AFP ( AppleTalk Filing Protocol )

• AFP sets up an environment for a user that appears as if files on a remote file server are available locally.


• Access to server files is handled using the same procedures as access to local files, except that a user must initially establish a connection to the remote file server.


• AFP provides security features that can restrict user access to files.

• APPL index
  Index, beginning with 1, of the first application mapping contained in the frame.



• APPL tag
  Tag information associated with the application mapping contained in the frame.



• Attributes
  Attributes of a file or directory are as follows:


• Directory attributes:
  

  Inv	Invisible to workstation user.
  Sys	System directory.
  Bk	Backup is needed (dir modified).
  RI	Rename inhibit mode set.
  DI	Delete inhibit mode set.



• File attributes:
  

  Inv	Invisible to workstation user.
  MU	Multi-user application.
  RAO	File resource fork already open.
  DAO	File data fork already open.
  RO	Read only mode set for both forks.
  WI	Cannot write to either fork.
  Sys	File is system file.
  Bk	Backup is needed (file modified).
  RI	Rename inhibit mode set.
  DI	Delete inhibit mode set.
  CP	Copy protect mode set.




• Backup date
  Date of the last time the system backed-up the volume or directory.



• Bitmap
  Field containing bits used to indicate the parameters present in request or reply.



• Request count
  Maximum number of files to return for list directory requests.



• Creation date
  Date that the system created the file or directory.



• File creator
  ID string of the application or device that created a file.



• Destination directory ID
  Destination directory ID for a file copy or move.



• Data fork length
  Length of the file.



• Destination volume ID
  Destination volume ID for a file copy or move.



• Directory bitmap
  Field with bits that indicate which directory parameters are present in AFP frames.



• Directory ID
  Identifier associated with the specified directory.



• Desktop database reference number
  Reference number used to access the desktop database.



• File bitmap
  Bits that indicate which file parameters are present in AFP frames.



• Free bytes
  Number of bytes free on the volume.



• Open fork reference number
  Reference code used to access the open fork.



• Group ID
  Group ID used for authentication.



• Group name
  Group name used for authentication.



• Icon tag
  Tag information associated with the specified icon.



• Icon size
  Size of the specified icon, in bytes.



• Icon type
  Type code identifying the specified icon.



• Long name
  Long file name (maximum 31 characters).



• Machine type
  Type of AFP server in use.



• Maximum reply size
  Maximum number of bytes this protocol returns for list directory requests.



• Access mode
  Open mode attributes for a fork, represented as follows:
  

  R	Allows everyone read access.
  W	Allows everyone write access.
  Deny-R	Denies read access if the file is open.
  Deny-W	Denies write access if the file is open.




• Modification date
  Date the system last modified the file or directory.



• New line character
  Character used to indicate a new line (CR, LF) for read data.



• New line mask
  Value used to mask data for comparison to the new line character.



• Offset
  Starting file offset for write commands.



• Offspring count
  Number of files returned for list directory requests.



• Owner ID
  ID of the file or directory.



• Volume password
  Password required for access to the volume.



• Parent directory ID
  ID of the parent directory.



• ProDOS information
  ProDOS file type and Aux type for use by ProDOS workstations.



• Resource fork length
  Length of the file resource fork, in bytes.



• Source directory ID
  Source directory ID for a file copy or move.



• Short name
  Short file name (maximum 12 characters).



• Signature
  Identifies the volume type, as follows:
  

  1	Flat, no support for directories.
  2	Fixed directory ID.
  3	Variable directory ID.




• Source volume ID
  Source volume ID for a file copy.



• Start index
  Start index, beginning with 1, of the requested file list for list directory commands and replies.



• Total bytes
  Total number of bytes on the volume.



• User authentication method
  Type of user authentication in effect.



• User ID
  User ID number used for authentication.



• User name
  User name used for authentication.



• Version
  Version number of AFP in use.



• Volume bitmap
  Field with bits that indicate which volume parameters are present in AFP frames.



• Volume ID
  Identifier associated with the specified volume.



• Volumes
  Number of volumes contained on the server.

■ Parent layer
■ Child layer

TCP

AFP