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1 /*
2 * Copyright 1994, 1995, 2000 Neil Russell.
3 * (See License)
4 * Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, wd@denx.de
5 * Copyright 2011 Comelit Group SpA,
6 * Luca Ceresoli <luca.ceresoli@comelit.it>
7 */
8
9 #include <common.h>
10 #include <command.h>
11 #include <net.h>
12 #include "tftp.h"
13 #include "bootp.h"
14
15 /* Well known TFTP port # */
16 #define WELL_KNOWN_PORT 69
17 /* Millisecs to timeout for lost pkt */
18 #define TIMEOUT 5000UL
19 #ifndef CONFIG_NET_RETRY_COUNT
20 /* # of timeouts before giving up */
21 # define TIMEOUT_COUNT 10
22 #else
23 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2)
24 #endif
25 /* Number of "loading" hashes per line (for checking the image size) */
26 #define HASHES_PER_LINE 65
27
28 /*
29 * TFTP operations.
30 */
31 #define TFTP_RRQ 1
32 #define TFTP_WRQ 2
33 #define TFTP_DATA 3
34 #define TFTP_ACK 4
35 #define TFTP_ERROR 5
36 #define TFTP_OACK 6
37
38 static ulong TftpTimeoutMSecs = TIMEOUT;
39 static int TftpTimeoutCountMax = TIMEOUT_COUNT;
40
41 /*
42 * These globals govern the timeout behavior when attempting a connection to a
43 * TFTP server. TftpRRQTimeoutMSecs specifies the number of milliseconds to
44 * wait for the server to respond to initial connection. Second global,
45 * TftpRRQTimeoutCountMax, gives the number of such connection retries.
46 * TftpRRQTimeoutCountMax must be non-negative and TftpRRQTimeoutMSecs must be
47 * positive. The globals are meant to be set (and restored) by code needing
48 * non-standard timeout behavior when initiating a TFTP transfer.
49 */
50 ulong TftpRRQTimeoutMSecs = TIMEOUT;
51 int TftpRRQTimeoutCountMax = TIMEOUT_COUNT;
52
53 enum {
54 TFTP_ERR_UNDEFINED = 0,
55 TFTP_ERR_FILE_NOT_FOUND = 1,
56 TFTP_ERR_ACCESS_DENIED = 2,
57 TFTP_ERR_DISK_FULL = 3,
58 TFTP_ERR_UNEXPECTED_OPCODE = 4,
59 TFTP_ERR_UNKNOWN_TRANSFER_ID = 5,
60 TFTP_ERR_FILE_ALREADY_EXISTS = 6,
61 };
62
63 static IPaddr_t TftpRemoteIP;
64 /* The UDP port at their end */
65 static int TftpRemotePort;
66 /* The UDP port at our end */
67 static int TftpOurPort;
68 static int TftpTimeoutCount;
69 /* packet sequence number */
70 static ulong TftpBlock;
71 /* last packet sequence number received */
72 static ulong TftpLastBlock;
73 /* count of sequence number wraparounds */
74 static ulong TftpBlockWrap;
75 /* memory offset due to wrapping */
76 static ulong TftpBlockWrapOffset;
77 static int TftpState;
78 #ifdef CONFIG_TFTP_TSIZE
79 /* The file size reported by the server */
80 static int TftpTsize;
81 /* The number of hashes we printed */
82 static short TftpNumchars;
83 #endif
84
85 #define STATE_SEND_RRQ 1
86 #define STATE_DATA 2
87 #define STATE_TOO_LARGE 3
88 #define STATE_BAD_MAGIC 4
89 #define STATE_OACK 5
90 #define STATE_RECV_WRQ 6
91
92 /* default TFTP block size */
93 #define TFTP_BLOCK_SIZE 512
94 /* sequence number is 16 bit */
95 #define TFTP_SEQUENCE_SIZE ((ulong)(1<<16))
96
97 #define DEFAULT_NAME_LEN (8 + 4 + 1)
98 static char default_filename[DEFAULT_NAME_LEN];
99
100 #ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
101 #define MAX_LEN 128
102 #else
103 #define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
104 #endif
105
106 static char tftp_filename[MAX_LEN];
107
108 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
109 extern flash_info_t flash_info[];
110 #endif
111
112 /* 512 is poor choice for ethernet, MTU is typically 1500.
113 * Minus eth.hdrs thats 1468. Can get 2x better throughput with
114 * almost-MTU block sizes. At least try... fall back to 512 if need be.
115 * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file)
116 */
117 #ifdef CONFIG_TFTP_BLOCKSIZE
118 #define TFTP_MTU_BLOCKSIZE CONFIG_TFTP_BLOCKSIZE
119 #else
120 #define TFTP_MTU_BLOCKSIZE 1468
121 #endif
122
123 static unsigned short TftpBlkSize = TFTP_BLOCK_SIZE;
124 static unsigned short TftpBlkSizeOption = TFTP_MTU_BLOCKSIZE;
125
126 #ifdef CONFIG_MCAST_TFTP
127 #include <malloc.h>
128 #define MTFTP_BITMAPSIZE 0x1000
129 static unsigned *Bitmap;
130 static int PrevBitmapHole, Mapsize = MTFTP_BITMAPSIZE;
131 static uchar ProhibitMcast, MasterClient;
132 static uchar Multicast;
133 extern IPaddr_t Mcast_addr;
134 static int Mcast_port;
135 static ulong TftpEndingBlock; /* can get 'last' block before done..*/
136
137 static void parse_multicast_oack(char *pkt, int len);
138
139 static void
140 mcast_cleanup(void)
141 {
142 if (Mcast_addr)
143 eth_mcast_join(Mcast_addr, 0);
144 if (Bitmap)
145 free(Bitmap);
146 Bitmap = NULL;
147 Mcast_addr = Multicast = Mcast_port = 0;
148 TftpEndingBlock = -1;
149 }
150
151 #endif /* CONFIG_MCAST_TFTP */
152
153 static __inline__ void
154 store_block(unsigned block, uchar *src, unsigned len)
155 {
156 ulong offset = block * TftpBlkSize + TftpBlockWrapOffset;
157 ulong newsize = offset + len;
158 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
159 int i, rc = 0;
160
161 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
162 /* start address in flash? */
163 if (flash_info[i].flash_id == FLASH_UNKNOWN)
164 continue;
165 if (load_addr + offset >= flash_info[i].start[0]) {
166 rc = 1;
167 break;
168 }
169 }
170
171 if (rc) { /* Flash is destination for this packet */
172 rc = flash_write((char *)src, (ulong)(load_addr+offset), len);
173 if (rc) {
174 flash_perror(rc);
175 NetState = NETLOOP_FAIL;
176 return;
177 }
178 }
179 else
180 #endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */
181 {
182 (void)memcpy((void *)(load_addr + offset), src, len);
183 }
184 #ifdef CONFIG_MCAST_TFTP
185 if (Multicast)
186 ext2_set_bit(block, Bitmap);
187 #endif
188
189 if (NetBootFileXferSize < newsize)
190 NetBootFileXferSize = newsize;
191 }
192
193 /* Clear our state ready for a new transfer */
194 void new_transfer(void)
195 {
196 TftpLastBlock = 0;
197 TftpBlockWrap = 0;
198 TftpBlockWrapOffset = 0;
199 #ifdef CONFIG_CMD_TFTPPUT
200 TftpFinalBlock = 0;
201 #endif
202 }
203
204 static void TftpSend(void);
205 static void TftpTimeout(void);
206
207 /**********************************************************************/
208
209 static void show_block_marker(void)
210 {
211 #ifdef CONFIG_TFTP_TSIZE
212 if (TftpTsize) {
213 ulong pos = TftpBlock * TftpBlkSize + TftpBlockWrapOffset;
214
215 while (TftpNumchars < pos * 50 / TftpTsize) {
216 putc('#');
217 TftpNumchars++;
218 }
219 }
220 #endif
221 else {
222 if (((TftpBlock - 1) % 10) == 0)
223 putc('#');
224 else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0)
225 puts("\n\t ");
226 }
227 }
228
229 /**
230 * restart the current transfer due to an error
231 *
232 * @param msg Message to print for user
233 */
234 static void restart(const char *msg)
235 {
236 printf("\n%s; starting again\n", msg);
237 #ifdef CONFIG_MCAST_TFTP
238 mcast_cleanup();
239 #endif
240 NetStartAgain();
241 }
242
243 /*
244 * Check if the block number has wrapped, and update progress
245 *
246 * TODO: The egregious use of global variables in this file should be tidied.
247 */
248 static void update_block_number(void)
249 {
250 /*
251 * RFC1350 specifies that the first data packet will
252 * have sequence number 1. If we receive a sequence
253 * number of 0 this means that there was a wrap
254 * around of the (16 bit) counter.
255 */
256 if (TftpBlock == 0) {
257 TftpBlockWrap++;
258 TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE;
259 TftpTimeoutCount = 0; /* we've done well, reset thhe timeout */
260 } else {
261 show_block_marker();
262 }
263 }
264
265 /* The TFTP get or put is complete */
266 static void tftp_complete(void)
267 {
268 #ifdef CONFIG_TFTP_TSIZE
269 /* Print hash marks for the last packet received */
270 while (TftpTsize && TftpNumchars < 49) {
271 putc('#');
272 TftpNumchars++;
273 }
274 #endif
275 puts("\ndone\n");
276 NetState = NETLOOP_SUCCESS;
277 }
278
279 static void
280 TftpSend(void)
281 {
282 volatile uchar *pkt;
283 volatile uchar *xp;
284 int len = 0;
285 volatile ushort *s;
286
287 #ifdef CONFIG_MCAST_TFTP
288 /* Multicast TFTP.. non-MasterClients do not ACK data. */
289 if (Multicast
290 && (TftpState == STATE_DATA)
291 && (MasterClient == 0))
292 return;
293 #endif
294 /*
295 * We will always be sending some sort of packet, so
296 * cobble together the packet headers now.
297 */
298 pkt = NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE;
299
300 switch (TftpState) {
301
302 case STATE_SEND_RRQ:
303 xp = pkt;
304 s = (ushort *)pkt;
305 *s++ = htons(TFTP_RRQ);
306 pkt = (uchar *)s;
307 strcpy((char *)pkt, tftp_filename);
308 pkt += strlen(tftp_filename) + 1;
309 strcpy((char *)pkt, "octet");
310 pkt += 5 /*strlen("octet")*/ + 1;
311 strcpy((char *)pkt, "timeout");
312 pkt += 7 /*strlen("timeout")*/ + 1;
313 sprintf((char *)pkt, "%lu", TftpTimeoutMSecs / 1000);
314 debug("send option \"timeout %s\"\n", (char *)pkt);
315 pkt += strlen((char *)pkt) + 1;
316 #ifdef CONFIG_TFTP_TSIZE
317 memcpy((char *)pkt, "tsize\0000\0", 8);
318 pkt += 8;
319 #endif
320 /* try for more effic. blk size */
321 pkt += sprintf((char *)pkt, "blksize%c%d%c",
322 0, TftpBlkSizeOption, 0);
323 #ifdef CONFIG_MCAST_TFTP
324 /* Check all preconditions before even trying the option */
325 if (!ProhibitMcast
326 && (Bitmap = malloc(Mapsize))
327 && eth_get_dev()->mcast) {
328 free(Bitmap);
329 Bitmap = NULL;
330 pkt += sprintf((char *)pkt, "multicast%c%c", 0, 0);
331 }
332 #endif /* CONFIG_MCAST_TFTP */
333 len = pkt - xp;
334 break;
335
336 case STATE_OACK:
337 #ifdef CONFIG_MCAST_TFTP
338 /* My turn! Start at where I need blocks I missed.*/
339 if (Multicast)
340 TftpBlock = ext2_find_next_zero_bit(Bitmap,
341 (Mapsize*8), 0);
342 /*..falling..*/
343 #endif
344
345 case STATE_RECV_WRQ:
346 case STATE_DATA:
347 xp = pkt;
348 s = (ushort *)pkt;
349 *s++ = htons(TFTP_ACK);
350 *s++ = htons(TftpBlock);
351 pkt = (uchar *)s;
352 len = pkt - xp;
353 break;
354
355 case STATE_TOO_LARGE:
356 xp = pkt;
357 s = (ushort *)pkt;
358 *s++ = htons(TFTP_ERROR);
359 *s++ = htons(3);
360 pkt = (uchar *)s;
361 strcpy((char *)pkt, "File too large");
362 pkt += 14 /*strlen("File too large")*/ + 1;
363 len = pkt - xp;
364 break;
365
366 case STATE_BAD_MAGIC:
367 xp = pkt;
368 s = (ushort *)pkt;
369 *s++ = htons(TFTP_ERROR);
370 *s++ = htons(2);
371 pkt = (uchar *)s;
372 strcpy((char *)pkt, "File has bad magic");
373 pkt += 18 /*strlen("File has bad magic")*/ + 1;
374 len = pkt - xp;
375 break;
376 }
377
378 NetSendUDPPacket(NetServerEther, TftpRemoteIP, TftpRemotePort,
379 TftpOurPort, len);
380 }
381
382
383 static void
384 TftpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
385 unsigned len)
386 {
387 ushort proto;
388 ushort *s;
389 int i;
390
391 if (dest != TftpOurPort) {
392 #ifdef CONFIG_MCAST_TFTP
393 if (Multicast
394 && (!Mcast_port || (dest != Mcast_port)))
395 #endif
396 return;
397 }
398 if (TftpState != STATE_SEND_RRQ && src != TftpRemotePort &&
399 TftpState != STATE_RECV_WRQ)
400 return;
401
402 if (len < 2)
403 return;
404 len -= 2;
405 /* warning: don't use increment (++) in ntohs() macros!! */
406 s = (ushort *)pkt;
407 proto = *s++;
408 pkt = (uchar *)s;
409 switch (ntohs(proto)) {
410
411 case TFTP_RRQ:
412 case TFTP_ACK:
413 break;
414 default:
415 break;
416
417 #ifdef CONFIG_CMD_TFTPSRV
418 case TFTP_WRQ:
419 debug("Got WRQ\n");
420 TftpRemoteIP = sip;
421 TftpRemotePort = src;
422 TftpOurPort = 1024 + (get_timer(0) % 3072);
423 new_transfer();
424 TftpSend(); /* Send ACK(0) */
425 break;
426 #endif
427
428 case TFTP_OACK:
429 debug("Got OACK: %s %s\n",
430 pkt,
431 pkt + strlen((char *)pkt) + 1);
432 TftpState = STATE_OACK;
433 TftpRemotePort = src;
434 /*
435 * Check for 'blksize' option.
436 * Careful: "i" is signed, "len" is unsigned, thus
437 * something like "len-8" may give a *huge* number
438 */
439 for (i = 0; i+8 < len; i++) {
440 if (strcmp((char *)pkt+i, "blksize") == 0) {
441 TftpBlkSize = (unsigned short)
442 simple_strtoul((char *)pkt+i+8, NULL,
443 10);
444 debug("Blocksize ack: %s, %d\n",
445 (char *)pkt+i+8, TftpBlkSize);
446 }
447 #ifdef CONFIG_TFTP_TSIZE
448 if (strcmp((char *)pkt+i, "tsize") == 0) {
449 TftpTsize = simple_strtoul((char *)pkt+i+6,
450 NULL, 10);
451 debug("size = %s, %d\n",
452 (char *)pkt+i+6, TftpTsize);
453 }
454 #endif
455 }
456 #ifdef CONFIG_MCAST_TFTP
457 parse_multicast_oack((char *)pkt, len-1);
458 if ((Multicast) && (!MasterClient))
459 TftpState = STATE_DATA; /* passive.. */
460 else
461 #endif
462 TftpSend(); /* Send ACK */
463 break;
464 case TFTP_DATA:
465 if (len < 2)
466 return;
467 len -= 2;
468 TftpBlock = ntohs(*(ushort *)pkt);
469
470 update_block_number();
471
472 if (TftpState == STATE_SEND_RRQ)
473 debug("Server did not acknowledge timeout option!\n");
474
475 if (TftpState == STATE_SEND_RRQ || TftpState == STATE_OACK ||
476 TftpState == STATE_RECV_WRQ) {
477 /* first block received */
478 TftpState = STATE_DATA;
479 TftpRemotePort = src;
480 new_transfer();
481
482 #ifdef CONFIG_MCAST_TFTP
483 if (Multicast) { /* start!=1 common if mcast */
484 TftpLastBlock = TftpBlock - 1;
485 } else
486 #endif
487 if (TftpBlock != 1) { /* Assertion */
488 printf("\nTFTP error: "
489 "First block is not block 1 (%ld)\n"
490 "Starting again\n\n",
491 TftpBlock);
492 NetStartAgain();
493 break;
494 }
495 }
496
497 if (TftpBlock == TftpLastBlock) {
498 /*
499 * Same block again; ignore it.
500 */
501 break;
502 }
503
504 TftpLastBlock = TftpBlock;
505 TftpTimeoutCountMax = TIMEOUT_COUNT;
506 NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
507
508 store_block(TftpBlock - 1, pkt + 2, len);
509
510 /*
511 * Acknowledge the block just received, which will prompt
512 * the remote for the next one.
513 */
514 #ifdef CONFIG_MCAST_TFTP
515 /* if I am the MasterClient, actively calculate what my next
516 * needed block is; else I'm passive; not ACKING
517 */
518 if (Multicast) {
519 if (len < TftpBlkSize) {
520 TftpEndingBlock = TftpBlock;
521 } else if (MasterClient) {
522 TftpBlock = PrevBitmapHole =
523 ext2_find_next_zero_bit(
524 Bitmap,
525 (Mapsize*8),
526 PrevBitmapHole);
527 if (TftpBlock > ((Mapsize*8) - 1)) {
528 printf("tftpfile too big\n");
529 /* try to double it and retry */
530 Mapsize <<= 1;
531 mcast_cleanup();
532 NetStartAgain();
533 return;
534 }
535 TftpLastBlock = TftpBlock;
536 }
537 }
538 #endif
539 TftpSend();
540
541 #ifdef CONFIG_MCAST_TFTP
542 if (Multicast) {
543 if (MasterClient && (TftpBlock >= TftpEndingBlock)) {
544 puts("\nMulticast tftp done\n");
545 mcast_cleanup();
546 NetState = NETLOOP_SUCCESS;
547 }
548 }
549 else
550 #endif
551 if (len < TftpBlkSize)
552 tftp_complete();
553 break;
554
555 case TFTP_ERROR:
556 printf("\nTFTP error: '%s' (%d)\n",
557 pkt + 2, ntohs(*(ushort *)pkt));
558
559 switch (ntohs(*(ushort *)pkt)) {
560 case TFTP_ERR_FILE_NOT_FOUND:
561 case TFTP_ERR_ACCESS_DENIED:
562 puts("Not retrying...\n");
563 eth_halt();
564 NetState = NETLOOP_FAIL;
565 break;
566 case TFTP_ERR_UNDEFINED:
567 case TFTP_ERR_DISK_FULL:
568 case TFTP_ERR_UNEXPECTED_OPCODE:
569 case TFTP_ERR_UNKNOWN_TRANSFER_ID:
570 case TFTP_ERR_FILE_ALREADY_EXISTS:
571 default:
572 puts("Starting again\n\n");
573 #ifdef CONFIG_MCAST_TFTP
574 mcast_cleanup();
575 #endif
576 NetStartAgain();
577 break;
578 }
579 break;
580 }
581 }
582
583
584 static void
585 TftpTimeout(void)
586 {
587 if (++TftpTimeoutCount > TftpTimeoutCountMax) {
588 restart("Retry count exceeded");
589 } else {
590 puts("T ");
591 NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
592 if (TftpState != STATE_RECV_WRQ)
593 TftpSend();
594 }
595 }
596
597
598 void
599 TftpStart(void)
600 {
601 char *ep; /* Environment pointer */
602
603 /*
604 * Allow the user to choose TFTP blocksize and timeout.
605 * TFTP protocol has a minimal timeout of 1 second.
606 */
607 ep = getenv("tftpblocksize");
608 if (ep != NULL)
609 TftpBlkSizeOption = simple_strtol(ep, NULL, 10);
610
611 ep = getenv("tftptimeout");
612 if (ep != NULL)
613 TftpTimeoutMSecs = simple_strtol(ep, NULL, 10);
614
615 if (TftpTimeoutMSecs < 1000) {
616 printf("TFTP timeout (%ld ms) too low, "
617 "set minimum = 1000 ms\n",
618 TftpTimeoutMSecs);
619 TftpTimeoutMSecs = 1000;
620 }
621
622 debug("TFTP blocksize = %i, timeout = %ld ms\n",
623 TftpBlkSizeOption, TftpTimeoutMSecs);
624
625 TftpRemoteIP = NetServerIP;
626 if (BootFile[0] == '\0') {
627 sprintf(default_filename, "%02lX%02lX%02lX%02lX.img",
628 NetOurIP & 0xFF,
629 (NetOurIP >> 8) & 0xFF,
630 (NetOurIP >> 16) & 0xFF,
631 (NetOurIP >> 24) & 0xFF);
632
633 strncpy(tftp_filename, default_filename, MAX_LEN);
634 tftp_filename[MAX_LEN-1] = 0;
635
636 printf("*** Warning: no boot file name; using '%s'\n",
637 tftp_filename);
638 } else {
639 char *p = strchr(BootFile, ':');
640
641 if (p == NULL) {
642 strncpy(tftp_filename, BootFile, MAX_LEN);
643 tftp_filename[MAX_LEN-1] = 0;
644 } else {
645 TftpRemoteIP = string_to_ip(BootFile);
646 strncpy(tftp_filename, p + 1, MAX_LEN);
647 tftp_filename[MAX_LEN-1] = 0;
648 }
649 }
650
651 printf("Using %s device\n", eth_get_name());
652 printf("TFTP from server %pI4"
653 "; our IP address is %pI4", &TftpRemoteIP, &NetOurIP);
654
655 /* Check if we need to send across this subnet */
656 if (NetOurGatewayIP && NetOurSubnetMask) {
657 IPaddr_t OurNet = NetOurIP & NetOurSubnetMask;
658 IPaddr_t RemoteNet = TftpRemoteIP & NetOurSubnetMask;
659
660 if (OurNet != RemoteNet)
661 printf("; sending through gateway %pI4",
662 &NetOurGatewayIP);
663 }
664 putc('\n');
665
666 printf("Filename '%s'.", tftp_filename);
667
668 if (NetBootFileSize) {
669 printf(" Size is 0x%x Bytes = ", NetBootFileSize<<9);
670 print_size(NetBootFileSize<<9, "");
671 }
672
673 putc('\n');
674
675 printf("Load address: 0x%lx\n", load_addr);
676
677 puts("Loading: *\b");
678
679 TftpTimeoutCountMax = TftpRRQTimeoutCountMax;
680
681 NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
682 NetSetHandler(TftpHandler);
683
684 TftpRemotePort = WELL_KNOWN_PORT;
685 TftpTimeoutCount = 0;
686 TftpState = STATE_SEND_RRQ;
687 /* Use a pseudo-random port unless a specific port is set */
688 TftpOurPort = 1024 + (get_timer(0) % 3072);
689
690 #ifdef CONFIG_TFTP_PORT
691 ep = getenv("tftpdstp");
692 if (ep != NULL)
693 TftpRemotePort = simple_strtol(ep, NULL, 10);
694 ep = getenv("tftpsrcp");
695 if (ep != NULL)
696 TftpOurPort = simple_strtol(ep, NULL, 10);
697 #endif
698 TftpBlock = 0;
699
700 /* zero out server ether in case the server ip has changed */
701 memset(NetServerEther, 0, 6);
702 /* Revert TftpBlkSize to dflt */
703 TftpBlkSize = TFTP_BLOCK_SIZE;
704 #ifdef CONFIG_MCAST_TFTP
705 mcast_cleanup();
706 #endif
707 #ifdef CONFIG_TFTP_TSIZE
708 TftpTsize = 0;
709 TftpNumchars = 0;
710 #endif
711
712 TftpSend();
713 }
714
715 #ifdef CONFIG_CMD_TFTPSRV
716 void
717 TftpStartServer(void)
718 {
719 tftp_filename[0] = 0;
720
721 printf("Using %s device\n", eth_get_name());
722 printf("Listening for TFTP transfer on %pI4\n", &NetOurIP);
723 printf("Load address: 0x%lx\n", load_addr);
724
725 puts("Loading: *\b");
726
727 TftpTimeoutCountMax = TIMEOUT_COUNT;
728 TftpTimeoutCount = 0;
729 TftpTimeoutMSecs = TIMEOUT;
730 NetSetTimeout(TftpTimeoutMSecs, TftpTimeout);
731
732 /* Revert TftpBlkSize to dflt */
733 TftpBlkSize = TFTP_BLOCK_SIZE;
734 TftpBlock = 0;
735 TftpOurPort = WELL_KNOWN_PORT;
736
737 #ifdef CONFIG_TFTP_TSIZE
738 TftpTsize = 0;
739 TftpNumchars = 0;
740 #endif
741
742 TftpState = STATE_RECV_WRQ;
743 NetSetHandler(TftpHandler);
744 }
745 #endif /* CONFIG_CMD_TFTPSRV */
746
747 #ifdef CONFIG_MCAST_TFTP
748 /* Credits: atftp project.
749 */
750
751 /* pick up BcastAddr, Port, and whether I am [now] the master-client. *
752 * Frame:
753 * +-------+-----------+---+-------~~-------+---+
754 * | opc | multicast | 0 | addr, port, mc | 0 |
755 * +-------+-----------+---+-------~~-------+---+
756 * The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
757 * I am the new master-client so must send ACKs to DataBlocks. If I am not
758 * master-client, I'm a passive client, gathering what DataBlocks I may and
759 * making note of which ones I got in my bitmask.
760 * In theory, I never go from master->passive..
761 * .. this comes in with pkt already pointing just past opc
762 */
763 static void parse_multicast_oack(char *pkt, int len)
764 {
765 int i;
766 IPaddr_t addr;
767 char *mc_adr, *port, *mc;
768
769 mc_adr = port = mc = NULL;
770 /* march along looking for 'multicast\0', which has to start at least
771 * 14 bytes back from the end.
772 */
773 for (i = 0; i < len-14; i++)
774 if (strcmp(pkt+i, "multicast") == 0)
775 break;
776 if (i >= (len-14)) /* non-Multicast OACK, ign. */
777 return;
778
779 i += 10; /* strlen multicast */
780 mc_adr = pkt+i;
781 for (; i < len; i++) {
782 if (*(pkt+i) == ',') {
783 *(pkt+i) = '\0';
784 if (port) {
785 mc = pkt+i+1;
786 break;
787 } else {
788 port = pkt+i+1;
789 }
790 }
791 }
792 if (!port || !mc_adr || !mc)
793 return;
794 if (Multicast && MasterClient) {
795 printf("I got a OACK as master Client, WRONG!\n");
796 return;
797 }
798 /* ..I now accept packets destined for this MCAST addr, port */
799 if (!Multicast) {
800 if (Bitmap) {
801 printf("Internal failure! no mcast.\n");
802 free(Bitmap);
803 Bitmap = NULL;
804 ProhibitMcast = 1;
805 return ;
806 }
807 /* I malloc instead of pre-declare; so that if the file ends
808 * up being too big for this bitmap I can retry
809 */
810 Bitmap = malloc(Mapsize);
811 if (!Bitmap) {
812 printf("No Bitmap, no multicast. Sorry.\n");
813 ProhibitMcast = 1;
814 return;
815 }
816 memset(Bitmap, 0, Mapsize);
817 PrevBitmapHole = 0;
818 Multicast = 1;
819 }
820 addr = string_to_ip(mc_adr);
821 if (Mcast_addr != addr) {
822 if (Mcast_addr)
823 eth_mcast_join(Mcast_addr, 0);
824 Mcast_addr = addr;
825 if (eth_mcast_join(Mcast_addr, 1)) {
826 printf("Fail to set mcast, revert to TFTP\n");
827 ProhibitMcast = 1;
828 mcast_cleanup();
829 NetStartAgain();
830 }
831 }
832 MasterClient = (unsigned char)simple_strtoul((char *)mc, NULL, 10);
833 Mcast_port = (unsigned short)simple_strtoul(port, NULL, 10);
834 printf("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient);
835 return;
836 }
837
838 #endif /* Multicast TFTP */