*
* $Log: arpcache.c,v $
* Revision 1.14 2006/10/05 17:24:41 haraldkipp
* On ARP transmit errors the incomplete cache entry is not removed.
* Subsequent queries will never send out new ARP requests. Many thanks
* to Michael Jones for providing a first solution. I added a check,
* which avoids to remove an already completed entry. Fixes bug #1567783.
*
* Revision 1.13 2005/08/02 17:46:49 haraldkipp
* Major API documentation update.
*
* Revision 1.12 2005/06/05 16:49:09 haraldkipp
* Do not do ARP retries by default.
*
* Revision 1.11 2005/05/16 08:41:25 haraldkipp
* Bugfix: Empty queue before removing entry.
*
* Revision 1.10 2005/04/30 16:42:42 chaac
* Fixed bug in handling of NUTDEBUG. Added include for cfg/os.h. If NUTDEBUG
* is defined in NutConf, it will make effect where it is used.
*
* Revision 1.9 2005/03/13 13:40:32 haraldkipp
* If NutArpOutput() failed, then NutArpCacheQuery() released the already
* released NETBUF. This bug had been fixed. If NutArpAllocNetBuf() fails,
* the ARP entry will now be removed immediately. Additional check for
* valid entry pointer added. These modifications had been suggested by
* Dusan Ferbas. Finally memcpy() has been replaced by a simple loop in order
* to provide a work around for GCC Bug #18251.
*
* Revision 1.8 2005/02/07 18:57:49 haraldkipp
* ICCAVR compile errors fixed
*
* Revision 1.7 2005/02/07 09:26:56 haraldkipp
* Argh! Committed wrong source.
*
* Revision 1.5 2005/02/04 14:55:08 haraldkipp
* Almost a complete redesign. Replaced the ARP timer thread by calling an
* ARP aging routine before each incoming ARP and outgoing IP packet.
* This also fixes the bug, which generated two ARP requests per query.
* Thanks to Dusam Ferbas and Rostislav Hlebak for their help.
*
* Revision 1.4 2004/07/27 19:38:30 drsung
* Under certain circumstances the same ARPENTRY was
* allocated twice.
*
* Revision 1.3 2004/03/18 10:18:01 haraldkipp
* Comments updated
*
* Revision 1.2 2004/02/08 17:14:05 drsung
* arp entries with set ATF_PERM flag are not removed any longer.
*
* Revision 1.1.1.1 2003/05/09 14:41:26 haraldkipp
* Initial using 3.2.1
*
* Revision 1.16 2003/02/04 18:14:56 harald
* Version 3 released
*
* Revision 1.15 2002/06/26 17:29:35 harald
* First pre-release with 2.4 stack
*
*