Re: Snort 2.9, RHEL 5 and afpacket DAQ

[Michael Altizer <maltizer () sourcefire com>]

 I'll be removing this maximum value restriction on the next version.  
It was there to keep people from shooting themselves in the foot on 
32-bit machines with limited low memory, but it's probably not worth the 
headache it is causing.

On 10/20/2010 03:03 PM, beenph wrote:
> In daq_afpacket.c there is a #define  which people who would like to 
> set bigger buffer might want to take a look.
> #define AF_PACKET_MAX_BUFFER_SIZE   128
>
> <SNIP>
>   for (entry = config->values; entry; entry = entry->next)
>     {
> *  if (!strcmp(entry->key, "buffer_size_mb"))
> size_str = entry->value;
> *        else if (!strcmp(entry->key, "debug"))
>             debug = 1;
>     }
>     /* Fall back to the environment variable. */
>     if (!size_str)
>         size_str = getenv("AF_PACKET_BUFFER_SIZE");
>
>     if (size_str && strcmp("max", size_str) != 0)
>     {
>         size = strtoul(size_str, NULL, 10);
>         if (size > AF_PACKET_MAX_BUFFER_SIZE)
> *     size = AF_PACKET_MAX_BUFFER_SIZE;
> *    }
> * ** else
>         size = AF_PACKET_MAX_BUFFER_SIZE;
> *
>     /* The size is specified in megabytes. */
>     size = size * 1024 * 1024;
>
> </SNIP>
> On Wed, Oct 20, 2010 at 2:19 PM, Mike Lococo <mikelococo () gmail com 
> <mailto:mikelococo () gmail com>> wrote:
>
>     On 10/20/2010 01:35 PM, Eoin Miller wrote:
>     > afpacket is nearly identical to mmap'd libpcap. Just give afpacket a
>     > bigger buffer and the performace should be extremely comprable,
>     and you
>     > don't have to use super old libpcap anymore.
>
>     I think what Ralf is asserting, and Rich and confirming, is that
>     buffer
>     sizes larger than ~50MB are failing with afpacket (but not with the
>     Woods patches)... so it is not (yet) possible to use a comparable
>     buffer
>     size for some unknown reason.
>
>     Cheers,
>     Mike Lococo
>
>     ------------------------------------------------------------------------------
>     Nokia and AT&T present the 2010 Calling All Innovators-North
>     America contest
>     Create new apps & games for the Nokia N8 for consumers in  U.S.
>     and Canada
>     $10 million total in prizes - $4M cash, 500 devices, nearly $6M in
>     marketing
>     Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi
>     Store
>     http://p.sf.net/sfu/nokia-dev2dev
>     _______________________________________________
>     Snort-users mailing list
>     Snort-users () lists sourceforge net
>     <mailto:Snort-users () lists sourceforge net>
>     Go to this URL to change user options or unsubscribe:
>     https://lists.sourceforge.net/lists/listinfo/snort-users
>     Snort-users list archive:
>     http://www.geocrawler.com/redir-sf.php3?list=snort-users
>
>
>
> ------------------------------------------------------------------------------
> Nokia and AT&T present the 2010 Calling All Innovators-North America contest
> Create new apps&  games for the Nokia N8 for consumers in  U.S. and Canada
> $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing
> Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store
> http://p.sf.net/sfu/nokia-dev2dev
>
>
> _______________________________________________
> Snort-users mailing list
> Snort-users () lists sourceforge net
> Go to this URL to change user options or unsubscribe:
> https://lists.sourceforge.net/lists/listinfo/snort-users
> Snort-users list archive:
> http://www.geocrawler.com/redir-sf.php3?list=snort-users

------------------------------------------------------------------------------
Nokia and AT&T present the 2010 Calling All Innovators-North America contest
Create new apps & games for the Nokia N8 for consumers in  U.S. and Canada
$10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing
Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store 
http://p.sf.net/sfu/nokia-dev2dev

_______________________________________________
Snort-users mailing list
Snort-users () lists sourceforge net
Go to this URL to change user options or unsubscribe:
https://lists.sourceforge.net/lists/listinfo/snort-users
Snort-users list archive:
http://www.geocrawler.com/redir-sf.php3?list=snort-users