isdn_20.c

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/*
 * Copyright (C) 2004, 2005, 2007, 2009, 2013, 2014  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1999-2002  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: isdn_20.c,v 1.40 2009/12/04 22:06:37 tbox Exp $ */

/* Reviewed: Wed Mar 15 16:53:11 PST 2000 by bwelling */

/* RFC1183 */

#ifndef RDATA_GENERIC_ISDN_20_C
#define RDATA_GENERIC_ISDN_20_C

#define RRTYPE_ISDN_ATTRIBUTES (0)

static inline isc_result_t
fromtext_isdn(ARGS_FROMTEXT) {
        isc_token_t token;

        REQUIRE(type == 20);

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

        /* ISDN-address */
        RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring,
                                      ISC_FALSE));
        RETTOK(txt_fromtext(&token.value.as_textregion, target));

        /* sa: optional */
        RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring,
                                      ISC_TRUE));
        if (token.type != isc_tokentype_string &&
            token.type != isc_tokentype_qstring) {
                isc_lex_ungettoken(lexer, &token);
                return (ISC_R_SUCCESS);
        }
        RETTOK(txt_fromtext(&token.value.as_textregion, target));
        return (ISC_R_SUCCESS);
}

static inline isc_result_t
totext_isdn(ARGS_TOTEXT) {
        isc_region_t region;

        REQUIRE(rdata->type == 20);
        REQUIRE(rdata->length != 0);

        UNUSED(tctx);

        dns_rdata_toregion(rdata, &region);
        RETERR(txt_totext(&region, ISC_TRUE, target));
        if (region.length == 0)
                return (ISC_R_SUCCESS);
        RETERR(str_totext(" ", target));
        return (txt_totext(&region, ISC_TRUE, target));
}

static inline isc_result_t
fromwire_isdn(ARGS_FROMWIRE) {
        REQUIRE(type == 20);

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

        RETERR(txt_fromwire(source, target));
        if (buffer_empty(source))
                return (ISC_R_SUCCESS);
        return (txt_fromwire(source, target));
}

static inline isc_result_t
towire_isdn(ARGS_TOWIRE) {
        UNUSED(cctx);

        REQUIRE(rdata->type == 20);
        REQUIRE(rdata->length != 0);

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

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

        REQUIRE(rdata1->type == rdata2->type);
        REQUIRE(rdata1->rdclass == rdata2->rdclass);
        REQUIRE(rdata1->type == 20);
        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_isdn(ARGS_FROMSTRUCT) {
        dns_rdata_isdn_t *isdn = source;

        REQUIRE(type == 20);
        REQUIRE(source != NULL);
        REQUIRE(isdn->common.rdtype == type);
        REQUIRE(isdn->common.rdclass == rdclass);

        UNUSED(type);
        UNUSED(rdclass);

        RETERR(uint8_tobuffer(isdn->isdn_len, target));
        RETERR(mem_tobuffer(target, isdn->isdn, isdn->isdn_len));
        if (isdn->subaddress == NULL)
                return (ISC_R_SUCCESS);
        RETERR(uint8_tobuffer(isdn->subaddress_len, target));
        return (mem_tobuffer(target, isdn->subaddress, isdn->subaddress_len));
}

static inline isc_result_t
tostruct_isdn(ARGS_TOSTRUCT) {
        dns_rdata_isdn_t *isdn = target;
        isc_region_t r;

        REQUIRE(rdata->type == 20);
        REQUIRE(target != NULL);
        REQUIRE(rdata->length != 0);

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

        dns_rdata_toregion(rdata, &r);

        isdn->isdn_len = uint8_fromregion(&r);
        isc_region_consume(&r, 1);
        isdn->isdn = mem_maybedup(mctx, r.base, isdn->isdn_len);
        if (isdn->isdn == NULL)
                return (ISC_R_NOMEMORY);
        isc_region_consume(&r, isdn->isdn_len);

        if (r.length == 0) {
                isdn->subaddress_len = 0;
                isdn->subaddress = NULL;
        } else {
                isdn->subaddress_len = uint8_fromregion(&r);
                isc_region_consume(&r, 1);
                isdn->subaddress = mem_maybedup(mctx, r.base,
                                                isdn->subaddress_len);
                if (isdn->subaddress == NULL)
                        goto cleanup;
        }

        isdn->mctx = mctx;
        return (ISC_R_SUCCESS);

 cleanup:
        if (mctx != NULL && isdn->isdn != NULL)
                isc_mem_free(mctx, isdn->isdn);
        return (ISC_R_NOMEMORY);
}

static inline void
freestruct_isdn(ARGS_FREESTRUCT) {
        dns_rdata_isdn_t *isdn = source;

        REQUIRE(source != NULL);

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

        if (isdn->isdn != NULL)
                isc_mem_free(isdn->mctx, isdn->isdn);
        if (isdn->subaddress != NULL)
                isc_mem_free(isdn->mctx, isdn->subaddress);
        isdn->mctx = NULL;
}

static inline isc_result_t
additionaldata_isdn(ARGS_ADDLDATA) {
        REQUIRE(rdata->type == 20);

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

        return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_isdn(ARGS_DIGEST) {
        isc_region_t r;

        REQUIRE(rdata->type == 20);

        dns_rdata_toregion(rdata, &r);

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

static inline isc_boolean_t
checkowner_isdn(ARGS_CHECKOWNER) {

        REQUIRE(type == 20);

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

        return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_isdn(ARGS_CHECKNAMES) {

        REQUIRE(rdata->type == 20);

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

        return (ISC_TRUE);
}

static inline int
casecompare_isdn(ARGS_COMPARE) {
        return (compare_isdn(rdata1, rdata2));
}

#endif  /* RDATA_GENERIC_ISDN_20_C */

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