C++ dns_name_isabsolute函数代码示例

void
dns_compress_add(dns_compress_t *cctx, const dns_name_t *name,
		 const dns_name_t *prefix, isc_uint16_t offset)
{
	dns_name_t tname;
	unsigned int start;
	unsigned int n;
	unsigned int count;
	unsigned int hash;
	dns_compressnode_t *node;
	unsigned int length;
	unsigned int tlength;
	isc_uint16_t toffset;

	REQUIRE(VALID_CCTX(cctx));
	REQUIRE(dns_name_isabsolute(name));

	dns_name_init(&tname, NULL);

	n = dns_name_countlabels(name);
	count = dns_name_countlabels(prefix);
	if (dns_name_isabsolute(prefix))
		count--;
	start = 0;
	length = name_length(name);
	while (count > 0) {
		if (offset >= 0x4000)
			break;
		dns_name_getlabelsequence(name, start, n, &tname);
		hash = dns_name_hash(&tname, ISC_FALSE) %
		       DNS_COMPRESS_TABLESIZE;
		tlength = name_length(&tname);
		toffset = (isc_uint16_t)(offset + (length - tlength));
		/*
		 * Create a new node and add it.
		 */
		if (cctx->count < DNS_COMPRESS_INITIALNODES)
			node = &cctx->initialnodes[cctx->count];
		else {
			node = isc_mem_get(cctx->mctx,
					   sizeof(dns_compressnode_t));
			if (node == NULL)
				return;
		}
		node->count = cctx->count++;
		node->offset = toffset;
		dns_name_toregion(&tname, &node->r);
		node->labels = (isc_uint8_t)dns_name_countlabels(&tname);
		node->next = cctx->table[hash];
		cctx->table[hash] = node;
		start++;
		n--;
		count--;
	}
}

isc_result_t
dst_key_getfilename(dns_name_t *name, dns_keytag_t id,
		    unsigned int alg, int type, const char *directory,
		    isc_mem_t *mctx, isc_buffer_t *buf)
{
	isc_result_t result;

	REQUIRE(dst_initialized == ISC_TRUE);
	REQUIRE(dns_name_isabsolute(name));
	REQUIRE((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) != 0);
	REQUIRE(mctx != NULL);
	REQUIRE(buf != NULL);

	CHECKALG(alg);

	result = buildfilename(name, id, alg, type, directory, buf);
	if (result == ISC_R_SUCCESS) {
		if (isc_buffer_availablelength(buf) > 0)
			isc_buffer_putuint8(buf, 0);
		else
			result = ISC_R_NOSPACE;
	}

	return (result);
}

isc_result_t
dst_key_buildinternal(dns_name_t *name, unsigned int alg,
		      unsigned int bits, unsigned int flags,
		      unsigned int protocol, dns_rdataclass_t rdclass,
		      void *data, isc_mem_t *mctx, dst_key_t **keyp)
{
	dst_key_t *key;
	isc_result_t result;

	REQUIRE(dst_initialized == ISC_TRUE);
	REQUIRE(dns_name_isabsolute(name));
	REQUIRE(mctx != NULL);
	REQUIRE(keyp != NULL && *keyp == NULL);
	REQUIRE(data != NULL);

	CHECKALG(alg);

	key = get_key_struct(name, alg, flags, protocol, bits, rdclass,
			     0, mctx);
	if (key == NULL)
		return (ISC_R_NOMEMORY);

	key->keydata.generic = data;

	result = computeid(key);
	if (result != ISC_R_SUCCESS) {
		dst_key_free(&key);
		return (result);
	}

	*keyp = key;
	return (ISC_R_SUCCESS);
}

isc_result_t
dns_keytable_finddeepestmatch(dns_keytable_t *keytable, dns_name_t *name,
			      dns_name_t *foundname)
{
	isc_result_t result;
	void *data;

	/*
	 * Search for the deepest match in 'keytable'.
	 */

	REQUIRE(VALID_KEYTABLE(keytable));
	REQUIRE(dns_name_isabsolute(name));
	REQUIRE(foundname != NULL);

	RWLOCK(&keytable->rwlock, isc_rwlocktype_read);

	data = NULL;
	result = dns_rbt_findname(keytable->table, name, 0, foundname, &data);

	if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH)
		result = ISC_R_SUCCESS;

	RWUNLOCK(&keytable->rwlock, isc_rwlocktype_read);

	return (result);
}

isc_result_t
dns_db_create(isc_mem_t *mctx, const char *db_type, dns_name_t *origin,
	      dns_dbtype_t type, dns_rdataclass_t rdclass,
	      unsigned int argc, char *argv[], dns_db_t **dbp)
{
	dns_dbimplementation_t *impinfo;

	RUNTIME_CHECK(isc_once_do(&once, initialize) == ISC_R_SUCCESS);

	/*
	 * Create a new database using implementation 'db_type'.
	 */

	REQUIRE(dbp != NULL && *dbp == NULL);
	REQUIRE(dns_name_isabsolute(origin));

	RWLOCK(&implock, isc_rwlocktype_read);
	impinfo = impfind(db_type);
	if (impinfo != NULL) {
		isc_result_t result;
		result = ((impinfo->create)(mctx, origin, type,
					    rdclass, argc, argv,
					    impinfo->driverarg, dbp));
		RWUNLOCK(&implock, isc_rwlocktype_read);
		return (result);
	}

	RWUNLOCK(&implock, isc_rwlocktype_read);

	isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
		      DNS_LOGMODULE_DB, ISC_LOG_ERROR,
		      "unsupported database type '%s'", db_type);

	return (ISC_R_NOTFOUND);
}

isc_result_t
dns_keytable_issecuredomain(dns_keytable_t *keytable, dns_name_t *name,
			    isc_boolean_t *wantdnssecp)
{
	isc_result_t result;
	void *data;

	/*
	 * Is 'name' at or beneath a trusted key?
	 */

	REQUIRE(VALID_KEYTABLE(keytable));
	REQUIRE(dns_name_isabsolute(name));
	REQUIRE(wantdnssecp != NULL);

	RWLOCK(&keytable->rwlock, isc_rwlocktype_read);

	data = NULL;
	result = dns_rbt_findname(keytable->table, name, 0, NULL, &data);

	if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH) {
		INSIST(data != NULL);
		*wantdnssecp = ISC_TRUE;
		result = ISC_R_SUCCESS;
	} else if (result == ISC_R_NOTFOUND) {
		*wantdnssecp = ISC_FALSE;
		result = ISC_R_SUCCESS;
	}

	RWUNLOCK(&keytable->rwlock, isc_rwlocktype_read);

	return (result);
}

static inline void
name_to_gbuffer(dns_name_t *name, isc_buffer_t *buffer,
		gss_buffer_desc *gbuffer)
{
	dns_name_t tname, *namep;
	isc_region_t r;
	isc_result_t result;

	if (!dns_name_isabsolute(name))
		namep = name;
	else
	{
		unsigned int labels;
		dns_name_init(&tname, NULL);
		labels = dns_name_countlabels(name);
		dns_name_getlabelsequence(name, 0, labels - 1, &tname);
		namep = &tname;
	}

	result = dns_name_toprincipal(namep, buffer);
	RUNTIME_CHECK(result == ISC_R_SUCCESS);
	isc_buffer_putuint8(buffer, 0);
	isc_buffer_usedregion(buffer, &r);
	REGION_TO_GBUFFER(r, *gbuffer);
}

isc_result_t
dns_keytable_findkeynode(dns_keytable_t *keytable, dns_name_t *name,
			 dns_secalg_t algorithm, dns_keytag_t tag,
			 dns_keynode_t **keynodep)
{
	isc_result_t result;
	dns_keynode_t *knode;
	void *data;

	/*
	 * Search for a key named 'name', matching 'algorithm' and 'tag' in
	 * 'keytable'.
	 */

	REQUIRE(VALID_KEYTABLE(keytable));
	REQUIRE(dns_name_isabsolute(name));
	REQUIRE(keynodep != NULL && *keynodep == NULL);

	RWLOCK(&keytable->rwlock, isc_rwlocktype_read);

	/*
	 * Note we don't want the DNS_R_PARTIALMATCH from dns_rbt_findname()
	 * as that indicates that 'name' was not found.
	 *
	 * DNS_R_PARTIALMATCH indicates that the name was found but we
	 * didn't get a match on algorithm and key id arguments.
	 */
	knode = NULL;
	data = NULL;
	result = dns_rbt_findname(keytable->table, name, 0, NULL, &data);

	if (result == ISC_R_SUCCESS) {
		INSIST(data != NULL);
		for (knode = data; knode != NULL; knode = knode->next) {
			if (knode->key == NULL) {
				knode = NULL;
				break;
			}
			if (algorithm == dst_key_alg(knode->key)
			    && tag == dst_key_id(knode->key))
				break;
		}
		if (knode != NULL) {
			LOCK(&keytable->lock);
			keytable->active_nodes++;
			UNLOCK(&keytable->lock);
			dns_keynode_attach(knode, keynodep);
		} else
			result = DNS_R_PARTIALMATCH;
	} else if (result == DNS_R_PARTIALMATCH)
		result = ISC_R_NOTFOUND;

	RWUNLOCK(&keytable->rwlock, isc_rwlocktype_read);

	return (result);
}

/*
 * Find the longest match of name in the table.
 * If match is found return ISC_TRUE. prefix, suffix and offset are updated.
 * If no match is found return ISC_FALSE.
 */
isc_boolean_t
dns_compress_findglobal(dns_compress_t *cctx, const dns_name_t *name,
			dns_name_t *prefix, isc_uint16_t *offset)
{
	dns_name_t tname, nname;
	dns_compressnode_t *node = NULL;
	unsigned int labels, hash, n;

	REQUIRE(VALID_CCTX(cctx));
	REQUIRE(dns_name_isabsolute(name) == ISC_TRUE);
	REQUIRE(offset != NULL);

	if (cctx->count == 0)
		return (ISC_FALSE);

	labels = dns_name_countlabels(name);
	INSIST(labels > 0);

	dns_name_init(&tname, NULL);
	dns_name_init(&nname, NULL);

	for (n = 0; n < labels - 1; n++) {
		dns_name_getlabelsequence(name, n, labels - n, &tname);
		hash = dns_name_hash(&tname, ISC_FALSE) %
		       DNS_COMPRESS_TABLESIZE;
		for (node = cctx->table[hash]; node != NULL; node = node->next)
		{
			NODENAME(node, &nname);
			if ((cctx->allowed & DNS_COMPRESS_CASESENSITIVE) != 0) {
				if (dns_name_caseequal(&nname, &tname))
					break;
			} else {
				if (dns_name_equal(&nname, &tname))
					break;
			}
		}
		if (node != NULL)
			break;
	}

	/*
	 * If node == NULL, we found no match at all.
	 */
	if (node == NULL)
		return (ISC_FALSE);

	if (n == 0)
		dns_name_reset(prefix);
	else
		dns_name_getlabelsequence(name, 0, n, prefix);

	*offset = node->offset;
	return (ISC_TRUE);
}

isc_result_t
dst_key_generate2(dns_name_t *name, unsigned int alg,
		  unsigned int bits, unsigned int param,
		  unsigned int flags, unsigned int protocol,
		  dns_rdataclass_t rdclass,
		  isc_mem_t *mctx, dst_key_t **keyp,
		  void (*callback)(int))
{
	dst_key_t *key;
	isc_result_t ret;

	REQUIRE(dst_initialized == ISC_TRUE);
	REQUIRE(dns_name_isabsolute(name));
	REQUIRE(mctx != NULL);
	REQUIRE(keyp != NULL && *keyp == NULL);

	CHECKALG(alg);

	key = get_key_struct(name, alg, flags, protocol, bits,
			     rdclass, 0, mctx);
	if (key == NULL)
		return (ISC_R_NOMEMORY);

	if (bits == 0) { /*%< NULL KEY */
		key->key_flags |= DNS_KEYTYPE_NOKEY;
		*keyp = key;
		return (ISC_R_SUCCESS);
	}

	if (key->func->generate == NULL) {
		dst_key_free(&key);
		return (DST_R_UNSUPPORTEDALG);
	}

	ret = key->func->generate(key, param, callback);
	if (ret != ISC_R_SUCCESS) {
		dst_key_free(&key);
		return (ret);
	}

	ret = computeid(key);
	if (ret != ISC_R_SUCCESS) {
		dst_key_free(&key);
		return (ret);
	}

	*keyp = key;
	return (ISC_R_SUCCESS);
}

isc_result_t
dst_key_fromfile(dns_name_t *name, dns_keytag_t id,
		 unsigned int alg, int type, const char *directory,
		 isc_mem_t *mctx, dst_key_t **keyp)
{
	isc_result_t result;
	char filename[ISC_DIR_NAMEMAX];
	isc_buffer_t buf;
	dst_key_t *key;

	REQUIRE(dst_initialized == ISC_TRUE);
	REQUIRE(dns_name_isabsolute(name));
	REQUIRE((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) != 0);
	REQUIRE(mctx != NULL);
	REQUIRE(keyp != NULL && *keyp == NULL);

	CHECKALG(alg);

	key = NULL;

	isc_buffer_init(&buf, filename, ISC_DIR_NAMEMAX);
	result = dst_key_getfilename(name, id, alg, type, NULL, mctx, &buf);
	if (result != ISC_R_SUCCESS)
		goto out;

	result = dst_key_fromnamedfile(filename, directory, type, mctx, &key);
	if (result != ISC_R_SUCCESS)
		goto out;

	result = computeid(key);
	if (result != ISC_R_SUCCESS)
		goto out;

	if (!dns_name_equal(name, key->key_name) || id != key->key_id ||
	    alg != key->key_alg) {
		result = DST_R_INVALIDPRIVATEKEY;
		goto out;
	}

	*keyp = key;
	result = ISC_R_SUCCESS;

 out:
	if ((key != NULL) && (result != ISC_R_SUCCESS))
		dst_key_free(&key);

	return (result);
}

isc_result_t
dst_key_fromfile(dns_name_t *name, dns_keytag_t id,
		 unsigned int alg, int type, const char *directory,
		 isc_mem_t *mctx, dst_key_t **keyp)
{
	char filename[ISC_DIR_NAMEMAX];
	isc_buffer_t b;
	dst_key_t *key;
	isc_result_t result;

	REQUIRE(dst_initialized == ISC_TRUE);
	REQUIRE(dns_name_isabsolute(name));
	REQUIRE((type & (DST_TYPE_PRIVATE | DST_TYPE_PUBLIC)) != 0);
	REQUIRE(mctx != NULL);
	REQUIRE(keyp != NULL && *keyp == NULL);

	CHECKALG(alg);

	isc_buffer_init(&b, filename, sizeof(filename));
	result = buildfilename(name, id, alg, type, directory, &b);
	if (result != ISC_R_SUCCESS)
		return (result);

	key = NULL;
	result = dst_key_fromnamedfile(filename, type, mctx, &key);
	if (result != ISC_R_SUCCESS)
		return (result);

	result = computeid(key);
	if (result != ISC_R_SUCCESS) {
		dst_key_free(&key);
		return (result);
	}

	if (!dns_name_equal(name, key->key_name) ||
	    id != key->key_id ||
	    alg != key->key_alg)
	{
		dst_key_free(&key);
		return (DST_R_INVALIDPRIVATEKEY);
	}
	key->key_id = id;

	*keyp = key;
	return (ISC_R_SUCCESS);
}

void
ns_lwsearchctx_init(ns_lwsearchctx_t *sctx, ns_lwsearchlist_t *list,
		    dns_name_t *name, unsigned int ndots)
{
	INSIST(sctx != NULL);
	sctx->relname = name;
	sctx->searchname = NULL;
	sctx->doneexact = ISC_FALSE;
	sctx->exactfirst = ISC_FALSE;
	sctx->ndots = ndots;
	if (dns_name_isabsolute(name) || list == NULL) {
		sctx->list = NULL;
		return;
	}
	sctx->list = list;
	sctx->searchname = ISC_LIST_HEAD(sctx->list->names);
	if (dns_name_countlabels(name) > ndots)
		sctx->exactfirst = ISC_TRUE;
}

isc_result_t
dst_key_fromlabel(dns_name_t *name, int alg, unsigned int flags,
		  unsigned int protocol, dns_rdataclass_t rdclass,
		  const char *engine, const char *label, const char *pin,
		  isc_mem_t *mctx, dst_key_t **keyp)
{
	dst_key_t *key;
	isc_result_t result;

	REQUIRE(dst_initialized == ISC_TRUE);
	REQUIRE(dns_name_isabsolute(name));
	REQUIRE(mctx != NULL);
	REQUIRE(keyp != NULL && *keyp == NULL);
	REQUIRE(label != NULL);

	CHECKALG(alg);

	key = get_key_struct(name, alg, flags, protocol, 0, rdclass, 0, mctx);
	if (key == NULL)
		return (ISC_R_NOMEMORY);

	if (key->func->fromlabel == NULL) {
		dst_key_free(&key);
		return (DST_R_UNSUPPORTEDALG);
	}

	result = key->func->fromlabel(key, engine, label, pin);
	if (result != ISC_R_SUCCESS) {
		dst_key_free(&key);
		return (result);
	}

	result = computeid(key);
	if (result != ISC_R_SUCCESS) {
		dst_key_free(&key);
		return (result);
	}

	*keyp = key;
	return (ISC_R_SUCCESS);
}

isc_result_t
ns_lwsearchctx_current(ns_lwsearchctx_t *sctx, dns_name_t *absname) {
	dns_name_t *tname;
	isc_boolean_t useexact = ISC_FALSE;

	REQUIRE(sctx != NULL);

	if (sctx->list == NULL ||
	    sctx->searchname == NULL ||
	    (sctx->exactfirst && !sctx->doneexact))
		useexact = ISC_TRUE;

	if (useexact) {
		if (dns_name_isabsolute(sctx->relname))
			tname = NULL;
		else
			tname = dns_rootname;
	} else
		tname = sctx->searchname;

	return (dns_name_concatenate(sctx->relname, tname, absname, NULL));
}