Method of splitting a packet into individual layers for modification and intelligently stitching layers back together after modification and an apparatus thereof
US9531849B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2014 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Oct 19, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/165
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embodiments of the apparatus for modifying packet headers relate to pointer structure for splitting a packet into individual layers and for intelligently stitching them back together. The pointer structure includes N+1 layer pointers to N+1 protocol headers. The pointer structure also includes a total size of all headers. A rewrite engine uses the layer pointers to extract the first N corresponding protocol layers within the packet for modification. The rewrite engine uses the layer pointers to form an end point, which together with the total size of all headers is associated with a body of the headers. The body of the headers is a portion of headers that are not modified by the rewrite engine. After all the modifications are performed and modified headers are compressed, the modified layer pointers are used to stitch the modified headers back together with the body of the headers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.