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 #ifdef CONFIG_API 141 void (*push_packet)(volatile void *, int len) = 0; 142 #endif 143 #if defined(CONFIG_CMD_CDP) 144 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 145 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 146 #endif 147 int NetState; /* Network loop state */ 148 #ifdef CONFIG_NET_MULTI 149 int NetRestartWrap = 0; /* Tried all network devices */ 150 static int NetRestarted = 0; /* Network loop restarted */ 151 static int NetDevExists = 0; /* At least one device configured */ 152 #endif 153 154 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 155 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 156 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 157 158 char BootFile[128]; /* Boot File name */ 159 160 #if defined(CONFIG_CMD_PING) 161 IPaddr_t NetPingIP; /* the ip address to ping */ 162 163 static void PingStart(void); 164 #endif 165 166 #if defined(CONFIG_CMD_CDP) 167 static void CDPStart(void); 168 #endif 169 170 #if defined(CONFIG_CMD_SNTP) 171 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 172 int NetTimeOffset=0; /* offset time from UTC */ 173 #endif 174 175 #ifdef CONFIG_NETCONSOLE 176 void NcStart(void); 177 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 178 #endif 179 180 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 181 182 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 183 184 static rxhand_f *packetHandler; /* Current RX packet handler */ 185 static thand_f *timeHandler; /* Current timeout handler */ 186 static ulong timeStart; /* Time base value */ 187 static ulong timeDelta; /* Current timeout value */ 188 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 189 190 static int net_check_prereq (proto_t protocol); 191 192 /**********************************************************************/ 193 194 IPaddr_t NetArpWaitPacketIP; 195 IPaddr_t NetArpWaitReplyIP; 196 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 197 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 198 int NetArpWaitTxPacketSize; 199 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 200 ulong NetArpWaitTimerStart; 201 int NetArpWaitTry; 202 203 void ArpRequest (void) 204 { 205 int i; 206 volatile uchar *pkt; 207 ARP_t *arp; 208 209 #ifdef ET_DEBUG 210 printf ("ARP broadcast %d\n", NetArpWaitTry); 211 #endif 212 pkt = NetTxPacket; 213 214 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 215 216 arp = (ARP_t *) pkt; 217 218 arp->ar_hrd = htons (ARP_ETHER); 219 arp->ar_pro = htons (PROT_IP); 220 arp->ar_hln = 6; 221 arp->ar_pln = 4; 222 arp->ar_op = htons (ARPOP_REQUEST); 223 224 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 225 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 226 for (i = 10; i < 16; ++i) { 227 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 228 } 229 230 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 231 (NetOurIP & NetOurSubnetMask)) { 232 if (NetOurGatewayIP == 0) { 233 puts ("## Warning: gatewayip needed but not set\n"); 234 NetArpWaitReplyIP = NetArpWaitPacketIP; 235 } else { 236 NetArpWaitReplyIP = NetOurGatewayIP; 237 } 238 } else { 239 NetArpWaitReplyIP = NetArpWaitPacketIP; 240 } 241 242 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 243 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 244 } 245 246 void ArpTimeoutCheck(void) 247 { 248 ulong t; 249 250 if (!NetArpWaitPacketIP) 251 return; 252 253 t = get_timer(0); 254 255 /* check for arp timeout */ 256 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) { 257 NetArpWaitTry++; 258 259 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 260 puts ("\nARP Retry count exceeded; starting again\n"); 261 NetArpWaitTry = 0; 262 NetStartAgain(); 263 } else { 264 NetArpWaitTimerStart = t; 265 ArpRequest(); 266 } 267 } 268 } 269 270 /**********************************************************************/ 271 /* 272 * Main network processing loop. 273 */ 274 275 int 276 NetLoop(proto_t protocol) 277 { 278 bd_t *bd = gd->bd; 279 280 #ifdef CONFIG_NET_MULTI 281 NetRestarted = 0; 282 NetDevExists = 0; 283 #endif 284 285 /* XXX problem with bss workaround */ 286 NetArpWaitPacketMAC = NULL; 287 NetArpWaitTxPacket = NULL; 288 NetArpWaitPacketIP = 0; 289 NetArpWaitReplyIP = 0; 290 NetArpWaitTxPacket = NULL; 291 NetTxPacket = NULL; 292 293 if (!NetTxPacket) { 294 int i; 295 /* 296 * Setup packet buffers, aligned correctly. 297 */ 298 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 299 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 300 for (i = 0; i < PKTBUFSRX; i++) { 301 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 302 } 303 } 304 305 if (!NetArpWaitTxPacket) { 306 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 307 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 308 NetArpWaitTxPacketSize = 0; 309 } 310 311 eth_halt(); 312 #ifdef CONFIG_NET_MULTI 313 eth_set_current(); 314 #endif 315 if (eth_init(bd) < 0) { 316 eth_halt(); 317 return(-1); 318 } 319 320 restart: 321 #ifdef CONFIG_NET_MULTI 322 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 323 #else 324 memcpy (NetOurEther, bd->bi_enetaddr, 6); 325 #endif 326 327 NetState = NETLOOP_CONTINUE; 328 329 /* 330 * Start the ball rolling with the given start function. From 331 * here on, this code is a state machine driven by received 332 * packets and timer events. 333 */ 334 335 switch (protocol) { 336 #if defined(CONFIG_CMD_NFS) 337 case NFS: 338 #endif 339 #if defined(CONFIG_CMD_PING) 340 case PING: 341 #endif 342 #if defined(CONFIG_CMD_SNTP) 343 case SNTP: 344 #endif 345 case NETCONS: 346 case TFTP: 347 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 348 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 349 NetOurSubnetMask= getenv_IPaddr ("netmask"); 350 NetOurVLAN = getenv_VLAN("vlan"); 351 NetOurNativeVLAN = getenv_VLAN("nvlan"); 352 353 switch (protocol) { 354 #if defined(CONFIG_CMD_NFS) 355 case NFS: 356 #endif 357 case NETCONS: 358 case TFTP: 359 NetServerIP = getenv_IPaddr ("serverip"); 360 break; 361 #if defined(CONFIG_CMD_PING) 362 case PING: 363 /* nothing */ 364 break; 365 #endif 366 #if defined(CONFIG_CMD_SNTP) 367 case SNTP: 368 /* nothing */ 369 break; 370 #endif 371 default: 372 break; 373 } 374 375 break; 376 case BOOTP: 377 case RARP: 378 /* 379 * initialize our IP addr to 0 in order to accept ANY 380 * IP addr assigned to us by the BOOTP / RARP server 381 */ 382 NetOurIP = 0; 383 NetServerIP = getenv_IPaddr ("serverip"); 384 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 385 NetOurNativeVLAN = getenv_VLAN("nvlan"); 386 case CDP: 387 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 388 NetOurNativeVLAN = getenv_VLAN("nvlan"); 389 break; 390 default: 391 break; 392 } 393 394 switch (net_check_prereq (protocol)) { 395 case 1: 396 /* network not configured */ 397 eth_halt(); 398 return (-1); 399 400 #ifdef CONFIG_NET_MULTI 401 case 2: 402 /* network device not configured */ 403 break; 404 #endif /* CONFIG_NET_MULTI */ 405 406 case 0: 407 #ifdef CONFIG_NET_MULTI 408 NetDevExists = 1; 409 #endif 410 switch (protocol) { 411 case TFTP: 412 /* always use ARP to get server ethernet address */ 413 TftpStart(); 414 break; 415 416 #if defined(CONFIG_CMD_DHCP) 417 case DHCP: 418 /* Start with a clean slate... */ 419 BootpTry = 0; 420 NetOurIP = 0; 421 NetServerIP = getenv_IPaddr ("serverip"); 422 DhcpRequest(); /* Basically same as BOOTP */ 423 break; 424 #endif 425 426 case BOOTP: 427 BootpTry = 0; 428 BootpRequest (); 429 break; 430 431 case RARP: 432 RarpTry = 0; 433 RarpRequest (); 434 break; 435 #if defined(CONFIG_CMD_PING) 436 case PING: 437 PingStart(); 438 break; 439 #endif 440 #if defined(CONFIG_CMD_NFS) 441 case NFS: 442 NfsStart(); 443 break; 444 #endif 445 #if defined(CONFIG_CMD_CDP) 446 case CDP: 447 CDPStart(); 448 break; 449 #endif 450 #ifdef CONFIG_NETCONSOLE 451 case NETCONS: 452 NcStart(); 453 break; 454 #endif 455 #if defined(CONFIG_CMD_SNTP) 456 case SNTP: 457 SntpStart(); 458 break; 459 #endif 460 default: 461 break; 462 } 463 464 NetBootFileXferSize = 0; 465 break; 466 } 467 468 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 469 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 470 /* 471 * Echo the inverted link state to the fault LED. 472 */ 473 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) { 474 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 475 } else { 476 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 477 } 478 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 479 #endif /* CONFIG_MII, ... */ 480 481 /* 482 * Main packet reception loop. Loop receiving packets until 483 * someone sets `NetState' to a state that terminates. 484 */ 485 for (;;) { 486 WATCHDOG_RESET(); 487 #ifdef CONFIG_SHOW_ACTIVITY 488 { 489 extern void show_activity(int arg); 490 show_activity(1); 491 } 492 #endif 493 /* 494 * Check the ethernet for a new packet. The ethernet 495 * receive routine will process it. 496 */ 497 eth_rx(); 498 499 /* 500 * Abort if ctrl-c was pressed. 501 */ 502 if (ctrlc()) { 503 eth_halt(); 504 puts ("\nAbort\n"); 505 return (-1); 506 } 507 508 ArpTimeoutCheck(); 509 510 /* 511 * Check for a timeout, and run the timeout handler 512 * if we have one. 513 */ 514 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 515 thand_f *x; 516 517 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 518 # if defined(CFG_FAULT_ECHO_LINK_DOWN) && \ 519 defined(CONFIG_STATUS_LED) && \ 520 defined(STATUS_LED_RED) 521 /* 522 * Echo the inverted link state to the fault LED. 523 */ 524 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) { 525 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 526 } else { 527 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 528 } 529 # endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 530 #endif /* CONFIG_MII, ... */ 531 x = timeHandler; 532 timeHandler = (thand_f *)0; 533 (*x)(); 534 } 535 536 537 switch (NetState) { 538 539 case NETLOOP_RESTART: 540 #ifdef CONFIG_NET_MULTI 541 NetRestarted = 1; 542 #endif 543 goto restart; 544 545 case NETLOOP_SUCCESS: 546 if (NetBootFileXferSize > 0) { 547 char buf[20]; 548 printf("Bytes transferred = %ld (%lx hex)\n", 549 NetBootFileXferSize, 550 NetBootFileXferSize); 551 sprintf(buf, "%lX", NetBootFileXferSize); 552 setenv("filesize", buf); 553 554 sprintf(buf, "%lX", (unsigned long)load_addr); 555 setenv("fileaddr", buf); 556 } 557 eth_halt(); 558 return NetBootFileXferSize; 559 560 case NETLOOP_FAIL: 561 return (-1); 562 } 563 } 564 } 565 566 /**********************************************************************/ 567 568 static void 569 startAgainTimeout(void) 570 { 571 NetState = NETLOOP_RESTART; 572 } 573 574 static void 575 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 576 { 577 /* Totally ignore the packet */ 578 } 579 580 void NetStartAgain (void) 581 { 582 char *nretry; 583 int noretry = 0, once = 0; 584 585 if ((nretry = getenv ("netretry")) != NULL) { 586 noretry = (strcmp (nretry, "no") == 0); 587 once = (strcmp (nretry, "once") == 0); 588 } 589 if (noretry) { 590 eth_halt (); 591 NetState = NETLOOP_FAIL; 592 return; 593 } 594 #ifndef CONFIG_NET_MULTI 595 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout); 596 NetSetHandler (startAgainHandler); 597 #else /* !CONFIG_NET_MULTI*/ 598 eth_halt (); 599 eth_try_another (!NetRestarted); 600 eth_init (gd->bd); 601 if (NetRestartWrap) { 602 NetRestartWrap = 0; 603 if (NetDevExists && !once) { 604 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout); 605 NetSetHandler (startAgainHandler); 606 } else { 607 NetState = NETLOOP_FAIL; 608 } 609 } else { 610 NetState = NETLOOP_RESTART; 611 } 612 #endif /* CONFIG_NET_MULTI */ 613 } 614 615 /**********************************************************************/ 616 /* 617 * Miscelaneous bits. 618 */ 619 620 void 621 NetSetHandler(rxhand_f * f) 622 { 623 packetHandler = f; 624 } 625 626 627 void 628 NetSetTimeout(ulong iv, thand_f * f) 629 { 630 if (iv == 0) { 631 timeHandler = (thand_f *)0; 632 } else { 633 timeHandler = f; 634 timeStart = get_timer(0); 635 timeDelta = iv; 636 } 637 } 638 639 640 void 641 NetSendPacket(volatile uchar * pkt, int len) 642 { 643 (void) eth_send(pkt, len); 644 } 645 646 int 647 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 648 { 649 uchar *pkt; 650 651 /* convert to new style broadcast */ 652 if (dest == 0) 653 dest = 0xFFFFFFFF; 654 655 /* if broadcast, make the ether address a broadcast and don't do ARP */ 656 if (dest == 0xFFFFFFFF) 657 ether = NetBcastAddr; 658 659 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 660 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 661 662 #ifdef ET_DEBUG 663 printf("sending ARP for %08lx\n", dest); 664 #endif 665 NetArpWaitPacketIP = dest; 666 NetArpWaitPacketMAC = ether; 667 668 pkt = NetArpWaitTxPacket; 669 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 670 671 NetSetIP (pkt, dest, dport, sport, len); 672 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 673 674 /* size of the waiting packet */ 675 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 676 677 /* and do the ARP request */ 678 NetArpWaitTry = 1; 679 NetArpWaitTimerStart = get_timer(0); 680 ArpRequest(); 681 return 1; /* waiting */ 682 } 683 684 #ifdef ET_DEBUG 685 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", 686 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 687 #endif 688 689 pkt = (uchar *)NetTxPacket; 690 pkt += NetSetEther (pkt, ether, PROT_IP); 691 NetSetIP (pkt, dest, dport, sport, len); 692 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 693 694 return 0; /* transmitted */ 695 } 696 697 #if defined(CONFIG_CMD_PING) 698 static ushort PingSeqNo; 699 700 int PingSend(void) 701 { 702 static uchar mac[6]; 703 volatile IP_t *ip; 704 volatile ushort *s; 705 uchar *pkt; 706 707 /* XXX always send arp request */ 708 709 memcpy(mac, NetEtherNullAddr, 6); 710 711 #ifdef ET_DEBUG 712 printf("sending ARP for %08lx\n", NetPingIP); 713 #endif 714 715 NetArpWaitPacketIP = NetPingIP; 716 NetArpWaitPacketMAC = mac; 717 718 pkt = NetArpWaitTxPacket; 719 pkt += NetSetEther(pkt, mac, PROT_IP); 720 721 ip = (volatile IP_t *)pkt; 722 723 /* 724 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 725 */ 726 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 727 ip->ip_tos = 0; 728 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 729 ip->ip_id = htons(NetIPID++); 730 ip->ip_off = htons(0x4000); /* No fragmentation */ 731 ip->ip_ttl = 255; 732 ip->ip_p = 0x01; /* ICMP */ 733 ip->ip_sum = 0; 734 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 735 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 736 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 737 738 s = &ip->udp_src; /* XXX ICMP starts here */ 739 s[0] = htons(0x0800); /* echo-request, code */ 740 s[1] = 0; /* checksum */ 741 s[2] = 0; /* identifier */ 742 s[3] = htons(PingSeqNo++); /* sequence number */ 743 s[1] = ~NetCksum((uchar *)s, 8/2); 744 745 /* size of the waiting packet */ 746 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 747 748 /* and do the ARP request */ 749 NetArpWaitTry = 1; 750 NetArpWaitTimerStart = get_timer(0); 751 ArpRequest(); 752 return 1; /* waiting */ 753 } 754 755 static void 756 PingTimeout (void) 757 { 758 eth_halt(); 759 NetState = NETLOOP_FAIL; /* we did not get the reply */ 760 } 761 762 static void 763 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 764 { 765 IPaddr_t tmp; 766 volatile IP_t *ip = (volatile IP_t *)pkt; 767 768 tmp = NetReadIP((void *)&ip->ip_src); 769 if (tmp != NetPingIP) 770 return; 771 772 NetState = NETLOOP_SUCCESS; 773 } 774 775 static void PingStart(void) 776 { 777 #if defined(CONFIG_NET_MULTI) 778 printf ("Using %s device\n", eth_get_name()); 779 #endif /* CONFIG_NET_MULTI */ 780 NetSetTimeout (10UL * CFG_HZ, PingTimeout); 781 NetSetHandler (PingHandler); 782 783 PingSend(); 784 } 785 #endif 786 787 #if defined(CONFIG_CMD_CDP) 788 789 #define CDP_DEVICE_ID_TLV 0x0001 790 #define CDP_ADDRESS_TLV 0x0002 791 #define CDP_PORT_ID_TLV 0x0003 792 #define CDP_CAPABILITIES_TLV 0x0004 793 #define CDP_VERSION_TLV 0x0005 794 #define CDP_PLATFORM_TLV 0x0006 795 #define CDP_NATIVE_VLAN_TLV 0x000a 796 #define CDP_APPLIANCE_VLAN_TLV 0x000e 797 #define CDP_TRIGGER_TLV 0x000f 798 #define CDP_POWER_CONSUMPTION_TLV 0x0010 799 #define CDP_SYSNAME_TLV 0x0014 800 #define CDP_SYSOBJECT_TLV 0x0015 801 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 802 803 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */ 804 805 static int CDPSeq; 806 static int CDPOK; 807 808 ushort CDPNativeVLAN; 809 ushort CDPApplianceVLAN; 810 811 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 812 813 static ushort CDP_compute_csum(const uchar *buff, ushort len) 814 { 815 ushort csum; 816 int odd; 817 ulong result = 0; 818 ushort leftover; 819 ushort *p; 820 821 if (len > 0) { 822 odd = 1 & (ulong)buff; 823 if (odd) { 824 result = *buff << 8; 825 len--; 826 buff++; 827 } 828 while (len > 1) { 829 p = (ushort *)buff; 830 result += *p++; 831 buff = (uchar *)p; 832 if (result & 0x80000000) 833 result = (result & 0xFFFF) + (result >> 16); 834 len -= 2; 835 } 836 if (len) { 837 leftover = (signed short)(*(const signed char *)buff); 838 /* CISCO SUCKS big time! (and blows too): 839 * CDP uses the IP checksum algorithm with a twist; 840 * for the last byte it *sign* extends and sums. 841 */ 842 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 843 } 844 while (result >> 16) 845 result = (result & 0xFFFF) + (result >> 16); 846 847 if (odd) 848 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 849 } 850 851 /* add up 16-bit and 17-bit words for 17+c bits */ 852 result = (result & 0xffff) + (result >> 16); 853 /* add up 16-bit and 2-bit for 16+c bit */ 854 result = (result & 0xffff) + (result >> 16); 855 /* add up carry.. */ 856 result = (result & 0xffff) + (result >> 16); 857 858 /* negate */ 859 csum = ~(ushort)result; 860 861 /* run time endian detection */ 862 if (csum != htons(csum)) /* little endian */ 863 csum = htons(csum); 864 865 return csum; 866 } 867 868 int CDPSendTrigger(void) 869 { 870 volatile uchar *pkt; 871 volatile ushort *s; 872 volatile ushort *cp; 873 Ethernet_t *et; 874 int len; 875 ushort chksum; 876 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 877 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 878 char buf[32]; 879 #endif 880 881 pkt = NetTxPacket; 882 et = (Ethernet_t *)pkt; 883 884 /* NOTE: trigger sent not on any VLAN */ 885 886 /* form ethernet header */ 887 memcpy(et->et_dest, NetCDPAddr, 6); 888 memcpy(et->et_src, NetOurEther, 6); 889 890 pkt += ETHER_HDR_SIZE; 891 892 /* SNAP header */ 893 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 894 pkt += sizeof(CDP_SNAP_hdr); 895 896 /* CDP header */ 897 *pkt++ = 0x02; /* CDP version 2 */ 898 *pkt++ = 180; /* TTL */ 899 s = (volatile ushort *)pkt; 900 cp = s; 901 *s++ = htons(0); /* checksum (0 for later calculation) */ 902 903 /* CDP fields */ 904 #ifdef CONFIG_CDP_DEVICE_ID 905 *s++ = htons(CDP_DEVICE_ID_TLV); 906 *s++ = htons(CONFIG_CDP_DEVICE_ID); 907 memset(buf, 0, sizeof(buf)); 908 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 909 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 910 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 911 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 912 memcpy((uchar *)s, buf, 16); 913 s += 16 / 2; 914 #endif 915 916 #ifdef CONFIG_CDP_PORT_ID 917 *s++ = htons(CDP_PORT_ID_TLV); 918 memset(buf, 0, sizeof(buf)); 919 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 920 len = strlen(buf); 921 if (len & 1) /* make it even */ 922 len++; 923 *s++ = htons(len + 4); 924 memcpy((uchar *)s, buf, len); 925 s += len / 2; 926 #endif 927 928 #ifdef CONFIG_CDP_CAPABILITIES 929 *s++ = htons(CDP_CAPABILITIES_TLV); 930 *s++ = htons(8); 931 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 932 s += 2; 933 #endif 934 935 #ifdef CONFIG_CDP_VERSION 936 *s++ = htons(CDP_VERSION_TLV); 937 memset(buf, 0, sizeof(buf)); 938 strcpy(buf, CONFIG_CDP_VERSION); 939 len = strlen(buf); 940 if (len & 1) /* make it even */ 941 len++; 942 *s++ = htons(len + 4); 943 memcpy((uchar *)s, buf, len); 944 s += len / 2; 945 #endif 946 947 #ifdef CONFIG_CDP_PLATFORM 948 *s++ = htons(CDP_PLATFORM_TLV); 949 memset(buf, 0, sizeof(buf)); 950 strcpy(buf, CONFIG_CDP_PLATFORM); 951 len = strlen(buf); 952 if (len & 1) /* make it even */ 953 len++; 954 *s++ = htons(len + 4); 955 memcpy((uchar *)s, buf, len); 956 s += len / 2; 957 #endif 958 959 #ifdef CONFIG_CDP_TRIGGER 960 *s++ = htons(CDP_TRIGGER_TLV); 961 *s++ = htons(8); 962 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 963 s += 2; 964 #endif 965 966 #ifdef CONFIG_CDP_POWER_CONSUMPTION 967 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 968 *s++ = htons(6); 969 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 970 #endif 971 972 /* length of ethernet packet */ 973 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 974 et->et_protlen = htons(len); 975 976 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 977 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 978 if (chksum == 0) 979 chksum = 0xFFFF; 980 *cp = htons(chksum); 981 982 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 983 return 0; 984 } 985 986 static void 987 CDPTimeout (void) 988 { 989 CDPSeq++; 990 991 if (CDPSeq < 3) { 992 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 993 CDPSendTrigger(); 994 return; 995 } 996 997 /* if not OK try again */ 998 if (!CDPOK) 999 NetStartAgain(); 1000 else 1001 NetState = NETLOOP_SUCCESS; 1002 } 1003 1004 static void 1005 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 1006 { 1007 /* nothing */ 1008 } 1009 1010 static void 1011 CDPHandler(const uchar * pkt, unsigned len) 1012 { 1013 const uchar *t; 1014 const ushort *ss; 1015 ushort type, tlen; 1016 uchar applid; 1017 ushort vlan, nvlan; 1018 1019 /* minimum size? */ 1020 if (len < sizeof(CDP_SNAP_hdr) + 4) 1021 goto pkt_short; 1022 1023 /* check for valid CDP SNAP header */ 1024 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1025 return; 1026 1027 pkt += sizeof(CDP_SNAP_hdr); 1028 len -= sizeof(CDP_SNAP_hdr); 1029 1030 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1031 if (pkt[0] < 0x02 || pkt[1] == 0) 1032 return; 1033 1034 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1035 if (pkt[0] != 0x02) 1036 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1037 pkt[0] & 0xff); 1038 1039 if (CDP_compute_csum(pkt, len) != 0) 1040 return; 1041 1042 pkt += 4; 1043 len -= 4; 1044 1045 vlan = htons(-1); 1046 nvlan = htons(-1); 1047 while (len > 0) { 1048 if (len < 4) 1049 goto pkt_short; 1050 1051 ss = (const ushort *)pkt; 1052 type = ntohs(ss[0]); 1053 tlen = ntohs(ss[1]); 1054 if (tlen > len) { 1055 goto pkt_short; 1056 } 1057 1058 pkt += tlen; 1059 len -= tlen; 1060 1061 ss += 2; /* point ss to the data of the TLV */ 1062 tlen -= 4; 1063 1064 switch (type) { 1065 case CDP_DEVICE_ID_TLV: 1066 break; 1067 case CDP_ADDRESS_TLV: 1068 break; 1069 case CDP_PORT_ID_TLV: 1070 break; 1071 case CDP_CAPABILITIES_TLV: 1072 break; 1073 case CDP_VERSION_TLV: 1074 break; 1075 case CDP_PLATFORM_TLV: 1076 break; 1077 case CDP_NATIVE_VLAN_TLV: 1078 nvlan = *ss; 1079 break; 1080 case CDP_APPLIANCE_VLAN_TLV: 1081 t = (const uchar *)ss; 1082 while (tlen > 0) { 1083 if (tlen < 3) 1084 goto pkt_short; 1085 1086 applid = t[0]; 1087 ss = (const ushort *)(t + 1); 1088 1089 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1090 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1091 vlan = *ss; 1092 #else 1093 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1094 #endif 1095 t += 3; tlen -= 3; 1096 } 1097 break; 1098 case CDP_TRIGGER_TLV: 1099 break; 1100 case CDP_POWER_CONSUMPTION_TLV: 1101 break; 1102 case CDP_SYSNAME_TLV: 1103 break; 1104 case CDP_SYSOBJECT_TLV: 1105 break; 1106 case CDP_MANAGEMENT_ADDRESS_TLV: 1107 break; 1108 } 1109 } 1110 1111 CDPApplianceVLAN = vlan; 1112 CDPNativeVLAN = nvlan; 1113 1114 CDPOK = 1; 1115 return; 1116 1117 pkt_short: 1118 printf("** CDP packet is too short\n"); 1119 return; 1120 } 1121 1122 static void CDPStart(void) 1123 { 1124 #if defined(CONFIG_NET_MULTI) 1125 printf ("Using %s device\n", eth_get_name()); 1126 #endif 1127 CDPSeq = 0; 1128 CDPOK = 0; 1129 1130 CDPNativeVLAN = htons(-1); 1131 CDPApplianceVLAN = htons(-1); 1132 1133 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1134 NetSetHandler (CDPDummyHandler); 1135 1136 CDPSendTrigger(); 1137 } 1138 #endif 1139 1140 1141 void 1142 NetReceive(volatile uchar * inpkt, int len) 1143 { 1144 Ethernet_t *et; 1145 IP_t *ip; 1146 ARP_t *arp; 1147 IPaddr_t tmp; 1148 int x; 1149 uchar *pkt; 1150 #if defined(CONFIG_CMD_CDP) 1151 int iscdp; 1152 #endif 1153 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1154 1155 #ifdef ET_DEBUG 1156 printf("packet received\n"); 1157 #endif 1158 1159 NetRxPkt = inpkt; 1160 NetRxPktLen = len; 1161 et = (Ethernet_t *)inpkt; 1162 1163 /* too small packet? */ 1164 if (len < ETHER_HDR_SIZE) 1165 return; 1166 1167 #ifdef CONFIG_API 1168 if (push_packet) { 1169 (*push_packet)(inpkt, len); 1170 return; 1171 } 1172 #endif 1173 1174 #if defined(CONFIG_CMD_CDP) 1175 /* keep track if packet is CDP */ 1176 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1177 #endif 1178 1179 myvlanid = ntohs(NetOurVLAN); 1180 if (myvlanid == (ushort)-1) 1181 myvlanid = VLAN_NONE; 1182 mynvlanid = ntohs(NetOurNativeVLAN); 1183 if (mynvlanid == (ushort)-1) 1184 mynvlanid = VLAN_NONE; 1185 1186 x = ntohs(et->et_protlen); 1187 1188 #ifdef ET_DEBUG 1189 printf("packet received\n"); 1190 #endif 1191 1192 if (x < 1514) { 1193 /* 1194 * Got a 802 packet. Check the other protocol field. 1195 */ 1196 x = ntohs(et->et_prot); 1197 1198 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1199 len -= E802_HDR_SIZE; 1200 1201 } else if (x != PROT_VLAN) { /* normal packet */ 1202 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1203 len -= ETHER_HDR_SIZE; 1204 1205 } else { /* VLAN packet */ 1206 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1207 1208 #ifdef ET_DEBUG 1209 printf("VLAN packet received\n"); 1210 #endif 1211 /* too small packet? */ 1212 if (len < VLAN_ETHER_HDR_SIZE) 1213 return; 1214 1215 /* if no VLAN active */ 1216 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1217 #if defined(CONFIG_CMD_CDP) 1218 && iscdp == 0 1219 #endif 1220 ) 1221 return; 1222 1223 cti = ntohs(vet->vet_tag); 1224 vlanid = cti & VLAN_IDMASK; 1225 x = ntohs(vet->vet_type); 1226 1227 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1228 len -= VLAN_ETHER_HDR_SIZE; 1229 } 1230 1231 #ifdef ET_DEBUG 1232 printf("Receive from protocol 0x%x\n", x); 1233 #endif 1234 1235 #if defined(CONFIG_CMD_CDP) 1236 if (iscdp) { 1237 CDPHandler((uchar *)ip, len); 1238 return; 1239 } 1240 #endif 1241 1242 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1243 if (vlanid == VLAN_NONE) 1244 vlanid = (mynvlanid & VLAN_IDMASK); 1245 /* not matched? */ 1246 if (vlanid != (myvlanid & VLAN_IDMASK)) 1247 return; 1248 } 1249 1250 switch (x) { 1251 1252 case PROT_ARP: 1253 /* 1254 * We have to deal with two types of ARP packets: 1255 * - REQUEST packets will be answered by sending our 1256 * IP address - if we know it. 1257 * - REPLY packates are expected only after we asked 1258 * for the TFTP server's or the gateway's ethernet 1259 * address; so if we receive such a packet, we set 1260 * the server ethernet address 1261 */ 1262 #ifdef ET_DEBUG 1263 puts ("Got ARP\n"); 1264 #endif 1265 arp = (ARP_t *)ip; 1266 if (len < ARP_HDR_SIZE) { 1267 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1268 return; 1269 } 1270 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1271 return; 1272 } 1273 if (ntohs(arp->ar_pro) != PROT_IP) { 1274 return; 1275 } 1276 if (arp->ar_hln != 6) { 1277 return; 1278 } 1279 if (arp->ar_pln != 4) { 1280 return; 1281 } 1282 1283 if (NetOurIP == 0) { 1284 return; 1285 } 1286 1287 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1288 return; 1289 } 1290 1291 switch (ntohs(arp->ar_op)) { 1292 case ARPOP_REQUEST: /* reply with our IP address */ 1293 #ifdef ET_DEBUG 1294 puts ("Got ARP REQUEST, return our IP\n"); 1295 #endif 1296 pkt = (uchar *)et; 1297 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1298 arp->ar_op = htons(ARPOP_REPLY); 1299 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1300 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1301 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1302 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1303 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1304 return; 1305 1306 case ARPOP_REPLY: /* arp reply */ 1307 /* are we waiting for a reply */ 1308 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1309 break; 1310 #ifdef ET_DEBUG 1311 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1312 arp->ar_data[0], arp->ar_data[1], 1313 arp->ar_data[2], arp->ar_data[3], 1314 arp->ar_data[4], arp->ar_data[5]); 1315 #endif 1316 1317 tmp = NetReadIP(&arp->ar_data[6]); 1318 1319 /* matched waiting packet's address */ 1320 if (tmp == NetArpWaitReplyIP) { 1321 #ifdef ET_DEBUG 1322 puts ("Got it\n"); 1323 #endif 1324 /* save address for later use */ 1325 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1326 1327 #ifdef CONFIG_NETCONSOLE 1328 (*packetHandler)(0,0,0,0); 1329 #endif 1330 /* modify header, and transmit it */ 1331 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1332 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1333 1334 /* no arp request pending now */ 1335 NetArpWaitPacketIP = 0; 1336 NetArpWaitTxPacketSize = 0; 1337 NetArpWaitPacketMAC = NULL; 1338 1339 } 1340 return; 1341 default: 1342 #ifdef ET_DEBUG 1343 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1344 #endif 1345 return; 1346 } 1347 break; 1348 1349 case PROT_RARP: 1350 #ifdef ET_DEBUG 1351 puts ("Got RARP\n"); 1352 #endif 1353 arp = (ARP_t *)ip; 1354 if (len < ARP_HDR_SIZE) { 1355 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1356 return; 1357 } 1358 1359 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1360 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1361 (ntohs(arp->ar_pro) != PROT_IP) || 1362 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1363 1364 puts ("invalid RARP header\n"); 1365 } else { 1366 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1367 if (NetServerIP == 0) 1368 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1369 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1370 1371 (*packetHandler)(0,0,0,0); 1372 } 1373 break; 1374 1375 case PROT_IP: 1376 #ifdef ET_DEBUG 1377 puts ("Got IP\n"); 1378 #endif 1379 if (len < IP_HDR_SIZE) { 1380 debug ("len bad %d < %d\n", len, IP_HDR_SIZE); 1381 return; 1382 } 1383 if (len < ntohs(ip->ip_len)) { 1384 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1385 return; 1386 } 1387 len = ntohs(ip->ip_len); 1388 #ifdef ET_DEBUG 1389 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1390 #endif 1391 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1392 return; 1393 } 1394 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ 1395 return; 1396 } 1397 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1398 puts ("checksum bad\n"); 1399 return; 1400 } 1401 tmp = NetReadIP(&ip->ip_dst); 1402 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1403 #ifdef CONFIG_MCAST_TFTP 1404 if (Mcast_addr != tmp) 1405 #endif 1406 return; 1407 } 1408 /* 1409 * watch for ICMP host redirects 1410 * 1411 * There is no real handler code (yet). We just watch 1412 * for ICMP host redirect messages. In case anybody 1413 * sees these messages: please contact me 1414 * (wd@denx.de), or - even better - send me the 1415 * necessary fixes :-) 1416 * 1417 * Note: in all cases where I have seen this so far 1418 * it was a problem with the router configuration, 1419 * for instance when a router was configured in the 1420 * BOOTP reply, but the TFTP server was on the same 1421 * subnet. So this is probably a warning that your 1422 * configuration might be wrong. But I'm not really 1423 * sure if there aren't any other situations. 1424 */ 1425 if (ip->ip_p == IPPROTO_ICMP) { 1426 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1427 1428 switch (icmph->type) { 1429 case ICMP_REDIRECT: 1430 if (icmph->code != ICMP_REDIR_HOST) 1431 return; 1432 puts (" ICMP Host Redirect to "); 1433 print_IPaddr(icmph->un.gateway); 1434 putc(' '); 1435 return; 1436 #if defined(CONFIG_CMD_PING) 1437 case ICMP_ECHO_REPLY: 1438 /* 1439 * IP header OK. Pass the packet to the current handler. 1440 */ 1441 /* XXX point to ip packet */ 1442 (*packetHandler)((uchar *)ip, 0, 0, 0); 1443 return; 1444 case ICMP_ECHO_REQUEST: 1445 #ifdef ET_DEBUG 1446 printf ("Got ICMP ECHO REQUEST, return %d bytes \n", 1447 ETHER_HDR_SIZE + len); 1448 #endif 1449 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1450 memcpy (&et->et_src[ 0], NetOurEther, 6); 1451 1452 ip->ip_sum = 0; 1453 ip->ip_off = 0; 1454 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1455 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1456 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1457 1458 icmph->type = ICMP_ECHO_REPLY; 1459 icmph->checksum = 0; 1460 icmph->checksum = ~NetCksum((uchar *)icmph, 1461 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1462 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1463 return; 1464 #endif 1465 default: 1466 return; 1467 } 1468 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1469 return; 1470 } 1471 1472 #ifdef CONFIG_UDP_CHECKSUM 1473 if (ip->udp_xsum != 0) { 1474 ulong xsum; 1475 ushort *sumptr; 1476 ushort sumlen; 1477 1478 xsum = ip->ip_p; 1479 xsum += (ntohs(ip->udp_len)); 1480 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1481 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1482 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1483 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1484 1485 sumlen = ntohs(ip->udp_len); 1486 sumptr = (ushort *) &(ip->udp_src); 1487 1488 while (sumlen > 1) { 1489 ushort sumdata; 1490 1491 sumdata = *sumptr++; 1492 xsum += ntohs(sumdata); 1493 sumlen -= 2; 1494 } 1495 if (sumlen > 0) { 1496 ushort sumdata; 1497 1498 sumdata = *(unsigned char *) sumptr; 1499 sumdata = (sumdata << 8) & 0xff00; 1500 xsum += sumdata; 1501 } 1502 while ((xsum >> 16) != 0) { 1503 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1504 } 1505 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1506 printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum)); 1507 return; 1508 } 1509 } 1510 #endif 1511 1512 1513 #ifdef CONFIG_NETCONSOLE 1514 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1515 ntohs(ip->udp_dst), 1516 ntohs(ip->udp_src), 1517 ntohs(ip->udp_len) - 8); 1518 #endif 1519 /* 1520 * IP header OK. Pass the packet to the current handler. 1521 */ 1522 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1523 ntohs(ip->udp_dst), 1524 ntohs(ip->udp_src), 1525 ntohs(ip->udp_len) - 8); 1526 break; 1527 } 1528 } 1529 1530 1531 /**********************************************************************/ 1532 1533 static int net_check_prereq (proto_t protocol) 1534 { 1535 switch (protocol) { 1536 /* Fall through */ 1537 #if defined(CONFIG_CMD_PING) 1538 case PING: 1539 if (NetPingIP == 0) { 1540 puts ("*** ERROR: ping address not given\n"); 1541 return (1); 1542 } 1543 goto common; 1544 #endif 1545 #if defined(CONFIG_CMD_SNTP) 1546 case SNTP: 1547 if (NetNtpServerIP == 0) { 1548 puts ("*** ERROR: NTP server address not given\n"); 1549 return (1); 1550 } 1551 goto common; 1552 #endif 1553 #if defined(CONFIG_CMD_NFS) 1554 case NFS: 1555 #endif 1556 case NETCONS: 1557 case TFTP: 1558 if (NetServerIP == 0) { 1559 puts ("*** ERROR: `serverip' not set\n"); 1560 return (1); 1561 } 1562 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) 1563 common: 1564 #endif 1565 1566 if (NetOurIP == 0) { 1567 puts ("*** ERROR: `ipaddr' not set\n"); 1568 return (1); 1569 } 1570 /* Fall through */ 1571 1572 case DHCP: 1573 case RARP: 1574 case BOOTP: 1575 case CDP: 1576 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1577 #ifdef CONFIG_NET_MULTI 1578 extern int eth_get_dev_index (void); 1579 int num = eth_get_dev_index (); 1580 1581 switch (num) { 1582 case -1: 1583 puts ("*** ERROR: No ethernet found.\n"); 1584 return (1); 1585 case 0: 1586 puts ("*** ERROR: `ethaddr' not set\n"); 1587 break; 1588 default: 1589 printf ("*** ERROR: `eth%daddr' not set\n", 1590 num); 1591 break; 1592 } 1593 1594 NetStartAgain (); 1595 return (2); 1596 #else 1597 puts ("*** ERROR: `ethaddr' not set\n"); 1598 return (1); 1599 #endif 1600 } 1601 /* Fall through */ 1602 default: 1603 return (0); 1604 } 1605 return (0); /* OK */ 1606 } 1607 /**********************************************************************/ 1608 1609 int 1610 NetCksumOk(uchar * ptr, int len) 1611 { 1612 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1613 } 1614 1615 1616 unsigned 1617 NetCksum(uchar * ptr, int len) 1618 { 1619 ulong xsum; 1620 ushort *p = (ushort *)ptr; 1621 1622 xsum = 0; 1623 while (len-- > 0) 1624 xsum += *p++; 1625 xsum = (xsum & 0xffff) + (xsum >> 16); 1626 xsum = (xsum & 0xffff) + (xsum >> 16); 1627 return (xsum & 0xffff); 1628 } 1629 1630 int 1631 NetEthHdrSize(void) 1632 { 1633 ushort myvlanid; 1634 1635 myvlanid = ntohs(NetOurVLAN); 1636 if (myvlanid == (ushort)-1) 1637 myvlanid = VLAN_NONE; 1638 1639 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1640 } 1641 1642 int 1643 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1644 { 1645 Ethernet_t *et = (Ethernet_t *)xet; 1646 ushort myvlanid; 1647 1648 myvlanid = ntohs(NetOurVLAN); 1649 if (myvlanid == (ushort)-1) 1650 myvlanid = VLAN_NONE; 1651 1652 memcpy (et->et_dest, addr, 6); 1653 memcpy (et->et_src, NetOurEther, 6); 1654 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1655 et->et_protlen = htons(prot); 1656 return ETHER_HDR_SIZE; 1657 } else { 1658 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1659 1660 vet->vet_vlan_type = htons(PROT_VLAN); 1661 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1662 vet->vet_type = htons(prot); 1663 return VLAN_ETHER_HDR_SIZE; 1664 } 1665 } 1666 1667 void 1668 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1669 { 1670 volatile IP_t *ip = (IP_t *)xip; 1671 1672 /* 1673 * If the data is an odd number of bytes, zero the 1674 * byte after the last byte so that the checksum 1675 * will work. 1676 */ 1677 if (len & 1) 1678 xip[IP_HDR_SIZE + len] = 0; 1679 1680 /* 1681 * Construct an IP and UDP header. 1682 * (need to set no fragment bit - XXX) 1683 */ 1684 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1685 ip->ip_tos = 0; 1686 ip->ip_len = htons(IP_HDR_SIZE + len); 1687 ip->ip_id = htons(NetIPID++); 1688 ip->ip_off = htons(0x4000); /* No fragmentation */ 1689 ip->ip_ttl = 255; 1690 ip->ip_p = 17; /* UDP */ 1691 ip->ip_sum = 0; 1692 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1693 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1694 ip->udp_src = htons(sport); 1695 ip->udp_dst = htons(dport); 1696 ip->udp_len = htons(8 + len); 1697 ip->udp_xsum = 0; 1698 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1699 } 1700 1701 void copy_filename (char *dst, char *src, int size) 1702 { 1703 if (*src && (*src == '"')) { 1704 ++src; 1705 --size; 1706 } 1707 1708 while ((--size > 0) && *src && (*src != '"')) { 1709 *dst++ = *src++; 1710 } 1711 *dst = '\0'; 1712 } 1713 1714 #endif 1715 1716 void ip_to_string (IPaddr_t x, char *s) 1717 { 1718 x = ntohl (x); 1719 sprintf (s, "%d.%d.%d.%d", 1720 (int) ((x >> 24) & 0xff), 1721 (int) ((x >> 16) & 0xff), 1722 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1723 ); 1724 } 1725 1726 IPaddr_t string_to_ip(char *s) 1727 { 1728 IPaddr_t addr; 1729 char *e; 1730 int i; 1731 1732 if (s == NULL) 1733 return(0); 1734 1735 for (addr=0, i=0; i<4; ++i) { 1736 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1737 addr <<= 8; 1738 addr |= (val & 0xFF); 1739 if (s) { 1740 s = (*e) ? e+1 : e; 1741 } 1742 } 1743 1744 return (htonl(addr)); 1745 } 1746 1747 void VLAN_to_string(ushort x, char *s) 1748 { 1749 x = ntohs(x); 1750 1751 if (x == (ushort)-1) 1752 x = VLAN_NONE; 1753 1754 if (x == VLAN_NONE) 1755 strcpy(s, "none"); 1756 else 1757 sprintf(s, "%d", x & VLAN_IDMASK); 1758 } 1759 1760 ushort string_to_VLAN(char *s) 1761 { 1762 ushort id; 1763 1764 if (s == NULL) 1765 return htons(VLAN_NONE); 1766 1767 if (*s < '0' || *s > '9') 1768 id = VLAN_NONE; 1769 else 1770 id = (ushort)simple_strtoul(s, NULL, 10); 1771 1772 return htons(id); 1773 } 1774 1775 void print_IPaddr (IPaddr_t x) 1776 { 1777 char tmp[16]; 1778 1779 ip_to_string (x, tmp); 1780 1781 puts (tmp); 1782 } 1783 1784 IPaddr_t getenv_IPaddr (char *var) 1785 { 1786 return (string_to_ip(getenv(var))); 1787 } 1788 1789 ushort getenv_VLAN(char *var) 1790 { 1791 return (string_to_VLAN(getenv(var))); 1792 } 1793