[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 ulong TftpTimeoutMSecs = TIMEOUT;
static int TftpTimeoutCountMax = TIMEOUT_COUNT;

/*
 * These globals govern the timeout behavior when attempting a connection to a
 * TFTP server. TftpRRQTimeoutMSecs specifies the number of milliseconds to
 * wait for the server to respond to initial connection. Second global,
 * TftpRRQTimeoutCountMax, gives the number of such connection retries.
 * TftpRRQTimeoutCountMax must be non-negative and TftpRRQTimeoutMSecs must be
 * positive. The globals are meant to be set (and restored) by code needing
 * non-standard timeout behavior when initiating a TFTP transfer.
 */
ulong TftpRRQTimeoutMSecs = TIMEOUT;
int TftpRRQTimeoutCountMax = TIMEOUT_COUNT;

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;
		TftpTimeoutMSecs = TIMEOUT;
		TftpTimeoutCountMax = TIMEOUT_COUNT;
		NetSetTimeout (TftpTimeoutMSecs, 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 > TftpTimeoutCountMax) {
		puts ("\nRetry count exceeded; starting again\n");
#ifdef CONFIG_MCAST_TFTP
		mcast_cleanup();
#endif
		NetStartAgain ();
	} else {
		puts ("T ");
		NetSetTimeout (TftpTimeoutMSecs, 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");

	TftpTimeoutMSecs = TftpRRQTimeoutMSecs;
	TftpTimeoutCountMax = TftpRRQTimeoutCountMax;

	NetSetTimeout (TftpTimeoutMSecs, 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
e83cc063 BS	37	static ulong TftpTimeoutMSecs = TIMEOUT;
	38	static int TftpTimeoutCountMax = TIMEOUT_COUNT;
	39
	40	/*
	41	* These globals govern the timeout behavior when attempting a connection to a
	42	* TFTP server. TftpRRQTimeoutMSecs specifies the number of milliseconds to
	43	* wait for the server to respond to initial connection. Second global,
	44	* TftpRRQTimeoutCountMax, gives the number of such connection retries.
	45	* TftpRRQTimeoutCountMax must be non-negative and TftpRRQTimeoutMSecs must be
	46	* positive. The globals are meant to be set (and restored) by code needing
	47	* non-standard timeout behavior when initiating a TFTP transfer.
	48	*/
	49	ulong TftpRRQTimeoutMSecs = TIMEOUT;
	50	int TftpRRQTimeoutCountMax = TIMEOUT_COUNT;
	51
a93907c4	52	static IPaddr_t TftpServerIP;
fe8c2806 WD	53	static int TftpServerPort; /* The UDP port at their end */
	54	static int TftpOurPort; /* The UDP port at our end */
	55	static int TftpTimeoutCount;
3f85ce27 WD	56	static ulong TftpBlock; /* packet sequence number */
	57	static ulong TftpLastBlock; /* last packet sequence number received */
	58	static ulong TftpBlockWrap; /* count of sequence number wraparounds */
	59	static ulong TftpBlockWrapOffset; /* memory offset due to wrapping */
fe8c2806	60	static int TftpState;
3f85ce27	61
fe8c2806 WD	62	#define STATE_RRQ 1
	63	#define STATE_DATA 2
	64	#define STATE_TOO_LARGE 3
	65	#define STATE_BAD_MAGIC 4
fbe4b5cb	66	#define STATE_OACK 5
fe8c2806	67
3f85ce27 WD	68	#define TFTP_BLOCK_SIZE 512 /* default TFTP block size */
	69	#define TFTP_SEQUENCE_SIZE ((ulong)(1<<16)) /* sequence number is 16 bit */
	70
fe8c2806 WD	71	#define DEFAULT_NAME_LEN (8 + 4 + 1)
fe8c2806 WD	72	static char default_filename[DEFAULT_NAME_LEN];
a93907c4 JCPV	73
	74	#ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
	75	#define MAX_LEN 128
	76	#else
	77	#define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
	78	#endif
	79
	80	static char tftp_filename[MAX_LEN];
fe8c2806 WD	81
fe8c2806 WD	82	#ifdef CFG_DIRECT_FLASH_TFTP
e6f2e902	83	extern flash_info_t flash_info[];
fe8c2806 WD	84	#endif
fe8c2806 WD	85
85eb5caf WD	86	/* 512 is poor choice for ethernet, MTU is typically 1500.
85eb5caf WD	87	* Minus eth.hdrs thats 1468. Can get 2x better throughput with
53a5c424 DU	88	* almost-MTU block sizes. At least try... fall back to 512 if need be.
	89	*/
	90	#define TFTP_MTU_BLOCKSIZE 1468
	91	static unsigned short TftpBlkSize=TFTP_BLOCK_SIZE;
	92	static unsigned short TftpBlkSizeOption=TFTP_MTU_BLOCKSIZE;
	93
	94	#ifdef CONFIG_MCAST_TFTP
	95	#include <malloc.h>
	96	#define MTFTP_BITMAPSIZE 0x1000
	97	static unsigned *Bitmap;
	98	static int PrevBitmapHole,Mapsize=MTFTP_BITMAPSIZE;
	99	static uchar ProhibitMcast=0, MasterClient=0;
	100	static uchar Multicast=0;
	101	extern IPaddr_t Mcast_addr;
	102	static int Mcast_port;
	103	static ulong TftpEndingBlock; /* can get 'last' block before done..*/
	104
	105	static void parse_multicast_oack(char *pkt,int len);
	106
	107	static void
	108	mcast_cleanup(void)
	109	{
	110	if (Mcast_addr) eth_mcast_join(Mcast_addr, 0);
	111	if (Bitmap) free(Bitmap);
	112	Bitmap=NULL;
	113	Mcast_addr = Multicast = Mcast_port = 0;
	114	TftpEndingBlock = -1;
	115	}
	116
	117	#endif /* CONFIG_MCAST_TFTP */
	118
fe8c2806 WD	119	static __inline__ void
	120	store_block (unsigned block, uchar * src, unsigned len)
	121	{
53a5c424	122	ulong offset = block * TftpBlkSize + TftpBlockWrapOffset;
3f85ce27	123	ulong newsize = offset + len;
fe8c2806 WD	124	#ifdef CFG_DIRECT_FLASH_TFTP
	125	int i, rc = 0;
	126
	127	for (i=0; i<CFG_MAX_FLASH_BANKS; i++) {
	128	/* start address in flash? */
be1b0d27 JF	129	if (flash_info[i].flash_id == FLASH_UNKNOWN)
be1b0d27 JF	130	continue;
fe8c2806 WD	131	if (load_addr + offset >= flash_info[i].start[0]) {
	132	rc = 1;
	133	break;
	134	}
	135	}
	136
	137	if (rc) { /* Flash is destination for this packet */
77ddac94	138	rc = flash_write ((char *)src, (ulong)(load_addr+offset), len);
fe8c2806 WD	139	if (rc) {
	140	flash_perror (rc);
	141	NetState = NETLOOP_FAIL;
	142	return;
	143	}
	144	}
	145	else
	146	#endif /* CFG_DIRECT_FLASH_TFTP */
	147	{
	148	(void)memcpy((void *)(load_addr + offset), src, len);
	149	}
53a5c424 DU	150	#ifdef CONFIG_MCAST_TFTP
	151	if (Multicast)
	152	ext2_set_bit(block, Bitmap);
	153	#endif
fe8c2806 WD	154
	155	if (NetBootFileXferSize < newsize)
	156	NetBootFileXferSize = newsize;
	157	}
	158
	159	static void TftpSend (void);
	160	static void TftpTimeout (void);
	161
	162	/**********************************************************************/
	163
	164	static void
	165	TftpSend (void)
	166	{
	167	volatile uchar * pkt;
	168	volatile uchar * xp;
	169	int len = 0;
7bc5ee07	170	volatile ushort *s;
fe8c2806	171
85eb5caf	172	#ifdef CONFIG_MCAST_TFTP
53a5c424	173	/* Multicast TFTP.. non-MasterClients do not ACK data. */
85eb5caf WD	174	if (Multicast
	175	&& (TftpState == STATE_DATA)
	176	&& (MasterClient == 0))
53a5c424 DU	177	return;
53a5c424 DU	178	#endif
fe8c2806 WD	179	/*
	180	* We will always be sending some sort of packet, so
	181	* cobble together the packet headers now.
	182	*/
a3d991bd	183	pkt = NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE;
fe8c2806 WD	184
	185	switch (TftpState) {
	186
	187	case STATE_RRQ:
	188	xp = pkt;
7bc5ee07 WD	189	s = (ushort *)pkt;
	190	*s++ = htons(TFTP_RRQ);
	191	pkt = (uchar *)s;
fe8c2806 WD	192	strcpy ((char *)pkt, tftp_filename);
	193	pkt += strlen(tftp_filename) + 1;
	194	strcpy ((char *)pkt, "octet");
	195	pkt += 5 /strlen("octet")/ + 1;
fbe4b5cb WD	196	strcpy ((char *)pkt, "timeout");
fbe4b5cb WD	197	pkt += 7 /strlen("timeout")/ + 1;
49f3bdbb	198	sprintf((char *)pkt, "%lu", TIMEOUT / 1000);
fbe4b5cb WD	199	#ifdef ET_DEBUG
	200	printf("send option \"timeout %s\"\n", (char *)pkt);
	201	#endif
	202	pkt += strlen((char *)pkt) + 1;
53a5c424 DU	203	/* try for more effic. blk size */
53a5c424 DU	204	pkt += sprintf((char *)pkt,"blksize%c%d%c",
ef8f2075	205	0,TftpBlkSizeOption,0);
85eb5caf	206	#ifdef CONFIG_MCAST_TFTP
53a5c424	207	/* Check all preconditions before even trying the option */
85eb5caf WD	208	if (!ProhibitMcast
85eb5caf WD	209	&& (Bitmap=malloc(Mapsize))
53a5c424 DU	210	&& eth_get_dev()->mcast) {
	211	free(Bitmap);
	212	Bitmap=NULL;
	213	pkt += sprintf((char *)pkt,"multicast%c%c",0,0);
	214	}
	215	#endif /* CONFIG_MCAST_TFTP */
fe8c2806 WD	216	len = pkt - xp;
	217	break;
	218
fbe4b5cb	219	case STATE_OACK:
53a5c424 DU	220	#ifdef CONFIG_MCAST_TFTP
	221	/* My turn! Start at where I need blocks I missed.*/
	222	if (Multicast)
	223	TftpBlock=ext2_find_next_zero_bit(Bitmap,(Mapsize*8),0);
	224	/..falling../
	225	#endif
	226	case STATE_DATA:
fe8c2806	227	xp = pkt;
7bc5ee07 WD	228	s = (ushort *)pkt;
	229	*s++ = htons(TFTP_ACK);
	230	*s++ = htons(TftpBlock);
	231	pkt = (uchar *)s;
fe8c2806 WD	232	len = pkt - xp;
	233	break;
	234
	235	case STATE_TOO_LARGE:
	236	xp = pkt;
7bc5ee07 WD	237	s = (ushort *)pkt;
	238	*s++ = htons(TFTP_ERROR);
	239	*s++ = htons(3);
	240	pkt = (uchar *)s;
fe8c2806 WD	241	strcpy ((char *)pkt, "File too large");
	242	pkt += 14 /strlen("File too large")/ + 1;
	243	len = pkt - xp;
	244	break;
	245
	246	case STATE_BAD_MAGIC:
	247	xp = pkt;
7bc5ee07 WD	248	s = (ushort *)pkt;
	249	*s++ = htons(TFTP_ERROR);
	250	*s++ = htons(2);
	251	pkt = (uchar *)s;
fe8c2806 WD	252	strcpy ((char *)pkt, "File has bad magic");
	253	pkt += 18 /strlen("File has bad magic")/ + 1;
	254	len = pkt - xp;
	255	break;
	256	}
	257
a93907c4	258	NetSendUDPPacket(NetServerEther, TftpServerIP, TftpServerPort, TftpOurPort, len);
fe8c2806 WD	259	}
	260
	261
	262	static void
	263	TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
	264	{
	265	ushort proto;
7bc5ee07	266	ushort *s;
ff13ac8c	267	int i;
fe8c2806 WD	268
fe8c2806 WD	269	if (dest != TftpOurPort) {
53a5c424	270	#ifdef CONFIG_MCAST_TFTP
85eb5caf	271	if (Multicast
53a5c424 DU	272	&& (!Mcast_port \|\| (dest != Mcast_port)))
53a5c424 DU	273	#endif
fe8c2806 WD	274	return;
	275	}
	276	if (TftpState != STATE_RRQ && src != TftpServerPort) {
	277	return;
	278	}
	279
	280	if (len < 2) {
	281	return;
	282	}
	283	len -= 2;
	284	/* warning: don't use increment (++) in ntohs() macros!! */
7bc5ee07 WD	285	s = (ushort *)pkt;
	286	proto = *s++;
	287	pkt = (uchar *)s;
fe8c2806 WD	288	switch (ntohs(proto)) {
	289
	290	case TFTP_RRQ:
	291	case TFTP_WRQ:
	292	case TFTP_ACK:
	293	break;
	294	default:
	295	break;
	296
fbe4b5cb WD	297	case TFTP_OACK:
fbe4b5cb WD	298	#ifdef ET_DEBUG
ff13ac8c	299	printf("Got OACK: %s %s\n", pkt, pkt+strlen(pkt)+1);
fbe4b5cb WD	300	#endif
	301	TftpState = STATE_OACK;
	302	TftpServerPort = src;
60174746 WD	303	/*
	304	* Check for 'blksize' option.
	305	* Careful: "i" is signed, "len" is unsigned, thus
	306	* something like "len-8" may give a huge number
	307	*/
	308	for (i=0; i+8<len; i++) {
ff13ac8c WD	309	if (strcmp ((char*)pkt+i,"blksize") == 0) {
	310	TftpBlkSize = (unsigned short)
	311	simple_strtoul((char*)pkt+i+8,NULL,10);
53a5c424	312	#ifdef ET_DEBUG
ff13ac8c WD	313	printf ("Blocksize ack: %s, %d\n",
ff13ac8c WD	314	(char*)pkt+i+8,TftpBlkSize);
53a5c424	315	#endif
ff13ac8c WD	316	break;
ff13ac8c WD	317	}
53a5c424 DU	318	}
	319	#ifdef CONFIG_MCAST_TFTP
	320	parse_multicast_oack((char *)pkt,len-1);
85eb5caf	321	if ((Multicast) && (!MasterClient))
53a5c424 DU	322	TftpState = STATE_DATA; /* passive.. */
	323	else
	324	#endif
fbe4b5cb WD	325	TftpSend (); /* Send ACK */
fbe4b5cb WD	326	break;
fe8c2806 WD	327	case TFTP_DATA:
	328	if (len < 2)
	329	return;
	330	len -= 2;
	331	TftpBlock = ntohs((ushort )pkt);
3f85ce27 WD	332
3f85ce27 WD	333	/*
cd0a9de6 WD	334	* RFC1350 specifies that the first data packet will
	335	* have sequence number 1. If we receive a sequence
	336	* number of 0 this means that there was a wrap
	337	* around of the (16 bit) counter.
3f85ce27 WD	338	*/
	339	if (TftpBlock == 0) {
	340	TftpBlockWrap++;
53a5c424	341	TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE;
ddd5d9da	342	printf ("\n\t %lu MB received\n\t ", TftpBlockWrapOffset>>20);
3f85ce27 WD	343	} else {
	344	if (((TftpBlock - 1) % 10) == 0) {
	345	putc ('#');
	346	} else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {
	347	puts ("\n\t ");
	348	}
fe8c2806 WD	349	}
fe8c2806 WD	350
fbe4b5cb	351	#ifdef ET_DEBUG
fe8c2806	352	if (TftpState == STATE_RRQ) {
4b9206ed	353	puts ("Server did not acknowledge timeout option!\n");
fbe4b5cb WD	354	}
	355	#endif
	356
	357	if (TftpState == STATE_RRQ \|\| TftpState == STATE_OACK) {
3f85ce27	358	/* first block received */
fe8c2806 WD	359	TftpState = STATE_DATA;
	360	TftpServerPort = src;
	361	TftpLastBlock = 0;
3f85ce27 WD	362	TftpBlockWrap = 0;
3f85ce27 WD	363	TftpBlockWrapOffset = 0;
fe8c2806	364
53a5c424 DU	365	#ifdef CONFIG_MCAST_TFTP
	366	if (Multicast) { /* start!=1 common if mcast */
	367	TftpLastBlock = TftpBlock - 1;
	368	} else
	369	#endif
fe8c2806 WD	370	if (TftpBlock != 1) { /* Assertion */
fe8c2806 WD	371	printf ("\nTFTP error: "
3f85ce27	372	"First block is not block 1 (%ld)\n"
fe8c2806 WD	373	"Starting again\n\n",
	374	TftpBlock);
	375	NetStartAgain ();
	376	break;
	377	}
	378	}
	379
	380	if (TftpBlock == TftpLastBlock) {
	381	/*
	382	* Same block again; ignore it.
	383	*/
	384	break;
	385	}
	386
	387	TftpLastBlock = TftpBlock;
e83cc063 BS	388	TftpTimeoutMSecs = TIMEOUT;
	389	TftpTimeoutCountMax = TIMEOUT_COUNT;
	390	NetSetTimeout (TftpTimeoutMSecs, TftpTimeout);
fe8c2806 WD	391
	392	store_block (TftpBlock - 1, pkt + 2, len);
	393
	394	/*
	395	* Acknoledge the block just received, which will prompt
	396	* the server for the next one.
	397	*/
53a5c424	398	#ifdef CONFIG_MCAST_TFTP
85eb5caf WD	399	/* if I am the MasterClient, actively calculate what my next
85eb5caf WD	400	* needed block is; else I'm passive; not ACKING
a93907c4	401	*/
53a5c424 DU	402	if (Multicast) {
	403	if (len < TftpBlkSize) {
	404	TftpEndingBlock = TftpBlock;
	405	} else if (MasterClient) {
85eb5caf	406	TftpBlock = PrevBitmapHole =
53a5c424 DU	407	ext2_find_next_zero_bit(
	408	Bitmap,
	409	(Mapsize*8),
	410	PrevBitmapHole);
	411	if (TftpBlock > ((Mapsize*8) - 1)) {
	412	printf ("tftpfile too big\n");
	413	/* try to double it and retry */
	414	Mapsize<<=1;
	415	mcast_cleanup();
	416	NetStartAgain ();
	417	return;
	418	}
	419	TftpLastBlock = TftpBlock;
	420	}
	421	}
	422	#endif
fe8c2806 WD	423	TftpSend ();
fe8c2806 WD	424
53a5c424 DU	425	#ifdef CONFIG_MCAST_TFTP
	426	if (Multicast) {
	427	if (MasterClient && (TftpBlock >= TftpEndingBlock)) {
	428	puts ("\nMulticast tftp done\n");
	429	mcast_cleanup();
	430	NetState = NETLOOP_SUCCESS;
85eb5caf	431	}
53a5c424 DU	432	}
	433	else
	434	#endif
	435	if (len < TftpBlkSize) {
fe8c2806 WD	436	/*
	437	* We received the whole thing. Try to
	438	* run it.
	439	*/
	440	puts ("\ndone\n");
	441	NetState = NETLOOP_SUCCESS;
	442	}
	443	break;
	444
	445	case TFTP_ERROR:
	446	printf ("\nTFTP error: '%s' (%d)\n",
	447	pkt + 2, ntohs((ushort )pkt));
	448	puts ("Starting again\n\n");
53a5c424 DU	449	#ifdef CONFIG_MCAST_TFTP
	450	mcast_cleanup();
	451	#endif
fe8c2806 WD	452	NetStartAgain ();
	453	break;
	454	}
	455	}
	456
	457
	458	static void
	459	TftpTimeout (void)
	460	{
e83cc063	461	if (++TftpTimeoutCount > TftpTimeoutCountMax) {
fe8c2806	462	puts ("\nRetry count exceeded; starting again\n");
53a5c424 DU	463	#ifdef CONFIG_MCAST_TFTP
	464	mcast_cleanup();
	465	#endif
fe8c2806 WD	466	NetStartAgain ();
	467	} else {
	468	puts ("T ");
e83cc063	469	NetSetTimeout (TftpTimeoutMSecs, TftpTimeout);
fe8c2806 WD	470	TftpSend ();
	471	}
	472	}
	473
	474
	475	void
	476	TftpStart (void)
	477	{
ecb0ccd9 WD	478	#ifdef CONFIG_TFTP_PORT
	479	char ep; / Environment pointer */
	480	#endif
	481
a93907c4	482	TftpServerIP = NetServerIP;
fe8c2806	483	if (BootFile[0] == '\0') {
fe8c2806	484	sprintf(default_filename, "%02lX%02lX%02lX%02lX.img",
c43352cc WD	485	NetOurIP & 0xFF,
	486	(NetOurIP >> 8) & 0xFF,
	487	(NetOurIP >> 16) & 0xFF,
	488	(NetOurIP >> 24) & 0xFF );
a93907c4 JCPV	489
	490	strncpy(tftp_filename, default_filename, MAX_LEN);
	491	tftp_filename[MAX_LEN-1] = 0;
fe8c2806 WD	492
	493	printf ("*** Warning: no boot file name; using '%s'\n",
	494	tftp_filename);
	495	} else {
38cc09c5	496	char *p = strchr (BootFile, ':');
a93907c4 JCPV	497
	498	if (p == NULL) {
	499	strncpy(tftp_filename, BootFile, MAX_LEN);
	500	tftp_filename[MAX_LEN-1] = 0;
	501	} else {
	502	*p++ = '\0';
	503	TftpServerIP = string_to_ip (BootFile);
	504	strncpy(tftp_filename, p, MAX_LEN);
	505	tftp_filename[MAX_LEN-1] = 0;
	506	}
fe8c2806 WD	507	}
fe8c2806 WD	508
5bb226e8 WD	509	#if defined(CONFIG_NET_MULTI)
	510	printf ("Using %s device\n", eth_get_name());
	511	#endif
a93907c4	512	puts ("TFTP from server "); print_IPaddr (TftpServerIP);
fe8c2806 WD	513	puts ("; our IP address is "); print_IPaddr (NetOurIP);
	514
	515	/* Check if we need to send across this subnet */
	516	if (NetOurGatewayIP && NetOurSubnetMask) {
a93907c4 JCPV	517	IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
a93907c4 JCPV	518	IPaddr_t ServerNet = TftpServerIP & NetOurSubnetMask;
fe8c2806 WD	519
	520	if (OurNet != ServerNet) {
	521	puts ("; sending through gateway ");
	522	print_IPaddr (NetOurGatewayIP) ;
	523	}
	524	}
	525	putc ('\n');
	526
	527	printf ("Filename '%s'.", tftp_filename);
	528
	529	if (NetBootFileSize) {
	530	printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
	531	print_size (NetBootFileSize<<9, "");
	532	}
	533
	534	putc ('\n');
	535
	536	printf ("Load address: 0x%lx\n", load_addr);
	537
	538	puts ("Loading: *\b");
	539
e83cc063 BS	540	TftpTimeoutMSecs = TftpRRQTimeoutMSecs;
	541	TftpTimeoutCountMax = TftpRRQTimeoutCountMax;
	542
	543	NetSetTimeout (TftpTimeoutMSecs, TftpTimeout);
fe8c2806 WD	544	NetSetHandler (TftpHandler);
	545
	546	TftpServerPort = WELL_KNOWN_PORT;
	547	TftpTimeoutCount = 0;
	548	TftpState = STATE_RRQ;
ecb0ccd9	549	/* Use a pseudo-random port unless a specific port is set */
fe8c2806	550	TftpOurPort = 1024 + (get_timer(0) % 3072);
53a5c424	551
ecb0ccd9	552	#ifdef CONFIG_TFTP_PORT
28cb9375 WD	553	if ((ep = getenv("tftpdstp")) != NULL) {
	554	TftpServerPort = simple_strtol(ep, NULL, 10);
	555	}
	556	if ((ep = getenv("tftpsrcp")) != NULL) {
ecb0ccd9 WD	557	TftpOurPort= simple_strtol(ep, NULL, 10);
	558	}
	559	#endif
fbe4b5cb	560	TftpBlock = 0;
fe8c2806	561
73a8b27c WD	562	/* zero out server ether in case the server ip has changed */
73a8b27c WD	563	memset(NetServerEther, 0, 6);
53a5c424 DU	564	/* Revert TftpBlkSize to dflt */
	565	TftpBlkSize = TFTP_BLOCK_SIZE;
	566	#ifdef CONFIG_MCAST_TFTP
a93907c4	567	mcast_cleanup();
53a5c424	568	#endif
73a8b27c	569
fe8c2806 WD	570	TftpSend ();
	571	}
	572
53a5c424 DU	573	#ifdef CONFIG_MCAST_TFTP
	574	/* Credits: atftp project.
	575	*/
	576
	577	/* pick up BcastAddr, Port, and whether I am [now] the master-client. *
	578	* Frame:
	579	* +-------+-----------+---+-------~~-------+---+
	580	* \| opc \| multicast \| 0 \| addr, port, mc \| 0 \|
	581	* +-------+-----------+---+-------~~-------+---+
	582	* The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
	583	* I am the new master-client so must send ACKs to DataBlocks. If I am not
	584	* master-client, I'm a passive client, gathering what DataBlocks I may and
	585	* making note of which ones I got in my bitmask.
	586	* In theory, I never go from master->passive..
	587	* .. this comes in with pkt already pointing just past opc
	588	*/
	589	static void parse_multicast_oack(char *pkt, int len)
	590	{
	591	int i;
	592	IPaddr_t addr;
	593	char mc_adr, port, *mc;
	594
	595	mc_adr=port=mc=NULL;
	596	/* march along looking for 'multicast\0', which has to start at least
	597	* 14 bytes back from the end.
	598	*/
	599	for (i=0;i<len-14;i++)
	600	if (strcmp (pkt+i,"multicast") == 0)
	601	break;
	602	if (i >= (len-14)) /* non-Multicast OACK, ign. */
	603	return;
85eb5caf	604
53a5c424 DU	605	i+=10; /* strlen multicast */
	606	mc_adr = pkt+i;
	607	for (;i<len;i++) {
	608	if (*(pkt+i) == ',') {
	609	*(pkt+i) = '\0';
	610	if (port) {
	611	mc = pkt+i+1;
	612	break;
	613	} else {
	614	port = pkt+i+1;
	615	}
	616	}
	617	}
	618	if (!port \|\| !mc_adr \|\| !mc ) return;
	619	if (Multicast && MasterClient) {
	620	printf ("I got a OACK as master Client, WRONG!\n");
	621	return;
	622	}
	623	/* ..I now accept packets destined for this MCAST addr, port */
	624	if (!Multicast) {
	625	if (Bitmap) {
	626	printf ("Internal failure! no mcast.\n");
	627	free(Bitmap);
	628	Bitmap=NULL;
	629	ProhibitMcast=1;
	630	return ;
	631	}
	632	/* I malloc instead of pre-declare; so that if the file ends
85eb5caf WD	633	* up being too big for this bitmap I can retry
85eb5caf WD	634	*/
53a5c424 DU	635	if (!(Bitmap = malloc (Mapsize))) {
	636	printf ("No Bitmap, no multicast. Sorry.\n");
	637	ProhibitMcast=1;
	638	return;
	639	}
	640	memset (Bitmap,0,Mapsize);
	641	PrevBitmapHole = 0;
	642	Multicast = 1;
	643	}
	644	addr = string_to_ip(mc_adr);
	645	if (Mcast_addr != addr) {
	646	if (Mcast_addr)
	647	eth_mcast_join(Mcast_addr, 0);
	648	if (eth_mcast_join(Mcast_addr=addr, 1)) {
	649	printf ("Fail to set mcast, revert to TFTP\n");
	650	ProhibitMcast=1;
	651	mcast_cleanup();
	652	NetStartAgain();
	653	}
	654	}
	655	MasterClient = (unsigned char)simple_strtoul((char *)mc,NULL,10);
	656	Mcast_port = (unsigned short)simple_strtoul(port,NULL,10);
	657	printf ("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient);
	658	return;
	659	}
	660
	661	#endif /* Multicast TFTP */
	662
30b52df9	663	#endif