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