[people/ms/u-boot.git] / include / net.h

/*
 *	LiMon Monitor (LiMon) - Network.
 *
 *	Copyright 1994 - 2000 Neil Russell.
 *	(See License)
 *
 *
 * History
 *	9/16/00	  bor  adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
 */

#ifndef __NET_H__
#define __NET_H__

#if defined(CONFIG_8xx)
#include <commproc.h>
# if !defined(CONFIG_NET_MULTI)
#  if defined(FEC_ENET) || defined(SCC_ENET)
#   define CONFIG_NET_MULTI
#  endif
# endif
#endif	/* CONFIG_8xx */

#if !defined(CONFIG_NET_MULTI) && defined(CONFIG_8260)
#include <config.h>
#if defined(CONFIG_ETHER_ON_FCC)
#if defined(CONFIG_ETHER_ON_SCC)
#error "Ethernet not correctly defined"
#endif /* CONFIG_ETHER_ON_SCC */
#define CONFIG_NET_MULTI
#if (CONFIG_ETHER_INDEX == 1)
#define	CONFIG_ETHER_ON_FCC1
# define CFG_CMXFCR_MASK1	CFG_CMXFCR_MASK
# define CFG_CMXFCR_VALUE1	CFG_CMXFCR_VALUE
#elif (CONFIG_ETHER_INDEX == 2)
#define	CONFIG_ETHER_ON_FCC2
# define CFG_CMXFCR_MASK2	CFG_CMXFCR_MASK
# define CFG_CMXFCR_VALUE2	CFG_CMXFCR_VALUE
#elif (CONFIG_ETHER_INDEX == 3)
#define	CONFIG_ETHER_ON_FCC3
# define CFG_CMXFCR_MASK3	CFG_CMXFCR_MASK
# define CFG_CMXFCR_VALUE3	CFG_CMXFCR_VALUE
#endif /* CONFIG_ETHER_INDEX */
#endif /* CONFIG_ETHER_ON_FCC */
#endif /* !CONFIG_NET_MULTI && CONFIG_8260 */

#include <asm/byteorder.h>	/* for nton* / ntoh* stuff */


/*
 *	The number of receive packet buffers, and the required packet buffer
 *	alignment in memory.
 *
 */

#ifdef CFG_RX_ETH_BUFFER
# define PKTBUFSRX	CFG_RX_ETH_BUFFER
#else
# define PKTBUFSRX	4
#endif

#define PKTALIGN	32

typedef ulong		IPaddr_t;


/*
 * The current receive packet handler.  Called with a pointer to the
 * application packet, and a protocol type (PORT_BOOTPC or PORT_TFTP).
 * All other packets are dealt with without calling the handler.
 */
typedef void	rxhand_f(uchar *, unsigned, unsigned, unsigned);

/*
 *	A timeout handler.  Called after time interval has expired.
 */
typedef void	thand_f(void);

#define NAMESIZE 16

enum eth_state_t {
	ETH_STATE_INIT,
	ETH_STATE_PASSIVE,
	ETH_STATE_ACTIVE
};

struct eth_device {
	char name[NAMESIZE];
	unsigned char enetaddr[6];
	int iobase;
	int state;

	int  (*init) (struct eth_device*, bd_t*);
	int  (*send) (struct eth_device*, volatile void* pachet, int length);
	int  (*recv) (struct eth_device*);
	void (*halt) (struct eth_device*);

	struct eth_device *next;
	void *priv;
};

extern int eth_initialize(bd_t *bis);		/* Initialize network subsystem */
extern int eth_register(struct eth_device* dev);/* Register network device	*/
extern void eth_try_another(int first_restart);	/* Change the device		*/
extern struct eth_device *eth_get_dev(void);	/* get the current device MAC	*/
extern void eth_set_enetaddr(int num, char* a);	/* Set new MAC address		*/

extern int eth_init(bd_t *bis);			/* Initialize the device	*/
extern int eth_send(volatile void *packet, int length);	   /* Send a packet	*/
extern int eth_rx(void);			/* Check for received packets	*/
extern void eth_halt(void);			/* stop SCC			*/


/**********************************************************************/
/*
 *	Protocol headers.
 */

/*
 *	Ethernet header
 */
typedef struct {
	uchar		et_dest[6];	/* Destination node		*/
	uchar		et_src[6];	/* Source node			*/
	ushort		et_protlen;	/* Protocol or length		*/
	uchar		et_dsap;	/* 802 DSAP			*/
	uchar		et_ssap;	/* 802 SSAP			*/
	uchar		et_ctl;		/* 802 control			*/
	uchar		et_snap1;	/* SNAP				*/
	uchar		et_snap2;
	uchar		et_snap3;
	ushort		et_prot;	/* 802 protocol			*/
} Ethernet_t;

#define ETHER_HDR_SIZE	14		/* Ethernet header size		*/
#define E802_HDR_SIZE	22		/* 802 ethernet header size	*/
#define PROT_IP		0x0800		/* IP protocol			*/
#define PROT_ARP	0x0806		/* IP ARP protocol		*/
#define PROT_RARP	0x8035		/* IP ARP protocol		*/

#define IPPROTO_ICMP	 1	/* Internet Control Message Protocol	*/
#define IPPROTO_UDP	17	/* User Datagram Protocol		*/

/*
 *	Internet Protocol (IP) header.
 */
typedef struct {
	uchar		ip_hl_v;	/* header length and version	*/
	uchar		ip_tos;		/* type of service		*/
	ushort		ip_len;		/* total length			*/
	ushort		ip_id;		/* identification		*/
	ushort		ip_off;		/* fragment offset field	*/
	uchar		ip_ttl;		/* time to live			*/
	uchar		ip_p;		/* protocol			*/
	ushort		ip_sum;		/* checksum			*/
	IPaddr_t	ip_src;		/* Source IP address		*/
	IPaddr_t	ip_dst;		/* Destination IP address	*/
	ushort		udp_src;	/* UDP source port		*/
	ushort		udp_dst;	/* UDP destination port		*/
	ushort		udp_len;	/* Length of UDP packet		*/
	ushort		udp_xsum;	/* Checksum			*/
} IP_t;

#define IP_HDR_SIZE_NO_UDP	(sizeof (IP_t) - 8)
#define IP_HDR_SIZE		(sizeof (IP_t))


/*
 *	Address Resolution Protocol (ARP) header.
 */
typedef struct
{
	ushort		ar_hrd;		/* Format of hardware address	*/
#   define ARP_ETHER	    1		/* Ethernet  hardware address	*/
	ushort		ar_pro;		/* Format of protocol address	*/
	uchar		ar_hln;		/* Length of hardware address	*/
	uchar		ar_pln;		/* Length of protocol address	*/
	ushort		ar_op;		/* Operation			*/
#   define ARPOP_REQUEST    1		/* Request  to resolve  address	*/
#   define ARPOP_REPLY	    2		/* Response to previous request	*/

#   define RARPOP_REQUEST   3		/* Request  to resolve  address	*/
#   define RARPOP_REPLY	    4		/* Response to previous request */

	/*
	 * The remaining fields are variable in size, according to
	 * the sizes above, and are defined as appropriate for
	 * specific hardware/protocol combinations.
	 */
	uchar		ar_data[0];
#if 0
	uchar		ar_sha[];	/* Sender hardware address	*/
	uchar		ar_spa[];	/* Sender protocol address	*/
	uchar		ar_tha[];	/* Target hardware address	*/
	uchar		ar_tpa[];	/* Target protocol address	*/
#endif /* 0 */
} ARP_t;

#define ARP_HDR_SIZE	(8+20)		/* Size assuming ethernet	*/

/*
 * ICMP stuff (just enough to handle (host) redirect messages)
 */
#define ICMP_ECHO_REPLY		0	/* Echo reply 			*/
#define ICMP_REDIRECT		5	/* Redirect (change route)	*/
#define ICMP_ECHO_REQUEST	8	/* Echo request			*/

/* Codes for REDIRECT. */
#define ICMP_REDIR_NET		0	/* Redirect Net			*/
#define ICMP_REDIR_HOST		1	/* Redirect Host		*/

typedef struct icmphdr {
	uchar		type;
	uchar		code;
	ushort		checksum;
	union {
		struct {
			ushort	id;
			ushort	sequence;
		} echo;
		ulong	gateway;
		struct {
			ushort	__unused;
			ushort	mtu;
		} frag;
	} un;
} ICMP_t;


/*
 * Maximum packet size; used to allocate packet storage.
 * TFTP packets can be 524 bytes + IP header + ethernet header.
 * Lets be conservative, and go for 38 * 16.  (Must also be
 * a multiple of 32 bytes).
 */
/*
 * AS.HARNOIS : Better to set PKTSIZE to maximum size because
 * traffic type is not always controlled
 * maximum packet size =  1518
 * maximum packet size and multiple of 32 bytes =  1536
 */
#define PKTSIZE			1518
#define PKTSIZE_ALIGN		1536
/*#define PKTSIZE		608*/

/*
 * Maximum receive ring size; that is, the number of packets
 * we can buffer before overflow happens. Basically, this just
 * needs to be enough to prevent a packet being discarded while
 * we are processing the previous one.
 */
#define RINGSZ		4
#define RINGSZ_LOG2	2

/**********************************************************************/
/*
 *	Globals.
 *
 * Note:
 *
 * All variables of type IPaddr_t are stored in NETWORK byte order
 * (big endian).
 */

/* net.c */
/** BOOTP EXTENTIONS **/
extern IPaddr_t		NetOurGatewayIP;	/* Our gateway IP addresse	*/
extern IPaddr_t		NetOurSubnetMask;	/* Our subnet mask (0 = unknown)*/
extern IPaddr_t		NetOurDNSIP;	 /* Our Domain Name Server (0 = unknown)*/
extern char		NetOurNISDomain[32];	/* Our NIS domain		*/
extern char		NetOurHostName[32];	/* Our hostname			*/
extern char		NetOurRootPath[64];	/* Our root path		*/
extern ushort		NetBootFileSize;	/* Our boot file size in blocks	*/
/** END OF BOOTP EXTENTIONS **/
extern ulong		NetBootFileXferSize;	/* size of bootfile in bytes	*/
extern uchar		NetOurEther[6];		/* Our ethernet address		*/
extern uchar		NetServerEther[6];	/* Boot server enet address	*/
extern IPaddr_t		NetOurIP;		/* Our    IP addr (0 = unknown)	*/
extern IPaddr_t		NetServerIP;		/* Server IP addr (0 = unknown)	*/
extern volatile uchar * NetTxPacket;		/* THE transmit packet		*/
extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets		*/
extern volatile uchar * NetRxPkt;		/* Current receive packet	*/
extern int		NetRxPktLen;		/* Current rx packet length	*/
extern unsigned		NetIPID;		/* IP ID (counting)		*/
extern uchar		NetBcastAddr[6];	/* Ethernet boardcast address	*/

extern int		NetState;		/* Network loop state		*/
#define NETLOOP_CONTINUE	1
#define NETLOOP_RESTART		2
#define NETLOOP_SUCCESS		3
#define NETLOOP_FAIL		4

#ifdef CONFIG_NET_MULTI
extern int		NetRestartWrap;		/* Tried all network devices	*/
#endif

typedef enum { BOOTP, RARP, ARP, TFTP, DHCP, PING, DNS } proto_t;

/* from net/net.c */
extern char	BootFile[128];			/* Boot File name		*/

#if (CONFIG_COMMANDS & CFG_CMD_PING)
extern IPaddr_t	NetPingIP;			/* the ip address to ping 		*/
#endif

/* Initialize the network adapter */
extern int	NetLoop(proto_t);

/* Shutdown adapters and cleanup */
extern void	NetStop(void);

/* Load failed.	 Start again. */
extern void	NetStartAgain(void);

/* Set ethernet header */
extern void	NetSetEther(volatile uchar *, uchar *, uint);

/* Set IP header */
extern void	NetSetIP(volatile uchar *, IPaddr_t, int, int, int);

/* Checksum */
extern int	NetCksumOk(uchar *, int);	/* Return true if cksum OK	*/
extern uint	NetCksum(uchar *, int);		/* Calculate the checksum	*/

/* Set callbacks */
extern void	NetSetHandler(rxhand_f *);	/* Set RX packet handler	*/
extern void	NetSetTimeout(int, thand_f *);	/* Set timeout handler		*/

/* Transmit "NetTxPacket" */
extern void	NetSendPacket(volatile uchar *, int);

/* Transmit UDP packet, performing ARP request if needed */
extern int	NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len);

/* Processes a received packet */
extern void	NetReceive(volatile uchar *, int);

/* Print an IP address on the console */
extern void	print_IPaddr (IPaddr_t);

/*
 * The following functions are a bit ugly, but necessary to deal with
 * alignment restrictions on ARM.
 *
 * We're using inline functions, which had the smallest memory
 * footprint in our tests.
 */
/* return IP *in network byteorder* */
static inline IPaddr_t NetReadIP(void *from)
{
	IPaddr_t ip;
	memcpy((void*)&ip, from, sizeof(ip));
	return ip;
}

/* return ulong *in network byteorder* */
static inline ulong NetReadLong(ulong *from)
{
	ulong l;
	memcpy((void*)&l, (void*)from, sizeof(l));
	return l;
}

/* write IP *in network byteorder* */
static inline void NetWriteIP(void *to, IPaddr_t ip)
{
	memcpy(to, (void*)&ip, sizeof(ip));
}

/* copy IP */
static inline void NetCopyIP(void *to, void *from)
{
	memcpy(to, from, sizeof(IPaddr_t));
}

/* copy ulong */
static inline void NetCopyLong(ulong *to, ulong *from)
{
	memcpy((void*)to, (void*)from, sizeof(ulong));
}

/* Convert an IP address to a string */
extern void	ip_to_string (IPaddr_t x, char *s);

/* Convert a string to ip address */
extern IPaddr_t string_to_ip(char *s);

/* read an IP address from a environment variable */
extern IPaddr_t getenv_IPaddr (char *);

/* copy a filename (allow for "..." notation, limit length) */
extern void	copy_filename (uchar *dst, uchar *src, int size);

/**********************************************************************/

#endif /* __NET_H__ */
Commit	Line	Data
2d966958 WD	1	/*
	2	* LiMon Monitor (LiMon) - Network.
	3	*
	4	* Copyright 1994 - 2000 Neil Russell.
	5	* (See License)
	6	*
	7	*
	8	* History
	9	* 9/16/00 bor adapted to TQM823L/STK8xxL board, RARP/TFTP boot added
	10	*/
	11
	12	#ifndef __NET_H__
	13	#define __NET_H__
	14
71f95118	15	#if defined(CONFIG_8xx)
2d966958	16	#include <commproc.h>
71f95118 WD	17	# if !defined(CONFIG_NET_MULTI)
	18	# if defined(FEC_ENET) \|\| defined(SCC_ENET)
	19	# define CONFIG_NET_MULTI
	20	# endif
	21	# endif
	22	#endif /* CONFIG_8xx */
aacf9a49 WD	23
	24	#if !defined(CONFIG_NET_MULTI) && defined(CONFIG_8260)
	25	#include <config.h>
	26	#if defined(CONFIG_ETHER_ON_FCC)
	27	#if defined(CONFIG_ETHER_ON_SCC)
	28	#error "Ethernet not correctly defined"
	29	#endif /* CONFIG_ETHER_ON_SCC */
	30	#define CONFIG_NET_MULTI
	31	#if (CONFIG_ETHER_INDEX == 1)
	32	#define CONFIG_ETHER_ON_FCC1
	33	# define CFG_CMXFCR_MASK1 CFG_CMXFCR_MASK
	34	# define CFG_CMXFCR_VALUE1 CFG_CMXFCR_VALUE
	35	#elif (CONFIG_ETHER_INDEX == 2)
	36	#define CONFIG_ETHER_ON_FCC2
	37	# define CFG_CMXFCR_MASK2 CFG_CMXFCR_MASK
	38	# define CFG_CMXFCR_VALUE2 CFG_CMXFCR_VALUE
	39	#elif (CONFIG_ETHER_INDEX == 3)
	40	#define CONFIG_ETHER_ON_FCC3
	41	# define CFG_CMXFCR_MASK3 CFG_CMXFCR_MASK
	42	# define CFG_CMXFCR_VALUE3 CFG_CMXFCR_VALUE
	43	#endif /* CONFIG_ETHER_INDEX */
	44	#endif /* CONFIG_ETHER_ON_FCC */
	45	#endif /* !CONFIG_NET_MULTI && CONFIG_8260 */
	46
2d966958 WD	47	#include <asm/byteorder.h> /* for nton* / ntoh* stuff */
	48
	49
	50	/*
	51	* The number of receive packet buffers, and the required packet buffer
	52	* alignment in memory.
	53	*
	54	*/
	55
c6028835 SR	56	#ifdef CFG_RX_ETH_BUFFER
c6028835 SR	57	# define PKTBUFSRX CFG_RX_ETH_BUFFER
1d0350ed	58	#else
c6028835	59	# define PKTBUFSRX 4
1d0350ed WD	60	#endif
1d0350ed WD	61
2d966958 WD	62	#define PKTALIGN 32
	63
	64	typedef ulong IPaddr_t;
	65
	66
2d966958 WD	67	/*
	68	* The current receive packet handler. Called with a pointer to the
	69	* application packet, and a protocol type (PORT_BOOTPC or PORT_TFTP).
	70	* All other packets are dealt with without calling the handler.
	71	*/
	72	typedef void rxhand_f(uchar *, unsigned, unsigned, unsigned);
	73
	74	/*
	75	* A timeout handler. Called after time interval has expired.
	76	*/
	77	typedef void thand_f(void);
	78
2d966958 WD	79	#define NAMESIZE 16
	80
	81	enum eth_state_t {
	82	ETH_STATE_INIT,
	83	ETH_STATE_PASSIVE,
	84	ETH_STATE_ACTIVE
	85	};
	86
	87	struct eth_device {
	88	char name[NAMESIZE];
	89	unsigned char enetaddr[6];
	90	int iobase;
	91	int state;
	92
	93	int (init) (struct eth_device, bd_t*);
	94	int (send) (struct eth_device, volatile void* pachet, int length);
	95	int (recv) (struct eth_device);
	96	void (halt) (struct eth_device);
	97
	98	struct eth_device *next;
	99	void *priv;
	100	};
	101
	102	extern int eth_initialize(bd_t bis); / Initialize network subsystem */
	103	extern int eth_register(struct eth_device* dev);/* Register network device */
	104	extern void eth_try_another(int first_restart); /* Change the device */
	105	extern struct eth_device eth_get_dev(void); / get the current device MAC */
	106	extern void eth_set_enetaddr(int num, char* a); /* Set new MAC address */
2d966958 WD	107
	108	extern int eth_init(bd_t bis); / Initialize the device */
	109	extern int eth_send(volatile void packet, int length); / Send a packet */
	110	extern int eth_rx(void); /* Check for received packets */
	111	extern void eth_halt(void); /* stop SCC */
	112
	113
	114	/**********************************************************************/
	115	/*
	116	* Protocol headers.
	117	*/
	118
	119	/*
	120	* Ethernet header
	121	*/
	122	typedef struct {
	123	uchar et_dest[6]; /* Destination node */
	124	uchar et_src[6]; /* Source node */
	125	ushort et_protlen; /* Protocol or length */
	126	uchar et_dsap; /* 802 DSAP */
	127	uchar et_ssap; /* 802 SSAP */
	128	uchar et_ctl; /* 802 control */
	129	uchar et_snap1; /* SNAP */
	130	uchar et_snap2;
	131	uchar et_snap3;
	132	ushort et_prot; /* 802 protocol */
	133	} Ethernet_t;
	134
	135	#define ETHER_HDR_SIZE 14 /* Ethernet header size */
	136	#define E802_HDR_SIZE 22 /* 802 ethernet header size */
	137	#define PROT_IP 0x0800 /* IP protocol */
	138	#define PROT_ARP 0x0806 /* IP ARP protocol */
	139	#define PROT_RARP 0x8035 /* IP ARP protocol */
	140
	141	#define IPPROTO_ICMP 1 /* Internet Control Message Protocol */
	142	#define IPPROTO_UDP 17 /* User Datagram Protocol */
	143
	144	/*
	145	* Internet Protocol (IP) header.
	146	*/
	147	typedef struct {
	148	uchar ip_hl_v; /* header length and version */
	149	uchar ip_tos; /* type of service */
	150	ushort ip_len; /* total length */
	151	ushort ip_id; /* identification */
	152	ushort ip_off; /* fragment offset field */
	153	uchar ip_ttl; /* time to live */
	154	uchar ip_p; /* protocol */
	155	ushort ip_sum; /* checksum */
	156	IPaddr_t ip_src; /* Source IP address */
	157	IPaddr_t ip_dst; /* Destination IP address */
	158	ushort udp_src; /* UDP source port */
	159	ushort udp_dst; /* UDP destination port */
	160	ushort udp_len; /* Length of UDP packet */
	161	ushort udp_xsum; /* Checksum */
	162	} IP_t;
	163
	164	#define IP_HDR_SIZE_NO_UDP (sizeof (IP_t) - 8)
	165	#define IP_HDR_SIZE (sizeof (IP_t))
	166
	167
	168	/*
	169	* Address Resolution Protocol (ARP) header.
	170	*/
171	typedef struct
172	{
173	ushort ar_hrd; /* Format of hardware address */
174	# define ARP_ETHER 1 /* Ethernet hardware address */
175	ushort ar_pro; /* Format of protocol address */
176	uchar ar_hln; /* Length of hardware address */
177	uchar ar_pln; /* Length of protocol address */
178	ushort ar_op; /* Operation */
179	# define ARPOP_REQUEST 1 /* Request to resolve address */
180	# define ARPOP_REPLY 2 /* Response to previous request */
181
182	# define RARPOP_REQUEST 3 /* Request to resolve address */
183	# define RARPOP_REPLY 4 /* Response to previous request */
184
185	/*
8bde7f77 WD	186	* The remaining fields are variable in size, according to
	187	* the sizes above, and are defined as appropriate for
	188	* specific hardware/protocol combinations.
2d966958 WD	189	*/
	190	uchar ar_data[0];
	191	#if 0
	192	uchar ar_sha[]; /* Sender hardware address */
	193	uchar ar_spa[]; /* Sender protocol address */
	194	uchar ar_tha[]; /* Target hardware address */
	195	uchar ar_tpa[]; /* Target protocol address */
	196	#endif /* 0 */
	197	} ARP_t;
	198
	199	#define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */
	200
	201	/*
	202	* ICMP stuff (just enough to handle (host) redirect messages)
	203	*/
73a8b27c	204	#define ICMP_ECHO_REPLY 0 /* Echo reply */
2d966958	205	#define ICMP_REDIRECT 5 /* Redirect (change route) */
73a8b27c	206	#define ICMP_ECHO_REQUEST 8 /* Echo request */
2d966958 WD	207
	208	/* Codes for REDIRECT. */
	209	#define ICMP_REDIR_NET 0 /* Redirect Net */
	210	#define ICMP_REDIR_HOST 1 /* Redirect Host */
	211
	212	typedef struct icmphdr {
	213	uchar type;
	214	uchar code;
	215	ushort checksum;
	216	union {
	217	struct {
	218	ushort id;
	219	ushort sequence;
	220	} echo;
	221	ulong gateway;
	222	struct {
	223	ushort __unused;
	224	ushort mtu;
	225	} frag;
	226	} un;
	227	} ICMP_t;
	228
	229
2d966958 WD	230	/*
	231	* Maximum packet size; used to allocate packet storage.
	232	* TFTP packets can be 524 bytes + IP header + ethernet header.
	233	* Lets be conservative, and go for 38 * 16. (Must also be
	234	* a multiple of 32 bytes).
	235	*/
	236	/*
	237	* AS.HARNOIS : Better to set PKTSIZE to maximum size because
	238	* traffic type is not always controlled
	239	* maximum packet size = 1518
	240	* maximum packet size and multiple of 32 bytes = 1536
	241	*/
	242	#define PKTSIZE 1518
	243	#define PKTSIZE_ALIGN 1536
	244	/#define PKTSIZE 608/
	245
	246	/*
	247	* Maximum receive ring size; that is, the number of packets
	248	* we can buffer before overflow happens. Basically, this just
	249	* needs to be enough to prevent a packet being discarded while
	250	* we are processing the previous one.
	251	*/
	252	#define RINGSZ 4
	253	#define RINGSZ_LOG2 2
	254
	255	/**********************************************************************/
	256	/*
	257	* Globals.
	258	*
	259	* Note:
	260	*
	261	* All variables of type IPaddr_t are stored in NETWORK byte order
	262	* (big endian).
	263	*/
	264
	265	/* net.c */
	266	/ BOOTP EXTENTIONS /
	267	extern IPaddr_t NetOurGatewayIP; /* Our gateway IP addresse */
	268	extern IPaddr_t NetOurSubnetMask; /* Our subnet mask (0 = unknown)*/
	269	extern IPaddr_t NetOurDNSIP; /* Our Domain Name Server (0 = unknown)*/
	270	extern char NetOurNISDomain[32]; /* Our NIS domain */
	271	extern char NetOurHostName[32]; /* Our hostname */
	272	extern char NetOurRootPath[64]; /* Our root path */
	273	extern ushort NetBootFileSize; /* Our boot file size in blocks */
	274	/ END OF BOOTP EXTENTIONS /
	275	extern ulong NetBootFileXferSize; /* size of bootfile in bytes */
	276	extern uchar NetOurEther[6]; /* Our ethernet address */
	277	extern uchar NetServerEther[6]; /* Boot server enet address */
	278	extern IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
	279	extern IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
	280	extern volatile uchar * NetTxPacket; /* THE transmit packet */
	281	extern volatile uchar * NetRxPackets[PKTBUFSRX];/* Receive packets */
	282	extern volatile uchar * NetRxPkt; /* Current receive packet */
	283	extern int NetRxPktLen; /* Current rx packet length */
	284	extern unsigned NetIPID; /* IP ID (counting) */
	285	extern uchar NetBcastAddr[6]; /* Ethernet boardcast address */
	286
	287	extern int NetState; /* Network loop state */
	288	#define NETLOOP_CONTINUE 1
	289	#define NETLOOP_RESTART 2
	290	#define NETLOOP_SUCCESS 3
	291	#define NETLOOP_FAIL 4
	292
	293	#ifdef CONFIG_NET_MULTI
294	extern int NetRestartWrap; /* Tried all network devices */
295	#endif
296
73a8b27c	297	typedef enum { BOOTP, RARP, ARP, TFTP, DHCP, PING, DNS } proto_t;
2d966958 WD	298
	299	/* from net/net.c */
	300	extern char BootFile[128]; /* Boot File name */
	301
73a8b27c WD	302	#if (CONFIG_COMMANDS & CFG_CMD_PING)
	303	extern IPaddr_t NetPingIP; /* the ip address to ping */
	304	#endif
	305
2d966958 WD	306	/* Initialize the network adapter */
	307	extern int NetLoop(proto_t);
	308
	309	/* Shutdown adapters and cleanup */
	310	extern void NetStop(void);
	311
	312	/* Load failed. Start again. */
	313	extern void NetStartAgain(void);
	314
	315	/* Set ethernet header */
	316	extern void NetSetEther(volatile uchar , uchar , uint);
	317
	318	/* Set IP header */
	319	extern void NetSetIP(volatile uchar *, IPaddr_t, int, int, int);
	320
	321	/* Checksum */
	322	extern int NetCksumOk(uchar , int); / Return true if cksum OK */
	323	extern uint NetCksum(uchar , int); / Calculate the checksum */
	324
	325	/* Set callbacks */
	326	extern void NetSetHandler(rxhand_f ); / Set RX packet handler */
	327	extern void NetSetTimeout(int, thand_f ); / Set timeout handler */
	328
	329	/* Transmit "NetTxPacket" */
	330	extern void NetSendPacket(volatile uchar *, int);
	331
73a8b27c WD	332	/* Transmit UDP packet, performing ARP request if needed */
	333	extern int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len);
	334
2d966958 WD	335	/* Processes a received packet */
	336	extern void NetReceive(volatile uchar *, int);
	337
	338	/* Print an IP address on the console */
	339	extern void print_IPaddr (IPaddr_t);
	340
	341	/*
	342	* The following functions are a bit ugly, but necessary to deal with
	343	* alignment restrictions on ARM.
	344	*
	345	* We're using inline functions, which had the smallest memory
	346	* footprint in our tests.
	347	*/
	348	/* return IP in network byteorder */
	349	static inline IPaddr_t NetReadIP(void *from)
	350	{
	351	IPaddr_t ip;
	352	memcpy((void*)&ip, from, sizeof(ip));
	353	return ip;
	354	}
	355
	356	/* return ulong in network byteorder */
	357	static inline ulong NetReadLong(ulong *from)
	358	{
	359	ulong l;
	360	memcpy((void)&l, (void)from, sizeof(l));
	361	return l;
	362	}
	363
	364	/* write IP in network byteorder */
	365	static inline void NetWriteIP(void *to, IPaddr_t ip)
	366	{
	367	memcpy(to, (void*)&ip, sizeof(ip));
	368	}
	369
	370	/* copy IP */
	371	static inline void NetCopyIP(void to, void from)
	372	{
	373	memcpy(to, from, sizeof(IPaddr_t));
	374	}
	375
	376	/* copy ulong */
	377	static inline void NetCopyLong(ulong to, ulong from)
	378	{
	379	memcpy((void)to, (void)from, sizeof(ulong));
	380	}
	381
	382	/* Convert an IP address to a string */
	383	extern void ip_to_string (IPaddr_t x, char *s);
	384
73a8b27c WD	385	/* Convert a string to ip address */
	386	extern IPaddr_t string_to_ip(char *s);
	387
2d966958 WD	388	/* read an IP address from a environment variable */
	389	extern IPaddr_t getenv_IPaddr (char *);
	390
	391	/* copy a filename (allow for "..." notation, limit length) */
	392	extern void copy_filename (uchar dst, uchar src, int size);
	393
	394	/**********************************************************************/
	395
	396	#endif /* __NET_H__ */