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, (void *)gd->fdt_blob);
 610
 611         max_size = lmb_get_free_size(&lmb, load_addr);
 612         if (!max_size)
 613                 return -1;
 614
 615         tftp_load_size = max_size;
 616 #endif
 617         tftp_load_addr = load_addr;
 618         return 0;
 619 }
 620
 621 void tftp_start(enum proto_t protocol)
 622 {
 623 #if CONFIG_NET_TFTP_VARS
 624         char *ep;             /* Environment pointer */
 625
 626         /*
 627          * Allow the user to choose TFTP blocksize and timeout.
 628          * TFTP protocol has a minimal timeout of 1 second.
 629          */
 630
 631         ep = env_get("tftpblocksize");
 632         if (ep != NULL)
 633                 tftp_block_size_option = simple_strtol(ep, NULL, 10);
 634
 635         ep = env_get("tftptimeout");
 636         if (ep != NULL)
 637                 timeout_ms = simple_strtol(ep, NULL, 10);
 638
 639         if (timeout_ms < 1000) {
 640                 printf("TFTP timeout (%ld ms) too low, set min = 1000 ms\n",
 641                        timeout_ms);
 642                 timeout_ms = 1000;
 643         }
 644
 645         ep = env_get("tftptimeoutcountmax");
 646         if (ep != NULL)
 647                 tftp_timeout_count_max = simple_strtol(ep, NULL, 10);
 648
 649         if (tftp_timeout_count_max < 0) {
 650                 printf("TFTP timeout count max (%d ms) negative, set to 0\n",
 651                        tftp_timeout_count_max);
 652                 tftp_timeout_count_max = 0;
 653         }
 654 #endif
 655
 656         debug("TFTP blocksize = %i, timeout = %ld ms\n",
 657               tftp_block_size_option, timeout_ms);
 658
 659         tftp_remote_ip = net_server_ip;
 660         if (!net_parse_bootfile(&tftp_remote_ip, tftp_filename, MAX_LEN)) {
 661                 sprintf(default_filename, "%02X%02X%02X%02X.img",
 662                         net_ip.s_addr & 0xFF,
 663                         (net_ip.s_addr >>  8) & 0xFF,
 664                         (net_ip.s_addr >> 16) & 0xFF,
 665                         (net_ip.s_addr >> 24) & 0xFF);
 666
 667                 strncpy(tftp_filename, default_filename, DEFAULT_NAME_LEN);
 668                 tftp_filename[DEFAULT_NAME_LEN - 1] = 0;
 669
 670                 printf("*** Warning: no boot file name; using '%s'\n",
 671                        tftp_filename);
 672         }
 673
 674         printf("Using %s device\n", eth_get_name());
 675         printf("TFTP %s server %pI4; our IP address is %pI4",
 676 #ifdef CONFIG_CMD_TFTPPUT
 677                protocol == TFTPPUT ? "to" : "from",
 678 #else
 679                "from",
 680 #endif
 681                &tftp_remote_ip, &net_ip);
 682
 683         /* Check if we need to send across this subnet */
 684         if (net_gateway.s_addr && net_netmask.s_addr) {
 685                 struct in_addr our_net;
 686                 struct in_addr remote_net;
 687
 688                 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
 689                 remote_net.s_addr = tftp_remote_ip.s_addr & net_netmask.s_addr;
 690                 if (our_net.s_addr != remote_net.s_addr)
 691                         printf("; sending through gateway %pI4", &net_gateway);
 692         }
 693         putc('\n');
 694
 695         printf("Filename '%s'.", tftp_filename);
 696
 697         if (net_boot_file_expected_size_in_blocks) {
 698                 printf(" Size is 0x%x Bytes = ",
 699                        net_boot_file_expected_size_in_blocks << 9);
 700                 print_size(net_boot_file_expected_size_in_blocks << 9, "");
 701         }
 702
 703         putc('\n');
 704 #ifdef CONFIG_CMD_TFTPPUT
 705         tftp_put_active = (protocol == TFTPPUT);
 706         if (tftp_put_active) {
 707                 printf("Save address: 0x%lx\n", save_addr);
 708                 printf("Save size:    0x%lx\n", save_size);
 709                 net_boot_file_size = save_size;
 710                 puts("Saving: *\b");
 711                 tftp_state = STATE_SEND_WRQ;
 712                 new_transfer();
 713         } else
 714 #endif
 715         {
 716                 if (tftp_init_load_addr()) {
 717                         eth_halt();
 718                         net_set_state(NETLOOP_FAIL);
 719                         puts("\nTFTP error: ");
 720                         puts("trying to overwrite reserved memory...\n");
 721                         return;
 722                 }
 723                 printf("Load address: 0x%lx\n", tftp_load_addr);
 724                 puts("Loading: *\b");
 725                 tftp_state = STATE_SEND_RRQ;
 726 #ifdef CONFIG_CMD_BOOTEFI
 727                 efi_set_bootdev("Net", "", tftp_filename);
 728 #endif
 729         }
 730
 731         time_start = get_timer(0);
 732         timeout_count_max = tftp_timeout_count_max;
 733
 734         net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 735         net_set_udp_handler(tftp_handler);
 736 #ifdef CONFIG_CMD_TFTPPUT
 737         net_set_icmp_handler(icmp_handler);
 738 #endif
 739         tftp_remote_port = WELL_KNOWN_PORT;
 740         timeout_count = 0;
 741         /* Use a pseudo-random port unless a specific port is set */
 742         tftp_our_port = 1024 + (get_timer(0) % 3072);
 743
 744 #ifdef CONFIG_TFTP_PORT
 745         ep = env_get("tftpdstp");
 746         if (ep != NULL)
 747                 tftp_remote_port = simple_strtol(ep, NULL, 10);
 748         ep = env_get("tftpsrcp");
 749         if (ep != NULL)
 750                 tftp_our_port = simple_strtol(ep, NULL, 10);
 751 #endif
 752         tftp_cur_block = 0;
 753
 754         /* zero out server ether in case the server ip has changed */
 755         memset(net_server_ethaddr, 0, 6);
 756         /* Revert tftp_block_size to dflt */
 757         tftp_block_size = TFTP_BLOCK_SIZE;
 758 #ifdef CONFIG_TFTP_TSIZE
 759         tftp_tsize = 0;
 760         tftp_tsize_num_hash = 0;
 761 #endif
 762
 763         tftp_send();
 764 }
 765
 766 #ifdef CONFIG_CMD_TFTPSRV
 767 void tftp_start_server(void)
 768 {
 769         tftp_filename[0] = 0;
 770
 771         if (tftp_init_load_addr()) {
 772                 eth_halt();
 773                 net_set_state(NETLOOP_FAIL);
 774                 puts("\nTFTP error: trying to overwrite reserved memory...\n");
 775                 return;
 776         }
 777         printf("Using %s device\n", eth_get_name());
 778         printf("Listening for TFTP transfer on %pI4\n", &net_ip);
 779         printf("Load address: 0x%lx\n", tftp_load_addr);
 780
 781         puts("Loading: *\b");
 782
 783         timeout_count_max = tftp_timeout_count_max;
 784         timeout_count = 0;
 785         timeout_ms = TIMEOUT;
 786         net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
 787
 788         /* Revert tftp_block_size to dflt */
 789         tftp_block_size = TFTP_BLOCK_SIZE;
 790         tftp_cur_block = 0;
 791         tftp_our_port = WELL_KNOWN_PORT;
 792
 793 #ifdef CONFIG_TFTP_TSIZE
 794         tftp_tsize = 0;
 795         tftp_tsize_num_hash = 0;
 796 #endif
 797
 798         tftp_state = STATE_RECV_WRQ;
 799         net_set_udp_handler(tftp_handler);
 800
 801         /* zero out server ether in case the server ip has changed */
 802         memset(net_server_ethaddr, 0, 6);
 803 }
 804 #endif /* CONFIG_CMD_TFTPSRV */
 805