Configurable Packet Parser for Multi-Protocol Data Integrity

The patent implements a universal parser architecture that can handle multiple protocols (Ethernet, Fibre Channel, InfiniBand, RoCE, iWARP) and packet formats through a single configurable system. The parser uses protocol identification fields to dynamically select appropriate parsing configurations, enabling one device to perform multiple protocol-specific functions without requiring separate dedicated parsers for each protocol type.

The parser employs dynamic configuration capabilities where parsing parameters, field offsets, and validation rules are adjusted based on the detected protocol type. The system transitions from static protocol-specific parsers to a dynamic universal parser that adapts its behavior in real-time according to the incoming packet's protocol identifier, allowing flexible handling of diverse packet formats.

The parser performs preliminary protocol identification and field location determination at the beginning of packet processing. By pre-identifying the protocol type and pre-calculating the positions of critical fields (headers, payloads, checksums) based on protocol specifications, the system prepares validation parameters in advance, enabling faster subsequent integrity checking without requiring full packet analysis for each protocol.

The data integrity checking process is segmented into protocol-specific validation stages. Each protocol type has its own tailored validation sequence that checks only the relevant fields and checksums appropriate for that protocol, rather than performing a uniform comprehensive check on all packets. This segmentation allows the system to apply optimized validation paths for different protocols, reducing overall processing time while maintaining reliability.

The parser applies different processing qualities to different fields within the packet based on their variability characteristics. Variant fields (such as timestamps, sequence numbers, or network address translation fields) are identified and masked out from integrity checks, while non-variant fields (such as protocol identifiers, fixed header structures, and payload data) are subjected to rigorous integrity validation. This local differentiation allows efficient processing by focusing precision only where necessary.

The system introduces a field classification mechanism that acts as an intermediary between raw packet data and integrity validation. This intermediary layer analyzes packet headers, identifies variant versus non-variant fields based on protocol rules, and generates a masked view of the packet for validation purposes. The intermediary enables the system to distinguish between fields that should be excluded from integrity checks and those that require precise validation, improving efficiency without sacrificing accuracy.