Access control to packet transfer based on key match stored in c

Details Access control to packet transfer based on key match stored in c Access control to packet transfer based on key match stored in c

1996-05-20

2000-04-25

Ellis, Richard L.

Electrical computers and digital processing systems: multicomput

Computer-to-computer protocol implementing

Computer-to-computer data transfer regulating

709224, 709250, 370354, 370356, G06F 1336

Patent

active

060555769

ABSTRACT:
A user controlled apparatus and corresponding method for accepting or rejecting a data packet which is being transferred between a client and server over a cable and a cable communication network. A memory system cooperates with a CPU and a cable modem to provide the desired results. The memory system includes applications programs, an applications interface layer, a communications protocol such as TCP/IP layer, a shim and a cable modem driver. The shim layer binds with the TCP/IP layer and the driver by exchanging pointers. The shim intercepts all data packet flow in both directions between the cable modem and the TCP/IP layer. Upon receipt by the shim of a packet received signal, logic intervenes. The logic decides to either pass the packet on or reject it based on the status of a listen flag which may be set by the client and/or the server. If the listen flag is enabled, the packet will be transferred on to the control of the TCP/IP layer by passing the pointers to the stored packet from the shim to the TCP/IP. If the listen flag is not enabled, the packet is rejected by sending a signal to the driver indicating that the packet has been passed on, but not passing on the pointer to the packet to the TCP/IP layer.

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