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 #if defined(CONFIG_CMD_DNS) 96 #include "dns.h" 97 #endif 98 99 #if defined(CONFIG_CMD_NET) 100 101 DECLARE_GLOBAL_DATA_PTR; 102 103 #ifndef CONFIG_ARP_TIMEOUT 104 # define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */ 105 #else 106 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT 107 #endif 108 109 110 #ifndef CONFIG_NET_RETRY_COUNT 111 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 112 #else 113 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT 114 #endif 115 116 #if 0 117 #define ET_DEBUG 118 #endif 119 120 /** BOOTP EXTENTIONS **/ 121 122 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 123 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 124 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 125 #if defined(CONFIG_BOOTP_DNS2) 126 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 127 #endif 128 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 129 char NetOurHostName[32]={0,}; /* Our hostname */ 130 char NetOurRootPath[64]={0,}; /* Our bootpath */ 131 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 132 133 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 134 IPaddr_t Mcast_addr; 135 #endif 136 137 /** END OF BOOTP EXTENTIONS **/ 138 139 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 140 uchar NetOurEther[6]; /* Our ethernet address */ 141 uchar NetServerEther[6] = /* Boot server enet address */ 142 { 0, 0, 0, 0, 0, 0 }; 143 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 144 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ 145 volatile uchar *NetRxPacket; /* Current receive packet */ 146 int NetRxPacketLen; /* Current rx packet length */ 147 unsigned NetIPID; /* IP packet ID */ 148 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 149 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 150 uchar NetEtherNullAddr[6] = 151 { 0, 0, 0, 0, 0, 0 }; 152 #ifdef CONFIG_API 153 void (*push_packet)(volatile void *, int len) = 0; 154 #endif 155 #if defined(CONFIG_CMD_CDP) 156 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 157 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 158 #endif 159 int NetState; /* Network loop state */ 160 #ifdef CONFIG_NET_MULTI 161 int NetRestartWrap = 0; /* Tried all network devices */ 162 static int NetRestarted = 0; /* Network loop restarted */ 163 static int NetDevExists = 0; /* At least one device configured */ 164 #endif 165 166 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 167 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 168 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 169 170 char BootFile[128]; /* Boot File name */ 171 172 #if defined(CONFIG_CMD_PING) 173 IPaddr_t NetPingIP; /* the ip address to ping */ 174 175 static void PingStart(void); 176 #endif 177 178 #if defined(CONFIG_CMD_CDP) 179 static void CDPStart(void); 180 #endif 181 182 #if defined(CONFIG_CMD_SNTP) 183 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 184 int NetTimeOffset=0; /* offset time from UTC */ 185 #endif 186 187 #ifdef CONFIG_NETCONSOLE 188 void NcStart(void); 189 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 190 #endif 191 192 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 193 194 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 195 196 static rxhand_f *packetHandler; /* Current RX packet handler */ 197 static thand_f *timeHandler; /* Current timeout handler */ 198 static ulong timeStart; /* Time base value */ 199 static ulong timeDelta; /* Current timeout value */ 200 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 201 202 static int net_check_prereq (proto_t protocol); 203 204 /**********************************************************************/ 205 206 IPaddr_t NetArpWaitPacketIP; 207 IPaddr_t NetArpWaitReplyIP; 208 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 209 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 210 int NetArpWaitTxPacketSize; 211 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 212 ulong NetArpWaitTimerStart; 213 int NetArpWaitTry; 214 215 void ArpRequest (void) 216 { 217 int i; 218 volatile uchar *pkt; 219 ARP_t *arp; 220 221 #ifdef ET_DEBUG 222 printf ("ARP broadcast %d\n", NetArpWaitTry); 223 #endif 224 pkt = NetTxPacket; 225 226 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 227 228 arp = (ARP_t *) pkt; 229 230 arp->ar_hrd = htons (ARP_ETHER); 231 arp->ar_pro = htons (PROT_IP); 232 arp->ar_hln = 6; 233 arp->ar_pln = 4; 234 arp->ar_op = htons (ARPOP_REQUEST); 235 236 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 237 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 238 for (i = 10; i < 16; ++i) { 239 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 240 } 241 242 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 243 (NetOurIP & NetOurSubnetMask)) { 244 if (NetOurGatewayIP == 0) { 245 puts ("## Warning: gatewayip needed but not set\n"); 246 NetArpWaitReplyIP = NetArpWaitPacketIP; 247 } else { 248 NetArpWaitReplyIP = NetOurGatewayIP; 249 } 250 } else { 251 NetArpWaitReplyIP = NetArpWaitPacketIP; 252 } 253 254 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 255 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 256 } 257 258 void ArpTimeoutCheck(void) 259 { 260 ulong t; 261 262 if (!NetArpWaitPacketIP) 263 return; 264 265 t = get_timer(0); 266 267 /* check for arp timeout */ 268 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) { 269 NetArpWaitTry++; 270 271 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 272 puts ("\nARP Retry count exceeded; starting again\n"); 273 NetArpWaitTry = 0; 274 NetStartAgain(); 275 } else { 276 NetArpWaitTimerStart = t; 277 ArpRequest(); 278 } 279 } 280 } 281 282 static void 283 NetInitLoop(proto_t protocol) 284 { 285 static int env_changed_id = 0; 286 bd_t *bd = gd->bd; 287 int env_id = get_env_id (); 288 289 /* update only when the environment has changed */ 290 if (env_changed_id != env_id) { 291 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 292 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 293 NetOurSubnetMask= getenv_IPaddr ("netmask"); 294 NetServerIP = getenv_IPaddr ("serverip"); 295 NetOurNativeVLAN = getenv_VLAN("nvlan"); 296 NetOurVLAN = getenv_VLAN("vlan"); 297 #if defined(CONFIG_CMD_DNS) 298 NetOurDNSIP = getenv_IPaddr("dnsip"); 299 #endif 300 env_changed_id = env_id; 301 } 302 303 return; 304 } 305 306 /**********************************************************************/ 307 /* 308 * Main network processing loop. 309 */ 310 311 int 312 NetLoop(proto_t protocol) 313 { 314 bd_t *bd = gd->bd; 315 316 #ifdef CONFIG_NET_MULTI 317 NetRestarted = 0; 318 NetDevExists = 0; 319 #endif 320 321 /* XXX problem with bss workaround */ 322 NetArpWaitPacketMAC = NULL; 323 NetArpWaitTxPacket = NULL; 324 NetArpWaitPacketIP = 0; 325 NetArpWaitReplyIP = 0; 326 NetArpWaitTxPacket = NULL; 327 NetTxPacket = NULL; 328 329 if (!NetTxPacket) { 330 int i; 331 /* 332 * Setup packet buffers, aligned correctly. 333 */ 334 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 335 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 336 for (i = 0; i < PKTBUFSRX; i++) { 337 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 338 } 339 } 340 341 if (!NetArpWaitTxPacket) { 342 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 343 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 344 NetArpWaitTxPacketSize = 0; 345 } 346 347 eth_halt(); 348 #ifdef CONFIG_NET_MULTI 349 eth_set_current(); 350 #endif 351 if (eth_init(bd) < 0) { 352 eth_halt(); 353 return(-1); 354 } 355 356 restart: 357 #ifdef CONFIG_NET_MULTI 358 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 359 #else 360 eth_getenv_enetaddr("ethaddr", NetOurEther); 361 #endif 362 363 NetState = NETLOOP_CONTINUE; 364 365 /* 366 * Start the ball rolling with the given start function. From 367 * here on, this code is a state machine driven by received 368 * packets and timer events. 369 */ 370 NetInitLoop(protocol); 371 372 switch (net_check_prereq (protocol)) { 373 case 1: 374 /* network not configured */ 375 eth_halt(); 376 return (-1); 377 378 #ifdef CONFIG_NET_MULTI 379 case 2: 380 /* network device not configured */ 381 break; 382 #endif /* CONFIG_NET_MULTI */ 383 384 case 0: 385 #ifdef CONFIG_NET_MULTI 386 NetDevExists = 1; 387 #endif 388 switch (protocol) { 389 case TFTP: 390 /* always use ARP to get server ethernet address */ 391 TftpStart(); 392 break; 393 394 #if defined(CONFIG_CMD_DHCP) 395 case DHCP: 396 BootpTry = 0; 397 NetOurIP = 0; 398 DhcpRequest(); /* Basically same as BOOTP */ 399 break; 400 #endif 401 402 case BOOTP: 403 BootpTry = 0; 404 NetOurIP = 0; 405 BootpRequest (); 406 break; 407 408 case RARP: 409 RarpTry = 0; 410 NetOurIP = 0; 411 RarpRequest (); 412 break; 413 #if defined(CONFIG_CMD_PING) 414 case PING: 415 PingStart(); 416 break; 417 #endif 418 #if defined(CONFIG_CMD_NFS) 419 case NFS: 420 NfsStart(); 421 break; 422 #endif 423 #if defined(CONFIG_CMD_CDP) 424 case CDP: 425 CDPStart(); 426 break; 427 #endif 428 #ifdef CONFIG_NETCONSOLE 429 case NETCONS: 430 NcStart(); 431 break; 432 #endif 433 #if defined(CONFIG_CMD_SNTP) 434 case SNTP: 435 SntpStart(); 436 break; 437 #endif 438 #if defined(CONFIG_CMD_DNS) 439 case DNS: 440 DnsStart(); 441 break; 442 #endif 443 default: 444 break; 445 } 446 447 NetBootFileXferSize = 0; 448 break; 449 } 450 451 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 452 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 453 /* 454 * Echo the inverted link state to the fault LED. 455 */ 456 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { 457 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 458 } else { 459 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 460 } 461 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 462 #endif /* CONFIG_MII, ... */ 463 464 /* 465 * Main packet reception loop. Loop receiving packets until 466 * someone sets `NetState' to a state that terminates. 467 */ 468 for (;;) { 469 WATCHDOG_RESET(); 470 #ifdef CONFIG_SHOW_ACTIVITY 471 { 472 extern void show_activity(int arg); 473 show_activity(1); 474 } 475 #endif 476 /* 477 * Check the ethernet for a new packet. The ethernet 478 * receive routine will process it. 479 */ 480 eth_rx(); 481 482 /* 483 * Abort if ctrl-c was pressed. 484 */ 485 if (ctrlc()) { 486 eth_halt(); 487 puts ("\nAbort\n"); 488 return (-1); 489 } 490 491 ArpTimeoutCheck(); 492 493 /* 494 * Check for a timeout, and run the timeout handler 495 * if we have one. 496 */ 497 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 498 thand_f *x; 499 500 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 501 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 502 defined(CONFIG_STATUS_LED) && \ 503 defined(STATUS_LED_RED) 504 /* 505 * Echo the inverted link state to the fault LED. 506 */ 507 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { 508 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 509 } else { 510 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 511 } 512 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 513 #endif /* CONFIG_MII, ... */ 514 x = timeHandler; 515 timeHandler = (thand_f *)0; 516 (*x)(); 517 } 518 519 520 switch (NetState) { 521 522 case NETLOOP_RESTART: 523 #ifdef CONFIG_NET_MULTI 524 NetRestarted = 1; 525 #endif 526 goto restart; 527 528 case NETLOOP_SUCCESS: 529 if (NetBootFileXferSize > 0) { 530 char buf[20]; 531 printf("Bytes transferred = %ld (%lx hex)\n", 532 NetBootFileXferSize, 533 NetBootFileXferSize); 534 sprintf(buf, "%lX", NetBootFileXferSize); 535 setenv("filesize", buf); 536 537 sprintf(buf, "%lX", (unsigned long)load_addr); 538 setenv("fileaddr", buf); 539 } 540 eth_halt(); 541 return NetBootFileXferSize; 542 543 case NETLOOP_FAIL: 544 return (-1); 545 } 546 } 547 } 548 549 /**********************************************************************/ 550 551 static void 552 startAgainTimeout(void) 553 { 554 NetState = NETLOOP_RESTART; 555 } 556 557 static void 558 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 559 { 560 /* Totally ignore the packet */ 561 } 562 563 void NetStartAgain (void) 564 { 565 char *nretry; 566 int noretry = 0, once = 0; 567 568 if ((nretry = getenv ("netretry")) != NULL) { 569 noretry = (strcmp (nretry, "no") == 0); 570 once = (strcmp (nretry, "once") == 0); 571 } 572 if (noretry) { 573 eth_halt (); 574 NetState = NETLOOP_FAIL; 575 return; 576 } 577 #ifndef CONFIG_NET_MULTI 578 NetSetTimeout (10000UL, startAgainTimeout); 579 NetSetHandler (startAgainHandler); 580 #else /* !CONFIG_NET_MULTI*/ 581 eth_halt (); 582 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 583 eth_try_another (!NetRestarted); 584 #endif 585 eth_init (gd->bd); 586 if (NetRestartWrap) { 587 NetRestartWrap = 0; 588 if (NetDevExists && !once) { 589 NetSetTimeout (10000UL, startAgainTimeout); 590 NetSetHandler (startAgainHandler); 591 } else { 592 NetState = NETLOOP_FAIL; 593 } 594 } else { 595 NetState = NETLOOP_RESTART; 596 } 597 #endif /* CONFIG_NET_MULTI */ 598 } 599 600 /**********************************************************************/ 601 /* 602 * Miscelaneous bits. 603 */ 604 605 void 606 NetSetHandler(rxhand_f * f) 607 { 608 packetHandler = f; 609 } 610 611 612 void 613 NetSetTimeout(ulong iv, thand_f * f) 614 { 615 if (iv == 0) { 616 timeHandler = (thand_f *)0; 617 } else { 618 timeHandler = f; 619 timeStart = get_timer(0); 620 timeDelta = iv; 621 } 622 } 623 624 625 void 626 NetSendPacket(volatile uchar * pkt, int len) 627 { 628 (void) eth_send(pkt, len); 629 } 630 631 int 632 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 633 { 634 uchar *pkt; 635 636 /* convert to new style broadcast */ 637 if (dest == 0) 638 dest = 0xFFFFFFFF; 639 640 /* if broadcast, make the ether address a broadcast and don't do ARP */ 641 if (dest == 0xFFFFFFFF) 642 ether = NetBcastAddr; 643 644 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 645 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 646 647 #ifdef ET_DEBUG 648 printf("sending ARP for %08lx\n", dest); 649 #endif 650 NetArpWaitPacketIP = dest; 651 NetArpWaitPacketMAC = ether; 652 653 pkt = NetArpWaitTxPacket; 654 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 655 656 NetSetIP (pkt, dest, dport, sport, len); 657 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 658 659 /* size of the waiting packet */ 660 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 661 662 /* and do the ARP request */ 663 NetArpWaitTry = 1; 664 NetArpWaitTimerStart = get_timer(0); 665 ArpRequest(); 666 return 1; /* waiting */ 667 } 668 669 #ifdef ET_DEBUG 670 printf("sending UDP to %08lx/%pM\n", dest, ether); 671 #endif 672 673 pkt = (uchar *)NetTxPacket; 674 pkt += NetSetEther (pkt, ether, PROT_IP); 675 NetSetIP (pkt, dest, dport, sport, len); 676 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 677 678 return 0; /* transmitted */ 679 } 680 681 #if defined(CONFIG_CMD_PING) 682 static ushort PingSeqNo; 683 684 int PingSend(void) 685 { 686 static uchar mac[6]; 687 volatile IP_t *ip; 688 volatile ushort *s; 689 uchar *pkt; 690 691 /* XXX always send arp request */ 692 693 memcpy(mac, NetEtherNullAddr, 6); 694 695 #ifdef ET_DEBUG 696 printf("sending ARP for %08lx\n", NetPingIP); 697 #endif 698 699 NetArpWaitPacketIP = NetPingIP; 700 NetArpWaitPacketMAC = mac; 701 702 pkt = NetArpWaitTxPacket; 703 pkt += NetSetEther(pkt, mac, PROT_IP); 704 705 ip = (volatile IP_t *)pkt; 706 707 /* 708 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 709 */ 710 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 711 ip->ip_tos = 0; 712 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 713 ip->ip_id = htons(NetIPID++); 714 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 715 ip->ip_ttl = 255; 716 ip->ip_p = 0x01; /* ICMP */ 717 ip->ip_sum = 0; 718 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 719 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 720 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 721 722 s = &ip->udp_src; /* XXX ICMP starts here */ 723 s[0] = htons(0x0800); /* echo-request, code */ 724 s[1] = 0; /* checksum */ 725 s[2] = 0; /* identifier */ 726 s[3] = htons(PingSeqNo++); /* sequence number */ 727 s[1] = ~NetCksum((uchar *)s, 8/2); 728 729 /* size of the waiting packet */ 730 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 731 732 /* and do the ARP request */ 733 NetArpWaitTry = 1; 734 NetArpWaitTimerStart = get_timer(0); 735 ArpRequest(); 736 return 1; /* waiting */ 737 } 738 739 static void 740 PingTimeout (void) 741 { 742 eth_halt(); 743 NetState = NETLOOP_FAIL; /* we did not get the reply */ 744 } 745 746 static void 747 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 748 { 749 IPaddr_t tmp; 750 volatile IP_t *ip = (volatile IP_t *)pkt; 751 752 tmp = NetReadIP((void *)&ip->ip_src); 753 if (tmp != NetPingIP) 754 return; 755 756 NetState = NETLOOP_SUCCESS; 757 } 758 759 static void PingStart(void) 760 { 761 #if defined(CONFIG_NET_MULTI) 762 printf ("Using %s device\n", eth_get_name()); 763 #endif /* CONFIG_NET_MULTI */ 764 NetSetTimeout (10000UL, PingTimeout); 765 NetSetHandler (PingHandler); 766 767 PingSend(); 768 } 769 #endif 770 771 #if defined(CONFIG_CMD_CDP) 772 773 #define CDP_DEVICE_ID_TLV 0x0001 774 #define CDP_ADDRESS_TLV 0x0002 775 #define CDP_PORT_ID_TLV 0x0003 776 #define CDP_CAPABILITIES_TLV 0x0004 777 #define CDP_VERSION_TLV 0x0005 778 #define CDP_PLATFORM_TLV 0x0006 779 #define CDP_NATIVE_VLAN_TLV 0x000a 780 #define CDP_APPLIANCE_VLAN_TLV 0x000e 781 #define CDP_TRIGGER_TLV 0x000f 782 #define CDP_POWER_CONSUMPTION_TLV 0x0010 783 #define CDP_SYSNAME_TLV 0x0014 784 #define CDP_SYSOBJECT_TLV 0x0015 785 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 786 787 #define CDP_TIMEOUT 250UL /* one packet every 250ms */ 788 789 static int CDPSeq; 790 static int CDPOK; 791 792 ushort CDPNativeVLAN; 793 ushort CDPApplianceVLAN; 794 795 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 796 797 static ushort CDP_compute_csum(const uchar *buff, ushort len) 798 { 799 ushort csum; 800 int odd; 801 ulong result = 0; 802 ushort leftover; 803 ushort *p; 804 805 if (len > 0) { 806 odd = 1 & (ulong)buff; 807 if (odd) { 808 result = *buff << 8; 809 len--; 810 buff++; 811 } 812 while (len > 1) { 813 p = (ushort *)buff; 814 result += *p++; 815 buff = (uchar *)p; 816 if (result & 0x80000000) 817 result = (result & 0xFFFF) + (result >> 16); 818 len -= 2; 819 } 820 if (len) { 821 leftover = (signed short)(*(const signed char *)buff); 822 /* CISCO SUCKS big time! (and blows too): 823 * CDP uses the IP checksum algorithm with a twist; 824 * for the last byte it *sign* extends and sums. 825 */ 826 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 827 } 828 while (result >> 16) 829 result = (result & 0xFFFF) + (result >> 16); 830 831 if (odd) 832 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 833 } 834 835 /* add up 16-bit and 17-bit words for 17+c bits */ 836 result = (result & 0xffff) + (result >> 16); 837 /* add up 16-bit and 2-bit for 16+c bit */ 838 result = (result & 0xffff) + (result >> 16); 839 /* add up carry.. */ 840 result = (result & 0xffff) + (result >> 16); 841 842 /* negate */ 843 csum = ~(ushort)result; 844 845 /* run time endian detection */ 846 if (csum != htons(csum)) /* little endian */ 847 csum = htons(csum); 848 849 return csum; 850 } 851 852 int CDPSendTrigger(void) 853 { 854 volatile uchar *pkt; 855 volatile ushort *s; 856 volatile ushort *cp; 857 Ethernet_t *et; 858 int len; 859 ushort chksum; 860 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 861 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 862 char buf[32]; 863 #endif 864 865 pkt = NetTxPacket; 866 et = (Ethernet_t *)pkt; 867 868 /* NOTE: trigger sent not on any VLAN */ 869 870 /* form ethernet header */ 871 memcpy(et->et_dest, NetCDPAddr, 6); 872 memcpy(et->et_src, NetOurEther, 6); 873 874 pkt += ETHER_HDR_SIZE; 875 876 /* SNAP header */ 877 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 878 pkt += sizeof(CDP_SNAP_hdr); 879 880 /* CDP header */ 881 *pkt++ = 0x02; /* CDP version 2 */ 882 *pkt++ = 180; /* TTL */ 883 s = (volatile ushort *)pkt; 884 cp = s; 885 *s++ = htons(0); /* checksum (0 for later calculation) */ 886 887 /* CDP fields */ 888 #ifdef CONFIG_CDP_DEVICE_ID 889 *s++ = htons(CDP_DEVICE_ID_TLV); 890 *s++ = htons(CONFIG_CDP_DEVICE_ID); 891 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther); 892 memcpy((uchar *)s, buf, 16); 893 s += 16 / 2; 894 #endif 895 896 #ifdef CONFIG_CDP_PORT_ID 897 *s++ = htons(CDP_PORT_ID_TLV); 898 memset(buf, 0, sizeof(buf)); 899 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 900 len = strlen(buf); 901 if (len & 1) /* make it even */ 902 len++; 903 *s++ = htons(len + 4); 904 memcpy((uchar *)s, buf, len); 905 s += len / 2; 906 #endif 907 908 #ifdef CONFIG_CDP_CAPABILITIES 909 *s++ = htons(CDP_CAPABILITIES_TLV); 910 *s++ = htons(8); 911 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 912 s += 2; 913 #endif 914 915 #ifdef CONFIG_CDP_VERSION 916 *s++ = htons(CDP_VERSION_TLV); 917 memset(buf, 0, sizeof(buf)); 918 strcpy(buf, CONFIG_CDP_VERSION); 919 len = strlen(buf); 920 if (len & 1) /* make it even */ 921 len++; 922 *s++ = htons(len + 4); 923 memcpy((uchar *)s, buf, len); 924 s += len / 2; 925 #endif 926 927 #ifdef CONFIG_CDP_PLATFORM 928 *s++ = htons(CDP_PLATFORM_TLV); 929 memset(buf, 0, sizeof(buf)); 930 strcpy(buf, CONFIG_CDP_PLATFORM); 931 len = strlen(buf); 932 if (len & 1) /* make it even */ 933 len++; 934 *s++ = htons(len + 4); 935 memcpy((uchar *)s, buf, len); 936 s += len / 2; 937 #endif 938 939 #ifdef CONFIG_CDP_TRIGGER 940 *s++ = htons(CDP_TRIGGER_TLV); 941 *s++ = htons(8); 942 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 943 s += 2; 944 #endif 945 946 #ifdef CONFIG_CDP_POWER_CONSUMPTION 947 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 948 *s++ = htons(6); 949 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 950 #endif 951 952 /* length of ethernet packet */ 953 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 954 et->et_protlen = htons(len); 955 956 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 957 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 958 if (chksum == 0) 959 chksum = 0xFFFF; 960 *cp = htons(chksum); 961 962 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 963 return 0; 964 } 965 966 static void 967 CDPTimeout (void) 968 { 969 CDPSeq++; 970 971 if (CDPSeq < 3) { 972 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 973 CDPSendTrigger(); 974 return; 975 } 976 977 /* if not OK try again */ 978 if (!CDPOK) 979 NetStartAgain(); 980 else 981 NetState = NETLOOP_SUCCESS; 982 } 983 984 static void 985 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 986 { 987 /* nothing */ 988 } 989 990 static void 991 CDPHandler(const uchar * pkt, unsigned len) 992 { 993 const uchar *t; 994 const ushort *ss; 995 ushort type, tlen; 996 uchar applid; 997 ushort vlan, nvlan; 998 999 /* minimum size? */ 1000 if (len < sizeof(CDP_SNAP_hdr) + 4) 1001 goto pkt_short; 1002 1003 /* check for valid CDP SNAP header */ 1004 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1005 return; 1006 1007 pkt += sizeof(CDP_SNAP_hdr); 1008 len -= sizeof(CDP_SNAP_hdr); 1009 1010 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1011 if (pkt[0] < 0x02 || pkt[1] == 0) 1012 return; 1013 1014 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1015 if (pkt[0] != 0x02) 1016 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1017 pkt[0] & 0xff); 1018 1019 if (CDP_compute_csum(pkt, len) != 0) 1020 return; 1021 1022 pkt += 4; 1023 len -= 4; 1024 1025 vlan = htons(-1); 1026 nvlan = htons(-1); 1027 while (len > 0) { 1028 if (len < 4) 1029 goto pkt_short; 1030 1031 ss = (const ushort *)pkt; 1032 type = ntohs(ss[0]); 1033 tlen = ntohs(ss[1]); 1034 if (tlen > len) { 1035 goto pkt_short; 1036 } 1037 1038 pkt += tlen; 1039 len -= tlen; 1040 1041 ss += 2; /* point ss to the data of the TLV */ 1042 tlen -= 4; 1043 1044 switch (type) { 1045 case CDP_DEVICE_ID_TLV: 1046 break; 1047 case CDP_ADDRESS_TLV: 1048 break; 1049 case CDP_PORT_ID_TLV: 1050 break; 1051 case CDP_CAPABILITIES_TLV: 1052 break; 1053 case CDP_VERSION_TLV: 1054 break; 1055 case CDP_PLATFORM_TLV: 1056 break; 1057 case CDP_NATIVE_VLAN_TLV: 1058 nvlan = *ss; 1059 break; 1060 case CDP_APPLIANCE_VLAN_TLV: 1061 t = (const uchar *)ss; 1062 while (tlen > 0) { 1063 if (tlen < 3) 1064 goto pkt_short; 1065 1066 applid = t[0]; 1067 ss = (const ushort *)(t + 1); 1068 1069 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1070 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1071 vlan = *ss; 1072 #else 1073 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1074 #endif 1075 t += 3; tlen -= 3; 1076 } 1077 break; 1078 case CDP_TRIGGER_TLV: 1079 break; 1080 case CDP_POWER_CONSUMPTION_TLV: 1081 break; 1082 case CDP_SYSNAME_TLV: 1083 break; 1084 case CDP_SYSOBJECT_TLV: 1085 break; 1086 case CDP_MANAGEMENT_ADDRESS_TLV: 1087 break; 1088 } 1089 } 1090 1091 CDPApplianceVLAN = vlan; 1092 CDPNativeVLAN = nvlan; 1093 1094 CDPOK = 1; 1095 return; 1096 1097 pkt_short: 1098 printf("** CDP packet is too short\n"); 1099 return; 1100 } 1101 1102 static void CDPStart(void) 1103 { 1104 #if defined(CONFIG_NET_MULTI) 1105 printf ("Using %s device\n", eth_get_name()); 1106 #endif 1107 CDPSeq = 0; 1108 CDPOK = 0; 1109 1110 CDPNativeVLAN = htons(-1); 1111 CDPApplianceVLAN = htons(-1); 1112 1113 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1114 NetSetHandler (CDPDummyHandler); 1115 1116 CDPSendTrigger(); 1117 } 1118 #endif 1119 1120 1121 void 1122 NetReceive(volatile uchar * inpkt, int len) 1123 { 1124 Ethernet_t *et; 1125 IP_t *ip; 1126 ARP_t *arp; 1127 IPaddr_t tmp; 1128 int x; 1129 uchar *pkt; 1130 #if defined(CONFIG_CMD_CDP) 1131 int iscdp; 1132 #endif 1133 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1134 1135 #ifdef ET_DEBUG 1136 printf("packet received\n"); 1137 #endif 1138 1139 NetRxPacket = inpkt; 1140 NetRxPacketLen = len; 1141 et = (Ethernet_t *)inpkt; 1142 1143 /* too small packet? */ 1144 if (len < ETHER_HDR_SIZE) 1145 return; 1146 1147 #ifdef CONFIG_API 1148 if (push_packet) { 1149 (*push_packet)(inpkt, len); 1150 return; 1151 } 1152 #endif 1153 1154 #if defined(CONFIG_CMD_CDP) 1155 /* keep track if packet is CDP */ 1156 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1157 #endif 1158 1159 myvlanid = ntohs(NetOurVLAN); 1160 if (myvlanid == (ushort)-1) 1161 myvlanid = VLAN_NONE; 1162 mynvlanid = ntohs(NetOurNativeVLAN); 1163 if (mynvlanid == (ushort)-1) 1164 mynvlanid = VLAN_NONE; 1165 1166 x = ntohs(et->et_protlen); 1167 1168 #ifdef ET_DEBUG 1169 printf("packet received\n"); 1170 #endif 1171 1172 if (x < 1514) { 1173 /* 1174 * Got a 802 packet. Check the other protocol field. 1175 */ 1176 x = ntohs(et->et_prot); 1177 1178 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1179 len -= E802_HDR_SIZE; 1180 1181 } else if (x != PROT_VLAN) { /* normal packet */ 1182 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1183 len -= ETHER_HDR_SIZE; 1184 1185 } else { /* VLAN packet */ 1186 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1187 1188 #ifdef ET_DEBUG 1189 printf("VLAN packet received\n"); 1190 #endif 1191 /* too small packet? */ 1192 if (len < VLAN_ETHER_HDR_SIZE) 1193 return; 1194 1195 /* if no VLAN active */ 1196 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1197 #if defined(CONFIG_CMD_CDP) 1198 && iscdp == 0 1199 #endif 1200 ) 1201 return; 1202 1203 cti = ntohs(vet->vet_tag); 1204 vlanid = cti & VLAN_IDMASK; 1205 x = ntohs(vet->vet_type); 1206 1207 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1208 len -= VLAN_ETHER_HDR_SIZE; 1209 } 1210 1211 #ifdef ET_DEBUG 1212 printf("Receive from protocol 0x%x\n", x); 1213 #endif 1214 1215 #if defined(CONFIG_CMD_CDP) 1216 if (iscdp) { 1217 CDPHandler((uchar *)ip, len); 1218 return; 1219 } 1220 #endif 1221 1222 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1223 if (vlanid == VLAN_NONE) 1224 vlanid = (mynvlanid & VLAN_IDMASK); 1225 /* not matched? */ 1226 if (vlanid != (myvlanid & VLAN_IDMASK)) 1227 return; 1228 } 1229 1230 switch (x) { 1231 1232 case PROT_ARP: 1233 /* 1234 * We have to deal with two types of ARP packets: 1235 * - REQUEST packets will be answered by sending our 1236 * IP address - if we know it. 1237 * - REPLY packates are expected only after we asked 1238 * for the TFTP server's or the gateway's ethernet 1239 * address; so if we receive such a packet, we set 1240 * the server ethernet address 1241 */ 1242 #ifdef ET_DEBUG 1243 puts ("Got ARP\n"); 1244 #endif 1245 arp = (ARP_t *)ip; 1246 if (len < ARP_HDR_SIZE) { 1247 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1248 return; 1249 } 1250 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1251 return; 1252 } 1253 if (ntohs(arp->ar_pro) != PROT_IP) { 1254 return; 1255 } 1256 if (arp->ar_hln != 6) { 1257 return; 1258 } 1259 if (arp->ar_pln != 4) { 1260 return; 1261 } 1262 1263 if (NetOurIP == 0) { 1264 return; 1265 } 1266 1267 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1268 return; 1269 } 1270 1271 switch (ntohs(arp->ar_op)) { 1272 case ARPOP_REQUEST: /* reply with our IP address */ 1273 #ifdef ET_DEBUG 1274 puts ("Got ARP REQUEST, return our IP\n"); 1275 #endif 1276 pkt = (uchar *)et; 1277 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1278 arp->ar_op = htons(ARPOP_REPLY); 1279 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1280 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1281 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1282 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1283 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1284 return; 1285 1286 case ARPOP_REPLY: /* arp reply */ 1287 /* are we waiting for a reply */ 1288 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1289 break; 1290 1291 #ifdef CONFIG_KEEP_SERVERADDR 1292 if (NetServerIP == NetArpWaitPacketIP) { 1293 char buf[20]; 1294 sprintf(buf, "%pM", arp->ar_data); 1295 setenv("serveraddr", buf); 1296 } 1297 #endif 1298 1299 #ifdef ET_DEBUG 1300 printf("Got ARP REPLY, set server/gtwy eth addr (%pM)\n", 1301 arp->ar_data); 1302 #endif 1303 1304 tmp = NetReadIP(&arp->ar_data[6]); 1305 1306 /* matched waiting packet's address */ 1307 if (tmp == NetArpWaitReplyIP) { 1308 #ifdef ET_DEBUG 1309 puts ("Got it\n"); 1310 #endif 1311 /* save address for later use */ 1312 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1313 1314 #ifdef CONFIG_NETCONSOLE 1315 (*packetHandler)(0,0,0,0); 1316 #endif 1317 /* modify header, and transmit it */ 1318 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1319 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1320 1321 /* no arp request pending now */ 1322 NetArpWaitPacketIP = 0; 1323 NetArpWaitTxPacketSize = 0; 1324 NetArpWaitPacketMAC = NULL; 1325 1326 } 1327 return; 1328 default: 1329 #ifdef ET_DEBUG 1330 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1331 #endif 1332 return; 1333 } 1334 break; 1335 1336 case PROT_RARP: 1337 #ifdef ET_DEBUG 1338 puts ("Got RARP\n"); 1339 #endif 1340 arp = (ARP_t *)ip; 1341 if (len < ARP_HDR_SIZE) { 1342 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1343 return; 1344 } 1345 1346 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1347 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1348 (ntohs(arp->ar_pro) != PROT_IP) || 1349 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1350 1351 puts ("invalid RARP header\n"); 1352 } else { 1353 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1354 if (NetServerIP == 0) 1355 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1356 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1357 1358 (*packetHandler)(0,0,0,0); 1359 } 1360 break; 1361 1362 case PROT_IP: 1363 #ifdef ET_DEBUG 1364 puts ("Got IP\n"); 1365 #endif 1366 if (len < IP_HDR_SIZE) { 1367 debug ("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE); 1368 return; 1369 } 1370 if (len < ntohs(ip->ip_len)) { 1371 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1372 return; 1373 } 1374 len = ntohs(ip->ip_len); 1375 #ifdef ET_DEBUG 1376 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1377 #endif 1378 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1379 return; 1380 } 1381 /* Can't deal with fragments */ 1382 if (ip->ip_off & htons(IP_OFFS | IP_FLAGS_MFRAG)) { 1383 return; 1384 } 1385 /* can't deal with headers > 20 bytes */ 1386 if ((ip->ip_hl_v & 0x0f) > 0x05) { 1387 return; 1388 } 1389 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1390 puts ("checksum bad\n"); 1391 return; 1392 } 1393 tmp = NetReadIP(&ip->ip_dst); 1394 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1395 #ifdef CONFIG_MCAST_TFTP 1396 if (Mcast_addr != tmp) 1397 #endif 1398 return; 1399 } 1400 /* 1401 * watch for ICMP host redirects 1402 * 1403 * There is no real handler code (yet). We just watch 1404 * for ICMP host redirect messages. In case anybody 1405 * sees these messages: please contact me 1406 * (wd@denx.de), or - even better - send me the 1407 * necessary fixes :-) 1408 * 1409 * Note: in all cases where I have seen this so far 1410 * it was a problem with the router configuration, 1411 * for instance when a router was configured in the 1412 * BOOTP reply, but the TFTP server was on the same 1413 * subnet. So this is probably a warning that your 1414 * configuration might be wrong. But I'm not really 1415 * sure if there aren't any other situations. 1416 */ 1417 if (ip->ip_p == IPPROTO_ICMP) { 1418 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1419 1420 switch (icmph->type) { 1421 case ICMP_REDIRECT: 1422 if (icmph->code != ICMP_REDIR_HOST) 1423 return; 1424 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway); 1425 return; 1426 #if defined(CONFIG_CMD_PING) 1427 case ICMP_ECHO_REPLY: 1428 /* 1429 * IP header OK. Pass the packet to the current handler. 1430 */ 1431 /* XXX point to ip packet */ 1432 (*packetHandler)((uchar *)ip, 0, 0, 0); 1433 return; 1434 case ICMP_ECHO_REQUEST: 1435 #ifdef ET_DEBUG 1436 printf ("Got ICMP ECHO REQUEST, return %d bytes \n", 1437 ETHER_HDR_SIZE + len); 1438 #endif 1439 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1440 memcpy (&et->et_src[ 0], NetOurEther, 6); 1441 1442 ip->ip_sum = 0; 1443 ip->ip_off = 0; 1444 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1445 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1446 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1447 1448 icmph->type = ICMP_ECHO_REPLY; 1449 icmph->checksum = 0; 1450 icmph->checksum = ~NetCksum((uchar *)icmph, 1451 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1452 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1453 return; 1454 #endif 1455 default: 1456 return; 1457 } 1458 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1459 return; 1460 } 1461 1462 #ifdef CONFIG_UDP_CHECKSUM 1463 if (ip->udp_xsum != 0) { 1464 ulong xsum; 1465 ushort *sumptr; 1466 ushort sumlen; 1467 1468 xsum = ip->ip_p; 1469 xsum += (ntohs(ip->udp_len)); 1470 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1471 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1472 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1473 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1474 1475 sumlen = ntohs(ip->udp_len); 1476 sumptr = (ushort *) &(ip->udp_src); 1477 1478 while (sumlen > 1) { 1479 ushort sumdata; 1480 1481 sumdata = *sumptr++; 1482 xsum += ntohs(sumdata); 1483 sumlen -= 2; 1484 } 1485 if (sumlen > 0) { 1486 ushort sumdata; 1487 1488 sumdata = *(unsigned char *) sumptr; 1489 sumdata = (sumdata << 8) & 0xff00; 1490 xsum += sumdata; 1491 } 1492 while ((xsum >> 16) != 0) { 1493 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1494 } 1495 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1496 printf(" UDP wrong checksum %08lx %08x\n", 1497 xsum, ntohs(ip->udp_xsum)); 1498 return; 1499 } 1500 } 1501 #endif 1502 1503 1504 #ifdef CONFIG_NETCONSOLE 1505 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1506 ntohs(ip->udp_dst), 1507 ntohs(ip->udp_src), 1508 ntohs(ip->udp_len) - 8); 1509 #endif 1510 /* 1511 * IP header OK. Pass the packet to the current handler. 1512 */ 1513 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1514 ntohs(ip->udp_dst), 1515 ntohs(ip->udp_src), 1516 ntohs(ip->udp_len) - 8); 1517 break; 1518 } 1519 } 1520 1521 1522 /**********************************************************************/ 1523 1524 static int net_check_prereq (proto_t protocol) 1525 { 1526 switch (protocol) { 1527 /* Fall through */ 1528 #if defined(CONFIG_CMD_PING) 1529 case PING: 1530 if (NetPingIP == 0) { 1531 puts ("*** ERROR: ping address not given\n"); 1532 return (1); 1533 } 1534 goto common; 1535 #endif 1536 #if defined(CONFIG_CMD_SNTP) 1537 case SNTP: 1538 if (NetNtpServerIP == 0) { 1539 puts ("*** ERROR: NTP server address not given\n"); 1540 return (1); 1541 } 1542 goto common; 1543 #endif 1544 #if defined(CONFIG_CMD_DNS) 1545 case DNS: 1546 if (NetOurDNSIP == 0) { 1547 puts("*** ERROR: DNS server address not given\n"); 1548 return 1; 1549 } 1550 goto common; 1551 #endif 1552 #if defined(CONFIG_CMD_NFS) 1553 case NFS: 1554 #endif 1555 case NETCONS: 1556 case TFTP: 1557 if (NetServerIP == 0) { 1558 puts ("*** ERROR: `serverip' not set\n"); 1559 return (1); 1560 } 1561 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) 1562 common: 1563 #endif 1564 1565 if (NetOurIP == 0) { 1566 puts ("*** ERROR: `ipaddr' not set\n"); 1567 return (1); 1568 } 1569 /* Fall through */ 1570 1571 case DHCP: 1572 case RARP: 1573 case BOOTP: 1574 case CDP: 1575 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1576 #ifdef CONFIG_NET_MULTI 1577 extern int eth_get_dev_index (void); 1578 int num = eth_get_dev_index (); 1579 1580 switch (num) { 1581 case -1: 1582 puts ("*** ERROR: No ethernet found.\n"); 1583 return (1); 1584 case 0: 1585 puts ("*** ERROR: `ethaddr' not set\n"); 1586 break; 1587 default: 1588 printf ("*** ERROR: `eth%daddr' not set\n", 1589 num); 1590 break; 1591 } 1592 1593 NetStartAgain (); 1594 return (2); 1595 #else 1596 puts ("*** ERROR: `ethaddr' not set\n"); 1597 return (1); 1598 #endif 1599 } 1600 /* Fall through */ 1601 default: 1602 return (0); 1603 } 1604 return (0); /* OK */ 1605 } 1606 /**********************************************************************/ 1607 1608 int 1609 NetCksumOk(uchar * ptr, int len) 1610 { 1611 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1612 } 1613 1614 1615 unsigned 1616 NetCksum(uchar * ptr, int len) 1617 { 1618 ulong xsum; 1619 ushort *p = (ushort *)ptr; 1620 1621 xsum = 0; 1622 while (len-- > 0) 1623 xsum += *p++; 1624 xsum = (xsum & 0xffff) + (xsum >> 16); 1625 xsum = (xsum & 0xffff) + (xsum >> 16); 1626 return (xsum & 0xffff); 1627 } 1628 1629 int 1630 NetEthHdrSize(void) 1631 { 1632 ushort myvlanid; 1633 1634 myvlanid = ntohs(NetOurVLAN); 1635 if (myvlanid == (ushort)-1) 1636 myvlanid = VLAN_NONE; 1637 1638 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1639 } 1640 1641 int 1642 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1643 { 1644 Ethernet_t *et = (Ethernet_t *)xet; 1645 ushort myvlanid; 1646 1647 myvlanid = ntohs(NetOurVLAN); 1648 if (myvlanid == (ushort)-1) 1649 myvlanid = VLAN_NONE; 1650 1651 memcpy (et->et_dest, addr, 6); 1652 memcpy (et->et_src, NetOurEther, 6); 1653 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1654 et->et_protlen = htons(prot); 1655 return ETHER_HDR_SIZE; 1656 } else { 1657 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1658 1659 vet->vet_vlan_type = htons(PROT_VLAN); 1660 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1661 vet->vet_type = htons(prot); 1662 return VLAN_ETHER_HDR_SIZE; 1663 } 1664 } 1665 1666 void 1667 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1668 { 1669 IP_t *ip = (IP_t *)xip; 1670 1671 /* 1672 * If the data is an odd number of bytes, zero the 1673 * byte after the last byte so that the checksum 1674 * will work. 1675 */ 1676 if (len & 1) 1677 xip[IP_HDR_SIZE + len] = 0; 1678 1679 /* 1680 * Construct an IP and UDP header. 1681 * (need to set no fragment bit - XXX) 1682 */ 1683 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1684 ip->ip_tos = 0; 1685 ip->ip_len = htons(IP_HDR_SIZE + len); 1686 ip->ip_id = htons(NetIPID++); 1687 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1688 ip->ip_ttl = 255; 1689 ip->ip_p = 17; /* UDP */ 1690 ip->ip_sum = 0; 1691 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1692 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1693 ip->udp_src = htons(sport); 1694 ip->udp_dst = htons(dport); 1695 ip->udp_len = htons(8 + len); 1696 ip->udp_xsum = 0; 1697 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1698 } 1699 1700 void copy_filename (char *dst, char *src, int size) 1701 { 1702 if (*src && (*src == '"')) { 1703 ++src; 1704 --size; 1705 } 1706 1707 while ((--size > 0) && *src && (*src != '"')) { 1708 *dst++ = *src++; 1709 } 1710 *dst = '\0'; 1711 } 1712 1713 #endif 1714 1715 #if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS) 1716 /* 1717 * make port a little random, but use something trivial to compute 1718 */ 1719 unsigned int random_port(void) 1720 { 1721 return 1024 + (get_timer(0) % 0x8000);; 1722 } 1723 #endif 1724 1725 void ip_to_string (IPaddr_t x, char *s) 1726 { 1727 x = ntohl (x); 1728 sprintf (s, "%d.%d.%d.%d", 1729 (int) ((x >> 24) & 0xff), 1730 (int) ((x >> 16) & 0xff), 1731 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1732 ); 1733 } 1734 1735 IPaddr_t string_to_ip(char *s) 1736 { 1737 IPaddr_t addr; 1738 char *e; 1739 int i; 1740 1741 if (s == NULL) 1742 return(0); 1743 1744 for (addr=0, i=0; i<4; ++i) { 1745 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1746 addr <<= 8; 1747 addr |= (val & 0xFF); 1748 if (s) { 1749 s = (*e) ? e+1 : e; 1750 } 1751 } 1752 1753 return (htonl(addr)); 1754 } 1755 1756 void VLAN_to_string(ushort x, char *s) 1757 { 1758 x = ntohs(x); 1759 1760 if (x == (ushort)-1) 1761 x = VLAN_NONE; 1762 1763 if (x == VLAN_NONE) 1764 strcpy(s, "none"); 1765 else 1766 sprintf(s, "%d", x & VLAN_IDMASK); 1767 } 1768 1769 ushort string_to_VLAN(char *s) 1770 { 1771 ushort id; 1772 1773 if (s == NULL) 1774 return htons(VLAN_NONE); 1775 1776 if (*s < '0' || *s > '9') 1777 id = VLAN_NONE; 1778 else 1779 id = (ushort)simple_strtoul(s, NULL, 10); 1780 1781 return htons(id); 1782 } 1783 1784 IPaddr_t getenv_IPaddr (char *var) 1785 { 1786 return (string_to_ip(getenv(var))); 1787 } 1788 1789 ushort getenv_VLAN(char *var) 1790 { 1791 return (string_to_VLAN(getenv(var))); 1792 } 1793