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