[u-boot.git] / net / tftp.c

/*
 *	Copyright 1994, 1995, 2000 Neil Russell.
 *	(See License)
 *	Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, [email protected]
 */

#include <common.h>
#include <command.h>
#include <net.h>
#include "tftp.h"
#include "bootp.h"

#undef	ET_DEBUG

#if defined(CONFIG_CMD_NET)

#define WELL_KNOWN_PORT	69		/* Well known TFTP port #		*/
#define TIMEOUT		5		/* Seconds to timeout for a lost pkt	*/
#ifndef	CONFIG_NET_RETRY_COUNT
# define TIMEOUT_COUNT	10		/* # of timeouts before giving up  */
#else
# define TIMEOUT_COUNT  (CONFIG_NET_RETRY_COUNT * 2)
#endif
					/* (for checking the image size)	*/
#define HASHES_PER_LINE	65		/* Number of "loading" hashes per line	*/

/*
 *	TFTP operations.
 */
#define TFTP_RRQ	1
#define TFTP_WRQ	2
#define TFTP_DATA	3
#define TFTP_ACK	4
#define TFTP_ERROR	5
#define TFTP_OACK	6


static int	TftpServerPort;		/* The UDP port at their end		*/
static int	TftpOurPort;		/* The UDP port at our end		*/
static int	TftpTimeoutCount;
static ulong	TftpBlock;		/* packet sequence number		*/
static ulong	TftpLastBlock;		/* last packet sequence number received */
static ulong	TftpBlockWrap;		/* count of sequence number wraparounds */
static ulong	TftpBlockWrapOffset;	/* memory offset due to wrapping	*/
static int	TftpState;

#define STATE_RRQ	1
#define STATE_DATA	2
#define STATE_TOO_LARGE	3
#define STATE_BAD_MAGIC	4
#define STATE_OACK	5

#define TFTP_BLOCK_SIZE		512		    /* default TFTP block size	*/
#define TFTP_SEQUENCE_SIZE	((ulong)(1<<16))    /* sequence number is 16 bit */

#define DEFAULT_NAME_LEN	(8 + 4 + 1)
static char default_filename[DEFAULT_NAME_LEN];
static char *tftp_filename;

#ifdef CFG_DIRECT_FLASH_TFTP
extern flash_info_t flash_info[];
#endif

/* 512 is poor choice for ethernet, MTU is typically 1500.
 * Minus eth.hdrs thats 1468.  Can get 2x better throughput with
 * almost-MTU block sizes.  At least try... fall back to 512 if need be.
 */
#define TFTP_MTU_BLOCKSIZE 1468
static unsigned short TftpBlkSize=TFTP_BLOCK_SIZE;
static unsigned short TftpBlkSizeOption=TFTP_MTU_BLOCKSIZE;

#ifdef CONFIG_MCAST_TFTP
#include <malloc.h>
#define MTFTP_BITMAPSIZE	0x1000
static unsigned *Bitmap;
static int PrevBitmapHole,Mapsize=MTFTP_BITMAPSIZE;
static uchar ProhibitMcast=0, MasterClient=0;
static uchar Multicast=0;
extern IPaddr_t Mcast_addr;
static int Mcast_port;
static ulong TftpEndingBlock; /* can get 'last' block before done..*/

static void parse_multicast_oack(char *pkt,int len);

static void
mcast_cleanup(void)
{
	if (Mcast_addr) eth_mcast_join(Mcast_addr, 0);
	if (Bitmap) free(Bitmap);
	Bitmap=NULL;
	Mcast_addr = Multicast = Mcast_port = 0;
	TftpEndingBlock = -1;
}

#endif	/* CONFIG_MCAST_TFTP */

static __inline__ void
store_block (unsigned block, uchar * src, unsigned len)
{
	ulong offset = block * TftpBlkSize + TftpBlockWrapOffset;
	ulong newsize = offset + len;
#ifdef CFG_DIRECT_FLASH_TFTP
	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 ((char *)src, (ulong)(load_addr+offset), len);
		if (rc) {
			flash_perror (rc);
			NetState = NETLOOP_FAIL;
			return;
		}
	}
	else
#endif /* CFG_DIRECT_FLASH_TFTP */
	{
		(void)memcpy((void *)(load_addr + offset), src, len);
	}
#ifdef CONFIG_MCAST_TFTP
	if (Multicast)
		ext2_set_bit(block, Bitmap);
#endif

	if (NetBootFileXferSize < newsize)
		NetBootFileXferSize = newsize;
}

static void TftpSend (void);
static void TftpTimeout (void);

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

static void
TftpSend (void)
{
	volatile uchar *	pkt;
	volatile uchar *	xp;
	int			len = 0;
	volatile ushort *s;

#ifdef CONFIG_MCAST_TFTP
	/* Multicast TFTP.. non-MasterClients do not ACK data. */
	if (Multicast
	 && (TftpState == STATE_DATA)
	 && (MasterClient == 0))
		return;
#endif
	/*
	 *	We will always be sending some sort of packet, so
	 *	cobble together the packet headers now.
	 */
	pkt = NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE;

	switch (TftpState) {

	case STATE_RRQ:
		xp = pkt;
		s = (ushort *)pkt;
		*s++ = htons(TFTP_RRQ);
		pkt = (uchar *)s;
		strcpy ((char *)pkt, tftp_filename);
		pkt += strlen(tftp_filename) + 1;
		strcpy ((char *)pkt, "octet");
		pkt += 5 /*strlen("octet")*/ + 1;
		strcpy ((char *)pkt, "timeout");
		pkt += 7 /*strlen("timeout")*/ + 1;
		sprintf((char *)pkt, "%d", TIMEOUT);
#ifdef ET_DEBUG
		printf("send option \"timeout %s\"\n", (char *)pkt);
#endif
		pkt += strlen((char *)pkt) + 1;
		/* try for more effic. blk size */
		pkt += sprintf((char *)pkt,"blksize%c%d%c",
				0,TftpBlkSizeOption,0);
#ifdef CONFIG_MCAST_TFTP
		/* Check all preconditions before even trying the option */
		if (!ProhibitMcast
		 && (Bitmap=malloc(Mapsize))
		 && eth_get_dev()->mcast) {
			free(Bitmap);
			Bitmap=NULL;
			pkt += sprintf((char *)pkt,"multicast%c%c",0,0);
		}
#endif /* CONFIG_MCAST_TFTP */
		len = pkt - xp;
		break;

	case STATE_OACK:
#ifdef CONFIG_MCAST_TFTP
		/* My turn!  Start at where I need blocks I missed.*/
		if (Multicast)
			TftpBlock=ext2_find_next_zero_bit(Bitmap,(Mapsize*8),0);
		/*..falling..*/
#endif
	case STATE_DATA:
		xp = pkt;
		s = (ushort *)pkt;
		*s++ = htons(TFTP_ACK);
		*s++ = htons(TftpBlock);
		pkt = (uchar *)s;
		len = pkt - xp;
		break;

	case STATE_TOO_LARGE:
		xp = pkt;
		s = (ushort *)pkt;
		*s++ = htons(TFTP_ERROR);
		*s++ = htons(3);
		pkt = (uchar *)s;
		strcpy ((char *)pkt, "File too large");
		pkt += 14 /*strlen("File too large")*/ + 1;
		len = pkt - xp;
		break;

	case STATE_BAD_MAGIC:
		xp = pkt;
		s = (ushort *)pkt;
		*s++ = htons(TFTP_ERROR);
		*s++ = htons(2);
		pkt = (uchar *)s;
		strcpy ((char *)pkt, "File has bad magic");
		pkt += 18 /*strlen("File has bad magic")*/ + 1;
		len = pkt - xp;
		break;
	}

	NetSendUDPPacket(NetServerEther, NetServerIP, TftpServerPort, TftpOurPort, len);
}


static void
TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
{
	ushort proto;
	ushort *s;
	int i;

	if (dest != TftpOurPort) {
#ifdef CONFIG_MCAST_TFTP
		if (Multicast
		 && (!Mcast_port || (dest != Mcast_port)))
#endif
		return;
	}
	if (TftpState != STATE_RRQ && src != TftpServerPort) {
		return;
	}

	if (len < 2) {
		return;
	}
	len -= 2;
	/* warning: don't use increment (++) in ntohs() macros!! */
	s = (ushort *)pkt;
	proto = *s++;
	pkt = (uchar *)s;
	switch (ntohs(proto)) {

	case TFTP_RRQ:
	case TFTP_WRQ:
	case TFTP_ACK:
		break;
	default:
		break;

	case TFTP_OACK:
#ifdef ET_DEBUG
		printf("Got OACK: %s %s\n", pkt, pkt+strlen(pkt)+1);
#endif
		TftpState = STATE_OACK;
		TftpServerPort = src;
		/*
		 * Check for 'blksize' option.
		 * Careful: "i" is signed, "len" is unsigned, thus
		 * something like "len-8" may give a *huge* number
		 */
		for (i=0; i+8<len; i++) {
			if (strcmp ((char*)pkt+i,"blksize") == 0) {
				TftpBlkSize = (unsigned short)
					simple_strtoul((char*)pkt+i+8,NULL,10);
#ifdef ET_DEBUG
				printf ("Blocksize ack: %s, %d\n",
					(char*)pkt+i+8,TftpBlkSize);
#endif
				break;
			}
		}
#ifdef CONFIG_MCAST_TFTP
		parse_multicast_oack((char *)pkt,len-1);
		if ((Multicast) && (!MasterClient))
			TftpState = STATE_DATA;	/* passive.. */
		else
#endif
		TftpSend (); /* Send ACK */
		break;
	case TFTP_DATA:
		if (len < 2)
			return;
		len -= 2;
		TftpBlock = ntohs(*(ushort *)pkt);

		/*
		 * RFC1350 specifies that the first data packet will
		 * have sequence number 1. If we receive a sequence
		 * number of 0 this means that there was a wrap
		 * around of the (16 bit) counter.
		 */
		if (TftpBlock == 0) {
			TftpBlockWrap++;
			TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE;
			printf ("\n\t %lu MB received\n\t ", TftpBlockWrapOffset>>20);
		} else {
			if (((TftpBlock - 1) % 10) == 0) {
				putc ('#');
			} else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {
				puts ("\n\t ");
			}
		}

#ifdef ET_DEBUG
		if (TftpState == STATE_RRQ) {
			puts ("Server did not acknowledge timeout option!\n");
		}
#endif

		if (TftpState == STATE_RRQ || TftpState == STATE_OACK) {
			/* first block received */
			TftpState = STATE_DATA;
			TftpServerPort = src;
			TftpLastBlock = 0;
			TftpBlockWrap = 0;
			TftpBlockWrapOffset = 0;

#ifdef CONFIG_MCAST_TFTP
			if (Multicast) { /* start!=1 common if mcast */
				TftpLastBlock = TftpBlock - 1;
			} else
#endif
			if (TftpBlock != 1) {	/* Assertion */
				printf ("\nTFTP error: "
					"First block is not block 1 (%ld)\n"
					"Starting again\n\n",
					TftpBlock);
				NetStartAgain ();
				break;
			}
		}

		if (TftpBlock == TftpLastBlock) {
			/*
			 *	Same block again; ignore it.
			 */
			break;
		}

		TftpLastBlock = TftpBlock;
		NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);

		store_block (TftpBlock - 1, pkt + 2, len);

		/*
		 *	Acknoledge the block just received, which will prompt
		 *	the server for the next one.
		 */
#ifdef CONFIG_MCAST_TFTP
		/* if I am the MasterClient, actively calculate what my next
		 * needed block is; else I'm passive; not ACKING
 		 */
		if (Multicast) {
			if (len < TftpBlkSize)  {
				TftpEndingBlock = TftpBlock;
			} else if (MasterClient) {
				TftpBlock = PrevBitmapHole =
					ext2_find_next_zero_bit(
						Bitmap,
						(Mapsize*8),
						PrevBitmapHole);
				if (TftpBlock > ((Mapsize*8) - 1)) {
					printf ("tftpfile too big\n");
					/* try to double it and retry */
					Mapsize<<=1;
					mcast_cleanup();
					NetStartAgain ();
					return;
				}
				TftpLastBlock = TftpBlock;
			}
		}
#endif
		TftpSend ();

#ifdef CONFIG_MCAST_TFTP
		if (Multicast) {
			if (MasterClient && (TftpBlock >= TftpEndingBlock)) {
				puts ("\nMulticast tftp done\n");
				mcast_cleanup();
				NetState = NETLOOP_SUCCESS;
			}
		}
		else
#endif
		if (len < TftpBlkSize) {
			/*
			 *	We received the whole thing.  Try to
			 *	run it.
			 */
			puts ("\ndone\n");
			NetState = NETLOOP_SUCCESS;
		}
		break;

	case TFTP_ERROR:
		printf ("\nTFTP error: '%s' (%d)\n",
					pkt + 2, ntohs(*(ushort *)pkt));
		puts ("Starting again\n\n");
#ifdef CONFIG_MCAST_TFTP
		mcast_cleanup();
#endif
		NetStartAgain ();
		break;
	}
}


static void
TftpTimeout (void)
{
	if (++TftpTimeoutCount > TIMEOUT_COUNT) {
		puts ("\nRetry count exceeded; starting again\n");
#ifdef CONFIG_MCAST_TFTP
		mcast_cleanup();
#endif
		NetStartAgain ();
	} else {
		puts ("T ");
		NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
		TftpSend ();
	}
}


void
TftpStart (void)
{
#ifdef CONFIG_TFTP_PORT
	char *ep;             /* Environment pointer */
#endif

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

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

#if defined(CONFIG_NET_MULTI)
	printf ("Using %s device\n", eth_get_name());
#endif
	puts ("TFTP from server ");	print_IPaddr (NetServerIP);
	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) ;
	    }
	}
	putc ('\n');

	printf ("Filename '%s'.", tftp_filename);

	if (NetBootFileSize) {
		printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
		print_size (NetBootFileSize<<9, "");
	}

	putc ('\n');

	printf ("Load address: 0x%lx\n", load_addr);

	puts ("Loading: *\b");

	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	NetSetHandler (TftpHandler);

	TftpServerPort = WELL_KNOWN_PORT;
	TftpTimeoutCount = 0;
	TftpState = STATE_RRQ;
	/* Use a pseudo-random port unless a specific port is set */
	TftpOurPort = 1024 + (get_timer(0) % 3072);

#ifdef CONFIG_TFTP_PORT
	if ((ep = getenv("tftpdstp")) != NULL) {
		TftpServerPort = simple_strtol(ep, NULL, 10);
	}
	if ((ep = getenv("tftpsrcp")) != NULL) {
		TftpOurPort= simple_strtol(ep, NULL, 10);
	}
#endif
	TftpBlock = 0;

	/* zero out server ether in case the server ip has changed */
	memset(NetServerEther, 0, 6);
	/* Revert TftpBlkSize to dflt */
	TftpBlkSize = TFTP_BLOCK_SIZE;
#ifdef CONFIG_MCAST_TFTP
    	mcast_cleanup();
#endif

	TftpSend ();
}

#ifdef CONFIG_MCAST_TFTP
/* Credits: atftp project.
 */

/* pick up BcastAddr, Port, and whether I am [now] the master-client. *
 * Frame:
 *    +-------+-----------+---+-------~~-------+---+
 *    |  opc  | multicast | 0 | addr, port, mc | 0 |
 *    +-------+-----------+---+-------~~-------+---+
 * The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
 * I am the new master-client so must send ACKs to DataBlocks.  If I am not
 * master-client, I'm a passive client, gathering what DataBlocks I may and
 * making note of which ones I got in my bitmask.
 * In theory, I never go from master->passive..
 * .. this comes in with pkt already pointing just past opc
 */
static void parse_multicast_oack(char *pkt, int len)
{
 int i;
 IPaddr_t addr;
 char *mc_adr, *port,  *mc;

	mc_adr=port=mc=NULL;
	/* march along looking for 'multicast\0', which has to start at least
	 * 14 bytes back from the end.
	 */
	for (i=0;i<len-14;i++)
		if (strcmp (pkt+i,"multicast") == 0)
			break;
	if (i >= (len-14)) /* non-Multicast OACK, ign. */
		return;

	i+=10; /* strlen multicast */
	mc_adr = pkt+i;
	for (;i<len;i++) {
		if (*(pkt+i) == ',') {
			*(pkt+i) = '\0';
			if (port) {
				mc = pkt+i+1;
				break;
			} else {
				port = pkt+i+1;
			}
		}
	}
	if (!port || !mc_adr || !mc ) return;
	if (Multicast && MasterClient) {
		printf ("I got a OACK as master Client, WRONG!\n");
		return;
	}
	/* ..I now accept packets destined for this MCAST addr, port */
	if (!Multicast) {
		if (Bitmap) {
			printf ("Internal failure! no mcast.\n");
			free(Bitmap);
			Bitmap=NULL;
			ProhibitMcast=1;
			return ;
		}
		/* I malloc instead of pre-declare; so that if the file ends
		 * up being too big for this bitmap I can retry
		 */
		if (!(Bitmap = malloc (Mapsize))) {
			printf ("No Bitmap, no multicast. Sorry.\n");
			ProhibitMcast=1;
			return;
		}
		memset (Bitmap,0,Mapsize);
		PrevBitmapHole = 0;
		Multicast = 1;
	}
	addr = string_to_ip(mc_adr);
	if (Mcast_addr != addr) {
		if (Mcast_addr)
			eth_mcast_join(Mcast_addr, 0);
		if (eth_mcast_join(Mcast_addr=addr, 1)) {
			printf ("Fail to set mcast, revert to TFTP\n");
			ProhibitMcast=1;
			mcast_cleanup();
			NetStartAgain();
		}
	}
	MasterClient = (unsigned char)simple_strtoul((char *)mc,NULL,10);
	Mcast_port = (unsigned short)simple_strtoul(port,NULL,10);
	printf ("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient);
	return;
}

#endif /* Multicast TFTP */

#endif
Commit	Line	Data
fe8c2806 WD	1	/*
	2	* Copyright 1994, 1995, 2000 Neil Russell.
	3	* (See License)
	4	* Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, [email protected]
	5	*/
	6
	7	#include <common.h>
	8	#include <command.h>
	9	#include <net.h>
	10	#include "tftp.h"
	11	#include "bootp.h"
	12
	13	#undef ET_DEBUG
	14
643d1ab2	15	#if defined(CONFIG_CMD_NET)
fe8c2806 WD	16
fe8c2806 WD	17	#define WELL_KNOWN_PORT 69 /* Well known TFTP port # */
fbe4b5cb	18	#define TIMEOUT 5 /* Seconds to timeout for a lost pkt */
fe8c2806 WD	19	#ifndef CONFIG_NET_RETRY_COUNT
	20	# define TIMEOUT_COUNT 10 /* # of timeouts before giving up */
	21	#else
	22	# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2)
	23	#endif
	24	/* (for checking the image size) */
	25	#define HASHES_PER_LINE 65 /* Number of "loading" hashes per line */
	26
	27	/*
	28	* TFTP operations.
	29	*/
	30	#define TFTP_RRQ 1
	31	#define TFTP_WRQ 2
	32	#define TFTP_DATA 3
	33	#define TFTP_ACK 4
	34	#define TFTP_ERROR 5
fbe4b5cb	35	#define TFTP_OACK 6
fe8c2806 WD	36
	37
	38	static int TftpServerPort; /* The UDP port at their end */
	39	static int TftpOurPort; /* The UDP port at our end */
	40	static int TftpTimeoutCount;
3f85ce27 WD	41	static ulong TftpBlock; /* packet sequence number */
	42	static ulong TftpLastBlock; /* last packet sequence number received */
	43	static ulong TftpBlockWrap; /* count of sequence number wraparounds */
	44	static ulong TftpBlockWrapOffset; /* memory offset due to wrapping */
fe8c2806	45	static int TftpState;
3f85ce27	46
fe8c2806 WD	47	#define STATE_RRQ 1
	48	#define STATE_DATA 2
	49	#define STATE_TOO_LARGE 3
	50	#define STATE_BAD_MAGIC 4
fbe4b5cb	51	#define STATE_OACK 5
fe8c2806	52
3f85ce27 WD	53	#define TFTP_BLOCK_SIZE 512 /* default TFTP block size */
	54	#define TFTP_SEQUENCE_SIZE ((ulong)(1<<16)) /* sequence number is 16 bit */
	55
fe8c2806 WD	56	#define DEFAULT_NAME_LEN (8 + 4 + 1)
	57	static char default_filename[DEFAULT_NAME_LEN];
	58	static char *tftp_filename;
	59
	60	#ifdef CFG_DIRECT_FLASH_TFTP
e6f2e902	61	extern flash_info_t flash_info[];
fe8c2806 WD	62	#endif
fe8c2806 WD	63
85eb5caf WD	64	/* 512 is poor choice for ethernet, MTU is typically 1500.
85eb5caf WD	65	* Minus eth.hdrs thats 1468. Can get 2x better throughput with
53a5c424 DU	66	* almost-MTU block sizes. At least try... fall back to 512 if need be.
	67	*/
	68	#define TFTP_MTU_BLOCKSIZE 1468
	69	static unsigned short TftpBlkSize=TFTP_BLOCK_SIZE;
	70	static unsigned short TftpBlkSizeOption=TFTP_MTU_BLOCKSIZE;
	71
	72	#ifdef CONFIG_MCAST_TFTP
	73	#include <malloc.h>
	74	#define MTFTP_BITMAPSIZE 0x1000
	75	static unsigned *Bitmap;
	76	static int PrevBitmapHole,Mapsize=MTFTP_BITMAPSIZE;
	77	static uchar ProhibitMcast=0, MasterClient=0;
	78	static uchar Multicast=0;
	79	extern IPaddr_t Mcast_addr;
	80	static int Mcast_port;
	81	static ulong TftpEndingBlock; /* can get 'last' block before done..*/
	82
	83	static void parse_multicast_oack(char *pkt,int len);
	84
	85	static void
	86	mcast_cleanup(void)
	87	{
	88	if (Mcast_addr) eth_mcast_join(Mcast_addr, 0);
	89	if (Bitmap) free(Bitmap);
	90	Bitmap=NULL;
	91	Mcast_addr = Multicast = Mcast_port = 0;
	92	TftpEndingBlock = -1;
	93	}
	94
	95	#endif /* CONFIG_MCAST_TFTP */
	96
fe8c2806 WD	97	static __inline__ void
	98	store_block (unsigned block, uchar * src, unsigned len)
	99	{
53a5c424	100	ulong offset = block * TftpBlkSize + TftpBlockWrapOffset;
3f85ce27	101	ulong newsize = offset + len;
fe8c2806 WD	102	#ifdef CFG_DIRECT_FLASH_TFTP
	103	int i, rc = 0;
	104
	105	for (i=0; i<CFG_MAX_FLASH_BANKS; i++) {
	106	/* start address in flash? */
	107	if (load_addr + offset >= flash_info[i].start[0]) {
	108	rc = 1;
	109	break;
	110	}
	111	}
	112
	113	if (rc) { /* Flash is destination for this packet */
77ddac94	114	rc = flash_write ((char *)src, (ulong)(load_addr+offset), len);
fe8c2806 WD	115	if (rc) {
	116	flash_perror (rc);
	117	NetState = NETLOOP_FAIL;
	118	return;
	119	}
	120	}
	121	else
	122	#endif /* CFG_DIRECT_FLASH_TFTP */
	123	{
	124	(void)memcpy((void *)(load_addr + offset), src, len);
	125	}
53a5c424 DU	126	#ifdef CONFIG_MCAST_TFTP
	127	if (Multicast)
	128	ext2_set_bit(block, Bitmap);
	129	#endif
fe8c2806 WD	130
	131	if (NetBootFileXferSize < newsize)
	132	NetBootFileXferSize = newsize;
	133	}
	134
	135	static void TftpSend (void);
	136	static void TftpTimeout (void);
	137
	138	/**********************************************************************/
	139
	140	static void
	141	TftpSend (void)
	142	{
	143	volatile uchar * pkt;
	144	volatile uchar * xp;
	145	int len = 0;
7bc5ee07	146	volatile ushort *s;
fe8c2806	147
85eb5caf	148	#ifdef CONFIG_MCAST_TFTP
53a5c424	149	/* Multicast TFTP.. non-MasterClients do not ACK data. */
85eb5caf WD	150	if (Multicast
	151	&& (TftpState == STATE_DATA)
	152	&& (MasterClient == 0))
53a5c424 DU	153	return;
53a5c424 DU	154	#endif
fe8c2806 WD	155	/*
	156	* We will always be sending some sort of packet, so
	157	* cobble together the packet headers now.
	158	*/
a3d991bd	159	pkt = NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE;
fe8c2806 WD	160
	161	switch (TftpState) {
	162
	163	case STATE_RRQ:
	164	xp = pkt;
7bc5ee07 WD	165	s = (ushort *)pkt;
	166	*s++ = htons(TFTP_RRQ);
	167	pkt = (uchar *)s;
fe8c2806 WD	168	strcpy ((char *)pkt, tftp_filename);
	169	pkt += strlen(tftp_filename) + 1;
	170	strcpy ((char *)pkt, "octet");
	171	pkt += 5 /strlen("octet")/ + 1;
fbe4b5cb WD	172	strcpy ((char *)pkt, "timeout");
	173	pkt += 7 /strlen("timeout")/ + 1;
	174	sprintf((char *)pkt, "%d", TIMEOUT);
	175	#ifdef ET_DEBUG
	176	printf("send option \"timeout %s\"\n", (char *)pkt);
	177	#endif
	178	pkt += strlen((char *)pkt) + 1;
53a5c424 DU	179	/* try for more effic. blk size */
53a5c424 DU	180	pkt += sprintf((char *)pkt,"blksize%c%d%c",
ef8f2075	181	0,TftpBlkSizeOption,0);
85eb5caf	182	#ifdef CONFIG_MCAST_TFTP
53a5c424	183	/* Check all preconditions before even trying the option */
85eb5caf WD	184	if (!ProhibitMcast
85eb5caf WD	185	&& (Bitmap=malloc(Mapsize))
53a5c424 DU	186	&& eth_get_dev()->mcast) {
	187	free(Bitmap);
	188	Bitmap=NULL;
	189	pkt += sprintf((char *)pkt,"multicast%c%c",0,0);
	190	}
	191	#endif /* CONFIG_MCAST_TFTP */
fe8c2806 WD	192	len = pkt - xp;
	193	break;
	194
fbe4b5cb	195	case STATE_OACK:
53a5c424 DU	196	#ifdef CONFIG_MCAST_TFTP
	197	/* My turn! Start at where I need blocks I missed.*/
	198	if (Multicast)
	199	TftpBlock=ext2_find_next_zero_bit(Bitmap,(Mapsize*8),0);
	200	/..falling../
	201	#endif
	202	case STATE_DATA:
fe8c2806	203	xp = pkt;
7bc5ee07 WD	204	s = (ushort *)pkt;
	205	*s++ = htons(TFTP_ACK);
	206	*s++ = htons(TftpBlock);
	207	pkt = (uchar *)s;
fe8c2806 WD	208	len = pkt - xp;
	209	break;
	210
	211	case STATE_TOO_LARGE:
	212	xp = pkt;
7bc5ee07 WD	213	s = (ushort *)pkt;
	214	*s++ = htons(TFTP_ERROR);
	215	*s++ = htons(3);
	216	pkt = (uchar *)s;
fe8c2806 WD	217	strcpy ((char *)pkt, "File too large");
	218	pkt += 14 /strlen("File too large")/ + 1;
	219	len = pkt - xp;
	220	break;
	221
	222	case STATE_BAD_MAGIC:
	223	xp = pkt;
7bc5ee07 WD	224	s = (ushort *)pkt;
	225	*s++ = htons(TFTP_ERROR);
	226	*s++ = htons(2);
	227	pkt = (uchar *)s;
fe8c2806 WD	228	strcpy ((char *)pkt, "File has bad magic");
	229	pkt += 18 /strlen("File has bad magic")/ + 1;
	230	len = pkt - xp;
	231	break;
	232	}
	233
73a8b27c	234	NetSendUDPPacket(NetServerEther, NetServerIP, TftpServerPort, TftpOurPort, len);
fe8c2806 WD	235	}
	236
	237
	238	static void
	239	TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
	240	{
	241	ushort proto;
7bc5ee07	242	ushort *s;
ff13ac8c	243	int i;
fe8c2806 WD	244
fe8c2806 WD	245	if (dest != TftpOurPort) {
53a5c424	246	#ifdef CONFIG_MCAST_TFTP
85eb5caf	247	if (Multicast
53a5c424 DU	248	&& (!Mcast_port \|\| (dest != Mcast_port)))
53a5c424 DU	249	#endif
fe8c2806 WD	250	return;
	251	}
	252	if (TftpState != STATE_RRQ && src != TftpServerPort) {
	253	return;
	254	}
	255
	256	if (len < 2) {
	257	return;
	258	}
	259	len -= 2;
	260	/* warning: don't use increment (++) in ntohs() macros!! */
7bc5ee07 WD	261	s = (ushort *)pkt;
	262	proto = *s++;
	263	pkt = (uchar *)s;
fe8c2806 WD	264	switch (ntohs(proto)) {
	265
	266	case TFTP_RRQ:
	267	case TFTP_WRQ:
	268	case TFTP_ACK:
	269	break;
	270	default:
	271	break;
	272
fbe4b5cb WD	273	case TFTP_OACK:
fbe4b5cb WD	274	#ifdef ET_DEBUG
ff13ac8c	275	printf("Got OACK: %s %s\n", pkt, pkt+strlen(pkt)+1);
fbe4b5cb WD	276	#endif
	277	TftpState = STATE_OACK;
	278	TftpServerPort = src;
60174746 WD	279	/*
	280	* Check for 'blksize' option.
	281	* Careful: "i" is signed, "len" is unsigned, thus
	282	* something like "len-8" may give a huge number
	283	*/
	284	for (i=0; i+8<len; i++) {
ff13ac8c WD	285	if (strcmp ((char*)pkt+i,"blksize") == 0) {
	286	TftpBlkSize = (unsigned short)
	287	simple_strtoul((char*)pkt+i+8,NULL,10);
53a5c424	288	#ifdef ET_DEBUG
ff13ac8c WD	289	printf ("Blocksize ack: %s, %d\n",
ff13ac8c WD	290	(char*)pkt+i+8,TftpBlkSize);
53a5c424	291	#endif
ff13ac8c WD	292	break;
ff13ac8c WD	293	}
53a5c424 DU	294	}
	295	#ifdef CONFIG_MCAST_TFTP
	296	parse_multicast_oack((char *)pkt,len-1);
85eb5caf	297	if ((Multicast) && (!MasterClient))
53a5c424 DU	298	TftpState = STATE_DATA; /* passive.. */
	299	else
	300	#endif
fbe4b5cb WD	301	TftpSend (); /* Send ACK */
fbe4b5cb WD	302	break;
fe8c2806 WD	303	case TFTP_DATA:
	304	if (len < 2)
	305	return;
	306	len -= 2;
	307	TftpBlock = ntohs((ushort )pkt);
3f85ce27 WD	308
3f85ce27 WD	309	/*
cd0a9de6 WD	310	* RFC1350 specifies that the first data packet will
	311	* have sequence number 1. If we receive a sequence
	312	* number of 0 this means that there was a wrap
	313	* around of the (16 bit) counter.
3f85ce27 WD	314	*/
	315	if (TftpBlock == 0) {
	316	TftpBlockWrap++;
53a5c424	317	TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE;
ddd5d9da	318	printf ("\n\t %lu MB received\n\t ", TftpBlockWrapOffset>>20);
3f85ce27 WD	319	} else {
	320	if (((TftpBlock - 1) % 10) == 0) {
	321	putc ('#');
	322	} else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {
	323	puts ("\n\t ");
	324	}
fe8c2806 WD	325	}
fe8c2806 WD	326
fbe4b5cb	327	#ifdef ET_DEBUG
fe8c2806	328	if (TftpState == STATE_RRQ) {
4b9206ed	329	puts ("Server did not acknowledge timeout option!\n");
fbe4b5cb WD	330	}
	331	#endif
	332
	333	if (TftpState == STATE_RRQ \|\| TftpState == STATE_OACK) {
3f85ce27	334	/* first block received */
fe8c2806 WD	335	TftpState = STATE_DATA;
	336	TftpServerPort = src;
	337	TftpLastBlock = 0;
3f85ce27 WD	338	TftpBlockWrap = 0;
3f85ce27 WD	339	TftpBlockWrapOffset = 0;
fe8c2806	340
53a5c424 DU	341	#ifdef CONFIG_MCAST_TFTP
	342	if (Multicast) { /* start!=1 common if mcast */
	343	TftpLastBlock = TftpBlock - 1;
	344	} else
	345	#endif
fe8c2806 WD	346	if (TftpBlock != 1) { /* Assertion */
fe8c2806 WD	347	printf ("\nTFTP error: "
3f85ce27	348	"First block is not block 1 (%ld)\n"
fe8c2806 WD	349	"Starting again\n\n",
	350	TftpBlock);
	351	NetStartAgain ();
	352	break;
	353	}
	354	}
	355
	356	if (TftpBlock == TftpLastBlock) {
	357	/*
	358	* Same block again; ignore it.
	359	*/
	360	break;
	361	}
	362
	363	TftpLastBlock = TftpBlock;
	364	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	365
	366	store_block (TftpBlock - 1, pkt + 2, len);
	367
	368	/*
	369	* Acknoledge the block just received, which will prompt
	370	* the server for the next one.
	371	*/
53a5c424	372	#ifdef CONFIG_MCAST_TFTP
85eb5caf WD	373	/* if I am the MasterClient, actively calculate what my next
85eb5caf WD	374	* needed block is; else I'm passive; not ACKING
53a5c424 DU	375	*/
	376	if (Multicast) {
	377	if (len < TftpBlkSize) {
	378	TftpEndingBlock = TftpBlock;
	379	} else if (MasterClient) {
85eb5caf	380	TftpBlock = PrevBitmapHole =
53a5c424 DU	381	ext2_find_next_zero_bit(
	382	Bitmap,
	383	(Mapsize*8),
	384	PrevBitmapHole);
	385	if (TftpBlock > ((Mapsize*8) - 1)) {
	386	printf ("tftpfile too big\n");
	387	/* try to double it and retry */
	388	Mapsize<<=1;
	389	mcast_cleanup();
	390	NetStartAgain ();
	391	return;
	392	}
	393	TftpLastBlock = TftpBlock;
	394	}
	395	}
	396	#endif
fe8c2806 WD	397	TftpSend ();
fe8c2806 WD	398
53a5c424 DU	399	#ifdef CONFIG_MCAST_TFTP
	400	if (Multicast) {
	401	if (MasterClient && (TftpBlock >= TftpEndingBlock)) {
	402	puts ("\nMulticast tftp done\n");
	403	mcast_cleanup();
	404	NetState = NETLOOP_SUCCESS;
85eb5caf	405	}
53a5c424 DU	406	}
	407	else
	408	#endif
	409	if (len < TftpBlkSize) {
fe8c2806 WD	410	/*
	411	* We received the whole thing. Try to
	412	* run it.
	413	*/
	414	puts ("\ndone\n");
	415	NetState = NETLOOP_SUCCESS;
	416	}
	417	break;
	418
	419	case TFTP_ERROR:
	420	printf ("\nTFTP error: '%s' (%d)\n",
	421	pkt + 2, ntohs((ushort )pkt));
	422	puts ("Starting again\n\n");
53a5c424 DU	423	#ifdef CONFIG_MCAST_TFTP
	424	mcast_cleanup();
	425	#endif
fe8c2806 WD	426	NetStartAgain ();
	427	break;
	428	}
	429	}
	430
	431
	432	static void
	433	TftpTimeout (void)
	434	{
e0ac62d7	435	if (++TftpTimeoutCount > TIMEOUT_COUNT) {
fe8c2806	436	puts ("\nRetry count exceeded; starting again\n");
53a5c424 DU	437	#ifdef CONFIG_MCAST_TFTP
	438	mcast_cleanup();
	439	#endif
fe8c2806 WD	440	NetStartAgain ();
	441	} else {
	442	puts ("T ");
	443	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	444	TftpSend ();
	445	}
	446	}
	447
	448
	449	void
	450	TftpStart (void)
	451	{
ecb0ccd9 WD	452	#ifdef CONFIG_TFTP_PORT
	453	char ep; / Environment pointer */
	454	#endif
	455
fe8c2806	456	if (BootFile[0] == '\0') {
fe8c2806	457	sprintf(default_filename, "%02lX%02lX%02lX%02lX.img",
c43352cc WD	458	NetOurIP & 0xFF,
	459	(NetOurIP >> 8) & 0xFF,
	460	(NetOurIP >> 16) & 0xFF,
	461	(NetOurIP >> 24) & 0xFF );
fe8c2806 WD	462	tftp_filename = default_filename;
	463
	464	printf ("*** Warning: no boot file name; using '%s'\n",
	465	tftp_filename);
	466	} else {
	467	tftp_filename = BootFile;
	468	}
	469
5bb226e8 WD	470	#if defined(CONFIG_NET_MULTI)
	471	printf ("Using %s device\n", eth_get_name());
	472	#endif
fe8c2806 WD	473	puts ("TFTP from server "); print_IPaddr (NetServerIP);
	474	puts ("; our IP address is "); print_IPaddr (NetOurIP);
	475
	476	/* Check if we need to send across this subnet */
	477	if (NetOurGatewayIP && NetOurSubnetMask) {
	478	IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
	479	IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask;
	480
	481	if (OurNet != ServerNet) {
	482	puts ("; sending through gateway ");
	483	print_IPaddr (NetOurGatewayIP) ;
	484	}
	485	}
	486	putc ('\n');
	487
	488	printf ("Filename '%s'.", tftp_filename);
	489
	490	if (NetBootFileSize) {
	491	printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
	492	print_size (NetBootFileSize<<9, "");
	493	}
	494
	495	putc ('\n');
	496
	497	printf ("Load address: 0x%lx\n", load_addr);
	498
	499	puts ("Loading: *\b");
	500
	501	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	502	NetSetHandler (TftpHandler);
	503
	504	TftpServerPort = WELL_KNOWN_PORT;
	505	TftpTimeoutCount = 0;
	506	TftpState = STATE_RRQ;
ecb0ccd9	507	/* Use a pseudo-random port unless a specific port is set */
fe8c2806	508	TftpOurPort = 1024 + (get_timer(0) % 3072);
53a5c424	509
ecb0ccd9	510	#ifdef CONFIG_TFTP_PORT
28cb9375 WD	511	if ((ep = getenv("tftpdstp")) != NULL) {
	512	TftpServerPort = simple_strtol(ep, NULL, 10);
	513	}
	514	if ((ep = getenv("tftpsrcp")) != NULL) {
ecb0ccd9 WD	515	TftpOurPort= simple_strtol(ep, NULL, 10);
	516	}
	517	#endif
fbe4b5cb	518	TftpBlock = 0;
fe8c2806	519
73a8b27c WD	520	/* zero out server ether in case the server ip has changed */
73a8b27c WD	521	memset(NetServerEther, 0, 6);
53a5c424 DU	522	/* Revert TftpBlkSize to dflt */
	523	TftpBlkSize = TFTP_BLOCK_SIZE;
	524	#ifdef CONFIG_MCAST_TFTP
	525	mcast_cleanup();
	526	#endif
73a8b27c	527
fe8c2806 WD	528	TftpSend ();
	529	}
	530
53a5c424 DU	531	#ifdef CONFIG_MCAST_TFTP
	532	/* Credits: atftp project.
	533	*/
	534
	535	/* pick up BcastAddr, Port, and whether I am [now] the master-client. *
	536	* Frame:
	537	* +-------+-----------+---+-------~~-------+---+
	538	* \| opc \| multicast \| 0 \| addr, port, mc \| 0 \|
	539	* +-------+-----------+---+-------~~-------+---+
	540	* The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
	541	* I am the new master-client so must send ACKs to DataBlocks. If I am not
	542	* master-client, I'm a passive client, gathering what DataBlocks I may and
	543	* making note of which ones I got in my bitmask.
	544	* In theory, I never go from master->passive..
	545	* .. this comes in with pkt already pointing just past opc
	546	*/
	547	static void parse_multicast_oack(char *pkt, int len)
	548	{
	549	int i;
	550	IPaddr_t addr;
	551	char mc_adr, port, *mc;
	552
	553	mc_adr=port=mc=NULL;
	554	/* march along looking for 'multicast\0', which has to start at least
	555	* 14 bytes back from the end.
	556	*/
	557	for (i=0;i<len-14;i++)
	558	if (strcmp (pkt+i,"multicast") == 0)
	559	break;
	560	if (i >= (len-14)) /* non-Multicast OACK, ign. */
	561	return;
85eb5caf	562
53a5c424 DU	563	i+=10; /* strlen multicast */
	564	mc_adr = pkt+i;
	565	for (;i<len;i++) {
	566	if (*(pkt+i) == ',') {
	567	*(pkt+i) = '\0';
	568	if (port) {
	569	mc = pkt+i+1;
	570	break;
	571	} else {
	572	port = pkt+i+1;
	573	}
	574	}
	575	}
	576	if (!port \|\| !mc_adr \|\| !mc ) return;
	577	if (Multicast && MasterClient) {
	578	printf ("I got a OACK as master Client, WRONG!\n");
	579	return;
	580	}
	581	/* ..I now accept packets destined for this MCAST addr, port */
	582	if (!Multicast) {
	583	if (Bitmap) {
	584	printf ("Internal failure! no mcast.\n");
	585	free(Bitmap);
	586	Bitmap=NULL;
	587	ProhibitMcast=1;
	588	return ;
	589	}
	590	/* I malloc instead of pre-declare; so that if the file ends
85eb5caf WD	591	* up being too big for this bitmap I can retry
85eb5caf WD	592	*/
53a5c424 DU	593	if (!(Bitmap = malloc (Mapsize))) {
	594	printf ("No Bitmap, no multicast. Sorry.\n");
	595	ProhibitMcast=1;
	596	return;
	597	}
	598	memset (Bitmap,0,Mapsize);
	599	PrevBitmapHole = 0;
	600	Multicast = 1;
	601	}
	602	addr = string_to_ip(mc_adr);
	603	if (Mcast_addr != addr) {
	604	if (Mcast_addr)
	605	eth_mcast_join(Mcast_addr, 0);
	606	if (eth_mcast_join(Mcast_addr=addr, 1)) {
	607	printf ("Fail to set mcast, revert to TFTP\n");
	608	ProhibitMcast=1;
	609	mcast_cleanup();
	610	NetStartAgain();
	611	}
	612	}
	613	MasterClient = (unsigned char)simple_strtoul((char *)mc,NULL,10);
	614	Mcast_port = (unsigned short)simple_strtoul(port,NULL,10);
	615	printf ("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient);
	616	return;
	617	}
	618
	619	#endif /* Multicast TFTP */
	620
30b52df9	621	#endif