1 files changed, 740 insertions, 0 deletions

diff --git a/lib/dns/rdata/generic/naptr_35.c b/lib/dns/rdata/generic/naptr_35.c
new file mode 100644
index 0000000..3f43e0e
--- /dev/null
+++ b/lib/dns/rdata/generic/naptr_35.c
@@ -0,0 +1,740 @@
+/*
+ * 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.
+ */
+
+/* RFC2915 */
+
+#ifndef RDATA_GENERIC_NAPTR_35_C
+#define RDATA_GENERIC_NAPTR_35_C
+
+#define RRTYPE_NAPTR_ATTRIBUTES (0)
+
+#include <isc/regex.h>
+
+/*
+ * Check the wire format of the Regexp field.
+ * Don't allow embedded NUL's.
+ */
+static isc_result_t
+txt_valid_regex(const unsigned char *txt) {
+	unsigned int nsub = 0;
+	char regex[256];
+	char *cp;
+	bool flags = false;
+	bool replace = false;
+	unsigned char c;
+	unsigned char delim;
+	unsigned int len;
+	int n;
+
+	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);
+	}
+
+	cp = regex;
+	while (len-- > 0) {
+		c = *txt++;
+		if (c == 0) {
+			return (DNS_R_SYNTAX);
+		}
+		if (c == delim && !replace) {
+			replace = true;
+			continue;
+		} else if (c == delim && !flags) {
+			flags = true;
+			continue;
+		} else if (c == delim) {
+			return (DNS_R_SYNTAX);
+		}
+		/*
+		 * Flags are not escaped.
+		 */
+		if (flags) {
+			switch (c) {
+			case 'i':
+				continue;
+			default:
+				return (DNS_R_SYNTAX);
+			}
+		}
+		if (!replace) {
+			*cp++ = c;
+		}
+		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);
+				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;
+				}
+			}
+			if (!replace) {
+				*cp++ = c;
+			}
+		}
+	}
+	if (!flags) {
+		return (DNS_R_SYNTAX);
+	}
+	*cp = '\0';
+	n = isc_regex_validate(regex);
+	if (n < 0 || nsub > (unsigned int)n) {
+		return (DNS_R_SYNTAX);
+	}
+	return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+fromtext_naptr(ARGS_FROMTEXT) {
+	isc_token_t token;
+	dns_name_t name;
+	isc_buffer_t buffer;
+	unsigned char *regex;
+
+	REQUIRE(type == dns_rdatatype_naptr);
+
+	UNUSED(type);
+	UNUSED(rdclass);
+	UNUSED(callbacks);
+
+	/*
+	 * Order.
+	 */
+	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
+				      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,
+				      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,
+				      false));
+	RETTOK(txt_fromtext(&token.value.as_textregion, target));
+
+	/*
+	 * Service.
+	 */
+	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring,
+				      false));
+	RETTOK(txt_fromtext(&token.value.as_textregion, target));
+
+	/*
+	 * Regexp.
+	 */
+	regex = isc_buffer_used(target);
+	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring,
+				      false));
+	RETTOK(txt_fromtext(&token.value.as_textregion, target));
+	RETTOK(txt_valid_regex(regex));
+
+	/*
+	 * Replacement.
+	 */
+	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));
+	return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+totext_naptr(ARGS_TOTEXT) {
+	isc_region_t region;
+	dns_name_t name;
+	dns_name_t prefix;
+	bool sub;
+	char buf[sizeof("64000")];
+	unsigned short num;
+
+	REQUIRE(rdata->type == dns_rdatatype_naptr);
+	REQUIRE(rdata->length != 0);
+
+	dns_name_init(&name, NULL);
+	dns_name_init(&prefix, NULL);
+
+	dns_rdata_toregion(rdata, &region);
+
+	/*
+	 * Order.
+	 */
+	num = uint16_fromregion(&region);
+	isc_region_consume(&region, 2);
+	snprintf(buf, sizeof(buf), "%u", num);
+	RETERR(str_totext(buf, target));
+	RETERR(str_totext(" ", target));
+
+	/*
+	 * Preference.
+	 */
+	num = uint16_fromregion(&region);
+	isc_region_consume(&region, 2);
+	snprintf(buf, sizeof(buf), "%u", num);
+	RETERR(str_totext(buf, target));
+	RETERR(str_totext(" ", target));
+
+	/*
+	 * Flags.
+	 */
+	RETERR(txt_totext(&region, true, target));
+	RETERR(str_totext(" ", target));
+
+	/*
+	 * Service.
+	 */
+	RETERR(txt_totext(&region, true, target));
+	RETERR(str_totext(" ", target));
+
+	/*
+	 * Regexp.
+	 */
+	RETERR(txt_totext(&region, true, target));
+	RETERR(str_totext(" ", target));
+
+	/*
+	 * Replacement.
+	 */
+	dns_name_fromregion(&name, &region);
+	sub = name_prefix(&name, tctx->origin, &prefix);
+	return (dns_name_totext(&prefix, sub, target));
+}
+
+static isc_result_t
+fromwire_naptr(ARGS_FROMWIRE) {
+	dns_name_t name;
+	isc_region_t sr;
+	unsigned char *regex;
+
+	REQUIRE(type == dns_rdatatype_naptr);
+
+	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 isc_result_t
+towire_naptr(ARGS_TOWIRE) {
+	dns_name_t name;
+	dns_offsets_t offsets;
+	isc_region_t sr;
+
+	REQUIRE(rdata->type == dns_rdatatype_naptr);
+	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 int
+compare_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 == dns_rdatatype_naptr);
+	REQUIRE(rdata1->length != 0);
+	REQUIRE(rdata2->length != 0);
+
+	dns_rdata_toregion(rdata1, &region1);
+	dns_rdata_toregion(rdata2, &region2);
+
+	/*
+	 * Order, preference.
+	 */
+	order = memcmp(region1.base, region2.base, 4);
+	if (order != 0) {
+		return (order < 0 ? -1 : 1);
+	}
+	isc_region_consume(&region1, 4);
+	isc_region_consume(&region2, 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(&region1, region1.base[0] + 1);
+	isc_region_consume(&region2, 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(&region1, region1.base[0] + 1);
+	isc_region_consume(&region2, 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(&region1, region1.base[0] + 1);
+	isc_region_consume(&region2, region2.base[0] + 1);
+
+	/*
+	 * Replacement.
+	 */
+	dns_name_init(&name1, NULL);
+	dns_name_init(&name2, NULL);
+
+	dns_name_fromregion(&name1, &region1);
+	dns_name_fromregion(&name2, &region2);
+
+	return (dns_name_rdatacompare(&name1, &name2));
+}
+
+static isc_result_t
+fromstruct_naptr(ARGS_FROMSTRUCT) {
+	dns_rdata_naptr_t *naptr = source;
+	isc_region_t region;
+
+	REQUIRE(type == dns_rdatatype_naptr);
+	REQUIRE(naptr != 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, &region);
+	return (isc_buffer_copyregion(target, &region));
+}
+
+static isc_result_t
+tostruct_naptr(ARGS_TOSTRUCT) {
+	dns_rdata_naptr_t *naptr = target;
+	isc_region_t r;
+	isc_result_t result;
+	dns_name_t name;
+
+	REQUIRE(rdata->type == dns_rdatatype_naptr);
+	REQUIRE(naptr != 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 void
+freestruct_naptr(ARGS_FREESTRUCT) {
+	dns_rdata_naptr_t *naptr = source;
+
+	REQUIRE(naptr != NULL);
+	REQUIRE(naptr->common.rdtype == dns_rdatatype_naptr);
+
+	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 isc_result_t
+additionaldata_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 == dns_rdatatype_naptr);
+
+	/*
+	 * 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 isc_result_t
+digest_naptr(ARGS_DIGEST) {
+	isc_region_t r1, r2;
+	unsigned int length, n;
+	isc_result_t result;
+	dns_name_t name;
+
+	REQUIRE(rdata->type == dns_rdatatype_naptr);
+
+	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 bool
+checkowner_naptr(ARGS_CHECKOWNER) {
+	REQUIRE(type == dns_rdatatype_naptr);
+
+	UNUSED(name);
+	UNUSED(type);
+	UNUSED(rdclass);
+	UNUSED(wildcard);
+
+	return (true);
+}
+
+static bool
+checknames_naptr(ARGS_CHECKNAMES) {
+	REQUIRE(rdata->type == dns_rdatatype_naptr);
+
+	UNUSED(rdata);
+	UNUSED(owner);
+	UNUSED(bad);
+
+	return (true);
+}
+
+static int
+casecompare_naptr(ARGS_COMPARE) {
+	return (compare_naptr(rdata1, rdata2));
+}
+
+#endif /* RDATA_GENERIC_NAPTR_35_C */