NETWORK-DATA-PACKET SORTING AND DEMULTIPLEXING

PROBLEM TO BE SOLVED: To provide a further flexibility in sorting and demultiplexing of packet in a network protocol stack. SOLUTION: A packet sorting and processing are enlarged by obtaining an external information from the application scheduled outside the scope of kernel transfer or an interrupt context. In one embodiment, the external information may enlarge a reference of node in a sorting tree with an additional information. An enlargement technique for extending the sorting process is provided until the completion of application scheduled outside the scope of kernel transfer or the interrupt context. The resultant external information is used for enlarging the packet sorting. In the other embodiment, the external information may include authorization of sender of the packet by correlating a tunnel ID with a user ID or using s/ident for an authorization of out-of-band. The sort process allows a site policy to practice.