minfo_14.c

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/*
 * Copyright (C) 2004, 2007, 2009  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1998-2001  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: minfo_14.c,v 1.47 2009/12/04 22:06:37 tbox Exp $ */

/* reviewed: Wed Mar 15 17:45:32 PST 2000 by brister */

#ifndef RDATA_GENERIC_MINFO_14_C
#define RDATA_GENERIC_MINFO_14_C

#define RRTYPE_MINFO_ATTRIBUTES (0)

static inline isc_result_t
fromtext_minfo(ARGS_FROMTEXT) {
        isc_token_t token;
        dns_name_t name;
        isc_buffer_t buffer;
        int i;
        isc_boolean_t ok;

        REQUIRE(type == 14);

        UNUSED(type);
        UNUSED(rdclass);
        UNUSED(callbacks);

        for (i = 0; i < 2; i++) {
                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_ismailbox(&name);
                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_minfo(ARGS_TOTEXT) {
        isc_region_t region;
        dns_name_t rmail;
        dns_name_t email;
        dns_name_t prefix;
        isc_boolean_t sub;

        REQUIRE(rdata->type == 14);
        REQUIRE(rdata->length != 0);

        dns_name_init(&rmail, NULL);
        dns_name_init(&email, NULL);
        dns_name_init(&prefix, NULL);

        dns_rdata_toregion(rdata, &region);

        dns_name_fromregion(&rmail, &region);
        isc_region_consume(&region, rmail.length);

        dns_name_fromregion(&email, &region);
        isc_region_consume(&region, email.length);

        sub = name_prefix(&rmail, tctx->origin, &prefix);

        RETERR(dns_name_totext(&prefix, sub, target));

        RETERR(str_totext(" ", target));

        sub = name_prefix(&email, tctx->origin, &prefix);
        return (dns_name_totext(&prefix, sub, target));
}

static inline isc_result_t
fromwire_minfo(ARGS_FROMWIRE) {
        dns_name_t rmail;
        dns_name_t email;

        REQUIRE(type == 14);

        UNUSED(type);
        UNUSED(rdclass);

        dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);

        dns_name_init(&rmail, NULL);
        dns_name_init(&email, NULL);

        RETERR(dns_name_fromwire(&rmail, source, dctx, options, target));
        return (dns_name_fromwire(&email, source, dctx, options, target));
}

static inline isc_result_t
towire_minfo(ARGS_TOWIRE) {
        isc_region_t region;
        dns_name_t rmail;
        dns_name_t email;
        dns_offsets_t roffsets;
        dns_offsets_t eoffsets;

        REQUIRE(rdata->type == 14);
        REQUIRE(rdata->length != 0);

        dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);

        dns_name_init(&rmail, roffsets);
        dns_name_init(&email, eoffsets);

        dns_rdata_toregion(rdata, &region);

        dns_name_fromregion(&rmail, &region);
        isc_region_consume(&region, name_length(&rmail));

        RETERR(dns_name_towire(&rmail, cctx, target));

        dns_name_fromregion(&rmail, &region);
        isc_region_consume(&region, rmail.length);

        return (dns_name_towire(&rmail, cctx, target));
}

static inline int
compare_minfo(ARGS_COMPARE) {
        isc_region_t region1;
        isc_region_t region2;
        dns_name_t name1;
        dns_name_t name2;
        int order;

        REQUIRE(rdata1->type == rdata2->type);
        REQUIRE(rdata1->rdclass == rdata2->rdclass);
        REQUIRE(rdata1->type == 14);
        REQUIRE(rdata1->length != 0);
        REQUIRE(rdata2->length != 0);

        dns_name_init(&name1, NULL);
        dns_name_init(&name2, NULL);

        dns_rdata_toregion(rdata1, &region1);
        dns_rdata_toregion(rdata2, &region2);

        dns_name_fromregion(&name1, &region1);
        dns_name_fromregion(&name2, &region2);

        order = dns_name_rdatacompare(&name1, &name2);
        if (order != 0)
                return (order);

        isc_region_consume(&region1, name_length(&name1));
        isc_region_consume(&region2, name_length(&name2));

        dns_name_init(&name1, NULL);
        dns_name_init(&name2, NULL);

        dns_name_fromregion(&name1, &region1);
        dns_name_fromregion(&name2, &region2);

        order = dns_name_rdatacompare(&name1, &name2);
        return (order);
}

static inline isc_result_t
fromstruct_minfo(ARGS_FROMSTRUCT) {
        dns_rdata_minfo_t *minfo = source;
        isc_region_t region;

        REQUIRE(type == 14);
        REQUIRE(source != NULL);
        REQUIRE(minfo->common.rdtype == type);
        REQUIRE(minfo->common.rdclass == rdclass);

        UNUSED(type);
        UNUSED(rdclass);

        dns_name_toregion(&minfo->rmailbox, &region);
        RETERR(isc_buffer_copyregion(target, &region));
        dns_name_toregion(&minfo->emailbox, &region);
        return (isc_buffer_copyregion(target, &region));
}

static inline isc_result_t
tostruct_minfo(ARGS_TOSTRUCT) {
        dns_rdata_minfo_t *minfo = target;
        isc_region_t region;
        dns_name_t name;
        isc_result_t result;

        REQUIRE(rdata->type == 14);
        REQUIRE(target != NULL);
        REQUIRE(rdata->length != 0);

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

        dns_name_init(&name, NULL);
        dns_rdata_toregion(rdata, &region);
        dns_name_fromregion(&name, &region);
        dns_name_init(&minfo->rmailbox, NULL);
        RETERR(name_duporclone(&name, mctx, &minfo->rmailbox));
        isc_region_consume(&region, name_length(&name));

        dns_name_fromregion(&name, &region);
        dns_name_init(&minfo->emailbox, NULL);
        result = name_duporclone(&name, mctx, &minfo->emailbox);
        if (result != ISC_R_SUCCESS)
                goto cleanup;
        minfo->mctx = mctx;
        return (ISC_R_SUCCESS);

 cleanup:
        if (mctx != NULL)
                dns_name_free(&minfo->rmailbox, mctx);
        return (ISC_R_NOMEMORY);
}

static inline void
freestruct_minfo(ARGS_FREESTRUCT) {
        dns_rdata_minfo_t *minfo = source;

        REQUIRE(source != NULL);
        REQUIRE(minfo->common.rdtype == 14);

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

        dns_name_free(&minfo->rmailbox, minfo->mctx);
        dns_name_free(&minfo->emailbox, minfo->mctx);
        minfo->mctx = NULL;
}

static inline isc_result_t
additionaldata_minfo(ARGS_ADDLDATA) {
        REQUIRE(rdata->type == 14);

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

        return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_minfo(ARGS_DIGEST) {
        isc_region_t r;
        dns_name_t name;
        isc_result_t result;

        REQUIRE(rdata->type == 14);

        dns_rdata_toregion(rdata, &r);
        dns_name_init(&name, NULL);
        dns_name_fromregion(&name, &r);
        result = dns_name_digest(&name, digest, arg);
        if (result != ISC_R_SUCCESS)
                return (result);
        isc_region_consume(&r, name_length(&name));
        dns_name_init(&name, NULL);
        dns_name_fromregion(&name, &r);

        return (dns_name_digest(&name, digest, arg));
}

static inline isc_boolean_t
checkowner_minfo(ARGS_CHECKOWNER) {

        REQUIRE(type == 14);

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

        return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_minfo(ARGS_CHECKNAMES) {
        isc_region_t region;
        dns_name_t name;

        REQUIRE(rdata->type == 14);

        UNUSED(owner);

        dns_rdata_toregion(rdata, &region);
        dns_name_init(&name, NULL);
        dns_name_fromregion(&name, &region);
        if (!dns_name_ismailbox(&name)) {
                if (bad != NULL)
                        dns_name_clone(&name, bad);
                return (ISC_FALSE);
        }
        isc_region_consume(&region, name_length(&name));
        dns_name_fromregion(&name, &region);
        if (!dns_name_ismailbox(&name)) {
                if (bad != NULL)
                        dns_name_clone(&name, bad);
                return (ISC_FALSE);
        }
        return (ISC_TRUE);
}

static inline int
casecompare_minfo(ARGS_COMPARE) {
        return (compare_minfo(rdata1, rdata2));
}

#endif  /* RDATA_GENERIC_MINFO_14_C */

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