/*
   * NFS support driver - based on etherboot and U-BOOT's tftp.c
   *
   * Masami Komiya <mkomiya@sonare.it> 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 HASHES_PER_LINE 65	/* Number of "loading" hashes per line	*/
  #define NFS_RETRY_COUNT 30
  #ifndef CONFIG_NFS_TIMEOUT
  # define NFS_TIMEOUT 2000UL
  #else
  # define NFS_TIMEOUT CONFIG_NFS_TIMEOUT
  #endif
  
  #define NFS_RPC_ERR	1
  #define NFS_RPC_DROP	124
  
  static int fs_mounted;
  static unsigned long rpc_id;
  static int nfs_offset = -1;
  static int nfs_len;
  static ulong nfs_timeout = NFS_TIMEOUT;
  
  static char dirfh[NFS_FHSIZE];	/* file handle of directory */
  static char filefh[NFS_FHSIZE]; /* file handle of kernel image */
  
  static enum net_loop_state nfs_download_state;
  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 CONFIG_SYS_DIRECT_FLASH_NFS
  	int i, rc = 0;
  
  	for (i = 0; i < CONFIG_SYS_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 /* CONFIG_SYS_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_UDP_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)
  {
  	debug("%s
  ", __func__);
  
  	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);
  
  	debug("%s
  ", __func__);
  
  	if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
  		return -NFS_RPC_ERR;
  	else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
  		return -NFS_RPC_DROP;
  
  	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;
  
  	debug("%s
  ", __func__);
  
  	memcpy((unsigned char *)&rpc_pkt, pkt, len);
  
  	if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
  		return -NFS_RPC_ERR;
  	else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
  		return -NFS_RPC_DROP;
  
  	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;
  
  	debug("%s
  ", __func__);
  
  	memcpy((unsigned char *)&rpc_pkt, pkt, len);
  
  	if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
  		return -NFS_RPC_ERR;
  	else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
  		return -NFS_RPC_DROP;
  
  	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;
  
  	debug("%s
  ", __func__);
  
  	memcpy((unsigned char *)&rpc_pkt, pkt, len);
  
  	if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
  		return -NFS_RPC_ERR;
  	else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
  		return -NFS_RPC_DROP;
  
  	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;
  
  	debug("%s
  ", __func__);
  
  	memcpy((unsigned char *)&rpc_pkt, pkt, len);
  
  	if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
  		return -NFS_RPC_ERR;
  	else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
  		return -NFS_RPC_DROP;
  
  	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] = 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;
  
  	debug("%s
  ", __func__);
  
  	memcpy((uchar *)&rpc_pkt, pkt, sizeof(rpc_pkt.u.reply));
  
  	if (ntohl(rpc_pkt.u.reply.id) > rpc_id)
  		return -NFS_RPC_ERR;
  	else if (ntohl(rpc_pkt.u.reply.id) < rpc_id)
  		return -NFS_RPC_DROP;
  
  	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("
  \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) {
  		puts("
  Retry count exceeded; starting again
  ");
  		NetStartAgain();
  	} else {
  		puts("T ");
  		NetSetTimeout(nfs_timeout + NFS_TIMEOUT * NfsTimeoutCount,
  			      NfsTimeout);
  		NfsSend();
  	}
  }
  
  static void
  NfsHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, unsigned len)
  {
  	int rlen;
  	int reply;
  
  	debug("%s
  ", __func__);
  
  	if (dest != NfsOurPort)
  		return;
  
  	switch (NfsState) {
  	case STATE_PRCLOOKUP_PROG_MOUNT_REQ:
  		if (rpc_lookup_reply(PROG_MOUNT, pkt, len) == -NFS_RPC_DROP)
  			break;
  		NfsState = STATE_PRCLOOKUP_PROG_NFS_REQ;
  		NfsSend();
  		break;
  
  	case STATE_PRCLOOKUP_PROG_NFS_REQ:
  		if (rpc_lookup_reply(PROG_NFS, pkt, len) == -NFS_RPC_DROP)
  			break;
  		NfsState = STATE_MOUNT_REQ;
  		NfsSend();
  		break;
  
  	case STATE_MOUNT_REQ:
  		reply = nfs_mount_reply(pkt, len);
  		if (reply == -NFS_RPC_DROP)
  			break;
  		else if (reply == -NFS_RPC_ERR) {
  			puts("*** ERROR: Cannot mount
  ");
  			/* just to be sure... */
  			NfsState = STATE_UMOUNT_REQ;
  			NfsSend();
  		} else {
  			NfsState = STATE_LOOKUP_REQ;
  			NfsSend();
  		}
  		break;
  
  	case STATE_UMOUNT_REQ:
  		reply = nfs_umountall_reply(pkt, len);
  		if (reply == -NFS_RPC_DROP)
  			break;
  		else if (reply == -NFS_RPC_ERR) {
  			puts("*** ERROR: Cannot umount
  ");
  			net_set_state(NETLOOP_FAIL);
  		} else {
  			puts("
  done
  ");
  			net_set_state(nfs_download_state);
  		}
  		break;
  
  	case STATE_LOOKUP_REQ:
  		reply = nfs_lookup_reply(pkt, len);
  		if (reply == -NFS_RPC_DROP)
  			break;
  		else if (reply == -NFS_RPC_ERR) {
  			puts("*** ERROR: File lookup fail
  ");
  			NfsState = STATE_UMOUNT_REQ;
  			NfsSend();
  		} else {
  			NfsState = STATE_READ_REQ;
  			nfs_offset = 0;
  			nfs_len = NFS_READ_SIZE;
  			NfsSend();
  		}
  		break;
  
  	case STATE_READLINK_REQ:
  		reply = nfs_readlink_reply(pkt, len);
  		if (reply == -NFS_RPC_DROP)
  			break;
  		else if (reply == -NFS_RPC_ERR) {
  			puts("*** ERROR: Symlink fail
  ");
  			NfsState = STATE_UMOUNT_REQ;
  			NfsSend();
  		} else {
  			debug("Symlink --> %s
  ", nfs_path);
  			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, 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)
  				nfs_download_state = NETLOOP_SUCCESS;
  			NfsState = STATE_UMOUNT_REQ;
  			NfsSend();
  		}
  		break;
  	}
  }
  
  
  void
  NfsStart(void)
  {
  	debug("%s
  ", __func__);
  	nfs_download_state = NETLOOP_FAIL;
  
  	NfsServerIP = NetServerIP;
  	nfs_path = (char *)nfs_path_buff;
  
  	if (nfs_path == NULL) {
  		net_set_state(NETLOOP_FAIL);
  		puts("*** ERROR: Fail allocate memory
  ");
  		return;
  	}
  
  	if (BootFile[0] == '\0') {
  		sprintf(default_filename, "/nfsroot/%02X%02X%02X%02X.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'
  ",
  			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);
  
  	printf("Using %s device
  ", eth_get_name());
  
  	printf("File transfer via NFS from server %pI4"
  		"; our IP address is %pI4", &NfsServerIP, &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)
  			printf("; sending through gateway %pI4",
  				&NetOurGatewayIP);
  	}
  	printf("
  Filename '%s/%s'.", nfs_path, nfs_filename);
  
  	if (NetBootFileSize) {
  		printf(" Size is 0x%x Bytes = ", NetBootFileSize<<9);
  		print_size(NetBootFileSize<<9, "");
  	}
  	printf("
  Load address: 0x%lx
  "
  		"Loading: *\b", load_addr);
  
  	NetSetTimeout(nfs_timeout, NfsTimeout);
  	net_set_udp_handler(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();
  }