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 %08x\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 %08x/%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 %08x\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 ushort vlan, nvlan; 1084 1085 /* minimum size? */ 1086 if (len < sizeof(CDP_SNAP_hdr) + 4) 1087 goto pkt_short; 1088 1089 /* check for valid CDP SNAP header */ 1090 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1091 return; 1092 1093 pkt += sizeof(CDP_SNAP_hdr); 1094 len -= sizeof(CDP_SNAP_hdr); 1095 1096 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1097 if (pkt[0] < 0x02 || pkt[1] == 0) 1098 return; 1099 1100 /* 1101 * if version is greater than 0x02 maybe we'll have a problem; 1102 * output a warning 1103 */ 1104 if (pkt[0] != 0x02) 1105 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1106 pkt[0] & 0xff); 1107 1108 if (CDP_compute_csum(pkt, len) != 0) 1109 return; 1110 1111 pkt += 4; 1112 len -= 4; 1113 1114 vlan = htons(-1); 1115 nvlan = htons(-1); 1116 while (len > 0) { 1117 if (len < 4) 1118 goto pkt_short; 1119 1120 ss = (const ushort *)pkt; 1121 type = ntohs(ss[0]); 1122 tlen = ntohs(ss[1]); 1123 if (tlen > len) 1124 goto pkt_short; 1125 1126 pkt += tlen; 1127 len -= tlen; 1128 1129 ss += 2; /* point ss to the data of the TLV */ 1130 tlen -= 4; 1131 1132 switch (type) { 1133 case CDP_DEVICE_ID_TLV: 1134 break; 1135 case CDP_ADDRESS_TLV: 1136 break; 1137 case CDP_PORT_ID_TLV: 1138 break; 1139 case CDP_CAPABILITIES_TLV: 1140 break; 1141 case CDP_VERSION_TLV: 1142 break; 1143 case CDP_PLATFORM_TLV: 1144 break; 1145 case CDP_NATIVE_VLAN_TLV: 1146 nvlan = *ss; 1147 break; 1148 case CDP_APPLIANCE_VLAN_TLV: 1149 t = (const uchar *)ss; 1150 while (tlen > 0) { 1151 if (tlen < 3) 1152 goto pkt_short; 1153 1154 ss = (const ushort *)(t + 1); 1155 1156 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1157 if (t[0] == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1158 vlan = *ss; 1159 #else 1160 /* XXX will this work; dunno */ 1161 vlan = ntohs(*ss); 1162 #endif 1163 t += 3; tlen -= 3; 1164 } 1165 break; 1166 case CDP_TRIGGER_TLV: 1167 break; 1168 case CDP_POWER_CONSUMPTION_TLV: 1169 break; 1170 case CDP_SYSNAME_TLV: 1171 break; 1172 case CDP_SYSOBJECT_TLV: 1173 break; 1174 case CDP_MANAGEMENT_ADDRESS_TLV: 1175 break; 1176 } 1177 } 1178 1179 CDPApplianceVLAN = vlan; 1180 CDPNativeVLAN = nvlan; 1181 1182 CDPOK = 1; 1183 return; 1184 1185 pkt_short: 1186 printf("** CDP packet is too short\n"); 1187 return; 1188 } 1189 1190 static void CDPStart(void) 1191 { 1192 printf("Using %s device\n", eth_get_name()); 1193 CDPSeq = 0; 1194 CDPOK = 0; 1195 1196 CDPNativeVLAN = htons(-1); 1197 CDPApplianceVLAN = htons(-1); 1198 1199 NetSetTimeout(CDP_TIMEOUT, CDPTimeout); 1200 NetSetHandler(CDPDummyHandler); 1201 1202 CDPSendTrigger(); 1203 } 1204 #endif 1205 1206 #ifdef CONFIG_IP_DEFRAG 1207 /* 1208 * This function collects fragments in a single packet, according 1209 * to the algorithm in RFC815. It returns NULL or the pointer to 1210 * a complete packet, in static storage 1211 */ 1212 #ifndef CONFIG_NET_MAXDEFRAG 1213 #define CONFIG_NET_MAXDEFRAG 16384 1214 #endif 1215 /* 1216 * MAXDEFRAG, above, is chosen in the config file and is real data 1217 * so we need to add the NFS overhead, which is more than TFTP. 1218 * To use sizeof in the internal unnamed structures, we need a real 1219 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately). 1220 * The compiler doesn't complain nor allocates the actual structure 1221 */ 1222 static struct rpc_t rpc_specimen; 1223 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply)) 1224 1225 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP) 1226 1227 /* 1228 * this is the packet being assembled, either data or frag control. 1229 * Fragments go by 8 bytes, so this union must be 8 bytes long 1230 */ 1231 struct hole { 1232 /* first_byte is address of this structure */ 1233 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */ 1234 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */ 1235 u16 prev_hole; /* index of prev, 0 == none */ 1236 u16 unused; 1237 }; 1238 1239 static IP_t *__NetDefragment(IP_t *ip, int *lenp) 1240 { 1241 static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN))); 1242 static u16 first_hole, total_len; 1243 struct hole *payload, *thisfrag, *h, *newh; 1244 IP_t *localip = (IP_t *)pkt_buff; 1245 uchar *indata = (uchar *)ip; 1246 int offset8, start, len, done = 0; 1247 u16 ip_off = ntohs(ip->ip_off); 1248 1249 /* payload starts after IP header, this fragment is in there */ 1250 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP); 1251 offset8 = (ip_off & IP_OFFS); 1252 thisfrag = payload + offset8; 1253 start = offset8 * 8; 1254 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP; 1255 1256 if (start + len > IP_MAXUDP) /* fragment extends too far */ 1257 return NULL; 1258 1259 if (!total_len || localip->ip_id != ip->ip_id) { 1260 /* new (or different) packet, reset structs */ 1261 total_len = 0xffff; 1262 payload[0].last_byte = ~0; 1263 payload[0].next_hole = 0; 1264 payload[0].prev_hole = 0; 1265 first_hole = 0; 1266 /* any IP header will work, copy the first we received */ 1267 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP); 1268 } 1269 1270 /* 1271 * What follows is the reassembly algorithm. We use the payload 1272 * array as a linked list of hole descriptors, as each hole starts 1273 * at a multiple of 8 bytes. However, last byte can be whatever value, 1274 * so it is represented as byte count, not as 8-byte blocks. 1275 */ 1276 1277 h = payload + first_hole; 1278 while (h->last_byte < start) { 1279 if (!h->next_hole) { 1280 /* no hole that far away */ 1281 return NULL; 1282 } 1283 h = payload + h->next_hole; 1284 } 1285 1286 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */ 1287 if (offset8 + ((len + 7) / 8) <= h - payload) { 1288 /* no overlap with holes (dup fragment?) */ 1289 return NULL; 1290 } 1291 1292 if (!(ip_off & IP_FLAGS_MFRAG)) { 1293 /* no more fragmentss: truncate this (last) hole */ 1294 total_len = start + len; 1295 h->last_byte = start + len; 1296 } 1297 1298 /* 1299 * There is some overlap: fix the hole list. This code doesn't 1300 * deal with a fragment that overlaps with two different holes 1301 * (thus being a superset of a previously-received fragment). 1302 */ 1303 1304 if ((h >= thisfrag) && (h->last_byte <= start + len)) { 1305 /* complete overlap with hole: remove hole */ 1306 if (!h->prev_hole && !h->next_hole) { 1307 /* last remaining hole */ 1308 done = 1; 1309 } else if (!h->prev_hole) { 1310 /* first hole */ 1311 first_hole = h->next_hole; 1312 payload[h->next_hole].prev_hole = 0; 1313 } else if (!h->next_hole) { 1314 /* last hole */ 1315 payload[h->prev_hole].next_hole = 0; 1316 } else { 1317 /* in the middle of the list */ 1318 payload[h->next_hole].prev_hole = h->prev_hole; 1319 payload[h->prev_hole].next_hole = h->next_hole; 1320 } 1321 1322 } else if (h->last_byte <= start + len) { 1323 /* overlaps with final part of the hole: shorten this hole */ 1324 h->last_byte = start; 1325 1326 } else if (h >= thisfrag) { 1327 /* overlaps with initial part of the hole: move this hole */ 1328 newh = thisfrag + (len / 8); 1329 *newh = *h; 1330 h = newh; 1331 if (h->next_hole) 1332 payload[h->next_hole].prev_hole = (h - payload); 1333 if (h->prev_hole) 1334 payload[h->prev_hole].next_hole = (h - payload); 1335 else 1336 first_hole = (h - payload); 1337 1338 } else { 1339 /* fragment sits in the middle: split the hole */ 1340 newh = thisfrag + (len / 8); 1341 *newh = *h; 1342 h->last_byte = start; 1343 h->next_hole = (newh - payload); 1344 newh->prev_hole = (h - payload); 1345 if (newh->next_hole) 1346 payload[newh->next_hole].prev_hole = (newh - payload); 1347 } 1348 1349 /* finally copy this fragment and possibly return whole packet */ 1350 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len); 1351 if (!done) 1352 return NULL; 1353 1354 localip->ip_len = htons(total_len); 1355 *lenp = total_len + IP_HDR_SIZE_NO_UDP; 1356 return localip; 1357 } 1358 1359 static inline IP_t *NetDefragment(IP_t *ip, int *lenp) 1360 { 1361 u16 ip_off = ntohs(ip->ip_off); 1362 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 1363 return ip; /* not a fragment */ 1364 return __NetDefragment(ip, lenp); 1365 } 1366 1367 #else /* !CONFIG_IP_DEFRAG */ 1368 1369 static inline IP_t *NetDefragment(IP_t *ip, int *lenp) 1370 { 1371 u16 ip_off = ntohs(ip->ip_off); 1372 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 1373 return ip; /* not a fragment */ 1374 return NULL; 1375 } 1376 #endif 1377 1378 /** 1379 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently 1380 * drop others. 1381 * 1382 * @parma ip IP packet containing the ICMP 1383 */ 1384 static void receive_icmp(IP_t *ip, int len, IPaddr_t src_ip, Ethernet_t *et) 1385 { 1386 ICMP_t *icmph = (ICMP_t *)&ip->udp_src; 1387 1388 switch (icmph->type) { 1389 case ICMP_REDIRECT: 1390 if (icmph->code != ICMP_REDIR_HOST) 1391 return; 1392 printf(" ICMP Host Redirect to %pI4 ", 1393 &icmph->un.gateway); 1394 break; 1395 #if defined(CONFIG_CMD_PING) 1396 case ICMP_ECHO_REPLY: 1397 /* 1398 * IP header OK. Pass the packet to the 1399 * current handler. 1400 */ 1401 /* 1402 * XXX point to ip packet - should this use 1403 * packet_icmp_handler? 1404 */ 1405 (*packetHandler)((uchar *)ip, 0, src_ip, 0, 0); 1406 break; 1407 case ICMP_ECHO_REQUEST: 1408 debug("Got ICMP ECHO REQUEST, return %d bytes\n", 1409 ETHER_HDR_SIZE + len); 1410 1411 memcpy(&et->et_dest[0], &et->et_src[0], 6); 1412 memcpy(&et->et_src[0], NetOurEther, 6); 1413 1414 ip->ip_sum = 0; 1415 ip->ip_off = 0; 1416 NetCopyIP((void *)&ip->ip_dst, &ip->ip_src); 1417 NetCopyIP((void *)&ip->ip_src, &NetOurIP); 1418 ip->ip_sum = ~NetCksum((uchar *)ip, 1419 IP_HDR_SIZE_NO_UDP >> 1); 1420 1421 icmph->type = ICMP_ECHO_REPLY; 1422 icmph->checksum = 0; 1423 icmph->checksum = ~NetCksum((uchar *)icmph, 1424 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1425 (void) eth_send((uchar *)et, 1426 ETHER_HDR_SIZE + len); 1427 break; 1428 #endif 1429 default: 1430 #ifdef CONFIG_CMD_TFTPPUT 1431 if (packet_icmp_handler) 1432 packet_icmp_handler(icmph->type, icmph->code, 1433 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src), 1434 icmph->un.data, ntohs(ip->udp_len)); 1435 #endif 1436 break; 1437 } 1438 } 1439 1440 void 1441 NetReceive(volatile uchar *inpkt, int len) 1442 { 1443 Ethernet_t *et; 1444 IP_t *ip; 1445 ARP_t *arp; 1446 IPaddr_t tmp; 1447 IPaddr_t src_ip; 1448 int x; 1449 uchar *pkt; 1450 #if defined(CONFIG_CMD_CDP) 1451 int iscdp; 1452 #endif 1453 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1454 1455 debug("packet received\n"); 1456 1457 NetRxPacket = inpkt; 1458 NetRxPacketLen = len; 1459 et = (Ethernet_t *)inpkt; 1460 1461 /* too small packet? */ 1462 if (len < ETHER_HDR_SIZE) 1463 return; 1464 1465 #ifdef CONFIG_API 1466 if (push_packet) { 1467 (*push_packet)(inpkt, len); 1468 return; 1469 } 1470 #endif 1471 1472 #if defined(CONFIG_CMD_CDP) 1473 /* keep track if packet is CDP */ 1474 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1475 #endif 1476 1477 myvlanid = ntohs(NetOurVLAN); 1478 if (myvlanid == (ushort)-1) 1479 myvlanid = VLAN_NONE; 1480 mynvlanid = ntohs(NetOurNativeVLAN); 1481 if (mynvlanid == (ushort)-1) 1482 mynvlanid = VLAN_NONE; 1483 1484 x = ntohs(et->et_protlen); 1485 1486 debug("packet received\n"); 1487 1488 if (x < 1514) { 1489 /* 1490 * Got a 802 packet. Check the other protocol field. 1491 */ 1492 x = ntohs(et->et_prot); 1493 1494 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1495 len -= E802_HDR_SIZE; 1496 1497 } else if (x != PROT_VLAN) { /* normal packet */ 1498 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1499 len -= ETHER_HDR_SIZE; 1500 1501 } else { /* VLAN packet */ 1502 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1503 1504 debug("VLAN packet received\n"); 1505 1506 /* too small packet? */ 1507 if (len < VLAN_ETHER_HDR_SIZE) 1508 return; 1509 1510 /* if no VLAN active */ 1511 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1512 #if defined(CONFIG_CMD_CDP) 1513 && iscdp == 0 1514 #endif 1515 ) 1516 return; 1517 1518 cti = ntohs(vet->vet_tag); 1519 vlanid = cti & VLAN_IDMASK; 1520 x = ntohs(vet->vet_type); 1521 1522 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1523 len -= VLAN_ETHER_HDR_SIZE; 1524 } 1525 1526 debug("Receive from protocol 0x%x\n", x); 1527 1528 #if defined(CONFIG_CMD_CDP) 1529 if (iscdp) { 1530 CDPHandler((uchar *)ip, len); 1531 return; 1532 } 1533 #endif 1534 1535 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1536 if (vlanid == VLAN_NONE) 1537 vlanid = (mynvlanid & VLAN_IDMASK); 1538 /* not matched? */ 1539 if (vlanid != (myvlanid & VLAN_IDMASK)) 1540 return; 1541 } 1542 1543 switch (x) { 1544 1545 case PROT_ARP: 1546 /* 1547 * We have to deal with two types of ARP packets: 1548 * - REQUEST packets will be answered by sending our 1549 * IP address - if we know it. 1550 * - REPLY packates are expected only after we asked 1551 * for the TFTP server's or the gateway's ethernet 1552 * address; so if we receive such a packet, we set 1553 * the server ethernet address 1554 */ 1555 debug("Got ARP\n"); 1556 1557 arp = (ARP_t *)ip; 1558 if (len < ARP_HDR_SIZE) { 1559 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1560 return; 1561 } 1562 if (ntohs(arp->ar_hrd) != ARP_ETHER) 1563 return; 1564 if (ntohs(arp->ar_pro) != PROT_IP) 1565 return; 1566 if (arp->ar_hln != 6) 1567 return; 1568 if (arp->ar_pln != 4) 1569 return; 1570 1571 if (NetOurIP == 0) 1572 return; 1573 1574 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) 1575 return; 1576 1577 switch (ntohs(arp->ar_op)) { 1578 case ARPOP_REQUEST: 1579 /* reply with our IP address */ 1580 debug("Got ARP REQUEST, return our IP\n"); 1581 pkt = (uchar *)et; 1582 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1583 arp->ar_op = htons(ARPOP_REPLY); 1584 memcpy(&arp->ar_data[10], &arp->ar_data[0], 6); 1585 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1586 memcpy(&arp->ar_data[0], NetOurEther, 6); 1587 NetCopyIP(&arp->ar_data[6], &NetOurIP); 1588 (void) eth_send((uchar *)et, 1589 (pkt - (uchar *)et) + ARP_HDR_SIZE); 1590 return; 1591 1592 case ARPOP_REPLY: /* arp reply */ 1593 /* are we waiting for a reply */ 1594 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1595 break; 1596 1597 #ifdef CONFIG_KEEP_SERVERADDR 1598 if (NetServerIP == NetArpWaitPacketIP) { 1599 char buf[20]; 1600 sprintf(buf, "%pM", arp->ar_data); 1601 setenv("serveraddr", buf); 1602 } 1603 #endif 1604 1605 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n", 1606 arp->ar_data); 1607 1608 tmp = NetReadIP(&arp->ar_data[6]); 1609 1610 /* matched waiting packet's address */ 1611 if (tmp == NetArpWaitReplyIP) { 1612 debug("Got it\n"); 1613 /* save address for later use */ 1614 memcpy(NetArpWaitPacketMAC, 1615 &arp->ar_data[0], 6); 1616 1617 #ifdef CONFIG_NETCONSOLE 1618 (*packetHandler)(0, 0, 0, 0, 0); 1619 #endif 1620 /* modify header, and transmit it */ 1621 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1622 (void) eth_send(NetArpWaitTxPacket, 1623 NetArpWaitTxPacketSize); 1624 1625 /* no arp request pending now */ 1626 NetArpWaitPacketIP = 0; 1627 NetArpWaitTxPacketSize = 0; 1628 NetArpWaitPacketMAC = NULL; 1629 1630 } 1631 return; 1632 default: 1633 debug("Unexpected ARP opcode 0x%x\n", 1634 ntohs(arp->ar_op)); 1635 return; 1636 } 1637 break; 1638 1639 #ifdef CONFIG_CMD_RARP 1640 case PROT_RARP: 1641 debug("Got RARP\n"); 1642 arp = (ARP_t *)ip; 1643 if (len < ARP_HDR_SIZE) { 1644 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1645 return; 1646 } 1647 1648 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1649 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1650 (ntohs(arp->ar_pro) != PROT_IP) || 1651 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1652 1653 puts("invalid RARP header\n"); 1654 } else { 1655 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1656 if (NetServerIP == 0) 1657 NetCopyIP(&NetServerIP, &arp->ar_data[6]); 1658 memcpy(NetServerEther, &arp->ar_data[0], 6); 1659 1660 (*packetHandler)(0, 0, 0, 0, 0); 1661 } 1662 break; 1663 #endif 1664 case PROT_IP: 1665 debug("Got IP\n"); 1666 /* Before we start poking the header, make sure it is there */ 1667 if (len < IP_HDR_SIZE) { 1668 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE); 1669 return; 1670 } 1671 /* Check the packet length */ 1672 if (len < ntohs(ip->ip_len)) { 1673 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1674 return; 1675 } 1676 len = ntohs(ip->ip_len); 1677 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1678 1679 /* Can't deal with anything except IPv4 */ 1680 if ((ip->ip_hl_v & 0xf0) != 0x40) 1681 return; 1682 /* Can't deal with IP options (headers != 20 bytes) */ 1683 if ((ip->ip_hl_v & 0x0f) > 0x05) 1684 return; 1685 /* Check the Checksum of the header */ 1686 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1687 puts("checksum bad\n"); 1688 return; 1689 } 1690 /* If it is not for us, ignore it */ 1691 tmp = NetReadIP(&ip->ip_dst); 1692 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1693 #ifdef CONFIG_MCAST_TFTP 1694 if (Mcast_addr != tmp) 1695 #endif 1696 return; 1697 } 1698 /* Read source IP address for later use */ 1699 src_ip = NetReadIP(&ip->ip_src); 1700 /* 1701 * The function returns the unchanged packet if it's not 1702 * a fragment, and either the complete packet or NULL if 1703 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL) 1704 */ 1705 ip = NetDefragment(ip, &len); 1706 if (!ip) 1707 return; 1708 /* 1709 * watch for ICMP host redirects 1710 * 1711 * There is no real handler code (yet). We just watch 1712 * for ICMP host redirect messages. In case anybody 1713 * sees these messages: please contact me 1714 * (wd@denx.de), or - even better - send me the 1715 * necessary fixes :-) 1716 * 1717 * Note: in all cases where I have seen this so far 1718 * it was a problem with the router configuration, 1719 * for instance when a router was configured in the 1720 * BOOTP reply, but the TFTP server was on the same 1721 * subnet. So this is probably a warning that your 1722 * configuration might be wrong. But I'm not really 1723 * sure if there aren't any other situations. 1724 * 1725 * Simon Glass <sjg@chromium.org>: We get an ICMP when 1726 * we send a tftp packet to a dead connection, or when 1727 * there is no server at the other end. 1728 */ 1729 if (ip->ip_p == IPPROTO_ICMP) { 1730 receive_icmp(ip, len, src_ip, et); 1731 return; 1732 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1733 return; 1734 } 1735 1736 #ifdef CONFIG_UDP_CHECKSUM 1737 if (ip->udp_xsum != 0) { 1738 ulong xsum; 1739 ushort *sumptr; 1740 ushort sumlen; 1741 1742 xsum = ip->ip_p; 1743 xsum += (ntohs(ip->udp_len)); 1744 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1745 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1746 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1747 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1748 1749 sumlen = ntohs(ip->udp_len); 1750 sumptr = (ushort *) &(ip->udp_src); 1751 1752 while (sumlen > 1) { 1753 ushort sumdata; 1754 1755 sumdata = *sumptr++; 1756 xsum += ntohs(sumdata); 1757 sumlen -= 2; 1758 } 1759 if (sumlen > 0) { 1760 ushort sumdata; 1761 1762 sumdata = *(unsigned char *) sumptr; 1763 sumdata = (sumdata << 8) & 0xff00; 1764 xsum += sumdata; 1765 } 1766 while ((xsum >> 16) != 0) { 1767 xsum = (xsum & 0x0000ffff) + 1768 ((xsum >> 16) & 0x0000ffff); 1769 } 1770 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1771 printf(" UDP wrong checksum %08lx %08x\n", 1772 xsum, ntohs(ip->udp_xsum)); 1773 return; 1774 } 1775 } 1776 #endif 1777 1778 1779 #ifdef CONFIG_NETCONSOLE 1780 nc_input_packet((uchar *)ip + IP_HDR_SIZE, 1781 ntohs(ip->udp_dst), 1782 ntohs(ip->udp_src), 1783 ntohs(ip->udp_len) - 8); 1784 #endif 1785 /* 1786 * IP header OK. Pass the packet to the current handler. 1787 */ 1788 (*packetHandler)((uchar *)ip + IP_HDR_SIZE, 1789 ntohs(ip->udp_dst), 1790 src_ip, 1791 ntohs(ip->udp_src), 1792 ntohs(ip->udp_len) - 8); 1793 break; 1794 } 1795 } 1796 1797 1798 /**********************************************************************/ 1799 1800 static int net_check_prereq(enum proto_t protocol) 1801 { 1802 switch (protocol) { 1803 /* Fall through */ 1804 #if defined(CONFIG_CMD_PING) 1805 case PING: 1806 if (NetPingIP == 0) { 1807 puts("*** ERROR: ping address not given\n"); 1808 return 1; 1809 } 1810 goto common; 1811 #endif 1812 #if defined(CONFIG_CMD_SNTP) 1813 case SNTP: 1814 if (NetNtpServerIP == 0) { 1815 puts("*** ERROR: NTP server address not given\n"); 1816 return 1; 1817 } 1818 goto common; 1819 #endif 1820 #if defined(CONFIG_CMD_DNS) 1821 case DNS: 1822 if (NetOurDNSIP == 0) { 1823 puts("*** ERROR: DNS server address not given\n"); 1824 return 1; 1825 } 1826 goto common; 1827 #endif 1828 #if defined(CONFIG_CMD_NFS) 1829 case NFS: 1830 #endif 1831 case TFTPGET: 1832 case TFTPPUT: 1833 if (NetServerIP == 0) { 1834 puts("*** ERROR: `serverip' not set\n"); 1835 return 1; 1836 } 1837 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \ 1838 defined(CONFIG_CMD_DNS) 1839 common: 1840 #endif 1841 /* Fall through */ 1842 1843 case NETCONS: 1844 case TFTPSRV: 1845 if (NetOurIP == 0) { 1846 puts("*** ERROR: `ipaddr' not set\n"); 1847 return 1; 1848 } 1849 /* Fall through */ 1850 1851 #ifdef CONFIG_CMD_RARP 1852 case RARP: 1853 #endif 1854 case BOOTP: 1855 case CDP: 1856 case DHCP: 1857 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1858 extern int eth_get_dev_index(void); 1859 int num = eth_get_dev_index(); 1860 1861 switch (num) { 1862 case -1: 1863 puts("*** ERROR: No ethernet found.\n"); 1864 return 1; 1865 case 0: 1866 puts("*** ERROR: `ethaddr' not set\n"); 1867 break; 1868 default: 1869 printf("*** ERROR: `eth%daddr' not set\n", 1870 num); 1871 break; 1872 } 1873 1874 NetStartAgain(); 1875 return 2; 1876 } 1877 /* Fall through */ 1878 default: 1879 return 0; 1880 } 1881 return 0; /* OK */ 1882 } 1883 /**********************************************************************/ 1884 1885 int 1886 NetCksumOk(uchar *ptr, int len) 1887 { 1888 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1889 } 1890 1891 1892 unsigned 1893 NetCksum(uchar *ptr, int len) 1894 { 1895 ulong xsum; 1896 ushort *p = (ushort *)ptr; 1897 1898 xsum = 0; 1899 while (len-- > 0) 1900 xsum += *p++; 1901 xsum = (xsum & 0xffff) + (xsum >> 16); 1902 xsum = (xsum & 0xffff) + (xsum >> 16); 1903 return xsum & 0xffff; 1904 } 1905 1906 int 1907 NetEthHdrSize(void) 1908 { 1909 ushort myvlanid; 1910 1911 myvlanid = ntohs(NetOurVLAN); 1912 if (myvlanid == (ushort)-1) 1913 myvlanid = VLAN_NONE; 1914 1915 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : 1916 VLAN_ETHER_HDR_SIZE; 1917 } 1918 1919 int 1920 NetSetEther(volatile uchar *xet, uchar * addr, uint prot) 1921 { 1922 Ethernet_t *et = (Ethernet_t *)xet; 1923 ushort myvlanid; 1924 1925 myvlanid = ntohs(NetOurVLAN); 1926 if (myvlanid == (ushort)-1) 1927 myvlanid = VLAN_NONE; 1928 1929 memcpy(et->et_dest, addr, 6); 1930 memcpy(et->et_src, NetOurEther, 6); 1931 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1932 et->et_protlen = htons(prot); 1933 return ETHER_HDR_SIZE; 1934 } else { 1935 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1936 1937 vet->vet_vlan_type = htons(PROT_VLAN); 1938 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1939 vet->vet_type = htons(prot); 1940 return VLAN_ETHER_HDR_SIZE; 1941 } 1942 } 1943 1944 void 1945 NetSetIP(volatile uchar *xip, IPaddr_t dest, int dport, int sport, int len) 1946 { 1947 IP_t *ip = (IP_t *)xip; 1948 1949 /* 1950 * If the data is an odd number of bytes, zero the 1951 * byte after the last byte so that the checksum 1952 * will work. 1953 */ 1954 if (len & 1) 1955 xip[IP_HDR_SIZE + len] = 0; 1956 1957 /* 1958 * Construct an IP and UDP header. 1959 * (need to set no fragment bit - XXX) 1960 */ 1961 /* IP_HDR_SIZE / 4 (not including UDP) */ 1962 ip->ip_hl_v = 0x45; 1963 ip->ip_tos = 0; 1964 ip->ip_len = htons(IP_HDR_SIZE + len); 1965 ip->ip_id = htons(NetIPID++); 1966 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1967 ip->ip_ttl = 255; 1968 ip->ip_p = 17; /* UDP */ 1969 ip->ip_sum = 0; 1970 /* already in network byte order */ 1971 NetCopyIP((void *)&ip->ip_src, &NetOurIP); 1972 /* - "" - */ 1973 NetCopyIP((void *)&ip->ip_dst, &dest); 1974 ip->udp_src = htons(sport); 1975 ip->udp_dst = htons(dport); 1976 ip->udp_len = htons(8 + len); 1977 ip->udp_xsum = 0; 1978 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1979 } 1980 1981 void copy_filename(char *dst, const char *src, int size) 1982 { 1983 if (*src && (*src == '"')) { 1984 ++src; 1985 --size; 1986 } 1987 1988 while ((--size > 0) && *src && (*src != '"')) 1989 *dst++ = *src++; 1990 *dst = '\0'; 1991 } 1992 1993 #if defined(CONFIG_CMD_NFS) || \ 1994 defined(CONFIG_CMD_SNTP) || \ 1995 defined(CONFIG_CMD_DNS) 1996 /* 1997 * make port a little random (1024-17407) 1998 * This keeps the math somewhat trivial to compute, and seems to work with 1999 * all supported protocols/clients/servers 2000 */ 2001 unsigned int random_port(void) 2002 { 2003 return 1024 + (get_timer(0) % 0x4000); 2004 } 2005 #endif 2006 2007 void ip_to_string(IPaddr_t x, char *s) 2008 { 2009 x = ntohl(x); 2010 sprintf(s, "%d.%d.%d.%d", 2011 (int) ((x >> 24) & 0xff), 2012 (int) ((x >> 16) & 0xff), 2013 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 2014 ); 2015 } 2016 2017 void VLAN_to_string(ushort x, char *s) 2018 { 2019 x = ntohs(x); 2020 2021 if (x == (ushort)-1) 2022 x = VLAN_NONE; 2023 2024 if (x == VLAN_NONE) 2025 strcpy(s, "none"); 2026 else 2027 sprintf(s, "%d", x & VLAN_IDMASK); 2028 } 2029 2030 ushort string_to_VLAN(const char *s) 2031 { 2032 ushort id; 2033 2034 if (s == NULL) 2035 return htons(VLAN_NONE); 2036 2037 if (*s < '0' || *s > '9') 2038 id = VLAN_NONE; 2039 else 2040 id = (ushort)simple_strtoul(s, NULL, 10); 2041 2042 return htons(id); 2043 } 2044 2045 ushort getenv_VLAN(char *var) 2046 { 2047 return string_to_VLAN(getenv(var)); 2048 } 2049