11 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.

The invention provides a data transmission verification method and device, electronic equipment and a storage medium, and relates to the technical field of network communication, a unique connection identifier is allocated in a connection establishment stage of two communication parties, and a serial number field is designed as a combination of message length information and a random number; a connection identifier and a serial number field are packaged at the head and the tail of the data message respectively, a type-length-value structure message is carried in the middle of the data message, and the consistency of the connection identifier and the serial number field at the head and the tail of the data message is verified after the received message is de-packaged; and when verification fails, the current connection is terminated, and the connection is triggered to be reestablished to retransmit data, so that the problems that packet loss, data tampering or errors are easy to occur during RoCE data transmission in the prior art, and a traditional verification mode is high in calculation complexity, large in occupied bandwidth and high in reliability can be solved. And a traditional retransmission mode is easy to cause system performance reduction or system abnormity caused by access of a wrong memory address.

To reduce processing for acquiring reference clock information on a reception side.SOLUTION: Transmission apparatus 30 includes a generator that generates a frame for transmission that stores a plurality of slots each containing one or more TLV (TypeLengthValue) packets obtained by multiplexing content, and a transmitter that transmits the frame for transmission, wherein a TLV packet positioned at a head within a head slot within the frame for transmission contains an IP (InternetProtocol) packet containing first reference clock information, and the IP packet containing the first reference clock information does not undergo header compression and is given a predetermined IP address.SELECTED DRAWING: Figure 35

A method implemented by a network node in a Bit Index Explicit Replication (BIER) domain is used to provide fast egress protection. The method includes receiving a type length value (TLV) structure that identifies a backup egress node for a destination network node and includes an entry that indicates whether a primary egress node and the backup egress node transmit a packet to a same customer edge (CE) or to different customer edges (CEs), generating an egress protection bit index forwarding table (EP-BIFT) including the backup egress node and the entry that indicates whether the primary egress node and the backup egress node transmit the packet to the same CE or to different CEs, and forwarding the packet in accordance with the EP-BIFT when the primary egress node has failed.

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.

The present invention discloses a segment routing data forwarding method and system based on address mapping. The method comprises the following steps: S1, designing a segment routing segment identifier space and defining the segment identifier type for segment routing; S2, extending the IPv4 header by adding a segment routing list option field to support segment routing message forwarding; S3, encapsulating a route-associated measurement TLV (type-length-value) in the segment routing list option to support network fault management and performance measurement; S4, encapsulating a segment routing header and an IPv4 header outside the data message during data forwarding; and S5, performing segment routing message forwarding processing. The present invention aims to address the problem of limited existing network routing strategies and the difficulty in accurately measuring network performance.

A method implemented by a network node in a Bit Index Explicit Replication Traffic Engineering (BIER-TE) domain for providing fast egress protection. The method comprises: receiving a type length value (TLV) structure, wherein the TLV structure comprises a bit position of a backup egress node of a primary egress node; generating an egress protection bit index forwarding table (EP-BIFT) according to the bit position of the backup egress node when the network node is adjacent to the primary egress node, wherein the EP-BIFT comprises a backup path to the backup egress node; and forwarding a packet according to the EP-BIFT when the primary egress node fails.