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 (CONFIG_COMMANDS & CFG_CMD_SNTP) 90 #include "sntp.h" 91 #endif 92 93 #if (CONFIG_COMMANDS & CFG_CMD_NET) 94 95 #define ARP_TIMEOUT 5 /* Seconds before trying ARP again */ 96 #ifndef CONFIG_NET_RETRY_COUNT 97 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 98 #else 99 # define ARP_TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) 100 #endif 101 102 #if 0 103 #define ET_DEBUG 104 #endif 105 106 /** BOOTP EXTENTIONS **/ 107 108 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 109 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 110 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 111 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2) 112 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 113 #endif 114 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 115 char NetOurHostName[32]={0,}; /* Our hostname */ 116 char NetOurRootPath[64]={0,}; /* Our bootpath */ 117 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 118 119 /** END OF BOOTP EXTENTIONS **/ 120 121 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 122 uchar NetOurEther[6]; /* Our ethernet address */ 123 uchar NetServerEther[6] = /* Boot server enet address */ 124 { 0, 0, 0, 0, 0, 0 }; 125 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 126 IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */ 127 volatile uchar *NetRxPkt; /* Current receive packet */ 128 int NetRxPktLen; /* Current rx packet length */ 129 unsigned NetIPID; /* IP packet ID */ 130 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 131 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 132 uchar NetEtherNullAddr[6] = 133 { 0, 0, 0, 0, 0, 0 }; 134 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 135 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 136 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 137 #endif 138 int NetState; /* Network loop state */ 139 #ifdef CONFIG_NET_MULTI 140 int NetRestartWrap = 0; /* Tried all network devices */ 141 static int NetRestarted = 0; /* Network loop restarted */ 142 static int NetDevExists = 0; /* At least one device configured */ 143 #endif 144 145 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 146 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 147 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 148 149 char BootFile[128]; /* Boot File name */ 150 151 #if (CONFIG_COMMANDS & CFG_CMD_PING) 152 IPaddr_t NetPingIP; /* the ip address to ping */ 153 154 static void PingStart(void); 155 #endif 156 157 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 158 static void CDPStart(void); 159 #endif 160 161 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 162 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 163 int NetTimeOffset=0; /* offset time from UTC */ 164 #endif 165 166 #ifdef CONFIG_NETCONSOLE 167 void NcStart(void); 168 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 169 #endif 170 171 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 172 173 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 174 175 static rxhand_f *packetHandler; /* Current RX packet handler */ 176 static thand_f *timeHandler; /* Current timeout handler */ 177 static ulong timeStart; /* Time base value */ 178 static ulong timeDelta; /* Current timeout value */ 179 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 180 181 static int net_check_prereq (proto_t protocol); 182 183 /**********************************************************************/ 184 185 IPaddr_t NetArpWaitPacketIP; 186 IPaddr_t NetArpWaitReplyIP; 187 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 188 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 189 int NetArpWaitTxPacketSize; 190 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 191 ulong NetArpWaitTimerStart; 192 int NetArpWaitTry; 193 194 void ArpRequest (void) 195 { 196 int i; 197 volatile uchar *pkt; 198 ARP_t *arp; 199 200 #ifdef ET_DEBUG 201 printf ("ARP broadcast %d\n", NetArpWaitTry); 202 #endif 203 pkt = NetTxPacket; 204 205 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 206 207 arp = (ARP_t *) pkt; 208 209 arp->ar_hrd = htons (ARP_ETHER); 210 arp->ar_pro = htons (PROT_IP); 211 arp->ar_hln = 6; 212 arp->ar_pln = 4; 213 arp->ar_op = htons (ARPOP_REQUEST); 214 215 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 216 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 217 for (i = 10; i < 16; ++i) { 218 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 219 } 220 221 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 222 (NetOurIP & NetOurSubnetMask)) { 223 if (NetOurGatewayIP == 0) { 224 puts ("## Warning: gatewayip needed but not set\n"); 225 } 226 NetArpWaitReplyIP = NetOurGatewayIP; 227 } else { 228 NetArpWaitReplyIP = NetArpWaitPacketIP; 229 } 230 231 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 232 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 233 } 234 235 void ArpTimeoutCheck(void) 236 { 237 ulong t; 238 239 if (!NetArpWaitPacketIP) 240 return; 241 242 t = get_timer(0); 243 244 /* check for arp timeout */ 245 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) { 246 NetArpWaitTry++; 247 248 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 249 puts ("\nARP Retry count exceeded; starting again\n"); 250 NetArpWaitTry = 0; 251 NetStartAgain(); 252 } else { 253 NetArpWaitTimerStart = t; 254 ArpRequest(); 255 } 256 } 257 } 258 259 /**********************************************************************/ 260 /* 261 * Main network processing loop. 262 */ 263 264 int 265 NetLoop(proto_t protocol) 266 { 267 DECLARE_GLOBAL_DATA_PTR; 268 269 bd_t *bd = gd->bd; 270 271 #ifdef CONFIG_NET_MULTI 272 NetRestarted = 0; 273 NetDevExists = 0; 274 #endif 275 276 /* XXX problem with bss workaround */ 277 NetArpWaitPacketMAC = NULL; 278 NetArpWaitTxPacket = NULL; 279 NetArpWaitPacketIP = 0; 280 NetArpWaitReplyIP = 0; 281 NetArpWaitTxPacket = NULL; 282 NetTxPacket = NULL; 283 284 if (!NetTxPacket) { 285 int i; 286 /* 287 * Setup packet buffers, aligned correctly. 288 */ 289 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 290 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 291 for (i = 0; i < PKTBUFSRX; i++) { 292 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 293 } 294 } 295 296 if (!NetArpWaitTxPacket) { 297 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 298 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 299 NetArpWaitTxPacketSize = 0; 300 } 301 302 eth_halt(); 303 #ifdef CONFIG_NET_MULTI 304 eth_set_current(); 305 #endif 306 if (eth_init(bd) < 0) 307 return(-1); 308 309 restart: 310 #ifdef CONFIG_NET_MULTI 311 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 312 #else 313 memcpy (NetOurEther, bd->bi_enetaddr, 6); 314 #endif 315 316 NetState = NETLOOP_CONTINUE; 317 318 /* 319 * Start the ball rolling with the given start function. From 320 * here on, this code is a state machine driven by received 321 * packets and timer events. 322 */ 323 324 switch (protocol) { 325 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 326 case NFS: 327 #endif 328 #if (CONFIG_COMMANDS & CFG_CMD_PING) 329 case PING: 330 #endif 331 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 332 case SNTP: 333 #endif 334 case NETCONS: 335 case TFTP: 336 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 337 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 338 NetOurSubnetMask= getenv_IPaddr ("netmask"); 339 NetOurVLAN = getenv_VLAN("vlan"); 340 NetOurNativeVLAN = getenv_VLAN("nvlan"); 341 342 switch (protocol) { 343 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 344 case NFS: 345 #endif 346 case NETCONS: 347 case TFTP: 348 NetServerIP = getenv_IPaddr ("serverip"); 349 break; 350 #if (CONFIG_COMMANDS & CFG_CMD_PING) 351 case PING: 352 /* nothing */ 353 break; 354 #endif 355 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 356 case SNTP: 357 /* nothing */ 358 break; 359 #endif 360 default: 361 break; 362 } 363 364 break; 365 case BOOTP: 366 case RARP: 367 /* 368 * initialize our IP addr to 0 in order to accept ANY 369 * IP addr assigned to us by the BOOTP / RARP server 370 */ 371 NetOurIP = 0; 372 NetServerIP = getenv_IPaddr ("serverip"); 373 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 374 NetOurNativeVLAN = getenv_VLAN("nvlan"); 375 case CDP: 376 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 377 NetOurNativeVLAN = getenv_VLAN("nvlan"); 378 break; 379 default: 380 break; 381 } 382 383 switch (net_check_prereq (protocol)) { 384 case 1: 385 /* network not configured */ 386 return (-1); 387 388 #ifdef CONFIG_NET_MULTI 389 case 2: 390 /* network device not configured */ 391 break; 392 #endif /* CONFIG_NET_MULTI */ 393 394 case 0: 395 #ifdef CONFIG_NET_MULTI 396 NetDevExists = 1; 397 #endif 398 switch (protocol) { 399 case TFTP: 400 /* always use ARP to get server ethernet address */ 401 TftpStart(); 402 break; 403 404 #if (CONFIG_COMMANDS & CFG_CMD_DHCP) 405 case DHCP: 406 /* Start with a clean slate... */ 407 BootpTry = 0; 408 NetOurIP = 0; 409 NetServerIP = getenv_IPaddr ("serverip"); 410 DhcpRequest(); /* Basically same as BOOTP */ 411 break; 412 #endif /* CFG_CMD_DHCP */ 413 414 case BOOTP: 415 BootpTry = 0; 416 BootpRequest (); 417 break; 418 419 case RARP: 420 RarpTry = 0; 421 RarpRequest (); 422 break; 423 #if (CONFIG_COMMANDS & CFG_CMD_PING) 424 case PING: 425 PingStart(); 426 break; 427 #endif 428 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 429 case NFS: 430 NfsStart(); 431 break; 432 #endif 433 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 434 case CDP: 435 CDPStart(); 436 break; 437 #endif 438 #ifdef CONFIG_NETCONSOLE 439 case NETCONS: 440 NcStart(); 441 break; 442 #endif 443 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 444 case SNTP: 445 SntpStart(); 446 break; 447 #endif 448 default: 449 break; 450 } 451 452 NetBootFileXferSize = 0; 453 break; 454 } 455 456 #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII) 457 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 458 /* 459 * Echo the inverted link state to the fault LED. 460 */ 461 if(miiphy_link(CFG_FAULT_MII_ADDR)) { 462 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 463 } else { 464 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 465 } 466 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 467 #endif /* CONFIG_MII, ... */ 468 469 /* 470 * Main packet reception loop. Loop receiving packets until 471 * someone sets `NetState' to a state that terminates. 472 */ 473 for (;;) { 474 WATCHDOG_RESET(); 475 #ifdef CONFIG_SHOW_ACTIVITY 476 { 477 extern void show_activity(int arg); 478 show_activity(1); 479 } 480 #endif 481 /* 482 * Check the ethernet for a new packet. The ethernet 483 * receive routine will process it. 484 */ 485 eth_rx(); 486 487 /* 488 * Abort if ctrl-c was pressed. 489 */ 490 if (ctrlc()) { 491 eth_halt(); 492 puts ("\nAbort\n"); 493 return (-1); 494 } 495 496 ArpTimeoutCheck(); 497 498 /* 499 * Check for a timeout, and run the timeout handler 500 * if we have one. 501 */ 502 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 503 thand_f *x; 504 505 #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII) 506 # if defined(CFG_FAULT_ECHO_LINK_DOWN) && 507 defined(CONFIG_STATUS_LED) && 508 defined(STATUS_LED_RED) 509 /* 510 * Echo the inverted link state to the fault LED. 511 */ 512 if(miiphy_link(CFG_FAULT_MII_ADDR)) { 513 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 514 } else { 515 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 516 } 517 # endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 518 #endif /* CONFIG_MII, ... */ 519 x = timeHandler; 520 timeHandler = (thand_f *)0; 521 (*x)(); 522 } 523 524 525 switch (NetState) { 526 527 case NETLOOP_RESTART: 528 #ifdef CONFIG_NET_MULTI 529 NetRestarted = 1; 530 #endif 531 goto restart; 532 533 case NETLOOP_SUCCESS: 534 if (NetBootFileXferSize > 0) { 535 char buf[10]; 536 printf("Bytes transferred = %ld (%lx hex)\n", 537 NetBootFileXferSize, 538 NetBootFileXferSize); 539 sprintf(buf, "%lx", NetBootFileXferSize); 540 setenv("filesize", buf); 541 542 sprintf(buf, "%lX", (unsigned long)load_addr); 543 setenv("fileaddr", buf); 544 } 545 eth_halt(); 546 return NetBootFileXferSize; 547 548 case NETLOOP_FAIL: 549 return (-1); 550 } 551 } 552 } 553 554 /**********************************************************************/ 555 556 static void 557 startAgainTimeout(void) 558 { 559 NetState = NETLOOP_RESTART; 560 } 561 562 static void 563 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 564 { 565 /* Totally ignore the packet */ 566 } 567 568 void NetStartAgain (void) 569 { 570 #ifdef CONFIG_NET_MULTI 571 DECLARE_GLOBAL_DATA_PTR; 572 #endif 573 char *nretry; 574 int noretry = 0, once = 0; 575 576 if ((nretry = getenv ("netretry")) != NULL) { 577 noretry = (strcmp (nretry, "no") == 0); 578 once = (strcmp (nretry, "once") == 0); 579 } 580 if (noretry) { 581 eth_halt (); 582 NetState = NETLOOP_FAIL; 583 return; 584 } 585 #ifndef CONFIG_NET_MULTI 586 NetSetTimeout (10 * CFG_HZ, startAgainTimeout); 587 NetSetHandler (startAgainHandler); 588 #else /* !CONFIG_NET_MULTI*/ 589 eth_halt (); 590 eth_try_another (!NetRestarted); 591 eth_init (gd->bd); 592 if (NetRestartWrap) { 593 NetRestartWrap = 0; 594 if (NetDevExists && !once) { 595 NetSetTimeout (10 * CFG_HZ, startAgainTimeout); 596 NetSetHandler (startAgainHandler); 597 } else { 598 NetState = NETLOOP_FAIL; 599 } 600 } else { 601 NetState = NETLOOP_RESTART; 602 } 603 #endif /* CONFIG_NET_MULTI */ 604 } 605 606 /**********************************************************************/ 607 /* 608 * Miscelaneous bits. 609 */ 610 611 void 612 NetSetHandler(rxhand_f * f) 613 { 614 packetHandler = f; 615 } 616 617 618 void 619 NetSetTimeout(ulong iv, thand_f * f) 620 { 621 if (iv == 0) { 622 timeHandler = (thand_f *)0; 623 } else { 624 timeHandler = f; 625 timeStart = get_timer(0); 626 timeDelta = iv; 627 } 628 } 629 630 631 void 632 NetSendPacket(volatile uchar * pkt, int len) 633 { 634 (void) eth_send(pkt, len); 635 } 636 637 int 638 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 639 { 640 uchar *pkt; 641 642 /* convert to new style broadcast */ 643 if (dest == 0) 644 dest = 0xFFFFFFFF; 645 646 /* if broadcast, make the ether address a broadcast and don't do ARP */ 647 if (dest == 0xFFFFFFFF) 648 ether = NetBcastAddr; 649 650 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 651 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 652 653 #ifdef ET_DEBUG 654 printf("sending ARP for %08lx\n", dest); 655 #endif 656 NetArpWaitPacketIP = dest; 657 NetArpWaitPacketMAC = ether; 658 659 pkt = NetArpWaitTxPacket; 660 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 661 662 NetSetIP (pkt, dest, dport, sport, len); 663 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 664 665 /* size of the waiting packet */ 666 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 667 668 /* and do the ARP request */ 669 NetArpWaitTry = 1; 670 NetArpWaitTimerStart = get_timer(0); 671 ArpRequest(); 672 return 1; /* waiting */ 673 } 674 675 #ifdef ET_DEBUG 676 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", 677 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 678 #endif 679 680 pkt = (uchar *)NetTxPacket; 681 pkt += NetSetEther (pkt, ether, PROT_IP); 682 NetSetIP (pkt, dest, dport, sport, len); 683 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 684 685 return 0; /* transmitted */ 686 } 687 688 #if (CONFIG_COMMANDS & CFG_CMD_PING) 689 static ushort PingSeqNo; 690 691 int PingSend(void) 692 { 693 static uchar mac[6]; 694 volatile IP_t *ip; 695 volatile ushort *s; 696 uchar *pkt; 697 698 /* XXX always send arp request */ 699 700 memcpy(mac, NetEtherNullAddr, 6); 701 702 #ifdef ET_DEBUG 703 printf("sending ARP for %08lx\n", NetPingIP); 704 #endif 705 706 NetArpWaitPacketIP = NetPingIP; 707 NetArpWaitPacketMAC = mac; 708 709 pkt = NetArpWaitTxPacket; 710 pkt += NetSetEther(pkt, mac, PROT_IP); 711 712 ip = (volatile IP_t *)pkt; 713 714 /* 715 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 716 */ 717 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 718 ip->ip_tos = 0; 719 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 720 ip->ip_id = htons(NetIPID++); 721 ip->ip_off = htons(0x4000); /* No fragmentation */ 722 ip->ip_ttl = 255; 723 ip->ip_p = 0x01; /* ICMP */ 724 ip->ip_sum = 0; 725 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 726 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 727 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 728 729 s = &ip->udp_src; /* XXX ICMP starts here */ 730 s[0] = htons(0x0800); /* echo-request, code */ 731 s[1] = 0; /* checksum */ 732 s[2] = 0; /* identifier */ 733 s[3] = htons(PingSeqNo++); /* sequence number */ 734 s[1] = ~NetCksum((uchar *)s, 8/2); 735 736 /* size of the waiting packet */ 737 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 738 739 /* and do the ARP request */ 740 NetArpWaitTry = 1; 741 NetArpWaitTimerStart = get_timer(0); 742 ArpRequest(); 743 return 1; /* waiting */ 744 } 745 746 static void 747 PingTimeout (void) 748 { 749 eth_halt(); 750 NetState = NETLOOP_FAIL; /* we did not get the reply */ 751 } 752 753 static void 754 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 755 { 756 IPaddr_t tmp; 757 volatile IP_t *ip = (volatile IP_t *)pkt; 758 759 tmp = NetReadIP((void *)&ip->ip_src); 760 if (tmp != NetPingIP) 761 return; 762 763 NetState = NETLOOP_SUCCESS; 764 } 765 766 static void PingStart(void) 767 { 768 #if defined(CONFIG_NET_MULTI) 769 printf ("Using %s device\n", eth_get_name()); 770 #endif /* CONFIG_NET_MULTI */ 771 NetSetTimeout (10 * CFG_HZ, PingTimeout); 772 NetSetHandler (PingHandler); 773 774 PingSend(); 775 } 776 #endif /* CFG_CMD_PING */ 777 778 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 779 780 #define CDP_DEVICE_ID_TLV 0x0001 781 #define CDP_ADDRESS_TLV 0x0002 782 #define CDP_PORT_ID_TLV 0x0003 783 #define CDP_CAPABILITIES_TLV 0x0004 784 #define CDP_VERSION_TLV 0x0005 785 #define CDP_PLATFORM_TLV 0x0006 786 #define CDP_NATIVE_VLAN_TLV 0x000a 787 #define CDP_APPLIANCE_VLAN_TLV 0x000e 788 #define CDP_TRIGGER_TLV 0x000f 789 #define CDP_POWER_CONSUMPTION_TLV 0x0010 790 #define CDP_SYSNAME_TLV 0x0014 791 #define CDP_SYSOBJECT_TLV 0x0015 792 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 793 794 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */ 795 796 static int CDPSeq; 797 static int CDPOK; 798 799 ushort CDPNativeVLAN; 800 ushort CDPApplianceVLAN; 801 802 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 803 804 static ushort CDP_compute_csum(const uchar *buff, ushort len) 805 { 806 ushort csum; 807 int odd; 808 ulong result = 0; 809 ushort leftover; 810 811 if (len > 0) { 812 odd = 1 & (ulong)buff; 813 if (odd) { 814 result = *buff << 8; 815 len--; 816 buff++; 817 } 818 while (len > 1) { 819 result += *((const ushort *)buff)++; 820 if (result & 0x80000000) 821 result = (result & 0xFFFF) + (result >> 16); 822 len -= 2; 823 } 824 if (len) { 825 leftover = (signed short)(*(const signed char *)buff); 826 /* * XXX CISCO SUCKS big time! (and blows too) */ 827 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 828 } 829 while (result >> 16) 830 result = (result & 0xFFFF) + (result >> 16); 831 832 if (odd) 833 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 834 } 835 836 /* add up 16-bit and 17-bit words for 17+c bits */ 837 result = (result & 0xffff) + (result >> 16); 838 /* add up 16-bit and 2-bit for 16+c bit */ 839 result = (result & 0xffff) + (result >> 16); 840 /* add up carry.. */ 841 result = (result & 0xffff) + (result >> 16); 842 843 /* negate */ 844 csum = ~(ushort)result; 845 846 /* run time endian detection */ 847 if (csum != htons(csum)) /* little endian */ 848 csum = htons(csum); 849 850 return csum; 851 } 852 853 int CDPSendTrigger(void) 854 { 855 volatile uchar *pkt; 856 volatile ushort *s; 857 volatile ushort *cp; 858 Ethernet_t *et; 859 int len; 860 ushort chksum; 861 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 862 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 863 char buf[32]; 864 #endif 865 866 pkt = NetTxPacket; 867 et = (Ethernet_t *)pkt; 868 869 /* NOTE: trigger sent not on any VLAN */ 870 871 /* form ethernet header */ 872 memcpy(et->et_dest, NetCDPAddr, 6); 873 memcpy(et->et_src, NetOurEther, 6); 874 875 pkt += ETHER_HDR_SIZE; 876 877 /* SNAP header */ 878 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 879 pkt += sizeof(CDP_SNAP_hdr); 880 881 /* CDP header */ 882 *pkt++ = 0x02; /* CDP version 2 */ 883 *pkt++ = 180; /* TTL */ 884 s = (volatile ushort *)pkt; 885 cp = s; 886 *s++ = htons(0); /* checksum (0 for later calculation) */ 887 888 /* CDP fields */ 889 #ifdef CONFIG_CDP_DEVICE_ID 890 *s++ = htons(CDP_DEVICE_ID_TLV); 891 *s++ = htons(CONFIG_CDP_DEVICE_ID); 892 memset(buf, 0, sizeof(buf)); 893 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 894 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 895 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 896 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 897 memcpy((uchar *)s, buf, 16); 898 s += 16 / 2; 899 #endif 900 901 #ifdef CONFIG_CDP_PORT_ID 902 *s++ = htons(CDP_PORT_ID_TLV); 903 memset(buf, 0, sizeof(buf)); 904 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 905 len = strlen(buf); 906 if (len & 1) /* make it even */ 907 len++; 908 *s++ = htons(len + 4); 909 memcpy((uchar *)s, buf, len); 910 s += len / 2; 911 #endif 912 913 #ifdef CONFIG_CDP_CAPABILITIES 914 *s++ = htons(CDP_CAPABILITIES_TLV); 915 *s++ = htons(8); 916 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 917 s += 2; 918 #endif 919 920 #ifdef CONFIG_CDP_VERSION 921 *s++ = htons(CDP_VERSION_TLV); 922 memset(buf, 0, sizeof(buf)); 923 strcpy(buf, CONFIG_CDP_VERSION); 924 len = strlen(buf); 925 if (len & 1) /* make it even */ 926 len++; 927 *s++ = htons(len + 4); 928 memcpy((uchar *)s, buf, len); 929 s += len / 2; 930 #endif 931 932 #ifdef CONFIG_CDP_PLATFORM 933 *s++ = htons(CDP_PLATFORM_TLV); 934 memset(buf, 0, sizeof(buf)); 935 strcpy(buf, CONFIG_CDP_PLATFORM); 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_TRIGGER 945 *s++ = htons(CDP_TRIGGER_TLV); 946 *s++ = htons(8); 947 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 948 s += 2; 949 #endif 950 951 #ifdef CONFIG_CDP_POWER_CONSUMPTION 952 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 953 *s++ = htons(6); 954 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 955 #endif 956 957 /* length of ethernet packet */ 958 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 959 et->et_protlen = htons(len); 960 961 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 962 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 963 if (chksum == 0) 964 chksum = 0xFFFF; 965 *cp = htons(chksum); 966 967 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 968 return 0; 969 } 970 971 static void 972 CDPTimeout (void) 973 { 974 CDPSeq++; 975 976 if (CDPSeq < 3) { 977 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 978 CDPSendTrigger(); 979 return; 980 } 981 982 /* if not OK try again */ 983 if (!CDPOK) 984 NetStartAgain(); 985 else 986 NetState = NETLOOP_SUCCESS; 987 } 988 989 static void 990 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 991 { 992 /* nothing */ 993 } 994 995 static void 996 CDPHandler(const uchar * pkt, unsigned len) 997 { 998 const uchar *t; 999 const ushort *ss; 1000 ushort type, tlen; 1001 uchar applid; 1002 ushort vlan, nvlan; 1003 1004 /* minimum size? */ 1005 if (len < sizeof(CDP_SNAP_hdr) + 4) 1006 goto pkt_short; 1007 1008 /* check for valid CDP SNAP header */ 1009 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1010 return; 1011 1012 pkt += sizeof(CDP_SNAP_hdr); 1013 len -= sizeof(CDP_SNAP_hdr); 1014 1015 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1016 if (pkt[0] < 0x02 || pkt[1] == 0) 1017 return; 1018 1019 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1020 if (pkt[0] != 0x02) 1021 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1022 pkt[0] & 0xff); 1023 1024 if (CDP_compute_csum(pkt, len) != 0) 1025 return; 1026 1027 pkt += 4; 1028 len -= 4; 1029 1030 vlan = htons(-1); 1031 nvlan = htons(-1); 1032 while (len > 0) { 1033 if (len < 4) 1034 goto pkt_short; 1035 1036 ss = (const ushort *)pkt; 1037 type = ntohs(ss[0]); 1038 tlen = ntohs(ss[1]); 1039 if (tlen > len) { 1040 goto pkt_short; 1041 } 1042 1043 pkt += tlen; 1044 len -= tlen; 1045 1046 ss += 2; /* point ss to the data of the TLV */ 1047 tlen -= 4; 1048 1049 switch (type) { 1050 case CDP_DEVICE_ID_TLV: 1051 break; 1052 case CDP_ADDRESS_TLV: 1053 break; 1054 case CDP_PORT_ID_TLV: 1055 break; 1056 case CDP_CAPABILITIES_TLV: 1057 break; 1058 case CDP_VERSION_TLV: 1059 break; 1060 case CDP_PLATFORM_TLV: 1061 break; 1062 case CDP_NATIVE_VLAN_TLV: 1063 nvlan = *ss; 1064 break; 1065 case CDP_APPLIANCE_VLAN_TLV: 1066 t = (const uchar *)ss; 1067 while (tlen > 0) { 1068 if (tlen < 3) 1069 goto pkt_short; 1070 1071 applid = t[0]; 1072 ss = (const ushort *)(t + 1); 1073 1074 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1075 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1076 vlan = *ss; 1077 #else 1078 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1079 #endif 1080 t += 3; tlen -= 3; 1081 } 1082 break; 1083 case CDP_TRIGGER_TLV: 1084 break; 1085 case CDP_POWER_CONSUMPTION_TLV: 1086 break; 1087 case CDP_SYSNAME_TLV: 1088 break; 1089 case CDP_SYSOBJECT_TLV: 1090 break; 1091 case CDP_MANAGEMENT_ADDRESS_TLV: 1092 break; 1093 } 1094 } 1095 1096 CDPApplianceVLAN = vlan; 1097 CDPNativeVLAN = nvlan; 1098 1099 CDPOK = 1; 1100 return; 1101 1102 pkt_short: 1103 printf("** CDP packet is too short\n"); 1104 return; 1105 } 1106 1107 static void CDPStart(void) 1108 { 1109 #if defined(CONFIG_NET_MULTI) 1110 printf ("Using %s device\n", eth_get_name()); 1111 #endif 1112 CDPSeq = 0; 1113 CDPOK = 0; 1114 1115 CDPNativeVLAN = htons(-1); 1116 CDPApplianceVLAN = htons(-1); 1117 1118 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1119 NetSetHandler (CDPDummyHandler); 1120 1121 CDPSendTrigger(); 1122 } 1123 #endif /* CFG_CMD_CDP */ 1124 1125 1126 void 1127 NetReceive(volatile uchar * inpkt, int len) 1128 { 1129 Ethernet_t *et; 1130 IP_t *ip; 1131 ARP_t *arp; 1132 IPaddr_t tmp; 1133 int x; 1134 uchar *pkt; 1135 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1136 int iscdp; 1137 #endif 1138 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1139 1140 #ifdef ET_DEBUG 1141 printf("packet received\n"); 1142 #endif 1143 1144 NetRxPkt = inpkt; 1145 NetRxPktLen = len; 1146 et = (Ethernet_t *)inpkt; 1147 1148 /* too small packet? */ 1149 if (len < ETHER_HDR_SIZE) 1150 return; 1151 1152 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1153 /* keep track if packet is CDP */ 1154 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1155 #endif 1156 1157 myvlanid = ntohs(NetOurVLAN); 1158 if (myvlanid == (ushort)-1) 1159 myvlanid = VLAN_NONE; 1160 mynvlanid = ntohs(NetOurNativeVLAN); 1161 if (mynvlanid == (ushort)-1) 1162 mynvlanid = VLAN_NONE; 1163 1164 x = ntohs(et->et_protlen); 1165 1166 #ifdef ET_DEBUG 1167 printf("packet received\n"); 1168 #endif 1169 1170 if (x < 1514) { 1171 /* 1172 * Got a 802 packet. Check the other protocol field. 1173 */ 1174 x = ntohs(et->et_prot); 1175 1176 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1177 len -= E802_HDR_SIZE; 1178 1179 } else if (x != PROT_VLAN) { /* normal packet */ 1180 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1181 len -= ETHER_HDR_SIZE; 1182 1183 } else { /* VLAN packet */ 1184 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1185 1186 #ifdef ET_DEBUG 1187 printf("VLAN packet received\n"); 1188 #endif 1189 /* too small packet? */ 1190 if (len < VLAN_ETHER_HDR_SIZE) 1191 return; 1192 1193 /* if no VLAN active */ 1194 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1195 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1196 && iscdp == 0 1197 #endif 1198 ) 1199 return; 1200 1201 cti = ntohs(vet->vet_tag); 1202 vlanid = cti & VLAN_IDMASK; 1203 x = ntohs(vet->vet_type); 1204 1205 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1206 len -= VLAN_ETHER_HDR_SIZE; 1207 } 1208 1209 #ifdef ET_DEBUG 1210 printf("Receive from protocol 0x%x\n", x); 1211 #endif 1212 1213 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1214 if (iscdp) { 1215 CDPHandler((uchar *)ip, len); 1216 return; 1217 } 1218 #endif 1219 1220 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1221 if (vlanid == VLAN_NONE) 1222 vlanid = (mynvlanid & VLAN_IDMASK); 1223 /* not matched? */ 1224 if (vlanid != (myvlanid & VLAN_IDMASK)) 1225 return; 1226 } 1227 1228 switch (x) { 1229 1230 case PROT_ARP: 1231 /* 1232 * We have to deal with two types of ARP packets: 1233 * - REQUEST packets will be answered by sending our 1234 * IP address - if we know it. 1235 * - REPLY packates are expected only after we asked 1236 * for the TFTP server's or the gateway's ethernet 1237 * address; so if we receive such a packet, we set 1238 * the server ethernet address 1239 */ 1240 #ifdef ET_DEBUG 1241 puts ("Got ARP\n"); 1242 #endif 1243 arp = (ARP_t *)ip; 1244 if (len < ARP_HDR_SIZE) { 1245 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1246 return; 1247 } 1248 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1249 return; 1250 } 1251 if (ntohs(arp->ar_pro) != PROT_IP) { 1252 return; 1253 } 1254 if (arp->ar_hln != 6) { 1255 return; 1256 } 1257 if (arp->ar_pln != 4) { 1258 return; 1259 } 1260 1261 if (NetOurIP == 0) { 1262 return; 1263 } 1264 1265 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1266 return; 1267 } 1268 1269 switch (ntohs(arp->ar_op)) { 1270 case ARPOP_REQUEST: /* reply with our IP address */ 1271 #ifdef ET_DEBUG 1272 puts ("Got ARP REQUEST, return our IP\n"); 1273 #endif 1274 pkt = (uchar *)et; 1275 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1276 arp->ar_op = htons(ARPOP_REPLY); 1277 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1278 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1279 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1280 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1281 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1282 return; 1283 1284 case ARPOP_REPLY: /* arp reply */ 1285 /* are we waiting for a reply */ 1286 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1287 break; 1288 #ifdef ET_DEBUG 1289 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1290 arp->ar_data[0], arp->ar_data[1], 1291 arp->ar_data[2], arp->ar_data[3], 1292 arp->ar_data[4], arp->ar_data[5]); 1293 #endif 1294 1295 tmp = NetReadIP(&arp->ar_data[6]); 1296 1297 /* matched waiting packet's address */ 1298 if (tmp == NetArpWaitReplyIP) { 1299 #ifdef ET_DEBUG 1300 puts ("Got it\n"); 1301 #endif 1302 /* save address for later use */ 1303 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1304 1305 #ifdef CONFIG_NETCONSOLE 1306 (*packetHandler)(0,0,0,0); 1307 #endif 1308 /* modify header, and transmit it */ 1309 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1310 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1311 1312 /* no arp request pending now */ 1313 NetArpWaitPacketIP = 0; 1314 NetArpWaitTxPacketSize = 0; 1315 NetArpWaitPacketMAC = NULL; 1316 1317 } 1318 return; 1319 default: 1320 #ifdef ET_DEBUG 1321 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1322 #endif 1323 return; 1324 } 1325 break; 1326 1327 case PROT_RARP: 1328 #ifdef ET_DEBUG 1329 puts ("Got RARP\n"); 1330 #endif 1331 arp = (ARP_t *)ip; 1332 if (len < ARP_HDR_SIZE) { 1333 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1334 return; 1335 } 1336 1337 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1338 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1339 (ntohs(arp->ar_pro) != PROT_IP) || 1340 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1341 1342 puts ("invalid RARP header\n"); 1343 } else { 1344 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1345 if (NetServerIP == 0) 1346 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1347 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1348 1349 (*packetHandler)(0,0,0,0); 1350 } 1351 break; 1352 1353 case PROT_IP: 1354 #ifdef ET_DEBUG 1355 puts ("Got IP\n"); 1356 #endif 1357 if (len < IP_HDR_SIZE) { 1358 debug ("len bad %d < %d\n", len, IP_HDR_SIZE); 1359 return; 1360 } 1361 if (len < ntohs(ip->ip_len)) { 1362 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1363 return; 1364 } 1365 len = ntohs(ip->ip_len); 1366 #ifdef ET_DEBUG 1367 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1368 #endif 1369 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1370 return; 1371 } 1372 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ 1373 return; 1374 } 1375 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1376 puts ("checksum bad\n"); 1377 return; 1378 } 1379 tmp = NetReadIP(&ip->ip_dst); 1380 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1381 return; 1382 } 1383 /* 1384 * watch for ICMP host redirects 1385 * 1386 * There is no real handler code (yet). We just watch 1387 * for ICMP host redirect messages. In case anybody 1388 * sees these messages: please contact me 1389 * (wd@denx.de), or - even better - send me the 1390 * necessary fixes :-) 1391 * 1392 * Note: in all cases where I have seen this so far 1393 * it was a problem with the router configuration, 1394 * for instance when a router was configured in the 1395 * BOOTP reply, but the TFTP server was on the same 1396 * subnet. So this is probably a warning that your 1397 * configuration might be wrong. But I'm not really 1398 * sure if there aren't any other situations. 1399 */ 1400 if (ip->ip_p == IPPROTO_ICMP) { 1401 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1402 1403 switch (icmph->type) { 1404 case ICMP_REDIRECT: 1405 if (icmph->code != ICMP_REDIR_HOST) 1406 return; 1407 puts (" ICMP Host Redirect to "); 1408 print_IPaddr(icmph->un.gateway); 1409 putc(' '); 1410 break; 1411 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1412 case ICMP_ECHO_REPLY: 1413 /* 1414 * IP header OK. Pass the packet to the current handler. 1415 */ 1416 /* XXX point to ip packet */ 1417 (*packetHandler)((uchar *)ip, 0, 0, 0); 1418 break; 1419 #endif 1420 default: 1421 return; 1422 } 1423 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1424 return; 1425 } 1426 1427 #ifdef CONFIG_NETCONSOLE 1428 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1429 ntohs(ip->udp_dst), 1430 ntohs(ip->udp_src), 1431 ntohs(ip->udp_len) - 8); 1432 #endif 1433 /* 1434 * IP header OK. Pass the packet to the current handler. 1435 */ 1436 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1437 ntohs(ip->udp_dst), 1438 ntohs(ip->udp_src), 1439 ntohs(ip->udp_len) - 8); 1440 break; 1441 } 1442 } 1443 1444 1445 /**********************************************************************/ 1446 1447 static int net_check_prereq (proto_t protocol) 1448 { 1449 switch (protocol) { 1450 /* Fall through */ 1451 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1452 case PING: 1453 if (NetPingIP == 0) { 1454 puts ("*** ERROR: ping address not given\n"); 1455 return (1); 1456 } 1457 goto common; 1458 #endif 1459 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 1460 case SNTP: 1461 if (NetNtpServerIP == 0) { 1462 puts ("*** ERROR: NTP server address not given\n"); 1463 return (1); 1464 } 1465 goto common; 1466 #endif 1467 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 1468 case NFS: 1469 #endif 1470 case NETCONS: 1471 case TFTP: 1472 if (NetServerIP == 0) { 1473 puts ("*** ERROR: `serverip' not set\n"); 1474 return (1); 1475 } 1476 #if (CONFIG_COMMANDS & (CFG_CMD_PING | CFG_CMD_SNTP)) 1477 common: 1478 #endif 1479 1480 if (NetOurIP == 0) { 1481 puts ("*** ERROR: `ipaddr' not set\n"); 1482 return (1); 1483 } 1484 /* Fall through */ 1485 1486 case DHCP: 1487 case RARP: 1488 case BOOTP: 1489 case CDP: 1490 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1491 #ifdef CONFIG_NET_MULTI 1492 extern int eth_get_dev_index (void); 1493 int num = eth_get_dev_index (); 1494 1495 switch (num) { 1496 case -1: 1497 puts ("*** ERROR: No ethernet found.\n"); 1498 return (1); 1499 case 0: 1500 puts ("*** ERROR: `ethaddr' not set\n"); 1501 break; 1502 default: 1503 printf ("*** ERROR: `eth%daddr' not set\n", 1504 num); 1505 break; 1506 } 1507 1508 NetStartAgain (); 1509 return (2); 1510 #else 1511 puts ("*** ERROR: `ethaddr' not set\n"); 1512 return (1); 1513 #endif 1514 } 1515 /* Fall through */ 1516 default: 1517 return (0); 1518 } 1519 return (0); /* OK */ 1520 } 1521 /**********************************************************************/ 1522 1523 int 1524 NetCksumOk(uchar * ptr, int len) 1525 { 1526 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1527 } 1528 1529 1530 unsigned 1531 NetCksum(uchar * ptr, int len) 1532 { 1533 ulong xsum; 1534 1535 xsum = 0; 1536 while (len-- > 0) 1537 xsum += *((ushort *)ptr)++; 1538 xsum = (xsum & 0xffff) + (xsum >> 16); 1539 xsum = (xsum & 0xffff) + (xsum >> 16); 1540 return (xsum & 0xffff); 1541 } 1542 1543 int 1544 NetEthHdrSize(void) 1545 { 1546 ushort myvlanid; 1547 1548 myvlanid = ntohs(NetOurVLAN); 1549 if (myvlanid == (ushort)-1) 1550 myvlanid = VLAN_NONE; 1551 1552 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1553 } 1554 1555 int 1556 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1557 { 1558 Ethernet_t *et = (Ethernet_t *)xet; 1559 ushort myvlanid; 1560 1561 myvlanid = ntohs(NetOurVLAN); 1562 if (myvlanid == (ushort)-1) 1563 myvlanid = VLAN_NONE; 1564 1565 memcpy (et->et_dest, addr, 6); 1566 memcpy (et->et_src, NetOurEther, 6); 1567 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1568 et->et_protlen = htons(prot); 1569 return ETHER_HDR_SIZE; 1570 } else { 1571 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1572 1573 vet->vet_vlan_type = htons(PROT_VLAN); 1574 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1575 vet->vet_type = htons(prot); 1576 return VLAN_ETHER_HDR_SIZE; 1577 } 1578 } 1579 1580 void 1581 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1582 { 1583 volatile IP_t *ip = (IP_t *)xip; 1584 1585 /* 1586 * If the data is an odd number of bytes, zero the 1587 * byte after the last byte so that the checksum 1588 * will work. 1589 */ 1590 if (len & 1) 1591 xip[IP_HDR_SIZE + len] = 0; 1592 1593 /* 1594 * Construct an IP and UDP header. 1595 * (need to set no fragment bit - XXX) 1596 */ 1597 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1598 ip->ip_tos = 0; 1599 ip->ip_len = htons(IP_HDR_SIZE + len); 1600 ip->ip_id = htons(NetIPID++); 1601 ip->ip_off = htons(0x4000); /* No fragmentation */ 1602 ip->ip_ttl = 255; 1603 ip->ip_p = 17; /* UDP */ 1604 ip->ip_sum = 0; 1605 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1606 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1607 ip->udp_src = htons(sport); 1608 ip->udp_dst = htons(dport); 1609 ip->udp_len = htons(8 + len); 1610 ip->udp_xsum = 0; 1611 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1612 } 1613 1614 void copy_filename (uchar *dst, uchar *src, int size) 1615 { 1616 if (*src && (*src == '"')) { 1617 ++src; 1618 --size; 1619 } 1620 1621 while ((--size > 0) && *src && (*src != '"')) { 1622 *dst++ = *src++; 1623 } 1624 *dst = '\0'; 1625 } 1626 1627 #endif /* CFG_CMD_NET */ 1628 1629 void ip_to_string (IPaddr_t x, char *s) 1630 { 1631 x = ntohl (x); 1632 sprintf (s, "%d.%d.%d.%d", 1633 (int) ((x >> 24) & 0xff), 1634 (int) ((x >> 16) & 0xff), 1635 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1636 ); 1637 } 1638 1639 IPaddr_t string_to_ip(char *s) 1640 { 1641 IPaddr_t addr; 1642 char *e; 1643 int i; 1644 1645 if (s == NULL) 1646 return(0); 1647 1648 for (addr=0, i=0; i<4; ++i) { 1649 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1650 addr <<= 8; 1651 addr |= (val & 0xFF); 1652 if (s) { 1653 s = (*e) ? e+1 : e; 1654 } 1655 } 1656 1657 return (htonl(addr)); 1658 } 1659 1660 void VLAN_to_string(ushort x, char *s) 1661 { 1662 x = ntohs(x); 1663 1664 if (x == (ushort)-1) 1665 x = VLAN_NONE; 1666 1667 if (x == VLAN_NONE) 1668 strcpy(s, "none"); 1669 else 1670 sprintf(s, "%d", x & VLAN_IDMASK); 1671 } 1672 1673 ushort string_to_VLAN(char *s) 1674 { 1675 ushort id; 1676 1677 if (s == NULL) 1678 return htons(VLAN_NONE); 1679 1680 if (*s < '0' || *s > '9') 1681 id = VLAN_NONE; 1682 else 1683 id = (ushort)simple_strtoul(s, NULL, 10); 1684 1685 return htons(id); 1686 } 1687 1688 void print_IPaddr (IPaddr_t x) 1689 { 1690 char tmp[16]; 1691 1692 ip_to_string (x, tmp); 1693 1694 puts (tmp); 1695 } 1696 1697 IPaddr_t getenv_IPaddr (char *var) 1698 { 1699 return (string_to_ip(getenv(var))); 1700 } 1701 1702 ushort getenv_VLAN(char *var) 1703 { 1704 return (string_to_VLAN(getenv(var))); 1705 } 1706