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GOEP (Generic Object Exchange Profile)

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Introduction

The Generic Object Exchange Profile (GOEP) is a protocol specification that allows devices to exchange objects (files) over a wireless communication link. It is one of the profiles defined by the Bluetooth Special Interest Group (SIG) and is based on the Object Exchange (OBEX) protocol. GOEP is used in a variety of applications, including file transfer, synchronisation, and printing.

GOEP Architecture

GOEP is based on a client-server model, with the client being the device that initiates the transfer and the server being the device that responds to the client's requests. The client initiates the transfer by sending a request to the server, and the server responds by sending the requested data back to the client. GOEP uses the OBEX protocol to exchange data between devices.

GOEP defines a number of roles that a device can play in a transfer, including:

  1. Initiator - The device that initiates the transfer.
  2. Acceptor - The device that accepts the transfer.
  3. Server - The device that provides the service being requested.
  4. Client - The device that requests the service.

GOEP defines a set of operations that can be performed on objects, including:

  1. Connect - Establish a connection between the client and server.
  2. Put - Send an object from the client to the server.
  3. Get - Retrieve an object from the server.
  4. Delete - Delete an object from the server.
  5. SetPath - Set the current folder on the server.
  6. Abort - Abort a transfer in progress.

GOEP also defines a set of headers that can be used to control the transfer, including:

  1. Name - The name of the object being transferred.
  2. Type - The type of the object being transferred.
  3. Length - The length of the object being transferred.
  4. Time - The time the object was last modified.
  5. Description - A description of the object.
  6. Target - The destination folder on the server.
  7. HTTP - Additional HTTP headers.

GOEP also defines a number of error codes that can be returned during a transfer, including:

  1. Success - The transfer was successful.
  2. Created - The object was created on the server.
  3. Accepted - The request was accepted by the server.
  4. Non-Authoritative Information - The server is not the authoritative source for the object.
  5. No Content - The server has no content to return.
  6. Reset Content - The server has reset the connection.
  7. Partial Content - The server is returning part of the object.

GOEP also defines a number of security mechanisms that can be used to protect the transfer, including:

  1. Authentication - Verify the identity of the client or server.
  2. Authorization - Determine whether the client or server has permission to perform the requested operation.
  3. Encryption - Encrypt the data being transferred.

GOEP Profiles

GOEP defines a number of profiles that describe how it can be used in different applications. These profiles specify the operations, headers, and error codes that are relevant to a particular application.

  1. Generic Object Exchange Profile (GOEP) - This is the basic GOEP profile and provides support for object exchange between devices.
  2. Object Push Profile (OPP) - This profile is used for sending objects from one device to another.
  3. File Transfer Profile (FTP) - This profile is used for transferring files between devices.
  4. Synchronization Profile (SYNC) - This profile is used for synchronizing data between devices.
  5. Print Profile (BPP) - This profile is used for printing documents from a device to a printer.

Conclusion

The Generic Object Exchange Profile (GOEP) is a protocol specification that allows devices to exchange objects (files) over a wireless communication link. GOEP is based on the Object Exchange (OBEX) protocol and defines a client-server model, a set of operations, headers, error codes, and security mechanisms that can be used to transfer objects between devices.

GOEP defines a number of profiles that describe how it can be used in different applications, including the Generic Object Exchange Profile (GOEP), Object Push Profile (OPP), File Transfer Profile (FTP), Synchronization Profile (SYNC), and Print Profile (BPP).

GOEP provides a flexible and efficient mechanism for transferring objects between devices. It can be used in a variety of applications, including file transfer, synchronisation, and printing. GOEP has been widely adopted by the industry and is supported by many devices, making it an important protocol for wireless communication.