On Fri, 13 Aug 2004, Todd Lyons wrote: > Erich Titl wanted us to know: > > >Nice, we could actually build a wrapper around freshclam to only fetch when > >there is a new version ready. > > It already does this. > > It only retrives the first 512 bytes of data from each CVD file. Here > is what a sample return packet looks like: > > So it does not download each file in its entirety as people have been > suggesting.
Good to know, and maybe that means we're wasting our time on all these other ideas. But still, checking DNS for an update means a single UDP packet each way (which might even get cached). Downloading the first 512 bytes requires something like: SYN SYN-ACK ACK PUSH (request for data) ACK (response with data) FIN FIN-ACK ACK Plus, the server needs to handle the stateful connection. Seems a lot worse when you look at it this way. ;) Damian Menscher -- -=#| Physics Grad Student & SysAdmin @ U Illinois Urbana-Champaign |#=- -=#| 488 LLP, 1110 W. Green St, Urbana, IL 61801 Ofc:(217)333-0038 |#=- -=#| 4602 Beckman, VMIL/MS, Imaging Technology Group:(217)244-3074 |#=- -=#| <[EMAIL PROTECTED]> www.uiuc.edu/~menscher/ Fax:(217)333-9819 |#=- -=#| The above opinions are not necessarily those of my employers. |#=- ------------------------------------------------------- SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33 Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift. http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285 _______________________________________________ Clamav-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/clamav-users
