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 #define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */ 24 #ifndef CONFIG_NET_RETRY_COUNT 25 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 26 #else 27 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) 28 #endif 29 30 #define PORT_BOOTPS 67 /* BOOTP server UDP port */ 31 #define PORT_BOOTPC 68 /* BOOTP client UDP port */ 32 33 #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */ 34 #define CONFIG_DHCP_MIN_EXT_LEN 64 35 #endif 36 37 ulong BootpID; 38 int BootpTry; 39 #ifdef CONFIG_BOOTP_RANDOM_DELAY 40 ulong seed1, seed2; 41 #endif 42 43 #if defined(CONFIG_CMD_DHCP) 44 dhcp_state_t dhcp_state = INIT; 45 unsigned long dhcp_leasetime = 0; 46 IPaddr_t NetDHCPServerIP = 0; 47 static void DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 48 unsigned len); 49 50 /* For Debug */ 51 #if 0 52 static char *dhcpmsg2str(int type) 53 { 54 switch (type) { 55 case 1: return "DHCPDISCOVER"; break; 56 case 2: return "DHCPOFFER"; break; 57 case 3: return "DHCPREQUEST"; break; 58 case 4: return "DHCPDECLINE"; break; 59 case 5: return "DHCPACK"; break; 60 case 6: return "DHCPNACK"; break; 61 case 7: return "DHCPRELEASE"; break; 62 default: return "UNKNOWN/INVALID MSG TYPE"; break; 63 } 64 } 65 #endif 66 67 #if defined(CONFIG_BOOTP_VENDOREX) 68 extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e after add own opts. */ 69 extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL */ 70 #endif 71 72 #endif 73 74 static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len) 75 { 76 Bootp_t *bp = (Bootp_t *) pkt; 77 int retval = 0; 78 79 if (dest != PORT_BOOTPC || src != PORT_BOOTPS) 80 retval = -1; 81 else if (len < sizeof (Bootp_t) - OPT_SIZE) 82 retval = -2; 83 else if (bp->bp_op != OP_BOOTREQUEST && 84 bp->bp_op != OP_BOOTREPLY && 85 bp->bp_op != DHCP_OFFER && 86 bp->bp_op != DHCP_ACK && 87 bp->bp_op != DHCP_NAK ) { 88 retval = -3; 89 } 90 else if (bp->bp_htype != HWT_ETHER) 91 retval = -4; 92 else if (bp->bp_hlen != HWL_ETHER) 93 retval = -5; 94 else if (NetReadLong((ulong*)&bp->bp_id) != BootpID) { 95 retval = -6; 96 } 97 98 debug("Filtering pkt = %d\n", retval); 99 100 return retval; 101 } 102 103 /* 104 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet 105 */ 106 static void BootpCopyNetParams(Bootp_t *bp) 107 { 108 IPaddr_t tmp_ip; 109 110 NetCopyIP(&NetOurIP, &bp->bp_yiaddr); 111 #if !defined(CONFIG_BOOTP_SERVERIP) 112 NetCopyIP(&tmp_ip, &bp->bp_siaddr); 113 if (tmp_ip != 0) 114 NetCopyIP(&NetServerIP, &bp->bp_siaddr); 115 memcpy (NetServerEther, ((Ethernet_t *)NetRxPacket)->et_src, 6); 116 #endif 117 if (strlen(bp->bp_file) > 0) 118 copy_filename (BootFile, bp->bp_file, sizeof(BootFile)); 119 120 debug("Bootfile: %s\n", BootFile); 121 122 /* Propagate to environment: 123 * don't delete exising entry when BOOTP / DHCP reply does 124 * not contain a new value 125 */ 126 if (*BootFile) { 127 setenv ("bootfile", BootFile); 128 } 129 } 130 131 static int truncate_sz (const char *name, int maxlen, int curlen) 132 { 133 if (curlen >= maxlen) { 134 printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n", 135 name, curlen, maxlen); 136 curlen = maxlen - 1; 137 } 138 return (curlen); 139 } 140 141 #if !defined(CONFIG_CMD_DHCP) 142 143 static void BootpVendorFieldProcess (u8 * ext) 144 { 145 int size = *(ext + 1); 146 147 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext, 148 *(ext + 1)); 149 150 NetBootFileSize = 0; 151 152 switch (*ext) { 153 /* Fixed length fields */ 154 case 1: /* Subnet mask */ 155 if (NetOurSubnetMask == 0) 156 NetCopyIP (&NetOurSubnetMask, (IPaddr_t *) (ext + 2)); 157 break; 158 case 2: /* Time offset - Not yet supported */ 159 break; 160 /* Variable length fields */ 161 case 3: /* Gateways list */ 162 if (NetOurGatewayIP == 0) { 163 NetCopyIP (&NetOurGatewayIP, (IPaddr_t *) (ext + 2)); 164 } 165 break; 166 case 4: /* Time server - Not yet supported */ 167 break; 168 case 5: /* IEN-116 name server - Not yet supported */ 169 break; 170 case 6: 171 if (NetOurDNSIP == 0) { 172 NetCopyIP (&NetOurDNSIP, (IPaddr_t *) (ext + 2)); 173 } 174 #if defined(CONFIG_BOOTP_DNS2) 175 if ((NetOurDNS2IP == 0) && (size > 4)) { 176 NetCopyIP (&NetOurDNS2IP, (IPaddr_t *) (ext + 2 + 4)); 177 } 178 #endif 179 break; 180 case 7: /* Log server - Not yet supported */ 181 break; 182 case 8: /* Cookie/Quote server - Not yet supported */ 183 break; 184 case 9: /* LPR server - Not yet supported */ 185 break; 186 case 10: /* Impress server - Not yet supported */ 187 break; 188 case 11: /* RPL server - Not yet supported */ 189 break; 190 case 12: /* Host name */ 191 if (NetOurHostName[0] == 0) { 192 size = truncate_sz ("Host Name", sizeof (NetOurHostName), size); 193 memcpy (&NetOurHostName, ext + 2, size); 194 NetOurHostName[size] = 0; 195 } 196 break; 197 case 13: /* Boot file size */ 198 if (size == 2) 199 NetBootFileSize = ntohs (*(ushort *) (ext + 2)); 200 else if (size == 4) 201 NetBootFileSize = ntohl (*(ulong *) (ext + 2)); 202 break; 203 case 14: /* Merit dump file - Not yet supported */ 204 break; 205 case 15: /* Domain name - Not yet supported */ 206 break; 207 case 16: /* Swap server - Not yet supported */ 208 break; 209 case 17: /* Root path */ 210 if (NetOurRootPath[0] == 0) { 211 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), size); 212 memcpy (&NetOurRootPath, ext + 2, size); 213 NetOurRootPath[size] = 0; 214 } 215 break; 216 case 18: /* Extension path - Not yet supported */ 217 /* 218 * This can be used to send the information of the 219 * vendor area in another file that the client can 220 * access via TFTP. 221 */ 222 break; 223 /* IP host layer fields */ 224 case 40: /* NIS Domain name */ 225 if (NetOurNISDomain[0] == 0) { 226 size = truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain), size); 227 memcpy (&NetOurNISDomain, ext + 2, size); 228 NetOurNISDomain[size] = 0; 229 } 230 break; 231 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) 232 case 42: /* NTP server IP */ 233 NetCopyIP(&NetNtpServerIP, (IPaddr_t *) (ext + 2)); 234 break; 235 #endif 236 /* Application layer fields */ 237 case 43: /* Vendor specific info - Not yet supported */ 238 /* 239 * Binary information to exchange specific 240 * product information. 241 */ 242 break; 243 /* Reserved (custom) fields (128..254) */ 244 } 245 } 246 247 static void BootpVendorProcess (u8 * ext, int size) 248 { 249 u8 *end = ext + size; 250 251 debug("[BOOTP] Checking extension (%d bytes)...\n", size); 252 253 while ((ext < end) && (*ext != 0xff)) { 254 if (*ext == 0) { 255 ext++; 256 } else { 257 u8 *opt = ext; 258 259 ext += ext[1] + 2; 260 if (ext <= end) 261 BootpVendorFieldProcess (opt); 262 } 263 } 264 265 debug("[BOOTP] Received fields: \n"); 266 if (NetOurSubnetMask) 267 debug("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask); 268 269 if (NetOurGatewayIP) 270 debug("NetOurGatewayIP : %pI4", &NetOurGatewayIP); 271 272 if (NetBootFileSize) 273 debug("NetBootFileSize : %d\n", NetBootFileSize); 274 275 if (NetOurHostName[0]) 276 debug("NetOurHostName : %s\n", NetOurHostName); 277 278 if (NetOurRootPath[0]) 279 debug("NetOurRootPath : %s\n", NetOurRootPath); 280 281 if (NetOurNISDomain[0]) 282 debug("NetOurNISDomain : %s\n", NetOurNISDomain); 283 284 if (NetBootFileSize) 285 debug("NetBootFileSize: %d\n", NetBootFileSize); 286 287 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) 288 if (NetNtpServerIP) 289 debug("NetNtpServerIP : %pI4\n", &NetNtpServerIP); 290 #endif 291 } 292 /* 293 * Handle a BOOTP received packet. 294 */ 295 static void 296 BootpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 297 unsigned len) 298 { 299 Bootp_t *bp; 300 char *s; 301 302 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n", 303 src, dest, len, sizeof (Bootp_t)); 304 305 bp = (Bootp_t *)pkt; 306 307 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ 308 return; 309 310 /* 311 * Got a good BOOTP reply. Copy the data into our variables. 312 */ 313 #ifdef CONFIG_STATUS_LED 314 status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF); 315 #endif 316 317 BootpCopyNetParams(bp); /* Store net parameters from reply */ 318 319 /* Retrieve extended information (we must parse the vendor area) */ 320 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 321 BootpVendorProcess((uchar *)&bp->bp_vend[4], len); 322 323 NetSetTimeout(0, (thand_f *)0); 324 325 debug("Got good BOOTP\n"); 326 327 if ((s = getenv("autoload")) != NULL) { 328 if (*s == 'n') { 329 /* 330 * Just use BOOTP to configure system; 331 * Do not use TFTP to load the bootfile. 332 */ 333 NetState = NETLOOP_SUCCESS; 334 return; 335 #if defined(CONFIG_CMD_NFS) 336 } else if (strcmp(s, "NFS") == 0) { 337 /* 338 * Use NFS to load the bootfile. 339 */ 340 NfsStart(); 341 return; 342 #endif 343 } 344 } 345 346 TftpStart(); 347 } 348 #endif 349 350 /* 351 * Timeout on BOOTP/DHCP request. 352 */ 353 static void 354 BootpTimeout(void) 355 { 356 if (BootpTry >= TIMEOUT_COUNT) { 357 puts ("\nRetry count exceeded; starting again\n"); 358 NetStartAgain (); 359 } else { 360 NetSetTimeout (TIMEOUT, BootpTimeout); 361 BootpRequest (); 362 } 363 } 364 365 /* 366 * Initialize BOOTP extension fields in the request. 367 */ 368 #if defined(CONFIG_CMD_DHCP) 369 static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP) 370 { 371 u8 *start = e; 372 u8 *cnt; 373 374 #if defined(CONFIG_BOOTP_VENDOREX) 375 u8 *x; 376 #endif 377 #if defined(CONFIG_BOOTP_SEND_HOSTNAME) 378 char *hostname; 379 #endif 380 381 *e++ = 99; /* RFC1048 Magic Cookie */ 382 *e++ = 130; 383 *e++ = 83; 384 *e++ = 99; 385 386 *e++ = 53; /* DHCP Message Type */ 387 *e++ = 1; 388 *e++ = message_type; 389 390 *e++ = 57; /* Maximum DHCP Message Size */ 391 *e++ = 2; 392 *e++ = (576 - 312 + OPT_SIZE) >> 8; 393 *e++ = (576 - 312 + OPT_SIZE) & 0xff; 394 395 if (ServerID) { 396 int tmp = ntohl (ServerID); 397 398 *e++ = 54; /* ServerID */ 399 *e++ = 4; 400 *e++ = tmp >> 24; 401 *e++ = tmp >> 16; 402 *e++ = tmp >> 8; 403 *e++ = tmp & 0xff; 404 } 405 406 if (RequestedIP) { 407 int tmp = ntohl (RequestedIP); 408 409 *e++ = 50; /* Requested IP */ 410 *e++ = 4; 411 *e++ = tmp >> 24; 412 *e++ = tmp >> 16; 413 *e++ = tmp >> 8; 414 *e++ = tmp & 0xff; 415 } 416 #if defined(CONFIG_BOOTP_SEND_HOSTNAME) 417 if ((hostname = getenv ("hostname"))) { 418 int hostnamelen = strlen (hostname); 419 420 *e++ = 12; /* Hostname */ 421 *e++ = hostnamelen; 422 memcpy (e, hostname, hostnamelen); 423 e += hostnamelen; 424 } 425 #endif 426 427 #if defined(CONFIG_BOOTP_VENDOREX) 428 if ((x = dhcp_vendorex_prep (e))) 429 return x - start; 430 #endif 431 432 *e++ = 55; /* Parameter Request List */ 433 cnt = e++; /* Pointer to count of requested items */ 434 *cnt = 0; 435 #if defined(CONFIG_BOOTP_SUBNETMASK) 436 *e++ = 1; /* Subnet Mask */ 437 *cnt += 1; 438 #endif 439 #if defined(CONFIG_BOOTP_TIMEOFFSET) 440 *e++ = 2; 441 *cnt += 1; 442 #endif 443 #if defined(CONFIG_BOOTP_GATEWAY) 444 *e++ = 3; /* Router Option */ 445 *cnt += 1; 446 #endif 447 #if defined(CONFIG_BOOTP_DNS) 448 *e++ = 6; /* DNS Server(s) */ 449 *cnt += 1; 450 #endif 451 #if defined(CONFIG_BOOTP_HOSTNAME) 452 *e++ = 12; /* Hostname */ 453 *cnt += 1; 454 #endif 455 #if defined(CONFIG_BOOTP_BOOTFILESIZE) 456 *e++ = 13; /* Boot File Size */ 457 *cnt += 1; 458 #endif 459 #if defined(CONFIG_BOOTP_BOOTPATH) 460 *e++ = 17; /* Boot path */ 461 *cnt += 1; 462 #endif 463 #if defined(CONFIG_BOOTP_NISDOMAIN) 464 *e++ = 40; /* NIS Domain name request */ 465 *cnt += 1; 466 #endif 467 #if defined(CONFIG_BOOTP_NTPSERVER) 468 *e++ = 42; 469 *cnt += 1; 470 #endif 471 /* no options, so back up to avoid sending an empty request list */ 472 if (*cnt == 0) 473 e -= 2; 474 475 *e++ = 255; /* End of the list */ 476 477 /* Pad to minimal length */ 478 #ifdef CONFIG_DHCP_MIN_EXT_LEN 479 while ((e - start) < CONFIG_DHCP_MIN_EXT_LEN) 480 *e++ = 0; 481 #endif 482 483 return e - start; 484 } 485 486 #else 487 /* 488 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk! 489 */ 490 static int BootpExtended (u8 * e) 491 { 492 u8 *start = e; 493 494 *e++ = 99; /* RFC1048 Magic Cookie */ 495 *e++ = 130; 496 *e++ = 83; 497 *e++ = 99; 498 499 #if defined(CONFIG_CMD_DHCP) 500 *e++ = 53; /* DHCP Message Type */ 501 *e++ = 1; 502 *e++ = DHCP_DISCOVER; 503 504 *e++ = 57; /* Maximum DHCP Message Size */ 505 *e++ = 2; 506 *e++ = (576 - 312 + OPT_SIZE) >> 16; 507 *e++ = (576 - 312 + OPT_SIZE) & 0xff; 508 #endif 509 510 #if defined(CONFIG_BOOTP_SUBNETMASK) 511 *e++ = 1; /* Subnet mask request */ 512 *e++ = 4; 513 e += 4; 514 #endif 515 516 #if defined(CONFIG_BOOTP_GATEWAY) 517 *e++ = 3; /* Default gateway request */ 518 *e++ = 4; 519 e += 4; 520 #endif 521 522 #if defined(CONFIG_BOOTP_DNS) 523 *e++ = 6; /* Domain Name Server */ 524 *e++ = 4; 525 e += 4; 526 #endif 527 528 #if defined(CONFIG_BOOTP_HOSTNAME) 529 *e++ = 12; /* Host name request */ 530 *e++ = 32; 531 e += 32; 532 #endif 533 534 #if defined(CONFIG_BOOTP_BOOTFILESIZE) 535 *e++ = 13; /* Boot file size */ 536 *e++ = 2; 537 e += 2; 538 #endif 539 540 #if defined(CONFIG_BOOTP_BOOTPATH) 541 *e++ = 17; /* Boot path */ 542 *e++ = 32; 543 e += 32; 544 #endif 545 546 #if defined(CONFIG_BOOTP_NISDOMAIN) 547 *e++ = 40; /* NIS Domain name request */ 548 *e++ = 32; 549 e += 32; 550 #endif 551 #if defined(CONFIG_BOOTP_NTPSERVER) 552 *e++ = 42; 553 *e++ = 4; 554 e += 4; 555 #endif 556 557 *e++ = 255; /* End of the list */ 558 559 return e - start; 560 } 561 #endif 562 563 void 564 BootpRequest (void) 565 { 566 volatile uchar *pkt, *iphdr; 567 Bootp_t *bp; 568 int ext_len, pktlen, iplen; 569 570 #if defined(CONFIG_CMD_DHCP) 571 dhcp_state = INIT; 572 #endif 573 574 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ 575 unsigned char bi_enetaddr[6]; 576 int reg; 577 ulong tst1, tst2, sum, m_mask, m_value = 0; 578 579 if (BootpTry ==0) { 580 /* get our mac */ 581 eth_getenv_enetaddr("ethaddr", bi_enetaddr); 582 583 debug("BootpRequest => Our Mac: "); 584 for (reg=0; reg<6; reg++) 585 debug("%x%c", bi_enetaddr[reg], reg==5 ? '\n' : ':'); 586 587 /* Mac-Manipulation 2 get seed1 */ 588 tst1=0; 589 tst2=0; 590 for (reg=2; reg<6; reg++) { 591 tst1 = tst1 << 8; 592 tst1 = tst1 | bi_enetaddr[reg]; 593 } 594 for (reg=0; reg<2; reg++) { 595 tst2 = tst2 | bi_enetaddr[reg]; 596 tst2 = tst2 << 8; 597 } 598 599 seed1 = tst1^tst2; 600 601 /* Mirror seed1*/ 602 m_mask=0x1; 603 for (reg=1;reg<=32;reg++) { 604 m_value |= (m_mask & seed1); 605 seed1 = seed1 >> 1; 606 m_value = m_value << 1; 607 } 608 seed1 = m_value; 609 seed2 = 0xB78D0945; 610 } 611 612 /* Random Number Generator */ 613 614 for (reg=0;reg<=0;reg++) { 615 sum = seed1 + seed2; 616 if (sum < seed1 || sum < seed2) 617 sum++; 618 seed2 = seed1; 619 seed1 = sum; 620 621 if (BootpTry<=2) { /* Start with max 1024 * 1ms */ 622 sum = sum >> (22-BootpTry); 623 } else { /*After 3rd BOOTP request max 8192 * 1ms */ 624 sum = sum >> 19; 625 } 626 } 627 628 printf ("Random delay: %ld ms...\n", sum); 629 for (reg=0; reg <sum; reg++) { 630 udelay(1000); /*Wait 1ms*/ 631 } 632 #endif /* CONFIG_BOOTP_RANDOM_DELAY */ 633 634 printf("BOOTP broadcast %d\n", ++BootpTry); 635 pkt = NetTxPacket; 636 memset ((void*)pkt, 0, PKTSIZE); 637 638 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); 639 640 /* 641 * Next line results in incorrect packet size being transmitted, resulting 642 * in errors in some DHCP servers, reporting missing bytes. Size must be 643 * set in packet header after extension length has been determined. 644 * C. Hallinan, DS4.COM, Inc. 645 */ 646 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */ 647 iphdr = pkt; /* We need this later for NetSetIP() */ 648 pkt += IP_HDR_SIZE; 649 650 bp = (Bootp_t *)pkt; 651 bp->bp_op = OP_BOOTREQUEST; 652 bp->bp_htype = HWT_ETHER; 653 bp->bp_hlen = HWL_ETHER; 654 bp->bp_hops = 0; 655 bp->bp_secs = htons(get_timer(0) / 1000); 656 NetWriteIP(&bp->bp_ciaddr, 0); 657 NetWriteIP(&bp->bp_yiaddr, 0); 658 NetWriteIP(&bp->bp_siaddr, 0); 659 NetWriteIP(&bp->bp_giaddr, 0); 660 memcpy (bp->bp_chaddr, NetOurEther, 6); 661 copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file)); 662 663 /* Request additional information from the BOOTP/DHCP server */ 664 #if defined(CONFIG_CMD_DHCP) 665 ext_len = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0); 666 #else 667 ext_len = BootpExtended((u8 *)bp->bp_vend); 668 #endif 669 670 /* 671 * Bootp ID is the lower 4 bytes of our ethernet address 672 * plus the current time in ms. 673 */ 674 BootpID = ((ulong)NetOurEther[2] << 24) 675 | ((ulong)NetOurEther[3] << 16) 676 | ((ulong)NetOurEther[4] << 8) 677 | (ulong)NetOurEther[5]; 678 BootpID += get_timer(0); 679 BootpID = htonl(BootpID); 680 NetCopyLong(&bp->bp_id, &BootpID); 681 682 /* 683 * Calculate proper packet lengths taking into account the 684 * variable size of the options field 685 */ 686 pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; 687 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; 688 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); 689 NetSetTimeout(SELECT_TIMEOUT, BootpTimeout); 690 691 #if defined(CONFIG_CMD_DHCP) 692 dhcp_state = SELECTING; 693 NetSetHandler(DhcpHandler); 694 #else 695 NetSetHandler(BootpHandler); 696 #endif 697 NetSendPacket(NetTxPacket, pktlen); 698 } 699 700 #if defined(CONFIG_CMD_DHCP) 701 static void DhcpOptionsProcess (uchar * popt, Bootp_t *bp) 702 { 703 uchar *end = popt + BOOTP_HDR_SIZE; 704 int oplen, size; 705 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) 706 int *to_ptr; 707 #endif 708 709 while (popt < end && *popt != 0xff) { 710 oplen = *(popt + 1); 711 switch (*popt) { 712 case 1: 713 NetCopyIP (&NetOurSubnetMask, (popt + 2)); 714 break; 715 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) 716 case 2: /* Time offset */ 717 to_ptr = &NetTimeOffset; 718 NetCopyLong ((ulong *)to_ptr, (ulong *)(popt + 2)); 719 NetTimeOffset = ntohl (NetTimeOffset); 720 break; 721 #endif 722 case 3: 723 NetCopyIP (&NetOurGatewayIP, (popt + 2)); 724 break; 725 case 6: 726 NetCopyIP (&NetOurDNSIP, (popt + 2)); 727 #if defined(CONFIG_BOOTP_DNS2) 728 if (*(popt + 1) > 4) { 729 NetCopyIP (&NetOurDNS2IP, (popt + 2 + 4)); 730 } 731 #endif 732 break; 733 case 12: 734 size = truncate_sz ("Host Name", sizeof (NetOurHostName), oplen); 735 memcpy (&NetOurHostName, popt + 2, size); 736 NetOurHostName[size] = 0; 737 break; 738 case 15: /* Ignore Domain Name Option */ 739 break; 740 case 17: 741 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), oplen); 742 memcpy (&NetOurRootPath, popt + 2, size); 743 NetOurRootPath[size] = 0; 744 break; 745 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) 746 case 42: /* NTP server IP */ 747 NetCopyIP (&NetNtpServerIP, (popt + 2)); 748 break; 749 #endif 750 case 51: 751 NetCopyLong (&dhcp_leasetime, (ulong *) (popt + 2)); 752 break; 753 case 53: /* Ignore Message Type Option */ 754 break; 755 case 54: 756 NetCopyIP (&NetDHCPServerIP, (popt + 2)); 757 break; 758 case 58: /* Ignore Renewal Time Option */ 759 break; 760 case 59: /* Ignore Rebinding Time Option */ 761 break; 762 case 66: /* Ignore TFTP server name */ 763 break; 764 case 67: /* vendor opt bootfile */ 765 /* 766 * I can't use dhcp_vendorex_proc here because I need 767 * to write into the bootp packet - even then I had to 768 * pass the bootp packet pointer into here as the 769 * second arg 770 */ 771 size = truncate_sz ("Opt Boot File", 772 sizeof(bp->bp_file), 773 oplen); 774 if (bp->bp_file[0] == '\0' && size > 0) { 775 /* 776 * only use vendor boot file if we didn't 777 * receive a boot file in the main non-vendor 778 * part of the packet - god only knows why 779 * some vendors chose not to use this perfectly 780 * good spot to store the boot file (join on 781 * Tru64 Unix) it seems mind bogglingly crazy 782 * to me 783 */ 784 printf("*** WARNING: using vendor " 785 "optional boot file\n"); 786 memcpy(bp->bp_file, popt + 2, size); 787 bp->bp_file[size] = '\0'; 788 } 789 break; 790 default: 791 #if defined(CONFIG_BOOTP_VENDOREX) 792 if (dhcp_vendorex_proc (popt)) 793 break; 794 #endif 795 printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt); 796 break; 797 } 798 popt += oplen + 2; /* Process next option */ 799 } 800 } 801 802 static int DhcpMessageType(unsigned char *popt) 803 { 804 if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC)) 805 return -1; 806 807 popt += 4; 808 while ( *popt != 0xff ) { 809 if ( *popt == 53 ) /* DHCP Message Type */ 810 return *(popt + 2); 811 popt += *(popt + 1) + 2; /* Scan through all options */ 812 } 813 return -1; 814 } 815 816 static void DhcpSendRequestPkt(Bootp_t *bp_offer) 817 { 818 volatile uchar *pkt, *iphdr; 819 Bootp_t *bp; 820 int pktlen, iplen, extlen; 821 IPaddr_t OfferedIP; 822 823 debug("DhcpSendRequestPkt: Sending DHCPREQUEST\n"); 824 pkt = NetTxPacket; 825 memset ((void*)pkt, 0, PKTSIZE); 826 827 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); 828 829 iphdr = pkt; /* We'll need this later to set proper pkt size */ 830 pkt += IP_HDR_SIZE; 831 832 bp = (Bootp_t *)pkt; 833 bp->bp_op = OP_BOOTREQUEST; 834 bp->bp_htype = HWT_ETHER; 835 bp->bp_hlen = HWL_ETHER; 836 bp->bp_hops = 0; 837 bp->bp_secs = htons(get_timer(0) / 1000); 838 /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by 839 * the server yet */ 840 841 /* 842 * RFC3046 requires Relay Agents to discard packets with 843 * nonzero and offered giaddr 844 */ 845 NetWriteIP(&bp->bp_giaddr, 0); 846 847 memcpy (bp->bp_chaddr, NetOurEther, 6); 848 849 /* 850 * ID is the id of the OFFER packet 851 */ 852 853 NetCopyLong(&bp->bp_id, &bp_offer->bp_id); 854 855 /* 856 * Copy options from OFFER packet if present 857 */ 858 859 /* Copy offered IP into the parameters request list */ 860 NetCopyIP(&OfferedIP, &bp_offer->bp_yiaddr); 861 extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_REQUEST, NetDHCPServerIP, OfferedIP); 862 863 pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; 864 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; 865 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); 866 867 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen); 868 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY 869 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY); 870 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */ 871 NetSendPacket(NetTxPacket, pktlen); 872 } 873 874 /* 875 * Handle DHCP received packets. 876 */ 877 static void 878 DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 879 unsigned len) 880 { 881 Bootp_t *bp = (Bootp_t *)pkt; 882 883 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n", 884 src, dest, len, dhcp_state); 885 886 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ 887 return; 888 889 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n", 890 src, dest, len, dhcp_state); 891 892 switch (dhcp_state) { 893 case SELECTING: 894 /* 895 * Wait an appropriate time for any potential DHCPOFFER packets 896 * to arrive. Then select one, and generate DHCPREQUEST response. 897 * If filename is in format we recognize, assume it is a valid 898 * OFFER from a server we want. 899 */ 900 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file); 901 #ifdef CONFIG_SYS_BOOTFILE_PREFIX 902 if (strncmp(bp->bp_file, 903 CONFIG_SYS_BOOTFILE_PREFIX, 904 strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0 ) { 905 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ 906 907 debug("TRANSITIONING TO REQUESTING STATE\n"); 908 dhcp_state = REQUESTING; 909 910 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 911 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); 912 913 NetSetTimeout(TIMEOUT, BootpTimeout); 914 DhcpSendRequestPkt(bp); 915 #ifdef CONFIG_SYS_BOOTFILE_PREFIX 916 } 917 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ 918 919 return; 920 break; 921 case REQUESTING: 922 debug("DHCP State: REQUESTING\n"); 923 924 if ( DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK ) { 925 char *s; 926 927 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) 928 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); 929 BootpCopyNetParams(bp); /* Store net params from reply */ 930 dhcp_state = BOUND; 931 printf ("DHCP client bound to address %pI4\n", &NetOurIP); 932 933 /* Obey the 'autoload' setting */ 934 if ((s = getenv("autoload")) != NULL) { 935 if (*s == 'n') { 936 /* 937 * Just use BOOTP to configure system; 938 * Do not use TFTP to load the bootfile. 939 */ 940 NetState = NETLOOP_SUCCESS; 941 return; 942 #if defined(CONFIG_CMD_NFS) 943 } else if (strcmp(s, "NFS") == 0) { 944 /* 945 * Use NFS to load the bootfile. 946 */ 947 NfsStart(); 948 return; 949 #endif 950 } 951 } 952 TftpStart(); 953 return; 954 } 955 break; 956 case BOUND: 957 /* DHCP client bound to address */ 958 break; 959 default: 960 puts ("DHCP: INVALID STATE\n"); 961 break; 962 } 963 964 } 965 966 void DhcpRequest(void) 967 { 968 BootpRequest(); 969 } 970 #endif /* CONFIG_CMD_DHCP */ 971