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