5 results about "Type-length-value" patented technology

In one implementation, a device may obtain a Simple Two-way Active Measurement Protocol test packet that includes hop-by-hop data collected by the Simple Two-way Active Measurement Protocol test packet along its path. The device may determine whether the Simple Two-way Active Measurement Protocol test packet includes an instruction to reflect the hop-by-hop data back to an originating session sender. The device may copy, based on a determination that the Simple Two-way Active Measurement Protocol test packet includes the instruction, the hop-by-hop data into a type-length-value segment of a reply Simple Two-way Active Measurement Protocol test packet. The device may transmit the reply Simple Two-way Active Measurement Protocol test packet back to the originating session sender.

This invention discloses a method and related equipment for identifying key fields in industrial control protocols, belonging to the field of cyberspace security technology. The method includes: if a delimiter exists in the message, identifying key fields in the protocol using the features of the delimiter; if no delimiter exists in the message, performing type-length-value decoding on the protocol; if decoding is successful, identifying key fields in the protocol using type-length-value decoding; if decoding fails, when there is only one length field in the protocol, identifying the length field based on the correlation between the message length difference and the field value difference, and identifying the structure identifier field based on the consistency of the field value in similar messages; when there are multiple length fields in the protocol, identifying the structure identifier field based on the protocol spectrum and convolutional neural network, and identifying the length field based on multidimensional hypothesis testing. This method can effectively identify structure identifier fields and length fields in industrial control protocols.

This application relates to the field of network security technology and discloses a method for extracting the TLS protocol extension SNI based on FPGA. The method includes: receiving network packets; extracting layer 2, 3, and 4 protocol header information and calculating and locating the payload content and starting position; determining whether the packet is a TLS Client Hello packet under the TCP protocol based on the payload content; if so, parsing the common fields of the payload according to the TLS Client Hello packet format and calculating the starting offset of the first extension header field; starting from this starting offset, sequentially parsing and matching the type-length-value format of the extension header fields until the SNI extension header field is identified or all extension header fields have been traversed; if the SNI extension header field is identified, extracting and outputting the SNI information from the corresponding value field according to its length indicator field. This method is implemented based on FPGA hardware logic, has high extraction accuracy, low logic resource consumption, and can achieve parallel processing of multiple packets, meeting the actual requirements of network traffic splitting devices for SNI information extraction.

Embodiments of the present application provide a data communication method and device, electronic equipment and storage medium. The method comprises: in response to a data transmission request, collecting a plurality of register data of a terminal device; according to the continuity of the plurality of register data, classifying and processing the plurality of register data to obtain a plurality of register data groups; encapsulating each register data group according to a type length value as a frame structure rule to obtain a plurality of data packets; splicing the plurality of data packets and a target protocol header to obtain a service message; and sending the service message to a receiving end. The above scheme classifies and structurally encapsulates register data, compresses register data originally requiring multiple rounds of message interaction into a single frame message, reduces the number of communications, and thus improves communication efficiency.

A method implemented by a network node in a Bit Index Explicit Replication Traffic Engineering (BIER-TE) domain is used to provide fast egress protection. The method includes receiving a type length value (TLV) structure that includes a bit position of a backup egress node for a primary egress node, generating an egress protection bit index forwarding table (EP-BIFT) including the backup path to the backup egress node based on the bit position of the backup egress node when the network node neighbors the primary egress node, and forwarding a packet in accordance with the EP-BIFT when the primary egress node has failed.