projects / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 3861aa5c WD |
1 | /* |
| 2 | * Based on LiMon - BOOTP. | |
| 3 | * | |
| 4 | * Copyright 1994, 1995, 2000 Neil Russell. | |
| 5 | * (See License) | |
| 6 | * Copyright 2000 Roland Borde | |
| 7 | * Copyright 2000 Paolo Scaffardi | |
| 8 | * Copyright 2000-2002 Wolfgang Denk, [email protected] | |
| 9 | */ | |
| 10 | ||
| 11 | #if 0 | |
| 12 | #define DEBUG 1 /* general debug */ | |
| 13 | #define DEBUG_BOOTP_EXT 1 /* Debug received vendor fields */ | |
| 14 | #endif | |
| 15 | ||
| 16 | #ifdef DEBUG_BOOTP_EXT | |
| 17 | #define debug_ext(fmt,args...) printf (fmt ,##args) | |
| 18 | #else | |
| 19 | #define debug_ext(fmt,args...) | |
| 20 | #endif | |
| 21 | ||
| 22 | #include <common.h> | |
| 23 | #include <command.h> | |
| 24 | #include <net.h> | |
| 25 | #include "bootp.h" | |
| 26 | #include "tftp.h" | |
| 27 | #include "arp.h" | |
| 28 | #ifdef CONFIG_STATUS_LED | |
| 29 | #include <status_led.h> | |
| 30 | #endif | |
| 31 | ||
| 32 | #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */ | |
| 33 | ||
| 34 | #if (CONFIG_COMMANDS & CFG_CMD_NET) | |
| 35 | ||
| 36 | #define TIMEOUT 5 /* Seconds before trying BOOTP again */ | |
| 37 | #ifndef CONFIG_NET_RETRY_COUNT | |
| 38 | # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ | |
| 39 | #else | |
| 40 | # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) | |
| 41 | #endif | |
| 42 | ||
| 43 | #define PORT_BOOTPS 67 /* BOOTP server UDP port */ | |
| 44 | #define PORT_BOOTPC 68 /* BOOTP client UDP port */ | |
| 45 | ||
| 46 | #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */ | |
| 47 | #define CONFIG_DHCP_MIN_EXT_LEN 64 | |
| 48 | #endif | |
| 49 | ||
| 50 | ulong BootpID; | |
| 51 | int BootpTry; | |
| 52 | #ifdef CONFIG_BOOTP_RANDOM_DELAY | |
| 53 | ulong seed1, seed2; | |
| 54 | #endif | |
| 55 | ||
| 56 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
| 57 | dhcp_state_t dhcp_state = INIT; | |
| 58 | unsigned int dhcp_leasetime = 0; | |
| 59 | static void DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len); | |
| 60 | ||
| 61 | /* For Debug */ | |
| 3e38691e WD |
62 | #if 0 |
| 63 | static char *dhcpmsg2str(int type) | |
| 3861aa5c WD |
64 | { |
| 65 | switch (type) { | |
| 66 | case 1: return "DHCPDISCOVER"; break; | |
| 67 | case 2: return "DHCPOFFER"; break; | |
| 68 | case 3: return "DHCPREQUEST"; break; | |
| 69 | case 4: return "DHCPDECLINE"; break; | |
| 70 | case 5: return "DHCPACK"; break; | |
| 71 | case 6: return "DHCPNACK"; break; | |
| 72 | case 7: return "DHCPRELEASE"; break; | |
| 73 | default: return "UNKNOWN/INVALID MSG TYPE"; break; | |
| 74 | } | |
| 75 | } | |
| 3e38691e | 76 | #endif |
| 3861aa5c WD |
77 | |
| 78 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX) | |
| 79 | extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e after add own opts. */ | |
| 80 | extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL */ | |
| 81 | #endif | |
| 82 | ||
| 83 | #endif /* CFG_CMD_DHCP */ | |
| 84 | ||
| 85 | static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len) | |
| 86 | { | |
| 87 | Bootp_t *bp = (Bootp_t *) pkt; | |
| 88 | int retval = 0; | |
| 89 | ||
| 90 | if (dest != PORT_BOOTPC || src != PORT_BOOTPS) | |
| 91 | retval = -1; | |
| 92 | else if (len < sizeof (Bootp_t) - OPT_SIZE) | |
| 93 | retval = -2; | |
| 94 | else if (bp->bp_op != OP_BOOTREQUEST && | |
| 95 | bp->bp_op != OP_BOOTREPLY && | |
| 96 | bp->bp_op != DHCP_OFFER && | |
| 97 | bp->bp_op != DHCP_ACK && | |
| 98 | bp->bp_op != DHCP_NAK ) { | |
| 99 | retval = -3; | |
| 100 | } | |
| 101 | else if (bp->bp_htype != HWT_ETHER) | |
| 102 | retval = -4; | |
| 103 | else if (bp->bp_hlen != HWL_ETHER) | |
| 104 | retval = -5; | |
| 105 | else if (NetReadLong((ulong*)&bp->bp_id) != BootpID) { | |
| 106 | retval = -6; | |
| 107 | } | |
| 108 | ||
| 109 | debug ("Filtering pkt = %d\n", retval); | |
| 110 | ||
| 111 | return retval; | |
| 112 | } | |
| 113 | ||
| 114 | /* | |
| 115 | * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet | |
| 116 | */ | |
| 3e38691e | 117 | static void BootpCopyNetParams(Bootp_t *bp) |
| 3861aa5c WD |
118 | { |
| 119 | NetCopyIP(&NetOurIP, &bp->bp_yiaddr); | |
| 120 | NetCopyIP(&NetServerIP, &bp->bp_siaddr); | |
| 121 | memcpy (NetServerEther, ((Ethernet_t *)NetRxPkt)->et_src, 6); | |
| 122 | copy_filename (BootFile, bp->bp_file, sizeof(BootFile)); | |
| 123 | ||
| 124 | debug ("Bootfile: %s\n", BootFile); | |
| 125 | ||
| 126 | /* Propagate to environment: | |
| 127 | * don't delete exising entry when BOOTP / DHCP reply does | |
| 128 | * not contain a new value | |
| 129 | */ | |
| 130 | if (*BootFile) { | |
| 131 | setenv ("bootfile", BootFile); | |
| 132 | } | |
| 133 | } | |
| 134 | ||
| 135 | static int truncate_sz (const char *name, int maxlen, int curlen) | |
| 136 | { | |
| 137 | if (curlen >= maxlen) { | |
| 138 | printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n", | |
| 139 | name, curlen, maxlen); | |
| 140 | curlen = maxlen - 1; | |
| 141 | } | |
| 142 | return (curlen); | |
| 143 | } | |
| 144 | ||
| 145 | #if !(CONFIG_COMMANDS & CFG_CMD_DHCP) | |
| 146 | ||
| 147 | static void BootpVendorFieldProcess(u8 *ext) | |
| 148 | { | |
| 149 | int size = *(ext+1) ; | |
| 150 | ||
| 151 | debug_ext ("[BOOTP] Processing extension %d... (%d bytes)\n", *ext, *(ext+1)); | |
| 152 | ||
| 153 | NetBootFileSize = 0; | |
| 154 | ||
| 155 | switch (*ext) { | |
| 156 | /* Fixed length fields */ | |
| 157 | case 1: /* Subnet mask */ | |
| 158 | if (NetOurSubnetMask == 0) | |
| 159 | NetCopyIP(&NetOurSubnetMask, (IPaddr_t*)(ext+2)); | |
| 160 | break; | |
| 161 | case 2: /* Time offset - Not yet supported */ | |
| 162 | break; | |
| 163 | /* Variable length fields */ | |
| 164 | case 3: /* Gateways list */ | |
| 165 | if (NetOurGatewayIP == 0) { | |
| 166 | NetCopyIP(&NetOurGatewayIP, (IPaddr_t*)(ext+2)); | |
| 167 | } | |
| 168 | break; | |
| 169 | case 4: /* Time server - Not yet supported */ | |
| 170 | break; | |
| 171 | case 5: /* IEN-116 name server - Not yet supported */ | |
| 172 | break; | |
| 173 | case 6: | |
| 174 | if (NetOurDNSIP == 0) { | |
| 175 | NetCopyIP(&NetOurDNSIP, (IPaddr_t*)(ext+2)); | |
| 176 | } | |
| 177 | break; | |
| 178 | case 7: /* Log server - Not yet supported */ | |
| 179 | break; | |
| 180 | case 8: /* Cookie/Quote server - Not yet supported */ | |
| 181 | break; | |
| 182 | case 9: /* LPR server - Not yet supported */ | |
| 183 | break; | |
| 184 | case 10: /* Impress server - Not yet supported */ | |
| 185 | break; | |
| 186 | case 11: /* RPL server - Not yet supported */ | |
| 187 | break; | |
| 188 | case 12: /* Host name */ | |
| 189 | if (NetOurHostName[0] == 0) { | |
| 190 | size = truncate_sz("Host Name", sizeof(NetOurHostName), size); | |
| 191 | memcpy(&NetOurHostName, ext+2, size); | |
| 192 | NetOurHostName[size] = 0 ; | |
| 193 | } | |
| 194 | break; | |
| 195 | case 13: /* Boot file size */ | |
| 196 | if (size == 2) | |
| 197 | NetBootFileSize = ntohs(*(ushort*)(ext+2)); | |
| 198 | else if (size == 4) | |
| 199 | NetBootFileSize = ntohl(*(ulong*)(ext+2)); | |
| 200 | break; | |
| 201 | case 14: /* Merit dump file - Not yet supported */ | |
| 202 | break; | |
| 203 | case 15: /* Domain name - Not yet supported */ | |
| 204 | break; | |
| 205 | case 16: /* Swap server - Not yet supported */ | |
| 206 | break; | |
| 207 | case 17: /* Root path */ | |
| 208 | if (NetOurRootPath[0] == 0) { | |
| 209 | size = truncate_sz("Root Path", sizeof(NetOurRootPath), size); | |
| 210 | memcpy(&NetOurRootPath, ext+2, size); | |
| 211 | NetOurRootPath[size] = 0 ; | |
| 212 | } | |
| 213 | break; | |
| 214 | case 18: /* Extension path - Not yet supported */ | |
| 215 | /* | |
| 47cd00fa | 216 | * This can be used to send the information of the |
| 3861aa5c WD |
217 | * vendor area in another file that the client can |
| 218 | * access via TFTP. | |
| 219 | */ | |
| 220 | break; | |
| 221 | /* IP host layer fields */ | |
| 222 | case 40: /* NIS Domain name */ | |
| 223 | if (NetOurNISDomain[0] == 0) { | |
| 224 | size = truncate_sz ("NIS Domain Name", | |
| 225 | sizeof(NetOurNISDomain), | |
| 226 | size); | |
| 227 | memcpy(&NetOurNISDomain, ext+2, size); | |
| 228 | NetOurNISDomain[size] = 0 ; | |
| 229 | } | |
| 230 | break; | |
| 231 | /* Application layer fields */ | |
| 232 | case 43: /* Vendor specific info - Not yet supported */ | |
| 233 | /* | |
| 47cd00fa | 234 | * Binary information to exchange specific |
| 3861aa5c WD |
235 | * product information. |
| 236 | */ | |
| 237 | break; | |
| 238 | /* Reserved (custom) fields (128..254) */ | |
| 239 | } | |
| 240 | } | |
| 241 | ||
| 242 | static void BootpVendorProcess(u8 *ext, int size) | |
| 243 | { | |
| 244 | u8 *end = ext + size ; | |
| 245 | ||
| 246 | debug_ext ("[BOOTP] Checking extension (%d bytes)...\n", size); | |
| 247 | ||
| 248 | while ((ext < end) && (*ext != 0xff)) { | |
| 249 | if (*ext == 0) { | |
| 250 | ext ++ ; | |
| 251 | } else { | |
| 252 | u8 *opt = ext ; | |
| 253 | ext += ext[1] + 2 ; | |
| 254 | if (ext <= end) | |
| 255 | BootpVendorFieldProcess (opt) ; | |
| 256 | } | |
| 257 | } | |
| 258 | ||
| 259 | #ifdef DEBUG_BOOTP_EXT | |
| 260 | printf("[BOOTP] Received fields: \n"); | |
| 261 | if (NetOurSubnetMask) { | |
| 262 | puts ("NetOurSubnetMask : "); | |
| 263 | print_IPaddr (NetOurSubnetMask); | |
| 264 | putc('\n'); | |
| 265 | } | |
| 266 | ||
| 267 | if (NetOurGatewayIP) { | |
| 268 | puts ("NetOurGatewayIP : "); | |
| 269 | print_IPaddr (NetOurGatewayIP); | |
| 270 | putc('\n'); | |
| 271 | } | |
| 272 | ||
| 273 | if (NetBootFileSize) { | |
| 274 | printf("NetBootFileSize : %d\n", NetBootFileSize); | |
| 275 | } | |
| 276 | ||
| 277 | if (NetOurHostName[0]) { | |
| 278 | printf("NetOurHostName : %s\n", NetOurHostName); | |
| 279 | } | |
| 280 | ||
| 281 | if (NetOurRootPath[0]) { | |
| 282 | printf("NetOurRootPath : %s\n", NetOurRootPath); | |
| 283 | } | |
| 284 | ||
| 285 | if (NetOurNISDomain[0]) { | |
| 286 | printf("NetOurNISDomain : %s\n", NetOurNISDomain); | |
| 287 | } | |
| 288 | ||
| 289 | if (NetBootFileSize) { | |
| 290 | printf("NetBootFileSize: %d\n", NetBootFileSize); | |
| 291 | } | |
| 292 | #endif /* DEBUG_BOOTP_EXT */ | |
| 293 | } | |
| 294 | ||
| 295 | /* | |
| 296 | * Handle a BOOTP received packet. | |
| 297 | */ | |
| 298 | static void | |
| 299 | BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) | |
| 300 | { | |
| 301 | Bootp_t *bp; | |
| 302 | char *s; | |
| 303 | ||
| 304 | debug ("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%d)\n", | |
| 305 | src, dest, len, sizeof (Bootp_t)); | |
| 306 | ||
| 307 | bp = (Bootp_t *)pkt; | |
| 308 | ||
| 309 | if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ | |
| 310 | return; | |
| 311 | ||
| 312 | /* | |
| 313 | * Got a good BOOTP reply. Copy the data into our variables. | |
| 314 | */ | |
| 315 | #ifdef CONFIG_STATUS_LED | |
| 316 | status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF); | |
| 317 | #endif | |
| 318 | ||
| 319 | BootpCopyNetParams(bp); /* Store net parameters from reply */ | |
| 320 | ||
| 321 | /* Retrieve extended information (we must parse the vendor area) */ | |
| 322 | if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) | |
| 323 | BootpVendorProcess(&bp->bp_vend[4], len); | |
| 324 | ||
| 325 | NetSetTimeout(0, (thand_f *)0); | |
| 326 | ||
| 327 | debug ("Got good BOOTP\n"); | |
| 328 | ||
| 329 | if (((s = getenv("autoload")) != NULL) && (*s == 'n')) { | |
| 330 | /* | |
| 331 | * Just use BOOTP to configure system; | |
| 332 | * Do not use TFTP to load the bootfile. | |
| 333 | */ | |
| 334 | NetState = NETLOOP_SUCCESS; | |
| 335 | return; | |
| 336 | } | |
| 337 | ||
| 338 | /* Send ARP request to get TFTP server ethernet address. | |
| 339 | * This automagically starts TFTP, too. | |
| 340 | */ | |
| 341 | ArpRequest(); | |
| 342 | } | |
| 343 | #endif /* !CFG_CMD_DHCP */ | |
| 344 | ||
| 345 | /* | |
| 346 | * Timeout on BOOTP/DHCP request. | |
| 347 | */ | |
| 348 | static void | |
| 349 | BootpTimeout(void) | |
| 350 | { | |
| 351 | if (BootpTry >= TIMEOUT_COUNT) { | |
| 352 | puts ("\nRetry count exceeded; starting again\n"); | |
| 353 | NetStartAgain (); | |
| 354 | } else { | |
| 355 | NetSetTimeout (TIMEOUT * CFG_HZ, BootpTimeout); | |
| 356 | BootpRequest (); | |
| 357 | } | |
| 358 | } | |
| 359 | ||
| 360 | /* | |
| 361 | * Initialize BOOTP extension fields in the request. | |
| 362 | */ | |
| 363 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
| 364 | static int DhcpExtended(u8 *e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP) | |
| 365 | { | |
| 366 | u8 *start = e ; | |
| 367 | u8 *cnt; | |
| 368 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX) | |
| 369 | u8 *x; | |
| 370 | #endif | |
| 371 | ||
| 372 | *e++ = 99; /* RFC1048 Magic Cookie */ | |
| 373 | *e++ = 130; | |
| 374 | *e++ = 83; | |
| 375 | *e++ = 99; | |
| 376 | ||
| 377 | *e++ = 53; /* DHCP Message Type */ | |
| 378 | *e++ = 1; | |
| 379 | *e++ = message_type; | |
| 380 | ||
| 381 | *e++ = 57; /* Maximum DHCP Message Size */ | |
| 382 | *e++ = 2; | |
| 383 | *e++ = (576-312+OPT_SIZE) >> 8; | |
| 384 | *e++ = (576-312+OPT_SIZE) & 0xff; | |
| 385 | ||
| 386 | if ( ServerID ) { | |
| 387 | int tmp = ntohl(ServerID); | |
| 388 | ||
| 389 | *e++ = 54; /* ServerID */ | |
| 390 | *e++ = 4; | |
| 391 | *e++ = tmp >> 24; | |
| 392 | *e++ = tmp >> 16; | |
| 393 | *e++ = tmp >> 8; | |
| 394 | *e++ = tmp & 0xff; | |
| 395 | } | |
| 396 | ||
| 397 | if ( RequestedIP ) { | |
| 398 | int tmp = ntohl(RequestedIP); | |
| 399 | ||
| 400 | *e++ = 50; /* Requested IP */ | |
| 401 | *e++ = 4; | |
| 402 | *e++ = tmp >> 24; | |
| 403 | *e++ = tmp >> 16; | |
| 404 | *e++ = tmp >> 8; | |
| 405 | *e++ = tmp & 0xff; | |
| 406 | } | |
| 407 | ||
| 408 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX) | |
| 409 | if ((x = dhcp_vendorex_prep (e))) | |
| 410 | return x - start ; | |
| 411 | #endif | |
| 412 | ||
| 413 | *e++ = 55; /* Parameter Request List */ | |
| 414 | cnt = e++; /* Pointer to count of requested items */ | |
| 415 | *cnt = 0; | |
| 416 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SUBNETMASK) | |
| 417 | *e++ = 1; /* Subnet Mask */ | |
| 418 | *cnt += 1; | |
| 419 | #endif | |
| 420 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY) | |
| 421 | *e++ = 3; /* Router Option */ | |
| 422 | *cnt += 1; | |
| 423 | #endif | |
| 424 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS) | |
| 425 | *e++ = 6; /* DNS Server(s) */ | |
| 426 | *cnt += 1; | |
| 427 | #endif | |
| 428 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME) | |
| 429 | *e++ = 12; /* Hostname */ | |
| 430 | *cnt += 1; | |
| 431 | #endif | |
| 432 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE) | |
| 433 | *e++ = 13; /* Boot File Size */ | |
| 434 | *cnt += 1; | |
| 435 | #endif | |
| 436 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH) | |
| 437 | *e++ = 17; /* Boot path */ | |
| 438 | *cnt += 1; | |
| 439 | #endif | |
| 440 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN) | |
| 441 | *e++ = 40; /* NIS Domain name request */ | |
| 442 | *cnt += 1; | |
| 443 | #endif | |
| 444 | *e++ = 255; /* End of the list */ | |
| 445 | ||
| 446 | /* Pad to minimal length */ | |
| 447 | #ifdef CONFIG_DHCP_MIN_EXT_LEN | |
| 448 | while ((e - start) <= CONFIG_DHCP_MIN_EXT_LEN) | |
| 449 | *e++ = 0; | |
| 450 | #endif | |
| 451 | ||
| 452 | return e - start ; | |
| 453 | } | |
| 454 | ||
| 455 | #else /* CFG_CMD_DHCP */ | |
| 456 | /* | |
| 457 | * Warning: no field size check - change CONFIG_BOOTP_MASK at your own risk! | |
| 458 | */ | |
| 459 | static int BootpExtended (u8 *e) | |
| 460 | { | |
| 461 | u8 *start = e ; | |
| 462 | ||
| 463 | *e++ = 99; /* RFC1048 Magic Cookie */ | |
| 464 | *e++ = 130; | |
| 465 | *e++ = 83; | |
| 466 | *e++ = 99; | |
| 467 | ||
| 468 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
| 469 | *e++ = 53; /* DHCP Message Type */ | |
| 470 | *e++ = 1; | |
| 471 | *e++ = DHCP_DISCOVER; | |
| 472 | ||
| 473 | *e++ = 57; /* Maximum DHCP Message Size */ | |
| 474 | *e++ = 2; | |
| 475 | *e++ = (576-312+OPT_SIZE) >> 16; | |
| 476 | *e++ = (576-312+OPT_SIZE) & 0xff; | |
| 477 | #endif /* CFG_CMD_DHCP */ | |
| 478 | ||
| 479 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SUBNETMASK) | |
| 480 | *e++ = 1; /* Subnet mask request */ | |
| 481 | *e++ = 4; | |
| 482 | e += 4; | |
| 483 | #endif | |
| 484 | ||
| 485 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY) | |
| 486 | *e++ = 3; /* Default gateway request */ | |
| 487 | *e++ = 4; | |
| 488 | e += 4; | |
| 489 | #endif | |
| 490 | ||
| 491 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS) | |
| 492 | *e++ = 6; /* Domain Name Server */ | |
| 493 | *e++ = 4; | |
| 494 | e += 4; | |
| 495 | #endif | |
| 496 | ||
| 497 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME) | |
| 498 | *e++ = 12; /* Host name request */ | |
| 499 | *e++ = 32; | |
| 500 | e += 32; | |
| 501 | #endif | |
| 502 | ||
| 503 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE) | |
| 504 | *e++ = 13; /* Boot file size */ | |
| 505 | *e++ = 2; | |
| 506 | e += 2; | |
| 507 | #endif | |
| 508 | ||
| 509 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH) | |
| 510 | *e++ = 17; /* Boot path */ | |
| 511 | *e++ = 32; | |
| 512 | e += 32; | |
| 513 | #endif | |
| 514 | ||
| 515 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN) | |
| 516 | *e++ = 40; /* NIS Domain name request */ | |
| 517 | *e++ = 32; | |
| 518 | e += 32; | |
| 519 | #endif | |
| 520 | ||
| 521 | *e++ = 255; /* End of the list */ | |
| 522 | ||
| 523 | return e - start ; | |
| 524 | } | |
| 525 | #endif /* CFG_CMD_DHCP */ | |
| 526 | ||
| 527 | void | |
| 528 | BootpRequest (void) | |
| 529 | { | |
| 530 | volatile uchar *pkt, *iphdr; | |
| 531 | Bootp_t *bp; | |
| 532 | int ext_len, pktlen, iplen; | |
| 533 | ||
| 534 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
| 535 | dhcp_state = INIT; | |
| 536 | #endif | |
| 537 | ||
| 538 | #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ | |
| 539 | unsigned char bi_enetaddr[6]; | |
| 540 | int reg; | |
| 541 | char *e,*s; | |
| 542 | uchar tmp[64]; | |
| 543 | ulong tst1, tst2, sum, m_mask, m_value = 0; | |
| 544 | ||
| 545 | if (BootpTry ==0) { | |
| 546 | /* get our mac */ | |
| 547 | reg = getenv_r ("ethaddr", tmp, sizeof(tmp)); | |
| 548 | s = (reg > 0) ? tmp : NULL; | |
| 549 | ||
| 550 | for (reg=0; reg<6; ++reg) { | |
| 551 | bi_enetaddr[reg] = s ? simple_strtoul(s, &e, 16) : 0; | |
| 552 | if (s) { | |
| 553 | s = (*e) ? e+1 : e; | |
| 554 | } | |
| 555 | } | |
| 556 | #ifdef DEBUG | |
| 557 | printf("BootpRequest => Our Mac: "); | |
| 558 | for (reg=0; reg<6; reg++) { | |
| 559 | printf ("%x%c", | |
| 560 | bi_enetaddr[reg], | |
| 561 | reg==5 ? '\n' : ':'); | |
| 562 | } | |
| 563 | #endif /* DEBUG */ | |
| 564 | ||
| 565 | /* Mac-Manipulation 2 get seed1 */ | |
| 566 | tst1=0; | |
| 567 | tst2=0; | |
| 568 | for (reg=2; reg<6; reg++) { | |
| 569 | tst1 = tst1 << 8; | |
| 570 | tst1 = tst1 | bi_enetaddr[reg]; | |
| 571 | } | |
| 572 | for (reg=0; reg<2; reg++) { | |
| 573 | tst2 = tst2 | bi_enetaddr[reg]; | |
| 574 | tst2 = tst2 << 8; | |
| 575 | } | |
| 576 | ||
| 577 | seed1 = tst1^tst2; | |
| 578 | ||
| 579 | /* Mirror seed1*/ | |
| 580 | m_mask=0x1; | |
| 581 | for (reg=1;reg<=32;reg++) { | |
| 582 | m_value |= (m_mask & seed1); | |
| 583 | seed1 = seed1 >> 1; | |
| 584 | m_value = m_value << 1; | |
| 585 | } | |
| 586 | seed1 = m_value; | |
| 587 | seed2 = 0xB78D0945; | |
| 588 | } | |
| 589 | ||
| 590 | /* Random Number Generator */ | |
| 591 | ||
| 592 | for (reg=0;reg<=0;reg++) { | |
| 593 | sum = seed1 + seed2; | |
| 594 | if (sum < seed1 || sum < seed2) | |
| 595 | sum++; | |
| 596 | seed2 = seed1; | |
| 597 | seed1 = sum; | |
| 598 | ||
| 599 | if (BootpTry<=2) { /* Start with max 1024 * 1ms */ | |
| 600 | sum = sum >> (22-BootpTry); | |
| 601 | } else { /*After 3rd BOOTP request max 8192 * 1ms */ | |
| 602 | sum = sum >> 19; | |
| 603 | } | |
| 604 | } | |
| 605 | ||
| 606 | printf ("Random delay: %ld ms...\n", sum); | |
| 607 | for (reg=0; reg <sum; reg++) { | |
| 608 | udelay(1000); /*Wait 1ms*/ | |
| 609 | } | |
| 610 | #endif /* CONFIG_BOOTP_RANDOM_DELAY */ | |
| 611 | ||
| 612 | printf("BOOTP broadcast %d\n", ++BootpTry); | |
| 613 | pkt = NetTxPacket; | |
| 614 | memset ((void*)pkt, 0, PKTSIZE); | |
| 615 | ||
| 616 | NetSetEther(pkt, NetBcastAddr, PROT_IP); | |
| 617 | pkt += ETHER_HDR_SIZE; | |
| 618 | ||
| 619 | /* | |
| 620 | * Next line results in incorrect packet size being transmitted, resulting | |
| 621 | * in errors in some DHCP servers, reporting missing bytes. Size must be | |
| 622 | * set in packet header after extension length has been determined. | |
| 623 | * C. Hallinan, DS4.COM, Inc. | |
| 624 | */ | |
| 625 | /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */ | |
| 626 | iphdr = pkt; /* We need this later for NetSetIP() */ | |
| 627 | pkt += IP_HDR_SIZE; | |
| 628 | ||
| 629 | bp = (Bootp_t *)pkt; | |
| 630 | bp->bp_op = OP_BOOTREQUEST; | |
| 631 | bp->bp_htype = HWT_ETHER; | |
| 632 | bp->bp_hlen = HWL_ETHER; | |
| 633 | bp->bp_hops = 0; | |
| 634 | bp->bp_secs = htons(get_timer(0) / CFG_HZ); | |
| 635 | NetWriteIP(&bp->bp_ciaddr, 0); | |
| 636 | NetWriteIP(&bp->bp_yiaddr, 0); | |
| 637 | NetWriteIP(&bp->bp_siaddr, 0); | |
| 638 | NetWriteIP(&bp->bp_giaddr, 0); | |
| 639 | memcpy (bp->bp_chaddr, NetOurEther, 6); | |
| 640 | copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file)); | |
| 641 | ||
| 642 | /* Request additional information from the BOOTP/DHCP server */ | |
| 643 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
| 644 | ext_len = DhcpExtended(bp->bp_vend, DHCP_DISCOVER, 0, 0); | |
| 645 | #else | |
| 646 | ext_len = BootpExtended(bp->bp_vend); | |
| 647 | #endif /* CFG_CMD_DHCP */ | |
| 648 | ||
| 649 | /* | |
| 650 | * Bootp ID is the lower 4 bytes of our ethernet address | |
| 651 | * plus the current time in HZ. | |
| 652 | */ | |
| 653 | BootpID = ((ulong)NetOurEther[2] << 24) | |
| 654 | | ((ulong)NetOurEther[3] << 16) | |
| 655 | | ((ulong)NetOurEther[4] << 8) | |
| 656 | | (ulong)NetOurEther[5]; | |
| 657 | BootpID += get_timer(0); | |
| 658 | BootpID = htonl(BootpID); | |
| 659 | NetCopyLong(&bp->bp_id, &BootpID); | |
| 660 | ||
| 661 | /* | |
| 662 | * Calculate proper packet lengths taking into account the | |
| 663 | * variable size of the options field | |
| 664 | */ | |
| 665 | pktlen = BOOTP_SIZE - sizeof(bp->bp_vend) + ext_len; | |
| 666 | iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; | |
| 667 | NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); | |
| 668 | NetSetTimeout(SELECT_TIMEOUT * CFG_HZ, BootpTimeout); | |
| 669 | ||
| 670 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
| 671 | dhcp_state = SELECTING; | |
| 672 | NetSetHandler(DhcpHandler); | |
| 673 | #else | |
| 674 | NetSetHandler(BootpHandler); | |
| 675 | #endif /* CFG_CMD_DHCP */ | |
| 676 | NetSendPacket(NetTxPacket, pktlen); | |
| 677 | } | |
| 678 | ||
| 679 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
| 3e38691e | 680 | static void DhcpOptionsProcess(uchar *popt) |
| 3861aa5c | 681 | { |
| 3e38691e | 682 | uchar *end = popt + BOOTP_HDR_SIZE; |
| 3861aa5c WD |
683 | int oplen, size; |
| 684 | ||
| 685 | while ( popt < end && *popt != 0xff ) { | |
| 686 | oplen = *(popt + 1); | |
| 687 | switch(*popt) { | |
| 688 | case 1: | |
| 689 | NetCopyIP(&NetOurSubnetMask, (popt+2)); | |
| 690 | break; | |
| 691 | case 3: | |
| 692 | NetCopyIP(&NetOurGatewayIP, (popt+2)); | |
| 693 | break; | |
| 694 | case 6: | |
| 695 | NetCopyIP(&NetOurDNSIP, (popt+2)); | |
| 696 | break; | |
| 697 | case 12: | |
| 698 | size = truncate_sz ("Host Name", | |
| 699 | sizeof(NetOurHostName), | |
| 700 | oplen); | |
| 701 | memcpy(&NetOurHostName, popt+2, size); | |
| 702 | NetOurHostName[size] = 0 ; | |
| 703 | break; | |
| 704 | case 15: /* Ignore Domain Name Option */ | |
| 705 | break; | |
| 706 | case 17: | |
| 707 | size = truncate_sz ("Root Path", | |
| 708 | sizeof(NetOurRootPath), | |
| 709 | oplen); | |
| 710 | memcpy(&NetOurRootPath, popt+2, size); | |
| 711 | NetOurRootPath[size] = 0 ; | |
| 712 | break; | |
| 713 | case 51: | |
| 714 | dhcp_leasetime = *(unsigned int *)(popt + 2); | |
| 715 | break; | |
| 716 | case 53: /* Ignore Message Type Option */ | |
| 717 | break; | |
| 718 | case 54: | |
| 719 | NetCopyIP(&NetServerIP, (popt+2)); | |
| 720 | break; | |
| 721 | case 58: /* Ignore Renewal Time Option */ | |
| 722 | break; | |
| 723 | case 59: /* Ignore Rebinding Time Option */ | |
| 724 | break; | |
| 725 | default: | |
| 726 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX) | |
| 727 | if (dhcp_vendorex_proc(popt)) | |
| 728 | break; | |
| 729 | #endif | |
| 730 | printf("*** Unhandled DHCP Option in OFFER/ACK: %d\n", | |
| 731 | *popt); | |
| 732 | break; | |
| 733 | } | |
| 734 | popt += oplen + 2; /* Process next option */ | |
| 735 | } | |
| 736 | } | |
| 737 | ||
| 738 | static int DhcpMessageType(unsigned char *popt) | |
| 739 | { | |
| 740 | if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC)) | |
| 741 | return -1; | |
| 742 | ||
| 743 | popt += 4; | |
| 744 | while ( *popt != 0xff ) { | |
| 745 | if ( *popt == 53 ) /* DHCP Message Type */ | |
| 746 | return *(popt + 2); | |
| 747 | popt += *(popt + 1) + 2; /* Scan through all options */ | |
| 748 | } | |
| 749 | return -1; | |
| 750 | } | |
| 751 | ||
| 3e38691e | 752 | static void DhcpSendRequestPkt(Bootp_t *bp_offer) |
| 3861aa5c WD |
753 | { |
| 754 | volatile uchar *pkt, *iphdr; | |
| 755 | Bootp_t *bp; | |
| 756 | int pktlen, iplen, extlen; | |
| 47cd00fa | 757 | IPaddr_t OfferedIP; |
| 3861aa5c WD |
758 | |
| 759 | debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n"); | |
| 760 | pkt = NetTxPacket; | |
| 761 | memset ((void*)pkt, 0, PKTSIZE); | |
| 762 | ||
| 763 | NetSetEther(pkt, NetBcastAddr, PROT_IP); | |
| 764 | pkt += ETHER_HDR_SIZE; | |
| 765 | ||
| 766 | iphdr = pkt; /* We'll need this later to set proper pkt size */ | |
| 767 | pkt += IP_HDR_SIZE; | |
| 768 | ||
| 769 | bp = (Bootp_t *)pkt; | |
| 770 | bp->bp_op = OP_BOOTREQUEST; | |
| 771 | bp->bp_htype = HWT_ETHER; | |
| 772 | bp->bp_hlen = HWL_ETHER; | |
| 773 | bp->bp_hops = 0; | |
| 774 | bp->bp_secs = htons(get_timer(0) / CFG_HZ); | |
| 775 | NetCopyIP(&bp->bp_ciaddr, &bp_offer->bp_ciaddr); /* both in network byte order */ | |
| 776 | NetCopyIP(&bp->bp_yiaddr, &bp_offer->bp_yiaddr); | |
| 777 | NetCopyIP(&bp->bp_siaddr, &bp_offer->bp_siaddr); | |
| 778 | NetCopyIP(&bp->bp_giaddr, &bp_offer->bp_giaddr); | |
| 779 | memcpy (bp->bp_chaddr, NetOurEther, 6); | |
| 780 | ||
| 781 | /* | |
| 782 | * ID is the id of the OFFER packet | |
| 783 | */ | |
| 784 | ||
| 785 | NetCopyLong(&bp->bp_id, &bp_offer->bp_id); | |
| 786 | ||
| 787 | /* | |
| 788 | * Copy options from OFFER packet if present | |
| 789 | */ | |
| 47cd00fa WD |
790 | NetCopyIP(&OfferedIP, &bp->bp_yiaddr); |
| 791 | extlen = DhcpExtended(bp->bp_vend, DHCP_REQUEST, NetServerIP, OfferedIP); | |
| 3861aa5c WD |
792 | |
| 793 | pktlen = BOOTP_SIZE - sizeof(bp->bp_vend) + extlen; | |
| 794 | iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; | |
| 795 | NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); | |
| 796 | ||
| 797 | debug ("Transmitting DHCPREQUEST packet: len = %d\n", pktlen); | |
| 798 | NetSendPacket(NetTxPacket, pktlen); | |
| 799 | } | |
| 800 | ||
| 801 | /* | |
| 802 | * Handle DHCP received packets. | |
| 803 | */ | |
| 804 | static void | |
| 805 | DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) | |
| 806 | { | |
| 807 | Bootp_t *bp = (Bootp_t *)pkt; | |
| 808 | ||
| 809 | debug ("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n", | |
| 810 | src, dest, len, dhcp_state); | |
| 811 | ||
| 812 | if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ | |
| 813 | return; | |
| 814 | ||
| 815 | debug ("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n", | |
| 816 | src, dest, len, dhcp_state); | |
| 817 | ||
| 818 | switch (dhcp_state) { | |
| 819 | case SELECTING: | |
| 820 | /* | |
| 821 | * Wait an appropriate time for any potential DHCPOFFER packets | |
| 822 | * to arrive. Then select one, and generate DHCPREQUEST response. | |
| 823 | * If filename is in format we recognize, assume it is a valid | |
| 824 | * OFFER from a server we want. | |
| 825 | */ | |
| 826 | debug ("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file); | |
| 827 | #ifdef CFG_BOOTFILE_PREFIX | |
| 828 | if (strncmp(bp->bp_file, | |
| 829 | CFG_BOOTFILE_PREFIX, | |
| 830 | strlen(CFG_BOOTFILE_PREFIX)) == 0 ) { | |
| 831 | #endif /* CFG_BOOTFILE_PREFIX */ | |
| 832 | ||
| 833 | debug ("TRANSITIONING TO REQUESTING STATE\n"); | |
| 834 | dhcp_state = REQUESTING; | |
| 835 | #if 0 | |
| 836 | if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) | |
| 837 | DhcpOptionsProcess(&bp->bp_vend[4]); | |
| 838 | ||
| 839 | #endif | |
| 840 | BootpCopyNetParams(bp); /* Store net params from reply */ | |
| 841 | ||
| 842 | NetSetTimeout(TIMEOUT * CFG_HZ, BootpTimeout); | |
| 843 | DhcpSendRequestPkt(bp); | |
| 844 | #ifdef CFG_BOOTFILE_PREFIX | |
| 845 | } | |
| 846 | #endif /* CFG_BOOTFILE_PREFIX */ | |
| 847 | ||
| 848 | return; | |
| 849 | break; | |
| 850 | case REQUESTING: | |
| 851 | debug ("DHCP State: REQUESTING\n"); | |
| 852 | ||
| 853 | if ( DhcpMessageType(bp->bp_vend) == DHCP_ACK ) { | |
| 854 | char *s; | |
| 855 | ||
| 856 | if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) | |
| 857 | DhcpOptionsProcess(&bp->bp_vend[4]); | |
| 858 | BootpCopyNetParams(bp); /* Store net params from reply */ | |
| 859 | dhcp_state = BOUND; | |
| 860 | printf("DHCP client bound to address "); | |
| 861 | print_IPaddr(NetOurIP); | |
| 862 | printf("\n"); | |
| 863 | ||
| 864 | /* Obey the 'autoload' setting */ | |
| 865 | if (((s = getenv("autoload")) != NULL) && (*s == 'n')) { | |
| 866 | NetState = NETLOOP_SUCCESS; | |
| 867 | return; | |
| 868 | } | |
| 869 | /* Send ARP request to get TFTP server ethernet address. | |
| 870 | * This automagically starts TFTP, too. | |
| 871 | */ | |
| 872 | ArpRequest(); | |
| 873 | return; | |
| 874 | } | |
| 875 | break; | |
| 876 | default: | |
| 877 | printf("DHCP: INVALID STATE\n"); | |
| 878 | break; | |
| 879 | } | |
| 880 | ||
| 881 | } | |
| 882 | ||
| 883 | void DhcpRequest(void) | |
| 884 | { | |
| 885 | BootpRequest(); | |
| 886 | } | |
| 887 | #endif /* CFG_CMD_DHCP */ | |
| 888 | ||
| 889 | #endif /* CFG_CMD_NET */ |