Protocols

The libpok layer contains predefined protocols to marshall/unmarshall application data before sending them on the network. These protocols library could be used for several purposes: encrypt data before sending it on an unsecure network, adapt application data to constrained protocols such as CORBA, ...

These protocols can be automatically used through AADL models and appropriate properties associated to AADL data ports on AADL process components. To have more information about AADL and protocol binding, see section 4.

At this time, the libpok layer is focuses on crypto and provides the following protocols:

• Ceasar
• DES
• SSL

For each protocol, we have:

• A function to marshall data.
• A function to unmarshall data.
• An associated type if the protocol needs a special data type to store marshalled values.

Marshalling functions and types are described in their header files (see des.h, ssl.h, ceasar.h and so on). If there is no associated marshalling type, then, the marshall/unmarshall functions uses the same type as the application type or not particular type are required.

Details of each protocol can be found in the API section (chapter 8).