DEDICATED NETWORK INTERFACE

摘要

Computer communications that are to be recorded are visible to a network interface on a recording computer. The network interface receives the packets to be recorded. The network layer of the recording computer implements a subset of the normal IP module in the network layer. Instead of checking every IP packet, the IP module in the network layer assumes that most IP packets are correctly addressed, internally consistent and of the expected protocol type. The recording computer allocates the received packets to a recording session based upon the value of a field that is at a fixed position within the packet. Packets that are allocated to a session are recorded or associated with other packets that have been allocated to the same session.

主权项

1. A method of recording computer communications, comprising:
receiving, by a transport layer of a recording computer, a first IP packet directed to a recording network interface of the recording computer, wherein the transport layer receives the first IP packet from a network layer of the recording computer; allocating, by the transport layer of the recording computer, the first IP packet to a first recording stream of packets based only upon examining a single value located at the first fixed offset in the first IP packet, wherein the allocation is performed without a protocol type field of the first IP packet having been tested; storing at the recording computer at least a portion of the first IP packet associated with the first recording stream of packets; transmitting a preformatted block of transmit packets at predetermined intervals, wherein the preformatted block of transmit packets are not changed or otherwise processed between the predetermined intervals.