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