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 (CONFIG_COMMANDS & CFG_CMD_NET) 16 17 #define WELL_KNOWN_PORT 69 /* Well known TFTP port # */ 18 #define TIMEOUT 5 /* 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 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 static char *tftp_filename; 59 60 #ifdef CFG_DIRECT_FLASH_TFTP 61 extern flash_info_t flash_info[]; 62 #endif 63 64 static __inline__ void 65 store_block (unsigned block, uchar * src, unsigned len) 66 { 67 ulong offset = block * TFTP_BLOCK_SIZE + TftpBlockWrapOffset; 68 ulong newsize = offset + len; 69 #ifdef CFG_DIRECT_FLASH_TFTP 70 int i, rc = 0; 71 72 for (i=0; i<CFG_MAX_FLASH_BANKS; i++) { 73 /* start address in flash? */ 74 if (load_addr + offset >= flash_info[i].start[0]) { 75 rc = 1; 76 break; 77 } 78 } 79 80 if (rc) { /* Flash is destination for this packet */ 81 rc = flash_write ((char *)src, (ulong)(load_addr+offset), len); 82 if (rc) { 83 flash_perror (rc); 84 NetState = NETLOOP_FAIL; 85 return; 86 } 87 } 88 else 89 #endif /* CFG_DIRECT_FLASH_TFTP */ 90 { 91 (void)memcpy((void *)(load_addr + offset), src, len); 92 } 93 94 if (NetBootFileXferSize < newsize) 95 NetBootFileXferSize = newsize; 96 } 97 98 static void TftpSend (void); 99 static void TftpTimeout (void); 100 101 /**********************************************************************/ 102 103 static void 104 TftpSend (void) 105 { 106 volatile uchar * pkt; 107 volatile uchar * xp; 108 int len = 0; 109 volatile ushort *s; 110 111 /* 112 * We will always be sending some sort of packet, so 113 * cobble together the packet headers now. 114 */ 115 pkt = NetTxPacket + NetEthHdrSize() + IP_HDR_SIZE; 116 117 switch (TftpState) { 118 119 case STATE_RRQ: 120 xp = pkt; 121 s = (ushort *)pkt; 122 *s++ = htons(TFTP_RRQ); 123 pkt = (uchar *)s; 124 strcpy ((char *)pkt, tftp_filename); 125 pkt += strlen(tftp_filename) + 1; 126 strcpy ((char *)pkt, "octet"); 127 pkt += 5 /*strlen("octet")*/ + 1; 128 strcpy ((char *)pkt, "timeout"); 129 pkt += 7 /*strlen("timeout")*/ + 1; 130 sprintf((char *)pkt, "%d", TIMEOUT); 131 #ifdef ET_DEBUG 132 printf("send option \"timeout %s\"\n", (char *)pkt); 133 #endif 134 pkt += strlen((char *)pkt) + 1; 135 len = pkt - xp; 136 break; 137 138 case STATE_DATA: 139 case STATE_OACK: 140 xp = pkt; 141 s = (ushort *)pkt; 142 *s++ = htons(TFTP_ACK); 143 *s++ = htons(TftpBlock); 144 pkt = (uchar *)s; 145 len = pkt - xp; 146 break; 147 148 case STATE_TOO_LARGE: 149 xp = pkt; 150 s = (ushort *)pkt; 151 *s++ = htons(TFTP_ERROR); 152 *s++ = htons(3); 153 pkt = (uchar *)s; 154 strcpy ((char *)pkt, "File too large"); 155 pkt += 14 /*strlen("File too large")*/ + 1; 156 len = pkt - xp; 157 break; 158 159 case STATE_BAD_MAGIC: 160 xp = pkt; 161 s = (ushort *)pkt; 162 *s++ = htons(TFTP_ERROR); 163 *s++ = htons(2); 164 pkt = (uchar *)s; 165 strcpy ((char *)pkt, "File has bad magic"); 166 pkt += 18 /*strlen("File has bad magic")*/ + 1; 167 len = pkt - xp; 168 break; 169 } 170 171 NetSendUDPPacket(NetServerEther, NetServerIP, TftpServerPort, TftpOurPort, len); 172 } 173 174 175 static void 176 TftpHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 177 { 178 ushort proto; 179 ushort *s; 180 181 if (dest != TftpOurPort) { 182 return; 183 } 184 if (TftpState != STATE_RRQ && src != TftpServerPort) { 185 return; 186 } 187 188 if (len < 2) { 189 return; 190 } 191 len -= 2; 192 /* warning: don't use increment (++) in ntohs() macros!! */ 193 s = (ushort *)pkt; 194 proto = *s++; 195 pkt = (uchar *)s; 196 switch (ntohs(proto)) { 197 198 case TFTP_RRQ: 199 case TFTP_WRQ: 200 case TFTP_ACK: 201 break; 202 default: 203 break; 204 205 case TFTP_OACK: 206 #ifdef ET_DEBUG 207 printf("Got OACK: %s %s\n", pkt, pkt+strlen(pkt)+1); 208 #endif 209 TftpState = STATE_OACK; 210 TftpServerPort = src; 211 TftpSend (); /* Send ACK */ 212 break; 213 case TFTP_DATA: 214 if (len < 2) 215 return; 216 len -= 2; 217 TftpBlock = ntohs(*(ushort *)pkt); 218 219 /* 220 * RFC1350 specifies that the first data packet will 221 * have sequence number 1. If we receive a sequence 222 * number of 0 this means that there was a wrap 223 * around of the (16 bit) counter. 224 */ 225 if (TftpBlock == 0) { 226 TftpBlockWrap++; 227 TftpBlockWrapOffset += TFTP_BLOCK_SIZE * TFTP_SEQUENCE_SIZE; 228 printf ("\n\t %lu MB received\n\t ", TftpBlockWrapOffset>>20); 229 } else { 230 if (((TftpBlock - 1) % 10) == 0) { 231 putc ('#'); 232 } else if ((TftpBlock % (10 * HASHES_PER_LINE)) == 0) { 233 puts ("\n\t "); 234 } 235 } 236 237 #ifdef ET_DEBUG 238 if (TftpState == STATE_RRQ) { 239 puts ("Server did not acknowledge timeout option!\n"); 240 } 241 #endif 242 243 if (TftpState == STATE_RRQ || TftpState == STATE_OACK) { 244 /* first block received */ 245 TftpState = STATE_DATA; 246 TftpServerPort = src; 247 TftpLastBlock = 0; 248 TftpBlockWrap = 0; 249 TftpBlockWrapOffset = 0; 250 251 if (TftpBlock != 1) { /* Assertion */ 252 printf ("\nTFTP error: " 253 "First block is not block 1 (%ld)\n" 254 "Starting again\n\n", 255 TftpBlock); 256 NetStartAgain (); 257 break; 258 } 259 } 260 261 if (TftpBlock == TftpLastBlock) { 262 /* 263 * Same block again; ignore it. 264 */ 265 break; 266 } 267 268 TftpLastBlock = TftpBlock; 269 NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); 270 271 store_block (TftpBlock - 1, pkt + 2, len); 272 273 /* 274 * Acknoledge the block just received, which will prompt 275 * the server for the next one. 276 */ 277 TftpSend (); 278 279 if (len < TFTP_BLOCK_SIZE) { 280 /* 281 * We received the whole thing. Try to 282 * run it. 283 */ 284 puts ("\ndone\n"); 285 NetState = NETLOOP_SUCCESS; 286 } 287 break; 288 289 case TFTP_ERROR: 290 printf ("\nTFTP error: '%s' (%d)\n", 291 pkt + 2, ntohs(*(ushort *)pkt)); 292 puts ("Starting again\n\n"); 293 NetStartAgain (); 294 break; 295 } 296 } 297 298 299 static void 300 TftpTimeout (void) 301 { 302 if (++TftpTimeoutCount > TIMEOUT_COUNT) { 303 puts ("\nRetry count exceeded; starting again\n"); 304 NetStartAgain (); 305 } else { 306 puts ("T "); 307 NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); 308 TftpSend (); 309 } 310 } 311 312 313 void 314 TftpStart (void) 315 { 316 #ifdef CONFIG_TFTP_PORT 317 char *ep; /* Environment pointer */ 318 #endif 319 320 if (BootFile[0] == '\0') { 321 sprintf(default_filename, "%02lX%02lX%02lX%02lX.img", 322 NetOurIP & 0xFF, 323 (NetOurIP >> 8) & 0xFF, 324 (NetOurIP >> 16) & 0xFF, 325 (NetOurIP >> 24) & 0xFF ); 326 tftp_filename = default_filename; 327 328 printf ("*** Warning: no boot file name; using '%s'\n", 329 tftp_filename); 330 } else { 331 tftp_filename = BootFile; 332 } 333 334 #if defined(CONFIG_NET_MULTI) 335 printf ("Using %s device\n", eth_get_name()); 336 #endif 337 puts ("TFTP from server "); print_IPaddr (NetServerIP); 338 puts ("; our IP address is "); print_IPaddr (NetOurIP); 339 340 /* Check if we need to send across this subnet */ 341 if (NetOurGatewayIP && NetOurSubnetMask) { 342 IPaddr_t OurNet = NetOurIP & NetOurSubnetMask; 343 IPaddr_t ServerNet = NetServerIP & NetOurSubnetMask; 344 345 if (OurNet != ServerNet) { 346 puts ("; sending through gateway "); 347 print_IPaddr (NetOurGatewayIP) ; 348 } 349 } 350 putc ('\n'); 351 352 printf ("Filename '%s'.", tftp_filename); 353 354 if (NetBootFileSize) { 355 printf (" Size is 0x%x Bytes = ", NetBootFileSize<<9); 356 print_size (NetBootFileSize<<9, ""); 357 } 358 359 putc ('\n'); 360 361 printf ("Load address: 0x%lx\n", load_addr); 362 363 puts ("Loading: *\b"); 364 365 NetSetTimeout (TIMEOUT * CFG_HZ, TftpTimeout); 366 NetSetHandler (TftpHandler); 367 368 TftpServerPort = WELL_KNOWN_PORT; 369 TftpTimeoutCount = 0; 370 TftpState = STATE_RRQ; 371 /* Use a pseudo-random port unless a specific port is set */ 372 TftpOurPort = 1024 + (get_timer(0) % 3072); 373 #ifdef CONFIG_TFTP_PORT 374 if ((ep = getenv("tftpdstp")) != NULL) { 375 TftpServerPort = simple_strtol(ep, NULL, 10); 376 } 377 if ((ep = getenv("tftpsrcp")) != NULL) { 378 TftpOurPort= simple_strtol(ep, NULL, 10); 379 } 380 #endif 381 TftpBlock = 0; 382 383 /* zero out server ether in case the server ip has changed */ 384 memset(NetServerEther, 0, 6); 385 386 TftpSend (); 387 } 388 389 #endif /* CFG_CMD_NET */ 390