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