diff options
Diffstat (limited to 'lib/dns/rdata/generic/nxt_30.c')
| -rw-r--r-- | lib/dns/rdata/generic/nxt_30.c | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/nxt_30.c b/lib/dns/rdata/generic/nxt_30.c new file mode 100644 index 0000000..93d2384 --- /dev/null +++ b/lib/dns/rdata/generic/nxt_30.c @@ -0,0 +1,351 @@ +/* + * 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. + */ + +/* 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 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; + bool first = true; + long n; + + REQUIRE(type == dns_rdatatype_nxt); + + UNUSED(type); + UNUSED(rdclass); + UNUSED(callbacks); + + /* + * Next domain. + */ + RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, + false)); + dns_name_init(&name, NULL); + buffer_fromregion(&buffer, &token.value.as_region); + if (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, 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 = 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 isc_result_t +totext_nxt(ARGS_TOTEXT) { + isc_region_t sr; + unsigned int i, j; + dns_name_t name; + dns_name_t prefix; + bool sub; + + REQUIRE(rdata->type == dns_rdatatype_nxt); + 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("6553" + "5")]; + snprintf(buf, + sizeof(buf), + "%u", t); + RETERR(str_totext( + buf, target)); + } + } + } + } + } + } + return (ISC_R_SUCCESS); +} + +static isc_result_t +fromwire_nxt(ARGS_FROMWIRE) { + isc_region_t sr; + dns_name_t name; + + REQUIRE(type == dns_rdatatype_nxt); + + 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 isc_result_t +towire_nxt(ARGS_TOWIRE) { + isc_region_t sr; + dns_name_t name; + dns_offsets_t offsets; + + REQUIRE(rdata->type == dns_rdatatype_nxt); + 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 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 == dns_rdatatype_nxt); + 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); + } + + isc_region_consume(&r1, name_length(&name1)); + isc_region_consume(&r2, name_length(&name2)); + + return (isc_region_compare(&r1, &r2)); +} + +static isc_result_t +fromstruct_nxt(ARGS_FROMSTRUCT) { + dns_rdata_nxt_t *nxt = source; + isc_region_t region; + + REQUIRE(type == dns_rdatatype_nxt); + REQUIRE(nxt != 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 isc_result_t +tostruct_nxt(ARGS_TOSTRUCT) { + isc_region_t region; + dns_rdata_nxt_t *nxt = target; + dns_name_t name; + + REQUIRE(rdata->type == dns_rdatatype_nxt); + REQUIRE(nxt != 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); + 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 void +freestruct_nxt(ARGS_FREESTRUCT) { + dns_rdata_nxt_t *nxt = source; + + REQUIRE(nxt != NULL); + REQUIRE(nxt->common.rdtype == dns_rdatatype_nxt); + + 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 isc_result_t +additionaldata_nxt(ARGS_ADDLDATA) { + REQUIRE(rdata->type == dns_rdatatype_nxt); + + UNUSED(rdata); + UNUSED(owner); + UNUSED(add); + UNUSED(arg); + + return (ISC_R_SUCCESS); +} + +static isc_result_t +digest_nxt(ARGS_DIGEST) { + isc_region_t r; + dns_name_t name; + isc_result_t result; + + REQUIRE(rdata->type == dns_rdatatype_nxt); + + 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 bool +checkowner_nxt(ARGS_CHECKOWNER) { + REQUIRE(type == dns_rdatatype_nxt); + + UNUSED(name); + UNUSED(type); + UNUSED(rdclass); + UNUSED(wildcard); + + return (true); +} + +static bool +checknames_nxt(ARGS_CHECKNAMES) { + REQUIRE(rdata->type == dns_rdatatype_nxt); + + UNUSED(rdata); + UNUSED(owner); + UNUSED(bad); + + return (true); +} + +static int +casecompare_nxt(ARGS_COMPARE) { + return (compare_nxt(rdata1, rdata2)); +} +#endif /* RDATA_GENERIC_NXT_30_C */ |