enet.h

用于嵌入式系统的TCP/IP协议栈及若干服务

/*
*            Copyright (c) 1998-2001 by NETsilicon Inc.
*
*  This software is copyrighted by and is the sole property of
*  NETsilicon.  All rights, title, ownership, or other interests
*  in the software remain the property of NETsilicon.  This
*  software may only be used in accordance with the corresponding
*  license agreement.  Any unauthorized use, duplication, transmission,
*  distribution, or disclosure of this software is expressly forbidden.
*
*  This Copyright notice may not be removed or modified without prior
*  written consent of NETsilicon.
*
*  NETsilicon, reserves the right to modify this software
*  without notice.
*
*  NETsilicon
*  411 Waverley Oaks Road                  USA 781.647.1234
*  Suite 227                               http://www.netsilicon.com
*  Waltham, MA 02452                       [e-mail]
*
*************************************************************************
*  $Name: Fusion 6.52 Fusion 6.51 $
*  $Date: 2001/12/12 08:14:27 $
*  $Source: M:/psisrc/stack/incl/rcs/enet.h $
*  $Revision: 1.11 $
**************************************************************************
*  File Description:  Ethernet layer definitions
*
**************************************************************************/

#ifndef _ENET_
#define _ENET_

#include "config.h"
#include "ccdep.h"

#define ENET_RAW        0       /* protocol handle */

#define EN_MAX_DATA     1500
#define EN_MIN_DATA     46
#define EN_MIN_PACKET   (EN_MIN_DATA + EN_HDR_SIZE)
#define EN_MAX_PACKET   (EN_MAX_DATA + EN_HDR_SIZE)
#define EN_HDR_SIZE     14
#define EN_JAM_MAX      16
#define EN_BACKOFF_MAX  10      /* maximum backoff exponent */

/* OL: following structures need to be packed */

#define ENH_DEST    0                 /* destination address, 6 bytes     */
#define ENH_SOURCE  6                 /* source address, 6 bytes          */
#define ENH_TYPE    12                /* type 2 bytes                     */
#define SIZEOF_ENH (ENH_TYPE+2)       /* size of ethernet header          */
typedef u8 ENH;

/* Defined Ethernet types */

#define EN_XNS          0x0600  /* XNS Packet */
#define EN_IP           0x0800  /* Darpa Internet Protocol Packet */
#define EN_ARP          0x0806  /* Address Resolution Protocol Packet */
#define EN_RARP         0x8035  /* Reverse Address Resolution Protocol Packet */
#define EN_KDB          0xBEEF  /* EXPERIMENTAL Kernel DeBug Packet */
#define EN_PPPOE_DIS    0x8863  /* PPPoE Protocol Discovery Phase Packet */
#define EN_PPPOE_SES    0x8864  /* PPPoE Protocol Session Phase Packet */

#ifdef  ETHER_PROTOCOL
import  st  en_scomm(m * mp);
import  st  en_up(m * mp);
#endif

/* macro to replace the isbroadcast function */
#define isbroadcast(a48p) \
     ( ( OS_MEMCMP( ((char *)a48p), (char *) &(fns_bcstring[0]),6)) ? false : true)

#endif  /*_ENET_*/