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