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 <efi_loader.h>
12 #include <mapmem.h>
13 #include <net.h>
14 #include <net/tftp.h>
15 #include "bootp.h"
16 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
17 #include <flash.h>
18 #endif
19
20 /* Well known TFTP port # */
21 #define WELL_KNOWN_PORT 69
22 /* Millisecs to timeout for lost pkt */
23 #define TIMEOUT 5000UL
24 #ifndef CONFIG_NET_RETRY_COUNT
25 /* # of timeouts before giving up */
26 # define TIMEOUT_COUNT 10
27 #else
28 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2)
29 #endif
30 /* Number of "loading" hashes per line (for checking the image size) */
31 #define HASHES_PER_LINE 65
32
33 /*
34 * TFTP operations.
35 */
36 #define TFTP_RRQ 1
37 #define TFTP_WRQ 2
38 #define TFTP_DATA 3
39 #define TFTP_ACK 4
40 #define TFTP_ERROR 5
41 #define TFTP_OACK 6
42
43 static ulong timeout_ms = TIMEOUT;
44 static int timeout_count_max = TIMEOUT_COUNT;
45 static ulong time_start; /* Record time we started tftp */
46
47 /*
48 * These globals govern the timeout behavior when attempting a connection to a
49 * TFTP server. tftp_timeout_ms specifies the number of milliseconds to
50 * wait for the server to respond to initial connection. Second global,
51 * tftp_timeout_count_max, gives the number of such connection retries.
52 * tftp_timeout_count_max must be non-negative and tftp_timeout_ms must be
53 * positive. The globals are meant to be set (and restored) by code needing
54 * non-standard timeout behavior when initiating a TFTP transfer.
55 */
56 ulong tftp_timeout_ms = TIMEOUT;
57 int tftp_timeout_count_max = TIMEOUT_COUNT;
58
59 enum {
60 TFTP_ERR_UNDEFINED = 0,
61 TFTP_ERR_FILE_NOT_FOUND = 1,
62 TFTP_ERR_ACCESS_DENIED = 2,
63 TFTP_ERR_DISK_FULL = 3,
64 TFTP_ERR_UNEXPECTED_OPCODE = 4,
65 TFTP_ERR_UNKNOWN_TRANSFER_ID = 5,
66 TFTP_ERR_FILE_ALREADY_EXISTS = 6,
67 };
68
69 static struct in_addr tftp_remote_ip;
70 /* The UDP port at their end */
71 static int tftp_remote_port;
72 /* The UDP port at our end */
73 static int tftp_our_port;
74 static int timeout_count;
75 /* packet sequence number */
76 static ulong tftp_cur_block;
77 /* last packet sequence number received */
78 static ulong tftp_prev_block;
79 /* count of sequence number wraparounds */
80 static ulong tftp_block_wrap;
81 /* memory offset due to wrapping */
82 static ulong tftp_block_wrap_offset;
83 static int tftp_state;
84 #ifdef CONFIG_TFTP_TSIZE
85 /* The file size reported by the server */
86 static int tftp_tsize;
87 /* The number of hashes we printed */
88 static short tftp_tsize_num_hash;
89 #endif
90 #ifdef CONFIG_CMD_TFTPPUT
91 /* 1 if writing, else 0 */
92 static int tftp_put_active;
93 /* 1 if we have sent the last block */
94 static int tftp_put_final_block_sent;
95 #else
96 #define tftp_put_active 0
97 #endif
98
99 #define STATE_SEND_RRQ 1
100 #define STATE_DATA 2
101 #define STATE_TOO_LARGE 3
102 #define STATE_BAD_MAGIC 4
103 #define STATE_OACK 5
104 #define STATE_RECV_WRQ 6
105 #define STATE_SEND_WRQ 7
106
107 /* default TFTP block size */
108 #define TFTP_BLOCK_SIZE 512
109 /* sequence number is 16 bit */
110 #define TFTP_SEQUENCE_SIZE ((ulong)(1<<16))
111
112 #define DEFAULT_NAME_LEN (8 + 4 + 1)
113 static char default_filename[DEFAULT_NAME_LEN];
114
115 #ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
116 #define MAX_LEN 128
117 #else
118 #define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
119 #endif
120
121 static char tftp_filename[MAX_LEN];
122
123 /* 512 is poor choice for ethernet, MTU is typically 1500.
124 * Minus eth.hdrs thats 1468. Can get 2x better throughput with
125 * almost-MTU block sizes. At least try... fall back to 512 if need be.
126 * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file)
127 */
128 #ifdef CONFIG_TFTP_BLOCKSIZE
129 #define TFTP_MTU_BLOCKSIZE CONFIG_TFTP_BLOCKSIZE
130 #else
131 #define TFTP_MTU_BLOCKSIZE 1468
132 #endif
133
134 static unsigned short tftp_block_size = TFTP_BLOCK_SIZE;
135 static unsigned short tftp_block_size_option = TFTP_MTU_BLOCKSIZE;
136
137 #ifdef CONFIG_MCAST_TFTP
138 #include <malloc.h>
139 #define MTFTP_BITMAPSIZE 0x1000
140 static unsigned *tftp_mcast_bitmap;
141 static int tftp_mcast_prev_hole;
142 static int tftp_mcast_bitmap_size = MTFTP_BITMAPSIZE;
143 static int tftp_mcast_disabled;
144 static int tftp_mcast_master_client;
145 static int tftp_mcast_active;
146 static int tftp_mcast_port;
147 /* can get 'last' block before done..*/
148 static ulong tftp_mcast_ending_block;
149
150 static void parse_multicast_oack(char *pkt, int len);
151
mcast_cleanup(void)152 static void mcast_cleanup(void)
153 {
154 if (net_mcast_addr)
155 eth_mcast_join(net_mcast_addr, 0);
156 if (tftp_mcast_bitmap)
157 free(tftp_mcast_bitmap);
158 tftp_mcast_bitmap = NULL;
159 net_mcast_addr.s_addr = 0;
160 tftp_mcast_active = 0;
161 tftp_mcast_port = 0;
162 tftp_mcast_ending_block = -1;
163 }
164
165 #endif /* CONFIG_MCAST_TFTP */
166
store_block(int block,uchar * src,unsigned len)167 static inline void store_block(int block, uchar *src, unsigned len)
168 {
169 ulong offset = block * tftp_block_size + tftp_block_wrap_offset;
170 ulong newsize = offset + len;
171 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
172 int i, rc = 0;
173
174 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
175 /* start address in flash? */
176 if (flash_info[i].flash_id == FLASH_UNKNOWN)
177 continue;
178 if (load_addr + offset >= flash_info[i].start[0]) {
179 rc = 1;
180 break;
181 }
182 }
183
184 if (rc) { /* Flash is destination for this packet */
185 rc = flash_write((char *)src, (ulong)(load_addr+offset), len);
186 if (rc) {
187 flash_perror(rc);
188 net_set_state(NETLOOP_FAIL);
189 return;
190 }
191 } else
192 #endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */
193 {
194 void *ptr = map_sysmem(load_addr + offset, len);
195
196 memcpy(ptr, src, len);
197 unmap_sysmem(ptr);
198 }
199 #ifdef CONFIG_MCAST_TFTP
200 if (tftp_mcast_active)
201 ext2_set_bit(block, tftp_mcast_bitmap);
202 #endif
203
204 if (net_boot_file_size < newsize)
205 net_boot_file_size = newsize;
206 }
207
208 /* Clear our state ready for a new transfer */
new_transfer(void)209 static void new_transfer(void)
210 {
211 tftp_prev_block = 0;
212 tftp_block_wrap = 0;
213 tftp_block_wrap_offset = 0;
214 #ifdef CONFIG_CMD_TFTPPUT
215 tftp_put_final_block_sent = 0;
216 #endif
217 }
218
219 #ifdef CONFIG_CMD_TFTPPUT
220 /**
221 * Load the next block from memory to be sent over tftp.
222 *
223 * @param block Block number to send
224 * @param dst Destination buffer for data
225 * @param len Number of bytes in block (this one and every other)
226 * @return number of bytes loaded
227 */
load_block(unsigned block,uchar * dst,unsigned len)228 static int load_block(unsigned block, uchar *dst, unsigned len)
229 {
230 /* We may want to get the final block from the previous set */
231 ulong offset = ((int)block - 1) * len + tftp_block_wrap_offset;
232 ulong tosend = len;
233
234 tosend = min(net_boot_file_size - offset, tosend);
235 (void)memcpy(dst, (void *)(save_addr + offset), tosend);
236 debug("%s: block=%d, offset=%ld, len=%d, tosend=%ld\n", __func__,
237 block, offset, len, tosend);
238 return tosend;
239 }
240 #endif
241
242 static void tftp_send(void);
243 static void tftp_timeout_handler(void);
244
245 /**********************************************************************/
246
show_block_marker(void)247 static void show_block_marker(void)
248 {
249 #ifdef CONFIG_TFTP_TSIZE
250 if (tftp_tsize) {
251 ulong pos = tftp_cur_block * tftp_block_size +
252 tftp_block_wrap_offset;
253 if (pos > tftp_tsize)
254 pos = tftp_tsize;
255
256 while (tftp_tsize_num_hash < pos * 50 / tftp_tsize) {
257 putc('#');
258 tftp_tsize_num_hash++;
259 }
260 } else
261 #endif
262 {
263 if (((tftp_cur_block - 1) % 10) == 0)
264 putc('#');
265 else if ((tftp_cur_block % (10 * HASHES_PER_LINE)) == 0)
266 puts("\n\t ");
267 }
268 }
269
270 /**
271 * restart the current transfer due to an error
272 *
273 * @param msg Message to print for user
274 */
restart(const char * msg)275 static void restart(const char *msg)
276 {
277 printf("\n%s; starting again\n", msg);
278 #ifdef CONFIG_MCAST_TFTP
279 mcast_cleanup();
280 #endif
281 net_start_again();
282 }
283
284 /*
285 * Check if the block number has wrapped, and update progress
286 *
287 * TODO: The egregious use of global variables in this file should be tidied.
288 */
update_block_number(void)289 static void update_block_number(void)
290 {
291 /*
292 * RFC1350 specifies that the first data packet will
293 * have sequence number 1. If we receive a sequence
294 * number of 0 this means that there was a wrap
295 * around of the (16 bit) counter.
296 */
297 if (tftp_cur_block == 0 && tftp_prev_block != 0) {
298 tftp_block_wrap++;
299 tftp_block_wrap_offset += tftp_block_size * TFTP_SEQUENCE_SIZE;
300 timeout_count = 0; /* we've done well, reset the timeout */
301 } else {
302 show_block_marker();
303 }
304 }
305
306 /* The TFTP get or put is complete */
tftp_complete(void)307 static void tftp_complete(void)
308 {
309 #ifdef CONFIG_TFTP_TSIZE
310 /* Print hash marks for the last packet received */
311 while (tftp_tsize && tftp_tsize_num_hash < 49) {
312 putc('#');
313 tftp_tsize_num_hash++;
314 }
315 puts(" ");
316 print_size(tftp_tsize, "");
317 #endif
318 time_start = get_timer(time_start);
319 if (time_start > 0) {
320 puts("\n\t "); /* Line up with "Loading: " */
321 print_size(net_boot_file_size /
322 time_start * 1000, "/s");
323 }
324 puts("\ndone\n");
325 net_set_state(NETLOOP_SUCCESS);
326 }
327
tftp_send(void)328 static void tftp_send(void)
329 {
330 uchar *pkt;
331 uchar *xp;
332 int len = 0;
333 ushort *s;
334
335 #ifdef CONFIG_MCAST_TFTP
336 /* Multicast TFTP.. non-MasterClients do not ACK data. */
337 if (tftp_mcast_active && tftp_state == STATE_DATA &&
338 tftp_mcast_master_client == 0)
339 return;
340 #endif
341 /*
342 * We will always be sending some sort of packet, so
343 * cobble together the packet headers now.
344 */
345 pkt = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE;
346
347 switch (tftp_state) {
348 case STATE_SEND_RRQ:
349 case STATE_SEND_WRQ:
350 xp = pkt;
351 s = (ushort *)pkt;
352 #ifdef CONFIG_CMD_TFTPPUT
353 *s++ = htons(tftp_state == STATE_SEND_RRQ ? TFTP_RRQ :
354 TFTP_WRQ);
355 #else
356 *s++ = htons(TFTP_RRQ);
357 #endif
358 pkt = (uchar *)s;
359 strcpy((char *)pkt, tftp_filename);
360 pkt += strlen(tftp_filename) + 1;
361 strcpy((char *)pkt, "octet");
362 pkt += 5 /*strlen("octet")*/ + 1;
363 strcpy((char *)pkt, "timeout");
364 pkt += 7 /*strlen("timeout")*/ + 1;
365 sprintf((char *)pkt, "%lu", timeout_ms / 1000);
366 debug("send option \"timeout %s\"\n", (char *)pkt);
367 pkt += strlen((char *)pkt) + 1;
368 #ifdef CONFIG_TFTP_TSIZE
369 pkt += sprintf((char *)pkt, "tsize%c%u%c",
370 0, net_boot_file_size, 0);
371 #endif
372 /* try for more effic. blk size */
373 pkt += sprintf((char *)pkt, "blksize%c%d%c",
374 0, tftp_block_size_option, 0);
375 #ifdef CONFIG_MCAST_TFTP
376 /* Check all preconditions before even trying the option */
377 if (!tftp_mcast_disabled) {
378 tftp_mcast_bitmap = malloc(tftp_mcast_bitmap_size);
379 if (tftp_mcast_bitmap && eth_get_dev()->mcast) {
380 free(tftp_mcast_bitmap);
381 tftp_mcast_bitmap = NULL;
382 pkt += sprintf((char *)pkt, "multicast%c%c",
383 0, 0);
384 }
385 }
386 #endif /* CONFIG_MCAST_TFTP */
387 len = pkt - xp;
388 break;
389
390 case STATE_OACK:
391 #ifdef CONFIG_MCAST_TFTP
392 /* My turn! Start at where I need blocks I missed. */
393 if (tftp_mcast_active)
394 tftp_cur_block = ext2_find_next_zero_bit(
395 tftp_mcast_bitmap,
396 tftp_mcast_bitmap_size * 8, 0);
397 /* fall through */
398 #endif
399
400 case STATE_RECV_WRQ:
401 case STATE_DATA:
402 xp = pkt;
403 s = (ushort *)pkt;
404 s[0] = htons(TFTP_ACK);
405 s[1] = htons(tftp_cur_block);
406 pkt = (uchar *)(s + 2);
407 #ifdef CONFIG_CMD_TFTPPUT
408 if (tftp_put_active) {
409 int toload = tftp_block_size;
410 int loaded = load_block(tftp_cur_block, pkt, toload);
411
412 s[0] = htons(TFTP_DATA);
413 pkt += loaded;
414 tftp_put_final_block_sent = (loaded < toload);
415 }
416 #endif
417 len = pkt - xp;
418 break;
419
420 case STATE_TOO_LARGE:
421 xp = pkt;
422 s = (ushort *)pkt;
423 *s++ = htons(TFTP_ERROR);
424 *s++ = htons(3);
425
426 pkt = (uchar *)s;
427 strcpy((char *)pkt, "File too large");
428 pkt += 14 /*strlen("File too large")*/ + 1;
429 len = pkt - xp;
430 break;
431
432 case STATE_BAD_MAGIC:
433 xp = pkt;
434 s = (ushort *)pkt;
435 *s++ = htons(TFTP_ERROR);
436 *s++ = htons(2);
437 pkt = (uchar *)s;
438 strcpy((char *)pkt, "File has bad magic");
439 pkt += 18 /*strlen("File has bad magic")*/ + 1;
440 len = pkt - xp;
441 break;
442 }
443
444 net_send_udp_packet(net_server_ethaddr, tftp_remote_ip,
445 tftp_remote_port, tftp_our_port, len);
446 }
447
448 #ifdef CONFIG_CMD_TFTPPUT
icmp_handler(unsigned type,unsigned code,unsigned dest,struct in_addr sip,unsigned src,uchar * pkt,unsigned len)449 static void icmp_handler(unsigned type, unsigned code, unsigned dest,
450 struct in_addr sip, unsigned src, uchar *pkt,
451 unsigned len)
452 {
453 if (type == ICMP_NOT_REACH && code == ICMP_NOT_REACH_PORT) {
454 /* Oh dear the other end has gone away */
455 restart("TFTP server died");
456 }
457 }
458 #endif
459
tftp_handler(uchar * pkt,unsigned dest,struct in_addr sip,unsigned src,unsigned len)460 static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
461 unsigned src, unsigned len)
462 {
463 __be16 proto;
464 __be16 *s;
465 int i;
466
467 if (dest != tftp_our_port) {
468 #ifdef CONFIG_MCAST_TFTP
469 if (tftp_mcast_active &&
470 (!tftp_mcast_port || dest != tftp_mcast_port))
471 #endif
472 return;
473 }
474 if (tftp_state != STATE_SEND_RRQ && src != tftp_remote_port &&
475 tftp_state != STATE_RECV_WRQ && tftp_state != STATE_SEND_WRQ)
476 return;
477
478 if (len < 2)
479 return;
480 len -= 2;
481 /* warning: don't use increment (++) in ntohs() macros!! */
482 s = (__be16 *)pkt;
483 proto = *s++;
484 pkt = (uchar *)s;
485 switch (ntohs(proto)) {
486 case TFTP_RRQ:
487 break;
488
489 case TFTP_ACK:
490 #ifdef CONFIG_CMD_TFTPPUT
491 if (tftp_put_active) {
492 if (tftp_put_final_block_sent) {
493 tftp_complete();
494 } else {
495 /*
496 * Move to the next block. We want our block
497 * count to wrap just like the other end!
498 */
499 int block = ntohs(*s);
500 int ack_ok = (tftp_cur_block == block);
501
502 tftp_cur_block = (unsigned short)(block + 1);
503 update_block_number();
504 if (ack_ok)
505 tftp_send(); /* Send next data block */
506 }
507 }
508 #endif
509 break;
510
511 default:
512 break;
513
514 #ifdef CONFIG_CMD_TFTPSRV
515 case TFTP_WRQ:
516 debug("Got WRQ\n");
517 tftp_remote_ip = sip;
518 tftp_remote_port = src;
519 tftp_our_port = 1024 + (get_timer(0) % 3072);
520 new_transfer();
521 tftp_send(); /* Send ACK(0) */
522 break;
523 #endif
524
525 case TFTP_OACK:
526 debug("Got OACK: %s %s\n",
527 pkt, pkt + strlen((char *)pkt) + 1);
528 tftp_state = STATE_OACK;
529 tftp_remote_port = src;
530 /*
531 * Check for 'blksize' option.
532 * Careful: "i" is signed, "len" is unsigned, thus
533 * something like "len-8" may give a *huge* number
534 */
535 for (i = 0; i+8 < len; i++) {
536 if (strcmp((char *)pkt + i, "blksize") == 0) {
537 tftp_block_size = (unsigned short)
538 simple_strtoul((char *)pkt + i + 8,
539 NULL, 10);
540 debug("Blocksize ack: %s, %d\n",
541 (char *)pkt + i + 8, tftp_block_size);
542 }
543 #ifdef CONFIG_TFTP_TSIZE
544 if (strcmp((char *)pkt+i, "tsize") == 0) {
545 tftp_tsize = simple_strtoul((char *)pkt + i + 6,
546 NULL, 10);
547 debug("size = %s, %d\n",
548 (char *)pkt + i + 6, tftp_tsize);
549 }
550 #endif
551 }
552 #ifdef CONFIG_MCAST_TFTP
553 parse_multicast_oack((char *)pkt, len - 1);
554 if ((tftp_mcast_active) && (!tftp_mcast_master_client))
555 tftp_state = STATE_DATA; /* passive.. */
556 else
557 #endif
558 #ifdef CONFIG_CMD_TFTPPUT
559 if (tftp_put_active) {
560 /* Get ready to send the first block */
561 tftp_state = STATE_DATA;
562 tftp_cur_block++;
563 }
564 #endif
565 tftp_send(); /* Send ACK or first data block */
566 break;
567 case TFTP_DATA:
568 if (len < 2)
569 return;
570 len -= 2;
571 tftp_cur_block = ntohs(*(__be16 *)pkt);
572
573 update_block_number();
574
575 if (tftp_state == STATE_SEND_RRQ)
576 debug("Server did not acknowledge timeout option!\n");
577
578 if (tftp_state == STATE_SEND_RRQ || tftp_state == STATE_OACK ||
579 tftp_state == STATE_RECV_WRQ) {
580 /* first block received */
581 tftp_state = STATE_DATA;
582 tftp_remote_port = src;
583 new_transfer();
584
585 #ifdef CONFIG_MCAST_TFTP
586 if (tftp_mcast_active) { /* start!=1 common if mcast */
587 tftp_prev_block = tftp_cur_block - 1;
588 } else
589 #endif
590 if (tftp_cur_block != 1) { /* Assertion */
591 puts("\nTFTP error: ");
592 printf("First block is not block 1 (%ld)\n",
593 tftp_cur_block);
594 puts("Starting again\n\n");
595 net_start_again();
596 break;
597 }
598 }
599
600 if (tftp_cur_block == tftp_prev_block) {
601 /* Same block again; ignore it. */
602 break;
603 }
604
605 tftp_prev_block = tftp_cur_block;
606 timeout_count_max = tftp_timeout_count_max;
607 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
608
609 store_block(tftp_cur_block - 1, pkt + 2, len);
610
611 /*
612 * Acknowledge the block just received, which will prompt
613 * the remote for the next one.
614 */
615 #ifdef CONFIG_MCAST_TFTP
616 /* if I am the MasterClient, actively calculate what my next
617 * needed block is; else I'm passive; not ACKING
618 */
619 if (tftp_mcast_active) {
620 if (len < tftp_block_size) {
621 tftp_mcast_ending_block = tftp_cur_block;
622 } else if (tftp_mcast_master_client) {
623 tftp_mcast_prev_hole = ext2_find_next_zero_bit(
624 tftp_mcast_bitmap,
625 tftp_mcast_bitmap_size * 8,
626 tftp_mcast_prev_hole);
627 tftp_cur_block = tftp_mcast_prev_hole;
628 if (tftp_cur_block >
629 ((tftp_mcast_bitmap_size * 8) - 1)) {
630 debug("tftpfile too big\n");
631 /* try to double it and retry */
632 tftp_mcast_bitmap_size <<= 1;
633 mcast_cleanup();
634 net_start_again();
635 return;
636 }
637 tftp_prev_block = tftp_cur_block;
638 }
639 }
640 #endif
641 tftp_send();
642
643 #ifdef CONFIG_MCAST_TFTP
644 if (tftp_mcast_active) {
645 if (tftp_mcast_master_client &&
646 (tftp_cur_block >= tftp_mcast_ending_block)) {
647 puts("\nMulticast tftp done\n");
648 mcast_cleanup();
649 net_set_state(NETLOOP_SUCCESS);
650 }
651 } else
652 #endif
653 if (len < tftp_block_size)
654 tftp_complete();
655 break;
656
657 case TFTP_ERROR:
658 printf("\nTFTP error: '%s' (%d)\n",
659 pkt + 2, ntohs(*(__be16 *)pkt));
660
661 switch (ntohs(*(__be16 *)pkt)) {
662 case TFTP_ERR_FILE_NOT_FOUND:
663 case TFTP_ERR_ACCESS_DENIED:
664 puts("Not retrying...\n");
665 eth_halt();
666 net_set_state(NETLOOP_FAIL);
667 break;
668 case TFTP_ERR_UNDEFINED:
669 case TFTP_ERR_DISK_FULL:
670 case TFTP_ERR_UNEXPECTED_OPCODE:
671 case TFTP_ERR_UNKNOWN_TRANSFER_ID:
672 case TFTP_ERR_FILE_ALREADY_EXISTS:
673 default:
674 puts("Starting again\n\n");
675 #ifdef CONFIG_MCAST_TFTP
676 mcast_cleanup();
677 #endif
678 net_start_again();
679 break;
680 }
681 break;
682 }
683 }
684
685
tftp_timeout_handler(void)686 static void tftp_timeout_handler(void)
687 {
688 if (++timeout_count > timeout_count_max) {
689 restart("Retry count exceeded");
690 } else {
691 puts("T ");
692 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
693 if (tftp_state != STATE_RECV_WRQ)
694 tftp_send();
695 }
696 }
697
698
tftp_start(enum proto_t protocol)699 void tftp_start(enum proto_t protocol)
700 {
701 #if CONFIG_NET_TFTP_VARS
702 char *ep; /* Environment pointer */
703
704 /*
705 * Allow the user to choose TFTP blocksize and timeout.
706 * TFTP protocol has a minimal timeout of 1 second.
707 */
708
709 ep = env_get("tftpblocksize");
710 if (ep != NULL)
711 tftp_block_size_option = simple_strtol(ep, NULL, 10);
712
713 ep = env_get("tftptimeout");
714 if (ep != NULL)
715 timeout_ms = simple_strtol(ep, NULL, 10);
716
717 if (timeout_ms < 1000) {
718 printf("TFTP timeout (%ld ms) too low, set min = 1000 ms\n",
719 timeout_ms);
720 timeout_ms = 1000;
721 }
722
723 ep = env_get("tftptimeoutcountmax");
724 if (ep != NULL)
725 tftp_timeout_count_max = simple_strtol(ep, NULL, 10);
726
727 if (tftp_timeout_count_max < 0) {
728 printf("TFTP timeout count max (%d ms) negative, set to 0\n",
729 tftp_timeout_count_max);
730 tftp_timeout_count_max = 0;
731 }
732 #endif
733
734 debug("TFTP blocksize = %i, timeout = %ld ms\n",
735 tftp_block_size_option, timeout_ms);
736
737 tftp_remote_ip = net_server_ip;
738 if (net_boot_file_name[0] == '\0') {
739 sprintf(default_filename, "%02X%02X%02X%02X.img",
740 net_ip.s_addr & 0xFF,
741 (net_ip.s_addr >> 8) & 0xFF,
742 (net_ip.s_addr >> 16) & 0xFF,
743 (net_ip.s_addr >> 24) & 0xFF);
744
745 strncpy(tftp_filename, default_filename, DEFAULT_NAME_LEN);
746 tftp_filename[DEFAULT_NAME_LEN - 1] = 0;
747
748 printf("*** Warning: no boot file name; using '%s'\n",
749 tftp_filename);
750 } else {
751 char *p = strchr(net_boot_file_name, ':');
752
753 if (p == NULL) {
754 strncpy(tftp_filename, net_boot_file_name, MAX_LEN);
755 tftp_filename[MAX_LEN - 1] = 0;
756 } else {
757 tftp_remote_ip = string_to_ip(net_boot_file_name);
758 strncpy(tftp_filename, p + 1, MAX_LEN);
759 tftp_filename[MAX_LEN - 1] = 0;
760 }
761 }
762
763 printf("Using %s device\n", eth_get_name());
764 printf("TFTP %s server %pI4; our IP address is %pI4",
765 #ifdef CONFIG_CMD_TFTPPUT
766 protocol == TFTPPUT ? "to" : "from",
767 #else
768 "from",
769 #endif
770 &tftp_remote_ip, &net_ip);
771
772 /* Check if we need to send across this subnet */
773 if (net_gateway.s_addr && net_netmask.s_addr) {
774 struct in_addr our_net;
775 struct in_addr remote_net;
776
777 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
778 remote_net.s_addr = tftp_remote_ip.s_addr & net_netmask.s_addr;
779 if (our_net.s_addr != remote_net.s_addr)
780 printf("; sending through gateway %pI4", &net_gateway);
781 }
782 putc('\n');
783
784 printf("Filename '%s'.", tftp_filename);
785
786 if (net_boot_file_expected_size_in_blocks) {
787 printf(" Size is 0x%x Bytes = ",
788 net_boot_file_expected_size_in_blocks << 9);
789 print_size(net_boot_file_expected_size_in_blocks << 9, "");
790 }
791
792 putc('\n');
793 #ifdef CONFIG_CMD_TFTPPUT
794 tftp_put_active = (protocol == TFTPPUT);
795 if (tftp_put_active) {
796 printf("Save address: 0x%lx\n", save_addr);
797 printf("Save size: 0x%lx\n", save_size);
798 net_boot_file_size = save_size;
799 puts("Saving: *\b");
800 tftp_state = STATE_SEND_WRQ;
801 new_transfer();
802 } else
803 #endif
804 {
805 printf("Load address: 0x%lx\n", load_addr);
806 puts("Loading: *\b");
807 tftp_state = STATE_SEND_RRQ;
808 #ifdef CONFIG_CMD_BOOTEFI
809 efi_set_bootdev("Net", "", tftp_filename);
810 #endif
811 }
812
813 time_start = get_timer(0);
814 timeout_count_max = tftp_timeout_count_max;
815
816 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
817 net_set_udp_handler(tftp_handler);
818 #ifdef CONFIG_CMD_TFTPPUT
819 net_set_icmp_handler(icmp_handler);
820 #endif
821 tftp_remote_port = WELL_KNOWN_PORT;
822 timeout_count = 0;
823 /* Use a pseudo-random port unless a specific port is set */
824 tftp_our_port = 1024 + (get_timer(0) % 3072);
825
826 #ifdef CONFIG_TFTP_PORT
827 ep = env_get("tftpdstp");
828 if (ep != NULL)
829 tftp_remote_port = simple_strtol(ep, NULL, 10);
830 ep = env_get("tftpsrcp");
831 if (ep != NULL)
832 tftp_our_port = simple_strtol(ep, NULL, 10);
833 #endif
834 tftp_cur_block = 0;
835
836 /* zero out server ether in case the server ip has changed */
837 memset(net_server_ethaddr, 0, 6);
838 /* Revert tftp_block_size to dflt */
839 tftp_block_size = TFTP_BLOCK_SIZE;
840 #ifdef CONFIG_MCAST_TFTP
841 mcast_cleanup();
842 #endif
843 #ifdef CONFIG_TFTP_TSIZE
844 tftp_tsize = 0;
845 tftp_tsize_num_hash = 0;
846 #endif
847
848 tftp_send();
849 }
850
851 #ifdef CONFIG_CMD_TFTPSRV
tftp_start_server(void)852 void tftp_start_server(void)
853 {
854 tftp_filename[0] = 0;
855
856 printf("Using %s device\n", eth_get_name());
857 printf("Listening for TFTP transfer on %pI4\n", &net_ip);
858 printf("Load address: 0x%lx\n", load_addr);
859
860 puts("Loading: *\b");
861
862 timeout_count_max = tftp_timeout_count_max;
863 timeout_count = 0;
864 timeout_ms = TIMEOUT;
865 net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
866
867 /* Revert tftp_block_size to dflt */
868 tftp_block_size = TFTP_BLOCK_SIZE;
869 tftp_cur_block = 0;
870 tftp_our_port = WELL_KNOWN_PORT;
871
872 #ifdef CONFIG_TFTP_TSIZE
873 tftp_tsize = 0;
874 tftp_tsize_num_hash = 0;
875 #endif
876
877 tftp_state = STATE_RECV_WRQ;
878 net_set_udp_handler(tftp_handler);
879
880 /* zero out server ether in case the server ip has changed */
881 memset(net_server_ethaddr, 0, 6);
882 }
883 #endif /* CONFIG_CMD_TFTPSRV */
884
885 #ifdef CONFIG_MCAST_TFTP
886 /*
887 * Credits: atftp project.
888 */
889
890 /*
891 * Pick up BcastAddr, Port, and whether I am [now] the master-client.
892 * Frame:
893 * +-------+-----------+---+-------~~-------+---+
894 * | opc | multicast | 0 | addr, port, mc | 0 |
895 * +-------+-----------+---+-------~~-------+---+
896 * The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
897 * I am the new master-client so must send ACKs to DataBlocks. If I am not
898 * master-client, I'm a passive client, gathering what DataBlocks I may and
899 * making note of which ones I got in my bitmask.
900 * In theory, I never go from master->passive..
901 * .. this comes in with pkt already pointing just past opc
902 */
parse_multicast_oack(char * pkt,int len)903 static void parse_multicast_oack(char *pkt, int len)
904 {
905 int i;
906 struct in_addr addr;
907 char *mc_adr;
908 char *port;
909 char *mc;
910
911 mc_adr = NULL;
912 port = NULL;
913 mc = NULL;
914 /* march along looking for 'multicast\0', which has to start at least
915 * 14 bytes back from the end.
916 */
917 for (i = 0; i < len - 14; i++)
918 if (strcmp(pkt + i, "multicast") == 0)
919 break;
920 if (i >= (len - 14)) /* non-Multicast OACK, ign. */
921 return;
922
923 i += 10; /* strlen multicast */
924 mc_adr = pkt + i;
925 for (; i < len; i++) {
926 if (*(pkt + i) == ',') {
927 *(pkt + i) = '\0';
928 if (port) {
929 mc = pkt + i + 1;
930 break;
931 } else {
932 port = pkt + i + 1;
933 }
934 }
935 }
936 if (!port || !mc_adr || !mc)
937 return;
938 if (tftp_mcast_active && tftp_mcast_master_client) {
939 printf("I got a OACK as master Client, WRONG!\n");
940 return;
941 }
942 /* ..I now accept packets destined for this MCAST addr, port */
943 if (!tftp_mcast_active) {
944 if (tftp_mcast_bitmap) {
945 printf("Internal failure! no mcast.\n");
946 free(tftp_mcast_bitmap);
947 tftp_mcast_bitmap = NULL;
948 tftp_mcast_disabled = 1;
949 return;
950 }
951 /* I malloc instead of pre-declare; so that if the file ends
952 * up being too big for this bitmap I can retry
953 */
954 tftp_mcast_bitmap = malloc(tftp_mcast_bitmap_size);
955 if (!tftp_mcast_bitmap) {
956 printf("No bitmap, no multicast. Sorry.\n");
957 tftp_mcast_disabled = 1;
958 return;
959 }
960 memset(tftp_mcast_bitmap, 0, tftp_mcast_bitmap_size);
961 tftp_mcast_prev_hole = 0;
962 tftp_mcast_active = 1;
963 }
964 addr = string_to_ip(mc_adr);
965 if (net_mcast_addr.s_addr != addr.s_addr) {
966 if (net_mcast_addr.s_addr)
967 eth_mcast_join(net_mcast_addr, 0);
968 net_mcast_addr = addr;
969 if (eth_mcast_join(net_mcast_addr, 1)) {
970 printf("Fail to set mcast, revert to TFTP\n");
971 tftp_mcast_disabled = 1;
972 mcast_cleanup();
973 net_start_again();
974 }
975 }
976 tftp_mcast_master_client = simple_strtoul((char *)mc, NULL, 10);
977 tftp_mcast_port = (unsigned short)simple_strtoul(port, NULL, 10);
978 printf("Multicast: %s:%d [%d]\n", mc_adr, tftp_mcast_port,
979 tftp_mcast_master_client);
980 return;
981 }
982
983 #endif /* Multicast TFTP */
984