diff options
Diffstat (limited to 'lib/dns/rdata/generic/opt_41.c')
| -rw-r--r-- | lib/dns/rdata/generic/opt_41.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/opt_41.c b/lib/dns/rdata/generic/opt_41.c new file mode 100644 index 0000000..d2cfc2e --- /dev/null +++ b/lib/dns/rdata/generic/opt_41.c @@ -0,0 +1,280 @@ +/* + * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 1998-2002 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: opt_41.c,v 1.33 2007/06/19 23:47:17 tbox Exp $ */ + +/* Reviewed: Thu Mar 16 14:06:44 PST 2000 by gson */ + +/* RFC2671 */ + +#ifndef RDATA_GENERIC_OPT_41_C +#define RDATA_GENERIC_OPT_41_C + +#define RRTYPE_OPT_ATTRIBUTES (DNS_RDATATYPEATTR_SINGLETON | \ + DNS_RDATATYPEATTR_META | \ + DNS_RDATATYPEATTR_NOTQUESTION) + +static inline isc_result_t +fromtext_opt(ARGS_FROMTEXT) { + /* + * OPT records do not have a text format. + */ + + REQUIRE(type == 41); + + UNUSED(type); + UNUSED(rdclass); + UNUSED(lexer); + UNUSED(origin); + UNUSED(options); + UNUSED(target); + UNUSED(callbacks); + + return (ISC_R_NOTIMPLEMENTED); +} + +static inline isc_result_t +totext_opt(ARGS_TOTEXT) { + isc_region_t r; + isc_region_t or; + isc_uint16_t option; + isc_uint16_t length; + char buf[sizeof("64000 64000")]; + + /* + * OPT records do not have a text format. + */ + + REQUIRE(rdata->type == 41); + + dns_rdata_toregion(rdata, &r); + while (r.length > 0) { + option = uint16_fromregion(&r); + isc_region_consume(&r, 2); + length = uint16_fromregion(&r); + isc_region_consume(&r, 2); + sprintf(buf, "%u %u", option, length); + RETERR(str_totext(buf, target)); + INSIST(r.length >= length); + if (length > 0) { + if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) + RETERR(str_totext(" (", target)); + RETERR(str_totext(tctx->linebreak, target)); + or = r; + or.length = length; + RETERR(isc_base64_totext(&or, tctx->width - 2, + tctx->linebreak, target)); + isc_region_consume(&r, length); + if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) + RETERR(str_totext(" )", target)); + } + if (r.length > 0) + RETERR(str_totext(" ", target)); + } + + return (ISC_R_SUCCESS); +} + +static inline isc_result_t +fromwire_opt(ARGS_FROMWIRE) { + isc_region_t sregion; + isc_region_t tregion; + isc_uint16_t length; + unsigned int total; + + REQUIRE(type == 41); + + UNUSED(type); + UNUSED(rdclass); + UNUSED(dctx); + UNUSED(options); + + isc_buffer_activeregion(source, &sregion); + total = 0; + while (sregion.length != 0) { + if (sregion.length < 4) + return (ISC_R_UNEXPECTEDEND); + /* + * Eat the 16bit option code. There is nothing to + * be done with it currently. + */ + isc_region_consume(&sregion, 2); + length = uint16_fromregion(&sregion); + isc_region_consume(&sregion, 2); + total += 4; + if (sregion.length < length) + return (ISC_R_UNEXPECTEDEND); + isc_region_consume(&sregion, length); + total += length; + } + + isc_buffer_activeregion(source, &sregion); + isc_buffer_availableregion(target, &tregion); + if (tregion.length < total) + return (ISC_R_NOSPACE); + memcpy(tregion.base, sregion.base, total); + isc_buffer_forward(source, total); + isc_buffer_add(target, total); + + return (ISC_R_SUCCESS); +} + +static inline isc_result_t +towire_opt(ARGS_TOWIRE) { + + REQUIRE(rdata->type == 41); + + UNUSED(cctx); + + return (mem_tobuffer(target, rdata->data, rdata->length)); +} + +static inline int +compare_opt(ARGS_COMPARE) { + isc_region_t r1; + isc_region_t r2; + + REQUIRE(rdata1->type == rdata2->type); + REQUIRE(rdata1->rdclass == rdata2->rdclass); + REQUIRE(rdata1->type == 41); + + dns_rdata_toregion(rdata1, &r1); + dns_rdata_toregion(rdata2, &r2); + return (isc_region_compare(&r1, &r2)); +} + +static inline isc_result_t +fromstruct_opt(ARGS_FROMSTRUCT) { + dns_rdata_opt_t *opt = source; + isc_region_t region; + isc_uint16_t length; + + REQUIRE(type == 41); + REQUIRE(source != NULL); + REQUIRE(opt->common.rdtype == type); + REQUIRE(opt->common.rdclass == rdclass); + REQUIRE(opt->options != NULL || opt->length == 0); + + UNUSED(type); + UNUSED(rdclass); + + region.base = opt->options; + region.length = opt->length; + while (region.length >= 4) { + isc_region_consume(®ion, 2); /* opt */ + length = uint16_fromregion(®ion); + isc_region_consume(®ion, 2); + if (region.length < length) + return (ISC_R_UNEXPECTEDEND); + isc_region_consume(®ion, length); + } + if (region.length != 0) + return (ISC_R_UNEXPECTEDEND); + + return (mem_tobuffer(target, opt->options, opt->length)); +} + +static inline isc_result_t +tostruct_opt(ARGS_TOSTRUCT) { + dns_rdata_opt_t *opt = target; + isc_region_t r; + + REQUIRE(rdata->type == 41); + REQUIRE(target != NULL); + + opt->common.rdclass = rdata->rdclass; + opt->common.rdtype = rdata->type; + ISC_LINK_INIT(&opt->common, link); + + dns_rdata_toregion(rdata, &r); + opt->length = r.length; + opt->options = mem_maybedup(mctx, r.base, r.length); + if (opt->options == NULL) + return (ISC_R_NOMEMORY); + + opt->offset = 0; + opt->mctx = mctx; + return (ISC_R_SUCCESS); +} + +static inline void +freestruct_opt(ARGS_FREESTRUCT) { + dns_rdata_opt_t *opt = source; + + REQUIRE(source != NULL); + REQUIRE(opt->common.rdtype == 41); + + if (opt->mctx == NULL) + return; + + if (opt->options != NULL) + isc_mem_free(opt->mctx, opt->options); + opt->mctx = NULL; +} + +static inline isc_result_t +additionaldata_opt(ARGS_ADDLDATA) { + REQUIRE(rdata->type == 41); + + UNUSED(rdata); + UNUSED(add); + UNUSED(arg); + + return (ISC_R_SUCCESS); +} + +static inline isc_result_t +digest_opt(ARGS_DIGEST) { + + /* + * OPT records are not digested. + */ + + REQUIRE(rdata->type == 41); + + UNUSED(rdata); + UNUSED(digest); + UNUSED(arg); + + return (ISC_R_NOTIMPLEMENTED); +} + +static inline isc_boolean_t +checkowner_opt(ARGS_CHECKOWNER) { + + REQUIRE(type == 41); + + UNUSED(type); + UNUSED(rdclass); + UNUSED(wildcard); + + return (dns_name_equal(name, dns_rootname)); +} + +static inline isc_boolean_t +checknames_opt(ARGS_CHECKNAMES) { + + REQUIRE(rdata->type == 41); + + UNUSED(rdata); + UNUSED(owner); + UNUSED(bad); + + return (ISC_TRUE); +} + +#endif /* RDATA_GENERIC_OPT_41_C */ |