rdata/generic/tlsa_52.c

	tlsa_52.c revision b0ba1a6059b6d6c4b3aa77d8bc84cc443b981e01
/*
 * Copyright (C) 2012, 2014  Internet Systems Consortium, Inc. ("ISC")
 *
 * 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.
 */

/* $Id$ */

/* rfc6698.txt */

#ifndef RDATA_GENERIC_TLSA_52_C
#define RDATA_GENERIC_TLSA_52_C

#define RRTYPE_TLSA_ATTRIBUTES 0

static inline isc_result_t
fromtext_tlsa(ARGS_FROMTEXT) {
    isc_token_t token;

    REQUIRE(type == dns_rdatatype_tlsa);

    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(origin);
    UNUSED(options);
    UNUSED(callbacks);

    /*
     * Certificate Usage.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffU)
        RETTOK(ISC_R_RANGE);
    RETERR(uint8_tobuffer(token.value.as_ulong, target));

    /*
     * Selector.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffU)
        RETTOK(ISC_R_RANGE);
    RETERR(uint8_tobuffer(token.value.as_ulong, target));

    /*
     * Matching type.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffU)
        RETTOK(ISC_R_RANGE);
    RETERR(uint8_tobuffer(token.value.as_ulong, target));

    /*
     * Certificate Association Data.
     */
    return (isc_hex_tobuffer(lexer, target, -1));
}

static inline isc_result_t
totext_tlsa(ARGS_TOTEXT) {
    isc_region_t sr;
    char buf[sizeof("64000 ")];
    unsigned int n;

    REQUIRE(rdata->type == dns_rdatatype_tlsa);
    REQUIRE(rdata->length != 0);

    UNUSED(tctx);

    dns_rdata_toregion(rdata, &sr);

    /*
     * Certificate Usage.
     */
    n = uint8_fromregion(&sr);
    isc_region_consume(&sr, 1);
    sprintf(buf, "%u ", n);
    RETERR(str_totext(buf, target));

    /*
     * Selector.
     */
    n = uint8_fromregion(&sr);
    isc_region_consume(&sr, 1);
    sprintf(buf, "%u ", n);
    RETERR(str_totext(buf, target));

    /*
     * Matching type.
     */
    n = uint8_fromregion(&sr);
    isc_region_consume(&sr, 1);
    sprintf(buf, "%u", n);
    RETERR(str_totext(buf, target));

    /*
     * Certificate Association Data.
     */
    if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
        RETERR(str_totext(" (", target));
    RETERR(str_totext(tctx->linebreak, target));
    if (tctx->width == 0) /* No splitting */
        RETERR(isc_hex_totext(&sr, 0, "", target));
    else
        RETERR(isc_hex_totext(&sr, tctx->width - 2,
                      tctx->linebreak, target));
    if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
        RETERR(str_totext(" )", target));
    return (ISC_R_SUCCESS);
}

static inline isc_result_t
fromwire_tlsa(ARGS_FROMWIRE) {
    isc_region_t sr;

    REQUIRE(type == dns_rdatatype_tlsa);

    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(dctx);
    UNUSED(options);

    isc_buffer_activeregion(source, &sr);

    if (sr.length < 3)
        return (ISC_R_UNEXPECTEDEND);

    isc_buffer_forward(source, sr.length);
    return (mem_tobuffer(target, sr.base, sr.length));
}

static inline isc_result_t
towire_tlsa(ARGS_TOWIRE) {
    isc_region_t sr;

    REQUIRE(rdata->type == dns_rdatatype_tlsa);
    REQUIRE(rdata->length != 0);

    UNUSED(cctx);

    dns_rdata_toregion(rdata, &sr);
    return (mem_tobuffer(target, sr.base, sr.length));
}

static inline int
compare_tlsa(ARGS_COMPARE) {
    isc_region_t r1;
    isc_region_t r2;

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == dns_rdatatype_tlsa);
    REQUIRE(rdata1->length != 0);
    REQUIRE(rdata2->length != 0);

    dns_rdata_toregion(rdata1, &r1);
    dns_rdata_toregion(rdata2, &r2);
    return (isc_region_compare(&r1, &r2));
}

static inline isc_result_t
fromstruct_tlsa(ARGS_FROMSTRUCT) {
    dns_rdata_tlsa_t *tlsa = source;

    REQUIRE(type == dns_rdatatype_tlsa);
    REQUIRE(source != NULL);
    REQUIRE(tlsa->common.rdtype == type);
    REQUIRE(tlsa->common.rdclass == rdclass);

    UNUSED(type);
    UNUSED(rdclass);

    RETERR(uint8_tobuffer(tlsa->usage, target));
    RETERR(uint8_tobuffer(tlsa->selector, target));
    RETERR(uint8_tobuffer(tlsa->match, target));

    return (mem_tobuffer(target, tlsa->data, tlsa->length));
}

static inline isc_result_t
tostruct_tlsa(ARGS_TOSTRUCT) {
    dns_rdata_tlsa_t *tlsa = target;
    isc_region_t region;

    REQUIRE(rdata->type == dns_rdatatype_tlsa);
    REQUIRE(target != NULL);
    REQUIRE(rdata->length != 0);

    tlsa->common.rdclass = rdata->rdclass;
    tlsa->common.rdtype = rdata->type;
    ISC_LINK_INIT(&tlsa->common, link);

    dns_rdata_toregion(rdata, &region);

    tlsa->usage = uint8_fromregion(&region);
    isc_region_consume(&region, 1);
    tlsa->selector = uint8_fromregion(&region);
    isc_region_consume(&region, 1);
    tlsa->match = uint8_fromregion(&region);
    isc_region_consume(&region, 1);
    tlsa->length = region.length;

    tlsa->data = mem_maybedup(mctx, region.base, region.length);
    if (tlsa->data == NULL)
        return (ISC_R_NOMEMORY);

    tlsa->mctx = mctx;
    return (ISC_R_SUCCESS);
}

static inline void
freestruct_tlsa(ARGS_FREESTRUCT) {
    dns_rdata_tlsa_t *tlsa = source;

    REQUIRE(tlsa != NULL);
    REQUIRE(tlsa->common.rdtype == dns_rdatatype_tlsa);

    if (tlsa->mctx == NULL)
        return;

    if (tlsa->data != NULL)
        isc_mem_free(tlsa->mctx, tlsa->data);
    tlsa->mctx = NULL;
}

static inline isc_result_t
additionaldata_tlsa(ARGS_ADDLDATA) {
    REQUIRE(rdata->type == dns_rdatatype_tlsa);

    UNUSED(rdata);
    UNUSED(add);
    UNUSED(arg);

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_tlsa(ARGS_DIGEST) {
    isc_region_t r;

    REQUIRE(rdata->type == dns_rdatatype_tlsa);

    dns_rdata_toregion(rdata, &r);

    return ((digest)(arg, &r));
}

static inline isc_boolean_t
checkowner_tlsa(ARGS_CHECKOWNER) {

    REQUIRE(type == dns_rdatatype_tlsa);

    UNUSED(name);
    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(wildcard);

    return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_tlsa(ARGS_CHECKNAMES) {

    REQUIRE(rdata->type == dns_rdatatype_tlsa);

    UNUSED(rdata);
    UNUSED(owner);
    UNUSED(bad);

    return (ISC_TRUE);
}

static inline int
casecompare_tlsa(ARGS_COMPARE) {
    return (compare_tlsa(rdata1, rdata2));
}

#endif  /* RDATA_GENERIC_TLSA_52_C */