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 #ifndef CONFIG_ARP_TIMEOUT 98 # define ARP_TIMEOUT 50UL /* Deciseconds before trying ARP again */ 99 #elif (CONFIG_ARP_TIMEOUT < 100) 100 # error "Due to possible overflow CONFIG_ARP_TIMEOUT must be greater than 100ms" 101 #else 102 # if (CONFIG_ARP_TIMEOUT % 100) 103 # warning "Supported ARP_TIMEOUT precision is 100ms" 104 # endif 105 # define ARP_TIMEOUT (CONFIG_ARP_TIMEOUT / 100) 106 #endif 107 108 109 #ifndef CONFIG_NET_RETRY_COUNT 110 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 111 #else 112 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT 113 #endif 114 115 #if 0 116 #define ET_DEBUG 117 #endif 118 119 /** BOOTP EXTENTIONS **/ 120 121 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 122 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 123 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 124 #if defined(CONFIG_BOOTP_DNS2) 125 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 126 #endif 127 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 128 char NetOurHostName[32]={0,}; /* Our hostname */ 129 char NetOurRootPath[64]={0,}; /* Our bootpath */ 130 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 131 132 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 133 IPaddr_t Mcast_addr; 134 #endif 135 136 /** END OF BOOTP EXTENTIONS **/ 137 138 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 139 uchar NetOurEther[6]; /* Our ethernet address */ 140 uchar NetServerEther[6] = /* Boot server enet address */ 141 { 0, 0, 0, 0, 0, 0 }; 142 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 143 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ 144 volatile uchar *NetRxPkt; /* Current receive packet */ 145 int NetRxPktLen; /* Current rx packet length */ 146 unsigned NetIPID; /* IP packet ID */ 147 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 148 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 149 uchar NetEtherNullAddr[6] = 150 { 0, 0, 0, 0, 0, 0 }; 151 #ifdef CONFIG_API 152 void (*push_packet)(volatile void *, int len) = 0; 153 #endif 154 #if defined(CONFIG_CMD_CDP) 155 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 156 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 157 #endif 158 int NetState; /* Network loop state */ 159 #ifdef CONFIG_NET_MULTI 160 int NetRestartWrap = 0; /* Tried all network devices */ 161 static int NetRestarted = 0; /* Network loop restarted */ 162 static int NetDevExists = 0; /* At least one device configured */ 163 #endif 164 165 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 166 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 167 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 168 169 char BootFile[128]; /* Boot File name */ 170 171 #if defined(CONFIG_CMD_PING) 172 IPaddr_t NetPingIP; /* the ip address to ping */ 173 174 static void PingStart(void); 175 #endif 176 177 #if defined(CONFIG_CMD_CDP) 178 static void CDPStart(void); 179 #endif 180 181 #if defined(CONFIG_CMD_SNTP) 182 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 183 int NetTimeOffset=0; /* offset time from UTC */ 184 #endif 185 186 #ifdef CONFIG_NETCONSOLE 187 void NcStart(void); 188 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 189 #endif 190 191 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 192 193 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 194 195 static rxhand_f *packetHandler; /* Current RX packet handler */ 196 static thand_f *timeHandler; /* Current timeout handler */ 197 static ulong timeStart; /* Time base value */ 198 static ulong timeDelta; /* Current timeout value */ 199 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 200 201 static int net_check_prereq (proto_t protocol); 202 203 /**********************************************************************/ 204 205 IPaddr_t NetArpWaitPacketIP; 206 IPaddr_t NetArpWaitReplyIP; 207 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 208 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 209 int NetArpWaitTxPacketSize; 210 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 211 ulong NetArpWaitTimerStart; 212 int NetArpWaitTry; 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 * CFG_HZ / 10) { 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 /**********************************************************************/ 282 /* 283 * Main network processing loop. 284 */ 285 286 int 287 NetLoop(proto_t protocol) 288 { 289 bd_t *bd = gd->bd; 290 291 #ifdef CONFIG_NET_MULTI 292 NetRestarted = 0; 293 NetDevExists = 0; 294 #endif 295 296 /* XXX problem with bss workaround */ 297 NetArpWaitPacketMAC = NULL; 298 NetArpWaitTxPacket = NULL; 299 NetArpWaitPacketIP = 0; 300 NetArpWaitReplyIP = 0; 301 NetArpWaitTxPacket = NULL; 302 NetTxPacket = NULL; 303 304 if (!NetTxPacket) { 305 int i; 306 /* 307 * Setup packet buffers, aligned correctly. 308 */ 309 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 310 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 311 for (i = 0; i < PKTBUFSRX; i++) { 312 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 313 } 314 } 315 316 if (!NetArpWaitTxPacket) { 317 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 318 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 319 NetArpWaitTxPacketSize = 0; 320 } 321 322 eth_halt(); 323 #ifdef CONFIG_NET_MULTI 324 eth_set_current(); 325 #endif 326 if (eth_init(bd) < 0) { 327 eth_halt(); 328 return(-1); 329 } 330 331 restart: 332 #ifdef CONFIG_NET_MULTI 333 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 334 #else 335 memcpy (NetOurEther, bd->bi_enetaddr, 6); 336 #endif 337 338 NetState = NETLOOP_CONTINUE; 339 340 /* 341 * Start the ball rolling with the given start function. From 342 * here on, this code is a state machine driven by received 343 * packets and timer events. 344 */ 345 346 switch (protocol) { 347 #if defined(CONFIG_CMD_NFS) 348 case NFS: 349 #endif 350 #if defined(CONFIG_CMD_PING) 351 case PING: 352 #endif 353 #if defined(CONFIG_CMD_SNTP) 354 case SNTP: 355 #endif 356 case NETCONS: 357 case TFTP: 358 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 359 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 360 NetOurSubnetMask= getenv_IPaddr ("netmask"); 361 NetOurVLAN = getenv_VLAN("vlan"); 362 NetOurNativeVLAN = getenv_VLAN("nvlan"); 363 364 switch (protocol) { 365 #if defined(CONFIG_CMD_NFS) 366 case NFS: 367 #endif 368 case NETCONS: 369 case TFTP: 370 NetServerIP = getenv_IPaddr ("serverip"); 371 break; 372 #if defined(CONFIG_CMD_PING) 373 case PING: 374 /* nothing */ 375 break; 376 #endif 377 #if defined(CONFIG_CMD_SNTP) 378 case SNTP: 379 /* nothing */ 380 break; 381 #endif 382 default: 383 break; 384 } 385 386 break; 387 case BOOTP: 388 case RARP: 389 /* 390 * initialize our IP addr to 0 in order to accept ANY 391 * IP addr assigned to us by the BOOTP / RARP server 392 */ 393 NetOurIP = 0; 394 NetServerIP = getenv_IPaddr ("serverip"); 395 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 396 NetOurNativeVLAN = getenv_VLAN("nvlan"); 397 case CDP: 398 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 399 NetOurNativeVLAN = getenv_VLAN("nvlan"); 400 break; 401 default: 402 break; 403 } 404 405 switch (net_check_prereq (protocol)) { 406 case 1: 407 /* network not configured */ 408 eth_halt(); 409 return (-1); 410 411 #ifdef CONFIG_NET_MULTI 412 case 2: 413 /* network device not configured */ 414 break; 415 #endif /* CONFIG_NET_MULTI */ 416 417 case 0: 418 #ifdef CONFIG_NET_MULTI 419 NetDevExists = 1; 420 #endif 421 switch (protocol) { 422 case TFTP: 423 /* always use ARP to get server ethernet address */ 424 TftpStart(); 425 break; 426 427 #if defined(CONFIG_CMD_DHCP) 428 case DHCP: 429 /* Start with a clean slate... */ 430 BootpTry = 0; 431 NetOurIP = 0; 432 NetServerIP = getenv_IPaddr ("serverip"); 433 DhcpRequest(); /* Basically same as BOOTP */ 434 break; 435 #endif 436 437 case BOOTP: 438 BootpTry = 0; 439 BootpRequest (); 440 break; 441 442 case RARP: 443 RarpTry = 0; 444 RarpRequest (); 445 break; 446 #if defined(CONFIG_CMD_PING) 447 case PING: 448 PingStart(); 449 break; 450 #endif 451 #if defined(CONFIG_CMD_NFS) 452 case NFS: 453 NfsStart(); 454 break; 455 #endif 456 #if defined(CONFIG_CMD_CDP) 457 case CDP: 458 CDPStart(); 459 break; 460 #endif 461 #ifdef CONFIG_NETCONSOLE 462 case NETCONS: 463 NcStart(); 464 break; 465 #endif 466 #if defined(CONFIG_CMD_SNTP) 467 case SNTP: 468 SntpStart(); 469 break; 470 #endif 471 default: 472 break; 473 } 474 475 NetBootFileXferSize = 0; 476 break; 477 } 478 479 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 480 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 481 /* 482 * Echo the inverted link state to the fault LED. 483 */ 484 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) { 485 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 486 } else { 487 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 488 } 489 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 490 #endif /* CONFIG_MII, ... */ 491 492 /* 493 * Main packet reception loop. Loop receiving packets until 494 * someone sets `NetState' to a state that terminates. 495 */ 496 for (;;) { 497 WATCHDOG_RESET(); 498 #ifdef CONFIG_SHOW_ACTIVITY 499 { 500 extern void show_activity(int arg); 501 show_activity(1); 502 } 503 #endif 504 /* 505 * Check the ethernet for a new packet. The ethernet 506 * receive routine will process it. 507 */ 508 eth_rx(); 509 510 /* 511 * Abort if ctrl-c was pressed. 512 */ 513 if (ctrlc()) { 514 eth_halt(); 515 puts ("\nAbort\n"); 516 return (-1); 517 } 518 519 ArpTimeoutCheck(); 520 521 /* 522 * Check for a timeout, and run the timeout handler 523 * if we have one. 524 */ 525 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 526 thand_f *x; 527 528 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 529 # if defined(CFG_FAULT_ECHO_LINK_DOWN) && \ 530 defined(CONFIG_STATUS_LED) && \ 531 defined(STATUS_LED_RED) 532 /* 533 * Echo the inverted link state to the fault LED. 534 */ 535 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) { 536 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 537 } else { 538 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 539 } 540 # endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 541 #endif /* CONFIG_MII, ... */ 542 x = timeHandler; 543 timeHandler = (thand_f *)0; 544 (*x)(); 545 } 546 547 548 switch (NetState) { 549 550 case NETLOOP_RESTART: 551 #ifdef CONFIG_NET_MULTI 552 NetRestarted = 1; 553 #endif 554 goto restart; 555 556 case NETLOOP_SUCCESS: 557 if (NetBootFileXferSize > 0) { 558 char buf[20]; 559 printf("Bytes transferred = %ld (%lx hex)\n", 560 NetBootFileXferSize, 561 NetBootFileXferSize); 562 sprintf(buf, "%lX", NetBootFileXferSize); 563 setenv("filesize", buf); 564 565 sprintf(buf, "%lX", (unsigned long)load_addr); 566 setenv("fileaddr", buf); 567 } 568 eth_halt(); 569 return NetBootFileXferSize; 570 571 case NETLOOP_FAIL: 572 return (-1); 573 } 574 } 575 } 576 577 /**********************************************************************/ 578 579 static void 580 startAgainTimeout(void) 581 { 582 NetState = NETLOOP_RESTART; 583 } 584 585 static void 586 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 587 { 588 /* Totally ignore the packet */ 589 } 590 591 void NetStartAgain (void) 592 { 593 char *nretry; 594 int noretry = 0, once = 0; 595 596 if ((nretry = getenv ("netretry")) != NULL) { 597 noretry = (strcmp (nretry, "no") == 0); 598 once = (strcmp (nretry, "once") == 0); 599 } 600 if (noretry) { 601 eth_halt (); 602 NetState = NETLOOP_FAIL; 603 return; 604 } 605 #ifndef CONFIG_NET_MULTI 606 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout); 607 NetSetHandler (startAgainHandler); 608 #else /* !CONFIG_NET_MULTI*/ 609 eth_halt (); 610 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 611 eth_try_another (!NetRestarted); 612 #endif 613 eth_init (gd->bd); 614 if (NetRestartWrap) { 615 NetRestartWrap = 0; 616 if (NetDevExists && !once) { 617 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout); 618 NetSetHandler (startAgainHandler); 619 } else { 620 NetState = NETLOOP_FAIL; 621 } 622 } else { 623 NetState = NETLOOP_RESTART; 624 } 625 #endif /* CONFIG_NET_MULTI */ 626 } 627 628 /**********************************************************************/ 629 /* 630 * Miscelaneous bits. 631 */ 632 633 void 634 NetSetHandler(rxhand_f * f) 635 { 636 packetHandler = f; 637 } 638 639 640 void 641 NetSetTimeout(ulong iv, thand_f * f) 642 { 643 if (iv == 0) { 644 timeHandler = (thand_f *)0; 645 } else { 646 timeHandler = f; 647 timeStart = get_timer(0); 648 timeDelta = iv; 649 } 650 } 651 652 653 void 654 NetSendPacket(volatile uchar * pkt, int len) 655 { 656 (void) eth_send(pkt, len); 657 } 658 659 int 660 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 661 { 662 uchar *pkt; 663 664 /* convert to new style broadcast */ 665 if (dest == 0) 666 dest = 0xFFFFFFFF; 667 668 /* if broadcast, make the ether address a broadcast and don't do ARP */ 669 if (dest == 0xFFFFFFFF) 670 ether = NetBcastAddr; 671 672 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 673 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 674 675 #ifdef ET_DEBUG 676 printf("sending ARP for %08lx\n", dest); 677 #endif 678 NetArpWaitPacketIP = dest; 679 NetArpWaitPacketMAC = ether; 680 681 pkt = NetArpWaitTxPacket; 682 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 683 684 NetSetIP (pkt, dest, dport, sport, len); 685 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 686 687 /* size of the waiting packet */ 688 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 689 690 /* and do the ARP request */ 691 NetArpWaitTry = 1; 692 NetArpWaitTimerStart = get_timer(0); 693 ArpRequest(); 694 return 1; /* waiting */ 695 } 696 697 #ifdef ET_DEBUG 698 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", 699 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 700 #endif 701 702 pkt = (uchar *)NetTxPacket; 703 pkt += NetSetEther (pkt, ether, PROT_IP); 704 NetSetIP (pkt, dest, dport, sport, len); 705 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 706 707 return 0; /* transmitted */ 708 } 709 710 #if defined(CONFIG_CMD_PING) 711 static ushort PingSeqNo; 712 713 int PingSend(void) 714 { 715 static uchar mac[6]; 716 volatile IP_t *ip; 717 volatile ushort *s; 718 uchar *pkt; 719 720 /* XXX always send arp request */ 721 722 memcpy(mac, NetEtherNullAddr, 6); 723 724 #ifdef ET_DEBUG 725 printf("sending ARP for %08lx\n", NetPingIP); 726 #endif 727 728 NetArpWaitPacketIP = NetPingIP; 729 NetArpWaitPacketMAC = mac; 730 731 pkt = NetArpWaitTxPacket; 732 pkt += NetSetEther(pkt, mac, PROT_IP); 733 734 ip = (volatile IP_t *)pkt; 735 736 /* 737 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 738 */ 739 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 740 ip->ip_tos = 0; 741 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 742 ip->ip_id = htons(NetIPID++); 743 ip->ip_off = htons(0x4000); /* No fragmentation */ 744 ip->ip_ttl = 255; 745 ip->ip_p = 0x01; /* ICMP */ 746 ip->ip_sum = 0; 747 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 748 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 749 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 750 751 s = &ip->udp_src; /* XXX ICMP starts here */ 752 s[0] = htons(0x0800); /* echo-request, code */ 753 s[1] = 0; /* checksum */ 754 s[2] = 0; /* identifier */ 755 s[3] = htons(PingSeqNo++); /* sequence number */ 756 s[1] = ~NetCksum((uchar *)s, 8/2); 757 758 /* size of the waiting packet */ 759 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 760 761 /* and do the ARP request */ 762 NetArpWaitTry = 1; 763 NetArpWaitTimerStart = get_timer(0); 764 ArpRequest(); 765 return 1; /* waiting */ 766 } 767 768 static void 769 PingTimeout (void) 770 { 771 eth_halt(); 772 NetState = NETLOOP_FAIL; /* we did not get the reply */ 773 } 774 775 static void 776 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 777 { 778 IPaddr_t tmp; 779 volatile IP_t *ip = (volatile IP_t *)pkt; 780 781 tmp = NetReadIP((void *)&ip->ip_src); 782 if (tmp != NetPingIP) 783 return; 784 785 NetState = NETLOOP_SUCCESS; 786 } 787 788 static void PingStart(void) 789 { 790 #if defined(CONFIG_NET_MULTI) 791 printf ("Using %s device\n", eth_get_name()); 792 #endif /* CONFIG_NET_MULTI */ 793 NetSetTimeout (10UL * CFG_HZ, PingTimeout); 794 NetSetHandler (PingHandler); 795 796 PingSend(); 797 } 798 #endif 799 800 #if defined(CONFIG_CMD_CDP) 801 802 #define CDP_DEVICE_ID_TLV 0x0001 803 #define CDP_ADDRESS_TLV 0x0002 804 #define CDP_PORT_ID_TLV 0x0003 805 #define CDP_CAPABILITIES_TLV 0x0004 806 #define CDP_VERSION_TLV 0x0005 807 #define CDP_PLATFORM_TLV 0x0006 808 #define CDP_NATIVE_VLAN_TLV 0x000a 809 #define CDP_APPLIANCE_VLAN_TLV 0x000e 810 #define CDP_TRIGGER_TLV 0x000f 811 #define CDP_POWER_CONSUMPTION_TLV 0x0010 812 #define CDP_SYSNAME_TLV 0x0014 813 #define CDP_SYSOBJECT_TLV 0x0015 814 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 815 816 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */ 817 818 static int CDPSeq; 819 static int CDPOK; 820 821 ushort CDPNativeVLAN; 822 ushort CDPApplianceVLAN; 823 824 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 825 826 static ushort CDP_compute_csum(const uchar *buff, ushort len) 827 { 828 ushort csum; 829 int odd; 830 ulong result = 0; 831 ushort leftover; 832 ushort *p; 833 834 if (len > 0) { 835 odd = 1 & (ulong)buff; 836 if (odd) { 837 result = *buff << 8; 838 len--; 839 buff++; 840 } 841 while (len > 1) { 842 p = (ushort *)buff; 843 result += *p++; 844 buff = (uchar *)p; 845 if (result & 0x80000000) 846 result = (result & 0xFFFF) + (result >> 16); 847 len -= 2; 848 } 849 if (len) { 850 leftover = (signed short)(*(const signed char *)buff); 851 /* CISCO SUCKS big time! (and blows too): 852 * CDP uses the IP checksum algorithm with a twist; 853 * for the last byte it *sign* extends and sums. 854 */ 855 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 856 } 857 while (result >> 16) 858 result = (result & 0xFFFF) + (result >> 16); 859 860 if (odd) 861 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 862 } 863 864 /* add up 16-bit and 17-bit words for 17+c bits */ 865 result = (result & 0xffff) + (result >> 16); 866 /* add up 16-bit and 2-bit for 16+c bit */ 867 result = (result & 0xffff) + (result >> 16); 868 /* add up carry.. */ 869 result = (result & 0xffff) + (result >> 16); 870 871 /* negate */ 872 csum = ~(ushort)result; 873 874 /* run time endian detection */ 875 if (csum != htons(csum)) /* little endian */ 876 csum = htons(csum); 877 878 return csum; 879 } 880 881 int CDPSendTrigger(void) 882 { 883 volatile uchar *pkt; 884 volatile ushort *s; 885 volatile ushort *cp; 886 Ethernet_t *et; 887 int len; 888 ushort chksum; 889 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 890 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 891 char buf[32]; 892 #endif 893 894 pkt = NetTxPacket; 895 et = (Ethernet_t *)pkt; 896 897 /* NOTE: trigger sent not on any VLAN */ 898 899 /* form ethernet header */ 900 memcpy(et->et_dest, NetCDPAddr, 6); 901 memcpy(et->et_src, NetOurEther, 6); 902 903 pkt += ETHER_HDR_SIZE; 904 905 /* SNAP header */ 906 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 907 pkt += sizeof(CDP_SNAP_hdr); 908 909 /* CDP header */ 910 *pkt++ = 0x02; /* CDP version 2 */ 911 *pkt++ = 180; /* TTL */ 912 s = (volatile ushort *)pkt; 913 cp = s; 914 *s++ = htons(0); /* checksum (0 for later calculation) */ 915 916 /* CDP fields */ 917 #ifdef CONFIG_CDP_DEVICE_ID 918 *s++ = htons(CDP_DEVICE_ID_TLV); 919 *s++ = htons(CONFIG_CDP_DEVICE_ID); 920 memset(buf, 0, sizeof(buf)); 921 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 922 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 923 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 924 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 925 memcpy((uchar *)s, buf, 16); 926 s += 16 / 2; 927 #endif 928 929 #ifdef CONFIG_CDP_PORT_ID 930 *s++ = htons(CDP_PORT_ID_TLV); 931 memset(buf, 0, sizeof(buf)); 932 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 933 len = strlen(buf); 934 if (len & 1) /* make it even */ 935 len++; 936 *s++ = htons(len + 4); 937 memcpy((uchar *)s, buf, len); 938 s += len / 2; 939 #endif 940 941 #ifdef CONFIG_CDP_CAPABILITIES 942 *s++ = htons(CDP_CAPABILITIES_TLV); 943 *s++ = htons(8); 944 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 945 s += 2; 946 #endif 947 948 #ifdef CONFIG_CDP_VERSION 949 *s++ = htons(CDP_VERSION_TLV); 950 memset(buf, 0, sizeof(buf)); 951 strcpy(buf, CONFIG_CDP_VERSION); 952 len = strlen(buf); 953 if (len & 1) /* make it even */ 954 len++; 955 *s++ = htons(len + 4); 956 memcpy((uchar *)s, buf, len); 957 s += len / 2; 958 #endif 959 960 #ifdef CONFIG_CDP_PLATFORM 961 *s++ = htons(CDP_PLATFORM_TLV); 962 memset(buf, 0, sizeof(buf)); 963 strcpy(buf, CONFIG_CDP_PLATFORM); 964 len = strlen(buf); 965 if (len & 1) /* make it even */ 966 len++; 967 *s++ = htons(len + 4); 968 memcpy((uchar *)s, buf, len); 969 s += len / 2; 970 #endif 971 972 #ifdef CONFIG_CDP_TRIGGER 973 *s++ = htons(CDP_TRIGGER_TLV); 974 *s++ = htons(8); 975 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 976 s += 2; 977 #endif 978 979 #ifdef CONFIG_CDP_POWER_CONSUMPTION 980 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 981 *s++ = htons(6); 982 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 983 #endif 984 985 /* length of ethernet packet */ 986 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 987 et->et_protlen = htons(len); 988 989 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 990 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 991 if (chksum == 0) 992 chksum = 0xFFFF; 993 *cp = htons(chksum); 994 995 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 996 return 0; 997 } 998 999 static void 1000 CDPTimeout (void) 1001 { 1002 CDPSeq++; 1003 1004 if (CDPSeq < 3) { 1005 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1006 CDPSendTrigger(); 1007 return; 1008 } 1009 1010 /* if not OK try again */ 1011 if (!CDPOK) 1012 NetStartAgain(); 1013 else 1014 NetState = NETLOOP_SUCCESS; 1015 } 1016 1017 static void 1018 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 1019 { 1020 /* nothing */ 1021 } 1022 1023 static void 1024 CDPHandler(const uchar * pkt, unsigned len) 1025 { 1026 const uchar *t; 1027 const ushort *ss; 1028 ushort type, tlen; 1029 uchar applid; 1030 ushort vlan, nvlan; 1031 1032 /* minimum size? */ 1033 if (len < sizeof(CDP_SNAP_hdr) + 4) 1034 goto pkt_short; 1035 1036 /* check for valid CDP SNAP header */ 1037 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1038 return; 1039 1040 pkt += sizeof(CDP_SNAP_hdr); 1041 len -= sizeof(CDP_SNAP_hdr); 1042 1043 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1044 if (pkt[0] < 0x02 || pkt[1] == 0) 1045 return; 1046 1047 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1048 if (pkt[0] != 0x02) 1049 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1050 pkt[0] & 0xff); 1051 1052 if (CDP_compute_csum(pkt, len) != 0) 1053 return; 1054 1055 pkt += 4; 1056 len -= 4; 1057 1058 vlan = htons(-1); 1059 nvlan = htons(-1); 1060 while (len > 0) { 1061 if (len < 4) 1062 goto pkt_short; 1063 1064 ss = (const ushort *)pkt; 1065 type = ntohs(ss[0]); 1066 tlen = ntohs(ss[1]); 1067 if (tlen > len) { 1068 goto pkt_short; 1069 } 1070 1071 pkt += tlen; 1072 len -= tlen; 1073 1074 ss += 2; /* point ss to the data of the TLV */ 1075 tlen -= 4; 1076 1077 switch (type) { 1078 case CDP_DEVICE_ID_TLV: 1079 break; 1080 case CDP_ADDRESS_TLV: 1081 break; 1082 case CDP_PORT_ID_TLV: 1083 break; 1084 case CDP_CAPABILITIES_TLV: 1085 break; 1086 case CDP_VERSION_TLV: 1087 break; 1088 case CDP_PLATFORM_TLV: 1089 break; 1090 case CDP_NATIVE_VLAN_TLV: 1091 nvlan = *ss; 1092 break; 1093 case CDP_APPLIANCE_VLAN_TLV: 1094 t = (const uchar *)ss; 1095 while (tlen > 0) { 1096 if (tlen < 3) 1097 goto pkt_short; 1098 1099 applid = t[0]; 1100 ss = (const ushort *)(t + 1); 1101 1102 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1103 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1104 vlan = *ss; 1105 #else 1106 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1107 #endif 1108 t += 3; tlen -= 3; 1109 } 1110 break; 1111 case CDP_TRIGGER_TLV: 1112 break; 1113 case CDP_POWER_CONSUMPTION_TLV: 1114 break; 1115 case CDP_SYSNAME_TLV: 1116 break; 1117 case CDP_SYSOBJECT_TLV: 1118 break; 1119 case CDP_MANAGEMENT_ADDRESS_TLV: 1120 break; 1121 } 1122 } 1123 1124 CDPApplianceVLAN = vlan; 1125 CDPNativeVLAN = nvlan; 1126 1127 CDPOK = 1; 1128 return; 1129 1130 pkt_short: 1131 printf("** CDP packet is too short\n"); 1132 return; 1133 } 1134 1135 static void CDPStart(void) 1136 { 1137 #if defined(CONFIG_NET_MULTI) 1138 printf ("Using %s device\n", eth_get_name()); 1139 #endif 1140 CDPSeq = 0; 1141 CDPOK = 0; 1142 1143 CDPNativeVLAN = htons(-1); 1144 CDPApplianceVLAN = htons(-1); 1145 1146 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1147 NetSetHandler (CDPDummyHandler); 1148 1149 CDPSendTrigger(); 1150 } 1151 #endif 1152 1153 1154 void 1155 NetReceive(volatile uchar * inpkt, int len) 1156 { 1157 Ethernet_t *et; 1158 IP_t *ip; 1159 ARP_t *arp; 1160 IPaddr_t tmp; 1161 int x; 1162 uchar *pkt; 1163 #if defined(CONFIG_CMD_CDP) 1164 int iscdp; 1165 #endif 1166 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1167 1168 #ifdef ET_DEBUG 1169 printf("packet received\n"); 1170 #endif 1171 1172 NetRxPkt = inpkt; 1173 NetRxPktLen = len; 1174 et = (Ethernet_t *)inpkt; 1175 1176 /* too small packet? */ 1177 if (len < ETHER_HDR_SIZE) 1178 return; 1179 1180 #ifdef CONFIG_API 1181 if (push_packet) { 1182 (*push_packet)(inpkt, len); 1183 return; 1184 } 1185 #endif 1186 1187 #if defined(CONFIG_CMD_CDP) 1188 /* keep track if packet is CDP */ 1189 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1190 #endif 1191 1192 myvlanid = ntohs(NetOurVLAN); 1193 if (myvlanid == (ushort)-1) 1194 myvlanid = VLAN_NONE; 1195 mynvlanid = ntohs(NetOurNativeVLAN); 1196 if (mynvlanid == (ushort)-1) 1197 mynvlanid = VLAN_NONE; 1198 1199 x = ntohs(et->et_protlen); 1200 1201 #ifdef ET_DEBUG 1202 printf("packet received\n"); 1203 #endif 1204 1205 if (x < 1514) { 1206 /* 1207 * Got a 802 packet. Check the other protocol field. 1208 */ 1209 x = ntohs(et->et_prot); 1210 1211 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1212 len -= E802_HDR_SIZE; 1213 1214 } else if (x != PROT_VLAN) { /* normal packet */ 1215 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1216 len -= ETHER_HDR_SIZE; 1217 1218 } else { /* VLAN packet */ 1219 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1220 1221 #ifdef ET_DEBUG 1222 printf("VLAN packet received\n"); 1223 #endif 1224 /* too small packet? */ 1225 if (len < VLAN_ETHER_HDR_SIZE) 1226 return; 1227 1228 /* if no VLAN active */ 1229 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1230 #if defined(CONFIG_CMD_CDP) 1231 && iscdp == 0 1232 #endif 1233 ) 1234 return; 1235 1236 cti = ntohs(vet->vet_tag); 1237 vlanid = cti & VLAN_IDMASK; 1238 x = ntohs(vet->vet_type); 1239 1240 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1241 len -= VLAN_ETHER_HDR_SIZE; 1242 } 1243 1244 #ifdef ET_DEBUG 1245 printf("Receive from protocol 0x%x\n", x); 1246 #endif 1247 1248 #if defined(CONFIG_CMD_CDP) 1249 if (iscdp) { 1250 CDPHandler((uchar *)ip, len); 1251 return; 1252 } 1253 #endif 1254 1255 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1256 if (vlanid == VLAN_NONE) 1257 vlanid = (mynvlanid & VLAN_IDMASK); 1258 /* not matched? */ 1259 if (vlanid != (myvlanid & VLAN_IDMASK)) 1260 return; 1261 } 1262 1263 switch (x) { 1264 1265 case PROT_ARP: 1266 /* 1267 * We have to deal with two types of ARP packets: 1268 * - REQUEST packets will be answered by sending our 1269 * IP address - if we know it. 1270 * - REPLY packates are expected only after we asked 1271 * for the TFTP server's or the gateway's ethernet 1272 * address; so if we receive such a packet, we set 1273 * the server ethernet address 1274 */ 1275 #ifdef ET_DEBUG 1276 puts ("Got ARP\n"); 1277 #endif 1278 arp = (ARP_t *)ip; 1279 if (len < ARP_HDR_SIZE) { 1280 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1281 return; 1282 } 1283 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1284 return; 1285 } 1286 if (ntohs(arp->ar_pro) != PROT_IP) { 1287 return; 1288 } 1289 if (arp->ar_hln != 6) { 1290 return; 1291 } 1292 if (arp->ar_pln != 4) { 1293 return; 1294 } 1295 1296 if (NetOurIP == 0) { 1297 return; 1298 } 1299 1300 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1301 return; 1302 } 1303 1304 switch (ntohs(arp->ar_op)) { 1305 case ARPOP_REQUEST: /* reply with our IP address */ 1306 #ifdef ET_DEBUG 1307 puts ("Got ARP REQUEST, return our IP\n"); 1308 #endif 1309 pkt = (uchar *)et; 1310 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1311 arp->ar_op = htons(ARPOP_REPLY); 1312 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1313 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1314 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1315 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1316 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1317 return; 1318 1319 case ARPOP_REPLY: /* arp reply */ 1320 /* are we waiting for a reply */ 1321 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1322 break; 1323 #ifdef ET_DEBUG 1324 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1325 arp->ar_data[0], arp->ar_data[1], 1326 arp->ar_data[2], arp->ar_data[3], 1327 arp->ar_data[4], arp->ar_data[5]); 1328 #endif 1329 1330 tmp = NetReadIP(&arp->ar_data[6]); 1331 1332 /* matched waiting packet's address */ 1333 if (tmp == NetArpWaitReplyIP) { 1334 #ifdef ET_DEBUG 1335 puts ("Got it\n"); 1336 #endif 1337 /* save address for later use */ 1338 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1339 1340 #ifdef CONFIG_NETCONSOLE 1341 (*packetHandler)(0,0,0,0); 1342 #endif 1343 /* modify header, and transmit it */ 1344 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1345 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1346 1347 /* no arp request pending now */ 1348 NetArpWaitPacketIP = 0; 1349 NetArpWaitTxPacketSize = 0; 1350 NetArpWaitPacketMAC = NULL; 1351 1352 } 1353 return; 1354 default: 1355 #ifdef ET_DEBUG 1356 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1357 #endif 1358 return; 1359 } 1360 break; 1361 1362 case PROT_RARP: 1363 #ifdef ET_DEBUG 1364 puts ("Got RARP\n"); 1365 #endif 1366 arp = (ARP_t *)ip; 1367 if (len < ARP_HDR_SIZE) { 1368 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1369 return; 1370 } 1371 1372 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1373 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1374 (ntohs(arp->ar_pro) != PROT_IP) || 1375 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1376 1377 puts ("invalid RARP header\n"); 1378 } else { 1379 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1380 if (NetServerIP == 0) 1381 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1382 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1383 1384 (*packetHandler)(0,0,0,0); 1385 } 1386 break; 1387 1388 case PROT_IP: 1389 #ifdef ET_DEBUG 1390 puts ("Got IP\n"); 1391 #endif 1392 if (len < IP_HDR_SIZE) { 1393 debug ("len bad %d < %d\n", len, IP_HDR_SIZE); 1394 return; 1395 } 1396 if (len < ntohs(ip->ip_len)) { 1397 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1398 return; 1399 } 1400 len = ntohs(ip->ip_len); 1401 #ifdef ET_DEBUG 1402 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1403 #endif 1404 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1405 return; 1406 } 1407 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ 1408 return; 1409 } 1410 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1411 puts ("checksum bad\n"); 1412 return; 1413 } 1414 tmp = NetReadIP(&ip->ip_dst); 1415 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1416 #ifdef CONFIG_MCAST_TFTP 1417 if (Mcast_addr != tmp) 1418 #endif 1419 return; 1420 } 1421 /* 1422 * watch for ICMP host redirects 1423 * 1424 * There is no real handler code (yet). We just watch 1425 * for ICMP host redirect messages. In case anybody 1426 * sees these messages: please contact me 1427 * (wd@denx.de), or - even better - send me the 1428 * necessary fixes :-) 1429 * 1430 * Note: in all cases where I have seen this so far 1431 * it was a problem with the router configuration, 1432 * for instance when a router was configured in the 1433 * BOOTP reply, but the TFTP server was on the same 1434 * subnet. So this is probably a warning that your 1435 * configuration might be wrong. But I'm not really 1436 * sure if there aren't any other situations. 1437 */ 1438 if (ip->ip_p == IPPROTO_ICMP) { 1439 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1440 1441 switch (icmph->type) { 1442 case ICMP_REDIRECT: 1443 if (icmph->code != ICMP_REDIR_HOST) 1444 return; 1445 puts (" ICMP Host Redirect to "); 1446 print_IPaddr(icmph->un.gateway); 1447 putc(' '); 1448 return; 1449 #if defined(CONFIG_CMD_PING) 1450 case ICMP_ECHO_REPLY: 1451 /* 1452 * IP header OK. Pass the packet to the current handler. 1453 */ 1454 /* XXX point to ip packet */ 1455 (*packetHandler)((uchar *)ip, 0, 0, 0); 1456 return; 1457 case ICMP_ECHO_REQUEST: 1458 #ifdef ET_DEBUG 1459 printf ("Got ICMP ECHO REQUEST, return %d bytes \n", 1460 ETHER_HDR_SIZE + len); 1461 #endif 1462 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1463 memcpy (&et->et_src[ 0], NetOurEther, 6); 1464 1465 ip->ip_sum = 0; 1466 ip->ip_off = 0; 1467 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1468 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1469 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1470 1471 icmph->type = ICMP_ECHO_REPLY; 1472 icmph->checksum = 0; 1473 icmph->checksum = ~NetCksum((uchar *)icmph, 1474 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1475 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1476 return; 1477 #endif 1478 default: 1479 return; 1480 } 1481 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1482 return; 1483 } 1484 1485 #ifdef CONFIG_UDP_CHECKSUM 1486 if (ip->udp_xsum != 0) { 1487 ulong xsum; 1488 ushort *sumptr; 1489 ushort sumlen; 1490 1491 xsum = ip->ip_p; 1492 xsum += (ntohs(ip->udp_len)); 1493 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1494 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1495 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1496 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1497 1498 sumlen = ntohs(ip->udp_len); 1499 sumptr = (ushort *) &(ip->udp_src); 1500 1501 while (sumlen > 1) { 1502 ushort sumdata; 1503 1504 sumdata = *sumptr++; 1505 xsum += ntohs(sumdata); 1506 sumlen -= 2; 1507 } 1508 if (sumlen > 0) { 1509 ushort sumdata; 1510 1511 sumdata = *(unsigned char *) sumptr; 1512 sumdata = (sumdata << 8) & 0xff00; 1513 xsum += sumdata; 1514 } 1515 while ((xsum >> 16) != 0) { 1516 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1517 } 1518 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1519 printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum)); 1520 return; 1521 } 1522 } 1523 #endif 1524 1525 1526 #ifdef CONFIG_NETCONSOLE 1527 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1528 ntohs(ip->udp_dst), 1529 ntohs(ip->udp_src), 1530 ntohs(ip->udp_len) - 8); 1531 #endif 1532 /* 1533 * IP header OK. Pass the packet to the current handler. 1534 */ 1535 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1536 ntohs(ip->udp_dst), 1537 ntohs(ip->udp_src), 1538 ntohs(ip->udp_len) - 8); 1539 break; 1540 } 1541 } 1542 1543 1544 /**********************************************************************/ 1545 1546 static int net_check_prereq (proto_t protocol) 1547 { 1548 switch (protocol) { 1549 /* Fall through */ 1550 #if defined(CONFIG_CMD_PING) 1551 case PING: 1552 if (NetPingIP == 0) { 1553 puts ("*** ERROR: ping address not given\n"); 1554 return (1); 1555 } 1556 goto common; 1557 #endif 1558 #if defined(CONFIG_CMD_SNTP) 1559 case SNTP: 1560 if (NetNtpServerIP == 0) { 1561 puts ("*** ERROR: NTP server address not given\n"); 1562 return (1); 1563 } 1564 goto common; 1565 #endif 1566 #if defined(CONFIG_CMD_NFS) 1567 case NFS: 1568 #endif 1569 case NETCONS: 1570 case TFTP: 1571 if (NetServerIP == 0) { 1572 puts ("*** ERROR: `serverip' not set\n"); 1573 return (1); 1574 } 1575 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) 1576 common: 1577 #endif 1578 1579 if (NetOurIP == 0) { 1580 puts ("*** ERROR: `ipaddr' not set\n"); 1581 return (1); 1582 } 1583 /* Fall through */ 1584 1585 case DHCP: 1586 case RARP: 1587 case BOOTP: 1588 case CDP: 1589 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1590 #ifdef CONFIG_NET_MULTI 1591 extern int eth_get_dev_index (void); 1592 int num = eth_get_dev_index (); 1593 1594 switch (num) { 1595 case -1: 1596 puts ("*** ERROR: No ethernet found.\n"); 1597 return (1); 1598 case 0: 1599 puts ("*** ERROR: `ethaddr' not set\n"); 1600 break; 1601 default: 1602 printf ("*** ERROR: `eth%daddr' not set\n", 1603 num); 1604 break; 1605 } 1606 1607 NetStartAgain (); 1608 return (2); 1609 #else 1610 puts ("*** ERROR: `ethaddr' not set\n"); 1611 return (1); 1612 #endif 1613 } 1614 /* Fall through */ 1615 default: 1616 return (0); 1617 } 1618 return (0); /* OK */ 1619 } 1620 /**********************************************************************/ 1621 1622 int 1623 NetCksumOk(uchar * ptr, int len) 1624 { 1625 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1626 } 1627 1628 1629 unsigned 1630 NetCksum(uchar * ptr, int len) 1631 { 1632 ulong xsum; 1633 ushort *p = (ushort *)ptr; 1634 1635 xsum = 0; 1636 while (len-- > 0) 1637 xsum += *p++; 1638 xsum = (xsum & 0xffff) + (xsum >> 16); 1639 xsum = (xsum & 0xffff) + (xsum >> 16); 1640 return (xsum & 0xffff); 1641 } 1642 1643 int 1644 NetEthHdrSize(void) 1645 { 1646 ushort myvlanid; 1647 1648 myvlanid = ntohs(NetOurVLAN); 1649 if (myvlanid == (ushort)-1) 1650 myvlanid = VLAN_NONE; 1651 1652 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1653 } 1654 1655 int 1656 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1657 { 1658 Ethernet_t *et = (Ethernet_t *)xet; 1659 ushort myvlanid; 1660 1661 myvlanid = ntohs(NetOurVLAN); 1662 if (myvlanid == (ushort)-1) 1663 myvlanid = VLAN_NONE; 1664 1665 memcpy (et->et_dest, addr, 6); 1666 memcpy (et->et_src, NetOurEther, 6); 1667 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1668 et->et_protlen = htons(prot); 1669 return ETHER_HDR_SIZE; 1670 } else { 1671 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1672 1673 vet->vet_vlan_type = htons(PROT_VLAN); 1674 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1675 vet->vet_type = htons(prot); 1676 return VLAN_ETHER_HDR_SIZE; 1677 } 1678 } 1679 1680 void 1681 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1682 { 1683 volatile IP_t *ip = (IP_t *)xip; 1684 1685 /* 1686 * If the data is an odd number of bytes, zero the 1687 * byte after the last byte so that the checksum 1688 * will work. 1689 */ 1690 if (len & 1) 1691 xip[IP_HDR_SIZE + len] = 0; 1692 1693 /* 1694 * Construct an IP and UDP header. 1695 * (need to set no fragment bit - XXX) 1696 */ 1697 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1698 ip->ip_tos = 0; 1699 ip->ip_len = htons(IP_HDR_SIZE + len); 1700 ip->ip_id = htons(NetIPID++); 1701 ip->ip_off = htons(0x4000); /* No fragmentation */ 1702 ip->ip_ttl = 255; 1703 ip->ip_p = 17; /* UDP */ 1704 ip->ip_sum = 0; 1705 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1706 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1707 ip->udp_src = htons(sport); 1708 ip->udp_dst = htons(dport); 1709 ip->udp_len = htons(8 + len); 1710 ip->udp_xsum = 0; 1711 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1712 } 1713 1714 void copy_filename (char *dst, char *src, int size) 1715 { 1716 if (*src && (*src == '"')) { 1717 ++src; 1718 --size; 1719 } 1720 1721 while ((--size > 0) && *src && (*src != '"')) { 1722 *dst++ = *src++; 1723 } 1724 *dst = '\0'; 1725 } 1726 1727 #endif 1728 1729 void ip_to_string (IPaddr_t x, char *s) 1730 { 1731 x = ntohl (x); 1732 sprintf (s, "%d.%d.%d.%d", 1733 (int) ((x >> 24) & 0xff), 1734 (int) ((x >> 16) & 0xff), 1735 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1736 ); 1737 } 1738 1739 IPaddr_t string_to_ip(char *s) 1740 { 1741 IPaddr_t addr; 1742 char *e; 1743 int i; 1744 1745 if (s == NULL) 1746 return(0); 1747 1748 for (addr=0, i=0; i<4; ++i) { 1749 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1750 addr <<= 8; 1751 addr |= (val & 0xFF); 1752 if (s) { 1753 s = (*e) ? e+1 : e; 1754 } 1755 } 1756 1757 return (htonl(addr)); 1758 } 1759 1760 void VLAN_to_string(ushort x, char *s) 1761 { 1762 x = ntohs(x); 1763 1764 if (x == (ushort)-1) 1765 x = VLAN_NONE; 1766 1767 if (x == VLAN_NONE) 1768 strcpy(s, "none"); 1769 else 1770 sprintf(s, "%d", x & VLAN_IDMASK); 1771 } 1772 1773 ushort string_to_VLAN(char *s) 1774 { 1775 ushort id; 1776 1777 if (s == NULL) 1778 return htons(VLAN_NONE); 1779 1780 if (*s < '0' || *s > '9') 1781 id = VLAN_NONE; 1782 else 1783 id = (ushort)simple_strtoul(s, NULL, 10); 1784 1785 return htons(id); 1786 } 1787 1788 void print_IPaddr (IPaddr_t x) 1789 { 1790 char tmp[16]; 1791 1792 ip_to_string (x, tmp); 1793 1794 puts (tmp); 1795 } 1796 1797 IPaddr_t getenv_IPaddr (char *var) 1798 { 1799 return (string_to_ip(getenv(var))); 1800 } 1801 1802 ushort getenv_VLAN(char *var) 1803 { 1804 return (string_to_VLAN(getenv(var))); 1805 } 1806