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 #ifdef CONFIG_CMD_RARP 84 #include "rarp.h" 85 #endif 86 #include "nfs.h" 87 #ifdef CONFIG_STATUS_LED 88 #include <status_led.h> 89 #include <miiphy.h> 90 #endif 91 #if defined(CONFIG_CMD_SNTP) 92 #include "sntp.h" 93 #endif 94 #if defined(CONFIG_CDP_VERSION) 95 #include <timestamp.h> 96 #endif 97 #if defined(CONFIG_CMD_DNS) 98 #include "dns.h" 99 #endif 100 101 DECLARE_GLOBAL_DATA_PTR; 102 103 #ifndef CONFIG_ARP_TIMEOUT 104 # define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */ 105 #else 106 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT 107 #endif 108 109 110 #ifndef CONFIG_NET_RETRY_COUNT 111 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 112 #else 113 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT 114 #endif 115 116 /** BOOTP EXTENTIONS **/ 117 118 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ 119 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ 120 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ 121 #if defined(CONFIG_BOOTP_DNS2) 122 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ 123 #endif 124 char NetOurNISDomain[32]={0,}; /* Our NIS domain */ 125 char NetOurHostName[32]={0,}; /* Our hostname */ 126 char NetOurRootPath[64]={0,}; /* Our bootpath */ 127 ushort NetBootFileSize=0; /* Our bootfile size in blocks */ 128 129 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 130 IPaddr_t Mcast_addr; 131 #endif 132 133 /** END OF BOOTP EXTENTIONS **/ 134 135 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ 136 uchar NetOurEther[6]; /* Our ethernet address */ 137 uchar NetServerEther[6] = /* Boot server enet address */ 138 { 0, 0, 0, 0, 0, 0 }; 139 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ 140 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */ 141 volatile uchar *NetRxPacket; /* Current receive packet */ 142 int NetRxPacketLen; /* Current rx packet length */ 143 unsigned NetIPID; /* IP packet ID */ 144 uchar NetBcastAddr[6] = /* Ethernet bcast address */ 145 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 146 uchar NetEtherNullAddr[6] = 147 { 0, 0, 0, 0, 0, 0 }; 148 #ifdef CONFIG_API 149 void (*push_packet)(volatile void *, int len) = 0; 150 #endif 151 #if defined(CONFIG_CMD_CDP) 152 uchar NetCDPAddr[6] = /* Ethernet bcast address */ 153 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc }; 154 #endif 155 int NetState; /* Network loop state */ 156 #ifdef CONFIG_NET_MULTI 157 int NetRestartWrap = 0; /* Tried all network devices */ 158 static int NetRestarted = 0; /* Network loop restarted */ 159 static int NetDevExists = 0; /* At least one device configured */ 160 #endif 161 162 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 163 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */ 164 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */ 165 166 char BootFile[128]; /* Boot File name */ 167 168 #if defined(CONFIG_CMD_PING) 169 IPaddr_t NetPingIP; /* the ip address to ping */ 170 171 static void PingStart(void); 172 #endif 173 174 #if defined(CONFIG_CMD_CDP) 175 static void CDPStart(void); 176 #endif 177 178 #if defined(CONFIG_CMD_SNTP) 179 IPaddr_t NetNtpServerIP; /* NTP server IP address */ 180 int NetTimeOffset=0; /* offset time from UTC */ 181 #endif 182 183 #ifdef CONFIG_NETCONSOLE 184 void NcStart(void); 185 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len); 186 #endif 187 188 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 189 190 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ 191 192 static rxhand_f *packetHandler; /* Current RX packet handler */ 193 static thand_f *timeHandler; /* Current timeout handler */ 194 static ulong timeStart; /* Time base value */ 195 static ulong timeDelta; /* Current timeout value */ 196 volatile uchar *NetTxPacket = 0; /* THE transmit packet */ 197 198 static int net_check_prereq (proto_t protocol); 199 200 static int NetTryCount; 201 202 /**********************************************************************/ 203 204 IPaddr_t NetArpWaitPacketIP; 205 IPaddr_t NetArpWaitReplyIP; 206 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ 207 uchar *NetArpWaitTxPacket; /* THE transmit packet */ 208 int NetArpWaitTxPacketSize; 209 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; 210 ulong NetArpWaitTimerStart; 211 int NetArpWaitTry; 212 213 void ArpRequest (void) 214 { 215 int i; 216 volatile uchar *pkt; 217 ARP_t *arp; 218 219 debug("ARP broadcast %d\n", NetArpWaitTry); 220 221 pkt = NetTxPacket; 222 223 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP); 224 225 arp = (ARP_t *) pkt; 226 227 arp->ar_hrd = htons (ARP_ETHER); 228 arp->ar_pro = htons (PROT_IP); 229 arp->ar_hln = 6; 230 arp->ar_pln = 4; 231 arp->ar_op = htons (ARPOP_REQUEST); 232 233 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ 234 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */ 235 for (i = 10; i < 16; ++i) { 236 arp->ar_data[i] = 0; /* dest ET addr = 0 */ 237 } 238 239 if ((NetArpWaitPacketIP & NetOurSubnetMask) != 240 (NetOurIP & NetOurSubnetMask)) { 241 if (NetOurGatewayIP == 0) { 242 puts ("## Warning: gatewayip needed but not set\n"); 243 NetArpWaitReplyIP = NetArpWaitPacketIP; 244 } else { 245 NetArpWaitReplyIP = NetOurGatewayIP; 246 } 247 } else { 248 NetArpWaitReplyIP = NetArpWaitPacketIP; 249 } 250 251 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP); 252 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); 253 } 254 255 void ArpTimeoutCheck(void) 256 { 257 ulong t; 258 259 if (!NetArpWaitPacketIP) 260 return; 261 262 t = get_timer(0); 263 264 /* check for arp timeout */ 265 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) { 266 NetArpWaitTry++; 267 268 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { 269 puts ("\nARP Retry count exceeded; starting again\n"); 270 NetArpWaitTry = 0; 271 NetStartAgain(); 272 } else { 273 NetArpWaitTimerStart = t; 274 ArpRequest(); 275 } 276 } 277 } 278 279 static void 280 NetInitLoop(proto_t protocol) 281 { 282 static int env_changed_id = 0; 283 bd_t *bd = gd->bd; 284 int env_id = get_env_id (); 285 286 /* update only when the environment has changed */ 287 if (env_changed_id != env_id) { 288 NetCopyIP(&NetOurIP, &bd->bi_ip_addr); 289 NetOurGatewayIP = getenv_IPaddr ("gatewayip"); 290 NetOurSubnetMask= getenv_IPaddr ("netmask"); 291 NetServerIP = getenv_IPaddr ("serverip"); 292 NetOurNativeVLAN = getenv_VLAN("nvlan"); 293 NetOurVLAN = getenv_VLAN("vlan"); 294 #if defined(CONFIG_CMD_DNS) 295 NetOurDNSIP = getenv_IPaddr("dnsip"); 296 #endif 297 env_changed_id = env_id; 298 } 299 300 return; 301 } 302 303 /**********************************************************************/ 304 /* 305 * Main network processing loop. 306 */ 307 308 int 309 NetLoop(proto_t protocol) 310 { 311 bd_t *bd = gd->bd; 312 313 #ifdef CONFIG_NET_MULTI 314 NetRestarted = 0; 315 NetDevExists = 0; 316 #endif 317 318 /* XXX problem with bss workaround */ 319 NetArpWaitPacketMAC = NULL; 320 NetArpWaitTxPacket = NULL; 321 NetArpWaitPacketIP = 0; 322 NetArpWaitReplyIP = 0; 323 NetArpWaitTxPacket = NULL; 324 NetTxPacket = NULL; 325 NetTryCount = 1; 326 327 if (!NetTxPacket) { 328 int i; 329 /* 330 * Setup packet buffers, aligned correctly. 331 */ 332 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 333 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 334 for (i = 0; i < PKTBUFSRX; i++) { 335 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; 336 } 337 } 338 339 if (!NetArpWaitTxPacket) { 340 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); 341 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; 342 NetArpWaitTxPacketSize = 0; 343 } 344 345 eth_halt(); 346 #ifdef CONFIG_NET_MULTI 347 eth_set_current(); 348 #endif 349 if (eth_init(bd) < 0) { 350 eth_halt(); 351 return(-1); 352 } 353 354 restart: 355 #ifdef CONFIG_NET_MULTI 356 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); 357 #else 358 eth_getenv_enetaddr("ethaddr", NetOurEther); 359 #endif 360 361 NetState = NETLOOP_CONTINUE; 362 363 /* 364 * Start the ball rolling with the given start function. From 365 * here on, this code is a state machine driven by received 366 * packets and timer events. 367 */ 368 NetInitLoop(protocol); 369 370 switch (net_check_prereq (protocol)) { 371 case 1: 372 /* network not configured */ 373 eth_halt(); 374 return (-1); 375 376 #ifdef CONFIG_NET_MULTI 377 case 2: 378 /* network device not configured */ 379 break; 380 #endif /* CONFIG_NET_MULTI */ 381 382 case 0: 383 #ifdef CONFIG_NET_MULTI 384 NetDevExists = 1; 385 #endif 386 switch (protocol) { 387 case TFTP: 388 /* always use ARP to get server ethernet address */ 389 TftpStart(); 390 break; 391 392 #if defined(CONFIG_CMD_DHCP) 393 case DHCP: 394 BootpTry = 0; 395 NetOurIP = 0; 396 DhcpRequest(); /* Basically same as BOOTP */ 397 break; 398 #endif 399 400 case BOOTP: 401 BootpTry = 0; 402 NetOurIP = 0; 403 BootpRequest (); 404 break; 405 406 #if defined(CONFIG_CMD_RARP) 407 case RARP: 408 RarpTry = 0; 409 NetOurIP = 0; 410 RarpRequest (); 411 break; 412 #endif 413 #if defined(CONFIG_CMD_PING) 414 case PING: 415 PingStart(); 416 break; 417 #endif 418 #if defined(CONFIG_CMD_NFS) 419 case NFS: 420 NfsStart(); 421 break; 422 #endif 423 #if defined(CONFIG_CMD_CDP) 424 case CDP: 425 CDPStart(); 426 break; 427 #endif 428 #ifdef CONFIG_NETCONSOLE 429 case NETCONS: 430 NcStart(); 431 break; 432 #endif 433 #if defined(CONFIG_CMD_SNTP) 434 case SNTP: 435 SntpStart(); 436 break; 437 #endif 438 #if defined(CONFIG_CMD_DNS) 439 case DNS: 440 DnsStart(); 441 break; 442 #endif 443 default: 444 break; 445 } 446 447 NetBootFileXferSize = 0; 448 break; 449 } 450 451 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 452 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) 453 /* 454 * Echo the inverted link state to the fault LED. 455 */ 456 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { 457 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 458 } else { 459 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 460 } 461 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 462 #endif /* CONFIG_MII, ... */ 463 464 /* 465 * Main packet reception loop. Loop receiving packets until 466 * someone sets `NetState' to a state that terminates. 467 */ 468 for (;;) { 469 WATCHDOG_RESET(); 470 #ifdef CONFIG_SHOW_ACTIVITY 471 { 472 extern void show_activity(int arg); 473 show_activity(1); 474 } 475 #endif 476 /* 477 * Check the ethernet for a new packet. The ethernet 478 * receive routine will process it. 479 */ 480 eth_rx(); 481 482 /* 483 * Abort if ctrl-c was pressed. 484 */ 485 if (ctrlc()) { 486 eth_halt(); 487 puts ("\nAbort\n"); 488 return (-1); 489 } 490 491 ArpTimeoutCheck(); 492 493 /* 494 * Check for a timeout, and run the timeout handler 495 * if we have one. 496 */ 497 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 498 thand_f *x; 499 500 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 501 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 502 defined(CONFIG_STATUS_LED) && \ 503 defined(STATUS_LED_RED) 504 /* 505 * Echo the inverted link state to the fault LED. 506 */ 507 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) { 508 status_led_set (STATUS_LED_RED, STATUS_LED_OFF); 509 } else { 510 status_led_set (STATUS_LED_RED, STATUS_LED_ON); 511 } 512 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 513 #endif /* CONFIG_MII, ... */ 514 x = timeHandler; 515 timeHandler = (thand_f *)0; 516 (*x)(); 517 } 518 519 520 switch (NetState) { 521 522 case NETLOOP_RESTART: 523 #ifdef CONFIG_NET_MULTI 524 NetRestarted = 1; 525 #endif 526 goto restart; 527 528 case NETLOOP_SUCCESS: 529 if (NetBootFileXferSize > 0) { 530 char buf[20]; 531 printf("Bytes transferred = %ld (%lx hex)\n", 532 NetBootFileXferSize, 533 NetBootFileXferSize); 534 sprintf(buf, "%lX", NetBootFileXferSize); 535 setenv("filesize", buf); 536 537 sprintf(buf, "%lX", (unsigned long)load_addr); 538 setenv("fileaddr", buf); 539 } 540 eth_halt(); 541 return NetBootFileXferSize; 542 543 case NETLOOP_FAIL: 544 return (-1); 545 } 546 } 547 } 548 549 /**********************************************************************/ 550 551 static void 552 startAgainTimeout(void) 553 { 554 NetState = NETLOOP_RESTART; 555 } 556 557 static void 558 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) 559 { 560 /* Totally ignore the packet */ 561 } 562 563 void NetStartAgain (void) 564 { 565 char *nretry; 566 int retry_forever = 0; 567 unsigned long retrycnt = 0; 568 569 nretry = getenv("netretry"); 570 if (nretry) { 571 if (!strcmp(nretry, "yes")) 572 retry_forever = 1; 573 else if (!strcmp(nretry, "no")) 574 retrycnt = 0; 575 else if (!strcmp(nretry, "once")) 576 retrycnt = 1; 577 else 578 retrycnt = simple_strtoul(nretry, NULL, 0); 579 } else 580 retry_forever = 1; 581 582 if ((!retry_forever) && (NetTryCount >= retrycnt)) { 583 eth_halt(); 584 NetState = NETLOOP_FAIL; 585 return; 586 } 587 588 NetTryCount++; 589 590 #ifndef CONFIG_NET_MULTI 591 NetSetTimeout (10000UL, startAgainTimeout); 592 NetSetHandler (startAgainHandler); 593 #else /* !CONFIG_NET_MULTI*/ 594 eth_halt (); 595 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 596 eth_try_another (!NetRestarted); 597 #endif 598 eth_init (gd->bd); 599 if (NetRestartWrap) { 600 NetRestartWrap = 0; 601 if (NetDevExists) { 602 NetSetTimeout (10000UL, startAgainTimeout); 603 NetSetHandler (startAgainHandler); 604 } else { 605 NetState = NETLOOP_FAIL; 606 } 607 } else { 608 NetState = NETLOOP_RESTART; 609 } 610 #endif /* CONFIG_NET_MULTI */ 611 } 612 613 /**********************************************************************/ 614 /* 615 * Miscelaneous bits. 616 */ 617 618 void 619 NetSetHandler(rxhand_f * f) 620 { 621 packetHandler = f; 622 } 623 624 625 void 626 NetSetTimeout(ulong iv, thand_f * f) 627 { 628 if (iv == 0) { 629 timeHandler = (thand_f *)0; 630 } else { 631 timeHandler = f; 632 timeStart = get_timer(0); 633 timeDelta = iv; 634 } 635 } 636 637 638 void 639 NetSendPacket(volatile uchar * pkt, int len) 640 { 641 (void) eth_send(pkt, len); 642 } 643 644 int 645 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) 646 { 647 uchar *pkt; 648 649 /* convert to new style broadcast */ 650 if (dest == 0) 651 dest = 0xFFFFFFFF; 652 653 /* if broadcast, make the ether address a broadcast and don't do ARP */ 654 if (dest == 0xFFFFFFFF) 655 ether = NetBcastAddr; 656 657 /* if MAC address was not discovered yet, save the packet and do an ARP request */ 658 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 659 660 debug("sending ARP for %08lx\n", dest); 661 662 NetArpWaitPacketIP = dest; 663 NetArpWaitPacketMAC = ether; 664 665 pkt = NetArpWaitTxPacket; 666 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP); 667 668 NetSetIP (pkt, dest, dport, sport, len); 669 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len); 670 671 /* size of the waiting packet */ 672 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len; 673 674 /* and do the ARP request */ 675 NetArpWaitTry = 1; 676 NetArpWaitTimerStart = get_timer(0); 677 ArpRequest(); 678 return 1; /* waiting */ 679 } 680 681 debug("sending UDP to %08lx/%pM\n", dest, ether); 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 defined(CONFIG_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 debug("sending ARP for %08lx\n", NetPingIP); 706 707 NetArpWaitPacketIP = NetPingIP; 708 NetArpWaitPacketMAC = mac; 709 710 pkt = NetArpWaitTxPacket; 711 pkt += NetSetEther(pkt, mac, PROT_IP); 712 713 ip = (volatile IP_t *)pkt; 714 715 /* 716 * Construct an IP and ICMP header. (need to set no fragment bit - XXX) 717 */ 718 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 719 ip->ip_tos = 0; 720 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); 721 ip->ip_id = htons(NetIPID++); 722 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 723 ip->ip_ttl = 255; 724 ip->ip_p = 0x01; /* ICMP */ 725 ip->ip_sum = 0; 726 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 727 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ 728 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 729 730 s = &ip->udp_src; /* XXX ICMP starts here */ 731 s[0] = htons(0x0800); /* echo-request, code */ 732 s[1] = 0; /* checksum */ 733 s[2] = 0; /* identifier */ 734 s[3] = htons(PingSeqNo++); /* sequence number */ 735 s[1] = ~NetCksum((uchar *)s, 8/2); 736 737 /* size of the waiting packet */ 738 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8; 739 740 /* and do the ARP request */ 741 NetArpWaitTry = 1; 742 NetArpWaitTimerStart = get_timer(0); 743 ArpRequest(); 744 return 1; /* waiting */ 745 } 746 747 static void 748 PingTimeout (void) 749 { 750 eth_halt(); 751 NetState = NETLOOP_FAIL; /* we did not get the reply */ 752 } 753 754 static void 755 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 756 { 757 IPaddr_t tmp; 758 volatile IP_t *ip = (volatile IP_t *)pkt; 759 760 tmp = NetReadIP((void *)&ip->ip_src); 761 if (tmp != NetPingIP) 762 return; 763 764 NetState = NETLOOP_SUCCESS; 765 } 766 767 static void PingStart(void) 768 { 769 #if defined(CONFIG_NET_MULTI) 770 printf ("Using %s device\n", eth_get_name()); 771 #endif /* CONFIG_NET_MULTI */ 772 NetSetTimeout (10000UL, PingTimeout); 773 NetSetHandler (PingHandler); 774 775 PingSend(); 776 } 777 #endif 778 779 #if defined(CONFIG_CMD_CDP) 780 781 #define CDP_DEVICE_ID_TLV 0x0001 782 #define CDP_ADDRESS_TLV 0x0002 783 #define CDP_PORT_ID_TLV 0x0003 784 #define CDP_CAPABILITIES_TLV 0x0004 785 #define CDP_VERSION_TLV 0x0005 786 #define CDP_PLATFORM_TLV 0x0006 787 #define CDP_NATIVE_VLAN_TLV 0x000a 788 #define CDP_APPLIANCE_VLAN_TLV 0x000e 789 #define CDP_TRIGGER_TLV 0x000f 790 #define CDP_POWER_CONSUMPTION_TLV 0x0010 791 #define CDP_SYSNAME_TLV 0x0014 792 #define CDP_SYSOBJECT_TLV 0x0015 793 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016 794 795 #define CDP_TIMEOUT 250UL /* one packet every 250ms */ 796 797 static int CDPSeq; 798 static int CDPOK; 799 800 ushort CDPNativeVLAN; 801 ushort CDPApplianceVLAN; 802 803 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 }; 804 805 static ushort CDP_compute_csum(const uchar *buff, ushort len) 806 { 807 ushort csum; 808 int odd; 809 ulong result = 0; 810 ushort leftover; 811 ushort *p; 812 813 if (len > 0) { 814 odd = 1 & (ulong)buff; 815 if (odd) { 816 result = *buff << 8; 817 len--; 818 buff++; 819 } 820 while (len > 1) { 821 p = (ushort *)buff; 822 result += *p++; 823 buff = (uchar *)p; 824 if (result & 0x80000000) 825 result = (result & 0xFFFF) + (result >> 16); 826 len -= 2; 827 } 828 if (len) { 829 leftover = (signed short)(*(const signed char *)buff); 830 /* CISCO SUCKS big time! (and blows too): 831 * CDP uses the IP checksum algorithm with a twist; 832 * for the last byte it *sign* extends and sums. 833 */ 834 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff); 835 } 836 while (result >> 16) 837 result = (result & 0xFFFF) + (result >> 16); 838 839 if (odd) 840 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); 841 } 842 843 /* add up 16-bit and 17-bit words for 17+c bits */ 844 result = (result & 0xffff) + (result >> 16); 845 /* add up 16-bit and 2-bit for 16+c bit */ 846 result = (result & 0xffff) + (result >> 16); 847 /* add up carry.. */ 848 result = (result & 0xffff) + (result >> 16); 849 850 /* negate */ 851 csum = ~(ushort)result; 852 853 /* run time endian detection */ 854 if (csum != htons(csum)) /* little endian */ 855 csum = htons(csum); 856 857 return csum; 858 } 859 860 int CDPSendTrigger(void) 861 { 862 volatile uchar *pkt; 863 volatile ushort *s; 864 volatile ushort *cp; 865 Ethernet_t *et; 866 int len; 867 ushort chksum; 868 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \ 869 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM) 870 char buf[32]; 871 #endif 872 873 pkt = NetTxPacket; 874 et = (Ethernet_t *)pkt; 875 876 /* NOTE: trigger sent not on any VLAN */ 877 878 /* form ethernet header */ 879 memcpy(et->et_dest, NetCDPAddr, 6); 880 memcpy(et->et_src, NetOurEther, 6); 881 882 pkt += ETHER_HDR_SIZE; 883 884 /* SNAP header */ 885 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)); 886 pkt += sizeof(CDP_SNAP_hdr); 887 888 /* CDP header */ 889 *pkt++ = 0x02; /* CDP version 2 */ 890 *pkt++ = 180; /* TTL */ 891 s = (volatile ushort *)pkt; 892 cp = s; 893 *s++ = htons(0); /* checksum (0 for later calculation) */ 894 895 /* CDP fields */ 896 #ifdef CONFIG_CDP_DEVICE_ID 897 *s++ = htons(CDP_DEVICE_ID_TLV); 898 *s++ = htons(CONFIG_CDP_DEVICE_ID); 899 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther); 900 memcpy((uchar *)s, buf, 16); 901 s += 16 / 2; 902 #endif 903 904 #ifdef CONFIG_CDP_PORT_ID 905 *s++ = htons(CDP_PORT_ID_TLV); 906 memset(buf, 0, sizeof(buf)); 907 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index()); 908 len = strlen(buf); 909 if (len & 1) /* make it even */ 910 len++; 911 *s++ = htons(len + 4); 912 memcpy((uchar *)s, buf, len); 913 s += len / 2; 914 #endif 915 916 #ifdef CONFIG_CDP_CAPABILITIES 917 *s++ = htons(CDP_CAPABILITIES_TLV); 918 *s++ = htons(8); 919 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES); 920 s += 2; 921 #endif 922 923 #ifdef CONFIG_CDP_VERSION 924 *s++ = htons(CDP_VERSION_TLV); 925 memset(buf, 0, sizeof(buf)); 926 strcpy(buf, CONFIG_CDP_VERSION); 927 len = strlen(buf); 928 if (len & 1) /* make it even */ 929 len++; 930 *s++ = htons(len + 4); 931 memcpy((uchar *)s, buf, len); 932 s += len / 2; 933 #endif 934 935 #ifdef CONFIG_CDP_PLATFORM 936 *s++ = htons(CDP_PLATFORM_TLV); 937 memset(buf, 0, sizeof(buf)); 938 strcpy(buf, CONFIG_CDP_PLATFORM); 939 len = strlen(buf); 940 if (len & 1) /* make it even */ 941 len++; 942 *s++ = htons(len + 4); 943 memcpy((uchar *)s, buf, len); 944 s += len / 2; 945 #endif 946 947 #ifdef CONFIG_CDP_TRIGGER 948 *s++ = htons(CDP_TRIGGER_TLV); 949 *s++ = htons(8); 950 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER); 951 s += 2; 952 #endif 953 954 #ifdef CONFIG_CDP_POWER_CONSUMPTION 955 *s++ = htons(CDP_POWER_CONSUMPTION_TLV); 956 *s++ = htons(6); 957 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION); 958 #endif 959 960 /* length of ethernet packet */ 961 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE); 962 et->et_protlen = htons(len); 963 964 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr); 965 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len)); 966 if (chksum == 0) 967 chksum = 0xFFFF; 968 *cp = htons(chksum); 969 970 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket); 971 return 0; 972 } 973 974 static void 975 CDPTimeout (void) 976 { 977 CDPSeq++; 978 979 if (CDPSeq < 3) { 980 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 981 CDPSendTrigger(); 982 return; 983 } 984 985 /* if not OK try again */ 986 if (!CDPOK) 987 NetStartAgain(); 988 else 989 NetState = NETLOOP_SUCCESS; 990 } 991 992 static void 993 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) 994 { 995 /* nothing */ 996 } 997 998 static void 999 CDPHandler(const uchar * pkt, unsigned len) 1000 { 1001 const uchar *t; 1002 const ushort *ss; 1003 ushort type, tlen; 1004 uchar applid; 1005 ushort vlan, nvlan; 1006 1007 /* minimum size? */ 1008 if (len < sizeof(CDP_SNAP_hdr) + 4) 1009 goto pkt_short; 1010 1011 /* check for valid CDP SNAP header */ 1012 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0) 1013 return; 1014 1015 pkt += sizeof(CDP_SNAP_hdr); 1016 len -= sizeof(CDP_SNAP_hdr); 1017 1018 /* Version of CDP protocol must be >= 2 and TTL != 0 */ 1019 if (pkt[0] < 0x02 || pkt[1] == 0) 1020 return; 1021 1022 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */ 1023 if (pkt[0] != 0x02) 1024 printf("** WARNING: CDP packet received with a protocol version %d > 2\n", 1025 pkt[0] & 0xff); 1026 1027 if (CDP_compute_csum(pkt, len) != 0) 1028 return; 1029 1030 pkt += 4; 1031 len -= 4; 1032 1033 vlan = htons(-1); 1034 nvlan = htons(-1); 1035 while (len > 0) { 1036 if (len < 4) 1037 goto pkt_short; 1038 1039 ss = (const ushort *)pkt; 1040 type = ntohs(ss[0]); 1041 tlen = ntohs(ss[1]); 1042 if (tlen > len) { 1043 goto pkt_short; 1044 } 1045 1046 pkt += tlen; 1047 len -= tlen; 1048 1049 ss += 2; /* point ss to the data of the TLV */ 1050 tlen -= 4; 1051 1052 switch (type) { 1053 case CDP_DEVICE_ID_TLV: 1054 break; 1055 case CDP_ADDRESS_TLV: 1056 break; 1057 case CDP_PORT_ID_TLV: 1058 break; 1059 case CDP_CAPABILITIES_TLV: 1060 break; 1061 case CDP_VERSION_TLV: 1062 break; 1063 case CDP_PLATFORM_TLV: 1064 break; 1065 case CDP_NATIVE_VLAN_TLV: 1066 nvlan = *ss; 1067 break; 1068 case CDP_APPLIANCE_VLAN_TLV: 1069 t = (const uchar *)ss; 1070 while (tlen > 0) { 1071 if (tlen < 3) 1072 goto pkt_short; 1073 1074 applid = t[0]; 1075 ss = (const ushort *)(t + 1); 1076 1077 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE 1078 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE) 1079 vlan = *ss; 1080 #else 1081 vlan = ntohs(*ss); /* XXX will this work; dunno */ 1082 #endif 1083 t += 3; tlen -= 3; 1084 } 1085 break; 1086 case CDP_TRIGGER_TLV: 1087 break; 1088 case CDP_POWER_CONSUMPTION_TLV: 1089 break; 1090 case CDP_SYSNAME_TLV: 1091 break; 1092 case CDP_SYSOBJECT_TLV: 1093 break; 1094 case CDP_MANAGEMENT_ADDRESS_TLV: 1095 break; 1096 } 1097 } 1098 1099 CDPApplianceVLAN = vlan; 1100 CDPNativeVLAN = nvlan; 1101 1102 CDPOK = 1; 1103 return; 1104 1105 pkt_short: 1106 printf("** CDP packet is too short\n"); 1107 return; 1108 } 1109 1110 static void CDPStart(void) 1111 { 1112 #if defined(CONFIG_NET_MULTI) 1113 printf ("Using %s device\n", eth_get_name()); 1114 #endif 1115 CDPSeq = 0; 1116 CDPOK = 0; 1117 1118 CDPNativeVLAN = htons(-1); 1119 CDPApplianceVLAN = htons(-1); 1120 1121 NetSetTimeout (CDP_TIMEOUT, CDPTimeout); 1122 NetSetHandler (CDPDummyHandler); 1123 1124 CDPSendTrigger(); 1125 } 1126 #endif 1127 1128 #ifdef CONFIG_IP_DEFRAG 1129 /* 1130 * This function collects fragments in a single packet, according 1131 * to the algorithm in RFC815. It returns NULL or the pointer to 1132 * a complete packet, in static storage 1133 */ 1134 #ifndef CONFIG_NET_MAXDEFRAG 1135 #define CONFIG_NET_MAXDEFRAG 16384 1136 #endif 1137 /* 1138 * MAXDEFRAG, above, is chosen in the config file and is real data 1139 * so we need to add the NFS overhead, which is more than TFTP. 1140 * To use sizeof in the internal unnamed structures, we need a real 1141 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately). 1142 * The compiler doesn't complain nor allocates the actual structure 1143 */ 1144 static struct rpc_t rpc_specimen; 1145 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply)) 1146 1147 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP) 1148 1149 /* 1150 * this is the packet being assembled, either data or frag control. 1151 * Fragments go by 8 bytes, so this union must be 8 bytes long 1152 */ 1153 struct hole { 1154 /* first_byte is address of this structure */ 1155 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */ 1156 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */ 1157 u16 prev_hole; /* index of prev, 0 == none */ 1158 u16 unused; 1159 }; 1160 1161 static IP_t *__NetDefragment(IP_t *ip, int *lenp) 1162 { 1163 static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN))); 1164 static u16 first_hole, total_len; 1165 struct hole *payload, *thisfrag, *h, *newh; 1166 IP_t *localip = (IP_t *)pkt_buff; 1167 uchar *indata = (uchar *)ip; 1168 int offset8, start, len, done = 0; 1169 u16 ip_off = ntohs(ip->ip_off); 1170 1171 /* payload starts after IP header, this fragment is in there */ 1172 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP); 1173 offset8 = (ip_off & IP_OFFS); 1174 thisfrag = payload + offset8; 1175 start = offset8 * 8; 1176 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP; 1177 1178 if (start + len > IP_MAXUDP) /* fragment extends too far */ 1179 return NULL; 1180 1181 if (!total_len || localip->ip_id != ip->ip_id) { 1182 /* new (or different) packet, reset structs */ 1183 total_len = 0xffff; 1184 payload[0].last_byte = ~0; 1185 payload[0].next_hole = 0; 1186 payload[0].prev_hole = 0; 1187 first_hole = 0; 1188 /* any IP header will work, copy the first we received */ 1189 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP); 1190 } 1191 1192 /* 1193 * What follows is the reassembly algorithm. We use the payload 1194 * array as a linked list of hole descriptors, as each hole starts 1195 * at a multiple of 8 bytes. However, last byte can be whatever value, 1196 * so it is represented as byte count, not as 8-byte blocks. 1197 */ 1198 1199 h = payload + first_hole; 1200 while (h->last_byte < start) { 1201 if (!h->next_hole) { 1202 /* no hole that far away */ 1203 return NULL; 1204 } 1205 h = payload + h->next_hole; 1206 } 1207 1208 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */ 1209 if (offset8 + ((len + 7) / 8) <= h - payload) { 1210 /* no overlap with holes (dup fragment?) */ 1211 return NULL; 1212 } 1213 1214 if (!(ip_off & IP_FLAGS_MFRAG)) { 1215 /* no more fragmentss: truncate this (last) hole */ 1216 total_len = start + len; 1217 h->last_byte = start + len; 1218 } 1219 1220 /* 1221 * There is some overlap: fix the hole list. This code doesn't 1222 * deal with a fragment that overlaps with two different holes 1223 * (thus being a superset of a previously-received fragment). 1224 */ 1225 1226 if ( (h >= thisfrag) && (h->last_byte <= start + len) ) { 1227 /* complete overlap with hole: remove hole */ 1228 if (!h->prev_hole && !h->next_hole) { 1229 /* last remaining hole */ 1230 done = 1; 1231 } else if (!h->prev_hole) { 1232 /* first hole */ 1233 first_hole = h->next_hole; 1234 payload[h->next_hole].prev_hole = 0; 1235 } else if (!h->next_hole) { 1236 /* last hole */ 1237 payload[h->prev_hole].next_hole = 0; 1238 } else { 1239 /* in the middle of the list */ 1240 payload[h->next_hole].prev_hole = h->prev_hole; 1241 payload[h->prev_hole].next_hole = h->next_hole; 1242 } 1243 1244 } else if (h->last_byte <= start + len) { 1245 /* overlaps with final part of the hole: shorten this hole */ 1246 h->last_byte = start; 1247 1248 } else if (h >= thisfrag) { 1249 /* overlaps with initial part of the hole: move this hole */ 1250 newh = thisfrag + (len / 8); 1251 *newh = *h; 1252 h = newh; 1253 if (h->next_hole) 1254 payload[h->next_hole].prev_hole = (h - payload); 1255 if (h->prev_hole) 1256 payload[h->prev_hole].next_hole = (h - payload); 1257 else 1258 first_hole = (h - payload); 1259 1260 } else { 1261 /* fragment sits in the middle: split the hole */ 1262 newh = thisfrag + (len / 8); 1263 *newh = *h; 1264 h->last_byte = start; 1265 h->next_hole = (newh - payload); 1266 newh->prev_hole = (h - payload); 1267 if (newh->next_hole) 1268 payload[newh->next_hole].prev_hole = (newh - payload); 1269 } 1270 1271 /* finally copy this fragment and possibly return whole packet */ 1272 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len); 1273 if (!done) 1274 return NULL; 1275 1276 localip->ip_len = htons(total_len); 1277 *lenp = total_len + IP_HDR_SIZE_NO_UDP; 1278 return localip; 1279 } 1280 1281 static inline IP_t *NetDefragment(IP_t *ip, int *lenp) 1282 { 1283 u16 ip_off = ntohs(ip->ip_off); 1284 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 1285 return ip; /* not a fragment */ 1286 return __NetDefragment(ip, lenp); 1287 } 1288 1289 #else /* !CONFIG_IP_DEFRAG */ 1290 1291 static inline IP_t *NetDefragment(IP_t *ip, int *lenp) 1292 { 1293 u16 ip_off = ntohs(ip->ip_off); 1294 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 1295 return ip; /* not a fragment */ 1296 return NULL; 1297 } 1298 #endif 1299 1300 void 1301 NetReceive(volatile uchar * inpkt, int len) 1302 { 1303 Ethernet_t *et; 1304 IP_t *ip; 1305 ARP_t *arp; 1306 IPaddr_t tmp; 1307 int x; 1308 uchar *pkt; 1309 #if defined(CONFIG_CMD_CDP) 1310 int iscdp; 1311 #endif 1312 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1313 1314 debug("packet received\n"); 1315 1316 NetRxPacket = inpkt; 1317 NetRxPacketLen = len; 1318 et = (Ethernet_t *)inpkt; 1319 1320 /* too small packet? */ 1321 if (len < ETHER_HDR_SIZE) 1322 return; 1323 1324 #ifdef CONFIG_API 1325 if (push_packet) { 1326 (*push_packet)(inpkt, len); 1327 return; 1328 } 1329 #endif 1330 1331 #if defined(CONFIG_CMD_CDP) 1332 /* keep track if packet is CDP */ 1333 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0; 1334 #endif 1335 1336 myvlanid = ntohs(NetOurVLAN); 1337 if (myvlanid == (ushort)-1) 1338 myvlanid = VLAN_NONE; 1339 mynvlanid = ntohs(NetOurNativeVLAN); 1340 if (mynvlanid == (ushort)-1) 1341 mynvlanid = VLAN_NONE; 1342 1343 x = ntohs(et->et_protlen); 1344 1345 debug("packet received\n"); 1346 1347 if (x < 1514) { 1348 /* 1349 * Got a 802 packet. Check the other protocol field. 1350 */ 1351 x = ntohs(et->et_prot); 1352 1353 ip = (IP_t *)(inpkt + E802_HDR_SIZE); 1354 len -= E802_HDR_SIZE; 1355 1356 } else if (x != PROT_VLAN) { /* normal packet */ 1357 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE); 1358 len -= ETHER_HDR_SIZE; 1359 1360 } else { /* VLAN packet */ 1361 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et; 1362 1363 debug("VLAN packet received\n"); 1364 1365 /* too small packet? */ 1366 if (len < VLAN_ETHER_HDR_SIZE) 1367 return; 1368 1369 /* if no VLAN active */ 1370 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1371 #if defined(CONFIG_CMD_CDP) 1372 && iscdp == 0 1373 #endif 1374 ) 1375 return; 1376 1377 cti = ntohs(vet->vet_tag); 1378 vlanid = cti & VLAN_IDMASK; 1379 x = ntohs(vet->vet_type); 1380 1381 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE); 1382 len -= VLAN_ETHER_HDR_SIZE; 1383 } 1384 1385 debug("Receive from protocol 0x%x\n", x); 1386 1387 #if defined(CONFIG_CMD_CDP) 1388 if (iscdp) { 1389 CDPHandler((uchar *)ip, len); 1390 return; 1391 } 1392 #endif 1393 1394 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1395 if (vlanid == VLAN_NONE) 1396 vlanid = (mynvlanid & VLAN_IDMASK); 1397 /* not matched? */ 1398 if (vlanid != (myvlanid & VLAN_IDMASK)) 1399 return; 1400 } 1401 1402 switch (x) { 1403 1404 case PROT_ARP: 1405 /* 1406 * We have to deal with two types of ARP packets: 1407 * - REQUEST packets will be answered by sending our 1408 * IP address - if we know it. 1409 * - REPLY packates are expected only after we asked 1410 * for the TFTP server's or the gateway's ethernet 1411 * address; so if we receive such a packet, we set 1412 * the server ethernet address 1413 */ 1414 debug("Got ARP\n"); 1415 1416 arp = (ARP_t *)ip; 1417 if (len < ARP_HDR_SIZE) { 1418 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1419 return; 1420 } 1421 if (ntohs(arp->ar_hrd) != ARP_ETHER) { 1422 return; 1423 } 1424 if (ntohs(arp->ar_pro) != PROT_IP) { 1425 return; 1426 } 1427 if (arp->ar_hln != 6) { 1428 return; 1429 } 1430 if (arp->ar_pln != 4) { 1431 return; 1432 } 1433 1434 if (NetOurIP == 0) { 1435 return; 1436 } 1437 1438 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { 1439 return; 1440 } 1441 1442 switch (ntohs(arp->ar_op)) { 1443 case ARPOP_REQUEST: /* reply with our IP address */ 1444 debug("Got ARP REQUEST, return our IP\n"); 1445 pkt = (uchar *)et; 1446 pkt += NetSetEther(pkt, et->et_src, PROT_ARP); 1447 arp->ar_op = htons(ARPOP_REPLY); 1448 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); 1449 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); 1450 memcpy (&arp->ar_data[ 0], NetOurEther, 6); 1451 NetCopyIP(&arp->ar_data[ 6], &NetOurIP); 1452 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE); 1453 return; 1454 1455 case ARPOP_REPLY: /* arp reply */ 1456 /* are we waiting for a reply */ 1457 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) 1458 break; 1459 1460 #ifdef CONFIG_KEEP_SERVERADDR 1461 if (NetServerIP == NetArpWaitPacketIP) { 1462 char buf[20]; 1463 sprintf(buf, "%pM", arp->ar_data); 1464 setenv("serveraddr", buf); 1465 } 1466 #endif 1467 1468 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n", 1469 arp->ar_data); 1470 1471 tmp = NetReadIP(&arp->ar_data[6]); 1472 1473 /* matched waiting packet's address */ 1474 if (tmp == NetArpWaitReplyIP) { 1475 debug("Got it\n"); 1476 /* save address for later use */ 1477 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); 1478 1479 #ifdef CONFIG_NETCONSOLE 1480 (*packetHandler)(0,0,0,0); 1481 #endif 1482 /* modify header, and transmit it */ 1483 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); 1484 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); 1485 1486 /* no arp request pending now */ 1487 NetArpWaitPacketIP = 0; 1488 NetArpWaitTxPacketSize = 0; 1489 NetArpWaitPacketMAC = NULL; 1490 1491 } 1492 return; 1493 default: 1494 debug("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); 1495 return; 1496 } 1497 break; 1498 1499 #ifdef CONFIG_CMD_RARP 1500 case PROT_RARP: 1501 debug("Got RARP\n"); 1502 arp = (ARP_t *)ip; 1503 if (len < ARP_HDR_SIZE) { 1504 printf("bad length %d < %d\n", len, ARP_HDR_SIZE); 1505 return; 1506 } 1507 1508 if ((ntohs(arp->ar_op) != RARPOP_REPLY) || 1509 (ntohs(arp->ar_hrd) != ARP_ETHER) || 1510 (ntohs(arp->ar_pro) != PROT_IP) || 1511 (arp->ar_hln != 6) || (arp->ar_pln != 4)) { 1512 1513 puts ("invalid RARP header\n"); 1514 } else { 1515 NetCopyIP(&NetOurIP, &arp->ar_data[16]); 1516 if (NetServerIP == 0) 1517 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); 1518 memcpy (NetServerEther, &arp->ar_data[ 0], 6); 1519 1520 (*packetHandler)(0,0,0,0); 1521 } 1522 break; 1523 #endif 1524 case PROT_IP: 1525 debug("Got IP\n"); 1526 /* Before we start poking the header, make sure it is there */ 1527 if (len < IP_HDR_SIZE) { 1528 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE); 1529 return; 1530 } 1531 /* Check the packet length */ 1532 if (len < ntohs(ip->ip_len)) { 1533 printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1534 return; 1535 } 1536 len = ntohs(ip->ip_len); 1537 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); 1538 1539 /* Can't deal with anything except IPv4 */ 1540 if ((ip->ip_hl_v & 0xf0) != 0x40) { 1541 return; 1542 } 1543 /* Can't deal with IP options (headers != 20 bytes) */ 1544 if ((ip->ip_hl_v & 0x0f) > 0x05) { 1545 return; 1546 } 1547 /* Check the Checksum of the header */ 1548 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { 1549 puts ("checksum bad\n"); 1550 return; 1551 } 1552 /* If it is not for us, ignore it */ 1553 tmp = NetReadIP(&ip->ip_dst); 1554 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { 1555 #ifdef CONFIG_MCAST_TFTP 1556 if (Mcast_addr != tmp) 1557 #endif 1558 return; 1559 } 1560 /* 1561 * The function returns the unchanged packet if it's not 1562 * a fragment, and either the complete packet or NULL if 1563 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL) 1564 */ 1565 if (!(ip = NetDefragment(ip, &len))) 1566 return; 1567 /* 1568 * watch for ICMP host redirects 1569 * 1570 * There is no real handler code (yet). We just watch 1571 * for ICMP host redirect messages. In case anybody 1572 * sees these messages: please contact me 1573 * (wd@denx.de), or - even better - send me the 1574 * necessary fixes :-) 1575 * 1576 * Note: in all cases where I have seen this so far 1577 * it was a problem with the router configuration, 1578 * for instance when a router was configured in the 1579 * BOOTP reply, but the TFTP server was on the same 1580 * subnet. So this is probably a warning that your 1581 * configuration might be wrong. But I'm not really 1582 * sure if there aren't any other situations. 1583 */ 1584 if (ip->ip_p == IPPROTO_ICMP) { 1585 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); 1586 1587 switch (icmph->type) { 1588 case ICMP_REDIRECT: 1589 if (icmph->code != ICMP_REDIR_HOST) 1590 return; 1591 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway); 1592 return; 1593 #if defined(CONFIG_CMD_PING) 1594 case ICMP_ECHO_REPLY: 1595 /* 1596 * IP header OK. Pass the packet to the current handler. 1597 */ 1598 /* XXX point to ip packet */ 1599 (*packetHandler)((uchar *)ip, 0, 0, 0); 1600 return; 1601 case ICMP_ECHO_REQUEST: 1602 debug("Got ICMP ECHO REQUEST, return %d bytes \n", 1603 ETHER_HDR_SIZE + len); 1604 1605 memcpy (&et->et_dest[0], &et->et_src[0], 6); 1606 memcpy (&et->et_src[ 0], NetOurEther, 6); 1607 1608 ip->ip_sum = 0; 1609 ip->ip_off = 0; 1610 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src); 1611 NetCopyIP((void*)&ip->ip_src, &NetOurIP); 1612 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1); 1613 1614 icmph->type = ICMP_ECHO_REPLY; 1615 icmph->checksum = 0; 1616 icmph->checksum = ~NetCksum((uchar *)icmph, 1617 (len - IP_HDR_SIZE_NO_UDP) >> 1); 1618 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len); 1619 return; 1620 #endif 1621 default: 1622 return; 1623 } 1624 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1625 return; 1626 } 1627 1628 #ifdef CONFIG_UDP_CHECKSUM 1629 if (ip->udp_xsum != 0) { 1630 ulong xsum; 1631 ushort *sumptr; 1632 ushort sumlen; 1633 1634 xsum = ip->ip_p; 1635 xsum += (ntohs(ip->udp_len)); 1636 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1637 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1638 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1639 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1640 1641 sumlen = ntohs(ip->udp_len); 1642 sumptr = (ushort *) &(ip->udp_src); 1643 1644 while (sumlen > 1) { 1645 ushort sumdata; 1646 1647 sumdata = *sumptr++; 1648 xsum += ntohs(sumdata); 1649 sumlen -= 2; 1650 } 1651 if (sumlen > 0) { 1652 ushort sumdata; 1653 1654 sumdata = *(unsigned char *) sumptr; 1655 sumdata = (sumdata << 8) & 0xff00; 1656 xsum += sumdata; 1657 } 1658 while ((xsum >> 16) != 0) { 1659 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); 1660 } 1661 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1662 printf(" UDP wrong checksum %08lx %08x\n", 1663 xsum, ntohs(ip->udp_xsum)); 1664 return; 1665 } 1666 } 1667 #endif 1668 1669 1670 #ifdef CONFIG_NETCONSOLE 1671 nc_input_packet((uchar *)ip +IP_HDR_SIZE, 1672 ntohs(ip->udp_dst), 1673 ntohs(ip->udp_src), 1674 ntohs(ip->udp_len) - 8); 1675 #endif 1676 /* 1677 * IP header OK. Pass the packet to the current handler. 1678 */ 1679 (*packetHandler)((uchar *)ip +IP_HDR_SIZE, 1680 ntohs(ip->udp_dst), 1681 ntohs(ip->udp_src), 1682 ntohs(ip->udp_len) - 8); 1683 break; 1684 } 1685 } 1686 1687 1688 /**********************************************************************/ 1689 1690 static int net_check_prereq (proto_t protocol) 1691 { 1692 switch (protocol) { 1693 /* Fall through */ 1694 #if defined(CONFIG_CMD_PING) 1695 case PING: 1696 if (NetPingIP == 0) { 1697 puts ("*** ERROR: ping address not given\n"); 1698 return (1); 1699 } 1700 goto common; 1701 #endif 1702 #if defined(CONFIG_CMD_SNTP) 1703 case SNTP: 1704 if (NetNtpServerIP == 0) { 1705 puts ("*** ERROR: NTP server address not given\n"); 1706 return (1); 1707 } 1708 goto common; 1709 #endif 1710 #if defined(CONFIG_CMD_DNS) 1711 case DNS: 1712 if (NetOurDNSIP == 0) { 1713 puts("*** ERROR: DNS server address not given\n"); 1714 return 1; 1715 } 1716 goto common; 1717 #endif 1718 #if defined(CONFIG_CMD_NFS) 1719 case NFS: 1720 #endif 1721 case NETCONS: 1722 case TFTP: 1723 if (NetServerIP == 0) { 1724 puts ("*** ERROR: `serverip' not set\n"); 1725 return (1); 1726 } 1727 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) 1728 common: 1729 #endif 1730 1731 if (NetOurIP == 0) { 1732 puts ("*** ERROR: `ipaddr' not set\n"); 1733 return (1); 1734 } 1735 /* Fall through */ 1736 1737 #ifdef CONFIG_CMD_RARP 1738 case RARP: 1739 #endif 1740 case BOOTP: 1741 case CDP: 1742 case DHCP: 1743 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1744 #ifdef CONFIG_NET_MULTI 1745 extern int eth_get_dev_index (void); 1746 int num = eth_get_dev_index (); 1747 1748 switch (num) { 1749 case -1: 1750 puts ("*** ERROR: No ethernet found.\n"); 1751 return (1); 1752 case 0: 1753 puts ("*** ERROR: `ethaddr' not set\n"); 1754 break; 1755 default: 1756 printf ("*** ERROR: `eth%daddr' not set\n", 1757 num); 1758 break; 1759 } 1760 1761 NetStartAgain (); 1762 return (2); 1763 #else 1764 puts ("*** ERROR: `ethaddr' not set\n"); 1765 return (1); 1766 #endif 1767 } 1768 /* Fall through */ 1769 default: 1770 return (0); 1771 } 1772 return (0); /* OK */ 1773 } 1774 /**********************************************************************/ 1775 1776 int 1777 NetCksumOk(uchar * ptr, int len) 1778 { 1779 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1780 } 1781 1782 1783 unsigned 1784 NetCksum(uchar * ptr, int len) 1785 { 1786 ulong xsum; 1787 ushort *p = (ushort *)ptr; 1788 1789 xsum = 0; 1790 while (len-- > 0) 1791 xsum += *p++; 1792 xsum = (xsum & 0xffff) + (xsum >> 16); 1793 xsum = (xsum & 0xffff) + (xsum >> 16); 1794 return (xsum & 0xffff); 1795 } 1796 1797 int 1798 NetEthHdrSize(void) 1799 { 1800 ushort myvlanid; 1801 1802 myvlanid = ntohs(NetOurVLAN); 1803 if (myvlanid == (ushort)-1) 1804 myvlanid = VLAN_NONE; 1805 1806 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE; 1807 } 1808 1809 int 1810 NetSetEther(volatile uchar * xet, uchar * addr, uint prot) 1811 { 1812 Ethernet_t *et = (Ethernet_t *)xet; 1813 ushort myvlanid; 1814 1815 myvlanid = ntohs(NetOurVLAN); 1816 if (myvlanid == (ushort)-1) 1817 myvlanid = VLAN_NONE; 1818 1819 memcpy (et->et_dest, addr, 6); 1820 memcpy (et->et_src, NetOurEther, 6); 1821 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1822 et->et_protlen = htons(prot); 1823 return ETHER_HDR_SIZE; 1824 } else { 1825 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet; 1826 1827 vet->vet_vlan_type = htons(PROT_VLAN); 1828 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1829 vet->vet_type = htons(prot); 1830 return VLAN_ETHER_HDR_SIZE; 1831 } 1832 } 1833 1834 void 1835 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) 1836 { 1837 IP_t *ip = (IP_t *)xip; 1838 1839 /* 1840 * If the data is an odd number of bytes, zero the 1841 * byte after the last byte so that the checksum 1842 * will work. 1843 */ 1844 if (len & 1) 1845 xip[IP_HDR_SIZE + len] = 0; 1846 1847 /* 1848 * Construct an IP and UDP header. 1849 * (need to set no fragment bit - XXX) 1850 */ 1851 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ 1852 ip->ip_tos = 0; 1853 ip->ip_len = htons(IP_HDR_SIZE + len); 1854 ip->ip_id = htons(NetIPID++); 1855 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1856 ip->ip_ttl = 255; 1857 ip->ip_p = 17; /* UDP */ 1858 ip->ip_sum = 0; 1859 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ 1860 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ 1861 ip->udp_src = htons(sport); 1862 ip->udp_dst = htons(dport); 1863 ip->udp_len = htons(8 + len); 1864 ip->udp_xsum = 0; 1865 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); 1866 } 1867 1868 void copy_filename (char *dst, const char *src, int size) 1869 { 1870 if (*src && (*src == '"')) { 1871 ++src; 1872 --size; 1873 } 1874 1875 while ((--size > 0) && *src && (*src != '"')) { 1876 *dst++ = *src++; 1877 } 1878 *dst = '\0'; 1879 } 1880 1881 #if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS) 1882 /* 1883 * make port a little random (1024-17407) 1884 * This keeps the math somewhat trivial to compute, and seems to work with 1885 * all supported protocols/clients/servers 1886 */ 1887 unsigned int random_port(void) 1888 { 1889 return 1024 + (get_timer(0) % 0x4000); 1890 } 1891 #endif 1892 1893 void ip_to_string (IPaddr_t x, char *s) 1894 { 1895 x = ntohl (x); 1896 sprintf (s, "%d.%d.%d.%d", 1897 (int) ((x >> 24) & 0xff), 1898 (int) ((x >> 16) & 0xff), 1899 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1900 ); 1901 } 1902 1903 void VLAN_to_string(ushort x, char *s) 1904 { 1905 x = ntohs(x); 1906 1907 if (x == (ushort)-1) 1908 x = VLAN_NONE; 1909 1910 if (x == VLAN_NONE) 1911 strcpy(s, "none"); 1912 else 1913 sprintf(s, "%d", x & VLAN_IDMASK); 1914 } 1915 1916 ushort string_to_VLAN(const char *s) 1917 { 1918 ushort id; 1919 1920 if (s == NULL) 1921 return htons(VLAN_NONE); 1922 1923 if (*s < '0' || *s > '9') 1924 id = VLAN_NONE; 1925 else 1926 id = (ushort)simple_strtoul(s, NULL, 10); 1927 1928 return htons(id); 1929 } 1930 1931 ushort getenv_VLAN(char *var) 1932 { 1933 return (string_to_VLAN(getenv(var))); 1934 } 1935