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 memcpy (NetOurEther, bd->bi_enetaddr, 6); 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/%02x:%02x:%02x:%02x:%02x:%02x\n", 713 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 714 #endif 715 716 pkt = (uchar *)NetTxPacket; 717 pkt += NetSetEther (pkt, ether, PROT_IP); 718 NetSetIP (pkt, dest, dport, sport, len); 719 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 720 721 return 0; /* transmitted */ 722 } 723 724 #if defined(CONFIG_CMD_PING) 725 static ushort PingSeqNo; 726 727 int PingSend(void) 728 { 729 static uchar mac[6]; 730 volatile IP_t *ip; 731 volatile ushort *s; 732 uchar *pkt; 733 734 /* XXX always send arp request */ 735 736 memcpy(mac, NetEtherNullAddr, 6); 737 738 #ifdef ET_DEBUG 739 printf("sending ARP for %08lx\n", NetPingIP); 740 #endif 741 742 NetArpWaitPacketIP = NetPingIP; 743 NetArpWaitPacketMAC = mac; 744 745 pkt = NetArpWaitTxPacket; 746 pkt += NetSetEther(pkt, mac, PROT_IP); 747 748 ip = (volatile IP_t *)pkt; 749 750 /* 751 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 752 */ 753 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 754 ip->ip_tos = 0; 755 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 756 ip->ip_id = htons(NetIPID++); 757 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 758 ip->ip_ttl = 255; 759 ip->ip_p = 0x01; /* ICMP */ 760 ip->ip_sum = 0; 761 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 762 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 763 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 764 765 s = &ip->udp_src; /* XXX ICMP starts here */ 766 s[0] = htons(0x0800); /* echo-request, code */ 767 s[1] = 0; /* checksum */ 768 s[2] = 0; /* identifier */ 769 s[3] = htons(PingSeqNo++); /* sequence number */ 770 s[1] = ~NetCksum((uchar *)s, 8/2); 771 772 /* size of the waiting packet */ 773 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 774 775 /* and do the ARP request */ 776 NetArpWaitTry = 1; 777 NetArpWaitTimerStart = get_timer(0); 778 ArpRequest(); 779 return 1; /* waiting */ 780 } 781 782 static void 783 PingTimeout (void) 784 { 785 eth_halt(); 786 NetState = NETLOOP_FAIL; /* we did not get the reply */ 787 } 788 789 static void 790 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 791 { 792 IPaddr_t tmp; 793 volatile IP_t *ip = (volatile IP_t *)pkt; 794 795 tmp = NetReadIP((void *)&ip->ip_src); 796 if (tmp != NetPingIP) 797 return; 798 799 NetState = NETLOOP_SUCCESS; 800 } 801 802 static void PingStart(void) 803 { 804 #if defined(CONFIG_NET_MULTI) 805 printf ("Using %s device\n", eth_get_name()); 806 #endif /* CONFIG_NET_MULTI */ 807 NetSetTimeout (10000UL, PingTimeout); 808 NetSetHandler (PingHandler); 809 810 PingSend(); 811 } 812 #endif 813 814 #if defined(CONFIG_CMD_CDP) 815 816 #define CDP_DEVICE_ID_TLV 0x0001 817 #define CDP_ADDRESS_TLV 0x0002 818 #define CDP_PORT_ID_TLV 0x0003 819 #define CDP_CAPABILITIES_TLV 0x0004 820 #define CDP_VERSION_TLV 0x0005 821 #define CDP_PLATFORM_TLV 0x0006 822 #define CDP_NATIVE_VLAN_TLV 0x000a 823 #define CDP_APPLIANCE_VLAN_TLV 0x000e 824 #define CDP_TRIGGER_TLV 0x000f 825 #define CDP_POWER_CONSUMPTION_TLV 0x0010 826 #define CDP_SYSNAME_TLV 0x0014 827 #define CDP_SYSOBJECT_TLV 0x0015 828 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 829 830 #define CDP_TIMEOUT 250UL /* one packet every 250ms */ 831 832 static int CDPSeq; 833 static int CDPOK; 834 835 ushort CDPNativeVLAN; 836 ushort CDPApplianceVLAN; 837 838 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 839 840 static ushort CDP_compute_csum(const uchar *buff, ushort len) 841 { 842 ushort csum; 843 int odd; 844 ulong result = 0; 845 ushort leftover; 846 ushort *p; 847 848 if (len > 0) { 849 odd = 1 & (ulong)buff; 850 if (odd) { 851 result = *buff << 8; 852 len--; 853 buff++; 854 } 855 while (len > 1) { 856 p = (ushort *)buff; 857 result += *p++; 858 buff = (uchar *)p; 859 if (result & 0x80000000) 860 result = (result & 0xFFFF) + (result >> 16); 861 len -= 2; 862 } 863 if (len) { 864 leftover = (signed short)(*(const signed char *)buff); 865 /* CISCO SUCKS big time! (and blows too): 866 * CDP uses the IP checksum algorithm with a twist; 867 * for the last byte it *sign* extends and sums. 868 */ 869 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 870 } 871 while (result >> 16) 872 result = (result & 0xFFFF) + (result >> 16); 873 874 if (odd) 875 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 876 } 877 878 /* add up 16-bit and 17-bit words for 17+c bits */ 879 result = (result & 0xffff) + (result >> 16); 880 /* add up 16-bit and 2-bit for 16+c bit */ 881 result = (result & 0xffff) + (result >> 16); 882 /* add up carry.. */ 883 result = (result & 0xffff) + (result >> 16); 884 885 /* negate */ 886 csum = ~(ushort)result; 887 888 /* run time endian detection */ 889 if (csum != htons(csum)) /* little endian */ 890 csum = htons(csum); 891 892 return csum; 893 } 894 895 int CDPSendTrigger(void) 896 { 897 volatile uchar *pkt; 898 volatile ushort *s; 899 volatile ushort *cp; 900 Ethernet_t *et; 901 int len; 902 ushort chksum; 903 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 904 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 905 char buf[32]; 906 #endif 907 908 pkt = NetTxPacket; 909 et = (Ethernet_t *)pkt; 910 911 /* NOTE: trigger sent not on any VLAN */ 912 913 /* form ethernet header */ 914 memcpy(et->et_dest, NetCDPAddr, 6); 915 memcpy(et->et_src, NetOurEther, 6); 916 917 pkt += ETHER_HDR_SIZE; 918 919 /* SNAP header */ 920 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 921 pkt += sizeof(CDP_SNAP_hdr); 922 923 /* CDP header */ 924 *pkt++ = 0x02; /* CDP version 2 */ 925 *pkt++ = 180; /* TTL */ 926 s = (volatile ushort *)pkt; 927 cp = s; 928 *s++ = htons(0); /* checksum (0 for later calculation) */ 929 930 /* CDP fields */ 931 #ifdef CONFIG_CDP_DEVICE_ID 932 *s++ = htons(CDP_DEVICE_ID_TLV); 933 *s++ = htons(CONFIG_CDP_DEVICE_ID); 934 memset(buf, 0, sizeof(buf)); 935 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 936 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 937 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 938 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 939 memcpy((uchar *)s, buf, 16); 940 s += 16 / 2; 941 #endif 942 943 #ifdef CONFIG_CDP_PORT_ID 944 *s++ = htons(CDP_PORT_ID_TLV); 945 memset(buf, 0, sizeof(buf)); 946 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 947 len = strlen(buf); 948 if (len & 1) /* make it even */ 949 len++; 950 *s++ = htons(len + 4); 951 memcpy((uchar *)s, buf, len); 952 s += len / 2; 953 #endif 954 955 #ifdef CONFIG_CDP_CAPABILITIES 956 *s++ = htons(CDP_CAPABILITIES_TLV); 957 *s++ = htons(8); 958 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 959 s += 2; 960 #endif 961 962 #ifdef CONFIG_CDP_VERSION 963 *s++ = htons(CDP_VERSION_TLV); 964 memset(buf, 0, sizeof(buf)); 965 strcpy(buf, CONFIG_CDP_VERSION); 966 len = strlen(buf); 967 if (len & 1) /* make it even */ 968 len++; 969 *s++ = htons(len + 4); 970 memcpy((uchar *)s, buf, len); 971 s += len / 2; 972 #endif 973 974 #ifdef CONFIG_CDP_PLATFORM 975 *s++ = htons(CDP_PLATFORM_TLV); 976 memset(buf, 0, sizeof(buf)); 977 strcpy(buf, CONFIG_CDP_PLATFORM); 978 len = strlen(buf); 979 if (len & 1) /* make it even */ 980 len++; 981 *s++ = htons(len + 4); 982 memcpy((uchar *)s, buf, len); 983 s += len / 2; 984 #endif 985 986 #ifdef CONFIG_CDP_TRIGGER 987 *s++ = htons(CDP_TRIGGER_TLV); 988 *s++ = htons(8); 989 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 990 s += 2; 991 #endif 992 993 #ifdef CONFIG_CDP_POWER_CONSUMPTION 994 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 995 *s++ = htons(6); 996 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 997 #endif 998 999 /* length of ethernet packet */ 1000 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 1001 et->et_protlen = htons(len); 1002 1003 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 1004 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 1005 if (chksum == 0) 1006 chksum = 0xFFFF; 1007 *cp = htons(chksum); 1008 1009 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 1010 return 0; 1011 } 1012 1013 static void 1014 CDPTimeout (void) 1015 { 1016 CDPSeq++; 1017 1018 if (CDPSeq < 3) { 1019 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1020 CDPSendTrigger(); 1021 return; 1022 } 1023 1024 /* if not OK try again */ 1025 if (!CDPOK) 1026 NetStartAgain(); 1027 else 1028 NetState = NETLOOP_SUCCESS; 1029 } 1030 1031 static void 1032 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 1033 { 1034 /* nothing */ 1035 } 1036 1037 static void 1038 CDPHandler(const uchar * pkt, unsigned len) 1039 { 1040 const uchar *t; 1041 const ushort *ss; 1042 ushort type, tlen; 1043 uchar applid; 1044 ushort vlan, nvlan; 1045 1046 /* minimum size? */ 1047 if (len < sizeof(CDP_SNAP_hdr) + 4) 1048 goto pkt_short; 1049 1050 /* check for valid CDP SNAP header */ 1051 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1052 return; 1053 1054 pkt += sizeof(CDP_SNAP_hdr); 1055 len -= sizeof(CDP_SNAP_hdr); 1056 1057 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1058 if (pkt[0] < 0x02 || pkt[1] == 0) 1059 return; 1060 1061 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1062 if (pkt[0] != 0x02) 1063 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1064 pkt[0] & 0xff); 1065 1066 if (CDP_compute_csum(pkt, len) != 0) 1067 return; 1068 1069 pkt += 4; 1070 len -= 4; 1071 1072 vlan = htons(-1); 1073 nvlan = htons(-1); 1074 while (len > 0) { 1075 if (len < 4) 1076 goto pkt_short; 1077 1078 ss = (const ushort *)pkt; 1079 type = ntohs(ss[0]); 1080 tlen = ntohs(ss[1]); 1081 if (tlen > len) { 1082 goto pkt_short; 1083 } 1084 1085 pkt += tlen; 1086 len -= tlen; 1087 1088 ss += 2; /* point ss to the data of the TLV */ 1089 tlen -= 4; 1090 1091 switch (type) { 1092 case CDP_DEVICE_ID_TLV: 1093 break; 1094 case CDP_ADDRESS_TLV: 1095 break; 1096 case CDP_PORT_ID_TLV: 1097 break; 1098 case CDP_CAPABILITIES_TLV: 1099 break; 1100 case CDP_VERSION_TLV: 1101 break; 1102 case CDP_PLATFORM_TLV: 1103 break; 1104 case CDP_NATIVE_VLAN_TLV: 1105 nvlan = *ss; 1106 break; 1107 case CDP_APPLIANCE_VLAN_TLV: 1108 t = (const uchar *)ss; 1109 while (tlen > 0) { 1110 if (tlen < 3) 1111 goto pkt_short; 1112 1113 applid = t[0]; 1114 ss = (const ushort *)(t + 1); 1115 1116 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1117 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1118 vlan = *ss; 1119 #else 1120 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1121 #endif 1122 t += 3; tlen -= 3; 1123 } 1124 break; 1125 case CDP_TRIGGER_TLV: 1126 break; 1127 case CDP_POWER_CONSUMPTION_TLV: 1128 break; 1129 case CDP_SYSNAME_TLV: 1130 break; 1131 case CDP_SYSOBJECT_TLV: 1132 break; 1133 case CDP_MANAGEMENT_ADDRESS_TLV: 1134 break; 1135 } 1136 } 1137 1138 CDPApplianceVLAN = vlan; 1139 CDPNativeVLAN = nvlan; 1140 1141 CDPOK = 1; 1142 return; 1143 1144 pkt_short: 1145 printf("** CDP packet is too short\n"); 1146 return; 1147 } 1148 1149 static void CDPStart(void) 1150 { 1151 #if defined(CONFIG_NET_MULTI) 1152 printf ("Using %s device\n", eth_get_name()); 1153 #endif 1154 CDPSeq = 0; 1155 CDPOK = 0; 1156 1157 CDPNativeVLAN = htons(-1); 1158 CDPApplianceVLAN = htons(-1); 1159 1160 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1161 NetSetHandler (CDPDummyHandler); 1162 1163 CDPSendTrigger(); 1164 } 1165 #endif 1166 1167 1168 void 1169 NetReceive(volatile uchar * inpkt, int len) 1170 { 1171 Ethernet_t *et; 1172 IP_t *ip; 1173 ARP_t *arp; 1174 IPaddr_t tmp; 1175 int x; 1176 uchar *pkt; 1177 #if defined(CONFIG_CMD_CDP) 1178 int iscdp; 1179 #endif 1180 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1181 1182 #ifdef ET_DEBUG 1183 printf("packet received\n"); 1184 #endif 1185 1186 NetRxPkt = inpkt; 1187 NetRxPktLen = len; 1188 et = (Ethernet_t *)inpkt; 1189 1190 /* too small packet? */ 1191 if (len < ETHER_HDR_SIZE) 1192 return; 1193 1194 #ifdef CONFIG_API 1195 if (push_packet) { 1196 (*push_packet)(inpkt, len); 1197 return; 1198 } 1199 #endif 1200 1201 #if defined(CONFIG_CMD_CDP) 1202 /* keep track if packet is CDP */ 1203 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1204 #endif 1205 1206 myvlanid = ntohs(NetOurVLAN); 1207 if (myvlanid == (ushort)-1) 1208 myvlanid = VLAN_NONE; 1209 mynvlanid = ntohs(NetOurNativeVLAN); 1210 if (mynvlanid == (ushort)-1) 1211 mynvlanid = VLAN_NONE; 1212 1213 x = ntohs(et->et_protlen); 1214 1215 #ifdef ET_DEBUG 1216 printf("packet received\n"); 1217 #endif 1218 1219 if (x < 1514) { 1220 /* 1221 * Got a 802 packet. Check the other protocol field. 1222 */ 1223 x = ntohs(et->et_prot); 1224 1225 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1226 len -= E802_HDR_SIZE; 1227 1228 } else if (x != PROT_VLAN) { /* normal packet */ 1229 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1230 len -= ETHER_HDR_SIZE; 1231 1232 } else { /* VLAN packet */ 1233 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1234 1235 #ifdef ET_DEBUG 1236 printf("VLAN packet received\n"); 1237 #endif 1238 /* too small packet? */ 1239 if (len < VLAN_ETHER_HDR_SIZE) 1240 return; 1241 1242 /* if no VLAN active */ 1243 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1244 #if defined(CONFIG_CMD_CDP) 1245 && iscdp == 0 1246 #endif 1247 ) 1248 return; 1249 1250 cti = ntohs(vet->vet_tag); 1251 vlanid = cti & VLAN_IDMASK; 1252 x = ntohs(vet->vet_type); 1253 1254 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1255 len -= VLAN_ETHER_HDR_SIZE; 1256 } 1257 1258 #ifdef ET_DEBUG 1259 printf("Receive from protocol 0x%x\n", x); 1260 #endif 1261 1262 #if defined(CONFIG_CMD_CDP) 1263 if (iscdp) { 1264 CDPHandler((uchar *)ip, len); 1265 return; 1266 } 1267 #endif 1268 1269 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1270 if (vlanid == VLAN_NONE) 1271 vlanid = (mynvlanid & VLAN_IDMASK); 1272 /* not matched? */ 1273 if (vlanid != (myvlanid & VLAN_IDMASK)) 1274 return; 1275 } 1276 1277 switch (x) { 1278 1279 case PROT_ARP: 1280 /* 1281 * We have to deal with two types of ARP packets: 1282 * - REQUEST packets will be answered by sending our 1283 * IP address - if we know it. 1284 * - REPLY packates are expected only after we asked 1285 * for the TFTP server's or the gateway's ethernet 1286 * address; so if we receive such a packet, we set 1287 * the server ethernet address 1288 */ 1289 #ifdef ET_DEBUG 1290 puts ("Got ARP\n"); 1291 #endif 1292 arp = (ARP_t *)ip; 1293 if (len < ARP_HDR_SIZE) { 1294 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1295 return; 1296 } 1297 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1298 return; 1299 } 1300 if (ntohs(arp->ar_pro) != PROT_IP) { 1301 return; 1302 } 1303 if (arp->ar_hln != 6) { 1304 return; 1305 } 1306 if (arp->ar_pln != 4) { 1307 return; 1308 } 1309 1310 if (NetOurIP == 0) { 1311 return; 1312 } 1313 1314 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1315 return; 1316 } 1317 1318 switch (ntohs(arp->ar_op)) { 1319 case ARPOP_REQUEST: /* reply with our IP address */ 1320 #ifdef ET_DEBUG 1321 puts ("Got ARP REQUEST, return our IP\n"); 1322 #endif 1323 pkt = (uchar *)et; 1324 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1325 arp->ar_op = htons(ARPOP_REPLY); 1326 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1327 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1328 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1329 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1330 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1331 return; 1332 1333 case ARPOP_REPLY: /* arp reply */ 1334 /* are we waiting for a reply */ 1335 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1336 break; 1337 #ifdef ET_DEBUG 1338 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1339 arp->ar_data[0], arp->ar_data[1], 1340 arp->ar_data[2], arp->ar_data[3], 1341 arp->ar_data[4], arp->ar_data[5]); 1342 #endif 1343 1344 tmp = NetReadIP(&arp->ar_data[6]); 1345 1346 /* matched waiting packet's address */ 1347 if (tmp == NetArpWaitReplyIP) { 1348 #ifdef ET_DEBUG 1349 puts ("Got it\n"); 1350 #endif 1351 /* save address for later use */ 1352 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1353 1354 #ifdef CONFIG_NETCONSOLE 1355 (*packetHandler)(0,0,0,0); 1356 #endif 1357 /* modify header, and transmit it */ 1358 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1359 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1360 1361 /* no arp request pending now */ 1362 NetArpWaitPacketIP = 0; 1363 NetArpWaitTxPacketSize = 0; 1364 NetArpWaitPacketMAC = NULL; 1365 1366 } 1367 return; 1368 default: 1369 #ifdef ET_DEBUG 1370 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1371 #endif 1372 return; 1373 } 1374 break; 1375 1376 case PROT_RARP: 1377 #ifdef ET_DEBUG 1378 puts ("Got RARP\n"); 1379 #endif 1380 arp = (ARP_t *)ip; 1381 if (len < ARP_HDR_SIZE) { 1382 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1383 return; 1384 } 1385 1386 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1387 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1388 (ntohs(arp->ar_pro) != PROT_IP) || 1389 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1390 1391 puts ("invalid RARP header\n"); 1392 } else { 1393 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1394 if (NetServerIP == 0) 1395 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1396 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1397 1398 (*packetHandler)(0,0,0,0); 1399 } 1400 break; 1401 1402 case PROT_IP: 1403 #ifdef ET_DEBUG 1404 puts ("Got IP\n"); 1405 #endif 1406 if (len < IP_HDR_SIZE) { 1407 debug ("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE); 1408 return; 1409 } 1410 if (len < ntohs(ip->ip_len)) { 1411 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1412 return; 1413 } 1414 len = ntohs(ip->ip_len); 1415 #ifdef ET_DEBUG 1416 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1417 #endif 1418 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1419 return; 1420 } 1421 /* Can't deal with fragments */ 1422 if (ip->ip_off & htons(IP_OFFS | IP_FLAGS_MFRAG)) { 1423 return; 1424 } 1425 /* can't deal with headers > 20 bytes */ 1426 if ((ip->ip_hl_v & 0x0f) > 0x05) { 1427 return; 1428 } 1429 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1430 puts ("checksum bad\n"); 1431 return; 1432 } 1433 tmp = NetReadIP(&ip->ip_dst); 1434 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1435 #ifdef CONFIG_MCAST_TFTP 1436 if (Mcast_addr != tmp) 1437 #endif 1438 return; 1439 } 1440 /* 1441 * watch for ICMP host redirects 1442 * 1443 * There is no real handler code (yet). We just watch 1444 * for ICMP host redirect messages. In case anybody 1445 * sees these messages: please contact me 1446 * (wd@denx.de), or - even better - send me the 1447 * necessary fixes :-) 1448 * 1449 * Note: in all cases where I have seen this so far 1450 * it was a problem with the router configuration, 1451 * for instance when a router was configured in the 1452 * BOOTP reply, but the TFTP server was on the same 1453 * subnet. So this is probably a warning that your 1454 * configuration might be wrong. But I'm not really 1455 * sure if there aren't any other situations. 1456 */ 1457 if (ip->ip_p == IPPROTO_ICMP) { 1458 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1459 1460 switch (icmph->type) { 1461 case ICMP_REDIRECT: 1462 if (icmph->code != ICMP_REDIR_HOST) 1463 return; 1464 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway); 1465 return; 1466 #if defined(CONFIG_CMD_PING) 1467 case ICMP_ECHO_REPLY: 1468 /* 1469 * IP header OK. Pass the packet to the current handler. 1470 */ 1471 /* XXX point to ip packet */ 1472 (*packetHandler)((uchar *)ip, 0, 0, 0); 1473 return; 1474 case ICMP_ECHO_REQUEST: 1475 #ifdef ET_DEBUG 1476 printf ("Got ICMP ECHO REQUEST, return %d bytes \n", 1477 ETHER_HDR_SIZE + len); 1478 #endif 1479 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1480 memcpy (&et->et_src[ 0], NetOurEther, 6); 1481 1482 ip->ip_sum = 0; 1483 ip->ip_off = 0; 1484 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1485 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1486 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1487 1488 icmph->type = ICMP_ECHO_REPLY; 1489 icmph->checksum = 0; 1490 icmph->checksum = ~NetCksum((uchar *)icmph, 1491 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1492 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1493 return; 1494 #endif 1495 default: 1496 return; 1497 } 1498 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1499 return; 1500 } 1501 1502 #ifdef CONFIG_UDP_CHECKSUM 1503 if (ip->udp_xsum != 0) { 1504 ulong xsum; 1505 ushort *sumptr; 1506 ushort sumlen; 1507 1508 xsum = ip->ip_p; 1509 xsum += (ntohs(ip->udp_len)); 1510 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1511 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1512 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1513 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1514 1515 sumlen = ntohs(ip->udp_len); 1516 sumptr = (ushort *) &(ip->udp_src); 1517 1518 while (sumlen > 1) { 1519 ushort sumdata; 1520 1521 sumdata = *sumptr++; 1522 xsum += ntohs(sumdata); 1523 sumlen -= 2; 1524 } 1525 if (sumlen > 0) { 1526 ushort sumdata; 1527 1528 sumdata = *(unsigned char *) sumptr; 1529 sumdata = (sumdata << 8) & 0xff00; 1530 xsum += sumdata; 1531 } 1532 while ((xsum >> 16) != 0) { 1533 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1534 } 1535 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1536 printf(" UDP wrong checksum %08lx %08x\n", 1537 xsum, ntohs(ip->udp_xsum)); 1538 return; 1539 } 1540 } 1541 #endif 1542 1543 1544 #ifdef CONFIG_NETCONSOLE 1545 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1546 ntohs(ip->udp_dst), 1547 ntohs(ip->udp_src), 1548 ntohs(ip->udp_len) - 8); 1549 #endif 1550 /* 1551 * IP header OK. Pass the packet to the current handler. 1552 */ 1553 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1554 ntohs(ip->udp_dst), 1555 ntohs(ip->udp_src), 1556 ntohs(ip->udp_len) - 8); 1557 break; 1558 } 1559 } 1560 1561 1562 /**********************************************************************/ 1563 1564 static int net_check_prereq (proto_t protocol) 1565 { 1566 switch (protocol) { 1567 /* Fall through */ 1568 #if defined(CONFIG_CMD_PING) 1569 case PING: 1570 if (NetPingIP == 0) { 1571 puts ("*** ERROR: ping address not given\n"); 1572 return (1); 1573 } 1574 goto common; 1575 #endif 1576 #if defined(CONFIG_CMD_SNTP) 1577 case SNTP: 1578 if (NetNtpServerIP == 0) { 1579 puts ("*** ERROR: NTP server address not given\n"); 1580 return (1); 1581 } 1582 goto common; 1583 #endif 1584 #if defined(CONFIG_CMD_NFS) 1585 case NFS: 1586 #endif 1587 case NETCONS: 1588 case TFTP: 1589 if (NetServerIP == 0) { 1590 puts ("*** ERROR: `serverip' not set\n"); 1591 return (1); 1592 } 1593 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) 1594 common: 1595 #endif 1596 1597 if (NetOurIP == 0) { 1598 puts ("*** ERROR: `ipaddr' not set\n"); 1599 return (1); 1600 } 1601 /* Fall through */ 1602 1603 case DHCP: 1604 case RARP: 1605 case BOOTP: 1606 case CDP: 1607 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1608 #ifdef CONFIG_NET_MULTI 1609 extern int eth_get_dev_index (void); 1610 int num = eth_get_dev_index (); 1611 1612 switch (num) { 1613 case -1: 1614 puts ("*** ERROR: No ethernet found.\n"); 1615 return (1); 1616 case 0: 1617 puts ("*** ERROR: `ethaddr' not set\n"); 1618 break; 1619 default: 1620 printf ("*** ERROR: `eth%daddr' not set\n", 1621 num); 1622 break; 1623 } 1624 1625 NetStartAgain (); 1626 return (2); 1627 #else 1628 puts ("*** ERROR: `ethaddr' not set\n"); 1629 return (1); 1630 #endif 1631 } 1632 /* Fall through */ 1633 default: 1634 return (0); 1635 } 1636 return (0); /* OK */ 1637 } 1638 /**********************************************************************/ 1639 1640 int 1641 NetCksumOk(uchar * ptr, int len) 1642 { 1643 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1644 } 1645 1646 1647 unsigned 1648 NetCksum(uchar * ptr, int len) 1649 { 1650 ulong xsum; 1651 ushort *p = (ushort *)ptr; 1652 1653 xsum = 0; 1654 while (len-- > 0) 1655 xsum += *p++; 1656 xsum = (xsum & 0xffff) + (xsum >> 16); 1657 xsum = (xsum & 0xffff) + (xsum >> 16); 1658 return (xsum & 0xffff); 1659 } 1660 1661 int 1662 NetEthHdrSize(void) 1663 { 1664 ushort myvlanid; 1665 1666 myvlanid = ntohs(NetOurVLAN); 1667 if (myvlanid == (ushort)-1) 1668 myvlanid = VLAN_NONE; 1669 1670 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1671 } 1672 1673 int 1674 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1675 { 1676 Ethernet_t *et = (Ethernet_t *)xet; 1677 ushort myvlanid; 1678 1679 myvlanid = ntohs(NetOurVLAN); 1680 if (myvlanid == (ushort)-1) 1681 myvlanid = VLAN_NONE; 1682 1683 memcpy (et->et_dest, addr, 6); 1684 memcpy (et->et_src, NetOurEther, 6); 1685 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1686 et->et_protlen = htons(prot); 1687 return ETHER_HDR_SIZE; 1688 } else { 1689 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1690 1691 vet->vet_vlan_type = htons(PROT_VLAN); 1692 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1693 vet->vet_type = htons(prot); 1694 return VLAN_ETHER_HDR_SIZE; 1695 } 1696 } 1697 1698 void 1699 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1700 { 1701 IP_t *ip = (IP_t *)xip; 1702 1703 /* 1704 * If the data is an odd number of bytes, zero the 1705 * byte after the last byte so that the checksum 1706 * will work. 1707 */ 1708 if (len & 1) 1709 xip[IP_HDR_SIZE + len] = 0; 1710 1711 /* 1712 * Construct an IP and UDP header. 1713 * (need to set no fragment bit - XXX) 1714 */ 1715 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1716 ip->ip_tos = 0; 1717 ip->ip_len = htons(IP_HDR_SIZE + len); 1718 ip->ip_id = htons(NetIPID++); 1719 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1720 ip->ip_ttl = 255; 1721 ip->ip_p = 17; /* UDP */ 1722 ip->ip_sum = 0; 1723 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1724 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1725 ip->udp_src = htons(sport); 1726 ip->udp_dst = htons(dport); 1727 ip->udp_len = htons(8 + len); 1728 ip->udp_xsum = 0; 1729 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1730 } 1731 1732 void copy_filename (char *dst, char *src, int size) 1733 { 1734 if (*src && (*src == '"')) { 1735 ++src; 1736 --size; 1737 } 1738 1739 while ((--size > 0) && *src && (*src != '"')) { 1740 *dst++ = *src++; 1741 } 1742 *dst = '\0'; 1743 } 1744 1745 #endif 1746 1747 void ip_to_string (IPaddr_t x, char *s) 1748 { 1749 x = ntohl (x); 1750 sprintf (s, "%d.%d.%d.%d", 1751 (int) ((x >> 24) & 0xff), 1752 (int) ((x >> 16) & 0xff), 1753 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1754 ); 1755 } 1756 1757 IPaddr_t string_to_ip(char *s) 1758 { 1759 IPaddr_t addr; 1760 char *e; 1761 int i; 1762 1763 if (s == NULL) 1764 return(0); 1765 1766 for (addr=0, i=0; i<4; ++i) { 1767 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1768 addr <<= 8; 1769 addr |= (val & 0xFF); 1770 if (s) { 1771 s = (*e) ? e+1 : e; 1772 } 1773 } 1774 1775 return (htonl(addr)); 1776 } 1777 1778 void VLAN_to_string(ushort x, char *s) 1779 { 1780 x = ntohs(x); 1781 1782 if (x == (ushort)-1) 1783 x = VLAN_NONE; 1784 1785 if (x == VLAN_NONE) 1786 strcpy(s, "none"); 1787 else 1788 sprintf(s, "%d", x & VLAN_IDMASK); 1789 } 1790 1791 ushort string_to_VLAN(char *s) 1792 { 1793 ushort id; 1794 1795 if (s == NULL) 1796 return htons(VLAN_NONE); 1797 1798 if (*s < '0' || *s > '9') 1799 id = VLAN_NONE; 1800 else 1801 id = (ushort)simple_strtoul(s, NULL, 10); 1802 1803 return htons(id); 1804 } 1805 1806 IPaddr_t getenv_IPaddr (char *var) 1807 { 1808 return (string_to_ip(getenv(var))); 1809 } 1810 1811 ushort getenv_VLAN(char *var) 1812 { 1813 return (string_to_VLAN(getenv(var))); 1814 } 1815