Adding upstream version 1:9.18.19.upstream/1%9.18.19upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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, &region);
+	RETERR(isc_buffer_copyregion(target, &region));
+
+	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, &region);
+	dns_name_fromregion(&name, &region);
+	isc_region_consume(&region, 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 */