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