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 5000UL /* Milliseconds before trying ARP again */ 99 #else 100 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT 101 #endif 102 103 104 #ifndef CONFIG_NET_RETRY_COUNT 105 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 106 #else 107 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT 108 #endif 109 110 #if 0 111 #define ET_DEBUG 112 #endif 113 114 /** BOOTP EXTENTIONS **/ 115 116 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 117 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 118 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 119 #if defined(CONFIG_BOOTP_DNS2) 120 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 121 #endif 122 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 123 char NetOurHostName[32]={0,}; /* Our hostname */ 124 char NetOurRootPath[64]={0,}; /* Our bootpath */ 125 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 126 127 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 128 IPaddr_t Mcast_addr; 129 #endif 130 131 /** END OF BOOTP EXTENTIONS **/ 132 133 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 134 uchar NetOurEther[6]; /* Our ethernet address */ 135 uchar NetServerEther[6] = /* Boot server enet address */ 136 { 0, 0, 0, 0, 0, 0 }; 137 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 138 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ 139 volatile uchar *NetRxPkt; /* Current receive packet */ 140 int NetRxPktLen; /* Current rx packet length */ 141 unsigned NetIPID; /* IP packet ID */ 142 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 143 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 144 uchar NetEtherNullAddr[6] = 145 { 0, 0, 0, 0, 0, 0 }; 146 #ifdef CONFIG_API 147 void (*push_packet)(volatile void *, int len) = 0; 148 #endif 149 #if defined(CONFIG_CMD_CDP) 150 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 151 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 152 #endif 153 int NetState; /* Network loop state */ 154 #ifdef CONFIG_NET_MULTI 155 int NetRestartWrap = 0; /* Tried all network devices */ 156 static int NetRestarted = 0; /* Network loop restarted */ 157 static int NetDevExists = 0; /* At least one device configured */ 158 #endif 159 160 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 161 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 162 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 163 164 char BootFile[128]; /* Boot File name */ 165 166 #if defined(CONFIG_CMD_PING) 167 IPaddr_t NetPingIP; /* the ip address to ping */ 168 169 static void PingStart(void); 170 #endif 171 172 #if defined(CONFIG_CMD_CDP) 173 static void CDPStart(void); 174 #endif 175 176 #if defined(CONFIG_CMD_SNTP) 177 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 178 int NetTimeOffset=0; /* offset time from UTC */ 179 #endif 180 181 #ifdef CONFIG_NETCONSOLE 182 void NcStart(void); 183 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 184 #endif 185 186 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 187 188 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 189 190 static rxhand_f *packetHandler; /* Current RX packet handler */ 191 static thand_f *timeHandler; /* Current timeout handler */ 192 static ulong timeStart; /* Time base value */ 193 static ulong timeDelta; /* Current timeout value */ 194 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 195 196 static int net_check_prereq (proto_t protocol); 197 198 /**********************************************************************/ 199 200 IPaddr_t NetArpWaitPacketIP; 201 IPaddr_t NetArpWaitReplyIP; 202 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 203 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 204 int NetArpWaitTxPacketSize; 205 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 206 ulong NetArpWaitTimerStart; 207 int NetArpWaitTry; 208 209 void ArpRequest (void) 210 { 211 int i; 212 volatile uchar *pkt; 213 ARP_t *arp; 214 215 #ifdef ET_DEBUG 216 printf ("ARP broadcast %d\n", NetArpWaitTry); 217 #endif 218 pkt = NetTxPacket; 219 220 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 221 222 arp = (ARP_t *) pkt; 223 224 arp->ar_hrd = htons (ARP_ETHER); 225 arp->ar_pro = htons (PROT_IP); 226 arp->ar_hln = 6; 227 arp->ar_pln = 4; 228 arp->ar_op = htons (ARPOP_REQUEST); 229 230 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 231 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 232 for (i = 10; i < 16; ++i) { 233 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 234 } 235 236 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 237 (NetOurIP & NetOurSubnetMask)) { 238 if (NetOurGatewayIP == 0) { 239 puts ("## Warning: gatewayip needed but not set\n"); 240 NetArpWaitReplyIP = NetArpWaitPacketIP; 241 } else { 242 NetArpWaitReplyIP = NetOurGatewayIP; 243 } 244 } else { 245 NetArpWaitReplyIP = NetArpWaitPacketIP; 246 } 247 248 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 249 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 250 } 251 252 void ArpTimeoutCheck(void) 253 { 254 ulong t; 255 256 if (!NetArpWaitPacketIP) 257 return; 258 259 t = get_timer(0); 260 261 /* check for arp timeout */ 262 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) { 263 NetArpWaitTry++; 264 265 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 266 puts ("\nARP Retry count exceeded; starting again\n"); 267 NetArpWaitTry = 0; 268 NetStartAgain(); 269 } else { 270 NetArpWaitTimerStart = t; 271 ArpRequest(); 272 } 273 } 274 } 275 276 /**********************************************************************/ 277 /* 278 * Main network processing loop. 279 */ 280 281 int 282 NetLoop(proto_t protocol) 283 { 284 bd_t *bd = gd->bd; 285 286 #ifdef CONFIG_NET_MULTI 287 NetRestarted = 0; 288 NetDevExists = 0; 289 #endif 290 291 /* XXX problem with bss workaround */ 292 NetArpWaitPacketMAC = NULL; 293 NetArpWaitTxPacket = NULL; 294 NetArpWaitPacketIP = 0; 295 NetArpWaitReplyIP = 0; 296 NetArpWaitTxPacket = NULL; 297 NetTxPacket = NULL; 298 299 if (!NetTxPacket) { 300 int i; 301 /* 302 * Setup packet buffers, aligned correctly. 303 */ 304 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 305 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 306 for (i = 0; i < PKTBUFSRX; i++) { 307 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 308 } 309 } 310 311 if (!NetArpWaitTxPacket) { 312 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 313 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 314 NetArpWaitTxPacketSize = 0; 315 } 316 317 eth_halt(); 318 #ifdef CONFIG_NET_MULTI 319 eth_set_current(); 320 #endif 321 if (eth_init(bd) < 0) { 322 eth_halt(); 323 return(-1); 324 } 325 326 restart: 327 #ifdef CONFIG_NET_MULTI 328 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 329 #else 330 memcpy (NetOurEther, bd->bi_enetaddr, 6); 331 #endif 332 333 NetState = NETLOOP_CONTINUE; 334 335 /* 336 * Start the ball rolling with the given start function. From 337 * here on, this code is a state machine driven by received 338 * packets and timer events. 339 */ 340 341 switch (protocol) { 342 #if defined(CONFIG_CMD_NFS) 343 case NFS: 344 #endif 345 #if defined(CONFIG_CMD_PING) 346 case PING: 347 #endif 348 #if defined(CONFIG_CMD_SNTP) 349 case SNTP: 350 #endif 351 case NETCONS: 352 case TFTP: 353 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 354 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 355 NetOurSubnetMask= getenv_IPaddr ("netmask"); 356 NetOurVLAN = getenv_VLAN("vlan"); 357 NetOurNativeVLAN = getenv_VLAN("nvlan"); 358 359 switch (protocol) { 360 #if defined(CONFIG_CMD_NFS) 361 case NFS: 362 #endif 363 case NETCONS: 364 case TFTP: 365 NetServerIP = getenv_IPaddr ("serverip"); 366 break; 367 #if defined(CONFIG_CMD_PING) 368 case PING: 369 /* nothing */ 370 break; 371 #endif 372 #if defined(CONFIG_CMD_SNTP) 373 case SNTP: 374 /* nothing */ 375 break; 376 #endif 377 default: 378 break; 379 } 380 381 break; 382 case BOOTP: 383 case RARP: 384 /* 385 * initialize our IP addr to 0 in order to accept ANY 386 * IP addr assigned to us by the BOOTP / RARP server 387 */ 388 NetOurIP = 0; 389 NetServerIP = getenv_IPaddr ("serverip"); 390 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 391 NetOurNativeVLAN = getenv_VLAN("nvlan"); 392 case CDP: 393 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 394 NetOurNativeVLAN = getenv_VLAN("nvlan"); 395 break; 396 default: 397 break; 398 } 399 400 switch (net_check_prereq (protocol)) { 401 case 1: 402 /* network not configured */ 403 eth_halt(); 404 return (-1); 405 406 #ifdef CONFIG_NET_MULTI 407 case 2: 408 /* network device not configured */ 409 break; 410 #endif /* CONFIG_NET_MULTI */ 411 412 case 0: 413 #ifdef CONFIG_NET_MULTI 414 NetDevExists = 1; 415 #endif 416 switch (protocol) { 417 case TFTP: 418 /* always use ARP to get server ethernet address */ 419 TftpStart(); 420 break; 421 422 #if defined(CONFIG_CMD_DHCP) 423 case DHCP: 424 /* Start with a clean slate... */ 425 BootpTry = 0; 426 NetOurIP = 0; 427 NetServerIP = getenv_IPaddr ("serverip"); 428 DhcpRequest(); /* Basically same as BOOTP */ 429 break; 430 #endif 431 432 case BOOTP: 433 BootpTry = 0; 434 BootpRequest (); 435 break; 436 437 case RARP: 438 RarpTry = 0; 439 RarpRequest (); 440 break; 441 #if defined(CONFIG_CMD_PING) 442 case PING: 443 PingStart(); 444 break; 445 #endif 446 #if defined(CONFIG_CMD_NFS) 447 case NFS: 448 NfsStart(); 449 break; 450 #endif 451 #if defined(CONFIG_CMD_CDP) 452 case CDP: 453 CDPStart(); 454 break; 455 #endif 456 #ifdef CONFIG_NETCONSOLE 457 case NETCONS: 458 NcStart(); 459 break; 460 #endif 461 #if defined(CONFIG_CMD_SNTP) 462 case SNTP: 463 SntpStart(); 464 break; 465 #endif 466 default: 467 break; 468 } 469 470 NetBootFileXferSize = 0; 471 break; 472 } 473 474 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 475 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 476 /* 477 * Echo the inverted link state to the fault LED. 478 */ 479 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { 480 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 481 } else { 482 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 483 } 484 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 485 #endif /* CONFIG_MII, ... */ 486 487 /* 488 * Main packet reception loop. Loop receiving packets until 489 * someone sets `NetState' to a state that terminates. 490 */ 491 for (;;) { 492 WATCHDOG_RESET(); 493 #ifdef CONFIG_SHOW_ACTIVITY 494 { 495 extern void show_activity(int arg); 496 show_activity(1); 497 } 498 #endif 499 /* 500 * Check the ethernet for a new packet. The ethernet 501 * receive routine will process it. 502 */ 503 eth_rx(); 504 505 /* 506 * Abort if ctrl-c was pressed. 507 */ 508 if (ctrlc()) { 509 eth_halt(); 510 puts ("\nAbort\n"); 511 return (-1); 512 } 513 514 ArpTimeoutCheck(); 515 516 /* 517 * Check for a timeout, and run the timeout handler 518 * if we have one. 519 */ 520 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 521 thand_f *x; 522 523 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 524 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 525 defined(CONFIG_STATUS_LED) && \ 526 defined(STATUS_LED_RED) 527 /* 528 * Echo the inverted link state to the fault LED. 529 */ 530 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { 531 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 532 } else { 533 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 534 } 535 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 536 #endif /* CONFIG_MII, ... */ 537 x = timeHandler; 538 timeHandler = (thand_f *)0; 539 (*x)(); 540 } 541 542 543 switch (NetState) { 544 545 case NETLOOP_RESTART: 546 #ifdef CONFIG_NET_MULTI 547 NetRestarted = 1; 548 #endif 549 goto restart; 550 551 case NETLOOP_SUCCESS: 552 if (NetBootFileXferSize > 0) { 553 char buf[20]; 554 printf("Bytes transferred = %ld (%lx hex)\n", 555 NetBootFileXferSize, 556 NetBootFileXferSize); 557 sprintf(buf, "%lX", NetBootFileXferSize); 558 setenv("filesize", buf); 559 560 sprintf(buf, "%lX", (unsigned long)load_addr); 561 setenv("fileaddr", buf); 562 } 563 eth_halt(); 564 return NetBootFileXferSize; 565 566 case NETLOOP_FAIL: 567 return (-1); 568 } 569 } 570 } 571 572 /**********************************************************************/ 573 574 static void 575 startAgainTimeout(void) 576 { 577 NetState = NETLOOP_RESTART; 578 } 579 580 static void 581 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 582 { 583 /* Totally ignore the packet */ 584 } 585 586 void NetStartAgain (void) 587 { 588 char *nretry; 589 int noretry = 0, once = 0; 590 591 if ((nretry = getenv ("netretry")) != NULL) { 592 noretry = (strcmp (nretry, "no") == 0); 593 once = (strcmp (nretry, "once") == 0); 594 } 595 if (noretry) { 596 eth_halt (); 597 NetState = NETLOOP_FAIL; 598 return; 599 } 600 #ifndef CONFIG_NET_MULTI 601 NetSetTimeout (10000UL, startAgainTimeout); 602 NetSetHandler (startAgainHandler); 603 #else /* !CONFIG_NET_MULTI*/ 604 eth_halt (); 605 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 606 eth_try_another (!NetRestarted); 607 #endif 608 eth_init (gd->bd); 609 if (NetRestartWrap) { 610 NetRestartWrap = 0; 611 if (NetDevExists && !once) { 612 NetSetTimeout (10000UL, startAgainTimeout); 613 NetSetHandler (startAgainHandler); 614 } else { 615 NetState = NETLOOP_FAIL; 616 } 617 } else { 618 NetState = NETLOOP_RESTART; 619 } 620 #endif /* CONFIG_NET_MULTI */ 621 } 622 623 /**********************************************************************/ 624 /* 625 * Miscelaneous bits. 626 */ 627 628 void 629 NetSetHandler(rxhand_f * f) 630 { 631 packetHandler = f; 632 } 633 634 635 void 636 NetSetTimeout(ulong iv, thand_f * f) 637 { 638 if (iv == 0) { 639 timeHandler = (thand_f *)0; 640 } else { 641 timeHandler = f; 642 timeStart = get_timer(0); 643 timeDelta = iv; 644 } 645 } 646 647 648 void 649 NetSendPacket(volatile uchar * pkt, int len) 650 { 651 (void) eth_send(pkt, len); 652 } 653 654 int 655 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 656 { 657 uchar *pkt; 658 659 /* convert to new style broadcast */ 660 if (dest == 0) 661 dest = 0xFFFFFFFF; 662 663 /* if broadcast, make the ether address a broadcast and don't do ARP */ 664 if (dest == 0xFFFFFFFF) 665 ether = NetBcastAddr; 666 667 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 668 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 669 670 #ifdef ET_DEBUG 671 printf("sending ARP for %08lx\n", dest); 672 #endif 673 NetArpWaitPacketIP = dest; 674 NetArpWaitPacketMAC = ether; 675 676 pkt = NetArpWaitTxPacket; 677 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 678 679 NetSetIP (pkt, dest, dport, sport, len); 680 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 681 682 /* size of the waiting packet */ 683 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 684 685 /* and do the ARP request */ 686 NetArpWaitTry = 1; 687 NetArpWaitTimerStart = get_timer(0); 688 ArpRequest(); 689 return 1; /* waiting */ 690 } 691 692 #ifdef ET_DEBUG 693 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", 694 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 695 #endif 696 697 pkt = (uchar *)NetTxPacket; 698 pkt += NetSetEther (pkt, ether, PROT_IP); 699 NetSetIP (pkt, dest, dport, sport, len); 700 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 701 702 return 0; /* transmitted */ 703 } 704 705 #if defined(CONFIG_CMD_PING) 706 static ushort PingSeqNo; 707 708 int PingSend(void) 709 { 710 static uchar mac[6]; 711 volatile IP_t *ip; 712 volatile ushort *s; 713 uchar *pkt; 714 715 /* XXX always send arp request */ 716 717 memcpy(mac, NetEtherNullAddr, 6); 718 719 #ifdef ET_DEBUG 720 printf("sending ARP for %08lx\n", NetPingIP); 721 #endif 722 723 NetArpWaitPacketIP = NetPingIP; 724 NetArpWaitPacketMAC = mac; 725 726 pkt = NetArpWaitTxPacket; 727 pkt += NetSetEther(pkt, mac, PROT_IP); 728 729 ip = (volatile IP_t *)pkt; 730 731 /* 732 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 733 */ 734 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 735 ip->ip_tos = 0; 736 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 737 ip->ip_id = htons(NetIPID++); 738 ip->ip_off = htons(0x4000); /* No fragmentation */ 739 ip->ip_ttl = 255; 740 ip->ip_p = 0x01; /* ICMP */ 741 ip->ip_sum = 0; 742 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 743 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 744 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 745 746 s = &ip->udp_src; /* XXX ICMP starts here */ 747 s[0] = htons(0x0800); /* echo-request, code */ 748 s[1] = 0; /* checksum */ 749 s[2] = 0; /* identifier */ 750 s[3] = htons(PingSeqNo++); /* sequence number */ 751 s[1] = ~NetCksum((uchar *)s, 8/2); 752 753 /* size of the waiting packet */ 754 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 755 756 /* and do the ARP request */ 757 NetArpWaitTry = 1; 758 NetArpWaitTimerStart = get_timer(0); 759 ArpRequest(); 760 return 1; /* waiting */ 761 } 762 763 static void 764 PingTimeout (void) 765 { 766 eth_halt(); 767 NetState = NETLOOP_FAIL; /* we did not get the reply */ 768 } 769 770 static void 771 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 772 { 773 IPaddr_t tmp; 774 volatile IP_t *ip = (volatile IP_t *)pkt; 775 776 tmp = NetReadIP((void *)&ip->ip_src); 777 if (tmp != NetPingIP) 778 return; 779 780 NetState = NETLOOP_SUCCESS; 781 } 782 783 static void PingStart(void) 784 { 785 #if defined(CONFIG_NET_MULTI) 786 printf ("Using %s device\n", eth_get_name()); 787 #endif /* CONFIG_NET_MULTI */ 788 NetSetTimeout (10000UL, PingTimeout); 789 NetSetHandler (PingHandler); 790 791 PingSend(); 792 } 793 #endif 794 795 #if defined(CONFIG_CMD_CDP) 796 797 #define CDP_DEVICE_ID_TLV 0x0001 798 #define CDP_ADDRESS_TLV 0x0002 799 #define CDP_PORT_ID_TLV 0x0003 800 #define CDP_CAPABILITIES_TLV 0x0004 801 #define CDP_VERSION_TLV 0x0005 802 #define CDP_PLATFORM_TLV 0x0006 803 #define CDP_NATIVE_VLAN_TLV 0x000a 804 #define CDP_APPLIANCE_VLAN_TLV 0x000e 805 #define CDP_TRIGGER_TLV 0x000f 806 #define CDP_POWER_CONSUMPTION_TLV 0x0010 807 #define CDP_SYSNAME_TLV 0x0014 808 #define CDP_SYSOBJECT_TLV 0x0015 809 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 810 811 #define CDP_TIMEOUT 250UL /* one packet every 250ms */ 812 813 static int CDPSeq; 814 static int CDPOK; 815 816 ushort CDPNativeVLAN; 817 ushort CDPApplianceVLAN; 818 819 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 820 821 static ushort CDP_compute_csum(const uchar *buff, ushort len) 822 { 823 ushort csum; 824 int odd; 825 ulong result = 0; 826 ushort leftover; 827 ushort *p; 828 829 if (len > 0) { 830 odd = 1 & (ulong)buff; 831 if (odd) { 832 result = *buff << 8; 833 len--; 834 buff++; 835 } 836 while (len > 1) { 837 p = (ushort *)buff; 838 result += *p++; 839 buff = (uchar *)p; 840 if (result & 0x80000000) 841 result = (result & 0xFFFF) + (result >> 16); 842 len -= 2; 843 } 844 if (len) { 845 leftover = (signed short)(*(const signed char *)buff); 846 /* CISCO SUCKS big time! (and blows too): 847 * CDP uses the IP checksum algorithm with a twist; 848 * for the last byte it *sign* extends and sums. 849 */ 850 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 851 } 852 while (result >> 16) 853 result = (result & 0xFFFF) + (result >> 16); 854 855 if (odd) 856 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 857 } 858 859 /* add up 16-bit and 17-bit words for 17+c bits */ 860 result = (result & 0xffff) + (result >> 16); 861 /* add up 16-bit and 2-bit for 16+c bit */ 862 result = (result & 0xffff) + (result >> 16); 863 /* add up carry.. */ 864 result = (result & 0xffff) + (result >> 16); 865 866 /* negate */ 867 csum = ~(ushort)result; 868 869 /* run time endian detection */ 870 if (csum != htons(csum)) /* little endian */ 871 csum = htons(csum); 872 873 return csum; 874 } 875 876 int CDPSendTrigger(void) 877 { 878 volatile uchar *pkt; 879 volatile ushort *s; 880 volatile ushort *cp; 881 Ethernet_t *et; 882 int len; 883 ushort chksum; 884 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 885 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 886 char buf[32]; 887 #endif 888 889 pkt = NetTxPacket; 890 et = (Ethernet_t *)pkt; 891 892 /* NOTE: trigger sent not on any VLAN */ 893 894 /* form ethernet header */ 895 memcpy(et->et_dest, NetCDPAddr, 6); 896 memcpy(et->et_src, NetOurEther, 6); 897 898 pkt += ETHER_HDR_SIZE; 899 900 /* SNAP header */ 901 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 902 pkt += sizeof(CDP_SNAP_hdr); 903 904 /* CDP header */ 905 *pkt++ = 0x02; /* CDP version 2 */ 906 *pkt++ = 180; /* TTL */ 907 s = (volatile ushort *)pkt; 908 cp = s; 909 *s++ = htons(0); /* checksum (0 for later calculation) */ 910 911 /* CDP fields */ 912 #ifdef CONFIG_CDP_DEVICE_ID 913 *s++ = htons(CDP_DEVICE_ID_TLV); 914 *s++ = htons(CONFIG_CDP_DEVICE_ID); 915 memset(buf, 0, sizeof(buf)); 916 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 917 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 918 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 919 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 920 memcpy((uchar *)s, buf, 16); 921 s += 16 / 2; 922 #endif 923 924 #ifdef CONFIG_CDP_PORT_ID 925 *s++ = htons(CDP_PORT_ID_TLV); 926 memset(buf, 0, sizeof(buf)); 927 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 928 len = strlen(buf); 929 if (len & 1) /* make it even */ 930 len++; 931 *s++ = htons(len + 4); 932 memcpy((uchar *)s, buf, len); 933 s += len / 2; 934 #endif 935 936 #ifdef CONFIG_CDP_CAPABILITIES 937 *s++ = htons(CDP_CAPABILITIES_TLV); 938 *s++ = htons(8); 939 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 940 s += 2; 941 #endif 942 943 #ifdef CONFIG_CDP_VERSION 944 *s++ = htons(CDP_VERSION_TLV); 945 memset(buf, 0, sizeof(buf)); 946 strcpy(buf, CONFIG_CDP_VERSION); 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_PLATFORM 956 *s++ = htons(CDP_PLATFORM_TLV); 957 memset(buf, 0, sizeof(buf)); 958 strcpy(buf, CONFIG_CDP_PLATFORM); 959 len = strlen(buf); 960 if (len & 1) /* make it even */ 961 len++; 962 *s++ = htons(len + 4); 963 memcpy((uchar *)s, buf, len); 964 s += len / 2; 965 #endif 966 967 #ifdef CONFIG_CDP_TRIGGER 968 *s++ = htons(CDP_TRIGGER_TLV); 969 *s++ = htons(8); 970 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 971 s += 2; 972 #endif 973 974 #ifdef CONFIG_CDP_POWER_CONSUMPTION 975 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 976 *s++ = htons(6); 977 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 978 #endif 979 980 /* length of ethernet packet */ 981 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 982 et->et_protlen = htons(len); 983 984 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 985 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 986 if (chksum == 0) 987 chksum = 0xFFFF; 988 *cp = htons(chksum); 989 990 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 991 return 0; 992 } 993 994 static void 995 CDPTimeout (void) 996 { 997 CDPSeq++; 998 999 if (CDPSeq < 3) { 1000 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1001 CDPSendTrigger(); 1002 return; 1003 } 1004 1005 /* if not OK try again */ 1006 if (!CDPOK) 1007 NetStartAgain(); 1008 else 1009 NetState = NETLOOP_SUCCESS; 1010 } 1011 1012 static void 1013 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 1014 { 1015 /* nothing */ 1016 } 1017 1018 static void 1019 CDPHandler(const uchar * pkt, unsigned len) 1020 { 1021 const uchar *t; 1022 const ushort *ss; 1023 ushort type, tlen; 1024 uchar applid; 1025 ushort vlan, nvlan; 1026 1027 /* minimum size? */ 1028 if (len < sizeof(CDP_SNAP_hdr) + 4) 1029 goto pkt_short; 1030 1031 /* check for valid CDP SNAP header */ 1032 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1033 return; 1034 1035 pkt += sizeof(CDP_SNAP_hdr); 1036 len -= sizeof(CDP_SNAP_hdr); 1037 1038 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1039 if (pkt[0] < 0x02 || pkt[1] == 0) 1040 return; 1041 1042 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1043 if (pkt[0] != 0x02) 1044 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1045 pkt[0] & 0xff); 1046 1047 if (CDP_compute_csum(pkt, len) != 0) 1048 return; 1049 1050 pkt += 4; 1051 len -= 4; 1052 1053 vlan = htons(-1); 1054 nvlan = htons(-1); 1055 while (len > 0) { 1056 if (len < 4) 1057 goto pkt_short; 1058 1059 ss = (const ushort *)pkt; 1060 type = ntohs(ss[0]); 1061 tlen = ntohs(ss[1]); 1062 if (tlen > len) { 1063 goto pkt_short; 1064 } 1065 1066 pkt += tlen; 1067 len -= tlen; 1068 1069 ss += 2; /* point ss to the data of the TLV */ 1070 tlen -= 4; 1071 1072 switch (type) { 1073 case CDP_DEVICE_ID_TLV: 1074 break; 1075 case CDP_ADDRESS_TLV: 1076 break; 1077 case CDP_PORT_ID_TLV: 1078 break; 1079 case CDP_CAPABILITIES_TLV: 1080 break; 1081 case CDP_VERSION_TLV: 1082 break; 1083 case CDP_PLATFORM_TLV: 1084 break; 1085 case CDP_NATIVE_VLAN_TLV: 1086 nvlan = *ss; 1087 break; 1088 case CDP_APPLIANCE_VLAN_TLV: 1089 t = (const uchar *)ss; 1090 while (tlen > 0) { 1091 if (tlen < 3) 1092 goto pkt_short; 1093 1094 applid = t[0]; 1095 ss = (const ushort *)(t + 1); 1096 1097 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1098 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1099 vlan = *ss; 1100 #else 1101 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1102 #endif 1103 t += 3; tlen -= 3; 1104 } 1105 break; 1106 case CDP_TRIGGER_TLV: 1107 break; 1108 case CDP_POWER_CONSUMPTION_TLV: 1109 break; 1110 case CDP_SYSNAME_TLV: 1111 break; 1112 case CDP_SYSOBJECT_TLV: 1113 break; 1114 case CDP_MANAGEMENT_ADDRESS_TLV: 1115 break; 1116 } 1117 } 1118 1119 CDPApplianceVLAN = vlan; 1120 CDPNativeVLAN = nvlan; 1121 1122 CDPOK = 1; 1123 return; 1124 1125 pkt_short: 1126 printf("** CDP packet is too short\n"); 1127 return; 1128 } 1129 1130 static void CDPStart(void) 1131 { 1132 #if defined(CONFIG_NET_MULTI) 1133 printf ("Using %s device\n", eth_get_name()); 1134 #endif 1135 CDPSeq = 0; 1136 CDPOK = 0; 1137 1138 CDPNativeVLAN = htons(-1); 1139 CDPApplianceVLAN = htons(-1); 1140 1141 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1142 NetSetHandler (CDPDummyHandler); 1143 1144 CDPSendTrigger(); 1145 } 1146 #endif 1147 1148 1149 void 1150 NetReceive(volatile uchar * inpkt, int len) 1151 { 1152 Ethernet_t *et; 1153 IP_t *ip; 1154 ARP_t *arp; 1155 IPaddr_t tmp; 1156 int x; 1157 uchar *pkt; 1158 #if defined(CONFIG_CMD_CDP) 1159 int iscdp; 1160 #endif 1161 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1162 1163 #ifdef ET_DEBUG 1164 printf("packet received\n"); 1165 #endif 1166 1167 NetRxPkt = inpkt; 1168 NetRxPktLen = len; 1169 et = (Ethernet_t *)inpkt; 1170 1171 /* too small packet? */ 1172 if (len < ETHER_HDR_SIZE) 1173 return; 1174 1175 #ifdef CONFIG_API 1176 if (push_packet) { 1177 (*push_packet)(inpkt, len); 1178 return; 1179 } 1180 #endif 1181 1182 #if defined(CONFIG_CMD_CDP) 1183 /* keep track if packet is CDP */ 1184 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1185 #endif 1186 1187 myvlanid = ntohs(NetOurVLAN); 1188 if (myvlanid == (ushort)-1) 1189 myvlanid = VLAN_NONE; 1190 mynvlanid = ntohs(NetOurNativeVLAN); 1191 if (mynvlanid == (ushort)-1) 1192 mynvlanid = VLAN_NONE; 1193 1194 x = ntohs(et->et_protlen); 1195 1196 #ifdef ET_DEBUG 1197 printf("packet received\n"); 1198 #endif 1199 1200 if (x < 1514) { 1201 /* 1202 * Got a 802 packet. Check the other protocol field. 1203 */ 1204 x = ntohs(et->et_prot); 1205 1206 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1207 len -= E802_HDR_SIZE; 1208 1209 } else if (x != PROT_VLAN) { /* normal packet */ 1210 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1211 len -= ETHER_HDR_SIZE; 1212 1213 } else { /* VLAN packet */ 1214 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1215 1216 #ifdef ET_DEBUG 1217 printf("VLAN packet received\n"); 1218 #endif 1219 /* too small packet? */ 1220 if (len < VLAN_ETHER_HDR_SIZE) 1221 return; 1222 1223 /* if no VLAN active */ 1224 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1225 #if defined(CONFIG_CMD_CDP) 1226 && iscdp == 0 1227 #endif 1228 ) 1229 return; 1230 1231 cti = ntohs(vet->vet_tag); 1232 vlanid = cti & VLAN_IDMASK; 1233 x = ntohs(vet->vet_type); 1234 1235 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1236 len -= VLAN_ETHER_HDR_SIZE; 1237 } 1238 1239 #ifdef ET_DEBUG 1240 printf("Receive from protocol 0x%x\n", x); 1241 #endif 1242 1243 #if defined(CONFIG_CMD_CDP) 1244 if (iscdp) { 1245 CDPHandler((uchar *)ip, len); 1246 return; 1247 } 1248 #endif 1249 1250 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1251 if (vlanid == VLAN_NONE) 1252 vlanid = (mynvlanid & VLAN_IDMASK); 1253 /* not matched? */ 1254 if (vlanid != (myvlanid & VLAN_IDMASK)) 1255 return; 1256 } 1257 1258 switch (x) { 1259 1260 case PROT_ARP: 1261 /* 1262 * We have to deal with two types of ARP packets: 1263 * - REQUEST packets will be answered by sending our 1264 * IP address - if we know it. 1265 * - REPLY packates are expected only after we asked 1266 * for the TFTP server's or the gateway's ethernet 1267 * address; so if we receive such a packet, we set 1268 * the server ethernet address 1269 */ 1270 #ifdef ET_DEBUG 1271 puts ("Got ARP\n"); 1272 #endif 1273 arp = (ARP_t *)ip; 1274 if (len < ARP_HDR_SIZE) { 1275 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1276 return; 1277 } 1278 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1279 return; 1280 } 1281 if (ntohs(arp->ar_pro) != PROT_IP) { 1282 return; 1283 } 1284 if (arp->ar_hln != 6) { 1285 return; 1286 } 1287 if (arp->ar_pln != 4) { 1288 return; 1289 } 1290 1291 if (NetOurIP == 0) { 1292 return; 1293 } 1294 1295 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1296 return; 1297 } 1298 1299 switch (ntohs(arp->ar_op)) { 1300 case ARPOP_REQUEST: /* reply with our IP address */ 1301 #ifdef ET_DEBUG 1302 puts ("Got ARP REQUEST, return our IP\n"); 1303 #endif 1304 pkt = (uchar *)et; 1305 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1306 arp->ar_op = htons(ARPOP_REPLY); 1307 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1308 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1309 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1310 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1311 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1312 return; 1313 1314 case ARPOP_REPLY: /* arp reply */ 1315 /* are we waiting for a reply */ 1316 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1317 break; 1318 #ifdef ET_DEBUG 1319 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1320 arp->ar_data[0], arp->ar_data[1], 1321 arp->ar_data[2], arp->ar_data[3], 1322 arp->ar_data[4], arp->ar_data[5]); 1323 #endif 1324 1325 tmp = NetReadIP(&arp->ar_data[6]); 1326 1327 /* matched waiting packet's address */ 1328 if (tmp == NetArpWaitReplyIP) { 1329 #ifdef ET_DEBUG 1330 puts ("Got it\n"); 1331 #endif 1332 /* save address for later use */ 1333 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1334 1335 #ifdef CONFIG_NETCONSOLE 1336 (*packetHandler)(0,0,0,0); 1337 #endif 1338 /* modify header, and transmit it */ 1339 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1340 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1341 1342 /* no arp request pending now */ 1343 NetArpWaitPacketIP = 0; 1344 NetArpWaitTxPacketSize = 0; 1345 NetArpWaitPacketMAC = NULL; 1346 1347 } 1348 return; 1349 default: 1350 #ifdef ET_DEBUG 1351 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1352 #endif 1353 return; 1354 } 1355 break; 1356 1357 case PROT_RARP: 1358 #ifdef ET_DEBUG 1359 puts ("Got RARP\n"); 1360 #endif 1361 arp = (ARP_t *)ip; 1362 if (len < ARP_HDR_SIZE) { 1363 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1364 return; 1365 } 1366 1367 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1368 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1369 (ntohs(arp->ar_pro) != PROT_IP) || 1370 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1371 1372 puts ("invalid RARP header\n"); 1373 } else { 1374 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1375 if (NetServerIP == 0) 1376 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1377 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1378 1379 (*packetHandler)(0,0,0,0); 1380 } 1381 break; 1382 1383 case PROT_IP: 1384 #ifdef ET_DEBUG 1385 puts ("Got IP\n"); 1386 #endif 1387 if (len < IP_HDR_SIZE) { 1388 debug ("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE); 1389 return; 1390 } 1391 if (len < ntohs(ip->ip_len)) { 1392 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1393 return; 1394 } 1395 len = ntohs(ip->ip_len); 1396 #ifdef ET_DEBUG 1397 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1398 #endif 1399 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1400 return; 1401 } 1402 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ 1403 return; 1404 } 1405 /* can't deal with headers > 20 bytes */ 1406 if ((ip->ip_hl_v & 0x0f) > 0x05) { 1407 return; 1408 } 1409 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1410 puts ("checksum bad\n"); 1411 return; 1412 } 1413 tmp = NetReadIP(&ip->ip_dst); 1414 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1415 #ifdef CONFIG_MCAST_TFTP 1416 if (Mcast_addr != tmp) 1417 #endif 1418 return; 1419 } 1420 /* 1421 * watch for ICMP host redirects 1422 * 1423 * There is no real handler code (yet). We just watch 1424 * for ICMP host redirect messages. In case anybody 1425 * sees these messages: please contact me 1426 * (wd@denx.de), or - even better - send me the 1427 * necessary fixes :-) 1428 * 1429 * Note: in all cases where I have seen this so far 1430 * it was a problem with the router configuration, 1431 * for instance when a router was configured in the 1432 * BOOTP reply, but the TFTP server was on the same 1433 * subnet. So this is probably a warning that your 1434 * configuration might be wrong. But I'm not really 1435 * sure if there aren't any other situations. 1436 */ 1437 if (ip->ip_p == IPPROTO_ICMP) { 1438 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1439 1440 switch (icmph->type) { 1441 case ICMP_REDIRECT: 1442 if (icmph->code != ICMP_REDIR_HOST) 1443 return; 1444 puts (" ICMP Host Redirect to "); 1445 print_IPaddr(icmph->un.gateway); 1446 putc(' '); 1447 return; 1448 #if defined(CONFIG_CMD_PING) 1449 case ICMP_ECHO_REPLY: 1450 /* 1451 * IP header OK. Pass the packet to the current handler. 1452 */ 1453 /* XXX point to ip packet */ 1454 (*packetHandler)((uchar *)ip, 0, 0, 0); 1455 return; 1456 case ICMP_ECHO_REQUEST: 1457 #ifdef ET_DEBUG 1458 printf ("Got ICMP ECHO REQUEST, return %d bytes \n", 1459 ETHER_HDR_SIZE + len); 1460 #endif 1461 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1462 memcpy (&et->et_src[ 0], NetOurEther, 6); 1463 1464 ip->ip_sum = 0; 1465 ip->ip_off = 0; 1466 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1467 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1468 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1469 1470 icmph->type = ICMP_ECHO_REPLY; 1471 icmph->checksum = 0; 1472 icmph->checksum = ~NetCksum((uchar *)icmph, 1473 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1474 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1475 return; 1476 #endif 1477 default: 1478 return; 1479 } 1480 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1481 return; 1482 } 1483 1484 #ifdef CONFIG_UDP_CHECKSUM 1485 if (ip->udp_xsum != 0) { 1486 ulong xsum; 1487 ushort *sumptr; 1488 ushort sumlen; 1489 1490 xsum = ip->ip_p; 1491 xsum += (ntohs(ip->udp_len)); 1492 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1493 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1494 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1495 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1496 1497 sumlen = ntohs(ip->udp_len); 1498 sumptr = (ushort *) &(ip->udp_src); 1499 1500 while (sumlen > 1) { 1501 ushort sumdata; 1502 1503 sumdata = *sumptr++; 1504 xsum += ntohs(sumdata); 1505 sumlen -= 2; 1506 } 1507 if (sumlen > 0) { 1508 ushort sumdata; 1509 1510 sumdata = *(unsigned char *) sumptr; 1511 sumdata = (sumdata << 8) & 0xff00; 1512 xsum += sumdata; 1513 } 1514 while ((xsum >> 16) != 0) { 1515 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1516 } 1517 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1518 printf(" UDP wrong checksum %08lx %08x\n", 1519 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