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/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _IF_ETHER_H_
#define _IF_ETHER_H_
#include <sys/cdefs.h>
#include <sys/types.h>
#include <net/if.h>
#define MACADDR_LEN 6
struct __packed ether_frame {
uint8_t sync[7]; /* Preamble (sync stuff) */
uint8_t spd; /* Start frame delimiter */
uint8_t macd[6]; /* MAC destination */
uint8_t macs[6]; /* MAC source */
uint16_t type; /* Protocol type */
char payload[1]; /* sized @ 1+n */
};
/*
* Used by the driver to buffer packets.
*/
struct etherbuf {
struct ether_frame *frp;
off_t head;
off_t tail;
size_t cap; /* In entries */
};
/*
* Ethernet device
*
* if_ether: E
* driver: D
*
* @if_name: Interface name.
* @tx: Transmit packets (D->E)
*/
struct etherdev {
char if_name[IFNAMESIZ];
struct etherbuf *buf;
ssize_t(*tx)(struct etherdev *ep, const void *buf, size_t len);
char mac_addr[MACADDR_LEN];
};
#endif /* !_IF_ETHER_H_ */
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