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 <mapmem.h>
  12 #include <net.h>
  13 #include "tftp.h"
  14 #include "bootp.h"
  15 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
  16 #include <flash.h>
  17 #endif
  18
  19 /* Well known TFTP port # */
  20 #define WELL_KNOWN_PORT 69
  21 /* Millisecs to timeout for lost pkt */
  22 #define TIMEOUT         5000UL
  23 #ifndef CONFIG_NET_RETRY_COUNT
  24 /* # of timeouts before giving up */
  25 # define TIMEOUT_COUNT  10
  26 #else
  27 # define TIMEOUT_COUNT  (CONFIG_NET_RETRY_COUNT * 2)
  28 #endif
  29 /* Number of "loading" hashes per line (for checking the image size) */
  30 #define HASHES_PER_LINE 65
  31
  32 /*
  33  *      TFTP operations.
  34  */
  35 #define TFTP_RRQ        1
  36 #define TFTP_WRQ        2
  37 #define TFTP_DATA       3
  38 #define TFTP_ACK        4
  39 #define TFTP_ERROR      5
  40 #define TFTP_OACK       6
  41
  42 static ulong timeout_ms = TIMEOUT;
  43 static int timeout_count_max = TIMEOUT_COUNT;
  44 static ulong time_start;   /* Record time we started tftp */
  45
  46 /*
  47  * These globals govern the timeout behavior when attempting a connection to a
  48  * TFTP server. tftp_timeout_ms specifies the number of milliseconds to
  49  * wait for the server to respond to initial connection. Second global,
  50  * tftp_timeout_count_max, gives the number of such connection retries.
  51  * tftp_timeout_count_max must be non-negative and tftp_timeout_ms must be
  52  * positive. The globals are meant to be set (and restored) by code needing
  53  * non-standard timeout behavior when initiating a TFTP transfer.
  54  */
  55 ulong tftp_timeout_ms = TIMEOUT;
  56 int tftp_timeout_count_max = TIMEOUT_COUNT;
  57
  58 enum {
  59         TFTP_ERR_UNDEFINED           = 0,
  60         TFTP_ERR_FILE_NOT_FOUND      = 1,
  61         TFTP_ERR_ACCESS_DENIED       = 2,
  62         TFTP_ERR_DISK_FULL           = 3,
  63         TFTP_ERR_UNEXPECTED_OPCODE   = 4,
  64         TFTP_ERR_UNKNOWN_TRANSFER_ID  = 5,
  65         TFTP_ERR_FILE_ALREADY_EXISTS = 6,
  66 };
  67
  68 static struct in_addr tftp_remote_ip;
  69 /* The UDP port at their end */
  70 static int      tftp_remote_port;
  71 /* The UDP port at our end */
  72 static int      tftp_our_port;
  73 static int      timeout_count;
  74 /* packet sequence number */
  75 static ulong    tftp_cur_block;
  76 /* last packet sequence number received */
  77 static ulong    tftp_prev_block;
  78 /* count of sequence number wraparounds */
  79 static ulong    tftp_block_wrap;
  80 /* memory offset due to wrapping */
  81 static ulong    tftp_block_wrap_offset;
  82 static int      tftp_state;
  83 #ifdef CONFIG_TFTP_TSIZE
  84 /* The file size reported by the server */
  85 static int      tftp_tsize;
  86 /* The number of hashes we printed */
  87 static short    tftp_tsize_num_hash;
  88 #endif
  89 #ifdef CONFIG_CMD_TFTPPUT
  90 /* 1 if writing, else 0 */
  91 static int      tftp_put_active;
  92 /* 1 if we have sent the last block */
  93 static int      tftp_put_final_block_sent;
  94 #else
  95 #define tftp_put_active 0
  96 #endif
  97
  98 #define STATE_SEND_RRQ  1
  99 #define STATE_DATA      2
 100 #define STATE_TOO_LARGE 3
 101 #define STATE_BAD_MAGIC 4
 102 #define STATE_OACK      5
 103 #define STATE_RECV_WRQ  6
 104 #define STATE_SEND_WRQ  7
 105
 106 /* default TFTP block size */
 107 #define TFTP_BLOCK_SIZE         512
 108 /* sequence number is 16 bit */
 109 #define TFTP_SEQUENCE_SIZE      ((ulong)(1<<16))
 110
 111 #define DEFAULT_NAME_LEN        (8 + 4 + 1)
 112 static char default_filename[DEFAULT_NAME_LEN];
 113
 114 #ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
 115 #define MAX_LEN 128
 116 #else
 117 #define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
 118 #endif
 119
 120 static char tftp_filename[MAX_LEN];
 121
 122 /* 512 is poor choice for ethernet, MTU is typically 1500.
 123  * Minus eth.hdrs thats 1468.  Can get 2x better throughput with
 124  * almost-MTU block sizes.  At least try... fall back to 512 if need be.
 125  * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file)
 126  */
 127 #ifdef CONFIG_TFTP_BLOCKSIZE
 128 #define TFTP_MTU_BLOCKSIZE CONFIG_TFTP_BLOCKSIZE
 129 #else
 130 #define TFTP_MTU_BLOCKSIZE 1468
 131 #endif
 132
 133 static unsigned short tftp_block_size = TFTP_BLOCK_SIZE;
 134 static unsigned short tftp_block_size_option = TFTP_MTU_BLOCKSIZE;
 135
 136 #ifdef CONFIG_MCAST_TFTP
 137 #include <malloc.h>
 138 #define MTFTP_BITMAPSIZE        0x1000
 139 static unsigned *tftp_mcast_bitmap;
 140 static int tftp_mcast_prev_hole;
 141 static int tftp_mcast_bitmap_size = MTFTP_BITMAPSIZE;
 142 static int tftp_mcast_disabled;
 143 static int tftp_mcast_master_client;
 144 static int tftp_mcast_active;
 145 static int tftp_mcast_port;
 146 /* can get 'last' block before done..*/
 147 static ulong tftp_mcast_ending_block;
 148
 149 static void parse_multicast_oack(char *pkt, int len);
 150
 151 static void mcast_cleanup(void)
 152 {
 153         if (net_mcast_addr)
 154                 eth_mcast_join(net_mcast_addr, 0);
 155         if (tftp_mcast_bitmap)
 156                 free(tftp_mcast_bitmap);
 157         tftp_mcast_bitmap = NULL;
 158         net_mcast_addr.s_addr = 0;
 159         tftp_mcast_active = 0;
 160         tftp_mcast_port = 0;
 161         tftp_mcast_ending_block = -1;
 162 }
 163
 164 #endif  /* CONFIG_MCAST_TFTP */
 165
 166 static inline void store_block(int block, uchar *src, unsigned len)
 167 {
 168         ulong offset = block * tftp_block_size + tftp_block_wrap_offset;
 169         ulong newsize = offset + len;
 170 #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
 171         int i, rc = 0;
 172
 173         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 174                 /* start address in flash? */
 175                 if (flash_info[i].flash_id == FLASH_UNKNOWN)
 176                         continue;
 177                 if (load_addr + offset >= flash_info[i].start[0]) {
 178                         rc = 1;
 179                         break;
 180                 }
 181         }
 182
 183         if (rc) { /* Flash is destination for this packet */
 184                 rc = flash_write((char *)src, (ulong)(load_addr+offset), len);
 185                 if (rc) {
 186                         flash_perror(rc);
 187                         net_set_state(NETLOOP_FAIL);
 188                         return;
 189                 }
 190         } else
 191 #endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */
 192         {
 193                 void *ptr = map_sysmem(load_addr + offset, len);
 194
 195                 memcpy(ptr, src, len);
 196                 unmap_sysmem(ptr);
 197         }
 198 #ifdef CONFIG_MCAST_TFTP
 199         if (tftp_mcast_active)
 200                 ext2_set_bit(block, tftp_mcast_bitmap);
 201 #endif
 202
 203         if (net_boot_file_size < newsize)
 204                 net_boot_file_size = newsize;
 205 }
 206
 207 /* Clear our state ready for a new transfer */
 208 static void new_transfer(void)
 209 {
 210         tftp_prev_block = 0;
 211         tftp_block_wrap = 0;
 212         tftp_block_wrap_offset = 0;
 213 #ifdef CONFIG_CMD_TFTPPUT
 214         tftp_put_final_block_sent = 0;
 215 #endif
 216 }
 217
 218 #ifdef CONFIG_CMD_TFTPPUT
 219 /**
 220  * Load the next block from memory to be sent over tftp.
 221  *
 222  * @param block Block number to send
 223  * @param dst   Destination buffer for data
 224  * @param len   Number of bytes in block (this one and every other)
 225  * @return number of bytes loaded
 226  */
 227 static int load_block(unsigned block, uchar *dst, unsigned len)
 228 {
 229         /* We may want to get the final block from the previous set */
 230         ulong offset = ((int)block - 1) * len + tftp_block_wrap_offset;
 231         ulong tosend = len;
 232
 233         tosend = min(net_boot_file_size - offset, tosend);
 234         (void)memcpy(dst, (void *)(save_addr + offset), tosend);
 235         debug("%s: block=%d, offset=%ld, len=%d, tosend=%ld\n", __func__,
 236               block, offset, len, tosend);
 237         return tosend;
 238 }
 239 #endif
 240
 241 static void tftp_send(void);
 242 static void tftp_timeout_handler(void);
 243
 244 /**********************************************************************/
 245
 246 static void show_block_marker(void)
 247 {
 248 #ifdef CONFIG_TFTP_TSIZE
 249         if (tftp_tsize) {
 250                 ulong pos = tftp_cur_block * tftp_block_size +
 251                         tftp_block_wrap_offset;
 252
 253                 while (tftp_tsize_num_hash < pos * 50 / tftp_tsize) {
 254                         putc('#');
 255                         tftp_tsize_num_hash++;
 256                 }
 257         } else
 258 #endif
 259         {
 260                 if (((tftp_cur_block - 1) % 10) == 0)
 261                         putc('#');
 262                 else if ((tftp_cur_block % (10 * HASHES_PER_LINE)) == 0)
 263                         puts("\n\t ");
 264         }
 265 }
 266
 267 /**
 268  * restart the current transfer due to an error
 269  *
 270  * @param msg   Message to print for user
 271  */
 272 static void restart(const char *msg)
 273 {
 274         printf("\n%s; starting again\n", msg);
 275 #ifdef CONFIG_MCAST_TFTP
 276         mcast_cleanup();
 277 #endif
 278         NetStartAgain();
 279 }
 280
 281 /*
 282  * Check if the block number has wrapped, and update progress
 283  *
 284  * TODO: The egregious use of global variables in this file should be tidied.
 285  */
 286 static void update_block_number(void)
 287 {
 288         /*
 289          * RFC1350 specifies that the first data packet will
 290          * have sequence number 1. If we receive a sequence
 291          * number of 0 this means that there was a wrap
 292          * around of the (16 bit) counter.
 293          */
 294         if (tftp_cur_block == 0 && tftp_prev_block != 0) {
 295                 tftp_block_wrap++;
 296                 tftp_block_wrap_offset += tftp_block_size * TFTP_SEQUENCE_SIZE;
 297                 timeout_count = 0; /* we've done well, reset the timeout */
 298         } else {
 299                 show_block_marker();
 300         }
 301 }
 302
 303 /* The TFTP get or put is complete */
 304 static void tftp_complete(void)
 305 {
 306 #ifdef CONFIG_TFTP_TSIZE
 307         /* Print hash marks for the last packet received */
 308         while (tftp_tsize && tftp_tsize_num_hash < 49) {
 309                 putc('#');
 310                 tftp_tsize_num_hash++;
 311         }
 312         puts("  ");
 313         print_size(tftp_tsize, "");
 314 #endif
 315         time_start = get_timer(time_start);
 316         if (time_start > 0) {
 317                 puts("\n\t ");  /* Line up with "Loading: " */
 318                 print_size(net_boot_file_size /
 319                         time_start * 1000, "/s");
 320         }
 321         puts("\ndone\n");
 322         net_set_state(NETLOOP_SUCCESS);
 323 }
 324
 325 static void tftp_send(void)
 326 {
 327         uchar *pkt;
 328         uchar *xp;
 329         int len = 0;
 330         ushort *s;
 331
 332 #ifdef CONFIG_MCAST_TFTP
 333         /* Multicast TFTP.. non-MasterClients do not ACK data. */
 334         if (tftp_mcast_active && tftp_state == STATE_DATA &&
 335             tftp_mcast_master_client == 0)
 336                 return;
 337 #endif
 338         /*
 339          *      We will always be sending some sort of packet, so
 340          *      cobble together the packet headers now.
 341          */
 342         pkt = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE;
 343
 344         switch (tftp_state) {
 345         case STATE_SEND_RRQ:
 346         case STATE_SEND_WRQ:
 347                 xp = pkt;
 348                 s = (ushort *)pkt;
 349 #ifdef CONFIG_CMD_TFTPPUT
 350                 *s++ = htons(tftp_state == STATE_SEND_RRQ ? TFTP_RRQ :
 351                         TFTP_WRQ);
 352 #else
 353                 *s++ = htons(TFTP_RRQ);
 354 #endif
 355                 pkt = (uchar *)s;
 356                 strcpy((char *)pkt, tftp_filename);
 357                 pkt += strlen(tftp_filename) + 1;
 358                 strcpy((char *)pkt, "octet");
 359                 pkt += 5 /*strlen("octet")*/ + 1;
 360                 strcpy((char *)pkt, "timeout");
 361                 pkt += 7 /*strlen("timeout")*/ + 1;
 362                 sprintf((char *)pkt, "%lu", timeout_ms / 1000);
 363                 debug("send option \"timeout %s\"\n", (char *)pkt);
 364                 pkt += strlen((char *)pkt) + 1;
 365 #ifdef CONFIG_TFTP_TSIZE
 366                 pkt += sprintf((char *)pkt, "tsize%c%u%c",
 367                                 0, net_boot_file_size, 0);
 368 #endif
 369                 /* try for more effic. blk size */
 370                 pkt += sprintf((char *)pkt, "blksize%c%d%c",
 371                                 0, tftp_block_size_option, 0);
 372 #ifdef CONFIG_MCAST_TFTP
 373                 /* Check all preconditions before even trying the option */
 374                 if (!tftp_mcast_disabled) {
 375                         tftp_mcast_bitmap = malloc(tftp_mcast_bitmap_size);
 376                         if (tftp_mcast_bitmap && eth_get_dev()->mcast) {
 377                                 free(tftp_mcast_bitmap);
 378                                 tftp_mcast_bitmap = NULL;
 379                                 pkt += sprintf((char *)pkt, "multicast%c%c",
 380                                         0, 0);
 381                         }
 382                 }
 383 #endif /* CONFIG_MCAST_TFTP */
 384                 len = pkt - xp;
 385                 break;
 386
 387         case STATE_OACK:
 388 #ifdef CONFIG_MCAST_TFTP
 389                 /* My turn!  Start at where I need blocks I missed. */
 390                 if (tftp_mcast_active)
 391                         tftp_cur_block = ext2_find_next_zero_bit(
 392                                 tftp_mcast_bitmap,
 393                                 tftp_mcast_bitmap_size * 8, 0);
 394                 /* fall through */
 395 #endif
 396
 397         case STATE_RECV_WRQ:
 398         case STATE_DATA:
 399                 xp = pkt;
 400                 s = (ushort *)pkt;
 401                 s[0] = htons(TFTP_ACK);
 402                 s[1] = htons(tftp_cur_block);
 403                 pkt = (uchar *)(s + 2);
 404 #ifdef CONFIG_CMD_TFTPPUT
 405                 if (tftp_put_active) {
 406                         int toload = tftp_block_size;
 407                         int loaded = load_block(tftp_cur_block, pkt, toload);
 408
 409                         s[0] = htons(TFTP_DATA);
 410                         pkt += loaded;
 411                         tftp_put_final_block_sent = (loaded < toload);
 412                 }
 413 #endif
 414                 len = pkt - xp;
 415                 break;
 416
 417         case STATE_TOO_LARGE:
 418                 xp = pkt;
 419                 s = (ushort *)pkt;
 420                 *s++ = htons(TFTP_ERROR);
 421                         *s++ = htons(3);
 422
 423                 pkt = (uchar *)s;
 424                 strcpy((char *)pkt, "File too large");
 425                 pkt += 14 /*strlen("File too large")*/ + 1;
 426                 len = pkt - xp;
 427                 break;
 428
 429         case STATE_BAD_MAGIC:
 430                 xp = pkt;
 431                 s = (ushort *)pkt;
 432                 *s++ = htons(TFTP_ERROR);
 433                 *s++ = htons(2);
 434                 pkt = (uchar *)s;
 435                 strcpy((char *)pkt, "File has bad magic");
 436                 pkt += 18 /*strlen("File has bad magic")*/ + 1;
 437                 len = pkt - xp;
 438                 break;
 439         }
 440
 441         net_send_udp_packet(net_server_ethaddr, tftp_remote_ip,
 442                             tftp_remote_port, tftp_our_port, len);
 443 }
 444
 445 #ifdef CONFIG_CMD_TFTPPUT
 446 static void icmp_handler(unsigned type, unsigned code, unsigned dest,
 447                          struct in_addr sip, unsigned src, uchar *pkt,
 448                          unsigned len)
 449 {
 450         if (type == ICMP_NOT_REACH && code == ICMP_NOT_REACH_PORT) {
 451                 /* Oh dear the other end has gone away */
 452                 restart("TFTP server died");
 453         }
 454 }
 455 #endif
 456
 457 static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 458                          unsigned src, unsigned len)
 459 {
 460         __be16 proto;
 461         __be16 *s;
 462         int i;
 463
 464         if (dest != tftp_our_port) {
 465 #ifdef CONFIG_MCAST_TFTP
 466                 if (tftp_mcast_active &&
 467                     (!tftp_mcast_port || dest != tftp_mcast_port))
 468 #endif
 469                         return;
 470         }
 471         if (tftp_state != STATE_SEND_RRQ && src != tftp_remote_port &&
 472             tftp_state != STATE_RECV_WRQ && tftp_state != STATE_SEND_WRQ)
 473                 return;
 474
 475         if (len < 2)
 476                 return;
 477         len -= 2;
 478         /* warning: don't use increment (++) in ntohs() macros!! */
 479         s = (__be16 *)pkt;
 480         proto = *s++;
 481         pkt = (uchar *)s;
 482         switch (ntohs(proto)) {
 483         case TFTP_RRQ:
 484                 break;
 485
 486         case TFTP_ACK:
 487 #ifdef CONFIG_CMD_TFTPPUT
 488                 if (tftp_put_active) {
 489                         if (tftp_put_final_block_sent) {
 490                                 tftp_complete();
 491                         } else {
 492                                 /*
 493                                  * Move to the next block. We want our block
 494                                  * count to wrap just like the other end!
 495                                  */
 496                                 int block = ntohs(*s);
 497                                 int ack_ok = (tftp_cur_block == block);
 498
 499                                 tftp_cur_block = (unsigned short)(block + 1);
 500                                 update_block_number();
 501                                 if (ack_ok)
 502                                         tftp_send(); /* Send next data block */
 503                         }
 504                 }
 505 #endif
 506                 break;
 507
 508         default:
 509                 break;
 510
 511 #ifdef CONFIG_CMD_TFTPSRV
 512         case TFTP_WRQ:
 513                 debug("Got WRQ\n");
 514                 tftp_remote_ip = sip;
 515                 tftp_remote_port = src;
 516                 tftp_our_port = 1024 + (get_timer(0) % 3072);
 517                 new_transfer();
 518                 tftp_send(); /* Send ACK(0) */
 519                 break;
 520 #endif
 521
 522         case TFTP_OACK:
 523                 debug("Got OACK: %s %s\n",
 524                       pkt, pkt + strlen((char *)pkt) + 1);
 525                 tftp_state = STATE_OACK;
 526                 tftp_remote_port = src;
 527                 /*
 528                  * Check for 'blksize' option.
 529                  * Careful: "i" is signed, "len" is unsigned, thus
 530                  * something like "len-8" may give a *huge* number
 531                  */
 532                 for (i = 0; i+8 < len; i++) {
 533                         if (strcmp((char *)pkt + i, "blksize") == 0) {
 534                                 tftp_block_size = (unsigned short)
 535                                         simple_strtoul((char *)pkt + i + 8,
 536                                                        NULL, 10);
 537                                 debug("Blocksize ack: %s, %d\n",
 538                                       (char *)pkt + i + 8, tftp_block_size);
 539                         }
 540 #ifdef CONFIG_TFTP_TSIZE
 541                         if (strcmp((char *)pkt+i, "tsize") == 0) {
 542                                 tftp_tsize = simple_strtoul((char *)pkt + i + 6,
 543                                                            NULL, 10);
 544                                 debug("size = %s, %d\n",
 545                                       (char *)pkt + i + 6, tftp_tsize);
 546                         }
 547 #endif
 548                 }
 549 #ifdef CONFIG_MCAST_TFTP
 550                 parse_multicast_oack((char *)pkt, len - 1);
 551                 if ((tftp_mcast_active) && (!tftp_mcast_master_client))
 552                         tftp_state = STATE_DATA;        /* passive.. */
 553                 else
 554 #endif
 555 #ifdef CONFIG_CMD_TFTPPUT
 556                 if (tftp_put_active) {
 557                         /* Get ready to send the first block */
 558                         tftp_state = STATE_DATA;
 559                         tftp_cur_block++;
 560                 }
 561 #endif
 562                 tftp_send(); /* Send ACK or first data block */
 563                 break;
 564         case TFTP_DATA:
 565                 if (len < 2)
 566                         return;
 567                 len -= 2;
 568                 tftp_cur_block = ntohs(*(__be16 *)pkt);
 569
 570                 update_block_number();
 571
 572                 if (tftp_state == STATE_SEND_RRQ)
 573                         debug("Server did not acknowledge timeout option!\n");
 574
 575                 if (tftp_state == STATE_SEND_RRQ || tftp_state == STATE_OACK ||
 576                     tftp_state == STATE_RECV_WRQ) {
 577                         /* first block received */
 578                         tftp_state = STATE_DATA;
 579                         tftp_remote_port = src;
 580                         new_transfer();
 581
 582 #ifdef CONFIG_MCAST_TFTP
 583                         if (tftp_mcast_active) { /* start!=1 common if mcast */
 584                                 tftp_prev_block = tftp_cur_block - 1;
 585                         } else
 586 #endif
 587                         if (tftp_cur_block != 1) {      /* Assertion */
 588                                 puts("\nTFTP error: ");
 589                                 printf("First block is not block 1 (%ld)\n",
 590                                        tftp_cur_block);
 591                                 puts("Starting again\n\n");
 592                                 NetStartAgain();
 593                                 break;
 594                         }
 595                 }
 596
 597                 if (tftp_cur_block == tftp_prev_block) {
 598                         /* Same block again; ignore it. */
 599                         break;
 600                 }
 601
 602                 tftp_prev_block = tftp_cur_block;
 603                 timeout_count_max = TIMEOUT_COUNT;
 604                 NetSetTimeout(timeout_ms, tftp_timeout_handler);
 605
 606                 store_block(tftp_cur_block - 1, pkt + 2, len);
 607
 608                 /*
 609                  *      Acknowledge the block just received, which will prompt
 610                  *      the remote for the next one.
 611                  */
 612 #ifdef CONFIG_MCAST_TFTP
 613                 /* if I am the MasterClient, actively calculate what my next
 614                  * needed block is; else I'm passive; not ACKING
 615                  */
 616                 if (tftp_mcast_active) {
 617                         if (len < tftp_block_size)  {
 618                                 tftp_mcast_ending_block = tftp_cur_block;
 619                         } else if (tftp_mcast_master_client) {
 620                                 tftp_mcast_prev_hole = ext2_find_next_zero_bit(
 621                                         tftp_mcast_bitmap,
 622                                         tftp_mcast_bitmap_size * 8,
 623                                         tftp_mcast_prev_hole);
 624                                 tftp_cur_block = tftp_mcast_prev_hole;
 625                                 if (tftp_cur_block >
 626                                     ((tftp_mcast_bitmap_size * 8) - 1)) {
 627                                         debug("tftpfile too big\n");
 628                                         /* try to double it and retry */
 629                                         tftp_mcast_bitmap_size <<= 1;
 630                                         mcast_cleanup();
 631                                         NetStartAgain();
 632                                         return;
 633                                 }
 634                                 tftp_prev_block = tftp_cur_block;
 635                         }
 636                 }
 637 #endif
 638                 tftp_send();
 639
 640 #ifdef CONFIG_MCAST_TFTP
 641                 if (tftp_mcast_active) {
 642                         if (tftp_mcast_master_client &&
 643                             (tftp_cur_block >= tftp_mcast_ending_block)) {
 644                                 puts("\nMulticast tftp done\n");
 645                                 mcast_cleanup();
 646                                 net_set_state(NETLOOP_SUCCESS);
 647                         }
 648                 } else
 649 #endif
 650                 if (len < tftp_block_size)
 651                         tftp_complete();
 652                 break;
 653
 654         case TFTP_ERROR:
 655                 printf("\nTFTP error: '%s' (%d)\n",
 656                        pkt + 2, ntohs(*(__be16 *)pkt));
 657
 658                 switch (ntohs(*(__be16 *)pkt)) {
 659                 case TFTP_ERR_FILE_NOT_FOUND:
 660                 case TFTP_ERR_ACCESS_DENIED:
 661                         puts("Not retrying...\n");
 662                         eth_halt();
 663                         net_set_state(NETLOOP_FAIL);
 664                         break;
 665                 case TFTP_ERR_UNDEFINED:
 666                 case TFTP_ERR_DISK_FULL:
 667                 case TFTP_ERR_UNEXPECTED_OPCODE:
 668                 case TFTP_ERR_UNKNOWN_TRANSFER_ID:
 669                 case TFTP_ERR_FILE_ALREADY_EXISTS:
 670                 default:
 671                         puts("Starting again\n\n");
 672 #ifdef CONFIG_MCAST_TFTP
 673                         mcast_cleanup();
 674 #endif
 675                         NetStartAgain();
 676                         break;
 677                 }
 678                 break;
 679         }
 680 }
 681
 682
 683 static void tftp_timeout_handler(void)
 684 {
 685         if (++timeout_count > timeout_count_max) {
 686                 restart("Retry count exceeded");
 687         } else {
 688                 puts("T ");
 689                 NetSetTimeout(timeout_ms, tftp_timeout_handler);
 690                 if (tftp_state != STATE_RECV_WRQ)
 691                         tftp_send();
 692         }
 693 }
 694
 695
 696 void tftp_start(enum proto_t protocol)
 697 {
 698         char *ep;             /* Environment pointer */
 699
 700         /*
 701          * Allow the user to choose TFTP blocksize and timeout.
 702          * TFTP protocol has a minimal timeout of 1 second.
 703          */
 704         ep = getenv("tftpblocksize");
 705         if (ep != NULL)
 706                 tftp_block_size_option = simple_strtol(ep, NULL, 10);
 707
 708         ep = getenv("tftptimeout");
 709         if (ep != NULL)
 710                 timeout_ms = simple_strtol(ep, NULL, 10);
 711
 712         if (timeout_ms < 1000) {
 713                 printf("TFTP timeout (%ld ms) too low, set min = 1000 ms\n",
 714                        timeout_ms);
 715                 timeout_ms = 1000;
 716         }
 717
 718         debug("TFTP blocksize = %i, timeout = %ld ms\n",
 719               tftp_block_size_option, timeout_ms);
 720
 721         tftp_remote_ip = net_server_ip;
 722         if (net_boot_file_name[0] == '\0') {
 723                 sprintf(default_filename, "%02X%02X%02X%02X.img",
 724                         net_ip.s_addr & 0xFF,
 725                         (net_ip.s_addr >>  8) & 0xFF,
 726                         (net_ip.s_addr >> 16) & 0xFF,
 727                         (net_ip.s_addr >> 24) & 0xFF);
 728
 729                 strncpy(tftp_filename, default_filename, MAX_LEN);
 730                 tftp_filename[MAX_LEN - 1] = 0;
 731
 732                 printf("*** Warning: no boot file name; using '%s'\n",
 733                        tftp_filename);
 734         } else {
 735                 char *p = strchr(net_boot_file_name, ':');
 736
 737                 if (p == NULL) {
 738                         strncpy(tftp_filename, net_boot_file_name, MAX_LEN);
 739                         tftp_filename[MAX_LEN - 1] = 0;
 740                 } else {
 741                         tftp_remote_ip = string_to_ip(net_boot_file_name);
 742                         strncpy(tftp_filename, p + 1, MAX_LEN);
 743                         tftp_filename[MAX_LEN - 1] = 0;
 744                 }
 745         }
 746
 747         printf("Using %s device\n", eth_get_name());
 748         printf("TFTP %s server %pI4; our IP address is %pI4",
 749 #ifdef CONFIG_CMD_TFTPPUT
 750                protocol == TFTPPUT ? "to" : "from",
 751 #else
 752                "from",
 753 #endif
 754                &tftp_remote_ip, &net_ip);
 755
 756         /* Check if we need to send across this subnet */
 757         if (net_gateway.s_addr && net_netmask.s_addr) {
 758                 struct in_addr our_net;
 759                 struct in_addr remote_net;
 760
 761                 our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
 762                 remote_net.s_addr = tftp_remote_ip.s_addr & net_netmask.s_addr;
 763                 if (our_net.s_addr != remote_net.s_addr)
 764                         printf("; sending through gateway %pI4", &net_gateway);
 765         }
 766         putc('\n');
 767
 768         printf("Filename '%s'.", tftp_filename);
 769
 770         if (net_boot_file_expected_size_in_blocks) {
 771                 printf(" Size is 0x%x Bytes = ",
 772                        net_boot_file_expected_size_in_blocks << 9);
 773                 print_size(net_boot_file_expected_size_in_blocks << 9, "");
 774         }
 775
 776         putc('\n');
 777 #ifdef CONFIG_CMD_TFTPPUT
 778         tftp_put_active = (protocol == TFTPPUT);
 779         if (tftp_put_active) {
 780                 printf("Save address: 0x%lx\n", save_addr);
 781                 printf("Save size:    0x%lx\n", save_size);
 782                 net_boot_file_size = save_size;
 783                 puts("Saving: *\b");
 784                 tftp_state = STATE_SEND_WRQ;
 785                 new_transfer();
 786         } else
 787 #endif
 788         {
 789                 printf("Load address: 0x%lx\n", load_addr);
 790                 puts("Loading: *\b");
 791                 tftp_state = STATE_SEND_RRQ;
 792         }
 793
 794         time_start = get_timer(0);
 795         timeout_count_max = tftp_timeout_count_max;
 796
 797         NetSetTimeout(timeout_ms, tftp_timeout_handler);
 798         net_set_udp_handler(tftp_handler);
 799 #ifdef CONFIG_CMD_TFTPPUT
 800         net_set_icmp_handler(icmp_handler);
 801 #endif
 802         tftp_remote_port = WELL_KNOWN_PORT;
 803         timeout_count = 0;
 804         /* Use a pseudo-random port unless a specific port is set */
 805         tftp_our_port = 1024 + (get_timer(0) % 3072);
 806
 807 #ifdef CONFIG_TFTP_PORT
 808         ep = getenv("tftpdstp");
 809         if (ep != NULL)
 810                 tftp_remote_port = simple_strtol(ep, NULL, 10);
 811         ep = getenv("tftpsrcp");
 812         if (ep != NULL)
 813                 tftp_our_port = simple_strtol(ep, NULL, 10);
 814 #endif
 815         tftp_cur_block = 0;
 816
 817         /* zero out server ether in case the server ip has changed */
 818         memset(net_server_ethaddr, 0, 6);
 819         /* Revert tftp_block_size to dflt */
 820         tftp_block_size = TFTP_BLOCK_SIZE;
 821 #ifdef CONFIG_MCAST_TFTP
 822         mcast_cleanup();
 823 #endif
 824 #ifdef CONFIG_TFTP_TSIZE
 825         tftp_tsize = 0;
 826         tftp_tsize_num_hash = 0;
 827 #endif
 828
 829         tftp_send();
 830 }
 831
 832 #ifdef CONFIG_CMD_TFTPSRV
 833 void tftp_start_server(void)
 834 {
 835         tftp_filename[0] = 0;
 836
 837         printf("Using %s device\n", eth_get_name());
 838         printf("Listening for TFTP transfer on %pI4\n", &net_ip);
 839         printf("Load address: 0x%lx\n", load_addr);
 840
 841         puts("Loading: *\b");
 842
 843         timeout_count_max = TIMEOUT_COUNT;
 844         timeout_count = 0;
 845         timeout_ms = TIMEOUT;
 846         NetSetTimeout(timeout_ms, tftp_timeout_handler);
 847
 848         /* Revert tftp_block_size to dflt */
 849         tftp_block_size = TFTP_BLOCK_SIZE;
 850         tftp_cur_block = 0;
 851         tftp_our_port = WELL_KNOWN_PORT;
 852
 853 #ifdef CONFIG_TFTP_TSIZE
 854         tftp_tsize = 0;
 855         tftp_tsize_num_hash = 0;
 856 #endif
 857
 858         tftp_state = STATE_RECV_WRQ;
 859         net_set_udp_handler(tftp_handler);
 860
 861         /* zero out server ether in case the server ip has changed */
 862         memset(net_server_ethaddr, 0, 6);
 863 }
 864 #endif /* CONFIG_CMD_TFTPSRV */
 865
 866 #ifdef CONFIG_MCAST_TFTP
 867 /*
 868  * Credits: atftp project.
 869  */
 870
 871 /*
 872  * Pick up BcastAddr, Port, and whether I am [now] the master-client.
 873  * Frame:
 874  *    +-------+-----------+---+-------~~-------+---+
 875  *    |  opc  | multicast | 0 | addr, port, mc | 0 |
 876  *    +-------+-----------+---+-------~~-------+---+
 877  * The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
 878  * I am the new master-client so must send ACKs to DataBlocks.  If I am not
 879  * master-client, I'm a passive client, gathering what DataBlocks I may and
 880  * making note of which ones I got in my bitmask.
 881  * In theory, I never go from master->passive..
 882  * .. this comes in with pkt already pointing just past opc
 883  */
 884 static void parse_multicast_oack(char *pkt, int len)
 885 {
 886         int i;
 887         struct in_addr addr;
 888         char *mc_adr;
 889         char *port;
 890         char *mc;
 891
 892         mc_adr = NULL;
 893         port = NULL;
 894         mc = NULL;
 895         /* march along looking for 'multicast\0', which has to start at least
 896          * 14 bytes back from the end.
 897          */
 898         for (i = 0; i < len - 14; i++)
 899                 if (strcmp(pkt + i, "multicast") == 0)
 900                         break;
 901         if (i >= (len - 14)) /* non-Multicast OACK, ign. */
 902                 return;
 903
 904         i += 10; /* strlen multicast */
 905         mc_adr = pkt + i;
 906         for (; i < len; i++) {
 907                 if (*(pkt + i) == ',') {
 908                         *(pkt + i) = '\0';
 909                         if (port) {
 910                                 mc = pkt + i + 1;
 911                                 break;
 912                         } else {
 913                                 port = pkt + i + 1;
 914                         }
 915                 }
 916         }
 917         if (!port || !mc_adr || !mc)
 918                 return;
 919         if (tftp_mcast_active && tftp_mcast_master_client) {
 920                 printf("I got a OACK as master Client, WRONG!\n");
 921                 return;
 922         }
 923         /* ..I now accept packets destined for this MCAST addr, port */
 924         if (!tftp_mcast_active) {
 925                 if (tftp_mcast_bitmap) {
 926                         printf("Internal failure! no mcast.\n");
 927                         free(tftp_mcast_bitmap);
 928                         tftp_mcast_bitmap = NULL;
 929                         tftp_mcast_disabled = 1;
 930                         return;
 931                 }
 932                 /* I malloc instead of pre-declare; so that if the file ends
 933                  * up being too big for this bitmap I can retry
 934                  */
 935                 tftp_mcast_bitmap = malloc(tftp_mcast_bitmap_size);
 936                 if (!tftp_mcast_bitmap) {
 937                         printf("No bitmap, no multicast. Sorry.\n");
 938                         tftp_mcast_disabled = 1;
 939                         return;
 940                 }
 941                 memset(tftp_mcast_bitmap, 0, tftp_mcast_bitmap_size);
 942                 tftp_mcast_prev_hole = 0;
 943                 tftp_mcast_active = 1;
 944         }
 945         addr = string_to_ip(mc_adr);
 946         if (net_mcast_addr.s_addr != addr.s_addr) {
 947                 if (net_mcast_addr.s_addr)
 948                         eth_mcast_join(net_mcast_addr, 0);
 949                 net_mcast_addr = addr;
 950                 if (eth_mcast_join(net_mcast_addr, 1)) {
 951                         printf("Fail to set mcast, revert to TFTP\n");
 952                         tftp_mcast_disabled = 1;
 953                         mcast_cleanup();
 954                         NetStartAgain();
 955                 }
 956         }
 957         tftp_mcast_master_client = simple_strtoul((char *)mc, NULL, 10);
 958         tftp_mcast_port = (unsigned short)simple_strtoul(port, NULL, 10);
 959         printf("Multicast: %s:%d [%d]\n", mc_adr, tftp_mcast_port,
 960                tftp_mcast_master_client);
 961         return;
 962 }
 963
 964 #endif /* Multicast TFTP */