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-rw-r--r--lib/dns/rdata.c2365
1 files changed, 2365 insertions, 0 deletions
diff --git a/lib/dns/rdata.c b/lib/dns/rdata.c
new file mode 100644
index 0000000..a283831
--- /dev/null
+++ b/lib/dns/rdata.c
@@ -0,0 +1,2365 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*! \file */
+
+#include <ctype.h>
+#include <inttypes.h>
+#include <stdbool.h>
+
+#include <isc/base64.h>
+#include <isc/hex.h>
+#include <isc/lex.h>
+#include <isc/mem.h>
+#include <isc/parseint.h>
+#include <isc/print.h>
+#include <isc/string.h>
+#include <isc/util.h>
+
+#include <dns/callbacks.h>
+#include <dns/cert.h>
+#include <dns/compress.h>
+#include <dns/dsdigest.h>
+#include <dns/enumtype.h>
+#include <dns/keyflags.h>
+#include <dns/keyvalues.h>
+#include <dns/message.h>
+#include <dns/rcode.h>
+#include <dns/rdata.h>
+#include <dns/rdataclass.h>
+#include <dns/rdatastruct.h>
+#include <dns/rdatatype.h>
+#include <dns/result.h>
+#include <dns/secalg.h>
+#include <dns/secproto.h>
+#include <dns/time.h>
+#include <dns/ttl.h>
+
+#define RETERR(x) \
+ do { \
+ isc_result_t _r = (x); \
+ if (_r != ISC_R_SUCCESS) \
+ return ((_r)); \
+ } while (0)
+
+#define RETTOK(x) \
+ do { \
+ isc_result_t _r = (x); \
+ if (_r != ISC_R_SUCCESS) { \
+ isc_lex_ungettoken(lexer, &token); \
+ return (_r); \
+ } \
+ } while (0)
+
+#define CHECK(op) \
+ do { \
+ result = (op); \
+ if (result != ISC_R_SUCCESS) \
+ goto cleanup; \
+ } while (0)
+
+#define CHECKTOK(op) \
+ do { \
+ result = (op); \
+ if (result != ISC_R_SUCCESS) { \
+ isc_lex_ungettoken(lexer, &token); \
+ goto cleanup; \
+ } \
+ } while (0)
+
+#define DNS_AS_STR(t) ((t).value.as_textregion.base)
+
+#define ARGS_FROMTEXT \
+ int rdclass, dns_rdatatype_t type, isc_lex_t *lexer, \
+ const dns_name_t *origin, unsigned int options, \
+ isc_buffer_t *target, dns_rdatacallbacks_t *callbacks
+
+#define CALL_FROMTEXT rdclass, type, lexer, origin, options, target, callbacks
+
+#define ARGS_TOTEXT \
+ dns_rdata_t *rdata, dns_rdata_textctx_t *tctx, isc_buffer_t *target
+
+#define CALL_TOTEXT rdata, tctx, target
+
+#define ARGS_FROMWIRE \
+ int rdclass, dns_rdatatype_t type, isc_buffer_t *source, \
+ dns_decompress_t *dctx, unsigned int options, \
+ isc_buffer_t *target
+
+#define CALL_FROMWIRE rdclass, type, source, dctx, options, target
+
+#define ARGS_TOWIRE \
+ dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target
+
+#define CALL_TOWIRE rdata, cctx, target
+
+#define ARGS_COMPARE const dns_rdata_t *rdata1, const dns_rdata_t *rdata2
+
+#define CALL_COMPARE rdata1, rdata2
+
+#define ARGS_FROMSTRUCT \
+ int rdclass, dns_rdatatype_t type, void *source, isc_buffer_t *target
+
+#define CALL_FROMSTRUCT rdclass, type, source, target
+
+#define ARGS_TOSTRUCT const dns_rdata_t *rdata, void *target, isc_mem_t *mctx
+
+#define CALL_TOSTRUCT rdata, target, mctx
+
+#define ARGS_FREESTRUCT void *source
+
+#define CALL_FREESTRUCT source
+
+#define ARGS_ADDLDATA \
+ dns_rdata_t *rdata, dns_additionaldatafunc_t add, void *arg
+
+#define CALL_ADDLDATA rdata, add, arg
+
+#define ARGS_DIGEST dns_rdata_t *rdata, dns_digestfunc_t digest, void *arg
+
+#define CALL_DIGEST rdata, digest, arg
+
+#define ARGS_CHECKOWNER \
+ const dns_name_t *name, dns_rdataclass_t rdclass, \
+ dns_rdatatype_t type, bool wildcard
+
+#define CALL_CHECKOWNER name, rdclass, type, wildcard
+
+#define ARGS_CHECKNAMES \
+ dns_rdata_t *rdata, const dns_name_t *owner, dns_name_t *bad
+
+#define CALL_CHECKNAMES rdata, owner, bad
+
+/*%
+ * Context structure for the totext_ functions.
+ * Contains formatting options for rdata-to-text
+ * conversion.
+ */
+typedef struct dns_rdata_textctx {
+ const dns_name_t *origin; /*%< Current origin, or NULL. */
+ dns_masterstyle_flags_t flags; /*%< DNS_STYLEFLAG_* */
+ unsigned int width; /*%< Width of rdata column. */
+ const char *linebreak; /*%< Line break string. */
+} dns_rdata_textctx_t;
+
+static isc_result_t
+txt_totext(isc_region_t *source, bool quote, isc_buffer_t *target);
+
+static isc_result_t
+txt_fromtext(isc_textregion_t *source, isc_buffer_t *target);
+
+static isc_result_t
+txt_fromwire(isc_buffer_t *source, isc_buffer_t *target);
+
+static isc_result_t
+commatxt_fromtext(isc_textregion_t *source, bool comma, isc_buffer_t *target);
+
+static isc_result_t
+commatxt_totext(isc_region_t *source, bool quote, bool comma,
+ isc_buffer_t *target);
+
+static isc_result_t
+multitxt_totext(isc_region_t *source, isc_buffer_t *target);
+
+static isc_result_t
+multitxt_fromtext(isc_textregion_t *source, isc_buffer_t *target);
+
+static bool
+name_prefix(dns_name_t *name, const dns_name_t *origin, dns_name_t *target);
+
+static unsigned int
+name_length(const dns_name_t *name);
+
+static isc_result_t
+str_totext(const char *source, isc_buffer_t *target);
+
+static isc_result_t
+inet_totext(int af, uint32_t flags, isc_region_t *src, isc_buffer_t *target);
+
+static bool
+buffer_empty(isc_buffer_t *source);
+
+static void
+buffer_fromregion(isc_buffer_t *buffer, isc_region_t *region);
+
+static isc_result_t
+uint32_tobuffer(uint32_t, isc_buffer_t *target);
+
+static isc_result_t
+uint16_tobuffer(uint32_t, isc_buffer_t *target);
+
+static isc_result_t
+uint8_tobuffer(uint32_t, isc_buffer_t *target);
+
+static isc_result_t
+name_tobuffer(const dns_name_t *name, isc_buffer_t *target);
+
+static uint32_t
+uint32_fromregion(isc_region_t *region);
+
+static uint16_t
+uint16_fromregion(isc_region_t *region);
+
+static uint8_t
+uint8_fromregion(isc_region_t *region);
+
+static uint8_t
+uint8_consume_fromregion(isc_region_t *region);
+
+static isc_result_t
+mem_tobuffer(isc_buffer_t *target, void *base, unsigned int length);
+
+static int
+hexvalue(char value);
+
+static int
+decvalue(char value);
+
+static void
+default_fromtext_callback(dns_rdatacallbacks_t *callbacks, const char *, ...)
+ ISC_FORMAT_PRINTF(2, 3);
+
+static void
+fromtext_error(void (*callback)(dns_rdatacallbacks_t *, const char *, ...),
+ dns_rdatacallbacks_t *callbacks, const char *name,
+ unsigned long line, isc_token_t *token, isc_result_t result);
+
+static void
+fromtext_warneof(isc_lex_t *lexer, dns_rdatacallbacks_t *callbacks);
+
+static isc_result_t
+rdata_totext(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
+ isc_buffer_t *target);
+
+static void
+warn_badname(const dns_name_t *name, isc_lex_t *lexer,
+ dns_rdatacallbacks_t *callbacks);
+
+static void
+warn_badmx(isc_token_t *token, isc_lex_t *lexer,
+ dns_rdatacallbacks_t *callbacks);
+
+static uint16_t
+uint16_consume_fromregion(isc_region_t *region);
+
+static isc_result_t
+unknown_totext(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
+ isc_buffer_t *target);
+
+static isc_result_t generic_fromtext_key(ARGS_FROMTEXT);
+
+static isc_result_t generic_totext_key(ARGS_TOTEXT);
+
+static isc_result_t generic_fromwire_key(ARGS_FROMWIRE);
+
+static isc_result_t generic_fromstruct_key(ARGS_FROMSTRUCT);
+
+static isc_result_t generic_tostruct_key(ARGS_TOSTRUCT);
+
+static void generic_freestruct_key(ARGS_FREESTRUCT);
+
+static isc_result_t generic_fromtext_txt(ARGS_FROMTEXT);
+
+static isc_result_t generic_totext_txt(ARGS_TOTEXT);
+
+static isc_result_t generic_fromwire_txt(ARGS_FROMWIRE);
+
+static isc_result_t generic_fromstruct_txt(ARGS_FROMSTRUCT);
+
+static isc_result_t generic_tostruct_txt(ARGS_TOSTRUCT);
+
+static void generic_freestruct_txt(ARGS_FREESTRUCT);
+
+static isc_result_t
+generic_txt_first(dns_rdata_txt_t *txt);
+
+static isc_result_t
+generic_txt_next(dns_rdata_txt_t *txt);
+
+static isc_result_t
+generic_txt_current(dns_rdata_txt_t *txt, dns_rdata_txt_string_t *string);
+
+static isc_result_t generic_totext_ds(ARGS_TOTEXT);
+
+static isc_result_t generic_tostruct_ds(ARGS_TOSTRUCT);
+
+static isc_result_t generic_fromtext_ds(ARGS_FROMTEXT);
+
+static isc_result_t generic_fromwire_ds(ARGS_FROMWIRE);
+
+static isc_result_t generic_fromstruct_ds(ARGS_FROMSTRUCT);
+
+static isc_result_t generic_fromtext_tlsa(ARGS_FROMTEXT);
+
+static isc_result_t generic_totext_tlsa(ARGS_TOTEXT);
+
+static isc_result_t generic_fromwire_tlsa(ARGS_FROMWIRE);
+
+static isc_result_t generic_fromstruct_tlsa(ARGS_FROMSTRUCT);
+
+static isc_result_t generic_tostruct_tlsa(ARGS_TOSTRUCT);
+
+static void generic_freestruct_tlsa(ARGS_FREESTRUCT);
+
+static isc_result_t generic_fromtext_in_svcb(ARGS_FROMTEXT);
+static isc_result_t generic_totext_in_svcb(ARGS_TOTEXT);
+static isc_result_t generic_fromwire_in_svcb(ARGS_FROMWIRE);
+static isc_result_t generic_towire_in_svcb(ARGS_TOWIRE);
+static isc_result_t generic_fromstruct_in_svcb(ARGS_FROMSTRUCT);
+static isc_result_t generic_tostruct_in_svcb(ARGS_TOSTRUCT);
+static void generic_freestruct_in_svcb(ARGS_FREESTRUCT);
+static isc_result_t generic_additionaldata_in_svcb(ARGS_ADDLDATA);
+static bool generic_checknames_in_svcb(ARGS_CHECKNAMES);
+static isc_result_t
+generic_rdata_in_svcb_first(dns_rdata_in_svcb_t *);
+static isc_result_t
+generic_rdata_in_svcb_next(dns_rdata_in_svcb_t *);
+static void
+generic_rdata_in_svcb_current(dns_rdata_in_svcb_t *, isc_region_t *);
+
+/*% INT16 Size */
+#define NS_INT16SZ 2
+/*% IPv6 Address Size */
+#define NS_LOCATORSZ 8
+
+/*
+ * Active Directory gc._msdcs.<forest> prefix.
+ */
+static unsigned char gc_msdcs_data[] = "\002gc\006_msdcs";
+static unsigned char gc_msdcs_offset[] = { 0, 3 };
+
+static dns_name_t const gc_msdcs = DNS_NAME_INITNONABSOLUTE(gc_msdcs_data,
+ gc_msdcs_offset);
+
+/*%
+ * convert presentation level address to network order binary form.
+ * \return
+ * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
+ * \note
+ * (1) does not touch `dst' unless it's returning 1.
+ */
+static int
+locator_pton(const char *src, unsigned char *dst) {
+ static const char xdigits_l[] = "0123456789abcdef",
+ xdigits_u[] = "0123456789ABCDEF";
+ unsigned char tmp[NS_LOCATORSZ];
+ unsigned char *tp = tmp, *endp;
+ const char *xdigits;
+ int ch, seen_xdigits;
+ unsigned int val;
+
+ memset(tp, '\0', NS_LOCATORSZ);
+ endp = tp + NS_LOCATORSZ;
+ seen_xdigits = 0;
+ val = 0;
+ while ((ch = *src++) != '\0') {
+ const char *pch;
+
+ pch = strchr((xdigits = xdigits_l), ch);
+ if (pch == NULL) {
+ pch = strchr((xdigits = xdigits_u), ch);
+ }
+ if (pch != NULL) {
+ val <<= 4;
+ val |= (pch - xdigits);
+ if (++seen_xdigits > 4) {
+ return (0);
+ }
+ continue;
+ }
+ if (ch == ':') {
+ if (!seen_xdigits) {
+ return (0);
+ }
+ if (tp + NS_INT16SZ > endp) {
+ return (0);
+ }
+ *tp++ = (unsigned char)(val >> 8) & 0xff;
+ *tp++ = (unsigned char)val & 0xff;
+ seen_xdigits = 0;
+ val = 0;
+ continue;
+ }
+ return (0);
+ }
+ if (seen_xdigits) {
+ if (tp + NS_INT16SZ > endp) {
+ return (0);
+ }
+ *tp++ = (unsigned char)(val >> 8) & 0xff;
+ *tp++ = (unsigned char)val & 0xff;
+ }
+ if (tp != endp) {
+ return (0);
+ }
+ memmove(dst, tmp, NS_LOCATORSZ);
+ return (1);
+}
+
+static isc_result_t
+name_duporclone(const dns_name_t *source, isc_mem_t *mctx, dns_name_t *target) {
+ if (mctx != NULL) {
+ dns_name_dup(source, mctx, target);
+ } else {
+ dns_name_clone(source, target);
+ }
+ return (ISC_R_SUCCESS);
+}
+
+static void *
+mem_maybedup(isc_mem_t *mctx, void *source, size_t length) {
+ void *copy;
+
+ if (mctx == NULL) {
+ return (source);
+ }
+ copy = isc_mem_allocate(mctx, length);
+ memmove(copy, source, length);
+
+ return (copy);
+}
+
+static isc_result_t
+typemap_fromtext(isc_lex_t *lexer, isc_buffer_t *target, bool allow_empty) {
+ isc_token_t token;
+ unsigned char bm[8 * 1024]; /* 64k bits */
+ dns_rdatatype_t covered, max_used;
+ int octet;
+ unsigned int max_octet, newend, end;
+ int window;
+ bool first = true;
+
+ max_used = 0;
+ bm[0] = 0;
+ end = 0;
+
+ do {
+ RETERR(isc_lex_getmastertoken(lexer, &token,
+ isc_tokentype_string, true));
+ if (token.type != isc_tokentype_string) {
+ break;
+ }
+ RETTOK(dns_rdatatype_fromtext(&covered,
+ &token.value.as_textregion));
+ if (covered > max_used) {
+ newend = covered / 8;
+ if (newend > end) {
+ memset(&bm[end + 1], 0, newend - end);
+ end = newend;
+ }
+ max_used = covered;
+ }
+ bm[covered / 8] |= (0x80 >> (covered % 8));
+ first = false;
+ } while (1);
+ isc_lex_ungettoken(lexer, &token);
+ if (!allow_empty && first) {
+ return (DNS_R_FORMERR);
+ }
+
+ for (window = 0; window < 256; window++) {
+ if (max_used < window * 256) {
+ break;
+ }
+
+ max_octet = max_used - (window * 256);
+ if (max_octet >= 256) {
+ max_octet = 31;
+ } else {
+ max_octet /= 8;
+ }
+
+ /*
+ * Find if we have a type in this window.
+ */
+ for (octet = max_octet; octet >= 0; octet--) {
+ if (bm[window * 32 + octet] != 0) {
+ break;
+ }
+ }
+ if (octet < 0) {
+ continue;
+ }
+ RETERR(uint8_tobuffer(window, target));
+ RETERR(uint8_tobuffer(octet + 1, target));
+ RETERR(mem_tobuffer(target, &bm[window * 32], octet + 1));
+ }
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+typemap_totext(isc_region_t *sr, dns_rdata_textctx_t *tctx,
+ isc_buffer_t *target) {
+ unsigned int i, j, k;
+ unsigned int window, len;
+ bool first = true;
+
+ for (i = 0; i < sr->length; i += len) {
+ if (tctx != NULL &&
+ (tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
+ {
+ RETERR(str_totext(tctx->linebreak, target));
+ first = true;
+ }
+ INSIST(i + 2 <= sr->length);
+ window = sr->base[i];
+ len = sr->base[i + 1];
+ INSIST(len > 0 && len <= 32);
+ i += 2;
+ INSIST(i + len <= sr->length);
+ for (j = 0; j < len; j++) {
+ dns_rdatatype_t t;
+ if (sr->base[i + j] == 0) {
+ continue;
+ }
+ for (k = 0; k < 8; k++) {
+ if ((sr->base[i + j] & (0x80 >> k)) == 0) {
+ continue;
+ }
+ t = window * 256 + j * 8 + k;
+ if (!first) {
+ RETERR(str_totext(" ", target));
+ }
+ first = false;
+ if (dns_rdatatype_isknown(t)) {
+ RETERR(dns_rdatatype_totext(t, target));
+ } else {
+ char buf[sizeof("TYPE65535")];
+ snprintf(buf, sizeof(buf), "TYPE%u", t);
+ RETERR(str_totext(buf, target));
+ }
+ }
+ }
+ }
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+typemap_test(isc_region_t *sr, bool allow_empty) {
+ unsigned int window, lastwindow = 0;
+ unsigned int len;
+ bool first = true;
+ unsigned int i;
+
+ for (i = 0; i < sr->length; i += len) {
+ /*
+ * Check for overflow.
+ */
+ if (i + 2 > sr->length) {
+ RETERR(DNS_R_FORMERR);
+ }
+ window = sr->base[i];
+ len = sr->base[i + 1];
+ i += 2;
+ /*
+ * Check that bitmap windows are in the correct order.
+ */
+ if (!first && window <= lastwindow) {
+ RETERR(DNS_R_FORMERR);
+ }
+ /*
+ * Check for legal lengths.
+ */
+ if (len < 1 || len > 32) {
+ RETERR(DNS_R_FORMERR);
+ }
+ /*
+ * Check for overflow.
+ */
+ if (i + len > sr->length) {
+ RETERR(DNS_R_FORMERR);
+ }
+ /*
+ * The last octet of the bitmap must be non zero.
+ */
+ if (sr->base[i + len - 1] == 0) {
+ RETERR(DNS_R_FORMERR);
+ }
+ lastwindow = window;
+ first = false;
+ }
+ if (i != sr->length) {
+ return (DNS_R_EXTRADATA);
+ }
+ if (!allow_empty && first) {
+ RETERR(DNS_R_FORMERR);
+ }
+ return (ISC_R_SUCCESS);
+}
+
+static const char hexdigits[] = "0123456789abcdef";
+static const char decdigits[] = "0123456789";
+
+#include "code.h"
+
+#define META 0x0001
+#define RESERVED 0x0002
+
+/***
+ *** Initialization
+ ***/
+
+void
+dns_rdata_init(dns_rdata_t *rdata) {
+ REQUIRE(rdata != NULL);
+
+ rdata->data = NULL;
+ rdata->length = 0;
+ rdata->rdclass = 0;
+ rdata->type = 0;
+ rdata->flags = 0;
+ ISC_LINK_INIT(rdata, link);
+ /* ISC_LIST_INIT(rdata->list); */
+}
+
+void
+dns_rdata_reset(dns_rdata_t *rdata) {
+ REQUIRE(rdata != NULL);
+
+ REQUIRE(!ISC_LINK_LINKED(rdata, link));
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+
+ rdata->data = NULL;
+ rdata->length = 0;
+ rdata->rdclass = 0;
+ rdata->type = 0;
+ rdata->flags = 0;
+}
+
+/***
+ ***
+ ***/
+
+void
+dns_rdata_clone(const dns_rdata_t *src, dns_rdata_t *target) {
+ REQUIRE(src != NULL);
+ REQUIRE(target != NULL);
+
+ REQUIRE(DNS_RDATA_INITIALIZED(target));
+
+ REQUIRE(DNS_RDATA_VALIDFLAGS(src));
+ REQUIRE(DNS_RDATA_VALIDFLAGS(target));
+
+ target->data = src->data;
+ target->length = src->length;
+ target->rdclass = src->rdclass;
+ target->type = src->type;
+ target->flags = src->flags;
+}
+
+/***
+ *** Comparisons
+ ***/
+
+int
+dns_rdata_compare(const dns_rdata_t *rdata1, const dns_rdata_t *rdata2) {
+ int result = 0;
+ bool use_default = false;
+
+ REQUIRE(rdata1 != NULL);
+ REQUIRE(rdata2 != NULL);
+ REQUIRE(rdata1->length == 0 || rdata1->data != NULL);
+ REQUIRE(rdata2->length == 0 || rdata2->data != NULL);
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata1));
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata2));
+
+ if (rdata1->rdclass != rdata2->rdclass) {
+ return (rdata1->rdclass < rdata2->rdclass ? -1 : 1);
+ }
+
+ if (rdata1->type != rdata2->type) {
+ return (rdata1->type < rdata2->type ? -1 : 1);
+ }
+
+ COMPARESWITCH
+
+ if (use_default) {
+ isc_region_t r1;
+ isc_region_t r2;
+
+ dns_rdata_toregion(rdata1, &r1);
+ dns_rdata_toregion(rdata2, &r2);
+ result = isc_region_compare(&r1, &r2);
+ }
+ return (result);
+}
+
+int
+dns_rdata_casecompare(const dns_rdata_t *rdata1, const dns_rdata_t *rdata2) {
+ int result = 0;
+ bool use_default = false;
+
+ REQUIRE(rdata1 != NULL);
+ REQUIRE(rdata2 != NULL);
+ REQUIRE(rdata1->length == 0 || rdata1->data != NULL);
+ REQUIRE(rdata2->length == 0 || rdata2->data != NULL);
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata1));
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata2));
+
+ if (rdata1->rdclass != rdata2->rdclass) {
+ return (rdata1->rdclass < rdata2->rdclass ? -1 : 1);
+ }
+
+ if (rdata1->type != rdata2->type) {
+ return (rdata1->type < rdata2->type ? -1 : 1);
+ }
+
+ CASECOMPARESWITCH
+
+ if (use_default) {
+ isc_region_t r1;
+ isc_region_t r2;
+
+ dns_rdata_toregion(rdata1, &r1);
+ dns_rdata_toregion(rdata2, &r2);
+ result = isc_region_compare(&r1, &r2);
+ }
+ return (result);
+}
+
+/***
+ *** Conversions
+ ***/
+
+void
+dns_rdata_fromregion(dns_rdata_t *rdata, dns_rdataclass_t rdclass,
+ dns_rdatatype_t type, isc_region_t *r) {
+ REQUIRE(rdata != NULL);
+ REQUIRE(DNS_RDATA_INITIALIZED(rdata));
+ REQUIRE(r != NULL);
+
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+
+ rdata->data = r->base;
+ rdata->length = r->length;
+ rdata->rdclass = rdclass;
+ rdata->type = type;
+ rdata->flags = 0;
+}
+
+void
+dns_rdata_toregion(const dns_rdata_t *rdata, isc_region_t *r) {
+ REQUIRE(rdata != NULL);
+ REQUIRE(r != NULL);
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+
+ r->base = rdata->data;
+ r->length = rdata->length;
+}
+
+isc_result_t
+dns_rdata_fromwire(dns_rdata_t *rdata, dns_rdataclass_t rdclass,
+ dns_rdatatype_t type, isc_buffer_t *source,
+ dns_decompress_t *dctx, unsigned int options,
+ isc_buffer_t *target) {
+ isc_result_t result = ISC_R_NOTIMPLEMENTED;
+ isc_region_t region;
+ isc_buffer_t ss;
+ isc_buffer_t st;
+ bool use_default = false;
+ uint32_t activelength;
+ unsigned int length;
+
+ REQUIRE(dctx != NULL);
+ if (rdata != NULL) {
+ REQUIRE(DNS_RDATA_INITIALIZED(rdata));
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+ }
+ REQUIRE(source != NULL);
+ REQUIRE(target != NULL);
+
+ if (type == 0) {
+ return (DNS_R_FORMERR);
+ }
+
+ ss = *source;
+ st = *target;
+
+ activelength = isc_buffer_activelength(source);
+ INSIST(activelength < 65536);
+
+ FROMWIRESWITCH
+
+ if (use_default) {
+ if (activelength > isc_buffer_availablelength(target)) {
+ result = ISC_R_NOSPACE;
+ } else {
+ isc_buffer_putmem(target, isc_buffer_current(source),
+ activelength);
+ isc_buffer_forward(source, activelength);
+ result = ISC_R_SUCCESS;
+ }
+ }
+
+ /*
+ * Reject any rdata that expands out to more than DNS_RDATA_MAXLENGTH
+ * as we cannot transmit it.
+ */
+ length = isc_buffer_usedlength(target) - isc_buffer_usedlength(&st);
+ if (result == ISC_R_SUCCESS && length > DNS_RDATA_MAXLENGTH) {
+ result = DNS_R_FORMERR;
+ }
+
+ /*
+ * We should have consumed all of our buffer.
+ */
+ if (result == ISC_R_SUCCESS && !buffer_empty(source)) {
+ result = DNS_R_EXTRADATA;
+ }
+
+ if (rdata != NULL && result == ISC_R_SUCCESS) {
+ region.base = isc_buffer_used(&st);
+ region.length = length;
+ dns_rdata_fromregion(rdata, rdclass, type, &region);
+ }
+
+ if (result != ISC_R_SUCCESS) {
+ *source = ss;
+ *target = st;
+ }
+ return (result);
+}
+
+isc_result_t
+dns_rdata_towire(dns_rdata_t *rdata, dns_compress_t *cctx,
+ isc_buffer_t *target) {
+ isc_result_t result = ISC_R_NOTIMPLEMENTED;
+ bool use_default = false;
+ isc_region_t tr;
+ isc_buffer_t st;
+
+ REQUIRE(rdata != NULL);
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+
+ /*
+ * Some DynDNS meta-RRs have empty rdata.
+ */
+ if ((rdata->flags & DNS_RDATA_UPDATE) != 0) {
+ INSIST(rdata->length == 0);
+ return (ISC_R_SUCCESS);
+ }
+
+ st = *target;
+
+ TOWIRESWITCH
+
+ if (use_default) {
+ isc_buffer_availableregion(target, &tr);
+ if (tr.length < rdata->length) {
+ return (ISC_R_NOSPACE);
+ }
+ memmove(tr.base, rdata->data, rdata->length);
+ isc_buffer_add(target, rdata->length);
+ return (ISC_R_SUCCESS);
+ }
+ if (result != ISC_R_SUCCESS) {
+ *target = st;
+ INSIST(target->used < 65536);
+ dns_compress_rollback(cctx, (uint16_t)target->used);
+ }
+ return (result);
+}
+
+/*
+ * If the binary data in 'src' is valid uncompressed wire format
+ * rdata of class 'rdclass' and type 'type', return ISC_R_SUCCESS
+ * and copy the validated rdata to 'dest'. Otherwise return an error.
+ */
+static isc_result_t
+rdata_validate(isc_buffer_t *src, isc_buffer_t *dest, dns_rdataclass_t rdclass,
+ dns_rdatatype_t type) {
+ dns_decompress_t dctx;
+ isc_result_t result;
+
+ dns_decompress_init(&dctx, -1, DNS_DECOMPRESS_NONE);
+ isc_buffer_setactive(src, isc_buffer_usedlength(src));
+ result = dns_rdata_fromwire(NULL, rdclass, type, src, &dctx, 0, dest);
+ dns_decompress_invalidate(&dctx);
+
+ return (result);
+}
+
+static isc_result_t
+unknown_fromtext(dns_rdataclass_t rdclass, dns_rdatatype_t type,
+ isc_lex_t *lexer, isc_mem_t *mctx, isc_buffer_t *target) {
+ isc_result_t result;
+ isc_buffer_t *buf = NULL;
+ isc_token_t token;
+
+ if (type == 0 || dns_rdatatype_ismeta(type)) {
+ return (DNS_R_METATYPE);
+ }
+
+ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
+ false));
+ if (token.value.as_ulong > 65535U) {
+ return (ISC_R_RANGE);
+ }
+ isc_buffer_allocate(mctx, &buf, token.value.as_ulong);
+
+ if (token.value.as_ulong != 0U) {
+ result = isc_hex_tobuffer(lexer, buf,
+ (unsigned int)token.value.as_ulong);
+ if (result != ISC_R_SUCCESS) {
+ goto failure;
+ }
+ if (isc_buffer_usedlength(buf) != token.value.as_ulong) {
+ result = ISC_R_UNEXPECTEDEND;
+ goto failure;
+ }
+ }
+
+ if (dns_rdatatype_isknown(type)) {
+ result = rdata_validate(buf, target, rdclass, type);
+ } else {
+ isc_region_t r;
+ isc_buffer_usedregion(buf, &r);
+ result = isc_buffer_copyregion(target, &r);
+ }
+ if (result != ISC_R_SUCCESS) {
+ goto failure;
+ }
+
+ isc_buffer_free(&buf);
+ return (ISC_R_SUCCESS);
+
+failure:
+ isc_buffer_free(&buf);
+ return (result);
+}
+
+isc_result_t
+dns_rdata_fromtext(dns_rdata_t *rdata, dns_rdataclass_t rdclass,
+ dns_rdatatype_t type, isc_lex_t *lexer,
+ const dns_name_t *origin, unsigned int options,
+ isc_mem_t *mctx, isc_buffer_t *target,
+ dns_rdatacallbacks_t *callbacks) {
+ isc_result_t result = ISC_R_NOTIMPLEMENTED;
+ isc_region_t region;
+ isc_buffer_t st;
+ isc_token_t token;
+ unsigned int lexoptions = ISC_LEXOPT_EOL | ISC_LEXOPT_EOF |
+ ISC_LEXOPT_DNSMULTILINE | ISC_LEXOPT_ESCAPE;
+ char *name;
+ unsigned long line;
+ void (*callback)(dns_rdatacallbacks_t *, const char *, ...);
+ isc_result_t tresult;
+ unsigned int length;
+ bool unknown;
+
+ REQUIRE(origin == NULL || dns_name_isabsolute(origin));
+ if (rdata != NULL) {
+ REQUIRE(DNS_RDATA_INITIALIZED(rdata));
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+ }
+ if (callbacks != NULL) {
+ REQUIRE(callbacks->warn != NULL);
+ REQUIRE(callbacks->error != NULL);
+ }
+
+ st = *target;
+
+ if (callbacks != NULL) {
+ callback = callbacks->error;
+ } else {
+ callback = default_fromtext_callback;
+ }
+
+ result = isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring,
+ true);
+ if (result != ISC_R_SUCCESS) {
+ name = isc_lex_getsourcename(lexer);
+ line = isc_lex_getsourceline(lexer);
+ fromtext_error(callback, callbacks, name, line, NULL, result);
+ return (result);
+ }
+
+ unknown = false;
+ if (token.type == isc_tokentype_string &&
+ strcmp(DNS_AS_STR(token), "\\#") == 0)
+ {
+ /*
+ * If this is a TXT record '\#' could be a escaped '#'.
+ * Look to see if the next token is a number and if so
+ * treat it as a unknown record format.
+ */
+ if (type == dns_rdatatype_txt) {
+ result = isc_lex_getmastertoken(
+ lexer, &token, isc_tokentype_number, false);
+ if (result == ISC_R_SUCCESS) {
+ isc_lex_ungettoken(lexer, &token);
+ }
+ }
+
+ if (result == ISC_R_SUCCESS) {
+ unknown = true;
+ result = unknown_fromtext(rdclass, type, lexer, mctx,
+ target);
+ } else {
+ options |= DNS_RDATA_UNKNOWNESCAPE;
+ }
+ } else {
+ isc_lex_ungettoken(lexer, &token);
+ }
+
+ if (!unknown) {
+ FROMTEXTSWITCH
+
+ /*
+ * Consume to end of line / file.
+ * If not at end of line initially set error code.
+ * Call callback via fromtext_error once if there was an error.
+ */
+ }
+ do {
+ name = isc_lex_getsourcename(lexer);
+ line = isc_lex_getsourceline(lexer);
+ tresult = isc_lex_gettoken(lexer, lexoptions, &token);
+ if (tresult != ISC_R_SUCCESS) {
+ if (result == ISC_R_SUCCESS) {
+ result = tresult;
+ }
+ if (callback != NULL) {
+ fromtext_error(callback, callbacks, name, line,
+ NULL, result);
+ }
+ break;
+ } else if (token.type != isc_tokentype_eol &&
+ token.type != isc_tokentype_eof)
+ {
+ if (result == ISC_R_SUCCESS) {
+ result = DNS_R_EXTRATOKEN;
+ }
+ if (callback != NULL) {
+ fromtext_error(callback, callbacks, name, line,
+ &token, result);
+ callback = NULL;
+ }
+ } else if (result != ISC_R_SUCCESS && callback != NULL) {
+ fromtext_error(callback, callbacks, name, line, &token,
+ result);
+ break;
+ } else {
+ if (token.type == isc_tokentype_eof) {
+ fromtext_warneof(lexer, callbacks);
+ }
+ break;
+ }
+ } while (1);
+
+ length = isc_buffer_usedlength(target) - isc_buffer_usedlength(&st);
+ if (result == ISC_R_SUCCESS && length > DNS_RDATA_MAXLENGTH) {
+ result = ISC_R_NOSPACE;
+ }
+
+ if (rdata != NULL && result == ISC_R_SUCCESS) {
+ region.base = isc_buffer_used(&st);
+ region.length = length;
+ dns_rdata_fromregion(rdata, rdclass, type, &region);
+ }
+ if (result != ISC_R_SUCCESS) {
+ *target = st;
+ }
+ return (result);
+}
+
+static isc_result_t
+unknown_totext(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
+ isc_buffer_t *target) {
+ isc_result_t result;
+ char buf[sizeof("65535")];
+ isc_region_t sr;
+
+ strlcpy(buf, "\\# ", sizeof(buf));
+ result = str_totext(buf, target);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ dns_rdata_toregion(rdata, &sr);
+ INSIST(sr.length < 65536);
+ snprintf(buf, sizeof(buf), "%u", sr.length);
+ result = str_totext(buf, target);
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ if (sr.length != 0U) {
+ if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) {
+ result = str_totext(" ( ", target);
+ } else {
+ result = str_totext(" ", target);
+ }
+
+ if (result != ISC_R_SUCCESS) {
+ return (result);
+ }
+
+ if (tctx->width == 0) { /* No splitting */
+ result = isc_hex_totext(&sr, 0, "", target);
+ } else {
+ result = isc_hex_totext(&sr, tctx->width - 2,
+ tctx->linebreak, target);
+ }
+ if (result == ISC_R_SUCCESS &&
+ (tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
+ {
+ result = str_totext(" )", target);
+ }
+ }
+ return (result);
+}
+
+static isc_result_t
+rdata_totext(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
+ isc_buffer_t *target) {
+ isc_result_t result = ISC_R_NOTIMPLEMENTED;
+ bool use_default = false;
+ unsigned int cur;
+
+ REQUIRE(rdata != NULL);
+ REQUIRE(tctx->origin == NULL || dns_name_isabsolute(tctx->origin));
+
+ /*
+ * Some DynDNS meta-RRs have empty rdata.
+ */
+ if ((rdata->flags & DNS_RDATA_UPDATE) != 0) {
+ INSIST(rdata->length == 0);
+ return (ISC_R_SUCCESS);
+ }
+
+ if ((tctx->flags & DNS_STYLEFLAG_UNKNOWNFORMAT) != 0) {
+ return (unknown_totext(rdata, tctx, target));
+ }
+
+ cur = isc_buffer_usedlength(target);
+
+ TOTEXTSWITCH
+
+ if (use_default || (result == ISC_R_NOTIMPLEMENTED)) {
+ unsigned int u = isc_buffer_usedlength(target);
+
+ INSIST(u >= cur);
+ isc_buffer_subtract(target, u - cur);
+ result = unknown_totext(rdata, tctx, target);
+ }
+
+ return (result);
+}
+
+isc_result_t
+dns_rdata_totext(dns_rdata_t *rdata, const dns_name_t *origin,
+ isc_buffer_t *target) {
+ dns_rdata_textctx_t tctx;
+
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+
+ /*
+ * Set up formatting options for single-line output.
+ */
+ tctx.origin = origin;
+ tctx.flags = 0;
+ tctx.width = 60;
+ tctx.linebreak = " ";
+ return (rdata_totext(rdata, &tctx, target));
+}
+
+isc_result_t
+dns_rdata_tofmttext(dns_rdata_t *rdata, const dns_name_t *origin,
+ dns_masterstyle_flags_t flags, unsigned int width,
+ unsigned int split_width, const char *linebreak,
+ isc_buffer_t *target) {
+ dns_rdata_textctx_t tctx;
+
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+
+ /*
+ * Set up formatting options for formatted output.
+ */
+ tctx.origin = origin;
+ tctx.flags = flags;
+ if (split_width == 0xffffffff) {
+ tctx.width = width;
+ } else {
+ tctx.width = split_width;
+ }
+
+ if ((flags & DNS_STYLEFLAG_MULTILINE) != 0) {
+ tctx.linebreak = linebreak;
+ } else {
+ if (split_width == 0xffffffff) {
+ tctx.width = 60; /* Used for hex word length only. */
+ }
+ tctx.linebreak = " ";
+ }
+ return (rdata_totext(rdata, &tctx, target));
+}
+
+isc_result_t
+dns_rdata_fromstruct(dns_rdata_t *rdata, dns_rdataclass_t rdclass,
+ dns_rdatatype_t type, void *source, isc_buffer_t *target) {
+ isc_result_t result = ISC_R_NOTIMPLEMENTED;
+ isc_buffer_t st;
+ isc_region_t region;
+ bool use_default = false;
+ unsigned int length;
+
+ REQUIRE(source != NULL);
+ if (rdata != NULL) {
+ REQUIRE(DNS_RDATA_INITIALIZED(rdata));
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+ }
+
+ st = *target;
+
+ FROMSTRUCTSWITCH
+
+ if (use_default) {
+ (void)NULL;
+ }
+
+ length = isc_buffer_usedlength(target) - isc_buffer_usedlength(&st);
+ if (result == ISC_R_SUCCESS && length > DNS_RDATA_MAXLENGTH) {
+ result = ISC_R_NOSPACE;
+ }
+
+ if (rdata != NULL && result == ISC_R_SUCCESS) {
+ region.base = isc_buffer_used(&st);
+ region.length = length;
+ dns_rdata_fromregion(rdata, rdclass, type, &region);
+ }
+ if (result != ISC_R_SUCCESS) {
+ *target = st;
+ }
+ return (result);
+}
+
+isc_result_t
+dns_rdata_tostruct(const dns_rdata_t *rdata, void *target, isc_mem_t *mctx) {
+ isc_result_t result = ISC_R_NOTIMPLEMENTED;
+ bool use_default = false;
+
+ REQUIRE(rdata != NULL);
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+ REQUIRE((rdata->flags & DNS_RDATA_UPDATE) == 0);
+
+ TOSTRUCTSWITCH
+
+ if (use_default) {
+ (void)NULL;
+ }
+
+ return (result);
+}
+
+void
+dns_rdata_freestruct(void *source) {
+ dns_rdatacommon_t *common = source;
+ REQUIRE(common != NULL);
+
+ FREESTRUCTSWITCH
+}
+
+isc_result_t
+dns_rdata_additionaldata(dns_rdata_t *rdata, dns_additionaldatafunc_t add,
+ void *arg) {
+ isc_result_t result = ISC_R_NOTIMPLEMENTED;
+ bool use_default = false;
+
+ /*
+ * Call 'add' for each name and type from 'rdata' which is subject to
+ * additional section processing.
+ */
+
+ REQUIRE(rdata != NULL);
+ REQUIRE(add != NULL);
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+
+ ADDITIONALDATASWITCH
+
+ /* No additional processing for unknown types */
+ if (use_default) {
+ result = ISC_R_SUCCESS;
+ }
+
+ return (result);
+}
+
+isc_result_t
+dns_rdata_digest(dns_rdata_t *rdata, dns_digestfunc_t digest, void *arg) {
+ isc_result_t result = ISC_R_NOTIMPLEMENTED;
+ bool use_default = false;
+ isc_region_t r;
+
+ /*
+ * Send 'rdata' in DNSSEC canonical form to 'digest'.
+ */
+
+ REQUIRE(rdata != NULL);
+ REQUIRE(digest != NULL);
+ REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
+
+ DIGESTSWITCH
+
+ if (use_default) {
+ dns_rdata_toregion(rdata, &r);
+ result = (digest)(arg, &r);
+ }
+
+ return (result);
+}
+
+bool
+dns_rdata_checkowner(const dns_name_t *name, dns_rdataclass_t rdclass,
+ dns_rdatatype_t type, bool wildcard) {
+ bool result;
+
+ CHECKOWNERSWITCH
+ return (result);
+}
+
+bool
+dns_rdata_checknames(dns_rdata_t *rdata, const dns_name_t *owner,
+ dns_name_t *bad) {
+ bool result;
+
+ CHECKNAMESSWITCH
+ return (result);
+}
+
+unsigned int
+dns_rdatatype_attributes(dns_rdatatype_t type) {
+ RDATATYPE_ATTRIBUTE_SW
+ if (type >= (dns_rdatatype_t)128 && type <= (dns_rdatatype_t)255) {
+ return (DNS_RDATATYPEATTR_UNKNOWN | DNS_RDATATYPEATTR_META);
+ }
+ return (DNS_RDATATYPEATTR_UNKNOWN);
+}
+
+isc_result_t
+dns_rdatatype_fromtext(dns_rdatatype_t *typep, isc_textregion_t *source) {
+ unsigned int hash;
+ unsigned int n;
+ unsigned char a, b;
+
+ n = source->length;
+
+ if (n == 0) {
+ return (DNS_R_UNKNOWN);
+ }
+
+ a = tolower((unsigned char)source->base[0]);
+ b = tolower((unsigned char)source->base[n - 1]);
+
+ hash = ((a + n) * b) % 256;
+
+ /*
+ * This switch block is inlined via \#define, and will use "return"
+ * to return a result to the caller if it is a valid (known)
+ * rdatatype name.
+ */
+ RDATATYPE_FROMTEXT_SW(hash, source->base, n, typep);
+
+ if (source->length > 4 && source->length < (4 + sizeof("65000")) &&
+ strncasecmp("type", source->base, 4) == 0)
+ {
+ char buf[sizeof("65000")];
+ char *endp;
+ unsigned int val;
+
+ /*
+ * source->base is not required to be NUL terminated.
+ * Copy up to remaining bytes and NUL terminate.
+ */
+ snprintf(buf, sizeof(buf), "%.*s", (int)(source->length - 4),
+ source->base + 4);
+ val = strtoul(buf, &endp, 10);
+ if (*endp == '\0' && val <= 0xffff) {
+ *typep = (dns_rdatatype_t)val;
+ return (ISC_R_SUCCESS);
+ }
+ }
+
+ return (DNS_R_UNKNOWN);
+}
+
+isc_result_t
+dns_rdatatype_totext(dns_rdatatype_t type, isc_buffer_t *target) {
+ RDATATYPE_TOTEXT_SW
+
+ return (dns_rdatatype_tounknowntext(type, target));
+}
+
+isc_result_t
+dns_rdatatype_tounknowntext(dns_rdatatype_t type, isc_buffer_t *target) {
+ char buf[sizeof("TYPE65535")];
+
+ snprintf(buf, sizeof(buf), "TYPE%u", type);
+ return (str_totext(buf, target));
+}
+
+void
+dns_rdatatype_format(dns_rdatatype_t rdtype, char *array, unsigned int size) {
+ isc_result_t result;
+ isc_buffer_t buf;
+
+ if (size == 0U) {
+ return;
+ }
+
+ isc_buffer_init(&buf, array, size);
+ result = dns_rdatatype_totext(rdtype, &buf);
+ /*
+ * Null terminate.
+ */
+ if (result == ISC_R_SUCCESS) {
+ if (isc_buffer_availablelength(&buf) >= 1) {
+ isc_buffer_putuint8(&buf, 0);
+ } else {
+ result = ISC_R_NOSPACE;
+ }
+ }
+ if (result != ISC_R_SUCCESS) {
+ strlcpy(array, "<unknown>", size);
+ }
+}
+
+/*
+ * Private function.
+ */
+
+static unsigned int
+name_length(const dns_name_t *name) {
+ return (name->length);
+}
+
+static isc_result_t
+commatxt_totext(isc_region_t *source, bool quote, bool comma,
+ isc_buffer_t *target) {
+ unsigned int tl;
+ unsigned int n;
+ unsigned char *sp;
+ char *tp;
+ isc_region_t region;
+
+ isc_buffer_availableregion(target, &region);
+ sp = source->base;
+ tp = (char *)region.base;
+ tl = region.length;
+
+ n = *sp++;
+
+ REQUIRE(n + 1 <= source->length);
+ if (n == 0U) {
+ REQUIRE(quote);
+ }
+
+ if (quote) {
+ if (tl < 1) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = '"';
+ tl--;
+ }
+ while (n--) {
+ /*
+ * \DDD space (0x20) if not quoting.
+ */
+ if (*sp < (quote ? ' ' : '!') || *sp >= 0x7f) {
+ if (tl < 4) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = '\\';
+ *tp++ = '0' + ((*sp / 100) % 10);
+ *tp++ = '0' + ((*sp / 10) % 10);
+ *tp++ = '0' + (*sp % 10);
+ sp++;
+ tl -= 4;
+ continue;
+ }
+ /*
+ * Escape double quote and backslash. If we are not
+ * enclosing the string in double quotes, also escape
+ * at sign (@) and semicolon (;) unless comma is set.
+ * If comma is set, then only escape commas (,).
+ */
+ if (*sp == '"' || *sp == '\\' || (comma && *sp == ',') ||
+ (!comma && !quote && (*sp == '@' || *sp == ';')))
+ {
+ if (tl < 2) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = '\\';
+ tl--;
+ /*
+ * Perform comma escape processing.
+ * ',' => '\\,'
+ * '\' => '\\\\'
+ */
+ if (comma && (*sp == ',' || *sp == '\\')) {
+ if (tl < ((*sp == '\\') ? 3 : 2)) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = '\\';
+ tl--;
+ if (*sp == '\\') {
+ *tp++ = '\\';
+ tl--;
+ }
+ }
+ }
+ if (tl < 1) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = *sp++;
+ tl--;
+ }
+ if (quote) {
+ if (tl < 1) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = '"';
+ tl--;
+ POST(tl);
+ }
+ isc_buffer_add(target, (unsigned int)(tp - (char *)region.base));
+ isc_region_consume(source, *source->base + 1);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+txt_totext(isc_region_t *source, bool quote, isc_buffer_t *target) {
+ return (commatxt_totext(source, quote, false, target));
+}
+
+static isc_result_t
+commatxt_fromtext(isc_textregion_t *source, bool comma, isc_buffer_t *target) {
+ isc_region_t tregion;
+ bool escape = false, comma_escape = false, seen_comma = false;
+ unsigned int n, nrem;
+ char *s;
+ unsigned char *t;
+ int d;
+ int c;
+
+ isc_buffer_availableregion(target, &tregion);
+ s = source->base;
+ n = source->length;
+ t = tregion.base;
+ nrem = tregion.length;
+ if (nrem < 1) {
+ return (ISC_R_NOSPACE);
+ }
+ /*
+ * Length byte.
+ */
+ nrem--;
+ t++;
+ /*
+ * Maximum text string length.
+ */
+ if (nrem > 255) {
+ nrem = 255;
+ }
+ while (n-- != 0) {
+ c = (*s++) & 0xff;
+ if (escape && (d = decvalue((char)c)) != -1) {
+ c = d;
+ if (n == 0) {
+ return (DNS_R_SYNTAX);
+ }
+ n--;
+ if ((d = decvalue(*s++)) != -1) {
+ c = c * 10 + d;
+ } else {
+ return (DNS_R_SYNTAX);
+ }
+ if (n == 0) {
+ return (DNS_R_SYNTAX);
+ }
+ n--;
+ if ((d = decvalue(*s++)) != -1) {
+ c = c * 10 + d;
+ } else {
+ return (DNS_R_SYNTAX);
+ }
+ if (c > 255) {
+ return (DNS_R_SYNTAX);
+ }
+ } else if (!escape && c == '\\') {
+ escape = true;
+ continue;
+ }
+ escape = false;
+ /*
+ * Level 1 escape processing complete.
+ * If comma is set perform comma escape processing.
+ *
+ * Level 1 Level 2 ALPN's
+ * h1\,h2 => h1,h2 => h1 and h2
+ * h1\\,h2 => h1\,h2 => h1,h2
+ * h1\\h2 => h1\h2 => h1h2
+ * h1\\\\h2 => h1\\h2 => h1\h2
+ */
+ if (comma && !comma_escape && c == ',') {
+ seen_comma = true;
+ break;
+ }
+ if (comma && !comma_escape && c == '\\') {
+ comma_escape = true;
+ continue;
+ }
+ comma_escape = false;
+ if (nrem == 0) {
+ return ((tregion.length <= 256U) ? ISC_R_NOSPACE
+ : DNS_R_SYNTAX);
+ }
+ *t++ = c;
+ nrem--;
+ }
+
+ /*
+ * Incomplete escape processing?
+ */
+ if (escape || (comma && comma_escape)) {
+ return (DNS_R_SYNTAX);
+ }
+
+ if (comma) {
+ /*
+ * Disallow empty ALPN at start (",h1") or in the
+ * middle ("h1,,h2").
+ */
+ if (s == source->base || (seen_comma && s == source->base + 1))
+ {
+ return (DNS_R_SYNTAX);
+ }
+ isc_textregion_consume(source, s - source->base);
+ /*
+ * Disallow empty ALPN at end ("h1,").
+ */
+ if (seen_comma && source->length == 0) {
+ return (DNS_R_SYNTAX);
+ }
+ }
+ *tregion.base = (unsigned char)(t - tregion.base - 1);
+ isc_buffer_add(target, *tregion.base + 1);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+txt_fromtext(isc_textregion_t *source, isc_buffer_t *target) {
+ return (commatxt_fromtext(source, false, target));
+}
+
+static isc_result_t
+txt_fromwire(isc_buffer_t *source, isc_buffer_t *target) {
+ unsigned int n;
+ isc_region_t sregion;
+ isc_region_t tregion;
+
+ isc_buffer_activeregion(source, &sregion);
+ if (sregion.length == 0) {
+ return (ISC_R_UNEXPECTEDEND);
+ }
+ n = *sregion.base + 1;
+ if (n > sregion.length) {
+ return (ISC_R_UNEXPECTEDEND);
+ }
+
+ isc_buffer_availableregion(target, &tregion);
+ if (n > tregion.length) {
+ return (ISC_R_NOSPACE);
+ }
+
+ if (tregion.base != sregion.base) {
+ memmove(tregion.base, sregion.base, n);
+ }
+ isc_buffer_forward(source, n);
+ isc_buffer_add(target, n);
+ return (ISC_R_SUCCESS);
+}
+
+/*
+ * Conversion of TXT-like rdata fields without length limits.
+ */
+static isc_result_t
+multitxt_totext(isc_region_t *source, isc_buffer_t *target) {
+ unsigned int tl;
+ unsigned int n0, n;
+ unsigned char *sp;
+ char *tp;
+ isc_region_t region;
+
+ isc_buffer_availableregion(target, &region);
+ sp = source->base;
+ tp = (char *)region.base;
+ tl = region.length;
+
+ if (tl < 1) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = '"';
+ tl--;
+ do {
+ n = source->length;
+ n0 = source->length - 1;
+
+ while (n--) {
+ if (*sp < ' ' || *sp >= 0x7f) {
+ if (tl < 4) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = '\\';
+ *tp++ = '0' + ((*sp / 100) % 10);
+ *tp++ = '0' + ((*sp / 10) % 10);
+ *tp++ = '0' + (*sp % 10);
+ sp++;
+ tl -= 4;
+ continue;
+ }
+ /* double quote, backslash */
+ if (*sp == '"' || *sp == '\\') {
+ if (tl < 2) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = '\\';
+ tl--;
+ }
+ if (tl < 1) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = *sp++;
+ tl--;
+ }
+ isc_region_consume(source, n0 + 1);
+ } while (source->length != 0);
+ if (tl < 1) {
+ return (ISC_R_NOSPACE);
+ }
+ *tp++ = '"';
+ tl--;
+ POST(tl);
+ isc_buffer_add(target, (unsigned int)(tp - (char *)region.base));
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+multitxt_fromtext(isc_textregion_t *source, isc_buffer_t *target) {
+ isc_region_t tregion;
+ bool escape;
+ unsigned int n, nrem;
+ char *s;
+ unsigned char *t0, *t;
+ int d;
+ int c;
+
+ s = source->base;
+ n = source->length;
+ escape = false;
+
+ do {
+ isc_buffer_availableregion(target, &tregion);
+ t0 = t = tregion.base;
+ nrem = tregion.length;
+ if (nrem < 1) {
+ return (ISC_R_NOSPACE);
+ }
+
+ while (n != 0) {
+ --n;
+ c = (*s++) & 0xff;
+ if (escape && (d = decvalue((char)c)) != -1) {
+ c = d;
+ if (n == 0) {
+ return (DNS_R_SYNTAX);
+ }
+ n--;
+ if ((d = decvalue(*s++)) != -1) {
+ c = c * 10 + d;
+ } else {
+ return (DNS_R_SYNTAX);
+ }
+ if (n == 0) {
+ return (DNS_R_SYNTAX);
+ }
+ n--;
+ if ((d = decvalue(*s++)) != -1) {
+ c = c * 10 + d;
+ } else {
+ return (DNS_R_SYNTAX);
+ }
+ if (c > 255) {
+ return (DNS_R_SYNTAX);
+ }
+ } else if (!escape && c == '\\') {
+ escape = true;
+ continue;
+ }
+ escape = false;
+ *t++ = c;
+ nrem--;
+ if (nrem == 0) {
+ break;
+ }
+ }
+ if (escape) {
+ return (DNS_R_SYNTAX);
+ }
+
+ isc_buffer_add(target, (unsigned int)(t - t0));
+ } while (n != 0);
+ return (ISC_R_SUCCESS);
+}
+
+static bool
+name_prefix(dns_name_t *name, const dns_name_t *origin, dns_name_t *target) {
+ int l1, l2;
+
+ if (origin == NULL) {
+ goto return_false;
+ }
+
+ if (dns_name_compare(origin, dns_rootname) == 0) {
+ goto return_false;
+ }
+
+ if (!dns_name_issubdomain(name, origin)) {
+ goto return_false;
+ }
+
+ l1 = dns_name_countlabels(name);
+ l2 = dns_name_countlabels(origin);
+
+ if (l1 == l2) {
+ goto return_false;
+ }
+
+ /* Master files should be case preserving. */
+ dns_name_getlabelsequence(name, l1 - l2, l2, target);
+ if (!dns_name_caseequal(origin, target)) {
+ goto return_false;
+ }
+
+ dns_name_getlabelsequence(name, 0, l1 - l2, target);
+ return (true);
+
+return_false:
+ *target = *name;
+ return (false);
+}
+
+static isc_result_t
+str_totext(const char *source, isc_buffer_t *target) {
+ unsigned int l;
+ isc_region_t region;
+
+ isc_buffer_availableregion(target, &region);
+ l = strlen(source);
+
+ if (l > region.length) {
+ return (ISC_R_NOSPACE);
+ }
+
+ memmove(region.base, source, l);
+ isc_buffer_add(target, l);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+inet_totext(int af, uint32_t flags, isc_region_t *src, isc_buffer_t *target) {
+ char tmpbuf[64];
+
+ /* Note - inet_ntop doesn't do size checking on its input. */
+ if (inet_ntop(af, src->base, tmpbuf, sizeof(tmpbuf)) == NULL) {
+ return (ISC_R_NOSPACE);
+ }
+ if (strlen(tmpbuf) > isc_buffer_availablelength(target)) {
+ return (ISC_R_NOSPACE);
+ }
+ isc_buffer_putstr(target, tmpbuf);
+
+ /*
+ * An IPv6 address ending in "::" breaks YAML
+ * parsing, so append 0 in that case.
+ */
+ if (af == AF_INET6 && (flags & DNS_STYLEFLAG_YAML) != 0) {
+ isc_region_t r;
+ isc_buffer_usedregion(target, &r);
+ if (r.length > 0 && r.base[r.length - 1] == ':') {
+ if (isc_buffer_availablelength(target) == 0) {
+ return (ISC_R_NOSPACE);
+ }
+ isc_buffer_putmem(target, (const unsigned char *)"0",
+ 1);
+ }
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+static bool
+buffer_empty(isc_buffer_t *source) {
+ return ((source->current == source->active) ? true : false);
+}
+
+static void
+buffer_fromregion(isc_buffer_t *buffer, isc_region_t *region) {
+ isc_buffer_init(buffer, region->base, region->length);
+ isc_buffer_add(buffer, region->length);
+ isc_buffer_setactive(buffer, region->length);
+}
+
+static isc_result_t
+uint32_tobuffer(uint32_t value, isc_buffer_t *target) {
+ isc_region_t region;
+
+ isc_buffer_availableregion(target, &region);
+ if (region.length < 4) {
+ return (ISC_R_NOSPACE);
+ }
+ isc_buffer_putuint32(target, value);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+uint16_tobuffer(uint32_t value, isc_buffer_t *target) {
+ isc_region_t region;
+
+ if (value > 0xffff) {
+ return (ISC_R_RANGE);
+ }
+ isc_buffer_availableregion(target, &region);
+ if (region.length < 2) {
+ return (ISC_R_NOSPACE);
+ }
+ isc_buffer_putuint16(target, (uint16_t)value);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+uint8_tobuffer(uint32_t value, isc_buffer_t *target) {
+ isc_region_t region;
+
+ if (value > 0xff) {
+ return (ISC_R_RANGE);
+ }
+ isc_buffer_availableregion(target, &region);
+ if (region.length < 1) {
+ return (ISC_R_NOSPACE);
+ }
+ isc_buffer_putuint8(target, (uint8_t)value);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+name_tobuffer(const dns_name_t *name, isc_buffer_t *target) {
+ isc_region_t r;
+ dns_name_toregion(name, &r);
+ return (isc_buffer_copyregion(target, &r));
+}
+
+static uint32_t
+uint32_fromregion(isc_region_t *region) {
+ uint32_t value;
+
+ REQUIRE(region->length >= 4);
+ value = (uint32_t)region->base[0] << 24;
+ value |= (uint32_t)region->base[1] << 16;
+ value |= (uint32_t)region->base[2] << 8;
+ value |= (uint32_t)region->base[3];
+ return (value);
+}
+
+static uint16_t
+uint16_consume_fromregion(isc_region_t *region) {
+ uint16_t r = uint16_fromregion(region);
+
+ isc_region_consume(region, 2);
+ return (r);
+}
+
+static uint16_t
+uint16_fromregion(isc_region_t *region) {
+ REQUIRE(region->length >= 2);
+
+ return ((region->base[0] << 8) | region->base[1]);
+}
+
+static uint8_t
+uint8_fromregion(isc_region_t *region) {
+ REQUIRE(region->length >= 1);
+
+ return (region->base[0]);
+}
+
+static uint8_t
+uint8_consume_fromregion(isc_region_t *region) {
+ uint8_t r = uint8_fromregion(region);
+
+ isc_region_consume(region, 1);
+ return (r);
+}
+
+static isc_result_t
+mem_tobuffer(isc_buffer_t *target, void *base, unsigned int length) {
+ isc_region_t tr;
+
+ if (length == 0U) {
+ return (ISC_R_SUCCESS);
+ }
+
+ isc_buffer_availableregion(target, &tr);
+ if (length > tr.length) {
+ return (ISC_R_NOSPACE);
+ }
+ if (tr.base != base) {
+ memmove(tr.base, base, length);
+ }
+ isc_buffer_add(target, length);
+ return (ISC_R_SUCCESS);
+}
+
+static int
+hexvalue(char value) {
+ const char *s;
+ unsigned char c;
+
+ c = (unsigned char)value;
+
+ if (!isascii(c)) {
+ return (-1);
+ }
+ if (isupper(c)) {
+ c = tolower(c);
+ }
+ if ((s = strchr(hexdigits, c)) == NULL) {
+ return (-1);
+ }
+ return ((int)(s - hexdigits));
+}
+
+static int
+decvalue(char value) {
+ const char *s;
+
+ /*
+ * isascii() is valid for full range of int values, no need to
+ * mask or cast.
+ */
+ if (!isascii(value)) {
+ return (-1);
+ }
+ if ((s = strchr(decdigits, value)) == NULL) {
+ return (-1);
+ }
+ return ((int)(s - decdigits));
+}
+
+static void
+default_fromtext_callback(dns_rdatacallbacks_t *callbacks, const char *fmt,
+ ...) {
+ va_list ap;
+
+ UNUSED(callbacks);
+
+ va_start(ap, fmt);
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+ fprintf(stderr, "\n");
+}
+
+static void
+fromtext_warneof(isc_lex_t *lexer, dns_rdatacallbacks_t *callbacks) {
+ if (isc_lex_isfile(lexer) && callbacks != NULL) {
+ const char *name = isc_lex_getsourcename(lexer);
+ if (name == NULL) {
+ name = "UNKNOWN";
+ }
+ (*callbacks->warn)(callbacks,
+ "%s:%lu: file does not end with newline",
+ name, isc_lex_getsourceline(lexer));
+ }
+}
+
+static void
+warn_badmx(isc_token_t *token, isc_lex_t *lexer,
+ dns_rdatacallbacks_t *callbacks) {
+ const char *file;
+ unsigned long line;
+
+ if (lexer != NULL) {
+ file = isc_lex_getsourcename(lexer);
+ line = isc_lex_getsourceline(lexer);
+ (*callbacks->warn)(callbacks, "%s:%u: warning: '%s': %s", file,
+ line, DNS_AS_STR(*token),
+ dns_result_totext(DNS_R_MXISADDRESS));
+ }
+}
+
+static void
+warn_badname(const dns_name_t *name, isc_lex_t *lexer,
+ dns_rdatacallbacks_t *callbacks) {
+ const char *file;
+ unsigned long line;
+ char namebuf[DNS_NAME_FORMATSIZE];
+
+ if (lexer != NULL) {
+ file = isc_lex_getsourcename(lexer);
+ line = isc_lex_getsourceline(lexer);
+ dns_name_format(name, namebuf, sizeof(namebuf));
+ (*callbacks->warn)(callbacks, "%s:%u: warning: %s: %s", file,
+ line, namebuf,
+ dns_result_totext(DNS_R_BADNAME));
+ }
+}
+
+static void
+fromtext_error(void (*callback)(dns_rdatacallbacks_t *, const char *, ...),
+ dns_rdatacallbacks_t *callbacks, const char *name,
+ unsigned long line, isc_token_t *token, isc_result_t result) {
+ if (name == NULL) {
+ name = "UNKNOWN";
+ }
+
+ if (token != NULL) {
+ switch (token->type) {
+ case isc_tokentype_eol:
+ (*callback)(callbacks, "%s: %s:%lu: near eol: %s",
+ "dns_rdata_fromtext", name, line,
+ dns_result_totext(result));
+ break;
+ case isc_tokentype_eof:
+ (*callback)(callbacks, "%s: %s:%lu: near eof: %s",
+ "dns_rdata_fromtext", name, line,
+ dns_result_totext(result));
+ break;
+ case isc_tokentype_number:
+ (*callback)(callbacks, "%s: %s:%lu: near %lu: %s",
+ "dns_rdata_fromtext", name, line,
+ token->value.as_ulong,
+ dns_result_totext(result));
+ break;
+ case isc_tokentype_string:
+ case isc_tokentype_qstring:
+ (*callback)(callbacks, "%s: %s:%lu: near '%s': %s",
+ "dns_rdata_fromtext", name, line,
+ DNS_AS_STR(*token),
+ dns_result_totext(result));
+ break;
+ default:
+ (*callback)(callbacks, "%s: %s:%lu: %s",
+ "dns_rdata_fromtext", name, line,
+ dns_result_totext(result));
+ break;
+ }
+ } else {
+ (*callback)(callbacks, "dns_rdata_fromtext: %s:%lu: %s", name,
+ line, dns_result_totext(result));
+ }
+}
+
+dns_rdatatype_t
+dns_rdata_covers(dns_rdata_t *rdata) {
+ if (rdata->type == dns_rdatatype_rrsig) {
+ return (covers_rrsig(rdata));
+ }
+ return (covers_sig(rdata));
+}
+
+bool
+dns_rdatatype_ismeta(dns_rdatatype_t type) {
+ if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_META) != 0) {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+dns_rdatatype_issingleton(dns_rdatatype_t type) {
+ if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_SINGLETON) != 0)
+ {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+dns_rdatatype_notquestion(dns_rdatatype_t type) {
+ if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_NOTQUESTION) !=
+ 0)
+ {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+dns_rdatatype_questiononly(dns_rdatatype_t type) {
+ if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_QUESTIONONLY) !=
+ 0)
+ {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+dns_rdatatype_atcname(dns_rdatatype_t type) {
+ if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_ATCNAME) != 0) {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+dns_rdatatype_atparent(dns_rdatatype_t type) {
+ if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_ATPARENT) != 0)
+ {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+dns_rdatatype_followadditional(dns_rdatatype_t type) {
+ if ((dns_rdatatype_attributes(type) &
+ DNS_RDATATYPEATTR_FOLLOWADDITIONAL) != 0)
+ {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+dns_rdataclass_ismeta(dns_rdataclass_t rdclass) {
+ if (rdclass == dns_rdataclass_reserved0 ||
+ rdclass == dns_rdataclass_none || rdclass == dns_rdataclass_any)
+ {
+ return (true);
+ }
+
+ return (false); /* Assume it is not a meta class. */
+}
+
+bool
+dns_rdatatype_isdnssec(dns_rdatatype_t type) {
+ if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_DNSSEC) != 0) {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+dns_rdatatype_iszonecutauth(dns_rdatatype_t type) {
+ if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_ZONECUTAUTH) !=
+ 0)
+ {
+ return (true);
+ }
+ return (false);
+}
+
+bool
+dns_rdatatype_isknown(dns_rdatatype_t type) {
+ if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_UNKNOWN) == 0) {
+ return (true);
+ }
+ return (false);
+}
+
+void
+dns_rdata_exists(dns_rdata_t *rdata, dns_rdatatype_t type) {
+ REQUIRE(rdata != NULL);
+ REQUIRE(DNS_RDATA_INITIALIZED(rdata));
+
+ rdata->data = NULL;
+ rdata->length = 0;
+ rdata->flags = DNS_RDATA_UPDATE;
+ rdata->type = type;
+ rdata->rdclass = dns_rdataclass_any;
+}
+
+void
+dns_rdata_notexist(dns_rdata_t *rdata, dns_rdatatype_t type) {
+ REQUIRE(rdata != NULL);
+ REQUIRE(DNS_RDATA_INITIALIZED(rdata));
+
+ rdata->data = NULL;
+ rdata->length = 0;
+ rdata->flags = DNS_RDATA_UPDATE;
+ rdata->type = type;
+ rdata->rdclass = dns_rdataclass_none;
+}
+
+void
+dns_rdata_deleterrset(dns_rdata_t *rdata, dns_rdatatype_t type) {
+ REQUIRE(rdata != NULL);
+ REQUIRE(DNS_RDATA_INITIALIZED(rdata));
+
+ rdata->data = NULL;
+ rdata->length = 0;
+ rdata->flags = DNS_RDATA_UPDATE;
+ rdata->type = type;
+ rdata->rdclass = dns_rdataclass_any;
+}
+
+void
+dns_rdata_makedelete(dns_rdata_t *rdata) {
+ REQUIRE(rdata != NULL);
+
+ rdata->rdclass = dns_rdataclass_none;
+}
+
+const char *
+dns_rdata_updateop(dns_rdata_t *rdata, dns_section_t section) {
+ REQUIRE(rdata != NULL);
+ REQUIRE(DNS_RDATA_INITIALIZED(rdata));
+
+ switch (section) {
+ case DNS_SECTION_PREREQUISITE:
+ switch (rdata->rdclass) {
+ case dns_rdataclass_none:
+ switch (rdata->type) {
+ case dns_rdatatype_any:
+ return ("domain doesn't exist");
+ default:
+ return ("rrset doesn't exist");
+ }
+ case dns_rdataclass_any:
+ switch (rdata->type) {
+ case dns_rdatatype_any:
+ return ("domain exists");
+ default:
+ return ("rrset exists (value independent)");
+ }
+ default:
+ return ("rrset exists (value dependent)");
+ }
+ case DNS_SECTION_UPDATE:
+ switch (rdata->rdclass) {
+ case dns_rdataclass_none:
+ return ("delete");
+ case dns_rdataclass_any:
+ switch (rdata->type) {
+ case dns_rdatatype_any:
+ return ("delete all rrsets");
+ default:
+ return ("delete rrset");
+ }
+ default:
+ return ("add");
+ }
+ }
+ return ("invalid");
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 00:23:23 +0000