From the Team Optimus Prime presentation (expires December 4, 2010):

Field Types

The field types and intended purpose are defined in this section. It can be noted that if necessary, the protocol can be reworked to include sending image data as binary strings in predetermined formats. For our implementation, we assume a fixed set of icons with varying “styles” for distinction (color, size, etc).

Int – 4 bytes

Long – 8 bytes

Point – 2 Integers in succession (co-ordinates)

Date – Integer in Unix date format

Byte – 1 byte, usually for toggling bits

String – n bytes, null terminated, preceded by a length field

Array – set of one to n (1..n) objects of a given type, stored object after object, always preceded by a length field

Typical Bit Flags

There are several typical bit patterns that are outlined in the following section. These patterns should remain consistent across systems for compatibility reasons. The use of bit flags makes messages much more compact and easy to maintain.

ObjectType

• 0x01 – Supply
• 0x02 – Disease
• 0x03 – User
• 0x04 – Shipment

RequestType

• 0x01 – Supply
• 0x02 – Disease
• 0x03 – Combination of Supply and Disease

AttributeType

• 0x01 – Integer
• 0x02 – Point
• 0x03 – Date
• 0x04 – Byte
• 0x05 – String

Status

• 0x01 – Success
• 0x02 – Failure
• 0x03 – Warning

Mode

• 0x01 – View
• 0x02 – Create
• 0x03 – Close
• 0x04 – Send
• 0x05 – Receive

Icon

• 0x00 – 0xFF – Icon Index

UserType

• 0x01 – Medical Clerk
• 0x02 – Medical Administrator
• 0x03 – System Administrator

PacketType

• 0x01 – CreateObjectRequest
• 0x02 – CreateObjectReply
• 0x03 – UpdateObjectRequest
• 0x04 – UpdateObjectReply
• 0x05 – RequestObjectRequest
• 0x06 – RequestObjectReply
• 0x07 –RequestShipmentRequest
• 0x08 – RequestShipmentReply
• 0x09 – FilterDataRequest
• 0x0A – FilterDataResponse
• 0x0B – UserLoginRequest
• 0x0C – UserLoginReply

CreateObject – Request

• PacketType – byte
• PacketLength – long
• ObjectType – byte
• AttributesCount – int
• Attributes – array

o   AttributeNameLength – int

o   AttributeName – string

o   AttributeType – byte

o   AttributeValueLength – int

o   AttributeValue – string

CreateObject – Reply

• PacketType – byte
• PacketLength – long
• Status – byte

UpdateObject – Request

• PacketType – byte
• PacketLength – long
• RequestType – byte
• ObjectLocationLength – int
• ObjectLocation – string
• ObjectCount – int

UpdateObject – Reply

• PacketType – byte
• PacketLength – long
• Status – byte

RequestObject – Request

• PacketType – byte
• PacketLength – long
• RequestType – byte
• TopLeft – Point
• BottomRight – point

RequestObject – Reply

• PacketType – byte
• PacketLength – long
• DiseasesCount – int
• Diseases – Array

o   NameLength – int

o   Name – string

o   Epicenter – point

o   Count – int

o   Icon – int

• SuppliesCount – int
• Supplies – Array

o   NameLength – int

o   Name – string

o   Epicenter – point

o   Count – int

o   Icon – int

RequestShipments – Request

• PacketType – byte
• PacketLength – long
• Mode – byte

RequestShipments – Reply

• PacketType – byte
• PacketLength – long
• ShipmentListCount – int
• ShipmentList – Array

o   ShipmentState – byte

o   ShipmentOriginLength – int

o   ShipmentOrigin – string

o   ShipmentDestinationLength – int

o   ShipmentDestination – string

o   ShipmentContentsLength – int

o   ShipmentContents – Array

o   ItemNameLength – int

o   ItemName – string

o   ItemCount – int

FilterData – Request

• PacketType – byte
• PacketLength – long
• RequestType – byte
• TopLeft – point
• BottomRight – point
• StartDate – date
• EndDate – date

FilterData – Response

• PacketType – byte
• PacketLength – long
• DiseasesCount – int
• Diseases – Array

o   NameLength – int

o   Name – string

o   Epicenter – point

o   Count – int

o   Icon – byte

• SuppliesCount – int
• Supplies – Array

o   NameLength – int

o   Name – string

o   Epicenter – point

o   Count – int

o   Icon – byte

UserLogin – Request

• PacketType – byte
• PacketLength – long
• Mode – byte
• UsernameLength – Short
• Username – string
• PasswordLength – Short
• Password – string

UserLogin – Response

• PacketType – byte
• PacketLength – long
• Status – byte
• UserType – byte