@@ -15,15 +15,18 @@
  * file.
  */
 
 #import "OFObject.h"
 #import "OFString.h"
+#import "OFDNSResourceRecord.h"
 
 OF_ASSUME_NONNULL_BEGIN
 
 @class OFArray OF_GENERIC(ObjectType);
 @class OFDictionary OF_GENERIC(KeyType, ObjectType);
+@class OFMutableDictionary OF_GENERIC(KeyType, ObjectType);
+@class OFNumber;
 
 /*!
  * @class OFDNSResolver OFDNSResolver.h ObjFW/OFDNSResolver.h
  *
  * @brief A class for resolving DNS names.
@@ -35,10 +38,11 @@
 	OFArray OF_GENERIC(OFString *) *_nameServers;
 	OFString *_Nullable _localDomain;
 	OFArray OF_GENERIC(OFString *) *_searchDomains;
 	size_t _minNumberOfDotsInAbsoluteName;
 	bool _usesTCP;
+	OFMutableDictionary OF_GENERIC(OFNumber *, id) *_queries;
 }
 
 /*!
  * @brief A dictionary of static hosts.
  *
@@ -81,8 +85,23 @@
 
 /*!
  * @brief Initializes an already allocated OFDNSResolver.
  */
 - (instancetype)init;
+
+/*!
+ * @brief Asynchronously resolves the specified host.
+ *
+ * @param host The host to resolve
+ * @param target The target to call with the result once resolving is done
+ * @param selector The selector to call on the target. The signature must be
+ *		   `void (OFArray<OFDNSResourceRecord *> *response, id context,
+ *		   id exception)`.
+ * @param context A context object to pass along to the target
+ */
+- (void)asyncResolveHost: (OFString *)host
+		  target: (id)target
+		selector: (SEL)selector
+		 context: (nullable id)context;
 @end
 
 OF_ASSUME_NONNULL_END