[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 (CONFIG_COMMANDS & CFG_CMD_NET)

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

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


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

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

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

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

#ifdef CFG_DIRECT_FLASH_TFTP
extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
#endif

static __inline__ void
store_block (unsigned block, uchar * src, unsigned len)
{
	ulong offset = block * TFTP_BLOCK_SIZE + 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 ((uchar *)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);
	}

	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;

	/*
	 *	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;
		*((ushort *)pkt)++ = htons(TFTP_RRQ);
		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;
		len = pkt - xp;
		break;

	case STATE_DATA:
	case STATE_OACK:
		xp = pkt;
		*((ushort *)pkt)++ = htons(TFTP_ACK);
		*((ushort *)pkt)++ = htons(TftpBlock);
		len = pkt - xp;
		break;

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

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

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


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

	if (dest != TftpOurPort) {
		return;
	}
	if (TftpState != STATE_RRQ && src != TftpServerPort) {
		return;
	}

	if (len < 2) {
		return;
	}
	len -= 2;
	/* warning: don't use increment (++) in ntohs() macros!! */
	proto = *((ushort *)pkt)++;
	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;
		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 += TFTP_BLOCK_SIZE * TFTP_SEQUENCE_SIZE;
			printf ("\n\t %lu MB reveived\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;

			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.
		 */
		TftpSend ();

		if (len < TFTP_BLOCK_SIZE) {
			/*
			 *	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");
		NetStartAgain ();
		break;
	}
}


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


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

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

#if defined(CONFIG_NET_MULTI)
	printf ("Using %s device\n", eth_get_name());
#endif
	puts ("TFTP from server ");	print_IPaddr (NetServerIP);
	puts ("; our IP address is ");	print_IPaddr (NetOurIP);

	/* Check if we need to send across this subnet */
	if (NetOurGatewayIP && NetOurSubnetMask) {
	    IPaddr_t OurNet 	= NetOurIP    & NetOurSubnetMask;
	    IPaddr_t ServerNet 	= NetServerIP & NetOurSubnetMask;

	    if (OurNet != ServerNet) {
		puts ("; sending through gateway ");
		print_IPaddr (NetOurGatewayIP) ;
	    }
	}
	putc ('\n');

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

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

	putc ('\n');

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

	puts ("Loading: *\b");

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

	TftpServerPort = WELL_KNOWN_PORT;
	TftpTimeoutCount = 0;
	TftpState = STATE_RRQ;
	TftpOurPort = 1024 + (get_timer(0) % 3072);
	TftpBlock = 0;

	/* zero out server ether in case the server ip has changed */
	memset(NetServerEther, 0, 6);

	TftpSend ();
}

#endif /* CFG_CMD_NET */
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
	15	#if (CONFIG_COMMANDS & CFG_CMD_NET)
	16
	17	#define WELL_KNOWN_PORT 69 /* Well known TFTP port # */
fbe4b5cb	18	#define TIMEOUT 5 /* Seconds to timeout for a lost pkt */
fe8c2806 WD	19	#ifndef CONFIG_NET_RETRY_COUNT
	20	# define TIMEOUT_COUNT 10 /* # of timeouts before giving up */
	21	#else
	22	# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2)
	23	#endif
	24	/* (for checking the image size) */
	25	#define HASHES_PER_LINE 65 /* Number of "loading" hashes per line */
	26
	27	/*
	28	* TFTP operations.
	29	*/
	30	#define TFTP_RRQ 1
	31	#define TFTP_WRQ 2
	32	#define TFTP_DATA 3
	33	#define TFTP_ACK 4
	34	#define TFTP_ERROR 5
fbe4b5cb	35	#define TFTP_OACK 6
fe8c2806 WD	36
	37
	38	static int TftpServerPort; /* The UDP port at their end */
	39	static int TftpOurPort; /* The UDP port at our end */
	40	static int TftpTimeoutCount;
3f85ce27 WD	41	static ulong TftpBlock; /* packet sequence number */
	42	static ulong TftpLastBlock; /* last packet sequence number received */
	43	static ulong TftpBlockWrap; /* count of sequence number wraparounds */
	44	static ulong TftpBlockWrapOffset; /* memory offset due to wrapping */
fe8c2806	45	static int TftpState;
3f85ce27	46
fe8c2806 WD	47	#define STATE_RRQ 1
	48	#define STATE_DATA 2
	49	#define STATE_TOO_LARGE 3
	50	#define STATE_BAD_MAGIC 4
fbe4b5cb	51	#define STATE_OACK 5
fe8c2806	52
3f85ce27 WD	53	#define TFTP_BLOCK_SIZE 512 /* default TFTP block size */
	54	#define TFTP_SEQUENCE_SIZE ((ulong)(1<<16)) /* sequence number is 16 bit */
	55
fe8c2806 WD	56	#define DEFAULT_NAME_LEN (8 + 4 + 1)
	57	static char default_filename[DEFAULT_NAME_LEN];
	58	static char *tftp_filename;
	59
	60	#ifdef CFG_DIRECT_FLASH_TFTP
	61	extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
	62	#endif
	63
	64	static __inline__ void
	65	store_block (unsigned block, uchar * src, unsigned len)
	66	{
3f85ce27 WD	67	ulong offset = block * TFTP_BLOCK_SIZE + TftpBlockWrapOffset;
3f85ce27 WD	68	ulong newsize = offset + len;
fe8c2806 WD	69	#ifdef CFG_DIRECT_FLASH_TFTP
	70	int i, rc = 0;
	71
	72	for (i=0; i<CFG_MAX_FLASH_BANKS; i++) {
	73	/* start address in flash? */
	74	if (load_addr + offset >= flash_info[i].start[0]) {
	75	rc = 1;
	76	break;
	77	}
	78	}
	79
	80	if (rc) { /* Flash is destination for this packet */
	81	rc = flash_write ((uchar *)src, (ulong)(load_addr+offset), len);
	82	if (rc) {
	83	flash_perror (rc);
	84	NetState = NETLOOP_FAIL;
	85	return;
	86	}
	87	}
	88	else
	89	#endif /* CFG_DIRECT_FLASH_TFTP */
	90	{
	91	(void)memcpy((void *)(load_addr + offset), src, len);
	92	}
	93
	94	if (NetBootFileXferSize < newsize)
	95	NetBootFileXferSize = newsize;
	96	}
	97
	98	static void TftpSend (void);
	99	static void TftpTimeout (void);
	100
	101	/**********************************************************************/
	102
	103	static void
	104	TftpSend (void)
	105	{
	106	volatile uchar * pkt;
	107	volatile uchar * xp;
	108	int len = 0;
	109
	110	/*
	111	* We will always be sending some sort of packet, so
	112	* cobble together the packet headers now.
	113	*/
a3d991bd	114	pkt = NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE;
fe8c2806 WD	115
	116	switch (TftpState) {
	117
	118	case STATE_RRQ:
	119	xp = pkt;
	120	((ushort )pkt)++ = htons(TFTP_RRQ);
	121	strcpy ((char *)pkt, tftp_filename);
	122	pkt += strlen(tftp_filename) + 1;
	123	strcpy ((char *)pkt, "octet");
	124	pkt += 5 /strlen("octet")/ + 1;
fbe4b5cb WD	125	strcpy ((char *)pkt, "timeout");
	126	pkt += 7 /strlen("timeout")/ + 1;
	127	sprintf((char *)pkt, "%d", TIMEOUT);
	128	#ifdef ET_DEBUG
	129	printf("send option \"timeout %s\"\n", (char *)pkt);
	130	#endif
	131	pkt += strlen((char *)pkt) + 1;
fe8c2806 WD	132	len = pkt - xp;
	133	break;
	134
	135	case STATE_DATA:
fbe4b5cb	136	case STATE_OACK:
fe8c2806 WD	137	xp = pkt;
	138	((ushort )pkt)++ = htons(TFTP_ACK);
	139	((ushort )pkt)++ = htons(TftpBlock);
	140	len = pkt - xp;
	141	break;
	142
	143	case STATE_TOO_LARGE:
	144	xp = pkt;
	145	((ushort )pkt)++ = htons(TFTP_ERROR);
	146	((ushort )pkt)++ = htons(3);
	147	strcpy ((char *)pkt, "File too large");
	148	pkt += 14 /strlen("File too large")/ + 1;
	149	len = pkt - xp;
	150	break;
	151
	152	case STATE_BAD_MAGIC:
	153	xp = pkt;
	154	((ushort )pkt)++ = htons(TFTP_ERROR);
	155	((ushort )pkt)++ = htons(2);
	156	strcpy ((char *)pkt, "File has bad magic");
	157	pkt += 18 /strlen("File has bad magic")/ + 1;
	158	len = pkt - xp;
	159	break;
	160	}
	161
73a8b27c	162	NetSendUDPPacket(NetServerEther, NetServerIP, TftpServerPort, TftpOurPort, len);
fe8c2806 WD	163	}
	164
	165
	166	static void
	167	TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
	168	{
	169	ushort proto;
	170
	171	if (dest != TftpOurPort) {
	172	return;
	173	}
	174	if (TftpState != STATE_RRQ && src != TftpServerPort) {
	175	return;
	176	}
	177
	178	if (len < 2) {
	179	return;
	180	}
	181	len -= 2;
	182	/* warning: don't use increment (++) in ntohs() macros!! */
	183	proto = ((ushort )pkt)++;
	184	switch (ntohs(proto)) {
	185
	186	case TFTP_RRQ:
	187	case TFTP_WRQ:
	188	case TFTP_ACK:
	189	break;
	190	default:
	191	break;
	192
fbe4b5cb WD	193	case TFTP_OACK:
	194	#ifdef ET_DEBUG
	195	printf("Got OACK: %s %s\n", pkt, pkt+strlen(pkt)+1);
	196	#endif
	197	TftpState = STATE_OACK;
	198	TftpServerPort = src;
	199	TftpSend (); /* Send ACK */
	200	break;
fe8c2806 WD	201	case TFTP_DATA:
	202	if (len < 2)
	203	return;
	204	len -= 2;
	205	TftpBlock = ntohs((ushort )pkt);
3f85ce27 WD	206
3f85ce27 WD	207	/*
cd0a9de6 WD	208	* RFC1350 specifies that the first data packet will
	209	* have sequence number 1. If we receive a sequence
	210	* number of 0 this means that there was a wrap
	211	* around of the (16 bit) counter.
3f85ce27 WD	212	*/
	213	if (TftpBlock == 0) {
	214	TftpBlockWrap++;
	215	TftpBlockWrapOffset += TFTP_BLOCK_SIZE * TFTP_SEQUENCE_SIZE;
	216	printf ("\n\t %lu MB reveived\n\t ", TftpBlockWrapOffset>>20);
	217	} else {
	218	if (((TftpBlock - 1) % 10) == 0) {
	219	putc ('#');
	220	} else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {
	221	puts ("\n\t ");
	222	}
fe8c2806 WD	223	}
fe8c2806 WD	224
fbe4b5cb	225	#ifdef ET_DEBUG
fe8c2806	226	if (TftpState == STATE_RRQ) {
4b9206ed	227	puts ("Server did not acknowledge timeout option!\n");
fbe4b5cb WD	228	}
	229	#endif
	230
	231	if (TftpState == STATE_RRQ \|\| TftpState == STATE_OACK) {
3f85ce27	232	/* first block received */
fe8c2806 WD	233	TftpState = STATE_DATA;
	234	TftpServerPort = src;
	235	TftpLastBlock = 0;
3f85ce27 WD	236	TftpBlockWrap = 0;
3f85ce27 WD	237	TftpBlockWrapOffset = 0;
fe8c2806 WD	238
	239	if (TftpBlock != 1) { /* Assertion */
	240	printf ("\nTFTP error: "
3f85ce27	241	"First block is not block 1 (%ld)\n"
fe8c2806 WD	242	"Starting again\n\n",
	243	TftpBlock);
	244	NetStartAgain ();
	245	break;
	246	}
	247	}
	248
	249	if (TftpBlock == TftpLastBlock) {
	250	/*
	251	* Same block again; ignore it.
	252	*/
	253	break;
	254	}
	255
	256	TftpLastBlock = TftpBlock;
	257	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	258
	259	store_block (TftpBlock - 1, pkt + 2, len);
	260
	261	/*
	262	* Acknoledge the block just received, which will prompt
	263	* the server for the next one.
	264	*/
	265	TftpSend ();
	266
3f85ce27	267	if (len < TFTP_BLOCK_SIZE) {
fe8c2806 WD	268	/*
	269	* We received the whole thing. Try to
	270	* run it.
	271	*/
	272	puts ("\ndone\n");
	273	NetState = NETLOOP_SUCCESS;
	274	}
	275	break;
	276
	277	case TFTP_ERROR:
	278	printf ("\nTFTP error: '%s' (%d)\n",
	279	pkt + 2, ntohs((ushort )pkt));
	280	puts ("Starting again\n\n");
	281	NetStartAgain ();
	282	break;
	283	}
	284	}
	285
	286
	287	static void
	288	TftpTimeout (void)
	289	{
e0ac62d7	290	if (++TftpTimeoutCount > TIMEOUT_COUNT) {
fe8c2806 WD	291	puts ("\nRetry count exceeded; starting again\n");
	292	NetStartAgain ();
	293	} else {
	294	puts ("T ");
	295	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	296	TftpSend ();
	297	}
	298	}
	299
	300
	301	void
	302	TftpStart (void)
	303	{
fe8c2806	304	if (BootFile[0] == '\0') {
fe8c2806	305	sprintf(default_filename, "%02lX%02lX%02lX%02lX.img",
c43352cc WD	306	NetOurIP & 0xFF,
	307	(NetOurIP >> 8) & 0xFF,
	308	(NetOurIP >> 16) & 0xFF,
	309	(NetOurIP >> 24) & 0xFF );
fe8c2806 WD	310	tftp_filename = default_filename;
	311
	312	printf ("*** Warning: no boot file name; using '%s'\n",
	313	tftp_filename);
	314	} else {
	315	tftp_filename = BootFile;
	316	}
	317
5bb226e8 WD	318	#if defined(CONFIG_NET_MULTI)
	319	printf ("Using %s device\n", eth_get_name());
	320	#endif
fe8c2806 WD	321	puts ("TFTP from server "); print_IPaddr (NetServerIP);
	322	puts ("; our IP address is "); print_IPaddr (NetOurIP);
	323
	324	/* Check if we need to send across this subnet */
	325	if (NetOurGatewayIP && NetOurSubnetMask) {
	326	IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
	327	IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask;
	328
	329	if (OurNet != ServerNet) {
	330	puts ("; sending through gateway ");
	331	print_IPaddr (NetOurGatewayIP) ;
	332	}
	333	}
	334	putc ('\n');
	335
	336	printf ("Filename '%s'.", tftp_filename);
	337
	338	if (NetBootFileSize) {
	339	printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
	340	print_size (NetBootFileSize<<9, "");
	341	}
	342
	343	putc ('\n');
	344
	345	printf ("Load address: 0x%lx\n", load_addr);
	346
	347	puts ("Loading: *\b");
	348
	349	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	350	NetSetHandler (TftpHandler);
	351
	352	TftpServerPort = WELL_KNOWN_PORT;
	353	TftpTimeoutCount = 0;
	354	TftpState = STATE_RRQ;
	355	TftpOurPort = 1024 + (get_timer(0) % 3072);
fbe4b5cb	356	TftpBlock = 0;
fe8c2806	357
73a8b27c WD	358	/* zero out server ether in case the server ip has changed */
	359	memset(NetServerEther, 0, 6);
	360
fe8c2806 WD	361	TftpSend ();
	362	}
	363
	364	#endif /* CFG_CMD_NET */