Re: ISCSI: Urgent pointer consensus

[Silvano Gai <sgai@cisco.com>]

At 12:53 PM 11/14/2000 -0800, Matt Wakeley wrote:
>Daniel Smith wrote:
>

...


>The benefit to analyzers was only a side benefit.  The main reason is to place
>data in memory where it belongs in the presence of lost frames.  See my note
>"ISCSI: Why the use of the Urgent Pointer"


You can do that by writing the payload of TCP packets in memory at an offset given by the "Sequence Number". This will leave holes in the memory for missing packets. You will fill these holes, when packets are received correctly. No need to copy or move a single byte.

-- Silvano


Silvano Gai               
Cisco Systems                  Empowering the Internet Generation
170 West Tasman Drive                         Tel. (408) 527 2690
San Jose, CA, 95134-1706                      Fax. (408) 527 2690
                                                   sgai@cisco.com