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 69 70 #include <common.h> 71 #include <watchdog.h> 72 #include <command.h> 73 #include <net.h> 74 #include "bootp.h" 75 #include "tftp.h" 76 #include "rarp.h" 77 #include "nfs.h" 78 #ifdef CONFIG_STATUS_LED 79 #include <status_led.h> 80 #include <miiphy.h> 81 #endif 82 83 #if (CONFIG_COMMANDS & CFG_CMD_NET) 84 85 #define ARP_TIMEOUT 5 /* Seconds before trying ARP again */ 86 #ifndef CONFIG_NET_RETRY_COUNT 87 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 88 #else 89 # define ARP_TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) 90 #endif 91 92 #if 0 93 #define ET_DEBUG 94 #endif 95 96 /** BOOTP EXTENTIONS **/ 97 98 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 99 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 100 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 101 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2) 102 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 103 #endif 104 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 105 char NetOurHostName[32]={0,}; /* Our hostname */ 106 char NetOurRootPath[64]={0,}; /* Our bootpath */ 107 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 108 109 /** END OF BOOTP EXTENTIONS **/ 110 111 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 112 uchar NetOurEther[6]; /* Our ethernet address */ 113 uchar NetServerEther[6] = /* Boot server enet address */ 114 { 0, 0, 0, 0, 0, 0 }; 115 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 116 IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */ 117 volatile uchar *NetRxPkt; /* Current receive packet */ 118 int NetRxPktLen; /* Current rx packet length */ 119 unsigned NetIPID; /* IP packet ID */ 120 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 121 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 122 uchar NetEtherNullAddr[6] = 123 { 0, 0, 0, 0, 0, 0 }; 124 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 125 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 126 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 127 #endif 128 int NetState; /* Network loop state */ 129 #ifdef CONFIG_NET_MULTI 130 int NetRestartWrap = 0; /* Tried all network devices */ 131 static int NetRestarted = 0; /* Network loop restarted */ 132 static int NetDevExists = 0; /* At least one device configured */ 133 #endif 134 135 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 136 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 137 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 138 139 char BootFile[128]; /* Boot File name */ 140 141 #if (CONFIG_COMMANDS & CFG_CMD_PING) 142 IPaddr_t NetPingIP; /* the ip address to ping */ 143 144 static void PingStart(void); 145 #endif 146 147 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 148 static void CDPStart(void); 149 #endif 150 151 #ifdef CONFIG_NETCONSOLE 152 void NcStart(void); 153 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 154 #endif 155 156 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 157 158 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 159 160 static rxhand_f *packetHandler; /* Current RX packet handler */ 161 static thand_f *timeHandler; /* Current timeout handler */ 162 static ulong timeStart; /* Time base value */ 163 static ulong timeDelta; /* Current timeout value */ 164 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 165 166 static int net_check_prereq (proto_t protocol); 167 168 /**********************************************************************/ 169 170 IPaddr_t NetArpWaitPacketIP; 171 IPaddr_t NetArpWaitReplyIP; 172 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 173 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 174 int NetArpWaitTxPacketSize; 175 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 176 ulong NetArpWaitTimerStart; 177 int NetArpWaitTry; 178 179 void ArpRequest (void) 180 { 181 int i; 182 volatile uchar *pkt; 183 ARP_t *arp; 184 185 #ifdef ET_DEBUG 186 printf ("ARP broadcast %d\n", NetArpWaitTry); 187 #endif 188 pkt = NetTxPacket; 189 190 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 191 192 arp = (ARP_t *) pkt; 193 194 arp->ar_hrd = htons (ARP_ETHER); 195 arp->ar_pro = htons (PROT_IP); 196 arp->ar_hln = 6; 197 arp->ar_pln = 4; 198 arp->ar_op = htons (ARPOP_REQUEST); 199 200 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 201 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 202 for (i = 10; i < 16; ++i) { 203 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 204 } 205 206 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 207 (NetOurIP & NetOurSubnetMask)) { 208 if (NetOurGatewayIP == 0) { 209 puts ("## Warning: gatewayip needed but not set\n"); 210 } 211 NetArpWaitReplyIP = NetOurGatewayIP; 212 } else { 213 NetArpWaitReplyIP = NetArpWaitPacketIP; 214 } 215 216 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 217 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 218 } 219 220 void ArpTimeoutCheck(void) 221 { 222 ulong t; 223 224 if (!NetArpWaitPacketIP) 225 return; 226 227 t = get_timer(0); 228 229 /* check for arp timeout */ 230 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) { 231 NetArpWaitTry++; 232 233 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 234 puts ("\nARP Retry count exceeded; starting again\n"); 235 NetArpWaitTry = 0; 236 NetStartAgain(); 237 } else { 238 NetArpWaitTimerStart = t; 239 ArpRequest(); 240 } 241 } 242 } 243 244 /**********************************************************************/ 245 /* 246 * Main network processing loop. 247 */ 248 249 int 250 NetLoop(proto_t protocol) 251 { 252 DECLARE_GLOBAL_DATA_PTR; 253 254 bd_t *bd = gd->bd; 255 256 #ifdef CONFIG_NET_MULTI 257 NetRestarted = 0; 258 NetDevExists = 0; 259 #endif 260 261 /* XXX problem with bss workaround */ 262 NetArpWaitPacketMAC = NULL; 263 NetArpWaitTxPacket = NULL; 264 NetArpWaitPacketIP = 0; 265 NetArpWaitReplyIP = 0; 266 NetArpWaitTxPacket = NULL; 267 NetTxPacket = NULL; 268 269 if (!NetTxPacket) { 270 int i; 271 /* 272 * Setup packet buffers, aligned correctly. 273 */ 274 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 275 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 276 for (i = 0; i < PKTBUFSRX; i++) { 277 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 278 } 279 } 280 281 if (!NetArpWaitTxPacket) { 282 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 283 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 284 NetArpWaitTxPacketSize = 0; 285 } 286 287 eth_halt(); 288 #ifdef CONFIG_NET_MULTI 289 eth_set_current(); 290 #endif 291 if (eth_init(bd) < 0) 292 return(-1); 293 294 restart: 295 #ifdef CONFIG_NET_MULTI 296 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 297 #else 298 memcpy (NetOurEther, bd->bi_enetaddr, 6); 299 #endif 300 301 NetState = NETLOOP_CONTINUE; 302 303 /* 304 * Start the ball rolling with the given start function. From 305 * here on, this code is a state machine driven by received 306 * packets and timer events. 307 */ 308 309 switch (protocol) { 310 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 311 case NFS: 312 #endif 313 #if (CONFIG_COMMANDS & CFG_CMD_PING) 314 case PING: 315 #endif 316 case NETCONS: 317 case TFTP: 318 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 319 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 320 NetOurSubnetMask= getenv_IPaddr ("netmask"); 321 NetOurVLAN = getenv_VLAN("vlan"); 322 NetOurNativeVLAN = getenv_VLAN("nvlan"); 323 324 switch (protocol) { 325 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 326 case NFS: 327 #endif 328 case NETCONS: 329 case TFTP: 330 NetServerIP = getenv_IPaddr ("serverip"); 331 break; 332 #if (CONFIG_COMMANDS & CFG_CMD_PING) 333 case PING: 334 /* nothing */ 335 break; 336 #endif 337 default: 338 break; 339 } 340 341 break; 342 case BOOTP: 343 case RARP: 344 /* 345 * initialize our IP addr to 0 in order to accept ANY 346 * IP addr assigned to us by the BOOTP / RARP server 347 */ 348 NetOurIP = 0; 349 NetServerIP = getenv_IPaddr ("serverip"); 350 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 351 NetOurNativeVLAN = getenv_VLAN("nvlan"); 352 case CDP: 353 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 354 NetOurNativeVLAN = getenv_VLAN("nvlan"); 355 break; 356 default: 357 break; 358 } 359 360 switch (net_check_prereq (protocol)) { 361 case 1: 362 /* network not configured */ 363 return (-1); 364 365 #ifdef CONFIG_NET_MULTI 366 case 2: 367 /* network device not configured */ 368 break; 369 #endif /* CONFIG_NET_MULTI */ 370 371 case 0: 372 #ifdef CONFIG_NET_MULTI 373 NetDevExists = 1; 374 #endif 375 switch (protocol) { 376 case TFTP: 377 /* always use ARP to get server ethernet address */ 378 TftpStart(); 379 break; 380 381 #if (CONFIG_COMMANDS & CFG_CMD_DHCP) 382 case DHCP: 383 /* Start with a clean slate... */ 384 NetOurIP = 0; 385 NetServerIP = getenv_IPaddr ("serverip"); 386 DhcpRequest(); /* Basically same as BOOTP */ 387 break; 388 #endif /* CFG_CMD_DHCP */ 389 390 case BOOTP: 391 BootpTry = 0; 392 BootpRequest (); 393 break; 394 395 case RARP: 396 RarpTry = 0; 397 RarpRequest (); 398 break; 399 #if (CONFIG_COMMANDS & CFG_CMD_PING) 400 case PING: 401 PingStart(); 402 break; 403 #endif 404 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 405 case NFS: 406 NfsStart(); 407 break; 408 #endif 409 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 410 case CDP: 411 CDPStart(); 412 break; 413 #endif 414 #ifdef CONFIG_NETCONSOLE 415 case NETCONS: 416 NcStart(); 417 break; 418 #endif 419 default: 420 break; 421 } 422 423 NetBootFileXferSize = 0; 424 break; 425 } 426 427 #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII) 428 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 429 /* 430 * Echo the inverted link state to the fault LED. 431 */ 432 if(miiphy_link(CFG_FAULT_MII_ADDR)) { 433 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 434 } else { 435 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 436 } 437 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 438 #endif /* CONFIG_MII, ... */ 439 440 /* 441 * Main packet reception loop. Loop receiving packets until 442 * someone sets `NetQuit'. 443 */ 444 for (;;) { 445 WATCHDOG_RESET(); 446 #ifdef CONFIG_SHOW_ACTIVITY 447 { 448 extern void show_activity(int arg); 449 show_activity(1); 450 } 451 #endif 452 /* 453 * Check the ethernet for a new packet. The ethernet 454 * receive routine will process it. 455 */ 456 eth_rx(); 457 458 /* 459 * Abort if ctrl-c was pressed. 460 */ 461 if (ctrlc()) { 462 eth_halt(); 463 puts ("\nAbort\n"); 464 return (-1); 465 } 466 467 ArpTimeoutCheck(); 468 469 /* 470 * Check for a timeout, and run the timeout handler 471 * if we have one. 472 */ 473 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 474 thand_f *x; 475 476 #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII) 477 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 478 /* 479 * Echo the inverted link state to the fault LED. 480 */ 481 if(miiphy_link(CFG_FAULT_MII_ADDR)) { 482 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 483 } else { 484 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 485 } 486 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 487 #endif /* CONFIG_MII, ... */ 488 x = timeHandler; 489 timeHandler = (thand_f *)0; 490 (*x)(); 491 } 492 493 494 switch (NetState) { 495 496 case NETLOOP_RESTART: 497 #ifdef CONFIG_NET_MULTI 498 NetRestarted = 1; 499 #endif 500 goto restart; 501 502 case NETLOOP_SUCCESS: 503 if (NetBootFileXferSize > 0) { 504 char buf[10]; 505 printf("Bytes transferred = %ld (%lx hex)\n", 506 NetBootFileXferSize, 507 NetBootFileXferSize); 508 sprintf(buf, "%lx", NetBootFileXferSize); 509 setenv("filesize", buf); 510 511 sprintf(buf, "%lX", (unsigned long)load_addr); 512 setenv("fileaddr", buf); 513 } 514 eth_halt(); 515 return NetBootFileXferSize; 516 517 case NETLOOP_FAIL: 518 return (-1); 519 } 520 } 521 } 522 523 /**********************************************************************/ 524 525 static void 526 startAgainTimeout(void) 527 { 528 NetState = NETLOOP_RESTART; 529 } 530 531 static void 532 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 533 { 534 /* Totally ignore the packet */ 535 } 536 537 void NetStartAgain (void) 538 { 539 #ifdef CONFIG_NET_MULTI 540 DECLARE_GLOBAL_DATA_PTR; 541 #endif 542 char *nretry; 543 int noretry = 0, once = 0; 544 545 if ((nretry = getenv ("netretry")) != NULL) { 546 noretry = (strcmp (nretry, "no") == 0); 547 once = (strcmp (nretry, "once") == 0); 548 } 549 if (noretry) { 550 eth_halt (); 551 NetState = NETLOOP_FAIL; 552 return; 553 } 554 #ifndef CONFIG_NET_MULTI 555 NetSetTimeout (10 * CFG_HZ, startAgainTimeout); 556 NetSetHandler (startAgainHandler); 557 #else /* !CONFIG_NET_MULTI*/ 558 eth_halt (); 559 eth_try_another (!NetRestarted); 560 eth_init (gd->bd); 561 if (NetRestartWrap) { 562 NetRestartWrap = 0; 563 if (NetDevExists && !once) { 564 NetSetTimeout (10 * CFG_HZ, startAgainTimeout); 565 NetSetHandler (startAgainHandler); 566 } else { 567 NetState = NETLOOP_FAIL; 568 } 569 } else { 570 NetState = NETLOOP_RESTART; 571 } 572 #endif /* CONFIG_NET_MULTI */ 573 } 574 575 /**********************************************************************/ 576 /* 577 * Miscelaneous bits. 578 */ 579 580 void 581 NetSetHandler(rxhand_f * f) 582 { 583 packetHandler = f; 584 } 585 586 587 void 588 NetSetTimeout(int iv, thand_f * f) 589 { 590 if (iv == 0) { 591 timeHandler = (thand_f *)0; 592 } else { 593 timeHandler = f; 594 timeStart = get_timer(0); 595 timeDelta = iv; 596 } 597 } 598 599 600 void 601 NetSendPacket(volatile uchar * pkt, int len) 602 { 603 (void) eth_send(pkt, len); 604 } 605 606 int 607 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 608 { 609 uchar *pkt; 610 611 /* convert to new style broadcast */ 612 if (dest == 0) 613 dest = 0xFFFFFFFF; 614 615 /* if broadcast, make the ether address a broadcast and don't do ARP */ 616 if (dest == 0xFFFFFFFF) 617 ether = NetBcastAddr; 618 619 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 620 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 621 622 #ifdef ET_DEBUG 623 printf("sending ARP for %08lx\n", dest); 624 #endif 625 NetArpWaitPacketIP = dest; 626 NetArpWaitPacketMAC = ether; 627 628 pkt = NetArpWaitTxPacket; 629 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 630 631 NetSetIP (pkt, dest, dport, sport, len); 632 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 633 634 /* size of the waiting packet */ 635 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 636 637 /* and do the ARP request */ 638 NetArpWaitTry = 1; 639 NetArpWaitTimerStart = get_timer(0); 640 ArpRequest(); 641 return 1; /* waiting */ 642 } 643 644 #ifdef ET_DEBUG 645 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", 646 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 647 #endif 648 649 pkt = (uchar *)NetTxPacket; 650 pkt += NetSetEther (pkt, ether, PROT_IP); 651 NetSetIP (pkt, dest, dport, sport, len); 652 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 653 654 return 0; /* transmitted */ 655 } 656 657 #if (CONFIG_COMMANDS & CFG_CMD_PING) 658 static ushort PingSeqNo; 659 660 int PingSend(void) 661 { 662 static uchar mac[6]; 663 volatile IP_t *ip; 664 volatile ushort *s; 665 uchar *pkt; 666 667 /* XXX always send arp request */ 668 669 memcpy(mac, NetEtherNullAddr, 6); 670 671 #ifdef ET_DEBUG 672 printf("sending ARP for %08lx\n", NetPingIP); 673 #endif 674 675 NetArpWaitPacketIP = NetPingIP; 676 NetArpWaitPacketMAC = mac; 677 678 pkt = NetArpWaitTxPacket; 679 pkt += NetSetEther(pkt, mac, PROT_IP); 680 681 ip = (volatile IP_t *)pkt; 682 683 /* 684 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 685 */ 686 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 687 ip->ip_tos = 0; 688 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 689 ip->ip_id = htons(NetIPID++); 690 ip->ip_off = htons(0x4000); /* No fragmentation */ 691 ip->ip_ttl = 255; 692 ip->ip_p = 0x01; /* ICMP */ 693 ip->ip_sum = 0; 694 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 695 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 696 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 697 698 s = &ip->udp_src; /* XXX ICMP starts here */ 699 s[0] = htons(0x0800); /* echo-request, code */ 700 s[1] = 0; /* checksum */ 701 s[2] = 0; /* identifier */ 702 s[3] = htons(PingSeqNo++); /* sequence number */ 703 s[1] = ~NetCksum((uchar *)s, 8/2); 704 705 /* size of the waiting packet */ 706 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 707 708 /* and do the ARP request */ 709 NetArpWaitTry = 1; 710 NetArpWaitTimerStart = get_timer(0); 711 ArpRequest(); 712 return 1; /* waiting */ 713 } 714 715 static void 716 PingTimeout (void) 717 { 718 eth_halt(); 719 NetState = NETLOOP_FAIL; /* we did not get the reply */ 720 } 721 722 static void 723 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 724 { 725 IPaddr_t tmp; 726 volatile IP_t *ip = (volatile IP_t *)pkt; 727 728 tmp = NetReadIP((void *)&ip->ip_src); 729 if (tmp != NetPingIP) 730 return; 731 732 NetState = NETLOOP_SUCCESS; 733 } 734 735 static void PingStart(void) 736 { 737 #if defined(CONFIG_NET_MULTI) 738 printf ("Using %s device\n", eth_get_name()); 739 #endif /* CONFIG_NET_MULTI */ 740 NetSetTimeout (10 * CFG_HZ, PingTimeout); 741 NetSetHandler (PingHandler); 742 743 PingSend(); 744 } 745 #endif /* CFG_CMD_PING */ 746 747 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 748 749 #define CDP_DEVICE_ID_TLV 0x0001 750 #define CDP_ADDRESS_TLV 0x0002 751 #define CDP_PORT_ID_TLV 0x0003 752 #define CDP_CAPABILITIES_TLV 0x0004 753 #define CDP_VERSION_TLV 0x0005 754 #define CDP_PLATFORM_TLV 0x0006 755 #define CDP_NATIVE_VLAN_TLV 0x000a 756 #define CDP_APPLIANCE_VLAN_TLV 0x000e 757 #define CDP_TRIGGER_TLV 0x000f 758 #define CDP_POWER_CONSUMPTION_TLV 0x0010 759 #define CDP_SYSNAME_TLV 0x0014 760 #define CDP_SYSOBJECT_TLV 0x0015 761 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 762 763 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */ 764 765 static int CDPSeq; 766 static int CDPOK; 767 768 ushort CDPNativeVLAN; 769 ushort CDPApplianceVLAN; 770 771 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 772 773 static ushort CDP_compute_csum(const uchar *buff, ushort len) 774 { 775 ushort csum; 776 int odd; 777 ulong result = 0; 778 ushort leftover; 779 780 if (len > 0) { 781 odd = 1 & (ulong)buff; 782 if (odd) { 783 result = *buff << 8; 784 len--; 785 buff++; 786 } 787 while (len > 1) { 788 result += *((const ushort *)buff)++; 789 if (result & 0x80000000) 790 result = (result & 0xFFFF) + (result >> 16); 791 len -= 2; 792 } 793 if (len) { 794 leftover = (signed short)(*(const signed char *)buff); 795 /* * XXX CISCO SUCKS big time! (and blows too) */ 796 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 797 } 798 while (result >> 16) 799 result = (result & 0xFFFF) + (result >> 16); 800 801 if (odd) 802 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 803 } 804 805 /* add up 16-bit and 17-bit words for 17+c bits */ 806 result = (result & 0xffff) + (result >> 16); 807 /* add up 16-bit and 2-bit for 16+c bit */ 808 result = (result & 0xffff) + (result >> 16); 809 /* add up carry.. */ 810 result = (result & 0xffff) + (result >> 16); 811 812 /* negate */ 813 csum = ~(ushort)result; 814 815 /* run time endian detection */ 816 if (csum != htons(csum)) /* little endian */ 817 csum = htons(csum); 818 819 return csum; 820 } 821 822 int CDPSendTrigger(void) 823 { 824 volatile uchar *pkt; 825 volatile ushort *s; 826 volatile ushort *cp; 827 Ethernet_t *et; 828 int len; 829 ushort chksum; 830 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 831 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 832 char buf[32]; 833 #endif 834 835 pkt = NetTxPacket; 836 et = (Ethernet_t *)pkt; 837 838 /* NOTE: trigger sent not on any VLAN */ 839 840 /* form ethernet header */ 841 memcpy(et->et_dest, NetCDPAddr, 6); 842 memcpy(et->et_src, NetOurEther, 6); 843 844 pkt += ETHER_HDR_SIZE; 845 846 /* SNAP header */ 847 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 848 pkt += sizeof(CDP_SNAP_hdr); 849 850 /* CDP header */ 851 *pkt++ = 0x02; /* CDP version 2 */ 852 *pkt++ = 180; /* TTL */ 853 s = (volatile ushort *)pkt; 854 cp = s; 855 *s++ = htons(0); /* checksum (0 for later calculation) */ 856 857 /* CDP fields */ 858 #ifdef CONFIG_CDP_DEVICE_ID 859 *s++ = htons(CDP_DEVICE_ID_TLV); 860 *s++ = htons(CONFIG_CDP_DEVICE_ID); 861 memset(buf, 0, sizeof(buf)); 862 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 863 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 864 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 865 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 866 memcpy((uchar *)s, buf, 16); 867 s += 16 / 2; 868 #endif 869 870 #ifdef CONFIG_CDP_PORT_ID 871 *s++ = htons(CDP_PORT_ID_TLV); 872 memset(buf, 0, sizeof(buf)); 873 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 874 len = strlen(buf); 875 if (len & 1) /* make it even */ 876 len++; 877 *s++ = htons(len + 4); 878 memcpy((uchar *)s, buf, len); 879 s += len / 2; 880 #endif 881 882 #ifdef CONFIG_CDP_CAPABILITIES 883 *s++ = htons(CDP_CAPABILITIES_TLV); 884 *s++ = htons(8); 885 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 886 s += 2; 887 #endif 888 889 #ifdef CONFIG_CDP_VERSION 890 *s++ = htons(CDP_VERSION_TLV); 891 memset(buf, 0, sizeof(buf)); 892 strcpy(buf, CONFIG_CDP_VERSION); 893 len = strlen(buf); 894 if (len & 1) /* make it even */ 895 len++; 896 *s++ = htons(len + 4); 897 memcpy((uchar *)s, buf, len); 898 s += len / 2; 899 #endif 900 901 #ifdef CONFIG_CDP_PLATFORM 902 *s++ = htons(CDP_PLATFORM_TLV); 903 memset(buf, 0, sizeof(buf)); 904 strcpy(buf, CONFIG_CDP_PLATFORM); 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_TRIGGER 914 *s++ = htons(CDP_TRIGGER_TLV); 915 *s++ = htons(8); 916 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 917 s += 2; 918 #endif 919 920 #ifdef CONFIG_CDP_POWER_CONSUMPTION 921 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 922 *s++ = htons(6); 923 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 924 #endif 925 926 /* length of ethernet packet */ 927 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 928 et->et_protlen = htons(len); 929 930 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 931 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 932 if (chksum == 0) 933 chksum = 0xFFFF; 934 *cp = htons(chksum); 935 936 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 937 return 0; 938 } 939 940 static void 941 CDPTimeout (void) 942 { 943 CDPSeq++; 944 945 if (CDPSeq < 3) { 946 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 947 CDPSendTrigger(); 948 return; 949 } 950 951 /* if not OK try again */ 952 if (!CDPOK) 953 NetStartAgain(); 954 else 955 NetState = NETLOOP_SUCCESS; 956 } 957 958 static void 959 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 960 { 961 /* nothing */ 962 } 963 964 static void 965 CDPHandler(const uchar * pkt, unsigned len) 966 { 967 const uchar *t; 968 const ushort *ss; 969 ushort type, tlen; 970 uchar applid; 971 ushort vlan, nvlan; 972 973 /* minimum size? */ 974 if (len < sizeof(CDP_SNAP_hdr) + 4) 975 goto pkt_short; 976 977 /* check for valid CDP SNAP header */ 978 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 979 return; 980 981 pkt += sizeof(CDP_SNAP_hdr); 982 len -= sizeof(CDP_SNAP_hdr); 983 984 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 985 if (pkt[0] < 0x02 || pkt[1] == 0) 986 return; 987 988 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 989 if (pkt[0] != 0x02) 990 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 991 pkt[0] & 0xff); 992 993 if (CDP_compute_csum(pkt, len) != 0) 994 return; 995 996 pkt += 4; 997 len -= 4; 998 999 vlan = htons(-1); 1000 nvlan = htons(-1); 1001 while (len > 0) { 1002 if (len < 4) 1003 goto pkt_short; 1004 1005 ss = (const ushort *)pkt; 1006 type = ntohs(ss[0]); 1007 tlen = ntohs(ss[1]); 1008 if (tlen > len) { 1009 goto pkt_short; 1010 } 1011 1012 pkt += tlen; 1013 len -= tlen; 1014 1015 ss += 2; /* point ss to the data of the TLV */ 1016 tlen -= 4; 1017 1018 switch (type) { 1019 case CDP_DEVICE_ID_TLV: 1020 break; 1021 case CDP_ADDRESS_TLV: 1022 break; 1023 case CDP_PORT_ID_TLV: 1024 break; 1025 case CDP_CAPABILITIES_TLV: 1026 break; 1027 case CDP_VERSION_TLV: 1028 break; 1029 case CDP_PLATFORM_TLV: 1030 break; 1031 case CDP_NATIVE_VLAN_TLV: 1032 nvlan = *ss; 1033 break; 1034 case CDP_APPLIANCE_VLAN_TLV: 1035 t = (const uchar *)ss; 1036 while (tlen > 0) { 1037 if (tlen < 3) 1038 goto pkt_short; 1039 1040 applid = t[0]; 1041 ss = (const ushort *)(t + 1); 1042 1043 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1044 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1045 vlan = *ss; 1046 #else 1047 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1048 #endif 1049 t += 3; tlen -= 3; 1050 } 1051 break; 1052 case CDP_TRIGGER_TLV: 1053 break; 1054 case CDP_POWER_CONSUMPTION_TLV: 1055 break; 1056 case CDP_SYSNAME_TLV: 1057 break; 1058 case CDP_SYSOBJECT_TLV: 1059 break; 1060 case CDP_MANAGEMENT_ADDRESS_TLV: 1061 break; 1062 } 1063 } 1064 1065 CDPApplianceVLAN = vlan; 1066 CDPNativeVLAN = nvlan; 1067 1068 CDPOK = 1; 1069 return; 1070 1071 pkt_short: 1072 printf("** CDP packet is too short\n"); 1073 return; 1074 } 1075 1076 static void CDPStart(void) 1077 { 1078 #if defined(CONFIG_NET_MULTI) 1079 printf ("Using %s device\n", eth_get_name()); 1080 #endif 1081 CDPSeq = 0; 1082 CDPOK = 0; 1083 1084 CDPNativeVLAN = htons(-1); 1085 CDPApplianceVLAN = htons(-1); 1086 1087 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1088 NetSetHandler (CDPDummyHandler); 1089 1090 CDPSendTrigger(); 1091 } 1092 #endif /* CFG_CMD_CDP */ 1093 1094 1095 void 1096 NetReceive(volatile uchar * inpkt, int len) 1097 { 1098 Ethernet_t *et; 1099 IP_t *ip; 1100 ARP_t *arp; 1101 IPaddr_t tmp; 1102 int x; 1103 uchar *pkt; 1104 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1105 int iscdp; 1106 #endif 1107 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1108 1109 #ifdef ET_DEBUG 1110 printf("packet received\n"); 1111 #endif 1112 1113 NetRxPkt = inpkt; 1114 NetRxPktLen = len; 1115 et = (Ethernet_t *)inpkt; 1116 1117 /* too small packet? */ 1118 if (len < ETHER_HDR_SIZE) 1119 return; 1120 1121 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1122 /* keep track if packet is CDP */ 1123 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1124 #endif 1125 1126 myvlanid = ntohs(NetOurVLAN); 1127 if (myvlanid == (ushort)-1) 1128 myvlanid = VLAN_NONE; 1129 mynvlanid = ntohs(NetOurNativeVLAN); 1130 if (mynvlanid == (ushort)-1) 1131 mynvlanid = VLAN_NONE; 1132 1133 x = ntohs(et->et_protlen); 1134 1135 #ifdef ET_DEBUG 1136 printf("packet received\n"); 1137 #endif 1138 1139 if (x < 1514) { 1140 /* 1141 * Got a 802 packet. Check the other protocol field. 1142 */ 1143 x = ntohs(et->et_prot); 1144 1145 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1146 len -= E802_HDR_SIZE; 1147 1148 } else if (x != PROT_VLAN) { /* normal packet */ 1149 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1150 len -= ETHER_HDR_SIZE; 1151 1152 } else { /* VLAN packet */ 1153 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1154 1155 #ifdef ET_DEBUG 1156 printf("VLAN packet received\n"); 1157 #endif 1158 /* too small packet? */ 1159 if (len < VLAN_ETHER_HDR_SIZE) 1160 return; 1161 1162 /* if no VLAN active */ 1163 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1164 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1165 && iscdp == 0 1166 #endif 1167 ) 1168 return; 1169 1170 cti = ntohs(vet->vet_tag); 1171 vlanid = cti & VLAN_IDMASK; 1172 x = ntohs(vet->vet_type); 1173 1174 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1175 len -= VLAN_ETHER_HDR_SIZE; 1176 } 1177 1178 #ifdef ET_DEBUG 1179 printf("Receive from protocol 0x%x\n", x); 1180 #endif 1181 1182 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1183 if (iscdp) { 1184 CDPHandler((uchar *)ip, len); 1185 return; 1186 } 1187 #endif 1188 1189 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1190 if (vlanid == VLAN_NONE) 1191 vlanid = (mynvlanid & VLAN_IDMASK); 1192 /* not matched? */ 1193 if (vlanid != (myvlanid & VLAN_IDMASK)) 1194 return; 1195 } 1196 1197 switch (x) { 1198 1199 case PROT_ARP: 1200 /* 1201 * We have to deal with two types of ARP packets: 1202 * - REQUEST packets will be answered by sending our 1203 * IP address - if we know it. 1204 * - REPLY packates are expected only after we asked 1205 * for the TFTP server's or the gateway's ethernet 1206 * address; so if we receive such a packet, we set 1207 * the server ethernet address 1208 */ 1209 #ifdef ET_DEBUG 1210 puts ("Got ARP\n"); 1211 #endif 1212 arp = (ARP_t *)ip; 1213 if (len < ARP_HDR_SIZE) { 1214 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1215 return; 1216 } 1217 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1218 return; 1219 } 1220 if (ntohs(arp->ar_pro) != PROT_IP) { 1221 return; 1222 } 1223 if (arp->ar_hln != 6) { 1224 return; 1225 } 1226 if (arp->ar_pln != 4) { 1227 return; 1228 } 1229 1230 if (NetOurIP == 0) { 1231 return; 1232 } 1233 1234 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1235 return; 1236 } 1237 1238 switch (ntohs(arp->ar_op)) { 1239 case ARPOP_REQUEST: /* reply with our IP address */ 1240 #ifdef ET_DEBUG 1241 puts ("Got ARP REQUEST, return our IP\n"); 1242 #endif 1243 pkt = (uchar *)et; 1244 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1245 arp->ar_op = htons(ARPOP_REPLY); 1246 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1247 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1248 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1249 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1250 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1251 return; 1252 1253 case ARPOP_REPLY: /* arp reply */ 1254 /* are we waiting for a reply */ 1255 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1256 break; 1257 #ifdef ET_DEBUG 1258 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1259 arp->ar_data[0], arp->ar_data[1], 1260 arp->ar_data[2], arp->ar_data[3], 1261 arp->ar_data[4], arp->ar_data[5]); 1262 #endif 1263 1264 tmp = NetReadIP(&arp->ar_data[6]); 1265 1266 /* matched waiting packet's address */ 1267 if (tmp == NetArpWaitReplyIP) { 1268 #ifdef ET_DEBUG 1269 puts ("Got it\n"); 1270 #endif 1271 /* save address for later use */ 1272 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1273 1274 #ifdef CONFIG_NETCONSOLE 1275 (*packetHandler)(0,0,0,0); 1276 #endif 1277 /* modify header, and transmit it */ 1278 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1279 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1280 1281 /* no arp request pending now */ 1282 NetArpWaitPacketIP = 0; 1283 NetArpWaitTxPacketSize = 0; 1284 NetArpWaitPacketMAC = NULL; 1285 1286 } 1287 return; 1288 default: 1289 #ifdef ET_DEBUG 1290 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1291 #endif 1292 return; 1293 } 1294 1295 case PROT_RARP: 1296 #ifdef ET_DEBUG 1297 puts ("Got RARP\n"); 1298 #endif 1299 arp = (ARP_t *)ip; 1300 if (len < ARP_HDR_SIZE) { 1301 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1302 return; 1303 } 1304 1305 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1306 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1307 (ntohs(arp->ar_pro) != PROT_IP) || 1308 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1309 1310 puts ("invalid RARP header\n"); 1311 } else { 1312 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1313 if (NetServerIP == 0) 1314 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1315 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1316 1317 (*packetHandler)(0,0,0,0); 1318 } 1319 break; 1320 1321 case PROT_IP: 1322 #ifdef ET_DEBUG 1323 puts ("Got IP\n"); 1324 #endif 1325 if (len < IP_HDR_SIZE) { 1326 debug ("len bad %d < %d\n", len, IP_HDR_SIZE); 1327 return; 1328 } 1329 if (len < ntohs(ip->ip_len)) { 1330 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1331 return; 1332 } 1333 len = ntohs(ip->ip_len); 1334 #ifdef ET_DEBUG 1335 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1336 #endif 1337 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1338 return; 1339 } 1340 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ 1341 return; 1342 } 1343 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1344 puts ("checksum bad\n"); 1345 return; 1346 } 1347 tmp = NetReadIP(&ip->ip_dst); 1348 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1349 return; 1350 } 1351 /* 1352 * watch for ICMP host redirects 1353 * 1354 * There is no real handler code (yet). We just watch 1355 * for ICMP host redirect messages. In case anybody 1356 * sees these messages: please contact me 1357 * (wd@denx.de), or - even better - send me the 1358 * necessary fixes :-) 1359 * 1360 * Note: in all cases where I have seen this so far 1361 * it was a problem with the router configuration, 1362 * for instance when a router was configured in the 1363 * BOOTP reply, but the TFTP server was on the same 1364 * subnet. So this is probably a warning that your 1365 * configuration might be wrong. But I'm not really 1366 * sure if there aren't any other situations. 1367 */ 1368 if (ip->ip_p == IPPROTO_ICMP) { 1369 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1370 1371 switch (icmph->type) { 1372 case ICMP_REDIRECT: 1373 if (icmph->code != ICMP_REDIR_HOST) 1374 return; 1375 puts (" ICMP Host Redirect to "); 1376 print_IPaddr(icmph->un.gateway); 1377 putc(' '); 1378 break; 1379 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1380 case ICMP_ECHO_REPLY: 1381 /* 1382 * IP header OK. Pass the packet to the current handler. 1383 */ 1384 /* XXX point to ip packet */ 1385 (*packetHandler)((uchar *)ip, 0, 0, 0); 1386 break; 1387 #endif 1388 default: 1389 return; 1390 } 1391 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1392 return; 1393 } 1394 1395 #ifdef CONFIG_NETCONSOLE 1396 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1397 ntohs(ip->udp_dst), 1398 ntohs(ip->udp_src), 1399 ntohs(ip->udp_len) - 8); 1400 #endif 1401 /* 1402 * IP header OK. Pass the packet to the current handler. 1403 */ 1404 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1405 ntohs(ip->udp_dst), 1406 ntohs(ip->udp_src), 1407 ntohs(ip->udp_len) - 8); 1408 break; 1409 } 1410 } 1411 1412 1413 /**********************************************************************/ 1414 1415 static int net_check_prereq (proto_t protocol) 1416 { 1417 switch (protocol) { 1418 /* Fall through */ 1419 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1420 case PING: 1421 if (NetPingIP == 0) { 1422 puts ("*** ERROR: ping address not given\n"); 1423 return (1); 1424 } 1425 goto common; 1426 #endif 1427 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 1428 case NFS: 1429 #endif 1430 case NETCONS: 1431 case TFTP: 1432 if (NetServerIP == 0) { 1433 puts ("*** ERROR: `serverip' not set\n"); 1434 return (1); 1435 } 1436 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1437 common: 1438 #endif 1439 1440 if (NetOurIP == 0) { 1441 puts ("*** ERROR: `ipaddr' not set\n"); 1442 return (1); 1443 } 1444 /* Fall through */ 1445 1446 case DHCP: 1447 case RARP: 1448 case BOOTP: 1449 case CDP: 1450 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1451 #ifdef CONFIG_NET_MULTI 1452 extern int eth_get_dev_index (void); 1453 int num = eth_get_dev_index (); 1454 1455 switch (num) { 1456 case -1: 1457 puts ("*** ERROR: No ethernet found.\n"); 1458 return (1); 1459 case 0: 1460 puts ("*** ERROR: `ethaddr' not set\n"); 1461 break; 1462 default: 1463 printf ("*** ERROR: `eth%daddr' not set\n", 1464 num); 1465 break; 1466 } 1467 1468 NetStartAgain (); 1469 return (2); 1470 #else 1471 puts ("*** ERROR: `ethaddr' not set\n"); 1472 return (1); 1473 #endif 1474 } 1475 /* Fall through */ 1476 default: 1477 return (0); 1478 } 1479 return (0); /* OK */ 1480 } 1481 /**********************************************************************/ 1482 1483 int 1484 NetCksumOk(uchar * ptr, int len) 1485 { 1486 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1487 } 1488 1489 1490 unsigned 1491 NetCksum(uchar * ptr, int len) 1492 { 1493 ulong xsum; 1494 1495 xsum = 0; 1496 while (len-- > 0) 1497 xsum += *((ushort *)ptr)++; 1498 xsum = (xsum & 0xffff) + (xsum >> 16); 1499 xsum = (xsum & 0xffff) + (xsum >> 16); 1500 return (xsum & 0xffff); 1501 } 1502 1503 int 1504 NetEthHdrSize(void) 1505 { 1506 ushort myvlanid; 1507 1508 myvlanid = ntohs(NetOurVLAN); 1509 if (myvlanid == (ushort)-1) 1510 myvlanid = VLAN_NONE; 1511 1512 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1513 } 1514 1515 int 1516 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1517 { 1518 Ethernet_t *et = (Ethernet_t *)xet; 1519 ushort myvlanid; 1520 1521 myvlanid = ntohs(NetOurVLAN); 1522 if (myvlanid == (ushort)-1) 1523 myvlanid = VLAN_NONE; 1524 1525 memcpy (et->et_dest, addr, 6); 1526 memcpy (et->et_src, NetOurEther, 6); 1527 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1528 et->et_protlen = htons(prot); 1529 return ETHER_HDR_SIZE; 1530 } else { 1531 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1532 1533 vet->vet_vlan_type = htons(PROT_VLAN); 1534 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1535 vet->vet_type = htons(prot); 1536 return VLAN_ETHER_HDR_SIZE; 1537 } 1538 } 1539 1540 void 1541 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1542 { 1543 volatile IP_t *ip = (IP_t *)xip; 1544 1545 /* 1546 * If the data is an odd number of bytes, zero the 1547 * byte after the last byte so that the checksum 1548 * will work. 1549 */ 1550 if (len & 1) 1551 xip[IP_HDR_SIZE + len] = 0; 1552 1553 /* 1554 * Construct an IP and UDP header. 1555 * (need to set no fragment bit - XXX) 1556 */ 1557 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1558 ip->ip_tos = 0; 1559 ip->ip_len = htons(IP_HDR_SIZE + len); 1560 ip->ip_id = htons(NetIPID++); 1561 ip->ip_off = htons(0x4000); /* No fragmentation */ 1562 ip->ip_ttl = 255; 1563 ip->ip_p = 17; /* UDP */ 1564 ip->ip_sum = 0; 1565 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1566 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1567 ip->udp_src = htons(sport); 1568 ip->udp_dst = htons(dport); 1569 ip->udp_len = htons(8 + len); 1570 ip->udp_xsum = 0; 1571 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1572 } 1573 1574 void copy_filename (uchar *dst, uchar *src, int size) 1575 { 1576 if (*src && (*src == '"')) { 1577 ++src; 1578 --size; 1579 } 1580 1581 while ((--size > 0) && *src && (*src != '"')) { 1582 *dst++ = *src++; 1583 } 1584 *dst = '\0'; 1585 } 1586 1587 #endif /* CFG_CMD_NET */ 1588 1589 void ip_to_string (IPaddr_t x, char *s) 1590 { 1591 x = ntohl (x); 1592 sprintf (s, "%d.%d.%d.%d", 1593 (int) ((x >> 24) & 0xff), 1594 (int) ((x >> 16) & 0xff), 1595 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1596 ); 1597 } 1598 1599 IPaddr_t string_to_ip(char *s) 1600 { 1601 IPaddr_t addr; 1602 char *e; 1603 int i; 1604 1605 if (s == NULL) 1606 return(0); 1607 1608 for (addr=0, i=0; i<4; ++i) { 1609 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1610 addr <<= 8; 1611 addr |= (val & 0xFF); 1612 if (s) { 1613 s = (*e) ? e+1 : e; 1614 } 1615 } 1616 1617 return (htonl(addr)); 1618 } 1619 1620 void VLAN_to_string(ushort x, char *s) 1621 { 1622 x = ntohs(x); 1623 1624 if (x == (ushort)-1) 1625 x = VLAN_NONE; 1626 1627 if (x == VLAN_NONE) 1628 strcpy(s, "none"); 1629 else 1630 sprintf(s, "%d", x & VLAN_IDMASK); 1631 } 1632 1633 ushort string_to_VLAN(char *s) 1634 { 1635 ushort id; 1636 1637 if (s == NULL) 1638 return htons(VLAN_NONE); 1639 1640 if (*s < '0' || *s > '9') 1641 id = VLAN_NONE; 1642 else 1643 id = (ushort)simple_strtoul(s, NULL, 10); 1644 1645 return htons(id); 1646 } 1647 1648 void print_IPaddr (IPaddr_t x) 1649 { 1650 char tmp[16]; 1651 1652 ip_to_string (x, tmp); 1653 1654 puts (tmp); 1655 } 1656 1657 IPaddr_t getenv_IPaddr (char *var) 1658 { 1659 return (string_to_ip(getenv(var))); 1660 } 1661 1662 ushort getenv_VLAN(char *var) 1663 { 1664 return (string_to_VLAN(getenv(var))); 1665 } 1666