git.sur5r.net Git - u-boot/blob - net/net.c

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