netdev.h

来自「ADS下的bios工程」· C头文件 代码 · 共 275 行

#ifndef _BIOS_NETDEV_H
#define _BIOS_NETDEV_H

#include <bios/types.h>

/* HEX NUMBER ENDIAN TRANSLATION */

#ifdef CONFIG_CPU_BIG_ENDIAN
#define htonl(x)	(x)
#define htons(x)	(x)
#else
#define htonl(x)	(((x) & 0x000000ff) << 24 |\
			 ((x) & 0x0000ff00) << 8  |\
			 ((x) & 0x00ff0000) >> 8  |\
			 ((x) & 0xff000000) >> 24)

#define htons(x)	(((x) & 0x000000ff) << 8 |\
			 ((x) & 0x0000ff00) >> 8)
#endif

/* Define structure media type */
typedef enum {
	media_autodetect,
	media_coax,
	media_utp,
	media_aui
} media_t;


/* ********************************************/
/* Define structure for network device buffer */
/* ********************************************/
struct buflist {
	void           	*data;
        int             size;
       	struct buflist  *next;
};
    
/* ********************************************/
/*             Ethernet Protocol              */
/* ********************************************/
#define SIZEOF_ETHHDR   14

#define ETH_P_UDP       0x11
#define ETH_P_IP        0x0800
#define ETH_P_ARP       0x0806
#define ETH_ALEN        6         /* 6 bytes */
#define ETH_DATA_LEN    1506      /* 6 bytes */
#define ETH_FRAME_LEN   1514+22   /* 1536 bytes */
#define ETH_ZLEN        60        /* Min. octets in frame sans FCS */

struct ethhdr {
	unsigned char   eth_dest[ETH_ALEN];
	unsigned char   eth_source[ETH_ALEN];
	unsigned short  eth_proto;
};

/*********************************************/
/*           ARP Protocol                    */
/*********************************************/
#define ARPHRD_ETHER  1               /* Ethernet 10/100Mbps.  */

struct arphdr { 
	u16     ar_hrd;         /* format of hardware address   */
	u16     ar_pro;         /* format of protocol address   */
	u8      ar_hln;         /* length of hardware address   */
	u8      ar_pln;         /* length of protocol address   */
	u16     ar_op;          /* ARP opcode (command)         */
	u8      ar_sha[6];      /* sender h/w address           */
	u8      ar_sip[4];      /* sender ip address            */
	u8      ar_tha[6];      /* target h/w address           */
	u8      ar_tip[4];      /* target ip address            */
};


/*********************************************/
/*              IP Protocal                  */
/*********************************************/
#ifndef INADDR_ANY
#define INADDR_ANY      (0xffffffffUL)
#endif

struct sin {
	u32     sin_addr;
	u16     sin_port;
};

struct iphdr {
#ifdef BIG_ENDIAN
	u8      ip_ver:4;
	u8      ip_ihl:4;
#else
	u8      ip_ihl:4;
	u8      ip_ver:4;
#endif
	u8      ip_tos;
	u16     ip_len;
	u16     ip_id;
	u16     ip_frag;
	u8      ip_ttl;
	u8      ip_proto;
	u16     ip_check;
	u32     ip_source;
	u32     ip_dest;
};


/*********************************************/
/*            UDP protocol header            */
/*********************************************/
struct udphdr {
	u16     udp_source;
	u16     udp_dest;
	u16     udp_length;
	u16     udp_check;
};

/*********************************************/
/*        BOOTP protocol header              */
/*********************************************/
struct bootp_pkt {              /* BOOTP packet format */
	u8 		op;                 /* 1=request, 2=reply */
	u8 		htype;              /* HW address type */
	u8 		hlen;               /* HW address length */
	u8 		hops;               /* Used only by gateways */
	u32 	xid;                /* Transaction ID */
	u16 	secs;               /* Seconds since we started */
	u16 	flags;              /* Just what it says */
	u32 	client_ip;          /* Client's IP address if known */
	u32 	your_ip;            /* Assigned IP address */
	u32 	server_ip;          /* Server's IP address */
	u32 	relay_ip;           /* IP address of BOOTP relay */
	u8 		hw_addr[16];        /* Client's HW address */
	u8 		serv_name[64];      /* Server host name */
	u8 		boot_file[128];     /* Name of boot file */
	u8 		vendor_area[128];   /* Area for extensions */
};


/*********************************************/
/*              TFTP PROTOCOL                */
/*********************************************/
#define CONF_TIMEOUT_MINOR_BASE 10
#define CONF_TIMEOUT_MAJOR_BASE 500
#define CONF_TIMEOUT_MULT       5/4
#define CONF_TIMEOUT_MAX        1500
#define CONF_RETRIES            10

/* TFTP packet opcode(2bytes) */ 
#define TFTP_RRQ                1    /* Read Request */
#define TFTP_WRQ                2    /* Write Request */
#define TFTP_DATA               3    /* Data */
#define TFTP_ACK                4    /* Acknowledgment */
#define TFTP_ERROR              5    /* TFTP Error */

#define TFTP_STATE_RRQ          0
#define TFTP_STATE_ACK          1
#define TFTP_STATE_COMPLETE     2

/* TFTP error code (2bytes) */
#define TFTP_ERR_UNDEF          0   /* Not defined, */
#define TFTP_ERR_NOFILE         1   /* File not found */
#define TFTP_ERR_ACCESS         2   /* Access violation */
#define TFTP_ERR_NOSPACE        3   /* Disk full or allocation exceeded */
#define TFTP_ERR_BADOP          4   /* Illegal TFTP operation */
#define TFTP_ERR_BADID          5   /* Unknown port number */
#define TFTP_ERR_FILE           6   /* File already exists */
#define TFTP_ERR_NOUSER         7   /* No such user */

/* Define data structure for TFTP packet format */
struct tftp_rrq {
	u16     cmd;
	u8      filename[100];
};

struct tftp_ack {
	u16     cmd;
	u16     block;
};

struct tftp_data {
	u16     cmd;
	u16     block;
	u8      data[512];
};


/**************************************************/
/* Define structure for network device operations */
/**************************************************/

struct netdev {
	/* ethernet transfer functions */
	struct 	buflist *(*eth_header)(struct netdev *nd, u8 *dest, u16 proto, struct buflist *blp);
	int		(*eth_send)(struct netdev *nd, struct buflist *blp);
	int		(*eth_recv)(struct netdev *nd, u16 proto, u8 *buf);

	char *name;

	/* ethernet driver's functions */
	int             (*open)(struct netdev *);
	int             (*close)(struct netdev *);
	//int             (*status)(struct netdev *);
	//int             (*set_media)(struct netdev *, media_t media);
	//int             (*check_media)(struct netdev *);
	int             (*send)(struct netdev *, void *buffer, int size);
	int             (*recv)(struct netdev *, void *buf);

	u32             base_addr;
	u8              hw_addr[6];
	u8              hw_broadcast[6];
	u8              hw_addr_len;
	u8              boot_file[128];
	u32             ip_addr;
	u32             serv_ip_addr;
	u32             default_gw;
	media_t         media;
	int             up:1;
	u8              tha_addr[6];

	struct netdev   *next;
};


/*
 *	Network device statistics. Akin to the 2.0 ether stats but
 *	with byte counters.
 */
 
struct net_device_stats
{
	unsigned long	rx_packets;		/* total packets received	*/
	unsigned long	tx_packets;		/* total packets transmitted	*/
	unsigned long	rx_bytes;		/* total bytes received 	*/
	unsigned long	tx_bytes;		/* total bytes transmitted	*/
	unsigned long	rx_errors;		/* bad packets received		*/
	unsigned long	tx_errors;		/* packet transmit problems	*/
	unsigned long	rx_dropped;		/* no space in linux buffers	*/
	unsigned long	tx_dropped;		/* no space available in linux	*/
	unsigned long	multicast;		/* multicast packets received	*/
	unsigned long	collisions;

	/* detailed rx_errors: */
	unsigned long	rx_length_errors;
	unsigned long	rx_over_errors;		/* receiver ring buff overflow	*/
	unsigned long	rx_crc_errors;		/* recved pkt with crc error	*/
	unsigned long	rx_frame_errors;	/* recv'd frame alignment error */
	unsigned long	rx_fifo_errors;		/* recv'r fifo overrun		*/
	unsigned long	rx_missed_errors;	/* receiver missed packet	*/

	/* detailed tx_errors */
	unsigned long	tx_aborted_errors;
	unsigned long	tx_carrier_errors;
	unsigned long	tx_fifo_errors;
	unsigned long	tx_heartbeat_errors;
	unsigned long	tx_window_errors;
	
	/* for cslip etc */
	unsigned long	rx_compressed;
	unsigned long	tx_compressed;
};


/* Define network device probe function */
struct probe_dev
{
	int (*probe)(struct netdev *dev);
	int status; 						/* non-zero if autoprobe has failed */
};

extern char *in_ntoa(u32 addr);
extern unsigned int in_aton(char *s);

#endif  /* End of _BIOS_NETDEV_H */