diff options
Diffstat (limited to 'lib/dns/rdata/in_1/a6_38.c')
| -rw-r--r-- | lib/dns/rdata/in_1/a6_38.c | 461 |
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 new file mode 100644 index 0000000..d4d42bb --- /dev/null +++ b/lib/dns/rdata/in_1/a6_38.c @@ -0,0 +1,461 @@ +/* + * Copyright (C) 2004, 2007 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 1.54 2007/06/19 23:47:17 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); +} + +#endif /* RDATA_IN_1_A6_38_C */ |