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136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2010 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \author Andrea Righi <arighi@develer.com>
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*
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* \brief Ethernet standard descriptors
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*
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* $WIZ$ module_name = "eth"
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* $WIZ$ module_configuration = "bertos/cfg/cfg_eth.h"
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* $WIZ$ module_supports = "at91sam7x or sam3x"
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* $WIZ$ module_hw = "bertos/hw/hw_eth.h", "bertos/hw/hw_eth.c"
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*/
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#ifndef DRV_ETH_H
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#define DRV_ETH_H
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#include "hw/hw_eth.h"
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#include <cpu/types.h>
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#define ETH_ADDR_LEN 6
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#define ETH_HEAD_LEN 14
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#define ETH_DATA_LEN 1500
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#define ETH_FRAME_LEN (ETH_HEAD_LEN + ETH_DATA_LEN)
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#define ETH_TYPE_IP 0x0800
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typedef union Ethernet
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{
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struct
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{
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uint8_t dst[ETH_ADDR_LEN];
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uint8_t src[ETH_ADDR_LEN];
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uint16_t type;
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uint8_t data[0];
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};
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uint8_t raw[ETH_FRAME_LEN];
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} PACKED Ethernet;
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/**
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* Determine if ethernet address \a addr is a all zero.
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*/
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INLINE int eth_addrIsZero(const uint8_t *addr)
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{
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return !(addr[0] | addr[1] | addr[2] |
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addr[3] | addr[4] | addr[5]);
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}
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/**
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* Determine if ethernet address \a addr is a multicast address.
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*/
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INLINE int eth_addrIsMcast(const uint8_t *addr)
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{
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return (0x01 & addr[0]);
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}
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/**
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* Determine if ethernet address \a addr is locally-assigned (IEEE 802).
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*/
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INLINE int eth_addrIsLocal(const uint8_t *addr)
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{
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return (0x02 & addr[0]);
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}
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/**
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* Determine if ethernet address \a addr is broadcast.
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*/
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INLINE bool eth_addrIsBcast(const uint8_t *addr)
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{
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return (addr[0] & addr[1] & addr[2] &
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addr[3] & addr[4] & addr[5]) == 0xff;
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}
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/**
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* Check if the ethernet address \a addr is not all zero, is not a multicast
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* address, and is not broadcast.
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*/
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INLINE bool eth_addrIsValid(const uint8_t *addr)
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{
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return !eth_addrIsMcast(addr) && !eth_addrIsZero(addr);
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}
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/**
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* Compare two ethernet addresses: \a addr1 and \a addr2, returns 0 if equal.
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*/
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INLINE bool eth_addrCmp(const uint8_t *addr1, const uint8_t *addr2)
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{
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return !!((addr1[0] ^ addr2[0]) |
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(addr1[1] ^ addr2[1]) |
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(addr1[2] ^ addr2[2]) |
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(addr1[3] ^ addr2[3]) |
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(addr1[4] ^ addr2[4]) |
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(addr1[5] ^ addr2[5]));
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}
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ssize_t eth_putFrame(const uint8_t *buf, size_t len);
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void eth_sendFrame(void);
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size_t eth_getFrameLen(void);
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ssize_t eth_getFrame(uint8_t *buf, size_t len);
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ssize_t eth_send(const uint8_t *buf, size_t len);
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ssize_t eth_recv(uint8_t *buf, size_t len);
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int eth_init(void);
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#endif /* DRV_ETH_H */
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