net.h

bootloader源代码

/*****************************************
 Copyright (c) 2001-2002 
 Sigma Designs, Inc. All Rights Reserved
 Proprietary and Confidential
 *****************************************/

/* This file is part of the Jasper DVD boot loader */

/*
 * net.h
 *
 * network layer 
 *
 * first revision by Ho Lee 11/06/2002
 */

#ifndef __BOOT_LOADER_NET_H
#define __BOOT_LOADER_NET_H

struct ethhdr;
struct arprequest;
struct iphdr;
struct icmphdr;
struct udphdr;
struct bootphdr;
struct tftphdr;

struct sk_buff {
	unsigned char *data;
	unsigned int len;
	unsigned int buflen;
	int valid;

	// after packet parsing
	struct ethhdr *eth;
	unsigned char *ethdata;
	int ethdata_len;

	struct arprequest *arp;
	struct iphdr *ip;
	unsigned char *ipdata;
	int ipdata_len;

	struct icmphdr *icmp;
	struct udphdr *udp;
	unsigned char *udpdata;
	int udpdata_len;

	struct bootphdr *bootp;
	struct tftphdr *tftp;
};

enum { ETHIRQ_RX = 0x01, ETHIRQ_TX = 0x02 };
enum { NETDEV_NODEV, NETDEV_DOWN, NETDEV_UP };

#define MACADDR_LEN				6

struct net_device {
	int state;
	void *priv;
	int (*init)(struct net_device *dev);
	int (*open)(struct net_device *dev);
	int (*close)(struct net_device *dev);
	int (*irq_pending)(struct net_device *dev);
	int (*send_packet)(struct sk_buff *skbuff, struct net_device *dev);
	int (*receive_packet)(struct net_device *dev);
	void (*print_status)(struct net_device *dev);
	unsigned char dev_addr[MACADDR_LEN];

	// EEPROM
	int eeprom_size;
	unsigned short (*eeprom_readw)(struct net_device *dev, int reg);
	void (*eeprom_writew)(struct net_device *dev, int reg, int data);
};

extern struct net_device g_netdev;

//
// function prototypes
//

int net_init(void);
int net_found(void);
int net_arp_setup(void);
int net_dev_up(void);
int net_dev_down(void);
int net_rx_ready(void);
struct sk_buff *net_getpacket(int timeout);
int net_sendpacket(struct sk_buff *skb);
void net_device_status(void);

struct sk_buff *skb_alloc(int len);
void skb_free(struct sk_buff *skb);
void skb_dealloc(struct sk_buff *skb);
void skb_put(struct sk_buff *skb);
struct sk_buff *skb_get(void);

#endif