/contrib/bind9/lib/dns/rdata/in_1/a6_38.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 466 lines · 343 code · 74 blank · 49 comment · 98 complexity · 330897ecea8db0d868c86e8ab5939499 MD5 · raw file
- /*
- * Copyright (C) 2004, 2007, 2009 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1999-2003 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and/or 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 1.56 2009/12/04 22:06:37 tbox 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, ®ion1);
- dns_rdata_toregion(rdata2, ®ion2);
- prefixlen1 = region1.base[0];
- prefixlen2 = region2.base[0];
- isc_region_consume(®ion1, 1);
- isc_region_consume(®ion2, 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(®ion1, octets);
- isc_region_consume(®ion2, octets);
- }
- dns_name_init(&name1, NULL);
- dns_name_init(&name2, NULL);
- dns_name_fromregion(&name1, ®ion1);
- dns_name_fromregion(&name2, ®ion2);
- 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, ®ion);
- return (isc_buffer_copyregion(target, ®ion));
- }
- 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, ®ion);
- prefixlen = uint8_fromregion(®ion);
- if (prefixlen == 0)
- return (ISC_TRUE);
- isc_region_consume(®ion, 1 + 16 - prefixlen / 8);
- dns_name_init(&name, NULL);
- dns_name_fromregion(&name, ®ion);
- if (!dns_name_ishostname(&name, ISC_FALSE)) {
- if (bad != NULL)
- dns_name_clone(&name, bad);
- return (ISC_FALSE);
- }
- return (ISC_TRUE);
- }
- static inline int
- casecompare_in_a6(ARGS_COMPARE) {
- return (compare_in_a6(rdata1, rdata2));
- }
- #endif /* RDATA_IN_1_A6_38_C */