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A method for ip packet fragment reassembly

An IP message and message technology, applied in the field of message transmission, can solve the problem of low TCP reassembly efficiency

Active Publication Date: 2021-08-06
BEIJING ZUOJIANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It can be seen that in the TCP reassembly process, the existing TCP reassembly method searches for the source IP of the TCP fragment message and the corresponding destination IP with the source IP of the TCP fragment message by traversing a plurality of TCP sessions during the TCP reassembly process. During the process, multiple TCP fragments of the same TCP session need to be frequently compared, resulting in low TCP reassembly efficiency
[0004] In the TCP reassembly process, the existing TCP reassembly method searches for the source IP of the TCP fragment message and the destination IP corresponding to the source IP of the TCP fragment message by traversing multiple TCP sessions, and, in the reassembly process, , it is necessary to frequently compare multiple TCP fragments of the same TCP session, so the efficiency of TCP reassembly is low

Method used

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  • A method for ip packet fragment reassembly
  • A method for ip packet fragment reassembly
  • A method for ip packet fragment reassembly

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Embodiment Construction

[0020] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] A method for recombining IP message fragments in the present invention, comprising:

[0022] figure 1 Shown is a schematic diagram of the identity management table, such as figure 1 As shown, the structure for storing the table is a first-in-first-out cache FIFO (hereinafter collectively referred to as FIFO), and the cache size needs to meet the maximum delay of fragmented packets in the entire design.

[0023] The working mechanism of the identification pointer management table includes:

[0024] Linked list initialization: write data from 0 to NUM-1 to FIFO sequentially, where NUM is the cache depth;

[0025] The working process includes:

[0026] 1) Reset initialization: during the reset phase, the identi...

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Abstract

The invention relates to a method for fragmenting and recombining IP packets according to the present invention, which includes: establishing an identification pointer management table; establishing a reorganization information management table; caching IP packets; performing packet timeout management; Control the reading of the reorganized message and send it to the lower-level business processing module. The invention proposes a design method for fragmentation reorganization. The whole design introduces identification (Identification) pointer management, reorganization information management, IP packet buffering, reorganization timeout and reorganization read control to ensure that fragmented packets can quickly locate belonging to A certain IP packet is grouped, and the data is cached to effectively determine whether all packets have ended.

Description

technical field [0001] The invention relates to message transmission technology, in particular to an IP message fragment reassembly method. Background technique [0002] At present, the TCP reassembly method usually monitors all data in the entire connection process during the TCP transmission process, that is, three handshakes establish a connection, and four handshakes disconnect the connection. During data transmission in the middle, since the TCP sequence numbers of each message satisfy a certain sequence relationship, TCP reassembly is performed according to the TCP sequence numbers of each message. It is equivalent to a cloth bag. Open the cloth bag when receiving the TCP three-way handshake, and then put each message into the cloth bag. When receiving the four-way handshake and disconnecting, tie the cloth bag. When the text is reassembled, on the one hand, it is necessary to find the source IP of the TCP fragment message and the destination IP corresponding to the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/951H04L47/43
CPCH04L49/9057
Inventor 郑庭广陈俊来韩强于洪涛
Owner BEIJING ZUOJIANG TECH