Access control to packet transfer based on key match stored in cable modem hardware unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 25, 2000
Grant Date -
N/A
app pub date -
May 20, 1996
filing date -
May 20, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
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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