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