초록 ▼

A system and method for sending and receiving data with a reliable communication protocol. The system includes a computer at a node having a backplane, a CPU board plugged into the backplane, software instructions for the CPU, and a special network board plugged into the backplane. The CPU board, so

A system and method for sending and receiving data with a reliable communication protocol. The system includes a computer at a node having a backplane, a CPU board plugged into the backplane, software instructions for the CPU, and a special network board plugged into the backplane. The CPU board, software, and network card act to implement the TCP/IP protocol suite. The network card or board includes an interface to receive data packets from the physical layer, and circuitry to verify the TCP checksum before de-encapsulation and routing of the TCP segment by the network layer software. It also includes circuitry to automatically prepare the acknowledgement signal to be sent by the receiving computer to the sending computer. It additionally includes circuitry to calculate the error detecting code on outgoing signals from the sending computer to the receiving computer.

대표청구항 ▼

[ What is claimed is:] [1.] A method of reliably constructing TCP/IP datagrams for transmission from a local node on one computer network to a remote node on another computer network comprising the steps of:generating a message, which forms a portion of a transport layer of a communications protocol

[ What is claimed is:] [1.] A method of reliably constructing TCP/IP datagrams for transmission from a local node on one computer network to a remote node on another computer network comprising the steps of:generating a message, which forms a portion of a transport layer of a communications protocol;buffering said message in at least one of a plurality of buffers between said transport layer of said communications protocol and a network layer of said communications protocol;forwarding said message from said at least one of said plurality of buffers to a buffer in said network layer of said communications protocol executing on a network card;monitoring said forwarding step in order to calculate a TCP segment checksum;composing a TCP header including said TCP segment checksum, said composing step being executed on said network card;pre-pending said TCP header to said message thereby creating an IP datagram in a buffer on said network card;calculating an IP checksum;composing in protocol logic executing on said network card an IP header including said IP checksum;pre-pending said IP header to said IP datagram thereby creating datalink data in said buffer on said network card;forwarding said datalink data to a datalink layer protocol interface on said network card;composing a datalink routing header in said datalink layer protocol interface on said network card, said datalink routing header including an address of a next intermediate node in a network transmission path to a destination;pre-pending said datalink routing header to said datalink data to create a final datagram; andtransmitting said final datagram over at least one physical medium to said remote node.