soa_6.c

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/*
 * Copyright (C) 2004, 2007, 2009, 2011, 2012, 2014, 2015  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.
 */

/* $Id$ */

/* Reviewed: Thu Mar 16 15:18:32 PST 2000 by explorer */

#ifndef RDATA_GENERIC_SOA_6_C
#define RDATA_GENERIC_SOA_6_C

#define RRTYPE_SOA_ATTRIBUTES (DNS_RDATATYPEATTR_SINGLETON)

static inline isc_result_t
fromtext_soa(ARGS_FROMTEXT) {
        isc_token_t token;
        dns_name_t name;
        isc_buffer_t buffer;
        int i;
        isc_uint32_t n;
        isc_boolean_t ok;

        REQUIRE(type == 6);

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

        origin = (origin != NULL) ? origin : dns_rootname;

        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);
                RETTOK(dns_name_fromtext(&name, &buffer, origin,
                                         options, target));
                ok = ISC_TRUE;
                if ((options & DNS_RDATA_CHECKNAMES) != 0)
                        switch (i) {
                        case 0:
                                ok = dns_name_ishostname(&name, ISC_FALSE);
                                break;
                        case 1:
                                ok = dns_name_ismailbox(&name);
                                break;

                        }
                if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0)
                        RETTOK(DNS_R_BADNAME);
                if (!ok && callbacks != NULL)
                        warn_badname(&name, lexer, callbacks);
        }

        RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                                      ISC_FALSE));
        RETERR(uint32_tobuffer(token.value.as_ulong, target));

        for (i = 0; i < 4; i++) {
                RETERR(isc_lex_getmastertoken(lexer, &token,
                                              isc_tokentype_string,
                                              ISC_FALSE));
                RETTOK(dns_counter_fromtext(&token.value.as_textregion, &n));
                RETERR(uint32_tobuffer(n, target));
        }

        return (ISC_R_SUCCESS);
}

static const char *soa_fieldnames[5] = {
        "serial", "refresh", "retry", "expire", "minimum"
};

static inline isc_result_t
totext_soa(ARGS_TOTEXT) {
        isc_region_t dregion;
        dns_name_t mname;
        dns_name_t rname;
        dns_name_t prefix;
        isc_boolean_t sub;
        int i;
        isc_boolean_t multiline;
        isc_boolean_t comm;

        REQUIRE(rdata->type == 6);
        REQUIRE(rdata->length != 0);

        multiline = ISC_TF((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0);
        if (multiline)
                comm = ISC_TF((tctx->flags & DNS_STYLEFLAG_RRCOMMENT) != 0);
        else
                comm = ISC_FALSE;


        dns_name_init(&mname, NULL);
        dns_name_init(&rname, NULL);
        dns_name_init(&prefix, NULL);

        dns_rdata_toregion(rdata, &dregion);

        dns_name_fromregion(&mname, &dregion);
        isc_region_consume(&dregion, name_length(&mname));

        dns_name_fromregion(&rname, &dregion);
        isc_region_consume(&dregion, name_length(&rname));

        sub = name_prefix(&mname, tctx->origin, &prefix);
        RETERR(dns_name_totext(&prefix, sub, target));

        RETERR(str_totext(" ", target));

        sub = name_prefix(&rname, tctx->origin, &prefix);
        RETERR(dns_name_totext(&prefix, sub, target));

        if (multiline)
                RETERR(str_totext(" (" , target));
        RETERR(str_totext(tctx->linebreak, target));

        for (i = 0; i < 5; i++) {
                char buf[sizeof("0123456789 ; ")];
                unsigned long num;
                num = uint32_fromregion(&dregion);
                isc_region_consume(&dregion, 4);
                sprintf(buf, comm ? "%-10lu ; " : "%lu", num);
                RETERR(str_totext(buf, target));
                if (comm) {
                        RETERR(str_totext(soa_fieldnames[i], target));
                        /* Print times in week/day/hour/minute/second form */
                        if (i >= 1) {
                                RETERR(str_totext(" (", target));
                                RETERR(dns_ttl_totext(num, ISC_TRUE, target));
                                RETERR(str_totext(")", target));
                        }
                        RETERR(str_totext(tctx->linebreak, target));
                } else if (i < 4) {
                        RETERR(str_totext(tctx->linebreak, target));
                }
        }

        if (multiline)
                RETERR(str_totext(")", target));

        return (ISC_R_SUCCESS);
}

static inline isc_result_t
fromwire_soa(ARGS_FROMWIRE) {
        dns_name_t mname;
        dns_name_t rname;
        isc_region_t sregion;
        isc_region_t tregion;

        REQUIRE(type == 6);

        UNUSED(type);
        UNUSED(rdclass);

        dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);

        dns_name_init(&mname, NULL);
        dns_name_init(&rname, NULL);

        RETERR(dns_name_fromwire(&mname, source, dctx, options, target));
        RETERR(dns_name_fromwire(&rname, source, dctx, options, target));

        isc_buffer_activeregion(source, &sregion);
        isc_buffer_availableregion(target, &tregion);

        if (sregion.length < 20)
                return (ISC_R_UNEXPECTEDEND);
        if (tregion.length < 20)
                return (ISC_R_NOSPACE);

        memmove(tregion.base, sregion.base, 20);
        isc_buffer_forward(source, 20);
        isc_buffer_add(target, 20);

        return (ISC_R_SUCCESS);
}

static inline isc_result_t
towire_soa(ARGS_TOWIRE) {
        isc_region_t sregion;
        isc_region_t tregion;
        dns_name_t mname;
        dns_name_t rname;
        dns_offsets_t moffsets;
        dns_offsets_t roffsets;

        REQUIRE(rdata->type == 6);
        REQUIRE(rdata->length != 0);

        dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);

        dns_name_init(&mname, moffsets);
        dns_name_init(&rname, roffsets);

        dns_rdata_toregion(rdata, &sregion);

        dns_name_fromregion(&mname, &sregion);
        isc_region_consume(&sregion, name_length(&mname));
        RETERR(dns_name_towire(&mname, cctx, target));

        dns_name_fromregion(&rname, &sregion);
        isc_region_consume(&sregion, name_length(&rname));
        RETERR(dns_name_towire(&rname, cctx, target));

        isc_buffer_availableregion(target, &tregion);
        if (tregion.length < 20)
                return (ISC_R_NOSPACE);

        memmove(tregion.base, sregion.base, 20);
        isc_buffer_add(target, 20);
        return (ISC_R_SUCCESS);
}

static inline int
compare_soa(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 == 6);
        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);
        if (order != 0)
                return (order);

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

        return (isc_region_compare(&region1, &region2));
}

static inline isc_result_t
fromstruct_soa(ARGS_FROMSTRUCT) {
        dns_rdata_soa_t *soa = source;
        isc_region_t region;

        REQUIRE(type == 6);
        REQUIRE(source != NULL);
        REQUIRE(soa->common.rdtype == type);
        REQUIRE(soa->common.rdclass == rdclass);

        UNUSED(type);
        UNUSED(rdclass);

        dns_name_toregion(&soa->origin, &region);
        RETERR(isc_buffer_copyregion(target, &region));
        dns_name_toregion(&soa->contact, &region);
        RETERR(isc_buffer_copyregion(target, &region));
        RETERR(uint32_tobuffer(soa->serial, target));
        RETERR(uint32_tobuffer(soa->refresh, target));
        RETERR(uint32_tobuffer(soa->retry, target));
        RETERR(uint32_tobuffer(soa->expire, target));
        return (uint32_tobuffer(soa->minimum, target));
}

static inline isc_result_t
tostruct_soa(ARGS_TOSTRUCT) {
        isc_region_t region;
        dns_rdata_soa_t *soa = target;
        dns_name_t name;
        isc_result_t result;

        REQUIRE(rdata->type == 6);
        REQUIRE(target != NULL);
        REQUIRE(rdata->length != 0);

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


        dns_rdata_toregion(rdata, &region);

        dns_name_init(&name, NULL);
        dns_name_fromregion(&name, &region);
        isc_region_consume(&region, name_length(&name));
        dns_name_init(&soa->origin, NULL);
        RETERR(name_duporclone(&name, mctx, &soa->origin));

        dns_name_fromregion(&name, &region);
        isc_region_consume(&region, name_length(&name));
        dns_name_init(&soa->contact, NULL);
        result = name_duporclone(&name, mctx, &soa->contact);
        if (result != ISC_R_SUCCESS)
                goto cleanup;

        soa->serial = uint32_fromregion(&region);
        isc_region_consume(&region, 4);

        soa->refresh = uint32_fromregion(&region);
        isc_region_consume(&region, 4);

        soa->retry = uint32_fromregion(&region);
        isc_region_consume(&region, 4);

        soa->expire = uint32_fromregion(&region);
        isc_region_consume(&region, 4);

        soa->minimum = uint32_fromregion(&region);

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

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

static inline void
freestruct_soa(ARGS_FREESTRUCT) {
        dns_rdata_soa_t *soa = source;

        REQUIRE(source != NULL);
        REQUIRE(soa->common.rdtype == 6);

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

        dns_name_free(&soa->origin, soa->mctx);
        dns_name_free(&soa->contact, soa->mctx);
        soa->mctx = NULL;
}

static inline isc_result_t
additionaldata_soa(ARGS_ADDLDATA) {
        UNUSED(rdata);
        UNUSED(add);
        UNUSED(arg);

        REQUIRE(rdata->type == 6);

        return (ISC_R_SUCCESS);
}

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

        REQUIRE(rdata->type == 6);

        dns_rdata_toregion(rdata, &r);

        dns_name_init(&name, NULL);
        dns_name_fromregion(&name, &r);
        RETERR(dns_name_digest(&name, digest, arg));
        isc_region_consume(&r, name_length(&name));

        dns_name_init(&name, NULL);
        dns_name_fromregion(&name, &r);
        RETERR(dns_name_digest(&name, digest, arg));
        isc_region_consume(&r, name_length(&name));

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

static inline isc_boolean_t
checkowner_soa(ARGS_CHECKOWNER) {

        REQUIRE(type == 6);

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

        return (ISC_TRUE);
}

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

        REQUIRE(rdata->type == 6);

        UNUSED(owner);

        dns_rdata_toregion(rdata, &region);
        dns_name_init(&name, NULL);
        dns_name_fromregion(&name, &region);
        if (!dns_name_ishostname(&name, ISC_FALSE)) {
                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_soa(ARGS_COMPARE) {
        return (compare_soa(rdata1, rdata2));
}

#endif  /* RDATA_GENERIC_SOA_6_C */

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