1 /* 2 * Copied from Linux Monitor (LiMon) - Networking. 3 * 4 * Copyright 1994 - 2000 Neil Russell. 5 * (See License) 6 * Copyright 2000 Roland Borde 7 * Copyright 2000 Paolo Scaffardi 8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de 9 */ 10 11 /* 12 * General Desription: 13 * 14 * The user interface supports commands for BOOTP, RARP, and TFTP. 15 * Also, we support ARP internally. Depending on available data, 16 * these interact as follows: 17 * 18 * BOOTP: 19 * 20 * Prerequisites: - own ethernet address 21 * We want: - own IP address 22 * - TFTP server IP address 23 * - name of bootfile 24 * Next step: ARP 25 * 26 * RARP: 27 * 28 * Prerequisites: - own ethernet address 29 * We want: - own IP address 30 * - TFTP server IP address 31 * Next step: ARP 32 * 33 * ARP: 34 * 35 * Prerequisites: - own ethernet address 36 * - own IP address 37 * - TFTP server IP address 38 * We want: - TFTP server ethernet address 39 * Next step: TFTP 40 * 41 * DHCP: 42 * 43 * Prerequisites: - own ethernet address 44 * We want: - IP, Netmask, ServerIP, Gateway IP 45 * - bootfilename, lease time 46 * Next step: - TFTP 47 * 48 * TFTP: 49 * 50 * Prerequisites: - own ethernet address 51 * - own IP address 52 * - TFTP server IP address 53 * - TFTP server ethernet address 54 * - name of bootfile (if unknown, we use a default name 55 * derived from our own IP address) 56 * We want: - load the boot file 57 * Next step: none 58 * 59 * NFS: 60 * 61 * Prerequisites: - own ethernet address 62 * - own IP address 63 * - name of bootfile (if unknown, we use a default name 64 * derived from our own IP address) 65 * We want: - load the boot file 66 * Next step: none 67 * 68 * SNTP: 69 * 70 * Prerequisites: - own ethernet address 71 * - own IP address 72 * We want: - network time 73 * Next step: none 74 */ 75 76 77 #include <common.h> 78 #include <watchdog.h> 79 #include <command.h> 80 #include <net.h> 81 #include "bootp.h" 82 #include "tftp.h" 83 #include "rarp.h" 84 #include "nfs.h" 85 #ifdef CONFIG_STATUS_LED 86 #include <status_led.h> 87 #include <miiphy.h> 88 #endif 89 #if defined(CONFIG_CMD_SNTP) 90 #include "sntp.h" 91 #endif 92 #if defined(CONFIG_CDP_VERSION) 93 #include <timestamp.h> 94 #endif 95 96 #if defined(CONFIG_CMD_NET) 97 98 DECLARE_GLOBAL_DATA_PTR; 99 100 #ifndef CONFIG_ARP_TIMEOUT 101 # define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */ 102 #else 103 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT 104 #endif 105 106 107 #ifndef CONFIG_NET_RETRY_COUNT 108 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 109 #else 110 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT 111 #endif 112 113 #if 0 114 #define ET_DEBUG 115 #endif 116 117 /** BOOTP EXTENTIONS **/ 118 119 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 120 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 121 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 122 #if defined(CONFIG_BOOTP_DNS2) 123 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 124 #endif 125 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 126 char NetOurHostName[32]={0,}; /* Our hostname */ 127 char NetOurRootPath[64]={0,}; /* Our bootpath */ 128 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 129 130 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 131 IPaddr_t Mcast_addr; 132 #endif 133 134 /** END OF BOOTP EXTENTIONS **/ 135 136 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 137 uchar NetOurEther[6]; /* Our ethernet address */ 138 uchar NetServerEther[6] = /* Boot server enet address */ 139 { 0, 0, 0, 0, 0, 0 }; 140 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 141 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ 142 volatile uchar *NetRxPkt; /* Current receive packet */ 143 int NetRxPktLen; /* Current rx packet length */ 144 unsigned NetIPID; /* IP packet ID */ 145 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 146 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 147 uchar NetEtherNullAddr[6] = 148 { 0, 0, 0, 0, 0, 0 }; 149 #ifdef CONFIG_API 150 void (*push_packet)(volatile void *, int len) = 0; 151 #endif 152 #if defined(CONFIG_CMD_CDP) 153 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 154 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 155 #endif 156 int NetState; /* Network loop state */ 157 #ifdef CONFIG_NET_MULTI 158 int NetRestartWrap = 0; /* Tried all network devices */ 159 static int NetRestarted = 0; /* Network loop restarted */ 160 static int NetDevExists = 0; /* At least one device configured */ 161 #endif 162 163 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 164 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 165 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 166 167 char BootFile[128]; /* Boot File name */ 168 169 #if defined(CONFIG_CMD_PING) 170 IPaddr_t NetPingIP; /* the ip address to ping */ 171 172 static void PingStart(void); 173 #endif 174 175 #if defined(CONFIG_CMD_CDP) 176 static void CDPStart(void); 177 #endif 178 179 #if defined(CONFIG_CMD_SNTP) 180 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 181 int NetTimeOffset=0; /* offset time from UTC */ 182 #endif 183 184 #ifdef CONFIG_NETCONSOLE 185 void NcStart(void); 186 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 187 #endif 188 189 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 190 191 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 192 193 static rxhand_f *packetHandler; /* Current RX packet handler */ 194 static thand_f *timeHandler; /* Current timeout handler */ 195 static ulong timeStart; /* Time base value */ 196 static ulong timeDelta; /* Current timeout value */ 197 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 198 199 static int net_check_prereq (proto_t protocol); 200 201 /**********************************************************************/ 202 203 IPaddr_t NetArpWaitPacketIP; 204 IPaddr_t NetArpWaitReplyIP; 205 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 206 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 207 int NetArpWaitTxPacketSize; 208 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 209 ulong NetArpWaitTimerStart; 210 int NetArpWaitTry; 211 212 void ArpRequest (void) 213 { 214 int i; 215 volatile uchar *pkt; 216 ARP_t *arp; 217 218 #ifdef ET_DEBUG 219 printf ("ARP broadcast %d\n", NetArpWaitTry); 220 #endif 221 pkt = NetTxPacket; 222 223 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 224 225 arp = (ARP_t *) pkt; 226 227 arp->ar_hrd = htons (ARP_ETHER); 228 arp->ar_pro = htons (PROT_IP); 229 arp->ar_hln = 6; 230 arp->ar_pln = 4; 231 arp->ar_op = htons (ARPOP_REQUEST); 232 233 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 234 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 235 for (i = 10; i < 16; ++i) { 236 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 237 } 238 239 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 240 (NetOurIP & NetOurSubnetMask)) { 241 if (NetOurGatewayIP == 0) { 242 puts ("## Warning: gatewayip needed but not set\n"); 243 NetArpWaitReplyIP = NetArpWaitPacketIP; 244 } else { 245 NetArpWaitReplyIP = NetOurGatewayIP; 246 } 247 } else { 248 NetArpWaitReplyIP = NetArpWaitPacketIP; 249 } 250 251 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 252 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 253 } 254 255 void ArpTimeoutCheck(void) 256 { 257 ulong t; 258 259 if (!NetArpWaitPacketIP) 260 return; 261 262 t = get_timer(0); 263 264 /* check for arp timeout */ 265 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) { 266 NetArpWaitTry++; 267 268 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 269 puts ("\nARP Retry count exceeded; starting again\n"); 270 NetArpWaitTry = 0; 271 NetStartAgain(); 272 } else { 273 NetArpWaitTimerStart = t; 274 ArpRequest(); 275 } 276 } 277 } 278 279 /**********************************************************************/ 280 /* 281 * Main network processing loop. 282 */ 283 284 int 285 NetLoop(proto_t protocol) 286 { 287 bd_t *bd = gd->bd; 288 289 #ifdef CONFIG_NET_MULTI 290 NetRestarted = 0; 291 NetDevExists = 0; 292 #endif 293 294 /* XXX problem with bss workaround */ 295 NetArpWaitPacketMAC = NULL; 296 NetArpWaitTxPacket = NULL; 297 NetArpWaitPacketIP = 0; 298 NetArpWaitReplyIP = 0; 299 NetArpWaitTxPacket = NULL; 300 NetTxPacket = NULL; 301 302 if (!NetTxPacket) { 303 int i; 304 /* 305 * Setup packet buffers, aligned correctly. 306 */ 307 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 308 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 309 for (i = 0; i < PKTBUFSRX; i++) { 310 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 311 } 312 } 313 314 if (!NetArpWaitTxPacket) { 315 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 316 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 317 NetArpWaitTxPacketSize = 0; 318 } 319 320 eth_halt(); 321 #ifdef CONFIG_NET_MULTI 322 eth_set_current(); 323 #endif 324 if (eth_init(bd) < 0) { 325 eth_halt(); 326 return(-1); 327 } 328 329 restart: 330 #ifdef CONFIG_NET_MULTI 331 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 332 #else 333 memcpy (NetOurEther, bd->bi_enetaddr, 6); 334 #endif 335 336 NetState = NETLOOP_CONTINUE; 337 338 /* 339 * Start the ball rolling with the given start function. From 340 * here on, this code is a state machine driven by received 341 * packets and timer events. 342 */ 343 344 switch (protocol) { 345 #if defined(CONFIG_CMD_NFS) 346 case NFS: 347 #endif 348 #if defined(CONFIG_CMD_PING) 349 case PING: 350 #endif 351 #if defined(CONFIG_CMD_SNTP) 352 case SNTP: 353 #endif 354 case NETCONS: 355 case TFTP: 356 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 357 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 358 NetOurSubnetMask= getenv_IPaddr ("netmask"); 359 NetOurVLAN = getenv_VLAN("vlan"); 360 NetOurNativeVLAN = getenv_VLAN("nvlan"); 361 362 switch (protocol) { 363 #if defined(CONFIG_CMD_NFS) 364 case NFS: 365 #endif 366 case NETCONS: 367 case TFTP: 368 NetServerIP = getenv_IPaddr ("serverip"); 369 break; 370 #if defined(CONFIG_CMD_PING) 371 case PING: 372 /* nothing */ 373 break; 374 #endif 375 #if defined(CONFIG_CMD_SNTP) 376 case SNTP: 377 /* nothing */ 378 break; 379 #endif 380 default: 381 break; 382 } 383 384 break; 385 case BOOTP: 386 case RARP: 387 /* 388 * initialize our IP addr to 0 in order to accept ANY 389 * IP addr assigned to us by the BOOTP / RARP server 390 */ 391 NetOurIP = 0; 392 NetServerIP = getenv_IPaddr ("serverip"); 393 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 394 NetOurNativeVLAN = getenv_VLAN("nvlan"); 395 case CDP: 396 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 397 NetOurNativeVLAN = getenv_VLAN("nvlan"); 398 break; 399 default: 400 break; 401 } 402 403 switch (net_check_prereq (protocol)) { 404 case 1: 405 /* network not configured */ 406 eth_halt(); 407 return (-1); 408 409 #ifdef CONFIG_NET_MULTI 410 case 2: 411 /* network device not configured */ 412 break; 413 #endif /* CONFIG_NET_MULTI */ 414 415 case 0: 416 #ifdef CONFIG_NET_MULTI 417 NetDevExists = 1; 418 #endif 419 switch (protocol) { 420 case TFTP: 421 /* always use ARP to get server ethernet address */ 422 TftpStart(); 423 break; 424 425 #if defined(CONFIG_CMD_DHCP) 426 case DHCP: 427 /* Start with a clean slate... */ 428 BootpTry = 0; 429 NetOurIP = 0; 430 NetServerIP = getenv_IPaddr ("serverip"); 431 DhcpRequest(); /* Basically same as BOOTP */ 432 break; 433 #endif 434 435 case BOOTP: 436 BootpTry = 0; 437 BootpRequest (); 438 break; 439 440 case RARP: 441 RarpTry = 0; 442 RarpRequest (); 443 break; 444 #if defined(CONFIG_CMD_PING) 445 case PING: 446 PingStart(); 447 break; 448 #endif 449 #if defined(CONFIG_CMD_NFS) 450 case NFS: 451 NfsStart(); 452 break; 453 #endif 454 #if defined(CONFIG_CMD_CDP) 455 case CDP: 456 CDPStart(); 457 break; 458 #endif 459 #ifdef CONFIG_NETCONSOLE 460 case NETCONS: 461 NcStart(); 462 break; 463 #endif 464 #if defined(CONFIG_CMD_SNTP) 465 case SNTP: 466 SntpStart(); 467 break; 468 #endif 469 default: 470 break; 471 } 472 473 NetBootFileXferSize = 0; 474 break; 475 } 476 477 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 478 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 479 /* 480 * Echo the inverted link state to the fault LED. 481 */ 482 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { 483 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 484 } else { 485 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 486 } 487 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 488 #endif /* CONFIG_MII, ... */ 489 490 /* 491 * Main packet reception loop. Loop receiving packets until 492 * someone sets `NetState' to a state that terminates. 493 */ 494 for (;;) { 495 WATCHDOG_RESET(); 496 #ifdef CONFIG_SHOW_ACTIVITY 497 { 498 extern void show_activity(int arg); 499 show_activity(1); 500 } 501 #endif 502 /* 503 * Check the ethernet for a new packet. The ethernet 504 * receive routine will process it. 505 */ 506 eth_rx(); 507 508 /* 509 * Abort if ctrl-c was pressed. 510 */ 511 if (ctrlc()) { 512 eth_halt(); 513 puts ("\nAbort\n"); 514 return (-1); 515 } 516 517 ArpTimeoutCheck(); 518 519 /* 520 * Check for a timeout, and run the timeout handler 521 * if we have one. 522 */ 523 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 524 thand_f *x; 525 526 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 527 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 528 defined(CONFIG_STATUS_LED) && \ 529 defined(STATUS_LED_RED) 530 /* 531 * Echo the inverted link state to the fault LED. 532 */ 533 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { 534 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 535 } else { 536 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 537 } 538 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 539 #endif /* CONFIG_MII, ... */ 540 x = timeHandler; 541 timeHandler = (thand_f *)0; 542 (*x)(); 543 } 544 545 546 switch (NetState) { 547 548 case NETLOOP_RESTART: 549 #ifdef CONFIG_NET_MULTI 550 NetRestarted = 1; 551 #endif 552 goto restart; 553 554 case NETLOOP_SUCCESS: 555 if (NetBootFileXferSize > 0) { 556 char buf[20]; 557 printf("Bytes transferred = %ld (%lx hex)\n", 558 NetBootFileXferSize, 559 NetBootFileXferSize); 560 sprintf(buf, "%lX", NetBootFileXferSize); 561 setenv("filesize", buf); 562 563 sprintf(buf, "%lX", (unsigned long)load_addr); 564 setenv("fileaddr", buf); 565 } 566 eth_halt(); 567 return NetBootFileXferSize; 568 569 case NETLOOP_FAIL: 570 return (-1); 571 } 572 } 573 } 574 575 /**********************************************************************/ 576 577 static void 578 startAgainTimeout(void) 579 { 580 NetState = NETLOOP_RESTART; 581 } 582 583 static void 584 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 585 { 586 /* Totally ignore the packet */ 587 } 588 589 void NetStartAgain (void) 590 { 591 char *nretry; 592 int noretry = 0, once = 0; 593 594 if ((nretry = getenv ("netretry")) != NULL) { 595 noretry = (strcmp (nretry, "no") == 0); 596 once = (strcmp (nretry, "once") == 0); 597 } 598 if (noretry) { 599 eth_halt (); 600 NetState = NETLOOP_FAIL; 601 return; 602 } 603 #ifndef CONFIG_NET_MULTI 604 NetSetTimeout (10000UL, startAgainTimeout); 605 NetSetHandler (startAgainHandler); 606 #else /* !CONFIG_NET_MULTI*/ 607 eth_halt (); 608 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 609 eth_try_another (!NetRestarted); 610 #endif 611 eth_init (gd->bd); 612 if (NetRestartWrap) { 613 NetRestartWrap = 0; 614 if (NetDevExists && !once) { 615 NetSetTimeout (10000UL, startAgainTimeout); 616 NetSetHandler (startAgainHandler); 617 } else { 618 NetState = NETLOOP_FAIL; 619 } 620 } else { 621 NetState = NETLOOP_RESTART; 622 } 623 #endif /* CONFIG_NET_MULTI */ 624 } 625 626 /**********************************************************************/ 627 /* 628 * Miscelaneous bits. 629 */ 630 631 void 632 NetSetHandler(rxhand_f * f) 633 { 634 packetHandler = f; 635 } 636 637 638 void 639 NetSetTimeout(ulong iv, thand_f * f) 640 { 641 if (iv == 0) { 642 timeHandler = (thand_f *)0; 643 } else { 644 timeHandler = f; 645 timeStart = get_timer(0); 646 timeDelta = iv; 647 } 648 } 649 650 651 void 652 NetSendPacket(volatile uchar * pkt, int len) 653 { 654 (void) eth_send(pkt, len); 655 } 656 657 int 658 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 659 { 660 uchar *pkt; 661 662 /* convert to new style broadcast */ 663 if (dest == 0) 664 dest = 0xFFFFFFFF; 665 666 /* if broadcast, make the ether address a broadcast and don't do ARP */ 667 if (dest == 0xFFFFFFFF) 668 ether = NetBcastAddr; 669 670 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 671 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 672 673 #ifdef ET_DEBUG 674 printf("sending ARP for %08lx\n", dest); 675 #endif 676 NetArpWaitPacketIP = dest; 677 NetArpWaitPacketMAC = ether; 678 679 pkt = NetArpWaitTxPacket; 680 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 681 682 NetSetIP (pkt, dest, dport, sport, len); 683 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 684 685 /* size of the waiting packet */ 686 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 687 688 /* and do the ARP request */ 689 NetArpWaitTry = 1; 690 NetArpWaitTimerStart = get_timer(0); 691 ArpRequest(); 692 return 1; /* waiting */ 693 } 694 695 #ifdef ET_DEBUG 696 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", 697 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 698 #endif 699 700 pkt = (uchar *)NetTxPacket; 701 pkt += NetSetEther (pkt, ether, PROT_IP); 702 NetSetIP (pkt, dest, dport, sport, len); 703 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 704 705 return 0; /* transmitted */ 706 } 707 708 #if defined(CONFIG_CMD_PING) 709 static ushort PingSeqNo; 710 711 int PingSend(void) 712 { 713 static uchar mac[6]; 714 volatile IP_t *ip; 715 volatile ushort *s; 716 uchar *pkt; 717 718 /* XXX always send arp request */ 719 720 memcpy(mac, NetEtherNullAddr, 6); 721 722 #ifdef ET_DEBUG 723 printf("sending ARP for %08lx\n", NetPingIP); 724 #endif 725 726 NetArpWaitPacketIP = NetPingIP; 727 NetArpWaitPacketMAC = mac; 728 729 pkt = NetArpWaitTxPacket; 730 pkt += NetSetEther(pkt, mac, PROT_IP); 731 732 ip = (volatile IP_t *)pkt; 733 734 /* 735 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 736 */ 737 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 738 ip->ip_tos = 0; 739 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 740 ip->ip_id = htons(NetIPID++); 741 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 742 ip->ip_ttl = 255; 743 ip->ip_p = 0x01; /* ICMP */ 744 ip->ip_sum = 0; 745 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 746 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 747 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 748 749 s = &ip->udp_src; /* XXX ICMP starts here */ 750 s[0] = htons(0x0800); /* echo-request, code */ 751 s[1] = 0; /* checksum */ 752 s[2] = 0; /* identifier */ 753 s[3] = htons(PingSeqNo++); /* sequence number */ 754 s[1] = ~NetCksum((uchar *)s, 8/2); 755 756 /* size of the waiting packet */ 757 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 758 759 /* and do the ARP request */ 760 NetArpWaitTry = 1; 761 NetArpWaitTimerStart = get_timer(0); 762 ArpRequest(); 763 return 1; /* waiting */ 764 } 765 766 static void 767 PingTimeout (void) 768 { 769 eth_halt(); 770 NetState = NETLOOP_FAIL; /* we did not get the reply */ 771 } 772 773 static void 774 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 775 { 776 IPaddr_t tmp; 777 volatile IP_t *ip = (volatile IP_t *)pkt; 778 779 tmp = NetReadIP((void *)&ip->ip_src); 780 if (tmp != NetPingIP) 781 return; 782 783 NetState = NETLOOP_SUCCESS; 784 } 785 786 static void PingStart(void) 787 { 788 #if defined(CONFIG_NET_MULTI) 789 printf ("Using %s device\n", eth_get_name()); 790 #endif /* CONFIG_NET_MULTI */ 791 NetSetTimeout (10000UL, PingTimeout); 792 NetSetHandler (PingHandler); 793 794 PingSend(); 795 } 796 #endif 797 798 #if defined(CONFIG_CMD_CDP) 799 800 #define CDP_DEVICE_ID_TLV 0x0001 801 #define CDP_ADDRESS_TLV 0x0002 802 #define CDP_PORT_ID_TLV 0x0003 803 #define CDP_CAPABILITIES_TLV 0x0004 804 #define CDP_VERSION_TLV 0x0005 805 #define CDP_PLATFORM_TLV 0x0006 806 #define CDP_NATIVE_VLAN_TLV 0x000a 807 #define CDP_APPLIANCE_VLAN_TLV 0x000e 808 #define CDP_TRIGGER_TLV 0x000f 809 #define CDP_POWER_CONSUMPTION_TLV 0x0010 810 #define CDP_SYSNAME_TLV 0x0014 811 #define CDP_SYSOBJECT_TLV 0x0015 812 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 813 814 #define CDP_TIMEOUT 250UL /* one packet every 250ms */ 815 816 static int CDPSeq; 817 static int CDPOK; 818 819 ushort CDPNativeVLAN; 820 ushort CDPApplianceVLAN; 821 822 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 823 824 static ushort CDP_compute_csum(const uchar *buff, ushort len) 825 { 826 ushort csum; 827 int odd; 828 ulong result = 0; 829 ushort leftover; 830 ushort *p; 831 832 if (len > 0) { 833 odd = 1 & (ulong)buff; 834 if (odd) { 835 result = *buff << 8; 836 len--; 837 buff++; 838 } 839 while (len > 1) { 840 p = (ushort *)buff; 841 result += *p++; 842 buff = (uchar *)p; 843 if (result & 0x80000000) 844 result = (result & 0xFFFF) + (result >> 16); 845 len -= 2; 846 } 847 if (len) { 848 leftover = (signed short)(*(const signed char *)buff); 849 /* CISCO SUCKS big time! (and blows too): 850 * CDP uses the IP checksum algorithm with a twist; 851 * for the last byte it *sign* extends and sums. 852 */ 853 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 854 } 855 while (result >> 16) 856 result = (result & 0xFFFF) + (result >> 16); 857 858 if (odd) 859 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 860 } 861 862 /* add up 16-bit and 17-bit words for 17+c bits */ 863 result = (result & 0xffff) + (result >> 16); 864 /* add up 16-bit and 2-bit for 16+c bit */ 865 result = (result & 0xffff) + (result >> 16); 866 /* add up carry.. */ 867 result = (result & 0xffff) + (result >> 16); 868 869 /* negate */ 870 csum = ~(ushort)result; 871 872 /* run time endian detection */ 873 if (csum != htons(csum)) /* little endian */ 874 csum = htons(csum); 875 876 return csum; 877 } 878 879 int CDPSendTrigger(void) 880 { 881 volatile uchar *pkt; 882 volatile ushort *s; 883 volatile ushort *cp; 884 Ethernet_t *et; 885 int len; 886 ushort chksum; 887 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 888 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 889 char buf[32]; 890 #endif 891 892 pkt = NetTxPacket; 893 et = (Ethernet_t *)pkt; 894 895 /* NOTE: trigger sent not on any VLAN */ 896 897 /* form ethernet header */ 898 memcpy(et->et_dest, NetCDPAddr, 6); 899 memcpy(et->et_src, NetOurEther, 6); 900 901 pkt += ETHER_HDR_SIZE; 902 903 /* SNAP header */ 904 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 905 pkt += sizeof(CDP_SNAP_hdr); 906 907 /* CDP header */ 908 *pkt++ = 0x02; /* CDP version 2 */ 909 *pkt++ = 180; /* TTL */ 910 s = (volatile ushort *)pkt; 911 cp = s; 912 *s++ = htons(0); /* checksum (0 for later calculation) */ 913 914 /* CDP fields */ 915 #ifdef CONFIG_CDP_DEVICE_ID 916 *s++ = htons(CDP_DEVICE_ID_TLV); 917 *s++ = htons(CONFIG_CDP_DEVICE_ID); 918 memset(buf, 0, sizeof(buf)); 919 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 920 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 921 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 922 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 923 memcpy((uchar *)s, buf, 16); 924 s += 16 / 2; 925 #endif 926 927 #ifdef CONFIG_CDP_PORT_ID 928 *s++ = htons(CDP_PORT_ID_TLV); 929 memset(buf, 0, sizeof(buf)); 930 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 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_CAPABILITIES 940 *s++ = htons(CDP_CAPABILITIES_TLV); 941 *s++ = htons(8); 942 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 943 s += 2; 944 #endif 945 946 #ifdef CONFIG_CDP_VERSION 947 *s++ = htons(CDP_VERSION_TLV); 948 memset(buf, 0, sizeof(buf)); 949 strcpy(buf, CONFIG_CDP_VERSION); 950 len = strlen(buf); 951 if (len & 1) /* make it even */ 952 len++; 953 *s++ = htons(len + 4); 954 memcpy((uchar *)s, buf, len); 955 s += len / 2; 956 #endif 957 958 #ifdef CONFIG_CDP_PLATFORM 959 *s++ = htons(CDP_PLATFORM_TLV); 960 memset(buf, 0, sizeof(buf)); 961 strcpy(buf, CONFIG_CDP_PLATFORM); 962 len = strlen(buf); 963 if (len & 1) /* make it even */ 964 len++; 965 *s++ = htons(len + 4); 966 memcpy((uchar *)s, buf, len); 967 s += len / 2; 968 #endif 969 970 #ifdef CONFIG_CDP_TRIGGER 971 *s++ = htons(CDP_TRIGGER_TLV); 972 *s++ = htons(8); 973 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 974 s += 2; 975 #endif 976 977 #ifdef CONFIG_CDP_POWER_CONSUMPTION 978 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 979 *s++ = htons(6); 980 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 981 #endif 982 983 /* length of ethernet packet */ 984 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 985 et->et_protlen = htons(len); 986 987 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 988 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 989 if (chksum == 0) 990 chksum = 0xFFFF; 991 *cp = htons(chksum); 992 993 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 994 return 0; 995 } 996 997 static void 998 CDPTimeout (void) 999 { 1000 CDPSeq++; 1001 1002 if (CDPSeq < 3) { 1003 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1004 CDPSendTrigger(); 1005 return; 1006 } 1007 1008 /* if not OK try again */ 1009 if (!CDPOK) 1010 NetStartAgain(); 1011 else 1012 NetState = NETLOOP_SUCCESS; 1013 } 1014 1015 static void 1016 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 1017 { 1018 /* nothing */ 1019 } 1020 1021 static void 1022 CDPHandler(const uchar * pkt, unsigned len) 1023 { 1024 const uchar *t; 1025 const ushort *ss; 1026 ushort type, tlen; 1027 uchar applid; 1028 ushort vlan, nvlan; 1029 1030 /* minimum size? */ 1031 if (len < sizeof(CDP_SNAP_hdr) + 4) 1032 goto pkt_short; 1033 1034 /* check for valid CDP SNAP header */ 1035 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1036 return; 1037 1038 pkt += sizeof(CDP_SNAP_hdr); 1039 len -= sizeof(CDP_SNAP_hdr); 1040 1041 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1042 if (pkt[0] < 0x02 || pkt[1] == 0) 1043 return; 1044 1045 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1046 if (pkt[0] != 0x02) 1047 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1048 pkt[0] & 0xff); 1049 1050 if (CDP_compute_csum(pkt, len) != 0) 1051 return; 1052 1053 pkt += 4; 1054 len -= 4; 1055 1056 vlan = htons(-1); 1057 nvlan = htons(-1); 1058 while (len > 0) { 1059 if (len < 4) 1060 goto pkt_short; 1061 1062 ss = (const ushort *)pkt; 1063 type = ntohs(ss[0]); 1064 tlen = ntohs(ss[1]); 1065 if (tlen > len) { 1066 goto pkt_short; 1067 } 1068 1069 pkt += tlen; 1070 len -= tlen; 1071 1072 ss += 2; /* point ss to the data of the TLV */ 1073 tlen -= 4; 1074 1075 switch (type) { 1076 case CDP_DEVICE_ID_TLV: 1077 break; 1078 case CDP_ADDRESS_TLV: 1079 break; 1080 case CDP_PORT_ID_TLV: 1081 break; 1082 case CDP_CAPABILITIES_TLV: 1083 break; 1084 case CDP_VERSION_TLV: 1085 break; 1086 case CDP_PLATFORM_TLV: 1087 break; 1088 case CDP_NATIVE_VLAN_TLV: 1089 nvlan = *ss; 1090 break; 1091 case CDP_APPLIANCE_VLAN_TLV: 1092 t = (const uchar *)ss; 1093 while (tlen > 0) { 1094 if (tlen < 3) 1095 goto pkt_short; 1096 1097 applid = t[0]; 1098 ss = (const ushort *)(t + 1); 1099 1100 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1101 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1102 vlan = *ss; 1103 #else 1104 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1105 #endif 1106 t += 3; tlen -= 3; 1107 } 1108 break; 1109 case CDP_TRIGGER_TLV: 1110 break; 1111 case CDP_POWER_CONSUMPTION_TLV: 1112 break; 1113 case CDP_SYSNAME_TLV: 1114 break; 1115 case CDP_SYSOBJECT_TLV: 1116 break; 1117 case CDP_MANAGEMENT_ADDRESS_TLV: 1118 break; 1119 } 1120 } 1121 1122 CDPApplianceVLAN = vlan; 1123 CDPNativeVLAN = nvlan; 1124 1125 CDPOK = 1; 1126 return; 1127 1128 pkt_short: 1129 printf("** CDP packet is too short\n"); 1130 return; 1131 } 1132 1133 static void CDPStart(void) 1134 { 1135 #if defined(CONFIG_NET_MULTI) 1136 printf ("Using %s device\n", eth_get_name()); 1137 #endif 1138 CDPSeq = 0; 1139 CDPOK = 0; 1140 1141 CDPNativeVLAN = htons(-1); 1142 CDPApplianceVLAN = htons(-1); 1143 1144 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1145 NetSetHandler (CDPDummyHandler); 1146 1147 CDPSendTrigger(); 1148 } 1149 #endif 1150 1151 1152 void 1153 NetReceive(volatile uchar * inpkt, int len) 1154 { 1155 Ethernet_t *et; 1156 IP_t *ip; 1157 ARP_t *arp; 1158 IPaddr_t tmp; 1159 int x; 1160 uchar *pkt; 1161 #if defined(CONFIG_CMD_CDP) 1162 int iscdp; 1163 #endif 1164 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1165 1166 #ifdef ET_DEBUG 1167 printf("packet received\n"); 1168 #endif 1169 1170 NetRxPkt = inpkt; 1171 NetRxPktLen = len; 1172 et = (Ethernet_t *)inpkt; 1173 1174 /* too small packet? */ 1175 if (len < ETHER_HDR_SIZE) 1176 return; 1177 1178 #ifdef CONFIG_API 1179 if (push_packet) { 1180 (*push_packet)(inpkt, len); 1181 return; 1182 } 1183 #endif 1184 1185 #if defined(CONFIG_CMD_CDP) 1186 /* keep track if packet is CDP */ 1187 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1188 #endif 1189 1190 myvlanid = ntohs(NetOurVLAN); 1191 if (myvlanid == (ushort)-1) 1192 myvlanid = VLAN_NONE; 1193 mynvlanid = ntohs(NetOurNativeVLAN); 1194 if (mynvlanid == (ushort)-1) 1195 mynvlanid = VLAN_NONE; 1196 1197 x = ntohs(et->et_protlen); 1198 1199 #ifdef ET_DEBUG 1200 printf("packet received\n"); 1201 #endif 1202 1203 if (x < 1514) { 1204 /* 1205 * Got a 802 packet. Check the other protocol field. 1206 */ 1207 x = ntohs(et->et_prot); 1208 1209 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1210 len -= E802_HDR_SIZE; 1211 1212 } else if (x != PROT_VLAN) { /* normal packet */ 1213 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1214 len -= ETHER_HDR_SIZE; 1215 1216 } else { /* VLAN packet */ 1217 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1218 1219 #ifdef ET_DEBUG 1220 printf("VLAN packet received\n"); 1221 #endif 1222 /* too small packet? */ 1223 if (len < VLAN_ETHER_HDR_SIZE) 1224 return; 1225 1226 /* if no VLAN active */ 1227 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1228 #if defined(CONFIG_CMD_CDP) 1229 && iscdp == 0 1230 #endif 1231 ) 1232 return; 1233 1234 cti = ntohs(vet->vet_tag); 1235 vlanid = cti & VLAN_IDMASK; 1236 x = ntohs(vet->vet_type); 1237 1238 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1239 len -= VLAN_ETHER_HDR_SIZE; 1240 } 1241 1242 #ifdef ET_DEBUG 1243 printf("Receive from protocol 0x%x\n", x); 1244 #endif 1245 1246 #if defined(CONFIG_CMD_CDP) 1247 if (iscdp) { 1248 CDPHandler((uchar *)ip, len); 1249 return; 1250 } 1251 #endif 1252 1253 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1254 if (vlanid == VLAN_NONE) 1255 vlanid = (mynvlanid & VLAN_IDMASK); 1256 /* not matched? */ 1257 if (vlanid != (myvlanid & VLAN_IDMASK)) 1258 return; 1259 } 1260 1261 switch (x) { 1262 1263 case PROT_ARP: 1264 /* 1265 * We have to deal with two types of ARP packets: 1266 * - REQUEST packets will be answered by sending our 1267 * IP address - if we know it. 1268 * - REPLY packates are expected only after we asked 1269 * for the TFTP server's or the gateway's ethernet 1270 * address; so if we receive such a packet, we set 1271 * the server ethernet address 1272 */ 1273 #ifdef ET_DEBUG 1274 puts ("Got ARP\n"); 1275 #endif 1276 arp = (ARP_t *)ip; 1277 if (len < ARP_HDR_SIZE) { 1278 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1279 return; 1280 } 1281 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1282 return; 1283 } 1284 if (ntohs(arp->ar_pro) != PROT_IP) { 1285 return; 1286 } 1287 if (arp->ar_hln != 6) { 1288 return; 1289 } 1290 if (arp->ar_pln != 4) { 1291 return; 1292 } 1293 1294 if (NetOurIP == 0) { 1295 return; 1296 } 1297 1298 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1299 return; 1300 } 1301 1302 switch (ntohs(arp->ar_op)) { 1303 case ARPOP_REQUEST: /* reply with our IP address */ 1304 #ifdef ET_DEBUG 1305 puts ("Got ARP REQUEST, return our IP\n"); 1306 #endif 1307 pkt = (uchar *)et; 1308 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1309 arp->ar_op = htons(ARPOP_REPLY); 1310 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1311 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1312 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1313 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1314 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1315 return; 1316 1317 case ARPOP_REPLY: /* arp reply */ 1318 /* are we waiting for a reply */ 1319 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1320 break; 1321 #ifdef ET_DEBUG 1322 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1323 arp->ar_data[0], arp->ar_data[1], 1324 arp->ar_data[2], arp->ar_data[3], 1325 arp->ar_data[4], arp->ar_data[5]); 1326 #endif 1327 1328 tmp = NetReadIP(&arp->ar_data[6]); 1329 1330 /* matched waiting packet's address */ 1331 if (tmp == NetArpWaitReplyIP) { 1332 #ifdef ET_DEBUG 1333 puts ("Got it\n"); 1334 #endif 1335 /* save address for later use */ 1336 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1337 1338 #ifdef CONFIG_NETCONSOLE 1339 (*packetHandler)(0,0,0,0); 1340 #endif 1341 /* modify header, and transmit it */ 1342 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1343 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1344 1345 /* no arp request pending now */ 1346 NetArpWaitPacketIP = 0; 1347 NetArpWaitTxPacketSize = 0; 1348 NetArpWaitPacketMAC = NULL; 1349 1350 } 1351 return; 1352 default: 1353 #ifdef ET_DEBUG 1354 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1355 #endif 1356 return; 1357 } 1358 break; 1359 1360 case PROT_RARP: 1361 #ifdef ET_DEBUG 1362 puts ("Got RARP\n"); 1363 #endif 1364 arp = (ARP_t *)ip; 1365 if (len < ARP_HDR_SIZE) { 1366 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1367 return; 1368 } 1369 1370 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1371 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1372 (ntohs(arp->ar_pro) != PROT_IP) || 1373 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1374 1375 puts ("invalid RARP header\n"); 1376 } else { 1377 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1378 if (NetServerIP == 0) 1379 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1380 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1381 1382 (*packetHandler)(0,0,0,0); 1383 } 1384 break; 1385 1386 case PROT_IP: 1387 #ifdef ET_DEBUG 1388 puts ("Got IP\n"); 1389 #endif 1390 if (len < IP_HDR_SIZE) { 1391 debug ("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE); 1392 return; 1393 } 1394 if (len < ntohs(ip->ip_len)) { 1395 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1396 return; 1397 } 1398 len = ntohs(ip->ip_len); 1399 #ifdef ET_DEBUG 1400 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1401 #endif 1402 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1403 return; 1404 } 1405 /* Can't deal with fragments */ 1406 if (ip->ip_off & htons(IP_OFFS | IP_FLAGS_MFRAG)) { 1407 return; 1408 } 1409 /* can't deal with headers > 20 bytes */ 1410 if ((ip->ip_hl_v & 0x0f) > 0x05) { 1411 return; 1412 } 1413 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1414 puts ("checksum bad\n"); 1415 return; 1416 } 1417 tmp = NetReadIP(&ip->ip_dst); 1418 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1419 #ifdef CONFIG_MCAST_TFTP 1420 if (Mcast_addr != tmp) 1421 #endif 1422 return; 1423 } 1424 /* 1425 * watch for ICMP host redirects 1426 * 1427 * There is no real handler code (yet). We just watch 1428 * for ICMP host redirect messages. In case anybody 1429 * sees these messages: please contact me 1430 * (wd@denx.de), or - even better - send me the 1431 * necessary fixes :-) 1432 * 1433 * Note: in all cases where I have seen this so far 1434 * it was a problem with the router configuration, 1435 * for instance when a router was configured in the 1436 * BOOTP reply, but the TFTP server was on the same 1437 * subnet. So this is probably a warning that your 1438 * configuration might be wrong. But I'm not really 1439 * sure if there aren't any other situations. 1440 */ 1441 if (ip->ip_p == IPPROTO_ICMP) { 1442 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1443 1444 switch (icmph->type) { 1445 case ICMP_REDIRECT: 1446 if (icmph->code != ICMP_REDIR_HOST) 1447 return; 1448 puts (" ICMP Host Redirect to "); 1449 print_IPaddr(icmph->un.gateway); 1450 putc(' '); 1451 return; 1452 #if defined(CONFIG_CMD_PING) 1453 case ICMP_ECHO_REPLY: 1454 /* 1455 * IP header OK. Pass the packet to the current handler. 1456 */ 1457 /* XXX point to ip packet */ 1458 (*packetHandler)((uchar *)ip, 0, 0, 0); 1459 return; 1460 case ICMP_ECHO_REQUEST: 1461 #ifdef ET_DEBUG 1462 printf ("Got ICMP ECHO REQUEST, return %d bytes \n", 1463 ETHER_HDR_SIZE + len); 1464 #endif 1465 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1466 memcpy (&et->et_src[ 0], NetOurEther, 6); 1467 1468 ip->ip_sum = 0; 1469 ip->ip_off = 0; 1470 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1471 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1472 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1473 1474 icmph->type = ICMP_ECHO_REPLY; 1475 icmph->checksum = 0; 1476 icmph->checksum = ~NetCksum((uchar *)icmph, 1477 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1478 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1479 return; 1480 #endif 1481 default: 1482 return; 1483 } 1484 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1485 return; 1486 } 1487 1488 #ifdef CONFIG_UDP_CHECKSUM 1489 if (ip->udp_xsum != 0) { 1490 ulong xsum; 1491 ushort *sumptr; 1492 ushort sumlen; 1493 1494 xsum = ip->ip_p; 1495 xsum += (ntohs(ip->udp_len)); 1496 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1497 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1498 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1499 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1500 1501 sumlen = ntohs(ip->udp_len); 1502 sumptr = (ushort *) &(ip->udp_src); 1503 1504 while (sumlen > 1) { 1505 ushort sumdata; 1506 1507 sumdata = *sumptr++; 1508 xsum += ntohs(sumdata); 1509 sumlen -= 2; 1510 } 1511 if (sumlen > 0) { 1512 ushort sumdata; 1513 1514 sumdata = *(unsigned char *) sumptr; 1515 sumdata = (sumdata << 8) & 0xff00; 1516 xsum += sumdata; 1517 } 1518 while ((xsum >> 16) != 0) { 1519 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1520 } 1521 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1522 printf(" UDP wrong checksum %08lx %08x\n", 1523 xsum, ntohs(ip->udp_xsum)); 1524 return; 1525 } 1526 } 1527 #endif 1528 1529 1530 #ifdef CONFIG_NETCONSOLE 1531 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1532 ntohs(ip->udp_dst), 1533 ntohs(ip->udp_src), 1534 ntohs(ip->udp_len) - 8); 1535 #endif 1536 /* 1537 * IP header OK. Pass the packet to the current handler. 1538 */ 1539 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1540 ntohs(ip->udp_dst), 1541 ntohs(ip->udp_src), 1542 ntohs(ip->udp_len) - 8); 1543 break; 1544 } 1545 } 1546 1547 1548 /**********************************************************************/ 1549 1550 static int net_check_prereq (proto_t protocol) 1551 { 1552 switch (protocol) { 1553 /* Fall through */ 1554 #if defined(CONFIG_CMD_PING) 1555 case PING: 1556 if (NetPingIP == 0) { 1557 puts ("*** ERROR: ping address not given\n"); 1558 return (1); 1559 } 1560 goto common; 1561 #endif 1562 #if defined(CONFIG_CMD_SNTP) 1563 case SNTP: 1564 if (NetNtpServerIP == 0) { 1565 puts ("*** ERROR: NTP server address not given\n"); 1566 return (1); 1567 } 1568 goto common; 1569 #endif 1570 #if defined(CONFIG_CMD_NFS) 1571 case NFS: 1572 #endif 1573 case NETCONS: 1574 case TFTP: 1575 if (NetServerIP == 0) { 1576 puts ("*** ERROR: `serverip' not set\n"); 1577 return (1); 1578 } 1579 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) 1580 common: 1581 #endif 1582 1583 if (NetOurIP == 0) { 1584 puts ("*** ERROR: `ipaddr' not set\n"); 1585 return (1); 1586 } 1587 /* Fall through */ 1588 1589 case DHCP: 1590 case RARP: 1591 case BOOTP: 1592 case CDP: 1593 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1594 #ifdef CONFIG_NET_MULTI 1595 extern int eth_get_dev_index (void); 1596 int num = eth_get_dev_index (); 1597 1598 switch (num) { 1599 case -1: 1600 puts ("*** ERROR: No ethernet found.\n"); 1601 return (1); 1602 case 0: 1603 puts ("*** ERROR: `ethaddr' not set\n"); 1604 break; 1605 default: 1606 printf ("*** ERROR: `eth%daddr' not set\n", 1607 num); 1608 break; 1609 } 1610 1611 NetStartAgain (); 1612 return (2); 1613 #else 1614 puts ("*** ERROR: `ethaddr' not set\n"); 1615 return (1); 1616 #endif 1617 } 1618 /* Fall through */ 1619 default: 1620 return (0); 1621 } 1622 return (0); /* OK */ 1623 } 1624 /**********************************************************************/ 1625 1626 int 1627 NetCksumOk(uchar * ptr, int len) 1628 { 1629 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1630 } 1631 1632 1633 unsigned 1634 NetCksum(uchar * ptr, int len) 1635 { 1636 ulong xsum; 1637 ushort *p = (ushort *)ptr; 1638 1639 xsum = 0; 1640 while (len-- > 0) 1641 xsum += *p++; 1642 xsum = (xsum & 0xffff) + (xsum >> 16); 1643 xsum = (xsum & 0xffff) + (xsum >> 16); 1644 return (xsum & 0xffff); 1645 } 1646 1647 int 1648 NetEthHdrSize(void) 1649 { 1650 ushort myvlanid; 1651 1652 myvlanid = ntohs(NetOurVLAN); 1653 if (myvlanid == (ushort)-1) 1654 myvlanid = VLAN_NONE; 1655 1656 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1657 } 1658 1659 int 1660 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1661 { 1662 Ethernet_t *et = (Ethernet_t *)xet; 1663 ushort myvlanid; 1664 1665 myvlanid = ntohs(NetOurVLAN); 1666 if (myvlanid == (ushort)-1) 1667 myvlanid = VLAN_NONE; 1668 1669 memcpy (et->et_dest, addr, 6); 1670 memcpy (et->et_src, NetOurEther, 6); 1671 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1672 et->et_protlen = htons(prot); 1673 return ETHER_HDR_SIZE; 1674 } else { 1675 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1676 1677 vet->vet_vlan_type = htons(PROT_VLAN); 1678 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1679 vet->vet_type = htons(prot); 1680 return VLAN_ETHER_HDR_SIZE; 1681 } 1682 } 1683 1684 void 1685 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1686 { 1687 volatile IP_t *ip = (IP_t *)xip; 1688 1689 /* 1690 * If the data is an odd number of bytes, zero the 1691 * byte after the last byte so that the checksum 1692 * will work. 1693 */ 1694 if (len & 1) 1695 xip[IP_HDR_SIZE + len] = 0; 1696 1697 /* 1698 * Construct an IP and UDP header. 1699 * (need to set no fragment bit - XXX) 1700 */ 1701 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1702 ip->ip_tos = 0; 1703 ip->ip_len = htons(IP_HDR_SIZE + len); 1704 ip->ip_id = htons(NetIPID++); 1705 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1706 ip->ip_ttl = 255; 1707 ip->ip_p = 17; /* UDP */ 1708 ip->ip_sum = 0; 1709 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1710 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1711 ip->udp_src = htons(sport); 1712 ip->udp_dst = htons(dport); 1713 ip->udp_len = htons(8 + len); 1714 ip->udp_xsum = 0; 1715 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1716 } 1717 1718 void copy_filename (char *dst, char *src, int size) 1719 { 1720 if (*src && (*src == '"')) { 1721 ++src; 1722 --size; 1723 } 1724 1725 while ((--size > 0) && *src && (*src != '"')) { 1726 *dst++ = *src++; 1727 } 1728 *dst = '\0'; 1729 } 1730 1731 #endif 1732 1733 void ip_to_string (IPaddr_t x, char *s) 1734 { 1735 x = ntohl (x); 1736 sprintf (s, "%d.%d.%d.%d", 1737 (int) ((x >> 24) & 0xff), 1738 (int) ((x >> 16) & 0xff), 1739 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1740 ); 1741 } 1742 1743 IPaddr_t string_to_ip(char *s) 1744 { 1745 IPaddr_t addr; 1746 char *e; 1747 int i; 1748 1749 if (s == NULL) 1750 return(0); 1751 1752 for (addr=0, i=0; i<4; ++i) { 1753 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1754 addr <<= 8; 1755 addr |= (val & 0xFF); 1756 if (s) { 1757 s = (*e) ? e+1 : e; 1758 } 1759 } 1760 1761 return (htonl(addr)); 1762 } 1763 1764 void VLAN_to_string(ushort x, char *s) 1765 { 1766 x = ntohs(x); 1767 1768 if (x == (ushort)-1) 1769 x = VLAN_NONE; 1770 1771 if (x == VLAN_NONE) 1772 strcpy(s, "none"); 1773 else 1774 sprintf(s, "%d", x & VLAN_IDMASK); 1775 } 1776 1777 ushort string_to_VLAN(char *s) 1778 { 1779 ushort id; 1780 1781 if (s == NULL) 1782 return htons(VLAN_NONE); 1783 1784 if (*s < '0' || *s > '9') 1785 id = VLAN_NONE; 1786 else 1787 id = (ushort)simple_strtoul(s, NULL, 10); 1788 1789 return htons(id); 1790 } 1791 1792 void print_IPaddr (IPaddr_t x) 1793 { 1794 char tmp[16]; 1795 1796 ip_to_string (x, tmp); 1797 1798 puts (tmp); 1799 } 1800 1801 IPaddr_t getenv_IPaddr (char *var) 1802 { 1803 return (string_to_ip(getenv(var))); 1804 } 1805 1806 ushort getenv_VLAN(char *var) 1807 { 1808 return (string_to_VLAN(getenv(var))); 1809 } 1810