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(eth_get_dev()->name, 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(eth_get_dev()->name, 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 /* CISCO SUCKS big time! (and blows too): 833 * CDP uses the IP checksum algorithm with a twist; 834 * for the last byte it *sign* extends and sums. 835 */ 836 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 837 } 838 while (result >> 16) 839 result = (result & 0xFFFF) + (result >> 16); 840 841 if (odd) 842 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 843 } 844 845 /* add up 16-bit and 17-bit words for 17+c bits */ 846 result = (result & 0xffff) + (result >> 16); 847 /* add up 16-bit and 2-bit for 16+c bit */ 848 result = (result & 0xffff) + (result >> 16); 849 /* add up carry.. */ 850 result = (result & 0xffff) + (result >> 16); 851 852 /* negate */ 853 csum = ~(ushort)result; 854 855 /* run time endian detection */ 856 if (csum != htons(csum)) /* little endian */ 857 csum = htons(csum); 858 859 return csum; 860 } 861 862 int CDPSendTrigger(void) 863 { 864 volatile uchar *pkt; 865 volatile ushort *s; 866 volatile ushort *cp; 867 Ethernet_t *et; 868 int len; 869 ushort chksum; 870 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 871 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 872 char buf[32]; 873 #endif 874 875 pkt = NetTxPacket; 876 et = (Ethernet_t *)pkt; 877 878 /* NOTE: trigger sent not on any VLAN */ 879 880 /* form ethernet header */ 881 memcpy(et->et_dest, NetCDPAddr, 6); 882 memcpy(et->et_src, NetOurEther, 6); 883 884 pkt += ETHER_HDR_SIZE; 885 886 /* SNAP header */ 887 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 888 pkt += sizeof(CDP_SNAP_hdr); 889 890 /* CDP header */ 891 *pkt++ = 0x02; /* CDP version 2 */ 892 *pkt++ = 180; /* TTL */ 893 s = (volatile ushort *)pkt; 894 cp = s; 895 *s++ = htons(0); /* checksum (0 for later calculation) */ 896 897 /* CDP fields */ 898 #ifdef CONFIG_CDP_DEVICE_ID 899 *s++ = htons(CDP_DEVICE_ID_TLV); 900 *s++ = htons(CONFIG_CDP_DEVICE_ID); 901 memset(buf, 0, sizeof(buf)); 902 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X", 903 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff, 904 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff, 905 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff); 906 memcpy((uchar *)s, buf, 16); 907 s += 16 / 2; 908 #endif 909 910 #ifdef CONFIG_CDP_PORT_ID 911 *s++ = htons(CDP_PORT_ID_TLV); 912 memset(buf, 0, sizeof(buf)); 913 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 914 len = strlen(buf); 915 if (len & 1) /* make it even */ 916 len++; 917 *s++ = htons(len + 4); 918 memcpy((uchar *)s, buf, len); 919 s += len / 2; 920 #endif 921 922 #ifdef CONFIG_CDP_CAPABILITIES 923 *s++ = htons(CDP_CAPABILITIES_TLV); 924 *s++ = htons(8); 925 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 926 s += 2; 927 #endif 928 929 #ifdef CONFIG_CDP_VERSION 930 *s++ = htons(CDP_VERSION_TLV); 931 memset(buf, 0, sizeof(buf)); 932 strcpy(buf, CONFIG_CDP_VERSION); 933 len = strlen(buf); 934 if (len & 1) /* make it even */ 935 len++; 936 *s++ = htons(len + 4); 937 memcpy((uchar *)s, buf, len); 938 s += len / 2; 939 #endif 940 941 #ifdef CONFIG_CDP_PLATFORM 942 *s++ = htons(CDP_PLATFORM_TLV); 943 memset(buf, 0, sizeof(buf)); 944 strcpy(buf, CONFIG_CDP_PLATFORM); 945 len = strlen(buf); 946 if (len & 1) /* make it even */ 947 len++; 948 *s++ = htons(len + 4); 949 memcpy((uchar *)s, buf, len); 950 s += len / 2; 951 #endif 952 953 #ifdef CONFIG_CDP_TRIGGER 954 *s++ = htons(CDP_TRIGGER_TLV); 955 *s++ = htons(8); 956 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 957 s += 2; 958 #endif 959 960 #ifdef CONFIG_CDP_POWER_CONSUMPTION 961 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 962 *s++ = htons(6); 963 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 964 #endif 965 966 /* length of ethernet packet */ 967 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 968 et->et_protlen = htons(len); 969 970 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 971 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 972 if (chksum == 0) 973 chksum = 0xFFFF; 974 *cp = htons(chksum); 975 976 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 977 return 0; 978 } 979 980 static void 981 CDPTimeout (void) 982 { 983 CDPSeq++; 984 985 if (CDPSeq < 3) { 986 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 987 CDPSendTrigger(); 988 return; 989 } 990 991 /* if not OK try again */ 992 if (!CDPOK) 993 NetStartAgain(); 994 else 995 NetState = NETLOOP_SUCCESS; 996 } 997 998 static void 999 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 1000 { 1001 /* nothing */ 1002 } 1003 1004 static void 1005 CDPHandler(const uchar * pkt, unsigned len) 1006 { 1007 const uchar *t; 1008 const ushort *ss; 1009 ushort type, tlen; 1010 uchar applid; 1011 ushort vlan, nvlan; 1012 1013 /* minimum size? */ 1014 if (len < sizeof(CDP_SNAP_hdr) + 4) 1015 goto pkt_short; 1016 1017 /* check for valid CDP SNAP header */ 1018 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1019 return; 1020 1021 pkt += sizeof(CDP_SNAP_hdr); 1022 len -= sizeof(CDP_SNAP_hdr); 1023 1024 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1025 if (pkt[0] < 0x02 || pkt[1] == 0) 1026 return; 1027 1028 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1029 if (pkt[0] != 0x02) 1030 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1031 pkt[0] & 0xff); 1032 1033 if (CDP_compute_csum(pkt, len) != 0) 1034 return; 1035 1036 pkt += 4; 1037 len -= 4; 1038 1039 vlan = htons(-1); 1040 nvlan = htons(-1); 1041 while (len > 0) { 1042 if (len < 4) 1043 goto pkt_short; 1044 1045 ss = (const ushort *)pkt; 1046 type = ntohs(ss[0]); 1047 tlen = ntohs(ss[1]); 1048 if (tlen > len) { 1049 goto pkt_short; 1050 } 1051 1052 pkt += tlen; 1053 len -= tlen; 1054 1055 ss += 2; /* point ss to the data of the TLV */ 1056 tlen -= 4; 1057 1058 switch (type) { 1059 case CDP_DEVICE_ID_TLV: 1060 break; 1061 case CDP_ADDRESS_TLV: 1062 break; 1063 case CDP_PORT_ID_TLV: 1064 break; 1065 case CDP_CAPABILITIES_TLV: 1066 break; 1067 case CDP_VERSION_TLV: 1068 break; 1069 case CDP_PLATFORM_TLV: 1070 break; 1071 case CDP_NATIVE_VLAN_TLV: 1072 nvlan = *ss; 1073 break; 1074 case CDP_APPLIANCE_VLAN_TLV: 1075 t = (const uchar *)ss; 1076 while (tlen > 0) { 1077 if (tlen < 3) 1078 goto pkt_short; 1079 1080 applid = t[0]; 1081 ss = (const ushort *)(t + 1); 1082 1083 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1084 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1085 vlan = *ss; 1086 #else 1087 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1088 #endif 1089 t += 3; tlen -= 3; 1090 } 1091 break; 1092 case CDP_TRIGGER_TLV: 1093 break; 1094 case CDP_POWER_CONSUMPTION_TLV: 1095 break; 1096 case CDP_SYSNAME_TLV: 1097 break; 1098 case CDP_SYSOBJECT_TLV: 1099 break; 1100 case CDP_MANAGEMENT_ADDRESS_TLV: 1101 break; 1102 } 1103 } 1104 1105 CDPApplianceVLAN = vlan; 1106 CDPNativeVLAN = nvlan; 1107 1108 CDPOK = 1; 1109 return; 1110 1111 pkt_short: 1112 printf("** CDP packet is too short\n"); 1113 return; 1114 } 1115 1116 static void CDPStart(void) 1117 { 1118 #if defined(CONFIG_NET_MULTI) 1119 printf ("Using %s device\n", eth_get_name()); 1120 #endif 1121 CDPSeq = 0; 1122 CDPOK = 0; 1123 1124 CDPNativeVLAN = htons(-1); 1125 CDPApplianceVLAN = htons(-1); 1126 1127 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1128 NetSetHandler (CDPDummyHandler); 1129 1130 CDPSendTrigger(); 1131 } 1132 #endif /* CFG_CMD_CDP */ 1133 1134 1135 void 1136 NetReceive(volatile uchar * inpkt, int len) 1137 { 1138 Ethernet_t *et; 1139 IP_t *ip; 1140 ARP_t *arp; 1141 IPaddr_t tmp; 1142 int x; 1143 uchar *pkt; 1144 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1145 int iscdp; 1146 #endif 1147 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1148 1149 #ifdef ET_DEBUG 1150 printf("packet received\n"); 1151 #endif 1152 1153 NetRxPkt = inpkt; 1154 NetRxPktLen = len; 1155 et = (Ethernet_t *)inpkt; 1156 1157 /* too small packet? */ 1158 if (len < ETHER_HDR_SIZE) 1159 return; 1160 1161 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1162 /* keep track if packet is CDP */ 1163 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1164 #endif 1165 1166 myvlanid = ntohs(NetOurVLAN); 1167 if (myvlanid == (ushort)-1) 1168 myvlanid = VLAN_NONE; 1169 mynvlanid = ntohs(NetOurNativeVLAN); 1170 if (mynvlanid == (ushort)-1) 1171 mynvlanid = VLAN_NONE; 1172 1173 x = ntohs(et->et_protlen); 1174 1175 #ifdef ET_DEBUG 1176 printf("packet received\n"); 1177 #endif 1178 1179 if (x < 1514) { 1180 /* 1181 * Got a 802 packet. Check the other protocol field. 1182 */ 1183 x = ntohs(et->et_prot); 1184 1185 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1186 len -= E802_HDR_SIZE; 1187 1188 } else if (x != PROT_VLAN) { /* normal packet */ 1189 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1190 len -= ETHER_HDR_SIZE; 1191 1192 } else { /* VLAN packet */ 1193 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1194 1195 #ifdef ET_DEBUG 1196 printf("VLAN packet received\n"); 1197 #endif 1198 /* too small packet? */ 1199 if (len < VLAN_ETHER_HDR_SIZE) 1200 return; 1201 1202 /* if no VLAN active */ 1203 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1204 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1205 && iscdp == 0 1206 #endif 1207 ) 1208 return; 1209 1210 cti = ntohs(vet->vet_tag); 1211 vlanid = cti & VLAN_IDMASK; 1212 x = ntohs(vet->vet_type); 1213 1214 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1215 len -= VLAN_ETHER_HDR_SIZE; 1216 } 1217 1218 #ifdef ET_DEBUG 1219 printf("Receive from protocol 0x%x\n", x); 1220 #endif 1221 1222 #if (CONFIG_COMMANDS & CFG_CMD_CDP) 1223 if (iscdp) { 1224 CDPHandler((uchar *)ip, len); 1225 return; 1226 } 1227 #endif 1228 1229 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1230 if (vlanid == VLAN_NONE) 1231 vlanid = (mynvlanid & VLAN_IDMASK); 1232 /* not matched? */ 1233 if (vlanid != (myvlanid & VLAN_IDMASK)) 1234 return; 1235 } 1236 1237 switch (x) { 1238 1239 case PROT_ARP: 1240 /* 1241 * We have to deal with two types of ARP packets: 1242 * - REQUEST packets will be answered by sending our 1243 * IP address - if we know it. 1244 * - REPLY packates are expected only after we asked 1245 * for the TFTP server's or the gateway's ethernet 1246 * address; so if we receive such a packet, we set 1247 * the server ethernet address 1248 */ 1249 #ifdef ET_DEBUG 1250 puts ("Got ARP\n"); 1251 #endif 1252 arp = (ARP_t *)ip; 1253 if (len < ARP_HDR_SIZE) { 1254 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1255 return; 1256 } 1257 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1258 return; 1259 } 1260 if (ntohs(arp->ar_pro) != PROT_IP) { 1261 return; 1262 } 1263 if (arp->ar_hln != 6) { 1264 return; 1265 } 1266 if (arp->ar_pln != 4) { 1267 return; 1268 } 1269 1270 if (NetOurIP == 0) { 1271 return; 1272 } 1273 1274 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1275 return; 1276 } 1277 1278 switch (ntohs(arp->ar_op)) { 1279 case ARPOP_REQUEST: /* reply with our IP address */ 1280 #ifdef ET_DEBUG 1281 puts ("Got ARP REQUEST, return our IP\n"); 1282 #endif 1283 pkt = (uchar *)et; 1284 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1285 arp->ar_op = htons(ARPOP_REPLY); 1286 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1287 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1288 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1289 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1290 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1291 return; 1292 1293 case ARPOP_REPLY: /* arp reply */ 1294 /* are we waiting for a reply */ 1295 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1296 break; 1297 #ifdef ET_DEBUG 1298 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", 1299 arp->ar_data[0], arp->ar_data[1], 1300 arp->ar_data[2], arp->ar_data[3], 1301 arp->ar_data[4], arp->ar_data[5]); 1302 #endif 1303 1304 tmp = NetReadIP(&arp->ar_data[6]); 1305 1306 /* matched waiting packet's address */ 1307 if (tmp == NetArpWaitReplyIP) { 1308 #ifdef ET_DEBUG 1309 puts ("Got it\n"); 1310 #endif 1311 /* save address for later use */ 1312 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1313 1314 #ifdef CONFIG_NETCONSOLE 1315 (*packetHandler)(0,0,0,0); 1316 #endif 1317 /* modify header, and transmit it */ 1318 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1319 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1320 1321 /* no arp request pending now */ 1322 NetArpWaitPacketIP = 0; 1323 NetArpWaitTxPacketSize = 0; 1324 NetArpWaitPacketMAC = NULL; 1325 1326 } 1327 return; 1328 default: 1329 #ifdef ET_DEBUG 1330 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1331 #endif 1332 return; 1333 } 1334 break; 1335 1336 case PROT_RARP: 1337 #ifdef ET_DEBUG 1338 puts ("Got RARP\n"); 1339 #endif 1340 arp = (ARP_t *)ip; 1341 if (len < ARP_HDR_SIZE) { 1342 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1343 return; 1344 } 1345 1346 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1347 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1348 (ntohs(arp->ar_pro) != PROT_IP) || 1349 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1350 1351 puts ("invalid RARP header\n"); 1352 } else { 1353 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1354 if (NetServerIP == 0) 1355 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1356 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1357 1358 (*packetHandler)(0,0,0,0); 1359 } 1360 break; 1361 1362 case PROT_IP: 1363 #ifdef ET_DEBUG 1364 puts ("Got IP\n"); 1365 #endif 1366 if (len < IP_HDR_SIZE) { 1367 debug ("len bad %d < %d\n", len, IP_HDR_SIZE); 1368 return; 1369 } 1370 if (len < ntohs(ip->ip_len)) { 1371 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1372 return; 1373 } 1374 len = ntohs(ip->ip_len); 1375 #ifdef ET_DEBUG 1376 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1377 #endif 1378 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1379 return; 1380 } 1381 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ 1382 return; 1383 } 1384 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1385 puts ("checksum bad\n"); 1386 return; 1387 } 1388 tmp = NetReadIP(&ip->ip_dst); 1389 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1390 return; 1391 } 1392 /* 1393 * watch for ICMP host redirects 1394 * 1395 * There is no real handler code (yet). We just watch 1396 * for ICMP host redirect messages. In case anybody 1397 * sees these messages: please contact me 1398 * (wd@denx.de), or - even better - send me the 1399 * necessary fixes :-) 1400 * 1401 * Note: in all cases where I have seen this so far 1402 * it was a problem with the router configuration, 1403 * for instance when a router was configured in the 1404 * BOOTP reply, but the TFTP server was on the same 1405 * subnet. So this is probably a warning that your 1406 * configuration might be wrong. But I'm not really 1407 * sure if there aren't any other situations. 1408 */ 1409 if (ip->ip_p == IPPROTO_ICMP) { 1410 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1411 1412 switch (icmph->type) { 1413 case ICMP_REDIRECT: 1414 if (icmph->code != ICMP_REDIR_HOST) 1415 return; 1416 puts (" ICMP Host Redirect to "); 1417 print_IPaddr(icmph->un.gateway); 1418 putc(' '); 1419 return; 1420 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1421 case ICMP_ECHO_REPLY: 1422 /* 1423 * IP header OK. Pass the packet to the current handler. 1424 */ 1425 /* XXX point to ip packet */ 1426 (*packetHandler)((uchar *)ip, 0, 0, 0); 1427 return; 1428 #endif 1429 default: 1430 return; 1431 } 1432 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1433 return; 1434 } 1435 1436 #ifdef CONFIG_UDP_CHECKSUM 1437 if (ip->udp_xsum != 0) { 1438 ulong xsum; 1439 ushort *sumptr; 1440 ushort sumlen; 1441 1442 xsum = ip->ip_p; 1443 xsum += (ntohs(ip->udp_len)); 1444 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1445 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1446 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1447 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1448 1449 sumlen = ntohs(ip->udp_len); 1450 sumptr = (ushort *) &(ip->udp_src); 1451 1452 while (sumlen > 1) { 1453 ushort sumdata; 1454 1455 sumdata = *sumptr++; 1456 xsum += ntohs(sumdata); 1457 sumlen -= 2; 1458 } 1459 if (sumlen > 0) { 1460 ushort sumdata; 1461 1462 sumdata = *(unsigned char *) sumptr; 1463 sumdata = (sumdata << 8) & 0xff00; 1464 xsum += sumdata; 1465 } 1466 while ((xsum >> 16) != 0) { 1467 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1468 } 1469 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1470 printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum)); 1471 return; 1472 } 1473 } 1474 #endif 1475 1476 #ifdef CONFIG_NETCONSOLE 1477 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1478 ntohs(ip->udp_dst), 1479 ntohs(ip->udp_src), 1480 ntohs(ip->udp_len) - 8); 1481 #endif 1482 /* 1483 * IP header OK. Pass the packet to the current handler. 1484 */ 1485 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1486 ntohs(ip->udp_dst), 1487 ntohs(ip->udp_src), 1488 ntohs(ip->udp_len) - 8); 1489 break; 1490 } 1491 } 1492 1493 1494 /**********************************************************************/ 1495 1496 static int net_check_prereq (proto_t protocol) 1497 { 1498 switch (protocol) { 1499 /* Fall through */ 1500 #if (CONFIG_COMMANDS & CFG_CMD_PING) 1501 case PING: 1502 if (NetPingIP == 0) { 1503 puts ("*** ERROR: ping address not given\n"); 1504 return (1); 1505 } 1506 goto common; 1507 #endif 1508 #if (CONFIG_COMMANDS & CFG_CMD_SNTP) 1509 case SNTP: 1510 if (NetNtpServerIP == 0) { 1511 puts ("*** ERROR: NTP server address not given\n"); 1512 return (1); 1513 } 1514 goto common; 1515 #endif 1516 #if (CONFIG_COMMANDS & CFG_CMD_NFS) 1517 case NFS: 1518 #endif 1519 case NETCONS: 1520 case TFTP: 1521 if (NetServerIP == 0) { 1522 puts ("*** ERROR: `serverip' not set\n"); 1523 return (1); 1524 } 1525 #if (CONFIG_COMMANDS & (CFG_CMD_PING | CFG_CMD_SNTP)) 1526 common: 1527 #endif 1528 1529 if (NetOurIP == 0) { 1530 puts ("*** ERROR: `ipaddr' not set\n"); 1531 return (1); 1532 } 1533 /* Fall through */ 1534 1535 case DHCP: 1536 case RARP: 1537 case BOOTP: 1538 case CDP: 1539 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1540 #ifdef CONFIG_NET_MULTI 1541 extern int eth_get_dev_index (void); 1542 int num = eth_get_dev_index (); 1543 1544 switch (num) { 1545 case -1: 1546 puts ("*** ERROR: No ethernet found.\n"); 1547 return (1); 1548 case 0: 1549 puts ("*** ERROR: `ethaddr' not set\n"); 1550 break; 1551 default: 1552 printf ("*** ERROR: `eth%daddr' not set\n", 1553 num); 1554 break; 1555 } 1556 1557 NetStartAgain (); 1558 return (2); 1559 #else 1560 puts ("*** ERROR: `ethaddr' not set\n"); 1561 return (1); 1562 #endif 1563 } 1564 /* Fall through */ 1565 default: 1566 return (0); 1567 } 1568 return (0); /* OK */ 1569 } 1570 /**********************************************************************/ 1571 1572 int 1573 NetCksumOk(uchar * ptr, int len) 1574 { 1575 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1576 } 1577 1578 1579 unsigned 1580 NetCksum(uchar * ptr, int len) 1581 { 1582 ulong xsum; 1583 ushort *p = (ushort *)ptr; 1584 1585 xsum = 0; 1586 while (len-- > 0) 1587 xsum += *p++; 1588 xsum = (xsum & 0xffff) + (xsum >> 16); 1589 xsum = (xsum & 0xffff) + (xsum >> 16); 1590 return (xsum & 0xffff); 1591 } 1592 1593 int 1594 NetEthHdrSize(void) 1595 { 1596 ushort myvlanid; 1597 1598 myvlanid = ntohs(NetOurVLAN); 1599 if (myvlanid == (ushort)-1) 1600 myvlanid = VLAN_NONE; 1601 1602 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1603 } 1604 1605 int 1606 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1607 { 1608 Ethernet_t *et = (Ethernet_t *)xet; 1609 ushort myvlanid; 1610 1611 myvlanid = ntohs(NetOurVLAN); 1612 if (myvlanid == (ushort)-1) 1613 myvlanid = VLAN_NONE; 1614 1615 memcpy (et->et_dest, addr, 6); 1616 memcpy (et->et_src, NetOurEther, 6); 1617 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1618 et->et_protlen = htons(prot); 1619 return ETHER_HDR_SIZE; 1620 } else { 1621 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1622 1623 vet->vet_vlan_type = htons(PROT_VLAN); 1624 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1625 vet->vet_type = htons(prot); 1626 return VLAN_ETHER_HDR_SIZE; 1627 } 1628 } 1629 1630 void 1631 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1632 { 1633 volatile IP_t *ip = (IP_t *)xip; 1634 1635 /* 1636 * If the data is an odd number of bytes, zero the 1637 * byte after the last byte so that the checksum 1638 * will work. 1639 */ 1640 if (len & 1) 1641 xip[IP_HDR_SIZE + len] = 0; 1642 1643 /* 1644 * Construct an IP and UDP header. 1645 * (need to set no fragment bit - XXX) 1646 */ 1647 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1648 ip->ip_tos = 0; 1649 ip->ip_len = htons(IP_HDR_SIZE + len); 1650 ip->ip_id = htons(NetIPID++); 1651 ip->ip_off = htons(0x4000); /* No fragmentation */ 1652 ip->ip_ttl = 255; 1653 ip->ip_p = 17; /* UDP */ 1654 ip->ip_sum = 0; 1655 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1656 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1657 ip->udp_src = htons(sport); 1658 ip->udp_dst = htons(dport); 1659 ip->udp_len = htons(8 + len); 1660 ip->udp_xsum = 0; 1661 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1662 } 1663 1664 void copy_filename (char *dst, char *src, int size) 1665 { 1666 if (*src && (*src == '"')) { 1667 ++src; 1668 --size; 1669 } 1670 1671 while ((--size > 0) && *src && (*src != '"')) { 1672 *dst++ = *src++; 1673 } 1674 *dst = '\0'; 1675 } 1676 1677 #endif /* CFG_CMD_NET */ 1678 1679 void ip_to_string (IPaddr_t x, char *s) 1680 { 1681 x = ntohl (x); 1682 sprintf (s, "%d.%d.%d.%d", 1683 (int) ((x >> 24) & 0xff), 1684 (int) ((x >> 16) & 0xff), 1685 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1686 ); 1687 } 1688 1689 IPaddr_t string_to_ip(char *s) 1690 { 1691 IPaddr_t addr; 1692 char *e; 1693 int i; 1694 1695 if (s == NULL) 1696 return(0); 1697 1698 for (addr=0, i=0; i<4; ++i) { 1699 ulong val = s ? simple_strtoul(s, &e, 10) : 0; 1700 addr <<= 8; 1701 addr |= (val & 0xFF); 1702 if (s) { 1703 s = (*e) ? e+1 : e; 1704 } 1705 } 1706 1707 return (htonl(addr)); 1708 } 1709 1710 void VLAN_to_string(ushort x, char *s) 1711 { 1712 x = ntohs(x); 1713 1714 if (x == (ushort)-1) 1715 x = VLAN_NONE; 1716 1717 if (x == VLAN_NONE) 1718 strcpy(s, "none"); 1719 else 1720 sprintf(s, "%d", x & VLAN_IDMASK); 1721 } 1722 1723 ushort string_to_VLAN(char *s) 1724 { 1725 ushort id; 1726 1727 if (s == NULL) 1728 return htons(VLAN_NONE); 1729 1730 if (*s < '0' || *s > '9') 1731 id = VLAN_NONE; 1732 else 1733 id = (ushort)simple_strtoul(s, NULL, 10); 1734 1735 return htons(id); 1736 } 1737 1738 void print_IPaddr (IPaddr_t x) 1739 { 1740 char tmp[16]; 1741 1742 ip_to_string (x, tmp); 1743 1744 puts (tmp); 1745 } 1746 1747 IPaddr_t getenv_IPaddr (char *var) 1748 { 1749 return (string_to_ip(getenv(var))); 1750 } 1751 1752 ushort getenv_VLAN(char *var) 1753 { 1754 return (string_to_VLAN(getenv(var))); 1755 } 1756