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 2000-2004 Wolfgang Denk, wd@denx.de 9 */ 10 11 #include <common.h> 12 #include <command.h> 13 #include <net.h> 14 #include "bootp.h" 15 #include "tftp.h" 16 #include "nfs.h" 17 #ifdef CONFIG_STATUS_LED 18 #include <status_led.h> 19 #endif 20 21 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */ 22 23 #if defined(CONFIG_CMD_NET) 24 25 #define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */ 26 #ifndef CONFIG_NET_RETRY_COUNT 27 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 28 #else 29 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) 30 #endif 31 32 #define PORT_BOOTPS 67 /* BOOTP server UDP port */ 33 #define PORT_BOOTPC 68 /* BOOTP client UDP port */ 34 35 #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */ 36 #define CONFIG_DHCP_MIN_EXT_LEN 64 37 #endif 38 39 ulong BootpID; 40 int BootpTry; 41 #ifdef CONFIG_BOOTP_RANDOM_DELAY 42 ulong seed1, seed2; 43 #endif 44 45 #if defined(CONFIG_CMD_DHCP) 46 dhcp_state_t dhcp_state = INIT; 47 unsigned long dhcp_leasetime = 0; 48 IPaddr_t NetDHCPServerIP = 0; 49 static void DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len); 50 51 /* For Debug */ 52 #if 0 53 static char *dhcpmsg2str(int type) 54 { 55 switch (type) { 56 case 1: return "DHCPDISCOVER"; break; 57 case 2: return "DHCPOFFER"; break; 58 case 3: return "DHCPREQUEST"; break; 59 case 4: return "DHCPDECLINE"; break; 60 case 5: return "DHCPACK"; break; 61 case 6: return "DHCPNACK"; break; 62 case 7: return "DHCPRELEASE"; break; 63 default: return "UNKNOWN/INVALID MSG TYPE"; break; 64 } 65 } 66 #endif 67 68 #if defined(CONFIG_BOOTP_VENDOREX) 69 extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e after add own opts. */ 70 extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL */ 71 #endif 72 73 #endif 74 75 static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len) 76 { 77 Bootp_t *bp = (Bootp_t *) pkt; 78 int retval = 0; 79 80 if (dest != PORT_BOOTPC || src != PORT_BOOTPS) 81 retval = -1; 82 else if (len < sizeof (Bootp_t) - OPT_SIZE) 83 retval = -2; 84 else if (bp->bp_op != OP_BOOTREQUEST && 85 bp->bp_op != OP_BOOTREPLY && 86 bp->bp_op != DHCP_OFFER && 87 bp->bp_op != DHCP_ACK && 88 bp->bp_op != DHCP_NAK ) { 89 retval = -3; 90 } 91 else if (bp->bp_htype != HWT_ETHER) 92 retval = -4; 93 else if (bp->bp_hlen != HWL_ETHER) 94 retval = -5; 95 else if (NetReadLong((ulong*)&bp->bp_id) != BootpID) { 96 retval = -6; 97 } 98 99 debug("Filtering pkt = %d\n", retval); 100 101 return retval; 102 } 103 104 /* 105 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet 106 */ 107 static void BootpCopyNetParams(Bootp_t *bp) 108 { 109 IPaddr_t tmp_ip; 110 111 NetCopyIP(&NetOurIP, &bp->bp_yiaddr); 112 #if !defined(CONFIG_BOOTP_SERVERIP) 113 NetCopyIP(&tmp_ip, &bp->bp_siaddr); 114 if (tmp_ip != 0) 115 NetCopyIP(&NetServerIP, &bp->bp_siaddr); 116 memcpy (NetServerEther, ((Ethernet_t *)NetRxPacket)->et_src, 6); 117 #endif 118 if (strlen(bp->bp_file) > 0) 119 copy_filename (BootFile, bp->bp_file, sizeof(BootFile)); 120 121 debug("Bootfile: %s\n", BootFile); 122 123 /* Propagate to environment: 124 * don't delete exising entry when BOOTP / DHCP reply does 125 * not contain a new value 126 */ 127 if (*BootFile) { 128 setenv ("bootfile", BootFile); 129 } 130 } 131 132 static int truncate_sz (const char *name, int maxlen, int curlen) 133 { 134 if (curlen >= maxlen) { 135 printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n", 136 name, curlen, maxlen); 137 curlen = maxlen - 1; 138 } 139 return (curlen); 140 } 141 142 #if !defined(CONFIG_CMD_DHCP) 143 144 static void BootpVendorFieldProcess (u8 * ext) 145 { 146 int size = *(ext + 1); 147 148 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext, 149 *(ext + 1)); 150 151 NetBootFileSize = 0; 152 153 switch (*ext) { 154 /* Fixed length fields */ 155 case 1: /* Subnet mask */ 156 if (NetOurSubnetMask == 0) 157 NetCopyIP (&NetOurSubnetMask, (IPaddr_t *) (ext + 2)); 158 break; 159 case 2: /* Time offset - Not yet supported */ 160 break; 161 /* Variable length fields */ 162 case 3: /* Gateways list */ 163 if (NetOurGatewayIP == 0) { 164 NetCopyIP (&NetOurGatewayIP, (IPaddr_t *) (ext + 2)); 165 } 166 break; 167 case 4: /* Time server - Not yet supported */ 168 break; 169 case 5: /* IEN-116 name server - Not yet supported */ 170 break; 171 case 6: 172 if (NetOurDNSIP == 0) { 173 NetCopyIP (&NetOurDNSIP, (IPaddr_t *) (ext + 2)); 174 } 175 #if defined(CONFIG_BOOTP_DNS2) 176 if ((NetOurDNS2IP == 0) && (size > 4)) { 177 NetCopyIP (&NetOurDNS2IP, (IPaddr_t *) (ext + 2 + 4)); 178 } 179 #endif 180 break; 181 case 7: /* Log server - Not yet supported */ 182 break; 183 case 8: /* Cookie/Quote server - Not yet supported */ 184 break; 185 case 9: /* LPR server - Not yet supported */ 186 break; 187 case 10: /* Impress server - Not yet supported */ 188 break; 189 case 11: /* RPL server - Not yet supported */ 190 break; 191 case 12: /* Host name */ 192 if (NetOurHostName[0] == 0) { 193 size = truncate_sz ("Host Name", sizeof (NetOurHostName), size); 194 memcpy (&NetOurHostName, ext + 2, size); 195 NetOurHostName[size] = 0; 196 } 197 break; 198 case 13: /* Boot file size */ 199 if (size == 2) 200 NetBootFileSize = ntohs (*(ushort *) (ext + 2)); 201 else if (size == 4) 202 NetBootFileSize = ntohl (*(ulong *) (ext + 2)); 203 break; 204 case 14: /* Merit dump file - Not yet supported */ 205 break; 206 case 15: /* Domain name - Not yet supported */ 207 break; 208 case 16: /* Swap server - Not yet supported */ 209 break; 210 case 17: /* Root path */ 211 if (NetOurRootPath[0] == 0) { 212 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), size); 213 memcpy (&NetOurRootPath, ext + 2, size); 214 NetOurRootPath[size] = 0; 215 } 216 break; 217 case 18: /* Extension path - Not yet supported */ 218 /* 219 * This can be used to send the information of the 220 * vendor area in another file that the client can 221 * access via TFTP. 222 */ 223 break; 224 /* IP host layer fields */ 225 case 40: /* NIS Domain name */ 226 if (NetOurNISDomain[0] == 0) { 227 size = truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain), size); 228 memcpy (&NetOurNISDomain, ext + 2, size); 229 NetOurNISDomain[size] = 0; 230 } 231 break; 232 /* Application layer fields */ 233 case 43: /* Vendor specific info - Not yet supported */ 234 /* 235 * Binary information to exchange specific 236 * product information. 237 */ 238 break; 239 /* Reserved (custom) fields (128..254) */ 240 } 241 } 242 243 static void BootpVendorProcess (u8 * ext, int size) 244 { 245 u8 *end = ext + size; 246 247 debug("[BOOTP] Checking extension (%d bytes)...\n", size); 248 249 while ((ext < end) && (*ext != 0xff)) { 250 if (*ext == 0) { 251 ext++; 252 } else { 253 u8 *opt = ext; 254 255 ext += ext[1] + 2; 256 if (ext <= end) 257 BootpVendorFieldProcess (opt); 258 } 259 } 260 261 debug("[BOOTP] Received fields: \n"); 262 if (NetOurSubnetMask) 263 debug("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask); 264 265 if (NetOurGatewayIP) 266 debug("NetOurGatewayIP : %pI4", &NetOurGatewayIP); 267 268 if (NetBootFileSize) 269 debug("NetBootFileSize : %d\n", NetBootFileSize); 270 271 if (NetOurHostName[0]) 272 debug("NetOurHostName : %s\n", NetOurHostName); 273 274 if (NetOurRootPath[0]) 275 debug("NetOurRootPath : %s\n", NetOurRootPath); 276 277 if (NetOurNISDomain[0]) 278 debug("NetOurNISDomain : %s\n", NetOurNISDomain); 279 280 if (NetBootFileSize) 281 debug("NetBootFileSize: %d\n", NetBootFileSize); 282 } 283 /* 284 * Handle a BOOTP received packet. 285 */ 286 static void 287 BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 288 { 289 Bootp_t *bp; 290 char *s; 291 292 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n", 293 src, dest, len, sizeof (Bootp_t)); 294 295 bp = (Bootp_t *)pkt; 296 297 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ 298 return; 299 300 /* 301 * Got a good BOOTP reply. Copy the data into our variables. 302 */ 303 #ifdef CONFIG_STATUS_LED 304 status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF); 305 #endif 306 307 BootpCopyNetParams(bp); /* Store net parameters from reply */ 308 309 /* Retrieve extended information (we must parse the vendor area) */ 310 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 311 BootpVendorProcess((uchar *)&bp->bp_vend[4], len); 312 313 NetSetTimeout(0, (thand_f *)0); 314 315 debug("Got good BOOTP\n"); 316 317 if ((s = getenv("autoload")) != NULL) { 318 if (*s == 'n') { 319 /* 320 * Just use BOOTP to configure system; 321 * Do not use TFTP to load the bootfile. 322 */ 323 NetState = NETLOOP_SUCCESS; 324 return; 325 #if defined(CONFIG_CMD_NFS) 326 } else if (strcmp(s, "NFS") == 0) { 327 /* 328 * Use NFS to load the bootfile. 329 */ 330 NfsStart(); 331 return; 332 #endif 333 } 334 } 335 336 TftpStart(); 337 } 338 #endif 339 340 /* 341 * Timeout on BOOTP/DHCP request. 342 */ 343 static void 344 BootpTimeout(void) 345 { 346 if (BootpTry >= TIMEOUT_COUNT) { 347 puts ("\nRetry count exceeded; starting again\n"); 348 NetStartAgain (); 349 } else { 350 NetSetTimeout (TIMEOUT, BootpTimeout); 351 BootpRequest (); 352 } 353 } 354 355 /* 356 * Initialize BOOTP extension fields in the request. 357 */ 358 #if defined(CONFIG_CMD_DHCP) 359 static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP) 360 { 361 u8 *start = e; 362 u8 *cnt; 363 364 #if defined(CONFIG_BOOTP_VENDOREX) 365 u8 *x; 366 #endif 367 #if defined(CONFIG_BOOTP_SEND_HOSTNAME) 368 char *hostname; 369 #endif 370 371 *e++ = 99; /* RFC1048 Magic Cookie */ 372 *e++ = 130; 373 *e++ = 83; 374 *e++ = 99; 375 376 *e++ = 53; /* DHCP Message Type */ 377 *e++ = 1; 378 *e++ = message_type; 379 380 *e++ = 57; /* Maximum DHCP Message Size */ 381 *e++ = 2; 382 *e++ = (576 - 312 + OPT_SIZE) >> 8; 383 *e++ = (576 - 312 + OPT_SIZE) & 0xff; 384 385 if (ServerID) { 386 int tmp = ntohl (ServerID); 387 388 *e++ = 54; /* ServerID */ 389 *e++ = 4; 390 *e++ = tmp >> 24; 391 *e++ = tmp >> 16; 392 *e++ = tmp >> 8; 393 *e++ = tmp & 0xff; 394 } 395 396 if (RequestedIP) { 397 int tmp = ntohl (RequestedIP); 398 399 *e++ = 50; /* Requested IP */ 400 *e++ = 4; 401 *e++ = tmp >> 24; 402 *e++ = tmp >> 16; 403 *e++ = tmp >> 8; 404 *e++ = tmp & 0xff; 405 } 406 #if defined(CONFIG_BOOTP_SEND_HOSTNAME) 407 if ((hostname = getenv ("hostname"))) { 408 int hostnamelen = strlen (hostname); 409 410 *e++ = 12; /* Hostname */ 411 *e++ = hostnamelen; 412 memcpy (e, hostname, hostnamelen); 413 e += hostnamelen; 414 } 415 #endif 416 417 #if defined(CONFIG_BOOTP_VENDOREX) 418 if ((x = dhcp_vendorex_prep (e))) 419 return x - start; 420 #endif 421 422 *e++ = 55; /* Parameter Request List */ 423 cnt = e++; /* Pointer to count of requested items */ 424 *cnt = 0; 425 #if defined(CONFIG_BOOTP_SUBNETMASK) 426 *e++ = 1; /* Subnet Mask */ 427 *cnt += 1; 428 #endif 429 #if defined(CONFIG_BOOTP_TIMEOFFSET) 430 *e++ = 2; 431 *cnt += 1; 432 #endif 433 #if defined(CONFIG_BOOTP_GATEWAY) 434 *e++ = 3; /* Router Option */ 435 *cnt += 1; 436 #endif 437 #if defined(CONFIG_BOOTP_DNS) 438 *e++ = 6; /* DNS Server(s) */ 439 *cnt += 1; 440 #endif 441 #if defined(CONFIG_BOOTP_HOSTNAME) 442 *e++ = 12; /* Hostname */ 443 *cnt += 1; 444 #endif 445 #if defined(CONFIG_BOOTP_BOOTFILESIZE) 446 *e++ = 13; /* Boot File Size */ 447 *cnt += 1; 448 #endif 449 #if defined(CONFIG_BOOTP_BOOTPATH) 450 *e++ = 17; /* Boot path */ 451 *cnt += 1; 452 #endif 453 #if defined(CONFIG_BOOTP_NISDOMAIN) 454 *e++ = 40; /* NIS Domain name request */ 455 *cnt += 1; 456 #endif 457 #if defined(CONFIG_BOOTP_NTPSERVER) 458 *e++ = 42; 459 *cnt += 1; 460 #endif 461 *e++ = 255; /* End of the list */ 462 463 /* Pad to minimal length */ 464 #ifdef CONFIG_DHCP_MIN_EXT_LEN 465 while ((e - start) <= CONFIG_DHCP_MIN_EXT_LEN) 466 *e++ = 0; 467 #endif 468 469 return e - start; 470 } 471 472 #else 473 /* 474 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk! 475 */ 476 static int BootpExtended (u8 * e) 477 { 478 u8 *start = e; 479 480 *e++ = 99; /* RFC1048 Magic Cookie */ 481 *e++ = 130; 482 *e++ = 83; 483 *e++ = 99; 484 485 #if defined(CONFIG_CMD_DHCP) 486 *e++ = 53; /* DHCP Message Type */ 487 *e++ = 1; 488 *e++ = DHCP_DISCOVER; 489 490 *e++ = 57; /* Maximum DHCP Message Size */ 491 *e++ = 2; 492 *e++ = (576 - 312 + OPT_SIZE) >> 16; 493 *e++ = (576 - 312 + OPT_SIZE) & 0xff; 494 #endif 495 496 #if defined(CONFIG_BOOTP_SUBNETMASK) 497 *e++ = 1; /* Subnet mask request */ 498 *e++ = 4; 499 e += 4; 500 #endif 501 502 #if defined(CONFIG_BOOTP_GATEWAY) 503 *e++ = 3; /* Default gateway request */ 504 *e++ = 4; 505 e += 4; 506 #endif 507 508 #if defined(CONFIG_BOOTP_DNS) 509 *e++ = 6; /* Domain Name Server */ 510 *e++ = 4; 511 e += 4; 512 #endif 513 514 #if defined(CONFIG_BOOTP_HOSTNAME) 515 *e++ = 12; /* Host name request */ 516 *e++ = 32; 517 e += 32; 518 #endif 519 520 #if defined(CONFIG_BOOTP_BOOTFILESIZE) 521 *e++ = 13; /* Boot file size */ 522 *e++ = 2; 523 e += 2; 524 #endif 525 526 #if defined(CONFIG_BOOTP_BOOTPATH) 527 *e++ = 17; /* Boot path */ 528 *e++ = 32; 529 e += 32; 530 #endif 531 532 #if defined(CONFIG_BOOTP_NISDOMAIN) 533 *e++ = 40; /* NIS Domain name request */ 534 *e++ = 32; 535 e += 32; 536 #endif 537 538 *e++ = 255; /* End of the list */ 539 540 return e - start; 541 } 542 #endif 543 544 void 545 BootpRequest (void) 546 { 547 volatile uchar *pkt, *iphdr; 548 Bootp_t *bp; 549 int ext_len, pktlen, iplen; 550 551 #if defined(CONFIG_CMD_DHCP) 552 dhcp_state = INIT; 553 #endif 554 555 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ 556 unsigned char bi_enetaddr[6]; 557 int reg; 558 ulong tst1, tst2, sum, m_mask, m_value = 0; 559 560 if (BootpTry ==0) { 561 /* get our mac */ 562 eth_getenv_enetaddr("ethaddr", bi_enetaddr); 563 564 debug("BootpRequest => Our Mac: "); 565 for (reg=0; reg<6; reg++) 566 debug("%x%c", bi_enetaddr[reg], reg==5 ? '\n' : ':'); 567 568 /* Mac-Manipulation 2 get seed1 */ 569 tst1=0; 570 tst2=0; 571 for (reg=2; reg<6; reg++) { 572 tst1 = tst1 << 8; 573 tst1 = tst1 | bi_enetaddr[reg]; 574 } 575 for (reg=0; reg<2; reg++) { 576 tst2 = tst2 | bi_enetaddr[reg]; 577 tst2 = tst2 << 8; 578 } 579 580 seed1 = tst1^tst2; 581 582 /* Mirror seed1*/ 583 m_mask=0x1; 584 for (reg=1;reg<=32;reg++) { 585 m_value |= (m_mask & seed1); 586 seed1 = seed1 >> 1; 587 m_value = m_value << 1; 588 } 589 seed1 = m_value; 590 seed2 = 0xB78D0945; 591 } 592 593 /* Random Number Generator */ 594 595 for (reg=0;reg<=0;reg++) { 596 sum = seed1 + seed2; 597 if (sum < seed1 || sum < seed2) 598 sum++; 599 seed2 = seed1; 600 seed1 = sum; 601 602 if (BootpTry<=2) { /* Start with max 1024 * 1ms */ 603 sum = sum >> (22-BootpTry); 604 } else { /*After 3rd BOOTP request max 8192 * 1ms */ 605 sum = sum >> 19; 606 } 607 } 608 609 printf ("Random delay: %ld ms...\n", sum); 610 for (reg=0; reg <sum; reg++) { 611 udelay(1000); /*Wait 1ms*/ 612 } 613 #endif /* CONFIG_BOOTP_RANDOM_DELAY */ 614 615 printf("BOOTP broadcast %d\n", ++BootpTry); 616 pkt = NetTxPacket; 617 memset ((void*)pkt, 0, PKTSIZE); 618 619 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); 620 621 /* 622 * Next line results in incorrect packet size being transmitted, resulting 623 * in errors in some DHCP servers, reporting missing bytes. Size must be 624 * set in packet header after extension length has been determined. 625 * C. Hallinan, DS4.COM, Inc. 626 */ 627 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */ 628 iphdr = pkt; /* We need this later for NetSetIP() */ 629 pkt += IP_HDR_SIZE; 630 631 bp = (Bootp_t *)pkt; 632 bp->bp_op = OP_BOOTREQUEST; 633 bp->bp_htype = HWT_ETHER; 634 bp->bp_hlen = HWL_ETHER; 635 bp->bp_hops = 0; 636 bp->bp_secs = htons(get_timer(0) / 1000); 637 NetWriteIP(&bp->bp_ciaddr, 0); 638 NetWriteIP(&bp->bp_yiaddr, 0); 639 NetWriteIP(&bp->bp_siaddr, 0); 640 NetWriteIP(&bp->bp_giaddr, 0); 641 memcpy (bp->bp_chaddr, NetOurEther, 6); 642 copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file)); 643 644 /* Request additional information from the BOOTP/DHCP server */ 645 #if defined(CONFIG_CMD_DHCP) 646 ext_len = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0); 647 #else 648 ext_len = BootpExtended((u8 *)bp->bp_vend); 649 #endif 650 651 /* 652 * Bootp ID is the lower 4 bytes of our ethernet address 653 * plus the current time in ms. 654 */ 655 BootpID = ((ulong)NetOurEther[2] << 24) 656 | ((ulong)NetOurEther[3] << 16) 657 | ((ulong)NetOurEther[4] << 8) 658 | (ulong)NetOurEther[5]; 659 BootpID += get_timer(0); 660 BootpID = htonl(BootpID); 661 NetCopyLong(&bp->bp_id, &BootpID); 662 663 /* 664 * Calculate proper packet lengths taking into account the 665 * variable size of the options field 666 */ 667 pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; 668 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; 669 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); 670 NetSetTimeout(SELECT_TIMEOUT, BootpTimeout); 671 672 #if defined(CONFIG_CMD_DHCP) 673 dhcp_state = SELECTING; 674 NetSetHandler(DhcpHandler); 675 #else 676 NetSetHandler(BootpHandler); 677 #endif 678 NetSendPacket(NetTxPacket, pktlen); 679 } 680 681 #if defined(CONFIG_CMD_DHCP) 682 static void DhcpOptionsProcess (uchar * popt, Bootp_t *bp) 683 { 684 uchar *end = popt + BOOTP_HDR_SIZE; 685 int oplen, size; 686 687 while (popt < end && *popt != 0xff) { 688 oplen = *(popt + 1); 689 switch (*popt) { 690 case 1: 691 NetCopyIP (&NetOurSubnetMask, (popt + 2)); 692 break; 693 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) 694 case 2: /* Time offset */ 695 NetCopyLong ((ulong *)&NetTimeOffset, (ulong *) (popt + 2)); 696 NetTimeOffset = ntohl (NetTimeOffset); 697 break; 698 #endif 699 case 3: 700 NetCopyIP (&NetOurGatewayIP, (popt + 2)); 701 break; 702 case 6: 703 NetCopyIP (&NetOurDNSIP, (popt + 2)); 704 #if defined(CONFIG_BOOTP_DNS2) 705 if (*(popt + 1) > 4) { 706 NetCopyIP (&NetOurDNS2IP, (popt + 2 + 4)); 707 } 708 #endif 709 break; 710 case 12: 711 size = truncate_sz ("Host Name", sizeof (NetOurHostName), oplen); 712 memcpy (&NetOurHostName, popt + 2, size); 713 NetOurHostName[size] = 0; 714 break; 715 case 15: /* Ignore Domain Name Option */ 716 break; 717 case 17: 718 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), oplen); 719 memcpy (&NetOurRootPath, popt + 2, size); 720 NetOurRootPath[size] = 0; 721 break; 722 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) 723 case 42: /* NTP server IP */ 724 NetCopyIP (&NetNtpServerIP, (popt + 2)); 725 break; 726 #endif 727 case 51: 728 NetCopyLong (&dhcp_leasetime, (ulong *) (popt + 2)); 729 break; 730 case 53: /* Ignore Message Type Option */ 731 break; 732 case 54: 733 NetCopyIP (&NetDHCPServerIP, (popt + 2)); 734 break; 735 case 58: /* Ignore Renewal Time Option */ 736 break; 737 case 59: /* Ignore Rebinding Time Option */ 738 break; 739 case 66: /* Ignore TFTP server name */ 740 break; 741 case 67: /* vendor opt bootfile */ 742 /* 743 * I can't use dhcp_vendorex_proc here because I need 744 * to write into the bootp packet - even then I had to 745 * pass the bootp packet pointer into here as the 746 * second arg 747 */ 748 size = truncate_sz ("Opt Boot File", 749 sizeof(bp->bp_file), 750 oplen); 751 if (bp->bp_file[0] == '\0' && size > 0) { 752 /* 753 * only use vendor boot file if we didn't 754 * receive a boot file in the main non-vendor 755 * part of the packet - god only knows why 756 * some vendors chose not to use this perfectly 757 * good spot to store the boot file (join on 758 * Tru64 Unix) it seems mind bogglingly crazy 759 * to me 760 */ 761 printf("*** WARNING: using vendor " 762 "optional boot file\n"); 763 memcpy(bp->bp_file, popt + 2, size); 764 bp->bp_file[size] = '\0'; 765 } 766 break; 767 default: 768 #if defined(CONFIG_BOOTP_VENDOREX) 769 if (dhcp_vendorex_proc (popt)) 770 break; 771 #endif 772 printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt); 773 break; 774 } 775 popt += oplen + 2; /* Process next option */ 776 } 777 } 778 779 static int DhcpMessageType(unsigned char *popt) 780 { 781 if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC)) 782 return -1; 783 784 popt += 4; 785 while ( *popt != 0xff ) { 786 if ( *popt == 53 ) /* DHCP Message Type */ 787 return *(popt + 2); 788 popt += *(popt + 1) + 2; /* Scan through all options */ 789 } 790 return -1; 791 } 792 793 static void DhcpSendRequestPkt(Bootp_t *bp_offer) 794 { 795 volatile uchar *pkt, *iphdr; 796 Bootp_t *bp; 797 int pktlen, iplen, extlen; 798 IPaddr_t OfferedIP; 799 800 debug("DhcpSendRequestPkt: Sending DHCPREQUEST\n"); 801 pkt = NetTxPacket; 802 memset ((void*)pkt, 0, PKTSIZE); 803 804 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); 805 806 iphdr = pkt; /* We'll need this later to set proper pkt size */ 807 pkt += IP_HDR_SIZE; 808 809 bp = (Bootp_t *)pkt; 810 bp->bp_op = OP_BOOTREQUEST; 811 bp->bp_htype = HWT_ETHER; 812 bp->bp_hlen = HWL_ETHER; 813 bp->bp_hops = 0; 814 bp->bp_secs = htons(get_timer(0) / 1000); 815 /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by 816 * the server yet */ 817 818 /* 819 * RFC3046 requires Relay Agents to discard packets with 820 * nonzero and offered giaddr 821 */ 822 NetWriteIP(&bp->bp_giaddr, 0); 823 824 memcpy (bp->bp_chaddr, NetOurEther, 6); 825 826 /* 827 * ID is the id of the OFFER packet 828 */ 829 830 NetCopyLong(&bp->bp_id, &bp_offer->bp_id); 831 832 /* 833 * Copy options from OFFER packet if present 834 */ 835 836 /* Copy offered IP into the parameters request list */ 837 NetCopyIP(&OfferedIP, &bp_offer->bp_yiaddr); 838 extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_REQUEST, NetDHCPServerIP, OfferedIP); 839 840 pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; 841 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; 842 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); 843 844 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen); 845 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY 846 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY); 847 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */ 848 NetSendPacket(NetTxPacket, pktlen); 849 } 850 851 /* 852 * Handle DHCP received packets. 853 */ 854 static void 855 DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 856 { 857 Bootp_t *bp = (Bootp_t *)pkt; 858 859 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n", 860 src, dest, len, dhcp_state); 861 862 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ 863 return; 864 865 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n", 866 src, dest, len, dhcp_state); 867 868 switch (dhcp_state) { 869 case SELECTING: 870 /* 871 * Wait an appropriate time for any potential DHCPOFFER packets 872 * to arrive. Then select one, and generate DHCPREQUEST response. 873 * If filename is in format we recognize, assume it is a valid 874 * OFFER from a server we want. 875 */ 876 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file); 877 #ifdef CONFIG_SYS_BOOTFILE_PREFIX 878 if (strncmp(bp->bp_file, 879 CONFIG_SYS_BOOTFILE_PREFIX, 880 strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0 ) { 881 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ 882 883 debug("TRANSITIONING TO REQUESTING STATE\n"); 884 dhcp_state = REQUESTING; 885 886 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 887 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); 888 889 NetSetTimeout(TIMEOUT, BootpTimeout); 890 DhcpSendRequestPkt(bp); 891 #ifdef CONFIG_SYS_BOOTFILE_PREFIX 892 } 893 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ 894 895 return; 896 break; 897 case REQUESTING: 898 debug("DHCP State: REQUESTING\n"); 899 900 if ( DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK ) { 901 char *s; 902 903 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 904 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); 905 BootpCopyNetParams(bp); /* Store net params from reply */ 906 dhcp_state = BOUND; 907 printf ("DHCP client bound to address %pI4\n", &NetOurIP); 908 909 /* Obey the 'autoload' setting */ 910 if ((s = getenv("autoload")) != NULL) { 911 if (*s == 'n') { 912 /* 913 * Just use BOOTP to configure system; 914 * Do not use TFTP to load the bootfile. 915 */ 916 NetState = NETLOOP_SUCCESS; 917 return; 918 #if defined(CONFIG_CMD_NFS) 919 } else if (strcmp(s, "NFS") == 0) { 920 /* 921 * Use NFS to load the bootfile. 922 */ 923 NfsStart(); 924 return; 925 #endif 926 } 927 } 928 TftpStart(); 929 return; 930 } 931 break; 932 case BOUND: 933 /* DHCP client bound to address */ 934 break; 935 default: 936 puts ("DHCP: INVALID STATE\n"); 937 break; 938 } 939 940 } 941 942 void DhcpRequest(void) 943 { 944 BootpRequest(); 945 } 946 #endif /* CONFIG_CMD_DHCP */ 947 948 #endif /* CONFIG_CMD_NET */ 949