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