version 1.3.2.1, 2019/01/09 16:55:13 |
version 1.3.2.2, 2019/06/10 22:04:38 |
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/* $NetBSD$ */ |
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/* |
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC") |
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* |
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* This Source Code Form is subject to the terms of the Mozilla Public |
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* License, v. 2.0. If a copy of the MPL was not distributed with this |
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. |
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* |
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* See the COPYRIGHT file distributed with this work for additional |
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* information regarding copyright ownership. |
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*/ |
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/* RFC2915 */ |
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#ifndef RDATA_GENERIC_NAPTR_35_C |
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#define RDATA_GENERIC_NAPTR_35_C |
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#define RRTYPE_NAPTR_ATTRIBUTES (0) |
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#include <isc/regex.h> |
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/* |
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* Check the wire format of the Regexp field. |
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* Don't allow embeded NUL's. |
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*/ |
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static inline isc_result_t |
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txt_valid_regex(const unsigned char *txt) { |
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unsigned int nsub = 0; |
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char regex[256]; |
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char *cp; |
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bool flags = false; |
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bool replace = false; |
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unsigned char c; |
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unsigned char delim; |
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unsigned int len; |
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int n; |
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len = *txt++; |
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if (len == 0U) |
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return (ISC_R_SUCCESS); |
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delim = *txt++; |
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len--; |
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/* |
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* Digits, backslash and flags can't be delimiters. |
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*/ |
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switch (delim) { |
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case '0': case '1': case '2': case '3': case '4': |
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case '5': case '6': case '7': case '8': case '9': |
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case '\\': case 'i': case 0: |
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return (DNS_R_SYNTAX); |
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} |
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cp = regex; |
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while (len-- > 0) { |
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c = *txt++; |
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if (c == 0) |
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return (DNS_R_SYNTAX); |
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if (c == delim && !replace) { |
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replace = true; |
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continue; |
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} else if (c == delim && !flags) { |
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flags = true; |
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continue; |
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} else if (c == delim) |
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return (DNS_R_SYNTAX); |
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/* |
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* Flags are not escaped. |
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*/ |
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if (flags) { |
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switch (c) { |
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case 'i': |
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continue; |
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default: |
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return (DNS_R_SYNTAX); |
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} |
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} |
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if (!replace) |
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*cp++ = c; |
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if (c == '\\') { |
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if (len == 0) |
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return (DNS_R_SYNTAX); |
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c = *txt++; |
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if (c == 0) |
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return (DNS_R_SYNTAX); |
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len--; |
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if (replace) |
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switch (c) { |
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case '0': return (DNS_R_SYNTAX); |
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case '1': if (nsub < 1) nsub = 1; break; |
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case '2': if (nsub < 2) nsub = 2; break; |
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case '3': if (nsub < 3) nsub = 3; break; |
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case '4': if (nsub < 4) nsub = 4; break; |
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case '5': if (nsub < 5) nsub = 5; break; |
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case '6': if (nsub < 6) nsub = 6; break; |
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case '7': if (nsub < 7) nsub = 7; break; |
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case '8': if (nsub < 8) nsub = 8; break; |
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case '9': if (nsub < 9) nsub = 9; break; |
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} |
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if (!replace) |
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*cp++ = c; |
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} |
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} |
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if (!flags) |
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return (DNS_R_SYNTAX); |
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*cp = '\0'; |
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n = isc_regex_validate(regex); |
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if (n < 0 || nsub > (unsigned int)n) |
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return (DNS_R_SYNTAX); |
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return (ISC_R_SUCCESS); |
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} |
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static inline isc_result_t |
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fromtext_naptr(ARGS_FROMTEXT) { |
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isc_token_t token; |
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dns_name_t name; |
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isc_buffer_t buffer; |
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unsigned char *regex; |
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REQUIRE(type == dns_rdatatype_naptr); |
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UNUSED(type); |
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UNUSED(rdclass); |
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UNUSED(callbacks); |
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/* |
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* Order. |
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*/ |
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RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, |
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false)); |
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if (token.value.as_ulong > 0xffffU) |
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RETTOK(ISC_R_RANGE); |
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RETERR(uint16_tobuffer(token.value.as_ulong, target)); |
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/* |
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* Preference. |
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*/ |
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RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, |
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false)); |
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if (token.value.as_ulong > 0xffffU) |
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RETTOK(ISC_R_RANGE); |
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RETERR(uint16_tobuffer(token.value.as_ulong, target)); |
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/* |
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* Flags. |
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*/ |
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RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring, |
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false)); |
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RETTOK(txt_fromtext(&token.value.as_textregion, target)); |
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/* |
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* Service. |
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*/ |
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RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring, |
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false)); |
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RETTOK(txt_fromtext(&token.value.as_textregion, target)); |
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/* |
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* Regexp. |
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*/ |
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regex = isc_buffer_used(target); |
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RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring, |
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false)); |
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RETTOK(txt_fromtext(&token.value.as_textregion, target)); |
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RETTOK(txt_valid_regex(regex)); |
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/* |
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* Replacement. |
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*/ |
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RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, |
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false)); |
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dns_name_init(&name, NULL); |
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buffer_fromregion(&buffer, &token.value.as_region); |
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if (origin == NULL) |
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origin = dns_rootname; |
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RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target)); |
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return (ISC_R_SUCCESS); |
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} |
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static inline isc_result_t |
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totext_naptr(ARGS_TOTEXT) { |
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isc_region_t region; |
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dns_name_t name; |
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dns_name_t prefix; |
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bool sub; |
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char buf[sizeof("64000")]; |
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unsigned short num; |
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REQUIRE(rdata->type == dns_rdatatype_naptr); |
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REQUIRE(rdata->length != 0); |
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dns_name_init(&name, NULL); |
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dns_name_init(&prefix, NULL); |
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dns_rdata_toregion(rdata, ®ion); |
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/* |
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* Order. |
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*/ |
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num = uint16_fromregion(®ion); |
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isc_region_consume(®ion, 2); |
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snprintf(buf, sizeof(buf), "%u", num); |
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RETERR(str_totext(buf, target)); |
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RETERR(str_totext(" ", target)); |
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/* |
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* Preference. |
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*/ |
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num = uint16_fromregion(®ion); |
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isc_region_consume(®ion, 2); |
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snprintf(buf, sizeof(buf), "%u", num); |
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RETERR(str_totext(buf, target)); |
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RETERR(str_totext(" ", target)); |
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/* |
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* Flags. |
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*/ |
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RETERR(txt_totext(®ion, true, target)); |
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RETERR(str_totext(" ", target)); |
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/* |
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* Service. |
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*/ |
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RETERR(txt_totext(®ion, true, target)); |
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RETERR(str_totext(" ", target)); |
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/* |
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* Regexp. |
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*/ |
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RETERR(txt_totext(®ion, true, target)); |
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RETERR(str_totext(" ", target)); |
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/* |
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* Replacement. |
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*/ |
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dns_name_fromregion(&name, ®ion); |
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sub = name_prefix(&name, tctx->origin, &prefix); |
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return (dns_name_totext(&prefix, sub, target)); |
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} |
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static inline isc_result_t |
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fromwire_naptr(ARGS_FROMWIRE) { |
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dns_name_t name; |
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isc_region_t sr; |
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unsigned char *regex; |
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REQUIRE(type == dns_rdatatype_naptr); |
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UNUSED(type); |
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UNUSED(rdclass); |
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dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE); |
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dns_name_init(&name, NULL); |
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/* |
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* Order, preference. |
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*/ |
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isc_buffer_activeregion(source, &sr); |
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if (sr.length < 4) |
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return (ISC_R_UNEXPECTEDEND); |
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RETERR(mem_tobuffer(target, sr.base, 4)); |
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isc_buffer_forward(source, 4); |
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/* |
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* Flags. |
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*/ |
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RETERR(txt_fromwire(source, target)); |
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/* |
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* Service. |
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*/ |
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RETERR(txt_fromwire(source, target)); |
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/* |
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* Regexp. |
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*/ |
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regex = isc_buffer_used(target); |
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RETERR(txt_fromwire(source, target)); |
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RETERR(txt_valid_regex(regex)); |
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/* |
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* Replacement. |
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*/ |
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return (dns_name_fromwire(&name, source, dctx, options, target)); |
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} |
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static inline isc_result_t |
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towire_naptr(ARGS_TOWIRE) { |
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dns_name_t name; |
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dns_offsets_t offsets; |
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isc_region_t sr; |
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REQUIRE(rdata->type == dns_rdatatype_naptr); |
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REQUIRE(rdata->length != 0); |
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dns_compress_setmethods(cctx, DNS_COMPRESS_NONE); |
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/* |
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* Order, preference. |
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*/ |
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dns_rdata_toregion(rdata, &sr); |
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RETERR(mem_tobuffer(target, sr.base, 4)); |
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isc_region_consume(&sr, 4); |
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/* |
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* Flags. |
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*/ |
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RETERR(mem_tobuffer(target, sr.base, sr.base[0] + 1)); |
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isc_region_consume(&sr, sr.base[0] + 1); |
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/* |
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* Service. |
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*/ |
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RETERR(mem_tobuffer(target, sr.base, sr.base[0] + 1)); |
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isc_region_consume(&sr, sr.base[0] + 1); |
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/* |
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* Regexp. |
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*/ |
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RETERR(mem_tobuffer(target, sr.base, sr.base[0] + 1)); |
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isc_region_consume(&sr, sr.base[0] + 1); |
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/* |
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* Replacement. |
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*/ |
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dns_name_init(&name, offsets); |
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dns_name_fromregion(&name, &sr); |
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return (dns_name_towire(&name, cctx, target)); |
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} |
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static inline int |
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compare_naptr(ARGS_COMPARE) { |
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dns_name_t name1; |
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dns_name_t name2; |
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isc_region_t region1; |
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isc_region_t region2; |
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int order, len; |
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REQUIRE(rdata1->type == rdata2->type); |
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REQUIRE(rdata1->rdclass == rdata2->rdclass); |
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REQUIRE(rdata1->type == dns_rdatatype_naptr); |
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REQUIRE(rdata1->length != 0); |
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REQUIRE(rdata2->length != 0); |
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dns_rdata_toregion(rdata1, ®ion1); |
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dns_rdata_toregion(rdata2, ®ion2); |
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/* |
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* Order, preference. |
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*/ |
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order = memcmp(region1.base, region2.base, 4); |
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if (order != 0) |
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return (order < 0 ? -1 : 1); |
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isc_region_consume(®ion1, 4); |
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isc_region_consume(®ion2, 4); |
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/* |
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* Flags. |
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*/ |
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len = ISC_MIN(region1.base[0], region2.base[0]); |
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order = memcmp(region1.base, region2.base, len + 1); |
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if (order != 0) |
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return (order < 0 ? -1 : 1); |
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isc_region_consume(®ion1, region1.base[0] + 1); |
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isc_region_consume(®ion2, region2.base[0] + 1); |
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/* |
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* Service. |
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*/ |
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len = ISC_MIN(region1.base[0], region2.base[0]); |
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order = memcmp(region1.base, region2.base, len + 1); |
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if (order != 0) |
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return (order < 0 ? -1 : 1); |
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isc_region_consume(®ion1, region1.base[0] + 1); |
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isc_region_consume(®ion2, region2.base[0] + 1); |
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/* |
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* Regexp. |
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*/ |
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len = ISC_MIN(region1.base[0], region2.base[0]); |
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order = memcmp(region1.base, region2.base, len + 1); |
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if (order != 0) |
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return (order < 0 ? -1 : 1); |
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isc_region_consume(®ion1, region1.base[0] + 1); |
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isc_region_consume(®ion2, region2.base[0] + 1); |
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/* |
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* Replacement. |
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*/ |
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dns_name_init(&name1, NULL); |
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dns_name_init(&name2, NULL); |
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dns_name_fromregion(&name1, ®ion1); |
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dns_name_fromregion(&name2, ®ion2); |
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return (dns_name_rdatacompare(&name1, &name2)); |
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} |
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static inline isc_result_t |
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fromstruct_naptr(ARGS_FROMSTRUCT) { |
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dns_rdata_naptr_t *naptr = source; |
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isc_region_t region; |
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REQUIRE(type == dns_rdatatype_naptr); |
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REQUIRE(source != NULL); |
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REQUIRE(naptr->common.rdtype == type); |
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REQUIRE(naptr->common.rdclass == rdclass); |
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REQUIRE(naptr->flags != NULL || naptr->flags_len == 0); |
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REQUIRE(naptr->service != NULL || naptr->service_len == 0); |
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REQUIRE(naptr->regexp != NULL || naptr->regexp_len == 0); |
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UNUSED(type); |
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UNUSED(rdclass); |
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RETERR(uint16_tobuffer(naptr->order, target)); |
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RETERR(uint16_tobuffer(naptr->preference, target)); |
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RETERR(uint8_tobuffer(naptr->flags_len, target)); |
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RETERR(mem_tobuffer(target, naptr->flags, naptr->flags_len)); |
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RETERR(uint8_tobuffer(naptr->service_len, target)); |
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RETERR(mem_tobuffer(target, naptr->service, naptr->service_len)); |
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RETERR(uint8_tobuffer(naptr->regexp_len, target)); |
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RETERR(mem_tobuffer(target, naptr->regexp, naptr->regexp_len)); |
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dns_name_toregion(&naptr->replacement, ®ion); |
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return (isc_buffer_copyregion(target, ®ion)); |
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} |
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static inline isc_result_t |
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tostruct_naptr(ARGS_TOSTRUCT) { |
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dns_rdata_naptr_t *naptr = target; |
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isc_region_t r; |
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isc_result_t result; |
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dns_name_t name; |
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REQUIRE(rdata->type == dns_rdatatype_naptr); |
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REQUIRE(target != NULL); |
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REQUIRE(rdata->length != 0); |
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naptr->common.rdclass = rdata->rdclass; |
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naptr->common.rdtype = rdata->type; |
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ISC_LINK_INIT(&naptr->common, link); |
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naptr->flags = NULL; |
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naptr->service = NULL; |
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naptr->regexp = NULL; |
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dns_rdata_toregion(rdata, &r); |
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naptr->order = uint16_fromregion(&r); |
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isc_region_consume(&r, 2); |
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naptr->preference = uint16_fromregion(&r); |
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isc_region_consume(&r, 2); |
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naptr->flags_len = uint8_fromregion(&r); |
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isc_region_consume(&r, 1); |
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INSIST(naptr->flags_len <= r.length); |
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naptr->flags = mem_maybedup(mctx, r.base, naptr->flags_len); |
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if (naptr->flags == NULL) |
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goto cleanup; |
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isc_region_consume(&r, naptr->flags_len); |
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naptr->service_len = uint8_fromregion(&r); |
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isc_region_consume(&r, 1); |
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INSIST(naptr->service_len <= r.length); |
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naptr->service = mem_maybedup(mctx, r.base, naptr->service_len); |
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if (naptr->service == NULL) |
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goto cleanup; |
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isc_region_consume(&r, naptr->service_len); |
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naptr->regexp_len = uint8_fromregion(&r); |
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isc_region_consume(&r, 1); |
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INSIST(naptr->regexp_len <= r.length); |
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naptr->regexp = mem_maybedup(mctx, r.base, naptr->regexp_len); |
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if (naptr->regexp == NULL) |
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goto cleanup; |
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isc_region_consume(&r, naptr->regexp_len); |
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|
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dns_name_init(&name, NULL); |
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dns_name_fromregion(&name, &r); |
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dns_name_init(&naptr->replacement, NULL); |
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result = name_duporclone(&name, mctx, &naptr->replacement); |
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if (result != ISC_R_SUCCESS) |
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goto cleanup; |
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naptr->mctx = mctx; |
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return (ISC_R_SUCCESS); |
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|
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cleanup: |
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if (mctx != NULL && naptr->flags != NULL) |
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isc_mem_free(mctx, naptr->flags); |
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if (mctx != NULL && naptr->service != NULL) |
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isc_mem_free(mctx, naptr->service); |
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if (mctx != NULL && naptr->regexp != NULL) |
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isc_mem_free(mctx, naptr->regexp); |
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return (ISC_R_NOMEMORY); |
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} |
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|
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static inline void |
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freestruct_naptr(ARGS_FREESTRUCT) { |
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dns_rdata_naptr_t *naptr = source; |
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|
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REQUIRE(source != NULL); |
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REQUIRE(naptr->common.rdtype == dns_rdatatype_naptr); |
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|
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if (naptr->mctx == NULL) |
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return; |
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|
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if (naptr->flags != NULL) |
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isc_mem_free(naptr->mctx, naptr->flags); |
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if (naptr->service != NULL) |
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isc_mem_free(naptr->mctx, naptr->service); |
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if (naptr->regexp != NULL) |
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isc_mem_free(naptr->mctx, naptr->regexp); |
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dns_name_free(&naptr->replacement, naptr->mctx); |
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naptr->mctx = NULL; |
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} |
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|
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static inline isc_result_t |
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additionaldata_naptr(ARGS_ADDLDATA) { |
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dns_name_t name; |
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dns_offsets_t offsets; |
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isc_region_t sr; |
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dns_rdatatype_t atype; |
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unsigned int i, flagslen; |
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char *cp; |
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|
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REQUIRE(rdata->type == dns_rdatatype_naptr); |
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|
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/* |
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* Order, preference. |
|
*/ |
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dns_rdata_toregion(rdata, &sr); |
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isc_region_consume(&sr, 4); |
|
|
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/* |
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* Flags. |
|
*/ |
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atype = 0; |
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flagslen = sr.base[0]; |
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cp = (char *)&sr.base[1]; |
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for (i = 0; i < flagslen; i++, cp++) { |
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if (*cp == 'S' || *cp == 's') { |
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atype = dns_rdatatype_srv; |
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break; |
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} |
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if (*cp == 'A' || *cp == 'a') { |
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atype = dns_rdatatype_a; |
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break; |
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} |
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} |
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isc_region_consume(&sr, flagslen + 1); |
|
|
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/* |
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* Service. |
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*/ |
|
isc_region_consume(&sr, sr.base[0] + 1); |
|
|
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/* |
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* Regexp. |
|
*/ |
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isc_region_consume(&sr, sr.base[0] + 1); |
|
|
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/* |
|
* Replacement. |
|
*/ |
|
dns_name_init(&name, offsets); |
|
dns_name_fromregion(&name, &sr); |
|
|
|
if (atype != 0) |
|
return ((add)(arg, &name, atype)); |
|
|
|
return (ISC_R_SUCCESS); |
|
} |
|
|
|
static inline isc_result_t |
|
digest_naptr(ARGS_DIGEST) { |
|
isc_region_t r1, r2; |
|
unsigned int length, n; |
|
isc_result_t result; |
|
dns_name_t name; |
|
|
|
REQUIRE(rdata->type == dns_rdatatype_naptr); |
|
|
|
dns_rdata_toregion(rdata, &r1); |
|
r2 = r1; |
|
length = 0; |
|
|
|
/* |
|
* Order, preference. |
|
*/ |
|
length += 4; |
|
isc_region_consume(&r2, 4); |
|
|
|
/* |
|
* Flags. |
|
*/ |
|
n = r2.base[0] + 1; |
|
length += n; |
|
isc_region_consume(&r2, n); |
|
|
|
/* |
|
* Service. |
|
*/ |
|
n = r2.base[0] + 1; |
|
length += n; |
|
isc_region_consume(&r2, n); |
|
|
|
/* |
|
* Regexp. |
|
*/ |
|
n = r2.base[0] + 1; |
|
length += n; |
|
isc_region_consume(&r2, n); |
|
|
|
/* |
|
* Digest the RR up to the replacement name. |
|
*/ |
|
r1.length = length; |
|
result = (digest)(arg, &r1); |
|
if (result != ISC_R_SUCCESS) |
|
return (result); |
|
|
|
/* |
|
* Replacement. |
|
*/ |
|
|
|
dns_name_init(&name, NULL); |
|
dns_name_fromregion(&name, &r2); |
|
|
|
return (dns_name_digest(&name, digest, arg)); |
|
} |
|
|
|
static inline bool |
|
checkowner_naptr(ARGS_CHECKOWNER) { |
|
|
|
REQUIRE(type == dns_rdatatype_naptr); |
|
|
|
UNUSED(name); |
|
UNUSED(type); |
|
UNUSED(rdclass); |
|
UNUSED(wildcard); |
|
|
|
return (true); |
|
} |
|
|
|
static inline bool |
|
checknames_naptr(ARGS_CHECKNAMES) { |
|
|
|
REQUIRE(rdata->type == dns_rdatatype_naptr); |
|
|
|
UNUSED(rdata); |
|
UNUSED(owner); |
|
UNUSED(bad); |
|
|
|
return (true); |
|
} |
|
|
|
static inline int |
|
casecompare_naptr(ARGS_COMPARE) { |
|
return (compare_naptr(rdata1, rdata2)); |
|
} |
|
|
|
#endif /* RDATA_GENERIC_NAPTR_35_C */ |