1 /* 2 * Copied from Linux Monitor (LiMon) - Networking. 3 * 4 * Copyright 1994 - 2000 Neil Russell. 5 * (See License) 6 * Copyright 2000 Roland Borde 7 * Copyright 2000 Paolo Scaffardi 8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de 9 */ 10 11 /* 12 * General Desription: 13 * 14 * The user interface supports commands for BOOTP, RARP, and TFTP. 15 * Also, we support ARP internally. Depending on available data, 16 * these interact as follows: 17 * 18 * BOOTP: 19 * 20 * Prerequisites: - own ethernet address 21 * We want: - own IP address 22 * - TFTP server IP address 23 * - name of bootfile 24 * Next step: ARP 25 * 26 * RARP: 27 * 28 * Prerequisites: - own ethernet address 29 * We want: - own IP address 30 * - TFTP server IP address 31 * Next step: ARP 32 * 33 * ARP: 34 * 35 * Prerequisites: - own ethernet address 36 * - own IP address 37 * - TFTP server IP address 38 * We want: - TFTP server ethernet address 39 * Next step: TFTP 40 * 41 * DHCP: 42 * 43 * Prerequisites: - own ethernet address 44 * We want: - IP, Netmask, ServerIP, Gateway IP 45 * - bootfilename, lease time 46 * Next step: - TFTP 47 * 48 * TFTP: 49 * 50 * Prerequisites: - own ethernet address 51 * - own IP address 52 * - TFTP server IP address 53 * - TFTP server ethernet address 54 * - name of bootfile (if unknown, we use a default name 55 * derived from our own IP address) 56 * We want: - load the boot file 57 * Next step: none 58 * 59 * NFS: 60 * 61 * Prerequisites: - own ethernet address 62 * - own IP address 63 * - name of bootfile (if unknown, we use a default name 64 * derived from our own IP address) 65 * We want: - load the boot file 66 * Next step: none 67 * 68 * SNTP: 69 * 70 * Prerequisites: - own ethernet address 71 * - own IP address 72 * We want: - network time 73 * Next step: none 74 */ 75 76 77 #include <common.h> 78 #include <watchdog.h> 79 #include <command.h> 80 #include <net.h> 81 #include "bootp.h" 82 #include "tftp.h" 83 #include "rarp.h" 84 #include "nfs.h" 85 #ifdef CONFIG_STATUS_LED 86 #include <status_led.h> 87 #include <miiphy.h> 88 #endif 89 #if defined(CONFIG_CMD_SNTP) 90 #include "sntp.h" 91 #endif 92 #if defined(CONFIG_CDP_VERSION) 93 #include <timestamp.h> 94 #endif 95 96 #if defined(CONFIG_CMD_NET) 97 98 DECLARE_GLOBAL_DATA_PTR; 99 100 #ifndef CONFIG_ARP_TIMEOUT 101 # define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */ 102 #else 103 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT 104 #endif 105 106 107 #ifndef CONFIG_NET_RETRY_COUNT 108 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 109 #else 110 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT 111 #endif 112 113 #if 0 114 #define ET_DEBUG 115 #endif 116 117 /** BOOTP EXTENTIONS **/ 118 119 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 120 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 121 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 122 #if defined(CONFIG_BOOTP_DNS2) 123 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 124 #endif 125 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 126 char NetOurHostName[32]={0,}; /* Our hostname */ 127 char NetOurRootPath[64]={0,}; /* Our bootpath */ 128 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 129 130 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 131 IPaddr_t Mcast_addr; 132 #endif 133 134 /** END OF BOOTP EXTENTIONS **/ 135 136 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 137 uchar NetOurEther[6]; /* Our ethernet address */ 138 uchar NetServerEther[6] = /* Boot server enet address */ 139 { 0, 0, 0, 0, 0, 0 }; 140 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 141 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ 142 volatile uchar *NetRxPkt; /* Current receive packet */ 143 int NetRxPktLen; /* Current rx packet length */ 144 unsigned NetIPID; /* IP packet ID */ 145 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 146 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 147 uchar NetEtherNullAddr[6] = 148 { 0, 0, 0, 0, 0, 0 }; 149 #ifdef CONFIG_API 150 void (*push_packet)(volatile void *, int len) = 0; 151 #endif 152 #if defined(CONFIG_CMD_CDP) 153 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 154 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 155 #endif 156 int NetState; /* Network loop state */ 157 #ifdef CONFIG_NET_MULTI 158 int NetRestartWrap = 0; /* Tried all network devices */ 159 static int NetRestarted = 0; /* Network loop restarted */ 160 static int NetDevExists = 0; /* At least one device configured */ 161 #endif 162 163 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 164 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 165 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 166 167 char BootFile[128]; /* Boot File name */ 168 169 #if defined(CONFIG_CMD_PING) 170 IPaddr_t NetPingIP; /* the ip address to ping */ 171 172 static void PingStart(void); 173 #endif 174 175 #if defined(CONFIG_CMD_CDP) 176 static void CDPStart(void); 177 #endif 178 179 #if defined(CONFIG_CMD_SNTP) 180 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 181 int NetTimeOffset=0; /* offset time from UTC */ 182 #endif 183 184 #ifdef CONFIG_NETCONSOLE 185 void NcStart(void); 186 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 187 #endif 188 189 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 190 191 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 192 193 static rxhand_f *packetHandler; /* Current RX packet handler */ 194 static thand_f *timeHandler; /* Current timeout handler */ 195 static ulong timeStart; /* Time base value */ 196 static ulong timeDelta; /* Current timeout value */ 197 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 198 199 static int net_check_prereq (proto_t protocol); 200 201 /**********************************************************************/ 202 203 IPaddr_t NetArpWaitPacketIP; 204 IPaddr_t NetArpWaitReplyIP; 205 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 206 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 207 int NetArpWaitTxPacketSize; 208 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 209 ulong NetArpWaitTimerStart; 210 int NetArpWaitTry; 211 212 int env_changed_id = 0; 213 214 void ArpRequest (void) 215 { 216 int i; 217 volatile uchar *pkt; 218 ARP_t *arp; 219 220 #ifdef ET_DEBUG 221 printf ("ARP broadcast %d\n", NetArpWaitTry); 222 #endif 223 pkt = NetTxPacket; 224 225 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 226 227 arp = (ARP_t *) pkt; 228 229 arp->ar_hrd = htons (ARP_ETHER); 230 arp->ar_pro = htons (PROT_IP); 231 arp->ar_hln = 6; 232 arp->ar_pln = 4; 233 arp->ar_op = htons (ARPOP_REQUEST); 234 235 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 236 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 237 for (i = 10; i < 16; ++i) { 238 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 239 } 240 241 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 242 (NetOurIP & NetOurSubnetMask)) { 243 if (NetOurGatewayIP == 0) { 244 puts ("## Warning: gatewayip needed but not set\n"); 245 NetArpWaitReplyIP = NetArpWaitPacketIP; 246 } else { 247 NetArpWaitReplyIP = NetOurGatewayIP; 248 } 249 } else { 250 NetArpWaitReplyIP = NetArpWaitPacketIP; 251 } 252 253 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 254 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 255 } 256 257 void ArpTimeoutCheck(void) 258 { 259 ulong t; 260 261 if (!NetArpWaitPacketIP) 262 return; 263 264 t = get_timer(0); 265 266 /* check for arp timeout */ 267 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) { 268 NetArpWaitTry++; 269 270 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 271 puts ("\nARP Retry count exceeded; starting again\n"); 272 NetArpWaitTry = 0; 273 NetStartAgain(); 274 } else { 275 NetArpWaitTimerStart = t; 276 ArpRequest(); 277 } 278 } 279 } 280 281 int 282 NetInitLoop(proto_t protocol) 283 { 284 bd_t *bd = gd->bd; 285 int env_id = get_env_id (); 286 287 /* update only when the environment has changed */ 288 if (env_changed_id == env_id) 289 return 0; 290 291 switch (protocol) { 292 #if defined(CONFIG_CMD_NFS) 293 case NFS: 294 #endif 295 #if defined(CONFIG_CMD_PING) 296 case PING: 297 #endif 298 #if defined(CONFIG_CMD_SNTP) 299 case SNTP: 300 #endif 301 case NETCONS: 302 case TFTP: 303 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 304 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 305 NetOurSubnetMask= getenv_IPaddr ("netmask"); 306 NetOurVLAN = getenv_VLAN("vlan"); 307 NetOurNativeVLAN = getenv_VLAN("nvlan"); 308 309 switch (protocol) { 310 #if defined(CONFIG_CMD_NFS) 311 case NFS: 312 #endif 313 case NETCONS: 314 case TFTP: 315 NetServerIP = getenv_IPaddr ("serverip"); 316 break; 317 #if defined(CONFIG_CMD_PING) 318 case PING: 319 /* nothing */ 320 break; 321 #endif 322 #if defined(CONFIG_CMD_SNTP) 323 case SNTP: 324 /* nothing */ 325 break; 326 #endif 327 default: 328 break; 329 } 330 331 break; 332 case BOOTP: 333 case RARP: 334 /* 335 * initialize our IP addr to 0 in order to accept ANY 336 * IP addr assigned to us by the BOOTP / RARP server 337 */ 338 NetOurIP = 0; 339 NetServerIP = getenv_IPaddr ("serverip"); 340 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 341 NetOurNativeVLAN = getenv_VLAN("nvlan"); 342 case CDP: 343 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 344 NetOurNativeVLAN = getenv_VLAN("nvlan"); 345 break; 346 default: 347 break; 348 } 349 env_changed_id = env_id; 350 return 0; 351 } 352 353 /**********************************************************************/ 354 /* 355 * Main network processing loop. 356 */ 357 358 int 359 NetLoop(proto_t protocol) 360 { 361 bd_t *bd = gd->bd; 362 363 #ifdef CONFIG_NET_MULTI 364 NetRestarted = 0; 365 NetDevExists = 0; 366 #endif 367 368 /* XXX problem with bss workaround */ 369 NetArpWaitPacketMAC = NULL; 370 NetArpWaitTxPacket = NULL; 371 NetArpWaitPacketIP = 0; 372 NetArpWaitReplyIP = 0; 373 NetArpWaitTxPacket = NULL; 374 NetTxPacket = NULL; 375 376 if (!NetTxPacket) { 377 int i; 378 /* 379 * Setup packet buffers, aligned correctly. 380 */ 381 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 382 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 383 for (i = 0; i < PKTBUFSRX; i++) { 384 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 385 } 386 } 387 388 if (!NetArpWaitTxPacket) { 389 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 390 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 391 NetArpWaitTxPacketSize = 0; 392 } 393 394 eth_halt(); 395 #ifdef CONFIG_NET_MULTI 396 eth_set_current(); 397 #endif 398 if (eth_init(bd) < 0) { 399 eth_halt(); 400 return(-1); 401 } 402 403 restart: 404 #ifdef CONFIG_NET_MULTI 405 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 406 #else 407 eth_getenv_enetaddr("ethaddr", NetOurEther); 408 #endif 409 410 NetState = NETLOOP_CONTINUE; 411 412 /* 413 * Start the ball rolling with the given start function. From 414 * here on, this code is a state machine driven by received 415 * packets and timer events. 416 */ 417 NetInitLoop(protocol); 418 419 switch (net_check_prereq (protocol)) { 420 case 1: 421 /* network not configured */ 422 eth_halt(); 423 return (-1); 424 425 #ifdef CONFIG_NET_MULTI 426 case 2: 427 /* network device not configured */ 428 break; 429 #endif /* CONFIG_NET_MULTI */ 430 431 case 0: 432 #ifdef CONFIG_NET_MULTI 433 NetDevExists = 1; 434 #endif 435 switch (protocol) { 436 case TFTP: 437 /* always use ARP to get server ethernet address */ 438 TftpStart(); 439 break; 440 441 #if defined(CONFIG_CMD_DHCP) 442 case DHCP: 443 /* Start with a clean slate... */ 444 BootpTry = 0; 445 NetOurIP = 0; 446 NetServerIP = getenv_IPaddr ("serverip"); 447 DhcpRequest(); /* Basically same as BOOTP */ 448 break; 449 #endif 450 451 case BOOTP: 452 BootpTry = 0; 453 BootpRequest (); 454 break; 455 456 case RARP: 457 RarpTry = 0; 458 RarpRequest (); 459 break; 460 #if defined(CONFIG_CMD_PING) 461 case PING: 462 PingStart(); 463 break; 464 #endif 465 #if defined(CONFIG_CMD_NFS) 466 case NFS: 467 NfsStart(); 468 break; 469 #endif 470 #if defined(CONFIG_CMD_CDP) 471 case CDP: 472 CDPStart(); 473 break; 474 #endif 475 #ifdef CONFIG_NETCONSOLE 476 case NETCONS: 477 NcStart(); 478 break; 479 #endif 480 #if defined(CONFIG_CMD_SNTP) 481 case SNTP: 482 SntpStart(); 483 break; 484 #endif 485 default: 486 break; 487 } 488 489 NetBootFileXferSize = 0; 490 break; 491 } 492 493 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 494 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 495 /* 496 * Echo the inverted link state to the fault LED. 497 */ 498 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { 499 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 500 } else { 501 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 502 } 503 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 504 #endif /* CONFIG_MII, ... */ 505 506 /* 507 * Main packet reception loop. Loop receiving packets until 508 * someone sets `NetState' to a state that terminates. 509 */ 510 for (;;) { 511 WATCHDOG_RESET(); 512 #ifdef CONFIG_SHOW_ACTIVITY 513 { 514 extern void show_activity(int arg); 515 show_activity(1); 516 } 517 #endif 518 /* 519 * Check the ethernet for a new packet. The ethernet 520 * receive routine will process it. 521 */ 522 eth_rx(); 523 524 /* 525 * Abort if ctrl-c was pressed. 526 */ 527 if (ctrlc()) { 528 eth_halt(); 529 puts ("\nAbort\n"); 530 return (-1); 531 } 532 533 ArpTimeoutCheck(); 534 535 /* 536 * Check for a timeout, and run the timeout handler 537 * if we have one. 538 */ 539 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 540 thand_f *x; 541 542 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 543 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 544 defined(CONFIG_STATUS_LED) && \ 545 defined(STATUS_LED_RED) 546 /* 547 * Echo the inverted link state to the fault LED. 548 */ 549 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { 550 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 551 } else { 552 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 553 } 554 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 555 #endif /* CONFIG_MII, ... */ 556 x = timeHandler; 557 timeHandler = (thand_f *)0; 558 (*x)(); 559 } 560 561 562 switch (NetState) { 563 564 case NETLOOP_RESTART: 565 #ifdef CONFIG_NET_MULTI 566 NetRestarted = 1; 567 #endif 568 goto restart; 569 570 case NETLOOP_SUCCESS: 571 if (NetBootFileXferSize > 0) { 572 char buf[20]; 573 printf("Bytes transferred = %ld (%lx hex)\n", 574 NetBootFileXferSize, 575 NetBootFileXferSize); 576 sprintf(buf, "%lX", NetBootFileXferSize); 577 setenv("filesize", buf); 578 579 sprintf(buf, "%lX", (unsigned long)load_addr); 580 setenv("fileaddr", buf); 581 } 582 eth_halt(); 583 return NetBootFileXferSize; 584 585 case NETLOOP_FAIL: 586 return (-1); 587 } 588 } 589 } 590 591 /**********************************************************************/ 592 593 static void 594 startAgainTimeout(void) 595 { 596 NetState = NETLOOP_RESTART; 597 } 598 599 static void 600 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 601 { 602 /* Totally ignore the packet */ 603 } 604 605 void NetStartAgain (void) 606 { 607 char *nretry; 608 int noretry = 0, once = 0; 609 610 if ((nretry = getenv ("netretry")) != NULL) { 611 noretry = (strcmp (nretry, "no") == 0); 612 once = (strcmp (nretry, "once") == 0); 613 } 614 if (noretry) { 615 eth_halt (); 616 NetState = NETLOOP_FAIL; 617 return; 618 } 619 #ifndef CONFIG_NET_MULTI 620 NetSetTimeout (10000UL, startAgainTimeout); 621 NetSetHandler (startAgainHandler); 622 #else /* !CONFIG_NET_MULTI*/ 623 eth_halt (); 624 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 625 eth_try_another (!NetRestarted); 626 #endif 627 eth_init (gd->bd); 628 if (NetRestartWrap) { 629 NetRestartWrap = 0; 630 if (NetDevExists && !once) { 631 NetSetTimeout (10000UL, startAgainTimeout); 632 NetSetHandler (startAgainHandler); 633 } else { 634 NetState = NETLOOP_FAIL; 635 } 636 } else { 637 NetState = NETLOOP_RESTART; 638 } 639 #endif /* CONFIG_NET_MULTI */ 640 } 641 642 /**********************************************************************/ 643 /* 644 * Miscelaneous bits. 645 */ 646 647 void 648 NetSetHandler(rxhand_f * f) 649 { 650 packetHandler = f; 651 } 652 653 654 void 655 NetSetTimeout(ulong iv, thand_f * f) 656 { 657 if (iv == 0) { 658 timeHandler = (thand_f *)0; 659 } else { 660 timeHandler = f; 661 timeStart = get_timer(0); 662 timeDelta = iv; 663 } 664 } 665 666 667 void 668 NetSendPacket(volatile uchar * pkt, int len) 669 { 670 (void) eth_send(pkt, len); 671 } 672 673 int 674 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 675 { 676 uchar *pkt; 677 678 /* convert to new style broadcast */ 679 if (dest == 0) 680 dest = 0xFFFFFFFF; 681 682 /* if broadcast, make the ether address a broadcast and don't do ARP */ 683 if (dest == 0xFFFFFFFF) 684 ether = NetBcastAddr; 685 686 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 687 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 688 689 #ifdef ET_DEBUG 690 printf("sending ARP for %08lx\n", dest); 691 #endif 692 NetArpWaitPacketIP = dest; 693 NetArpWaitPacketMAC = ether; 694 695 pkt = NetArpWaitTxPacket; 696 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 697 698 NetSetIP (pkt, dest, dport, sport, len); 699 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 700 701 /* size of the waiting packet */ 702 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 703 704 /* and do the ARP request */ 705 NetArpWaitTry = 1; 706 NetArpWaitTimerStart = get_timer(0); 707 ArpRequest(); 708 return 1; /* waiting */ 709 } 710 711 #ifdef ET_DEBUG 712 printf("sending UDP to %08lx/%pM\n", dest, ether); 713 #endif 714 715 pkt = (uchar *)NetTxPacket; 716 pkt += NetSetEther (pkt, ether, PROT_IP); 717 NetSetIP (pkt, dest, dport, sport, len); 718 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 719 720 return 0; /* transmitted */ 721 } 722 723 #if defined(CONFIG_CMD_PING) 724 static ushort PingSeqNo; 725 726 int PingSend(void) 727 { 728 static uchar mac[6]; 729 volatile IP_t *ip; 730 volatile ushort *s; 731 uchar *pkt; 732 733 /* XXX always send arp request */ 734 735 memcpy(mac, NetEtherNullAddr, 6); 736 737 #ifdef ET_DEBUG 738 printf("sending ARP for %08lx\n", NetPingIP); 739 #endif 740 741 NetArpWaitPacketIP = NetPingIP; 742 NetArpWaitPacketMAC = mac; 743 744 pkt = NetArpWaitTxPacket; 745 pkt += NetSetEther(pkt, mac, PROT_IP); 746 747 ip = (volatile IP_t *)pkt; 748 749 /* 750 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 751 */ 752 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 753 ip->ip_tos = 0; 754 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 755 ip->ip_id = htons(NetIPID++); 756 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 757 ip->ip_ttl = 255; 758 ip->ip_p = 0x01; /* ICMP */ 759 ip->ip_sum = 0; 760 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 761 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 762 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 763 764 s = &ip->udp_src; /* XXX ICMP starts here */ 765 s[0] = htons(0x0800); /* echo-request, code */ 766 s[1] = 0; /* checksum */ 767 s[2] = 0; /* identifier */ 768 s[3] = htons(PingSeqNo++); /* sequence number */ 769 s[1] = ~NetCksum((uchar *)s, 8/2); 770 771 /* size of the waiting packet */ 772 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 773 774 /* and do the ARP request */ 775 NetArpWaitTry = 1; 776 NetArpWaitTimerStart = get_timer(0); 777 ArpRequest(); 778 return 1; /* waiting */ 779 } 780 781 static void 782 PingTimeout (void) 783 { 784 eth_halt(); 785 NetState = NETLOOP_FAIL; /* we did not get the reply */ 786 } 787 788 static void 789 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 790 { 791 IPaddr_t tmp; 792 volatile IP_t *ip = (volatile IP_t *)pkt; 793 794 tmp = NetReadIP((void *)&ip->ip_src); 795 if (tmp != NetPingIP) 796 return; 797 798 NetState = NETLOOP_SUCCESS; 799 } 800 801 static void PingStart(void) 802 { 803 #if defined(CONFIG_NET_MULTI) 804 printf ("Using %s device\n", eth_get_name()); 805 #endif /* CONFIG_NET_MULTI */ 806 NetSetTimeout (10000UL, PingTimeout); 807 NetSetHandler (PingHandler); 808 809 PingSend(); 810 } 811 #endif 812 813 #if defined(CONFIG_CMD_CDP) 814 815 #define CDP_DEVICE_ID_TLV 0x0001 816 #define CDP_ADDRESS_TLV 0x0002 817 #define CDP_PORT_ID_TLV 0x0003 818 #define CDP_CAPABILITIES_TLV 0x0004 819 #define CDP_VERSION_TLV 0x0005 820 #define CDP_PLATFORM_TLV 0x0006 821 #define CDP_NATIVE_VLAN_TLV 0x000a 822 #define CDP_APPLIANCE_VLAN_TLV 0x000e 823 #define CDP_TRIGGER_TLV 0x000f 824 #define CDP_POWER_CONSUMPTION_TLV 0x0010 825 #define CDP_SYSNAME_TLV 0x0014 826 #define CDP_SYSOBJECT_TLV 0x0015 827 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 828 829 #define CDP_TIMEOUT 250UL /* one packet every 250ms */ 830 831 static int CDPSeq; 832 static int CDPOK; 833 834 ushort CDPNativeVLAN; 835 ushort CDPApplianceVLAN; 836 837 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 838 839 static ushort CDP_compute_csum(const uchar *buff, ushort len) 840 { 841 ushort csum; 842 int odd; 843 ulong result = 0; 844 ushort leftover; 845 ushort *p; 846 847 if (len > 0) { 848 odd = 1 & (ulong)buff; 849 if (odd) { 850 result = *buff << 8; 851 len--; 852 buff++; 853 } 854 while (len > 1) { 855 p = (ushort *)buff; 856 result += *p++; 857 buff = (uchar *)p; 858 if (result & 0x80000000) 859 result = (result & 0xFFFF) + (result >> 16); 860 len -= 2; 861 } 862 if (len) { 863 leftover = (signed short)(*(const signed char *)buff); 864 /* CISCO SUCKS big time! (and blows too): 865 * CDP uses the IP checksum algorithm with a twist; 866 * for the last byte it *sign* extends and sums. 867 */ 868 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 869 } 870 while (result >> 16) 871 result = (result & 0xFFFF) + (result >> 16); 872 873 if (odd) 874 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 875 } 876 877 /* add up 16-bit and 17-bit words for 17+c bits */ 878 result = (result & 0xffff) + (result >> 16); 879 /* add up 16-bit and 2-bit for 16+c bit */ 880 result = (result & 0xffff) + (result >> 16); 881 /* add up carry.. */ 882 result = (result & 0xffff) + (result >> 16); 883 884 /* negate */ 885 csum = ~(ushort)result; 886 887 /* run time endian detection */ 888 if (csum != htons(csum)) /* little endian */ 889 csum = htons(csum); 890 891 return csum; 892 } 893 894 int CDPSendTrigger(void) 895 { 896 volatile uchar *pkt; 897 volatile ushort *s; 898 volatile ushort *cp; 899 Ethernet_t *et; 900 int len; 901 ushort chksum; 902 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 903 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 904 char buf[32]; 905 #endif 906 907 pkt = NetTxPacket; 908 et = (Ethernet_t *)pkt; 909 910 /* NOTE: trigger sent not on any VLAN */ 911 912 /* form ethernet header */ 913 memcpy(et->et_dest, NetCDPAddr, 6); 914 memcpy(et->et_src, NetOurEther, 6); 915 916 pkt += ETHER_HDR_SIZE; 917 918 /* SNAP header */ 919 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 920 pkt += sizeof(CDP_SNAP_hdr); 921 922 /* CDP header */ 923 *pkt++ = 0x02; /* CDP version 2 */ 924 *pkt++ = 180; /* TTL */ 925 s = (volatile ushort *)pkt; 926 cp = s; 927 *s++ = htons(0); /* checksum (0 for later calculation) */ 928 929 /* CDP fields */ 930 #ifdef CONFIG_CDP_DEVICE_ID 931 *s++ = htons(CDP_DEVICE_ID_TLV); 932 *s++ = htons(CONFIG_CDP_DEVICE_ID); 933 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther); 934 memcpy((uchar *)s, buf, 16); 935 s += 16 / 2; 936 #endif 937 938 #ifdef CONFIG_CDP_PORT_ID 939 *s++ = htons(CDP_PORT_ID_TLV); 940 memset(buf, 0, sizeof(buf)); 941 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 942 len = strlen(buf); 943 if (len & 1) /* make it even */ 944 len++; 945 *s++ = htons(len + 4); 946 memcpy((uchar *)s, buf, len); 947 s += len / 2; 948 #endif 949 950 #ifdef CONFIG_CDP_CAPABILITIES 951 *s++ = htons(CDP_CAPABILITIES_TLV); 952 *s++ = htons(8); 953 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 954 s += 2; 955 #endif 956 957 #ifdef CONFIG_CDP_VERSION 958 *s++ = htons(CDP_VERSION_TLV); 959 memset(buf, 0, sizeof(buf)); 960 strcpy(buf, CONFIG_CDP_VERSION); 961 len = strlen(buf); 962 if (len & 1) /* make it even */ 963 len++; 964 *s++ = htons(len + 4); 965 memcpy((uchar *)s, buf, len); 966 s += len / 2; 967 #endif 968 969 #ifdef CONFIG_CDP_PLATFORM 970 *s++ = htons(CDP_PLATFORM_TLV); 971 memset(buf, 0, sizeof(buf)); 972 strcpy(buf, CONFIG_CDP_PLATFORM); 973 len = strlen(buf); 974 if (len & 1) /* make it even */ 975 len++; 976 *s++ = htons(len + 4); 977 memcpy((uchar *)s, buf, len); 978 s += len / 2; 979 #endif 980 981 #ifdef CONFIG_CDP_TRIGGER 982 *s++ = htons(CDP_TRIGGER_TLV); 983 *s++ = htons(8); 984 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 985 s += 2; 986 #endif 987 988 #ifdef CONFIG_CDP_POWER_CONSUMPTION 989 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 990 *s++ = htons(6); 991 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 992 #endif 993 994 /* length of ethernet packet */ 995 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 996 et->et_protlen = htons(len); 997 998 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 999 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 1000 if (chksum == 0) 1001 chksum = 0xFFFF; 1002 *cp = htons(chksum); 1003 1004 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 1005 return 0; 1006 } 1007 1008 static void 1009 CDPTimeout (void) 1010 { 1011 CDPSeq++; 1012 1013 if (CDPSeq < 3) { 1014 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1015 CDPSendTrigger(); 1016 return; 1017 } 1018 1019 /* if not OK try again */ 1020 if (!CDPOK) 1021 NetStartAgain(); 1022 else 1023 NetState = NETLOOP_SUCCESS; 1024 } 1025 1026 static void 1027 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 1028 { 1029 /* nothing */ 1030 } 1031 1032 static void 1033 CDPHandler(const uchar * pkt, unsigned len) 1034 { 1035 const uchar *t; 1036 const ushort *ss; 1037 ushort type, tlen; 1038 uchar applid; 1039 ushort vlan, nvlan; 1040 1041 /* minimum size? */ 1042 if (len < sizeof(CDP_SNAP_hdr) + 4) 1043 goto pkt_short; 1044 1045 /* check for valid CDP SNAP header */ 1046 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1047 return; 1048 1049 pkt += sizeof(CDP_SNAP_hdr); 1050 len -= sizeof(CDP_SNAP_hdr); 1051 1052 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1053 if (pkt[0] < 0x02 || pkt[1] == 0) 1054 return; 1055 1056 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1057 if (pkt[0] != 0x02) 1058 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1059 pkt[0] & 0xff); 1060 1061 if (CDP_compute_csum(pkt, len) != 0) 1062 return; 1063 1064 pkt += 4; 1065 len -= 4; 1066 1067 vlan = htons(-1); 1068 nvlan = htons(-1); 1069 while (len > 0) { 1070 if (len < 4) 1071 goto pkt_short; 1072 1073 ss = (const ushort *)pkt; 1074 type = ntohs(ss[0]); 1075 tlen = ntohs(ss[1]); 1076 if (tlen > len) { 1077 goto pkt_short; 1078 } 1079 1080 pkt += tlen; 1081 len -= tlen; 1082 1083 ss += 2; /* point ss to the data of the TLV */ 1084 tlen -= 4; 1085 1086 switch (type) { 1087 case CDP_DEVICE_ID_TLV: 1088 break; 1089 case CDP_ADDRESS_TLV: 1090 break; 1091 case CDP_PORT_ID_TLV: 1092 break; 1093 case CDP_CAPABILITIES_TLV: 1094 break; 1095 case CDP_VERSION_TLV: 1096 break; 1097 case CDP_PLATFORM_TLV: 1098 break; 1099 case CDP_NATIVE_VLAN_TLV: 1100 nvlan = *ss; 1101 break; 1102 case CDP_APPLIANCE_VLAN_TLV: 1103 t = (const uchar *)ss; 1104 while (tlen > 0) { 1105 if (tlen < 3) 1106 goto pkt_short; 1107 1108 applid = t[0]; 1109 ss = (const ushort *)(t + 1); 1110 1111 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1112 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1113 vlan = *ss; 1114 #else 1115 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1116 #endif 1117 t += 3; tlen -= 3; 1118 } 1119 break; 1120 case CDP_TRIGGER_TLV: 1121 break; 1122 case CDP_POWER_CONSUMPTION_TLV: 1123 break; 1124 case CDP_SYSNAME_TLV: 1125 break; 1126 case CDP_SYSOBJECT_TLV: 1127 break; 1128 case CDP_MANAGEMENT_ADDRESS_TLV: 1129 break; 1130 } 1131 } 1132 1133 CDPApplianceVLAN = vlan; 1134 CDPNativeVLAN = nvlan; 1135 1136 CDPOK = 1; 1137 return; 1138 1139 pkt_short: 1140 printf("** CDP packet is too short\n"); 1141 return; 1142 } 1143 1144 static void CDPStart(void) 1145 { 1146 #if defined(CONFIG_NET_MULTI) 1147 printf ("Using %s device\n", eth_get_name()); 1148 #endif 1149 CDPSeq = 0; 1150 CDPOK = 0; 1151 1152 CDPNativeVLAN = htons(-1); 1153 CDPApplianceVLAN = htons(-1); 1154 1155 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1156 NetSetHandler (CDPDummyHandler); 1157 1158 CDPSendTrigger(); 1159 } 1160 #endif 1161 1162 1163 void 1164 NetReceive(volatile uchar * inpkt, int len) 1165 { 1166 Ethernet_t *et; 1167 IP_t *ip; 1168 ARP_t *arp; 1169 IPaddr_t tmp; 1170 int x; 1171 uchar *pkt; 1172 #if defined(CONFIG_CMD_CDP) 1173 int iscdp; 1174 #endif 1175 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1176 1177 #ifdef ET_DEBUG 1178 printf("packet received\n"); 1179 #endif 1180 1181 NetRxPkt = inpkt; 1182 NetRxPktLen = len; 1183 et = (Ethernet_t *)inpkt; 1184 1185 /* too small packet? */ 1186 if (len < ETHER_HDR_SIZE) 1187 return; 1188 1189 #ifdef CONFIG_API 1190 if (push_packet) { 1191 (*push_packet)(inpkt, len); 1192 return; 1193 } 1194 #endif 1195 1196 #if defined(CONFIG_CMD_CDP) 1197 /* keep track if packet is CDP */ 1198 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1199 #endif 1200 1201 myvlanid = ntohs(NetOurVLAN); 1202 if (myvlanid == (ushort)-1) 1203 myvlanid = VLAN_NONE; 1204 mynvlanid = ntohs(NetOurNativeVLAN); 1205 if (mynvlanid == (ushort)-1) 1206 mynvlanid = VLAN_NONE; 1207 1208 x = ntohs(et->et_protlen); 1209 1210 #ifdef ET_DEBUG 1211 printf("packet received\n"); 1212 #endif 1213 1214 if (x < 1514) { 1215 /* 1216 * Got a 802 packet. Check the other protocol field. 1217 */ 1218 x = ntohs(et->et_prot); 1219 1220 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1221 len -= E802_HDR_SIZE; 1222 1223 } else if (x != PROT_VLAN) { /* normal packet */ 1224 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1225 len -= ETHER_HDR_SIZE; 1226 1227 } else { /* VLAN packet */ 1228 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1229 1230 #ifdef ET_DEBUG 1231 printf("VLAN packet received\n"); 1232 #endif 1233 /* too small packet? */ 1234 if (len < VLAN_ETHER_HDR_SIZE) 1235 return; 1236 1237 /* if no VLAN active */ 1238 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1239 #if defined(CONFIG_CMD_CDP) 1240 && iscdp == 0 1241 #endif 1242 ) 1243 return; 1244 1245 cti = ntohs(vet->vet_tag); 1246 vlanid = cti & VLAN_IDMASK; 1247 x = ntohs(vet->vet_type); 1248 1249 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1250 len -= VLAN_ETHER_HDR_SIZE; 1251 } 1252 1253 #ifdef ET_DEBUG 1254 printf("Receive from protocol 0x%x\n", x); 1255 #endif 1256 1257 #if defined(CONFIG_CMD_CDP) 1258 if (iscdp) { 1259 CDPHandler((uchar *)ip, len); 1260 return; 1261 } 1262 #endif 1263 1264 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1265 if (vlanid == VLAN_NONE) 1266 vlanid = (mynvlanid & VLAN_IDMASK); 1267 /* not matched? */ 1268 if (vlanid != (myvlanid & VLAN_IDMASK)) 1269 return; 1270 } 1271 1272 switch (x) { 1273 1274 case PROT_ARP: 1275 /* 1276 * We have to deal with two types of ARP packets: 1277 * - REQUEST packets will be answered by sending our 1278 * IP address - if we know it. 1279 * - REPLY packates are expected only after we asked 1280 * for the TFTP server's or the gateway's ethernet 1281 * address; so if we receive such a packet, we set 1282 * the server ethernet address 1283 */ 1284 #ifdef ET_DEBUG 1285 puts ("Got ARP\n"); 1286 #endif 1287 arp = (ARP_t *)ip; 1288 if (len < ARP_HDR_SIZE) { 1289 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1290 return; 1291 } 1292 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1293 return; 1294 } 1295 if (ntohs(arp->ar_pro) != PROT_IP) { 1296 return; 1297 } 1298 if (arp->ar_hln != 6) { 1299 return; 1300 } 1301 if (arp->ar_pln != 4) { 1302 return; 1303 } 1304 1305 if (NetOurIP == 0) { 1306 return; 1307 } 1308 1309 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1310 return; 1311 } 1312 1313 switch (ntohs(arp->ar_op)) { 1314 case ARPOP_REQUEST: /* reply with our IP address */ 1315 #ifdef ET_DEBUG 1316 puts ("Got ARP REQUEST, return our IP\n"); 1317 #endif 1318 pkt = (uchar *)et; 1319 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1320 arp->ar_op = htons(ARPOP_REPLY); 1321 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1322 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1323 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1324 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1325 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1326 return; 1327 1328 case ARPOP_REPLY: /* arp reply */ 1329 /* are we waiting for a reply */ 1330 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1331 break; 1332 #ifdef ET_DEBUG 1333 printf("Got ARP REPLY, set server/gtwy eth addr (%pM)\n", 1334 arp->ar_data); 1335 #endif 1336 1337 tmp = NetReadIP(&arp->ar_data[6]); 1338 1339 /* matched waiting packet's address */ 1340 if (tmp == NetArpWaitReplyIP) { 1341 #ifdef ET_DEBUG 1342 puts ("Got it\n"); 1343 #endif 1344 /* save address for later use */ 1345 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1346 1347 #ifdef CONFIG_NETCONSOLE 1348 (*packetHandler)(0,0,0,0); 1349 #endif 1350 /* modify header, and transmit it */ 1351 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1352 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1353 1354 /* no arp request pending now */ 1355 NetArpWaitPacketIP = 0; 1356 NetArpWaitTxPacketSize = 0; 1357 NetArpWaitPacketMAC = NULL; 1358 1359 } 1360 return; 1361 default: 1362 #ifdef ET_DEBUG 1363 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1364 #endif 1365 return; 1366 } 1367 break; 1368 1369 case PROT_RARP: 1370 #ifdef ET_DEBUG 1371 puts ("Got RARP\n"); 1372 #endif 1373 arp = (ARP_t *)ip; 1374 if (len < ARP_HDR_SIZE) { 1375 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1376 return; 1377 } 1378 1379 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1380 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1381 (ntohs(arp->ar_pro) != PROT_IP) || 1382 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1383 1384 puts ("invalid RARP header\n"); 1385 } else { 1386 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1387 if (NetServerIP == 0) 1388 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1389 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1390 1391 (*packetHandler)(0,0,0,0); 1392 } 1393 break; 1394 1395 case PROT_IP: 1396 #ifdef ET_DEBUG 1397 puts ("Got IP\n"); 1398 #endif 1399 if (len < IP_HDR_SIZE) { 1400 debug ("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE); 1401 return; 1402 } 1403 if (len < ntohs(ip->ip_len)) { 1404 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1405 return; 1406 } 1407 len = ntohs(ip->ip_len); 1408 #ifdef ET_DEBUG 1409 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1410 #endif 1411 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1412 return; 1413 } 1414 /* Can't deal with fragments */ 1415 if (ip->ip_off & htons(IP_OFFS | IP_FLAGS_MFRAG)) { 1416 return; 1417 } 1418 /* can't deal with headers > 20 bytes */ 1419 if ((ip->ip_hl_v & 0x0f) > 0x05) { 1420 return; 1421 } 1422 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1423 puts ("checksum bad\n"); 1424 return; 1425 } 1426 tmp = NetReadIP(&ip->ip_dst); 1427 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1428 #ifdef CONFIG_MCAST_TFTP 1429 if (Mcast_addr != tmp) 1430 #endif 1431 return; 1432 } 1433 /* 1434 * watch for ICMP host redirects 1435 * 1436 * There is no real handler code (yet). We just watch 1437 * for ICMP host redirect messages. In case anybody 1438 * sees these messages: please contact me 1439 * (wd@denx.de), or - even better - send me the 1440 * necessary fixes :-) 1441 * 1442 * Note: in all cases where I have seen this so far 1443 * it was a problem with the router configuration, 1444 * for instance when a router was configured in the 1445 * BOOTP reply, but the TFTP server was on the same 1446 * subnet. So this is probably a warning that your 1447 * configuration might be wrong. But I'm not really 1448 * sure if there aren't any other situations. 1449 */ 1450 if (ip->ip_p == IPPROTO_ICMP) { 1451 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1452 1453 switch (icmph->type) { 1454 case ICMP_REDIRECT: 1455 if (icmph->code != ICMP_REDIR_HOST) 1456 return; 1457 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway); 1458 return; 1459 #if defined(CONFIG_CMD_PING) 1460 case ICMP_ECHO_REPLY: 1461 /* 1462 * IP header OK. Pass the packet to the current handler. 1463 */ 1464 /* XXX point to ip packet */ 1465 (*packetHandler)((uchar *)ip, 0, 0, 0); 1466 return; 1467 case ICMP_ECHO_REQUEST: 1468 #ifdef ET_DEBUG 1469 printf ("Got ICMP ECHO REQUEST, return %d bytes \n", 1470 ETHER_HDR_SIZE + len); 1471 #endif 1472 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1473 memcpy (&et->et_src[ 0], NetOurEther, 6); 1474 1475 ip->ip_sum = 0; 1476 ip->ip_off = 0; 1477 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1478 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1479 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1480 1481 icmph->type = ICMP_ECHO_REPLY; 1482 icmph->checksum = 0; 1483 icmph->checksum = ~NetCksum((uchar *)icmph, 1484 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1485 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1486 return; 1487 #endif 1488 default: 1489 return; 1490 } 1491 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1492 return; 1493 } 1494 1495 #ifdef CONFIG_UDP_CHECKSUM 1496 if (ip->udp_xsum != 0) { 1497 ulong xsum; 1498 ushort *sumptr; 1499 ushort sumlen; 1500 1501 xsum = ip->ip_p; 1502 xsum += (ntohs(ip->udp_len)); 1503 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1504 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1505 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1506 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1507 1508 sumlen = ntohs(ip->udp_len); 1509 sumptr = (ushort *) &(ip->udp_src); 1510 1511 while (sumlen > 1) { 1512 ushort sumdata; 1513 1514 sumdata = *sumptr++; 1515 xsum += ntohs(sumdata); 1516 sumlen -= 2; 1517 } 1518 if (sumlen > 0) { 1519 ushort sumdata; 1520 1521 sumdata = *(unsigned char *) sumptr; 1522 sumdata = (sumdata << 8) & 0xff00; 1523 xsum += sumdata; 1524 } 1525 while ((xsum >> 16) != 0) { 1526 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1527 } 1528 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1529 printf(" UDP wrong checksum %08lx %08x\n", 1530 xsum, ntohs(ip->udp_xsum)); 1531 return; 1532 } 1533 } 1534 #endif 1535 1536 1537 #ifdef CONFIG_NETCONSOLE 1538 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1539 ntohs(ip->udp_dst), 1540 ntohs(ip->udp_src), 1541 ntohs(ip->udp_len) - 8); 1542 #endif 1543 /* 1544 * IP header OK. Pass the packet to the current handler. 1545 */ 1546 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1547 ntohs(ip->udp_dst), 1548 ntohs(ip->udp_src), 1549 ntohs(ip->udp_len) - 8); 1550 break; 1551 } 1552 } 1553 1554 1555 /**********************************************************************/ 1556 1557 static int net_check_prereq (proto_t protocol) 1558 { 1559 switch (protocol) { 1560 /* Fall through */ 1561 #if defined(CONFIG_CMD_PING) 1562 case PING: 1563 if (NetPingIP == 0) { 1564 puts ("*** ERROR: ping address not given\n"); 1565 return (1); 1566 } 1567 goto common; 1568 #endif 1569 #if defined(CONFIG_CMD_SNTP) 1570 case SNTP: 1571 if (NetNtpServerIP == 0) { 1572 puts ("*** ERROR: NTP server address not given\n"); 1573 return (1); 1574 } 1575 goto common; 1576 #endif 1577 #if defined(CONFIG_CMD_NFS) 1578 case NFS: 1579 #endif 1580 case NETCONS: 1581 case TFTP: 1582 if (NetServerIP == 0) { 1583 puts ("*** ERROR: `serverip' not set\n"); 1584 return (1); 1585 } 1586 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) 1587 common: 1588 #endif 1589 1590 if (NetOurIP == 0) { 1591 puts ("*** ERROR: `ipaddr' not set\n"); 1592 return (1); 1593 } 1594 /* Fall through */ 1595 1596 case DHCP: 1597 case RARP: 1598 case BOOTP: 1599 case CDP: 1600 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1601 #ifdef CONFIG_NET_MULTI 1602 extern int eth_get_dev_index (void); 1603 int num = eth_get_dev_index (); 1604 1605 switch (num) { 1606 case -1: 1607 puts ("*** ERROR: No ethernet found.\n"); 1608 return (1); 1609 case 0: 1610 puts ("*** ERROR: `ethaddr' not set\n"); 1611 break; 1612 default: 1613 printf ("*** ERROR: `eth%daddr' not set\n", 1614 num); 1615 break; 1616 } 1617 1618 NetStartAgain (); 1619 return (2); 1620 #else 1621 puts ("*** ERROR: `ethaddr' not set\n"); 1622 return (1); 1623 #endif 1624 } 1625 /* Fall through */ 1626 default: 1627 return (0); 1628 } 1629 return (0); /* OK */ 1630 } 1631 /**********************************************************************/ 1632 1633 int 1634 NetCksumOk(uchar * ptr, int len) 1635 { 1636 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1637 } 1638 1639 1640 unsigned 1641 NetCksum(uchar * ptr, int len) 1642 { 1643 ulong xsum; 1644 ushort *p = (ushort *)ptr; 1645 1646 xsum = 0; 1647 while (len-- > 0) 1648 xsum += *p++; 1649 xsum = (xsum & 0xffff) + (xsum >> 16); 1650 xsum = (xsum & 0xffff) + (xsum >> 16); 1651 return (xsum & 0xffff); 1652 } 1653 1654 int 1655 NetEthHdrSize(void) 1656 { 1657 ushort myvlanid; 1658 1659 myvlanid = ntohs(NetOurVLAN); 1660 if (myvlanid == (ushort)-1) 1661 myvlanid = VLAN_NONE; 1662 1663 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1664 } 1665 1666 int 1667 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1668 { 1669 Ethernet_t *et = (Ethernet_t *)xet; 1670 ushort myvlanid; 1671 1672 myvlanid = ntohs(NetOurVLAN); 1673 if (myvlanid == (ushort)-1) 1674 myvlanid = VLAN_NONE; 1675 1676 memcpy (et->et_dest, addr, 6); 1677 memcpy (et->et_src, NetOurEther, 6); 1678 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1679 et->et_protlen = htons(prot); 1680 return ETHER_HDR_SIZE; 1681 } else { 1682 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1683 1684 vet->vet_vlan_type = htons(PROT_VLAN); 1685 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1686 vet->vet_type = htons(prot); 1687 return VLAN_ETHER_HDR_SIZE; 1688 } 1689 } 1690 1691 void 1692 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1693 { 1694 IP_t *ip = (IP_t *)xip; 1695 1696 /* 1697 * If the data is an odd number of bytes, zero the 1698 * byte after the last byte so that the checksum 1699 * will work. 1700 */ 1701 if (len & 1) 1702 xip[IP_HDR_SIZE + len] = 0; 1703 1704 /* 1705 * Construct an IP and UDP header. 1706 * (need to set no fragment bit - XXX) 1707 */ 1708 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1709 ip->ip_tos = 0; 1710 ip->ip_len = htons(IP_HDR_SIZE + len); 1711 ip->ip_id = htons(NetIPID++); 1712 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1713 ip->ip_ttl = 255; 1714 ip->ip_p = 17; /* UDP */ 1715 ip->ip_sum = 0; 1716 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1717 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1718 ip->udp_src = htons(sport); 1719 ip->udp_dst = htons(dport); 1720 ip->udp_len = htons(8 + len); 1721 ip->udp_xsum = 0; 1722 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1723 } 1724 1725 void copy_filename (char *dst, char *src, int size) 1726 { 1727 if (*src && (*src == '"')) { 1728 ++src; 1729 --size; 1730 } 1731 1732 while ((--size > 0) && *src && (*src != '"')) { 1733 *dst++ = *src++; 1734 } 1735 *dst = '\0'; 1736 } 1737 1738 #endif 1739 1740 void ip_to_string (IPaddr_t x, char *s) 1741 { 1742 x = ntohl (x); 1743 sprintf (s, "%d.%d.%d.%d", 1744 (int) ((x >> 24) & 0xff), 1745 (int) ((x >> 16) & 0xff), 1746 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1747 ); 1748 } 1749 1750 IPaddr_t string_to_ip(char *s) 1751 { 1752 IPaddr_t addr; 1753 char *e; 1754 int i; 1755 1756 if (s == NULL) 1757 return(0); 1758 1759 for (addr=0, i=0; i<4; ++i) { 1760 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1761 addr <<= 8; 1762 addr |= (val & 0xFF); 1763 if (s) { 1764 s = (*e) ? e+1 : e; 1765 } 1766 } 1767 1768 return (htonl(addr)); 1769 } 1770 1771 void VLAN_to_string(ushort x, char *s) 1772 { 1773 x = ntohs(x); 1774 1775 if (x == (ushort)-1) 1776 x = VLAN_NONE; 1777 1778 if (x == VLAN_NONE) 1779 strcpy(s, "none"); 1780 else 1781 sprintf(s, "%d", x & VLAN_IDMASK); 1782 } 1783 1784 ushort string_to_VLAN(char *s) 1785 { 1786 ushort id; 1787 1788 if (s == NULL) 1789 return htons(VLAN_NONE); 1790 1791 if (*s < '0' || *s > '9') 1792 id = VLAN_NONE; 1793 else 1794 id = (ushort)simple_strtoul(s, NULL, 10); 1795 1796 return htons(id); 1797 } 1798 1799 IPaddr_t getenv_IPaddr (char *var) 1800 { 1801 return (string_to_ip(getenv(var))); 1802 } 1803 1804 ushort getenv_VLAN(char *var) 1805 { 1806 return (string_to_VLAN(getenv(var))); 1807 } 1808