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 `NetQuit'. 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) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 507 /* 508 * Echo the inverted link state to the fault LED. 509 */ 510 if(miiphy_link(CFG_FAULT_MII_ADDR)) { 511 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 512 } else { 513 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 514 } 515 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 516 #endif /* CONFIG_MII, ... */ 517 x = timeHandler; 518 timeHandler = (thand_f *)0; 519 (*x)(); 520 } 521 522 523 switch (NetState) { 524 525 case NETLOOP_RESTART: 526 #ifdef CONFIG_NET_MULTI 527 NetRestarted = 1; 528 #endif 529 goto restart; 530 531 case NETLOOP_SUCCESS: 532 if (NetBootFileXferSize > 0) { 533 char buf[10]; 534 printf("Bytes transferred = %ld (%lx hex)\n", 535 NetBootFileXferSize, 536 NetBootFileXferSize); 537 sprintf(buf, "%lx", NetBootFileXferSize); 538 setenv("filesize", buf); 539 540 sprintf(buf, "%lX", (unsigned long)load_addr); 541 setenv("fileaddr", buf); 542 } 543 eth_halt(); 544 return NetBootFileXferSize; 545 546 case NETLOOP_FAIL: 547 return (-1); 548 } 549 } 550 } 551 552 /**********************************************************************/ 553 554 static void 555 startAgainTimeout(void) 556 { 557 NetState = NETLOOP_RESTART; 558 } 559 560 static void 561 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 562 { 563 /* Totally ignore the packet */ 564 } 565 566 void NetStartAgain (void) 567 { 568 #ifdef CONFIG_NET_MULTI 569 DECLARE_GLOBAL_DATA_PTR; 570 #endif 571 char *nretry; 572 int noretry = 0, once = 0; 573 574 if ((nretry = getenv ("netretry")) != NULL) { 575 noretry = (strcmp (nretry, "no") == 0); 576 once = (strcmp (nretry, "once") == 0); 577 } 578 if (noretry) { 579 eth_halt (); 580 NetState = NETLOOP_FAIL; 581 return; 582 } 583 #ifndef CONFIG_NET_MULTI 584 NetSetTimeout (10 * CFG_HZ, startAgainTimeout); 585 NetSetHandler (startAgainHandler); 586 #else /* !CONFIG_NET_MULTI*/ 587 eth_halt (); 588 eth_try_another (!NetRestarted); 589 eth_init (gd->bd); 590 if (NetRestartWrap) { 591 NetRestartWrap = 0; 592 if (NetDevExists && !once) { 593 NetSetTimeout (10 * CFG_HZ, startAgainTimeout); 594 NetSetHandler (startAgainHandler); 595 } else { 596 NetState = NETLOOP_FAIL; 597 } 598 } else { 599 NetState = NETLOOP_RESTART; 600 } 601 #endif /* CONFIG_NET_MULTI */ 602 } 603 604 /**********************************************************************/ 605 /* 606 * Miscelaneous bits. 607 */ 608 609 void 610 NetSetHandler(rxhand_f * f) 611 { 612 packetHandler = f; 613 } 614 615 616 void 617 NetSetTimeout(ulong iv, thand_f * f) 618 { 619 if (iv == 0) { 620 timeHandler = (thand_f *)0; 621 } else { 622 timeHandler = f; 623 timeStart = get_timer(0); 624 timeDelta = iv; 625 } 626 } 627 628 629 void 630 NetSendPacket(volatile uchar * pkt, int len) 631 { 632 (void) eth_send(pkt, len); 633 } 634 635 int 636 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 637 { 638 uchar *pkt; 639 640 /* convert to new style broadcast */ 641 if (dest == 0) 642 dest = 0xFFFFFFFF; 643 644 /* if broadcast, make the ether address a broadcast and don't do ARP */ 645 if (dest == 0xFFFFFFFF) 646 ether = NetBcastAddr; 647 648 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 649 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 650 651 #ifdef ET_DEBUG 652 printf("sending ARP for %08lx\n", dest); 653 #endif 654 NetArpWaitPacketIP = dest; 655 NetArpWaitPacketMAC = ether; 656 657 pkt = NetArpWaitTxPacket; 658 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 659 660 NetSetIP (pkt, dest, dport, sport, len); 661 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 662 663 /* size of the waiting packet */ 664 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 665 666 /* and do the ARP request */ 667 NetArpWaitTry = 1; 668 NetArpWaitTimerStart = get_timer(0); 669 ArpRequest(); 670 return 1; /* waiting */ 671 } 672 673 #ifdef ET_DEBUG 674 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", 675 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 676 #endif 677 678 pkt = (uchar *)NetTxPacket; 679 pkt += NetSetEther (pkt, ether, PROT_IP); 680 NetSetIP (pkt, dest, dport, sport, len); 681 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 682 683 return 0; /* transmitted */ 684 } 685 686 #if (CONFIG_COMMANDS & CFG_CMD_PING) 687 static ushort PingSeqNo; 688 689 int PingSend(void) 690 { 691 static uchar mac[6]; 692 volatile IP_t *ip; 693 volatile ushort *s; 694 uchar *pkt; 695 696 /* XXX always send arp request */ 697 698 memcpy(mac, NetEtherNullAddr, 6); 699 700 #ifdef ET_DEBUG 701 printf("sending ARP for %08lx\n", NetPingIP); 702 #endif 703 704 NetArpWaitPacketIP = NetPingIP; 705 NetArpWaitPacketMAC = mac; 706 707 pkt = NetArpWaitTxPacket; 708 pkt += NetSetEther(pkt, mac, PROT_IP); 709 710 ip = (volatile IP_t *)pkt; 711 712 /* 713 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 714 */ 715 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 716 ip->ip_tos = 0; 717 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 718 ip->ip_id = htons(NetIPID++); 719 ip->ip_off = htons(0x4000); /* No fragmentation */ 720 ip->ip_ttl = 255; 721 ip->ip_p = 0x01; /* ICMP */ 722 ip->ip_sum = 0; 723 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 724 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 725 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 726 727 s = &ip->udp_src; /* XXX ICMP starts here */ 728 s[0] = htons(0x0800); /* echo-request, code */ 729 s[1] = 0; /* checksum */ 730 s[2] = 0; /* identifier */ 731 s[3] = htons(PingSeqNo++); /* sequence number */ 732 s[1] = ~NetCksum((uchar *)s, 8/2); 733 734 /* size of the waiting packet */ 735 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 736 737 /* and do the ARP request */ 738 NetArpWaitTry = 1; 739 NetArpWaitTimerStart = get_timer(0); 740 ArpRequest(); 741 return 1; /* waiting */ 742 } 743 744 static void 745 PingTimeout (void) 746 { 747 eth_halt(); 748 NetState = NETLOOP_FAIL; /* we did not get the reply */ 749 } 750 751 static void 752 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 753 { 754 IPaddr_t tmp; 755 volatile IP_t *ip = (volatile IP_t *)pkt; 756 757 tmp = NetReadIP((void *)&ip->ip_src); 758 if (tmp != NetPingIP) 759 return; 760 761 NetState = NETLOOP_SUCCESS; 762 } 763 764 static void PingStart(void) 765 { 766 #if defined(CONFIG_NET_MULTI) 767 printf ("Using %s device\n", eth_get_name()); 768 #endif /* CONFIG_NET_MULTI */ 769 NetSetTimeout (10 * CFG_HZ, PingTimeout); 770 NetSetHandler (PingHandler); 771 772 PingSend(); 773 } 774 #endif /* CFG_CMD_PING */ 775 776 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 777 778 #define CDP_DEVICE_ID_TLV 0x0001 779 #define CDP_ADDRESS_TLV 0x0002 780 #define CDP_PORT_ID_TLV 0x0003 781 #define CDP_CAPABILITIES_TLV 0x0004 782 #define CDP_VERSION_TLV 0x0005 783 #define CDP_PLATFORM_TLV 0x0006 784 #define CDP_NATIVE_VLAN_TLV 0x000a 785 #define CDP_APPLIANCE_VLAN_TLV 0x000e 786 #define CDP_TRIGGER_TLV 0x000f 787 #define CDP_POWER_CONSUMPTION_TLV 0x0010 788 #define CDP_SYSNAME_TLV 0x0014 789 #define CDP_SYSOBJECT_TLV 0x0015 790 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 791 792 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */ 793 794 static int CDPSeq; 795 static int CDPOK; 796 797 ushort CDPNativeVLAN; 798 ushort CDPApplianceVLAN; 799 800 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 801 802 static ushort CDP_compute_csum(const uchar *buff, ushort len) 803 { 804 ushort csum; 805 int odd; 806 ulong result = 0; 807 ushort leftover; 808 809 if (len > 0) { 810 odd = 1 & (ulong)buff; 811 if (odd) { 812 result = *buff << 8; 813 len--; 814 buff++; 815 } 816 while (len > 1) { 817 result += *((const ushort *)buff)++; 818 if (result & 0x80000000) 819 result = (result & 0xFFFF) + (result >> 16); 820 len -= 2; 821 } 822 if (len) { 823 leftover = (signed short)(*(const signed char *)buff); 824 /* * XXX CISCO SUCKS big time! (and blows too) */ 825 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 826 } 827 while (result >> 16) 828 result = (result & 0xFFFF) + (result >> 16); 829 830 if (odd) 831 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 832 } 833 834 /* add up 16-bit and 17-bit words for 17+c bits */ 835 result = (result & 0xffff) + (result >> 16); 836 /* add up 16-bit and 2-bit for 16+c bit */ 837 result = (result & 0xffff) + (result >> 16); 838 /* add up carry.. */ 839 result = (result & 0xffff) + (result >> 16); 840 841 /* negate */ 842 csum = ~(ushort)result; 843 844 /* run time endian detection */ 845 if (csum != htons(csum)) /* little endian */ 846 csum = htons(csum); 847 848 return csum; 849 } 850 851 int CDPSendTrigger(void) 852 { 853 volatile uchar *pkt; 854 volatile ushort *s; 855 volatile ushort *cp; 856 Ethernet_t *et; 857 int len; 858 ushort chksum; 859 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 860 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 861 char buf[32]; 862 #endif 863 864 pkt = NetTxPacket; 865 et = (Ethernet_t *)pkt; 866 867 /* NOTE: trigger sent not on any VLAN */ 868 869 /* form ethernet header */ 870 memcpy(et->et_dest, NetCDPAddr, 6); 871 memcpy(et->et_src, NetOurEther, 6); 872 873 pkt += ETHER_HDR_SIZE; 874 875 /* SNAP header */ 876 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 877 pkt += sizeof(CDP_SNAP_hdr); 878 879 /* CDP header */ 880 *pkt++ = 0x02; /* CDP version 2 */ 881 *pkt++ = 180; /* TTL */ 882 s = (volatile ushort *)pkt; 883 cp = s; 884 *s++ = htons(0); /* checksum (0 for later calculation) */ 885 886 /* CDP fields */ 887 #ifdef CONFIG_CDP_DEVICE_ID 888 *s++ = htons(CDP_DEVICE_ID_TLV); 889 *s++ = htons(CONFIG_CDP_DEVICE_ID); 890 memset(buf, 0, sizeof(buf)); 891 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 892 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 893 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 894 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 895 memcpy((uchar *)s, buf, 16); 896 s += 16 / 2; 897 #endif 898 899 #ifdef CONFIG_CDP_PORT_ID 900 *s++ = htons(CDP_PORT_ID_TLV); 901 memset(buf, 0, sizeof(buf)); 902 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 903 len = strlen(buf); 904 if (len & 1) /* make it even */ 905 len++; 906 *s++ = htons(len + 4); 907 memcpy((uchar *)s, buf, len); 908 s += len / 2; 909 #endif 910 911 #ifdef CONFIG_CDP_CAPABILITIES 912 *s++ = htons(CDP_CAPABILITIES_TLV); 913 *s++ = htons(8); 914 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 915 s += 2; 916 #endif 917 918 #ifdef CONFIG_CDP_VERSION 919 *s++ = htons(CDP_VERSION_TLV); 920 memset(buf, 0, sizeof(buf)); 921 strcpy(buf, CONFIG_CDP_VERSION); 922 len = strlen(buf); 923 if (len & 1) /* make it even */ 924 len++; 925 *s++ = htons(len + 4); 926 memcpy((uchar *)s, buf, len); 927 s += len / 2; 928 #endif 929 930 #ifdef CONFIG_CDP_PLATFORM 931 *s++ = htons(CDP_PLATFORM_TLV); 932 memset(buf, 0, sizeof(buf)); 933 strcpy(buf, CONFIG_CDP_PLATFORM); 934 len = strlen(buf); 935 if (len & 1) /* make it even */ 936 len++; 937 *s++ = htons(len + 4); 938 memcpy((uchar *)s, buf, len); 939 s += len / 2; 940 #endif 941 942 #ifdef CONFIG_CDP_TRIGGER 943 *s++ = htons(CDP_TRIGGER_TLV); 944 *s++ = htons(8); 945 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 946 s += 2; 947 #endif 948 949 #ifdef CONFIG_CDP_POWER_CONSUMPTION 950 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 951 *s++ = htons(6); 952 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 953 #endif 954 955 /* length of ethernet packet */ 956 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 957 et->et_protlen = htons(len); 958 959 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 960 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 961 if (chksum == 0) 962 chksum = 0xFFFF; 963 *cp = htons(chksum); 964 965 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 966 return 0; 967 } 968 969 static void 970 CDPTimeout (void) 971 { 972 CDPSeq++; 973 974 if (CDPSeq < 3) { 975 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 976 CDPSendTrigger(); 977 return; 978 } 979 980 /* if not OK try again */ 981 if (!CDPOK) 982 NetStartAgain(); 983 else 984 NetState = NETLOOP_SUCCESS; 985 } 986 987 static void 988 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 989 { 990 /* nothing */ 991 } 992 993 static void 994 CDPHandler(const uchar * pkt, unsigned len) 995 { 996 const uchar *t; 997 const ushort *ss; 998 ushort type, tlen; 999 uchar applid; 1000 ushort vlan, nvlan; 1001 1002 /* minimum size? */ 1003 if (len < sizeof(CDP_SNAP_hdr) + 4) 1004 goto pkt_short; 1005 1006 /* check for valid CDP SNAP header */ 1007 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1008 return; 1009 1010 pkt += sizeof(CDP_SNAP_hdr); 1011 len -= sizeof(CDP_SNAP_hdr); 1012 1013 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1014 if (pkt[0] < 0x02 || pkt[1] == 0) 1015 return; 1016 1017 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1018 if (pkt[0] != 0x02) 1019 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1020 pkt[0] & 0xff); 1021 1022 if (CDP_compute_csum(pkt, len) != 0) 1023 return; 1024 1025 pkt += 4; 1026 len -= 4; 1027 1028 vlan = htons(-1); 1029 nvlan = htons(-1); 1030 while (len > 0) { 1031 if (len < 4) 1032 goto pkt_short; 1033 1034 ss = (const ushort *)pkt; 1035 type = ntohs(ss[0]); 1036 tlen = ntohs(ss[1]); 1037 if (tlen > len) { 1038 goto pkt_short; 1039 } 1040 1041 pkt += tlen; 1042 len -= tlen; 1043 1044 ss += 2; /* point ss to the data of the TLV */ 1045 tlen -= 4; 1046 1047 switch (type) { 1048 case CDP_DEVICE_ID_TLV: 1049 break; 1050 case CDP_ADDRESS_TLV: 1051 break; 1052 case CDP_PORT_ID_TLV: 1053 break; 1054 case CDP_CAPABILITIES_TLV: 1055 break; 1056 case CDP_VERSION_TLV: 1057 break; 1058 case CDP_PLATFORM_TLV: 1059 break; 1060 case CDP_NATIVE_VLAN_TLV: 1061 nvlan = *ss; 1062 break; 1063 case CDP_APPLIANCE_VLAN_TLV: 1064 t = (const uchar *)ss; 1065 while (tlen > 0) { 1066 if (tlen < 3) 1067 goto pkt_short; 1068 1069 applid = t[0]; 1070 ss = (const ushort *)(t + 1); 1071 1072 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1073 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1074 vlan = *ss; 1075 #else 1076 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1077 #endif 1078 t += 3; tlen -= 3; 1079 } 1080 break; 1081 case CDP_TRIGGER_TLV: 1082 break; 1083 case CDP_POWER_CONSUMPTION_TLV: 1084 break; 1085 case CDP_SYSNAME_TLV: 1086 break; 1087 case CDP_SYSOBJECT_TLV: 1088 break; 1089 case CDP_MANAGEMENT_ADDRESS_TLV: 1090 break; 1091 } 1092 } 1093 1094 CDPApplianceVLAN = vlan; 1095 CDPNativeVLAN = nvlan; 1096 1097 CDPOK = 1; 1098 return; 1099 1100 pkt_short: 1101 printf("** CDP packet is too short\n"); 1102 return; 1103 } 1104 1105 static void CDPStart(void) 1106 { 1107 #if defined(CONFIG_NET_MULTI) 1108 printf ("Using %s device\n", eth_get_name()); 1109 #endif 1110 CDPSeq = 0; 1111 CDPOK = 0; 1112 1113 CDPNativeVLAN = htons(-1); 1114 CDPApplianceVLAN = htons(-1); 1115 1116 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1117 NetSetHandler (CDPDummyHandler); 1118 1119 CDPSendTrigger(); 1120 } 1121 #endif /* CFG_CMD_CDP */ 1122 1123 1124 void 1125 NetReceive(volatile uchar * inpkt, int len) 1126 { 1127 Ethernet_t *et; 1128 IP_t *ip; 1129 ARP_t *arp; 1130 IPaddr_t tmp; 1131 int x; 1132 uchar *pkt; 1133 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1134 int iscdp; 1135 #endif 1136 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1137 1138 #ifdef ET_DEBUG 1139 printf("packet received\n"); 1140 #endif 1141 1142 NetRxPkt = inpkt; 1143 NetRxPktLen = len; 1144 et = (Ethernet_t *)inpkt; 1145 1146 /* too small packet? */ 1147 if (len < ETHER_HDR_SIZE) 1148 return; 1149 1150 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1151 /* keep track if packet is CDP */ 1152 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1153 #endif 1154 1155 myvlanid = ntohs(NetOurVLAN); 1156 if (myvlanid == (ushort)-1) 1157 myvlanid = VLAN_NONE; 1158 mynvlanid = ntohs(NetOurNativeVLAN); 1159 if (mynvlanid == (ushort)-1) 1160 mynvlanid = VLAN_NONE; 1161 1162 x = ntohs(et->et_protlen); 1163 1164 #ifdef ET_DEBUG 1165 printf("packet received\n"); 1166 #endif 1167 1168 if (x < 1514) { 1169 /* 1170 * Got a 802 packet. Check the other protocol field. 1171 */ 1172 x = ntohs(et->et_prot); 1173 1174 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1175 len -= E802_HDR_SIZE; 1176 1177 } else if (x != PROT_VLAN) { /* normal packet */ 1178 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1179 len -= ETHER_HDR_SIZE; 1180 1181 } else { /* VLAN packet */ 1182 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1183 1184 #ifdef ET_DEBUG 1185 printf("VLAN packet received\n"); 1186 #endif 1187 /* too small packet? */ 1188 if (len < VLAN_ETHER_HDR_SIZE) 1189 return; 1190 1191 /* if no VLAN active */ 1192 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1193 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1194 && iscdp == 0 1195 #endif 1196 ) 1197 return; 1198 1199 cti = ntohs(vet->vet_tag); 1200 vlanid = cti & VLAN_IDMASK; 1201 x = ntohs(vet->vet_type); 1202 1203 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1204 len -= VLAN_ETHER_HDR_SIZE; 1205 } 1206 1207 #ifdef ET_DEBUG 1208 printf("Receive from protocol 0x%x\n", x); 1209 #endif 1210 1211 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1212 if (iscdp) { 1213 CDPHandler((uchar *)ip, len); 1214 return; 1215 } 1216 #endif 1217 1218 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1219 if (vlanid == VLAN_NONE) 1220 vlanid = (mynvlanid & VLAN_IDMASK); 1221 /* not matched? */ 1222 if (vlanid != (myvlanid & VLAN_IDMASK)) 1223 return; 1224 } 1225 1226 switch (x) { 1227 1228 case PROT_ARP: 1229 /* 1230 * We have to deal with two types of ARP packets: 1231 * - REQUEST packets will be answered by sending our 1232 * IP address - if we know it. 1233 * - REPLY packates are expected only after we asked 1234 * for the TFTP server's or the gateway's ethernet 1235 * address; so if we receive such a packet, we set 1236 * the server ethernet address 1237 */ 1238 #ifdef ET_DEBUG 1239 puts ("Got ARP\n"); 1240 #endif 1241 arp = (ARP_t *)ip; 1242 if (len < ARP_HDR_SIZE) { 1243 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1244 return; 1245 } 1246 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1247 return; 1248 } 1249 if (ntohs(arp->ar_pro) != PROT_IP) { 1250 return; 1251 } 1252 if (arp->ar_hln != 6) { 1253 return; 1254 } 1255 if (arp->ar_pln != 4) { 1256 return; 1257 } 1258 1259 if (NetOurIP == 0) { 1260 return; 1261 } 1262 1263 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1264 return; 1265 } 1266 1267 switch (ntohs(arp->ar_op)) { 1268 case ARPOP_REQUEST: /* reply with our IP address */ 1269 #ifdef ET_DEBUG 1270 puts ("Got ARP REQUEST, return our IP\n"); 1271 #endif 1272 pkt = (uchar *)et; 1273 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1274 arp->ar_op = htons(ARPOP_REPLY); 1275 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1276 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1277 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1278 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1279 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1280 return; 1281 1282 case ARPOP_REPLY: /* arp reply */ 1283 /* are we waiting for a reply */ 1284 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1285 break; 1286 #ifdef ET_DEBUG 1287 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1288 arp->ar_data[0], arp->ar_data[1], 1289 arp->ar_data[2], arp->ar_data[3], 1290 arp->ar_data[4], arp->ar_data[5]); 1291 #endif 1292 1293 tmp = NetReadIP(&arp->ar_data[6]); 1294 1295 /* matched waiting packet's address */ 1296 if (tmp == NetArpWaitReplyIP) { 1297 #ifdef ET_DEBUG 1298 puts ("Got it\n"); 1299 #endif 1300 /* save address for later use */ 1301 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1302 1303 #ifdef CONFIG_NETCONSOLE 1304 (*packetHandler)(0,0,0,0); 1305 #endif 1306 /* modify header, and transmit it */ 1307 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1308 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1309 1310 /* no arp request pending now */ 1311 NetArpWaitPacketIP = 0; 1312 NetArpWaitTxPacketSize = 0; 1313 NetArpWaitPacketMAC = NULL; 1314 1315 } 1316 return; 1317 default: 1318 #ifdef ET_DEBUG 1319 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1320 #endif 1321 return; 1322 } 1323 break; 1324 1325 case PROT_RARP: 1326 #ifdef ET_DEBUG 1327 puts ("Got RARP\n"); 1328 #endif 1329 arp = (ARP_t *)ip; 1330 if (len < ARP_HDR_SIZE) { 1331 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1332 return; 1333 } 1334 1335 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1336 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1337 (ntohs(arp->ar_pro) != PROT_IP) || 1338 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1339 1340 puts ("invalid RARP header\n"); 1341 } else { 1342 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1343 if (NetServerIP == 0) 1344 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1345 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1346 1347 (*packetHandler)(0,0,0,0); 1348 } 1349 break; 1350 1351 case PROT_IP: 1352 #ifdef ET_DEBUG 1353 puts ("Got IP\n"); 1354 #endif 1355 if (len < IP_HDR_SIZE) { 1356 debug ("len bad %d < %d\n", len, IP_HDR_SIZE); 1357 return; 1358 } 1359 if (len < ntohs(ip->ip_len)) { 1360 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1361 return; 1362 } 1363 len = ntohs(ip->ip_len); 1364 #ifdef ET_DEBUG 1365 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1366 #endif 1367 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1368 return; 1369 } 1370 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ 1371 return; 1372 } 1373 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1374 puts ("checksum bad\n"); 1375 return; 1376 } 1377 tmp = NetReadIP(&ip->ip_dst); 1378 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1379 return; 1380 } 1381 /* 1382 * watch for ICMP host redirects 1383 * 1384 * There is no real handler code (yet). We just watch 1385 * for ICMP host redirect messages. In case anybody 1386 * sees these messages: please contact me 1387 * (wd@denx.de), or - even better - send me the 1388 * necessary fixes :-) 1389 * 1390 * Note: in all cases where I have seen this so far 1391 * it was a problem with the router configuration, 1392 * for instance when a router was configured in the 1393 * BOOTP reply, but the TFTP server was on the same 1394 * subnet. So this is probably a warning that your 1395 * configuration might be wrong. But I'm not really 1396 * sure if there aren't any other situations. 1397 */ 1398 if (ip->ip_p == IPPROTO_ICMP) { 1399 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1400 1401 switch (icmph->type) { 1402 case ICMP_REDIRECT: 1403 if (icmph->code != ICMP_REDIR_HOST) 1404 return; 1405 puts (" ICMP Host Redirect to "); 1406 print_IPaddr(icmph->un.gateway); 1407 putc(' '); 1408 break; 1409 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1410 case ICMP_ECHO_REPLY: 1411 /* 1412 * IP header OK. Pass the packet to the current handler. 1413 */ 1414 /* XXX point to ip packet */ 1415 (*packetHandler)((uchar *)ip, 0, 0, 0); 1416 break; 1417 #endif 1418 default: 1419 return; 1420 } 1421 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1422 return; 1423 } 1424 1425 #ifdef CONFIG_NETCONSOLE 1426 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1427 ntohs(ip->udp_dst), 1428 ntohs(ip->udp_src), 1429 ntohs(ip->udp_len) - 8); 1430 #endif 1431 /* 1432 * IP header OK. Pass the packet to the current handler. 1433 */ 1434 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1435 ntohs(ip->udp_dst), 1436 ntohs(ip->udp_src), 1437 ntohs(ip->udp_len) - 8); 1438 break; 1439 } 1440 } 1441 1442 1443 /**********************************************************************/ 1444 1445 static int net_check_prereq (proto_t protocol) 1446 { 1447 switch (protocol) { 1448 /* Fall through */ 1449 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1450 case PING: 1451 if (NetPingIP == 0) { 1452 puts ("*** ERROR: ping address not given\n"); 1453 return (1); 1454 } 1455 goto common; 1456 #endif 1457 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 1458 case SNTP: 1459 if (NetNtpServerIP == 0) { 1460 puts ("*** ERROR: NTP server address not given\n"); 1461 return (1); 1462 } 1463 goto common; 1464 #endif 1465 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 1466 case NFS: 1467 #endif 1468 case NETCONS: 1469 case TFTP: 1470 if (NetServerIP == 0) { 1471 puts ("*** ERROR: `serverip' not set\n"); 1472 return (1); 1473 } 1474 #if (CONFIG_COMMANDS & (CFG_CMD_PING | CFG_CMD_SNTP)) 1475 common: 1476 #endif 1477 1478 if (NetOurIP == 0) { 1479 puts ("*** ERROR: `ipaddr' not set\n"); 1480 return (1); 1481 } 1482 /* Fall through */ 1483 1484 case DHCP: 1485 case RARP: 1486 case BOOTP: 1487 case CDP: 1488 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1489 #ifdef CONFIG_NET_MULTI 1490 extern int eth_get_dev_index (void); 1491 int num = eth_get_dev_index (); 1492 1493 switch (num) { 1494 case -1: 1495 puts ("*** ERROR: No ethernet found.\n"); 1496 return (1); 1497 case 0: 1498 puts ("*** ERROR: `ethaddr' not set\n"); 1499 break; 1500 default: 1501 printf ("*** ERROR: `eth%daddr' not set\n", 1502 num); 1503 break; 1504 } 1505 1506 NetStartAgain (); 1507 return (2); 1508 #else 1509 puts ("*** ERROR: `ethaddr' not set\n"); 1510 return (1); 1511 #endif 1512 } 1513 /* Fall through */ 1514 default: 1515 return (0); 1516 } 1517 return (0); /* OK */ 1518 } 1519 /**********************************************************************/ 1520 1521 int 1522 NetCksumOk(uchar * ptr, int len) 1523 { 1524 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1525 } 1526 1527 1528 unsigned 1529 NetCksum(uchar * ptr, int len) 1530 { 1531 ulong xsum; 1532 1533 xsum = 0; 1534 while (len-- > 0) 1535 xsum += *((ushort *)ptr)++; 1536 xsum = (xsum & 0xffff) + (xsum >> 16); 1537 xsum = (xsum & 0xffff) + (xsum >> 16); 1538 return (xsum & 0xffff); 1539 } 1540 1541 int 1542 NetEthHdrSize(void) 1543 { 1544 ushort myvlanid; 1545 1546 myvlanid = ntohs(NetOurVLAN); 1547 if (myvlanid == (ushort)-1) 1548 myvlanid = VLAN_NONE; 1549 1550 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1551 } 1552 1553 int 1554 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1555 { 1556 Ethernet_t *et = (Ethernet_t *)xet; 1557 ushort myvlanid; 1558 1559 myvlanid = ntohs(NetOurVLAN); 1560 if (myvlanid == (ushort)-1) 1561 myvlanid = VLAN_NONE; 1562 1563 memcpy (et->et_dest, addr, 6); 1564 memcpy (et->et_src, NetOurEther, 6); 1565 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1566 et->et_protlen = htons(prot); 1567 return ETHER_HDR_SIZE; 1568 } else { 1569 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1570 1571 vet->vet_vlan_type = htons(PROT_VLAN); 1572 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1573 vet->vet_type = htons(prot); 1574 return VLAN_ETHER_HDR_SIZE; 1575 } 1576 } 1577 1578 void 1579 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1580 { 1581 volatile IP_t *ip = (IP_t *)xip; 1582 1583 /* 1584 * If the data is an odd number of bytes, zero the 1585 * byte after the last byte so that the checksum 1586 * will work. 1587 */ 1588 if (len & 1) 1589 xip[IP_HDR_SIZE + len] = 0; 1590 1591 /* 1592 * Construct an IP and UDP header. 1593 * (need to set no fragment bit - XXX) 1594 */ 1595 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1596 ip->ip_tos = 0; 1597 ip->ip_len = htons(IP_HDR_SIZE + len); 1598 ip->ip_id = htons(NetIPID++); 1599 ip->ip_off = htons(0x4000); /* No fragmentation */ 1600 ip->ip_ttl = 255; 1601 ip->ip_p = 17; /* UDP */ 1602 ip->ip_sum = 0; 1603 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1604 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1605 ip->udp_src = htons(sport); 1606 ip->udp_dst = htons(dport); 1607 ip->udp_len = htons(8 + len); 1608 ip->udp_xsum = 0; 1609 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1610 } 1611 1612 void copy_filename (uchar *dst, uchar *src, int size) 1613 { 1614 if (*src && (*src == '"')) { 1615 ++src; 1616 --size; 1617 } 1618 1619 while ((--size > 0) && *src && (*src != '"')) { 1620 *dst++ = *src++; 1621 } 1622 *dst = '\0'; 1623 } 1624 1625 #endif /* CFG_CMD_NET */ 1626 1627 void ip_to_string (IPaddr_t x, char *s) 1628 { 1629 x = ntohl (x); 1630 sprintf (s, "%d.%d.%d.%d", 1631 (int) ((x >> 24) & 0xff), 1632 (int) ((x >> 16) & 0xff), 1633 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1634 ); 1635 } 1636 1637 IPaddr_t string_to_ip(char *s) 1638 { 1639 IPaddr_t addr; 1640 char *e; 1641 int i; 1642 1643 if (s == NULL) 1644 return(0); 1645 1646 for (addr=0, i=0; i<4; ++i) { 1647 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1648 addr <<= 8; 1649 addr |= (val & 0xFF); 1650 if (s) { 1651 s = (*e) ? e+1 : e; 1652 } 1653 } 1654 1655 return (htonl(addr)); 1656 } 1657 1658 void VLAN_to_string(ushort x, char *s) 1659 { 1660 x = ntohs(x); 1661 1662 if (x == (ushort)-1) 1663 x = VLAN_NONE; 1664 1665 if (x == VLAN_NONE) 1666 strcpy(s, "none"); 1667 else 1668 sprintf(s, "%d", x & VLAN_IDMASK); 1669 } 1670 1671 ushort string_to_VLAN(char *s) 1672 { 1673 ushort id; 1674 1675 if (s == NULL) 1676 return htons(VLAN_NONE); 1677 1678 if (*s < '0' || *s > '9') 1679 id = VLAN_NONE; 1680 else 1681 id = (ushort)simple_strtoul(s, NULL, 10); 1682 1683 return htons(id); 1684 } 1685 1686 void print_IPaddr (IPaddr_t x) 1687 { 1688 char tmp[16]; 1689 1690 ip_to_string (x, tmp); 1691 1692 puts (tmp); 1693 } 1694 1695 IPaddr_t getenv_IPaddr (char *var) 1696 { 1697 return (string_to_ip(getenv(var))); 1698 } 1699 1700 ushort getenv_VLAN(char *var) 1701 { 1702 return (string_to_VLAN(getenv(var))); 1703 } 1704