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xCAT Network Boot Agent
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Michael Brown 445ac9fbdc [netdevice] Use link-layer address as part of RNG seed 
iPXE currently seeds the random number generator using the system
timer tick count.  When large numbers of machines are booted
simultaneously, multiple machines may end up choosing the same DHCP
transaction ID (XID) value; this can cause problems.

Fix by using the least significant (and hence most variable) bits of
each network device's link-layer address to perturb the random number
generator.  This introduces some per-machine unique data into the
random number generator's seed, and so reduces the chances of DHCP XID
collisions.

This does not affect the ANS X9.82-compatible random bit generator
used by TLS and other cryptography code, which uses an entirely
separate source of entropy.

Originally-implemented-by: Bernhard Kohl <bernhard.kohl@nsn.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
2013-04-19 14:34:03 +01:00
contrib [contrib] Enable bochs debug port by default 2012-10-05 13:24:07 +01:00
src [netdevice] Use link-layer address as part of RNG seed 2013-04-19 14:34:03 +01:00
COPYING Initial revision 2005-05-17 16:44:57 +00:00
COPYRIGHTS [build] Rename gPXE to iPXE 2010-04-19 23:43:39 +01:00
README [doc] Re-add README file 2010-05-28 00:03:47 +01:00

README 

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org