C++ dns_name_init函数代码示例

static inline isc_result_t
fromtext_dname(ARGS_FROMTEXT) {
	isc_token_t token;
	dns_name_t name;
	isc_buffer_t buffer;

	REQUIRE(type == 39);

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

	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));
	return (ISC_R_SUCCESS);
}

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

	REQUIRE(rdata->type == 1);
	REQUIRE(rdata->rdclass == dns_rdataclass_ch);

	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);
	}

	return (ISC_TRUE);
}

isc_result_t
ns_lwsearchlist_append(ns_lwsearchlist_t *list, dns_name_t *name) {
	dns_name_t *newname;
	isc_result_t result;

	REQUIRE(VALID_LWSEARCHLIST(list));
	REQUIRE(name != NULL);

	newname = isc_mem_get(list->mctx, sizeof(dns_name_t));
	if (newname == NULL)
		return (ISC_R_NOMEMORY);
	dns_name_init(newname, NULL);
	result = dns_name_dup(name, list->mctx, newname);
	if (result != ISC_R_SUCCESS) {
		isc_mem_put(list->mctx, newname, sizeof(dns_name_t));
		return (result);
	}
	ISC_LINK_INIT(newname, link);
	ISC_LIST_APPEND(list->names, newname, link);
	return (ISC_R_SUCCESS);
}

static inline isc_result_t
fromwire_mx(ARGS_FROMWIRE) {
	dns_name_t name;
	isc_region_t sregion;

	REQUIRE(type == 15);

	UNUSED(type);
	UNUSED(rdclass);

	dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);

	dns_name_init(&name, NULL);

	isc_buffer_activeregion(source, &sregion);
	if (sregion.length < 2)
		return (ISC_R_UNEXPECTEDEND);
	RETERR(mem_tobuffer(target, sregion.base, 2));
	isc_buffer_forward(source, 2);
	return (dns_name_fromwire(&name, source, dctx, options, target));
}

static inline isc_result_t
fromwire_cdnskey(ARGS_FROMWIRE) {
	unsigned char algorithm;
	isc_region_t sr;

	REQUIRE(type == dns_rdatatype_cdnskey);

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

	isc_buffer_activeregion(source, &sr);
	if (sr.length < 4)
		return (ISC_R_UNEXPECTEDEND);

	algorithm = sr.base[3];
	RETERR(mem_tobuffer(target, sr.base, 4));
	isc_region_consume(&sr, 4);
	isc_buffer_forward(source, 4);

	if (algorithm == DNS_KEYALG_PRIVATEDNS) {
		dns_name_t name;
		dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
		dns_name_init(&name, NULL);
		RETERR(dns_name_fromwire(&name, source, dctx, options, target));
	}

	/*
	 * RSAMD5 computes key ID differently from other
	 * algorithms: we need to ensure there's enough data
	 * present for the computation
	 */
	if (algorithm == DST_ALG_RSAMD5 && sr.length < 3)
		return (ISC_R_UNEXPECTEDEND);

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

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

	REQUIRE(type == 18);

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

	/*
	 * Subtype.
	 */
	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));

	/*
	 * Hostname.
	 */
	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_ishostname(&name, ISC_FALSE);
	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
additionaldata_rt(ARGS_ADDLDATA) {
	dns_name_t name;
	dns_offsets_t offsets;
	isc_region_t region;
	isc_result_t result;

	REQUIRE(rdata->type == 21);

	dns_name_init(&name, offsets);
	dns_rdata_toregion(rdata, &region);
	isc_region_consume(&region, 2);
	dns_name_fromregion(&name, &region);

	result = (add)(arg, &name, dns_rdatatype_x25);
	if (result != ISC_R_SUCCESS)
		return (result);
	result = (add)(arg, &name, dns_rdatatype_isdn);
	if (result != ISC_R_SUCCESS)
		return (result);
	return ((add)(arg, &name, dns_rdatatype_a));
}

/*%
 * Allocates a key structure and fills in some of the fields.
 */
static dst_key_t *
get_key_struct(dns_name_t *name, unsigned int alg,
	       unsigned int flags, unsigned int protocol,
	       unsigned int bits, dns_rdataclass_t rdclass,
	       isc_mem_t *mctx)
{
	dst_key_t *key;
	isc_result_t result;

	key = (dst_key_t *) isc_mem_get(mctx, sizeof(dst_key_t));
	if (key == NULL)
		return (NULL);

	memset(key, 0, sizeof(dst_key_t));
	key->magic = KEY_MAGIC;

	key->key_name = isc_mem_get(mctx, sizeof(dns_name_t));
	if (key->key_name == NULL) {
		isc_mem_put(mctx, key, sizeof(dst_key_t));
		return (NULL);
	}
	dns_name_init(key->key_name, NULL);
	result = dns_name_dup(name, mctx, key->key_name);
	if (result != ISC_R_SUCCESS) {
		isc_mem_put(mctx, key->key_name, sizeof(dns_name_t));
		isc_mem_put(mctx, key, sizeof(dst_key_t));
		return (NULL);
	}
	key->key_alg = alg;
	key->key_flags = flags;
	key->key_proto = protocol;
	key->mctx = mctx;
	key->opaque = NULL;
	key->key_size = bits;
	key->key_class = rdclass;
	key->func = dst_t_func[alg];
	return (key);
}

int
main(int argc, char *argv[]) {
	isc_result_t result;
	dns_name_t origin;
	isc_buffer_t source;
	isc_buffer_t target;
	unsigned char name_buf[255];
	dns_rdatacallbacks_t callbacks;

	UNUSED(argc);

	RUNTIME_CHECK(isc_mem_create(0, 0, &mctx) == ISC_R_SUCCESS);

	if (argv[1]) {
		isc_buffer_init(&source, argv[1], strlen(argv[1]));
		isc_buffer_add(&source, strlen(argv[1]));
		isc_buffer_setactive(&source, strlen(argv[1]));
		isc_buffer_init(&target, name_buf, 255);
		dns_name_init(&origin, NULL);
		result = dns_name_fromtext(&origin, &source, dns_rootname,
					   0, &target);
		if (result != ISC_R_SUCCESS) {
			fprintf(stdout, "dns_name_fromtext: %s\n",
				dns_result_totext(result));
			exit(1);
		}

		dns_rdatacallbacks_init_stdio(&callbacks);
		callbacks.add = print_dataset;

		result = dns_master_loadfile(argv[1], &origin, &origin,
					     dns_rdataclass_in, 0,
					     &callbacks, mctx);
		fprintf(stdout, "dns_master_loadfile: %s\n",
			dns_result_totext(result));
	}
	return (0);
}

static inline isc_result_t fromtext_ch_a (ARGS_FROMTEXT)
{
    isc_token_t token;

    dns_name_t name;

    isc_buffer_t buffer;

    REQUIRE (type == 1);
    REQUIRE (rdclass == dns_rdataclass_ch);    /* 3 */

    UNUSED (type);
    UNUSED (callbacks);

    RETERR (isc_lex_getmastertoken (lexer, &token, isc_tokentype_string, ISC_FALSE));

    /* get domain name */
    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));
    if ((options & DNS_RDATA_CHECKNAMES) != 0 && (options & DNS_RDATA_CHECKREVERSE) != 0)
    {
        isc_boolean_t ok;

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

    /* 16-bit octal address */
    RETERR (isc_lex_getoctaltoken (lexer, &token, ISC_FALSE));
    if (token.value.as_ulong > 0xffffU)
        RETTOK (ISC_R_RANGE);
    return (uint16_tobuffer (token.value.as_ulong, target));
}

static inline isc_result_t
fromwire_hip(ARGS_FROMWIRE) {
	isc_region_t region, rr;
	dns_name_t name;
	isc_uint8_t hit_len;
	isc_uint16_t key_len;

	REQUIRE(type == dns_rdatatype_hip);

	UNUSED(type);
	UNUSED(rdclass);

	isc_buffer_activeregion(source, &region);
	if (region.length < 4U)
		RETERR(DNS_R_FORMERR);

	rr = region;
	hit_len = uint8_fromregion(&region);
	if (hit_len == 0)
		RETERR(DNS_R_FORMERR);
	isc_region_consume(&region, 2);  	/* hit length + algorithm */
	key_len = uint16_fromregion(&region);
	if (key_len == 0)
		RETERR(DNS_R_FORMERR);
	isc_region_consume(&region, 2);
	if (region.length < (unsigned) (hit_len + key_len))
		RETERR(DNS_R_FORMERR);

	RETERR(mem_tobuffer(target, rr.base, 4 + hit_len + key_len));
	isc_buffer_forward(source, 4 + hit_len + key_len);

	dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
	while (isc_buffer_activelength(source) > 0) {
		dns_name_init(&name, NULL);
		RETERR(dns_name_fromwire(&name, source, dctx, options, target));
	}
	return (ISC_R_SUCCESS);
}

isc_result_t ATTR_NONNULLS
dns_ns_buildrdata(dns_name_t *origin, dns_name_t *ns_name,
		   dns_rdataclass_t rdclass,
		   unsigned char *buffer,
		   dns_rdata_t *rdata) {
	dns_rdata_ns_t ns;
	isc_buffer_t rdatabuf;

	REQUIRE(origin != NULL);
	REQUIRE(ns_name != NULL);

	memset(buffer, 0, DNS_SOA_BUFFERSIZE);
	isc_buffer_init(&rdatabuf, buffer, DNS_SOA_BUFFERSIZE);

	ns.common.rdtype = dns_rdatatype_ns;
	ns.common.rdclass = rdclass;
	ns.mctx = NULL;
	dns_name_init(&ns.name, NULL);
	dns_name_clone(ns_name, &ns.name);

	return (dns_rdata_fromstruct(rdata, rdclass, dns_rdatatype_ns,
				      &ns, &rdatabuf));
}

/*
 * Common routine to make query data
 */
static isc_result_t
make_querymessage(dns_message_t *message, dns_name_t *qname0,
		  dns_rdatatype_t rdtype)
{
	dns_name_t *qname = NULL;
	dns_rdataset_t *qrdataset = NULL;
	isc_result_t result;

	message->opcode = dns_opcode_query;
	message->rdclass = dns_rdataclass_in;

	result = dns_message_gettempname(message, &qname);
	if (result != ISC_R_SUCCESS)
		goto cleanup;

	result = dns_message_gettemprdataset(message, &qrdataset);
	if (result != ISC_R_SUCCESS)
		goto cleanup;

	dns_name_init(qname, NULL);
	dns_name_clone(qname0, qname);
	dns_rdataset_init(qrdataset);
	dns_rdataset_makequestion(qrdataset, message->rdclass, rdtype);
	ISC_LIST_APPEND(qname->list, qrdataset, link);
	dns_message_addname(message, qname, DNS_SECTION_QUESTION);

	return (ISC_R_SUCCESS);

 cleanup:
	if (qname != NULL)
		dns_message_puttempname(message, &qname);
	if (qrdataset != NULL)
		dns_message_puttemprdataset(message, &qrdataset);
	if (message != NULL)
		dns_message_destroy(&message);
	return (result);
}

static isc_result_t
add_ns(dns_db_t *db, dns_dbversion_t *version, const dns_name_t *name,
       const dns_name_t *nsname)
{
	dns_dbnode_t *node = NULL;
	dns_rdata_ns_t ns;
	dns_rdata_t rdata = DNS_RDATA_INIT;
	dns_rdatalist_t rdatalist;
	dns_rdataset_t rdataset;
	isc_result_t result;
	isc_buffer_t b;
	unsigned char buf[DNS_NAME_MAXWIRE];

	isc_buffer_init(&b, buf, sizeof(buf));

	dns_rdataset_init(&rdataset);
	dns_rdatalist_init(&rdatalist);
	ns.common.rdtype = dns_rdatatype_ns;
	ns.common.rdclass = dns_db_class(db);
	ns.mctx = NULL;
	dns_name_init(&ns.name, NULL);
	dns_name_clone(nsname, &ns.name);
	CHECK(dns_rdata_fromstruct(&rdata, dns_db_class(db), dns_rdatatype_ns,
				   &ns, &b));
	rdatalist.type = rdata.type;
	rdatalist.covers = 0;
	rdatalist.rdclass = rdata.rdclass;
	rdatalist.ttl = 86400;
	ISC_LIST_APPEND(rdatalist.rdata, &rdata, link);
	CHECK(dns_rdatalist_tordataset(&rdatalist, &rdataset));
	CHECK(dns_db_findnode(db, name, ISC_TRUE, &node));
	CHECK(dns_db_addrdataset(db, node, version, 0, &rdataset, 0, NULL));
 cleanup:
	if (node != NULL)
		dns_db_detachnode(db, &node);
	return (result);
}

static inline isc_result_t
towire_sig(ARGS_TOWIRE) {
	isc_region_t sr;
	dns_name_t name;
	dns_offsets_t offsets;

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

	dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
	dns_rdata_toregion(rdata, &sr);
	/*
	 * type covered: 2
	 * algorithm: 1
	 * labels: 1
	 * original ttl: 4
	 * signature expiration: 4
	 * time signed: 4
	 * key footprint: 2
	 */
	RETERR(mem_tobuffer(target, sr.base, 18));
	isc_region_consume(&sr, 18);

	/*
	 * Signer.
	 */
	dns_name_init(&name, offsets);
	dns_name_fromregion(&name, &sr);
	isc_region_consume(&sr, name_length(&name));
	RETERR(dns_name_towire(&name, cctx, target));

	/*
	 * Signature.
	 */
	return (mem_tobuffer(target, sr.base, sr.length));
}