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//
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// BLIP_Internal.h
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// MYNetwork
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//
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// Created by Jens Alfke on 5/10/08.
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// Copyright 2008 Jens Alfke. All rights reserved.
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//
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#import "BLIPConnection.h"
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#import "BLIPRequest.h"
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#import "BLIPProperties.h"
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@class BLIPWriter;
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/* Private declarations and APIs for BLIP implementation. Not for use by clients! */
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/* BLIP message types; encoded in each frame's header. */
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typedef enum {
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kBLIP_MSG, // initiating message
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kBLIP_RPY, // response to a MSG
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kBLIP_ERR // error response to a MSG
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} BLIPMessageType;
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/* Flag bits in a BLIP frame header */
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enum {
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kBLIP_TypeMask = 0x000F, // bits reserved for storing message type
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kBLIP_Compressed= 0x0010, // data is gzipped
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kBLIP_Urgent = 0x0020, // please send sooner/faster
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kBLIP_NoReply = 0x0040, // no RPY needed
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kBLIP_MoreComing= 0x0080, // More frames coming (Applies only to individual frame)
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kBLIP_Meta = 0x0100, // Special message type, handled internally (hello, bye, ...)
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};
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typedef UInt16 BLIPMessageFlags;
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/** Header of a BLIP frame as sent across the wire. All fields are big-endian. */
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typedef struct {
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UInt32 magic; // magic number (kBLIPFrameHeaderMagicNumber)
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UInt32 number; // serial number of MSG
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BLIPMessageFlags flags; // encodes frame type, "more" flag, and other delivery options
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UInt16 size; // total size of frame, _including_ this header
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} BLIPFrameHeader;
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#define kBLIPFrameHeaderMagicNumber 0x9B34F206
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#define kBLIPProfile_Hi @"Hi" // Used for Profile header in meta greeting message
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#define kBLIPProfile_Bye @"Bye" // Used for Profile header in meta close-request message
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@interface BLIPConnection ()
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- (void) _dispatchRequest: (BLIPRequest*)request;
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- (void) _dispatchResponse: (BLIPResponse*)response;
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@end
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@interface BLIPMessage ()
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@property BOOL sent, propertiesAvailable, complete;
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- (BLIPMessageFlags) _flags;
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- (void) _setFlag: (BLIPMessageFlags)flag value: (BOOL)value;
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- (void) _encode;
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@end
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@interface BLIPMessage ()
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- (id) _initWithConnection: (BLIPConnection*)connection
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isMine: (BOOL)isMine
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flags: (BLIPMessageFlags)flags
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number: (UInt32)msgNo
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body: (NSData*)body;
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- (BOOL) _writeFrameTo: (BLIPWriter*)writer maxSize: (UInt16)maxSize;
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@property (readonly) SInt32 _bytesWritten;
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- (void) _assignedNumber: (UInt32)number;
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- (BOOL) _receivedFrameWithHeader: (const BLIPFrameHeader*)header body: (NSData*)body;
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- (void) _connectionClosed;
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@end
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@interface BLIPRequest ()
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- (id) _initWithConnection: (BLIPConnection*)connection
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body: (NSData*)body
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properties: (NSDictionary*)properties;
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@end
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@interface BLIPResponse ()
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- (id) _initWithRequest: (BLIPRequest*)request;
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@end
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