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 defined(CONFIG_CMD_SNTP)
  90 #include "sntp.h"
  91 #endif
  92 #if defined(CONFIG_CDP_VERSION)
  93 #include <timestamp.h>
  94 #endif
  95 #if defined(CONFIG_CMD_DNS)
  96 #include "dns.h"
  97 #endif
  98
  99 #if defined(CONFIG_CMD_NET)
 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                 case RARP:
 407                         RarpTry = 0;
 408                         NetOurIP = 0;
 409                         RarpRequest ();
 410                         break;
 411 #if defined(CONFIG_CMD_PING)
 412                 case PING:
 413                         PingStart();
 414                         break;
 415 #endif
 416 #if defined(CONFIG_CMD_NFS)
 417                 case NFS:
 418                         NfsStart();
 419                         break;
 420 #endif
 421 #if defined(CONFIG_CMD_CDP)
 422                 case CDP:
 423                         CDPStart();
 424                         break;
 425 #endif
 426 #ifdef CONFIG_NETCONSOLE
 427                 case NETCONS:
 428                         NcStart();
 429                         break;
 430 #endif
 431 #if defined(CONFIG_CMD_SNTP)
 432                 case SNTP:
 433                         SntpStart();
 434                         break;
 435 #endif
 436 #if defined(CONFIG_CMD_DNS)
 437                 case DNS:
 438                         DnsStart();
 439                         break;
 440 #endif
 441                 default:
 442                         break;
 443                 }
 444
 445                 NetBootFileXferSize = 0;
 446                 break;
 447         }
 448
 449 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 450 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
 451         /*
 452          * Echo the inverted link state to the fault LED.
 453          */
 454         if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
 455                 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
 456         } else {
 457                 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
 458         }
 459 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
 460 #endif /* CONFIG_MII, ... */
 461
 462         /*
 463          *      Main packet reception loop.  Loop receiving packets until
 464          *      someone sets `NetState' to a state that terminates.
 465          */
 466         for (;;) {
 467                 WATCHDOG_RESET();
 468 #ifdef CONFIG_SHOW_ACTIVITY
 469                 {
 470                         extern void show_activity(int arg);
 471                         show_activity(1);
 472                 }
 473 #endif
 474                 /*
 475                  *      Check the ethernet for a new packet.  The ethernet
 476                  *      receive routine will process it.
 477                  */
 478                 eth_rx();
 479
 480                 /*
 481                  *      Abort if ctrl-c was pressed.
 482                  */
 483                 if (ctrlc()) {
 484                         eth_halt();
 485                         puts ("\nAbort\n");
 486                         return (-1);
 487                 }
 488
 489                 ArpTimeoutCheck();
 490
 491                 /*
 492                  *      Check for a timeout, and run the timeout handler
 493                  *      if we have one.
 494                  */
 495                 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
 496                         thand_f *x;
 497
 498 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 499 #  if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
 500       defined(CONFIG_STATUS_LED) &&        \
 501       defined(STATUS_LED_RED)
 502                         /*
 503                          * Echo the inverted link state to the fault LED.
 504                          */
 505                         if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
 506                                 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
 507                         } else {
 508                                 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
 509                         }
 510 #  endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
 511 #endif /* CONFIG_MII, ... */
 512                         x = timeHandler;
 513                         timeHandler = (thand_f *)0;
 514                         (*x)();
 515                 }
 516
 517
 518                 switch (NetState) {
 519
 520                 case NETLOOP_RESTART:
 521 #ifdef CONFIG_NET_MULTI
 522                         NetRestarted = 1;
 523 #endif
 524                         goto restart;
 525
 526                 case NETLOOP_SUCCESS:
 527                         if (NetBootFileXferSize > 0) {
 528                                 char buf[20];
 529                                 printf("Bytes transferred = %ld (%lx hex)\n",
 530                                         NetBootFileXferSize,
 531                                         NetBootFileXferSize);
 532                                 sprintf(buf, "%lX", NetBootFileXferSize);
 533                                 setenv("filesize", buf);
 534
 535                                 sprintf(buf, "%lX", (unsigned long)load_addr);
 536                                 setenv("fileaddr", buf);
 537                         }
 538                         eth_halt();
 539                         return NetBootFileXferSize;
 540
 541                 case NETLOOP_FAIL:
 542                         return (-1);
 543                 }
 544         }
 545 }
 546
 547 /**********************************************************************/
 548
 549 static void
 550 startAgainTimeout(void)
 551 {
 552         NetState = NETLOOP_RESTART;
 553 }
 554
 555 static void
 556 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
 557 {
 558         /* Totally ignore the packet */
 559 }
 560
 561 void NetStartAgain (void)
 562 {
 563         char *nretry;
 564         int retry_forever = 0;
 565         unsigned long retrycnt = 0;
 566
 567         nretry = getenv("netretry");
 568         if (nretry) {
 569                 if (!strcmp(nretry, "yes"))
 570                         retry_forever = 1;
 571                 else if (!strcmp(nretry, "no"))
 572                         retrycnt = 0;
 573                 else if (!strcmp(nretry, "once"))
 574                         retrycnt = 1;
 575                 else
 576                         retrycnt = simple_strtoul(nretry, NULL, 0);
 577         } else
 578                 retry_forever = 1;
 579
 580         if ((!retry_forever) && (NetTryCount >= retrycnt)) {
 581                 eth_halt();
 582                 NetState = NETLOOP_FAIL;
 583                 return;
 584         }
 585
 586         NetTryCount++;
 587
 588 #ifndef CONFIG_NET_MULTI
 589         NetSetTimeout (10000UL, startAgainTimeout);
 590         NetSetHandler (startAgainHandler);
 591 #else   /* !CONFIG_NET_MULTI*/
 592         eth_halt ();
 593 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
 594         eth_try_another (!NetRestarted);
 595 #endif
 596         eth_init (gd->bd);
 597         if (NetRestartWrap) {
 598                 NetRestartWrap = 0;
 599                 if (NetDevExists) {
 600                         NetSetTimeout (10000UL, startAgainTimeout);
 601                         NetSetHandler (startAgainHandler);
 602                 } else {
 603                         NetState = NETLOOP_FAIL;
 604                 }
 605         } else {
 606                 NetState = NETLOOP_RESTART;
 607         }
 608 #endif  /* CONFIG_NET_MULTI */
 609 }
 610
 611 /**********************************************************************/
 612 /*
 613  *      Miscelaneous bits.
 614  */
 615
 616 void
 617 NetSetHandler(rxhand_f * f)
 618 {
 619         packetHandler = f;
 620 }
 621
 622
 623 void
 624 NetSetTimeout(ulong iv, thand_f * f)
 625 {
 626         if (iv == 0) {
 627                 timeHandler = (thand_f *)0;
 628         } else {
 629                 timeHandler = f;
 630                 timeStart = get_timer(0);
 631                 timeDelta = iv;
 632         }
 633 }
 634
 635
 636 void
 637 NetSendPacket(volatile uchar * pkt, int len)
 638 {
 639         (void) eth_send(pkt, len);
 640 }
 641
 642 int
 643 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
 644 {
 645         uchar *pkt;
 646
 647         /* convert to new style broadcast */
 648         if (dest == 0)
 649                 dest = 0xFFFFFFFF;
 650
 651         /* if broadcast, make the ether address a broadcast and don't do ARP */
 652         if (dest == 0xFFFFFFFF)
 653                 ether = NetBcastAddr;
 654
 655         /* if MAC address was not discovered yet, save the packet and do an ARP request */
 656         if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
 657
 658                 debug("sending ARP for %08lx\n", dest);
 659
 660                 NetArpWaitPacketIP = dest;
 661                 NetArpWaitPacketMAC = ether;
 662
 663                 pkt = NetArpWaitTxPacket;
 664                 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
 665
 666                 NetSetIP (pkt, dest, dport, sport, len);
 667                 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
 668
 669                 /* size of the waiting packet */
 670                 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
 671
 672                 /* and do the ARP request */
 673                 NetArpWaitTry = 1;
 674                 NetArpWaitTimerStart = get_timer(0);
 675                 ArpRequest();
 676                 return 1;       /* waiting */
 677         }
 678
 679         debug("sending UDP to %08lx/%pM\n", dest, ether);
 680
 681         pkt = (uchar *)NetTxPacket;
 682         pkt += NetSetEther (pkt, ether, PROT_IP);
 683         NetSetIP (pkt, dest, dport, sport, len);
 684         (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
 685
 686         return 0;       /* transmitted */
 687 }
 688
 689 #if defined(CONFIG_CMD_PING)
 690 static ushort PingSeqNo;
 691
 692 int PingSend(void)
 693 {
 694         static uchar mac[6];
 695         volatile IP_t *ip;
 696         volatile ushort *s;
 697         uchar *pkt;
 698
 699         /* XXX always send arp request */
 700
 701         memcpy(mac, NetEtherNullAddr, 6);
 702
 703         debug("sending ARP for %08lx\n", NetPingIP);
 704
 705         NetArpWaitPacketIP = NetPingIP;
 706         NetArpWaitPacketMAC = mac;
 707
 708         pkt = NetArpWaitTxPacket;
 709         pkt += NetSetEther(pkt, mac, PROT_IP);
 710
 711         ip = (volatile IP_t *)pkt;
 712
 713         /*
 714          *      Construct an IP and ICMP header.  (need to set no fragment bit - XXX)
 715          */
 716         ip->ip_hl_v  = 0x45;            /* IP_HDR_SIZE / 4 (not including UDP) */
 717         ip->ip_tos   = 0;
 718         ip->ip_len   = htons(IP_HDR_SIZE_NO_UDP + 8);
 719         ip->ip_id    = htons(NetIPID++);
 720         ip->ip_off   = htons(IP_FLAGS_DFRAG);   /* Don't fragment */
 721         ip->ip_ttl   = 255;
 722         ip->ip_p     = 0x01;            /* ICMP */
 723         ip->ip_sum   = 0;
 724         NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
 725         NetCopyIP((void*)&ip->ip_dst, &NetPingIP);         /* - "" - */
 726         ip->ip_sum   = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
 727
 728         s = &ip->udp_src;               /* XXX ICMP starts here */
 729         s[0] = htons(0x0800);           /* echo-request, code */
 730         s[1] = 0;                       /* checksum */
 731         s[2] = 0;                       /* identifier */
 732         s[3] = htons(PingSeqNo++);      /* sequence number */
 733         s[1] = ~NetCksum((uchar *)s, 8/2);
 734
 735         /* size of the waiting packet */
 736         NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
 737
 738         /* and do the ARP request */
 739         NetArpWaitTry = 1;
 740         NetArpWaitTimerStart = get_timer(0);
 741         ArpRequest();
 742         return 1;       /* waiting */
 743 }
 744
 745 static void
 746 PingTimeout (void)
 747 {
 748         eth_halt();
 749         NetState = NETLOOP_FAIL;        /* we did not get the reply */
 750 }
 751
 752 static void
 753 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
 754 {
 755         IPaddr_t tmp;
 756         volatile IP_t *ip = (volatile IP_t *)pkt;
 757
 758         tmp = NetReadIP((void *)&ip->ip_src);
 759         if (tmp != NetPingIP)
 760                 return;
 761
 762         NetState = NETLOOP_SUCCESS;
 763 }
 764
 765 static void PingStart(void)
 766 {
 767 #if defined(CONFIG_NET_MULTI)
 768         printf ("Using %s device\n", eth_get_name());
 769 #endif  /* CONFIG_NET_MULTI */
 770         NetSetTimeout (10000UL, PingTimeout);
 771         NetSetHandler (PingHandler);
 772
 773         PingSend();
 774 }
 775 #endif
 776
 777 #if defined(CONFIG_CMD_CDP)
 778
 779 #define CDP_DEVICE_ID_TLV               0x0001
 780 #define CDP_ADDRESS_TLV                 0x0002
 781 #define CDP_PORT_ID_TLV                 0x0003
 782 #define CDP_CAPABILITIES_TLV            0x0004
 783 #define CDP_VERSION_TLV                 0x0005
 784 #define CDP_PLATFORM_TLV                0x0006
 785 #define CDP_NATIVE_VLAN_TLV             0x000a
 786 #define CDP_APPLIANCE_VLAN_TLV          0x000e
 787 #define CDP_TRIGGER_TLV                 0x000f
 788 #define CDP_POWER_CONSUMPTION_TLV       0x0010
 789 #define CDP_SYSNAME_TLV                 0x0014
 790 #define CDP_SYSOBJECT_TLV               0x0015
 791 #define CDP_MANAGEMENT_ADDRESS_TLV      0x0016
 792
 793 #define CDP_TIMEOUT                     250UL   /* one packet every 250ms */
 794
 795 static int CDPSeq;
 796 static int CDPOK;
 797
 798 ushort CDPNativeVLAN;
 799 ushort CDPApplianceVLAN;
 800
 801 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
 802
 803 static ushort CDP_compute_csum(const uchar *buff, ushort len)
 804 {
 805         ushort csum;
 806         int     odd;
 807         ulong   result = 0;
 808         ushort  leftover;
 809         ushort *p;
 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                         p = (ushort *)buff;
 820                         result += *p++;
 821                         buff = (uchar *)p;
 822                         if (result & 0x80000000)
 823                                 result = (result & 0xFFFF) + (result >> 16);
 824                         len -= 2;
 825                 }
 826                 if (len) {
 827                         leftover = (signed short)(*(const signed char *)buff);
 828                         /* CISCO SUCKS big time! (and blows too):
 829                          * CDP uses the IP checksum algorithm with a twist;
 830                          * for the last byte it *sign* extends and sums.
 831                          */
 832                         result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
 833                 }
 834                 while (result >> 16)
 835                         result = (result & 0xFFFF) + (result >> 16);
 836
 837                 if (odd)
 838                         result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
 839         }
 840
 841         /* add up 16-bit and 17-bit words for 17+c bits */
 842         result = (result & 0xffff) + (result >> 16);
 843         /* add up 16-bit and 2-bit for 16+c bit */
 844         result = (result & 0xffff) + (result >> 16);
 845         /* add up carry.. */
 846         result = (result & 0xffff) + (result >> 16);
 847
 848         /* negate */
 849         csum = ~(ushort)result;
 850
 851         /* run time endian detection */
 852         if (csum != htons(csum))        /* little endian */
 853                 csum = htons(csum);
 854
 855         return csum;
 856 }
 857
 858 int CDPSendTrigger(void)
 859 {
 860         volatile uchar *pkt;
 861         volatile ushort *s;
 862         volatile ushort *cp;
 863         Ethernet_t *et;
 864         int len;
 865         ushort chksum;
 866 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID)   || \
 867     defined(CONFIG_CDP_VERSION)   || defined(CONFIG_CDP_PLATFORM)
 868         char buf[32];
 869 #endif
 870
 871         pkt = NetTxPacket;
 872         et = (Ethernet_t *)pkt;
 873
 874         /* NOTE: trigger sent not on any VLAN */
 875
 876         /* form ethernet header */
 877         memcpy(et->et_dest, NetCDPAddr, 6);
 878         memcpy(et->et_src, NetOurEther, 6);
 879
 880         pkt += ETHER_HDR_SIZE;
 881
 882         /* SNAP header */
 883         memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
 884         pkt += sizeof(CDP_SNAP_hdr);
 885
 886         /* CDP header */
 887         *pkt++ = 0x02;                          /* CDP version 2 */
 888         *pkt++ = 180;                           /* TTL */
 889         s = (volatile ushort *)pkt;
 890         cp = s;
 891         *s++ = htons(0);                        /* checksum (0 for later calculation) */
 892
 893         /* CDP fields */
 894 #ifdef CONFIG_CDP_DEVICE_ID
 895         *s++ = htons(CDP_DEVICE_ID_TLV);
 896         *s++ = htons(CONFIG_CDP_DEVICE_ID);
 897         sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
 898         memcpy((uchar *)s, buf, 16);
 899         s += 16 / 2;
 900 #endif
 901
 902 #ifdef CONFIG_CDP_PORT_ID
 903         *s++ = htons(CDP_PORT_ID_TLV);
 904         memset(buf, 0, sizeof(buf));
 905         sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
 906         len = strlen(buf);
 907         if (len & 1)    /* make it even */
 908                 len++;
 909         *s++ = htons(len + 4);
 910         memcpy((uchar *)s, buf, len);
 911         s += len / 2;
 912 #endif
 913
 914 #ifdef CONFIG_CDP_CAPABILITIES
 915         *s++ = htons(CDP_CAPABILITIES_TLV);
 916         *s++ = htons(8);
 917         *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
 918         s += 2;
 919 #endif
 920
 921 #ifdef CONFIG_CDP_VERSION
 922         *s++ = htons(CDP_VERSION_TLV);
 923         memset(buf, 0, sizeof(buf));
 924         strcpy(buf, CONFIG_CDP_VERSION);
 925         len = strlen(buf);
 926         if (len & 1)    /* make it even */
 927                 len++;
 928         *s++ = htons(len + 4);
 929         memcpy((uchar *)s, buf, len);
 930         s += len / 2;
 931 #endif
 932
 933 #ifdef CONFIG_CDP_PLATFORM
 934         *s++ = htons(CDP_PLATFORM_TLV);
 935         memset(buf, 0, sizeof(buf));
 936         strcpy(buf, CONFIG_CDP_PLATFORM);
 937         len = strlen(buf);
 938         if (len & 1)    /* make it even */
 939                 len++;
 940         *s++ = htons(len + 4);
 941         memcpy((uchar *)s, buf, len);
 942         s += len / 2;
 943 #endif
 944
 945 #ifdef CONFIG_CDP_TRIGGER
 946         *s++ = htons(CDP_TRIGGER_TLV);
 947         *s++ = htons(8);
 948         *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
 949         s += 2;
 950 #endif
 951
 952 #ifdef CONFIG_CDP_POWER_CONSUMPTION
 953         *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
 954         *s++ = htons(6);
 955         *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
 956 #endif
 957
 958         /* length of ethernet packet */
 959         len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
 960         et->et_protlen = htons(len);
 961
 962         len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
 963         chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
 964         if (chksum == 0)
 965                 chksum = 0xFFFF;
 966         *cp = htons(chksum);
 967
 968         (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
 969         return 0;
 970 }
 971
 972 static void
 973 CDPTimeout (void)
 974 {
 975         CDPSeq++;
 976
 977         if (CDPSeq < 3) {
 978                 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
 979                 CDPSendTrigger();
 980                 return;
 981         }
 982
 983         /* if not OK try again */
 984         if (!CDPOK)
 985                 NetStartAgain();
 986         else
 987                 NetState = NETLOOP_SUCCESS;
 988 }
 989
 990 static void
 991 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
 992 {
 993         /* nothing */
 994 }
 995
 996 static void
 997 CDPHandler(const uchar * pkt, unsigned len)
 998 {
 999         const uchar *t;
1000         const ushort *ss;
1001         ushort type, tlen;
1002         uchar applid;
1003         ushort vlan, nvlan;
1004
1005         /* minimum size? */
1006         if (len < sizeof(CDP_SNAP_hdr) + 4)
1007                 goto pkt_short;
1008
1009         /* check for valid CDP SNAP header */
1010         if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1011                 return;
1012
1013         pkt += sizeof(CDP_SNAP_hdr);
1014         len -= sizeof(CDP_SNAP_hdr);
1015
1016         /* Version of CDP protocol must be >= 2 and TTL != 0 */
1017         if (pkt[0] < 0x02 || pkt[1] == 0)
1018                 return;
1019
1020         /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1021         if (pkt[0] != 0x02)
1022                 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1023                                 pkt[0] & 0xff);
1024
1025         if (CDP_compute_csum(pkt, len) != 0)
1026                 return;
1027
1028         pkt += 4;
1029         len -= 4;
1030
1031         vlan = htons(-1);
1032         nvlan = htons(-1);
1033         while (len > 0) {
1034                 if (len < 4)
1035                         goto pkt_short;
1036
1037                 ss = (const ushort *)pkt;
1038                 type = ntohs(ss[0]);
1039                 tlen = ntohs(ss[1]);
1040                 if (tlen > len) {
1041                         goto pkt_short;
1042                 }
1043
1044                 pkt += tlen;
1045                 len -= tlen;
1046
1047                 ss += 2;        /* point ss to the data of the TLV */
1048                 tlen -= 4;
1049
1050                 switch (type) {
1051                         case CDP_DEVICE_ID_TLV:
1052                                 break;
1053                         case CDP_ADDRESS_TLV:
1054                                 break;
1055                         case CDP_PORT_ID_TLV:
1056                                 break;
1057                         case CDP_CAPABILITIES_TLV:
1058                                 break;
1059                         case CDP_VERSION_TLV:
1060                                 break;
1061                         case CDP_PLATFORM_TLV:
1062                                 break;
1063                         case CDP_NATIVE_VLAN_TLV:
1064                                 nvlan = *ss;
1065                                 break;
1066                         case CDP_APPLIANCE_VLAN_TLV:
1067                                 t = (const uchar *)ss;
1068                                 while (tlen > 0) {
1069                                         if (tlen < 3)
1070                                                 goto pkt_short;
1071
1072                                         applid = t[0];
1073                                         ss = (const ushort *)(t + 1);
1074
1075 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1076                                         if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1077                                                 vlan = *ss;
1078 #else
1079                                         vlan = ntohs(*ss);      /* XXX will this work; dunno */
1080 #endif
1081                                         t += 3; tlen -= 3;
1082                                 }
1083                                 break;
1084                         case CDP_TRIGGER_TLV:
1085                                 break;
1086                         case CDP_POWER_CONSUMPTION_TLV:
1087                                 break;
1088                         case CDP_SYSNAME_TLV:
1089                                 break;
1090                         case CDP_SYSOBJECT_TLV:
1091                                 break;
1092                         case CDP_MANAGEMENT_ADDRESS_TLV:
1093                                 break;
1094                 }
1095         }
1096
1097         CDPApplianceVLAN = vlan;
1098         CDPNativeVLAN = nvlan;
1099
1100         CDPOK = 1;
1101         return;
1102
1103  pkt_short:
1104         printf("** CDP packet is too short\n");
1105         return;
1106 }
1107
1108 static void CDPStart(void)
1109 {
1110 #if defined(CONFIG_NET_MULTI)
1111         printf ("Using %s device\n", eth_get_name());
1112 #endif
1113         CDPSeq = 0;
1114         CDPOK = 0;
1115
1116         CDPNativeVLAN = htons(-1);
1117         CDPApplianceVLAN = htons(-1);
1118
1119         NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1120         NetSetHandler (CDPDummyHandler);
1121
1122         CDPSendTrigger();
1123 }
1124 #endif
1125
1126 #ifdef CONFIG_IP_DEFRAG
1127 /*
1128  * This function collects fragments in a single packet, according
1129  * to the algorithm in RFC815. It returns NULL or the pointer to
1130  * a complete packet, in static storage
1131  */
1132 #ifndef CONFIG_NET_MAXDEFRAG
1133 #define CONFIG_NET_MAXDEFRAG 16384
1134 #endif
1135 /*
1136  * MAXDEFRAG, above, is chosen in the config file and  is real data
1137  * so we need to add the NFS overhead, which is more than TFTP.
1138  * To use sizeof in the internal unnamed structures, we need a real
1139  * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
1140  * The compiler doesn't complain nor allocates the actual structure
1141  */
1142 static struct rpc_t rpc_specimen;
1143 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
1144
1145 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
1146
1147 /*
1148  * this is the packet being assembled, either data or frag control.
1149  * Fragments go by 8 bytes, so this union must be 8 bytes long
1150  */
1151 struct hole {
1152         /* first_byte is address of this structure */
1153         u16 last_byte;  /* last byte in this hole + 1 (begin of next hole) */
1154         u16 next_hole;  /* index of next (in 8-b blocks), 0 == none */
1155         u16 prev_hole;  /* index of prev, 0 == none */
1156         u16 unused;
1157 };
1158
1159 static IP_t *__NetDefragment(IP_t *ip, int *lenp)
1160 {
1161         static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN)));
1162         static u16 first_hole, total_len;
1163         struct hole *payload, *thisfrag, *h, *newh;
1164         IP_t *localip = (IP_t *)pkt_buff;
1165         uchar *indata = (uchar *)ip;
1166         int offset8, start, len, done = 0;
1167         u16 ip_off = ntohs(ip->ip_off);
1168
1169         /* payload starts after IP header, this fragment is in there */
1170         payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
1171         offset8 =  (ip_off & IP_OFFS);
1172         thisfrag = payload + offset8;
1173         start = offset8 * 8;
1174         len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
1175
1176         if (start + len > IP_MAXUDP) /* fragment extends too far */
1177                 return NULL;
1178
1179         if (!total_len || localip->ip_id != ip->ip_id) {
1180                 /* new (or different) packet, reset structs */
1181                 total_len = 0xffff;
1182                 payload[0].last_byte = ~0;
1183                 payload[0].next_hole = 0;
1184                 payload[0].prev_hole = 0;
1185                 first_hole = 0;
1186                 /* any IP header will work, copy the first we received */
1187                 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
1188         }
1189
1190         /*
1191          * What follows is the reassembly algorithm. We use the payload
1192          * array as a linked list of hole descriptors, as each hole starts
1193          * at a multiple of 8 bytes. However, last byte can be whatever value,
1194          * so it is represented as byte count, not as 8-byte blocks.
1195          */
1196
1197         h = payload + first_hole;
1198         while (h->last_byte < start) {
1199                 if (!h->next_hole) {
1200                         /* no hole that far away */
1201                         return NULL;
1202                 }
1203                 h = payload + h->next_hole;
1204         }
1205
1206         if (offset8 + (len / 8) <= h - payload) {
1207                 /* no overlap with holes (dup fragment?) */
1208                 return NULL;
1209         }
1210
1211         if (!(ip_off & IP_FLAGS_MFRAG)) {
1212                 /* no more fragmentss: truncate this (last) hole */
1213                 total_len = start + len;
1214                 h->last_byte = start + len;
1215         }
1216
1217         /*
1218          * There is some overlap: fix the hole list. This code doesn't
1219          * deal with a fragment that overlaps with two different holes
1220          * (thus being a superset of a previously-received fragment).
1221          */
1222
1223         if ( (h >= thisfrag) && (h->last_byte <= start + len) ) {
1224                 /* complete overlap with hole: remove hole */
1225                 if (!h->prev_hole && !h->next_hole) {
1226                         /* last remaining hole */
1227                         done = 1;
1228                 } else if (!h->prev_hole) {
1229                         /* first hole */
1230                         first_hole = h->next_hole;
1231                         payload[h->next_hole].prev_hole = 0;
1232                 } else if (!h->next_hole) {
1233                         /* last hole */
1234                         payload[h->prev_hole].next_hole = 0;
1235                 } else {
1236                         /* in the middle of the list */
1237                         payload[h->next_hole].prev_hole = h->prev_hole;
1238                         payload[h->prev_hole].next_hole = h->next_hole;
1239                 }
1240
1241         } else if (h->last_byte <= start + len) {
1242                 /* overlaps with final part of the hole: shorten this hole */
1243                 h->last_byte = start;
1244
1245         } else if (h >= thisfrag) {
1246                 /* overlaps with initial part of the hole: move this hole */
1247                 newh = thisfrag + (len / 8);
1248                 *newh = *h;
1249                 h = newh;
1250                 if (h->next_hole)
1251                         payload[h->next_hole].prev_hole = (h - payload);
1252                 if (h->prev_hole)
1253                         payload[h->prev_hole].next_hole = (h - payload);
1254                 else
1255                         first_hole = (h - payload);
1256
1257         } else {
1258                 /* fragment sits in the middle: split the hole */
1259                 newh = thisfrag + (len / 8);
1260                 *newh = *h;
1261                 h->last_byte = start;
1262                 h->next_hole = (newh - payload);
1263                 newh->prev_hole = (h - payload);
1264                 if (newh->next_hole)
1265                         payload[newh->next_hole].prev_hole = (newh - payload);
1266         }
1267
1268         /* finally copy this fragment and possibly return whole packet */
1269         memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
1270         if (!done)
1271                 return NULL;
1272
1273         localip->ip_len = htons(total_len);
1274         *lenp = total_len + IP_HDR_SIZE_NO_UDP;
1275         return localip;
1276 }
1277
1278 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1279 {
1280         u16 ip_off = ntohs(ip->ip_off);
1281         if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1282                 return ip; /* not a fragment */
1283         return __NetDefragment(ip, lenp);
1284 }
1285
1286 #else /* !CONFIG_IP_DEFRAG */
1287
1288 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1289 {
1290         u16 ip_off = ntohs(ip->ip_off);
1291         if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1292                 return ip; /* not a fragment */
1293         return NULL;
1294 }
1295 #endif
1296
1297 void
1298 NetReceive(volatile uchar * inpkt, int len)
1299 {
1300         Ethernet_t *et;
1301         IP_t    *ip;
1302         ARP_t   *arp;
1303         IPaddr_t tmp;
1304         int     x;
1305         uchar *pkt;
1306 #if defined(CONFIG_CMD_CDP)
1307         int iscdp;
1308 #endif
1309         ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1310
1311         debug("packet received\n");
1312
1313         NetRxPacket = inpkt;
1314         NetRxPacketLen = len;
1315         et = (Ethernet_t *)inpkt;
1316
1317         /* too small packet? */
1318         if (len < ETHER_HDR_SIZE)
1319                 return;
1320
1321 #ifdef CONFIG_API
1322         if (push_packet) {
1323                 (*push_packet)(inpkt, len);
1324                 return;
1325         }
1326 #endif
1327
1328 #if defined(CONFIG_CMD_CDP)
1329         /* keep track if packet is CDP */
1330         iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1331 #endif
1332
1333         myvlanid = ntohs(NetOurVLAN);
1334         if (myvlanid == (ushort)-1)
1335                 myvlanid = VLAN_NONE;
1336         mynvlanid = ntohs(NetOurNativeVLAN);
1337         if (mynvlanid == (ushort)-1)
1338                 mynvlanid = VLAN_NONE;
1339
1340         x = ntohs(et->et_protlen);
1341
1342         debug("packet received\n");
1343
1344         if (x < 1514) {
1345                 /*
1346                  *      Got a 802 packet.  Check the other protocol field.
1347                  */
1348                 x = ntohs(et->et_prot);
1349
1350                 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1351                 len -= E802_HDR_SIZE;
1352
1353         } else if (x != PROT_VLAN) {    /* normal packet */
1354                 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1355                 len -= ETHER_HDR_SIZE;
1356
1357         } else {                        /* VLAN packet */
1358                 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1359
1360                 debug("VLAN packet received\n");
1361
1362                 /* too small packet? */
1363                 if (len < VLAN_ETHER_HDR_SIZE)
1364                         return;
1365
1366                 /* if no VLAN active */
1367                 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1368 #if defined(CONFIG_CMD_CDP)
1369                                 && iscdp == 0
1370 #endif
1371                                 )
1372                         return;
1373
1374                 cti = ntohs(vet->vet_tag);
1375                 vlanid = cti & VLAN_IDMASK;
1376                 x = ntohs(vet->vet_type);
1377
1378                 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1379                 len -= VLAN_ETHER_HDR_SIZE;
1380         }
1381
1382         debug("Receive from protocol 0x%x\n", x);
1383
1384 #if defined(CONFIG_CMD_CDP)
1385         if (iscdp) {
1386                 CDPHandler((uchar *)ip, len);
1387                 return;
1388         }
1389 #endif
1390
1391         if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1392                 if (vlanid == VLAN_NONE)
1393                         vlanid = (mynvlanid & VLAN_IDMASK);
1394                 /* not matched? */
1395                 if (vlanid != (myvlanid & VLAN_IDMASK))
1396                         return;
1397         }
1398
1399         switch (x) {
1400
1401         case PROT_ARP:
1402                 /*
1403                  * We have to deal with two types of ARP packets:
1404                  * - REQUEST packets will be answered by sending  our
1405                  *   IP address - if we know it.
1406                  * - REPLY packates are expected only after we asked
1407                  *   for the TFTP server's or the gateway's ethernet
1408                  *   address; so if we receive such a packet, we set
1409                  *   the server ethernet address
1410                  */
1411                 debug("Got ARP\n");
1412
1413                 arp = (ARP_t *)ip;
1414                 if (len < ARP_HDR_SIZE) {
1415                         printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1416                         return;
1417                 }
1418                 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1419                         return;
1420                 }
1421                 if (ntohs(arp->ar_pro) != PROT_IP) {
1422                         return;
1423                 }
1424                 if (arp->ar_hln != 6) {
1425                         return;
1426                 }
1427                 if (arp->ar_pln != 4) {
1428                         return;
1429                 }
1430
1431                 if (NetOurIP == 0) {
1432                         return;
1433                 }
1434
1435                 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1436                         return;
1437                 }
1438
1439                 switch (ntohs(arp->ar_op)) {
1440                 case ARPOP_REQUEST:             /* reply with our IP address    */
1441                         debug("Got ARP REQUEST, return our IP\n");
1442                         pkt = (uchar *)et;
1443                         pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1444                         arp->ar_op = htons(ARPOP_REPLY);
1445                         memcpy   (&arp->ar_data[10], &arp->ar_data[0], 6);
1446                         NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1447                         memcpy   (&arp->ar_data[ 0], NetOurEther, 6);
1448                         NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1449                         (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1450                         return;
1451
1452                 case ARPOP_REPLY:               /* arp reply */
1453                         /* are we waiting for a reply */
1454                         if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1455                                 break;
1456
1457 #ifdef CONFIG_KEEP_SERVERADDR
1458                         if (NetServerIP == NetArpWaitPacketIP) {
1459                                 char buf[20];
1460                                 sprintf(buf, "%pM", arp->ar_data);
1461                                 setenv("serveraddr", buf);
1462                         }
1463 #endif
1464
1465                         debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1466                                 arp->ar_data);
1467
1468                         tmp = NetReadIP(&arp->ar_data[6]);
1469
1470                         /* matched waiting packet's address */
1471                         if (tmp == NetArpWaitReplyIP) {
1472                                 debug("Got it\n");
1473                                 /* save address for later use */
1474                                 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1475
1476 #ifdef CONFIG_NETCONSOLE
1477                                 (*packetHandler)(0,0,0,0);
1478 #endif
1479                                 /* modify header, and transmit it */
1480                                 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1481                                 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1482
1483                                 /* no arp request pending now */
1484                                 NetArpWaitPacketIP = 0;
1485                                 NetArpWaitTxPacketSize = 0;
1486                                 NetArpWaitPacketMAC = NULL;
1487
1488                         }
1489                         return;
1490                 default:
1491                         debug("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1492                         return;
1493                 }
1494                 break;
1495
1496         case PROT_RARP:
1497                 debug("Got RARP\n");
1498                 arp = (ARP_t *)ip;
1499                 if (len < ARP_HDR_SIZE) {
1500                         printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1501                         return;
1502                 }
1503
1504                 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1505                         (ntohs(arp->ar_hrd) != ARP_ETHER)   ||
1506                         (ntohs(arp->ar_pro) != PROT_IP)     ||
1507                         (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1508
1509                         puts ("invalid RARP header\n");
1510                 } else {
1511                         NetCopyIP(&NetOurIP,    &arp->ar_data[16]);
1512                         if (NetServerIP == 0)
1513                                 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1514                         memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1515
1516                         (*packetHandler)(0,0,0,0);
1517                 }
1518                 break;
1519
1520         case PROT_IP:
1521                 debug("Got IP\n");
1522                 /* Before we start poking the header, make sure it is there */
1523                 if (len < IP_HDR_SIZE) {
1524                         debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1525                         return;
1526                 }
1527                 /* Check the packet length */
1528                 if (len < ntohs(ip->ip_len)) {
1529                         printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1530                         return;
1531                 }
1532                 len = ntohs(ip->ip_len);
1533                 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1534
1535                 /* Can't deal with anything except IPv4 */
1536                 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1537                         return;
1538                 }
1539                 /* Can't deal with IP options (headers != 20 bytes) */
1540                 if ((ip->ip_hl_v & 0x0f) > 0x05) {
1541                         return;
1542                 }
1543                 /* Check the Checksum of the header */
1544                 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1545                         puts ("checksum bad\n");
1546                         return;
1547                 }
1548                 /* If it is not for us, ignore it */
1549                 tmp = NetReadIP(&ip->ip_dst);
1550                 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1551 #ifdef CONFIG_MCAST_TFTP
1552                         if (Mcast_addr != tmp)
1553 #endif
1554                         return;
1555                 }
1556                 /*
1557                  * The function returns the unchanged packet if it's not
1558                  * a fragment, and either the complete packet or NULL if
1559                  * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1560                  */
1561                 if (!(ip = NetDefragment(ip, &len)))
1562                         return;
1563                 /*
1564                  * watch for ICMP host redirects
1565                  *
1566                  * There is no real handler code (yet). We just watch
1567                  * for ICMP host redirect messages. In case anybody
1568                  * sees these messages: please contact me
1569                  * (wd@denx.de), or - even better - send me the
1570                  * necessary fixes :-)
1571                  *
1572                  * Note: in all cases where I have seen this so far
1573                  * it was a problem with the router configuration,
1574                  * for instance when a router was configured in the
1575                  * BOOTP reply, but the TFTP server was on the same
1576                  * subnet. So this is probably a warning that your
1577                  * configuration might be wrong. But I'm not really
1578                  * sure if there aren't any other situations.
1579                  */
1580                 if (ip->ip_p == IPPROTO_ICMP) {
1581                         ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1582
1583                         switch (icmph->type) {
1584                         case ICMP_REDIRECT:
1585                                 if (icmph->code != ICMP_REDIR_HOST)
1586                                         return;
1587                                 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway);
1588                                 return;
1589 #if defined(CONFIG_CMD_PING)
1590                         case ICMP_ECHO_REPLY:
1591                                 /*
1592                                  *      IP header OK.  Pass the packet to the current handler.
1593                                  */
1594                                 /* XXX point to ip packet */
1595                                 (*packetHandler)((uchar *)ip, 0, 0, 0);
1596                                 return;
1597                         case ICMP_ECHO_REQUEST:
1598                                 debug("Got ICMP ECHO REQUEST, return %d bytes \n",
1599                                         ETHER_HDR_SIZE + len);
1600
1601                                 memcpy (&et->et_dest[0], &et->et_src[0], 6);
1602                                 memcpy (&et->et_src[ 0], NetOurEther, 6);
1603
1604                                 ip->ip_sum = 0;
1605                                 ip->ip_off = 0;
1606                                 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1607                                 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1608                                 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
1609
1610                                 icmph->type = ICMP_ECHO_REPLY;
1611                                 icmph->checksum = 0;
1612                                 icmph->checksum = ~NetCksum((uchar *)icmph,
1613                                                 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1614                                 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
1615                                 return;
1616 #endif
1617                         default:
1618                                 return;
1619                         }
1620                 } else if (ip->ip_p != IPPROTO_UDP) {   /* Only UDP packets */
1621                         return;
1622                 }
1623
1624 #ifdef CONFIG_UDP_CHECKSUM
1625                 if (ip->udp_xsum != 0) {
1626                         ulong   xsum;
1627                         ushort *sumptr;
1628                         ushort  sumlen;
1629
1630                         xsum  = ip->ip_p;
1631                         xsum += (ntohs(ip->udp_len));
1632                         xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1633                         xsum += (ntohl(ip->ip_src) >>  0) & 0x0000ffff;
1634                         xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1635                         xsum += (ntohl(ip->ip_dst) >>  0) & 0x0000ffff;
1636
1637                         sumlen = ntohs(ip->udp_len);
1638                         sumptr = (ushort *) &(ip->udp_src);
1639
1640                         while (sumlen > 1) {
1641                                 ushort sumdata;
1642
1643                                 sumdata = *sumptr++;
1644                                 xsum += ntohs(sumdata);
1645                                 sumlen -= 2;
1646                         }
1647                         if (sumlen > 0) {
1648                                 ushort sumdata;
1649
1650                                 sumdata = *(unsigned char *) sumptr;
1651                                 sumdata = (sumdata << 8) & 0xff00;
1652                                 xsum += sumdata;
1653                         }
1654                         while ((xsum >> 16) != 0) {
1655                                 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1656                         }
1657                         if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1658                                 printf(" UDP wrong checksum %08lx %08x\n",
1659                                         xsum, ntohs(ip->udp_xsum));
1660                                 return;
1661                         }
1662                 }
1663 #endif
1664
1665
1666 #ifdef CONFIG_NETCONSOLE
1667                 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1668                                                 ntohs(ip->udp_dst),
1669                                                 ntohs(ip->udp_src),
1670                                                 ntohs(ip->udp_len) - 8);
1671 #endif
1672                 /*
1673                  *      IP header OK.  Pass the packet to the current handler.
1674                  */
1675                 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1676                                                 ntohs(ip->udp_dst),
1677                                                 ntohs(ip->udp_src),
1678                                                 ntohs(ip->udp_len) - 8);
1679                 break;
1680         }
1681 }
1682
1683
1684 /**********************************************************************/
1685
1686 static int net_check_prereq (proto_t protocol)
1687 {
1688         switch (protocol) {
1689                 /* Fall through */
1690 #if defined(CONFIG_CMD_PING)
1691         case PING:
1692                 if (NetPingIP == 0) {
1693                         puts ("*** ERROR: ping address not given\n");
1694                         return (1);
1695                 }
1696                 goto common;
1697 #endif
1698 #if defined(CONFIG_CMD_SNTP)
1699         case SNTP:
1700                 if (NetNtpServerIP == 0) {
1701                         puts ("*** ERROR: NTP server address not given\n");
1702                         return (1);
1703                 }
1704                 goto common;
1705 #endif
1706 #if defined(CONFIG_CMD_DNS)
1707         case DNS:
1708                 if (NetOurDNSIP == 0) {
1709                         puts("*** ERROR: DNS server address not given\n");
1710                         return 1;
1711                 }
1712                 goto common;
1713 #endif
1714 #if defined(CONFIG_CMD_NFS)
1715         case NFS:
1716 #endif
1717         case NETCONS:
1718         case TFTP:
1719                 if (NetServerIP == 0) {
1720                         puts ("*** ERROR: `serverip' not set\n");
1721                         return (1);
1722                 }
1723 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP)
1724     common:
1725 #endif
1726
1727                 if (NetOurIP == 0) {
1728                         puts ("*** ERROR: `ipaddr' not set\n");
1729                         return (1);
1730                 }
1731                 /* Fall through */
1732
1733         case DHCP:
1734         case RARP:
1735         case BOOTP:
1736         case CDP:
1737                 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1738 #ifdef CONFIG_NET_MULTI
1739                         extern int eth_get_dev_index (void);
1740                         int num = eth_get_dev_index ();
1741
1742                         switch (num) {
1743                         case -1:
1744                                 puts ("*** ERROR: No ethernet found.\n");
1745                                 return (1);
1746                         case 0:
1747                                 puts ("*** ERROR: `ethaddr' not set\n");
1748                                 break;
1749                         default:
1750                                 printf ("*** ERROR: `eth%daddr' not set\n",
1751                                         num);
1752                                 break;
1753                         }
1754
1755                         NetStartAgain ();
1756                         return (2);
1757 #else
1758                         puts ("*** ERROR: `ethaddr' not set\n");
1759                         return (1);
1760 #endif
1761                 }
1762                 /* Fall through */
1763         default:
1764                 return (0);
1765         }
1766         return (0);             /* OK */
1767 }
1768 /**********************************************************************/
1769
1770 int
1771 NetCksumOk(uchar * ptr, int len)
1772 {
1773         return !((NetCksum(ptr, len) + 1) & 0xfffe);
1774 }
1775
1776
1777 unsigned
1778 NetCksum(uchar * ptr, int len)
1779 {
1780         ulong   xsum;
1781         ushort *p = (ushort *)ptr;
1782
1783         xsum = 0;
1784         while (len-- > 0)
1785                 xsum += *p++;
1786         xsum = (xsum & 0xffff) + (xsum >> 16);
1787         xsum = (xsum & 0xffff) + (xsum >> 16);
1788         return (xsum & 0xffff);
1789 }
1790
1791 int
1792 NetEthHdrSize(void)
1793 {
1794         ushort myvlanid;
1795
1796         myvlanid = ntohs(NetOurVLAN);
1797         if (myvlanid == (ushort)-1)
1798                 myvlanid = VLAN_NONE;
1799
1800         return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
1801 }
1802
1803 int
1804 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1805 {
1806         Ethernet_t *et = (Ethernet_t *)xet;
1807         ushort myvlanid;
1808
1809         myvlanid = ntohs(NetOurVLAN);
1810         if (myvlanid == (ushort)-1)
1811                 myvlanid = VLAN_NONE;
1812
1813         memcpy (et->et_dest, addr, 6);
1814         memcpy (et->et_src, NetOurEther, 6);
1815         if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1816         et->et_protlen = htons(prot);
1817                 return ETHER_HDR_SIZE;
1818         } else {
1819                 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1820
1821                 vet->vet_vlan_type = htons(PROT_VLAN);
1822                 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1823                 vet->vet_type = htons(prot);
1824                 return VLAN_ETHER_HDR_SIZE;
1825         }
1826 }
1827
1828 void
1829 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1830 {
1831         IP_t *ip = (IP_t *)xip;
1832
1833         /*
1834          *      If the data is an odd number of bytes, zero the
1835          *      byte after the last byte so that the checksum
1836          *      will work.
1837          */
1838         if (len & 1)
1839                 xip[IP_HDR_SIZE + len] = 0;
1840
1841         /*
1842          *      Construct an IP and UDP header.
1843          *      (need to set no fragment bit - XXX)
1844          */
1845         ip->ip_hl_v  = 0x45;            /* IP_HDR_SIZE / 4 (not including UDP) */
1846         ip->ip_tos   = 0;
1847         ip->ip_len   = htons(IP_HDR_SIZE + len);
1848         ip->ip_id    = htons(NetIPID++);
1849         ip->ip_off   = htons(IP_FLAGS_DFRAG);   /* Don't fragment */
1850         ip->ip_ttl   = 255;
1851         ip->ip_p     = 17;              /* UDP */
1852         ip->ip_sum   = 0;
1853         NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
1854         NetCopyIP((void*)&ip->ip_dst, &dest);      /* - "" - */
1855         ip->udp_src  = htons(sport);
1856         ip->udp_dst  = htons(dport);
1857         ip->udp_len  = htons(8 + len);
1858         ip->udp_xsum = 0;
1859         ip->ip_sum   = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1860 }
1861
1862 void copy_filename (char *dst, char *src, int size)
1863 {
1864         if (*src && (*src == '"')) {
1865                 ++src;
1866                 --size;
1867         }
1868
1869         while ((--size > 0) && *src && (*src != '"')) {
1870                 *dst++ = *src++;
1871         }
1872         *dst = '\0';
1873 }
1874
1875 #endif
1876
1877 #if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS)
1878 /*
1879  * make port a little random, but use something trivial to compute
1880  */
1881 unsigned int random_port(void)
1882 {
1883         return 1024 + (get_timer(0) % 0x8000);;
1884 }
1885 #endif
1886
1887 void ip_to_string (IPaddr_t x, char *s)
1888 {
1889         x = ntohl (x);
1890         sprintf (s, "%d.%d.%d.%d",
1891                  (int) ((x >> 24) & 0xff),
1892                  (int) ((x >> 16) & 0xff),
1893                  (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1894         );
1895 }
1896
1897 IPaddr_t string_to_ip(char *s)
1898 {
1899         IPaddr_t addr;
1900         char *e;
1901         int i;
1902
1903         if (s == NULL)
1904                 return(0);
1905
1906         for (addr=0, i=0; i<4; ++i) {
1907                 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
1908                 addr <<= 8;
1909                 addr |= (val & 0xFF);
1910                 if (s) {
1911                         s = (*e) ? e+1 : e;
1912                 }
1913         }
1914
1915         return (htonl(addr));
1916 }
1917
1918 void VLAN_to_string(ushort x, char *s)
1919 {
1920         x = ntohs(x);
1921
1922         if (x == (ushort)-1)
1923                 x = VLAN_NONE;
1924
1925         if (x == VLAN_NONE)
1926                 strcpy(s, "none");
1927         else
1928                 sprintf(s, "%d", x & VLAN_IDMASK);
1929 }
1930
1931 ushort string_to_VLAN(char *s)
1932 {
1933         ushort id;
1934
1935         if (s == NULL)
1936                 return htons(VLAN_NONE);
1937
1938         if (*s < '0' || *s > '9')
1939                 id = VLAN_NONE;
1940         else
1941                 id = (ushort)simple_strtoul(s, NULL, 10);
1942
1943         return htons(id);
1944 }
1945
1946 IPaddr_t getenv_IPaddr (char *var)
1947 {
1948         return (string_to_ip(getenv(var)));
1949 }
1950
1951 ushort getenv_VLAN(char *var)
1952 {
1953         return (string_to_VLAN(getenv(var)));
1954 }