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 #define ARP_TIMEOUT 5UL /* Seconds before trying ARP again */ 98 #ifndef CONFIG_NET_RETRY_COUNT 99 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 100 #else 101 # define ARP_TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) 102 #endif 103 104 #if 0 105 #define ET_DEBUG 106 #endif 107 108 /** BOOTP EXTENTIONS **/ 109 110 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 111 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 112 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 113 #if defined(CONFIG_BOOTP_DNS2) 114 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 115 #endif 116 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 117 char NetOurHostName[32]={0,}; /* Our hostname */ 118 char NetOurRootPath[64]={0,}; /* Our bootpath */ 119 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 120 121 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 122 IPaddr_t Mcast_addr; 123 #endif 124 125 /** END OF BOOTP EXTENTIONS **/ 126 127 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 128 uchar NetOurEther[6]; /* Our ethernet address */ 129 uchar NetServerEther[6] = /* Boot server enet address */ 130 { 0, 0, 0, 0, 0, 0 }; 131 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 132 IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */ 133 volatile uchar *NetRxPkt; /* Current receive packet */ 134 int NetRxPktLen; /* Current rx packet length */ 135 unsigned NetIPID; /* IP packet ID */ 136 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 137 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 138 uchar NetEtherNullAddr[6] = 139 { 0, 0, 0, 0, 0, 0 }; 140 #if defined(CONFIG_CMD_CDP) 141 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 142 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 143 #endif 144 int NetState; /* Network loop state */ 145 #ifdef CONFIG_NET_MULTI 146 int NetRestartWrap = 0; /* Tried all network devices */ 147 static int NetRestarted = 0; /* Network loop restarted */ 148 static int NetDevExists = 0; /* At least one device configured */ 149 #endif 150 151 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 152 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 153 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 154 155 char BootFile[128]; /* Boot File name */ 156 157 #if defined(CONFIG_CMD_PING) 158 IPaddr_t NetPingIP; /* the ip address to ping */ 159 160 static void PingStart(void); 161 #endif 162 163 #if defined(CONFIG_CMD_CDP) 164 static void CDPStart(void); 165 #endif 166 167 #if defined(CONFIG_CMD_SNTP) 168 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 169 int NetTimeOffset=0; /* offset time from UTC */ 170 #endif 171 172 #ifdef CONFIG_NETCONSOLE 173 void NcStart(void); 174 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 175 #endif 176 177 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 178 179 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 180 181 static rxhand_f *packetHandler; /* Current RX packet handler */ 182 static thand_f *timeHandler; /* Current timeout handler */ 183 static ulong timeStart; /* Time base value */ 184 static ulong timeDelta; /* Current timeout value */ 185 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 186 187 static int net_check_prereq (proto_t protocol); 188 189 /**********************************************************************/ 190 191 IPaddr_t NetArpWaitPacketIP; 192 IPaddr_t NetArpWaitReplyIP; 193 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 194 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 195 int NetArpWaitTxPacketSize; 196 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 197 ulong NetArpWaitTimerStart; 198 int NetArpWaitTry; 199 200 void ArpRequest (void) 201 { 202 int i; 203 volatile uchar *pkt; 204 ARP_t *arp; 205 206 #ifdef ET_DEBUG 207 printf ("ARP broadcast %d\n", NetArpWaitTry); 208 #endif 209 pkt = NetTxPacket; 210 211 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 212 213 arp = (ARP_t *) pkt; 214 215 arp->ar_hrd = htons (ARP_ETHER); 216 arp->ar_pro = htons (PROT_IP); 217 arp->ar_hln = 6; 218 arp->ar_pln = 4; 219 arp->ar_op = htons (ARPOP_REQUEST); 220 221 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 222 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 223 for (i = 10; i < 16; ++i) { 224 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 225 } 226 227 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 228 (NetOurIP & NetOurSubnetMask)) { 229 if (NetOurGatewayIP == 0) { 230 puts ("## Warning: gatewayip needed but not set\n"); 231 NetArpWaitReplyIP = NetArpWaitPacketIP; 232 } else { 233 NetArpWaitReplyIP = NetOurGatewayIP; 234 } 235 } else { 236 NetArpWaitReplyIP = NetArpWaitPacketIP; 237 } 238 239 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 240 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 241 } 242 243 void ArpTimeoutCheck(void) 244 { 245 ulong t; 246 247 if (!NetArpWaitPacketIP) 248 return; 249 250 t = get_timer(0); 251 252 /* check for arp timeout */ 253 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) { 254 NetArpWaitTry++; 255 256 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 257 puts ("\nARP Retry count exceeded; starting again\n"); 258 NetArpWaitTry = 0; 259 NetStartAgain(); 260 } else { 261 NetArpWaitTimerStart = t; 262 ArpRequest(); 263 } 264 } 265 } 266 267 /**********************************************************************/ 268 /* 269 * Main network processing loop. 270 */ 271 272 int 273 NetLoop(proto_t protocol) 274 { 275 bd_t *bd = gd->bd; 276 277 #ifdef CONFIG_NET_MULTI 278 NetRestarted = 0; 279 NetDevExists = 0; 280 #endif 281 282 /* XXX problem with bss workaround */ 283 NetArpWaitPacketMAC = NULL; 284 NetArpWaitTxPacket = NULL; 285 NetArpWaitPacketIP = 0; 286 NetArpWaitReplyIP = 0; 287 NetArpWaitTxPacket = NULL; 288 NetTxPacket = NULL; 289 290 if (!NetTxPacket) { 291 int i; 292 /* 293 * Setup packet buffers, aligned correctly. 294 */ 295 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 296 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 297 for (i = 0; i < PKTBUFSRX; i++) { 298 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 299 } 300 } 301 302 if (!NetArpWaitTxPacket) { 303 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 304 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 305 NetArpWaitTxPacketSize = 0; 306 } 307 308 eth_halt(); 309 #ifdef CONFIG_NET_MULTI 310 eth_set_current(); 311 #endif 312 if (eth_init(bd) < 0) { 313 eth_halt(); 314 return(-1); 315 } 316 317 restart: 318 #ifdef CONFIG_NET_MULTI 319 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 320 #else 321 memcpy (NetOurEther, bd->bi_enetaddr, 6); 322 #endif 323 324 NetState = NETLOOP_CONTINUE; 325 326 /* 327 * Start the ball rolling with the given start function. From 328 * here on, this code is a state machine driven by received 329 * packets and timer events. 330 */ 331 332 switch (protocol) { 333 #if defined(CONFIG_CMD_NFS) 334 case NFS: 335 #endif 336 #if defined(CONFIG_CMD_PING) 337 case PING: 338 #endif 339 #if defined(CONFIG_CMD_SNTP) 340 case SNTP: 341 #endif 342 case NETCONS: 343 case TFTP: 344 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 345 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 346 NetOurSubnetMask= getenv_IPaddr ("netmask"); 347 NetOurVLAN = getenv_VLAN("vlan"); 348 NetOurNativeVLAN = getenv_VLAN("nvlan"); 349 350 switch (protocol) { 351 #if defined(CONFIG_CMD_NFS) 352 case NFS: 353 #endif 354 case NETCONS: 355 case TFTP: 356 NetServerIP = getenv_IPaddr ("serverip"); 357 break; 358 #if defined(CONFIG_CMD_PING) 359 case PING: 360 /* nothing */ 361 break; 362 #endif 363 #if defined(CONFIG_CMD_SNTP) 364 case SNTP: 365 /* nothing */ 366 break; 367 #endif 368 default: 369 break; 370 } 371 372 break; 373 case BOOTP: 374 case RARP: 375 /* 376 * initialize our IP addr to 0 in order to accept ANY 377 * IP addr assigned to us by the BOOTP / RARP server 378 */ 379 NetOurIP = 0; 380 NetServerIP = getenv_IPaddr ("serverip"); 381 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 382 NetOurNativeVLAN = getenv_VLAN("nvlan"); 383 case CDP: 384 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 385 NetOurNativeVLAN = getenv_VLAN("nvlan"); 386 break; 387 default: 388 break; 389 } 390 391 switch (net_check_prereq (protocol)) { 392 case 1: 393 /* network not configured */ 394 eth_halt(); 395 return (-1); 396 397 #ifdef CONFIG_NET_MULTI 398 case 2: 399 /* network device not configured */ 400 break; 401 #endif /* CONFIG_NET_MULTI */ 402 403 case 0: 404 #ifdef CONFIG_NET_MULTI 405 NetDevExists = 1; 406 #endif 407 switch (protocol) { 408 case TFTP: 409 /* always use ARP to get server ethernet address */ 410 TftpStart(); 411 break; 412 413 #if defined(CONFIG_CMD_DHCP) 414 case DHCP: 415 /* Start with a clean slate... */ 416 BootpTry = 0; 417 NetOurIP = 0; 418 NetServerIP = getenv_IPaddr ("serverip"); 419 DhcpRequest(); /* Basically same as BOOTP */ 420 break; 421 #endif 422 423 case BOOTP: 424 BootpTry = 0; 425 BootpRequest (); 426 break; 427 428 case RARP: 429 RarpTry = 0; 430 RarpRequest (); 431 break; 432 #if defined(CONFIG_CMD_PING) 433 case PING: 434 PingStart(); 435 break; 436 #endif 437 #if defined(CONFIG_CMD_NFS) 438 case NFS: 439 NfsStart(); 440 break; 441 #endif 442 #if defined(CONFIG_CMD_CDP) 443 case CDP: 444 CDPStart(); 445 break; 446 #endif 447 #ifdef CONFIG_NETCONSOLE 448 case NETCONS: 449 NcStart(); 450 break; 451 #endif 452 #if defined(CONFIG_CMD_SNTP) 453 case SNTP: 454 SntpStart(); 455 break; 456 #endif 457 default: 458 break; 459 } 460 461 NetBootFileXferSize = 0; 462 break; 463 } 464 465 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 466 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 467 /* 468 * Echo the inverted link state to the fault LED. 469 */ 470 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) { 471 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 472 } else { 473 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 474 } 475 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 476 #endif /* CONFIG_MII, ... */ 477 478 /* 479 * Main packet reception loop. Loop receiving packets until 480 * someone sets `NetState' to a state that terminates. 481 */ 482 for (;;) { 483 WATCHDOG_RESET(); 484 #ifdef CONFIG_SHOW_ACTIVITY 485 { 486 extern void show_activity(int arg); 487 show_activity(1); 488 } 489 #endif 490 /* 491 * Check the ethernet for a new packet. The ethernet 492 * receive routine will process it. 493 */ 494 eth_rx(); 495 496 /* 497 * Abort if ctrl-c was pressed. 498 */ 499 if (ctrlc()) { 500 eth_halt(); 501 puts ("\nAbort\n"); 502 return (-1); 503 } 504 505 ArpTimeoutCheck(); 506 507 /* 508 * Check for a timeout, and run the timeout handler 509 * if we have one. 510 */ 511 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 512 thand_f *x; 513 514 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 515 # if defined(CFG_FAULT_ECHO_LINK_DOWN) && \ 516 defined(CONFIG_STATUS_LED) && \ 517 defined(STATUS_LED_RED) 518 /* 519 * Echo the inverted link state to the fault LED. 520 */ 521 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) { 522 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 523 } else { 524 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 525 } 526 # endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 527 #endif /* CONFIG_MII, ... */ 528 x = timeHandler; 529 timeHandler = (thand_f *)0; 530 (*x)(); 531 } 532 533 534 switch (NetState) { 535 536 case NETLOOP_RESTART: 537 #ifdef CONFIG_NET_MULTI 538 NetRestarted = 1; 539 #endif 540 goto restart; 541 542 case NETLOOP_SUCCESS: 543 if (NetBootFileXferSize > 0) { 544 char buf[20]; 545 printf("Bytes transferred = %ld (%lx hex)\n", 546 NetBootFileXferSize, 547 NetBootFileXferSize); 548 sprintf(buf, "%lX", NetBootFileXferSize); 549 setenv("filesize", buf); 550 551 sprintf(buf, "%lX", (unsigned long)load_addr); 552 setenv("fileaddr", buf); 553 } 554 eth_halt(); 555 return NetBootFileXferSize; 556 557 case NETLOOP_FAIL: 558 return (-1); 559 } 560 } 561 } 562 563 /**********************************************************************/ 564 565 static void 566 startAgainTimeout(void) 567 { 568 NetState = NETLOOP_RESTART; 569 } 570 571 static void 572 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 573 { 574 /* Totally ignore the packet */ 575 } 576 577 void NetStartAgain (void) 578 { 579 char *nretry; 580 int noretry = 0, once = 0; 581 582 if ((nretry = getenv ("netretry")) != NULL) { 583 noretry = (strcmp (nretry, "no") == 0); 584 once = (strcmp (nretry, "once") == 0); 585 } 586 if (noretry) { 587 eth_halt (); 588 NetState = NETLOOP_FAIL; 589 return; 590 } 591 #ifndef CONFIG_NET_MULTI 592 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout); 593 NetSetHandler (startAgainHandler); 594 #else /* !CONFIG_NET_MULTI*/ 595 eth_halt (); 596 eth_try_another (!NetRestarted); 597 eth_init (gd->bd); 598 if (NetRestartWrap) { 599 NetRestartWrap = 0; 600 if (NetDevExists && !once) { 601 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout); 602 NetSetHandler (startAgainHandler); 603 } else { 604 NetState = NETLOOP_FAIL; 605 } 606 } else { 607 NetState = NETLOOP_RESTART; 608 } 609 #endif /* CONFIG_NET_MULTI */ 610 } 611 612 /**********************************************************************/ 613 /* 614 * Miscelaneous bits. 615 */ 616 617 void 618 NetSetHandler(rxhand_f * f) 619 { 620 packetHandler = f; 621 } 622 623 624 void 625 NetSetTimeout(ulong iv, thand_f * f) 626 { 627 if (iv == 0) { 628 timeHandler = (thand_f *)0; 629 } else { 630 timeHandler = f; 631 timeStart = get_timer(0); 632 timeDelta = iv; 633 } 634 } 635 636 637 void 638 NetSendPacket(volatile uchar * pkt, int len) 639 { 640 (void) eth_send(pkt, len); 641 } 642 643 int 644 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 645 { 646 uchar *pkt; 647 648 /* convert to new style broadcast */ 649 if (dest == 0) 650 dest = 0xFFFFFFFF; 651 652 /* if broadcast, make the ether address a broadcast and don't do ARP */ 653 if (dest == 0xFFFFFFFF) 654 ether = NetBcastAddr; 655 656 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 657 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 658 659 #ifdef ET_DEBUG 660 printf("sending ARP for %08lx\n", dest); 661 #endif 662 NetArpWaitPacketIP = dest; 663 NetArpWaitPacketMAC = ether; 664 665 pkt = NetArpWaitTxPacket; 666 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 667 668 NetSetIP (pkt, dest, dport, sport, len); 669 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 670 671 /* size of the waiting packet */ 672 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 673 674 /* and do the ARP request */ 675 NetArpWaitTry = 1; 676 NetArpWaitTimerStart = get_timer(0); 677 ArpRequest(); 678 return 1; /* waiting */ 679 } 680 681 #ifdef ET_DEBUG 682 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", 683 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 684 #endif 685 686 pkt = (uchar *)NetTxPacket; 687 pkt += NetSetEther (pkt, ether, PROT_IP); 688 NetSetIP (pkt, dest, dport, sport, len); 689 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 690 691 return 0; /* transmitted */ 692 } 693 694 #if defined(CONFIG_CMD_PING) 695 static ushort PingSeqNo; 696 697 int PingSend(void) 698 { 699 static uchar mac[6]; 700 volatile IP_t *ip; 701 volatile ushort *s; 702 uchar *pkt; 703 704 /* XXX always send arp request */ 705 706 memcpy(mac, NetEtherNullAddr, 6); 707 708 #ifdef ET_DEBUG 709 printf("sending ARP for %08lx\n", NetPingIP); 710 #endif 711 712 NetArpWaitPacketIP = NetPingIP; 713 NetArpWaitPacketMAC = mac; 714 715 pkt = NetArpWaitTxPacket; 716 pkt += NetSetEther(pkt, mac, PROT_IP); 717 718 ip = (volatile IP_t *)pkt; 719 720 /* 721 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 722 */ 723 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 724 ip->ip_tos = 0; 725 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 726 ip->ip_id = htons(NetIPID++); 727 ip->ip_off = htons(0x4000); /* No fragmentation */ 728 ip->ip_ttl = 255; 729 ip->ip_p = 0x01; /* ICMP */ 730 ip->ip_sum = 0; 731 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 732 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 733 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 734 735 s = &ip->udp_src; /* XXX ICMP starts here */ 736 s[0] = htons(0x0800); /* echo-request, code */ 737 s[1] = 0; /* checksum */ 738 s[2] = 0; /* identifier */ 739 s[3] = htons(PingSeqNo++); /* sequence number */ 740 s[1] = ~NetCksum((uchar *)s, 8/2); 741 742 /* size of the waiting packet */ 743 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 744 745 /* and do the ARP request */ 746 NetArpWaitTry = 1; 747 NetArpWaitTimerStart = get_timer(0); 748 ArpRequest(); 749 return 1; /* waiting */ 750 } 751 752 static void 753 PingTimeout (void) 754 { 755 eth_halt(); 756 NetState = NETLOOP_FAIL; /* we did not get the reply */ 757 } 758 759 static void 760 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 761 { 762 IPaddr_t tmp; 763 volatile IP_t *ip = (volatile IP_t *)pkt; 764 765 tmp = NetReadIP((void *)&ip->ip_src); 766 if (tmp != NetPingIP) 767 return; 768 769 NetState = NETLOOP_SUCCESS; 770 } 771 772 static void PingStart(void) 773 { 774 #if defined(CONFIG_NET_MULTI) 775 printf ("Using %s device\n", eth_get_name()); 776 #endif /* CONFIG_NET_MULTI */ 777 NetSetTimeout (10UL * CFG_HZ, PingTimeout); 778 NetSetHandler (PingHandler); 779 780 PingSend(); 781 } 782 #endif 783 784 #if defined(CONFIG_CMD_CDP) 785 786 #define CDP_DEVICE_ID_TLV 0x0001 787 #define CDP_ADDRESS_TLV 0x0002 788 #define CDP_PORT_ID_TLV 0x0003 789 #define CDP_CAPABILITIES_TLV 0x0004 790 #define CDP_VERSION_TLV 0x0005 791 #define CDP_PLATFORM_TLV 0x0006 792 #define CDP_NATIVE_VLAN_TLV 0x000a 793 #define CDP_APPLIANCE_VLAN_TLV 0x000e 794 #define CDP_TRIGGER_TLV 0x000f 795 #define CDP_POWER_CONSUMPTION_TLV 0x0010 796 #define CDP_SYSNAME_TLV 0x0014 797 #define CDP_SYSOBJECT_TLV 0x0015 798 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 799 800 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */ 801 802 static int CDPSeq; 803 static int CDPOK; 804 805 ushort CDPNativeVLAN; 806 ushort CDPApplianceVLAN; 807 808 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 809 810 static ushort CDP_compute_csum(const uchar *buff, ushort len) 811 { 812 ushort csum; 813 int odd; 814 ulong result = 0; 815 ushort leftover; 816 ushort *p; 817 818 if (len > 0) { 819 odd = 1 & (ulong)buff; 820 if (odd) { 821 result = *buff << 8; 822 len--; 823 buff++; 824 } 825 while (len > 1) { 826 p = (ushort *)buff; 827 result += *p++; 828 buff = (uchar *)p; 829 if (result & 0x80000000) 830 result = (result & 0xFFFF) + (result >> 16); 831 len -= 2; 832 } 833 if (len) { 834 leftover = (signed short)(*(const signed char *)buff); 835 /* CISCO SUCKS big time! (and blows too): 836 * CDP uses the IP checksum algorithm with a twist; 837 * for the last byte it *sign* extends and sums. 838 */ 839 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 840 } 841 while (result >> 16) 842 result = (result & 0xFFFF) + (result >> 16); 843 844 if (odd) 845 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 846 } 847 848 /* add up 16-bit and 17-bit words for 17+c bits */ 849 result = (result & 0xffff) + (result >> 16); 850 /* add up 16-bit and 2-bit for 16+c bit */ 851 result = (result & 0xffff) + (result >> 16); 852 /* add up carry.. */ 853 result = (result & 0xffff) + (result >> 16); 854 855 /* negate */ 856 csum = ~(ushort)result; 857 858 /* run time endian detection */ 859 if (csum != htons(csum)) /* little endian */ 860 csum = htons(csum); 861 862 return csum; 863 } 864 865 int CDPSendTrigger(void) 866 { 867 volatile uchar *pkt; 868 volatile ushort *s; 869 volatile ushort *cp; 870 Ethernet_t *et; 871 int len; 872 ushort chksum; 873 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 874 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 875 char buf[32]; 876 #endif 877 878 pkt = NetTxPacket; 879 et = (Ethernet_t *)pkt; 880 881 /* NOTE: trigger sent not on any VLAN */ 882 883 /* form ethernet header */ 884 memcpy(et->et_dest, NetCDPAddr, 6); 885 memcpy(et->et_src, NetOurEther, 6); 886 887 pkt += ETHER_HDR_SIZE; 888 889 /* SNAP header */ 890 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 891 pkt += sizeof(CDP_SNAP_hdr); 892 893 /* CDP header */ 894 *pkt++ = 0x02; /* CDP version 2 */ 895 *pkt++ = 180; /* TTL */ 896 s = (volatile ushort *)pkt; 897 cp = s; 898 *s++ = htons(0); /* checksum (0 for later calculation) */ 899 900 /* CDP fields */ 901 #ifdef CONFIG_CDP_DEVICE_ID 902 *s++ = htons(CDP_DEVICE_ID_TLV); 903 *s++ = htons(CONFIG_CDP_DEVICE_ID); 904 memset(buf, 0, sizeof(buf)); 905 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 906 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 907 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 908 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 909 memcpy((uchar *)s, buf, 16); 910 s += 16 / 2; 911 #endif 912 913 #ifdef CONFIG_CDP_PORT_ID 914 *s++ = htons(CDP_PORT_ID_TLV); 915 memset(buf, 0, sizeof(buf)); 916 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 917 len = strlen(buf); 918 if (len & 1) /* make it even */ 919 len++; 920 *s++ = htons(len + 4); 921 memcpy((uchar *)s, buf, len); 922 s += len / 2; 923 #endif 924 925 #ifdef CONFIG_CDP_CAPABILITIES 926 *s++ = htons(CDP_CAPABILITIES_TLV); 927 *s++ = htons(8); 928 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 929 s += 2; 930 #endif 931 932 #ifdef CONFIG_CDP_VERSION 933 *s++ = htons(CDP_VERSION_TLV); 934 memset(buf, 0, sizeof(buf)); 935 strcpy(buf, CONFIG_CDP_VERSION); 936 len = strlen(buf); 937 if (len & 1) /* make it even */ 938 len++; 939 *s++ = htons(len + 4); 940 memcpy((uchar *)s, buf, len); 941 s += len / 2; 942 #endif 943 944 #ifdef CONFIG_CDP_PLATFORM 945 *s++ = htons(CDP_PLATFORM_TLV); 946 memset(buf, 0, sizeof(buf)); 947 strcpy(buf, CONFIG_CDP_PLATFORM); 948 len = strlen(buf); 949 if (len & 1) /* make it even */ 950 len++; 951 *s++ = htons(len + 4); 952 memcpy((uchar *)s, buf, len); 953 s += len / 2; 954 #endif 955 956 #ifdef CONFIG_CDP_TRIGGER 957 *s++ = htons(CDP_TRIGGER_TLV); 958 *s++ = htons(8); 959 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 960 s += 2; 961 #endif 962 963 #ifdef CONFIG_CDP_POWER_CONSUMPTION 964 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 965 *s++ = htons(6); 966 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 967 #endif 968 969 /* length of ethernet packet */ 970 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 971 et->et_protlen = htons(len); 972 973 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 974 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 975 if (chksum == 0) 976 chksum = 0xFFFF; 977 *cp = htons(chksum); 978 979 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 980 return 0; 981 } 982 983 static void 984 CDPTimeout (void) 985 { 986 CDPSeq++; 987 988 if (CDPSeq < 3) { 989 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 990 CDPSendTrigger(); 991 return; 992 } 993 994 /* if not OK try again */ 995 if (!CDPOK) 996 NetStartAgain(); 997 else 998 NetState = NETLOOP_SUCCESS; 999 } 1000 1001 static void 1002 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 1003 { 1004 /* nothing */ 1005 } 1006 1007 static void 1008 CDPHandler(const uchar * pkt, unsigned len) 1009 { 1010 const uchar *t; 1011 const ushort *ss; 1012 ushort type, tlen; 1013 uchar applid; 1014 ushort vlan, nvlan; 1015 1016 /* minimum size? */ 1017 if (len < sizeof(CDP_SNAP_hdr) + 4) 1018 goto pkt_short; 1019 1020 /* check for valid CDP SNAP header */ 1021 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1022 return; 1023 1024 pkt += sizeof(CDP_SNAP_hdr); 1025 len -= sizeof(CDP_SNAP_hdr); 1026 1027 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1028 if (pkt[0] < 0x02 || pkt[1] == 0) 1029 return; 1030 1031 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1032 if (pkt[0] != 0x02) 1033 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1034 pkt[0] & 0xff); 1035 1036 if (CDP_compute_csum(pkt, len) != 0) 1037 return; 1038 1039 pkt += 4; 1040 len -= 4; 1041 1042 vlan = htons(-1); 1043 nvlan = htons(-1); 1044 while (len > 0) { 1045 if (len < 4) 1046 goto pkt_short; 1047 1048 ss = (const ushort *)pkt; 1049 type = ntohs(ss[0]); 1050 tlen = ntohs(ss[1]); 1051 if (tlen > len) { 1052 goto pkt_short; 1053 } 1054 1055 pkt += tlen; 1056 len -= tlen; 1057 1058 ss += 2; /* point ss to the data of the TLV */ 1059 tlen -= 4; 1060 1061 switch (type) { 1062 case CDP_DEVICE_ID_TLV: 1063 break; 1064 case CDP_ADDRESS_TLV: 1065 break; 1066 case CDP_PORT_ID_TLV: 1067 break; 1068 case CDP_CAPABILITIES_TLV: 1069 break; 1070 case CDP_VERSION_TLV: 1071 break; 1072 case CDP_PLATFORM_TLV: 1073 break; 1074 case CDP_NATIVE_VLAN_TLV: 1075 nvlan = *ss; 1076 break; 1077 case CDP_APPLIANCE_VLAN_TLV: 1078 t = (const uchar *)ss; 1079 while (tlen > 0) { 1080 if (tlen < 3) 1081 goto pkt_short; 1082 1083 applid = t[0]; 1084 ss = (const ushort *)(t + 1); 1085 1086 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1087 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1088 vlan = *ss; 1089 #else 1090 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1091 #endif 1092 t += 3; tlen -= 3; 1093 } 1094 break; 1095 case CDP_TRIGGER_TLV: 1096 break; 1097 case CDP_POWER_CONSUMPTION_TLV: 1098 break; 1099 case CDP_SYSNAME_TLV: 1100 break; 1101 case CDP_SYSOBJECT_TLV: 1102 break; 1103 case CDP_MANAGEMENT_ADDRESS_TLV: 1104 break; 1105 } 1106 } 1107 1108 CDPApplianceVLAN = vlan; 1109 CDPNativeVLAN = nvlan; 1110 1111 CDPOK = 1; 1112 return; 1113 1114 pkt_short: 1115 printf("** CDP packet is too short\n"); 1116 return; 1117 } 1118 1119 static void CDPStart(void) 1120 { 1121 #if defined(CONFIG_NET_MULTI) 1122 printf ("Using %s device\n", eth_get_name()); 1123 #endif 1124 CDPSeq = 0; 1125 CDPOK = 0; 1126 1127 CDPNativeVLAN = htons(-1); 1128 CDPApplianceVLAN = htons(-1); 1129 1130 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1131 NetSetHandler (CDPDummyHandler); 1132 1133 CDPSendTrigger(); 1134 } 1135 #endif 1136 1137 1138 void 1139 NetReceive(volatile uchar * inpkt, int len) 1140 { 1141 Ethernet_t *et; 1142 IP_t *ip; 1143 ARP_t *arp; 1144 IPaddr_t tmp; 1145 int x; 1146 uchar *pkt; 1147 #if defined(CONFIG_CMD_CDP) 1148 int iscdp; 1149 #endif 1150 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1151 1152 #ifdef ET_DEBUG 1153 printf("packet received\n"); 1154 #endif 1155 1156 NetRxPkt = inpkt; 1157 NetRxPktLen = len; 1158 et = (Ethernet_t *)inpkt; 1159 1160 /* too small packet? */ 1161 if (len < ETHER_HDR_SIZE) 1162 return; 1163 1164 #if defined(CONFIG_CMD_CDP) 1165 /* keep track if packet is CDP */ 1166 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1167 #endif 1168 1169 myvlanid = ntohs(NetOurVLAN); 1170 if (myvlanid == (ushort)-1) 1171 myvlanid = VLAN_NONE; 1172 mynvlanid = ntohs(NetOurNativeVLAN); 1173 if (mynvlanid == (ushort)-1) 1174 mynvlanid = VLAN_NONE; 1175 1176 x = ntohs(et->et_protlen); 1177 1178 #ifdef ET_DEBUG 1179 printf("packet received\n"); 1180 #endif 1181 1182 if (x < 1514) { 1183 /* 1184 * Got a 802 packet. Check the other protocol field. 1185 */ 1186 x = ntohs(et->et_prot); 1187 1188 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1189 len -= E802_HDR_SIZE; 1190 1191 } else if (x != PROT_VLAN) { /* normal packet */ 1192 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1193 len -= ETHER_HDR_SIZE; 1194 1195 } else { /* VLAN packet */ 1196 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1197 1198 #ifdef ET_DEBUG 1199 printf("VLAN packet received\n"); 1200 #endif 1201 /* too small packet? */ 1202 if (len < VLAN_ETHER_HDR_SIZE) 1203 return; 1204 1205 /* if no VLAN active */ 1206 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1207 #if defined(CONFIG_CMD_CDP) 1208 && iscdp == 0 1209 #endif 1210 ) 1211 return; 1212 1213 cti = ntohs(vet->vet_tag); 1214 vlanid = cti & VLAN_IDMASK; 1215 x = ntohs(vet->vet_type); 1216 1217 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1218 len -= VLAN_ETHER_HDR_SIZE; 1219 } 1220 1221 #ifdef ET_DEBUG 1222 printf("Receive from protocol 0x%x\n", x); 1223 #endif 1224 1225 #if defined(CONFIG_CMD_CDP) 1226 if (iscdp) { 1227 CDPHandler((uchar *)ip, len); 1228 return; 1229 } 1230 #endif 1231 1232 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1233 if (vlanid == VLAN_NONE) 1234 vlanid = (mynvlanid & VLAN_IDMASK); 1235 /* not matched? */ 1236 if (vlanid != (myvlanid & VLAN_IDMASK)) 1237 return; 1238 } 1239 1240 switch (x) { 1241 1242 case PROT_ARP: 1243 /* 1244 * We have to deal with two types of ARP packets: 1245 * - REQUEST packets will be answered by sending our 1246 * IP address - if we know it. 1247 * - REPLY packates are expected only after we asked 1248 * for the TFTP server's or the gateway's ethernet 1249 * address; so if we receive such a packet, we set 1250 * the server ethernet address 1251 */ 1252 #ifdef ET_DEBUG 1253 puts ("Got ARP\n"); 1254 #endif 1255 arp = (ARP_t *)ip; 1256 if (len < ARP_HDR_SIZE) { 1257 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1258 return; 1259 } 1260 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1261 return; 1262 } 1263 if (ntohs(arp->ar_pro) != PROT_IP) { 1264 return; 1265 } 1266 if (arp->ar_hln != 6) { 1267 return; 1268 } 1269 if (arp->ar_pln != 4) { 1270 return; 1271 } 1272 1273 if (NetOurIP == 0) { 1274 return; 1275 } 1276 1277 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1278 return; 1279 } 1280 1281 switch (ntohs(arp->ar_op)) { 1282 case ARPOP_REQUEST: /* reply with our IP address */ 1283 #ifdef ET_DEBUG 1284 puts ("Got ARP REQUEST, return our IP\n"); 1285 #endif 1286 pkt = (uchar *)et; 1287 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1288 arp->ar_op = htons(ARPOP_REPLY); 1289 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1290 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1291 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1292 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1293 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1294 return; 1295 1296 case ARPOP_REPLY: /* arp reply */ 1297 /* are we waiting for a reply */ 1298 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1299 break; 1300 #ifdef ET_DEBUG 1301 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1302 arp->ar_data[0], arp->ar_data[1], 1303 arp->ar_data[2], arp->ar_data[3], 1304 arp->ar_data[4], arp->ar_data[5]); 1305 #endif 1306 1307 tmp = NetReadIP(&arp->ar_data[6]); 1308 1309 /* matched waiting packet's address */ 1310 if (tmp == NetArpWaitReplyIP) { 1311 #ifdef ET_DEBUG 1312 puts ("Got it\n"); 1313 #endif 1314 /* save address for later use */ 1315 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1316 1317 #ifdef CONFIG_NETCONSOLE 1318 (*packetHandler)(0,0,0,0); 1319 #endif 1320 /* modify header, and transmit it */ 1321 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1322 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1323 1324 /* no arp request pending now */ 1325 NetArpWaitPacketIP = 0; 1326 NetArpWaitTxPacketSize = 0; 1327 NetArpWaitPacketMAC = NULL; 1328 1329 } 1330 return; 1331 default: 1332 #ifdef ET_DEBUG 1333 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1334 #endif 1335 return; 1336 } 1337 break; 1338 1339 case PROT_RARP: 1340 #ifdef ET_DEBUG 1341 puts ("Got RARP\n"); 1342 #endif 1343 arp = (ARP_t *)ip; 1344 if (len < ARP_HDR_SIZE) { 1345 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1346 return; 1347 } 1348 1349 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1350 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1351 (ntohs(arp->ar_pro) != PROT_IP) || 1352 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1353 1354 puts ("invalid RARP header\n"); 1355 } else { 1356 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1357 if (NetServerIP == 0) 1358 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1359 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1360 1361 (*packetHandler)(0,0,0,0); 1362 } 1363 break; 1364 1365 case PROT_IP: 1366 #ifdef ET_DEBUG 1367 puts ("Got IP\n"); 1368 #endif 1369 if (len < IP_HDR_SIZE) { 1370 debug ("len bad %d < %d\n", len, IP_HDR_SIZE); 1371 return; 1372 } 1373 if (len < ntohs(ip->ip_len)) { 1374 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1375 return; 1376 } 1377 len = ntohs(ip->ip_len); 1378 #ifdef ET_DEBUG 1379 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1380 #endif 1381 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1382 return; 1383 } 1384 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ 1385 return; 1386 } 1387 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1388 puts ("checksum bad\n"); 1389 return; 1390 } 1391 tmp = NetReadIP(&ip->ip_dst); 1392 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1393 #ifdef CONFIG_MCAST_TFTP 1394 if (Mcast_addr != tmp) 1395 #endif 1396 return; 1397 } 1398 /* 1399 * watch for ICMP host redirects 1400 * 1401 * There is no real handler code (yet). We just watch 1402 * for ICMP host redirect messages. In case anybody 1403 * sees these messages: please contact me 1404 * (wd@denx.de), or - even better - send me the 1405 * necessary fixes :-) 1406 * 1407 * Note: in all cases where I have seen this so far 1408 * it was a problem with the router configuration, 1409 * for instance when a router was configured in the 1410 * BOOTP reply, but the TFTP server was on the same 1411 * subnet. So this is probably a warning that your 1412 * configuration might be wrong. But I'm not really 1413 * sure if there aren't any other situations. 1414 */ 1415 if (ip->ip_p == IPPROTO_ICMP) { 1416 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1417 1418 switch (icmph->type) { 1419 case ICMP_REDIRECT: 1420 if (icmph->code != ICMP_REDIR_HOST) 1421 return; 1422 puts (" ICMP Host Redirect to "); 1423 print_IPaddr(icmph->un.gateway); 1424 putc(' '); 1425 return; 1426 #if defined(CONFIG_CMD_PING) 1427 case ICMP_ECHO_REPLY: 1428 /* 1429 * IP header OK. Pass the packet to the current handler. 1430 */ 1431 /* XXX point to ip packet */ 1432 (*packetHandler)((uchar *)ip, 0, 0, 0); 1433 return; 1434 case ICMP_ECHO_REQUEST: 1435 #ifdef ET_DEBUG 1436 printf ("Got ICMP ECHO REQUEST, return %d bytes \n", 1437 ETHER_HDR_SIZE + len); 1438 #endif 1439 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1440 memcpy (&et->et_src[ 0], NetOurEther, 6); 1441 1442 ip->ip_sum = 0; 1443 ip->ip_off = 0; 1444 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1445 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1446 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1447 1448 icmph->type = ICMP_ECHO_REPLY; 1449 icmph->checksum = 0; 1450 icmph->checksum = ~NetCksum((uchar *)icmph, 1451 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1452 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1453 return; 1454 #endif 1455 default: 1456 return; 1457 } 1458 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1459 return; 1460 } 1461 1462 #ifdef CONFIG_UDP_CHECKSUM 1463 if (ip->udp_xsum != 0) { 1464 ulong xsum; 1465 ushort *sumptr; 1466 ushort sumlen; 1467 1468 xsum = ip->ip_p; 1469 xsum += (ntohs(ip->udp_len)); 1470 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1471 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1472 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1473 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1474 1475 sumlen = ntohs(ip->udp_len); 1476 sumptr = (ushort *) &(ip->udp_src); 1477 1478 while (sumlen > 1) { 1479 ushort sumdata; 1480 1481 sumdata = *sumptr++; 1482 xsum += ntohs(sumdata); 1483 sumlen -= 2; 1484 } 1485 if (sumlen > 0) { 1486 ushort sumdata; 1487 1488 sumdata = *(unsigned char *) sumptr; 1489 sumdata = (sumdata << 8) & 0xff00; 1490 xsum += sumdata; 1491 } 1492 while ((xsum >> 16) != 0) { 1493 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1494 } 1495 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1496 printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum)); 1497 return; 1498 } 1499 } 1500 #endif 1501 1502 1503 #ifdef CONFIG_NETCONSOLE 1504 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1505 ntohs(ip->udp_dst), 1506 ntohs(ip->udp_src), 1507 ntohs(ip->udp_len) - 8); 1508 #endif 1509 /* 1510 * IP header OK. Pass the packet to the current handler. 1511 */ 1512 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1513 ntohs(ip->udp_dst), 1514 ntohs(ip->udp_src), 1515 ntohs(ip->udp_len) - 8); 1516 break; 1517 } 1518 } 1519 1520 1521 /**********************************************************************/ 1522 1523 static int net_check_prereq (proto_t protocol) 1524 { 1525 switch (protocol) { 1526 /* Fall through */ 1527 #if defined(CONFIG_CMD_PING) 1528 case PING: 1529 if (NetPingIP == 0) { 1530 puts ("*** ERROR: ping address not given\n"); 1531 return (1); 1532 } 1533 goto common; 1534 #endif 1535 #if defined(CONFIG_CMD_SNTP) 1536 case SNTP: 1537 if (NetNtpServerIP == 0) { 1538 puts ("*** ERROR: NTP server address not given\n"); 1539 return (1); 1540 } 1541 goto common; 1542 #endif 1543 #if defined(CONFIG_CMD_NFS) 1544 case NFS: 1545 #endif 1546 case NETCONS: 1547 case TFTP: 1548 if (NetServerIP == 0) { 1549 puts ("*** ERROR: `serverip' not set\n"); 1550 return (1); 1551 } 1552 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) 1553 common: 1554 #endif 1555 1556 if (NetOurIP == 0) { 1557 puts ("*** ERROR: `ipaddr' not set\n"); 1558 return (1); 1559 } 1560 /* Fall through */ 1561 1562 case DHCP: 1563 case RARP: 1564 case BOOTP: 1565 case CDP: 1566 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1567 #ifdef CONFIG_NET_MULTI 1568 extern int eth_get_dev_index (void); 1569 int num = eth_get_dev_index (); 1570 1571 switch (num) { 1572 case -1: 1573 puts ("*** ERROR: No ethernet found.\n"); 1574 return (1); 1575 case 0: 1576 puts ("*** ERROR: `ethaddr' not set\n"); 1577 break; 1578 default: 1579 printf ("*** ERROR: `eth%daddr' not set\n", 1580 num); 1581 break; 1582 } 1583 1584 NetStartAgain (); 1585 return (2); 1586 #else 1587 puts ("*** ERROR: `ethaddr' not set\n"); 1588 return (1); 1589 #endif 1590 } 1591 /* Fall through */ 1592 default: 1593 return (0); 1594 } 1595 return (0); /* OK */ 1596 } 1597 /**********************************************************************/ 1598 1599 int 1600 NetCksumOk(uchar * ptr, int len) 1601 { 1602 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1603 } 1604 1605 1606 unsigned 1607 NetCksum(uchar * ptr, int len) 1608 { 1609 ulong xsum; 1610 ushort *p = (ushort *)ptr; 1611 1612 xsum = 0; 1613 while (len-- > 0) 1614 xsum += *p++; 1615 xsum = (xsum & 0xffff) + (xsum >> 16); 1616 xsum = (xsum & 0xffff) + (xsum >> 16); 1617 return (xsum & 0xffff); 1618 } 1619 1620 int 1621 NetEthHdrSize(void) 1622 { 1623 ushort myvlanid; 1624 1625 myvlanid = ntohs(NetOurVLAN); 1626 if (myvlanid == (ushort)-1) 1627 myvlanid = VLAN_NONE; 1628 1629 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1630 } 1631 1632 int 1633 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1634 { 1635 Ethernet_t *et = (Ethernet_t *)xet; 1636 ushort myvlanid; 1637 1638 myvlanid = ntohs(NetOurVLAN); 1639 if (myvlanid == (ushort)-1) 1640 myvlanid = VLAN_NONE; 1641 1642 memcpy (et->et_dest, addr, 6); 1643 memcpy (et->et_src, NetOurEther, 6); 1644 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1645 et->et_protlen = htons(prot); 1646 return ETHER_HDR_SIZE; 1647 } else { 1648 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1649 1650 vet->vet_vlan_type = htons(PROT_VLAN); 1651 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1652 vet->vet_type = htons(prot); 1653 return VLAN_ETHER_HDR_SIZE; 1654 } 1655 } 1656 1657 void 1658 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1659 { 1660 volatile IP_t *ip = (IP_t *)xip; 1661 1662 /* 1663 * If the data is an odd number of bytes, zero the 1664 * byte after the last byte so that the checksum 1665 * will work. 1666 */ 1667 if (len & 1) 1668 xip[IP_HDR_SIZE + len] = 0; 1669 1670 /* 1671 * Construct an IP and UDP header. 1672 * (need to set no fragment bit - XXX) 1673 */ 1674 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1675 ip->ip_tos = 0; 1676 ip->ip_len = htons(IP_HDR_SIZE + len); 1677 ip->ip_id = htons(NetIPID++); 1678 ip->ip_off = htons(0x4000); /* No fragmentation */ 1679 ip->ip_ttl = 255; 1680 ip->ip_p = 17; /* UDP */ 1681 ip->ip_sum = 0; 1682 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1683 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1684 ip->udp_src = htons(sport); 1685 ip->udp_dst = htons(dport); 1686 ip->udp_len = htons(8 + len); 1687 ip->udp_xsum = 0; 1688 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1689 } 1690 1691 void copy_filename (char *dst, char *src, int size) 1692 { 1693 if (*src && (*src == '"')) { 1694 ++src; 1695 --size; 1696 } 1697 1698 while ((--size > 0) && *src && (*src != '"')) { 1699 *dst++ = *src++; 1700 } 1701 *dst = '\0'; 1702 } 1703 1704 #endif 1705 1706 void ip_to_string (IPaddr_t x, char *s) 1707 { 1708 x = ntohl (x); 1709 sprintf (s, "%d.%d.%d.%d", 1710 (int) ((x >> 24) & 0xff), 1711 (int) ((x >> 16) & 0xff), 1712 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1713 ); 1714 } 1715 1716 IPaddr_t string_to_ip(char *s) 1717 { 1718 IPaddr_t addr; 1719 char *e; 1720 int i; 1721 1722 if (s == NULL) 1723 return(0); 1724 1725 for (addr=0, i=0; i<4; ++i) { 1726 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1727 addr <<= 8; 1728 addr |= (val & 0xFF); 1729 if (s) { 1730 s = (*e) ? e+1 : e; 1731 } 1732 } 1733 1734 return (htonl(addr)); 1735 } 1736 1737 void VLAN_to_string(ushort x, char *s) 1738 { 1739 x = ntohs(x); 1740 1741 if (x == (ushort)-1) 1742 x = VLAN_NONE; 1743 1744 if (x == VLAN_NONE) 1745 strcpy(s, "none"); 1746 else 1747 sprintf(s, "%d", x & VLAN_IDMASK); 1748 } 1749 1750 ushort string_to_VLAN(char *s) 1751 { 1752 ushort id; 1753 1754 if (s == NULL) 1755 return htons(VLAN_NONE); 1756 1757 if (*s < '0' || *s > '9') 1758 id = VLAN_NONE; 1759 else 1760 id = (ushort)simple_strtoul(s, NULL, 10); 1761 1762 return htons(id); 1763 } 1764 1765 void print_IPaddr (IPaddr_t x) 1766 { 1767 char tmp[16]; 1768 1769 ip_to_string (x, tmp); 1770 1771 puts (tmp); 1772 } 1773 1774 IPaddr_t getenv_IPaddr (char *var) 1775 { 1776 return (string_to_ip(getenv(var))); 1777 } 1778 1779 ushort getenv_VLAN(char *var) 1780 { 1781 return (string_to_VLAN(getenv(var))); 1782 } 1783