jens@27: //
jens@27: //  MYDNSService.h
jens@27: //  MYNetwork
jens@27: //
jens@27: //  Created by Jens Alfke on 4/23/09.
jens@27: //  Copyright 2009 Jens Alfke. All rights reserved.
jens@27: //
jens@27: 
jens@27: #import <Foundation/Foundation.h>
jens@27: #import <CoreFoundation/CFSocket.h>
jens@31: @class MYDNSConnection;
jens@27: 
jens@27: 
jens@27: /** Abstract superclass for services based on DNSServiceRefs, such as MYPortMapper. */
jens@27: @interface MYDNSService : NSObject
jens@27: {
jens@27:     @private
jens@31:     BOOL _usePrivateConnection;
jens@31:     MYDNSConnection *_connection;
jens@27:     struct _DNSServiceRef_t *_serviceRef;
jens@27:     CFSocketRef _socket;
jens@27:     CFRunLoopSourceRef _socketSource;
jens@27:     SInt32 _error;
jens@31:     BOOL _continuous, _gotResponse;
jens@27: }
jens@27: 
jens@28: /** If NO (the default), the service will stop after it gets a result.
jens@28:     If YES, it will continue to run until stopped. */
jens@28: @property BOOL continuous;
jens@28: 
jens@27: /** Starts the service.
jens@27:     Returns immediately; you can find out when the service actually starts (or fails to)
jens@27:     by observing the isOpen and error properties.
jens@27:     It's very unlikely that this call itself will fail (return NO). If it does, it
jens@27:     probably means that the mDNSResponder process isn't working. */
jens@28: - (BOOL) start;
jens@27: 
jens@28: /** Stops the service. */
jens@28: - (void) stop;
jens@27: 
jens@27: 
jens@27: /** The error status, a DNSServiceErrorType enum; nonzero if something went wrong. 
jens@27:     This property is KV observable. */
jens@28: @property int32_t error;
jens@27: 
jens@31: 
jens@31: /** Utility to construct a service's full name. */
jens@31: + (NSString*) fullNameOfService: (NSString*)serviceName
jens@31:                          ofType: (NSString*)type
jens@31:                        inDomain: (NSString*)domain;
jens@31: 
jens@31: 
jens@32: /** @name Protected
jens@32:  *  Methods for use only by subclasses
jens@32:  */
jens@32: //@{
jens@31: 
jens@32: /** Normally, all DNSService objects use a shared IPC connection to the mDNSResponder daemon.
jens@32:     If an instance wants to use its own connection instead, it can set this property to YES before
jens@32:     it starts. If it does so, it must NOT set the kDNSServiceFlagsShareConnection flag when creating
jens@32:     its underlying DNSService.
jens@32:     This functionality is only provided because MYBonjourRegistration needs it -- there's a bug
jens@32:     that prevents DNSServiceUpdateRecord from working with a shared connection. */
jens@31: @property BOOL usePrivateConnection;
jens@31: 
jens@27: /** Subclass must implement this abstract method to create a new DNSServiceRef.
jens@27:     This method is called by -open.
jens@31:     The implementation MUST pass the given sdRefPtr directly to the DNSService function
jens@31:     that creates the new ref, without setting it to NULL first.
jens@32:     It MUST also set the kDNSServiceFlagsShareConnection flag, unless it's already set the
jens@32:     usePrivateConnection property. */
jens@31: - (int32_t/*DNSServiceErrorType*/) createServiceRef: (struct _DNSServiceRef_t**)sdRefPtr;
jens@31: 
jens@31: /** Subclass's callback must call this method after doing its own work.
jens@31:     This method will update the error state, and will stop the service if it's not set to be
jens@31:     continuous. */
jens@31: - (void) gotResponse: (int32_t/*DNSServiceErrorType*/)errorCode;
jens@27: 
jens@32: /** The underlying DNSServiceRef. This will be NULL except while the service is running. */
jens@28: @property (readonly) struct _DNSServiceRef_t* serviceRef;
jens@28: 
jens@28: /** Same as -stop, but does not clear the error property.
jens@28:     (The stop method actually calls this first.) */
jens@28: - (void) cancel;
jens@28: 
jens@28: /** Block until a message is received from the daemon.
jens@28:     This will cause the service's callback (defined by the subclass) to be invoked.
jens@28:     @return  YES if a message is received, NO on error (or if the service isn't started) */
jens@28: - (BOOL) waitForReply;
jens@27: 
jens@32: //@}
jens@31: 
jens@27: @end
jens@31: 
jens@31: 
jens@31: 
jens@31: 
jens@31: @interface MYDNSConnection : NSObject
jens@31: {
jens@31:     struct _DNSServiceRef_t* _connectionRef;
jens@31:     CFSocketRef _socket;
jens@31:     CFRunLoopSourceRef _runLoopSource;
jens@31: }
jens@31: 
jens@31: + (MYDNSConnection*) sharedConnection;
jens@31: - (id) initWithServiceRef: (struct _DNSServiceRef_t *)serviceRef;
jens@31: @property (readonly) struct _DNSServiceRef_t* connectionRef;
jens@31: - (BOOL) processResult;
jens@31: - (void) close;
jens@31: 
jens@31: @end