Initial revision

1 files changed, 358 insertions, 0 deletions

diff --git a/include/net.h b/include/net.h
new file mode 100644
index 0000000..d4985ca
--- /dev/null
+++ b/include/net.h
@@ -0,0 +1,358 @@
+/*
+ *	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_NET_MULTI) && defined(CONFIG_8xx)
+#include <commproc.h>
+#if defined(FEC_ENET) || defined(SCC_ENET)
+#define CONFIG_NET_MULTI
+#endif
+#endif
+#include <asm/byteorder.h>	/* for nton* / ntoh* stuff */
+
+
+/*
+ *	The number of receive packet buffers, and the required packet buffer
+ *	alignment in memory.
+ *
+ */
+
+#define PKTBUFSRX	4
+#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);
+
+#ifdef CONFIG_NET_MULTI
+
+#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		*/
+#endif
+
+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_REDIRECT		5	/* Redirect (change route)	*/
+
+/* 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 } proto_t;
+
+/* from net/net.c */
+extern char	BootFile[128];			/* Boot File name		*/
+
+/* 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);
+
+/* 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);
+
+/* 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__ */