uri_256.c

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/*
 * Copyright (C) 2011, 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.
 */

/* $Id$ */

#ifndef GENERIC_URI_256_C
#define GENERIC_URI_256_C 1

#define RRTYPE_URI_ATTRIBUTES (0)

static inline isc_result_t
fromtext_uri(ARGS_FROMTEXT) {
        isc_token_t token;

        REQUIRE(type == 256);

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

        /*
         * Priority
         */
        RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                                      ISC_FALSE));
        if (token.value.as_ulong > 0xffffU)
                RETTOK(ISC_R_RANGE);
        RETERR(uint16_tobuffer(token.value.as_ulong, target));

        /*
         * Weight
         */
        RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                                      ISC_FALSE));
        if (token.value.as_ulong > 0xffffU)
                RETTOK(ISC_R_RANGE);
        RETERR(uint16_tobuffer(token.value.as_ulong, target));

        /*
         * Target URI
         */
        RETERR(isc_lex_getmastertoken(lexer, &token,
                                      isc_tokentype_qstring, ISC_FALSE));
        if (token.type != isc_tokentype_qstring)
                RETTOK(DNS_R_SYNTAX);
        RETTOK(multitxt_fromtext(&token.value.as_textregion, target));
        return (ISC_R_SUCCESS);
}

static inline isc_result_t
totext_uri(ARGS_TOTEXT) {
        isc_region_t region;
        unsigned short priority, weight;
        char buf[sizeof("65000 ")];

        UNUSED(tctx);

        REQUIRE(rdata->type == 256);
        REQUIRE(rdata->length != 0);

        dns_rdata_toregion(rdata, &region);

        /*
         * Priority
         */
        priority = uint16_fromregion(&region);
        isc_region_consume(&region, 2);
        sprintf(buf, "%u ", priority);
        RETERR(str_totext(buf, target));

        /*
         * Weight
         */
        weight = uint16_fromregion(&region);
        isc_region_consume(&region, 2);
        sprintf(buf, "%u ", weight);
        RETERR(str_totext(buf, target));

        /*
         * Target URI
         */
        RETERR(multitxt_totext(&region, target));
        return (ISC_R_SUCCESS);
}

static inline isc_result_t
fromwire_uri(ARGS_FROMWIRE) {
        isc_region_t region;

        REQUIRE(type == 256);

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

        /*
         * Priority, weight
         */
        isc_buffer_activeregion(source, &region);
        if (region.length < 4)
                return (ISC_R_UNEXPECTEDEND);

        /*
         * Priority, weight and target URI
         */
        isc_buffer_forward(source, region.length);
        return (mem_tobuffer(target, region.base, region.length));
}

static inline isc_result_t
towire_uri(ARGS_TOWIRE) {
        isc_region_t region;

        REQUIRE(rdata->type == 256);
        REQUIRE(rdata->length != 0);

        UNUSED(cctx);

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

static inline int
compare_uri(ARGS_COMPARE) {
        isc_region_t r1;
        isc_region_t r2;
        int order;

        REQUIRE(rdata1->type == rdata2->type);
        REQUIRE(rdata1->rdclass == rdata2->rdclass);
        REQUIRE(rdata1->type == 256);
        REQUIRE(rdata1->length != 0);
        REQUIRE(rdata2->length != 0);

        dns_rdata_toregion(rdata1, &r1);
        dns_rdata_toregion(rdata2, &r2);

        /*
         * Priority
         */
        order = memcmp(r1.base, r2.base, 2);
        if (order != 0)
                return (order < 0 ? -1 : 1);
        isc_region_consume(&r1, 2);
        isc_region_consume(&r2, 2);

        /*
         * Weight
         */
        order = memcmp(r1.base, r2.base, 2);
        if (order != 0)
                return (order < 0 ? -1 : 1);
        isc_region_consume(&r1, 2);
        isc_region_consume(&r2, 2);

        return (isc_region_compare(&r1, &r2));
}

static inline isc_result_t
fromstruct_uri(ARGS_FROMSTRUCT) {
        dns_rdata_uri_t *uri = source;

        REQUIRE(type == 256);
        REQUIRE(source != NULL);
        REQUIRE(uri->common.rdtype == type);
        REQUIRE(uri->common.rdclass == rdclass);
        REQUIRE(uri->target != NULL && uri->tgt_len != 0);

        UNUSED(type);
        UNUSED(rdclass);

        /*
         * Priority
         */
        RETERR(uint16_tobuffer(uri->priority, target));

        /*
         * Weight
         */
        RETERR(uint16_tobuffer(uri->weight, target));

        /*
         * Target URI
         */
        return (mem_tobuffer(target, uri->target, uri->tgt_len));
}

static inline isc_result_t
tostruct_uri(ARGS_TOSTRUCT) {
        dns_rdata_uri_t *uri = target;
        isc_region_t sr;

        REQUIRE(rdata->type == 256);
        REQUIRE(target != NULL);
        REQUIRE(rdata->length != 0);

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

        dns_rdata_toregion(rdata, &sr);

        /*
         * Priority
         */
        if (sr.length < 2)
                return (ISC_R_UNEXPECTEDEND);
        uri->priority = uint16_fromregion(&sr);
        isc_region_consume(&sr, 2);

        /*
         * Weight
         */
        if (sr.length < 2)
                return (ISC_R_UNEXPECTEDEND);
        uri->weight = uint16_fromregion(&sr);
        isc_region_consume(&sr, 2);

        /*
         * Target URI
         */
        uri->tgt_len = sr.length;
        uri->target = mem_maybedup(mctx, sr.base, sr.length);
        if (uri->target == NULL)
                return (ISC_R_NOMEMORY);

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

static inline void
freestruct_uri(ARGS_FREESTRUCT) {
        dns_rdata_uri_t *uri = (dns_rdata_uri_t *) source;

        REQUIRE(source != NULL);
        REQUIRE(uri->common.rdtype == 256);

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

        if (uri->target != NULL)
                isc_mem_free(uri->mctx, uri->target);
        uri->mctx = NULL;
}

static inline isc_result_t
additionaldata_uri(ARGS_ADDLDATA) {
        REQUIRE(rdata->type == 256);

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

        return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_uri(ARGS_DIGEST) {
        isc_region_t r;

        REQUIRE(rdata->type == 256);

        dns_rdata_toregion(rdata, &r);

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

static inline isc_boolean_t
checkowner_uri(ARGS_CHECKOWNER) {

        REQUIRE(type == 256);

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

        return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_uri(ARGS_CHECKNAMES) {

        REQUIRE(rdata->type == 256);

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

        return (ISC_TRUE);
}

static inline int
casecompare_uri(ARGS_COMPARE) {
        return (compare_uri(rdata1, rdata2));
}

#endif /* GENERIC_URI_256_C */

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