[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		5UL		/* 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 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 (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, 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 * 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

	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 * 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 # */
079c2c4f	18	#define TIMEOUT 5UL /* 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	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? */
	114	if (load_addr + offset >= flash_info[i].start[0]) {
	115	rc = 1;
	116	break;
	117	}
	118	}
	119
	120	if (rc) { /* Flash is destination for this packet */
77ddac94	121	rc = flash_write ((char *)src, (ulong)(load_addr+offset), len);
fe8c2806 WD	122	if (rc) {
	123	flash_perror (rc);
	124	NetState = NETLOOP_FAIL;
	125	return;
	126	}
	127	}
	128	else
	129	#endif /* CFG_DIRECT_FLASH_TFTP */
	130	{
	131	(void)memcpy((void *)(load_addr + offset), src, len);
	132	}
53a5c424 DU	133	#ifdef CONFIG_MCAST_TFTP
	134	if (Multicast)
	135	ext2_set_bit(block, Bitmap);
	136	#endif
fe8c2806 WD	137
	138	if (NetBootFileXferSize < newsize)
	139	NetBootFileXferSize = newsize;
	140	}
	141
	142	static void TftpSend (void);
	143	static void TftpTimeout (void);
	144
	145	/**********************************************************************/
	146
	147	static void
	148	TftpSend (void)
	149	{
	150	volatile uchar * pkt;
	151	volatile uchar * xp;
	152	int len = 0;
7bc5ee07	153	volatile ushort *s;
fe8c2806	154
85eb5caf	155	#ifdef CONFIG_MCAST_TFTP
53a5c424	156	/* Multicast TFTP.. non-MasterClients do not ACK data. */
85eb5caf WD	157	if (Multicast
	158	&& (TftpState == STATE_DATA)
	159	&& (MasterClient == 0))
53a5c424 DU	160	return;
53a5c424 DU	161	#endif
fe8c2806 WD	162	/*
	163	* We will always be sending some sort of packet, so
	164	* cobble together the packet headers now.
	165	*/
a3d991bd	166	pkt = NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE;
fe8c2806 WD	167
	168	switch (TftpState) {
	169
	170	case STATE_RRQ:
	171	xp = pkt;
7bc5ee07 WD	172	s = (ushort *)pkt;
	173	*s++ = htons(TFTP_RRQ);
	174	pkt = (uchar *)s;
fe8c2806 WD	175	strcpy ((char *)pkt, tftp_filename);
	176	pkt += strlen(tftp_filename) + 1;
	177	strcpy ((char *)pkt, "octet");
	178	pkt += 5 /strlen("octet")/ + 1;
fbe4b5cb WD	179	strcpy ((char *)pkt, "timeout");
	180	pkt += 7 /strlen("timeout")/ + 1;
	181	sprintf((char *)pkt, "%d", TIMEOUT);
	182	#ifdef ET_DEBUG
	183	printf("send option \"timeout %s\"\n", (char *)pkt);
	184	#endif
	185	pkt += strlen((char *)pkt) + 1;
53a5c424 DU	186	/* try for more effic. blk size */
53a5c424 DU	187	pkt += sprintf((char *)pkt,"blksize%c%d%c",
ef8f2075	188	0,TftpBlkSizeOption,0);
85eb5caf	189	#ifdef CONFIG_MCAST_TFTP
53a5c424	190	/* Check all preconditions before even trying the option */
85eb5caf WD	191	if (!ProhibitMcast
85eb5caf WD	192	&& (Bitmap=malloc(Mapsize))
53a5c424 DU	193	&& eth_get_dev()->mcast) {
	194	free(Bitmap);
	195	Bitmap=NULL;
	196	pkt += sprintf((char *)pkt,"multicast%c%c",0,0);
	197	}
	198	#endif /* CONFIG_MCAST_TFTP */
fe8c2806 WD	199	len = pkt - xp;
	200	break;
	201
fbe4b5cb	202	case STATE_OACK:
53a5c424 DU	203	#ifdef CONFIG_MCAST_TFTP
	204	/* My turn! Start at where I need blocks I missed.*/
	205	if (Multicast)
	206	TftpBlock=ext2_find_next_zero_bit(Bitmap,(Mapsize*8),0);
	207	/..falling../
	208	#endif
	209	case STATE_DATA:
fe8c2806	210	xp = pkt;
7bc5ee07 WD	211	s = (ushort *)pkt;
	212	*s++ = htons(TFTP_ACK);
	213	*s++ = htons(TftpBlock);
	214	pkt = (uchar *)s;
fe8c2806 WD	215	len = pkt - xp;
	216	break;
	217
	218	case STATE_TOO_LARGE:
	219	xp = pkt;
7bc5ee07 WD	220	s = (ushort *)pkt;
	221	*s++ = htons(TFTP_ERROR);
	222	*s++ = htons(3);
	223	pkt = (uchar *)s;
fe8c2806 WD	224	strcpy ((char *)pkt, "File too large");
	225	pkt += 14 /strlen("File too large")/ + 1;
	226	len = pkt - xp;
	227	break;
	228
	229	case STATE_BAD_MAGIC:
	230	xp = pkt;
7bc5ee07 WD	231	s = (ushort *)pkt;
	232	*s++ = htons(TFTP_ERROR);
	233	*s++ = htons(2);
	234	pkt = (uchar *)s;
fe8c2806 WD	235	strcpy ((char *)pkt, "File has bad magic");
	236	pkt += 18 /strlen("File has bad magic")/ + 1;
	237	len = pkt - xp;
	238	break;
	239	}
	240
a93907c4	241	NetSendUDPPacket(NetServerEther, TftpServerIP, TftpServerPort, TftpOurPort, len);
fe8c2806 WD	242	}
	243
	244
	245	static void
	246	TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
	247	{
	248	ushort proto;
7bc5ee07	249	ushort *s;
ff13ac8c	250	int i;
fe8c2806 WD	251
fe8c2806 WD	252	if (dest != TftpOurPort) {
53a5c424	253	#ifdef CONFIG_MCAST_TFTP
85eb5caf	254	if (Multicast
53a5c424 DU	255	&& (!Mcast_port \|\| (dest != Mcast_port)))
53a5c424 DU	256	#endif
fe8c2806 WD	257	return;
	258	}
	259	if (TftpState != STATE_RRQ && src != TftpServerPort) {
	260	return;
	261	}
	262
	263	if (len < 2) {
	264	return;
	265	}
	266	len -= 2;
	267	/* warning: don't use increment (++) in ntohs() macros!! */
7bc5ee07 WD	268	s = (ushort *)pkt;
	269	proto = *s++;
	270	pkt = (uchar *)s;
fe8c2806 WD	271	switch (ntohs(proto)) {
	272
	273	case TFTP_RRQ:
	274	case TFTP_WRQ:
	275	case TFTP_ACK:
	276	break;
	277	default:
	278	break;
	279
fbe4b5cb WD	280	case TFTP_OACK:
fbe4b5cb WD	281	#ifdef ET_DEBUG
ff13ac8c	282	printf("Got OACK: %s %s\n", pkt, pkt+strlen(pkt)+1);
fbe4b5cb WD	283	#endif
	284	TftpState = STATE_OACK;
	285	TftpServerPort = src;
60174746 WD	286	/*
	287	* Check for 'blksize' option.
	288	* Careful: "i" is signed, "len" is unsigned, thus
	289	* something like "len-8" may give a huge number
	290	*/
	291	for (i=0; i+8<len; i++) {
ff13ac8c WD	292	if (strcmp ((char*)pkt+i,"blksize") == 0) {
	293	TftpBlkSize = (unsigned short)
	294	simple_strtoul((char*)pkt+i+8,NULL,10);
53a5c424	295	#ifdef ET_DEBUG
ff13ac8c WD	296	printf ("Blocksize ack: %s, %d\n",
ff13ac8c WD	297	(char*)pkt+i+8,TftpBlkSize);
53a5c424	298	#endif
ff13ac8c WD	299	break;
ff13ac8c WD	300	}
53a5c424 DU	301	}
	302	#ifdef CONFIG_MCAST_TFTP
	303	parse_multicast_oack((char *)pkt,len-1);
85eb5caf	304	if ((Multicast) && (!MasterClient))
53a5c424 DU	305	TftpState = STATE_DATA; /* passive.. */
	306	else
	307	#endif
fbe4b5cb WD	308	TftpSend (); /* Send ACK */
fbe4b5cb WD	309	break;
fe8c2806 WD	310	case TFTP_DATA:
	311	if (len < 2)
	312	return;
	313	len -= 2;
	314	TftpBlock = ntohs((ushort )pkt);
3f85ce27 WD	315
3f85ce27 WD	316	/*
cd0a9de6 WD	317	* RFC1350 specifies that the first data packet will
	318	* have sequence number 1. If we receive a sequence
	319	* number of 0 this means that there was a wrap
	320	* around of the (16 bit) counter.
3f85ce27 WD	321	*/
	322	if (TftpBlock == 0) {
	323	TftpBlockWrap++;
53a5c424	324	TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE;
ddd5d9da	325	printf ("\n\t %lu MB received\n\t ", TftpBlockWrapOffset>>20);
3f85ce27 WD	326	} else {
	327	if (((TftpBlock - 1) % 10) == 0) {
	328	putc ('#');
	329	} else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {
	330	puts ("\n\t ");
	331	}
fe8c2806 WD	332	}
fe8c2806 WD	333
fbe4b5cb	334	#ifdef ET_DEBUG
fe8c2806	335	if (TftpState == STATE_RRQ) {
4b9206ed	336	puts ("Server did not acknowledge timeout option!\n");
fbe4b5cb WD	337	}
	338	#endif
	339
	340	if (TftpState == STATE_RRQ \|\| TftpState == STATE_OACK) {
3f85ce27	341	/* first block received */
fe8c2806 WD	342	TftpState = STATE_DATA;
	343	TftpServerPort = src;
	344	TftpLastBlock = 0;
3f85ce27 WD	345	TftpBlockWrap = 0;
3f85ce27 WD	346	TftpBlockWrapOffset = 0;
fe8c2806	347
53a5c424 DU	348	#ifdef CONFIG_MCAST_TFTP
	349	if (Multicast) { /* start!=1 common if mcast */
	350	TftpLastBlock = TftpBlock - 1;
	351	} else
	352	#endif
fe8c2806 WD	353	if (TftpBlock != 1) { /* Assertion */
fe8c2806 WD	354	printf ("\nTFTP error: "
3f85ce27	355	"First block is not block 1 (%ld)\n"
fe8c2806 WD	356	"Starting again\n\n",
	357	TftpBlock);
	358	NetStartAgain ();
	359	break;
	360	}
	361	}
	362
	363	if (TftpBlock == TftpLastBlock) {
	364	/*
	365	* Same block again; ignore it.
	366	*/
	367	break;
	368	}
	369
	370	TftpLastBlock = TftpBlock;
	371	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	372
	373	store_block (TftpBlock - 1, pkt + 2, len);
	374
	375	/*
	376	* Acknoledge the block just received, which will prompt
	377	* the server for the next one.
	378	*/
53a5c424	379	#ifdef CONFIG_MCAST_TFTP
85eb5caf WD	380	/* if I am the MasterClient, actively calculate what my next
85eb5caf WD	381	* needed block is; else I'm passive; not ACKING
a93907c4	382	*/
53a5c424 DU	383	if (Multicast) {
	384	if (len < TftpBlkSize) {
	385	TftpEndingBlock = TftpBlock;
	386	} else if (MasterClient) {
85eb5caf	387	TftpBlock = PrevBitmapHole =
53a5c424 DU	388	ext2_find_next_zero_bit(
	389	Bitmap,
	390	(Mapsize*8),
	391	PrevBitmapHole);
	392	if (TftpBlock > ((Mapsize*8) - 1)) {
	393	printf ("tftpfile too big\n");
	394	/* try to double it and retry */
	395	Mapsize<<=1;
	396	mcast_cleanup();
	397	NetStartAgain ();
	398	return;
	399	}
	400	TftpLastBlock = TftpBlock;
	401	}
	402	}
	403	#endif
fe8c2806 WD	404	TftpSend ();
fe8c2806 WD	405
53a5c424 DU	406	#ifdef CONFIG_MCAST_TFTP
	407	if (Multicast) {
	408	if (MasterClient && (TftpBlock >= TftpEndingBlock)) {
	409	puts ("\nMulticast tftp done\n");
	410	mcast_cleanup();
	411	NetState = NETLOOP_SUCCESS;
85eb5caf	412	}
53a5c424 DU	413	}
	414	else
	415	#endif
	416	if (len < TftpBlkSize) {
fe8c2806 WD	417	/*
	418	* We received the whole thing. Try to
	419	* run it.
	420	*/
	421	puts ("\ndone\n");
	422	NetState = NETLOOP_SUCCESS;
	423	}
	424	break;
	425
	426	case TFTP_ERROR:
	427	printf ("\nTFTP error: '%s' (%d)\n",
	428	pkt + 2, ntohs((ushort )pkt));
	429	puts ("Starting again\n\n");
53a5c424 DU	430	#ifdef CONFIG_MCAST_TFTP
	431	mcast_cleanup();
	432	#endif
fe8c2806 WD	433	NetStartAgain ();
	434	break;
	435	}
	436	}
	437
	438
	439	static void
	440	TftpTimeout (void)
	441	{
e0ac62d7	442	if (++TftpTimeoutCount > TIMEOUT_COUNT) {
fe8c2806	443	puts ("\nRetry count exceeded; starting again\n");
53a5c424 DU	444	#ifdef CONFIG_MCAST_TFTP
	445	mcast_cleanup();
	446	#endif
fe8c2806 WD	447	NetStartAgain ();
	448	} else {
	449	puts ("T ");
	450	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	451	TftpSend ();
	452	}
	453	}
	454
	455
	456	void
	457	TftpStart (void)
	458	{
ecb0ccd9 WD	459	#ifdef CONFIG_TFTP_PORT
	460	char ep; / Environment pointer */
	461	#endif
	462
a93907c4	463	TftpServerIP = NetServerIP;
fe8c2806	464	if (BootFile[0] == '\0') {
fe8c2806	465	sprintf(default_filename, "%02lX%02lX%02lX%02lX.img",
c43352cc WD	466	NetOurIP & 0xFF,
	467	(NetOurIP >> 8) & 0xFF,
	468	(NetOurIP >> 16) & 0xFF,
	469	(NetOurIP >> 24) & 0xFF );
a93907c4 JCPV	470
	471	strncpy(tftp_filename, default_filename, MAX_LEN);
	472	tftp_filename[MAX_LEN-1] = 0;
fe8c2806 WD	473
	474	printf ("*** Warning: no boot file name; using '%s'\n",
	475	tftp_filename);
	476	} else {
38cc09c5	477	char *p = strchr (BootFile, ':');
a93907c4 JCPV	478
	479	if (p == NULL) {
	480	strncpy(tftp_filename, BootFile, MAX_LEN);
	481	tftp_filename[MAX_LEN-1] = 0;
	482	} else {
	483	*p++ = '\0';
	484	TftpServerIP = string_to_ip (BootFile);
	485	strncpy(tftp_filename, p, MAX_LEN);
	486	tftp_filename[MAX_LEN-1] = 0;
	487	}
fe8c2806 WD	488	}
fe8c2806 WD	489
5bb226e8 WD	490	#if defined(CONFIG_NET_MULTI)
	491	printf ("Using %s device\n", eth_get_name());
	492	#endif
a93907c4	493	puts ("TFTP from server "); print_IPaddr (TftpServerIP);
fe8c2806 WD	494	puts ("; our IP address is "); print_IPaddr (NetOurIP);
	495
	496	/* Check if we need to send across this subnet */
	497	if (NetOurGatewayIP && NetOurSubnetMask) {
a93907c4 JCPV	498	IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
a93907c4 JCPV	499	IPaddr_t ServerNet = TftpServerIP & NetOurSubnetMask;
fe8c2806 WD	500
	501	if (OurNet != ServerNet) {
	502	puts ("; sending through gateway ");
	503	print_IPaddr (NetOurGatewayIP) ;
	504	}
	505	}
	506	putc ('\n');
	507
	508	printf ("Filename '%s'.", tftp_filename);
	509
	510	if (NetBootFileSize) {
	511	printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
	512	print_size (NetBootFileSize<<9, "");
	513	}
	514
	515	putc ('\n');
	516
	517	printf ("Load address: 0x%lx\n", load_addr);
	518
	519	puts ("Loading: *\b");
	520
	521	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	522	NetSetHandler (TftpHandler);
	523
	524	TftpServerPort = WELL_KNOWN_PORT;
	525	TftpTimeoutCount = 0;
	526	TftpState = STATE_RRQ;
ecb0ccd9	527	/* Use a pseudo-random port unless a specific port is set */
fe8c2806	528	TftpOurPort = 1024 + (get_timer(0) % 3072);
53a5c424	529
ecb0ccd9	530	#ifdef CONFIG_TFTP_PORT
28cb9375 WD	531	if ((ep = getenv("tftpdstp")) != NULL) {
	532	TftpServerPort = simple_strtol(ep, NULL, 10);
	533	}
	534	if ((ep = getenv("tftpsrcp")) != NULL) {
ecb0ccd9 WD	535	TftpOurPort= simple_strtol(ep, NULL, 10);
	536	}
	537	#endif
fbe4b5cb	538	TftpBlock = 0;
fe8c2806	539
73a8b27c WD	540	/* zero out server ether in case the server ip has changed */
73a8b27c WD	541	memset(NetServerEther, 0, 6);
53a5c424 DU	542	/* Revert TftpBlkSize to dflt */
	543	TftpBlkSize = TFTP_BLOCK_SIZE;
	544	#ifdef CONFIG_MCAST_TFTP
a93907c4	545	mcast_cleanup();
53a5c424	546	#endif
73a8b27c	547
fe8c2806 WD	548	TftpSend ();
	549	}
	550
53a5c424 DU	551	#ifdef CONFIG_MCAST_TFTP
	552	/* Credits: atftp project.
	553	*/
	554
	555	/* pick up BcastAddr, Port, and whether I am [now] the master-client. *
	556	* Frame:
	557	* +-------+-----------+---+-------~~-------+---+
	558	* \| opc \| multicast \| 0 \| addr, port, mc \| 0 \|
	559	* +-------+-----------+---+-------~~-------+---+
	560	* The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
	561	* I am the new master-client so must send ACKs to DataBlocks. If I am not
	562	* master-client, I'm a passive client, gathering what DataBlocks I may and
	563	* making note of which ones I got in my bitmask.
	564	* In theory, I never go from master->passive..
	565	* .. this comes in with pkt already pointing just past opc
	566	*/
	567	static void parse_multicast_oack(char *pkt, int len)
	568	{
	569	int i;
	570	IPaddr_t addr;
	571	char mc_adr, port, *mc;
	572
	573	mc_adr=port=mc=NULL;
	574	/* march along looking for 'multicast\0', which has to start at least
	575	* 14 bytes back from the end.
	576	*/
	577	for (i=0;i<len-14;i++)
	578	if (strcmp (pkt+i,"multicast") == 0)
	579	break;
	580	if (i >= (len-14)) /* non-Multicast OACK, ign. */
	581	return;
85eb5caf	582
53a5c424 DU	583	i+=10; /* strlen multicast */
	584	mc_adr = pkt+i;
	585	for (;i<len;i++) {
	586	if (*(pkt+i) == ',') {
	587	*(pkt+i) = '\0';
	588	if (port) {
	589	mc = pkt+i+1;
	590	break;
	591	} else {
	592	port = pkt+i+1;
	593	}
	594	}
	595	}
	596	if (!port \|\| !mc_adr \|\| !mc ) return;
	597	if (Multicast && MasterClient) {
	598	printf ("I got a OACK as master Client, WRONG!\n");
	599	return;
	600	}
	601	/* ..I now accept packets destined for this MCAST addr, port */
	602	if (!Multicast) {
	603	if (Bitmap) {
	604	printf ("Internal failure! no mcast.\n");
	605	free(Bitmap);
	606	Bitmap=NULL;
	607	ProhibitMcast=1;
	608	return ;
	609	}
	610	/* I malloc instead of pre-declare; so that if the file ends
85eb5caf WD	611	* up being too big for this bitmap I can retry
85eb5caf WD	612	*/
53a5c424 DU	613	if (!(Bitmap = malloc (Mapsize))) {
	614	printf ("No Bitmap, no multicast. Sorry.\n");
	615	ProhibitMcast=1;
	616	return;
	617	}
	618	memset (Bitmap,0,Mapsize);
	619	PrevBitmapHole = 0;
	620	Multicast = 1;
	621	}
	622	addr = string_to_ip(mc_adr);
	623	if (Mcast_addr != addr) {
	624	if (Mcast_addr)
	625	eth_mcast_join(Mcast_addr, 0);
	626	if (eth_mcast_join(Mcast_addr=addr, 1)) {
	627	printf ("Fail to set mcast, revert to TFTP\n");
	628	ProhibitMcast=1;
	629	mcast_cleanup();
	630	NetStartAgain();
	631	}
	632	}
	633	MasterClient = (unsigned char)simple_strtoul((char *)mc,NULL,10);
	634	Mcast_port = (unsigned short)simple_strtoul(port,NULL,10);
	635	printf ("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient);
	636	return;
	637	}
	638
	639	#endif /* Multicast TFTP */
	640
30b52df9	641	#endif