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 93 #if defined(CONFIG_CMD_NET) 94 95 DECLARE_GLOBAL_DATA_PTR; 96 97 #define ARP_TIMEOUT 5UL /* Seconds before trying ARP again */ 98 #ifndef CONFIG_NET_RETRY_COUNT 99 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 100 #else 101 # define ARP_TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) 102 #endif 103 104 #if 0 105 #define ET_DEBUG 106 #endif 107 108 /** BOOTP EXTENTIONS **/ 109 110 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 111 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 112 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 113 #if defined(CONFIG_BOOTP_DNS2) 114 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 115 #endif 116 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 117 char NetOurHostName[32]={0,}; /* Our hostname */ 118 char NetOurRootPath[64]={0,}; /* Our bootpath */ 119 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 120 121 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 122 IPaddr_t Mcast_addr; 123 #endif 124 125 /** END OF BOOTP EXTENTIONS **/ 126 127 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 128 uchar NetOurEther[6]; /* Our ethernet address */ 129 uchar NetServerEther[6] = /* Boot server enet address */ 130 { 0, 0, 0, 0, 0, 0 }; 131 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 132 IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */ 133 volatile uchar *NetRxPkt; /* Current receive packet */ 134 int NetRxPktLen; /* Current rx packet length */ 135 unsigned NetIPID; /* IP packet ID */ 136 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 137 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 138 uchar NetEtherNullAddr[6] = 139 { 0, 0, 0, 0, 0, 0 }; 140 #ifdef CONFIG_API 141 void (*push_packet)(volatile void *, int len) = 0; 142 #endif 143 #if defined(CONFIG_CMD_CDP) 144 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 145 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 146 #endif 147 int NetState; /* Network loop state */ 148 #ifdef CONFIG_NET_MULTI 149 int NetRestartWrap = 0; /* Tried all network devices */ 150 static int NetRestarted = 0; /* Network loop restarted */ 151 static int NetDevExists = 0; /* At least one device configured */ 152 #endif 153 154 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 155 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 156 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 157 158 char BootFile[128]; /* Boot File name */ 159 160 #if defined(CONFIG_CMD_PING) 161 IPaddr_t NetPingIP; /* the ip address to ping */ 162 163 static void PingStart(void); 164 #endif 165 166 #if defined(CONFIG_CMD_CDP) 167 static void CDPStart(void); 168 #endif 169 170 #if defined(CONFIG_CMD_SNTP) 171 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 172 int NetTimeOffset=0; /* offset time from UTC */ 173 #endif 174 175 #ifdef CONFIG_NETCONSOLE 176 void NcStart(void); 177 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 178 #endif 179 180 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 181 182 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 183 184 static rxhand_f *packetHandler; /* Current RX packet handler */ 185 static thand_f *timeHandler; /* Current timeout handler */ 186 static ulong timeStart; /* Time base value */ 187 static ulong timeDelta; /* Current timeout value */ 188 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 189 190 static int net_check_prereq (proto_t protocol); 191 192 /**********************************************************************/ 193 194 IPaddr_t NetArpWaitPacketIP; 195 IPaddr_t NetArpWaitReplyIP; 196 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 197 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 198 int NetArpWaitTxPacketSize; 199 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 200 ulong NetArpWaitTimerStart; 201 int NetArpWaitTry; 202 203 void ArpRequest (void) 204 { 205 int i; 206 volatile uchar *pkt; 207 ARP_t *arp; 208 209 #ifdef ET_DEBUG 210 printf ("ARP broadcast %d\n", NetArpWaitTry); 211 #endif 212 pkt = NetTxPacket; 213 214 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 215 216 arp = (ARP_t *) pkt; 217 218 arp->ar_hrd = htons (ARP_ETHER); 219 arp->ar_pro = htons (PROT_IP); 220 arp->ar_hln = 6; 221 arp->ar_pln = 4; 222 arp->ar_op = htons (ARPOP_REQUEST); 223 224 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 225 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 226 for (i = 10; i < 16; ++i) { 227 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 228 } 229 230 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 231 (NetOurIP & NetOurSubnetMask)) { 232 if (NetOurGatewayIP == 0) { 233 puts ("## Warning: gatewayip needed but not set\n"); 234 NetArpWaitReplyIP = NetArpWaitPacketIP; 235 } else { 236 NetArpWaitReplyIP = NetOurGatewayIP; 237 } 238 } else { 239 NetArpWaitReplyIP = NetArpWaitPacketIP; 240 } 241 242 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 243 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 244 } 245 246 void ArpTimeoutCheck(void) 247 { 248 ulong t; 249 250 if (!NetArpWaitPacketIP) 251 return; 252 253 t = get_timer(0); 254 255 /* check for arp timeout */ 256 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) { 257 NetArpWaitTry++; 258 259 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 260 puts ("\nARP Retry count exceeded; starting again\n"); 261 NetArpWaitTry = 0; 262 NetStartAgain(); 263 } else { 264 NetArpWaitTimerStart = t; 265 ArpRequest(); 266 } 267 } 268 } 269 270 /**********************************************************************/ 271 /* 272 * Main network processing loop. 273 */ 274 275 int 276 NetLoop(proto_t protocol) 277 { 278 bd_t *bd = gd->bd; 279 280 #ifdef CONFIG_NET_MULTI 281 NetRestarted = 0; 282 NetDevExists = 0; 283 #endif 284 285 /* XXX problem with bss workaround */ 286 NetArpWaitPacketMAC = NULL; 287 NetArpWaitTxPacket = NULL; 288 NetArpWaitPacketIP = 0; 289 NetArpWaitReplyIP = 0; 290 NetArpWaitTxPacket = NULL; 291 NetTxPacket = NULL; 292 293 if (!NetTxPacket) { 294 int i; 295 /* 296 * Setup packet buffers, aligned correctly. 297 */ 298 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 299 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 300 for (i = 0; i < PKTBUFSRX; i++) { 301 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 302 } 303 } 304 305 if (!NetArpWaitTxPacket) { 306 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 307 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 308 NetArpWaitTxPacketSize = 0; 309 } 310 311 eth_halt(); 312 #ifdef CONFIG_NET_MULTI 313 eth_set_current(); 314 #endif 315 if (eth_init(bd) < 0) { 316 eth_halt(); 317 return(-1); 318 } 319 320 restart: 321 #ifdef CONFIG_NET_MULTI 322 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 323 #else 324 memcpy (NetOurEther, bd->bi_enetaddr, 6); 325 #endif 326 327 NetState = NETLOOP_CONTINUE; 328 329 /* 330 * Start the ball rolling with the given start function. From 331 * here on, this code is a state machine driven by received 332 * packets and timer events. 333 */ 334 335 switch (protocol) { 336 #if defined(CONFIG_CMD_NFS) 337 case NFS: 338 #endif 339 #if defined(CONFIG_CMD_PING) 340 case PING: 341 #endif 342 #if defined(CONFIG_CMD_SNTP) 343 case SNTP: 344 #endif 345 case NETCONS: 346 case TFTP: 347 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 348 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 349 NetOurSubnetMask= getenv_IPaddr ("netmask"); 350 NetOurVLAN = getenv_VLAN("vlan"); 351 NetOurNativeVLAN = getenv_VLAN("nvlan"); 352 353 switch (protocol) { 354 #if defined(CONFIG_CMD_NFS) 355 case NFS: 356 #endif 357 case NETCONS: 358 case TFTP: 359 NetServerIP = getenv_IPaddr ("serverip"); 360 break; 361 #if defined(CONFIG_CMD_PING) 362 case PING: 363 /* nothing */ 364 break; 365 #endif 366 #if defined(CONFIG_CMD_SNTP) 367 case SNTP: 368 /* nothing */ 369 break; 370 #endif 371 default: 372 break; 373 } 374 375 break; 376 case BOOTP: 377 case RARP: 378 /* 379 * initialize our IP addr to 0 in order to accept ANY 380 * IP addr assigned to us by the BOOTP / RARP server 381 */ 382 NetOurIP = 0; 383 NetServerIP = getenv_IPaddr ("serverip"); 384 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 385 NetOurNativeVLAN = getenv_VLAN("nvlan"); 386 case CDP: 387 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 388 NetOurNativeVLAN = getenv_VLAN("nvlan"); 389 break; 390 default: 391 break; 392 } 393 394 switch (net_check_prereq (protocol)) { 395 case 1: 396 /* network not configured */ 397 eth_halt(); 398 return (-1); 399 400 #ifdef CONFIG_NET_MULTI 401 case 2: 402 /* network device not configured */ 403 break; 404 #endif /* CONFIG_NET_MULTI */ 405 406 case 0: 407 #ifdef CONFIG_NET_MULTI 408 NetDevExists = 1; 409 #endif 410 switch (protocol) { 411 case TFTP: 412 /* always use ARP to get server ethernet address */ 413 TftpStart(); 414 break; 415 416 #if defined(CONFIG_CMD_DHCP) 417 case DHCP: 418 /* Start with a clean slate... */ 419 BootpTry = 0; 420 NetOurIP = 0; 421 NetServerIP = getenv_IPaddr ("serverip"); 422 DhcpRequest(); /* Basically same as BOOTP */ 423 break; 424 #endif 425 426 case BOOTP: 427 BootpTry = 0; 428 BootpRequest (); 429 break; 430 431 case RARP: 432 RarpTry = 0; 433 RarpRequest (); 434 break; 435 #if defined(CONFIG_CMD_PING) 436 case PING: 437 PingStart(); 438 break; 439 #endif 440 #if defined(CONFIG_CMD_NFS) 441 case NFS: 442 NfsStart(); 443 break; 444 #endif 445 #if defined(CONFIG_CMD_CDP) 446 case CDP: 447 CDPStart(); 448 break; 449 #endif 450 #ifdef CONFIG_NETCONSOLE 451 case NETCONS: 452 NcStart(); 453 break; 454 #endif 455 #if defined(CONFIG_CMD_SNTP) 456 case SNTP: 457 SntpStart(); 458 break; 459 #endif 460 default: 461 break; 462 } 463 464 NetBootFileXferSize = 0; 465 break; 466 } 467 468 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 469 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 470 /* 471 * Echo the inverted link state to the fault LED. 472 */ 473 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) { 474 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 475 } else { 476 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 477 } 478 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 479 #endif /* CONFIG_MII, ... */ 480 481 /* 482 * Main packet reception loop. Loop receiving packets until 483 * someone sets `NetState' to a state that terminates. 484 */ 485 for (;;) { 486 WATCHDOG_RESET(); 487 #ifdef CONFIG_SHOW_ACTIVITY 488 { 489 extern void show_activity(int arg); 490 show_activity(1); 491 } 492 #endif 493 /* 494 * Check the ethernet for a new packet. The ethernet 495 * receive routine will process it. 496 */ 497 eth_rx(); 498 499 /* 500 * Abort if ctrl-c was pressed. 501 */ 502 if (ctrlc()) { 503 eth_halt(); 504 puts ("\nAbort\n"); 505 return (-1); 506 } 507 508 ArpTimeoutCheck(); 509 510 /* 511 * Check for a timeout, and run the timeout handler 512 * if we have one. 513 */ 514 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 515 thand_f *x; 516 517 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 518 # if defined(CFG_FAULT_ECHO_LINK_DOWN) && \ 519 defined(CONFIG_STATUS_LED) && \ 520 defined(STATUS_LED_RED) 521 /* 522 * Echo the inverted link state to the fault LED. 523 */ 524 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) { 525 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 526 } else { 527 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 528 } 529 # endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 530 #endif /* CONFIG_MII, ... */ 531 x = timeHandler; 532 timeHandler = (thand_f *)0; 533 (*x)(); 534 } 535 536 537 switch (NetState) { 538 539 case NETLOOP_RESTART: 540 #ifdef CONFIG_NET_MULTI 541 NetRestarted = 1; 542 #endif 543 goto restart; 544 545 case NETLOOP_SUCCESS: 546 if (NetBootFileXferSize > 0) { 547 char buf[20]; 548 printf("Bytes transferred = %ld (%lx hex)\n", 549 NetBootFileXferSize, 550 NetBootFileXferSize); 551 sprintf(buf, "%lX", NetBootFileXferSize); 552 setenv("filesize", buf); 553 554 sprintf(buf, "%lX", (unsigned long)load_addr); 555 setenv("fileaddr", buf); 556 } 557 eth_halt(); 558 return NetBootFileXferSize; 559 560 case NETLOOP_FAIL: 561 return (-1); 562 } 563 } 564 } 565 566 /**********************************************************************/ 567 568 static void 569 startAgainTimeout(void) 570 { 571 NetState = NETLOOP_RESTART; 572 } 573 574 static void 575 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 576 { 577 /* Totally ignore the packet */ 578 } 579 580 void NetStartAgain (void) 581 { 582 char *nretry; 583 int noretry = 0, once = 0; 584 585 if ((nretry = getenv ("netretry")) != NULL) { 586 noretry = (strcmp (nretry, "no") == 0); 587 once = (strcmp (nretry, "once") == 0); 588 } 589 if (noretry) { 590 eth_halt (); 591 NetState = NETLOOP_FAIL; 592 return; 593 } 594 #ifndef CONFIG_NET_MULTI 595 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout); 596 NetSetHandler (startAgainHandler); 597 #else /* !CONFIG_NET_MULTI*/ 598 eth_halt (); 599 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 600 eth_try_another (!NetRestarted); 601 #endif 602 eth_init (gd->bd); 603 if (NetRestartWrap) { 604 NetRestartWrap = 0; 605 if (NetDevExists && !once) { 606 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout); 607 NetSetHandler (startAgainHandler); 608 } else { 609 NetState = NETLOOP_FAIL; 610 } 611 } else { 612 NetState = NETLOOP_RESTART; 613 } 614 #endif /* CONFIG_NET_MULTI */ 615 } 616 617 /**********************************************************************/ 618 /* 619 * Miscelaneous bits. 620 */ 621 622 void 623 NetSetHandler(rxhand_f * f) 624 { 625 packetHandler = f; 626 } 627 628 629 void 630 NetSetTimeout(ulong iv, thand_f * f) 631 { 632 if (iv == 0) { 633 timeHandler = (thand_f *)0; 634 } else { 635 timeHandler = f; 636 timeStart = get_timer(0); 637 timeDelta = iv; 638 } 639 } 640 641 642 void 643 NetSendPacket(volatile uchar * pkt, int len) 644 { 645 (void) eth_send(pkt, len); 646 } 647 648 int 649 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 650 { 651 uchar *pkt; 652 653 /* convert to new style broadcast */ 654 if (dest == 0) 655 dest = 0xFFFFFFFF; 656 657 /* if broadcast, make the ether address a broadcast and don't do ARP */ 658 if (dest == 0xFFFFFFFF) 659 ether = NetBcastAddr; 660 661 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 662 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 663 664 #ifdef ET_DEBUG 665 printf("sending ARP for %08lx\n", dest); 666 #endif 667 NetArpWaitPacketIP = dest; 668 NetArpWaitPacketMAC = ether; 669 670 pkt = NetArpWaitTxPacket; 671 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 672 673 NetSetIP (pkt, dest, dport, sport, len); 674 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 675 676 /* size of the waiting packet */ 677 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 678 679 /* and do the ARP request */ 680 NetArpWaitTry = 1; 681 NetArpWaitTimerStart = get_timer(0); 682 ArpRequest(); 683 return 1; /* waiting */ 684 } 685 686 #ifdef ET_DEBUG 687 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", 688 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 689 #endif 690 691 pkt = (uchar *)NetTxPacket; 692 pkt += NetSetEther (pkt, ether, PROT_IP); 693 NetSetIP (pkt, dest, dport, sport, len); 694 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 695 696 return 0; /* transmitted */ 697 } 698 699 #if defined(CONFIG_CMD_PING) 700 static ushort PingSeqNo; 701 702 int PingSend(void) 703 { 704 static uchar mac[6]; 705 volatile IP_t *ip; 706 volatile ushort *s; 707 uchar *pkt; 708 709 /* XXX always send arp request */ 710 711 memcpy(mac, NetEtherNullAddr, 6); 712 713 #ifdef ET_DEBUG 714 printf("sending ARP for %08lx\n", NetPingIP); 715 #endif 716 717 NetArpWaitPacketIP = NetPingIP; 718 NetArpWaitPacketMAC = mac; 719 720 pkt = NetArpWaitTxPacket; 721 pkt += NetSetEther(pkt, mac, PROT_IP); 722 723 ip = (volatile IP_t *)pkt; 724 725 /* 726 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 727 */ 728 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 729 ip->ip_tos = 0; 730 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 731 ip->ip_id = htons(NetIPID++); 732 ip->ip_off = htons(0x4000); /* No fragmentation */ 733 ip->ip_ttl = 255; 734 ip->ip_p = 0x01; /* ICMP */ 735 ip->ip_sum = 0; 736 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 737 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 738 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 739 740 s = &ip->udp_src; /* XXX ICMP starts here */ 741 s[0] = htons(0x0800); /* echo-request, code */ 742 s[1] = 0; /* checksum */ 743 s[2] = 0; /* identifier */ 744 s[3] = htons(PingSeqNo++); /* sequence number */ 745 s[1] = ~NetCksum((uchar *)s, 8/2); 746 747 /* size of the waiting packet */ 748 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 749 750 /* and do the ARP request */ 751 NetArpWaitTry = 1; 752 NetArpWaitTimerStart = get_timer(0); 753 ArpRequest(); 754 return 1; /* waiting */ 755 } 756 757 static void 758 PingTimeout (void) 759 { 760 eth_halt(); 761 NetState = NETLOOP_FAIL; /* we did not get the reply */ 762 } 763 764 static void 765 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 766 { 767 IPaddr_t tmp; 768 volatile IP_t *ip = (volatile IP_t *)pkt; 769 770 tmp = NetReadIP((void *)&ip->ip_src); 771 if (tmp != NetPingIP) 772 return; 773 774 NetState = NETLOOP_SUCCESS; 775 } 776 777 static void PingStart(void) 778 { 779 #if defined(CONFIG_NET_MULTI) 780 printf ("Using %s device\n", eth_get_name()); 781 #endif /* CONFIG_NET_MULTI */ 782 NetSetTimeout (10UL * CFG_HZ, PingTimeout); 783 NetSetHandler (PingHandler); 784 785 PingSend(); 786 } 787 #endif 788 789 #if defined(CONFIG_CMD_CDP) 790 791 #define CDP_DEVICE_ID_TLV 0x0001 792 #define CDP_ADDRESS_TLV 0x0002 793 #define CDP_PORT_ID_TLV 0x0003 794 #define CDP_CAPABILITIES_TLV 0x0004 795 #define CDP_VERSION_TLV 0x0005 796 #define CDP_PLATFORM_TLV 0x0006 797 #define CDP_NATIVE_VLAN_TLV 0x000a 798 #define CDP_APPLIANCE_VLAN_TLV 0x000e 799 #define CDP_TRIGGER_TLV 0x000f 800 #define CDP_POWER_CONSUMPTION_TLV 0x0010 801 #define CDP_SYSNAME_TLV 0x0014 802 #define CDP_SYSOBJECT_TLV 0x0015 803 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 804 805 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */ 806 807 static int CDPSeq; 808 static int CDPOK; 809 810 ushort CDPNativeVLAN; 811 ushort CDPApplianceVLAN; 812 813 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 814 815 static ushort CDP_compute_csum(const uchar *buff, ushort len) 816 { 817 ushort csum; 818 int odd; 819 ulong result = 0; 820 ushort leftover; 821 ushort *p; 822 823 if (len > 0) { 824 odd = 1 & (ulong)buff; 825 if (odd) { 826 result = *buff << 8; 827 len--; 828 buff++; 829 } 830 while (len > 1) { 831 p = (ushort *)buff; 832 result += *p++; 833 buff = (uchar *)p; 834 if (result & 0x80000000) 835 result = (result & 0xFFFF) + (result >> 16); 836 len -= 2; 837 } 838 if (len) { 839 leftover = (signed short)(*(const signed char *)buff); 840 /* CISCO SUCKS big time! (and blows too): 841 * CDP uses the IP checksum algorithm with a twist; 842 * for the last byte it *sign* extends and sums. 843 */ 844 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 845 } 846 while (result >> 16) 847 result = (result & 0xFFFF) + (result >> 16); 848 849 if (odd) 850 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 851 } 852 853 /* add up 16-bit and 17-bit words for 17+c bits */ 854 result = (result & 0xffff) + (result >> 16); 855 /* add up 16-bit and 2-bit for 16+c bit */ 856 result = (result & 0xffff) + (result >> 16); 857 /* add up carry.. */ 858 result = (result & 0xffff) + (result >> 16); 859 860 /* negate */ 861 csum = ~(ushort)result; 862 863 /* run time endian detection */ 864 if (csum != htons(csum)) /* little endian */ 865 csum = htons(csum); 866 867 return csum; 868 } 869 870 int CDPSendTrigger(void) 871 { 872 volatile uchar *pkt; 873 volatile ushort *s; 874 volatile ushort *cp; 875 Ethernet_t *et; 876 int len; 877 ushort chksum; 878 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 879 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 880 char buf[32]; 881 #endif 882 883 pkt = NetTxPacket; 884 et = (Ethernet_t *)pkt; 885 886 /* NOTE: trigger sent not on any VLAN */ 887 888 /* form ethernet header */ 889 memcpy(et->et_dest, NetCDPAddr, 6); 890 memcpy(et->et_src, NetOurEther, 6); 891 892 pkt += ETHER_HDR_SIZE; 893 894 /* SNAP header */ 895 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 896 pkt += sizeof(CDP_SNAP_hdr); 897 898 /* CDP header */ 899 *pkt++ = 0x02; /* CDP version 2 */ 900 *pkt++ = 180; /* TTL */ 901 s = (volatile ushort *)pkt; 902 cp = s; 903 *s++ = htons(0); /* checksum (0 for later calculation) */ 904 905 /* CDP fields */ 906 #ifdef CONFIG_CDP_DEVICE_ID 907 *s++ = htons(CDP_DEVICE_ID_TLV); 908 *s++ = htons(CONFIG_CDP_DEVICE_ID); 909 memset(buf, 0, sizeof(buf)); 910 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 911 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 912 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 913 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 914 memcpy((uchar *)s, buf, 16); 915 s += 16 / 2; 916 #endif 917 918 #ifdef CONFIG_CDP_PORT_ID 919 *s++ = htons(CDP_PORT_ID_TLV); 920 memset(buf, 0, sizeof(buf)); 921 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 922 len = strlen(buf); 923 if (len & 1) /* make it even */ 924 len++; 925 *s++ = htons(len + 4); 926 memcpy((uchar *)s, buf, len); 927 s += len / 2; 928 #endif 929 930 #ifdef CONFIG_CDP_CAPABILITIES 931 *s++ = htons(CDP_CAPABILITIES_TLV); 932 *s++ = htons(8); 933 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 934 s += 2; 935 #endif 936 937 #ifdef CONFIG_CDP_VERSION 938 *s++ = htons(CDP_VERSION_TLV); 939 memset(buf, 0, sizeof(buf)); 940 strcpy(buf, CONFIG_CDP_VERSION); 941 len = strlen(buf); 942 if (len & 1) /* make it even */ 943 len++; 944 *s++ = htons(len + 4); 945 memcpy((uchar *)s, buf, len); 946 s += len / 2; 947 #endif 948 949 #ifdef CONFIG_CDP_PLATFORM 950 *s++ = htons(CDP_PLATFORM_TLV); 951 memset(buf, 0, sizeof(buf)); 952 strcpy(buf, CONFIG_CDP_PLATFORM); 953 len = strlen(buf); 954 if (len & 1) /* make it even */ 955 len++; 956 *s++ = htons(len + 4); 957 memcpy((uchar *)s, buf, len); 958 s += len / 2; 959 #endif 960 961 #ifdef CONFIG_CDP_TRIGGER 962 *s++ = htons(CDP_TRIGGER_TLV); 963 *s++ = htons(8); 964 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 965 s += 2; 966 #endif 967 968 #ifdef CONFIG_CDP_POWER_CONSUMPTION 969 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 970 *s++ = htons(6); 971 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 972 #endif 973 974 /* length of ethernet packet */ 975 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 976 et->et_protlen = htons(len); 977 978 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 979 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 980 if (chksum == 0) 981 chksum = 0xFFFF; 982 *cp = htons(chksum); 983 984 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 985 return 0; 986 } 987 988 static void 989 CDPTimeout (void) 990 { 991 CDPSeq++; 992 993 if (CDPSeq < 3) { 994 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 995 CDPSendTrigger(); 996 return; 997 } 998 999 /* if not OK try again */ 1000 if (!CDPOK) 1001 NetStartAgain(); 1002 else 1003 NetState = NETLOOP_SUCCESS; 1004 } 1005 1006 static void 1007 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 1008 { 1009 /* nothing */ 1010 } 1011 1012 static void 1013 CDPHandler(const uchar * pkt, unsigned len) 1014 { 1015 const uchar *t; 1016 const ushort *ss; 1017 ushort type, tlen; 1018 uchar applid; 1019 ushort vlan, nvlan; 1020 1021 /* minimum size? */ 1022 if (len < sizeof(CDP_SNAP_hdr) + 4) 1023 goto pkt_short; 1024 1025 /* check for valid CDP SNAP header */ 1026 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1027 return; 1028 1029 pkt += sizeof(CDP_SNAP_hdr); 1030 len -= sizeof(CDP_SNAP_hdr); 1031 1032 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1033 if (pkt[0] < 0x02 || pkt[1] == 0) 1034 return; 1035 1036 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1037 if (pkt[0] != 0x02) 1038 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1039 pkt[0] & 0xff); 1040 1041 if (CDP_compute_csum(pkt, len) != 0) 1042 return; 1043 1044 pkt += 4; 1045 len -= 4; 1046 1047 vlan = htons(-1); 1048 nvlan = htons(-1); 1049 while (len > 0) { 1050 if (len < 4) 1051 goto pkt_short; 1052 1053 ss = (const ushort *)pkt; 1054 type = ntohs(ss[0]); 1055 tlen = ntohs(ss[1]); 1056 if (tlen > len) { 1057 goto pkt_short; 1058 } 1059 1060 pkt += tlen; 1061 len -= tlen; 1062 1063 ss += 2; /* point ss to the data of the TLV */ 1064 tlen -= 4; 1065 1066 switch (type) { 1067 case CDP_DEVICE_ID_TLV: 1068 break; 1069 case CDP_ADDRESS_TLV: 1070 break; 1071 case CDP_PORT_ID_TLV: 1072 break; 1073 case CDP_CAPABILITIES_TLV: 1074 break; 1075 case CDP_VERSION_TLV: 1076 break; 1077 case CDP_PLATFORM_TLV: 1078 break; 1079 case CDP_NATIVE_VLAN_TLV: 1080 nvlan = *ss; 1081 break; 1082 case CDP_APPLIANCE_VLAN_TLV: 1083 t = (const uchar *)ss; 1084 while (tlen > 0) { 1085 if (tlen < 3) 1086 goto pkt_short; 1087 1088 applid = t[0]; 1089 ss = (const ushort *)(t + 1); 1090 1091 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1092 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1093 vlan = *ss; 1094 #else 1095 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1096 #endif 1097 t += 3; tlen -= 3; 1098 } 1099 break; 1100 case CDP_TRIGGER_TLV: 1101 break; 1102 case CDP_POWER_CONSUMPTION_TLV: 1103 break; 1104 case CDP_SYSNAME_TLV: 1105 break; 1106 case CDP_SYSOBJECT_TLV: 1107 break; 1108 case CDP_MANAGEMENT_ADDRESS_TLV: 1109 break; 1110 } 1111 } 1112 1113 CDPApplianceVLAN = vlan; 1114 CDPNativeVLAN = nvlan; 1115 1116 CDPOK = 1; 1117 return; 1118 1119 pkt_short: 1120 printf("** CDP packet is too short\n"); 1121 return; 1122 } 1123 1124 static void CDPStart(void) 1125 { 1126 #if defined(CONFIG_NET_MULTI) 1127 printf ("Using %s device\n", eth_get_name()); 1128 #endif 1129 CDPSeq = 0; 1130 CDPOK = 0; 1131 1132 CDPNativeVLAN = htons(-1); 1133 CDPApplianceVLAN = htons(-1); 1134 1135 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1136 NetSetHandler (CDPDummyHandler); 1137 1138 CDPSendTrigger(); 1139 } 1140 #endif 1141 1142 1143 void 1144 NetReceive(volatile uchar * inpkt, int len) 1145 { 1146 Ethernet_t *et; 1147 IP_t *ip; 1148 ARP_t *arp; 1149 IPaddr_t tmp; 1150 int x; 1151 uchar *pkt; 1152 #if defined(CONFIG_CMD_CDP) 1153 int iscdp; 1154 #endif 1155 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1156 1157 #ifdef ET_DEBUG 1158 printf("packet received\n"); 1159 #endif 1160 1161 NetRxPkt = inpkt; 1162 NetRxPktLen = len; 1163 et = (Ethernet_t *)inpkt; 1164 1165 /* too small packet? */ 1166 if (len < ETHER_HDR_SIZE) 1167 return; 1168 1169 #ifdef CONFIG_API 1170 if (push_packet) { 1171 (*push_packet)(inpkt, len); 1172 return; 1173 } 1174 #endif 1175 1176 #if defined(CONFIG_CMD_CDP) 1177 /* keep track if packet is CDP */ 1178 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1179 #endif 1180 1181 myvlanid = ntohs(NetOurVLAN); 1182 if (myvlanid == (ushort)-1) 1183 myvlanid = VLAN_NONE; 1184 mynvlanid = ntohs(NetOurNativeVLAN); 1185 if (mynvlanid == (ushort)-1) 1186 mynvlanid = VLAN_NONE; 1187 1188 x = ntohs(et->et_protlen); 1189 1190 #ifdef ET_DEBUG 1191 printf("packet received\n"); 1192 #endif 1193 1194 if (x < 1514) { 1195 /* 1196 * Got a 802 packet. Check the other protocol field. 1197 */ 1198 x = ntohs(et->et_prot); 1199 1200 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1201 len -= E802_HDR_SIZE; 1202 1203 } else if (x != PROT_VLAN) { /* normal packet */ 1204 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1205 len -= ETHER_HDR_SIZE; 1206 1207 } else { /* VLAN packet */ 1208 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1209 1210 #ifdef ET_DEBUG 1211 printf("VLAN packet received\n"); 1212 #endif 1213 /* too small packet? */ 1214 if (len < VLAN_ETHER_HDR_SIZE) 1215 return; 1216 1217 /* if no VLAN active */ 1218 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1219 #if defined(CONFIG_CMD_CDP) 1220 && iscdp == 0 1221 #endif 1222 ) 1223 return; 1224 1225 cti = ntohs(vet->vet_tag); 1226 vlanid = cti & VLAN_IDMASK; 1227 x = ntohs(vet->vet_type); 1228 1229 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1230 len -= VLAN_ETHER_HDR_SIZE; 1231 } 1232 1233 #ifdef ET_DEBUG 1234 printf("Receive from protocol 0x%x\n", x); 1235 #endif 1236 1237 #if defined(CONFIG_CMD_CDP) 1238 if (iscdp) { 1239 CDPHandler((uchar *)ip, len); 1240 return; 1241 } 1242 #endif 1243 1244 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1245 if (vlanid == VLAN_NONE) 1246 vlanid = (mynvlanid & VLAN_IDMASK); 1247 /* not matched? */ 1248 if (vlanid != (myvlanid & VLAN_IDMASK)) 1249 return; 1250 } 1251 1252 switch (x) { 1253 1254 case PROT_ARP: 1255 /* 1256 * We have to deal with two types of ARP packets: 1257 * - REQUEST packets will be answered by sending our 1258 * IP address - if we know it. 1259 * - REPLY packates are expected only after we asked 1260 * for the TFTP server's or the gateway's ethernet 1261 * address; so if we receive such a packet, we set 1262 * the server ethernet address 1263 */ 1264 #ifdef ET_DEBUG 1265 puts ("Got ARP\n"); 1266 #endif 1267 arp = (ARP_t *)ip; 1268 if (len < ARP_HDR_SIZE) { 1269 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1270 return; 1271 } 1272 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1273 return; 1274 } 1275 if (ntohs(arp->ar_pro) != PROT_IP) { 1276 return; 1277 } 1278 if (arp->ar_hln != 6) { 1279 return; 1280 } 1281 if (arp->ar_pln != 4) { 1282 return; 1283 } 1284 1285 if (NetOurIP == 0) { 1286 return; 1287 } 1288 1289 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1290 return; 1291 } 1292 1293 switch (ntohs(arp->ar_op)) { 1294 case ARPOP_REQUEST: /* reply with our IP address */ 1295 #ifdef ET_DEBUG 1296 puts ("Got ARP REQUEST, return our IP\n"); 1297 #endif 1298 pkt = (uchar *)et; 1299 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1300 arp->ar_op = htons(ARPOP_REPLY); 1301 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1302 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1303 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1304 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1305 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1306 return; 1307 1308 case ARPOP_REPLY: /* arp reply */ 1309 /* are we waiting for a reply */ 1310 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1311 break; 1312 #ifdef ET_DEBUG 1313 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1314 arp->ar_data[0], arp->ar_data[1], 1315 arp->ar_data[2], arp->ar_data[3], 1316 arp->ar_data[4], arp->ar_data[5]); 1317 #endif 1318 1319 tmp = NetReadIP(&arp->ar_data[6]); 1320 1321 /* matched waiting packet's address */ 1322 if (tmp == NetArpWaitReplyIP) { 1323 #ifdef ET_DEBUG 1324 puts ("Got it\n"); 1325 #endif 1326 /* save address for later use */ 1327 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1328 1329 #ifdef CONFIG_NETCONSOLE 1330 (*packetHandler)(0,0,0,0); 1331 #endif 1332 /* modify header, and transmit it */ 1333 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1334 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1335 1336 /* no arp request pending now */ 1337 NetArpWaitPacketIP = 0; 1338 NetArpWaitTxPacketSize = 0; 1339 NetArpWaitPacketMAC = NULL; 1340 1341 } 1342 return; 1343 default: 1344 #ifdef ET_DEBUG 1345 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1346 #endif 1347 return; 1348 } 1349 break; 1350 1351 case PROT_RARP: 1352 #ifdef ET_DEBUG 1353 puts ("Got RARP\n"); 1354 #endif 1355 arp = (ARP_t *)ip; 1356 if (len < ARP_HDR_SIZE) { 1357 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1358 return; 1359 } 1360 1361 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1362 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1363 (ntohs(arp->ar_pro) != PROT_IP) || 1364 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1365 1366 puts ("invalid RARP header\n"); 1367 } else { 1368 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1369 if (NetServerIP == 0) 1370 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1371 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1372 1373 (*packetHandler)(0,0,0,0); 1374 } 1375 break; 1376 1377 case PROT_IP: 1378 #ifdef ET_DEBUG 1379 puts ("Got IP\n"); 1380 #endif 1381 if (len < IP_HDR_SIZE) { 1382 debug ("len bad %d < %d\n", len, IP_HDR_SIZE); 1383 return; 1384 } 1385 if (len < ntohs(ip->ip_len)) { 1386 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1387 return; 1388 } 1389 len = ntohs(ip->ip_len); 1390 #ifdef ET_DEBUG 1391 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1392 #endif 1393 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1394 return; 1395 } 1396 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ 1397 return; 1398 } 1399 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1400 puts ("checksum bad\n"); 1401 return; 1402 } 1403 tmp = NetReadIP(&ip->ip_dst); 1404 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1405 #ifdef CONFIG_MCAST_TFTP 1406 if (Mcast_addr != tmp) 1407 #endif 1408 return; 1409 } 1410 /* 1411 * watch for ICMP host redirects 1412 * 1413 * There is no real handler code (yet). We just watch 1414 * for ICMP host redirect messages. In case anybody 1415 * sees these messages: please contact me 1416 * (wd@denx.de), or - even better - send me the 1417 * necessary fixes :-) 1418 * 1419 * Note: in all cases where I have seen this so far 1420 * it was a problem with the router configuration, 1421 * for instance when a router was configured in the 1422 * BOOTP reply, but the TFTP server was on the same 1423 * subnet. So this is probably a warning that your 1424 * configuration might be wrong. But I'm not really 1425 * sure if there aren't any other situations. 1426 */ 1427 if (ip->ip_p == IPPROTO_ICMP) { 1428 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1429 1430 switch (icmph->type) { 1431 case ICMP_REDIRECT: 1432 if (icmph->code != ICMP_REDIR_HOST) 1433 return; 1434 puts (" ICMP Host Redirect to "); 1435 print_IPaddr(icmph->un.gateway); 1436 putc(' '); 1437 return; 1438 #if defined(CONFIG_CMD_PING) 1439 case ICMP_ECHO_REPLY: 1440 /* 1441 * IP header OK. Pass the packet to the current handler. 1442 */ 1443 /* XXX point to ip packet */ 1444 (*packetHandler)((uchar *)ip, 0, 0, 0); 1445 return; 1446 case ICMP_ECHO_REQUEST: 1447 #ifdef ET_DEBUG 1448 printf ("Got ICMP ECHO REQUEST, return %d bytes \n", 1449 ETHER_HDR_SIZE + len); 1450 #endif 1451 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1452 memcpy (&et->et_src[ 0], NetOurEther, 6); 1453 1454 ip->ip_sum = 0; 1455 ip->ip_off = 0; 1456 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1457 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1458 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1459 1460 icmph->type = ICMP_ECHO_REPLY; 1461 icmph->checksum = 0; 1462 icmph->checksum = ~NetCksum((uchar *)icmph, 1463 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1464 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1465 return; 1466 #endif 1467 default: 1468 return; 1469 } 1470 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1471 return; 1472 } 1473 1474 #ifdef CONFIG_UDP_CHECKSUM 1475 if (ip->udp_xsum != 0) { 1476 ulong xsum; 1477 ushort *sumptr; 1478 ushort sumlen; 1479 1480 xsum = ip->ip_p; 1481 xsum += (ntohs(ip->udp_len)); 1482 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1483 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1484 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1485 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1486 1487 sumlen = ntohs(ip->udp_len); 1488 sumptr = (ushort *) &(ip->udp_src); 1489 1490 while (sumlen > 1) { 1491 ushort sumdata; 1492 1493 sumdata = *sumptr++; 1494 xsum += ntohs(sumdata); 1495 sumlen -= 2; 1496 } 1497 if (sumlen > 0) { 1498 ushort sumdata; 1499 1500 sumdata = *(unsigned char *) sumptr; 1501 sumdata = (sumdata << 8) & 0xff00; 1502 xsum += sumdata; 1503 } 1504 while ((xsum >> 16) != 0) { 1505 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1506 } 1507 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1508 printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum)); 1509 return; 1510 } 1511 } 1512 #endif 1513 1514 1515 #ifdef CONFIG_NETCONSOLE 1516 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1517 ntohs(ip->udp_dst), 1518 ntohs(ip->udp_src), 1519 ntohs(ip->udp_len) - 8); 1520 #endif 1521 /* 1522 * IP header OK. Pass the packet to the current handler. 1523 */ 1524 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1525 ntohs(ip->udp_dst), 1526 ntohs(ip->udp_src), 1527 ntohs(ip->udp_len) - 8); 1528 break; 1529 } 1530 } 1531 1532 1533 /**********************************************************************/ 1534 1535 static int net_check_prereq (proto_t protocol) 1536 { 1537 switch (protocol) { 1538 /* Fall through */ 1539 #if defined(CONFIG_CMD_PING) 1540 case PING: 1541 if (NetPingIP == 0) { 1542 puts ("*** ERROR: ping address not given\n"); 1543 return (1); 1544 } 1545 goto common; 1546 #endif 1547 #if defined(CONFIG_CMD_SNTP) 1548 case SNTP: 1549 if (NetNtpServerIP == 0) { 1550 puts ("*** ERROR: NTP server address not given\n"); 1551 return (1); 1552 } 1553 goto common; 1554 #endif 1555 #if defined(CONFIG_CMD_NFS) 1556 case NFS: 1557 #endif 1558 case NETCONS: 1559 case TFTP: 1560 if (NetServerIP == 0) { 1561 puts ("*** ERROR: `serverip' not set\n"); 1562 return (1); 1563 } 1564 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) 1565 common: 1566 #endif 1567 1568 if (NetOurIP == 0) { 1569 puts ("*** ERROR: `ipaddr' not set\n"); 1570 return (1); 1571 } 1572 /* Fall through */ 1573 1574 case DHCP: 1575 case RARP: 1576 case BOOTP: 1577 case CDP: 1578 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1579 #ifdef CONFIG_NET_MULTI 1580 extern int eth_get_dev_index (void); 1581 int num = eth_get_dev_index (); 1582 1583 switch (num) { 1584 case -1: 1585 puts ("*** ERROR: No ethernet found.\n"); 1586 return (1); 1587 case 0: 1588 puts ("*** ERROR: `ethaddr' not set\n"); 1589 break; 1590 default: 1591 printf ("*** ERROR: `eth%daddr' not set\n", 1592 num); 1593 break; 1594 } 1595 1596 NetStartAgain (); 1597 return (2); 1598 #else 1599 puts ("*** ERROR: `ethaddr' not set\n"); 1600 return (1); 1601 #endif 1602 } 1603 /* Fall through */ 1604 default: 1605 return (0); 1606 } 1607 return (0); /* OK */ 1608 } 1609 /**********************************************************************/ 1610 1611 int 1612 NetCksumOk(uchar * ptr, int len) 1613 { 1614 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1615 } 1616 1617 1618 unsigned 1619 NetCksum(uchar * ptr, int len) 1620 { 1621 ulong xsum; 1622 ushort *p = (ushort *)ptr; 1623 1624 xsum = 0; 1625 while (len-- > 0) 1626 xsum += *p++; 1627 xsum = (xsum & 0xffff) + (xsum >> 16); 1628 xsum = (xsum & 0xffff) + (xsum >> 16); 1629 return (xsum & 0xffff); 1630 } 1631 1632 int 1633 NetEthHdrSize(void) 1634 { 1635 ushort myvlanid; 1636 1637 myvlanid = ntohs(NetOurVLAN); 1638 if (myvlanid == (ushort)-1) 1639 myvlanid = VLAN_NONE; 1640 1641 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1642 } 1643 1644 int 1645 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1646 { 1647 Ethernet_t *et = (Ethernet_t *)xet; 1648 ushort myvlanid; 1649 1650 myvlanid = ntohs(NetOurVLAN); 1651 if (myvlanid == (ushort)-1) 1652 myvlanid = VLAN_NONE; 1653 1654 memcpy (et->et_dest, addr, 6); 1655 memcpy (et->et_src, NetOurEther, 6); 1656 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1657 et->et_protlen = htons(prot); 1658 return ETHER_HDR_SIZE; 1659 } else { 1660 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1661 1662 vet->vet_vlan_type = htons(PROT_VLAN); 1663 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1664 vet->vet_type = htons(prot); 1665 return VLAN_ETHER_HDR_SIZE; 1666 } 1667 } 1668 1669 void 1670 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1671 { 1672 volatile IP_t *ip = (IP_t *)xip; 1673 1674 /* 1675 * If the data is an odd number of bytes, zero the 1676 * byte after the last byte so that the checksum 1677 * will work. 1678 */ 1679 if (len & 1) 1680 xip[IP_HDR_SIZE + len] = 0; 1681 1682 /* 1683 * Construct an IP and UDP header. 1684 * (need to set no fragment bit - XXX) 1685 */ 1686 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1687 ip->ip_tos = 0; 1688 ip->ip_len = htons(IP_HDR_SIZE + len); 1689 ip->ip_id = htons(NetIPID++); 1690 ip->ip_off = htons(0x4000); /* No fragmentation */ 1691 ip->ip_ttl = 255; 1692 ip->ip_p = 17; /* UDP */ 1693 ip->ip_sum = 0; 1694 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1695 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1696 ip->udp_src = htons(sport); 1697 ip->udp_dst = htons(dport); 1698 ip->udp_len = htons(8 + len); 1699 ip->udp_xsum = 0; 1700 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1701 } 1702 1703 void copy_filename (char *dst, char *src, int size) 1704 { 1705 if (*src && (*src == '"')) { 1706 ++src; 1707 --size; 1708 } 1709 1710 while ((--size > 0) && *src && (*src != '"')) { 1711 *dst++ = *src++; 1712 } 1713 *dst = '\0'; 1714 } 1715 1716 #endif 1717 1718 void ip_to_string (IPaddr_t x, char *s) 1719 { 1720 x = ntohl (x); 1721 sprintf (s, "%d.%d.%d.%d", 1722 (int) ((x >> 24) & 0xff), 1723 (int) ((x >> 16) & 0xff), 1724 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1725 ); 1726 } 1727 1728 IPaddr_t string_to_ip(char *s) 1729 { 1730 IPaddr_t addr; 1731 char *e; 1732 int i; 1733 1734 if (s == NULL) 1735 return(0); 1736 1737 for (addr=0, i=0; i<4; ++i) { 1738 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1739 addr <<= 8; 1740 addr |= (val & 0xFF); 1741 if (s) { 1742 s = (*e) ? e+1 : e; 1743 } 1744 } 1745 1746 return (htonl(addr)); 1747 } 1748 1749 void VLAN_to_string(ushort x, char *s) 1750 { 1751 x = ntohs(x); 1752 1753 if (x == (ushort)-1) 1754 x = VLAN_NONE; 1755 1756 if (x == VLAN_NONE) 1757 strcpy(s, "none"); 1758 else 1759 sprintf(s, "%d", x & VLAN_IDMASK); 1760 } 1761 1762 ushort string_to_VLAN(char *s) 1763 { 1764 ushort id; 1765 1766 if (s == NULL) 1767 return htons(VLAN_NONE); 1768 1769 if (*s < '0' || *s > '9') 1770 id = VLAN_NONE; 1771 else 1772 id = (ushort)simple_strtoul(s, NULL, 10); 1773 1774 return htons(id); 1775 } 1776 1777 void print_IPaddr (IPaddr_t x) 1778 { 1779 char tmp[16]; 1780 1781 ip_to_string (x, tmp); 1782 1783 puts (tmp); 1784 } 1785 1786 IPaddr_t getenv_IPaddr (char *var) 1787 { 1788 return (string_to_ip(getenv(var))); 1789 } 1790 1791 ushort getenv_VLAN(char *var) 1792 { 1793 return (string_to_VLAN(getenv(var))); 1794 } 1795