eth.h

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/*
 * Copyright (c) 2009 Lukas Mejdrech
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 NET_ETH_H_
#define NET_ETH_H_

#include <fibril_synch.h>
#include <ipc/services.h>

#include <net/device.h>
#include <adt/measured_strings.h>

#define ETH_ADDR  6

#define ETH_PREAMBLE  0x55

#define ETH_SFD  0xD5

#define IEEE_8023_2_UI  0x03

typedef struct eth_header_snap eth_header_snap_t;

typedef struct eth_header_lsap eth_header_lsap_t;

typedef struct eth_ieee_lsap eth_ieee_lsap_t;

typedef struct eth_snap eth_snap_t;

typedef struct eth_preamble eth_preamble_t;

typedef struct eth_header eth_header_t;

struct eth_ieee_lsap {
        uint8_t dsap;
        
        uint8_t ssap;
        
        uint8_t ctrl;
} __attribute__ ((packed));

struct eth_snap {
        uint8_t protocol[3];
        
        uint16_t ethertype;
} __attribute__ ((packed));

struct eth_preamble {
        uint8_t preamble[7];
        
        uint8_t sfd;
} __attribute__ ((packed));

struct eth_header {
        uint8_t destination_address[ETH_ADDR];
        uint8_t source_address[ETH_ADDR];
        
        uint16_t ethertype;
} __attribute__ ((packed));

struct eth_header_lsap {
        eth_header_t header;
        
        eth_ieee_lsap_t lsap;
} __attribute__ ((packed));

struct eth_header_snap {
        eth_header_t header;
        
        eth_ieee_lsap_t lsap;
        
        eth_snap_t snap;
} __attribute__ ((packed));

typedef uint32_t eth_fcs_t;

typedef struct eth_globals eth_globals_t;

typedef struct eth_device eth_device_t;

typedef struct eth_proto eth_proto_t;

DEVICE_MAP_DECLARE(eth_devices, eth_device_t);

INT_MAP_DECLARE(eth_protos, eth_proto_t);

struct eth_device {
        device_id_t device_id;
        services_t service;
        int phone;
        size_t mtu;
        
        int flags;
        
        measured_string_t *addr;
        
        uint8_t *addr_data;
};

struct eth_proto {
        services_t service;
        int protocol;
        int phone;
};

struct eth_globals {
        int net_phone;
        fibril_rwlock_t devices_lock;
        eth_devices_t devices;
        fibril_rwlock_t protos_lock;
        
        eth_protos_t protos;
        
        measured_string_t *broadcast_addr;
};

#endif

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