jens@0: //
jens@0: //  TCPStream.h
jens@0: //  MYNetwork
jens@0: //
jens@0: //  Created by Jens Alfke on 5/10/08.
jens@0: //  Copyright 2008 Jens Alfke. All rights reserved.
jens@0: //
jens@0: 
jens@0: #import <Foundation/Foundation.h>
jens@0: @class TCPConnection, TCPWriter;
jens@0: 
jens@0: 
jens@2: /** Abstract superclass for data streams, used by TCPConnection. */
jens@0: @interface TCPStream : NSObject 
jens@0: {
jens@0:     TCPConnection *_conn;
jens@0:     NSStream *_stream;
jens@0:     BOOL _shouldClose;
jens@0: }
jens@0: 
jens@0: - (id) initWithConnection: (TCPConnection*)conn stream: (NSStream*)stream;
jens@0: 
jens@0: /** The connection's security level as reported by the underlying CFStream. */
jens@0: @property (readonly) NSString *securityLevel;
jens@0: 
jens@0: /** The SSL property dictionary for the CFStream. */
jens@0: @property (copy) NSDictionary* SSLProperties;
jens@0: 
jens@0: /** The SSL certificate(s) of the peer, if any. */
jens@0: @property (readonly) NSArray *peerSSLCerts;
jens@0: 
jens@0: /** Opens the stream. */
jens@0: - (void) open;
jens@0: 
jens@0: /** Disconnects abruptly. */
jens@0: - (void) disconnect;
jens@0: 
jens@0: /** Closes the stream politely, waiting until there's no data pending. */
jens@0: - (BOOL) close;
jens@0: 
jens@0: /** Is the stream open? */
jens@0: @property (readonly) BOOL isOpen;
jens@0: 
jens@0: /** Does the stream have pending data to read or write, that prevents it from closing? */
jens@0: @property (readonly) BOOL isBusy;
jens@0: 
jens@0: /** Generic accessor for CFStream/NSStream properties. */
jens@0: - (id) propertyForKey: (CFStringRef)cfStreamProperty;
jens@0: 
jens@0: /** Generic accessor for CFStream/NSStream properties. */
jens@0: - (void) setProperty: (id)value forKey: (CFStringRef)cfStreamProperty;
jens@0: 
jens@0: @end
jens@0: 
jens@0: 
jens@0: /** Input stream for a TCPConnection. */
jens@0: @interface TCPReader : TCPStream
jens@2: 
jens@0: /** The connection's TCPWriter. */
jens@0: @property (readonly) TCPWriter *writer;
jens@2: 
jens@2: /** Reads bytes from the stream, like the corresponding method of NSInputStream.
jens@2:     The number of bytes actually read is returned, or zero if no data is available.
jens@2:     If an error occurs, it will call its -_gotError method, and return a negative number. */
jens@2: - (NSInteger) read: (void*)dst maxLength: (NSUInteger)maxLength;
jens@2: 
jens@0: @end
jens@0: 
jens@0: 
jens@0: 
jens@0: @interface TCPStream (Protected)
jens@0: /** Called when the stream opens. */
jens@0: - (void) _opened;
jens@0: 
jens@0: /** Called when the stream has bytes available to read. */
jens@0: - (void) _canRead;
jens@0: 
jens@0: /** Called when the stream has space available in its output buffer to write to. */
jens@0: - (void) _canWrite;
jens@0:  
jens@0: /** Called when the underlying stream closes due to the socket closing. */
jens@0: - (void) _gotEOF;
jens@0: 
jens@0: /** Call this if a read/write call returns -1 to report an error;
jens@0:     it will look up the error from the NSStream and call gotError: with it.
jens@0:     This method always returns NO, so you can "return [self _gotError]". */
jens@0: - (BOOL) _gotError;
jens@0: 
jens@0: /** Signals a fatal error to the TCPConnection.
jens@0:     This method always returns NO, so you can "return [self _gotError: e]". */
jens@0: - (BOOL) _gotError: (NSError*)error;
jens@0: @end