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 DECLARE_GLOBAL_DATA_PTR; 96 97 #define ARP_TIMEOUT 5 /* Seconds before trying ARP again */ 98 #ifndef CONFIG_NET_RETRY_COUNT 99 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 100 #else 101 # define ARP_TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) 102 #endif 103 104 #if 0 105 #define ET_DEBUG 106 #endif 107 108 /** BOOTP EXTENTIONS **/ 109 110 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 111 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 112 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 113 #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2) 114 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 115 #endif 116 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 117 char NetOurHostName[32]={0,}; /* Our hostname */ 118 char NetOurRootPath[64]={0,}; /* Our bootpath */ 119 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 120 121 /** END OF BOOTP EXTENTIONS **/ 122 123 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 124 uchar NetOurEther[6]; /* Our ethernet address */ 125 uchar NetServerEther[6] = /* Boot server enet address */ 126 { 0, 0, 0, 0, 0, 0 }; 127 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 128 IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */ 129 volatile uchar *NetRxPkt; /* Current receive packet */ 130 int NetRxPktLen; /* Current rx packet length */ 131 unsigned NetIPID; /* IP packet ID */ 132 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 133 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 134 uchar NetEtherNullAddr[6] = 135 { 0, 0, 0, 0, 0, 0 }; 136 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 137 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 138 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 139 #endif 140 int NetState; /* Network loop state */ 141 #ifdef CONFIG_NET_MULTI 142 int NetRestartWrap = 0; /* Tried all network devices */ 143 static int NetRestarted = 0; /* Network loop restarted */ 144 static int NetDevExists = 0; /* At least one device configured */ 145 #endif 146 147 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 148 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 149 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 150 151 char BootFile[128]; /* Boot File name */ 152 153 #if (CONFIG_COMMANDS & CFG_CMD_PING) 154 IPaddr_t NetPingIP; /* the ip address to ping */ 155 156 static void PingStart(void); 157 #endif 158 159 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 160 static void CDPStart(void); 161 #endif 162 163 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 164 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 165 int NetTimeOffset=0; /* offset time from UTC */ 166 #endif 167 168 #ifdef CONFIG_NETCONSOLE 169 void NcStart(void); 170 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 171 #endif 172 173 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 174 175 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 176 177 static rxhand_f *packetHandler; /* Current RX packet handler */ 178 static thand_f *timeHandler; /* Current timeout handler */ 179 static ulong timeStart; /* Time base value */ 180 static ulong timeDelta; /* Current timeout value */ 181 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 182 183 static int net_check_prereq (proto_t protocol); 184 185 /**********************************************************************/ 186 187 IPaddr_t NetArpWaitPacketIP; 188 IPaddr_t NetArpWaitReplyIP; 189 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 190 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 191 int NetArpWaitTxPacketSize; 192 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 193 ulong NetArpWaitTimerStart; 194 int NetArpWaitTry; 195 196 void ArpRequest (void) 197 { 198 int i; 199 volatile uchar *pkt; 200 ARP_t *arp; 201 202 #ifdef ET_DEBUG 203 printf ("ARP broadcast %d\n", NetArpWaitTry); 204 #endif 205 pkt = NetTxPacket; 206 207 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 208 209 arp = (ARP_t *) pkt; 210 211 arp->ar_hrd = htons (ARP_ETHER); 212 arp->ar_pro = htons (PROT_IP); 213 arp->ar_hln = 6; 214 arp->ar_pln = 4; 215 arp->ar_op = htons (ARPOP_REQUEST); 216 217 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 218 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 219 for (i = 10; i < 16; ++i) { 220 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 221 } 222 223 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 224 (NetOurIP & NetOurSubnetMask)) { 225 if (NetOurGatewayIP == 0) { 226 puts ("## Warning: gatewayip needed but not set\n"); 227 NetArpWaitReplyIP = NetArpWaitPacketIP; 228 } else { 229 NetArpWaitReplyIP = NetOurGatewayIP; 230 } 231 } else { 232 NetArpWaitReplyIP = NetArpWaitPacketIP; 233 } 234 235 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 236 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 237 } 238 239 void ArpTimeoutCheck(void) 240 { 241 ulong t; 242 243 if (!NetArpWaitPacketIP) 244 return; 245 246 t = get_timer(0); 247 248 /* check for arp timeout */ 249 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) { 250 NetArpWaitTry++; 251 252 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 253 puts ("\nARP Retry count exceeded; starting again\n"); 254 NetArpWaitTry = 0; 255 NetStartAgain(); 256 } else { 257 NetArpWaitTimerStart = t; 258 ArpRequest(); 259 } 260 } 261 } 262 263 /**********************************************************************/ 264 /* 265 * Main network processing loop. 266 */ 267 268 int 269 NetLoop(proto_t protocol) 270 { 271 bd_t *bd = gd->bd; 272 273 #ifdef CONFIG_NET_MULTI 274 NetRestarted = 0; 275 NetDevExists = 0; 276 #endif 277 278 /* XXX problem with bss workaround */ 279 NetArpWaitPacketMAC = NULL; 280 NetArpWaitTxPacket = NULL; 281 NetArpWaitPacketIP = 0; 282 NetArpWaitReplyIP = 0; 283 NetArpWaitTxPacket = NULL; 284 NetTxPacket = NULL; 285 286 if (!NetTxPacket) { 287 int i; 288 /* 289 * Setup packet buffers, aligned correctly. 290 */ 291 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 292 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 293 for (i = 0; i < PKTBUFSRX; i++) { 294 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 295 } 296 } 297 298 if (!NetArpWaitTxPacket) { 299 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 300 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 301 NetArpWaitTxPacketSize = 0; 302 } 303 304 eth_halt(); 305 #ifdef CONFIG_NET_MULTI 306 eth_set_current(); 307 #endif 308 if (eth_init(bd) < 0) { 309 eth_halt(); 310 return(-1); 311 } 312 313 restart: 314 #ifdef CONFIG_NET_MULTI 315 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 316 #else 317 memcpy (NetOurEther, bd->bi_enetaddr, 6); 318 #endif 319 320 NetState = NETLOOP_CONTINUE; 321 322 /* 323 * Start the ball rolling with the given start function. From 324 * here on, this code is a state machine driven by received 325 * packets and timer events. 326 */ 327 328 switch (protocol) { 329 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 330 case NFS: 331 #endif 332 #if (CONFIG_COMMANDS & CFG_CMD_PING) 333 case PING: 334 #endif 335 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 336 case SNTP: 337 #endif 338 case NETCONS: 339 case TFTP: 340 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 341 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 342 NetOurSubnetMask= getenv_IPaddr ("netmask"); 343 NetOurVLAN = getenv_VLAN("vlan"); 344 NetOurNativeVLAN = getenv_VLAN("nvlan"); 345 346 switch (protocol) { 347 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 348 case NFS: 349 #endif 350 case NETCONS: 351 case TFTP: 352 NetServerIP = getenv_IPaddr ("serverip"); 353 break; 354 #if (CONFIG_COMMANDS & CFG_CMD_PING) 355 case PING: 356 /* nothing */ 357 break; 358 #endif 359 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 360 case SNTP: 361 /* nothing */ 362 break; 363 #endif 364 default: 365 break; 366 } 367 368 break; 369 case BOOTP: 370 case RARP: 371 /* 372 * initialize our IP addr to 0 in order to accept ANY 373 * IP addr assigned to us by the BOOTP / RARP server 374 */ 375 NetOurIP = 0; 376 NetServerIP = getenv_IPaddr ("serverip"); 377 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 378 NetOurNativeVLAN = getenv_VLAN("nvlan"); 379 case CDP: 380 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */ 381 NetOurNativeVLAN = getenv_VLAN("nvlan"); 382 break; 383 default: 384 break; 385 } 386 387 switch (net_check_prereq (protocol)) { 388 case 1: 389 /* network not configured */ 390 eth_halt(); 391 return (-1); 392 393 #ifdef CONFIG_NET_MULTI 394 case 2: 395 /* network device not configured */ 396 break; 397 #endif /* CONFIG_NET_MULTI */ 398 399 case 0: 400 #ifdef CONFIG_NET_MULTI 401 NetDevExists = 1; 402 #endif 403 switch (protocol) { 404 case TFTP: 405 /* always use ARP to get server ethernet address */ 406 TftpStart(); 407 break; 408 409 #if (CONFIG_COMMANDS & CFG_CMD_DHCP) 410 case DHCP: 411 /* Start with a clean slate... */ 412 BootpTry = 0; 413 NetOurIP = 0; 414 NetServerIP = getenv_IPaddr ("serverip"); 415 DhcpRequest(); /* Basically same as BOOTP */ 416 break; 417 #endif /* CFG_CMD_DHCP */ 418 419 case BOOTP: 420 BootpTry = 0; 421 BootpRequest (); 422 break; 423 424 case RARP: 425 RarpTry = 0; 426 RarpRequest (); 427 break; 428 #if (CONFIG_COMMANDS & CFG_CMD_PING) 429 case PING: 430 PingStart(); 431 break; 432 #endif 433 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 434 case NFS: 435 NfsStart(); 436 break; 437 #endif 438 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 439 case CDP: 440 CDPStart(); 441 break; 442 #endif 443 #ifdef CONFIG_NETCONSOLE 444 case NETCONS: 445 NcStart(); 446 break; 447 #endif 448 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 449 case SNTP: 450 SntpStart(); 451 break; 452 #endif 453 default: 454 break; 455 } 456 457 NetBootFileXferSize = 0; 458 break; 459 } 460 461 #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII) 462 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 463 /* 464 * Echo the inverted link state to the fault LED. 465 */ 466 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) { 467 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 468 } else { 469 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 470 } 471 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 472 #endif /* CONFIG_MII, ... */ 473 474 /* 475 * Main packet reception loop. Loop receiving packets until 476 * someone sets `NetState' to a state that terminates. 477 */ 478 for (;;) { 479 WATCHDOG_RESET(); 480 #ifdef CONFIG_SHOW_ACTIVITY 481 { 482 extern void show_activity(int arg); 483 show_activity(1); 484 } 485 #endif 486 /* 487 * Check the ethernet for a new packet. The ethernet 488 * receive routine will process it. 489 */ 490 eth_rx(); 491 492 /* 493 * Abort if ctrl-c was pressed. 494 */ 495 if (ctrlc()) { 496 eth_halt(); 497 puts ("\nAbort\n"); 498 return (-1); 499 } 500 501 ArpTimeoutCheck(); 502 503 /* 504 * Check for a timeout, and run the timeout handler 505 * if we have one. 506 */ 507 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 508 thand_f *x; 509 510 #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII) 511 # if defined(CFG_FAULT_ECHO_LINK_DOWN) && \ 512 defined(CONFIG_STATUS_LED) && \ 513 defined(STATUS_LED_RED) 514 /* 515 * Echo the inverted link state to the fault LED. 516 */ 517 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) { 518 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 519 } else { 520 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 521 } 522 # endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ 523 #endif /* CONFIG_MII, ... */ 524 x = timeHandler; 525 timeHandler = (thand_f *)0; 526 (*x)(); 527 } 528 529 530 switch (NetState) { 531 532 case NETLOOP_RESTART: 533 #ifdef CONFIG_NET_MULTI 534 NetRestarted = 1; 535 #endif 536 goto restart; 537 538 case NETLOOP_SUCCESS: 539 if (NetBootFileXferSize > 0) { 540 char buf[10]; 541 printf("Bytes transferred = %ld (%lx hex)\n", 542 NetBootFileXferSize, 543 NetBootFileXferSize); 544 sprintf(buf, "%lx", NetBootFileXferSize); 545 setenv("filesize", buf); 546 547 sprintf(buf, "%lX", (unsigned long)load_addr); 548 setenv("fileaddr", buf); 549 } 550 eth_halt(); 551 return NetBootFileXferSize; 552 553 case NETLOOP_FAIL: 554 return (-1); 555 } 556 } 557 } 558 559 /**********************************************************************/ 560 561 static void 562 startAgainTimeout(void) 563 { 564 NetState = NETLOOP_RESTART; 565 } 566 567 static void 568 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 569 { 570 /* Totally ignore the packet */ 571 } 572 573 void NetStartAgain (void) 574 { 575 char *nretry; 576 int noretry = 0, once = 0; 577 578 if ((nretry = getenv ("netretry")) != NULL) { 579 noretry = (strcmp (nretry, "no") == 0); 580 once = (strcmp (nretry, "once") == 0); 581 } 582 if (noretry) { 583 eth_halt (); 584 NetState = NETLOOP_FAIL; 585 return; 586 } 587 #ifndef CONFIG_NET_MULTI 588 NetSetTimeout (10 * CFG_HZ, startAgainTimeout); 589 NetSetHandler (startAgainHandler); 590 #else /* !CONFIG_NET_MULTI*/ 591 eth_halt (); 592 eth_try_another (!NetRestarted); 593 eth_init (gd->bd); 594 if (NetRestartWrap) { 595 NetRestartWrap = 0; 596 if (NetDevExists && !once) { 597 NetSetTimeout (10 * CFG_HZ, startAgainTimeout); 598 NetSetHandler (startAgainHandler); 599 } else { 600 NetState = NETLOOP_FAIL; 601 } 602 } else { 603 NetState = NETLOOP_RESTART; 604 } 605 #endif /* CONFIG_NET_MULTI */ 606 } 607 608 /**********************************************************************/ 609 /* 610 * Miscelaneous bits. 611 */ 612 613 void 614 NetSetHandler(rxhand_f * f) 615 { 616 packetHandler = f; 617 } 618 619 620 void 621 NetSetTimeout(ulong iv, thand_f * f) 622 { 623 if (iv == 0) { 624 timeHandler = (thand_f *)0; 625 } else { 626 timeHandler = f; 627 timeStart = get_timer(0); 628 timeDelta = iv; 629 } 630 } 631 632 633 void 634 NetSendPacket(volatile uchar * pkt, int len) 635 { 636 (void) eth_send(pkt, len); 637 } 638 639 int 640 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 641 { 642 uchar *pkt; 643 644 /* convert to new style broadcast */ 645 if (dest == 0) 646 dest = 0xFFFFFFFF; 647 648 /* if broadcast, make the ether address a broadcast and don't do ARP */ 649 if (dest == 0xFFFFFFFF) 650 ether = NetBcastAddr; 651 652 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 653 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 654 655 #ifdef ET_DEBUG 656 printf("sending ARP for %08lx\n", dest); 657 #endif 658 NetArpWaitPacketIP = dest; 659 NetArpWaitPacketMAC = ether; 660 661 pkt = NetArpWaitTxPacket; 662 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 663 664 NetSetIP (pkt, dest, dport, sport, len); 665 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 666 667 /* size of the waiting packet */ 668 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 669 670 /* and do the ARP request */ 671 NetArpWaitTry = 1; 672 NetArpWaitTimerStart = get_timer(0); 673 ArpRequest(); 674 return 1; /* waiting */ 675 } 676 677 #ifdef ET_DEBUG 678 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", 679 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); 680 #endif 681 682 pkt = (uchar *)NetTxPacket; 683 pkt += NetSetEther (pkt, ether, PROT_IP); 684 NetSetIP (pkt, dest, dport, sport, len); 685 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len); 686 687 return 0; /* transmitted */ 688 } 689 690 #if (CONFIG_COMMANDS & CFG_CMD_PING) 691 static ushort PingSeqNo; 692 693 int PingSend(void) 694 { 695 static uchar mac[6]; 696 volatile IP_t *ip; 697 volatile ushort *s; 698 uchar *pkt; 699 700 /* XXX always send arp request */ 701 702 memcpy(mac, NetEtherNullAddr, 6); 703 704 #ifdef ET_DEBUG 705 printf("sending ARP for %08lx\n", NetPingIP); 706 #endif 707 708 NetArpWaitPacketIP = NetPingIP; 709 NetArpWaitPacketMAC = mac; 710 711 pkt = NetArpWaitTxPacket; 712 pkt += NetSetEther(pkt, mac, PROT_IP); 713 714 ip = (volatile IP_t *)pkt; 715 716 /* 717 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 718 */ 719 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 720 ip->ip_tos = 0; 721 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 722 ip->ip_id = htons(NetIPID++); 723 ip->ip_off = htons(0x4000); /* No fragmentation */ 724 ip->ip_ttl = 255; 725 ip->ip_p = 0x01; /* ICMP */ 726 ip->ip_sum = 0; 727 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 728 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 729 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 730 731 s = &ip->udp_src; /* XXX ICMP starts here */ 732 s[0] = htons(0x0800); /* echo-request, code */ 733 s[1] = 0; /* checksum */ 734 s[2] = 0; /* identifier */ 735 s[3] = htons(PingSeqNo++); /* sequence number */ 736 s[1] = ~NetCksum((uchar *)s, 8/2); 737 738 /* size of the waiting packet */ 739 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 740 741 /* and do the ARP request */ 742 NetArpWaitTry = 1; 743 NetArpWaitTimerStart = get_timer(0); 744 ArpRequest(); 745 return 1; /* waiting */ 746 } 747 748 static void 749 PingTimeout (void) 750 { 751 eth_halt(); 752 NetState = NETLOOP_FAIL; /* we did not get the reply */ 753 } 754 755 static void 756 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 757 { 758 IPaddr_t tmp; 759 volatile IP_t *ip = (volatile IP_t *)pkt; 760 761 tmp = NetReadIP((void *)&ip->ip_src); 762 if (tmp != NetPingIP) 763 return; 764 765 NetState = NETLOOP_SUCCESS; 766 } 767 768 static void PingStart(void) 769 { 770 #if defined(CONFIG_NET_MULTI) 771 printf ("Using %s device\n", eth_get_name()); 772 #endif /* CONFIG_NET_MULTI */ 773 NetSetTimeout (10 * CFG_HZ, PingTimeout); 774 NetSetHandler (PingHandler); 775 776 PingSend(); 777 } 778 #endif /* CFG_CMD_PING */ 779 780 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 781 782 #define CDP_DEVICE_ID_TLV 0x0001 783 #define CDP_ADDRESS_TLV 0x0002 784 #define CDP_PORT_ID_TLV 0x0003 785 #define CDP_CAPABILITIES_TLV 0x0004 786 #define CDP_VERSION_TLV 0x0005 787 #define CDP_PLATFORM_TLV 0x0006 788 #define CDP_NATIVE_VLAN_TLV 0x000a 789 #define CDP_APPLIANCE_VLAN_TLV 0x000e 790 #define CDP_TRIGGER_TLV 0x000f 791 #define CDP_POWER_CONSUMPTION_TLV 0x0010 792 #define CDP_SYSNAME_TLV 0x0014 793 #define CDP_SYSOBJECT_TLV 0x0015 794 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 795 796 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */ 797 798 static int CDPSeq; 799 static int CDPOK; 800 801 ushort CDPNativeVLAN; 802 ushort CDPApplianceVLAN; 803 804 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 805 806 static ushort CDP_compute_csum(const uchar *buff, ushort len) 807 { 808 ushort csum; 809 int odd; 810 ulong result = 0; 811 ushort leftover; 812 ushort *p; 813 814 if (len > 0) { 815 odd = 1 & (ulong)buff; 816 if (odd) { 817 result = *buff << 8; 818 len--; 819 buff++; 820 } 821 while (len > 1) { 822 p = (ushort *)buff; 823 result += *p++; 824 buff = (uchar *)p; 825 if (result & 0x80000000) 826 result = (result & 0xFFFF) + (result >> 16); 827 len -= 2; 828 } 829 if (len) { 830 leftover = (signed short)(*(const signed char *)buff); 831 /* CISCO SUCKS big time! (and blows too): 832 * CDP uses the IP checksum algorithm with a twist; 833 * for the last byte it *sign* extends and sums. 834 */ 835 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 836 } 837 while (result >> 16) 838 result = (result & 0xFFFF) + (result >> 16); 839 840 if (odd) 841 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 842 } 843 844 /* add up 16-bit and 17-bit words for 17+c bits */ 845 result = (result & 0xffff) + (result >> 16); 846 /* add up 16-bit and 2-bit for 16+c bit */ 847 result = (result & 0xffff) + (result >> 16); 848 /* add up carry.. */ 849 result = (result & 0xffff) + (result >> 16); 850 851 /* negate */ 852 csum = ~(ushort)result; 853 854 /* run time endian detection */ 855 if (csum != htons(csum)) /* little endian */ 856 csum = htons(csum); 857 858 return csum; 859 } 860 861 int CDPSendTrigger(void) 862 { 863 volatile uchar *pkt; 864 volatile ushort *s; 865 volatile ushort *cp; 866 Ethernet_t *et; 867 int len; 868 ushort chksum; 869 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 870 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 871 char buf[32]; 872 #endif 873 874 pkt = NetTxPacket; 875 et = (Ethernet_t *)pkt; 876 877 /* NOTE: trigger sent not on any VLAN */ 878 879 /* form ethernet header */ 880 memcpy(et->et_dest, NetCDPAddr, 6); 881 memcpy(et->et_src, NetOurEther, 6); 882 883 pkt += ETHER_HDR_SIZE; 884 885 /* SNAP header */ 886 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 887 pkt += sizeof(CDP_SNAP_hdr); 888 889 /* CDP header */ 890 *pkt++ = 0x02; /* CDP version 2 */ 891 *pkt++ = 180; /* TTL */ 892 s = (volatile ushort *)pkt; 893 cp = s; 894 *s++ = htons(0); /* checksum (0 for later calculation) */ 895 896 /* CDP fields */ 897 #ifdef CONFIG_CDP_DEVICE_ID 898 *s++ = htons(CDP_DEVICE_ID_TLV); 899 *s++ = htons(CONFIG_CDP_DEVICE_ID); 900 memset(buf, 0, sizeof(buf)); 901 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 902 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 903 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 904 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 905 memcpy((uchar *)s, buf, 16); 906 s += 16 / 2; 907 #endif 908 909 #ifdef CONFIG_CDP_PORT_ID 910 *s++ = htons(CDP_PORT_ID_TLV); 911 memset(buf, 0, sizeof(buf)); 912 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 913 len = strlen(buf); 914 if (len & 1) /* make it even */ 915 len++; 916 *s++ = htons(len + 4); 917 memcpy((uchar *)s, buf, len); 918 s += len / 2; 919 #endif 920 921 #ifdef CONFIG_CDP_CAPABILITIES 922 *s++ = htons(CDP_CAPABILITIES_TLV); 923 *s++ = htons(8); 924 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 925 s += 2; 926 #endif 927 928 #ifdef CONFIG_CDP_VERSION 929 *s++ = htons(CDP_VERSION_TLV); 930 memset(buf, 0, sizeof(buf)); 931 strcpy(buf, CONFIG_CDP_VERSION); 932 len = strlen(buf); 933 if (len & 1) /* make it even */ 934 len++; 935 *s++ = htons(len + 4); 936 memcpy((uchar *)s, buf, len); 937 s += len / 2; 938 #endif 939 940 #ifdef CONFIG_CDP_PLATFORM 941 *s++ = htons(CDP_PLATFORM_TLV); 942 memset(buf, 0, sizeof(buf)); 943 strcpy(buf, CONFIG_CDP_PLATFORM); 944 len = strlen(buf); 945 if (len & 1) /* make it even */ 946 len++; 947 *s++ = htons(len + 4); 948 memcpy((uchar *)s, buf, len); 949 s += len / 2; 950 #endif 951 952 #ifdef CONFIG_CDP_TRIGGER 953 *s++ = htons(CDP_TRIGGER_TLV); 954 *s++ = htons(8); 955 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 956 s += 2; 957 #endif 958 959 #ifdef CONFIG_CDP_POWER_CONSUMPTION 960 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 961 *s++ = htons(6); 962 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 963 #endif 964 965 /* length of ethernet packet */ 966 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 967 et->et_protlen = htons(len); 968 969 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 970 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 971 if (chksum == 0) 972 chksum = 0xFFFF; 973 *cp = htons(chksum); 974 975 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 976 return 0; 977 } 978 979 static void 980 CDPTimeout (void) 981 { 982 CDPSeq++; 983 984 if (CDPSeq < 3) { 985 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 986 CDPSendTrigger(); 987 return; 988 } 989 990 /* if not OK try again */ 991 if (!CDPOK) 992 NetStartAgain(); 993 else 994 NetState = NETLOOP_SUCCESS; 995 } 996 997 static void 998 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 999 { 1000 /* nothing */ 1001 } 1002 1003 static void 1004 CDPHandler(const uchar * pkt, unsigned len) 1005 { 1006 const uchar *t; 1007 const ushort *ss; 1008 ushort type, tlen; 1009 uchar applid; 1010 ushort vlan, nvlan; 1011 1012 /* minimum size? */ 1013 if (len < sizeof(CDP_SNAP_hdr) + 4) 1014 goto pkt_short; 1015 1016 /* check for valid CDP SNAP header */ 1017 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1018 return; 1019 1020 pkt += sizeof(CDP_SNAP_hdr); 1021 len -= sizeof(CDP_SNAP_hdr); 1022 1023 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1024 if (pkt[0] < 0x02 || pkt[1] == 0) 1025 return; 1026 1027 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1028 if (pkt[0] != 0x02) 1029 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1030 pkt[0] & 0xff); 1031 1032 if (CDP_compute_csum(pkt, len) != 0) 1033 return; 1034 1035 pkt += 4; 1036 len -= 4; 1037 1038 vlan = htons(-1); 1039 nvlan = htons(-1); 1040 while (len > 0) { 1041 if (len < 4) 1042 goto pkt_short; 1043 1044 ss = (const ushort *)pkt; 1045 type = ntohs(ss[0]); 1046 tlen = ntohs(ss[1]); 1047 if (tlen > len) { 1048 goto pkt_short; 1049 } 1050 1051 pkt += tlen; 1052 len -= tlen; 1053 1054 ss += 2; /* point ss to the data of the TLV */ 1055 tlen -= 4; 1056 1057 switch (type) { 1058 case CDP_DEVICE_ID_TLV: 1059 break; 1060 case CDP_ADDRESS_TLV: 1061 break; 1062 case CDP_PORT_ID_TLV: 1063 break; 1064 case CDP_CAPABILITIES_TLV: 1065 break; 1066 case CDP_VERSION_TLV: 1067 break; 1068 case CDP_PLATFORM_TLV: 1069 break; 1070 case CDP_NATIVE_VLAN_TLV: 1071 nvlan = *ss; 1072 break; 1073 case CDP_APPLIANCE_VLAN_TLV: 1074 t = (const uchar *)ss; 1075 while (tlen > 0) { 1076 if (tlen < 3) 1077 goto pkt_short; 1078 1079 applid = t[0]; 1080 ss = (const ushort *)(t + 1); 1081 1082 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1083 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1084 vlan = *ss; 1085 #else 1086 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1087 #endif 1088 t += 3; tlen -= 3; 1089 } 1090 break; 1091 case CDP_TRIGGER_TLV: 1092 break; 1093 case CDP_POWER_CONSUMPTION_TLV: 1094 break; 1095 case CDP_SYSNAME_TLV: 1096 break; 1097 case CDP_SYSOBJECT_TLV: 1098 break; 1099 case CDP_MANAGEMENT_ADDRESS_TLV: 1100 break; 1101 } 1102 } 1103 1104 CDPApplianceVLAN = vlan; 1105 CDPNativeVLAN = nvlan; 1106 1107 CDPOK = 1; 1108 return; 1109 1110 pkt_short: 1111 printf("** CDP packet is too short\n"); 1112 return; 1113 } 1114 1115 static void CDPStart(void) 1116 { 1117 #if defined(CONFIG_NET_MULTI) 1118 printf ("Using %s device\n", eth_get_name()); 1119 #endif 1120 CDPSeq = 0; 1121 CDPOK = 0; 1122 1123 CDPNativeVLAN = htons(-1); 1124 CDPApplianceVLAN = htons(-1); 1125 1126 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1127 NetSetHandler (CDPDummyHandler); 1128 1129 CDPSendTrigger(); 1130 } 1131 #endif /* CFG_CMD_CDP */ 1132 1133 1134 void 1135 NetReceive(volatile uchar * inpkt, int len) 1136 { 1137 Ethernet_t *et; 1138 IP_t *ip; 1139 ARP_t *arp; 1140 IPaddr_t tmp; 1141 int x; 1142 uchar *pkt; 1143 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1144 int iscdp; 1145 #endif 1146 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1147 1148 #ifdef ET_DEBUG 1149 printf("packet received\n"); 1150 #endif 1151 1152 NetRxPkt = inpkt; 1153 NetRxPktLen = len; 1154 et = (Ethernet_t *)inpkt; 1155 1156 /* too small packet? */ 1157 if (len < ETHER_HDR_SIZE) 1158 return; 1159 1160 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1161 /* keep track if packet is CDP */ 1162 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1163 #endif 1164 1165 myvlanid = ntohs(NetOurVLAN); 1166 if (myvlanid == (ushort)-1) 1167 myvlanid = VLAN_NONE; 1168 mynvlanid = ntohs(NetOurNativeVLAN); 1169 if (mynvlanid == (ushort)-1) 1170 mynvlanid = VLAN_NONE; 1171 1172 x = ntohs(et->et_protlen); 1173 1174 #ifdef ET_DEBUG 1175 printf("packet received\n"); 1176 #endif 1177 1178 if (x < 1514) { 1179 /* 1180 * Got a 802 packet. Check the other protocol field. 1181 */ 1182 x = ntohs(et->et_prot); 1183 1184 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1185 len -= E802_HDR_SIZE; 1186 1187 } else if (x != PROT_VLAN) { /* normal packet */ 1188 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1189 len -= ETHER_HDR_SIZE; 1190 1191 } else { /* VLAN packet */ 1192 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1193 1194 #ifdef ET_DEBUG 1195 printf("VLAN packet received\n"); 1196 #endif 1197 /* too small packet? */ 1198 if (len < VLAN_ETHER_HDR_SIZE) 1199 return; 1200 1201 /* if no VLAN active */ 1202 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1203 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1204 && iscdp == 0 1205 #endif 1206 ) 1207 return; 1208 1209 cti = ntohs(vet->vet_tag); 1210 vlanid = cti & VLAN_IDMASK; 1211 x = ntohs(vet->vet_type); 1212 1213 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1214 len -= VLAN_ETHER_HDR_SIZE; 1215 } 1216 1217 #ifdef ET_DEBUG 1218 printf("Receive from protocol 0x%x\n", x); 1219 #endif 1220 1221 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1222 if (iscdp) { 1223 CDPHandler((uchar *)ip, len); 1224 return; 1225 } 1226 #endif 1227 1228 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1229 if (vlanid == VLAN_NONE) 1230 vlanid = (mynvlanid & VLAN_IDMASK); 1231 /* not matched? */ 1232 if (vlanid != (myvlanid & VLAN_IDMASK)) 1233 return; 1234 } 1235 1236 switch (x) { 1237 1238 case PROT_ARP: 1239 /* 1240 * We have to deal with two types of ARP packets: 1241 * - REQUEST packets will be answered by sending our 1242 * IP address - if we know it. 1243 * - REPLY packates are expected only after we asked 1244 * for the TFTP server's or the gateway's ethernet 1245 * address; so if we receive such a packet, we set 1246 * the server ethernet address 1247 */ 1248 #ifdef ET_DEBUG 1249 puts ("Got ARP\n"); 1250 #endif 1251 arp = (ARP_t *)ip; 1252 if (len < ARP_HDR_SIZE) { 1253 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1254 return; 1255 } 1256 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1257 return; 1258 } 1259 if (ntohs(arp->ar_pro) != PROT_IP) { 1260 return; 1261 } 1262 if (arp->ar_hln != 6) { 1263 return; 1264 } 1265 if (arp->ar_pln != 4) { 1266 return; 1267 } 1268 1269 if (NetOurIP == 0) { 1270 return; 1271 } 1272 1273 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1274 return; 1275 } 1276 1277 switch (ntohs(arp->ar_op)) { 1278 case ARPOP_REQUEST: /* reply with our IP address */ 1279 #ifdef ET_DEBUG 1280 puts ("Got ARP REQUEST, return our IP\n"); 1281 #endif 1282 pkt = (uchar *)et; 1283 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1284 arp->ar_op = htons(ARPOP_REPLY); 1285 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1286 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1287 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1288 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1289 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1290 return; 1291 1292 case ARPOP_REPLY: /* arp reply */ 1293 /* are we waiting for a reply */ 1294 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1295 break; 1296 #ifdef ET_DEBUG 1297 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1298 arp->ar_data[0], arp->ar_data[1], 1299 arp->ar_data[2], arp->ar_data[3], 1300 arp->ar_data[4], arp->ar_data[5]); 1301 #endif 1302 1303 tmp = NetReadIP(&arp->ar_data[6]); 1304 1305 /* matched waiting packet's address */ 1306 if (tmp == NetArpWaitReplyIP) { 1307 #ifdef ET_DEBUG 1308 puts ("Got it\n"); 1309 #endif 1310 /* save address for later use */ 1311 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1312 1313 #ifdef CONFIG_NETCONSOLE 1314 (*packetHandler)(0,0,0,0); 1315 #endif 1316 /* modify header, and transmit it */ 1317 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1318 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1319 1320 /* no arp request pending now */ 1321 NetArpWaitPacketIP = 0; 1322 NetArpWaitTxPacketSize = 0; 1323 NetArpWaitPacketMAC = NULL; 1324 1325 } 1326 return; 1327 default: 1328 #ifdef ET_DEBUG 1329 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1330 #endif 1331 return; 1332 } 1333 break; 1334 1335 case PROT_RARP: 1336 #ifdef ET_DEBUG 1337 puts ("Got RARP\n"); 1338 #endif 1339 arp = (ARP_t *)ip; 1340 if (len < ARP_HDR_SIZE) { 1341 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1342 return; 1343 } 1344 1345 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1346 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1347 (ntohs(arp->ar_pro) != PROT_IP) || 1348 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1349 1350 puts ("invalid RARP header\n"); 1351 } else { 1352 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1353 if (NetServerIP == 0) 1354 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1355 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1356 1357 (*packetHandler)(0,0,0,0); 1358 } 1359 break; 1360 1361 case PROT_IP: 1362 #ifdef ET_DEBUG 1363 puts ("Got IP\n"); 1364 #endif 1365 if (len < IP_HDR_SIZE) { 1366 debug ("len bad %d < %d\n", len, IP_HDR_SIZE); 1367 return; 1368 } 1369 if (len < ntohs(ip->ip_len)) { 1370 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1371 return; 1372 } 1373 len = ntohs(ip->ip_len); 1374 #ifdef ET_DEBUG 1375 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1376 #endif 1377 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1378 return; 1379 } 1380 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ 1381 return; 1382 } 1383 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1384 puts ("checksum bad\n"); 1385 return; 1386 } 1387 tmp = NetReadIP(&ip->ip_dst); 1388 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1389 return; 1390 } 1391 /* 1392 * watch for ICMP host redirects 1393 * 1394 * There is no real handler code (yet). We just watch 1395 * for ICMP host redirect messages. In case anybody 1396 * sees these messages: please contact me 1397 * (wd@denx.de), or - even better - send me the 1398 * necessary fixes :-) 1399 * 1400 * Note: in all cases where I have seen this so far 1401 * it was a problem with the router configuration, 1402 * for instance when a router was configured in the 1403 * BOOTP reply, but the TFTP server was on the same 1404 * subnet. So this is probably a warning that your 1405 * configuration might be wrong. But I'm not really 1406 * sure if there aren't any other situations. 1407 */ 1408 if (ip->ip_p == IPPROTO_ICMP) { 1409 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1410 1411 switch (icmph->type) { 1412 case ICMP_REDIRECT: 1413 if (icmph->code != ICMP_REDIR_HOST) 1414 return; 1415 puts (" ICMP Host Redirect to "); 1416 print_IPaddr(icmph->un.gateway); 1417 putc(' '); 1418 return; 1419 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1420 case ICMP_ECHO_REPLY: 1421 /* 1422 * IP header OK. Pass the packet to the current handler. 1423 */ 1424 /* XXX point to ip packet */ 1425 (*packetHandler)((uchar *)ip, 0, 0, 0); 1426 return; 1427 case ICMP_ECHO_REQUEST: 1428 #ifdef ET_DEBUG 1429 printf ("Got ICMP ECHO REQUEST, return %d bytes \n", 1430 ETHER_HDR_SIZE + len); 1431 #endif 1432 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1433 memcpy (&et->et_src[ 0], NetOurEther, 6); 1434 1435 ip->ip_sum = 0; 1436 ip->ip_off = 0; 1437 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1438 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1439 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1440 1441 icmph->type = ICMP_ECHO_REPLY; 1442 icmph->checksum = 0; 1443 icmph->checksum = ~NetCksum((uchar *)icmph, 1444 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1445 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1446 return; 1447 #endif 1448 default: 1449 return; 1450 } 1451 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1452 return; 1453 } 1454 1455 #ifdef CONFIG_UDP_CHECKSUM 1456 if (ip->udp_xsum != 0) { 1457 ulong xsum; 1458 ushort *sumptr; 1459 ushort sumlen; 1460 1461 xsum = ip->ip_p; 1462 xsum += (ntohs(ip->udp_len)); 1463 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1464 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1465 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1466 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1467 1468 sumlen = ntohs(ip->udp_len); 1469 sumptr = (ushort *) &(ip->udp_src); 1470 1471 while (sumlen > 1) { 1472 ushort sumdata; 1473 1474 sumdata = *sumptr++; 1475 xsum += ntohs(sumdata); 1476 sumlen -= 2; 1477 } 1478 if (sumlen > 0) { 1479 ushort sumdata; 1480 1481 sumdata = *(unsigned char *) sumptr; 1482 sumdata = (sumdata << 8) & 0xff00; 1483 xsum += sumdata; 1484 } 1485 while ((xsum >> 16) != 0) { 1486 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1487 } 1488 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1489 printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum)); 1490 return; 1491 } 1492 } 1493 #endif 1494 1495 #ifdef CONFIG_NETCONSOLE 1496 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1497 ntohs(ip->udp_dst), 1498 ntohs(ip->udp_src), 1499 ntohs(ip->udp_len) - 8); 1500 #endif 1501 /* 1502 * IP header OK. Pass the packet to the current handler. 1503 */ 1504 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1505 ntohs(ip->udp_dst), 1506 ntohs(ip->udp_src), 1507 ntohs(ip->udp_len) - 8); 1508 break; 1509 } 1510 } 1511 1512 1513 /**********************************************************************/ 1514 1515 static int net_check_prereq (proto_t protocol) 1516 { 1517 switch (protocol) { 1518 /* Fall through */ 1519 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1520 case PING: 1521 if (NetPingIP == 0) { 1522 puts ("*** ERROR: ping address not given\n"); 1523 return (1); 1524 } 1525 goto common; 1526 #endif 1527 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 1528 case SNTP: 1529 if (NetNtpServerIP == 0) { 1530 puts ("*** ERROR: NTP server address not given\n"); 1531 return (1); 1532 } 1533 goto common; 1534 #endif 1535 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 1536 case NFS: 1537 #endif 1538 case NETCONS: 1539 case TFTP: 1540 if (NetServerIP == 0) { 1541 puts ("*** ERROR: `serverip' not set\n"); 1542 return (1); 1543 } 1544 #if (CONFIG_COMMANDS & (CFG_CMD_PING | CFG_CMD_SNTP)) 1545 common: 1546 #endif 1547 1548 if (NetOurIP == 0) { 1549 puts ("*** ERROR: `ipaddr' not set\n"); 1550 return (1); 1551 } 1552 /* Fall through */ 1553 1554 case DHCP: 1555 case RARP: 1556 case BOOTP: 1557 case CDP: 1558 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1559 #ifdef CONFIG_NET_MULTI 1560 extern int eth_get_dev_index (void); 1561 int num = eth_get_dev_index (); 1562 1563 switch (num) { 1564 case -1: 1565 puts ("*** ERROR: No ethernet found.\n"); 1566 return (1); 1567 case 0: 1568 puts ("*** ERROR: `ethaddr' not set\n"); 1569 break; 1570 default: 1571 printf ("*** ERROR: `eth%daddr' not set\n", 1572 num); 1573 break; 1574 } 1575 1576 NetStartAgain (); 1577 return (2); 1578 #else 1579 puts ("*** ERROR: `ethaddr' not set\n"); 1580 return (1); 1581 #endif 1582 } 1583 /* Fall through */ 1584 default: 1585 return (0); 1586 } 1587 return (0); /* OK */ 1588 } 1589 /**********************************************************************/ 1590 1591 int 1592 NetCksumOk(uchar * ptr, int len) 1593 { 1594 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1595 } 1596 1597 1598 unsigned 1599 NetCksum(uchar * ptr, int len) 1600 { 1601 ulong xsum; 1602 ushort *p = (ushort *)ptr; 1603 1604 xsum = 0; 1605 while (len-- > 0) 1606 xsum += *p++; 1607 xsum = (xsum & 0xffff) + (xsum >> 16); 1608 xsum = (xsum & 0xffff) + (xsum >> 16); 1609 return (xsum & 0xffff); 1610 } 1611 1612 int 1613 NetEthHdrSize(void) 1614 { 1615 ushort myvlanid; 1616 1617 myvlanid = ntohs(NetOurVLAN); 1618 if (myvlanid == (ushort)-1) 1619 myvlanid = VLAN_NONE; 1620 1621 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1622 } 1623 1624 int 1625 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1626 { 1627 Ethernet_t *et = (Ethernet_t *)xet; 1628 ushort myvlanid; 1629 1630 myvlanid = ntohs(NetOurVLAN); 1631 if (myvlanid == (ushort)-1) 1632 myvlanid = VLAN_NONE; 1633 1634 memcpy (et->et_dest, addr, 6); 1635 memcpy (et->et_src, NetOurEther, 6); 1636 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1637 et->et_protlen = htons(prot); 1638 return ETHER_HDR_SIZE; 1639 } else { 1640 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1641 1642 vet->vet_vlan_type = htons(PROT_VLAN); 1643 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1644 vet->vet_type = htons(prot); 1645 return VLAN_ETHER_HDR_SIZE; 1646 } 1647 } 1648 1649 void 1650 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1651 { 1652 volatile IP_t *ip = (IP_t *)xip; 1653 1654 /* 1655 * If the data is an odd number of bytes, zero the 1656 * byte after the last byte so that the checksum 1657 * will work. 1658 */ 1659 if (len & 1) 1660 xip[IP_HDR_SIZE + len] = 0; 1661 1662 /* 1663 * Construct an IP and UDP header. 1664 * (need to set no fragment bit - XXX) 1665 */ 1666 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1667 ip->ip_tos = 0; 1668 ip->ip_len = htons(IP_HDR_SIZE + len); 1669 ip->ip_id = htons(NetIPID++); 1670 ip->ip_off = htons(0x4000); /* No fragmentation */ 1671 ip->ip_ttl = 255; 1672 ip->ip_p = 17; /* UDP */ 1673 ip->ip_sum = 0; 1674 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1675 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1676 ip->udp_src = htons(sport); 1677 ip->udp_dst = htons(dport); 1678 ip->udp_len = htons(8 + len); 1679 ip->udp_xsum = 0; 1680 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1681 } 1682 1683 void copy_filename (char *dst, char *src, int size) 1684 { 1685 if (*src && (*src == '"')) { 1686 ++src; 1687 --size; 1688 } 1689 1690 while ((--size > 0) && *src && (*src != '"')) { 1691 *dst++ = *src++; 1692 } 1693 *dst = '\0'; 1694 } 1695 1696 #endif /* CFG_CMD_NET */ 1697 1698 void ip_to_string (IPaddr_t x, char *s) 1699 { 1700 x = ntohl (x); 1701 sprintf (s, "%d.%d.%d.%d", 1702 (int) ((x >> 24) & 0xff), 1703 (int) ((x >> 16) & 0xff), 1704 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1705 ); 1706 } 1707 1708 IPaddr_t string_to_ip(char *s) 1709 { 1710 IPaddr_t addr; 1711 char *e; 1712 int i; 1713 1714 if (s == NULL) 1715 return(0); 1716 1717 for (addr=0, i=0; i<4; ++i) { 1718 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1719 addr <<= 8; 1720 addr |= (val & 0xFF); 1721 if (s) { 1722 s = (*e) ? e+1 : e; 1723 } 1724 } 1725 1726 return (htonl(addr)); 1727 } 1728 1729 void VLAN_to_string(ushort x, char *s) 1730 { 1731 x = ntohs(x); 1732 1733 if (x == (ushort)-1) 1734 x = VLAN_NONE; 1735 1736 if (x == VLAN_NONE) 1737 strcpy(s, "none"); 1738 else 1739 sprintf(s, "%d", x & VLAN_IDMASK); 1740 } 1741 1742 ushort string_to_VLAN(char *s) 1743 { 1744 ushort id; 1745 1746 if (s == NULL) 1747 return htons(VLAN_NONE); 1748 1749 if (*s < '0' || *s > '9') 1750 id = VLAN_NONE; 1751 else 1752 id = (ushort)simple_strtoul(s, NULL, 10); 1753 1754 return htons(id); 1755 } 1756 1757 void print_IPaddr (IPaddr_t x) 1758 { 1759 char tmp[16]; 1760 1761 ip_to_string (x, tmp); 1762 1763 puts (tmp); 1764 } 1765 1766 IPaddr_t getenv_IPaddr (char *var) 1767 { 1768 return (string_to_ip(getenv(var))); 1769 } 1770 1771 ushort getenv_VLAN(char *var) 1772 { 1773 return (string_to_VLAN(getenv(var))); 1774 } 1775