 808 | ctx->neworigin = NULL; |
| 809 | } |
| 810 | |
| 811 | again: |
| 812 | for (i = 0; |
| 813 | itresult == ISC_R_SUCCESS && i < MAXSORT; |
| 814 | itresult = dns_rdatasetiter_next(rdsiter), i++) { |
| 815 | dns_rdataset_init(&rdatasets[i]); |
| 816 | dns_rdatasetiter_current(rdsiter, &rdatasets[i]); |
| 817 | sorted[i] = &rdatasets[i]; |
| 818 | } |
| 819 | n = i; |
| 820 | INSIST(n <= MAXSORT); |
| 821 | |
| 822 | qsort(sorted, n, sizeof(sorted[0]), dump_order_compare); |
| 823 | |
| 824 | for (i = 0; i < n; i++) { |
| 825 | dns_rdataset_t *rds = sorted[i]; |
| 826 | if (ctx->style.flags & DNS_STYLEFLAG_TRUST) { |
| 827 | unsigned int trust = rds->trust; |
| 828 | INSIST(trust < (sizeof(trustnames) / |
| 829 | sizeof(trustnames[0]))); |
| 830 | fprintf(f, "; %s\n", trustnames[trust]); |
| 831 | } |
| 832 | if (rds->type == 0 && |
| 833 | (ctx->style.flags & DNS_STYLEFLAG_NCACHE) == 0) { |
| 834 | /* Omit negative cache entries */ |
| 835 | } else { |
| 836 | isc_result_t result = |
| 837 | dump_rdataset(mctx, name, rds, ctx, |
| 838 | buffer, f); |
| 839 | if (result != ISC_R_SUCCESS) |
| 840 | dumpresult = result; |
| 841 | if ((ctx->style.flags & DNS_STYLEFLAG_OMIT_OWNER) != 0) |
| 842 | name = NULL; |
| 843 | } |
| 844 | dns_rdataset_disassociate(rds); |
| 845 | } |
| 846 | |
| 847 | if (dumpresult != ISC_R_SUCCESS) |
| 848 | return (dumpresult); |
| 849 | |
| 850 | /* |
| 851 | * If we got more data than could be sorted at once, |
| 852 | * go handle the rest. |
| 853 | */ |
| 854 | if (itresult == ISC_R_SUCCESS) |
| 855 | goto again; |
| 856 | |
| 857 | if (itresult == ISC_R_NOMORE) |
| 858 | itresult = ISC_R_SUCCESS; |
| 859 | |
| 860 | return (itresult); |
| 861 | } |
| 862 | |
| 863 | /* |
| 864 | * Dump given RRsets in the "raw" format. |
| 865 | */ |
| 866 | static isc_result_t |
| 867 | dump_rdataset_raw(isc_mem_t *mctx, dns_name_t *name, dns_rdataset_t *rdataset, |
| 868 | isc_buffer_t *buffer, FILE *f) |
| 869 | { |
| 870 | isc_result_t result; |
| 871 | isc_uint32_t totallen; |
| 872 | isc_uint16_t dlen; |
| 873 | isc_region_t r, r_hdr; |
| 874 | |
| 875 | REQUIRE(buffer->length > 0); |
| 876 | REQUIRE(DNS_RDATASET_VALID(rdataset)); |
| 877 | |
| 878 | restart: |
| 879 | totallen = 0; |
| 880 | result = dns_rdataset_first(rdataset); |
| 881 | REQUIRE(result == ISC_R_SUCCESS); |
| 882 | |
| 883 | isc_buffer_clear(buffer); |
| 884 | |
| 885 | /* |
| 886 | * Common header and owner name (length followed by name) |
| 887 | * These fields should be in a moderate length, so we assume we |
| 888 | * can store all of them in the initial buffer. |
| 889 | */ |
| 890 | isc_buffer_availableregion(buffer, &r_hdr); |
| 891 | INSIST(r_hdr.length >= sizeof(dns_masterrawrdataset_t)); |
| 892 | isc_buffer_putuint32(buffer, totallen); /* XXX: leave space */ |
| 893 | isc_buffer_putuint16(buffer, rdataset->rdclass); /* 16-bit class */ |
| 894 | isc_buffer_putuint16(buffer, rdataset->type); /* 16-bit type */ |
| 895 | isc_buffer_putuint16(buffer, rdataset->covers); /* same as type */ |
| 896 | isc_buffer_putuint32(buffer, rdataset->ttl); /* 32-bit TTL */ |
| 897 | isc_buffer_putuint32(buffer, dns_rdataset_count(rdataset)); |
| 898 | totallen = isc_buffer_usedlength(buffer); |
| 899 | INSIST(totallen <= sizeof(dns_masterrawrdataset_t)); |
| 900 | |
| 901 | dns_name_toregion(name, &r); |
| 902 | INSIST(isc_buffer_availablelength(buffer) >= |
| 903 | (sizeof(dlen) + r.length)); |
| 904 | dlen = (isc_uint16_t)r.length; |
| 905 | isc_buffer_putuint16(buffer, dlen); |
| 906 | isc_buffer_copyregion(buffer, &r); |
| 907 | totallen += sizeof(dlen) + r.length; |
| 908 | |
| 909 | do { |
| 910 | dns_rdata_t rdata = DNS_RDATA_INIT; |
| 911 | isc_region_t r; |
| 912 | |
| 913 | dns_rdataset_current(rdataset, &rdata); |
| 914 | dns_rdata_toregion(&rdata, &r); |
| 915 | INSIST(r.length <= 0xffffU); |
| 916 | dlen = (isc_uint16_t)r.length; |
| 917 | |
| 918 | /* |
| 919 | * Copy the rdata into the buffer. If the buffer is too small, |
| 920 | * grow it. This should be rare, so we'll simply restart the |
| 921 | * entire procedure (or should we copy the old data and |
| 922 | * continue?). |
| 923 | */ |
| 924 | if (isc_buffer_availablelength(buffer) < |
| 925 | sizeof(dlen) + r.length) { |
| 926 | int newlength; |
| 927 | void *newmem; |
| 928 | |
| 929 | newlength = buffer->length * 2; |
| 930 | newmem = isc_mem_get(mctx, newlength); |
| 931 | if (newmem == NULL) |
| 932 | return (ISC_R_NOMEMORY); |
| 933 | isc_mem_put(mctx, buffer->base, buffer->length); |
| 934 | isc_buffer_init(buffer, newmem, newlength); |
| 935 | goto restart; |
| 936 | } |
| 937 | isc_buffer_putuint16(buffer, dlen); |
| 938 | isc_buffer_copyregion(buffer, &r); |
| 939 | totallen += sizeof(dlen) + r.length; |
| 940 | |
| 941 | result = dns_rdataset_next(rdataset); |
| 942 | } while (result == ISC_R_SUCCESS); |
| 943 | |
| 944 | if (result != ISC_R_NOMORE) |
| 945 | return (result); |
| 946 | |
| 947 | /* |
| 948 | * Fill in the total length field. |
| 949 | * XXX: this is a bit tricky. Since we have already "used" the space |
| 950 | * for the total length in the buffer, we first remember the entire |
| 951 | * buffer length in the region, "rewind", and then write the value. |
| 952 | */ |
| 953 | isc_buffer_usedregion(buffer, &r); |
| 954 | isc_buffer_clear(buffer); |
| 955 | isc_buffer_putuint32(buffer, totallen); |
| 956 | INSIST(isc_buffer_usedlength(buffer) < totallen); |
| 957 | |
| 958 | /* |
| 959 | * Write the buffer contents to the raw master file. |
| 960 | */ |
| 961 | result = isc_stdio_write(r.base, 1, (size_t)r.length, f, NULL); |
| 962 | |
| 963 | if (result != ISC_R_SUCCESS) { |
| 964 | UNEXPECTED_ERROR(__FILE__, __LINE__, |
| 965 | "raw master file write failed: %s", |
| 966 | isc_result_totext(result)); |
| 967 | return (result); |
| 968 | } |
| 969 | |
| 970 | return (result); |
| 971 | } |
| 972 | |
| 973 | static isc_result_t |
| 974 | dump_rdatasets_raw(isc_mem_t *mctx, dns_name_t *name, |
| 975 | dns_rdatasetiter_t *rdsiter, dns_totext_ctx_t *ctx, |
| 976 | isc_buffer_t *buffer, FILE *f) |
| 977 | { |
| 978 | isc_result_t result; |
| 979 | dns_rdataset_t rdataset; |
| 980 | |
| 981 | for (result = dns_rdatasetiter_first(rdsiter); |
| 982 | result == ISC_R_SUCCESS; |
| 983 | result = dns_rdatasetiter_next(rdsiter)) { |
| 984 | |
| 985 | dns_rdataset_init(&rdataset); |
| 986 | dns_rdatasetiter_current(rdsiter, &rdataset); |
| 987 | |
| 988 | if (rdataset.type == 0 && |
| 989 | (ctx->style.flags & DNS_STYLEFLAG_NCACHE) == 0) { |
| 990 | /* Omit negative cache entries */ |
| 991 | } else { |
| 992 | result = dump_rdataset_raw(mctx, name, &rdataset, |
| 993 | buffer, f); |
| 994 | } |
| 995 | dns_rdataset_disassociate(&rdataset); |
| 996 | } |
| 997 | |
| 998 | if (result == ISC_R_NOMORE) |
| 999 | result = ISC_R_SUCCESS; |
| 1000 | |
| 1001 | return (result); |
| 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | * Initial size of text conversion buffer. The buffer is used |
| 1006 | * for several purposes: converting origin names, rdatasets, |
| 1007 | * $DATE timestamps, and comment strings for $TTL directives. |
| 1008 | * |
| 1009 | * When converting rdatasets, it is dynamically resized, but |
| 1010 | * when converting origins, timestamps, etc it is not. Therefore, |
| 1011 | * the initial size must large enough to hold the longest possible |
| 1012 | * text representation of any domain name (for $ORIGIN). |
| 1013 | */ |
| 1014 | static const int initial_buffer_length = 1200; |
| 1015 | |
| 1016 | static isc_result_t |
| 1017 | dumptostreaminc(dns_dumpctx_t *dctx); |
| 1018 | |
| 1019 | static void |
| 1020 | dumpctx_destroy(dns_dumpctx_t *dctx) { |
| 1021 | |
| 1022 | dctx->magic = 0; |
| 1023 | DESTROYLOCK(&dctx->lock); |
| 1024 | dns_dbiterator_destroy(&dctx->dbiter); |
| 1025 | if (dctx->version != NULL) |
| 1026 | dns_db_closeversion(dctx->db, &dctx->version, ISC_FALSE); |
| 1027 | dns_db_detach(&dctx->db); |
| 1028 | if (dctx->task != NULL) |
| 1029 | isc_task_detach(&dctx->task); |
| 1030 | if (dctx->file != NULL) |
| 1031 | isc_mem_free(dctx->mctx, dctx->file); |
| 1032 | if (dctx->tmpfile != NULL) |
| 1033 | isc_mem_free(dctx->mctx, dctx->tmpfile); |
| 1034 | isc_mem_putanddetach(&dctx->mctx, dctx, sizeof(*dctx)); |
| 1035 | } |
| 1036 | |
| 1037 | void |
| 1038 | dns_dumpctx_attach(dns_dumpctx_t *source, dns_dumpctx_t **target) { |
| 1039 | |
| 1040 | REQUIRE(DNS_DCTX_VALID(source)); |
| 1041 | REQUIRE(target != NULL && *target == NULL); |
| 1042 | |
| 1043 | LOCK(&source->lock); |
| 1044 | INSIST(source->references > 0); |
| 1045 | source->references++; |
| 1046 | INSIST(source->references != 0); /* Overflow? */ |
| 1047 | UNLOCK(&source->lock); |
| 1048 | |
| 1049 | *target = source; |
| 1050 | } |
| 1051 | |
| 1052 | void |
| 1053 | dns_dumpctx_detach(dns_dumpctx_t **dctxp) { |
| 1054 | dns_dumpctx_t *dctx; |
| 1055 | isc_boolean_t need_destroy = ISC_FALSE; |
| 1056 | |
| 1057 | REQUIRE(dctxp != NULL); |
| 1058 | dctx = *dctxp; |
| 1059 | REQUIRE(DNS_DCTX_VALID(dctx)); |
| 1060 | |
| 1061 | *dctxp = NULL; |
| 1062 | |
| 1063 | LOCK(&dctx->lock); |
| 1064 | INSIST(dctx->references != 0); |
| 1065 | dctx->references--; |
| 1066 | if (dctx->references == 0) |
| 1067 | need_destroy = ISC_TRUE; |
| 1068 | UNLOCK(&dctx->lock); |
| 1069 | if (need_destroy) |
| 1070 | dumpctx_destroy(dctx); |
| 1071 | } |
| 1072 | |
| 1073 | dns_dbversion_t * |
| 1074 | dns_dumpctx_version(dns_dumpctx_t *dctx) { |
| 1075 | REQUIRE(DNS_DCTX_VALID(dctx)); |
| 1076 | return (dctx->version); |
| 1077 | } |
| 1078 | |
| 1079 | dns_db_t * |
| 1080 | dns_dumpctx_db(dns_dumpctx_t *dctx) { |
| 1081 | REQUIRE(DNS_DCTX_VALID(dctx)); |
| 1082 | return (dctx->db); |
| 1083 | } |
| 1084 | |
| 1085 | void |
| 1086 | dns_dumpctx_cancel(dns_dumpctx_t *dctx) { |
| 1087 | REQUIRE(DNS_DCTX_VALID(dctx)); |
| 1088 | |
| 1089 | LOCK(&dctx->lock); |
| 1090 | dctx->canceled = ISC_TRUE; |
| 1091 | UNLOCK(&dctx->lock); |
| 1092 | } |
| 1093 | |
| 1094 | static isc_result_t |
| 1095 | closeandrename(FILE *f, isc_result_t result, const char *temp, const char *file) |
| 1096 | { |
| 1097 | isc_result_t tresult; |
| 1098 | isc_boolean_t logit = ISC_TF(result == ISC_R_SUCCESS); |
| 1099 | |
| 1100 | if (result == ISC_R_SUCCESS) |
| 1101 | result = isc_stdio_sync(f); |
| 1102 | if (result != ISC_R_SUCCESS && logit) { |
| 1103 | isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, |
| 1104 | DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, |
| 1105 | "dumping master file: %s: fsync: %s", |
| 1106 | temp, isc_result_totext(result)); |
| 1107 | logit = ISC_FALSE; |
| 1108 | } |
| 1109 | tresult = isc_stdio_close(f); |
| 1110 | if (result == ISC_R_SUCCESS) |
| 1111 | result = tresult; |
| 1112 | if (result != ISC_R_SUCCESS && logit) { |
| 1113 | isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, |
| 1114 | DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, |
| 1115 | "dumping master file: %s: fclose: %s", |
| 1116 | temp, isc_result_totext(result)); |
| 1117 | logit = ISC_FALSE; |
| 1118 | } |
| 1119 | if (result == ISC_R_SUCCESS) |
| 1120 | result = isc_file_rename(temp, file); |
| 1121 | else |
| 1122 | (void)isc_file_remove(temp); |
| 1123 | if (result != ISC_R_SUCCESS && logit) { |
| 1124 | isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, |
| 1125 | DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, |
| 1126 | "dumping master file: rename: %s: %s", |
| 1127 | file, isc_result_totext(result)); |
| 1128 | } |
| 1129 | return (result); |
| 1130 | } |
| 1131 | |
| 1132 | static void |
| 1133 | dump_quantum(isc_task_t *task, isc_event_t *event) { |
| 1134 | isc_result_t result; |
| 1135 | isc_result_t tresult; |
| 1136 | dns_dumpctx_t *dctx; |
| 1137 | |
| 1138 | REQUIRE(event != NULL); |
| 1139 | dctx = event->ev_arg; |
| 1140 | REQUIRE(DNS_DCTX_VALID(dctx)); |
| 1141 | if (dctx->canceled) |
| 1142 | result = ISC_R_CANCELED; |
| 1143 | else |
| 1144 | result = dumptostreaminc(dctx); |
| 1145 | if (result == DNS_R_CONTINUE) { |
| 1146 | event->ev_arg = dctx; |
| 1147 | isc_task_send(task, &event); |
| 1148 | return; |
| 1149 | } |
| 1150 | |
| 1151 | if (dctx->file != NULL) { |
| 1152 | tresult = closeandrename(dctx->f, result, |
| 1153 | dctx->tmpfile, dctx->file); |
| 1154 | if (tresult != ISC_R_SUCCESS && result == ISC_R_SUCCESS) |
| 1155 | result = tresult; |
| 1156 | } |
| 1157 | (dctx->done)(dctx->done_arg, result); |
| 1158 | isc_event_free(&event); |
| 1159 | dns_dumpctx_detach(&dctx); |
| 1160 | } |
| 1161 | |
| 1162 | static isc_result_t |
| 1163 | task_send(dns_dumpctx_t *dctx) { |
| 1164 | isc_event_t *event; |
| 1165 | |
| 1166 | event = isc_event_allocate(dctx->mctx, NULL, DNS_EVENT_DUMPQUANTUM, |
| 1167 | dump_quantum, dctx, sizeof(*event)); |
| 1168 | if (event == NULL) |
| 1169 | return (ISC_R_NOMEMORY); |
| 1170 | isc_task_send(dctx->task, &event); |
| 1171 | return (ISC_R_SUCCESS); |
| 1172 | } |
| 1173 | |
| 1174 | static isc_result_t |
| 1175 | dumpctx_create(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, |
| 1176 | const dns_master_style_t *style, FILE *f, dns_dumpctx_t **dctxp, |
| 1177 | dns_masterformat_t format) |
| 1178 | { |
| 1179 | dns_dumpctx_t *dctx; |
| 1180 | isc_result_t result; |
| 1181 | isc_boolean_t relative; |
| 1182 | |
| 1183 | dctx = isc_mem_get(mctx, sizeof(*dctx)); |
| 1184 | if (dctx == NULL) |
| 1185 | return (ISC_R_NOMEMORY); |
| 1186 | |
| 1187 | dctx->mctx = NULL; |
| 1188 | dctx->f = f; |
| 1189 | dctx->dbiter = NULL; |
| 1190 | dctx->db = NULL; |
| 1191 | dctx->version = NULL; |
| 1192 | dctx->done = NULL; |
| 1193 | dctx->done_arg = NULL; |
| 1194 | dctx->task = NULL; |
| 1195 | dctx->nodes = 0; |
| 1196 | dctx->first = ISC_TRUE; |
| 1197 | dctx->canceled = ISC_FALSE; |
| 1198 | dctx->file = NULL; |
| 1199 | dctx->tmpfile = NULL; |
| 1200 | dctx->format = format; |
| 1201 | |
| 1202 | switch (format) { |
| 1203 | case dns_masterformat_text: |
| 1204 | dctx->dumpsets = dump_rdatasets_text; |
| 1205 | break; |
| 1206 | case dns_masterformat_raw: |
| 1207 | dctx->dumpsets = dump_rdatasets_raw; |
| 1208 | break; |
| 1209 | default: |
| 1210 | INSIST(0); |
| 1211 | break; |
| 1212 | } |
| 1213 | |
| 1214 | result = totext_ctx_init(style, &dctx->tctx); |
| 1215 | if (result != ISC_R_SUCCESS) { |
| 1216 | UNEXPECTED_ERROR(__FILE__, __LINE__, |
| 1217 | "could not set master file style"); |
| 1218 | goto cleanup; |
| 1219 | } |
| 1220 | |
| 1221 | isc_stdtime_get(&dctx->now); |
| 1222 | dns_db_attach(db, &dctx->db); |
| 1223 | |
| 1224 | dctx->do_date = dns_db_iscache(dctx->db); |
| 1225 | |
| 1226 | if (dctx->format == dns_masterformat_text && |
| 1227 | (dctx->tctx.style.flags & DNS_STYLEFLAG_REL_OWNER) != 0) { |
| 1228 | relative = ISC_TRUE; |
| 1229 | } else |
| 1230 | relative = ISC_FALSE; |
| 1231 | result = dns_db_createiterator(dctx->db, relative, &dctx->dbiter); |
| 1232 | if (result != ISC_R_SUCCESS) |
| 1233 | goto cleanup; |
| 1234 | |
| 1235 | result = isc_mutex_init(&dctx->lock); |
| 1236 | if (result != ISC_R_SUCCESS) |
| 1237 | goto cleanup; |
| 1238 | if (version != NULL) |
| 1239 | dns_db_attachversion(dctx->db, version, &dctx->version); |
| 1240 | else if (!dns_db_iscache(db)) |
| 1241 | dns_db_currentversion(dctx->db, &dctx->version); |
| 1242 | isc_mem_attach(mctx, &dctx->mctx); |
| 1243 | dctx->references = 1; |
| 1244 | dctx->magic = DNS_DCTX_MAGIC; |
| 1245 | *dctxp = dctx; |
| 1246 | return (ISC_R_SUCCESS); |
| 1247 | |
| 1248 | cleanup: |
| 1249 | if (dctx->dbiter != NULL) |
| 1250 | dns_dbiterator_destroy(&dctx->dbiter); |
| 1251 | if (dctx->db != NULL) |
| 1252 | dns_db_detach(&dctx->db); |
| 1253 | if (dctx != NULL) |
| 1254 | isc_mem_put(mctx, dctx, sizeof(*dctx)); |
| 1255 | return (result); |
| 1256 | } |
| 1257 | |
| 1258 | static isc_result_t |
| 1259 | dumptostreaminc(dns_dumpctx_t *dctx) { |
| 1260 | isc_result_t result; |
| 1261 | isc_buffer_t buffer; |
| 1262 | char *bufmem; |
| 1263 | isc_region_t r; |
| 1264 | dns_name_t *name; |
| 1265 | dns_fixedname_t fixname; |
| 1266 | unsigned int nodes; |
| 1267 | dns_masterrawheader_t rawheader; |
| 1268 | isc_uint32_t now32; |
| 1269 | isc_time_t start; |
| 1270 | |
| 1271 | bufmem = isc_mem_get(dctx->mctx, initial_buffer_length); |
| 1272 | if (bufmem == NULL) |
| 1273 | return (ISC_R_NOMEMORY); |
| 1274 | |
| 1275 | isc_buffer_init(&buffer, bufmem, initial_buffer_length); |
| 1276 | |
| 1277 | dns_fixedname_init(&fixname); |
| 1278 | name = dns_fixedname_name(&fixname); |
| 1279 | |
| 1280 | if (dctx->first) { |
| 1281 | switch (dctx->format) { |
| 1282 | case dns_masterformat_text: |
| 1283 | /* |
| 1284 | * If the database has cache semantics, output an |
| 1285 | * RFC2540 $DATE directive so that the TTLs can be |
| 1286 | * adjusted when it is reloaded. For zones it is not |
| 1287 | * really needed, and it would make the file |
| 1288 | * incompatible with pre-RFC2540 software, so we omit |
| 1289 | * it in the zone case. |
| 1290 | */ |
| 1291 | if (dctx->do_date) { |
| 1292 | result = dns_time32_totext(dctx->now, &buffer); |
| 1293 | RUNTIME_CHECK(result == ISC_R_SUCCESS); |
| 1294 | isc_buffer_usedregion(&buffer, &r); |
| 1295 | fprintf(dctx->f, "$DATE %.*s\n", |
| 1296 | (int) r.length, (char *) r.base); |
| 1297 | } |
| 1298 | break; |
| 1299 | case dns_masterformat_raw: |
| 1300 | r.base = (unsigned char *)&rawheader; |
| 1301 | r.length = sizeof(rawheader); |
| 1302 | isc_buffer_region(&buffer, &r); |
| 1303 | isc_buffer_putuint32(&buffer, dns_masterformat_raw); |
| 1304 | isc_buffer_putuint32(&buffer, DNS_RAWFORMAT_VERSION); |
| 1305 | if (sizeof(now32) != sizeof(dctx->now)) { |
| 1306 | /* |
| 1307 | * We assume isc_stdtime_t is a 32-bit integer, |
| 1308 | * which should be the case on most cases. |
| 1309 | * If it turns out to be uncommon, we'll need |
| 1310 | * to bump the version number and revise the |
| 1311 | * header format. |
| 1312 | */ |
| 1313 | isc_log_write(dns_lctx, |
| 1314 | ISC_LOGCATEGORY_GENERAL, |
| 1315 | DNS_LOGMODULE_MASTERDUMP, |
| 1316 | ISC_LOG_INFO, |
| 1317 | "dumping master file in raw " |
| 1318 | "format: stdtime is not 32bits"); |
| 1319 | now32 = 0; |
| 1320 | } else |
| 1321 | now32 = dctx->now; |
| 1322 | isc_buffer_putuint32(&buffer, now32); |
| 1323 | INSIST(isc_buffer_usedlength(&buffer) <= |
| 1324 | sizeof(rawheader)); |
| 1325 | result = isc_stdio_write(buffer.base, 1, |
| 1326 | isc_buffer_usedlength(&buffer), |
| 1327 | dctx->f, NULL); |
| 1328 | if (result != ISC_R_SUCCESS) |
| 1329 | return (result); |
| 1330 | isc_buffer_clear(&buffer); |
| 1331 | break; |
| 1332 | default: |
| 1333 | INSIST(0); |
| 1334 | } |
| 1335 | |
| 1336 | result = dns_dbiterator_first(dctx->dbiter); |
| 1337 | dctx->first = ISC_FALSE; |
| 1338 | } else |
| 1339 | result = ISC_R_SUCCESS; |
| 1340 | |
| 1341 | nodes = dctx->nodes; |
| 1342 | isc_time_now(&start); |
| 1343 | while (result == ISC_R_SUCCESS && (dctx->nodes == 0 || nodes--)) { |
| 1344 | dns_rdatasetiter_t *rdsiter = NULL; |
| 1345 | dns_dbnode_t *node = NULL; |
| 1346 | |
| 1347 | result = dns_dbiterator_current(dctx->dbiter, &node, name); |
| 1348 | if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) |
| 1349 | break; |
| 1350 | if (result == DNS_R_NEWORIGIN) { |
| 1351 | dns_name_t *origin = |
| 1352 | dns_fixedname_name(&dctx->tctx.origin_fixname); |
| 1353 | result = dns_dbiterator_origin(dctx->dbiter, origin); |
| 1354 | RUNTIME_CHECK(result == ISC_R_SUCCESS); |
| 1355 | if ((dctx->tctx.style.flags & DNS_STYLEFLAG_REL_DATA) != 0) |
| 1356 | dctx->tctx.origin = origin; |
| 1357 | dctx->tctx.neworigin = origin; |
| 1358 | } |
| 1359 | result = dns_db_allrdatasets(dctx->db, node, dctx->version, |
| 1360 | dctx->now, &rdsiter); |
| 1361 | if (result != ISC_R_SUCCESS) { |
| 1362 | dns_db_detachnode(dctx->db, &node); |
| 1363 | goto fail; |
| 1364 | } |
| 1365 | result = (dctx->dumpsets)(dctx->mctx, name, rdsiter, |
| 1366 | &dctx->tctx, &buffer, dctx->f); |
| 1367 | dns_rdatasetiter_destroy(&rdsiter); |
| 1368 | if (result != ISC_R_SUCCESS) { |
| 1369 | dns_db_detachnode(dctx->db, &node); |
| 1370 | goto fail; |
| 1371 | } |
| 1372 | dns_db_detachnode(dctx->db, &node); |
| 1373 | result = dns_dbiterator_next(dctx->dbiter); |
| 1374 | } |
| 1375 | |
| 1376 | /* |
| 1377 | * Work out how many nodes can be written in the time between |
| 1378 | * two requests to the nameserver. Smooth the resulting number and |
| 1379 | * use it as a estimate for the number of nodes to be written in the |
| 1380 | * next iteration. |
| 1381 | */ |
| 1382 | if (dctx->nodes != 0 && result == ISC_R_SUCCESS) { |
| 1383 | unsigned int pps = dns_pps; /* packets per second */ |
| 1384 | unsigned int interval; |
| 1385 | isc_uint64_t usecs; |
| 1386 | isc_time_t end; |
| 1387 | |
| 1388 | isc_time_now(&end); |
| 1389 | if (pps < 100) |
| 1390 | pps = 100; |
| 1391 | interval = 1000000 / pps; /* interval in usecs */ |
| 1392 | if (interval == 0) |
| 1393 | interval = 1; |
| 1394 | usecs = isc_time_microdiff(&end, &start); |
| 1395 | if (usecs == 0) { |
| 1396 | dctx->nodes = dctx->nodes * 2; |
| 1397 | if (dctx->nodes > 1000) |
| 1398 | dctx->nodes = 1000; |
| 1399 | } else { |
| 1400 | nodes = dctx->nodes * interval; |
| 1401 | nodes /= (unsigned int)usecs; |
| 1402 | if (nodes == 0) |
| 1403 | nodes = 1; |
| 1404 | else if (nodes > 1000) |
| 1405 | nodes = 1000; |
| 1406 | |
| 1407 | /* Smooth and assign. */ |
| 1408 | dctx->nodes = (nodes + dctx->nodes * 7) / 8; |
| 1409 | |
| 1410 | isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, |
| 1411 | DNS_LOGMODULE_MASTERDUMP, |
| 1412 | ISC_LOG_DEBUG(1), |
| 1413 | "dumptostreaminc(%p) new nodes -> %d\n", |
| 1414 | dctx, dctx->nodes); |
| 1415 | } |
| 1416 | result = DNS_R_CONTINUE; |
| 1417 | } else if (result == ISC_R_NOMORE) |
| 1418 | result = ISC_R_SUCCESS; |
| 1419 | fail: |
| 1420 | RUNTIME_CHECK(dns_dbiterator_pause(dctx->dbiter) == ISC_R_SUCCESS); |
| 1421 | isc_mem_put(dctx->mctx, buffer.base, buffer.length); |
| 1422 | return (result); |
| 1423 | } |
| 1424 | |
| 1425 | isc_result_t |
| 1426 | dns_master_dumptostreaminc(isc_mem_t *mctx, dns_db_t *db, |
| 1427 | dns_dbversion_t *version, |
| 1428 | const dns_master_style_t *style, |
| 1429 | FILE *f, isc_task_t *task, |
| 1430 | dns_dumpdonefunc_t done, void *done_arg, |
| 1431 | dns_dumpctx_t **dctxp) |
| 1432 | { |
| 1433 | dns_dumpctx_t *dctx = NULL; |
| 1434 | isc_result_t result; |
| 1435 | |
| 1436 | REQUIRE(task != NULL); |
| 1437 | REQUIRE(f != NULL); |
| 1438 | REQUIRE(done != NULL); |
| 1439 | |
| 1440 | result = dumpctx_create(mctx, db, version, style, f, &dctx, |
| 1441 | dns_masterformat_text); |
| 1442 | if (result != ISC_R_SUCCESS) |
| 1443 | return (result); |
| 1444 | isc_task_attach(task, &dctx->task); |
| 1445 | dctx->done = done; |
| 1446 | dctx->done_arg = done_arg; |
| 1447 | dctx->nodes = 100; |
| 1448 | |
| 1449 | result = task_send(dctx); |
| 1450 | if (result == ISC_R_SUCCESS) { |
| 1451 | dns_dumpctx_attach(dctx, dctxp); |
| 1452 | return (DNS_R_CONTINUE); |
| 1453 | } |
| 1454 | |
| 1455 | dns_dumpctx_detach(&dctx); |
| 1456 | return (result); |
| 1457 | } |
| 1458 | |
| 1459 | /* |
| 1460 | * Dump an entire database into a master file. |
| 1461 | */ |
| 1462 | isc_result_t |
| 1463 | dns_master_dumptostream(isc_mem_t *mctx, dns_db_t *db, |
| 1464 | dns_dbversion_t *version, |
| 1465 | const dns_master_style_t *style, |
| 1466 | FILE *f) |
| 1467 | { |
| 1468 | return (dns_master_dumptostream2(mctx, db, version, style, |
| 1469 | dns_masterformat_text, f)); |
| 1470 | } |
| 1471 | |
| 1472 | isc_result_t |
| 1473 | dns_master_dumptostream2(isc_mem_t *mctx, dns_db_t *db, |
| 1474 | dns_dbversion_t *version, |
| 1475 | const dns_master_style_t *style, |
| 1476 | dns_masterformat_t format, FILE *f) |
| 1477 | { |
| 1478 | dns_dumpctx_t *dctx = NULL; |
| 1479 | isc_result_t result; |
| 1480 | |
| 1481 | result = dumpctx_create(mctx, db, version, style, f, &dctx, format); |
| 1482 | if (result != ISC_R_SUCCESS) |
| 1483 | return (result); |
| 1484 | |
| 1485 | result = dumptostreaminc(dctx); |
| 1486 | INSIST(result != DNS_R_CONTINUE); |
| 1487 | dns_dumpctx_detach(&dctx); |
| 1488 | return (result); |
| 1489 | } |
| 1490 | |
| 1491 | static isc_result_t |
| 1492 | opentmp(isc_mem_t *mctx, const char *file, char **tempp, FILE **fp) { |
| 1493 | FILE *f = NULL; |
| 1494 | isc_result_t result; |
| 1495 | char *tempname = NULL; |
| 1496 | int tempnamelen; |
| 1497 | |
| 1498 | tempnamelen = strlen(file) + 20; |
| 1499 | tempname = isc_mem_allocate(mctx, tempnamelen); |
| 1500 | if (tempname == NULL) |
| 1501 | return (ISC_R_NOMEMORY); |
| 1502 | |
| 1503 | result = isc_file_mktemplate(file, tempname, tempnamelen); |
| 1504 | if (result != ISC_R_SUCCESS) |
| 1505 | goto cleanup; |
| 1506 | |
| 1507 | result = isc_file_openunique(tempname, &f); |
| 1508 | if (result != ISC_R_SUCCESS) { |
| 1509 | isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, |
| 1510 | DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, |
| 1511 | "dumping master file: %s: open: %s", |
| 1512 | tempname, isc_result_totext(result)); |
| 1513 | goto cleanup; |
| 1514 | } |
| 1515 | *tempp = tempname; |
| 1516 | *fp = f; |
| 1517 | return (ISC_R_SUCCESS); |
| 1518 | |
| 1519 | cleanup: |
| 1520 | isc_mem_free(mctx, tempname); |
| 1521 | return (result); |
| 1522 | } |
| 1523 | |
| 1524 | isc_result_t |
| 1525 | dns_master_dumpinc(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, |
| 1526 | const dns_master_style_t *style, const char *filename, |
| 1527 | isc_task_t *task, dns_dumpdonefunc_t done, void *done_arg, |
| 1528 | dns_dumpctx_t **dctxp) |
| 1529 | { |
| 1530 | return (dns_master_dumpinc2(mctx, db, version, style, filename, task, |
| 1531 | done, done_arg, dctxp, |
| 1532 | dns_masterformat_text)); |
| 1533 | } |
| 1534 | |
| 1535 | isc_result_t |
| 1536 | dns_master_dumpinc2(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, |
| 1537 | const dns_master_style_t *style, const char *filename, |
| 1538 | isc_task_t *task, dns_dumpdonefunc_t done, void *done_arg, |
| 1539 | dns_dumpctx_t **dctxp, dns_masterformat_t format) |
| 1540 | { |
| 1541 | FILE *f = NULL; |
| 1542 | isc_result_t result; |
| 1543 | char *tempname = NULL; |
| 1544 | char *file = NULL; |
| 1545 | dns_dumpctx_t *dctx = NULL; |
| 1546 | |
| 1547 | file = isc_mem_strdup(mctx, filename); |
| 1548 | if (file == NULL) |
| 1549 | return (ISC_R_NOMEMORY); |
| 1550 | |
| 1551 | result = opentmp(mctx, filename, &tempname, &f); |
| 1552 | if (result != ISC_R_SUCCESS) |
| 1553 | goto cleanup; |
| 1554 | |
| 1555 | result = dumpctx_create(mctx, db, version, style, f, &dctx, format); |
| 1556 | if (result != ISC_R_SUCCESS) { |
| 1557 | (void)isc_stdio_close(f); |
| 1558 | (void)isc_file_remove(tempname); |
| 1559 | goto cleanup; |
| 1560 | } |
| 1561 | |
| 1562 | isc_task_attach(task, &dctx->task); |
| 1563 | dctx->done = done; |
| 1564 | dctx->done_arg = done_arg; |
| 1565 | dctx->nodes = 100; |
| 1566 | dctx->file = file; |
| 1567 | file = NULL; |
| 1568 | dctx->tmpfile = tempname; |
| 1569 | tempname = NULL; |
| 1570 | |
| 1571 | result = task_send(dctx); |
| 1572 | if (result == ISC_R_SUCCESS) { |
| 1573 | dns_dumpctx_attach(dctx, dctxp); |
| 1574 | return (DNS_R_CONTINUE); |
| 1575 | } |
| 1576 | |
| 1577 | cleanup: |
| 1578 | if (dctx != NULL) |
| 1579 | dns_dumpctx_detach(&dctx); |
| 1580 | if (file != NULL) |
| 1581 | isc_mem_free(mctx, file); |
| 1582 | if (tempname != NULL) |
| 1583 | isc_mem_free(mctx, tempname); |
| 1584 | return (result); |
| 1585 | } |
| 1586 | |
| 1587 | isc_result_t |
| 1588 | dns_master_dump(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, |
| 1589 | const dns_master_style_t *style, const char *filename) |
| 1590 | { |
| 1591 | return (dns_master_dump2(mctx, db, version, style, filename, |
| 1592 | dns_masterformat_text)); |
| 1593 | } |
| 1594 | |
| 1595 | isc_result_t |
| 1596 | dns_master_dump2(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, |
| 1597 | const dns_master_style_t *style, const char *filename, |
| 1598 | dns_masterformat_t format) |
| 1599 | { |
| 1600 | FILE *f = NULL; |
| 1601 | isc_result_t result; |
| 1602 | char *tempname; |
| 1603 | dns_dumpctx_t *dctx = NULL; |
| 1604 | |
| 1605 | result = opentmp(mctx, filename, &tempname, &f); |
| 1606 | if (result != ISC_R_SUCCESS) |
| 1607 | return (result); |
| 1608 | |
| 1609 | result = dumpctx_create(mctx, db, version, style, f, &dctx, format); |
| 1610 | if (result != ISC_R_SUCCESS) |
| 1611 | goto cleanup; |
| 1612 | |
| 1613 | result = dumptostreaminc(dctx); |
| 1614 | INSIST(result != DNS_R_CONTINUE); |
| 1615 | dns_dumpctx_detach(&dctx); |
| 1616 | |
| 1617 | result = closeandrename(f, result, tempname, filename); |
| 1618 | |
| 1619 | cleanup: |
| 1620 | isc_mem_free(mctx, tempname); |
| 1621 | return (result); |
| 1622 | } |
| 1623 | |
| 1624 | /* |
| 1625 | * Dump a database node into a master file. |
| 1626 | * XXX: this function assumes the text format. |
| 1627 | */ |
| 1628 | isc_result_t |
| 1629 | dns_master_dumpnodetostream(isc_mem_t *mctx, dns_db_t *db, |
| 1630 | dns_dbversion_t *version, |
| 1631 | dns_dbnode_t *node, dns_name_t *name, |
| 1632 | const dns_master_style_t *style, |
| 1633 | FILE *f) |
| 1634 | { |
| 1635 | isc_result_t result; |
| 1636 | isc_buffer_t buffer; |
| 1637 | char *bufmem; |
| 1638 | isc_stdtime_t now; |
| 1639 | dns_totext_ctx_t ctx; |
| 1640 | dns_rdatasetiter_t *rdsiter = NULL; |
| 1641 | |
| 1642 | result = totext_ctx_init(style, &ctx); |
| 1643 | if (result != ISC_R_SUCCESS) { |
| 1644 | UNEXPECTED_ERROR(__FILE__, __LINE__, |
| 1645 | "could not set master file style"); |
| 1646 | return (ISC_R_UNEXPECTED); |
| 1647 | } |
| 1648 | |
| 1649 | isc_stdtime_get(&now); |
| 1650 | |
| 1651 | bufmem = isc_mem_get(mctx, initial_buffer_length); |
| 1652 | if (bufmem == NULL) |
| 1653 | return (ISC_R_NOMEMORY); |
| 1654 | |
| 1655 | isc_buffer_init(&buffer, bufmem, initial_buffer_length); |
| 1656 | |
| 1657 | result = dns_db_allrdatasets(db, node, version, now, &rdsiter); |
| 1658 | if (result != ISC_R_SUCCESS) |
| 1659 | goto failure; |
| 1660 | result = dump_rdatasets_text(mctx, name, rdsiter, &ctx, &buffer, f); |
| 1661 | if (result != ISC_R_SUCCESS) |
| 1662 | goto failure; |
| 1663 | dns_rdatasetiter_destroy(&rdsiter); |
| 1664 | |
| 1665 | result = ISC_R_SUCCESS; |
| 1666 | |
| 1667 | failure: |
| 1668 | isc_mem_put(mctx, buffer.base, buffer.length); |
| 1669 | return (result); |
| 1670 | } |
| 1671 | |
| 1672 | isc_result_t |
| 1673 | dns_master_dumpnode(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, |
| 1674 | dns_dbnode_t *node, dns_name_t *name, |
| 1675 | const dns_master_style_t *style, const char *filename) |
| 1676 | { |
| 1677 | FILE *f = NULL; |
| 1678 | isc_result_t result; |
| 1679 | |
| 1680 | result = isc_stdio_open(filename, "w", &f); |
| 1681 | if (result != ISC_R_SUCCESS) { |
| 1682 | isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, |
| 1683 | DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, |
| 1684 | "dumping node to file: %s: open: %s", filename, |
| 1685 | isc_result_totext(result)); |
| 1686 | return (ISC_R_UNEXPECTED); |
| 1687 | } |
| 1688 | |
| 1689 | result = dns_master_dumpnodetostream(mctx, db, version, node, name, |
| 1690 | style, f); |
| 1691 | |
| 1692 | result = isc_stdio_close(f); |
| 1693 | if (result != ISC_R_SUCCESS) { |
| 1694 | isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, |
| 1695 | DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, |
| 1696 | "dumping master file: %s: close: %s", filename, |
| 1697 | isc_result_totext(result)); |
| 1698 | return (ISC_R_UNEXPECTED); |
| 1699 | } |
| 1700 | |
| 1701 | return (result); |
| 1702 | } |
| 1703 | |
| 1704 | isc_result_t |
| 1705 | dns_master_stylecreate(dns_master_style_t **stylep, unsigned int flags, |
| 1706 | unsigned int ttl_column, unsigned int class_column, |
| 1707 | unsigned int type_column, unsigned int rdata_column, |
| 1708 | unsigned int line_length, unsigned int tab_width, |
| 1709 | isc_mem_t *mctx) |
| 1710 | { |
| 1711 | dns_master_style_t *style; |
| 1712 | |
| 1713 | REQUIRE(stylep != NULL && *stylep == NULL); |
| 1714 | style = isc_mem_get(mctx, sizeof(*style)); |
| 1715 | if (style == NULL) |
| 1716 | return (ISC_R_NOMEMORY); |
| 1717 | |
| 1718 | style->flags = flags; |
| 1719 | style->ttl_column = ttl_column; |
| 1720 | style->class_column = class_column; |
| 1721 | style->type_column = type_column; |
| 1722 | style->rdata_column = rdata_column; |
| 1723 | style->line_length = line_length; |
| 1724 | style->tab_width = tab_width; |
| 1725 | |
| 1726 | *stylep = style; |
| 1727 | return (ISC_R_SUCCESS); |
| 1728 | } |
| 1729 | |
| 1730 | void |
| 1731 | dns_master_styledestroy(dns_master_style_t **stylep, isc_mem_t *mctx) { |
| 1732 | dns_master_style_t *style; |
| 1733 | |
| 1734 | REQUIRE(stylep != NULL && *stylep != NULL); |
| 1735 | style = *stylep; |
| 1736 | *stylep = NULL; |
| 1737 | isc_mem_put(mctx, style, sizeof(*style)); |
| 1738 | } |