Merge branch 'master' of git://git.denx.de/u-boot
[platform/kernel/u-boot.git] / net / tftp.c
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
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
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 */
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  */
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
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  */
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  */
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 */
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
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
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
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
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
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 = getenv("tftpblocksize");
710         if (ep != NULL)
711                 tftp_block_size_option = simple_strtol(ep, NULL, 10);
712
713         ep = getenv("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 = getenv("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, MAX_LEN);
746                 tftp_filename[MAX_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                 efi_set_bootdev("Net", "", tftp_filename);
809         }
810
811         time_start = get_timer(0);
812         timeout_count_max = tftp_timeout_count_max;
813
814         net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
815         net_set_udp_handler(tftp_handler);
816 #ifdef CONFIG_CMD_TFTPPUT
817         net_set_icmp_handler(icmp_handler);
818 #endif
819         tftp_remote_port = WELL_KNOWN_PORT;
820         timeout_count = 0;
821         /* Use a pseudo-random port unless a specific port is set */
822         tftp_our_port = 1024 + (get_timer(0) % 3072);
823
824 #ifdef CONFIG_TFTP_PORT
825         ep = getenv("tftpdstp");
826         if (ep != NULL)
827                 tftp_remote_port = simple_strtol(ep, NULL, 10);
828         ep = getenv("tftpsrcp");
829         if (ep != NULL)
830                 tftp_our_port = simple_strtol(ep, NULL, 10);
831 #endif
832         tftp_cur_block = 0;
833
834         /* zero out server ether in case the server ip has changed */
835         memset(net_server_ethaddr, 0, 6);
836         /* Revert tftp_block_size to dflt */
837         tftp_block_size = TFTP_BLOCK_SIZE;
838 #ifdef CONFIG_MCAST_TFTP
839         mcast_cleanup();
840 #endif
841 #ifdef CONFIG_TFTP_TSIZE
842         tftp_tsize = 0;
843         tftp_tsize_num_hash = 0;
844 #endif
845
846         tftp_send();
847 }
848
849 #ifdef CONFIG_CMD_TFTPSRV
850 void tftp_start_server(void)
851 {
852         tftp_filename[0] = 0;
853
854         printf("Using %s device\n", eth_get_name());
855         printf("Listening for TFTP transfer on %pI4\n", &net_ip);
856         printf("Load address: 0x%lx\n", load_addr);
857
858         puts("Loading: *\b");
859
860         timeout_count_max = tftp_timeout_count_max;
861         timeout_count = 0;
862         timeout_ms = TIMEOUT;
863         net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
864
865         /* Revert tftp_block_size to dflt */
866         tftp_block_size = TFTP_BLOCK_SIZE;
867         tftp_cur_block = 0;
868         tftp_our_port = WELL_KNOWN_PORT;
869
870 #ifdef CONFIG_TFTP_TSIZE
871         tftp_tsize = 0;
872         tftp_tsize_num_hash = 0;
873 #endif
874
875         tftp_state = STATE_RECV_WRQ;
876         net_set_udp_handler(tftp_handler);
877
878         /* zero out server ether in case the server ip has changed */
879         memset(net_server_ethaddr, 0, 6);
880 }
881 #endif /* CONFIG_CMD_TFTPSRV */
882
883 #ifdef CONFIG_MCAST_TFTP
884 /*
885  * Credits: atftp project.
886  */
887
888 /*
889  * Pick up BcastAddr, Port, and whether I am [now] the master-client.
890  * Frame:
891  *    +-------+-----------+---+-------~~-------+---+
892  *    |  opc  | multicast | 0 | addr, port, mc | 0 |
893  *    +-------+-----------+---+-------~~-------+---+
894  * The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
895  * I am the new master-client so must send ACKs to DataBlocks.  If I am not
896  * master-client, I'm a passive client, gathering what DataBlocks I may and
897  * making note of which ones I got in my bitmask.
898  * In theory, I never go from master->passive..
899  * .. this comes in with pkt already pointing just past opc
900  */
901 static void parse_multicast_oack(char *pkt, int len)
902 {
903         int i;
904         struct in_addr addr;
905         char *mc_adr;
906         char *port;
907         char *mc;
908
909         mc_adr = NULL;
910         port = NULL;
911         mc = NULL;
912         /* march along looking for 'multicast\0', which has to start at least
913          * 14 bytes back from the end.
914          */
915         for (i = 0; i < len - 14; i++)
916                 if (strcmp(pkt + i, "multicast") == 0)
917                         break;
918         if (i >= (len - 14)) /* non-Multicast OACK, ign. */
919                 return;
920
921         i += 10; /* strlen multicast */
922         mc_adr = pkt + i;
923         for (; i < len; i++) {
924                 if (*(pkt + i) == ',') {
925                         *(pkt + i) = '\0';
926                         if (port) {
927                                 mc = pkt + i + 1;
928                                 break;
929                         } else {
930                                 port = pkt + i + 1;
931                         }
932                 }
933         }
934         if (!port || !mc_adr || !mc)
935                 return;
936         if (tftp_mcast_active && tftp_mcast_master_client) {
937                 printf("I got a OACK as master Client, WRONG!\n");
938                 return;
939         }
940         /* ..I now accept packets destined for this MCAST addr, port */
941         if (!tftp_mcast_active) {
942                 if (tftp_mcast_bitmap) {
943                         printf("Internal failure! no mcast.\n");
944                         free(tftp_mcast_bitmap);
945                         tftp_mcast_bitmap = NULL;
946                         tftp_mcast_disabled = 1;
947                         return;
948                 }
949                 /* I malloc instead of pre-declare; so that if the file ends
950                  * up being too big for this bitmap I can retry
951                  */
952                 tftp_mcast_bitmap = malloc(tftp_mcast_bitmap_size);
953                 if (!tftp_mcast_bitmap) {
954                         printf("No bitmap, no multicast. Sorry.\n");
955                         tftp_mcast_disabled = 1;
956                         return;
957                 }
958                 memset(tftp_mcast_bitmap, 0, tftp_mcast_bitmap_size);
959                 tftp_mcast_prev_hole = 0;
960                 tftp_mcast_active = 1;
961         }
962         addr = string_to_ip(mc_adr);
963         if (net_mcast_addr.s_addr != addr.s_addr) {
964                 if (net_mcast_addr.s_addr)
965                         eth_mcast_join(net_mcast_addr, 0);
966                 net_mcast_addr = addr;
967                 if (eth_mcast_join(net_mcast_addr, 1)) {
968                         printf("Fail to set mcast, revert to TFTP\n");
969                         tftp_mcast_disabled = 1;
970                         mcast_cleanup();
971                         net_start_again();
972                 }
973         }
974         tftp_mcast_master_client = simple_strtoul((char *)mc, NULL, 10);
975         tftp_mcast_port = (unsigned short)simple_strtoul(port, NULL, 10);
976         printf("Multicast: %s:%d [%d]\n", mc_adr, tftp_mcast_port,
977                tftp_mcast_master_client);
978         return;
979 }
980
981 #endif /* Multicast TFTP */