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-rw-r--r--lib/dns/rdata/generic/nxt_30.c325
1 files changed, 325 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..91a95b7
--- /dev/null
+++ b/lib/dns/rdata/generic/nxt_30.c
@@ -0,0 +1,325 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * 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 http://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 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;
+ 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 inline 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("65535")];
+ snprintf(buf, sizeof(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 == 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 inline 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 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 == 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);
+
+ 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 == dns_rdatatype_nxt);
+ 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, &region);
+ RETERR(isc_buffer_copyregion(target, &region));
+
+ 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 == dns_rdatatype_nxt);
+ 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, &region);
+ dns_name_fromregion(&name, &region);
+ isc_region_consume(&region, 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 == 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 inline isc_result_t
+additionaldata_nxt(ARGS_ADDLDATA) {
+ REQUIRE(rdata->type == dns_rdatatype_nxt);
+
+ 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 == 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 inline bool
+checkowner_nxt(ARGS_CHECKOWNER) {
+
+ REQUIRE(type == dns_rdatatype_nxt);
+
+ UNUSED(name);
+ UNUSED(type);
+ UNUSED(rdclass);
+ UNUSED(wildcard);
+
+ return (true);
+}
+
+static inline bool
+checknames_nxt(ARGS_CHECKNAMES) {
+
+ REQUIRE(rdata->type == dns_rdatatype_nxt);
+
+ UNUSED(rdata);
+ UNUSED(owner);
+ UNUSED(bad);
+
+ return (true);
+}
+
+static inline int
+casecompare_nxt(ARGS_COMPARE) {
+ return (compare_nxt(rdata1, rdata2));
+}
+#endif /* RDATA_GENERIC_NXT_30_C */