Patent ID: 8155108
Filing Date: 2012-04-10
Classification: H04L

Abstract:
1. A method for submitting a TCP data segment stream to an in-line content analysis, said method comprising: receiving from a TCP emitter a first TCP data segment stream from an established TCP connection between the TCP emitter and a TCP receiver; extracting and re-assembling in a reassembly buffer a first byte stream from the first TCP data segment stream to reinforce a packet order based on a sequence number range; passing a second byte stream, which is derived from the first byte stream, to a content analyser to perform a content analysis on said second byte stream; relaying to the TCP receiver a second TCP data segment stream with a byte stream content that is coherent with the second byte stream passed to the content analyser, by maintaining boundaries of the reassembly buffer for the first byte stream in accordance with the sequence number range, wherein segments in the second TCP data segment stream have the same size and the same header as corresponding segments in the first TCP data segment stream, and the relaying of the second TCP data segment stream is based on the sequence number range already processed by the content analyser and the sequence numbers of the first byte stream.