Flexible Data Packet Modification via Flow Table Pipelines

The patent implements dynamic packet modification by replacing fixed-format conversion with a flexible pipeline of flow tables that can be dynamically programmed. The system uses match fields and action commands that can be configured at runtime to handle different network formats and protocols, allowing the modification behavior to adapt to various packet types and network domains without requiring fixed hard-coded conversion logic.

The patent creates a universal packet modification framework that can handle multiple network formats and protocols through a single programmable system. The flow table pipeline provides multi-functional capabilities by supporting various match criteria and action commands that can be combined to perform different modification operations (copying, setting, incrementing, decrementing, pushing, popping) on different packet fields across various network layers.

The patent segments the packet modification process into discrete, manageable flow tables that operate in a pipeline. Each flow table handles specific matching and action operations, breaking down the complex modification task into smaller units. This segmentation allows the system to achieve flexibility through composition of simple, reusable building blocks rather than requiring a monolithic complex modification engine.

The patent introduces flow tables as intermediary structures between packet input and output. These flow tables act as mediators that buffer and process packet modifications in a controlled manner, separating the matching logic from the action execution. This intermediary layer simplifies the overall system architecture by providing a clear separation of concerns and enabling independent optimization of different processing stages.

The patent performs preliminary actions by pre-configuring flow tables with match fields and action commands before packet processing begins. The flow tables are programmed in advance with the necessary modification rules, allowing packets to be processed quickly through straightforward table lookups and action executions rather than requiring complex runtime decision-making. This preliminary preparation reduces processing time during actual packet handling.

The patent ensures continuous useful action by implementing a pipeline architecture where multiple flow tables process packets in sequence without idle gaps. Each flow table continuously receives and processes packets from the previous stage, maintaining steady throughput. The pipeline design eliminates bottlenecks and ensures that processing resources are continuously utilized, maximizing efficiency despite multiple processing stages.