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 #include <linux/compiler.h> 21 22 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */ 23 24 #define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */ 25 #ifndef CONFIG_NET_RETRY_COUNT 26 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 27 #else 28 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) 29 #endif 30 31 #define PORT_BOOTPS 67 /* BOOTP server UDP port */ 32 #define PORT_BOOTPC 68 /* BOOTP client UDP port */ 33 34 #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */ 35 #define CONFIG_DHCP_MIN_EXT_LEN 64 36 #endif 37 38 ulong BootpID; 39 int BootpTry; 40 #ifdef CONFIG_BOOTP_RANDOM_DELAY 41 ulong seed1, seed2; 42 #endif 43 44 #if defined(CONFIG_CMD_DHCP) 45 dhcp_state_t dhcp_state = INIT; 46 unsigned long dhcp_leasetime = 0; 47 IPaddr_t NetDHCPServerIP = 0; 48 static void DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 49 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 __maybe_unused 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 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) 233 case 42: /* NTP server IP */ 234 NetCopyIP(&NetNtpServerIP, (IPaddr_t *) (ext + 2)); 235 break; 236 #endif 237 /* Application layer fields */ 238 case 43: /* Vendor specific info - Not yet supported */ 239 /* 240 * Binary information to exchange specific 241 * product information. 242 */ 243 break; 244 /* Reserved (custom) fields (128..254) */ 245 } 246 } 247 248 static void BootpVendorProcess (u8 * ext, int size) 249 { 250 u8 *end = ext + size; 251 252 debug("[BOOTP] Checking extension (%d bytes)...\n", size); 253 254 while ((ext < end) && (*ext != 0xff)) { 255 if (*ext == 0) { 256 ext++; 257 } else { 258 u8 *opt = ext; 259 260 ext += ext[1] + 2; 261 if (ext <= end) 262 BootpVendorFieldProcess (opt); 263 } 264 } 265 266 debug("[BOOTP] Received fields: \n"); 267 if (NetOurSubnetMask) 268 debug("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask); 269 270 if (NetOurGatewayIP) 271 debug("NetOurGatewayIP : %pI4", &NetOurGatewayIP); 272 273 if (NetBootFileSize) 274 debug("NetBootFileSize : %d\n", NetBootFileSize); 275 276 if (NetOurHostName[0]) 277 debug("NetOurHostName : %s\n", NetOurHostName); 278 279 if (NetOurRootPath[0]) 280 debug("NetOurRootPath : %s\n", NetOurRootPath); 281 282 if (NetOurNISDomain[0]) 283 debug("NetOurNISDomain : %s\n", NetOurNISDomain); 284 285 if (NetBootFileSize) 286 debug("NetBootFileSize: %d\n", NetBootFileSize); 287 288 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) 289 if (NetNtpServerIP) 290 debug("NetNtpServerIP : %pI4\n", &NetNtpServerIP); 291 #endif 292 } 293 294 /* 295 * Handle a BOOTP received packet. 296 */ 297 static void 298 BootpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 299 unsigned len) 300 { 301 Bootp_t *bp; 302 303 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n", 304 src, dest, len, sizeof (Bootp_t)); 305 306 bp = (Bootp_t *)pkt; 307 308 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ 309 return; 310 311 /* 312 * Got a good BOOTP reply. Copy the data into our variables. 313 */ 314 #ifdef CONFIG_STATUS_LED 315 status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF); 316 #endif 317 318 BootpCopyNetParams(bp); /* Store net parameters from reply */ 319 320 /* Retrieve extended information (we must parse the vendor area) */ 321 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 322 BootpVendorProcess((uchar *)&bp->bp_vend[4], len); 323 324 NetSetTimeout(0, (thand_f *)0); 325 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, "bootp_stop"); 326 327 debug("Got good BOOTP\n"); 328 329 net_auto_load(); 330 } 331 #endif 332 333 /* 334 * Timeout on BOOTP/DHCP request. 335 */ 336 static void 337 BootpTimeout(void) 338 { 339 if (BootpTry >= TIMEOUT_COUNT) { 340 puts ("\nRetry count exceeded; starting again\n"); 341 NetStartAgain (); 342 } else { 343 NetSetTimeout (TIMEOUT, BootpTimeout); 344 BootpRequest (); 345 } 346 } 347 348 /* 349 * Initialize BOOTP extension fields in the request. 350 */ 351 #if defined(CONFIG_CMD_DHCP) 352 static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP) 353 { 354 u8 *start = e; 355 u8 *cnt; 356 #if defined(CONFIG_BOOTP_PXE) 357 char *uuid; 358 size_t vci_strlen; 359 u16 clientarch; 360 #endif 361 362 #if defined(CONFIG_BOOTP_VENDOREX) 363 u8 *x; 364 #endif 365 #if defined(CONFIG_BOOTP_SEND_HOSTNAME) 366 char *hostname; 367 #endif 368 369 *e++ = 99; /* RFC1048 Magic Cookie */ 370 *e++ = 130; 371 *e++ = 83; 372 *e++ = 99; 373 374 *e++ = 53; /* DHCP Message Type */ 375 *e++ = 1; 376 *e++ = message_type; 377 378 *e++ = 57; /* Maximum DHCP Message Size */ 379 *e++ = 2; 380 *e++ = (576 - 312 + OPT_SIZE) >> 8; 381 *e++ = (576 - 312 + OPT_SIZE) & 0xff; 382 383 if (ServerID) { 384 int tmp = ntohl (ServerID); 385 386 *e++ = 54; /* ServerID */ 387 *e++ = 4; 388 *e++ = tmp >> 24; 389 *e++ = tmp >> 16; 390 *e++ = tmp >> 8; 391 *e++ = tmp & 0xff; 392 } 393 394 if (RequestedIP) { 395 int tmp = ntohl (RequestedIP); 396 397 *e++ = 50; /* Requested IP */ 398 *e++ = 4; 399 *e++ = tmp >> 24; 400 *e++ = tmp >> 16; 401 *e++ = tmp >> 8; 402 *e++ = tmp & 0xff; 403 } 404 #if defined(CONFIG_BOOTP_SEND_HOSTNAME) 405 if ((hostname = getenv ("hostname"))) { 406 int hostnamelen = strlen (hostname); 407 408 *e++ = 12; /* Hostname */ 409 *e++ = hostnamelen; 410 memcpy (e, hostname, hostnamelen); 411 e += hostnamelen; 412 } 413 #endif 414 415 #if defined(CONFIG_BOOTP_PXE) 416 clientarch = CONFIG_BOOTP_PXE_CLIENTARCH; 417 *e++ = 93; /* Client System Architecture */ 418 *e++ = 2; 419 *e++ = (clientarch >> 8) & 0xff; 420 *e++ = clientarch & 0xff; 421 422 *e++ = 94; /* Client Network Interface Identifier */ 423 *e++ = 3; 424 *e++ = 1; /* type field for UNDI */ 425 *e++ = 0; /* major revision */ 426 *e++ = 0; /* minor revision */ 427 428 uuid = getenv("pxeuuid"); 429 430 if (uuid) { 431 if (uuid_str_valid(uuid)) { 432 *e++ = 97; /* Client Machine Identifier */ 433 *e++ = 17; 434 *e++ = 0; /* type 0 - UUID */ 435 436 uuid_str_to_bin(uuid, e); 437 e += 16; 438 } else { 439 printf("Invalid pxeuuid: %s\n", uuid); 440 } 441 } 442 443 *e++ = 60; /* Vendor Class Identifier */ 444 vci_strlen = strlen(CONFIG_BOOTP_VCI_STRING); 445 *e++ = vci_strlen; 446 memcpy(e, CONFIG_BOOTP_VCI_STRING, vci_strlen); 447 e += vci_strlen; 448 #endif 449 450 #if defined(CONFIG_BOOTP_VENDOREX) 451 if ((x = dhcp_vendorex_prep (e))) 452 return x - start; 453 #endif 454 455 *e++ = 55; /* Parameter Request List */ 456 cnt = e++; /* Pointer to count of requested items */ 457 *cnt = 0; 458 #if defined(CONFIG_BOOTP_SUBNETMASK) 459 *e++ = 1; /* Subnet Mask */ 460 *cnt += 1; 461 #endif 462 #if defined(CONFIG_BOOTP_TIMEOFFSET) 463 *e++ = 2; 464 *cnt += 1; 465 #endif 466 #if defined(CONFIG_BOOTP_GATEWAY) 467 *e++ = 3; /* Router Option */ 468 *cnt += 1; 469 #endif 470 #if defined(CONFIG_BOOTP_DNS) 471 *e++ = 6; /* DNS Server(s) */ 472 *cnt += 1; 473 #endif 474 #if defined(CONFIG_BOOTP_HOSTNAME) 475 *e++ = 12; /* Hostname */ 476 *cnt += 1; 477 #endif 478 #if defined(CONFIG_BOOTP_BOOTFILESIZE) 479 *e++ = 13; /* Boot File Size */ 480 *cnt += 1; 481 #endif 482 #if defined(CONFIG_BOOTP_BOOTPATH) 483 *e++ = 17; /* Boot path */ 484 *cnt += 1; 485 #endif 486 #if defined(CONFIG_BOOTP_NISDOMAIN) 487 *e++ = 40; /* NIS Domain name request */ 488 *cnt += 1; 489 #endif 490 #if defined(CONFIG_BOOTP_NTPSERVER) 491 *e++ = 42; 492 *cnt += 1; 493 #endif 494 /* no options, so back up to avoid sending an empty request list */ 495 if (*cnt == 0) 496 e -= 2; 497 498 *e++ = 255; /* End of the list */ 499 500 /* Pad to minimal length */ 501 #ifdef CONFIG_DHCP_MIN_EXT_LEN 502 while ((e - start) < CONFIG_DHCP_MIN_EXT_LEN) 503 *e++ = 0; 504 #endif 505 506 return e - start; 507 } 508 509 #else 510 /* 511 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk! 512 */ 513 static int BootpExtended (u8 * e) 514 { 515 u8 *start = e; 516 517 *e++ = 99; /* RFC1048 Magic Cookie */ 518 *e++ = 130; 519 *e++ = 83; 520 *e++ = 99; 521 522 #if defined(CONFIG_CMD_DHCP) 523 *e++ = 53; /* DHCP Message Type */ 524 *e++ = 1; 525 *e++ = DHCP_DISCOVER; 526 527 *e++ = 57; /* Maximum DHCP Message Size */ 528 *e++ = 2; 529 *e++ = (576 - 312 + OPT_SIZE) >> 16; 530 *e++ = (576 - 312 + OPT_SIZE) & 0xff; 531 #endif 532 533 #if defined(CONFIG_BOOTP_SUBNETMASK) 534 *e++ = 1; /* Subnet mask request */ 535 *e++ = 4; 536 e += 4; 537 #endif 538 539 #if defined(CONFIG_BOOTP_GATEWAY) 540 *e++ = 3; /* Default gateway request */ 541 *e++ = 4; 542 e += 4; 543 #endif 544 545 #if defined(CONFIG_BOOTP_DNS) 546 *e++ = 6; /* Domain Name Server */ 547 *e++ = 4; 548 e += 4; 549 #endif 550 551 #if defined(CONFIG_BOOTP_HOSTNAME) 552 *e++ = 12; /* Host name request */ 553 *e++ = 32; 554 e += 32; 555 #endif 556 557 #if defined(CONFIG_BOOTP_BOOTFILESIZE) 558 *e++ = 13; /* Boot file size */ 559 *e++ = 2; 560 e += 2; 561 #endif 562 563 #if defined(CONFIG_BOOTP_BOOTPATH) 564 *e++ = 17; /* Boot path */ 565 *e++ = 32; 566 e += 32; 567 #endif 568 569 #if defined(CONFIG_BOOTP_NISDOMAIN) 570 *e++ = 40; /* NIS Domain name request */ 571 *e++ = 32; 572 e += 32; 573 #endif 574 #if defined(CONFIG_BOOTP_NTPSERVER) 575 *e++ = 42; 576 *e++ = 4; 577 e += 4; 578 #endif 579 580 *e++ = 255; /* End of the list */ 581 582 return e - start; 583 } 584 #endif 585 586 void 587 BootpRequest (void) 588 { 589 volatile uchar *pkt, *iphdr; 590 Bootp_t *bp; 591 int ext_len, pktlen, iplen; 592 593 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START, "bootp_start"); 594 #if defined(CONFIG_CMD_DHCP) 595 dhcp_state = INIT; 596 #endif 597 598 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ 599 unsigned char bi_enetaddr[6]; 600 int reg; 601 ulong tst1, tst2, sum, m_mask, m_value = 0; 602 603 if (BootpTry ==0) { 604 /* get our mac */ 605 eth_getenv_enetaddr("ethaddr", bi_enetaddr); 606 607 debug("BootpRequest => Our Mac: "); 608 for (reg=0; reg<6; reg++) 609 debug("%x%c", bi_enetaddr[reg], reg==5 ? '\n' : ':'); 610 611 /* Mac-Manipulation 2 get seed1 */ 612 tst1=0; 613 tst2=0; 614 for (reg=2; reg<6; reg++) { 615 tst1 = tst1 << 8; 616 tst1 = tst1 | bi_enetaddr[reg]; 617 } 618 for (reg=0; reg<2; reg++) { 619 tst2 = tst2 | bi_enetaddr[reg]; 620 tst2 = tst2 << 8; 621 } 622 623 seed1 = tst1^tst2; 624 625 /* Mirror seed1*/ 626 m_mask=0x1; 627 for (reg=1;reg<=32;reg++) { 628 m_value |= (m_mask & seed1); 629 seed1 = seed1 >> 1; 630 m_value = m_value << 1; 631 } 632 seed1 = m_value; 633 seed2 = 0xB78D0945; 634 } 635 636 /* Random Number Generator */ 637 638 for (reg=0;reg<=0;reg++) { 639 sum = seed1 + seed2; 640 if (sum < seed1 || sum < seed2) 641 sum++; 642 seed2 = seed1; 643 seed1 = sum; 644 645 if (BootpTry<=2) { /* Start with max 1024 * 1ms */ 646 sum = sum >> (22-BootpTry); 647 } else { /*After 3rd BOOTP request max 8192 * 1ms */ 648 sum = sum >> 19; 649 } 650 } 651 652 printf ("Random delay: %ld ms...\n", sum); 653 for (reg=0; reg <sum; reg++) { 654 udelay(1000); /*Wait 1ms*/ 655 } 656 #endif /* CONFIG_BOOTP_RANDOM_DELAY */ 657 658 printf("BOOTP broadcast %d\n", ++BootpTry); 659 pkt = NetTxPacket; 660 memset ((void*)pkt, 0, PKTSIZE); 661 662 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); 663 664 /* 665 * Next line results in incorrect packet size being transmitted, resulting 666 * in errors in some DHCP servers, reporting missing bytes. Size must be 667 * set in packet header after extension length has been determined. 668 * C. Hallinan, DS4.COM, Inc. 669 */ 670 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */ 671 iphdr = pkt; /* We need this later for NetSetIP() */ 672 pkt += IP_HDR_SIZE; 673 674 bp = (Bootp_t *)pkt; 675 bp->bp_op = OP_BOOTREQUEST; 676 bp->bp_htype = HWT_ETHER; 677 bp->bp_hlen = HWL_ETHER; 678 bp->bp_hops = 0; 679 bp->bp_secs = htons(get_timer(0) / 1000); 680 NetWriteIP(&bp->bp_ciaddr, 0); 681 NetWriteIP(&bp->bp_yiaddr, 0); 682 NetWriteIP(&bp->bp_siaddr, 0); 683 NetWriteIP(&bp->bp_giaddr, 0); 684 memcpy (bp->bp_chaddr, NetOurEther, 6); 685 copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file)); 686 687 /* Request additional information from the BOOTP/DHCP server */ 688 #if defined(CONFIG_CMD_DHCP) 689 ext_len = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0); 690 #else 691 ext_len = BootpExtended((u8 *)bp->bp_vend); 692 #endif 693 694 /* 695 * Bootp ID is the lower 4 bytes of our ethernet address 696 * plus the current time in ms. 697 */ 698 BootpID = ((ulong)NetOurEther[2] << 24) 699 | ((ulong)NetOurEther[3] << 16) 700 | ((ulong)NetOurEther[4] << 8) 701 | (ulong)NetOurEther[5]; 702 BootpID += get_timer(0); 703 BootpID = htonl(BootpID); 704 NetCopyLong(&bp->bp_id, &BootpID); 705 706 /* 707 * Calculate proper packet lengths taking into account the 708 * variable size of the options field 709 */ 710 pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; 711 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; 712 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); 713 NetSetTimeout(SELECT_TIMEOUT, BootpTimeout); 714 715 #if defined(CONFIG_CMD_DHCP) 716 dhcp_state = SELECTING; 717 NetSetHandler(DhcpHandler); 718 #else 719 NetSetHandler(BootpHandler); 720 #endif 721 NetSendPacket(NetTxPacket, pktlen); 722 } 723 724 #if defined(CONFIG_CMD_DHCP) 725 static void DhcpOptionsProcess (uchar * popt, Bootp_t *bp) 726 { 727 uchar *end = popt + BOOTP_HDR_SIZE; 728 int oplen, size; 729 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) 730 int *to_ptr; 731 #endif 732 733 while (popt < end && *popt != 0xff) { 734 oplen = *(popt + 1); 735 switch (*popt) { 736 case 1: 737 NetCopyIP (&NetOurSubnetMask, (popt + 2)); 738 break; 739 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) 740 case 2: /* Time offset */ 741 to_ptr = &NetTimeOffset; 742 NetCopyLong ((ulong *)to_ptr, (ulong *)(popt + 2)); 743 NetTimeOffset = ntohl (NetTimeOffset); 744 break; 745 #endif 746 case 3: 747 NetCopyIP (&NetOurGatewayIP, (popt + 2)); 748 break; 749 case 6: 750 NetCopyIP (&NetOurDNSIP, (popt + 2)); 751 #if defined(CONFIG_BOOTP_DNS2) 752 if (*(popt + 1) > 4) { 753 NetCopyIP (&NetOurDNS2IP, (popt + 2 + 4)); 754 } 755 #endif 756 break; 757 case 12: 758 size = truncate_sz ("Host Name", sizeof (NetOurHostName), oplen); 759 memcpy (&NetOurHostName, popt + 2, size); 760 NetOurHostName[size] = 0; 761 break; 762 case 15: /* Ignore Domain Name Option */ 763 break; 764 case 17: 765 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), oplen); 766 memcpy (&NetOurRootPath, popt + 2, size); 767 NetOurRootPath[size] = 0; 768 break; 769 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) 770 case 42: /* NTP server IP */ 771 NetCopyIP (&NetNtpServerIP, (popt + 2)); 772 break; 773 #endif 774 case 51: 775 NetCopyLong (&dhcp_leasetime, (ulong *) (popt + 2)); 776 break; 777 case 53: /* Ignore Message Type Option */ 778 break; 779 case 54: 780 NetCopyIP (&NetDHCPServerIP, (popt + 2)); 781 break; 782 case 58: /* Ignore Renewal Time Option */ 783 break; 784 case 59: /* Ignore Rebinding Time Option */ 785 break; 786 case 66: /* Ignore TFTP server name */ 787 break; 788 case 67: /* vendor opt bootfile */ 789 /* 790 * I can't use dhcp_vendorex_proc here because I need 791 * to write into the bootp packet - even then I had to 792 * pass the bootp packet pointer into here as the 793 * second arg 794 */ 795 size = truncate_sz ("Opt Boot File", 796 sizeof(bp->bp_file), 797 oplen); 798 if (bp->bp_file[0] == '\0' && size > 0) { 799 /* 800 * only use vendor boot file if we didn't 801 * receive a boot file in the main non-vendor 802 * part of the packet - god only knows why 803 * some vendors chose not to use this perfectly 804 * good spot to store the boot file (join on 805 * Tru64 Unix) it seems mind bogglingly crazy 806 * to me 807 */ 808 printf("*** WARNING: using vendor " 809 "optional boot file\n"); 810 memcpy(bp->bp_file, popt + 2, size); 811 bp->bp_file[size] = '\0'; 812 } 813 break; 814 default: 815 #if defined(CONFIG_BOOTP_VENDOREX) 816 if (dhcp_vendorex_proc (popt)) 817 break; 818 #endif 819 printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt); 820 break; 821 } 822 popt += oplen + 2; /* Process next option */ 823 } 824 } 825 826 static int DhcpMessageType(unsigned char *popt) 827 { 828 if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC)) 829 return -1; 830 831 popt += 4; 832 while ( *popt != 0xff ) { 833 if ( *popt == 53 ) /* DHCP Message Type */ 834 return *(popt + 2); 835 popt += *(popt + 1) + 2; /* Scan through all options */ 836 } 837 return -1; 838 } 839 840 static void DhcpSendRequestPkt(Bootp_t *bp_offer) 841 { 842 volatile uchar *pkt, *iphdr; 843 Bootp_t *bp; 844 int pktlen, iplen, extlen; 845 IPaddr_t OfferedIP; 846 847 debug("DhcpSendRequestPkt: Sending DHCPREQUEST\n"); 848 pkt = NetTxPacket; 849 memset ((void*)pkt, 0, PKTSIZE); 850 851 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); 852 853 iphdr = pkt; /* We'll need this later to set proper pkt size */ 854 pkt += IP_HDR_SIZE; 855 856 bp = (Bootp_t *)pkt; 857 bp->bp_op = OP_BOOTREQUEST; 858 bp->bp_htype = HWT_ETHER; 859 bp->bp_hlen = HWL_ETHER; 860 bp->bp_hops = 0; 861 bp->bp_secs = htons(get_timer(0) / 1000); 862 /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by 863 * the server yet */ 864 865 /* 866 * RFC3046 requires Relay Agents to discard packets with 867 * nonzero and offered giaddr 868 */ 869 NetWriteIP(&bp->bp_giaddr, 0); 870 871 memcpy (bp->bp_chaddr, NetOurEther, 6); 872 873 /* 874 * ID is the id of the OFFER packet 875 */ 876 877 NetCopyLong(&bp->bp_id, &bp_offer->bp_id); 878 879 /* 880 * Copy options from OFFER packet if present 881 */ 882 883 /* Copy offered IP into the parameters request list */ 884 NetCopyIP(&OfferedIP, &bp_offer->bp_yiaddr); 885 extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_REQUEST, NetDHCPServerIP, OfferedIP); 886 887 pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; 888 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; 889 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); 890 891 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen); 892 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY 893 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY); 894 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */ 895 NetSendPacket(NetTxPacket, pktlen); 896 } 897 898 /* 899 * Handle DHCP received packets. 900 */ 901 static void 902 DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 903 unsigned len) 904 { 905 Bootp_t *bp = (Bootp_t *)pkt; 906 907 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n", 908 src, dest, len, dhcp_state); 909 910 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ 911 return; 912 913 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n", 914 src, dest, len, dhcp_state); 915 916 switch (dhcp_state) { 917 case SELECTING: 918 /* 919 * Wait an appropriate time for any potential DHCPOFFER packets 920 * to arrive. Then select one, and generate DHCPREQUEST response. 921 * If filename is in format we recognize, assume it is a valid 922 * OFFER from a server we want. 923 */ 924 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file); 925 #ifdef CONFIG_SYS_BOOTFILE_PREFIX 926 if (strncmp(bp->bp_file, 927 CONFIG_SYS_BOOTFILE_PREFIX, 928 strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0 ) { 929 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ 930 931 debug("TRANSITIONING TO REQUESTING STATE\n"); 932 dhcp_state = REQUESTING; 933 934 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 935 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); 936 937 NetSetTimeout(TIMEOUT, BootpTimeout); 938 DhcpSendRequestPkt(bp); 939 #ifdef CONFIG_SYS_BOOTFILE_PREFIX 940 } 941 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ 942 943 return; 944 break; 945 case REQUESTING: 946 debug("DHCP State: REQUESTING\n"); 947 948 if ( DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK ) { 949 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 950 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); 951 BootpCopyNetParams(bp); /* Store net params from reply */ 952 dhcp_state = BOUND; 953 printf ("DHCP client bound to address %pI4\n", &NetOurIP); 954 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, 955 "bootp_stop"); 956 957 net_auto_load(); 958 return; 959 } 960 break; 961 case BOUND: 962 /* DHCP client bound to address */ 963 break; 964 default: 965 puts ("DHCP: INVALID STATE\n"); 966 break; 967 } 968 969 } 970 971 void DhcpRequest(void) 972 { 973 BootpRequest(); 974 } 975 #endif /* CONFIG_CMD_DHCP */ 976