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 #include <common.h>
9 #include <command.h>
10 #include <efi_loader.h>
11 #include <env.h>
12 #include <image.h>
13 #include <lmb.h>
14 #include <log.h>
15 #include <mapmem.h>
16 #include <net.h>
17 #include <asm/global_data.h>
18 #include <net/tftp.h>
19 #include "bootp.h"
20 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
21 #include <flash.h>
22 #endif
23
24 DECLARE_GLOBAL_DATA_PTR;
25
26 /* Well known TFTP port # */
27 #define WELL_KNOWN_PORT 69
28 /* Millisecs to timeout for lost pkt */
29 #define TIMEOUT 5000UL
30 #ifndef CONFIG_NET_RETRY_COUNT
31 /* # of timeouts before giving up */
32 # define TIMEOUT_COUNT 10
33 #else
34 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2)
35 #endif
36 /* Number of "loading" hashes per line (for checking the image size) */
37 #define HASHES_PER_LINE 65
38
39 /*
40 * TFTP operations.
41 */
42 #define TFTP_RRQ 1
43 #define TFTP_WRQ 2
44 #define TFTP_DATA 3
45 #define TFTP_ACK 4
46 #define TFTP_ERROR 5
47 #define TFTP_OACK 6
48
49 static ulong timeout_ms = TIMEOUT;
50 static int timeout_count_max = TIMEOUT_COUNT;
51 static ulong time_start; /* Record time we started tftp */
52
53 /*
54 * These globals govern the timeout behavior when attempting a connection to a
55 * TFTP server. tftp_timeout_ms specifies the number of milliseconds to
56 * wait for the server to respond to initial connection. Second global,
57 * tftp_timeout_count_max, gives the number of such connection retries.
58 * tftp_timeout_count_max must be non-negative and tftp_timeout_ms must be
59 * positive. The globals are meant to be set (and restored) by code needing
60 * non-standard timeout behavior when initiating a TFTP transfer.
61 */
62 ulong tftp_timeout_ms = TIMEOUT;
63 int tftp_timeout_count_max = TIMEOUT_COUNT;
64
65 enum {
66 TFTP_ERR_UNDEFINED = 0,
67 TFTP_ERR_FILE_NOT_FOUND = 1,
68 TFTP_ERR_ACCESS_DENIED = 2,
69 TFTP_ERR_DISK_FULL = 3,
70 TFTP_ERR_UNEXPECTED_OPCODE = 4,
71 TFTP_ERR_UNKNOWN_TRANSFER_ID = 5,
72 TFTP_ERR_FILE_ALREADY_EXISTS = 6,
73 TFTP_ERR_OPTION_NEGOTIATION = 8,
74 };
75
76 static struct in_addr tftp_remote_ip;
77 /* The UDP port at their end */
78 static int tftp_remote_port;
79 /* The UDP port at our end */
80 static int tftp_our_port;
81 static int timeout_count;
82 /* packet sequence number */
83 static ulong tftp_cur_block;
84 /* last packet sequence number received */
85 static ulong tftp_prev_block;
86 /* count of sequence number wraparounds */
87 static ulong tftp_block_wrap;
88 /* memory offset due to wrapping */
89 static ulong tftp_block_wrap_offset;
90 static int tftp_state;
91 static ulong tftp_load_addr;
92 #ifdef CONFIG_LMB
93 static ulong tftp_load_size;
94 #endif
95 #ifdef CONFIG_TFTP_TSIZE
96 /* The file size reported by the server */
97 static int tftp_tsize;
98 /* The number of hashes we printed */
99 static short tftp_tsize_num_hash;
100 #endif
101 /* The window size negotiated */
102 static ushort tftp_windowsize;
103 /* Next block to send ack to */
104 static ushort tftp_next_ack;
105 /* Last nack block we send */
106 static ushort tftp_last_nack;
107 #ifdef CONFIG_CMD_TFTPPUT
108 /* 1 if writing, else 0 */
109 static int tftp_put_active;
110 /* 1 if we have sent the last block */
111 static int tftp_put_final_block_sent;
112 #else
113 #define tftp_put_active 0
114 #endif
115
116 #define STATE_SEND_RRQ 1
117 #define STATE_DATA 2
118 #define STATE_TOO_LARGE 3
119 #define STATE_BAD_MAGIC 4
120 #define STATE_OACK 5
121 #define STATE_RECV_WRQ 6
122 #define STATE_SEND_WRQ 7
123 #define STATE_INVALID_OPTION 8
124
125 /* default TFTP block size */
126 #define TFTP_BLOCK_SIZE 512
127 /* sequence number is 16 bit */
128 #define TFTP_SEQUENCE_SIZE ((ulong)(1<<16))
129
130 #define DEFAULT_NAME_LEN (8 + 4 + 1)
131 static char default_filename[DEFAULT_NAME_LEN];
132
133 #ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
134 #define MAX_LEN 128
135 #else
136 #define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
137 #endif
138
139 static char tftp_filename[MAX_LEN];
140
141 /* 512 is poor choice for ethernet, MTU is typically 1500.
142 * Minus eth.hdrs thats 1468. Can get 2x better throughput with
143 * almost-MTU block sizes. At least try... fall back to 512 if need be.
144 * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file)
145 */
146
147 /* When windowsize is defined to 1,
148 * tftp behaves the same way as it was
149 * never declared
150 */
151 #ifdef CONFIG_TFTP_WINDOWSIZE
152 #define TFTP_WINDOWSIZE CONFIG_TFTP_WINDOWSIZE
153 #else
154 #define TFTP_WINDOWSIZE 1
155 #endif
156
157 static unsigned short tftp_block_size = TFTP_BLOCK_SIZE;
158 static unsigned short tftp_block_size_option = CONFIG_TFTP_BLOCKSIZE;
159 static unsigned short tftp_window_size_option = TFTP_WINDOWSIZE;
160
store_block(int block,uchar * src,unsigned int len)161 static inline int store_block(int block, uchar *src, unsigned int len)
162 {
163 ulong offset = block * tftp_block_size + tftp_block_wrap_offset -
164 tftp_block_size;
165 ulong newsize = offset + len;
166 ulong store_addr = tftp_load_addr + offset;
167 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
168 int i, rc = 0;
169
170 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
171 /* start address in flash? */
172 if (flash_info[i].flash_id == FLASH_UNKNOWN)
173 continue;
174 if (store_addr >= flash_info[i].start[0]) {
175 rc = 1;
176 break;
177 }
178 }
179
180 if (rc) { /* Flash is destination for this packet */
181 rc = flash_write((char *)src, store_addr, len);
182 if (rc) {
183 flash_perror(rc);
184 return rc;
185 }
186 } else
187 #endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */
188 {
189 void *ptr;
190
191 #ifdef CONFIG_LMB
192 ulong end_addr = tftp_load_addr + tftp_load_size;
193
194 if (!end_addr)
195 end_addr = ULONG_MAX;
196
197 if (store_addr < tftp_load_addr ||
198 store_addr + len > end_addr) {
199 puts("\nTFTP error: ");
200 puts("trying to overwrite reserved memory...\n");
201 return -1;
202 }
203 #endif
204 ptr = map_sysmem(store_addr, len);
205 memcpy(ptr, src, len);
206 unmap_sysmem(ptr);
207 }
208
209 if (net_boot_file_size < newsize)
210 net_boot_file_size = newsize;
211
212 return 0;
213 }
214
215 /* Clear our state ready for a new transfer */
new_transfer(void)216 static void new_transfer(void)
217 {
218 tftp_prev_block = 0;
219 tftp_block_wrap = 0;
220 tftp_block_wrap_offset = 0;
221 #ifdef CONFIG_CMD_TFTPPUT
222 tftp_put_final_block_sent = 0;
223 #endif
224 }
225
226 #ifdef CONFIG_CMD_TFTPPUT
227 /**
228 * Load the next block from memory to be sent over tftp.
229 *
230 * @param block Block number to send
231 * @param dst Destination buffer for data
232 * @param len Number of bytes in block (this one and every other)
233 * @return number of bytes loaded
234 */
load_block(unsigned block,uchar * dst,unsigned len)235 static int load_block(unsigned block, uchar *dst, unsigned len)
236 {
237 /* We may want to get the final block from the previous set */
238 ulong offset = block * tftp_block_size + tftp_block_wrap_offset -
239 tftp_block_size;
240 ulong tosend = len;
241
242 tosend = min(net_boot_file_size - offset, tosend);
243 (void)memcpy(dst, (void *)(image_save_addr + offset), tosend);
244 debug("%s: block=%u, offset=%lu, len=%u, tosend=%lu\n", __func__,
245 block, offset, len, tosend);
246 return tosend;
247 }
248 #endif
249
250 static void tftp_send(void);
251 static void tftp_timeout_handler(void);
252
253 /**********************************************************************/
254
show_block_marker(void)255 static void show_block_marker(void)
256 {
257 ulong pos;
258
259 #ifdef CONFIG_TFTP_TSIZE
260 if (tftp_tsize) {
261 pos = tftp_cur_block * tftp_block_size +
262 tftp_block_wrap_offset;
263 if (pos > tftp_tsize)
264 pos = tftp_tsize;
265
266 while (tftp_tsize_num_hash < pos * 50 / tftp_tsize) {
267 putc('#');
268 tftp_tsize_num_hash++;
269 }
270 } else
271 #endif
272 {
273 pos = (tftp_cur_block - 1) +
274 (tftp_block_wrap * TFTP_SEQUENCE_SIZE);
275 if ((pos % 10) == 0)
276 putc('#');
277 else if (((pos + 1) % (10 * HASHES_PER_LINE)) == 0)
278 puts("\n\t ");
279 }
280 }
281
282 /**
283 * restart the current transfer due to an error
284 *
285 * @param msg Message to print for user
286 */
restart(const char * msg)287 static void restart(const char *msg)
288 {
289 printf("\n%s; starting again\n", msg);
290 net_start_again();
291 }
292
293 /*
294 * Check if the block number has wrapped, and update progress
295 *
296 * TODO: The egregious use of global variables in this file should be tidied.
297 */
update_block_number(void)298 static void update_block_number(void)
299 {
300 /*
301 * RFC1350 specifies that the first data packet will
302 * have sequence number 1. If we receive a sequence
303 * number of 0 this means that there was a wrap
304 * around of the (16 bit) counter.
305 */
306 if (tftp_cur_block == 0 && tftp_prev_block != 0) {
307 tftp_block_wrap++;
308 tftp_block_wrap_offset += tftp_block_size * TFTP_SEQUENCE_SIZE;
309 timeout_count = 0; /* we've done well, reset the timeout */
310 }
311 show_block_marker();
312 }
313
314 /* The TFTP get or put is complete */
tftp_complete(void)315 static void tftp_complete(void)
316 {
317 #ifdef CONFIG_TFTP_TSIZE
318 /* Print hash marks for the last packet received */
319 while (tftp_tsize && tftp_tsize_num_hash < 49) {
320 putc('#');
321 tftp_tsize_num_hash++;
322 }
323 puts(" ");
324 print_size(tftp_tsize, "");
325 #endif
326 time_start = get_timer(time_start);
327 if (time_start > 0) {
328 puts("\n\t "); /* Line up with "Loading: " */
329 print_size(net_boot_file_size /
330 time_start * 1000, "/s");
331 }
332 puts("\ndone\n");
333 if (IS_ENABLED(CONFIG_CMD_BOOTEFI)) {
334 if (!tftp_put_active)
335 efi_set_bootdev("Net", "", tftp_filename,
336 map_sysmem(tftp_load_addr, 0),
337 net_boot_file_size);
338 }
339 net_set_state(NETLOOP_SUCCESS);
340 }
341
tftp_send(void)342 static void tftp_send(void)
343 {
344 uchar *pkt;
345 uchar *xp;
346 int len = 0;
347 ushort *s;
348 bool err_pkt = false;
349
350 /*
351 * We will always be sending some sort of packet, so
352 * cobble together the packet headers now.
353 */
354 pkt = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE;
355
356 switch (tftp_state) {
357 case STATE_SEND_RRQ:
358 case STATE_SEND_WRQ:
359 xp = pkt;
360 s = (ushort *)pkt;
361 #ifdef CONFIG_CMD_TFTPPUT
362 *s++ = htons(tftp_state == STATE_SEND_RRQ ? TFTP_RRQ :
363 TFTP_WRQ);
364 #else
365 *s++ = htons(TFTP_RRQ);
366 #endif
367 pkt = (uchar *)s;
368 strcpy((char *)pkt, tftp_filename);
369 pkt += strlen(tftp_filename) + 1;
370 strcpy((char *)pkt, "octet");
371 pkt += 5 /*strlen("octet")*/ + 1;
372 strcpy((char *)pkt, "timeout");
373 pkt += 7 /*strlen("timeout")*/ + 1;
374 sprintf((char *)pkt, "%lu", timeout_ms / 1000);
375 debug("send option \"timeout %s\"\n", (char *)pkt);
376 pkt += strlen((char *)pkt) + 1;
377 #ifdef CONFIG_TFTP_TSIZE
378 pkt += sprintf((char *)pkt, "tsize%c%u%c",
379 0, net_boot_file_size, 0);
380 #endif
381 /* try for more effic. blk size */
382 pkt += sprintf((char *)pkt, "blksize%c%d%c",
383 0, tftp_block_size_option, 0);
384
385 /* try for more effic. window size.
386 * Implemented only for tftp get.
387 * Don't bother sending if it's 1
388 */
389 if (tftp_state == STATE_SEND_RRQ && tftp_window_size_option > 1)
390 pkt += sprintf((char *)pkt, "windowsize%c%d%c",
391 0, tftp_window_size_option, 0);
392 len = pkt - xp;
393 break;
394
395 case STATE_OACK:
396
397 case STATE_RECV_WRQ:
398 case STATE_DATA:
399 xp = pkt;
400 s = (ushort *)pkt;
401 s[0] = htons(TFTP_ACK);
402 s[1] = htons(tftp_cur_block);
403 pkt = (uchar *)(s + 2);
404 #ifdef CONFIG_CMD_TFTPPUT
405 if (tftp_put_active) {
406 int toload = tftp_block_size;
407 int loaded = load_block(tftp_cur_block, pkt, toload);
408
409 s[0] = htons(TFTP_DATA);
410 pkt += loaded;
411 tftp_put_final_block_sent = (loaded < toload);
412 }
413 #endif
414 len = pkt - xp;
415 break;
416
417 case STATE_TOO_LARGE:
418 xp = pkt;
419 s = (ushort *)pkt;
420 *s++ = htons(TFTP_ERROR);
421 *s++ = htons(3);
422
423 pkt = (uchar *)s;
424 strcpy((char *)pkt, "File too large");
425 pkt += 14 /*strlen("File too large")*/ + 1;
426 len = pkt - xp;
427 err_pkt = true;
428 break;
429
430 case STATE_BAD_MAGIC:
431 xp = pkt;
432 s = (ushort *)pkt;
433 *s++ = htons(TFTP_ERROR);
434 *s++ = htons(2);
435 pkt = (uchar *)s;
436 strcpy((char *)pkt, "File has bad magic");
437 pkt += 18 /*strlen("File has bad magic")*/ + 1;
438 len = pkt - xp;
439 err_pkt = true;
440 break;
441
442 case STATE_INVALID_OPTION:
443 xp = pkt;
444 s = (ushort *)pkt;
445 *s++ = htons(TFTP_ERROR);
446 *s++ = htons(TFTP_ERR_OPTION_NEGOTIATION);
447 pkt = (uchar *)s;
448 strcpy((char *)pkt, "Option Negotiation Failed");
449 /* strlen("Option Negotiation Failed") + NULL*/
450 pkt += 25 + 1;
451 len = pkt - xp;
452 err_pkt = true;
453 break;
454 }
455
456 net_send_udp_packet(net_server_ethaddr, tftp_remote_ip,
457 tftp_remote_port, tftp_our_port, len);
458
459 if (err_pkt)
460 net_set_state(NETLOOP_FAIL);
461 }
462
463 #ifdef CONFIG_CMD_TFTPPUT
icmp_handler(unsigned type,unsigned code,unsigned dest,struct in_addr sip,unsigned src,uchar * pkt,unsigned len)464 static void icmp_handler(unsigned type, unsigned code, unsigned dest,
465 struct in_addr sip, unsigned src, uchar *pkt,
466 unsigned len)
467 {
468 if (type == ICMP_NOT_REACH && code == ICMP_NOT_REACH_PORT) {
469 /* Oh dear the other end has gone away */
470 restart("TFTP server died");
471 }
472 }
473 #endif
474
tftp_handler(uchar * pkt,unsigned dest,struct in_addr sip,unsigned src,unsigned len)475 static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
476 unsigned src, unsigned len)
477 {
478 __be16 proto;
479 __be16 *s;
480 int i;
481 u16 timeout_val_rcvd;
482
483 if (dest != tftp_our_port) {
484 return;
485 }
486 if (tftp_state != STATE_SEND_RRQ && src != tftp_remote_port &&
487 tftp_state != STATE_RECV_WRQ && tftp_state != STATE_SEND_WRQ)
488 return;
489
490 if (len < 2)
491 return;
492 len -= 2;
493 /* warning: don't use increment (++) in ntohs() macros!! */
494 s = (__be16 *)pkt;
495 proto = *s++;
496 pkt = (uchar *)s;
497 switch (ntohs(proto)) {
498 case TFTP_RRQ:
499 break;
500
501 case TFTP_ACK:
502 #ifdef CONFIG_CMD_TFTPPUT
503 if (tftp_put_active) {
504 if (tftp_put_final_block_sent) {
505 tftp_complete();
506 } else {
507 /*
508 * Move to the next block. We want our block
509 * count to wrap just like the other end!
510 */
511 int block = ntohs(*s);
512 int ack_ok = (tftp_cur_block == block);
513
514 tftp_prev_block = tftp_cur_block;
515 tftp_cur_block = (unsigned short)(block + 1);
516 update_block_number();
517 if (ack_ok)
518 tftp_send(); /* Send next data block */
519 }
520 }
521 #endif
522 break;
523
524 default:
525 break;
526
527 #ifdef CONFIG_CMD_TFTPSRV
528 case TFTP_WRQ:
529 debug("Got WRQ\n");
530 tftp_remote_ip = sip;
531 tftp_remote_port = src;
532 tftp_our_port = 1024 + (get_timer(0) % 3072);
533 new_transfer();
534 tftp_send(); /* Send ACK(0) */
535 break;
536 #endif
537
538 case TFTP_OACK:
539 debug("Got OACK: ");
540 for (i = 0; i < len; i++) {
541 if (pkt[i] == '\0')
542 debug(" ");
543 else
544 debug("%c", pkt[i]);
545 }
546 debug("\n");
547 tftp_state = STATE_OACK;
548 tftp_remote_port = src;
549 /*
550 * Check for 'blksize' option.
551 * Careful: "i" is signed, "len" is unsigned, thus
552 * something like "len-8" may give a *huge* number
553 */
554 for (i = 0; i+8 < len; i++) {
555 if (strcasecmp((char *)pkt + i, "blksize") == 0) {
556 tftp_block_size = (unsigned short)
557 simple_strtoul((char *)pkt + i + 8,
558 NULL, 10);
559 debug("Blocksize oack: %s, %d\n",
560 (char *)pkt + i + 8, tftp_block_size);
561 if (tftp_block_size > tftp_block_size_option) {
562 printf("Invalid blk size(=%d)\n",
563 tftp_block_size);
564 tftp_state = STATE_INVALID_OPTION;
565 }
566 }
567 if (strcasecmp((char *)pkt + i, "timeout") == 0) {
568 timeout_val_rcvd = (unsigned short)
569 simple_strtoul((char *)pkt + i + 8,
570 NULL, 10);
571 debug("Timeout oack: %s, %d\n",
572 (char *)pkt + i + 8, timeout_val_rcvd);
573 if (timeout_val_rcvd != (timeout_ms / 1000)) {
574 printf("Invalid timeout val(=%d s)\n",
575 timeout_val_rcvd);
576 tftp_state = STATE_INVALID_OPTION;
577 }
578 }
579 #ifdef CONFIG_TFTP_TSIZE
580 if (strcasecmp((char *)pkt + i, "tsize") == 0) {
581 tftp_tsize = simple_strtoul((char *)pkt + i + 6,
582 NULL, 10);
583 debug("size = %s, %d\n",
584 (char *)pkt + i + 6, tftp_tsize);
585 }
586 #endif
587 if (strcasecmp((char *)pkt + i, "windowsize") == 0) {
588 tftp_windowsize =
589 simple_strtoul((char *)pkt + i + 11,
590 NULL, 10);
591 debug("windowsize = %s, %d\n",
592 (char *)pkt + i + 11, tftp_windowsize);
593 }
594 }
595
596 tftp_next_ack = tftp_windowsize;
597
598 #ifdef CONFIG_CMD_TFTPPUT
599 if (tftp_put_active && tftp_state == STATE_OACK) {
600 /* Get ready to send the first block */
601 tftp_state = STATE_DATA;
602 tftp_cur_block++;
603 }
604 #endif
605 tftp_send(); /* Send ACK or first data block */
606 break;
607 case TFTP_DATA:
608 if (len < 2)
609 return;
610 len -= 2;
611
612 if (ntohs(*(__be16 *)pkt) != (ushort)(tftp_cur_block + 1)) {
613 debug("Received unexpected block: %d, expected: %d\n",
614 ntohs(*(__be16 *)pkt),
615 (ushort)(tftp_cur_block + 1));
616 /*
617 * If one packet is dropped most likely
618 * all other buffers in the window
619 * that will arrive will cause a sending NACK.
620 * This just overwellms the server, let's just send one.
621 */
622 if (tftp_last_nack != tftp_cur_block) {
623 tftp_send();
624 tftp_last_nack = tftp_cur_block;
625 tftp_next_ack = (ushort)(tftp_cur_block +
626 tftp_windowsize);
627 }
628 break;
629 }
630
631 tftp_cur_block++;
632 tftp_cur_block %= TFTP_SEQUENCE_SIZE;
633
634 if (tftp_state == STATE_SEND_RRQ) {
635 debug("Server did not acknowledge any options!\n");
636 tftp_next_ack = tftp_windowsize;
637 }
638
639 if (tftp_state == STATE_SEND_RRQ || tftp_state == STATE_OACK ||
640 tftp_state == STATE_RECV_WRQ) {
641 /* first block received */
642 tftp_state = STATE_DATA;
643 tftp_remote_port = src;
644 new_transfer();
645
646 if (tftp_cur_block != 1) { /* Assertion */
647 puts("\nTFTP error: ");
648 printf("First block is not block 1 (%ld)\n",
649 tftp_cur_block);
650 puts("Starting again\n\n");
651 net_start_again();
652 break;
653 }
654 }
655
656 if (tftp_cur_block == tftp_prev_block) {
657 /* Same block again; ignore it. */
658 break;
659 }
660
661 update_block_number();
662 tftp_prev_block = tftp_cur_block;
663 timeout_count_max = tftp_timeout_count_max;
664 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
665
666 if (store_block(tftp_cur_block, pkt + 2, len)) {
667 eth_halt();
668 net_set_state(NETLOOP_FAIL);
669 break;
670 }
671
672 if (len < tftp_block_size) {
673 tftp_send();
674 tftp_complete();
675 break;
676 }
677
678 /*
679 * Acknowledge the block just received, which will prompt
680 * the remote for the next one.
681 */
682 if (tftp_cur_block == tftp_next_ack) {
683 tftp_send();
684 tftp_next_ack += tftp_windowsize;
685 }
686 break;
687
688 case TFTP_ERROR:
689 printf("\nTFTP error: '%s' (%d)\n",
690 pkt + 2, ntohs(*(__be16 *)pkt));
691
692 switch (ntohs(*(__be16 *)pkt)) {
693 case TFTP_ERR_FILE_NOT_FOUND:
694 case TFTP_ERR_ACCESS_DENIED:
695 puts("Not retrying...\n");
696 eth_halt();
697 net_set_state(NETLOOP_FAIL);
698 break;
699 case TFTP_ERR_UNDEFINED:
700 case TFTP_ERR_DISK_FULL:
701 case TFTP_ERR_UNEXPECTED_OPCODE:
702 case TFTP_ERR_UNKNOWN_TRANSFER_ID:
703 case TFTP_ERR_FILE_ALREADY_EXISTS:
704 default:
705 puts("Starting again\n\n");
706 net_start_again();
707 break;
708 }
709 break;
710 }
711 }
712
713
tftp_timeout_handler(void)714 static void tftp_timeout_handler(void)
715 {
716 if (++timeout_count > timeout_count_max) {
717 restart("Retry count exceeded");
718 } else {
719 puts("T ");
720 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
721 if (tftp_state != STATE_RECV_WRQ)
722 tftp_send();
723 }
724 }
725
726 /* Initialize tftp_load_addr and tftp_load_size from image_load_addr and lmb */
tftp_init_load_addr(void)727 static int tftp_init_load_addr(void)
728 {
729 #ifdef CONFIG_LMB
730 struct lmb lmb;
731 phys_size_t max_size;
732
733 lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
734
735 max_size = lmb_get_free_size(&lmb, image_load_addr);
736 if (!max_size)
737 return -1;
738
739 tftp_load_size = max_size;
740 #endif
741 tftp_load_addr = image_load_addr;
742 return 0;
743 }
744
tftp_start(enum proto_t protocol)745 void tftp_start(enum proto_t protocol)
746 {
747 #if CONFIG_NET_TFTP_VARS
748 char *ep; /* Environment pointer */
749
750 /*
751 * Allow the user to choose TFTP blocksize and timeout.
752 * TFTP protocol has a minimal timeout of 1 second.
753 */
754
755 ep = env_get("tftpblocksize");
756 if (ep != NULL)
757 tftp_block_size_option = simple_strtol(ep, NULL, 10);
758
759 ep = env_get("tftpwindowsize");
760 if (ep != NULL)
761 tftp_window_size_option = simple_strtol(ep, NULL, 10);
762
763 ep = env_get("tftptimeout");
764 if (ep != NULL)
765 timeout_ms = simple_strtol(ep, NULL, 10);
766
767 if (timeout_ms < 1000) {
768 printf("TFTP timeout (%ld ms) too low, set min = 1000 ms\n",
769 timeout_ms);
770 timeout_ms = 1000;
771 }
772
773 ep = env_get("tftptimeoutcountmax");
774 if (ep != NULL)
775 tftp_timeout_count_max = simple_strtol(ep, NULL, 10);
776
777 if (tftp_timeout_count_max < 0) {
778 printf("TFTP timeout count max (%d ms) negative, set to 0\n",
779 tftp_timeout_count_max);
780 tftp_timeout_count_max = 0;
781 }
782 #endif
783
784 debug("TFTP blocksize = %i, TFTP windowsize = %d timeout = %ld ms\n",
785 tftp_block_size_option, tftp_window_size_option, timeout_ms);
786
787 tftp_remote_ip = net_server_ip;
788 if (!net_parse_bootfile(&tftp_remote_ip, tftp_filename, MAX_LEN)) {
789 sprintf(default_filename, "%02X%02X%02X%02X.img",
790 net_ip.s_addr & 0xFF,
791 (net_ip.s_addr >> 8) & 0xFF,
792 (net_ip.s_addr >> 16) & 0xFF,
793 (net_ip.s_addr >> 24) & 0xFF);
794
795 strncpy(tftp_filename, default_filename, DEFAULT_NAME_LEN);
796 tftp_filename[DEFAULT_NAME_LEN - 1] = 0;
797
798 printf("*** Warning: no boot file name; using '%s'\n",
799 tftp_filename);
800 }
801
802 printf("Using %s device\n", eth_get_name());
803 printf("TFTP %s server %pI4; our IP address is %pI4",
804 #ifdef CONFIG_CMD_TFTPPUT
805 protocol == TFTPPUT ? "to" : "from",
806 #else
807 "from",
808 #endif
809 &tftp_remote_ip, &net_ip);
810
811 /* Check if we need to send across this subnet */
812 if (net_gateway.s_addr && net_netmask.s_addr) {
813 struct in_addr our_net;
814 struct in_addr remote_net;
815
816 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
817 remote_net.s_addr = tftp_remote_ip.s_addr & net_netmask.s_addr;
818 if (our_net.s_addr != remote_net.s_addr)
819 printf("; sending through gateway %pI4", &net_gateway);
820 }
821 putc('\n');
822
823 printf("Filename '%s'.", tftp_filename);
824
825 if (net_boot_file_expected_size_in_blocks) {
826 printf(" Size is 0x%x Bytes = ",
827 net_boot_file_expected_size_in_blocks << 9);
828 print_size(net_boot_file_expected_size_in_blocks << 9, "");
829 }
830
831 putc('\n');
832 #ifdef CONFIG_CMD_TFTPPUT
833 tftp_put_active = (protocol == TFTPPUT);
834 if (tftp_put_active) {
835 printf("Save address: 0x%lx\n", image_save_addr);
836 printf("Save size: 0x%lx\n", image_save_size);
837 net_boot_file_size = image_save_size;
838 puts("Saving: *\b");
839 tftp_state = STATE_SEND_WRQ;
840 new_transfer();
841 } else
842 #endif
843 {
844 if (tftp_init_load_addr()) {
845 eth_halt();
846 net_set_state(NETLOOP_FAIL);
847 puts("\nTFTP error: ");
848 puts("trying to overwrite reserved memory...\n");
849 return;
850 }
851 printf("Load address: 0x%lx\n", tftp_load_addr);
852 puts("Loading: *\b");
853 tftp_state = STATE_SEND_RRQ;
854 }
855
856 time_start = get_timer(0);
857 timeout_count_max = tftp_timeout_count_max;
858
859 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
860 net_set_udp_handler(tftp_handler);
861 #ifdef CONFIG_CMD_TFTPPUT
862 net_set_icmp_handler(icmp_handler);
863 #endif
864 tftp_remote_port = WELL_KNOWN_PORT;
865 timeout_count = 0;
866 /* Use a pseudo-random port unless a specific port is set */
867 tftp_our_port = 1024 + (get_timer(0) % 3072);
868
869 #ifdef CONFIG_TFTP_PORT
870 ep = env_get("tftpdstp");
871 if (ep != NULL)
872 tftp_remote_port = simple_strtol(ep, NULL, 10);
873 ep = env_get("tftpsrcp");
874 if (ep != NULL)
875 tftp_our_port = simple_strtol(ep, NULL, 10);
876 #endif
877 tftp_cur_block = 0;
878 tftp_windowsize = 1;
879 tftp_last_nack = 0;
880 /* zero out server ether in case the server ip has changed */
881 memset(net_server_ethaddr, 0, 6);
882 /* Revert tftp_block_size to dflt */
883 tftp_block_size = TFTP_BLOCK_SIZE;
884 #ifdef CONFIG_TFTP_TSIZE
885 tftp_tsize = 0;
886 tftp_tsize_num_hash = 0;
887 #endif
888
889 tftp_send();
890 }
891
892 #ifdef CONFIG_CMD_TFTPSRV
tftp_start_server(void)893 void tftp_start_server(void)
894 {
895 tftp_filename[0] = 0;
896
897 if (tftp_init_load_addr()) {
898 eth_halt();
899 net_set_state(NETLOOP_FAIL);
900 puts("\nTFTP error: trying to overwrite reserved memory...\n");
901 return;
902 }
903 printf("Using %s device\n", eth_get_name());
904 printf("Listening for TFTP transfer on %pI4\n", &net_ip);
905 printf("Load address: 0x%lx\n", tftp_load_addr);
906
907 puts("Loading: *\b");
908
909 timeout_count_max = tftp_timeout_count_max;
910 timeout_count = 0;
911 timeout_ms = TIMEOUT;
912 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
913
914 /* Revert tftp_block_size to dflt */
915 tftp_block_size = TFTP_BLOCK_SIZE;
916 tftp_cur_block = 0;
917 tftp_our_port = WELL_KNOWN_PORT;
918
919 #ifdef CONFIG_TFTP_TSIZE
920 tftp_tsize = 0;
921 tftp_tsize_num_hash = 0;
922 #endif
923
924 tftp_state = STATE_RECV_WRQ;
925 net_set_udp_handler(tftp_handler);
926
927 /* zero out server ether in case the server ip has changed */
928 memset(net_server_ethaddr, 0, 6);
929 }
930 #endif /* CONFIG_CMD_TFTPSRV */
931
932