diff options
Diffstat (limited to 'contrib/bind9/lib/dns/masterdump.c')
| -rw-r--r-- | contrib/bind9/lib/dns/masterdump.c | 1803 |
1 files changed, 1803 insertions, 0 deletions
diff --git a/contrib/bind9/lib/dns/masterdump.c b/contrib/bind9/lib/dns/masterdump.c new file mode 100644 index 000000000000..0c17c1af235d --- /dev/null +++ b/contrib/bind9/lib/dns/masterdump.c @@ -0,0 +1,1803 @@ +/* + * Copyright (C) 2004-2009, 2011, 2012 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 1999-2003 Internet Software Consortium. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, + * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +/* $Id$ */ + +/*! \file */ + +#include <config.h> + +#include <stdlib.h> + +#include <isc/event.h> +#include <isc/file.h> +#include <isc/magic.h> +#include <isc/mem.h> +#include <isc/print.h> +#include <isc/stdio.h> +#include <isc/string.h> +#include <isc/task.h> +#include <isc/time.h> +#include <isc/util.h> + +#include <dns/db.h> +#include <dns/dbiterator.h> +#include <dns/events.h> +#include <dns/fixedname.h> +#include <dns/lib.h> +#include <dns/log.h> +#include <dns/master.h> +#include <dns/masterdump.h> +#include <dns/ncache.h> +#include <dns/rdata.h> +#include <dns/rdataclass.h> +#include <dns/rdataset.h> +#include <dns/rdatasetiter.h> +#include <dns/rdatatype.h> +#include <dns/result.h> +#include <dns/time.h> +#include <dns/ttl.h> + +#define DNS_DCTX_MAGIC ISC_MAGIC('D', 'c', 't', 'x') +#define DNS_DCTX_VALID(d) ISC_MAGIC_VALID(d, DNS_DCTX_MAGIC) + +#define RETERR(x) do { \ + isc_result_t _r = (x); \ + if (_r != ISC_R_SUCCESS) \ + return (_r); \ + } while (0) + +#define CHECK(x) do { \ + if ((x) != ISC_R_SUCCESS) \ + goto cleanup; \ + } while (0) + +struct dns_master_style { + unsigned int flags; /* DNS_STYLEFLAG_* */ + unsigned int ttl_column; + unsigned int class_column; + unsigned int type_column; + unsigned int rdata_column; + unsigned int line_length; + unsigned int tab_width; +}; + +/*% + * The maximum length of the newline+indentation that is output + * when inserting a line break in an RR. This effectively puts an + * upper limits on the value of "rdata_column", because if it is + * very large, the tabs and spaces needed to reach it will not fit. + */ +#define DNS_TOTEXT_LINEBREAK_MAXLEN 100 + +/*% + * Context structure for a masterfile dump in progress. + */ +typedef struct dns_totext_ctx { + dns_master_style_t style; + isc_boolean_t class_printed; + char * linebreak; + char linebreak_buf[DNS_TOTEXT_LINEBREAK_MAXLEN]; + dns_name_t * origin; + dns_name_t * neworigin; + dns_fixedname_t origin_fixname; + isc_uint32_t current_ttl; + isc_boolean_t current_ttl_valid; +} dns_totext_ctx_t; + +LIBDNS_EXTERNAL_DATA const dns_master_style_t +dns_master_style_default = { + DNS_STYLEFLAG_OMIT_OWNER | + DNS_STYLEFLAG_OMIT_CLASS | + DNS_STYLEFLAG_REL_OWNER | + DNS_STYLEFLAG_REL_DATA | + DNS_STYLEFLAG_OMIT_TTL | + DNS_STYLEFLAG_TTL | + DNS_STYLEFLAG_COMMENT | + DNS_STYLEFLAG_MULTILINE, + 24, 24, 24, 32, 80, 8 +}; + +LIBDNS_EXTERNAL_DATA const dns_master_style_t +dns_master_style_full = { + DNS_STYLEFLAG_COMMENT | + DNS_STYLEFLAG_RESIGN, + 46, 46, 46, 64, 120, 8 +}; + +LIBDNS_EXTERNAL_DATA const dns_master_style_t +dns_master_style_explicitttl = { + DNS_STYLEFLAG_OMIT_OWNER | + DNS_STYLEFLAG_OMIT_CLASS | + DNS_STYLEFLAG_REL_OWNER | + DNS_STYLEFLAG_REL_DATA | + DNS_STYLEFLAG_COMMENT | + DNS_STYLEFLAG_MULTILINE, + 24, 32, 32, 40, 80, 8 +}; + +LIBDNS_EXTERNAL_DATA const dns_master_style_t +dns_master_style_cache = { + DNS_STYLEFLAG_OMIT_OWNER | + DNS_STYLEFLAG_OMIT_CLASS | + DNS_STYLEFLAG_MULTILINE | + DNS_STYLEFLAG_TRUST | + DNS_STYLEFLAG_NCACHE, + 24, 32, 32, 40, 80, 8 +}; + +LIBDNS_EXTERNAL_DATA const dns_master_style_t +dns_master_style_simple = { + 0, + 24, 32, 32, 40, 80, 8 +}; + +/*% + * A style suitable for dns_rdataset_totext(). + */ +LIBDNS_EXTERNAL_DATA const dns_master_style_t +dns_master_style_debug = { + DNS_STYLEFLAG_REL_OWNER, + 24, 32, 40, 48, 80, 8 +}; + + +#define N_SPACES 10 +static char spaces[N_SPACES+1] = " "; + +#define N_TABS 10 +static char tabs[N_TABS+1] = "\t\t\t\t\t\t\t\t\t\t"; + +#ifdef BIND9 +struct dns_dumpctx { + unsigned int magic; + isc_mem_t *mctx; + isc_mutex_t lock; + unsigned int references; + isc_boolean_t canceled; + isc_boolean_t first; + isc_boolean_t do_date; + isc_stdtime_t now; + FILE *f; + dns_db_t *db; + dns_dbversion_t *version; + dns_dbiterator_t *dbiter; + dns_totext_ctx_t tctx; + isc_task_t *task; + dns_dumpdonefunc_t done; + void *done_arg; + unsigned int nodes; + /* dns_master_dumpinc() */ + char *file; + char *tmpfile; + dns_masterformat_t format; + isc_result_t (*dumpsets)(isc_mem_t *mctx, dns_name_t *name, + dns_rdatasetiter_t *rdsiter, + dns_totext_ctx_t *ctx, + isc_buffer_t *buffer, FILE *f); +}; +#endif /* BIND9 */ + +#define NXDOMAIN(x) (((x)->attributes & DNS_RDATASETATTR_NXDOMAIN) != 0) + +/*% + * Output tabs and spaces to go from column '*current' to + * column 'to', and update '*current' to reflect the new + * current column. + */ +static isc_result_t +indent(unsigned int *current, unsigned int to, int tabwidth, + isc_buffer_t *target) +{ + isc_region_t r; + unsigned char *p; + unsigned int from; + int ntabs, nspaces, t; + + from = *current; + + if (to < from + 1) + to = from + 1; + + ntabs = to / tabwidth - from / tabwidth; + if (ntabs < 0) + ntabs = 0; + + if (ntabs > 0) { + isc_buffer_availableregion(target, &r); + if (r.length < (unsigned) ntabs) + return (ISC_R_NOSPACE); + p = r.base; + + t = ntabs; + while (t) { + int n = t; + if (n > N_TABS) + n = N_TABS; + memcpy(p, tabs, n); + p += n; + t -= n; + } + isc_buffer_add(target, ntabs); + from = (to / tabwidth) * tabwidth; + } + + nspaces = to - from; + INSIST(nspaces >= 0); + + isc_buffer_availableregion(target, &r); + if (r.length < (unsigned) nspaces) + return (ISC_R_NOSPACE); + p = r.base; + + t = nspaces; + while (t) { + int n = t; + if (n > N_SPACES) + n = N_SPACES; + memcpy(p, spaces, n); + p += n; + t -= n; + } + isc_buffer_add(target, nspaces); + + *current = to; + return (ISC_R_SUCCESS); +} + +static isc_result_t +totext_ctx_init(const dns_master_style_t *style, dns_totext_ctx_t *ctx) { + isc_result_t result; + + REQUIRE(style->tab_width != 0); + + ctx->style = *style; + ctx->class_printed = ISC_FALSE; + + dns_fixedname_init(&ctx->origin_fixname); + + /* + * Set up the line break string if needed. + */ + if ((ctx->style.flags & DNS_STYLEFLAG_MULTILINE) != 0) { + isc_buffer_t buf; + isc_region_t r; + unsigned int col = 0; + + isc_buffer_init(&buf, ctx->linebreak_buf, + sizeof(ctx->linebreak_buf)); + + isc_buffer_availableregion(&buf, &r); + if (r.length < 1) + return (DNS_R_TEXTTOOLONG); + r.base[0] = '\n'; + isc_buffer_add(&buf, 1); + + result = indent(&col, ctx->style.rdata_column, + ctx->style.tab_width, &buf); + /* + * Do not return ISC_R_NOSPACE if the line break string + * buffer is too small, because that would just make + * dump_rdataset() retry indefinitely with ever + * bigger target buffers. That's a different buffer, + * so it won't help. Use DNS_R_TEXTTOOLONG as a substitute. + */ + if (result == ISC_R_NOSPACE) + return (DNS_R_TEXTTOOLONG); + if (result != ISC_R_SUCCESS) + return (result); + + isc_buffer_availableregion(&buf, &r); + if (r.length < 1) + return (DNS_R_TEXTTOOLONG); + r.base[0] = '\0'; + isc_buffer_add(&buf, 1); + ctx->linebreak = ctx->linebreak_buf; + } else { + ctx->linebreak = NULL; + } + + ctx->origin = NULL; + ctx->neworigin = NULL; + ctx->current_ttl = 0; + ctx->current_ttl_valid = ISC_FALSE; + + return (ISC_R_SUCCESS); +} + +#define INDENT_TO(col) \ + do { \ + if ((result = indent(&column, ctx->style.col, \ + ctx->style.tab_width, target)) \ + != ISC_R_SUCCESS) \ + return (result); \ + } while (0) + + +static isc_result_t +str_totext(const char *source, isc_buffer_t *target) { + unsigned int l; + isc_region_t region; + + isc_buffer_availableregion(target, ®ion); + l = strlen(source); + + if (l > region.length) + return (ISC_R_NOSPACE); + + memcpy(region.base, source, l); + isc_buffer_add(target, l); + return (ISC_R_SUCCESS); +} + +static isc_result_t +ncache_summary(dns_rdataset_t *rdataset, isc_boolean_t omit_final_dot, + isc_buffer_t *target) +{ + isc_result_t result = ISC_R_SUCCESS; + dns_rdataset_t rds; + dns_name_t name; + + dns_rdataset_init(&rds); + dns_name_init(&name, NULL); + + do { + dns_ncache_current(rdataset, &name, &rds); + for (result = dns_rdataset_first(&rds); + result == ISC_R_SUCCESS; + result = dns_rdataset_next(&rds)) { + CHECK(str_totext("; ", target)); + CHECK(dns_name_totext(&name, omit_final_dot, target)); + CHECK(str_totext(" ", target)); + CHECK(dns_rdatatype_totext(rds.type, target)); + if (rds.type == dns_rdatatype_rrsig) { + CHECK(str_totext(" ", target)); + CHECK(dns_rdatatype_totext(rds.covers, target)); + CHECK(str_totext(" ...\n", target)); + } else { + dns_rdata_t rdata = DNS_RDATA_INIT; + dns_rdataset_current(&rds, &rdata); + CHECK(str_totext(" ", target)); + CHECK(dns_rdata_tofmttext(&rdata, dns_rootname, + 0, 0, " ", target)); + CHECK(str_totext("\n", target)); + } + } + dns_rdataset_disassociate(&rds); + result = dns_rdataset_next(rdataset); + } while (result == ISC_R_SUCCESS); + + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + cleanup: + if (dns_rdataset_isassociated(&rds)) + dns_rdataset_disassociate(&rds); + + return (result); +} + +/* + * Convert 'rdataset' to master file text format according to 'ctx', + * storing the result in 'target'. If 'owner_name' is NULL, it + * is omitted; otherwise 'owner_name' must be valid and have at least + * one label. + */ + +static isc_result_t +rdataset_totext(dns_rdataset_t *rdataset, + dns_name_t *owner_name, + dns_totext_ctx_t *ctx, + isc_boolean_t omit_final_dot, + isc_buffer_t *target) +{ + isc_result_t result; + unsigned int column; + isc_boolean_t first = ISC_TRUE; + isc_uint32_t current_ttl; + isc_boolean_t current_ttl_valid; + dns_rdatatype_t type; + unsigned int type_start; + + REQUIRE(DNS_RDATASET_VALID(rdataset)); + + rdataset->attributes |= DNS_RDATASETATTR_LOADORDER; + result = dns_rdataset_first(rdataset); + + current_ttl = ctx->current_ttl; + current_ttl_valid = ctx->current_ttl_valid; + + while (result == ISC_R_SUCCESS) { + column = 0; + + /* + * Owner name. + */ + if (owner_name != NULL && + ! ((ctx->style.flags & DNS_STYLEFLAG_OMIT_OWNER) != 0 && + !first)) + { + unsigned int name_start = target->used; + RETERR(dns_name_totext(owner_name, + omit_final_dot, + target)); + column += target->used - name_start; + } + + /* + * TTL. + */ + if ((ctx->style.flags & DNS_STYLEFLAG_NO_TTL) == 0 && + !((ctx->style.flags & DNS_STYLEFLAG_OMIT_TTL) != 0 && + current_ttl_valid && + rdataset->ttl == current_ttl)) + { + char ttlbuf[64]; + isc_region_t r; + unsigned int length; + + INDENT_TO(ttl_column); + length = snprintf(ttlbuf, sizeof(ttlbuf), "%u", + rdataset->ttl); + INSIST(length <= sizeof(ttlbuf)); + isc_buffer_availableregion(target, &r); + if (r.length < length) + return (ISC_R_NOSPACE); + memcpy(r.base, ttlbuf, length); + isc_buffer_add(target, length); + column += length; + + /* + * If the $TTL directive is not in use, the TTL we + * just printed becomes the default for subsequent RRs. + */ + if ((ctx->style.flags & DNS_STYLEFLAG_TTL) == 0) { + current_ttl = rdataset->ttl; + current_ttl_valid = ISC_TRUE; + } + } + + /* + * Class. + */ + if ((ctx->style.flags & DNS_STYLEFLAG_NO_CLASS) == 0 && + ((ctx->style.flags & DNS_STYLEFLAG_OMIT_CLASS) == 0 || + ctx->class_printed == ISC_FALSE)) + { + unsigned int class_start; + INDENT_TO(class_column); + class_start = target->used; + result = dns_rdataclass_totext(rdataset->rdclass, + target); + if (result != ISC_R_SUCCESS) + return (result); + column += (target->used - class_start); + } + + /* + * Type. + */ + + if ((rdataset->attributes & DNS_RDATASETATTR_NEGATIVE) != 0) { + type = rdataset->covers; + } else { + type = rdataset->type; + } + + INDENT_TO(type_column); + type_start = target->used; + if ((rdataset->attributes & DNS_RDATASETATTR_NEGATIVE) != 0) + RETERR(str_totext("\\-", target)); + result = dns_rdatatype_totext(type, target); + if (result != ISC_R_SUCCESS) + return (result); + column += (target->used - type_start); + + /* + * Rdata. + */ + INDENT_TO(rdata_column); + if ((rdataset->attributes & DNS_RDATASETATTR_NEGATIVE) != 0) { + if (NXDOMAIN(rdataset)) + RETERR(str_totext(";-$NXDOMAIN\n", target)); + else + RETERR(str_totext(";-$NXRRSET\n", target)); + /* + * Print a summary of the cached records which make + * up the negative response. + */ + RETERR(ncache_summary(rdataset, omit_final_dot, + target)); + break; + } else { + dns_rdata_t rdata = DNS_RDATA_INIT; + isc_region_t r; + + dns_rdataset_current(rdataset, &rdata); + + RETERR(dns_rdata_tofmttext(&rdata, + ctx->origin, + ctx->style.flags, + ctx->style.line_length - + ctx->style.rdata_column, + ctx->linebreak, + target)); + + isc_buffer_availableregion(target, &r); + if (r.length < 1) + return (ISC_R_NOSPACE); + r.base[0] = '\n'; + isc_buffer_add(target, 1); + } + + first = ISC_FALSE; + result = dns_rdataset_next(rdataset); + } + + if (result != ISC_R_NOMORE) + return (result); + + /* + * Update the ctx state to reflect what we just printed. + * This is done last, only when we are sure we will return + * success, because this function may be called multiple + * times with increasing buffer sizes until it succeeds, + * and failed attempts must not update the state prematurely. + */ + ctx->class_printed = ISC_TRUE; + ctx->current_ttl= current_ttl; + ctx->current_ttl_valid = current_ttl_valid; + + return (ISC_R_SUCCESS); +} + +/* + * Print the name, type, and class of an empty rdataset, + * such as those used to represent the question section + * of a DNS message. + */ +static isc_result_t +question_totext(dns_rdataset_t *rdataset, + dns_name_t *owner_name, + dns_totext_ctx_t *ctx, + isc_boolean_t omit_final_dot, + isc_buffer_t *target) +{ + unsigned int column; + isc_result_t result; + isc_region_t r; + + REQUIRE(DNS_RDATASET_VALID(rdataset)); + result = dns_rdataset_first(rdataset); + REQUIRE(result == ISC_R_NOMORE); + + column = 0; + + /* Owner name */ + { + unsigned int name_start = target->used; + RETERR(dns_name_totext(owner_name, + omit_final_dot, + target)); + column += target->used - name_start; + } + + /* Class */ + { + unsigned int class_start; + INDENT_TO(class_column); + class_start = target->used; + result = dns_rdataclass_totext(rdataset->rdclass, target); + if (result != ISC_R_SUCCESS) + return (result); + column += (target->used - class_start); + } + + /* Type */ + { + unsigned int type_start; + INDENT_TO(type_column); + type_start = target->used; + result = dns_rdatatype_totext(rdataset->type, target); + if (result != ISC_R_SUCCESS) + return (result); + column += (target->used - type_start); + } + + isc_buffer_availableregion(target, &r); + if (r.length < 1) + return (ISC_R_NOSPACE); + r.base[0] = '\n'; + isc_buffer_add(target, 1); + + return (ISC_R_SUCCESS); +} + +isc_result_t +dns_rdataset_totext(dns_rdataset_t *rdataset, + dns_name_t *owner_name, + isc_boolean_t omit_final_dot, + isc_boolean_t question, + isc_buffer_t *target) +{ + dns_totext_ctx_t ctx; + isc_result_t result; + result = totext_ctx_init(&dns_master_style_debug, &ctx); + if (result != ISC_R_SUCCESS) { + UNEXPECTED_ERROR(__FILE__, __LINE__, + "could not set master file style"); + return (ISC_R_UNEXPECTED); + } + + /* + * The caller might want to give us an empty owner + * name (e.g. if they are outputting into a master + * file and this rdataset has the same name as the + * previous one.) + */ + if (dns_name_countlabels(owner_name) == 0) + owner_name = NULL; + + if (question) + return (question_totext(rdataset, owner_name, &ctx, + omit_final_dot, target)); + else + return (rdataset_totext(rdataset, owner_name, &ctx, + omit_final_dot, target)); +} + +isc_result_t +dns_master_rdatasettotext(dns_name_t *owner_name, + dns_rdataset_t *rdataset, + const dns_master_style_t *style, + isc_buffer_t *target) +{ + dns_totext_ctx_t ctx; + isc_result_t result; + result = totext_ctx_init(style, &ctx); + if (result != ISC_R_SUCCESS) { + UNEXPECTED_ERROR(__FILE__, __LINE__, + "could not set master file style"); + return (ISC_R_UNEXPECTED); + } + + return (rdataset_totext(rdataset, owner_name, &ctx, + ISC_FALSE, target)); +} + +isc_result_t +dns_master_questiontotext(dns_name_t *owner_name, + dns_rdataset_t *rdataset, + const dns_master_style_t *style, + isc_buffer_t *target) +{ + dns_totext_ctx_t ctx; + isc_result_t result; + result = totext_ctx_init(style, &ctx); + if (result != ISC_R_SUCCESS) { + UNEXPECTED_ERROR(__FILE__, __LINE__, + "could not set master file style"); + return (ISC_R_UNEXPECTED); + } + + return (question_totext(rdataset, owner_name, &ctx, + ISC_FALSE, target)); +} + +#ifdef BIND9 +/* + * Print an rdataset. 'buffer' is a scratch buffer, which must have been + * dynamically allocated by the caller. It must be large enough to + * hold the result from dns_ttl_totext(). If more than that is needed, + * the buffer will be grown automatically. + */ + +static isc_result_t +dump_rdataset(isc_mem_t *mctx, dns_name_t *name, dns_rdataset_t *rdataset, + dns_totext_ctx_t *ctx, + isc_buffer_t *buffer, FILE *f) +{ + isc_region_t r; + isc_result_t result; + + REQUIRE(buffer->length > 0); + + /* + * Output a $TTL directive if needed. + */ + + if ((ctx->style.flags & DNS_STYLEFLAG_TTL) != 0) { + if (ctx->current_ttl_valid == ISC_FALSE || + ctx->current_ttl != rdataset->ttl) + { + if ((ctx->style.flags & DNS_STYLEFLAG_COMMENT) != 0) + { + isc_buffer_clear(buffer); + result = dns_ttl_totext(rdataset->ttl, + ISC_TRUE, buffer); + INSIST(result == ISC_R_SUCCESS); + isc_buffer_usedregion(buffer, &r); + fprintf(f, "$TTL %u\t; %.*s\n", rdataset->ttl, + (int) r.length, (char *) r.base); + } else { + fprintf(f, "$TTL %u\n", rdataset->ttl); + } + ctx->current_ttl = rdataset->ttl; + ctx->current_ttl_valid = ISC_TRUE; + } + } + + isc_buffer_clear(buffer); + + /* + * Generate the text representation of the rdataset into + * the buffer. If the buffer is too small, grow it. + */ + for (;;) { + int newlength; + void *newmem; + result = rdataset_totext(rdataset, name, ctx, + ISC_FALSE, buffer); + if (result != ISC_R_NOSPACE) + break; + + newlength = buffer->length * 2; + newmem = isc_mem_get(mctx, newlength); + if (newmem == NULL) + return (ISC_R_NOMEMORY); + isc_mem_put(mctx, buffer->base, buffer->length); + isc_buffer_init(buffer, newmem, newlength); + } + if (result != ISC_R_SUCCESS) + return (result); + + /* + * Write the buffer contents to the master file. + */ + isc_buffer_usedregion(buffer, &r); + result = isc_stdio_write(r.base, 1, (size_t)r.length, f, NULL); + + if (result != ISC_R_SUCCESS) { + UNEXPECTED_ERROR(__FILE__, __LINE__, + "master file write failed: %s", + isc_result_totext(result)); + return (result); + } + + return (ISC_R_SUCCESS); +} + +/* + * Define the order in which rdatasets should be printed in zone + * files. We will print SOA and NS records before others, SIGs + * immediately following the things they sign, and order everything + * else by RR number. This is all just for aesthetics and + * compatibility with buggy software that expects the SOA to be first; + * the DNS specifications allow any order. + */ + +static int +dump_order(const dns_rdataset_t *rds) { + int t; + int sig; + if (rds->type == dns_rdatatype_rrsig) { + t = rds->covers; + sig = 1; + } else { + t = rds->type; + sig = 0; + } + switch (t) { + case dns_rdatatype_soa: + t = 0; + break; + case dns_rdatatype_ns: + t = 1; + break; + default: + t += 2; + break; + } + return (t << 1) + sig; +} + +static int +dump_order_compare(const void *a, const void *b) { + return (dump_order(*((const dns_rdataset_t * const *) a)) - + dump_order(*((const dns_rdataset_t * const *) b))); +} + +/* + * Dump all the rdatasets of a domain name to a master file. We make + * a "best effort" attempt to sort the RRsets in a nice order, but if + * there are more than MAXSORT RRsets, we punt and only sort them in + * groups of MAXSORT. This is not expected to ever happen in practice + * since much less than 64 RR types have been registered with the + * IANA, so far, and the output will be correct (though not + * aesthetically pleasing) even if it does happen. + */ + +#define MAXSORT 64 + +static isc_result_t +dump_rdatasets_text(isc_mem_t *mctx, dns_name_t *name, + dns_rdatasetiter_t *rdsiter, dns_totext_ctx_t *ctx, + isc_buffer_t *buffer, FILE *f) +{ + isc_result_t itresult, dumpresult; + isc_region_t r; + dns_rdataset_t rdatasets[MAXSORT]; + dns_rdataset_t *sorted[MAXSORT]; + int i, n; + + itresult = dns_rdatasetiter_first(rdsiter); + dumpresult = ISC_R_SUCCESS; + + if (itresult == ISC_R_SUCCESS && ctx->neworigin != NULL) { + isc_buffer_clear(buffer); + itresult = dns_name_totext(ctx->neworigin, ISC_FALSE, buffer); + RUNTIME_CHECK(itresult == ISC_R_SUCCESS); + isc_buffer_usedregion(buffer, &r); + fprintf(f, "$ORIGIN %.*s\n", (int) r.length, (char *) r.base); + ctx->neworigin = NULL; + } + + again: + for (i = 0; + itresult == ISC_R_SUCCESS && i < MAXSORT; + itresult = dns_rdatasetiter_next(rdsiter), i++) { + dns_rdataset_init(&rdatasets[i]); + dns_rdatasetiter_current(rdsiter, &rdatasets[i]); + sorted[i] = &rdatasets[i]; + } + n = i; + INSIST(n <= MAXSORT); + + qsort(sorted, n, sizeof(sorted[0]), dump_order_compare); + + for (i = 0; i < n; i++) { + dns_rdataset_t *rds = sorted[i]; + if (ctx->style.flags & DNS_STYLEFLAG_TRUST) + fprintf(f, "; %s\n", dns_trust_totext(rds->trust)); + if (((rds->attributes & DNS_RDATASETATTR_NEGATIVE) != 0) && + (ctx->style.flags & DNS_STYLEFLAG_NCACHE) == 0) { + /* Omit negative cache entries */ + } else { + isc_result_t result = + dump_rdataset(mctx, name, rds, ctx, + buffer, f); + if (result != ISC_R_SUCCESS) + dumpresult = result; + if ((ctx->style.flags & DNS_STYLEFLAG_OMIT_OWNER) != 0) + name = NULL; + } + if (ctx->style.flags & DNS_STYLEFLAG_RESIGN && + rds->attributes & DNS_RDATASETATTR_RESIGN) { + isc_buffer_t b; + char buf[sizeof("YYYYMMDDHHMMSS")]; + memset(buf, 0, sizeof(buf)); + isc_buffer_init(&b, buf, sizeof(buf) - 1); + dns_time64_totext((isc_uint64_t)rds->resign, &b); + fprintf(f, "; resign=%s\n", buf); + } + dns_rdataset_disassociate(rds); + } + + if (dumpresult != ISC_R_SUCCESS) + return (dumpresult); + + /* + * If we got more data than could be sorted at once, + * go handle the rest. + */ + if (itresult == ISC_R_SUCCESS) + goto again; + + if (itresult == ISC_R_NOMORE) + itresult = ISC_R_SUCCESS; + + return (itresult); +} + +/* + * Dump given RRsets in the "raw" format. + */ +static isc_result_t +dump_rdataset_raw(isc_mem_t *mctx, dns_name_t *name, dns_rdataset_t *rdataset, + isc_buffer_t *buffer, FILE *f) +{ + isc_result_t result; + isc_uint32_t totallen; + isc_uint16_t dlen; + isc_region_t r, r_hdr; + + REQUIRE(buffer->length > 0); + REQUIRE(DNS_RDATASET_VALID(rdataset)); + + rdataset->attributes |= DNS_RDATASETATTR_LOADORDER; + restart: + totallen = 0; + result = dns_rdataset_first(rdataset); + REQUIRE(result == ISC_R_SUCCESS); + + isc_buffer_clear(buffer); + + /* + * Common header and owner name (length followed by name) + * These fields should be in a moderate length, so we assume we + * can store all of them in the initial buffer. + */ + isc_buffer_availableregion(buffer, &r_hdr); + INSIST(r_hdr.length >= sizeof(dns_masterrawrdataset_t)); + isc_buffer_putuint32(buffer, totallen); /* XXX: leave space */ + isc_buffer_putuint16(buffer, rdataset->rdclass); /* 16-bit class */ + isc_buffer_putuint16(buffer, rdataset->type); /* 16-bit type */ + isc_buffer_putuint16(buffer, rdataset->covers); /* same as type */ + isc_buffer_putuint32(buffer, rdataset->ttl); /* 32-bit TTL */ + isc_buffer_putuint32(buffer, dns_rdataset_count(rdataset)); + totallen = isc_buffer_usedlength(buffer); + INSIST(totallen <= sizeof(dns_masterrawrdataset_t)); + + dns_name_toregion(name, &r); + INSIST(isc_buffer_availablelength(buffer) >= + (sizeof(dlen) + r.length)); + dlen = (isc_uint16_t)r.length; + isc_buffer_putuint16(buffer, dlen); + isc_buffer_copyregion(buffer, &r); + totallen += sizeof(dlen) + r.length; + + do { + dns_rdata_t rdata = DNS_RDATA_INIT; + isc_region_t r; + + dns_rdataset_current(rdataset, &rdata); + dns_rdata_toregion(&rdata, &r); + INSIST(r.length <= 0xffffU); + dlen = (isc_uint16_t)r.length; + + /* + * Copy the rdata into the buffer. If the buffer is too small, + * grow it. This should be rare, so we'll simply restart the + * entire procedure (or should we copy the old data and + * continue?). + */ + if (isc_buffer_availablelength(buffer) < + sizeof(dlen) + r.length) { + int newlength; + void *newmem; + + newlength = buffer->length * 2; + newmem = isc_mem_get(mctx, newlength); + if (newmem == NULL) + return (ISC_R_NOMEMORY); + isc_mem_put(mctx, buffer->base, buffer->length); + isc_buffer_init(buffer, newmem, newlength); + goto restart; + } + isc_buffer_putuint16(buffer, dlen); + isc_buffer_copyregion(buffer, &r); + totallen += sizeof(dlen) + r.length; + + result = dns_rdataset_next(rdataset); + } while (result == ISC_R_SUCCESS); + + if (result != ISC_R_NOMORE) + return (result); + + /* + * Fill in the total length field. + * XXX: this is a bit tricky. Since we have already "used" the space + * for the total length in the buffer, we first remember the entire + * buffer length in the region, "rewind", and then write the value. + */ + isc_buffer_usedregion(buffer, &r); + isc_buffer_clear(buffer); + isc_buffer_putuint32(buffer, totallen); + INSIST(isc_buffer_usedlength(buffer) < totallen); + + /* + * Write the buffer contents to the raw master file. + */ + result = isc_stdio_write(r.base, 1, (size_t)r.length, f, NULL); + + if (result != ISC_R_SUCCESS) { + UNEXPECTED_ERROR(__FILE__, __LINE__, + "raw master file write failed: %s", + isc_result_totext(result)); + return (result); + } + + return (result); +} + +static isc_result_t +dump_rdatasets_raw(isc_mem_t *mctx, dns_name_t *name, + dns_rdatasetiter_t *rdsiter, dns_totext_ctx_t *ctx, + isc_buffer_t *buffer, FILE *f) +{ + isc_result_t result; + dns_rdataset_t rdataset; + + for (result = dns_rdatasetiter_first(rdsiter); + result == ISC_R_SUCCESS; + result = dns_rdatasetiter_next(rdsiter)) { + + dns_rdataset_init(&rdataset); + dns_rdatasetiter_current(rdsiter, &rdataset); + + if (((rdataset.attributes & DNS_RDATASETATTR_NEGATIVE) != 0) && + (ctx->style.flags & DNS_STYLEFLAG_NCACHE) == 0) { + /* Omit negative cache entries */ + } else { + result = dump_rdataset_raw(mctx, name, &rdataset, + buffer, f); + } + dns_rdataset_disassociate(&rdataset); + if (result != ISC_R_SUCCESS) + return (result); + } + + if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + + return (result); +} + +/* + * Initial size of text conversion buffer. The buffer is used + * for several purposes: converting origin names, rdatasets, + * $DATE timestamps, and comment strings for $TTL directives. + * + * When converting rdatasets, it is dynamically resized, but + * when converting origins, timestamps, etc it is not. Therefore, + * the initial size must large enough to hold the longest possible + * text representation of any domain name (for $ORIGIN). + */ +static const int initial_buffer_length = 1200; + +static isc_result_t +dumptostreaminc(dns_dumpctx_t *dctx); + +static void +dumpctx_destroy(dns_dumpctx_t *dctx) { + + dctx->magic = 0; + DESTROYLOCK(&dctx->lock); + dns_dbiterator_destroy(&dctx->dbiter); + if (dctx->version != NULL) + dns_db_closeversion(dctx->db, &dctx->version, ISC_FALSE); + dns_db_detach(&dctx->db); + if (dctx->task != NULL) + isc_task_detach(&dctx->task); + if (dctx->file != NULL) + isc_mem_free(dctx->mctx, dctx->file); + if (dctx->tmpfile != NULL) + isc_mem_free(dctx->mctx, dctx->tmpfile); + isc_mem_putanddetach(&dctx->mctx, dctx, sizeof(*dctx)); +} + +void +dns_dumpctx_attach(dns_dumpctx_t *source, dns_dumpctx_t **target) { + + REQUIRE(DNS_DCTX_VALID(source)); + REQUIRE(target != NULL && *target == NULL); + + LOCK(&source->lock); + INSIST(source->references > 0); + source->references++; + INSIST(source->references != 0); /* Overflow? */ + UNLOCK(&source->lock); + + *target = source; +} + +void +dns_dumpctx_detach(dns_dumpctx_t **dctxp) { + dns_dumpctx_t *dctx; + isc_boolean_t need_destroy = ISC_FALSE; + + REQUIRE(dctxp != NULL); + dctx = *dctxp; + REQUIRE(DNS_DCTX_VALID(dctx)); + + *dctxp = NULL; + + LOCK(&dctx->lock); + INSIST(dctx->references != 0); + dctx->references--; + if (dctx->references == 0) + need_destroy = ISC_TRUE; + UNLOCK(&dctx->lock); + if (need_destroy) + dumpctx_destroy(dctx); +} + +dns_dbversion_t * +dns_dumpctx_version(dns_dumpctx_t *dctx) { + REQUIRE(DNS_DCTX_VALID(dctx)); + return (dctx->version); +} + +dns_db_t * +dns_dumpctx_db(dns_dumpctx_t *dctx) { + REQUIRE(DNS_DCTX_VALID(dctx)); + return (dctx->db); +} + +void +dns_dumpctx_cancel(dns_dumpctx_t *dctx) { + REQUIRE(DNS_DCTX_VALID(dctx)); + + LOCK(&dctx->lock); + dctx->canceled = ISC_TRUE; + UNLOCK(&dctx->lock); +} + +static isc_result_t +closeandrename(FILE *f, isc_result_t result, const char *temp, const char *file) +{ + isc_result_t tresult; + isc_boolean_t logit = ISC_TF(result == ISC_R_SUCCESS); + + if (result == ISC_R_SUCCESS) + result = isc_stdio_sync(f); + if (result != ISC_R_SUCCESS && logit) { + isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, + "dumping master file: %s: fsync: %s", + temp, isc_result_totext(result)); + logit = ISC_FALSE; + } + tresult = isc_stdio_close(f); + if (result == ISC_R_SUCCESS) + result = tresult; + if (result != ISC_R_SUCCESS && logit) { + isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, + "dumping master file: %s: fclose: %s", + temp, isc_result_totext(result)); + logit = ISC_FALSE; + } + if (result == ISC_R_SUCCESS) + result = isc_file_rename(temp, file); + else + (void)isc_file_remove(temp); + if (result != ISC_R_SUCCESS && logit) { + isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, + "dumping master file: rename: %s: %s", + file, isc_result_totext(result)); + } + return (result); +} + +static void +dump_quantum(isc_task_t *task, isc_event_t *event) { + isc_result_t result; + isc_result_t tresult; + dns_dumpctx_t *dctx; + + REQUIRE(event != NULL); + dctx = event->ev_arg; + REQUIRE(DNS_DCTX_VALID(dctx)); + if (dctx->canceled) + result = ISC_R_CANCELED; + else + result = dumptostreaminc(dctx); + if (result == DNS_R_CONTINUE) { + event->ev_arg = dctx; + isc_task_send(task, &event); + return; + } + + if (dctx->file != NULL) { + tresult = closeandrename(dctx->f, result, + dctx->tmpfile, dctx->file); + if (tresult != ISC_R_SUCCESS && result == ISC_R_SUCCESS) + result = tresult; + } + (dctx->done)(dctx->done_arg, result); + isc_event_free(&event); + dns_dumpctx_detach(&dctx); +} + +static isc_result_t +task_send(dns_dumpctx_t *dctx) { + isc_event_t *event; + + event = isc_event_allocate(dctx->mctx, NULL, DNS_EVENT_DUMPQUANTUM, + dump_quantum, dctx, sizeof(*event)); + if (event == NULL) + return (ISC_R_NOMEMORY); + isc_task_send(dctx->task, &event); + return (ISC_R_SUCCESS); +} + +static isc_result_t +dumpctx_create(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, + const dns_master_style_t *style, FILE *f, dns_dumpctx_t **dctxp, + dns_masterformat_t format) +{ + dns_dumpctx_t *dctx; + isc_result_t result; + unsigned int options; + + dctx = isc_mem_get(mctx, sizeof(*dctx)); + if (dctx == NULL) + return (ISC_R_NOMEMORY); + + dctx->mctx = NULL; + dctx->f = f; + dctx->dbiter = NULL; + dctx->db = NULL; + dctx->version = NULL; + dctx->done = NULL; + dctx->done_arg = NULL; + dctx->task = NULL; + dctx->nodes = 0; + dctx->first = ISC_TRUE; + dctx->canceled = ISC_FALSE; + dctx->file = NULL; + dctx->tmpfile = NULL; + dctx->format = format; + + switch (format) { + case dns_masterformat_text: + dctx->dumpsets = dump_rdatasets_text; + break; + case dns_masterformat_raw: + dctx->dumpsets = dump_rdatasets_raw; + break; + default: + INSIST(0); + break; + } + + result = totext_ctx_init(style, &dctx->tctx); + if (result != ISC_R_SUCCESS) { + UNEXPECTED_ERROR(__FILE__, __LINE__, + "could not set master file style"); + goto cleanup; + } + + isc_stdtime_get(&dctx->now); + dns_db_attach(db, &dctx->db); + + dctx->do_date = dns_db_iscache(dctx->db); + + if (dctx->format == dns_masterformat_text && + (dctx->tctx.style.flags & DNS_STYLEFLAG_REL_OWNER) != 0) { + options = DNS_DB_RELATIVENAMES; + } else + options = 0; + result = dns_db_createiterator(dctx->db, options, &dctx->dbiter); + if (result != ISC_R_SUCCESS) + goto cleanup; + + result = isc_mutex_init(&dctx->lock); + if (result != ISC_R_SUCCESS) + goto cleanup; + if (version != NULL) + dns_db_attachversion(dctx->db, version, &dctx->version); + else if (!dns_db_iscache(db)) + dns_db_currentversion(dctx->db, &dctx->version); + isc_mem_attach(mctx, &dctx->mctx); + dctx->references = 1; + dctx->magic = DNS_DCTX_MAGIC; + *dctxp = dctx; + return (ISC_R_SUCCESS); + + cleanup: + if (dctx->dbiter != NULL) + dns_dbiterator_destroy(&dctx->dbiter); + if (dctx->db != NULL) + dns_db_detach(&dctx->db); + if (dctx != NULL) + isc_mem_put(mctx, dctx, sizeof(*dctx)); + return (result); +} + +static isc_result_t +dumptostreaminc(dns_dumpctx_t *dctx) { + isc_result_t result; + isc_buffer_t buffer; + char *bufmem; + isc_region_t r; + dns_name_t *name; + dns_fixedname_t fixname; + unsigned int nodes; + dns_masterrawheader_t rawheader; + isc_uint32_t now32; + isc_time_t start; + + bufmem = isc_mem_get(dctx->mctx, initial_buffer_length); + if (bufmem == NULL) + return (ISC_R_NOMEMORY); + + isc_buffer_init(&buffer, bufmem, initial_buffer_length); + + dns_fixedname_init(&fixname); + name = dns_fixedname_name(&fixname); + + if (dctx->first) { + switch (dctx->format) { + case dns_masterformat_text: + /* + * If the database has cache semantics, output an + * RFC2540 $DATE directive so that the TTLs can be + * adjusted when it is reloaded. For zones it is not + * really needed, and it would make the file + * incompatible with pre-RFC2540 software, so we omit + * it in the zone case. + */ + if (dctx->do_date) { + result = dns_time32_totext(dctx->now, &buffer); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + isc_buffer_usedregion(&buffer, &r); + fprintf(dctx->f, "$DATE %.*s\n", + (int) r.length, (char *) r.base); + } + break; + case dns_masterformat_raw: + r.base = (unsigned char *)&rawheader; + r.length = sizeof(rawheader); + isc_buffer_region(&buffer, &r); + isc_buffer_putuint32(&buffer, dns_masterformat_raw); + isc_buffer_putuint32(&buffer, DNS_RAWFORMAT_VERSION); +#if !defined(STDTIME_ON_32BITS) || (STDTIME_ON_32BITS + 0) != 1 + /* + * We assume isc_stdtime_t is a 32-bit integer, + * which should be the case on most cases. + * If it turns out to be uncommon, we'll need + * to bump the version number and revise the + * header format. + */ + isc_log_write(dns_lctx, + ISC_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_MASTERDUMP, + ISC_LOG_INFO, + "dumping master file in raw " + "format: stdtime is not 32bits"); + now32 = 0; +#else + now32 = dctx->now; +#endif + isc_buffer_putuint32(&buffer, now32); + INSIST(isc_buffer_usedlength(&buffer) <= + sizeof(rawheader)); + result = isc_stdio_write(buffer.base, 1, + isc_buffer_usedlength(&buffer), + dctx->f, NULL); + if (result != ISC_R_SUCCESS) + return (result); + isc_buffer_clear(&buffer); + break; + default: + INSIST(0); + } + + result = dns_dbiterator_first(dctx->dbiter); + dctx->first = ISC_FALSE; + } else + result = ISC_R_SUCCESS; + + nodes = dctx->nodes; + isc_time_now(&start); + while (result == ISC_R_SUCCESS && (dctx->nodes == 0 || nodes--)) { + dns_rdatasetiter_t *rdsiter = NULL; + dns_dbnode_t *node = NULL; + + result = dns_dbiterator_current(dctx->dbiter, &node, name); + if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) + break; + if (result == DNS_R_NEWORIGIN) { + dns_name_t *origin = + dns_fixedname_name(&dctx->tctx.origin_fixname); + result = dns_dbiterator_origin(dctx->dbiter, origin); + RUNTIME_CHECK(result == ISC_R_SUCCESS); + if ((dctx->tctx.style.flags & DNS_STYLEFLAG_REL_DATA) != 0) + dctx->tctx.origin = origin; + dctx->tctx.neworigin = origin; + } + result = dns_db_allrdatasets(dctx->db, node, dctx->version, + dctx->now, &rdsiter); + if (result != ISC_R_SUCCESS) { + dns_db_detachnode(dctx->db, &node); + goto fail; + } + result = (dctx->dumpsets)(dctx->mctx, name, rdsiter, + &dctx->tctx, &buffer, dctx->f); + dns_rdatasetiter_destroy(&rdsiter); + if (result != ISC_R_SUCCESS) { + dns_db_detachnode(dctx->db, &node); + goto fail; + } + dns_db_detachnode(dctx->db, &node); + result = dns_dbiterator_next(dctx->dbiter); + } + + /* + * Work out how many nodes can be written in the time between + * two requests to the nameserver. Smooth the resulting number and + * use it as a estimate for the number of nodes to be written in the + * next iteration. + */ + if (dctx->nodes != 0 && result == ISC_R_SUCCESS) { + unsigned int pps = dns_pps; /* packets per second */ + unsigned int interval; + isc_uint64_t usecs; + isc_time_t end; + + isc_time_now(&end); + if (pps < 100) + pps = 100; + interval = 1000000 / pps; /* interval in usecs */ + if (interval == 0) + interval = 1; + usecs = isc_time_microdiff(&end, &start); + if (usecs == 0) { + dctx->nodes = dctx->nodes * 2; + if (dctx->nodes > 1000) + dctx->nodes = 1000; + } else { + nodes = dctx->nodes * interval; + nodes /= (unsigned int)usecs; + if (nodes == 0) + nodes = 1; + else if (nodes > 1000) + nodes = 1000; + + /* Smooth and assign. */ + dctx->nodes = (nodes + dctx->nodes * 7) / 8; + + isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_MASTERDUMP, + ISC_LOG_DEBUG(1), + "dumptostreaminc(%p) new nodes -> %d\n", + dctx, dctx->nodes); + } + result = DNS_R_CONTINUE; + } else if (result == ISC_R_NOMORE) + result = ISC_R_SUCCESS; + fail: + RUNTIME_CHECK(dns_dbiterator_pause(dctx->dbiter) == ISC_R_SUCCESS); + isc_mem_put(dctx->mctx, buffer.base, buffer.length); + return (result); +} + +isc_result_t +dns_master_dumptostreaminc(isc_mem_t *mctx, dns_db_t *db, + dns_dbversion_t *version, + const dns_master_style_t *style, + FILE *f, isc_task_t *task, + dns_dumpdonefunc_t done, void *done_arg, + dns_dumpctx_t **dctxp) +{ + dns_dumpctx_t *dctx = NULL; + isc_result_t result; + + REQUIRE(task != NULL); + REQUIRE(f != NULL); + REQUIRE(done != NULL); + + result = dumpctx_create(mctx, db, version, style, f, &dctx, + dns_masterformat_text); + if (result != ISC_R_SUCCESS) + return (result); + isc_task_attach(task, &dctx->task); + dctx->done = done; + dctx->done_arg = done_arg; + dctx->nodes = 100; + + result = task_send(dctx); + if (result == ISC_R_SUCCESS) { + dns_dumpctx_attach(dctx, dctxp); + return (DNS_R_CONTINUE); + } + + dns_dumpctx_detach(&dctx); + return (result); +} + +/* + * Dump an entire database into a master file. + */ +isc_result_t +dns_master_dumptostream(isc_mem_t *mctx, dns_db_t *db, + dns_dbversion_t *version, + const dns_master_style_t *style, + FILE *f) +{ + return (dns_master_dumptostream2(mctx, db, version, style, + dns_masterformat_text, f)); +} + +isc_result_t +dns_master_dumptostream2(isc_mem_t *mctx, dns_db_t *db, + dns_dbversion_t *version, + const dns_master_style_t *style, + dns_masterformat_t format, FILE *f) +{ + dns_dumpctx_t *dctx = NULL; + isc_result_t result; + + result = dumpctx_create(mctx, db, version, style, f, &dctx, format); + if (result != ISC_R_SUCCESS) + return (result); + + result = dumptostreaminc(dctx); + INSIST(result != DNS_R_CONTINUE); + dns_dumpctx_detach(&dctx); + return (result); +} + +static isc_result_t +opentmp(isc_mem_t *mctx, const char *file, char **tempp, FILE **fp) { + FILE *f = NULL; + isc_result_t result; + char *tempname = NULL; + int tempnamelen; + + tempnamelen = strlen(file) + 20; + tempname = isc_mem_allocate(mctx, tempnamelen); + if (tempname == NULL) + return (ISC_R_NOMEMORY); + + result = isc_file_mktemplate(file, tempname, tempnamelen); + if (result != ISC_R_SUCCESS) + goto cleanup; + + result = isc_file_openunique(tempname, &f); + if (result != ISC_R_SUCCESS) { + isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, + "dumping master file: %s: open: %s", + tempname, isc_result_totext(result)); + goto cleanup; + } + *tempp = tempname; + *fp = f; + return (ISC_R_SUCCESS); + +cleanup: + isc_mem_free(mctx, tempname); + return (result); +} + +isc_result_t +dns_master_dumpinc(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, + const dns_master_style_t *style, const char *filename, + isc_task_t *task, dns_dumpdonefunc_t done, void *done_arg, + dns_dumpctx_t **dctxp) +{ + return (dns_master_dumpinc2(mctx, db, version, style, filename, task, + done, done_arg, dctxp, + dns_masterformat_text)); +} + +isc_result_t +dns_master_dumpinc2(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, + const dns_master_style_t *style, const char *filename, + isc_task_t *task, dns_dumpdonefunc_t done, void *done_arg, + dns_dumpctx_t **dctxp, dns_masterformat_t format) +{ + FILE *f = NULL; + isc_result_t result; + char *tempname = NULL; + char *file = NULL; + dns_dumpctx_t *dctx = NULL; + + file = isc_mem_strdup(mctx, filename); + if (file == NULL) + return (ISC_R_NOMEMORY); + + result = opentmp(mctx, filename, &tempname, &f); + if (result != ISC_R_SUCCESS) + goto cleanup; + + result = dumpctx_create(mctx, db, version, style, f, &dctx, format); + if (result != ISC_R_SUCCESS) { + (void)isc_stdio_close(f); + (void)isc_file_remove(tempname); + goto cleanup; + } + + isc_task_attach(task, &dctx->task); + dctx->done = done; + dctx->done_arg = done_arg; + dctx->nodes = 100; + dctx->file = file; + file = NULL; + dctx->tmpfile = tempname; + tempname = NULL; + + result = task_send(dctx); + if (result == ISC_R_SUCCESS) { + dns_dumpctx_attach(dctx, dctxp); + return (DNS_R_CONTINUE); + } + + cleanup: + if (dctx != NULL) + dns_dumpctx_detach(&dctx); + if (file != NULL) + isc_mem_free(mctx, file); + if (tempname != NULL) + isc_mem_free(mctx, tempname); + return (result); +} + +isc_result_t +dns_master_dump(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, + const dns_master_style_t *style, const char *filename) +{ + return (dns_master_dump2(mctx, db, version, style, filename, + dns_masterformat_text)); +} + +isc_result_t +dns_master_dump2(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, + const dns_master_style_t *style, const char *filename, + dns_masterformat_t format) +{ + FILE *f = NULL; + isc_result_t result; + char *tempname; + dns_dumpctx_t *dctx = NULL; + + result = opentmp(mctx, filename, &tempname, &f); + if (result != ISC_R_SUCCESS) + return (result); + + result = dumpctx_create(mctx, db, version, style, f, &dctx, format); + if (result != ISC_R_SUCCESS) + goto cleanup; + + result = dumptostreaminc(dctx); + INSIST(result != DNS_R_CONTINUE); + dns_dumpctx_detach(&dctx); + + result = closeandrename(f, result, tempname, filename); + + cleanup: + isc_mem_free(mctx, tempname); + return (result); +} + +/* + * Dump a database node into a master file. + * XXX: this function assumes the text format. + */ +isc_result_t +dns_master_dumpnodetostream(isc_mem_t *mctx, dns_db_t *db, + dns_dbversion_t *version, + dns_dbnode_t *node, dns_name_t *name, + const dns_master_style_t *style, + FILE *f) +{ + isc_result_t result; + isc_buffer_t buffer; + char *bufmem; + isc_stdtime_t now; + dns_totext_ctx_t ctx; + dns_rdatasetiter_t *rdsiter = NULL; + + result = totext_ctx_init(style, &ctx); + if (result != ISC_R_SUCCESS) { + UNEXPECTED_ERROR(__FILE__, __LINE__, + "could not set master file style"); + return (ISC_R_UNEXPECTED); + } + + isc_stdtime_get(&now); + + bufmem = isc_mem_get(mctx, initial_buffer_length); + if (bufmem == NULL) + return (ISC_R_NOMEMORY); + + isc_buffer_init(&buffer, bufmem, initial_buffer_length); + + result = dns_db_allrdatasets(db, node, version, now, &rdsiter); + if (result != ISC_R_SUCCESS) + goto failure; + result = dump_rdatasets_text(mctx, name, rdsiter, &ctx, &buffer, f); + if (result != ISC_R_SUCCESS) + goto failure; + dns_rdatasetiter_destroy(&rdsiter); + + result = ISC_R_SUCCESS; + + failure: + isc_mem_put(mctx, buffer.base, buffer.length); + return (result); +} + +isc_result_t +dns_master_dumpnode(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version, + dns_dbnode_t *node, dns_name_t *name, + const dns_master_style_t *style, const char *filename) +{ + FILE *f = NULL; + isc_result_t result; + + result = isc_stdio_open(filename, "w", &f); + if (result != ISC_R_SUCCESS) { + isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, + "dumping node to file: %s: open: %s", filename, + isc_result_totext(result)); + return (ISC_R_UNEXPECTED); + } + + result = dns_master_dumpnodetostream(mctx, db, version, node, name, + style, f); + if (result != ISC_R_SUCCESS) { + isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, + "dumping master file: %s: dump: %s", filename, + isc_result_totext(result)); + (void)isc_stdio_close(f); + return (ISC_R_UNEXPECTED); + } + + result = isc_stdio_close(f); + if (result != ISC_R_SUCCESS) { + isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, + DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR, + "dumping master file: %s: close: %s", filename, + isc_result_totext(result)); + return (ISC_R_UNEXPECTED); + } + + return (result); +} +#endif /* BIND9 */ + +isc_result_t +dns_master_stylecreate(dns_master_style_t **stylep, unsigned int flags, + unsigned int ttl_column, unsigned int class_column, + unsigned int type_column, unsigned int rdata_column, + unsigned int line_length, unsigned int tab_width, + isc_mem_t *mctx) +{ + dns_master_style_t *style; + + REQUIRE(stylep != NULL && *stylep == NULL); + style = isc_mem_get(mctx, sizeof(*style)); + if (style == NULL) + return (ISC_R_NOMEMORY); + + style->flags = flags; + style->ttl_column = ttl_column; + style->class_column = class_column; + style->type_column = type_column; + style->rdata_column = rdata_column; + style->line_length = line_length; + style->tab_width = tab_width; + + *stylep = style; + return (ISC_R_SUCCESS); +} + +void +dns_master_styledestroy(dns_master_style_t **stylep, isc_mem_t *mctx) { + dns_master_style_t *style; + + REQUIRE(stylep != NULL && *stylep != NULL); + style = *stylep; + *stylep = NULL; + isc_mem_put(mctx, style, sizeof(*style)); +} |