/contrib/bind9/lib/dns/rdata/in_1/naptr_35.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 710 lines · 456 code · 107 blank · 147 comment · 138 complexity · fa9703acc10abada13acce9b1dde9836 MD5 · raw file
- /*
- * Copyright (C) 2004, 2005, 2007-2009, 2012 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1999-2001, 2003 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
- /* $Id$ */
- /* Reviewed: Thu Mar 16 16:52:50 PST 2000 by bwelling */
- /* RFC2915 */
- #ifndef RDATA_IN_1_NAPTR_35_C
- #define RDATA_IN_1_NAPTR_35_C
- #define RRTYPE_NAPTR_ATTRIBUTES (0)
- #ifdef HAVE_REGEX_H
- #include <regex.h>
- #endif
- /*
- * Check the wire format of the Regexp field.
- * Don't allow embeded NUL's.
- */
- static inline isc_result_t
- txt_valid_regex(const unsigned char *txt) {
- #ifdef HAVE_REGEX_H
- regex_t preg;
- unsigned int regflags = REG_EXTENDED;
- unsigned int nsub = 0;
- char regex[256];
- char *cp;
- #endif
- isc_boolean_t flags = ISC_FALSE;
- isc_boolean_t replace = ISC_FALSE;
- unsigned char c;
- unsigned char delim;
- unsigned int len;
- len = *txt++;
- if (len == 0U)
- return (ISC_R_SUCCESS);
- delim = *txt++;
- len--;
- /*
- * Digits, backslash and flags can't be delimiters.
- */
- switch (delim) {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- case '\\': case 'i': case 0:
- return (DNS_R_SYNTAX);
- }
- #ifdef HAVE_REGEX_H
- memset(&preg, 0, sizeof(preg));
- cp = regex;
- #endif
- while (len-- > 0) {
- c = *txt++;
- if (c == 0)
- return (DNS_R_SYNTAX);
- if (c == delim && !replace) {
- replace = ISC_TRUE;
- continue;
- } else if (c == delim && !flags) {
- flags = ISC_TRUE;
- continue;
- } else if (c == delim)
- return (DNS_R_SYNTAX);
- /*
- * Flags are not escaped.
- */
- if (flags) {
- switch (c) {
- case 'i':
- #ifdef HAVE_REGEX_H
- regflags |= REG_ICASE;
- #endif
- continue;
- default:
- return (DNS_R_SYNTAX);
- }
- }
- #ifdef HAVE_REGEX_H
- if (!replace)
- *cp++ = c;
- #endif
- if (c == '\\') {
- if (len == 0)
- return (DNS_R_SYNTAX);
- c = *txt++;
- if (c == 0)
- return (DNS_R_SYNTAX);
- len--;
- if (replace)
- switch (c) {
- case '0': return (DNS_R_SYNTAX);
- #ifdef HAVE_REGEX_H
- case '1': if (nsub < 1) nsub = 1; break;
- case '2': if (nsub < 2) nsub = 2; break;
- case '3': if (nsub < 3) nsub = 3; break;
- case '4': if (nsub < 4) nsub = 4; break;
- case '5': if (nsub < 5) nsub = 5; break;
- case '6': if (nsub < 6) nsub = 6; break;
- case '7': if (nsub < 7) nsub = 7; break;
- case '8': if (nsub < 8) nsub = 8; break;
- case '9': if (nsub < 9) nsub = 9; break;
- #endif
- }
- #ifdef HAVE_REGEX_H
- if (!replace)
- *cp++ = c;
- #endif
- }
- }
- if (!flags)
- return (DNS_R_SYNTAX);
- #ifdef HAVE_REGEX_H
- *cp = '\0';
- if (regcomp(&preg, regex, regflags))
- return (DNS_R_SYNTAX);
- /*
- * Check that substitutions in the replacement string are consistant
- * with the regular expression.
- */
- if (preg.re_nsub < nsub) {
- regfree(&preg);
- return (DNS_R_SYNTAX);
- }
- regfree(&preg);
- #endif
- return (ISC_R_SUCCESS);
- }
- static inline isc_result_t
- fromtext_in_naptr(ARGS_FROMTEXT) {
- isc_token_t token;
- dns_name_t name;
- isc_buffer_t buffer;
- unsigned char *regex;
- REQUIRE(type == 35);
- REQUIRE(rdclass == 1);
- UNUSED(type);
- UNUSED(rdclass);
- UNUSED(callbacks);
- /*
- * Order.
- */
- RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
- ISC_FALSE));
- if (token.value.as_ulong > 0xffffU)
- RETTOK(ISC_R_RANGE);
- RETERR(uint16_tobuffer(token.value.as_ulong, target));
- /*
- * Preference.
- */
- RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
- ISC_FALSE));
- if (token.value.as_ulong > 0xffffU)
- RETTOK(ISC_R_RANGE);
- RETERR(uint16_tobuffer(token.value.as_ulong, target));
- /*
- * Flags.
- */
- RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring,
- ISC_FALSE));
- RETTOK(txt_fromtext(&token.value.as_textregion, target));
- /*
- * Service.
- */
- RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring,
- ISC_FALSE));
- RETTOK(txt_fromtext(&token.value.as_textregion, target));
- /*
- * Regexp.
- */
- regex = isc_buffer_used(target);
- RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring,
- ISC_FALSE));
- RETTOK(txt_fromtext(&token.value.as_textregion, target));
- RETTOK(txt_valid_regex(regex));
- /*
- * Replacement.
- */
- RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
- ISC_FALSE));
- dns_name_init(&name, NULL);
- buffer_fromregion(&buffer, &token.value.as_region);
- origin = (origin != NULL) ? origin : dns_rootname;
- RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
- return (ISC_R_SUCCESS);
- }
- static inline isc_result_t
- totext_in_naptr(ARGS_TOTEXT) {
- isc_region_t region;
- dns_name_t name;
- dns_name_t prefix;
- isc_boolean_t sub;
- char buf[sizeof("64000")];
- unsigned short num;
- REQUIRE(rdata->type == 35);
- REQUIRE(rdata->rdclass == 1);
- REQUIRE(rdata->length != 0);
- dns_name_init(&name, NULL);
- dns_name_init(&prefix, NULL);
- dns_rdata_toregion(rdata, ®ion);
- /*
- * Order.
- */
- num = uint16_fromregion(®ion);
- isc_region_consume(®ion, 2);
- sprintf(buf, "%u", num);
- RETERR(str_totext(buf, target));
- RETERR(str_totext(" ", target));
- /*
- * Preference.
- */
- num = uint16_fromregion(®ion);
- isc_region_consume(®ion, 2);
- sprintf(buf, "%u", num);
- RETERR(str_totext(buf, target));
- RETERR(str_totext(" ", target));
- /*
- * Flags.
- */
- RETERR(txt_totext(®ion, target));
- RETERR(str_totext(" ", target));
- /*
- * Service.
- */
- RETERR(txt_totext(®ion, target));
- RETERR(str_totext(" ", target));
- /*
- * Regexp.
- */
- RETERR(txt_totext(®ion, target));
- RETERR(str_totext(" ", target));
- /*
- * Replacement.
- */
- dns_name_fromregion(&name, ®ion);
- sub = name_prefix(&name, tctx->origin, &prefix);
- return (dns_name_totext(&prefix, sub, target));
- }
- static inline isc_result_t
- fromwire_in_naptr(ARGS_FROMWIRE) {
- dns_name_t name;
- isc_region_t sr;
- unsigned char *regex;
- REQUIRE(type == 35);
- REQUIRE(rdclass == 1);
- UNUSED(type);
- UNUSED(rdclass);
- dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
- dns_name_init(&name, NULL);
- /*
- * Order, preference.
- */
- isc_buffer_activeregion(source, &sr);
- if (sr.length < 4)
- return (ISC_R_UNEXPECTEDEND);
- RETERR(mem_tobuffer(target, sr.base, 4));
- isc_buffer_forward(source, 4);
- /*
- * Flags.
- */
- RETERR(txt_fromwire(source, target));
- /*
- * Service.
- */
- RETERR(txt_fromwire(source, target));
- /*
- * Regexp.
- */
- regex = isc_buffer_used(target);
- RETERR(txt_fromwire(source, target));
- RETERR(txt_valid_regex(regex));
- /*
- * Replacement.
- */
- return (dns_name_fromwire(&name, source, dctx, options, target));
- }
- static inline isc_result_t
- towire_in_naptr(ARGS_TOWIRE) {
- dns_name_t name;
- dns_offsets_t offsets;
- isc_region_t sr;
- REQUIRE(rdata->type == 35);
- REQUIRE(rdata->rdclass == 1);
- REQUIRE(rdata->length != 0);
- dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
- /*
- * Order, preference.
- */
- dns_rdata_toregion(rdata, &sr);
- RETERR(mem_tobuffer(target, sr.base, 4));
- isc_region_consume(&sr, 4);
- /*
- * Flags.
- */
- RETERR(mem_tobuffer(target, sr.base, sr.base[0] + 1));
- isc_region_consume(&sr, sr.base[0] + 1);
- /*
- * Service.
- */
- RETERR(mem_tobuffer(target, sr.base, sr.base[0] + 1));
- isc_region_consume(&sr, sr.base[0] + 1);
- /*
- * Regexp.
- */
- RETERR(mem_tobuffer(target, sr.base, sr.base[0] + 1));
- isc_region_consume(&sr, sr.base[0] + 1);
- /*
- * Replacement.
- */
- dns_name_init(&name, offsets);
- dns_name_fromregion(&name, &sr);
- return (dns_name_towire(&name, cctx, target));
- }
- static inline int
- compare_in_naptr(ARGS_COMPARE) {
- dns_name_t name1;
- dns_name_t name2;
- isc_region_t region1;
- isc_region_t region2;
- int order, len;
- REQUIRE(rdata1->type == rdata2->type);
- REQUIRE(rdata1->rdclass == rdata2->rdclass);
- REQUIRE(rdata1->type == 35);
- REQUIRE(rdata1->rdclass == 1);
- REQUIRE(rdata1->length != 0);
- REQUIRE(rdata2->length != 0);
- dns_rdata_toregion(rdata1, ®ion1);
- dns_rdata_toregion(rdata2, ®ion2);
- /*
- * Order, preference.
- */
- order = memcmp(region1.base, region2.base, 4);
- if (order != 0)
- return (order < 0 ? -1 : 1);
- isc_region_consume(®ion1, 4);
- isc_region_consume(®ion2, 4);
- /*
- * Flags.
- */
- len = ISC_MIN(region1.base[0], region2.base[0]);
- order = memcmp(region1.base, region2.base, len + 1);
- if (order != 0)
- return (order < 0 ? -1 : 1);
- isc_region_consume(®ion1, region1.base[0] + 1);
- isc_region_consume(®ion2, region2.base[0] + 1);
- /*
- * Service.
- */
- len = ISC_MIN(region1.base[0], region2.base[0]);
- order = memcmp(region1.base, region2.base, len + 1);
- if (order != 0)
- return (order < 0 ? -1 : 1);
- isc_region_consume(®ion1, region1.base[0] + 1);
- isc_region_consume(®ion2, region2.base[0] + 1);
- /*
- * Regexp.
- */
- len = ISC_MIN(region1.base[0], region2.base[0]);
- order = memcmp(region1.base, region2.base, len + 1);
- if (order != 0)
- return (order < 0 ? -1 : 1);
- isc_region_consume(®ion1, region1.base[0] + 1);
- isc_region_consume(®ion2, region2.base[0] + 1);
- /*
- * Replacement.
- */
- dns_name_init(&name1, NULL);
- dns_name_init(&name2, NULL);
- dns_name_fromregion(&name1, ®ion1);
- dns_name_fromregion(&name2, ®ion2);
- return (dns_name_rdatacompare(&name1, &name2));
- }
- static inline isc_result_t
- fromstruct_in_naptr(ARGS_FROMSTRUCT) {
- dns_rdata_in_naptr_t *naptr = source;
- isc_region_t region;
- REQUIRE(type == 35);
- REQUIRE(rdclass == 1);
- REQUIRE(source != NULL);
- REQUIRE(naptr->common.rdtype == type);
- REQUIRE(naptr->common.rdclass == rdclass);
- REQUIRE(naptr->flags != NULL || naptr->flags_len == 0);
- REQUIRE(naptr->service != NULL || naptr->service_len == 0);
- REQUIRE(naptr->regexp != NULL || naptr->regexp_len == 0);
- UNUSED(type);
- UNUSED(rdclass);
- RETERR(uint16_tobuffer(naptr->order, target));
- RETERR(uint16_tobuffer(naptr->preference, target));
- RETERR(uint8_tobuffer(naptr->flags_len, target));
- RETERR(mem_tobuffer(target, naptr->flags, naptr->flags_len));
- RETERR(uint8_tobuffer(naptr->service_len, target));
- RETERR(mem_tobuffer(target, naptr->service, naptr->service_len));
- RETERR(uint8_tobuffer(naptr->regexp_len, target));
- RETERR(mem_tobuffer(target, naptr->regexp, naptr->regexp_len));
- dns_name_toregion(&naptr->replacement, ®ion);
- return (isc_buffer_copyregion(target, ®ion));
- }
- static inline isc_result_t
- tostruct_in_naptr(ARGS_TOSTRUCT) {
- dns_rdata_in_naptr_t *naptr = target;
- isc_region_t r;
- isc_result_t result;
- dns_name_t name;
- REQUIRE(rdata->type == 35);
- REQUIRE(rdata->rdclass == 1);
- REQUIRE(target != NULL);
- REQUIRE(rdata->length != 0);
- naptr->common.rdclass = rdata->rdclass;
- naptr->common.rdtype = rdata->type;
- ISC_LINK_INIT(&naptr->common, link);
- naptr->flags = NULL;
- naptr->service = NULL;
- naptr->regexp = NULL;
- dns_rdata_toregion(rdata, &r);
- naptr->order = uint16_fromregion(&r);
- isc_region_consume(&r, 2);
- naptr->preference = uint16_fromregion(&r);
- isc_region_consume(&r, 2);
- naptr->flags_len = uint8_fromregion(&r);
- isc_region_consume(&r, 1);
- INSIST(naptr->flags_len <= r.length);
- naptr->flags = mem_maybedup(mctx, r.base, naptr->flags_len);
- if (naptr->flags == NULL)
- goto cleanup;
- isc_region_consume(&r, naptr->flags_len);
- naptr->service_len = uint8_fromregion(&r);
- isc_region_consume(&r, 1);
- INSIST(naptr->service_len <= r.length);
- naptr->service = mem_maybedup(mctx, r.base, naptr->service_len);
- if (naptr->service == NULL)
- goto cleanup;
- isc_region_consume(&r, naptr->service_len);
- naptr->regexp_len = uint8_fromregion(&r);
- isc_region_consume(&r, 1);
- INSIST(naptr->regexp_len <= r.length);
- naptr->regexp = mem_maybedup(mctx, r.base, naptr->regexp_len);
- if (naptr->regexp == NULL)
- goto cleanup;
- isc_region_consume(&r, naptr->regexp_len);
- dns_name_init(&name, NULL);
- dns_name_fromregion(&name, &r);
- dns_name_init(&naptr->replacement, NULL);
- result = name_duporclone(&name, mctx, &naptr->replacement);
- if (result != ISC_R_SUCCESS)
- goto cleanup;
- naptr->mctx = mctx;
- return (ISC_R_SUCCESS);
- cleanup:
- if (mctx != NULL && naptr->flags != NULL)
- isc_mem_free(mctx, naptr->flags);
- if (mctx != NULL && naptr->service != NULL)
- isc_mem_free(mctx, naptr->service);
- if (mctx != NULL && naptr->regexp != NULL)
- isc_mem_free(mctx, naptr->regexp);
- return (ISC_R_NOMEMORY);
- }
- static inline void
- freestruct_in_naptr(ARGS_FREESTRUCT) {
- dns_rdata_in_naptr_t *naptr = source;
- REQUIRE(source != NULL);
- REQUIRE(naptr->common.rdclass == 1);
- REQUIRE(naptr->common.rdtype == 35);
- if (naptr->mctx == NULL)
- return;
- if (naptr->flags != NULL)
- isc_mem_free(naptr->mctx, naptr->flags);
- if (naptr->service != NULL)
- isc_mem_free(naptr->mctx, naptr->service);
- if (naptr->regexp != NULL)
- isc_mem_free(naptr->mctx, naptr->regexp);
- dns_name_free(&naptr->replacement, naptr->mctx);
- naptr->mctx = NULL;
- }
- static inline isc_result_t
- additionaldata_in_naptr(ARGS_ADDLDATA) {
- dns_name_t name;
- dns_offsets_t offsets;
- isc_region_t sr;
- dns_rdatatype_t atype;
- unsigned int i, flagslen;
- char *cp;
- REQUIRE(rdata->type == 35);
- REQUIRE(rdata->rdclass == 1);
- /*
- * Order, preference.
- */
- dns_rdata_toregion(rdata, &sr);
- isc_region_consume(&sr, 4);
- /*
- * Flags.
- */
- atype = 0;
- flagslen = sr.base[0];
- cp = (char *)&sr.base[1];
- for (i = 0; i < flagslen; i++, cp++) {
- if (*cp == 'S' || *cp == 's') {
- atype = dns_rdatatype_srv;
- break;
- }
- if (*cp == 'A' || *cp == 'a') {
- atype = dns_rdatatype_a;
- break;
- }
- }
- isc_region_consume(&sr, flagslen + 1);
- /*
- * Service.
- */
- isc_region_consume(&sr, sr.base[0] + 1);
- /*
- * Regexp.
- */
- isc_region_consume(&sr, sr.base[0] + 1);
- /*
- * 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_in_naptr(ARGS_DIGEST) {
- isc_region_t r1, r2;
- unsigned int length, n;
- isc_result_t result;
- dns_name_t name;
- REQUIRE(rdata->type == 35);
- REQUIRE(rdata->rdclass == 1);
- 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 isc_boolean_t
- checkowner_in_naptr(ARGS_CHECKOWNER) {
- REQUIRE(type == 35);
- REQUIRE(rdclass == 1);
- UNUSED(name);
- UNUSED(type);
- UNUSED(rdclass);
- UNUSED(wildcard);
- return (ISC_TRUE);
- }
- static inline isc_boolean_t
- checknames_in_naptr(ARGS_CHECKNAMES) {
- REQUIRE(rdata->type == 35);
- REQUIRE(rdata->rdclass == 1);
- UNUSED(rdata);
- UNUSED(owner);
- UNUSED(bad);
- return (ISC_TRUE);
- }
- static inline int
- casecompare_in_naptr(ARGS_COMPARE) {
- return (compare_in_naptr(rdata1, rdata2));
- }
- #endif /* RDATA_IN_1_NAPTR_35_C */