TCP/IP offload device with fast-path TCP ACK generating and transmitting mechanism
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United States of America Patent
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Jan 23, 2007
Grant Date -
Jul 18, 2002
app pub date -
Feb 26, 2002
filing date -
Oct 14, 1997
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Abstract
A network interface device has a fast-path ACK generating and transmitting mechanism. ACKs are generated using a finite state machine (FSM). The FSM retrieves a template header and fills in TCP and IP fields in the template. The FSM is not a stack, but rather fills in the TCP and IP fields without performing transport layer processing and network layer processing sequentially as separate tasks. The filled-in template is placed into a buffer and a pointer to the buffer is pushed onto a high-priority transmit queue. Pointers for ordinary data packets are pushed onto a low-priority transmit queue. A transmit sequencer outputs a packet by popping a transmit queue, obtaining a pointer, and causing information pointed to by the pointer to be output from the network interface device as a packet. The sequencer pops the high-priority queue in preference to the low-priority queue, thereby accelerating ACK generation and transmission.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- ALACRITECH, INC.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Blightman, Stephen E J | San Jose, CA | 46 | 6950 |
Boucher, Laurence B | Saratoga, CA | 67 | 12850 |
Craft, Peter K | San Francisco, CA | 69 | 9817 |
Higgen, David A | Saratoga, CA | 55 | 8881 |
Philbrick, Clive M | San Jose, CA | 78 | 11783 |
Starr, Daryl D | Milpitas, CA | 60 | 9871 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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