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Diffstat (limited to 'lib/dns/rdata/in_1/a6_38.c')
-rw-r--r--lib/dns/rdata/in_1/a6_38.c461
1 files changed, 461 insertions, 0 deletions
diff --git a/lib/dns/rdata/in_1/a6_38.c b/lib/dns/rdata/in_1/a6_38.c
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+/*
+ * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 1999-2003 Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and 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: a6_38.c,v 1.52 2004/03/05 05:10:23 marka Exp $ */
+
+/* RFC2874 */
+
+#ifndef RDATA_IN_1_A6_28_C
+#define RDATA_IN_1_A6_28_C
+
+#include <isc/net.h>
+
+#define RRTYPE_A6_ATTRIBUTES (0)
+
+static inline isc_result_t
+fromtext_in_a6(ARGS_FROMTEXT) {
+ isc_token_t token;
+ unsigned char addr[16];
+ unsigned char prefixlen;
+ unsigned char octets;
+ unsigned char mask;
+ dns_name_t name;
+ isc_buffer_t buffer;
+ isc_boolean_t ok;
+
+ REQUIRE(type == 38);
+ REQUIRE(rdclass == 1);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+ UNUSED(callbacks);
+
+ /*
+ * Prefix length.
+ */
+ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
+ ISC_FALSE));
+ if (token.value.as_ulong > 128U)
+ RETTOK(ISC_R_RANGE);
+
+ prefixlen = (unsigned char)token.value.as_ulong;
+ RETERR(mem_tobuffer(target, &prefixlen, 1));
+
+ /*
+ * Suffix.
+ */
+ if (prefixlen != 128) {
+ /*
+ * Prefix 0..127.
+ */
+ octets = prefixlen/8;
+ /*
+ * Octets 0..15.
+ */
+ RETERR(isc_lex_getmastertoken(lexer, &token,
+ isc_tokentype_string,
+ ISC_FALSE));
+ if (inet_pton(AF_INET6, DNS_AS_STR(token), addr) != 1)
+ RETTOK(DNS_R_BADAAAA);
+ mask = 0xff >> (prefixlen % 8);
+ addr[octets] &= mask;
+ RETERR(mem_tobuffer(target, &addr[octets], 16 - octets));
+ }
+
+ if (prefixlen == 0)
+ return (ISC_R_SUCCESS);
+
+ 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));
+ ok = ISC_TRUE;
+ if ((options & DNS_RDATA_CHECKNAMES) != 0)
+ ok = dns_name_ishostname(&name, ISC_FALSE);
+ if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0)
+ RETTOK(DNS_R_BADNAME);
+ if (!ok && callbacks != NULL)
+ warn_badname(&name, lexer, callbacks);
+ return (ISC_R_SUCCESS);
+}
+
+static inline isc_result_t
+totext_in_a6(ARGS_TOTEXT) {
+ isc_region_t sr, ar;
+ unsigned char addr[16];
+ unsigned char prefixlen;
+ unsigned char octets;
+ unsigned char mask;
+ char buf[sizeof("128")];
+ dns_name_t name;
+ dns_name_t prefix;
+ isc_boolean_t sub;
+
+ REQUIRE(rdata->type == 38);
+ REQUIRE(rdata->rdclass == 1);
+ REQUIRE(rdata->length != 0);
+
+ dns_rdata_toregion(rdata, &sr);
+ prefixlen = sr.base[0];
+ INSIST(prefixlen <= 128);
+ isc_region_consume(&sr, 1);
+ sprintf(buf, "%u", prefixlen);
+ RETERR(str_totext(buf, target));
+ RETERR(str_totext(" ", target));
+
+ if (prefixlen != 128) {
+ octets = prefixlen/8;
+ memset(addr, 0, sizeof(addr));
+ memcpy(&addr[octets], sr.base, 16 - octets);
+ mask = 0xff >> (prefixlen % 8);
+ addr[octets] &= mask;
+ ar.base = addr;
+ ar.length = sizeof(addr);
+ RETERR(inet_totext(AF_INET6, &ar, target));
+ isc_region_consume(&sr, 16 - octets);
+ }
+
+ if (prefixlen == 0)
+ return (ISC_R_SUCCESS);
+
+ RETERR(str_totext(" ", target));
+ dns_name_init(&name, NULL);
+ dns_name_init(&prefix, NULL);
+ dns_name_fromregion(&name, &sr);
+ sub = name_prefix(&name, tctx->origin, &prefix);
+ return (dns_name_totext(&prefix, sub, target));
+}
+
+static inline isc_result_t
+fromwire_in_a6(ARGS_FROMWIRE) {
+ isc_region_t sr;
+ unsigned char prefixlen;
+ unsigned char octets;
+ unsigned char mask;
+ dns_name_t name;
+
+ REQUIRE(type == 38);
+ REQUIRE(rdclass == 1);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+
+ dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
+
+ isc_buffer_activeregion(source, &sr);
+ /*
+ * Prefix length.
+ */
+ if (sr.length < 1)
+ return (ISC_R_UNEXPECTEDEND);
+ prefixlen = sr.base[0];
+ if (prefixlen > 128)
+ return (ISC_R_RANGE);
+ isc_region_consume(&sr, 1);
+ RETERR(mem_tobuffer(target, &prefixlen, 1));
+ isc_buffer_forward(source, 1);
+
+ /*
+ * Suffix.
+ */
+ if (prefixlen != 128) {
+ octets = 16 - prefixlen / 8;
+ if (sr.length < octets)
+ return (ISC_R_UNEXPECTEDEND);
+ mask = 0xff >> (prefixlen % 8);
+ sr.base[0] &= mask; /* Ensure pad bits are zero. */
+ RETERR(mem_tobuffer(target, sr.base, octets));
+ isc_buffer_forward(source, octets);
+ }
+
+ if (prefixlen == 0)
+ return (ISC_R_SUCCESS);
+
+ dns_name_init(&name, NULL);
+ return (dns_name_fromwire(&name, source, dctx, options, target));
+}
+
+static inline isc_result_t
+towire_in_a6(ARGS_TOWIRE) {
+ isc_region_t sr;
+ dns_name_t name;
+ dns_offsets_t offsets;
+ unsigned char prefixlen;
+ unsigned char octets;
+
+ REQUIRE(rdata->type == 38);
+ REQUIRE(rdata->rdclass == 1);
+ REQUIRE(rdata->length != 0);
+
+ dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
+ dns_rdata_toregion(rdata, &sr);
+ prefixlen = sr.base[0];
+ INSIST(prefixlen <= 128);
+
+ octets = 1 + 16 - prefixlen / 8;
+ RETERR(mem_tobuffer(target, sr.base, octets));
+ isc_region_consume(&sr, octets);
+
+ if (prefixlen == 0)
+ return (ISC_R_SUCCESS);
+
+ dns_name_init(&name, offsets);
+ dns_name_fromregion(&name, &sr);
+ return (dns_name_towire(&name, cctx, target));
+}
+
+static inline int
+compare_in_a6(ARGS_COMPARE) {
+ int order;
+ unsigned char prefixlen1, prefixlen2;
+ unsigned char octets;
+ dns_name_t name1;
+ dns_name_t name2;
+ isc_region_t region1;
+ isc_region_t region2;
+
+ REQUIRE(rdata1->type == rdata2->type);
+ REQUIRE(rdata1->rdclass == rdata2->rdclass);
+ REQUIRE(rdata1->type == 38);
+ REQUIRE(rdata1->rdclass == 1);
+ REQUIRE(rdata1->length != 0);
+ REQUIRE(rdata2->length != 0);
+
+ dns_rdata_toregion(rdata1, &region1);
+ dns_rdata_toregion(rdata2, &region2);
+ prefixlen1 = region1.base[0];
+ prefixlen2 = region2.base[0];
+ isc_region_consume(&region1, 1);
+ isc_region_consume(&region2, 1);
+ if (prefixlen1 < prefixlen2)
+ return (-1);
+ else if (prefixlen1 > prefixlen2)
+ return (1);
+ /*
+ * Prefix lengths are equal.
+ */
+ octets = 16 - prefixlen1 / 8;
+
+ if (octets > 0) {
+ order = memcmp(region1.base, region2.base, octets);
+ if (order < 0)
+ return (-1);
+ else if (order > 0)
+ return (1);
+ /*
+ * Address suffixes are equal.
+ */
+ if (prefixlen1 == 0)
+ return (order);
+ isc_region_consume(&region1, octets);
+ isc_region_consume(&region2, octets);
+ }
+
+ 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 inline isc_result_t
+fromstruct_in_a6(ARGS_FROMSTRUCT) {
+ dns_rdata_in_a6_t *a6 = source;
+ isc_region_t region;
+ int octets;
+ isc_uint8_t bits;
+ isc_uint8_t first;
+ isc_uint8_t mask;
+
+ REQUIRE(type == 38);
+ REQUIRE(rdclass == 1);
+ REQUIRE(source != NULL);
+ REQUIRE(a6->common.rdtype == type);
+ REQUIRE(a6->common.rdclass == rdclass);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+
+ if (a6->prefixlen > 128)
+ return (ISC_R_RANGE);
+
+ RETERR(uint8_tobuffer(a6->prefixlen, target));
+
+ /* Suffix */
+ if (a6->prefixlen != 128) {
+ octets = 16 - a6->prefixlen / 8;
+ bits = a6->prefixlen % 8;
+ if (bits != 0) {
+ mask = 0xffU >> bits;
+ first = a6->in6_addr.s6_addr[16 - octets] & mask;
+ RETERR(uint8_tobuffer(first, target));
+ octets--;
+ }
+ if (octets > 0)
+ RETERR(mem_tobuffer(target,
+ a6->in6_addr.s6_addr + 16 - octets,
+ octets));
+ }
+
+ if (a6->prefixlen == 0)
+ return (ISC_R_SUCCESS);
+ dns_name_toregion(&a6->prefix, &region);
+ return (isc_buffer_copyregion(target, &region));
+}
+
+static inline isc_result_t
+tostruct_in_a6(ARGS_TOSTRUCT) {
+ dns_rdata_in_a6_t *a6 = target;
+ unsigned char octets;
+ dns_name_t name;
+ isc_region_t r;
+
+ REQUIRE(rdata->type == 38);
+ REQUIRE(rdata->rdclass == 1);
+ REQUIRE(target != NULL);
+ REQUIRE(rdata->length != 0);
+
+ a6->common.rdclass = rdata->rdclass;
+ a6->common.rdtype = rdata->type;
+ ISC_LINK_INIT(&a6->common, link);
+
+ dns_rdata_toregion(rdata, &r);
+
+ a6->prefixlen = uint8_fromregion(&r);
+ isc_region_consume(&r, 1);
+ memset(a6->in6_addr.s6_addr, 0, sizeof(a6->in6_addr.s6_addr));
+
+ /*
+ * Suffix.
+ */
+ if (a6->prefixlen != 128) {
+ octets = 16 - a6->prefixlen / 8;
+ INSIST(r.length >= octets);
+ memcpy(a6->in6_addr.s6_addr + 16 - octets, r.base, octets);
+ isc_region_consume(&r, octets);
+ }
+
+ /*
+ * Prefix.
+ */
+ dns_name_init(&a6->prefix, NULL);
+ if (a6->prefixlen != 0) {
+ dns_name_init(&name, NULL);
+ dns_name_fromregion(&name, &r);
+ RETERR(name_duporclone(&name, mctx, &a6->prefix));
+ }
+ a6->mctx = mctx;
+ return (ISC_R_SUCCESS);
+}
+
+static inline void
+freestruct_in_a6(ARGS_FREESTRUCT) {
+ dns_rdata_in_a6_t *a6 = source;
+
+ REQUIRE(source != NULL);
+ REQUIRE(a6->common.rdclass == 1);
+ REQUIRE(a6->common.rdtype == 38);
+
+ if (a6->mctx == NULL)
+ return;
+
+ if (dns_name_dynamic(&a6->prefix))
+ dns_name_free(&a6->prefix, a6->mctx);
+ a6->mctx = NULL;
+}
+
+static inline isc_result_t
+additionaldata_in_a6(ARGS_ADDLDATA) {
+ REQUIRE(rdata->type == 38);
+ REQUIRE(rdata->rdclass == 1);
+
+ UNUSED(rdata);
+ UNUSED(add);
+ UNUSED(arg);
+
+ return (ISC_R_SUCCESS);
+}
+
+static inline isc_result_t
+digest_in_a6(ARGS_DIGEST) {
+ isc_region_t r1, r2;
+ unsigned char prefixlen, octets;
+ isc_result_t result;
+ dns_name_t name;
+
+ REQUIRE(rdata->type == 38);
+ REQUIRE(rdata->rdclass == 1);
+
+ dns_rdata_toregion(rdata, &r1);
+ r2 = r1;
+ prefixlen = r1.base[0];
+ octets = 1 + 16 - prefixlen / 8;
+
+ r1.length = octets;
+ result = (digest)(arg, &r1);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+ if (prefixlen == 0)
+ return (ISC_R_SUCCESS);
+
+ isc_region_consume(&r2, octets);
+ dns_name_init(&name, NULL);
+ dns_name_fromregion(&name, &r2);
+ return (dns_name_digest(&name, digest, arg));
+}
+
+static inline isc_boolean_t
+checkowner_in_a6(ARGS_CHECKOWNER) {
+
+ REQUIRE(type == 38);
+ REQUIRE(rdclass == 1);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+
+ return (dns_name_ishostname(name, wildcard));
+}
+
+static inline isc_boolean_t
+checknames_in_a6(ARGS_CHECKNAMES) {
+ isc_region_t region;
+ dns_name_t name;
+ unsigned int prefixlen;
+
+ REQUIRE(rdata->type == 38);
+ REQUIRE(rdata->rdclass == 1);
+
+ UNUSED(owner);
+
+ dns_rdata_toregion(rdata, &region);
+ prefixlen = uint8_fromregion(&region);
+ if (prefixlen == 0)
+ return (ISC_TRUE);
+ isc_region_consume(&region, 1 + 16 - prefixlen / 8);
+ dns_name_init(&name, NULL);
+ dns_name_fromregion(&name, &region);
+ if (!dns_name_ishostname(&name, ISC_FALSE)) {
+ if (bad != NULL)
+ dns_name_clone(&name, bad);
+ return (ISC_FALSE);
+ }
+ return (ISC_TRUE);
+}
+
+#endif /* RDATA_IN_1_A6_38_C */
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