[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		5000UL		/* Millisecs to timeout for 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 IPaddr_t TftpServerIP;
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];

#ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
#define MAX_LEN 128
#else
#define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
#endif

static char tftp_filename[MAX_LEN];

#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 (flash_info[i].flash_id == FLASH_UNKNOWN)
			continue;
		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, "%lu", TIMEOUT / 1000);
#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, TftpServerIP, 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, 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, TftpTimeout);
		TftpSend ();
	}
}


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

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

		strncpy(tftp_filename, default_filename, MAX_LEN);
		tftp_filename[MAX_LEN-1] = 0;

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

		if (p == NULL) {
			strncpy(tftp_filename, BootFile, MAX_LEN);
			tftp_filename[MAX_LEN-1] = 0;
		} else {
			*p++ = '\0';
			TftpServerIP = string_to_ip (BootFile);
			strncpy(tftp_filename, p, MAX_LEN);
			tftp_filename[MAX_LEN-1] = 0;
		}
	}

#if defined(CONFIG_NET_MULTI)
	printf ("Using %s device\n", eth_get_name());
#endif
	puts ("TFTP from server ");	print_IPaddr (TftpServerIP);
	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	= TftpServerIP & 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, 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 # */
49f3bdbb	18	#define TIMEOUT 5000UL /* Millisecs to timeout for 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	36
a93907c4	37	static IPaddr_t TftpServerIP;
fe8c2806 WD	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)
fe8c2806 WD	57	static char default_filename[DEFAULT_NAME_LEN];
a93907c4 JCPV	58
	59	#ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
	60	#define MAX_LEN 128
	61	#else
	62	#define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
	63	#endif
	64
	65	static char tftp_filename[MAX_LEN];
fe8c2806 WD	66
fe8c2806 WD	67	#ifdef CFG_DIRECT_FLASH_TFTP
e6f2e902	68	extern flash_info_t flash_info[];
fe8c2806 WD	69	#endif
fe8c2806 WD	70
85eb5caf WD	71	/* 512 is poor choice for ethernet, MTU is typically 1500.
85eb5caf WD	72	* Minus eth.hdrs thats 1468. Can get 2x better throughput with
53a5c424 DU	73	* almost-MTU block sizes. At least try... fall back to 512 if need be.
	74	*/
	75	#define TFTP_MTU_BLOCKSIZE 1468
	76	static unsigned short TftpBlkSize=TFTP_BLOCK_SIZE;
	77	static unsigned short TftpBlkSizeOption=TFTP_MTU_BLOCKSIZE;
	78
	79	#ifdef CONFIG_MCAST_TFTP
	80	#include <malloc.h>
	81	#define MTFTP_BITMAPSIZE 0x1000
	82	static unsigned *Bitmap;
	83	static int PrevBitmapHole,Mapsize=MTFTP_BITMAPSIZE;
	84	static uchar ProhibitMcast=0, MasterClient=0;
	85	static uchar Multicast=0;
	86	extern IPaddr_t Mcast_addr;
	87	static int Mcast_port;
	88	static ulong TftpEndingBlock; /* can get 'last' block before done..*/
	89
	90	static void parse_multicast_oack(char *pkt,int len);
	91
	92	static void
	93	mcast_cleanup(void)
	94	{
	95	if (Mcast_addr) eth_mcast_join(Mcast_addr, 0);
	96	if (Bitmap) free(Bitmap);
	97	Bitmap=NULL;
	98	Mcast_addr = Multicast = Mcast_port = 0;
	99	TftpEndingBlock = -1;
	100	}
	101
	102	#endif /* CONFIG_MCAST_TFTP */
	103
fe8c2806 WD	104	static __inline__ void
	105	store_block (unsigned block, uchar * src, unsigned len)
	106	{
53a5c424	107	ulong offset = block * TftpBlkSize + TftpBlockWrapOffset;
3f85ce27	108	ulong newsize = offset + len;
fe8c2806 WD	109	#ifdef CFG_DIRECT_FLASH_TFTP
	110	int i, rc = 0;
	111
	112	for (i=0; i<CFG_MAX_FLASH_BANKS; i++) {
	113	/* start address in flash? */
be1b0d27 JF	114	if (flash_info[i].flash_id == FLASH_UNKNOWN)
be1b0d27 JF	115	continue;
fe8c2806 WD	116	if (load_addr + offset >= flash_info[i].start[0]) {
	117	rc = 1;
	118	break;
	119	}
	120	}
	121
	122	if (rc) { /* Flash is destination for this packet */
77ddac94	123	rc = flash_write ((char *)src, (ulong)(load_addr+offset), len);
fe8c2806 WD	124	if (rc) {
	125	flash_perror (rc);
	126	NetState = NETLOOP_FAIL;
	127	return;
	128	}
	129	}
	130	else
	131	#endif /* CFG_DIRECT_FLASH_TFTP */
	132	{
	133	(void)memcpy((void *)(load_addr + offset), src, len);
	134	}
53a5c424 DU	135	#ifdef CONFIG_MCAST_TFTP
	136	if (Multicast)
	137	ext2_set_bit(block, Bitmap);
	138	#endif
fe8c2806 WD	139
	140	if (NetBootFileXferSize < newsize)
	141	NetBootFileXferSize = newsize;
	142	}
	143
	144	static void TftpSend (void);
	145	static void TftpTimeout (void);
	146
	147	/**********************************************************************/
	148
	149	static void
	150	TftpSend (void)
	151	{
	152	volatile uchar * pkt;
	153	volatile uchar * xp;
	154	int len = 0;
7bc5ee07	155	volatile ushort *s;
fe8c2806	156
85eb5caf	157	#ifdef CONFIG_MCAST_TFTP
53a5c424	158	/* Multicast TFTP.. non-MasterClients do not ACK data. */
85eb5caf WD	159	if (Multicast
	160	&& (TftpState == STATE_DATA)
	161	&& (MasterClient == 0))
53a5c424 DU	162	return;
53a5c424 DU	163	#endif
fe8c2806 WD	164	/*
	165	* We will always be sending some sort of packet, so
	166	* cobble together the packet headers now.
	167	*/
a3d991bd	168	pkt = NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE;
fe8c2806 WD	169
	170	switch (TftpState) {
	171
	172	case STATE_RRQ:
	173	xp = pkt;
7bc5ee07 WD	174	s = (ushort *)pkt;
	175	*s++ = htons(TFTP_RRQ);
	176	pkt = (uchar *)s;
fe8c2806 WD	177	strcpy ((char *)pkt, tftp_filename);
	178	pkt += strlen(tftp_filename) + 1;
	179	strcpy ((char *)pkt, "octet");
	180	pkt += 5 /strlen("octet")/ + 1;
fbe4b5cb WD	181	strcpy ((char *)pkt, "timeout");
fbe4b5cb WD	182	pkt += 7 /strlen("timeout")/ + 1;
49f3bdbb	183	sprintf((char *)pkt, "%lu", TIMEOUT / 1000);
fbe4b5cb WD	184	#ifdef ET_DEBUG
	185	printf("send option \"timeout %s\"\n", (char *)pkt);
	186	#endif
	187	pkt += strlen((char *)pkt) + 1;
53a5c424 DU	188	/* try for more effic. blk size */
53a5c424 DU	189	pkt += sprintf((char *)pkt,"blksize%c%d%c",
ef8f2075	190	0,TftpBlkSizeOption,0);
85eb5caf	191	#ifdef CONFIG_MCAST_TFTP
53a5c424	192	/* Check all preconditions before even trying the option */
85eb5caf WD	193	if (!ProhibitMcast
85eb5caf WD	194	&& (Bitmap=malloc(Mapsize))
53a5c424 DU	195	&& eth_get_dev()->mcast) {
	196	free(Bitmap);
	197	Bitmap=NULL;
	198	pkt += sprintf((char *)pkt,"multicast%c%c",0,0);
	199	}
	200	#endif /* CONFIG_MCAST_TFTP */
fe8c2806 WD	201	len = pkt - xp;
	202	break;
	203
fbe4b5cb	204	case STATE_OACK:
53a5c424 DU	205	#ifdef CONFIG_MCAST_TFTP
	206	/* My turn! Start at where I need blocks I missed.*/
	207	if (Multicast)
	208	TftpBlock=ext2_find_next_zero_bit(Bitmap,(Mapsize*8),0);
	209	/..falling../
	210	#endif
	211	case STATE_DATA:
fe8c2806	212	xp = pkt;
7bc5ee07 WD	213	s = (ushort *)pkt;
	214	*s++ = htons(TFTP_ACK);
	215	*s++ = htons(TftpBlock);
	216	pkt = (uchar *)s;
fe8c2806 WD	217	len = pkt - xp;
	218	break;
	219
	220	case STATE_TOO_LARGE:
	221	xp = pkt;
7bc5ee07 WD	222	s = (ushort *)pkt;
	223	*s++ = htons(TFTP_ERROR);
	224	*s++ = htons(3);
	225	pkt = (uchar *)s;
fe8c2806 WD	226	strcpy ((char *)pkt, "File too large");
	227	pkt += 14 /strlen("File too large")/ + 1;
	228	len = pkt - xp;
	229	break;
	230
	231	case STATE_BAD_MAGIC:
	232	xp = pkt;
7bc5ee07 WD	233	s = (ushort *)pkt;
	234	*s++ = htons(TFTP_ERROR);
	235	*s++ = htons(2);
	236	pkt = (uchar *)s;
fe8c2806 WD	237	strcpy ((char *)pkt, "File has bad magic");
	238	pkt += 18 /strlen("File has bad magic")/ + 1;
	239	len = pkt - xp;
	240	break;
	241	}
	242
a93907c4	243	NetSendUDPPacket(NetServerEther, TftpServerIP, TftpServerPort, TftpOurPort, len);
fe8c2806 WD	244	}
	245
	246
	247	static void
	248	TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
	249	{
	250	ushort proto;
7bc5ee07	251	ushort *s;
ff13ac8c	252	int i;
fe8c2806 WD	253
fe8c2806 WD	254	if (dest != TftpOurPort) {
53a5c424	255	#ifdef CONFIG_MCAST_TFTP
85eb5caf	256	if (Multicast
53a5c424 DU	257	&& (!Mcast_port \|\| (dest != Mcast_port)))
53a5c424 DU	258	#endif
fe8c2806 WD	259	return;
	260	}
	261	if (TftpState != STATE_RRQ && src != TftpServerPort) {
	262	return;
	263	}
	264
	265	if (len < 2) {
	266	return;
	267	}
	268	len -= 2;
	269	/* warning: don't use increment (++) in ntohs() macros!! */
7bc5ee07 WD	270	s = (ushort *)pkt;
	271	proto = *s++;
	272	pkt = (uchar *)s;
fe8c2806 WD	273	switch (ntohs(proto)) {
	274
	275	case TFTP_RRQ:
	276	case TFTP_WRQ:
	277	case TFTP_ACK:
	278	break;
	279	default:
	280	break;
	281
fbe4b5cb WD	282	case TFTP_OACK:
fbe4b5cb WD	283	#ifdef ET_DEBUG
ff13ac8c	284	printf("Got OACK: %s %s\n", pkt, pkt+strlen(pkt)+1);
fbe4b5cb WD	285	#endif
	286	TftpState = STATE_OACK;
	287	TftpServerPort = src;
60174746 WD	288	/*
	289	* Check for 'blksize' option.
	290	* Careful: "i" is signed, "len" is unsigned, thus
	291	* something like "len-8" may give a huge number
	292	*/
	293	for (i=0; i+8<len; i++) {
ff13ac8c WD	294	if (strcmp ((char*)pkt+i,"blksize") == 0) {
	295	TftpBlkSize = (unsigned short)
	296	simple_strtoul((char*)pkt+i+8,NULL,10);
53a5c424	297	#ifdef ET_DEBUG
ff13ac8c WD	298	printf ("Blocksize ack: %s, %d\n",
ff13ac8c WD	299	(char*)pkt+i+8,TftpBlkSize);
53a5c424	300	#endif
ff13ac8c WD	301	break;
ff13ac8c WD	302	}
53a5c424 DU	303	}
	304	#ifdef CONFIG_MCAST_TFTP
	305	parse_multicast_oack((char *)pkt,len-1);
85eb5caf	306	if ((Multicast) && (!MasterClient))
53a5c424 DU	307	TftpState = STATE_DATA; /* passive.. */
	308	else
	309	#endif
fbe4b5cb WD	310	TftpSend (); /* Send ACK */
fbe4b5cb WD	311	break;
fe8c2806 WD	312	case TFTP_DATA:
	313	if (len < 2)
	314	return;
	315	len -= 2;
	316	TftpBlock = ntohs((ushort )pkt);
3f85ce27 WD	317
3f85ce27 WD	318	/*
cd0a9de6 WD	319	* RFC1350 specifies that the first data packet will
	320	* have sequence number 1. If we receive a sequence
	321	* number of 0 this means that there was a wrap
	322	* around of the (16 bit) counter.
3f85ce27 WD	323	*/
	324	if (TftpBlock == 0) {
	325	TftpBlockWrap++;
53a5c424	326	TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE;
ddd5d9da	327	printf ("\n\t %lu MB received\n\t ", TftpBlockWrapOffset>>20);
3f85ce27 WD	328	} else {
	329	if (((TftpBlock - 1) % 10) == 0) {
	330	putc ('#');
	331	} else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {
	332	puts ("\n\t ");
	333	}
fe8c2806 WD	334	}
fe8c2806 WD	335
fbe4b5cb	336	#ifdef ET_DEBUG
fe8c2806	337	if (TftpState == STATE_RRQ) {
4b9206ed	338	puts ("Server did not acknowledge timeout option!\n");
fbe4b5cb WD	339	}
	340	#endif
	341
	342	if (TftpState == STATE_RRQ \|\| TftpState == STATE_OACK) {
3f85ce27	343	/* first block received */
fe8c2806 WD	344	TftpState = STATE_DATA;
	345	TftpServerPort = src;
	346	TftpLastBlock = 0;
3f85ce27 WD	347	TftpBlockWrap = 0;
3f85ce27 WD	348	TftpBlockWrapOffset = 0;
fe8c2806	349
53a5c424 DU	350	#ifdef CONFIG_MCAST_TFTP
	351	if (Multicast) { /* start!=1 common if mcast */
	352	TftpLastBlock = TftpBlock - 1;
	353	} else
	354	#endif
fe8c2806 WD	355	if (TftpBlock != 1) { /* Assertion */
fe8c2806 WD	356	printf ("\nTFTP error: "
3f85ce27	357	"First block is not block 1 (%ld)\n"
fe8c2806 WD	358	"Starting again\n\n",
	359	TftpBlock);
	360	NetStartAgain ();
	361	break;
	362	}
	363	}
	364
	365	if (TftpBlock == TftpLastBlock) {
	366	/*
	367	* Same block again; ignore it.
	368	*/
	369	break;
	370	}
	371
	372	TftpLastBlock = TftpBlock;
49f3bdbb	373	NetSetTimeout (TIMEOUT, TftpTimeout);
fe8c2806 WD	374
	375	store_block (TftpBlock - 1, pkt + 2, len);
	376
	377	/*
	378	* Acknoledge the block just received, which will prompt
	379	* the server for the next one.
	380	*/
53a5c424	381	#ifdef CONFIG_MCAST_TFTP
85eb5caf WD	382	/* if I am the MasterClient, actively calculate what my next
85eb5caf WD	383	* needed block is; else I'm passive; not ACKING
a93907c4	384	*/
53a5c424 DU	385	if (Multicast) {
	386	if (len < TftpBlkSize) {
	387	TftpEndingBlock = TftpBlock;
	388	} else if (MasterClient) {
85eb5caf	389	TftpBlock = PrevBitmapHole =
53a5c424 DU	390	ext2_find_next_zero_bit(
	391	Bitmap,
	392	(Mapsize*8),
	393	PrevBitmapHole);
	394	if (TftpBlock > ((Mapsize*8) - 1)) {
	395	printf ("tftpfile too big\n");
	396	/* try to double it and retry */
	397	Mapsize<<=1;
	398	mcast_cleanup();
	399	NetStartAgain ();
	400	return;
	401	}
	402	TftpLastBlock = TftpBlock;
	403	}
	404	}
	405	#endif
fe8c2806 WD	406	TftpSend ();
fe8c2806 WD	407
53a5c424 DU	408	#ifdef CONFIG_MCAST_TFTP
	409	if (Multicast) {
	410	if (MasterClient && (TftpBlock >= TftpEndingBlock)) {
	411	puts ("\nMulticast tftp done\n");
	412	mcast_cleanup();
	413	NetState = NETLOOP_SUCCESS;
85eb5caf	414	}
53a5c424 DU	415	}
	416	else
	417	#endif
	418	if (len < TftpBlkSize) {
fe8c2806 WD	419	/*
	420	* We received the whole thing. Try to
	421	* run it.
	422	*/
	423	puts ("\ndone\n");
	424	NetState = NETLOOP_SUCCESS;
	425	}
	426	break;
	427
	428	case TFTP_ERROR:
	429	printf ("\nTFTP error: '%s' (%d)\n",
	430	pkt + 2, ntohs((ushort )pkt));
	431	puts ("Starting again\n\n");
53a5c424 DU	432	#ifdef CONFIG_MCAST_TFTP
	433	mcast_cleanup();
	434	#endif
fe8c2806 WD	435	NetStartAgain ();
	436	break;
	437	}
	438	}
	439
	440
	441	static void
	442	TftpTimeout (void)
	443	{
e0ac62d7	444	if (++TftpTimeoutCount > TIMEOUT_COUNT) {
fe8c2806	445	puts ("\nRetry count exceeded; starting again\n");
53a5c424 DU	446	#ifdef CONFIG_MCAST_TFTP
	447	mcast_cleanup();
	448	#endif
fe8c2806 WD	449	NetStartAgain ();
	450	} else {
	451	puts ("T ");
49f3bdbb	452	NetSetTimeout (TIMEOUT, TftpTimeout);
fe8c2806 WD	453	TftpSend ();
	454	}
	455	}
	456
	457
	458	void
	459	TftpStart (void)
	460	{
ecb0ccd9 WD	461	#ifdef CONFIG_TFTP_PORT
	462	char ep; / Environment pointer */
	463	#endif
	464
a93907c4	465	TftpServerIP = NetServerIP;
fe8c2806	466	if (BootFile[0] == '\0') {
fe8c2806	467	sprintf(default_filename, "%02lX%02lX%02lX%02lX.img",
c43352cc WD	468	NetOurIP & 0xFF,
	469	(NetOurIP >> 8) & 0xFF,
	470	(NetOurIP >> 16) & 0xFF,
	471	(NetOurIP >> 24) & 0xFF );
a93907c4 JCPV	472
	473	strncpy(tftp_filename, default_filename, MAX_LEN);
	474	tftp_filename[MAX_LEN-1] = 0;
fe8c2806 WD	475
	476	printf ("*** Warning: no boot file name; using '%s'\n",
	477	tftp_filename);
	478	} else {
38cc09c5	479	char *p = strchr (BootFile, ':');
a93907c4 JCPV	480
	481	if (p == NULL) {
	482	strncpy(tftp_filename, BootFile, MAX_LEN);
	483	tftp_filename[MAX_LEN-1] = 0;
	484	} else {
	485	*p++ = '\0';
	486	TftpServerIP = string_to_ip (BootFile);
	487	strncpy(tftp_filename, p, MAX_LEN);
	488	tftp_filename[MAX_LEN-1] = 0;
	489	}
fe8c2806 WD	490	}
fe8c2806 WD	491
5bb226e8 WD	492	#if defined(CONFIG_NET_MULTI)
	493	printf ("Using %s device\n", eth_get_name());
	494	#endif
a93907c4	495	puts ("TFTP from server "); print_IPaddr (TftpServerIP);
fe8c2806 WD	496	puts ("; our IP address is "); print_IPaddr (NetOurIP);
	497
	498	/* Check if we need to send across this subnet */
	499	if (NetOurGatewayIP && NetOurSubnetMask) {
a93907c4 JCPV	500	IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
a93907c4 JCPV	501	IPaddr_t ServerNet = TftpServerIP & NetOurSubnetMask;
fe8c2806 WD	502
	503	if (OurNet != ServerNet) {
	504	puts ("; sending through gateway ");
	505	print_IPaddr (NetOurGatewayIP) ;
	506	}
	507	}
	508	putc ('\n');
	509
	510	printf ("Filename '%s'.", tftp_filename);
	511
	512	if (NetBootFileSize) {
	513	printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
	514	print_size (NetBootFileSize<<9, "");
	515	}
	516
	517	putc ('\n');
	518
	519	printf ("Load address: 0x%lx\n", load_addr);
	520
	521	puts ("Loading: *\b");
	522
49f3bdbb	523	NetSetTimeout (TIMEOUT, TftpTimeout);
fe8c2806 WD	524	NetSetHandler (TftpHandler);
	525
	526	TftpServerPort = WELL_KNOWN_PORT;
	527	TftpTimeoutCount = 0;
	528	TftpState = STATE_RRQ;
ecb0ccd9	529	/* Use a pseudo-random port unless a specific port is set */
fe8c2806	530	TftpOurPort = 1024 + (get_timer(0) % 3072);
53a5c424	531
ecb0ccd9	532	#ifdef CONFIG_TFTP_PORT
28cb9375 WD	533	if ((ep = getenv("tftpdstp")) != NULL) {
	534	TftpServerPort = simple_strtol(ep, NULL, 10);
	535	}
	536	if ((ep = getenv("tftpsrcp")) != NULL) {
ecb0ccd9 WD	537	TftpOurPort= simple_strtol(ep, NULL, 10);
	538	}
	539	#endif
fbe4b5cb	540	TftpBlock = 0;
fe8c2806	541
73a8b27c WD	542	/* zero out server ether in case the server ip has changed */
73a8b27c WD	543	memset(NetServerEther, 0, 6);
53a5c424 DU	544	/* Revert TftpBlkSize to dflt */
	545	TftpBlkSize = TFTP_BLOCK_SIZE;
	546	#ifdef CONFIG_MCAST_TFTP
a93907c4	547	mcast_cleanup();
53a5c424	548	#endif
73a8b27c	549
fe8c2806 WD	550	TftpSend ();
	551	}
	552
53a5c424 DU	553	#ifdef CONFIG_MCAST_TFTP
	554	/* Credits: atftp project.
	555	*/
	556
	557	/* pick up BcastAddr, Port, and whether I am [now] the master-client. *
	558	* Frame:
	559	* +-------+-----------+---+-------~~-------+---+
	560	* \| opc \| multicast \| 0 \| addr, port, mc \| 0 \|
	561	* +-------+-----------+---+-------~~-------+---+
	562	* The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
	563	* I am the new master-client so must send ACKs to DataBlocks. If I am not
	564	* master-client, I'm a passive client, gathering what DataBlocks I may and
	565	* making note of which ones I got in my bitmask.
	566	* In theory, I never go from master->passive..
	567	* .. this comes in with pkt already pointing just past opc
	568	*/
	569	static void parse_multicast_oack(char *pkt, int len)
	570	{
	571	int i;
	572	IPaddr_t addr;
	573	char mc_adr, port, *mc;
	574
	575	mc_adr=port=mc=NULL;
	576	/* march along looking for 'multicast\0', which has to start at least
	577	* 14 bytes back from the end.
	578	*/
	579	for (i=0;i<len-14;i++)
	580	if (strcmp (pkt+i,"multicast") == 0)
	581	break;
	582	if (i >= (len-14)) /* non-Multicast OACK, ign. */
	583	return;
85eb5caf	584
53a5c424 DU	585	i+=10; /* strlen multicast */
	586	mc_adr = pkt+i;
	587	for (;i<len;i++) {
	588	if (*(pkt+i) == ',') {
	589	*(pkt+i) = '\0';
	590	if (port) {
	591	mc = pkt+i+1;
	592	break;
	593	} else {
	594	port = pkt+i+1;
	595	}
	596	}
	597	}
	598	if (!port \|\| !mc_adr \|\| !mc ) return;
	599	if (Multicast && MasterClient) {
	600	printf ("I got a OACK as master Client, WRONG!\n");
	601	return;
	602	}
	603	/* ..I now accept packets destined for this MCAST addr, port */
	604	if (!Multicast) {
	605	if (Bitmap) {
	606	printf ("Internal failure! no mcast.\n");
	607	free(Bitmap);
	608	Bitmap=NULL;
	609	ProhibitMcast=1;
	610	return ;
	611	}
	612	/* I malloc instead of pre-declare; so that if the file ends
85eb5caf WD	613	* up being too big for this bitmap I can retry
85eb5caf WD	614	*/
53a5c424 DU	615	if (!(Bitmap = malloc (Mapsize))) {
	616	printf ("No Bitmap, no multicast. Sorry.\n");
	617	ProhibitMcast=1;
	618	return;
	619	}
	620	memset (Bitmap,0,Mapsize);
	621	PrevBitmapHole = 0;
	622	Multicast = 1;
	623	}
	624	addr = string_to_ip(mc_adr);
	625	if (Mcast_addr != addr) {
	626	if (Mcast_addr)
	627	eth_mcast_join(Mcast_addr, 0);
	628	if (eth_mcast_join(Mcast_addr=addr, 1)) {
	629	printf ("Fail to set mcast, revert to TFTP\n");
	630	ProhibitMcast=1;
	631	mcast_cleanup();
	632	NetStartAgain();
	633	}
	634	}
	635	MasterClient = (unsigned char)simple_strtoul((char *)mc,NULL,10);
	636	Mcast_port = (unsigned short)simple_strtoul(port,NULL,10);
	637	printf ("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient);
	638	return;
	639	}
	640
	641	#endif /* Multicast TFTP */
	642
30b52df9	643	#endif