/contrib/bind9/lib/dns/rdata/generic/nxt_30.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 333 lines · 244 code · 60 blank · 29 comment · 73 complexity · 9cdd5cb97b9b856905392f06fc1a6a6c MD5 · raw file
- /*
- * Copyright (C) 2004, 2005, 2007, 2009 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1999-2003 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
- /* $Id: nxt_30.c,v 1.65 2009/12/04 22:06:37 tbox Exp $ */
- /* reviewed: Wed Mar 15 18:21:15 PST 2000 by brister */
- /* RFC2535 */
- #ifndef RDATA_GENERIC_NXT_30_C
- #define RDATA_GENERIC_NXT_30_C
- /*
- * The attributes do not include DNS_RDATATYPEATTR_SINGLETON
- * because we must be able to handle a parent/child NXT pair.
- */
- #define RRTYPE_NXT_ATTRIBUTES (0)
- static inline isc_result_t
- fromtext_nxt(ARGS_FROMTEXT) {
- isc_token_t token;
- dns_name_t name;
- isc_buffer_t buffer;
- char *e;
- unsigned char bm[8*1024]; /* 64k bits */
- dns_rdatatype_t covered;
- dns_rdatatype_t maxcovered = 0;
- isc_boolean_t first = ISC_TRUE;
- long n;
- REQUIRE(type == 30);
- UNUSED(type);
- UNUSED(rdclass);
- UNUSED(callbacks);
- /*
- * Next domain.
- */
- 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));
- memset(bm, 0, sizeof(bm));
- do {
- RETERR(isc_lex_getmastertoken(lexer, &token,
- isc_tokentype_string, ISC_TRUE));
- if (token.type != isc_tokentype_string)
- break;
- n = strtol(DNS_AS_STR(token), &e, 10);
- if (e != DNS_AS_STR(token) && *e == '\0') {
- covered = (dns_rdatatype_t)n;
- } else if (dns_rdatatype_fromtext(&covered,
- &token.value.as_textregion) == DNS_R_UNKNOWN)
- RETTOK(DNS_R_UNKNOWN);
- /*
- * NXT is only specified for types 1..127.
- */
- if (covered < 1 || covered > 127)
- return (ISC_R_RANGE);
- if (first || covered > maxcovered)
- maxcovered = covered;
- first = ISC_FALSE;
- bm[covered/8] |= (0x80>>(covered%8));
- } while (1);
- isc_lex_ungettoken(lexer, &token);
- if (first)
- return (ISC_R_SUCCESS);
- n = (maxcovered + 8) / 8;
- return (mem_tobuffer(target, bm, n));
- }
- static inline isc_result_t
- totext_nxt(ARGS_TOTEXT) {
- isc_region_t sr;
- unsigned int i, j;
- dns_name_t name;
- dns_name_t prefix;
- isc_boolean_t sub;
- REQUIRE(rdata->type == 30);
- REQUIRE(rdata->length != 0);
- dns_name_init(&name, NULL);
- dns_name_init(&prefix, NULL);
- dns_rdata_toregion(rdata, &sr);
- dns_name_fromregion(&name, &sr);
- isc_region_consume(&sr, name_length(&name));
- sub = name_prefix(&name, tctx->origin, &prefix);
- RETERR(dns_name_totext(&prefix, sub, target));
- for (i = 0; i < sr.length; i++) {
- if (sr.base[i] != 0)
- for (j = 0; j < 8; j++)
- if ((sr.base[i] & (0x80 >> j)) != 0) {
- dns_rdatatype_t t = i * 8 + j;
- RETERR(str_totext(" ", target));
- if (dns_rdatatype_isknown(t)) {
- RETERR(dns_rdatatype_totext(t,
- target));
- } else {
- char buf[sizeof("65535")];
- sprintf(buf, "%u", t);
- RETERR(str_totext(buf,
- target));
- }
- }
- }
- return (ISC_R_SUCCESS);
- }
- static inline isc_result_t
- fromwire_nxt(ARGS_FROMWIRE) {
- isc_region_t sr;
- dns_name_t name;
- REQUIRE(type == 30);
- UNUSED(type);
- UNUSED(rdclass);
- dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
- dns_name_init(&name, NULL);
- RETERR(dns_name_fromwire(&name, source, dctx, options, target));
- isc_buffer_activeregion(source, &sr);
- if (sr.length > 0 && (sr.base[0] & 0x80) == 0 &&
- ((sr.length > 16) || sr.base[sr.length - 1] == 0))
- return (DNS_R_BADBITMAP);
- RETERR(mem_tobuffer(target, sr.base, sr.length));
- isc_buffer_forward(source, sr.length);
- return (ISC_R_SUCCESS);
- }
- static inline isc_result_t
- towire_nxt(ARGS_TOWIRE) {
- isc_region_t sr;
- dns_name_t name;
- dns_offsets_t offsets;
- REQUIRE(rdata->type == 30);
- REQUIRE(rdata->length != 0);
- dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
- dns_name_init(&name, offsets);
- dns_rdata_toregion(rdata, &sr);
- dns_name_fromregion(&name, &sr);
- isc_region_consume(&sr, name_length(&name));
- RETERR(dns_name_towire(&name, cctx, target));
- return (mem_tobuffer(target, sr.base, sr.length));
- }
- static inline int
- compare_nxt(ARGS_COMPARE) {
- isc_region_t r1;
- isc_region_t r2;
- dns_name_t name1;
- dns_name_t name2;
- int order;
- REQUIRE(rdata1->type == rdata2->type);
- REQUIRE(rdata1->rdclass == rdata2->rdclass);
- REQUIRE(rdata1->type == 30);
- REQUIRE(rdata1->length != 0);
- REQUIRE(rdata2->length != 0);
- dns_name_init(&name1, NULL);
- dns_name_init(&name2, NULL);
- dns_rdata_toregion(rdata1, &r1);
- dns_rdata_toregion(rdata2, &r2);
- dns_name_fromregion(&name1, &r1);
- dns_name_fromregion(&name2, &r2);
- order = dns_name_rdatacompare(&name1, &name2);
- if (order != 0)
- return (order);
- return (isc_region_compare(&r1, &r2));
- }
- static inline isc_result_t
- fromstruct_nxt(ARGS_FROMSTRUCT) {
- dns_rdata_nxt_t *nxt = source;
- isc_region_t region;
- REQUIRE(type == 30);
- REQUIRE(source != NULL);
- REQUIRE(nxt->common.rdtype == type);
- REQUIRE(nxt->common.rdclass == rdclass);
- REQUIRE(nxt->typebits != NULL || nxt->len == 0);
- if (nxt->typebits != NULL && (nxt->typebits[0] & 0x80) == 0) {
- REQUIRE(nxt->len <= 16);
- REQUIRE(nxt->typebits[nxt->len - 1] != 0);
- }
- UNUSED(type);
- UNUSED(rdclass);
- dns_name_toregion(&nxt->next, ®ion);
- RETERR(isc_buffer_copyregion(target, ®ion));
- return (mem_tobuffer(target, nxt->typebits, nxt->len));
- }
- static inline isc_result_t
- tostruct_nxt(ARGS_TOSTRUCT) {
- isc_region_t region;
- dns_rdata_nxt_t *nxt = target;
- dns_name_t name;
- REQUIRE(rdata->type == 30);
- REQUIRE(target != NULL);
- REQUIRE(rdata->length != 0);
- nxt->common.rdclass = rdata->rdclass;
- nxt->common.rdtype = rdata->type;
- ISC_LINK_INIT(&nxt->common, link);
- dns_name_init(&name, NULL);
- dns_rdata_toregion(rdata, ®ion);
- dns_name_fromregion(&name, ®ion);
- isc_region_consume(®ion, name_length(&name));
- dns_name_init(&nxt->next, NULL);
- RETERR(name_duporclone(&name, mctx, &nxt->next));
- nxt->len = region.length;
- nxt->typebits = mem_maybedup(mctx, region.base, region.length);
- if (nxt->typebits == NULL)
- goto cleanup;
- nxt->mctx = mctx;
- return (ISC_R_SUCCESS);
- cleanup:
- if (mctx != NULL)
- dns_name_free(&nxt->next, mctx);
- return (ISC_R_NOMEMORY);
- }
- static inline void
- freestruct_nxt(ARGS_FREESTRUCT) {
- dns_rdata_nxt_t *nxt = source;
- REQUIRE(source != NULL);
- REQUIRE(nxt->common.rdtype == 30);
- if (nxt->mctx == NULL)
- return;
- dns_name_free(&nxt->next, nxt->mctx);
- if (nxt->typebits != NULL)
- isc_mem_free(nxt->mctx, nxt->typebits);
- nxt->mctx = NULL;
- }
- static inline isc_result_t
- additionaldata_nxt(ARGS_ADDLDATA) {
- REQUIRE(rdata->type == 30);
- UNUSED(rdata);
- UNUSED(add);
- UNUSED(arg);
- return (ISC_R_SUCCESS);
- }
- static inline isc_result_t
- digest_nxt(ARGS_DIGEST) {
- isc_region_t r;
- dns_name_t name;
- isc_result_t result;
- REQUIRE(rdata->type == 30);
- dns_rdata_toregion(rdata, &r);
- dns_name_init(&name, NULL);
- dns_name_fromregion(&name, &r);
- result = dns_name_digest(&name, digest, arg);
- if (result != ISC_R_SUCCESS)
- return (result);
- isc_region_consume(&r, name_length(&name));
- return ((digest)(arg, &r));
- }
- static inline isc_boolean_t
- checkowner_nxt(ARGS_CHECKOWNER) {
- REQUIRE(type == 30);
- UNUSED(name);
- UNUSED(type);
- UNUSED(rdclass);
- UNUSED(wildcard);
- return (ISC_TRUE);
- }
- static inline isc_boolean_t
- checknames_nxt(ARGS_CHECKNAMES) {
- REQUIRE(rdata->type == 30);
- UNUSED(rdata);
- UNUSED(owner);
- UNUSED(bad);
- return (ISC_TRUE);
- }
- static inline int
- casecompare_nxt(ARGS_COMPARE) {
- return (compare_nxt(rdata1, rdata2));
- }
- #endif /* RDATA_GENERIC_NXT_30_C */