/* $NetBSD: txt_16.c,v 1.1.4.2 2024/02/29 11:38:56 martin Exp $ */ /* * 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. */ #ifndef RDATA_GENERIC_TXT_16_C #define RDATA_GENERIC_TXT_16_C #define RRTYPE_TXT_ATTRIBUTES (0) static isc_result_t generic_fromtext_txt(ARGS_FROMTEXT) { isc_token_t token; int strings; UNUSED(type); UNUSED(rdclass); UNUSED(origin); UNUSED(options); UNUSED(callbacks); strings = 0; if ((options & DNS_RDATA_UNKNOWNESCAPE) != 0) { isc_textregion_t r; DE_CONST("#", r.base); r.length = 1; RETERR(txt_fromtext(&r, target)); strings++; } for (;;) { RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring, true)); if (token.type != isc_tokentype_qstring && token.type != isc_tokentype_string) { break; } RETTOK(txt_fromtext(&token.value.as_textregion, target)); strings++; } /* Let upper layer handle eol/eof. */ isc_lex_ungettoken(lexer, &token); return (strings == 0 ? ISC_R_UNEXPECTEDEND : ISC_R_SUCCESS); } static isc_result_t generic_totext_txt(ARGS_TOTEXT) { isc_region_t region; UNUSED(tctx); dns_rdata_toregion(rdata, ®ion); while (region.length > 0) { RETERR(txt_totext(®ion, true, target)); if (region.length > 0) { RETERR(str_totext(" ", target)); } } return (ISC_R_SUCCESS); } static isc_result_t generic_fromwire_txt(ARGS_FROMWIRE) { isc_result_t result; UNUSED(type); UNUSED(dctx); UNUSED(rdclass); UNUSED(options); do { result = txt_fromwire(source, target); if (result != ISC_R_SUCCESS) { return (result); } } while (!buffer_empty(source)); return (ISC_R_SUCCESS); } static isc_result_t fromtext_txt(ARGS_FROMTEXT) { REQUIRE(type == dns_rdatatype_txt); return (generic_fromtext_txt(CALL_FROMTEXT)); } static isc_result_t totext_txt(ARGS_TOTEXT) { REQUIRE(rdata != NULL); REQUIRE(rdata->type == dns_rdatatype_txt); return (generic_totext_txt(CALL_TOTEXT)); } static isc_result_t fromwire_txt(ARGS_FROMWIRE) { REQUIRE(type == dns_rdatatype_txt); return (generic_fromwire_txt(CALL_FROMWIRE)); } static isc_result_t towire_txt(ARGS_TOWIRE) { REQUIRE(rdata->type == dns_rdatatype_txt); UNUSED(cctx); return (mem_tobuffer(target, rdata->data, rdata->length)); } static int compare_txt(ARGS_COMPARE) { isc_region_t r1; isc_region_t r2; REQUIRE(rdata1->type == rdata2->type); REQUIRE(rdata1->rdclass == rdata2->rdclass); REQUIRE(rdata1->type == dns_rdatatype_txt); dns_rdata_toregion(rdata1, &r1); dns_rdata_toregion(rdata2, &r2); return (isc_region_compare(&r1, &r2)); } static isc_result_t generic_fromstruct_txt(ARGS_FROMSTRUCT) { dns_rdata_txt_t *txt = source; isc_region_t region; uint8_t length; REQUIRE(txt != NULL); REQUIRE(txt->common.rdtype == type); REQUIRE(txt->common.rdclass == rdclass); REQUIRE(txt->txt != NULL && txt->txt_len != 0); UNUSED(type); UNUSED(rdclass); region.base = txt->txt; region.length = txt->txt_len; while (region.length > 0) { length = uint8_fromregion(®ion); isc_region_consume(®ion, 1); if (region.length < length) { return (ISC_R_UNEXPECTEDEND); } isc_region_consume(®ion, length); } return (mem_tobuffer(target, txt->txt, txt->txt_len)); } static isc_result_t generic_tostruct_txt(ARGS_TOSTRUCT) { dns_rdata_txt_t *txt = target; isc_region_t r; REQUIRE(txt != NULL); REQUIRE(txt->common.rdclass == rdata->rdclass); REQUIRE(txt->common.rdtype == rdata->type); REQUIRE(!ISC_LINK_LINKED(&txt->common, link)); dns_rdata_toregion(rdata, &r); txt->txt_len = r.length; txt->txt = mem_maybedup(mctx, r.base, r.length); if (txt->txt == NULL) { return (ISC_R_NOMEMORY); } txt->offset = 0; txt->mctx = mctx; return (ISC_R_SUCCESS); } static void generic_freestruct_txt(ARGS_FREESTRUCT) { dns_rdata_txt_t *txt = source; REQUIRE(txt != NULL); if (txt->mctx == NULL) { return; } if (txt->txt != NULL) { isc_mem_free(txt->mctx, txt->txt); } txt->mctx = NULL; } static isc_result_t fromstruct_txt(ARGS_FROMSTRUCT) { REQUIRE(type == dns_rdatatype_txt); return (generic_fromstruct_txt(CALL_FROMSTRUCT)); } static isc_result_t tostruct_txt(ARGS_TOSTRUCT) { dns_rdata_txt_t *txt = target; REQUIRE(rdata->type == dns_rdatatype_txt); REQUIRE(txt != NULL); txt->common.rdclass = rdata->rdclass; txt->common.rdtype = rdata->type; ISC_LINK_INIT(&txt->common, link); return (generic_tostruct_txt(CALL_TOSTRUCT)); } static void freestruct_txt(ARGS_FREESTRUCT) { dns_rdata_txt_t *txt = source; REQUIRE(txt != NULL); REQUIRE(txt->common.rdtype == dns_rdatatype_txt); generic_freestruct_txt(source); } static isc_result_t additionaldata_txt(ARGS_ADDLDATA) { REQUIRE(rdata->type == dns_rdatatype_txt); UNUSED(rdata); UNUSED(add); UNUSED(arg); return (ISC_R_SUCCESS); } static isc_result_t digest_txt(ARGS_DIGEST) { isc_region_t r; REQUIRE(rdata->type == dns_rdatatype_txt); dns_rdata_toregion(rdata, &r); return ((digest)(arg, &r)); } static bool checkowner_txt(ARGS_CHECKOWNER) { REQUIRE(type == dns_rdatatype_txt); UNUSED(name); UNUSED(type); UNUSED(rdclass); UNUSED(wildcard); return (true); } static bool checknames_txt(ARGS_CHECKNAMES) { REQUIRE(rdata->type == dns_rdatatype_txt); UNUSED(rdata); UNUSED(owner); UNUSED(bad); return (true); } static int casecompare_txt(ARGS_COMPARE) { return (compare_txt(rdata1, rdata2)); } static isc_result_t generic_txt_first(dns_rdata_txt_t *txt) { REQUIRE(txt != NULL); REQUIRE(txt->txt != NULL || txt->txt_len == 0); if (txt->txt_len == 0) { return (ISC_R_NOMORE); } txt->offset = 0; return (ISC_R_SUCCESS); } static isc_result_t generic_txt_next(dns_rdata_txt_t *txt) { isc_region_t r; uint8_t length; REQUIRE(txt != NULL); REQUIRE(txt->txt != NULL && txt->txt_len != 0); INSIST(txt->offset + 1 <= txt->txt_len); r.base = txt->txt + txt->offset; r.length = txt->txt_len - txt->offset; length = uint8_fromregion(&r); INSIST(txt->offset + 1 + length <= txt->txt_len); txt->offset = txt->offset + 1 + length; if (txt->offset == txt->txt_len) { return (ISC_R_NOMORE); } return (ISC_R_SUCCESS); } static isc_result_t generic_txt_current(dns_rdata_txt_t *txt, dns_rdata_txt_string_t *string) { isc_region_t r; REQUIRE(txt != NULL); REQUIRE(string != NULL); REQUIRE(txt->txt != NULL); REQUIRE(txt->offset < txt->txt_len); INSIST(txt->offset + 1 <= txt->txt_len); r.base = txt->txt + txt->offset; r.length = txt->txt_len - txt->offset; string->length = uint8_fromregion(&r); isc_region_consume(&r, 1); string->data = r.base; INSIST(txt->offset + 1 + string->length <= txt->txt_len); return (ISC_R_SUCCESS); } isc_result_t dns_rdata_txt_first(dns_rdata_txt_t *txt) { REQUIRE(txt != NULL); REQUIRE(txt->common.rdtype == dns_rdatatype_txt); return (generic_txt_first(txt)); } isc_result_t dns_rdata_txt_next(dns_rdata_txt_t *txt) { REQUIRE(txt != NULL); REQUIRE(txt->common.rdtype == dns_rdatatype_txt); return (generic_txt_next(txt)); } isc_result_t dns_rdata_txt_current(dns_rdata_txt_t *txt, dns_rdata_txt_string_t *string) { REQUIRE(txt != NULL); REQUIRE(txt->common.rdtype == dns_rdatatype_txt); return (generic_txt_current(txt, string)); } #endif /* RDATA_GENERIC_TXT_16_C */