[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		2		/* 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


static int	TftpServerPort;		/* The UDP port at their end		*/
static int	TftpOurPort;		/* The UDP port at our end		*/
static int	TftpTimeoutCount;
static unsigned	TftpBlock;
static unsigned	TftpLastBlock;
static int	TftpState;
#define STATE_RRQ	1
#define STATE_DATA	2
#define STATE_TOO_LARGE	3
#define STATE_BAD_MAGIC	4

#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 * 512, 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 + ETHER_HDR_SIZE + 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;
		len = pkt - xp;
		break;

	case STATE_DATA:
		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_DATA:
		if (len < 2)
			return;
		len -= 2;
		TftpBlock = ntohs(*(ushort *)pkt);
		if (((TftpBlock - 1) % 10) == 0) {
			putc ('#');
		} else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {
			puts ("\n\t ");
		}

		if (TftpState == STATE_RRQ) {
			TftpState = STATE_DATA;
			TftpServerPort = src;
			TftpLastBlock = 0;

			if (TftpBlock != 1) {	/* Assertion */
				printf ("\nTFTP error: "
					"First block is not block 1 (%d)\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 < 512) {
			/*
			 *	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') {
		IPaddr_t OurIP = ntohl(NetOurIP);

		sprintf(default_filename, "%02lX%02lX%02lX%02lX.img",
			OurIP & 0xFF,
			(OurIP >>  8) & 0xFF,
			(OurIP >> 16) & 0xFF,
			(OurIP >> 24) & 0xFF	);
		tftp_filename = default_filename;

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

	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);

	/* 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 # */
	18	#define TIMEOUT 2 /* Seconds to timeout for a lost pkt */
	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
	35
	36
	37	static int TftpServerPort; /* The UDP port at their end */
	38	static int TftpOurPort; /* The UDP port at our end */
	39	static int TftpTimeoutCount;
	40	static unsigned TftpBlock;
	41	static unsigned TftpLastBlock;
	42	static int TftpState;
	43	#define STATE_RRQ 1
	44	#define STATE_DATA 2
	45	#define STATE_TOO_LARGE 3
	46	#define STATE_BAD_MAGIC 4
	47
	48	#define DEFAULT_NAME_LEN (8 + 4 + 1)
	49	static char default_filename[DEFAULT_NAME_LEN];
	50	static char *tftp_filename;
	51
	52	#ifdef CFG_DIRECT_FLASH_TFTP
	53	extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
	54	#endif
	55
	56	static __inline__ void
	57	store_block (unsigned block, uchar * src, unsigned len)
	58	{
	59	ulong offset = block * 512, newsize = offset + len;
	60	#ifdef CFG_DIRECT_FLASH_TFTP
	61	int i, rc = 0;
	62
	63	for (i=0; i<CFG_MAX_FLASH_BANKS; i++) {
	64	/* start address in flash? */
65	if (load_addr + offset >= flash_info[i].start[0]) {
66	rc = 1;
67	break;
68	}
69	}
70
71	if (rc) { /* Flash is destination for this packet */
72	rc = flash_write ((uchar *)src, (ulong)(load_addr+offset), len);
73	if (rc) {
74	flash_perror (rc);
75	NetState = NETLOOP_FAIL;
76	return;
77	}
78	}
79	else
80	#endif /* CFG_DIRECT_FLASH_TFTP */
81	{
82	(void)memcpy((void *)(load_addr + offset), src, len);
83	}
84
85	if (NetBootFileXferSize < newsize)
86	NetBootFileXferSize = newsize;
87	}
88
89	static void TftpSend (void);
90	static void TftpTimeout (void);
91
92	/**********************************************************************/
93
94	static void
95	TftpSend (void)
96	{
97	volatile uchar * pkt;
98	volatile uchar * xp;
99	int len = 0;
100
101	/*
102	* We will always be sending some sort of packet, so
103	* cobble together the packet headers now.
104	*/
105	pkt = NetTxPacket + ETHER_HDR_SIZE + IP_HDR_SIZE;
106
107	switch (TftpState) {
108
109	case STATE_RRQ:
110	xp = pkt;
111	((ushort )pkt)++ = htons(TFTP_RRQ);
112	strcpy ((char *)pkt, tftp_filename);
113	pkt += strlen(tftp_filename) + 1;
114	strcpy ((char *)pkt, "octet");
115	pkt += 5 /strlen("octet")/ + 1;
116	len = pkt - xp;
117	break;
118
119	case STATE_DATA:
120	xp = pkt;
121	((ushort )pkt)++ = htons(TFTP_ACK);
122	((ushort )pkt)++ = htons(TftpBlock);
123	len = pkt - xp;
124	break;
125
126	case STATE_TOO_LARGE:
127	xp = pkt;
128	((ushort )pkt)++ = htons(TFTP_ERROR);
129	((ushort )pkt)++ = htons(3);
130	strcpy ((char *)pkt, "File too large");
131	pkt += 14 /strlen("File too large")/ + 1;
132	len = pkt - xp;
133	break;
134
135	case STATE_BAD_MAGIC:
136	xp = pkt;
137	((ushort )pkt)++ = htons(TFTP_ERROR);
138	((ushort )pkt)++ = htons(2);
139	strcpy ((char *)pkt, "File has bad magic");
140	pkt += 18 /strlen("File has bad magic")/ + 1;
141	len = pkt - xp;
142	break;
143	}
144
73a8b27c	145	NetSendUDPPacket(NetServerEther, NetServerIP, TftpServerPort, TftpOurPort, len);
fe8c2806 WD	146	}
	147
	148
	149	static void
	150	TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
	151	{
	152	ushort proto;
	153
	154	if (dest != TftpOurPort) {
	155	return;
	156	}
	157	if (TftpState != STATE_RRQ && src != TftpServerPort) {
	158	return;
	159	}
	160
	161	if (len < 2) {
	162	return;
	163	}
	164	len -= 2;
	165	/* warning: don't use increment (++) in ntohs() macros!! */
	166	proto = ((ushort )pkt)++;
	167	switch (ntohs(proto)) {
	168
	169	case TFTP_RRQ:
	170	case TFTP_WRQ:
	171	case TFTP_ACK:
	172	break;
	173	default:
	174	break;
	175
	176	case TFTP_DATA:
	177	if (len < 2)
	178	return;
	179	len -= 2;
	180	TftpBlock = ntohs((ushort )pkt);
	181	if (((TftpBlock - 1) % 10) == 0) {
	182	putc ('#');
	183	} else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) {
	184	puts ("\n\t ");
	185	}
	186
	187	if (TftpState == STATE_RRQ) {
	188	TftpState = STATE_DATA;
	189	TftpServerPort = src;
	190	TftpLastBlock = 0;
	191
	192	if (TftpBlock != 1) { /* Assertion */
	193	printf ("\nTFTP error: "
	194	"First block is not block 1 (%d)\n"
	195	"Starting again\n\n",
	196	TftpBlock);
	197	NetStartAgain ();
	198	break;
	199	}
	200	}
	201
	202	if (TftpBlock == TftpLastBlock) {
	203	/*
	204	* Same block again; ignore it.
	205	*/
	206	break;
	207	}
	208
	209	TftpLastBlock = TftpBlock;
210	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
211
212	store_block (TftpBlock - 1, pkt + 2, len);
213
214	/*
215	* Acknoledge the block just received, which will prompt
216	* the server for the next one.
217	*/
218	TftpSend ();
219
220	if (len < 512) {
221	/*
222	* We received the whole thing. Try to
223	* run it.
224	*/
225	puts ("\ndone\n");
226	NetState = NETLOOP_SUCCESS;
227	}
228	break;
229
230	case TFTP_ERROR:
231	printf ("\nTFTP error: '%s' (%d)\n",
232	pkt + 2, ntohs((ushort )pkt));
233	puts ("Starting again\n\n");
234	NetStartAgain ();
235	break;
236	}
237	}
238
239
240	static void
241	TftpTimeout (void)
242	{
e0ac62d7	243	if (++TftpTimeoutCount > TIMEOUT_COUNT) {
fe8c2806 WD	244	puts ("\nRetry count exceeded; starting again\n");
	245	NetStartAgain ();
	246	} else {
	247	puts ("T ");
	248	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	249	TftpSend ();
	250	}
	251	}
	252
	253
	254	void
	255	TftpStart (void)
	256	{
fe8c2806 WD	257	if (BootFile[0] == '\0') {
	258	IPaddr_t OurIP = ntohl(NetOurIP);
	259
	260	sprintf(default_filename, "%02lX%02lX%02lX%02lX.img",
	261	OurIP & 0xFF,
	262	(OurIP >> 8) & 0xFF,
	263	(OurIP >> 16) & 0xFF,
	264	(OurIP >> 24) & 0xFF );
	265	tftp_filename = default_filename;
	266
	267	printf ("*** Warning: no boot file name; using '%s'\n",
	268	tftp_filename);
	269	} else {
	270	tftp_filename = BootFile;
	271	}
	272
	273	puts ("TFTP from server "); print_IPaddr (NetServerIP);
	274	puts ("; our IP address is "); print_IPaddr (NetOurIP);
	275
	276	/* Check if we need to send across this subnet */
	277	if (NetOurGatewayIP && NetOurSubnetMask) {
	278	IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
	279	IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask;
	280
	281	if (OurNet != ServerNet) {
	282	puts ("; sending through gateway ");
	283	print_IPaddr (NetOurGatewayIP) ;
	284	}
	285	}
	286	putc ('\n');
	287
	288	printf ("Filename '%s'.", tftp_filename);
	289
	290	if (NetBootFileSize) {
	291	printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9);
	292	print_size (NetBootFileSize<<9, "");
	293	}
	294
	295	putc ('\n');
	296
	297	printf ("Load address: 0x%lx\n", load_addr);
	298
	299	puts ("Loading: *\b");
	300
	301	NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout);
	302	NetSetHandler (TftpHandler);
	303
	304	TftpServerPort = WELL_KNOWN_PORT;
	305	TftpTimeoutCount = 0;
	306	TftpState = STATE_RRQ;
	307	TftpOurPort = 1024 + (get_timer(0) % 3072);
	308
73a8b27c WD	309	/* zero out server ether in case the server ip has changed */
	310	memset(NetServerEther, 0, 6);
	311
fe8c2806 WD	312	TftpSend ();
	313	}
	314
	315	#endif /* CFG_CMD_NET */