tftp.c 23 KB

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  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. #include <common.h>
  9. #include <command.h>
  10. #include <efi_loader.h>
  11. #include <env.h>
  12. #include <image.h>
  13. #include <lmb.h>
  14. #include <log.h>
  15. #include <mapmem.h>
  16. #include <net.h>
  17. #include <net/tftp.h>
  18. #include "bootp.h"
  19. #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
  20. #include <flash.h>
  21. #endif
  22. DECLARE_GLOBAL_DATA_PTR;
  23. /* Well known TFTP port # */
  24. #define WELL_KNOWN_PORT 69
  25. /* Millisecs to timeout for lost pkt */
  26. #define TIMEOUT 5000UL
  27. #ifndef CONFIG_NET_RETRY_COUNT
  28. /* # of timeouts before giving up */
  29. # define TIMEOUT_COUNT 10
  30. #else
  31. # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT * 2)
  32. #endif
  33. /* Number of "loading" hashes per line (for checking the image size) */
  34. #define HASHES_PER_LINE 65
  35. /*
  36. * TFTP operations.
  37. */
  38. #define TFTP_RRQ 1
  39. #define TFTP_WRQ 2
  40. #define TFTP_DATA 3
  41. #define TFTP_ACK 4
  42. #define TFTP_ERROR 5
  43. #define TFTP_OACK 6
  44. static ulong timeout_ms = TIMEOUT;
  45. static int timeout_count_max = TIMEOUT_COUNT;
  46. static ulong time_start; /* Record time we started tftp */
  47. /*
  48. * These globals govern the timeout behavior when attempting a connection to a
  49. * TFTP server. tftp_timeout_ms specifies the number of milliseconds to
  50. * wait for the server to respond to initial connection. Second global,
  51. * tftp_timeout_count_max, gives the number of such connection retries.
  52. * tftp_timeout_count_max must be non-negative and tftp_timeout_ms must be
  53. * positive. The globals are meant to be set (and restored) by code needing
  54. * non-standard timeout behavior when initiating a TFTP transfer.
  55. */
  56. ulong tftp_timeout_ms = TIMEOUT;
  57. int tftp_timeout_count_max = TIMEOUT_COUNT;
  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. TFTP_ERR_OPTION_NEGOTIATION = 8,
  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. static ulong tftp_load_addr;
  84. #ifdef CONFIG_LMB
  85. static ulong tftp_load_size;
  86. #endif
  87. #ifdef CONFIG_TFTP_TSIZE
  88. /* The file size reported by the server */
  89. static int tftp_tsize;
  90. /* The number of hashes we printed */
  91. static short tftp_tsize_num_hash;
  92. #endif
  93. /* The window size negotiated */
  94. static ushort tftp_windowsize;
  95. /* Next block to send ack to */
  96. static ushort tftp_next_ack;
  97. /* Last nack block we send */
  98. static ushort tftp_last_nack;
  99. #ifdef CONFIG_CMD_TFTPPUT
  100. /* 1 if writing, else 0 */
  101. static int tftp_put_active;
  102. /* 1 if we have sent the last block */
  103. static int tftp_put_final_block_sent;
  104. #else
  105. #define tftp_put_active 0
  106. #endif
  107. #define STATE_SEND_RRQ 1
  108. #define STATE_DATA 2
  109. #define STATE_TOO_LARGE 3
  110. #define STATE_BAD_MAGIC 4
  111. #define STATE_OACK 5
  112. #define STATE_RECV_WRQ 6
  113. #define STATE_SEND_WRQ 7
  114. #define STATE_INVALID_OPTION 8
  115. /* default TFTP block size */
  116. #define TFTP_BLOCK_SIZE 512
  117. /* sequence number is 16 bit */
  118. #define TFTP_SEQUENCE_SIZE ((ulong)(1<<16))
  119. #define DEFAULT_NAME_LEN (8 + 4 + 1)
  120. static char default_filename[DEFAULT_NAME_LEN];
  121. #ifndef CONFIG_TFTP_FILE_NAME_MAX_LEN
  122. #define MAX_LEN 128
  123. #else
  124. #define MAX_LEN CONFIG_TFTP_FILE_NAME_MAX_LEN
  125. #endif
  126. static char tftp_filename[MAX_LEN];
  127. /* 512 is poor choice for ethernet, MTU is typically 1500.
  128. * Minus eth.hdrs thats 1468. Can get 2x better throughput with
  129. * almost-MTU block sizes. At least try... fall back to 512 if need be.
  130. * (but those using CONFIG_IP_DEFRAG may want to set a larger block in cfg file)
  131. */
  132. /* When windowsize is defined to 1,
  133. * tftp behaves the same way as it was
  134. * never declared
  135. */
  136. #ifdef CONFIG_TFTP_WINDOWSIZE
  137. #define TFTP_WINDOWSIZE CONFIG_TFTP_WINDOWSIZE
  138. #else
  139. #define TFTP_WINDOWSIZE 1
  140. #endif
  141. static unsigned short tftp_block_size = TFTP_BLOCK_SIZE;
  142. static unsigned short tftp_block_size_option = CONFIG_TFTP_BLOCKSIZE;
  143. static unsigned short tftp_window_size_option = TFTP_WINDOWSIZE;
  144. static inline int store_block(int block, uchar *src, unsigned int len)
  145. {
  146. ulong offset = block * tftp_block_size + tftp_block_wrap_offset -
  147. tftp_block_size;
  148. ulong newsize = offset + len;
  149. ulong store_addr = tftp_load_addr + offset;
  150. #ifdef CONFIG_SYS_DIRECT_FLASH_TFTP
  151. int i, rc = 0;
  152. for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
  153. /* start address in flash? */
  154. if (flash_info[i].flash_id == FLASH_UNKNOWN)
  155. continue;
  156. if (store_addr >= flash_info[i].start[0]) {
  157. rc = 1;
  158. break;
  159. }
  160. }
  161. if (rc) { /* Flash is destination for this packet */
  162. rc = flash_write((char *)src, store_addr, len);
  163. if (rc) {
  164. flash_perror(rc);
  165. return rc;
  166. }
  167. } else
  168. #endif /* CONFIG_SYS_DIRECT_FLASH_TFTP */
  169. {
  170. void *ptr;
  171. #ifdef CONFIG_LMB
  172. ulong end_addr = tftp_load_addr + tftp_load_size;
  173. if (!end_addr)
  174. end_addr = ULONG_MAX;
  175. if (store_addr < tftp_load_addr ||
  176. store_addr + len > end_addr) {
  177. puts("\nTFTP error: ");
  178. puts("trying to overwrite reserved memory...\n");
  179. return -1;
  180. }
  181. #endif
  182. ptr = map_sysmem(store_addr, len);
  183. memcpy(ptr, src, len);
  184. unmap_sysmem(ptr);
  185. }
  186. if (net_boot_file_size < newsize)
  187. net_boot_file_size = newsize;
  188. return 0;
  189. }
  190. /* Clear our state ready for a new transfer */
  191. static void new_transfer(void)
  192. {
  193. tftp_prev_block = 0;
  194. tftp_block_wrap = 0;
  195. tftp_block_wrap_offset = 0;
  196. #ifdef CONFIG_CMD_TFTPPUT
  197. tftp_put_final_block_sent = 0;
  198. #endif
  199. }
  200. #ifdef CONFIG_CMD_TFTPPUT
  201. /**
  202. * Load the next block from memory to be sent over tftp.
  203. *
  204. * @param block Block number to send
  205. * @param dst Destination buffer for data
  206. * @param len Number of bytes in block (this one and every other)
  207. * @return number of bytes loaded
  208. */
  209. static int load_block(unsigned block, uchar *dst, unsigned len)
  210. {
  211. /* We may want to get the final block from the previous set */
  212. ulong offset = block * tftp_block_size + tftp_block_wrap_offset -
  213. tftp_block_size;
  214. ulong tosend = len;
  215. tosend = min(net_boot_file_size - offset, tosend);
  216. (void)memcpy(dst, (void *)(image_save_addr + offset), tosend);
  217. debug("%s: block=%u, offset=%lu, len=%u, tosend=%lu\n", __func__,
  218. block, offset, len, tosend);
  219. return tosend;
  220. }
  221. #endif
  222. static void tftp_send(void);
  223. static void tftp_timeout_handler(void);
  224. /**********************************************************************/
  225. static void show_block_marker(void)
  226. {
  227. ulong pos;
  228. #ifdef CONFIG_TFTP_TSIZE
  229. if (tftp_tsize) {
  230. pos = tftp_cur_block * tftp_block_size +
  231. tftp_block_wrap_offset;
  232. if (pos > tftp_tsize)
  233. pos = tftp_tsize;
  234. while (tftp_tsize_num_hash < pos * 50 / tftp_tsize) {
  235. putc('#');
  236. tftp_tsize_num_hash++;
  237. }
  238. } else
  239. #endif
  240. {
  241. pos = (tftp_cur_block - 1) +
  242. (tftp_block_wrap * TFTP_SEQUENCE_SIZE);
  243. if ((pos % 10) == 0)
  244. putc('#');
  245. else if (((pos + 1) % (10 * HASHES_PER_LINE)) == 0)
  246. puts("\n\t ");
  247. }
  248. }
  249. /**
  250. * restart the current transfer due to an error
  251. *
  252. * @param msg Message to print for user
  253. */
  254. static void restart(const char *msg)
  255. {
  256. printf("\n%s; starting again\n", msg);
  257. net_start_again();
  258. }
  259. /*
  260. * Check if the block number has wrapped, and update progress
  261. *
  262. * TODO: The egregious use of global variables in this file should be tidied.
  263. */
  264. static void update_block_number(void)
  265. {
  266. /*
  267. * RFC1350 specifies that the first data packet will
  268. * have sequence number 1. If we receive a sequence
  269. * number of 0 this means that there was a wrap
  270. * around of the (16 bit) counter.
  271. */
  272. if (tftp_cur_block == 0 && tftp_prev_block != 0) {
  273. tftp_block_wrap++;
  274. tftp_block_wrap_offset += tftp_block_size * TFTP_SEQUENCE_SIZE;
  275. timeout_count = 0; /* we've done well, reset the timeout */
  276. }
  277. show_block_marker();
  278. }
  279. /* The TFTP get or put is complete */
  280. static void tftp_complete(void)
  281. {
  282. #ifdef CONFIG_TFTP_TSIZE
  283. /* Print hash marks for the last packet received */
  284. while (tftp_tsize && tftp_tsize_num_hash < 49) {
  285. putc('#');
  286. tftp_tsize_num_hash++;
  287. }
  288. puts(" ");
  289. print_size(tftp_tsize, "");
  290. #endif
  291. time_start = get_timer(time_start);
  292. if (time_start > 0) {
  293. puts("\n\t "); /* Line up with "Loading: " */
  294. print_size(net_boot_file_size /
  295. time_start * 1000, "/s");
  296. }
  297. puts("\ndone\n");
  298. if (IS_ENABLED(CONFIG_CMD_BOOTEFI)) {
  299. if (!tftp_put_active)
  300. efi_set_bootdev("Net", "", tftp_filename,
  301. map_sysmem(tftp_load_addr, 0),
  302. net_boot_file_size);
  303. }
  304. net_set_state(NETLOOP_SUCCESS);
  305. }
  306. static void tftp_send(void)
  307. {
  308. uchar *pkt;
  309. uchar *xp;
  310. int len = 0;
  311. ushort *s;
  312. bool err_pkt = false;
  313. /*
  314. * We will always be sending some sort of packet, so
  315. * cobble together the packet headers now.
  316. */
  317. pkt = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE;
  318. switch (tftp_state) {
  319. case STATE_SEND_RRQ:
  320. case STATE_SEND_WRQ:
  321. xp = pkt;
  322. s = (ushort *)pkt;
  323. #ifdef CONFIG_CMD_TFTPPUT
  324. *s++ = htons(tftp_state == STATE_SEND_RRQ ? TFTP_RRQ :
  325. TFTP_WRQ);
  326. #else
  327. *s++ = htons(TFTP_RRQ);
  328. #endif
  329. pkt = (uchar *)s;
  330. strcpy((char *)pkt, tftp_filename);
  331. pkt += strlen(tftp_filename) + 1;
  332. strcpy((char *)pkt, "octet");
  333. pkt += 5 /*strlen("octet")*/ + 1;
  334. strcpy((char *)pkt, "timeout");
  335. pkt += 7 /*strlen("timeout")*/ + 1;
  336. sprintf((char *)pkt, "%lu", timeout_ms / 1000);
  337. debug("send option \"timeout %s\"\n", (char *)pkt);
  338. pkt += strlen((char *)pkt) + 1;
  339. #ifdef CONFIG_TFTP_TSIZE
  340. pkt += sprintf((char *)pkt, "tsize%c%u%c",
  341. 0, net_boot_file_size, 0);
  342. #endif
  343. /* try for more effic. blk size */
  344. pkt += sprintf((char *)pkt, "blksize%c%d%c",
  345. 0, tftp_block_size_option, 0);
  346. /* try for more effic. window size.
  347. * Implemented only for tftp get.
  348. * Don't bother sending if it's 1
  349. */
  350. if (tftp_state == STATE_SEND_RRQ && tftp_window_size_option > 1)
  351. pkt += sprintf((char *)pkt, "windowsize%c%d%c",
  352. 0, tftp_window_size_option, 0);
  353. len = pkt - xp;
  354. break;
  355. case STATE_OACK:
  356. case STATE_RECV_WRQ:
  357. case STATE_DATA:
  358. xp = pkt;
  359. s = (ushort *)pkt;
  360. s[0] = htons(TFTP_ACK);
  361. s[1] = htons(tftp_cur_block);
  362. pkt = (uchar *)(s + 2);
  363. #ifdef CONFIG_CMD_TFTPPUT
  364. if (tftp_put_active) {
  365. int toload = tftp_block_size;
  366. int loaded = load_block(tftp_cur_block, pkt, toload);
  367. s[0] = htons(TFTP_DATA);
  368. pkt += loaded;
  369. tftp_put_final_block_sent = (loaded < toload);
  370. }
  371. #endif
  372. len = pkt - xp;
  373. break;
  374. case STATE_TOO_LARGE:
  375. xp = pkt;
  376. s = (ushort *)pkt;
  377. *s++ = htons(TFTP_ERROR);
  378. *s++ = htons(3);
  379. pkt = (uchar *)s;
  380. strcpy((char *)pkt, "File too large");
  381. pkt += 14 /*strlen("File too large")*/ + 1;
  382. len = pkt - xp;
  383. err_pkt = true;
  384. break;
  385. case STATE_BAD_MAGIC:
  386. xp = pkt;
  387. s = (ushort *)pkt;
  388. *s++ = htons(TFTP_ERROR);
  389. *s++ = htons(2);
  390. pkt = (uchar *)s;
  391. strcpy((char *)pkt, "File has bad magic");
  392. pkt += 18 /*strlen("File has bad magic")*/ + 1;
  393. len = pkt - xp;
  394. err_pkt = true;
  395. break;
  396. case STATE_INVALID_OPTION:
  397. xp = pkt;
  398. s = (ushort *)pkt;
  399. *s++ = htons(TFTP_ERROR);
  400. *s++ = htons(TFTP_ERR_OPTION_NEGOTIATION);
  401. pkt = (uchar *)s;
  402. strcpy((char *)pkt, "Option Negotiation Failed");
  403. /* strlen("Option Negotiation Failed") + NULL*/
  404. pkt += 25 + 1;
  405. len = pkt - xp;
  406. err_pkt = true;
  407. break;
  408. }
  409. net_send_udp_packet(net_server_ethaddr, tftp_remote_ip,
  410. tftp_remote_port, tftp_our_port, len);
  411. if (err_pkt)
  412. net_set_state(NETLOOP_FAIL);
  413. }
  414. #ifdef CONFIG_CMD_TFTPPUT
  415. static void icmp_handler(unsigned type, unsigned code, unsigned dest,
  416. struct in_addr sip, unsigned src, uchar *pkt,
  417. unsigned len)
  418. {
  419. if (type == ICMP_NOT_REACH && code == ICMP_NOT_REACH_PORT) {
  420. /* Oh dear the other end has gone away */
  421. restart("TFTP server died");
  422. }
  423. }
  424. #endif
  425. static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
  426. unsigned src, unsigned len)
  427. {
  428. __be16 proto;
  429. __be16 *s;
  430. int i;
  431. u16 timeout_val_rcvd;
  432. if (dest != tftp_our_port) {
  433. return;
  434. }
  435. if (tftp_state != STATE_SEND_RRQ && src != tftp_remote_port &&
  436. tftp_state != STATE_RECV_WRQ && tftp_state != STATE_SEND_WRQ)
  437. return;
  438. if (len < 2)
  439. return;
  440. len -= 2;
  441. /* warning: don't use increment (++) in ntohs() macros!! */
  442. s = (__be16 *)pkt;
  443. proto = *s++;
  444. pkt = (uchar *)s;
  445. switch (ntohs(proto)) {
  446. case TFTP_RRQ:
  447. break;
  448. case TFTP_ACK:
  449. #ifdef CONFIG_CMD_TFTPPUT
  450. if (tftp_put_active) {
  451. if (tftp_put_final_block_sent) {
  452. tftp_complete();
  453. } else {
  454. /*
  455. * Move to the next block. We want our block
  456. * count to wrap just like the other end!
  457. */
  458. int block = ntohs(*s);
  459. int ack_ok = (tftp_cur_block == block);
  460. tftp_prev_block = tftp_cur_block;
  461. tftp_cur_block = (unsigned short)(block + 1);
  462. update_block_number();
  463. if (ack_ok)
  464. tftp_send(); /* Send next data block */
  465. }
  466. }
  467. #endif
  468. break;
  469. default:
  470. break;
  471. #ifdef CONFIG_CMD_TFTPSRV
  472. case TFTP_WRQ:
  473. debug("Got WRQ\n");
  474. tftp_remote_ip = sip;
  475. tftp_remote_port = src;
  476. tftp_our_port = 1024 + (get_timer(0) % 3072);
  477. new_transfer();
  478. tftp_send(); /* Send ACK(0) */
  479. break;
  480. #endif
  481. case TFTP_OACK:
  482. debug("Got OACK: ");
  483. for (i = 0; i < len; i++) {
  484. if (pkt[i] == '\0')
  485. debug(" ");
  486. else
  487. debug("%c", pkt[i]);
  488. }
  489. debug("\n");
  490. tftp_state = STATE_OACK;
  491. tftp_remote_port = src;
  492. /*
  493. * Check for 'blksize' option.
  494. * Careful: "i" is signed, "len" is unsigned, thus
  495. * something like "len-8" may give a *huge* number
  496. */
  497. for (i = 0; i+8 < len; i++) {
  498. if (strcasecmp((char *)pkt + i, "blksize") == 0) {
  499. tftp_block_size = (unsigned short)
  500. simple_strtoul((char *)pkt + i + 8,
  501. NULL, 10);
  502. debug("Blocksize oack: %s, %d\n",
  503. (char *)pkt + i + 8, tftp_block_size);
  504. if (tftp_block_size > tftp_block_size_option) {
  505. printf("Invalid blk size(=%d)\n",
  506. tftp_block_size);
  507. tftp_state = STATE_INVALID_OPTION;
  508. }
  509. }
  510. if (strcasecmp((char *)pkt + i, "timeout") == 0) {
  511. timeout_val_rcvd = (unsigned short)
  512. simple_strtoul((char *)pkt + i + 8,
  513. NULL, 10);
  514. debug("Timeout oack: %s, %d\n",
  515. (char *)pkt + i + 8, timeout_val_rcvd);
  516. if (timeout_val_rcvd != (timeout_ms / 1000)) {
  517. printf("Invalid timeout val(=%d s)\n",
  518. timeout_val_rcvd);
  519. tftp_state = STATE_INVALID_OPTION;
  520. }
  521. }
  522. #ifdef CONFIG_TFTP_TSIZE
  523. if (strcasecmp((char *)pkt + i, "tsize") == 0) {
  524. tftp_tsize = simple_strtoul((char *)pkt + i + 6,
  525. NULL, 10);
  526. debug("size = %s, %d\n",
  527. (char *)pkt + i + 6, tftp_tsize);
  528. }
  529. #endif
  530. if (strcasecmp((char *)pkt + i, "windowsize") == 0) {
  531. tftp_windowsize =
  532. simple_strtoul((char *)pkt + i + 11,
  533. NULL, 10);
  534. debug("windowsize = %s, %d\n",
  535. (char *)pkt + i + 11, tftp_windowsize);
  536. }
  537. }
  538. tftp_next_ack = tftp_windowsize;
  539. #ifdef CONFIG_CMD_TFTPPUT
  540. if (tftp_put_active && tftp_state == STATE_OACK) {
  541. /* Get ready to send the first block */
  542. tftp_state = STATE_DATA;
  543. tftp_cur_block++;
  544. }
  545. #endif
  546. tftp_send(); /* Send ACK or first data block */
  547. break;
  548. case TFTP_DATA:
  549. if (len < 2)
  550. return;
  551. len -= 2;
  552. if (ntohs(*(__be16 *)pkt) != (ushort)(tftp_cur_block + 1)) {
  553. debug("Received unexpected block: %d, expected: %d\n",
  554. ntohs(*(__be16 *)pkt),
  555. (ushort)(tftp_cur_block + 1));
  556. /*
  557. * If one packet is dropped most likely
  558. * all other buffers in the window
  559. * that will arrive will cause a sending NACK.
  560. * This just overwellms the server, let's just send one.
  561. */
  562. if (tftp_last_nack != tftp_cur_block) {
  563. tftp_send();
  564. tftp_last_nack = tftp_cur_block;
  565. tftp_next_ack = (ushort)(tftp_cur_block +
  566. tftp_windowsize);
  567. }
  568. break;
  569. }
  570. tftp_cur_block++;
  571. tftp_cur_block %= TFTP_SEQUENCE_SIZE;
  572. if (tftp_state == STATE_SEND_RRQ)
  573. debug("Server did not acknowledge any options!\n");
  574. if (tftp_state == STATE_SEND_RRQ || tftp_state == STATE_OACK ||
  575. tftp_state == STATE_RECV_WRQ) {
  576. /* first block received */
  577. tftp_state = STATE_DATA;
  578. tftp_remote_port = src;
  579. new_transfer();
  580. if (tftp_cur_block != 1) { /* Assertion */
  581. puts("\nTFTP error: ");
  582. printf("First block is not block 1 (%ld)\n",
  583. tftp_cur_block);
  584. puts("Starting again\n\n");
  585. net_start_again();
  586. break;
  587. }
  588. }
  589. if (tftp_cur_block == tftp_prev_block) {
  590. /* Same block again; ignore it. */
  591. break;
  592. }
  593. update_block_number();
  594. tftp_prev_block = tftp_cur_block;
  595. timeout_count_max = tftp_timeout_count_max;
  596. net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
  597. if (store_block(tftp_cur_block, pkt + 2, len)) {
  598. eth_halt();
  599. net_set_state(NETLOOP_FAIL);
  600. break;
  601. }
  602. /*
  603. * Acknowledge the block just received, which will prompt
  604. * the remote for the next one.
  605. */
  606. if (tftp_cur_block == tftp_next_ack) {
  607. tftp_send();
  608. tftp_next_ack += tftp_windowsize;
  609. }
  610. if (len < tftp_block_size) {
  611. tftp_send();
  612. tftp_complete();
  613. }
  614. break;
  615. case TFTP_ERROR:
  616. printf("\nTFTP error: '%s' (%d)\n",
  617. pkt + 2, ntohs(*(__be16 *)pkt));
  618. switch (ntohs(*(__be16 *)pkt)) {
  619. case TFTP_ERR_FILE_NOT_FOUND:
  620. case TFTP_ERR_ACCESS_DENIED:
  621. puts("Not retrying...\n");
  622. eth_halt();
  623. net_set_state(NETLOOP_FAIL);
  624. break;
  625. case TFTP_ERR_UNDEFINED:
  626. case TFTP_ERR_DISK_FULL:
  627. case TFTP_ERR_UNEXPECTED_OPCODE:
  628. case TFTP_ERR_UNKNOWN_TRANSFER_ID:
  629. case TFTP_ERR_FILE_ALREADY_EXISTS:
  630. default:
  631. puts("Starting again\n\n");
  632. net_start_again();
  633. break;
  634. }
  635. break;
  636. }
  637. }
  638. static void tftp_timeout_handler(void)
  639. {
  640. if (++timeout_count > timeout_count_max) {
  641. restart("Retry count exceeded");
  642. } else {
  643. puts("T ");
  644. net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
  645. if (tftp_state != STATE_RECV_WRQ)
  646. tftp_send();
  647. }
  648. }
  649. /* Initialize tftp_load_addr and tftp_load_size from image_load_addr and lmb */
  650. static int tftp_init_load_addr(void)
  651. {
  652. #ifdef CONFIG_LMB
  653. struct lmb lmb;
  654. phys_size_t max_size;
  655. lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
  656. max_size = lmb_get_free_size(&lmb, image_load_addr);
  657. if (!max_size)
  658. return -1;
  659. tftp_load_size = max_size;
  660. #endif
  661. tftp_load_addr = image_load_addr;
  662. return 0;
  663. }
  664. void tftp_start(enum proto_t protocol)
  665. {
  666. #if CONFIG_NET_TFTP_VARS
  667. char *ep; /* Environment pointer */
  668. /*
  669. * Allow the user to choose TFTP blocksize and timeout.
  670. * TFTP protocol has a minimal timeout of 1 second.
  671. */
  672. ep = env_get("tftpblocksize");
  673. if (ep != NULL)
  674. tftp_block_size_option = simple_strtol(ep, NULL, 10);
  675. ep = env_get("tftpwindowsize");
  676. if (ep != NULL)
  677. tftp_window_size_option = simple_strtol(ep, NULL, 10);
  678. ep = env_get("tftptimeout");
  679. if (ep != NULL)
  680. timeout_ms = simple_strtol(ep, NULL, 10);
  681. if (timeout_ms < 1000) {
  682. printf("TFTP timeout (%ld ms) too low, set min = 1000 ms\n",
  683. timeout_ms);
  684. timeout_ms = 1000;
  685. }
  686. ep = env_get("tftptimeoutcountmax");
  687. if (ep != NULL)
  688. tftp_timeout_count_max = simple_strtol(ep, NULL, 10);
  689. if (tftp_timeout_count_max < 0) {
  690. printf("TFTP timeout count max (%d ms) negative, set to 0\n",
  691. tftp_timeout_count_max);
  692. tftp_timeout_count_max = 0;
  693. }
  694. #endif
  695. debug("TFTP blocksize = %i, TFTP windowsize = %d timeout = %ld ms\n",
  696. tftp_block_size_option, tftp_window_size_option, timeout_ms);
  697. tftp_remote_ip = net_server_ip;
  698. if (!net_parse_bootfile(&tftp_remote_ip, tftp_filename, MAX_LEN)) {
  699. sprintf(default_filename, "%02X%02X%02X%02X.img",
  700. net_ip.s_addr & 0xFF,
  701. (net_ip.s_addr >> 8) & 0xFF,
  702. (net_ip.s_addr >> 16) & 0xFF,
  703. (net_ip.s_addr >> 24) & 0xFF);
  704. strncpy(tftp_filename, default_filename, DEFAULT_NAME_LEN);
  705. tftp_filename[DEFAULT_NAME_LEN - 1] = 0;
  706. printf("*** Warning: no boot file name; using '%s'\n",
  707. tftp_filename);
  708. }
  709. printf("Using %s device\n", eth_get_name());
  710. printf("TFTP %s server %pI4; our IP address is %pI4",
  711. #ifdef CONFIG_CMD_TFTPPUT
  712. protocol == TFTPPUT ? "to" : "from",
  713. #else
  714. "from",
  715. #endif
  716. &tftp_remote_ip, &net_ip);
  717. /* Check if we need to send across this subnet */
  718. if (net_gateway.s_addr && net_netmask.s_addr) {
  719. struct in_addr our_net;
  720. struct in_addr remote_net;
  721. our_net.s_addr = net_ip.s_addr & net_netmask.s_addr;
  722. remote_net.s_addr = tftp_remote_ip.s_addr & net_netmask.s_addr;
  723. if (our_net.s_addr != remote_net.s_addr)
  724. printf("; sending through gateway %pI4", &net_gateway);
  725. }
  726. putc('\n');
  727. printf("Filename '%s'.", tftp_filename);
  728. if (net_boot_file_expected_size_in_blocks) {
  729. printf(" Size is 0x%x Bytes = ",
  730. net_boot_file_expected_size_in_blocks << 9);
  731. print_size(net_boot_file_expected_size_in_blocks << 9, "");
  732. }
  733. putc('\n');
  734. #ifdef CONFIG_CMD_TFTPPUT
  735. tftp_put_active = (protocol == TFTPPUT);
  736. if (tftp_put_active) {
  737. printf("Save address: 0x%lx\n", image_save_addr);
  738. printf("Save size: 0x%lx\n", image_save_size);
  739. net_boot_file_size = image_save_size;
  740. puts("Saving: *\b");
  741. tftp_state = STATE_SEND_WRQ;
  742. new_transfer();
  743. } else
  744. #endif
  745. {
  746. if (tftp_init_load_addr()) {
  747. eth_halt();
  748. net_set_state(NETLOOP_FAIL);
  749. puts("\nTFTP error: ");
  750. puts("trying to overwrite reserved memory...\n");
  751. return;
  752. }
  753. printf("Load address: 0x%lx\n", tftp_load_addr);
  754. puts("Loading: *\b");
  755. tftp_state = STATE_SEND_RRQ;
  756. }
  757. time_start = get_timer(0);
  758. timeout_count_max = tftp_timeout_count_max;
  759. net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
  760. net_set_udp_handler(tftp_handler);
  761. #ifdef CONFIG_CMD_TFTPPUT
  762. net_set_icmp_handler(icmp_handler);
  763. #endif
  764. tftp_remote_port = WELL_KNOWN_PORT;
  765. timeout_count = 0;
  766. /* Use a pseudo-random port unless a specific port is set */
  767. tftp_our_port = 1024 + (get_timer(0) % 3072);
  768. #ifdef CONFIG_TFTP_PORT
  769. ep = env_get("tftpdstp");
  770. if (ep != NULL)
  771. tftp_remote_port = simple_strtol(ep, NULL, 10);
  772. ep = env_get("tftpsrcp");
  773. if (ep != NULL)
  774. tftp_our_port = simple_strtol(ep, NULL, 10);
  775. #endif
  776. tftp_cur_block = 0;
  777. tftp_windowsize = 1;
  778. tftp_last_nack = 0;
  779. /* zero out server ether in case the server ip has changed */
  780. memset(net_server_ethaddr, 0, 6);
  781. /* Revert tftp_block_size to dflt */
  782. tftp_block_size = TFTP_BLOCK_SIZE;
  783. #ifdef CONFIG_TFTP_TSIZE
  784. tftp_tsize = 0;
  785. tftp_tsize_num_hash = 0;
  786. #endif
  787. tftp_send();
  788. }
  789. #ifdef CONFIG_CMD_TFTPSRV
  790. void tftp_start_server(void)
  791. {
  792. tftp_filename[0] = 0;
  793. if (tftp_init_load_addr()) {
  794. eth_halt();
  795. net_set_state(NETLOOP_FAIL);
  796. puts("\nTFTP error: trying to overwrite reserved memory...\n");
  797. return;
  798. }
  799. printf("Using %s device\n", eth_get_name());
  800. printf("Listening for TFTP transfer on %pI4\n", &net_ip);
  801. printf("Load address: 0x%lx\n", tftp_load_addr);
  802. puts("Loading: *\b");
  803. timeout_count_max = tftp_timeout_count_max;
  804. timeout_count = 0;
  805. timeout_ms = TIMEOUT;
  806. net_set_timeout_handler(timeout_ms, tftp_timeout_handler);
  807. /* Revert tftp_block_size to dflt */
  808. tftp_block_size = TFTP_BLOCK_SIZE;
  809. tftp_cur_block = 0;
  810. tftp_our_port = WELL_KNOWN_PORT;
  811. #ifdef CONFIG_TFTP_TSIZE
  812. tftp_tsize = 0;
  813. tftp_tsize_num_hash = 0;
  814. #endif
  815. tftp_state = STATE_RECV_WRQ;
  816. net_set_udp_handler(tftp_handler);
  817. /* zero out server ether in case the server ip has changed */
  818. memset(net_server_ethaddr, 0, 6);
  819. }
  820. #endif /* CONFIG_CMD_TFTPSRV */