[J-u-boot.git] / net / nfs.c

/*
 * NFS support driver - based on etherboot and U-BOOT's tftp.c
 *
 * Masami Komiya <[email protected]> 2004
 *
 */

/* NOTE: the NFS code is heavily inspired by the NetBSD netboot code (read:
 * large portions are copied verbatim) as distributed in OSKit 0.97.  A few
 * changes were necessary to adapt the code to Etherboot and to fix several
 * inconsistencies.  Also the RPC message preparation is done "by hand" to
 * avoid adding netsprintf() which I find hard to understand and use.  */

/* NOTE 2: Etherboot does not care about things beyond the kernel image, so
 * it loads the kernel image off the boot server (ARP_SERVER) and does not
 * access the client root disk (root-path in dhcpd.conf), which would use
 * ARP_ROOTSERVER.  The root disk is something the operating system we are
 * about to load needs to use.	This is different from the OSKit 0.97 logic.  */

/* NOTE 3: Symlink handling introduced by Anselm M Hoffmeister, 2003-July-14
 * If a symlink is encountered, it is followed as far as possible (recursion
 * possible, maximum 16 steps). There is no clearing of ".."'s inside the
 * path, so please DON'T DO THAT. thx. */

#include <common.h>
#include <command.h>
#include <net.h>
#include <malloc.h>
#include "nfs.h"
#include "bootp.h"

/*#define NFS_DEBUG*/

#if defined(CONFIG_CMD_NET) && defined(CONFIG_CMD_NFS)

#define HASHES_PER_LINE 65	/* Number of "loading" hashes per line	*/
#define NFS_RETRY_COUNT 30
#define NFS_TIMEOUT 2UL

static int fs_mounted = 0;
static unsigned long rpc_id = 0;
static int nfs_offset = -1;
static int nfs_len;

static char dirfh[NFS_FHSIZE];	/* file handle of directory */
static char filefh[NFS_FHSIZE]; /* file handle of kernel image */

static int	NfsDownloadState;
static IPaddr_t NfsServerIP;
static int	NfsSrvMountPort;
static int	NfsSrvNfsPort;
static int	NfsOurPort;
static int	NfsTimeoutCount;
static int	NfsState;
#define STATE_PRCLOOKUP_PROG_MOUNT_REQ	1
#define STATE_PRCLOOKUP_PROG_NFS_REQ	2
#define STATE_MOUNT_REQ			3
#define STATE_UMOUNT_REQ		4
#define STATE_LOOKUP_REQ		5
#define STATE_READ_REQ			6
#define STATE_READLINK_REQ		7

static char default_filename[64];
static char *nfs_filename;
static char *nfs_path;
static char nfs_path_buff[2048];

static __inline__ int
store_block (uchar * src, unsigned offset, unsigned len)
{
	ulong newsize = offset + len;
#ifdef CFG_DIRECT_FLASH_NFS
	int i, rc = 0;

	for (i=0; i<CFG_MAX_FLASH_BANKS; i++) {
		/* start address in flash? */
		if (load_addr + offset >= flash_info[i].start[0]) {
			rc = 1;
			break;
		}
	}

	if (rc) { /* Flash is destination for this packet */
		rc = flash_write ((uchar *)src, (ulong)(load_addr+offset), len);
		if (rc) {
			flash_perror (rc);
			return -1;
		}
	} else
#endif /* CFG_DIRECT_FLASH_NFS */
	{
		(void)memcpy ((void *)(load_addr + offset), src, len);
	}

	if (NetBootFileXferSize < (offset+len))
		NetBootFileXferSize = newsize;
	return 0;
}

static char*
basename (char *path)
{
	char *fname;

	fname = path + strlen(path) - 1;
	while (fname >= path) {
		if (*fname == '/') {
			fname++;
			break;
		}
		fname--;
	}
	return fname;
}

static char*
dirname (char *path)
{
	char *fname;

	fname = basename (path);
	--fname;
	*fname = '\0';
	return path;
}

/**************************************************************************
RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
**************************************************************************/
static long *rpc_add_credentials (long *p)
{
	int hl;
	int hostnamelen;
	char hostname[256];

	strcpy (hostname, "");
	hostnamelen=strlen (hostname);

	/* Here's the executive summary on authentication requirements of the
	 * various NFS server implementations:	Linux accepts both AUTH_NONE
	 * and AUTH_UNIX authentication (also accepts an empty hostname field
	 * in the AUTH_UNIX scheme).  *BSD refuses AUTH_NONE, but accepts
	 * AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX
	 * scheme).  To be safe, use AUTH_UNIX and pass the hostname if we have
	 * it (if the BOOTP/DHCP reply didn't give one, just use an empty
	 * hostname).  */

	hl = (hostnamelen + 3) & ~3;

	/* Provide an AUTH_UNIX credential.  */
	*p++ = htonl(1);		/* AUTH_UNIX */
	*p++ = htonl(hl+20);		/* auth length */
	*p++ = htonl(0);		/* stamp */
	*p++ = htonl(hostnamelen);	/* hostname string */
	if (hostnamelen & 3) {
		*(p + hostnamelen / 4) = 0; /* add zero padding */
	}
	memcpy (p, hostname, hostnamelen);
	p += hl / 4;
	*p++ = 0;			/* uid */
	*p++ = 0;			/* gid */
	*p++ = 0;			/* auxiliary gid list */

	/* Provide an AUTH_NONE verifier.  */
	*p++ = 0;			/* AUTH_NONE */
	*p++ = 0;			/* auth length */

	return p;
}

/**************************************************************************
RPC_LOOKUP - Lookup RPC Port numbers
**************************************************************************/
static void
rpc_req (int rpc_prog, int rpc_proc, uint32_t *data, int datalen)
{
	struct rpc_t pkt;
	unsigned long id;
	uint32_t *p;
	int pktlen;
	int sport;

	id = ++rpc_id;
	pkt.u.call.id = htonl(id);
	pkt.u.call.type = htonl(MSG_CALL);
	pkt.u.call.rpcvers = htonl(2);	/* use RPC version 2 */
	pkt.u.call.prog = htonl(rpc_prog);
	pkt.u.call.vers = htonl(2);	/* portmapper is version 2 */
	pkt.u.call.proc = htonl(rpc_proc);
	p = (uint32_t *)&(pkt.u.call.data);

	if (datalen)
		memcpy ((char *)p, (char *)data, datalen*sizeof(uint32_t));

	pktlen = (char *)p + datalen*sizeof(uint32_t) - (char *)&pkt;

	memcpy ((char *)NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE, (char *)&pkt, pktlen);

	if (rpc_prog == PROG_PORTMAP)
		sport = SUNRPC_PORT;
	else if (rpc_prog == PROG_MOUNT)
		sport = NfsSrvMountPort;
	else
		sport = NfsSrvNfsPort;

	NetSendUDPPacket (NetServerEther, NfsServerIP, sport, NfsOurPort, pktlen);
}

/**************************************************************************
RPC_LOOKUP - Lookup RPC Port numbers
**************************************************************************/
static void
rpc_lookup_req (int prog, int ver)
{
	uint32_t data[16];

	data[0] = 0; data[1] = 0;	/* auth credential */
	data[2] = 0; data[3] = 0;	/* auth verifier */
	data[4] = htonl(prog);
	data[5] = htonl(ver);
	data[6] = htonl(17);	/* IP_UDP */
	data[7] = 0;

	rpc_req (PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
}

/**************************************************************************
NFS_MOUNT - Mount an NFS Filesystem
**************************************************************************/
static void
nfs_mount_req (char *path)
{
	uint32_t data[1024];
	uint32_t *p;
	int len;
	int pathlen;

	pathlen = strlen (path);

	p = &(data[0]);
	p = (uint32_t *)rpc_add_credentials((long *)p);

	*p++ = htonl(pathlen);
	if (pathlen & 3) *(p + pathlen / 4) = 0;
	memcpy (p, path, pathlen);
	p += (pathlen + 3) / 4;

	len = (uint32_t *)p - (uint32_t *)&(data[0]);

	rpc_req (PROG_MOUNT, MOUNT_ADDENTRY, data, len);
}

/**************************************************************************
NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
**************************************************************************/
static void
nfs_umountall_req (void)
{
	uint32_t data[1024];
	uint32_t *p;
	int len;

	if ((NfsSrvMountPort == -1) || (!fs_mounted)) {
		/* Nothing mounted, nothing to umount */
		return;
	}

	p = &(data[0]);
	p = (uint32_t *)rpc_add_credentials ((long *)p);

	len = (uint32_t *)p - (uint32_t *)&(data[0]);

	rpc_req (PROG_MOUNT, MOUNT_UMOUNTALL, data, len);
}

/***************************************************************************
 * NFS_READLINK (AH 2003-07-14)
 * This procedure is called when read of the first block fails -
 * this probably happens when it's a directory or a symlink
 * In case of successful readlink(), the dirname is manipulated,
 * so that inside the nfs() function a recursion can be done.
 **************************************************************************/
static void
nfs_readlink_req (void)
{
	uint32_t data[1024];
	uint32_t *p;
	int len;

	p = &(data[0]);
	p = (uint32_t *)rpc_add_credentials ((long *)p);

	memcpy (p, filefh, NFS_FHSIZE);
	p += (NFS_FHSIZE / 4);

	len = (uint32_t *)p - (uint32_t *)&(data[0]);

	rpc_req (PROG_NFS, NFS_READLINK, data, len);
}

/**************************************************************************
NFS_LOOKUP - Lookup Pathname
**************************************************************************/
static void
nfs_lookup_req (char *fname)
{
	uint32_t data[1024];
	uint32_t *p;
	int len;
	int fnamelen;

	fnamelen = strlen (fname);

	p = &(data[0]);
	p = (uint32_t *)rpc_add_credentials ((long *)p);

	memcpy (p, dirfh, NFS_FHSIZE);
	p += (NFS_FHSIZE / 4);
	*p++ = htonl(fnamelen);
	if (fnamelen & 3) *(p + fnamelen / 4) = 0;
	memcpy (p, fname, fnamelen);
	p += (fnamelen + 3) / 4;

	len = (uint32_t *)p - (uint32_t *)&(data[0]);

	rpc_req (PROG_NFS, NFS_LOOKUP, data, len);
}

/**************************************************************************
NFS_READ - Read File on NFS Server
**************************************************************************/
static void
nfs_read_req (int offset, int readlen)
{
	uint32_t data[1024];
	uint32_t *p;
	int len;

	p = &(data[0]);
	p = (uint32_t *)rpc_add_credentials ((long *)p);

	memcpy (p, filefh, NFS_FHSIZE);
	p += (NFS_FHSIZE / 4);
	*p++ = htonl(offset);
	*p++ = htonl(readlen);
	*p++ = 0;

	len = (uint32_t *)p - (uint32_t *)&(data[0]);

	rpc_req (PROG_NFS, NFS_READ, data, len);
}

/**************************************************************************
RPC request dispatcher
**************************************************************************/

static void
NfsSend (void)
{
#ifdef NFS_DEBUG
	printf ("%s\n", __FUNCTION__);
#endif

	switch (NfsState) {
	case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
		rpc_lookup_req (PROG_MOUNT, 1);
		break;
	case STATE_PRCLOOKUP_PROG_NFS_REQ:
		rpc_lookup_req (PROG_NFS, 2);
		break;
	case STATE_MOUNT_REQ:
		nfs_mount_req (nfs_path);
		break;
	case STATE_UMOUNT_REQ:
		nfs_umountall_req ();
		break;
	case STATE_LOOKUP_REQ:
		nfs_lookup_req (nfs_filename);
		break;
	case STATE_READ_REQ:
		nfs_read_req (nfs_offset, nfs_len);
		break;
	case STATE_READLINK_REQ:
		nfs_readlink_req ();
		break;
	}
}

/**************************************************************************
Handlers for the reply from server
**************************************************************************/

static int
rpc_lookup_reply (int prog, uchar *pkt, unsigned len)
{
	struct rpc_t rpc_pkt;

	memcpy ((unsigned char *)&rpc_pkt, pkt, len);

#ifdef NFS_DEBUG
	printf ("%s\n", __FUNCTION__);
#endif

	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
		return -1;

	if (rpc_pkt.u.reply.rstatus  ||
	    rpc_pkt.u.reply.verifier ||
	    rpc_pkt.u.reply.astatus) {
		return -1;
	}

	switch (prog) {
	case PROG_MOUNT:
		NfsSrvMountPort = ntohl(rpc_pkt.u.reply.data[0]);
		break;
	case PROG_NFS:
		NfsSrvNfsPort = ntohl(rpc_pkt.u.reply.data[0]);
		break;
	}

	return 0;
}

static int
nfs_mount_reply (uchar *pkt, unsigned len)
{
	struct rpc_t rpc_pkt;

#ifdef NFS_DEBUG
	printf ("%s\n", __FUNCTION__);
#endif

	memcpy ((unsigned char *)&rpc_pkt, pkt, len);

	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
		return -1;

	if (rpc_pkt.u.reply.rstatus  ||
	    rpc_pkt.u.reply.verifier ||
	    rpc_pkt.u.reply.astatus  ||
	    rpc_pkt.u.reply.data[0]) {
		return -1;
	}

	fs_mounted = 1;
	memcpy (dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);

	return 0;
}

static int
nfs_umountall_reply (uchar *pkt, unsigned len)
{
	struct rpc_t rpc_pkt;

#ifdef NFS_DEBUG
	printf ("%s\n", __FUNCTION__);
#endif

	memcpy ((unsigned char *)&rpc_pkt, pkt, len);

	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
		return -1;

	if (rpc_pkt.u.reply.rstatus  ||
	    rpc_pkt.u.reply.verifier ||
	    rpc_pkt.u.reply.astatus) {
		return -1;
	}

	fs_mounted = 0;
	memset (dirfh, 0, sizeof(dirfh));

	return 0;
}

static int
nfs_lookup_reply (uchar *pkt, unsigned len)
{
	struct rpc_t rpc_pkt;

#ifdef NFS_DEBUG
	printf ("%s\n", __FUNCTION__);
#endif

	memcpy ((unsigned char *)&rpc_pkt, pkt, len);

	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
		return -1;

	if (rpc_pkt.u.reply.rstatus  ||
	    rpc_pkt.u.reply.verifier ||
	    rpc_pkt.u.reply.astatus  ||
	    rpc_pkt.u.reply.data[0]) {
		return -1;
	}

	memcpy (filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);

	return 0;
}

static int
nfs_readlink_reply (uchar *pkt, unsigned len)
{
	struct rpc_t rpc_pkt;
	int rlen;

#ifdef NFS_DEBUG
	printf ("%s\n", __FUNCTION__);
#endif

	memcpy ((unsigned char *)&rpc_pkt, pkt, len);

	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
		return -1;

	if (rpc_pkt.u.reply.rstatus  ||
	    rpc_pkt.u.reply.verifier ||
	    rpc_pkt.u.reply.astatus  ||
	    rpc_pkt.u.reply.data[0]) {
		return -1;
	}

	rlen = ntohl (rpc_pkt.u.reply.data[1]); /* new path length */

	if (*((char *)&(rpc_pkt.u.reply.data[2])) != '/') {
		int pathlen;
		strcat (nfs_path, "/");
		pathlen = strlen(nfs_path);
		memcpy (nfs_path+pathlen, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
		nfs_path[pathlen+rlen+1] = 0;
	} else {
		memcpy (nfs_path, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
		nfs_path[rlen] = 0;
	}
	return 0;
}

static int
nfs_read_reply (uchar *pkt, unsigned len)
{
	struct rpc_t rpc_pkt;
	int rlen;

#ifdef NFS_DEBUG_nop
	printf ("%s\n", __FUNCTION__);
#endif

	memcpy ((uchar *)&rpc_pkt, pkt, sizeof(rpc_pkt.u.reply));

	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
		return -1;

	if (rpc_pkt.u.reply.rstatus  ||
	    rpc_pkt.u.reply.verifier ||
	    rpc_pkt.u.reply.astatus  ||
	    rpc_pkt.u.reply.data[0]) {
		if (rpc_pkt.u.reply.rstatus) {
			return -9999;
		}
		if (rpc_pkt.u.reply.astatus) {
			return -9999;
		}
		return -ntohl(rpc_pkt.u.reply.data[0]);;
	}

	if ((nfs_offset!=0) && !((nfs_offset) % (NFS_READ_SIZE/2*10*HASHES_PER_LINE))) {
		puts ("\n\t ");
	}
	if (!(nfs_offset % ((NFS_READ_SIZE/2)*10))) {
		putc ('#');
	}

	rlen = ntohl(rpc_pkt.u.reply.data[18]);
	if ( store_block ((uchar *)pkt+sizeof(rpc_pkt.u.reply), nfs_offset, rlen) )
		return -9999;

	return rlen;
}

/**************************************************************************
Interfaces of U-BOOT
**************************************************************************/

static void
NfsTimeout (void)
{
	if ( NfsTimeoutCount++ < NFS_RETRY_COUNT ) {
		NfsSend ();
		return;
	}
	puts ("Timeout\n");
	NetState = NETLOOP_FAIL;
	return;
}

static void
NfsHandler (uchar *pkt, unsigned dest, unsigned src, unsigned len)
{
	int rlen;

#ifdef NFS_DEBUG
	printf ("%s\n", __FUNCTION__);
#endif

	if (dest != NfsOurPort) return;

	switch (NfsState) {
	case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
		rpc_lookup_reply (PROG_MOUNT, pkt, len);
		NfsState = STATE_PRCLOOKUP_PROG_NFS_REQ;
		NfsSend ();
		break;

	case STATE_PRCLOOKUP_PROG_NFS_REQ:
		rpc_lookup_reply (PROG_NFS, pkt, len);
		NfsState = STATE_MOUNT_REQ;
		NfsSend ();
		break;

	case STATE_MOUNT_REQ:
		if (nfs_mount_reply(pkt, len)) {
			puts ("*** ERROR: Cannot mount\n");
			/* just to be sure... */
			NfsState = STATE_UMOUNT_REQ;
			NfsSend ();
		} else {
			NfsState = STATE_LOOKUP_REQ;
			NfsSend ();
		}
		break;

	case STATE_UMOUNT_REQ:
		if (nfs_umountall_reply(pkt, len)) {
			puts ("*** ERROR: Cannot umount\n");
			NetState = NETLOOP_FAIL;
		} else {
			puts ("\ndone\n");
			NetState = NfsDownloadState;
		}
		break;

	case STATE_LOOKUP_REQ:
		if (nfs_lookup_reply(pkt, len)) {
			puts ("*** ERROR: File lookup fail\n");
			NfsState = STATE_UMOUNT_REQ;
			NfsSend ();
		} else {
			NfsState = STATE_READ_REQ;
			nfs_offset = 0;
			nfs_len = NFS_READ_SIZE;
			NfsSend ();
		}
		break;

	case STATE_READLINK_REQ:
		if (nfs_readlink_reply(pkt, len)) {
			puts ("*** ERROR: Symlink fail\n");
			NfsState = STATE_UMOUNT_REQ;
			NfsSend ();
		} else {
#ifdef NFS_DEBUG
			printf ("Symlink --> %s\n", nfs_path);
#endif
			nfs_filename = basename (nfs_path);
			nfs_path     = dirname (nfs_path);

			NfsState = STATE_MOUNT_REQ;
			NfsSend ();
		}
		break;

	case STATE_READ_REQ:
		rlen = nfs_read_reply (pkt, len);
		NetSetTimeout (NFS_TIMEOUT * CFG_HZ, NfsTimeout);
		if (rlen > 0) {
			nfs_offset += rlen;
			NfsSend ();
		}
		else if ((rlen == -NFSERR_ISDIR)||(rlen == -NFSERR_INVAL)) {
			/* symbolic link */
			NfsState = STATE_READLINK_REQ;
			NfsSend ();
		} else {
			if ( ! rlen ) NfsDownloadState = NETLOOP_SUCCESS;
			NfsState = STATE_UMOUNT_REQ;
			NfsSend ();
		}
		break;
	}
}


void
NfsStart (void)
{
#ifdef NFS_DEBUG
	printf ("%s\n", __FUNCTION__);
#endif
	NfsDownloadState = NETLOOP_FAIL;

	NfsServerIP = NetServerIP;
	nfs_path = (char *)nfs_path_buff;

	if (nfs_path == NULL) {
		NetState = NETLOOP_FAIL;
		puts ("*** ERROR: Fail allocate memory\n");
		return;
	}

	if (BootFile[0] == '\0') {
		sprintf (default_filename, "/nfsroot/%02lX%02lX%02lX%02lX.img",
			NetOurIP & 0xFF,
			(NetOurIP >>  8) & 0xFF,
			(NetOurIP >> 16) & 0xFF,
			(NetOurIP >> 24) & 0xFF	);
		strcpy (nfs_path, default_filename);

		printf ("*** Warning: no boot file name; using '%s'\n",
			nfs_path);
	} else {
		char *p=BootFile;

		p = strchr (p, ':');

		if (p != NULL) {
			NfsServerIP = string_to_ip (BootFile);
			++p;
			strcpy (nfs_path, p);
		} else {
			strcpy (nfs_path, BootFile);
		}
	}

	nfs_filename = basename (nfs_path);
	nfs_path     = dirname (nfs_path);

#if defined(CONFIG_NET_MULTI)
	printf ("Using %s device\n", eth_get_name());
#endif

	puts ("File transfer via NFS from server "); print_IPaddr (NfsServerIP);
	puts ("; our IP address is ");		    print_IPaddr (NetOurIP);

	/* Check if we need to send across this subnet */
	if (NetOurGatewayIP && NetOurSubnetMask) {
		IPaddr_t OurNet	    = NetOurIP	  & NetOurSubnetMask;
		IPaddr_t ServerNet  = NetServerIP & NetOurSubnetMask;

		if (OurNet != ServerNet) {
			puts ("; sending through gateway ");
			print_IPaddr (NetOurGatewayIP) ;
		}
	}
	printf ("\nFilename '%s/%s'.", nfs_path, nfs_filename);

	if (NetBootFileSize) {
		printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
		print_size (NetBootFileSize<<9, "");
	}
	printf ("\nLoad address: 0x%lx\n"
		"Loading: *\b", load_addr);

	NetSetTimeout (NFS_TIMEOUT * CFG_HZ, NfsTimeout);
	NetSetHandler (NfsHandler);

	NfsTimeoutCount = 0;
	NfsState = STATE_PRCLOOKUP_PROG_MOUNT_REQ;

	/*NfsOurPort = 4096 + (get_ticks() % 3072);*/
	/*FIX ME !!!*/
	NfsOurPort = 1000;

	/* zero out server ether in case the server ip has changed */
	memset (NetServerEther, 0, 6);

	NfsSend ();
}

#endif
Commit	Line	Data
cbd8a35c WD	1	/*
	2	* NFS support driver - based on etherboot and U-BOOT's tftp.c
	3	*
	4	* Masami Komiya <[email protected]> 2004
	5	*
	6	*/
	7
	8	/* NOTE: the NFS code is heavily inspired by the NetBSD netboot code (read:
	9	* large portions are copied verbatim) as distributed in OSKit 0.97. A few
	10	* changes were necessary to adapt the code to Etherboot and to fix several
	11	* inconsistencies. Also the RPC message preparation is done "by hand" to
	12	* avoid adding netsprintf() which I find hard to understand and use. */
	13
	14	/* NOTE 2: Etherboot does not care about things beyond the kernel image, so
	15	* it loads the kernel image off the boot server (ARP_SERVER) and does not
	16	* access the client root disk (root-path in dhcpd.conf), which would use
	17	* ARP_ROOTSERVER. The root disk is something the operating system we are
	18	* about to load needs to use. This is different from the OSKit 0.97 logic. */
	19
	20	/* NOTE 3: Symlink handling introduced by Anselm M Hoffmeister, 2003-July-14
	21	* If a symlink is encountered, it is followed as far as possible (recursion
	22	* possible, maximum 16 steps). There is no clearing of ".."'s inside the
	23	* path, so please DON'T DO THAT. thx. */
	24
	25	#include <common.h>
	26	#include <command.h>
	27	#include <net.h>
	28	#include <malloc.h>
	29	#include "nfs.h"
	30	#include "bootp.h"
	31
	32	/#define NFS_DEBUG/
	33
3865b1fb	34	#if defined(CONFIG_CMD_NET) && defined(CONFIG_CMD_NFS)
cbd8a35c WD	35
cbd8a35c WD	36	#define HASHES_PER_LINE 65 /* Number of "loading" hashes per line */
fe891ecf HI	37	#define NFS_RETRY_COUNT 30
fe891ecf HI	38	#define NFS_TIMEOUT 2UL
cbd8a35c WD	39
cbd8a35c WD	40	static int fs_mounted = 0;
c3f9d493	41	static unsigned long rpc_id = 0;
cbd8a35c WD	42	static int nfs_offset = -1;
	43	static int nfs_len;
	44
	45	static char dirfh[NFS_FHSIZE]; /* file handle of directory */
	46	static char filefh[NFS_FHSIZE]; /* file handle of kernel image */
	47
23a7a32d	48	static int NfsDownloadState;
cbd8a35c WD	49	static IPaddr_t NfsServerIP;
	50	static int NfsSrvMountPort;
	51	static int NfsSrvNfsPort;
	52	static int NfsOurPort;
	53	static int NfsTimeoutCount;
	54	static int NfsState;
	55	#define STATE_PRCLOOKUP_PROG_MOUNT_REQ 1
	56	#define STATE_PRCLOOKUP_PROG_NFS_REQ 2
	57	#define STATE_MOUNT_REQ 3
	58	#define STATE_UMOUNT_REQ 4
	59	#define STATE_LOOKUP_REQ 5
	60	#define STATE_READ_REQ 6
	61	#define STATE_READLINK_REQ 7
	62
	63	static char default_filename[64];
	64	static char *nfs_filename;
	65	static char *nfs_path;
	66	static char nfs_path_buff[2048];
	67
23a7a32d	68	static __inline__ int
cbd8a35c WD	69	store_block (uchar * src, unsigned offset, unsigned len)
cbd8a35c WD	70	{
a084f7da	71	ulong newsize = offset + len;
cbd8a35c WD	72	#ifdef CFG_DIRECT_FLASH_NFS
	73	int i, rc = 0;
	74
	75	for (i=0; i<CFG_MAX_FLASH_BANKS; i++) {
	76	/* start address in flash? */
	77	if (load_addr + offset >= flash_info[i].start[0]) {
	78	rc = 1;
	79	break;
	80	}
	81	}
	82
	83	if (rc) { /* Flash is destination for this packet */
	84	rc = flash_write ((uchar *)src, (ulong)(load_addr+offset), len);
	85	if (rc) {
	86	flash_perror (rc);
23a7a32d	87	return -1;
cbd8a35c WD	88	}
	89	} else
	90	#endif /* CFG_DIRECT_FLASH_NFS */
cbd8a35c WD	91	{
	92	(void)memcpy ((void *)(load_addr + offset), src, len);
	93	}
a084f7da WD	94
	95	if (NetBootFileXferSize < (offset+len))
	96	NetBootFileXferSize = newsize;
23a7a32d	97	return 0;
cbd8a35c WD	98	}
	99
	100	static char*
	101	basename (char *path)
	102	{
	103	char *fname;
	104
	105	fname = path + strlen(path) - 1;
	106	while (fname >= path) {
	107	if (*fname == '/') {
	108	fname++;
	109	break;
	110	}
	111	fname--;
	112	}
	113	return fname;
	114	}
	115
	116	static char*
	117	dirname (char *path)
	118	{
	119	char *fname;
	120
	121	fname = basename (path);
	122	--fname;
	123	*fname = '\0';
	124	return path;
	125	}
	126
cbd8a35c WD	127	/**************************************************************************
	128	RPC_ADD_CREDENTIALS - Add RPC authentication/verifier entries
	129	**************************************************************************/
	130	static long rpc_add_credentials (long p)
	131	{
	132	int hl;
	133	int hostnamelen;
	134	char hostname[256];
	135
	136	strcpy (hostname, "");
	137	hostnamelen=strlen (hostname);
	138
	139	/* Here's the executive summary on authentication requirements of the
	140	* various NFS server implementations: Linux accepts both AUTH_NONE
	141	* and AUTH_UNIX authentication (also accepts an empty hostname field
	142	* in the AUTH_UNIX scheme). *BSD refuses AUTH_NONE, but accepts
	143	* AUTH_UNIX (also accepts an empty hostname field in the AUTH_UNIX
	144	* scheme). To be safe, use AUTH_UNIX and pass the hostname if we have
	145	* it (if the BOOTP/DHCP reply didn't give one, just use an empty
	146	* hostname). */
	147
	148	hl = (hostnamelen + 3) & ~3;
	149
	150	/* Provide an AUTH_UNIX credential. */
	151	p++ = htonl(1); / AUTH_UNIX */
	152	p++ = htonl(hl+20); / auth length */
	153	p++ = htonl(0); / stamp */
	154	p++ = htonl(hostnamelen); / hostname string */
	155	if (hostnamelen & 3) {
	156	(p + hostnamelen / 4) = 0; / add zero padding */
	157	}
	158	memcpy (p, hostname, hostnamelen);
	159	p += hl / 4;
	160	p++ = 0; / uid */
	161	p++ = 0; / gid */
	162	p++ = 0; / auxiliary gid list */
	163
	164	/* Provide an AUTH_NONE verifier. */
	165	p++ = 0; / AUTH_NONE */
	166	p++ = 0; / auth length */
	167
	168	return p;
	169	}
	170
	171	/**************************************************************************
	172	RPC_LOOKUP - Lookup RPC Port numbers
	173	**************************************************************************/
	174	static void
	175	rpc_req (int rpc_prog, int rpc_proc, uint32_t *data, int datalen)
	176	{
	177	struct rpc_t pkt;
	178	unsigned long id;
	179	uint32_t *p;
	180	int pktlen;
	181	int sport;
	182
c3f9d493	183	id = ++rpc_id;
cbd8a35c WD	184	pkt.u.call.id = htonl(id);
	185	pkt.u.call.type = htonl(MSG_CALL);
	186	pkt.u.call.rpcvers = htonl(2); /* use RPC version 2 */
	187	pkt.u.call.prog = htonl(rpc_prog);
	188	pkt.u.call.vers = htonl(2); /* portmapper is version 2 */
	189	pkt.u.call.proc = htonl(rpc_proc);
	190	p = (uint32_t *)&(pkt.u.call.data);
	191
	192	if (datalen)
	193	memcpy ((char )p, (char )data, datalen*sizeof(uint32_t));
	194
	195	pktlen = (char )p + datalensizeof(uint32_t) - (char *)&pkt;
	196
a3d991bd	197	memcpy ((char )NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE, (char )&pkt, pktlen);
cbd8a35c WD	198
	199	if (rpc_prog == PROG_PORTMAP)
	200	sport = SUNRPC_PORT;
	201	else if (rpc_prog == PROG_MOUNT)
	202	sport = NfsSrvMountPort;
	203	else
	204	sport = NfsSrvNfsPort;
	205
	206	NetSendUDPPacket (NetServerEther, NfsServerIP, sport, NfsOurPort, pktlen);
	207	}
	208
	209	/**************************************************************************
	210	RPC_LOOKUP - Lookup RPC Port numbers
	211	**************************************************************************/
	212	static void
	213	rpc_lookup_req (int prog, int ver)
	214	{
	215	uint32_t data[16];
	216
	217	data[0] = 0; data[1] = 0; /* auth credential */
	218	data[2] = 0; data[3] = 0; /* auth verifier */
	219	data[4] = htonl(prog);
	220	data[5] = htonl(ver);
	221	data[6] = htonl(17); /* IP_UDP */
	222	data[7] = 0;
	223
	224	rpc_req (PROG_PORTMAP, PORTMAP_GETPORT, data, 8);
	225	}
	226
	227	/**************************************************************************
	228	NFS_MOUNT - Mount an NFS Filesystem
	229	**************************************************************************/
	230	static void
	231	nfs_mount_req (char *path)
	232	{
	233	uint32_t data[1024];
	234	uint32_t *p;
	235	int len;
	236	int pathlen;
	237
	238	pathlen = strlen (path);
	239
	240	p = &(data[0]);
	241	p = (uint32_t )rpc_add_credentials((long )p);
	242
	243	*p++ = htonl(pathlen);
	244	if (pathlen & 3) *(p + pathlen / 4) = 0;
	245	memcpy (p, path, pathlen);
	246	p += (pathlen + 3) / 4;
	247
	248	len = (uint32_t )p - (uint32_t )&(data[0]);
	249
	250	rpc_req (PROG_MOUNT, MOUNT_ADDENTRY, data, len);
	251	}
	252
	253	/**************************************************************************
	254	NFS_UMOUNTALL - Unmount all our NFS Filesystems on the Server
	255	**************************************************************************/
	256	static void
	257	nfs_umountall_req (void)
	258	{
	259	uint32_t data[1024];
	260	uint32_t *p;
	261	int len;
262
263	if ((NfsSrvMountPort == -1) \|\| (!fs_mounted)) {
264	/* Nothing mounted, nothing to umount */
265	return;
266	}
267
268	p = &(data[0]);
269	p = (uint32_t )rpc_add_credentials ((long )p);
270
271	len = (uint32_t )p - (uint32_t )&(data[0]);
272
273	rpc_req (PROG_MOUNT, MOUNT_UMOUNTALL, data, len);
274	}
275
276	/***************************************************************************
277	* NFS_READLINK (AH 2003-07-14)
278	* This procedure is called when read of the first block fails -
279	* this probably happens when it's a directory or a symlink
280	* In case of successful readlink(), the dirname is manipulated,
281	* so that inside the nfs() function a recursion can be done.
282	**************************************************************************/
283	static void
284	nfs_readlink_req (void)
285	{
286	uint32_t data[1024];
287	uint32_t *p;
288	int len;
289
290	p = &(data[0]);
291	p = (uint32_t )rpc_add_credentials ((long )p);
292
293	memcpy (p, filefh, NFS_FHSIZE);
294	p += (NFS_FHSIZE / 4);
295
296	len = (uint32_t )p - (uint32_t )&(data[0]);
297
298	rpc_req (PROG_NFS, NFS_READLINK, data, len);
299	}
300
301	/**************************************************************************
302	NFS_LOOKUP - Lookup Pathname
303	**************************************************************************/
304	static void
305	nfs_lookup_req (char *fname)
306	{
307	uint32_t data[1024];
308	uint32_t *p;
309	int len;
310	int fnamelen;
311
312	fnamelen = strlen (fname);
313
314	p = &(data[0]);
315	p = (uint32_t )rpc_add_credentials ((long )p);
316
317	memcpy (p, dirfh, NFS_FHSIZE);
318	p += (NFS_FHSIZE / 4);
319	*p++ = htonl(fnamelen);
320	if (fnamelen & 3) *(p + fnamelen / 4) = 0;
321	memcpy (p, fname, fnamelen);
322	p += (fnamelen + 3) / 4;
323
324	len = (uint32_t )p - (uint32_t )&(data[0]);
325
326	rpc_req (PROG_NFS, NFS_LOOKUP, data, len);
327	}
328
329	/**************************************************************************
330	NFS_READ - Read File on NFS Server
331	**************************************************************************/
332	static void
333	nfs_read_req (int offset, int readlen)
334	{
335	uint32_t data[1024];
336	uint32_t *p;
337	int len;
338
339	p = &(data[0]);
340	p = (uint32_t )rpc_add_credentials ((long )p);
341
342	memcpy (p, filefh, NFS_FHSIZE);
343	p += (NFS_FHSIZE / 4);
344	*p++ = htonl(offset);
345	*p++ = htonl(readlen);
346	*p++ = 0;
347
348	len = (uint32_t )p - (uint32_t )&(data[0]);
349
350	rpc_req (PROG_NFS, NFS_READ, data, len);
351	}
352
353	/**************************************************************************
354	RPC request dispatcher
355	**************************************************************************/
356
357	static void
358	NfsSend (void)
359	{
360	#ifdef NFS_DEBUG
361	printf ("%s\n", __FUNCTION__);
362	#endif
363
364	switch (NfsState) {
365	case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
366	rpc_lookup_req (PROG_MOUNT, 1);
367	break;
368	case STATE_PRCLOOKUP_PROG_NFS_REQ:
369	rpc_lookup_req (PROG_NFS, 2);
370	break;
371	case STATE_MOUNT_REQ:
372	nfs_mount_req (nfs_path);
373	break;
374	case STATE_UMOUNT_REQ:
375	nfs_umountall_req ();
376	break;
377	case STATE_LOOKUP_REQ:
378	nfs_lookup_req (nfs_filename);
379	break;
380	case STATE_READ_REQ:
381	nfs_read_req (nfs_offset, nfs_len);
382	break;
383	case STATE_READLINK_REQ:
384	nfs_readlink_req ();
385	break;
386	}
387	}
388
389	/**************************************************************************
390	Handlers for the reply from server
391	**************************************************************************/
392
393	static int
394	rpc_lookup_reply (int prog, uchar *pkt, unsigned len)
395	{
396	struct rpc_t rpc_pkt;
397
398	memcpy ((unsigned char *)&rpc_pkt, pkt, len);
399
400	#ifdef NFS_DEBUG
401	printf ("%s\n", __FUNCTION__);
402	#endif
403
c3f9d493 WD	404	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
	405	return -1;
	406
cbd8a35c WD	407	if (rpc_pkt.u.reply.rstatus \|\|
cbd8a35c WD	408	rpc_pkt.u.reply.verifier \|\|
cbd8a35c	409	rpc_pkt.u.reply.astatus) {
c3f9d493	410	return -1;
cbd8a35c WD	411	}
	412
	413	switch (prog) {
	414	case PROG_MOUNT:
	415	NfsSrvMountPort = ntohl(rpc_pkt.u.reply.data[0]);
	416	break;
	417	case PROG_NFS:
	418	NfsSrvNfsPort = ntohl(rpc_pkt.u.reply.data[0]);
	419	break;
	420	}
	421
	422	return 0;
	423	}
	424
	425	static int
	426	nfs_mount_reply (uchar *pkt, unsigned len)
	427	{
	428	struct rpc_t rpc_pkt;
	429
	430	#ifdef NFS_DEBUG
	431	printf ("%s\n", __FUNCTION__);
	432	#endif
	433
	434	memcpy ((unsigned char *)&rpc_pkt, pkt, len);
	435
c3f9d493 WD	436	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
	437	return -1;
	438
cbd8a35c WD	439	if (rpc_pkt.u.reply.rstatus \|\|
	440	rpc_pkt.u.reply.verifier \|\|
	441	rpc_pkt.u.reply.astatus \|\|
	442	rpc_pkt.u.reply.data[0]) {
	443	return -1;
	444	}
	445
	446	fs_mounted = 1;
	447	memcpy (dirfh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
	448
	449	return 0;
	450	}
	451
	452	static int
	453	nfs_umountall_reply (uchar *pkt, unsigned len)
	454	{
	455	struct rpc_t rpc_pkt;
	456
	457	#ifdef NFS_DEBUG
	458	printf ("%s\n", __FUNCTION__);
	459	#endif
	460
	461	memcpy ((unsigned char *)&rpc_pkt, pkt, len);
	462
c3f9d493 WD	463	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
	464	return -1;
	465
cbd8a35c WD	466	if (rpc_pkt.u.reply.rstatus \|\|
	467	rpc_pkt.u.reply.verifier \|\|
	468	rpc_pkt.u.reply.astatus) {
	469	return -1;
	470	}
	471
	472	fs_mounted = 0;
	473	memset (dirfh, 0, sizeof(dirfh));
	474
	475	return 0;
	476	}
	477
	478	static int
	479	nfs_lookup_reply (uchar *pkt, unsigned len)
	480	{
	481	struct rpc_t rpc_pkt;
	482
	483	#ifdef NFS_DEBUG
	484	printf ("%s\n", __FUNCTION__);
	485	#endif
	486
	487	memcpy ((unsigned char *)&rpc_pkt, pkt, len);
	488
c3f9d493 WD	489	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
	490	return -1;
	491
cbd8a35c WD	492	if (rpc_pkt.u.reply.rstatus \|\|
	493	rpc_pkt.u.reply.verifier \|\|
	494	rpc_pkt.u.reply.astatus \|\|
	495	rpc_pkt.u.reply.data[0]) {
	496	return -1;
	497	}
	498
	499	memcpy (filefh, rpc_pkt.u.reply.data + 1, NFS_FHSIZE);
	500
	501	return 0;
	502	}
	503
	504	static int
	505	nfs_readlink_reply (uchar *pkt, unsigned len)
	506	{
	507	struct rpc_t rpc_pkt;
	508	int rlen;
	509
	510	#ifdef NFS_DEBUG
	511	printf ("%s\n", __FUNCTION__);
	512	#endif
	513
	514	memcpy ((unsigned char *)&rpc_pkt, pkt, len);
	515
c3f9d493 WD	516	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
	517	return -1;
	518
cbd8a35c WD	519	if (rpc_pkt.u.reply.rstatus \|\|
	520	rpc_pkt.u.reply.verifier \|\|
	521	rpc_pkt.u.reply.astatus \|\|
	522	rpc_pkt.u.reply.data[0]) {
	523	return -1;
	524	}
	525
	526	rlen = ntohl (rpc_pkt.u.reply.data[1]); /* new path length */
	527
	528	if (((char )&(rpc_pkt.u.reply.data[2])) != '/') {
	529	int pathlen;
	530	strcat (nfs_path, "/");
	531	pathlen = strlen(nfs_path);
	532	memcpy (nfs_path+pathlen, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
	533	nfs_path[pathlen+rlen+1] = 0;
	534	} else {
	535	memcpy (nfs_path, (uchar *)&(rpc_pkt.u.reply.data[2]), rlen);
	536	nfs_path[rlen] = 0;
	537	}
	538	return 0;
	539	}
	540
	541	static int
	542	nfs_read_reply (uchar *pkt, unsigned len)
	543	{
	544	struct rpc_t rpc_pkt;
	545	int rlen;
	546
	547	#ifdef NFS_DEBUG_nop
	548	printf ("%s\n", __FUNCTION__);
	549	#endif
	550
11dadd54	551	memcpy ((uchar *)&rpc_pkt, pkt, sizeof(rpc_pkt.u.reply));
cbd8a35c	552
c3f9d493 WD	553	if (ntohl(rpc_pkt.u.reply.id) != rpc_id)
	554	return -1;
	555
cbd8a35c WD	556	if (rpc_pkt.u.reply.rstatus \|\|
	557	rpc_pkt.u.reply.verifier \|\|
	558	rpc_pkt.u.reply.astatus \|\|
	559	rpc_pkt.u.reply.data[0]) {
	560	if (rpc_pkt.u.reply.rstatus) {
	561	return -9999;
	562	}
	563	if (rpc_pkt.u.reply.astatus) {
	564	return -9999;
	565	}
	566	return -ntohl(rpc_pkt.u.reply.data[0]);;
	567	}
	568
	569	if ((nfs_offset!=0) && !((nfs_offset) % (NFS_READ_SIZE/210HASHES_PER_LINE))) {
	570	puts ("\n\t ");
	571	}
	572	if (!(nfs_offset % ((NFS_READ_SIZE/2)*10))) {
	573	putc ('#');
	574	}
	575
	576	rlen = ntohl(rpc_pkt.u.reply.data[18]);
23a7a32d WD	577	if ( store_block ((uchar *)pkt+sizeof(rpc_pkt.u.reply), nfs_offset, rlen) )
23a7a32d WD	578	return -9999;
cbd8a35c WD	579
	580	return rlen;
	581	}
	582
	583	/**************************************************************************
	584	Interfaces of U-BOOT
	585	**************************************************************************/
	586
a5725fab WD	587	static void
	588	NfsTimeout (void)
	589	{
fe891ecf HI	590	if ( NfsTimeoutCount++ < NFS_RETRY_COUNT ) {
	591	NfsSend ();
	592	return;
	593	}
a5725fab WD	594	puts ("Timeout\n");
	595	NetState = NETLOOP_FAIL;
	596	return;
	597	}
	598
cbd8a35c WD	599	static void
	600	NfsHandler (uchar *pkt, unsigned dest, unsigned src, unsigned len)
	601	{
	602	int rlen;
	603
	604	#ifdef NFS_DEBUG
	605	printf ("%s\n", __FUNCTION__);
	606	#endif
	607
	608	if (dest != NfsOurPort) return;
	609
	610	switch (NfsState) {
	611	case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
	612	rpc_lookup_reply (PROG_MOUNT, pkt, len);
	613	NfsState = STATE_PRCLOOKUP_PROG_NFS_REQ;
	614	NfsSend ();
	615	break;
	616
	617	case STATE_PRCLOOKUP_PROG_NFS_REQ:
	618	rpc_lookup_reply (PROG_NFS, pkt, len);
	619	NfsState = STATE_MOUNT_REQ;
	620	NfsSend ();
	621	break;
	622
	623	case STATE_MOUNT_REQ:
	624	if (nfs_mount_reply(pkt, len)) {
	625	puts ("*** ERROR: Cannot mount\n");
	626	/* just to be sure... */
	627	NfsState = STATE_UMOUNT_REQ;
	628	NfsSend ();
	629	} else {
	630	NfsState = STATE_LOOKUP_REQ;
	631	NfsSend ();
	632	}
	633	break;
	634
	635	case STATE_UMOUNT_REQ:
	636	if (nfs_umountall_reply(pkt, len)) {
	637	puts ("*** ERROR: Cannot umount\n");
	638	NetState = NETLOOP_FAIL;
	639	} else {
a084f7da	640	puts ("\ndone\n");
23a7a32d	641	NetState = NfsDownloadState;
cbd8a35c WD	642	}
	643	break;
	644
	645	case STATE_LOOKUP_REQ:
	646	if (nfs_lookup_reply(pkt, len)) {
	647	puts ("*** ERROR: File lookup fail\n");
	648	NfsState = STATE_UMOUNT_REQ;
	649	NfsSend ();
	650	} else {
	651	NfsState = STATE_READ_REQ;
	652	nfs_offset = 0;
	653	nfs_len = NFS_READ_SIZE;
	654	NfsSend ();
	655	}
	656	break;
	657
	658	case STATE_READLINK_REQ:
	659	if (nfs_readlink_reply(pkt, len)) {
	660	puts ("*** ERROR: Symlink fail\n");
	661	NfsState = STATE_UMOUNT_REQ;
	662	NfsSend ();
	663	} else {
	664	#ifdef NFS_DEBUG
	665	printf ("Symlink --> %s\n", nfs_path);
	666	#endif
	667	nfs_filename = basename (nfs_path);
	668	nfs_path = dirname (nfs_path);
	669
	670	NfsState = STATE_MOUNT_REQ;
	671	NfsSend ();
	672	}
	673	break;
	674
	675	case STATE_READ_REQ:
	676	rlen = nfs_read_reply (pkt, len);
a5725fab	677	NetSetTimeout (NFS_TIMEOUT * CFG_HZ, NfsTimeout);
cbd8a35c WD	678	if (rlen > 0) {
	679	nfs_offset += rlen;
	680	NfsSend ();
	681	}
	682	else if ((rlen == -NFSERR_ISDIR)\|\|(rlen == -NFSERR_INVAL)) {
	683	/* symbolic link */
	684	NfsState = STATE_READLINK_REQ;
	685	NfsSend ();
	686	} else {
23a7a32d	687	if ( ! rlen ) NfsDownloadState = NETLOOP_SUCCESS;
cbd8a35c WD	688	NfsState = STATE_UMOUNT_REQ;
	689	NfsSend ();
	690	}
	691	break;
	692	}
	693	}
	694
cbd8a35c WD	695
	696	void
	697	NfsStart (void)
	698	{
	699	#ifdef NFS_DEBUG
	700	printf ("%s\n", __FUNCTION__);
	701	#endif
23a7a32d	702	NfsDownloadState = NETLOOP_FAIL;
cbd8a35c WD	703
	704	NfsServerIP = NetServerIP;
	705	nfs_path = (char *)nfs_path_buff;
	706
	707	if (nfs_path == NULL) {
	708	NetState = NETLOOP_FAIL;
	709	puts ("*** ERROR: Fail allocate memory\n");
	710	return;
	711	}
	712
	713	if (BootFile[0] == '\0') {
cbd8a35c	714	sprintf (default_filename, "/nfsroot/%02lX%02lX%02lX%02lX.img",
c43352cc WD	715	NetOurIP & 0xFF,
	716	(NetOurIP >> 8) & 0xFF,
	717	(NetOurIP >> 16) & 0xFF,
	718	(NetOurIP >> 24) & 0xFF );
cbd8a35c WD	719	strcpy (nfs_path, default_filename);
	720
	721	printf ("*** Warning: no boot file name; using '%s'\n",
	722	nfs_path);
	723	} else {
	724	char *p=BootFile;
	725
	726	p = strchr (p, ':');
	727
	728	if (p != NULL) {
	729	NfsServerIP = string_to_ip (BootFile);
	730	++p;
	731	strcpy (nfs_path, p);
	732	} else {
	733	strcpy (nfs_path, BootFile);
	734	}
	735	}
	736
	737	nfs_filename = basename (nfs_path);
	738	nfs_path = dirname (nfs_path);
	739
	740	#if defined(CONFIG_NET_MULTI)
	741	printf ("Using %s device\n", eth_get_name());
	742	#endif
	743
	744	puts ("File transfer via NFS from server "); print_IPaddr (NfsServerIP);
	745	puts ("; our IP address is "); print_IPaddr (NetOurIP);
	746
	747	/* Check if we need to send across this subnet */
	748	if (NetOurGatewayIP && NetOurSubnetMask) {
	749	IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
	750	IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask;
	751
	752	if (OurNet != ServerNet) {
	753	puts ("; sending through gateway ");
	754	print_IPaddr (NetOurGatewayIP) ;
	755	}
	756	}
4b9206ed	757	printf ("\nFilename '%s/%s'.", nfs_path, nfs_filename);
cbd8a35c WD	758
	759	if (NetBootFileSize) {
	760	printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
	761	print_size (NetBootFileSize<<9, "");
	762	}
4b9206ed WD	763	printf ("\nLoad address: 0x%lx\n"
4b9206ed WD	764	"Loading: *\b", load_addr);
cbd8a35c WD	765
	766	NetSetTimeout (NFS_TIMEOUT * CFG_HZ, NfsTimeout);
	767	NetSetHandler (NfsHandler);
	768
cbd8a35c WD	769	NfsTimeoutCount = 0;
	770	NfsState = STATE_PRCLOOKUP_PROG_MOUNT_REQ;
	771
	772	/NfsOurPort = 4096 + (get_ticks() % 3072);/
	773	/FIX ME !!!/
	774	NfsOurPort = 1000;
	775
	776	/* zero out server ether in case the server ip has changed */
	777	memset (NetServerEther, 0, 6);
	778
	779	NfsSend ();
	780	}
	781
643d1ab2	782	#endif