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

/*
 *	Copyright 1994, 1995, 2000 Neil Russell.
 *	(See License)
 *	Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, wd@denx.de
 */

#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)
{
	char * blksize;
	ushort proto;
	ushort *s;

	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:\n");
		print_buffer (0, pkt, 1, len, 16);
#endif
		TftpState = STATE_OACK;
		TftpServerPort = src;

		/* Check for 'blksize' option */
		pkt[len] = 0; /* NULL terminate so string ops work */
		blksize = strstr((char*)pkt, "blksize");
		if ((blksize) && (blksize + 8 < (char*)pkt + len)) {
			TftpBlkSize = simple_strtoul(blksize + 8, NULL, 10);
#ifdef ET_DEBUG
			printf("Blocksize ack: %d\n", TftpBlkSize);
#endif
		}

#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, wd@denx.de
	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	{
8f1bc284	241	char * blksize;
fe8c2806	242	ushort proto;
7bc5ee07	243	ushort *s;
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
8f1bc284 GL	275	printf("Got OACK:\n");
8f1bc284 GL	276	print_buffer (0, pkt, 1, len, 16);
fbe4b5cb WD	277	#endif
	278	TftpState = STATE_OACK;
	279	TftpServerPort = src;
8f1bc284	280
53a5c424	281	/* Check for 'blksize' option */
8f1bc284 GL	282	pkt[len] = 0; /* NULL terminate so string ops work */
	283	blksize = strstr((char*)pkt, "blksize");
	284	if ((blksize) && (blksize + 8 < (char*)pkt + len)) {
	285	TftpBlkSize = simple_strtoul(blksize + 8, NULL, 10);
53a5c424	286	#ifdef ET_DEBUG
8f1bc284	287	printf("Blocksize ack: %d\n", TftpBlkSize);
53a5c424	288	#endif
53a5c424	289	}
8f1bc284	290
53a5c424 DU	291	#ifdef CONFIG_MCAST_TFTP
53a5c424 DU	292	parse_multicast_oack((char *)pkt,len-1);
85eb5caf	293	if ((Multicast) && (!MasterClient))
53a5c424 DU	294	TftpState = STATE_DATA; /* passive.. */
	295	else
	296	#endif
fbe4b5cb WD	297	TftpSend (); /* Send ACK */
fbe4b5cb WD	298	break;
fe8c2806 WD	299	case TFTP_DATA:
	300	if (len < 2)
	301	return;
	302	len -= 2;
	303	TftpBlock = ntohs((ushort )pkt);
3f85ce27 WD	304
3f85ce27 WD	305	/*
cd0a9de6 WD	306	* RFC1350 specifies that the first data packet will
	307	* have sequence number 1. If we receive a sequence
	308	* number of 0 this means that there was a wrap
	309	* around of the (16 bit) counter.
3f85ce27 WD	310	*/
	311	if (TftpBlock == 0) {
	312	TftpBlockWrap++;
53a5c424	313	TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE;
ddd5d9da	314	printf ("\n\t %lu MB received\n\t ", TftpBlockWrapOffset>>20);
3f85ce27 WD	315	} else {
	316	if (((TftpBlock - 1) % 10) == 0) {
	317	putc ('#');
	318	} else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {
	319	puts ("\n\t ");
	320	}
fe8c2806 WD	321	}
fe8c2806 WD	322
fbe4b5cb	323	#ifdef ET_DEBUG
fe8c2806	324	if (TftpState == STATE_RRQ) {
4b9206ed	325	puts ("Server did not acknowledge timeout option!\n");
fbe4b5cb WD	326	}
	327	#endif
	328
	329	if (TftpState == STATE_RRQ \|\| TftpState == STATE_OACK) {
3f85ce27	330	/* first block received */
fe8c2806 WD	331	TftpState = STATE_DATA;
	332	TftpServerPort = src;
	333	TftpLastBlock = 0;
3f85ce27 WD	334	TftpBlockWrap = 0;
3f85ce27 WD	335	TftpBlockWrapOffset = 0;
fe8c2806	336
53a5c424 DU	337	#ifdef CONFIG_MCAST_TFTP
	338	if (Multicast) { /* start!=1 common if mcast */
	339	TftpLastBlock = TftpBlock - 1;
	340	} else
	341	#endif
fe8c2806 WD	342	if (TftpBlock != 1) { /* Assertion */
fe8c2806 WD	343	printf ("\nTFTP error: "
3f85ce27	344	"First block is not block 1 (%ld)\n"
fe8c2806 WD	345	"Starting again\n\n",
	346	TftpBlock);
	347	NetStartAgain ();
	348	break;
	349	}
	350	}
	351
	352	if (TftpBlock == TftpLastBlock) {
	353	/*
	354	* Same block again; ignore it.
	355	*/
	356	break;
	357	}
	358
	359	TftpLastBlock = TftpBlock;
	360	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	361
	362	store_block (TftpBlock - 1, pkt + 2, len);
	363
	364	/*
	365	* Acknoledge the block just received, which will prompt
	366	* the server for the next one.
	367	*/
53a5c424	368	#ifdef CONFIG_MCAST_TFTP
85eb5caf WD	369	/* if I am the MasterClient, actively calculate what my next
85eb5caf WD	370	* needed block is; else I'm passive; not ACKING
53a5c424 DU	371	*/
	372	if (Multicast) {
	373	if (len < TftpBlkSize) {
	374	TftpEndingBlock = TftpBlock;
	375	} else if (MasterClient) {
85eb5caf	376	TftpBlock = PrevBitmapHole =
53a5c424 DU	377	ext2_find_next_zero_bit(
	378	Bitmap,
	379	(Mapsize*8),
	380	PrevBitmapHole);
	381	if (TftpBlock > ((Mapsize*8) - 1)) {
	382	printf ("tftpfile too big\n");
	383	/* try to double it and retry */
	384	Mapsize<<=1;
	385	mcast_cleanup();
	386	NetStartAgain ();
	387	return;
	388	}
	389	TftpLastBlock = TftpBlock;
	390	}
	391	}
	392	#endif
fe8c2806 WD	393	TftpSend ();
fe8c2806 WD	394
53a5c424 DU	395	#ifdef CONFIG_MCAST_TFTP
	396	if (Multicast) {
	397	if (MasterClient && (TftpBlock >= TftpEndingBlock)) {
	398	puts ("\nMulticast tftp done\n");
	399	mcast_cleanup();
	400	NetState = NETLOOP_SUCCESS;
85eb5caf	401	}
53a5c424 DU	402	}
	403	else
	404	#endif
	405	if (len < TftpBlkSize) {
fe8c2806 WD	406	/*
	407	* We received the whole thing. Try to
	408	* run it.
	409	*/
	410	puts ("\ndone\n");
	411	NetState = NETLOOP_SUCCESS;
	412	}
	413	break;
	414
	415	case TFTP_ERROR:
	416	printf ("\nTFTP error: '%s' (%d)\n",
	417	pkt + 2, ntohs((ushort )pkt));
	418	puts ("Starting again\n\n");
53a5c424 DU	419	#ifdef CONFIG_MCAST_TFTP
	420	mcast_cleanup();
	421	#endif
fe8c2806 WD	422	NetStartAgain ();
	423	break;
	424	}
	425	}
	426
	427
	428	static void
	429	TftpTimeout (void)
	430	{
e0ac62d7	431	if (++TftpTimeoutCount > TIMEOUT_COUNT) {
fe8c2806	432	puts ("\nRetry count exceeded; starting again\n");
53a5c424 DU	433	#ifdef CONFIG_MCAST_TFTP
	434	mcast_cleanup();
	435	#endif
fe8c2806 WD	436	NetStartAgain ();
	437	} else {
	438	puts ("T ");
	439	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	440	TftpSend ();
	441	}
	442	}
	443
	444
	445	void
	446	TftpStart (void)
	447	{
ecb0ccd9 WD	448	#ifdef CONFIG_TFTP_PORT
	449	char ep; / Environment pointer */
	450	#endif
	451
fe8c2806	452	if (BootFile[0] == '\0') {
fe8c2806	453	sprintf(default_filename, "%02lX%02lX%02lX%02lX.img",
c43352cc WD	454	NetOurIP & 0xFF,
	455	(NetOurIP >> 8) & 0xFF,
	456	(NetOurIP >> 16) & 0xFF,
	457	(NetOurIP >> 24) & 0xFF );
fe8c2806 WD	458	tftp_filename = default_filename;
	459
	460	printf ("*** Warning: no boot file name; using '%s'\n",
	461	tftp_filename);
	462	} else {
	463	tftp_filename = BootFile;
	464	}
	465
5bb226e8 WD	466	#if defined(CONFIG_NET_MULTI)
	467	printf ("Using %s device\n", eth_get_name());
	468	#endif
fe8c2806 WD	469	puts ("TFTP from server "); print_IPaddr (NetServerIP);
	470	puts ("; our IP address is "); print_IPaddr (NetOurIP);
	471
	472	/* Check if we need to send across this subnet */
	473	if (NetOurGatewayIP && NetOurSubnetMask) {
	474	IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
	475	IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask;
	476
	477	if (OurNet != ServerNet) {
	478	puts ("; sending through gateway ");
	479	print_IPaddr (NetOurGatewayIP) ;
	480	}
	481	}
	482	putc ('\n');
	483
	484	printf ("Filename '%s'.", tftp_filename);
	485
	486	if (NetBootFileSize) {
	487	printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
	488	print_size (NetBootFileSize<<9, "");
	489	}
	490
	491	putc ('\n');
	492
	493	printf ("Load address: 0x%lx\n", load_addr);
	494
	495	puts ("Loading: *\b");
	496
	497	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	498	NetSetHandler (TftpHandler);
	499
	500	TftpServerPort = WELL_KNOWN_PORT;
	501	TftpTimeoutCount = 0;
	502	TftpState = STATE_RRQ;
ecb0ccd9	503	/* Use a pseudo-random port unless a specific port is set */
fe8c2806	504	TftpOurPort = 1024 + (get_timer(0) % 3072);
53a5c424	505
ecb0ccd9	506	#ifdef CONFIG_TFTP_PORT
28cb9375 WD	507	if ((ep = getenv("tftpdstp")) != NULL) {
	508	TftpServerPort = simple_strtol(ep, NULL, 10);
	509	}
	510	if ((ep = getenv("tftpsrcp")) != NULL) {
ecb0ccd9 WD	511	TftpOurPort= simple_strtol(ep, NULL, 10);
	512	}
	513	#endif
fbe4b5cb	514	TftpBlock = 0;
fe8c2806	515
73a8b27c WD	516	/* zero out server ether in case the server ip has changed */
73a8b27c WD	517	memset(NetServerEther, 0, 6);
53a5c424 DU	518	/* Revert TftpBlkSize to dflt */
	519	TftpBlkSize = TFTP_BLOCK_SIZE;
	520	#ifdef CONFIG_MCAST_TFTP
	521	mcast_cleanup();
	522	#endif
73a8b27c	523
fe8c2806 WD	524	TftpSend ();
	525	}
	526
53a5c424 DU	527	#ifdef CONFIG_MCAST_TFTP
	528	/* Credits: atftp project.
	529	*/
	530
	531	/* pick up BcastAddr, Port, and whether I am [now] the master-client. *
	532	* Frame:
	533	* +-------+-----------+---+-------~~-------+---+
	534	* \| opc \| multicast \| 0 \| addr, port, mc \| 0 \|
	535	* +-------+-----------+---+-------~~-------+---+
	536	* The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
	537	* I am the new master-client so must send ACKs to DataBlocks. If I am not
	538	* master-client, I'm a passive client, gathering what DataBlocks I may and
	539	* making note of which ones I got in my bitmask.
	540	* In theory, I never go from master->passive..
	541	* .. this comes in with pkt already pointing just past opc
	542	*/
	543	static void parse_multicast_oack(char *pkt, int len)
	544	{
	545	int i;
	546	IPaddr_t addr;
	547	char mc_adr, port, *mc;
	548
	549	mc_adr=port=mc=NULL;
	550	/* march along looking for 'multicast\0', which has to start at least
	551	* 14 bytes back from the end.
	552	*/
	553	for (i=0;i<len-14;i++)
	554	if (strcmp (pkt+i,"multicast") == 0)
	555	break;
	556	if (i >= (len-14)) /* non-Multicast OACK, ign. */
	557	return;
85eb5caf	558
53a5c424 DU	559	i+=10; /* strlen multicast */
	560	mc_adr = pkt+i;
	561	for (;i<len;i++) {
	562	if (*(pkt+i) == ',') {
	563	*(pkt+i) = '\0';
	564	if (port) {
	565	mc = pkt+i+1;
	566	break;
	567	} else {
	568	port = pkt+i+1;
	569	}
	570	}
	571	}
	572	if (!port \|\| !mc_adr \|\| !mc ) return;
	573	if (Multicast && MasterClient) {
	574	printf ("I got a OACK as master Client, WRONG!\n");
	575	return;
	576	}
	577	/* ..I now accept packets destined for this MCAST addr, port */
	578	if (!Multicast) {
	579	if (Bitmap) {
	580	printf ("Internal failure! no mcast.\n");
	581	free(Bitmap);
	582	Bitmap=NULL;
	583	ProhibitMcast=1;
	584	return ;
	585	}
	586	/* I malloc instead of pre-declare; so that if the file ends
85eb5caf WD	587	* up being too big for this bitmap I can retry
85eb5caf WD	588	*/
53a5c424 DU	589	if (!(Bitmap = malloc (Mapsize))) {
	590	printf ("No Bitmap, no multicast. Sorry.\n");
	591	ProhibitMcast=1;
	592	return;
	593	}
	594	memset (Bitmap,0,Mapsize);
	595	PrevBitmapHole = 0;
	596	Multicast = 1;
	597	}
	598	addr = string_to_ip(mc_adr);
	599	if (Mcast_addr != addr) {
	600	if (Mcast_addr)
	601	eth_mcast_join(Mcast_addr, 0);
	602	if (eth_mcast_join(Mcast_addr=addr, 1)) {
	603	printf ("Fail to set mcast, revert to TFTP\n");
	604	ProhibitMcast=1;
	605	mcast_cleanup();
	606	NetStartAgain();
	607	}
	608	}
	609	MasterClient = (unsigned char)simple_strtoul((char *)mc,NULL,10);
	610	Mcast_port = (unsigned short)simple_strtoul(port,NULL,10);
	611	printf ("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient);
	612	return;
	613	}
	614
	615	#endif /* Multicast TFTP */
	616
30b52df9	617	#endif