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