Prevention and detection of IP identification wraparound errors
US6894976B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2000 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Jan 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/166
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of generating IP identification numbers for IP datagrams. A plurality of IP identification number generators are maintained. A plurality of receiving stations are associated with the plurality of IP identification number generators such that each receiving station has an IP identification number generator associated therewith. An IP identification number is generated for a datagram sent to a receiving station based on an output of the associated IP identification number generator. Also, a method of reducing a likelihood of misassembly of received data fragments from fragmented IP datagrams. The data fragments have an IP identification number. All received data fragments of the datagram are discarded upon detection of receipt of an overlapping data fragment having the IP identification number. Timeouts for reassembling datagrams are reduced. First, timeouts for reassembling the datagrams are reduced to less than a standard timeout. Second, timeouts are reduced upon detection of a gap in the received data fragments. Third, timeouts are reduced upon detection of a datagram having the same protocol identification number and source address, but having a different IP identificat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.