1 /* 2 * Copyright 1994, 1995, 2000 Neil Russell. 3 * (See License) 4 * Copyright 2000, 2001 DENX Software Engineering, Wolfgang Denk, wd@denx.de 5 */ 6 7 #include <common.h> 8 #include <command.h> 9 #include <net.h> 10 #include "tftp.h" 11 #include "bootp.h" 12 13 #undef ET_DEBUG 14 15 #if defined(CONFIG_CMD_NET) 16 17 #define WELL_KNOWN_PORT 69 /* Well known TFTP port # */ 18 #define TIMEOUT 5UL /* Seconds to timeout for a lost pkt */ 19 #ifndef CONFIG_NET_RETRY_COUNT 20 # define TIMEOUT_COUNT 10 /* # of timeouts before giving up */ 21 #else 22 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2) 23 #endif 24 /* (for checking the image size) */ 25 #define HASHES_PER_LINE 65 /* Number of "loading" hashes per line */ 26 27 /* 28 * TFTP operations. 29 */ 30 #define TFTP_RRQ 1 31 #define TFTP_WRQ 2 32 #define TFTP_DATA 3 33 #define TFTP_ACK 4 34 #define TFTP_ERROR 5 35 #define TFTP_OACK 6 36 37 static IPaddr_t TftpServerIP; 38 static int TftpServerPort; /* The UDP port at their end */ 39 static int TftpOurPort; /* The UDP port at our end */ 40 static int TftpTimeoutCount; 41 static ulong TftpBlock; /* packet sequence number */ 42 static ulong TftpLastBlock; /* last packet sequence number received */ 43 static ulong TftpBlockWrap; /* count of sequence number wraparounds */ 44 static ulong TftpBlockWrapOffset; /* memory offset due to wrapping */ 45 static int TftpState; 46 47 #define STATE_RRQ 1 48 #define STATE_DATA 2 49 #define STATE_TOO_LARGE 3 50 #define STATE_BAD_MAGIC 4 51 #define STATE_OACK 5 52 53 #define TFTP_BLOCK_SIZE 512 /* default TFTP block size */ 54 #define TFTP_SEQUENCE_SIZE ((ulong)(1<<16)) /* sequence number is 16 bit */ 55 56 #define DEFAULT_NAME_LEN (8 + 4 + 1) 57 static char default_filename[DEFAULT_NAME_LEN]; 58 59 #ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN 60 #define MAX_LEN 128 61 #else 62 #define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN 63 #endif 64 65 static char tftp_filename[MAX_LEN]; 66 67 #ifdef CFG_DIRECT_FLASH_TFTP 68 extern flash_info_t flash_info[]; 69 #endif 70 71 /* 512 is poor choice for ethernet, MTU is typically 1500. 72 * Minus eth.hdrs thats 1468. Can get 2x better throughput with 73 * almost-MTU block sizes. At least try... fall back to 512 if need be. 74 */ 75 #define TFTP_MTU_BLOCKSIZE 1468 76 static unsigned short TftpBlkSize=TFTP_BLOCK_SIZE; 77 static unsigned short TftpBlkSizeOption=TFTP_MTU_BLOCKSIZE; 78 79 #ifdef CONFIG_MCAST_TFTP 80 #include <malloc.h> 81 #define MTFTP_BITMAPSIZE 0x1000 82 static unsigned *Bitmap; 83 static int PrevBitmapHole,Mapsize=MTFTP_BITMAPSIZE; 84 static uchar ProhibitMcast=0, MasterClient=0; 85 static uchar Multicast=0; 86 extern IPaddr_t Mcast_addr; 87 static int Mcast_port; 88 static ulong TftpEndingBlock; /* can get 'last' block before done..*/ 89 90 static void parse_multicast_oack(char *pkt,int len); 91 92 static void 93 mcast_cleanup(void) 94 { 95 if (Mcast_addr) eth_mcast_join(Mcast_addr, 0); 96 if (Bitmap) free(Bitmap); 97 Bitmap=NULL; 98 Mcast_addr = Multicast = Mcast_port = 0; 99 TftpEndingBlock = -1; 100 } 101 102 #endif /* CONFIG_MCAST_TFTP */ 103 104 static __inline__ void 105 store_block (unsigned block, uchar * src, unsigned len) 106 { 107 ulong offset = block * TftpBlkSize + TftpBlockWrapOffset; 108 ulong newsize = offset + len; 109 #ifdef CFG_DIRECT_FLASH_TFTP 110 int i, rc = 0; 111 112 for (i=0; i<CFG_MAX_FLASH_BANKS; i++) { 113 /* start address in flash? */ 114 if (load_addr + offset >= flash_info[i].start[0]) { 115 rc = 1; 116 break; 117 } 118 } 119 120 if (rc) { /* Flash is destination for this packet */ 121 rc = flash_write ((char *)src, (ulong)(load_addr+offset), len); 122 if (rc) { 123 flash_perror (rc); 124 NetState = NETLOOP_FAIL; 125 return; 126 } 127 } 128 else 129 #endif /* CFG_DIRECT_FLASH_TFTP */ 130 { 131 (void)memcpy((void *)(load_addr + offset), src, len); 132 } 133 #ifdef CONFIG_MCAST_TFTP 134 if (Multicast) 135 ext2_set_bit(block, Bitmap); 136 #endif 137 138 if (NetBootFileXferSize < newsize) 139 NetBootFileXferSize = newsize; 140 } 141 142 static void TftpSend (void); 143 static void TftpTimeout (void); 144 145 /**********************************************************************/ 146 147 static void 148 TftpSend (void) 149 { 150 volatile uchar * pkt; 151 volatile uchar * xp; 152 int len = 0; 153 volatile ushort *s; 154 155 #ifdef CONFIG_MCAST_TFTP 156 /* Multicast TFTP.. non-MasterClients do not ACK data. */ 157 if (Multicast 158 && (TftpState == STATE_DATA) 159 && (MasterClient == 0)) 160 return; 161 #endif 162 /* 163 * We will always be sending some sort of packet, so 164 * cobble together the packet headers now. 165 */ 166 pkt = NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE; 167 168 switch (TftpState) { 169 170 case STATE_RRQ: 171 xp = pkt; 172 s = (ushort *)pkt; 173 *s++ = htons(TFTP_RRQ); 174 pkt = (uchar *)s; 175 strcpy ((char *)pkt, tftp_filename); 176 pkt += strlen(tftp_filename) + 1; 177 strcpy ((char *)pkt, "octet"); 178 pkt += 5 /*strlen("octet")*/ + 1; 179 strcpy ((char *)pkt, "timeout"); 180 pkt += 7 /*strlen("timeout")*/ + 1; 181 sprintf((char *)pkt, "%d", TIMEOUT); 182 #ifdef ET_DEBUG 183 printf("send option \"timeout %s\"\n", (char *)pkt); 184 #endif 185 pkt += strlen((char *)pkt) + 1; 186 /* try for more effic. blk size */ 187 pkt += sprintf((char *)pkt,"blksize%c%d%c", 188 0,TftpBlkSizeOption,0); 189 #ifdef CONFIG_MCAST_TFTP 190 /* Check all preconditions before even trying the option */ 191 if (!ProhibitMcast 192 && (Bitmap=malloc(Mapsize)) 193 && eth_get_dev()->mcast) { 194 free(Bitmap); 195 Bitmap=NULL; 196 pkt += sprintf((char *)pkt,"multicast%c%c",0,0); 197 } 198 #endif /* CONFIG_MCAST_TFTP */ 199 len = pkt - xp; 200 break; 201 202 case STATE_OACK: 203 #ifdef CONFIG_MCAST_TFTP 204 /* My turn! Start at where I need blocks I missed.*/ 205 if (Multicast) 206 TftpBlock=ext2_find_next_zero_bit(Bitmap,(Mapsize*8),0); 207 /*..falling..*/ 208 #endif 209 case STATE_DATA: 210 xp = pkt; 211 s = (ushort *)pkt; 212 *s++ = htons(TFTP_ACK); 213 *s++ = htons(TftpBlock); 214 pkt = (uchar *)s; 215 len = pkt - xp; 216 break; 217 218 case STATE_TOO_LARGE: 219 xp = pkt; 220 s = (ushort *)pkt; 221 *s++ = htons(TFTP_ERROR); 222 *s++ = htons(3); 223 pkt = (uchar *)s; 224 strcpy ((char *)pkt, "File too large"); 225 pkt += 14 /*strlen("File too large")*/ + 1; 226 len = pkt - xp; 227 break; 228 229 case STATE_BAD_MAGIC: 230 xp = pkt; 231 s = (ushort *)pkt; 232 *s++ = htons(TFTP_ERROR); 233 *s++ = htons(2); 234 pkt = (uchar *)s; 235 strcpy ((char *)pkt, "File has bad magic"); 236 pkt += 18 /*strlen("File has bad magic")*/ + 1; 237 len = pkt - xp; 238 break; 239 } 240 241 NetSendUDPPacket(NetServerEther, TftpServerIP, TftpServerPort, TftpOurPort, len); 242 } 243 244 245 static void 246 TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 247 { 248 ushort proto; 249 ushort *s; 250 int i; 251 252 if (dest != TftpOurPort) { 253 #ifdef CONFIG_MCAST_TFTP 254 if (Multicast 255 && (!Mcast_port || (dest != Mcast_port))) 256 #endif 257 return; 258 } 259 if (TftpState != STATE_RRQ && src != TftpServerPort) { 260 return; 261 } 262 263 if (len < 2) { 264 return; 265 } 266 len -= 2; 267 /* warning: don't use increment (++) in ntohs() macros!! */ 268 s = (ushort *)pkt; 269 proto = *s++; 270 pkt = (uchar *)s; 271 switch (ntohs(proto)) { 272 273 case TFTP_RRQ: 274 case TFTP_WRQ: 275 case TFTP_ACK: 276 break; 277 default: 278 break; 279 280 case TFTP_OACK: 281 #ifdef ET_DEBUG 282 printf("Got OACK: %s %s\n", pkt, pkt+strlen(pkt)+1); 283 #endif 284 TftpState = STATE_OACK; 285 TftpServerPort = src; 286 /* 287 * Check for 'blksize' option. 288 * Careful: "i" is signed, "len" is unsigned, thus 289 * something like "len-8" may give a *huge* number 290 */ 291 for (i=0; i+8<len; i++) { 292 if (strcmp ((char*)pkt+i,"blksize") == 0) { 293 TftpBlkSize = (unsigned short) 294 simple_strtoul((char*)pkt+i+8,NULL,10); 295 #ifdef ET_DEBUG 296 printf ("Blocksize ack: %s, %d\n", 297 (char*)pkt+i+8,TftpBlkSize); 298 #endif 299 break; 300 } 301 } 302 #ifdef CONFIG_MCAST_TFTP 303 parse_multicast_oack((char *)pkt,len-1); 304 if ((Multicast) && (!MasterClient)) 305 TftpState = STATE_DATA; /* passive.. */ 306 else 307 #endif 308 TftpSend (); /* Send ACK */ 309 break; 310 case TFTP_DATA: 311 if (len < 2) 312 return; 313 len -= 2; 314 TftpBlock = ntohs(*(ushort *)pkt); 315 316 /* 317 * RFC1350 specifies that the first data packet will 318 * have sequence number 1. If we receive a sequence 319 * number of 0 this means that there was a wrap 320 * around of the (16 bit) counter. 321 */ 322 if (TftpBlock == 0) { 323 TftpBlockWrap++; 324 TftpBlockWrapOffset += TftpBlkSize * TFTP_SEQUENCE_SIZE; 325 printf ("\n\t %lu MB received\n\t ", TftpBlockWrapOffset>>20); 326 } else { 327 if (((TftpBlock - 1) % 10) == 0) { 328 putc ('#'); 329 } else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) { 330 puts ("\n\t "); 331 } 332 } 333 334 #ifdef ET_DEBUG 335 if (TftpState == STATE_RRQ) { 336 puts ("Server did not acknowledge timeout option!\n"); 337 } 338 #endif 339 340 if (TftpState == STATE_RRQ || TftpState == STATE_OACK) { 341 /* first block received */ 342 TftpState = STATE_DATA; 343 TftpServerPort = src; 344 TftpLastBlock = 0; 345 TftpBlockWrap = 0; 346 TftpBlockWrapOffset = 0; 347 348 #ifdef CONFIG_MCAST_TFTP 349 if (Multicast) { /* start!=1 common if mcast */ 350 TftpLastBlock = TftpBlock - 1; 351 } else 352 #endif 353 if (TftpBlock != 1) { /* Assertion */ 354 printf ("\nTFTP error: " 355 "First block is not block 1 (%ld)\n" 356 "Starting again\n\n", 357 TftpBlock); 358 NetStartAgain (); 359 break; 360 } 361 } 362 363 if (TftpBlock == TftpLastBlock) { 364 /* 365 * Same block again; ignore it. 366 */ 367 break; 368 } 369 370 TftpLastBlock = TftpBlock; 371 NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); 372 373 store_block (TftpBlock - 1, pkt + 2, len); 374 375 /* 376 * Acknoledge the block just received, which will prompt 377 * the server for the next one. 378 */ 379 #ifdef CONFIG_MCAST_TFTP 380 /* if I am the MasterClient, actively calculate what my next 381 * needed block is; else I'm passive; not ACKING 382 */ 383 if (Multicast) { 384 if (len < TftpBlkSize) { 385 TftpEndingBlock = TftpBlock; 386 } else if (MasterClient) { 387 TftpBlock = PrevBitmapHole = 388 ext2_find_next_zero_bit( 389 Bitmap, 390 (Mapsize*8), 391 PrevBitmapHole); 392 if (TftpBlock > ((Mapsize*8) - 1)) { 393 printf ("tftpfile too big\n"); 394 /* try to double it and retry */ 395 Mapsize<<=1; 396 mcast_cleanup(); 397 NetStartAgain (); 398 return; 399 } 400 TftpLastBlock = TftpBlock; 401 } 402 } 403 #endif 404 TftpSend (); 405 406 #ifdef CONFIG_MCAST_TFTP 407 if (Multicast) { 408 if (MasterClient && (TftpBlock >= TftpEndingBlock)) { 409 puts ("\nMulticast tftp done\n"); 410 mcast_cleanup(); 411 NetState = NETLOOP_SUCCESS; 412 } 413 } 414 else 415 #endif 416 if (len < TftpBlkSize) { 417 /* 418 * We received the whole thing. Try to 419 * run it. 420 */ 421 puts ("\ndone\n"); 422 NetState = NETLOOP_SUCCESS; 423 } 424 break; 425 426 case TFTP_ERROR: 427 printf ("\nTFTP error: '%s' (%d)\n", 428 pkt + 2, ntohs(*(ushort *)pkt)); 429 puts ("Starting again\n\n"); 430 #ifdef CONFIG_MCAST_TFTP 431 mcast_cleanup(); 432 #endif 433 NetStartAgain (); 434 break; 435 } 436 } 437 438 439 static void 440 TftpTimeout (void) 441 { 442 if (++TftpTimeoutCount > TIMEOUT_COUNT) { 443 puts ("\nRetry count exceeded; starting again\n"); 444 #ifdef CONFIG_MCAST_TFTP 445 mcast_cleanup(); 446 #endif 447 NetStartAgain (); 448 } else { 449 puts ("T "); 450 NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); 451 TftpSend (); 452 } 453 } 454 455 456 void 457 TftpStart (void) 458 { 459 #ifdef CONFIG_TFTP_PORT 460 char *ep; /* Environment pointer */ 461 #endif 462 463 TftpServerIP = NetServerIP; 464 if (BootFile[0] == '\0') { 465 sprintf(default_filename, "%02lX%02lX%02lX%02lX.img", 466 NetOurIP & 0xFF, 467 (NetOurIP >> 8) & 0xFF, 468 (NetOurIP >> 16) & 0xFF, 469 (NetOurIP >> 24) & 0xFF ); 470 471 strncpy(tftp_filename, default_filename, MAX_LEN); 472 tftp_filename[MAX_LEN-1] = 0; 473 474 printf ("*** Warning: no boot file name; using '%s'\n", 475 tftp_filename); 476 } else { 477 char *p = strchr (p, ':'); 478 479 if (p == NULL) { 480 strncpy(tftp_filename, BootFile, MAX_LEN); 481 tftp_filename[MAX_LEN-1] = 0; 482 } else { 483 *p++ = '\0'; 484 TftpServerIP = string_to_ip (BootFile); 485 strncpy(tftp_filename, p, MAX_LEN); 486 tftp_filename[MAX_LEN-1] = 0; 487 } 488 } 489 490 #if defined(CONFIG_NET_MULTI) 491 printf ("Using %s device\n", eth_get_name()); 492 #endif 493 puts ("TFTP from server "); print_IPaddr (TftpServerIP); 494 puts ("; our IP address is "); print_IPaddr (NetOurIP); 495 496 /* Check if we need to send across this subnet */ 497 if (NetOurGatewayIP && NetOurSubnetMask) { 498 IPaddr_t OurNet = NetOurIP & NetOurSubnetMask; 499 IPaddr_t ServerNet = TftpServerIP & NetOurSubnetMask; 500 501 if (OurNet != ServerNet) { 502 puts ("; sending through gateway "); 503 print_IPaddr (NetOurGatewayIP) ; 504 } 505 } 506 putc ('\n'); 507 508 printf ("Filename '%s'.", tftp_filename); 509 510 if (NetBootFileSize) { 511 printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9); 512 print_size (NetBootFileSize<<9, ""); 513 } 514 515 putc ('\n'); 516 517 printf ("Load address: 0x%lx\n", load_addr); 518 519 puts ("Loading: *\b"); 520 521 NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); 522 NetSetHandler (TftpHandler); 523 524 TftpServerPort = WELL_KNOWN_PORT; 525 TftpTimeoutCount = 0; 526 TftpState = STATE_RRQ; 527 /* Use a pseudo-random port unless a specific port is set */ 528 TftpOurPort = 1024 + (get_timer(0) % 3072); 529 530 #ifdef CONFIG_TFTP_PORT 531 if ((ep = getenv("tftpdstp")) != NULL) { 532 TftpServerPort = simple_strtol(ep, NULL, 10); 533 } 534 if ((ep = getenv("tftpsrcp")) != NULL) { 535 TftpOurPort= simple_strtol(ep, NULL, 10); 536 } 537 #endif 538 TftpBlock = 0; 539 540 /* zero out server ether in case the server ip has changed */ 541 memset(NetServerEther, 0, 6); 542 /* Revert TftpBlkSize to dflt */ 543 TftpBlkSize = TFTP_BLOCK_SIZE; 544 #ifdef CONFIG_MCAST_TFTP 545 mcast_cleanup(); 546 #endif 547 548 TftpSend (); 549 } 550 551 #ifdef CONFIG_MCAST_TFTP 552 /* Credits: atftp project. 553 */ 554 555 /* pick up BcastAddr, Port, and whether I am [now] the master-client. * 556 * Frame: 557 * +-------+-----------+---+-------~~-------+---+ 558 * | opc | multicast | 0 | addr, port, mc | 0 | 559 * +-------+-----------+---+-------~~-------+---+ 560 * The multicast addr/port becomes what I listen to, and if 'mc' is '1' then 561 * I am the new master-client so must send ACKs to DataBlocks. If I am not 562 * master-client, I'm a passive client, gathering what DataBlocks I may and 563 * making note of which ones I got in my bitmask. 564 * In theory, I never go from master->passive.. 565 * .. this comes in with pkt already pointing just past opc 566 */ 567 static void parse_multicast_oack(char *pkt, int len) 568 { 569 int i; 570 IPaddr_t addr; 571 char *mc_adr, *port, *mc; 572 573 mc_adr=port=mc=NULL; 574 /* march along looking for 'multicast\0', which has to start at least 575 * 14 bytes back from the end. 576 */ 577 for (i=0;i<len-14;i++) 578 if (strcmp (pkt+i,"multicast") == 0) 579 break; 580 if (i >= (len-14)) /* non-Multicast OACK, ign. */ 581 return; 582 583 i+=10; /* strlen multicast */ 584 mc_adr = pkt+i; 585 for (;i<len;i++) { 586 if (*(pkt+i) == ',') { 587 *(pkt+i) = '\0'; 588 if (port) { 589 mc = pkt+i+1; 590 break; 591 } else { 592 port = pkt+i+1; 593 } 594 } 595 } 596 if (!port || !mc_adr || !mc ) return; 597 if (Multicast && MasterClient) { 598 printf ("I got a OACK as master Client, WRONG!\n"); 599 return; 600 } 601 /* ..I now accept packets destined for this MCAST addr, port */ 602 if (!Multicast) { 603 if (Bitmap) { 604 printf ("Internal failure! no mcast.\n"); 605 free(Bitmap); 606 Bitmap=NULL; 607 ProhibitMcast=1; 608 return ; 609 } 610 /* I malloc instead of pre-declare; so that if the file ends 611 * up being too big for this bitmap I can retry 612 */ 613 if (!(Bitmap = malloc (Mapsize))) { 614 printf ("No Bitmap, no multicast. Sorry.\n"); 615 ProhibitMcast=1; 616 return; 617 } 618 memset (Bitmap,0,Mapsize); 619 PrevBitmapHole = 0; 620 Multicast = 1; 621 } 622 addr = string_to_ip(mc_adr); 623 if (Mcast_addr != addr) { 624 if (Mcast_addr) 625 eth_mcast_join(Mcast_addr, 0); 626 if (eth_mcast_join(Mcast_addr=addr, 1)) { 627 printf ("Fail to set mcast, revert to TFTP\n"); 628 ProhibitMcast=1; 629 mcast_cleanup(); 630 NetStartAgain(); 631 } 632 } 633 MasterClient = (unsigned char)simple_strtoul((char *)mc,NULL,10); 634 Mcast_port = (unsigned short)simple_strtoul(port,NULL,10); 635 printf ("Multicast: %s:%d [%d]\n", mc_adr, Mcast_port, MasterClient); 636 return; 637 } 638 639 #endif /* Multicast TFTP */ 640 641 #endif 642