1 /* 2 * Copied from Linux Monitor (LiMon) - Networking. 3 * 4 * Copyright 1994 - 2000 Neil Russell. 5 * (See License) 6 * Copyright 2000 Roland Borde 7 * Copyright 2000 Paolo Scaffardi 8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de 9 */ 10 11 /* 12 * General Desription: 13 * 14 * The user interface supports commands for BOOTP, RARP, and TFTP. 15 * Also, we support ARP internally. Depending on available data, 16 * these interact as follows: 17 * 18 * BOOTP: 19 * 20 * Prerequisites: - own ethernet address 21 * We want: - own IP address 22 * - TFTP server IP address 23 * - name of bootfile 24 * Next step: ARP 25 * 26 * RARP: 27 * 28 * Prerequisites: - own ethernet address 29 * We want: - own IP address 30 * - TFTP server IP address 31 * Next step: ARP 32 * 33 * ARP: 34 * 35 * Prerequisites: - own ethernet address 36 * - own IP address 37 * - TFTP server IP address 38 * We want: - TFTP server ethernet address 39 * Next step: TFTP 40 * 41 * DHCP: 42 * 43 * Prerequisites: - own ethernet address 44 * We want: - IP, Netmask, ServerIP, Gateway IP 45 * - bootfilename, lease time 46 * Next step: - TFTP 47 * 48 * TFTP: 49 * 50 * Prerequisites: - own ethernet address 51 * - own IP address 52 * - TFTP server IP address 53 * - TFTP server ethernet address 54 * - name of bootfile (if unknown, we use a default name 55 * derived from our own IP address) 56 * We want: - load the boot file 57 * Next step: none 58 * 59 * NFS: 60 * 61 * Prerequisites: - own ethernet address 62 * - own IP address 63 * - name of bootfile (if unknown, we use a default name 64 * derived from our own IP address) 65 * We want: - load the boot file 66 * Next step: none 67 * 68 * SNTP: 69 * 70 * Prerequisites: - own ethernet address 71 * - own IP address 72 * We want: - network time 73 * Next step: none 74 */ 75 76 77 #include <common.h> 78 #include <watchdog.h> 79 #include <command.h> 80 #include <net.h> 81 #include "bootp.h" 82 #include "tftp.h" 83 #ifdef CONFIG_CMD_RARP 84 #include "rarp.h" 85 #endif 86 #include "nfs.h" 87 #ifdef CONFIG_STATUS_LED 88 #include <status_led.h> 89 #include <miiphy.h> 90 #endif 91 #if defined(CONFIG_CMD_SNTP) 92 #include "sntp.h" 93 #endif 94 #if defined(CONFIG_CDP_VERSION) 95 #include <timestamp.h> 96 #endif 97 #if defined(CONFIG_CMD_DNS) 98 #include "dns.h" 99 #endif 100 101 DECLARE_GLOBAL_DATA_PTR; 102 103 #ifndef CONFIG_ARP_TIMEOUT 104 /* Milliseconds before trying ARP again */ 105 # define ARP_TIMEOUT 5000UL 106 #else 107 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT 108 #endif 109 110 111 #ifndef CONFIG_NET_RETRY_COUNT 112 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 113 #else 114 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT 115 #endif 116 117 /** BOOTP EXTENTIONS **/ 118 119 /* Our subnet mask (0=unknown) */ 120 IPaddr_t NetOurSubnetMask; 121 /* Our gateways IP address */ 122 IPaddr_t NetOurGatewayIP; 123 /* Our DNS IP address */ 124 IPaddr_t NetOurDNSIP; 125 #if defined(CONFIG_BOOTP_DNS2) 126 /* Our 2nd DNS IP address */ 127 IPaddr_t NetOurDNS2IP; 128 #endif 129 /* Our NIS domain */ 130 char NetOurNISDomain[32] = {0,}; 131 /* Our hostname */ 132 char NetOurHostName[32] = {0,}; 133 /* Our bootpath */ 134 char NetOurRootPath[64] = {0,}; 135 /* Our bootfile size in blocks */ 136 ushort NetBootFileSize; 137 138 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 139 IPaddr_t Mcast_addr; 140 #endif 141 142 /** END OF BOOTP EXTENTIONS **/ 143 144 /* The actual transferred size of the bootfile (in bytes) */ 145 ulong NetBootFileXferSize; 146 /* Our ethernet address */ 147 uchar NetOurEther[6]; 148 /* Boot server enet address */ 149 uchar NetServerEther[6]; 150 /* Our IP addr (0 = unknown) */ 151 IPaddr_t NetOurIP; 152 /* Server IP addr (0 = unknown) */ 153 IPaddr_t NetServerIP; 154 /* Current receive packet */ 155 volatile uchar *NetRxPacket; 156 /* Current rx packet length */ 157 int NetRxPacketLen; 158 /* IP packet ID */ 159 unsigned NetIPID; 160 /* Ethernet bcast address */ 161 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 162 uchar NetEtherNullAddr[6]; 163 #ifdef CONFIG_API 164 void (*push_packet)(volatile void *, int len) = 0; 165 #endif 166 #if defined(CONFIG_CMD_CDP) 167 /* Ethernet bcast address */ 168 uchar NetCDPAddr[6] = { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 169 #endif 170 /* Network loop state */ 171 int NetState; 172 /* Tried all network devices */ 173 int NetRestartWrap; 174 /* Network loop restarted */ 175 static int NetRestarted; 176 /* At least one device configured */ 177 static int NetDevExists; 178 179 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 180 /* default is without VLAN */ 181 ushort NetOurVLAN = 0xFFFF; 182 /* ditto */ 183 ushort NetOurNativeVLAN = 0xFFFF; 184 185 /* Boot File name */ 186 char BootFile[128]; 187 188 #if defined(CONFIG_CMD_PING) 189 /* the ip address to ping */ 190 IPaddr_t NetPingIP; 191 192 static void PingStart(void); 193 #endif 194 195 #if defined(CONFIG_CMD_CDP) 196 static void CDPStart(void); 197 #endif 198 199 #if defined(CONFIG_CMD_SNTP) 200 /* NTP server IP address */ 201 IPaddr_t NetNtpServerIP; 202 /* offset time from UTC */ 203 int NetTimeOffset; 204 #endif 205 206 #ifdef CONFIG_NETCONSOLE 207 void NcStart(void); 208 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 209 #endif 210 211 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 212 213 /* Receive packet */ 214 volatile uchar *NetRxPackets[PKTBUFSRX]; 215 216 /* Current RX packet handler */ 217 static rxhand_f *packetHandler; 218 #ifdef CONFIG_CMD_TFTPPUT 219 static rxhand_icmp_f *packet_icmp_handler; /* Current ICMP rx handler */ 220 #endif 221 /* Current timeout handler */ 222 static thand_f *timeHandler; 223 /* Time base value */ 224 static ulong timeStart; 225 /* Current timeout value */ 226 static ulong timeDelta; 227 /* THE transmit packet */ 228 volatile uchar *NetTxPacket; 229 230 static int net_check_prereq(enum proto_t protocol); 231 232 static int NetTryCount; 233 234 /**********************************************************************/ 235 236 IPaddr_t NetArpWaitPacketIP; 237 IPaddr_t NetArpWaitReplyIP; 238 /* MAC address of waiting packet's destination */ 239 uchar *NetArpWaitPacketMAC; 240 /* THE transmit packet */ 241 uchar *NetArpWaitTxPacket; 242 int NetArpWaitTxPacketSize; 243 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 244 ulong NetArpWaitTimerStart; 245 int NetArpWaitTry; 246 247 void ArpRequest(void) 248 { 249 volatile uchar *pkt; 250 ARP_t *arp; 251 252 debug("ARP broadcast %d\n", NetArpWaitTry); 253 254 pkt = NetTxPacket; 255 256 pkt += NetSetEther(pkt, NetBcastAddr, PROT_ARP); 257 258 arp = (ARP_t *) pkt; 259 260 arp->ar_hrd = htons(ARP_ETHER); 261 arp->ar_pro = htons(PROT_IP); 262 arp->ar_hln = 6; 263 arp->ar_pln = 4; 264 arp->ar_op = htons(ARPOP_REQUEST); 265 266 /* source ET addr */ 267 memcpy(&arp->ar_data[0], NetOurEther, 6); 268 /* source IP addr */ 269 NetWriteIP((uchar *) &arp->ar_data[6], NetOurIP); 270 /* dest ET addr = 0 */ 271 memset(&arp->ar_data[10], '\0', 6); 272 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 273 (NetOurIP & NetOurSubnetMask)) { 274 if (NetOurGatewayIP == 0) { 275 puts("## Warning: gatewayip needed but not set\n"); 276 NetArpWaitReplyIP = NetArpWaitPacketIP; 277 } else { 278 NetArpWaitReplyIP = NetOurGatewayIP; 279 } 280 } else { 281 NetArpWaitReplyIP = NetArpWaitPacketIP; 282 } 283 284 NetWriteIP((uchar *) &arp->ar_data[16], NetArpWaitReplyIP); 285 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 286 } 287 288 void ArpTimeoutCheck(void) 289 { 290 ulong t; 291 292 if (!NetArpWaitPacketIP) 293 return; 294 295 t = get_timer(0); 296 297 /* check for arp timeout */ 298 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) { 299 NetArpWaitTry++; 300 301 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 302 puts("\nARP Retry count exceeded; starting again\n"); 303 NetArpWaitTry = 0; 304 NetStartAgain(); 305 } else { 306 NetArpWaitTimerStart = t; 307 ArpRequest(); 308 } 309 } 310 } 311 312 /* 313 * Check if autoload is enabled. If so, use either NFS or TFTP to download 314 * the boot file. 315 */ 316 void net_auto_load(void) 317 { 318 const char *s = getenv("autoload"); 319 320 if (s != NULL) { 321 if (*s == 'n') { 322 /* 323 * Just use BOOTP/RARP to configure system; 324 * Do not use TFTP to load the bootfile. 325 */ 326 NetState = NETLOOP_SUCCESS; 327 return; 328 } 329 #if defined(CONFIG_CMD_NFS) 330 if (strcmp(s, "NFS") == 0) { 331 /* 332 * Use NFS to load the bootfile. 333 */ 334 NfsStart(); 335 return; 336 } 337 #endif 338 } 339 TftpStart(TFTPGET); 340 } 341 342 static void NetInitLoop(enum proto_t protocol) 343 { 344 static int env_changed_id; 345 bd_t *bd = gd->bd; 346 int env_id = get_env_id(); 347 348 /* update only when the environment has changed */ 349 if (env_changed_id != env_id) { 350 NetOurIP = getenv_IPaddr("ipaddr"); 351 NetCopyIP(&bd->bi_ip_addr, &NetOurIP); 352 NetOurGatewayIP = getenv_IPaddr("gatewayip"); 353 NetOurSubnetMask = getenv_IPaddr("netmask"); 354 NetServerIP = getenv_IPaddr("serverip"); 355 NetOurNativeVLAN = getenv_VLAN("nvlan"); 356 NetOurVLAN = getenv_VLAN("vlan"); 357 #if defined(CONFIG_CMD_DNS) 358 NetOurDNSIP = getenv_IPaddr("dnsip"); 359 #endif 360 env_changed_id = env_id; 361 } 362 363 return; 364 } 365 366 /**********************************************************************/ 367 /* 368 * Main network processing loop. 369 */ 370 371 int NetLoop(enum proto_t protocol) 372 { 373 bd_t *bd = gd->bd; 374 int ret = -1; 375 376 NetRestarted = 0; 377 NetDevExists = 0; 378 379 /* XXX problem with bss workaround */ 380 NetArpWaitPacketMAC = NULL; 381 NetArpWaitTxPacket = NULL; 382 NetArpWaitPacketIP = 0; 383 NetArpWaitReplyIP = 0; 384 NetArpWaitTxPacket = NULL; 385 NetTxPacket = NULL; 386 NetTryCount = 1; 387 388 if (!NetTxPacket) { 389 int i; 390 /* 391 * Setup packet buffers, aligned correctly. 392 */ 393 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 394 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 395 for (i = 0; i < PKTBUFSRX; i++) 396 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 397 } 398 399 if (!NetArpWaitTxPacket) { 400 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 401 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 402 NetArpWaitTxPacketSize = 0; 403 } 404 405 eth_halt(); 406 eth_set_current(); 407 if (eth_init(bd) < 0) { 408 eth_halt(); 409 return -1; 410 } 411 412 restart: 413 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6); 414 415 NetState = NETLOOP_CONTINUE; 416 417 /* 418 * Start the ball rolling with the given start function. From 419 * here on, this code is a state machine driven by received 420 * packets and timer events. 421 */ 422 NetInitLoop(protocol); 423 424 switch (net_check_prereq(protocol)) { 425 case 1: 426 /* network not configured */ 427 eth_halt(); 428 return -1; 429 430 case 2: 431 /* network device not configured */ 432 break; 433 434 case 0: 435 NetDevExists = 1; 436 NetBootFileXferSize = 0; 437 switch (protocol) { 438 case TFTPGET: 439 #ifdef CONFIG_CMD_TFTPPUT 440 case TFTPPUT: 441 #endif 442 /* always use ARP to get server ethernet address */ 443 TftpStart(protocol); 444 break; 445 #ifdef CONFIG_CMD_TFTPSRV 446 case TFTPSRV: 447 TftpStartServer(); 448 break; 449 #endif 450 #if defined(CONFIG_CMD_DHCP) 451 case DHCP: 452 BootpTry = 0; 453 NetOurIP = 0; 454 DhcpRequest(); /* Basically same as BOOTP */ 455 break; 456 #endif 457 458 case BOOTP: 459 BootpTry = 0; 460 NetOurIP = 0; 461 BootpRequest(); 462 break; 463 464 #if defined(CONFIG_CMD_RARP) 465 case RARP: 466 RarpTry = 0; 467 NetOurIP = 0; 468 RarpRequest(); 469 break; 470 #endif 471 #if defined(CONFIG_CMD_PING) 472 case PING: 473 PingStart(); 474 break; 475 #endif 476 #if defined(CONFIG_CMD_NFS) 477 case NFS: 478 NfsStart(); 479 break; 480 #endif 481 #if defined(CONFIG_CMD_CDP) 482 case CDP: 483 CDPStart(); 484 break; 485 #endif 486 #ifdef CONFIG_NETCONSOLE 487 case NETCONS: 488 NcStart(); 489 break; 490 #endif 491 #if defined(CONFIG_CMD_SNTP) 492 case SNTP: 493 SntpStart(); 494 break; 495 #endif 496 #if defined(CONFIG_CMD_DNS) 497 case DNS: 498 DnsStart(); 499 break; 500 #endif 501 default: 502 break; 503 } 504 505 break; 506 } 507 508 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 509 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 510 defined(CONFIG_STATUS_LED) && \ 511 defined(STATUS_LED_RED) 512 /* 513 * Echo the inverted link state to the fault LED. 514 */ 515 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) 516 status_led_set(STATUS_LED_RED, STATUS_LED_OFF); 517 else 518 status_led_set(STATUS_LED_RED, STATUS_LED_ON); 519 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 520 #endif /* CONFIG_MII, ... */ 521 522 /* 523 * Main packet reception loop. Loop receiving packets until 524 * someone sets `NetState' to a state that terminates. 525 */ 526 for (;;) { 527 WATCHDOG_RESET(); 528 #ifdef CONFIG_SHOW_ACTIVITY 529 { 530 extern void show_activity(int arg); 531 show_activity(1); 532 } 533 #endif 534 /* 535 * Check the ethernet for a new packet. The ethernet 536 * receive routine will process it. 537 */ 538 eth_rx(); 539 540 /* 541 * Abort if ctrl-c was pressed. 542 */ 543 if (ctrlc()) { 544 eth_halt(); 545 puts("\nAbort\n"); 546 goto done; 547 } 548 549 ArpTimeoutCheck(); 550 551 /* 552 * Check for a timeout, and run the timeout handler 553 * if we have one. 554 */ 555 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 556 thand_f *x; 557 558 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 559 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 560 defined(CONFIG_STATUS_LED) && \ 561 defined(STATUS_LED_RED) 562 /* 563 * Echo the inverted link state to the fault LED. 564 */ 565 if (miiphy_link(eth_get_dev()->name, 566 CONFIG_SYS_FAULT_MII_ADDR)) { 567 status_led_set(STATUS_LED_RED, STATUS_LED_OFF); 568 } else { 569 status_led_set(STATUS_LED_RED, STATUS_LED_ON); 570 } 571 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 572 #endif /* CONFIG_MII, ... */ 573 x = timeHandler; 574 timeHandler = (thand_f *)0; 575 (*x)(); 576 } 577 578 579 switch (NetState) { 580 581 case NETLOOP_RESTART: 582 NetRestarted = 1; 583 goto restart; 584 585 case NETLOOP_SUCCESS: 586 if (NetBootFileXferSize > 0) { 587 char buf[20]; 588 printf("Bytes transferred = %ld (%lx hex)\n", 589 NetBootFileXferSize, 590 NetBootFileXferSize); 591 sprintf(buf, "%lX", NetBootFileXferSize); 592 setenv("filesize", buf); 593 594 sprintf(buf, "%lX", (unsigned long)load_addr); 595 setenv("fileaddr", buf); 596 } 597 eth_halt(); 598 ret = NetBootFileXferSize; 599 goto done; 600 601 case NETLOOP_FAIL: 602 goto done; 603 } 604 } 605 606 done: 607 #ifdef CONFIG_CMD_TFTPPUT 608 /* Clear out the handlers */ 609 NetSetHandler(NULL); 610 net_set_icmp_handler(NULL); 611 #endif 612 return ret; 613 } 614 615 /**********************************************************************/ 616 617 static void 618 startAgainTimeout(void) 619 { 620 NetState = NETLOOP_RESTART; 621 } 622 623 static void 624 startAgainHandler(uchar *pkt, unsigned dest, IPaddr_t sip, 625 unsigned src, unsigned len) 626 { 627 /* Totally ignore the packet */ 628 } 629 630 void NetStartAgain(void) 631 { 632 char *nretry; 633 int retry_forever = 0; 634 unsigned long retrycnt = 0; 635 636 nretry = getenv("netretry"); 637 if (nretry) { 638 if (!strcmp(nretry, "yes")) 639 retry_forever = 1; 640 else if (!strcmp(nretry, "no")) 641 retrycnt = 0; 642 else if (!strcmp(nretry, "once")) 643 retrycnt = 1; 644 else 645 retrycnt = simple_strtoul(nretry, NULL, 0); 646 } else 647 retry_forever = 1; 648 649 if ((!retry_forever) && (NetTryCount >= retrycnt)) { 650 eth_halt(); 651 NetState = NETLOOP_FAIL; 652 return; 653 } 654 655 NetTryCount++; 656 657 eth_halt(); 658 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 659 eth_try_another(!NetRestarted); 660 #endif 661 eth_init(gd->bd); 662 if (NetRestartWrap) { 663 NetRestartWrap = 0; 664 if (NetDevExists) { 665 NetSetTimeout(10000UL, startAgainTimeout); 666 NetSetHandler(startAgainHandler); 667 } else { 668 NetState = NETLOOP_FAIL; 669 } 670 } else { 671 NetState = NETLOOP_RESTART; 672 } 673 } 674 675 /**********************************************************************/ 676 /* 677 * Miscelaneous bits. 678 */ 679 680 void 681 NetSetHandler(rxhand_f *f) 682 { 683 packetHandler = f; 684 } 685 686 #ifdef CONFIG_CMD_TFTPPUT 687 void net_set_icmp_handler(rxhand_icmp_f *f) 688 { 689 packet_icmp_handler = f; 690 } 691 #endif 692 693 void 694 NetSetTimeout(ulong iv, thand_f *f) 695 { 696 if (iv == 0) { 697 timeHandler = (thand_f *)0; 698 } else { 699 timeHandler = f; 700 timeStart = get_timer(0); 701 timeDelta = iv; 702 } 703 } 704 705 706 void 707 NetSendPacket(volatile uchar *pkt, int len) 708 { 709 (void) eth_send(pkt, len); 710 } 711 712 int 713 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 714 { 715 uchar *pkt; 716 717 /* convert to new style broadcast */ 718 if (dest == 0) 719 dest = 0xFFFFFFFF; 720 721 /* if broadcast, make the ether address a broadcast and don't do ARP */ 722 if (dest == 0xFFFFFFFF) 723 ether = NetBcastAddr; 724 725 /* 726 * if MAC address was not discovered yet, save the packet and do 727 * an ARP request 728 */ 729 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 730 731 debug("sending ARP for %08lx\n", dest); 732 733 NetArpWaitPacketIP = dest; 734 NetArpWaitPacketMAC = ether; 735 736 pkt = NetArpWaitTxPacket; 737 pkt += NetSetEther(pkt, NetArpWaitPacketMAC, PROT_IP); 738 739 NetSetIP(pkt, dest, dport, sport, len); 740 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + 741 (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 742 743 /* size of the waiting packet */ 744 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + 745 IP_HDR_SIZE + len; 746 747 /* and do the ARP request */ 748 NetArpWaitTry = 1; 749 NetArpWaitTimerStart = get_timer(0); 750 ArpRequest(); 751 return 1; /* waiting */ 752 } 753 754 debug("sending UDP to %08lx/%pM\n", dest, ether); 755 756 pkt = (uchar *)NetTxPacket; 757 pkt += NetSetEther(pkt, ether, PROT_IP); 758 NetSetIP(pkt, dest, dport, sport, len); 759 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 760 761 return 0; /* transmitted */ 762 } 763 764 #if defined(CONFIG_CMD_PING) 765 static ushort PingSeqNo; 766 767 int PingSend(void) 768 { 769 static uchar mac[6]; 770 volatile IP_t *ip; 771 volatile ushort *s; 772 uchar *pkt; 773 774 /* XXX always send arp request */ 775 776 memcpy(mac, NetEtherNullAddr, 6); 777 778 debug("sending ARP for %08lx\n", NetPingIP); 779 780 NetArpWaitPacketIP = NetPingIP; 781 NetArpWaitPacketMAC = mac; 782 783 pkt = NetArpWaitTxPacket; 784 pkt += NetSetEther(pkt, mac, PROT_IP); 785 786 ip = (volatile IP_t *)pkt; 787 788 /* 789 * Construct an IP and ICMP header. 790 * (need to set no fragment bit - XXX) 791 */ 792 /* IP_HDR_SIZE / 4 (not including UDP) */ 793 ip->ip_hl_v = 0x45; 794 ip->ip_tos = 0; 795 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 796 ip->ip_id = htons(NetIPID++); 797 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 798 ip->ip_ttl = 255; 799 ip->ip_p = 0x01; /* ICMP */ 800 ip->ip_sum = 0; 801 /* already in network byte order */ 802 NetCopyIP((void *)&ip->ip_src, &NetOurIP); 803 /* - "" - */ 804 NetCopyIP((void *)&ip->ip_dst, &NetPingIP); 805 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 806 807 s = &ip->udp_src; /* XXX ICMP starts here */ 808 s[0] = htons(0x0800); /* echo-request, code */ 809 s[1] = 0; /* checksum */ 810 s[2] = 0; /* identifier */ 811 s[3] = htons(PingSeqNo++); /* sequence number */ 812 s[1] = ~NetCksum((uchar *)s, 8/2); 813 814 /* size of the waiting packet */ 815 NetArpWaitTxPacketSize = 816 (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 817 818 /* and do the ARP request */ 819 NetArpWaitTry = 1; 820 NetArpWaitTimerStart = get_timer(0); 821 ArpRequest(); 822 return 1; /* waiting */ 823 } 824 825 static void 826 PingTimeout(void) 827 { 828 eth_halt(); 829 NetState = NETLOOP_FAIL; /* we did not get the reply */ 830 } 831 832 static void 833 PingHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 834 unsigned len) 835 { 836 if (sip != NetPingIP) 837 return; 838 839 NetState = NETLOOP_SUCCESS; 840 } 841 842 static void PingStart(void) 843 { 844 printf("Using %s device\n", eth_get_name()); 845 NetSetTimeout(10000UL, PingTimeout); 846 NetSetHandler(PingHandler); 847 848 PingSend(); 849 } 850 #endif 851 852 #if defined(CONFIG_CMD_CDP) 853 854 #define CDP_DEVICE_ID_TLV 0x0001 855 #define CDP_ADDRESS_TLV 0x0002 856 #define CDP_PORT_ID_TLV 0x0003 857 #define CDP_CAPABILITIES_TLV 0x0004 858 #define CDP_VERSION_TLV 0x0005 859 #define CDP_PLATFORM_TLV 0x0006 860 #define CDP_NATIVE_VLAN_TLV 0x000a 861 #define CDP_APPLIANCE_VLAN_TLV 0x000e 862 #define CDP_TRIGGER_TLV 0x000f 863 #define CDP_POWER_CONSUMPTION_TLV 0x0010 864 #define CDP_SYSNAME_TLV 0x0014 865 #define CDP_SYSOBJECT_TLV 0x0015 866 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 867 868 #define CDP_TIMEOUT 250UL /* one packet every 250ms */ 869 870 static int CDPSeq; 871 static int CDPOK; 872 873 ushort CDPNativeVLAN; 874 ushort CDPApplianceVLAN; 875 876 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 877 0x00 }; 878 879 static ushort CDP_compute_csum(const uchar *buff, ushort len) 880 { 881 ushort csum; 882 int odd; 883 ulong result = 0; 884 ushort leftover; 885 ushort *p; 886 887 if (len > 0) { 888 odd = 1 & (ulong)buff; 889 if (odd) { 890 result = *buff << 8; 891 len--; 892 buff++; 893 } 894 while (len > 1) { 895 p = (ushort *)buff; 896 result += *p++; 897 buff = (uchar *)p; 898 if (result & 0x80000000) 899 result = (result & 0xFFFF) + (result >> 16); 900 len -= 2; 901 } 902 if (len) { 903 leftover = (signed short)(*(const signed char *)buff); 904 /* CISCO SUCKS big time! (and blows too): 905 * CDP uses the IP checksum algorithm with a twist; 906 * for the last byte it *sign* extends and sums. 907 */ 908 result = (result & 0xffff0000) | 909 ((result + leftover) & 0x0000ffff); 910 } 911 while (result >> 16) 912 result = (result & 0xFFFF) + (result >> 16); 913 914 if (odd) 915 result = ((result >> 8) & 0xff) | 916 ((result & 0xff) << 8); 917 } 918 919 /* add up 16-bit and 17-bit words for 17+c bits */ 920 result = (result & 0xffff) + (result >> 16); 921 /* add up 16-bit and 2-bit for 16+c bit */ 922 result = (result & 0xffff) + (result >> 16); 923 /* add up carry.. */ 924 result = (result & 0xffff) + (result >> 16); 925 926 /* negate */ 927 csum = ~(ushort)result; 928 929 /* run time endian detection */ 930 if (csum != htons(csum)) /* little endian */ 931 csum = htons(csum); 932 933 return csum; 934 } 935 936 int CDPSendTrigger(void) 937 { 938 volatile uchar *pkt; 939 volatile ushort *s; 940 volatile ushort *cp; 941 Ethernet_t *et; 942 int len; 943 ushort chksum; 944 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 945 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 946 char buf[32]; 947 #endif 948 949 pkt = NetTxPacket; 950 et = (Ethernet_t *)pkt; 951 952 /* NOTE: trigger sent not on any VLAN */ 953 954 /* form ethernet header */ 955 memcpy(et->et_dest, NetCDPAddr, 6); 956 memcpy(et->et_src, NetOurEther, 6); 957 958 pkt += ETHER_HDR_SIZE; 959 960 /* SNAP header */ 961 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 962 pkt += sizeof(CDP_SNAP_hdr); 963 964 /* CDP header */ 965 *pkt++ = 0x02; /* CDP version 2 */ 966 *pkt++ = 180; /* TTL */ 967 s = (volatile ushort *)pkt; 968 cp = s; 969 /* checksum (0 for later calculation) */ 970 *s++ = htons(0); 971 972 /* CDP fields */ 973 #ifdef CONFIG_CDP_DEVICE_ID 974 *s++ = htons(CDP_DEVICE_ID_TLV); 975 *s++ = htons(CONFIG_CDP_DEVICE_ID); 976 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther); 977 memcpy((uchar *)s, buf, 16); 978 s += 16 / 2; 979 #endif 980 981 #ifdef CONFIG_CDP_PORT_ID 982 *s++ = htons(CDP_PORT_ID_TLV); 983 memset(buf, 0, sizeof(buf)); 984 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 985 len = strlen(buf); 986 if (len & 1) /* make it even */ 987 len++; 988 *s++ = htons(len + 4); 989 memcpy((uchar *)s, buf, len); 990 s += len / 2; 991 #endif 992 993 #ifdef CONFIG_CDP_CAPABILITIES 994 *s++ = htons(CDP_CAPABILITIES_TLV); 995 *s++ = htons(8); 996 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 997 s += 2; 998 #endif 999 1000 #ifdef CONFIG_CDP_VERSION 1001 *s++ = htons(CDP_VERSION_TLV); 1002 memset(buf, 0, sizeof(buf)); 1003 strcpy(buf, CONFIG_CDP_VERSION); 1004 len = strlen(buf); 1005 if (len & 1) /* make it even */ 1006 len++; 1007 *s++ = htons(len + 4); 1008 memcpy((uchar *)s, buf, len); 1009 s += len / 2; 1010 #endif 1011 1012 #ifdef CONFIG_CDP_PLATFORM 1013 *s++ = htons(CDP_PLATFORM_TLV); 1014 memset(buf, 0, sizeof(buf)); 1015 strcpy(buf, CONFIG_CDP_PLATFORM); 1016 len = strlen(buf); 1017 if (len & 1) /* make it even */ 1018 len++; 1019 *s++ = htons(len + 4); 1020 memcpy((uchar *)s, buf, len); 1021 s += len / 2; 1022 #endif 1023 1024 #ifdef CONFIG_CDP_TRIGGER 1025 *s++ = htons(CDP_TRIGGER_TLV); 1026 *s++ = htons(8); 1027 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 1028 s += 2; 1029 #endif 1030 1031 #ifdef CONFIG_CDP_POWER_CONSUMPTION 1032 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 1033 *s++ = htons(6); 1034 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 1035 #endif 1036 1037 /* length of ethernet packet */ 1038 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 1039 et->et_protlen = htons(len); 1040 1041 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 1042 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, 1043 (uchar *)s - (NetTxPacket + len)); 1044 if (chksum == 0) 1045 chksum = 0xFFFF; 1046 *cp = htons(chksum); 1047 1048 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 1049 return 0; 1050 } 1051 1052 static void 1053 CDPTimeout(void) 1054 { 1055 CDPSeq++; 1056 1057 if (CDPSeq < 3) { 1058 NetSetTimeout(CDP_TIMEOUT, CDPTimeout); 1059 CDPSendTrigger(); 1060 return; 1061 } 1062 1063 /* if not OK try again */ 1064 if (!CDPOK) 1065 NetStartAgain(); 1066 else 1067 NetState = NETLOOP_SUCCESS; 1068 } 1069 1070 static void 1071 CDPDummyHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, 1072 unsigned len) 1073 { 1074 /* nothing */ 1075 } 1076 1077 static void 1078 CDPHandler(const uchar *pkt, unsigned len) 1079 { 1080 const uchar *t; 1081 const ushort *ss; 1082 ushort type, tlen; 1083 uchar applid; 1084 ushort vlan, nvlan; 1085 1086 /* minimum size? */ 1087 if (len < sizeof(CDP_SNAP_hdr) + 4) 1088 goto pkt_short; 1089 1090 /* check for valid CDP SNAP header */ 1091 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1092 return; 1093 1094 pkt += sizeof(CDP_SNAP_hdr); 1095 len -= sizeof(CDP_SNAP_hdr); 1096 1097 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1098 if (pkt[0] < 0x02 || pkt[1] == 0) 1099 return; 1100 1101 /* 1102 * if version is greater than 0x02 maybe we'll have a problem; 1103 * output a warning 1104 */ 1105 if (pkt[0] != 0x02) 1106 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1107 pkt[0] & 0xff); 1108 1109 if (CDP_compute_csum(pkt, len) != 0) 1110 return; 1111 1112 pkt += 4; 1113 len -= 4; 1114 1115 vlan = htons(-1); 1116 nvlan = htons(-1); 1117 while (len > 0) { 1118 if (len < 4) 1119 goto pkt_short; 1120 1121 ss = (const ushort *)pkt; 1122 type = ntohs(ss[0]); 1123 tlen = ntohs(ss[1]); 1124 if (tlen > len) 1125 goto pkt_short; 1126 1127 pkt += tlen; 1128 len -= tlen; 1129 1130 ss += 2; /* point ss to the data of the TLV */ 1131 tlen -= 4; 1132 1133 switch (type) { 1134 case CDP_DEVICE_ID_TLV: 1135 break; 1136 case CDP_ADDRESS_TLV: 1137 break; 1138 case CDP_PORT_ID_TLV: 1139 break; 1140 case CDP_CAPABILITIES_TLV: 1141 break; 1142 case CDP_VERSION_TLV: 1143 break; 1144 case CDP_PLATFORM_TLV: 1145 break; 1146 case CDP_NATIVE_VLAN_TLV: 1147 nvlan = *ss; 1148 break; 1149 case CDP_APPLIANCE_VLAN_TLV: 1150 t = (const uchar *)ss; 1151 while (tlen > 0) { 1152 if (tlen < 3) 1153 goto pkt_short; 1154 1155 applid = t[0]; 1156 ss = (const ushort *)(t + 1); 1157 1158 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1159 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1160 vlan = *ss; 1161 #else 1162 /* XXX will this work; dunno */ 1163 vlan = ntohs(*ss); 1164 #endif 1165 t += 3; tlen -= 3; 1166 } 1167 break; 1168 case CDP_TRIGGER_TLV: 1169 break; 1170 case CDP_POWER_CONSUMPTION_TLV: 1171 break; 1172 case CDP_SYSNAME_TLV: 1173 break; 1174 case CDP_SYSOBJECT_TLV: 1175 break; 1176 case CDP_MANAGEMENT_ADDRESS_TLV: 1177 break; 1178 } 1179 } 1180 1181 CDPApplianceVLAN = vlan; 1182 CDPNativeVLAN = nvlan; 1183 1184 CDPOK = 1; 1185 return; 1186 1187 pkt_short: 1188 printf("** CDP packet is too short\n"); 1189 return; 1190 } 1191 1192 static void CDPStart(void) 1193 { 1194 printf("Using %s device\n", eth_get_name()); 1195 CDPSeq = 0; 1196 CDPOK = 0; 1197 1198 CDPNativeVLAN = htons(-1); 1199 CDPApplianceVLAN = htons(-1); 1200 1201 NetSetTimeout(CDP_TIMEOUT, CDPTimeout); 1202 NetSetHandler(CDPDummyHandler); 1203 1204 CDPSendTrigger(); 1205 } 1206 #endif 1207 1208 #ifdef CONFIG_IP_DEFRAG 1209 /* 1210 * This function collects fragments in a single packet, according 1211 * to the algorithm in RFC815. It returns NULL or the pointer to 1212 * a complete packet, in static storage 1213 */ 1214 #ifndef CONFIG_NET_MAXDEFRAG 1215 #define CONFIG_NET_MAXDEFRAG 16384 1216 #endif 1217 /* 1218 * MAXDEFRAG, above, is chosen in the config file and is real data 1219 * so we need to add the NFS overhead, which is more than TFTP. 1220 * To use sizeof in the internal unnamed structures, we need a real 1221 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately). 1222 * The compiler doesn't complain nor allocates the actual structure 1223 */ 1224 static struct rpc_t rpc_specimen; 1225 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply)) 1226 1227 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP) 1228 1229 /* 1230 * this is the packet being assembled, either data or frag control. 1231 * Fragments go by 8 bytes, so this union must be 8 bytes long 1232 */ 1233 struct hole { 1234 /* first_byte is address of this structure */ 1235 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */ 1236 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */ 1237 u16 prev_hole; /* index of prev, 0 == none */ 1238 u16 unused; 1239 }; 1240 1241 static IP_t *__NetDefragment(IP_t *ip, int *lenp) 1242 { 1243 static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN))); 1244 static u16 first_hole, total_len; 1245 struct hole *payload, *thisfrag, *h, *newh; 1246 IP_t *localip = (IP_t *)pkt_buff; 1247 uchar *indata = (uchar *)ip; 1248 int offset8, start, len, done = 0; 1249 u16 ip_off = ntohs(ip->ip_off); 1250 1251 /* payload starts after IP header, this fragment is in there */ 1252 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP); 1253 offset8 = (ip_off & IP_OFFS); 1254 thisfrag = payload + offset8; 1255 start = offset8 * 8; 1256 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP; 1257 1258 if (start + len > IP_MAXUDP) /* fragment extends too far */ 1259 return NULL; 1260 1261 if (!total_len || localip->ip_id != ip->ip_id) { 1262 /* new (or different) packet, reset structs */ 1263 total_len = 0xffff; 1264 payload[0].last_byte = ~0; 1265 payload[0].next_hole = 0; 1266 payload[0].prev_hole = 0; 1267 first_hole = 0; 1268 /* any IP header will work, copy the first we received */ 1269 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP); 1270 } 1271 1272 /* 1273 * What follows is the reassembly algorithm. We use the payload 1274 * array as a linked list of hole descriptors, as each hole starts 1275 * at a multiple of 8 bytes. However, last byte can be whatever value, 1276 * so it is represented as byte count, not as 8-byte blocks. 1277 */ 1278 1279 h = payload + first_hole; 1280 while (h->last_byte < start) { 1281 if (!h->next_hole) { 1282 /* no hole that far away */ 1283 return NULL; 1284 } 1285 h = payload + h->next_hole; 1286 } 1287 1288 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */ 1289 if (offset8 + ((len + 7) / 8) <= h - payload) { 1290 /* no overlap with holes (dup fragment?) */ 1291 return NULL; 1292 } 1293 1294 if (!(ip_off & IP_FLAGS_MFRAG)) { 1295 /* no more fragmentss: truncate this (last) hole */ 1296 total_len = start + len; 1297 h->last_byte = start + len; 1298 } 1299 1300 /* 1301 * There is some overlap: fix the hole list. This code doesn't 1302 * deal with a fragment that overlaps with two different holes 1303 * (thus being a superset of a previously-received fragment). 1304 */ 1305 1306 if ((h >= thisfrag) && (h->last_byte <= start + len)) { 1307 /* complete overlap with hole: remove hole */ 1308 if (!h->prev_hole && !h->next_hole) { 1309 /* last remaining hole */ 1310 done = 1; 1311 } else if (!h->prev_hole) { 1312 /* first hole */ 1313 first_hole = h->next_hole; 1314 payload[h->next_hole].prev_hole = 0; 1315 } else if (!h->next_hole) { 1316 /* last hole */ 1317 payload[h->prev_hole].next_hole = 0; 1318 } else { 1319 /* in the middle of the list */ 1320 payload[h->next_hole].prev_hole = h->prev_hole; 1321 payload[h->prev_hole].next_hole = h->next_hole; 1322 } 1323 1324 } else if (h->last_byte <= start + len) { 1325 /* overlaps with final part of the hole: shorten this hole */ 1326 h->last_byte = start; 1327 1328 } else if (h >= thisfrag) { 1329 /* overlaps with initial part of the hole: move this hole */ 1330 newh = thisfrag + (len / 8); 1331 *newh = *h; 1332 h = newh; 1333 if (h->next_hole) 1334 payload[h->next_hole].prev_hole = (h - payload); 1335 if (h->prev_hole) 1336 payload[h->prev_hole].next_hole = (h - payload); 1337 else 1338 first_hole = (h - payload); 1339 1340 } else { 1341 /* fragment sits in the middle: split the hole */ 1342 newh = thisfrag + (len / 8); 1343 *newh = *h; 1344 h->last_byte = start; 1345 h->next_hole = (newh - payload); 1346 newh->prev_hole = (h - payload); 1347 if (newh->next_hole) 1348 payload[newh->next_hole].prev_hole = (newh - payload); 1349 } 1350 1351 /* finally copy this fragment and possibly return whole packet */ 1352 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len); 1353 if (!done) 1354 return NULL; 1355 1356 localip->ip_len = htons(total_len); 1357 *lenp = total_len + IP_HDR_SIZE_NO_UDP; 1358 return localip; 1359 } 1360 1361 static inline IP_t *NetDefragment(IP_t *ip, int *lenp) 1362 { 1363 u16 ip_off = ntohs(ip->ip_off); 1364 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 1365 return ip; /* not a fragment */ 1366 return __NetDefragment(ip, lenp); 1367 } 1368 1369 #else /* !CONFIG_IP_DEFRAG */ 1370 1371 static inline IP_t *NetDefragment(IP_t *ip, int *lenp) 1372 { 1373 u16 ip_off = ntohs(ip->ip_off); 1374 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 1375 return ip; /* not a fragment */ 1376 return NULL; 1377 } 1378 #endif 1379 1380 /** 1381 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently 1382 * drop others. 1383 * 1384 * @parma ip IP packet containing the ICMP 1385 */ 1386 static void receive_icmp(IP_t *ip, int len, IPaddr_t src_ip, Ethernet_t *et) 1387 { 1388 ICMP_t *icmph = (ICMP_t *)&ip->udp_src; 1389 1390 switch (icmph->type) { 1391 case ICMP_REDIRECT: 1392 if (icmph->code != ICMP_REDIR_HOST) 1393 return; 1394 printf(" ICMP Host Redirect to %pI4 ", 1395 &icmph->un.gateway); 1396 break; 1397 #if defined(CONFIG_CMD_PING) 1398 case ICMP_ECHO_REPLY: 1399 /* 1400 * IP header OK. Pass the packet to the 1401 * current handler. 1402 */ 1403 /* 1404 * XXX point to ip packet - should this use 1405 * packet_icmp_handler? 1406 */ 1407 (*packetHandler)((uchar *)ip, 0, src_ip, 0, 0); 1408 break; 1409 case ICMP_ECHO_REQUEST: 1410 debug("Got ICMP ECHO REQUEST, return %d bytes\n", 1411 ETHER_HDR_SIZE + len); 1412 1413 memcpy(&et->et_dest[0], &et->et_src[0], 6); 1414 memcpy(&et->et_src[0], NetOurEther, 6); 1415 1416 ip->ip_sum = 0; 1417 ip->ip_off = 0; 1418 NetCopyIP((void *)&ip->ip_dst, &ip->ip_src); 1419 NetCopyIP((void *)&ip->ip_src, &NetOurIP); 1420 ip->ip_sum = ~NetCksum((uchar *)ip, 1421 IP_HDR_SIZE_NO_UDP >> 1); 1422 1423 icmph->type = ICMP_ECHO_REPLY; 1424 icmph->checksum = 0; 1425 icmph->checksum = ~NetCksum((uchar *)icmph, 1426 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1427 (void) eth_send((uchar *)et, 1428 ETHER_HDR_SIZE + len); 1429 break; 1430 #endif 1431 default: 1432 #ifdef CONFIG_CMD_TFTPPUT 1433 if (packet_icmp_handler) 1434 packet_icmp_handler(icmph->type, icmph->code, 1435 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src), 1436 icmph->un.data, ntohs(ip->udp_len)); 1437 #endif 1438 break; 1439 } 1440 } 1441 1442 void 1443 NetReceive(volatile uchar *inpkt, int len) 1444 { 1445 Ethernet_t *et; 1446 IP_t *ip; 1447 ARP_t *arp; 1448 IPaddr_t tmp; 1449 IPaddr_t src_ip; 1450 int x; 1451 uchar *pkt; 1452 #if defined(CONFIG_CMD_CDP) 1453 int iscdp; 1454 #endif 1455 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1456 1457 debug("packet received\n"); 1458 1459 NetRxPacket = inpkt; 1460 NetRxPacketLen = len; 1461 et = (Ethernet_t *)inpkt; 1462 1463 /* too small packet? */ 1464 if (len < ETHER_HDR_SIZE) 1465 return; 1466 1467 #ifdef CONFIG_API 1468 if (push_packet) { 1469 (*push_packet)(inpkt, len); 1470 return; 1471 } 1472 #endif 1473 1474 #if defined(CONFIG_CMD_CDP) 1475 /* keep track if packet is CDP */ 1476 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1477 #endif 1478 1479 myvlanid = ntohs(NetOurVLAN); 1480 if (myvlanid == (ushort)-1) 1481 myvlanid = VLAN_NONE; 1482 mynvlanid = ntohs(NetOurNativeVLAN); 1483 if (mynvlanid == (ushort)-1) 1484 mynvlanid = VLAN_NONE; 1485 1486 x = ntohs(et->et_protlen); 1487 1488 debug("packet received\n"); 1489 1490 if (x < 1514) { 1491 /* 1492 * Got a 802 packet. Check the other protocol field. 1493 */ 1494 x = ntohs(et->et_prot); 1495 1496 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1497 len -= E802_HDR_SIZE; 1498 1499 } else if (x != PROT_VLAN) { /* normal packet */ 1500 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1501 len -= ETHER_HDR_SIZE; 1502 1503 } else { /* VLAN packet */ 1504 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1505 1506 debug("VLAN packet received\n"); 1507 1508 /* too small packet? */ 1509 if (len < VLAN_ETHER_HDR_SIZE) 1510 return; 1511 1512 /* if no VLAN active */ 1513 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1514 #if defined(CONFIG_CMD_CDP) 1515 && iscdp == 0 1516 #endif 1517 ) 1518 return; 1519 1520 cti = ntohs(vet->vet_tag); 1521 vlanid = cti & VLAN_IDMASK; 1522 x = ntohs(vet->vet_type); 1523 1524 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1525 len -= VLAN_ETHER_HDR_SIZE; 1526 } 1527 1528 debug("Receive from protocol 0x%x\n", x); 1529 1530 #if defined(CONFIG_CMD_CDP) 1531 if (iscdp) { 1532 CDPHandler((uchar *)ip, len); 1533 return; 1534 } 1535 #endif 1536 1537 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1538 if (vlanid == VLAN_NONE) 1539 vlanid = (mynvlanid & VLAN_IDMASK); 1540 /* not matched? */ 1541 if (vlanid != (myvlanid & VLAN_IDMASK)) 1542 return; 1543 } 1544 1545 switch (x) { 1546 1547 case PROT_ARP: 1548 /* 1549 * We have to deal with two types of ARP packets: 1550 * - REQUEST packets will be answered by sending our 1551 * IP address - if we know it. 1552 * - REPLY packates are expected only after we asked 1553 * for the TFTP server's or the gateway's ethernet 1554 * address; so if we receive such a packet, we set 1555 * the server ethernet address 1556 */ 1557 debug("Got ARP\n"); 1558 1559 arp = (ARP_t *)ip; 1560 if (len < ARP_HDR_SIZE) { 1561 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1562 return; 1563 } 1564 if (ntohs(arp->ar_hrd) != ARP_ETHER) 1565 return; 1566 if (ntohs(arp->ar_pro) != PROT_IP) 1567 return; 1568 if (arp->ar_hln != 6) 1569 return; 1570 if (arp->ar_pln != 4) 1571 return; 1572 1573 if (NetOurIP == 0) 1574 return; 1575 1576 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) 1577 return; 1578 1579 switch (ntohs(arp->ar_op)) { 1580 case ARPOP_REQUEST: 1581 /* reply with our IP address */ 1582 debug("Got ARP REQUEST, return our IP\n"); 1583 pkt = (uchar *)et; 1584 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1585 arp->ar_op = htons(ARPOP_REPLY); 1586 memcpy(&arp->ar_data[10], &arp->ar_data[0], 6); 1587 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1588 memcpy(&arp->ar_data[0], NetOurEther, 6); 1589 NetCopyIP(&arp->ar_data[6], &NetOurIP); 1590 (void) eth_send((uchar *)et, 1591 (pkt - (uchar *)et) + ARP_HDR_SIZE); 1592 return; 1593 1594 case ARPOP_REPLY: /* arp reply */ 1595 /* are we waiting for a reply */ 1596 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1597 break; 1598 1599 #ifdef CONFIG_KEEP_SERVERADDR 1600 if (NetServerIP == NetArpWaitPacketIP) { 1601 char buf[20]; 1602 sprintf(buf, "%pM", arp->ar_data); 1603 setenv("serveraddr", buf); 1604 } 1605 #endif 1606 1607 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n", 1608 arp->ar_data); 1609 1610 tmp = NetReadIP(&arp->ar_data[6]); 1611 1612 /* matched waiting packet's address */ 1613 if (tmp == NetArpWaitReplyIP) { 1614 debug("Got it\n"); 1615 /* save address for later use */ 1616 memcpy(NetArpWaitPacketMAC, 1617 &arp->ar_data[0], 6); 1618 1619 #ifdef CONFIG_NETCONSOLE 1620 (*packetHandler)(0, 0, 0, 0, 0); 1621 #endif 1622 /* modify header, and transmit it */ 1623 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1624 (void) eth_send(NetArpWaitTxPacket, 1625 NetArpWaitTxPacketSize); 1626 1627 /* no arp request pending now */ 1628 NetArpWaitPacketIP = 0; 1629 NetArpWaitTxPacketSize = 0; 1630 NetArpWaitPacketMAC = NULL; 1631 1632 } 1633 return; 1634 default: 1635 debug("Unexpected ARP opcode 0x%x\n", 1636 ntohs(arp->ar_op)); 1637 return; 1638 } 1639 break; 1640 1641 #ifdef CONFIG_CMD_RARP 1642 case PROT_RARP: 1643 debug("Got RARP\n"); 1644 arp = (ARP_t *)ip; 1645 if (len < ARP_HDR_SIZE) { 1646 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1647 return; 1648 } 1649 1650 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1651 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1652 (ntohs(arp->ar_pro) != PROT_IP) || 1653 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1654 1655 puts("invalid RARP header\n"); 1656 } else { 1657 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1658 if (NetServerIP == 0) 1659 NetCopyIP(&NetServerIP, &arp->ar_data[6]); 1660 memcpy(NetServerEther, &arp->ar_data[0], 6); 1661 1662 (*packetHandler)(0, 0, 0, 0, 0); 1663 } 1664 break; 1665 #endif 1666 case PROT_IP: 1667 debug("Got IP\n"); 1668 /* Before we start poking the header, make sure it is there */ 1669 if (len < IP_HDR_SIZE) { 1670 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE); 1671 return; 1672 } 1673 /* Check the packet length */ 1674 if (len < ntohs(ip->ip_len)) { 1675 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1676 return; 1677 } 1678 len = ntohs(ip->ip_len); 1679 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1680 1681 /* Can't deal with anything except IPv4 */ 1682 if ((ip->ip_hl_v & 0xf0) != 0x40) 1683 return; 1684 /* Can't deal with IP options (headers != 20 bytes) */ 1685 if ((ip->ip_hl_v & 0x0f) > 0x05) 1686 return; 1687 /* Check the Checksum of the header */ 1688 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1689 puts("checksum bad\n"); 1690 return; 1691 } 1692 /* If it is not for us, ignore it */ 1693 tmp = NetReadIP(&ip->ip_dst); 1694 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1695 #ifdef CONFIG_MCAST_TFTP 1696 if (Mcast_addr != tmp) 1697 #endif 1698 return; 1699 } 1700 /* Read source IP address for later use */ 1701 src_ip = NetReadIP(&ip->ip_src); 1702 /* 1703 * The function returns the unchanged packet if it's not 1704 * a fragment, and either the complete packet or NULL if 1705 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL) 1706 */ 1707 ip = NetDefragment(ip, &len); 1708 if (!ip) 1709 return; 1710 /* 1711 * watch for ICMP host redirects 1712 * 1713 * There is no real handler code (yet). We just watch 1714 * for ICMP host redirect messages. In case anybody 1715 * sees these messages: please contact me 1716 * (wd@denx.de), or - even better - send me the 1717 * necessary fixes :-) 1718 * 1719 * Note: in all cases where I have seen this so far 1720 * it was a problem with the router configuration, 1721 * for instance when a router was configured in the 1722 * BOOTP reply, but the TFTP server was on the same 1723 * subnet. So this is probably a warning that your 1724 * configuration might be wrong. But I'm not really 1725 * sure if there aren't any other situations. 1726 * 1727 * Simon Glass <sjg@chromium.org>: We get an ICMP when 1728 * we send a tftp packet to a dead connection, or when 1729 * there is no server at the other end. 1730 */ 1731 if (ip->ip_p == IPPROTO_ICMP) { 1732 receive_icmp(ip, len, src_ip, et); 1733 return; 1734 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1735 return; 1736 } 1737 1738 #ifdef CONFIG_UDP_CHECKSUM 1739 if (ip->udp_xsum != 0) { 1740 ulong xsum; 1741 ushort *sumptr; 1742 ushort sumlen; 1743 1744 xsum = ip->ip_p; 1745 xsum += (ntohs(ip->udp_len)); 1746 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1747 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1748 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1749 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1750 1751 sumlen = ntohs(ip->udp_len); 1752 sumptr = (ushort *) &(ip->udp_src); 1753 1754 while (sumlen > 1) { 1755 ushort sumdata; 1756 1757 sumdata = *sumptr++; 1758 xsum += ntohs(sumdata); 1759 sumlen -= 2; 1760 } 1761 if (sumlen > 0) { 1762 ushort sumdata; 1763 1764 sumdata = *(unsigned char *) sumptr; 1765 sumdata = (sumdata << 8) & 0xff00; 1766 xsum += sumdata; 1767 } 1768 while ((xsum >> 16) != 0) { 1769 xsum = (xsum & 0x0000ffff) + 1770 ((xsum >> 16) & 0x0000ffff); 1771 } 1772 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1773 printf(" UDP wrong checksum %08lx %08x\n", 1774 xsum, ntohs(ip->udp_xsum)); 1775 return; 1776 } 1777 } 1778 #endif 1779 1780 1781 #ifdef CONFIG_NETCONSOLE 1782 nc_input_packet((uchar *)ip + IP_HDR_SIZE, 1783 ntohs(ip->udp_dst), 1784 ntohs(ip->udp_src), 1785 ntohs(ip->udp_len) - 8); 1786 #endif 1787 /* 1788 * IP header OK. Pass the packet to the current handler. 1789 */ 1790 (*packetHandler)((uchar *)ip + IP_HDR_SIZE, 1791 ntohs(ip->udp_dst), 1792 src_ip, 1793 ntohs(ip->udp_src), 1794 ntohs(ip->udp_len) - 8); 1795 break; 1796 } 1797 } 1798 1799 1800 /**********************************************************************/ 1801 1802 static int net_check_prereq(enum proto_t protocol) 1803 { 1804 switch (protocol) { 1805 /* Fall through */ 1806 #if defined(CONFIG_CMD_PING) 1807 case PING: 1808 if (NetPingIP == 0) { 1809 puts("*** ERROR: ping address not given\n"); 1810 return 1; 1811 } 1812 goto common; 1813 #endif 1814 #if defined(CONFIG_CMD_SNTP) 1815 case SNTP: 1816 if (NetNtpServerIP == 0) { 1817 puts("*** ERROR: NTP server address not given\n"); 1818 return 1; 1819 } 1820 goto common; 1821 #endif 1822 #if defined(CONFIG_CMD_DNS) 1823 case DNS: 1824 if (NetOurDNSIP == 0) { 1825 puts("*** ERROR: DNS server address not given\n"); 1826 return 1; 1827 } 1828 goto common; 1829 #endif 1830 #if defined(CONFIG_CMD_NFS) 1831 case NFS: 1832 #endif 1833 case TFTPGET: 1834 case TFTPPUT: 1835 if (NetServerIP == 0) { 1836 puts("*** ERROR: `serverip' not set\n"); 1837 return 1; 1838 } 1839 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \ 1840 defined(CONFIG_CMD_DNS) 1841 common: 1842 #endif 1843 /* Fall through */ 1844 1845 case NETCONS: 1846 case TFTPSRV: 1847 if (NetOurIP == 0) { 1848 puts("*** ERROR: `ipaddr' not set\n"); 1849 return 1; 1850 } 1851 /* Fall through */ 1852 1853 #ifdef CONFIG_CMD_RARP 1854 case RARP: 1855 #endif 1856 case BOOTP: 1857 case CDP: 1858 case DHCP: 1859 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1860 extern int eth_get_dev_index(void); 1861 int num = eth_get_dev_index(); 1862 1863 switch (num) { 1864 case -1: 1865 puts("*** ERROR: No ethernet found.\n"); 1866 return 1; 1867 case 0: 1868 puts("*** ERROR: `ethaddr' not set\n"); 1869 break; 1870 default: 1871 printf("*** ERROR: `eth%daddr' not set\n", 1872 num); 1873 break; 1874 } 1875 1876 NetStartAgain(); 1877 return 2; 1878 } 1879 /* Fall through */ 1880 default: 1881 return 0; 1882 } 1883 return 0; /* OK */ 1884 } 1885 /**********************************************************************/ 1886 1887 int 1888 NetCksumOk(uchar *ptr, int len) 1889 { 1890 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1891 } 1892 1893 1894 unsigned 1895 NetCksum(uchar *ptr, int len) 1896 { 1897 ulong xsum; 1898 ushort *p = (ushort *)ptr; 1899 1900 xsum = 0; 1901 while (len-- > 0) 1902 xsum += *p++; 1903 xsum = (xsum & 0xffff) + (xsum >> 16); 1904 xsum = (xsum & 0xffff) + (xsum >> 16); 1905 return xsum & 0xffff; 1906 } 1907 1908 int 1909 NetEthHdrSize(void) 1910 { 1911 ushort myvlanid; 1912 1913 myvlanid = ntohs(NetOurVLAN); 1914 if (myvlanid == (ushort)-1) 1915 myvlanid = VLAN_NONE; 1916 1917 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : 1918 VLAN_ETHER_HDR_SIZE; 1919 } 1920 1921 int 1922 NetSetEther(volatile uchar *xet, uchar * addr, uint prot) 1923 { 1924 Ethernet_t *et = (Ethernet_t *)xet; 1925 ushort myvlanid; 1926 1927 myvlanid = ntohs(NetOurVLAN); 1928 if (myvlanid == (ushort)-1) 1929 myvlanid = VLAN_NONE; 1930 1931 memcpy(et->et_dest, addr, 6); 1932 memcpy(et->et_src, NetOurEther, 6); 1933 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1934 et->et_protlen = htons(prot); 1935 return ETHER_HDR_SIZE; 1936 } else { 1937 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1938 1939 vet->vet_vlan_type = htons(PROT_VLAN); 1940 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1941 vet->vet_type = htons(prot); 1942 return VLAN_ETHER_HDR_SIZE; 1943 } 1944 } 1945 1946 void 1947 NetSetIP(volatile uchar *xip, IPaddr_t dest, int dport, int sport, int len) 1948 { 1949 IP_t *ip = (IP_t *)xip; 1950 1951 /* 1952 * If the data is an odd number of bytes, zero the 1953 * byte after the last byte so that the checksum 1954 * will work. 1955 */ 1956 if (len & 1) 1957 xip[IP_HDR_SIZE + len] = 0; 1958 1959 /* 1960 * Construct an IP and UDP header. 1961 * (need to set no fragment bit - XXX) 1962 */ 1963 /* IP_HDR_SIZE / 4 (not including UDP) */ 1964 ip->ip_hl_v = 0x45; 1965 ip->ip_tos = 0; 1966 ip->ip_len = htons(IP_HDR_SIZE + len); 1967 ip->ip_id = htons(NetIPID++); 1968 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1969 ip->ip_ttl = 255; 1970 ip->ip_p = 17; /* UDP */ 1971 ip->ip_sum = 0; 1972 /* already in network byte order */ 1973 NetCopyIP((void *)&ip->ip_src, &NetOurIP); 1974 /* - "" - */ 1975 NetCopyIP((void *)&ip->ip_dst, &dest); 1976 ip->udp_src = htons(sport); 1977 ip->udp_dst = htons(dport); 1978 ip->udp_len = htons(8 + len); 1979 ip->udp_xsum = 0; 1980 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1981 } 1982 1983 void copy_filename(char *dst, const char *src, int size) 1984 { 1985 if (*src && (*src == '"')) { 1986 ++src; 1987 --size; 1988 } 1989 1990 while ((--size > 0) && *src && (*src != '"')) 1991 *dst++ = *src++; 1992 *dst = '\0'; 1993 } 1994 1995 #if defined(CONFIG_CMD_NFS) || \ 1996 defined(CONFIG_CMD_SNTP) || \ 1997 defined(CONFIG_CMD_DNS) 1998 /* 1999 * make port a little random (1024-17407) 2000 * This keeps the math somewhat trivial to compute, and seems to work with 2001 * all supported protocols/clients/servers 2002 */ 2003 unsigned int random_port(void) 2004 { 2005 return 1024 + (get_timer(0) % 0x4000); 2006 } 2007 #endif 2008 2009 void ip_to_string(IPaddr_t x, char *s) 2010 { 2011 x = ntohl(x); 2012 sprintf(s, "%d.%d.%d.%d", 2013 (int) ((x >> 24) & 0xff), 2014 (int) ((x >> 16) & 0xff), 2015 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 2016 ); 2017 } 2018 2019 void VLAN_to_string(ushort x, char *s) 2020 { 2021 x = ntohs(x); 2022 2023 if (x == (ushort)-1) 2024 x = VLAN_NONE; 2025 2026 if (x == VLAN_NONE) 2027 strcpy(s, "none"); 2028 else 2029 sprintf(s, "%d", x & VLAN_IDMASK); 2030 } 2031 2032 ushort string_to_VLAN(const char *s) 2033 { 2034 ushort id; 2035 2036 if (s == NULL) 2037 return htons(VLAN_NONE); 2038 2039 if (*s < '0' || *s > '9') 2040 id = VLAN_NONE; 2041 else 2042 id = (ushort)simple_strtoul(s, NULL, 10); 2043 2044 return htons(id); 2045 } 2046 2047 ushort getenv_VLAN(char *var) 2048 { 2049 return string_to_VLAN(getenv(var)); 2050 } 2051