TCP Stack Identification via SYN Packet Data Field
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Solution Overview
Problem
Current information handling systems lack a mechanism to identify the type of TCP/IP stack used by nodes in a communication network, which is crucial for security and resource allocation decisions, as the type of stack can vary and is not inherently known to other nodes.
Innovation Solution
A method is introduced to identify the TCP stack type by setting the SYN bit in a SYN packet and including a code in the data field to specify the stack type, allowing receiving nodes to determine the stack type of transmitting nodes within existing TCP packet formats without additional formatting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanism is introduced to identify TCP stack type, then security and resource allocation decision-making is improved, but device complexity increases
Solution Approach 1:
The patent merges the TCP stack type identification function with the existing SYN packet structure by utilizing the Data field. Instead of creating a separate identification mechanism, the invention combines the identification code transmission with the standard TCP handshake process, thereby improving security decision-making without adding separate complex identification devices or protocols.
Solution Approach 2:
The SYN packet's Data field is given a dual function: it maintains its traditional role in TCP connection establishment while simultaneously carrying the TCP stack type identification code. This multi-functionality approach allows the same packet structure to serve both connection management and identification purposes, avoiding the need for additional dedicated identification packets or mechanisms.
2Measurement precision
If additional formatting of TCP packet is implemented, then TCP stack type identification is achieved, but ease of operation deteriorates
Solution Approach 1:
The identification code is merged into the existing Data field of the TCP packet structure. Rather than implementing additional formatting or creating new packet types, the invention utilizes the already-present Data field to carry the identification information, thereby achieving precise stack type identification without requiring changes to the fundamental packet formatting or handling procedures.
3Productivity
If TCP stack type identification is implemented, then network management efficiency is improved, but loss of information increases
Solution Approach 1:
The invention uses only a portion of the Data field to carry the TCP stack type identification code, rather than utilizing the entire field or requiring additional packets. This partial action approach provides sufficient identification information for network management decisions while leaving the rest of the Data field available for its traditional purposes, thus avoiding information loss.
Data Source
AI summary
A method for identifying the TCP stack type of a transmitting node is disclosed in which a SYN packet is identified by the setting of the SYN bit in the packet. Following the identification of a set SYN bit in the SYN packet, the content of the data field includes a code to identify the TCP stack type associated with the node that transmitted the SYN packet.