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 #ifdef CONFIG_CMD_RARP
  84 #include "rarp.h"
  85 #endif
  86 #include "nfs.h"
  87 #ifdef CONFIG_STATUS_LED
  88 #include <status_led.h>
  89 #include <miiphy.h>
  90 #endif
  91 #if defined(CONFIG_CMD_SNTP)
  92 #include "sntp.h"
  93 #endif
  94 #if defined(CONFIG_CDP_VERSION)
  95 #include <timestamp.h>
  96 #endif
  97 #if defined(CONFIG_CMD_DNS)
  98 #include "dns.h"
  99 #endif
 100
 101 DECLARE_GLOBAL_DATA_PTR;
 102
 103 #ifndef CONFIG_ARP_TIMEOUT
 104 # define ARP_TIMEOUT            5000UL  /* Milliseconds before trying ARP again */
 105 #else
 106 # define ARP_TIMEOUT            CONFIG_ARP_TIMEOUT
 107 #endif
 108
 109
 110 #ifndef CONFIG_NET_RETRY_COUNT
 111 # define ARP_TIMEOUT_COUNT      5       /* # of timeouts before giving up  */
 112 #else
 113 # define ARP_TIMEOUT_COUNT      CONFIG_NET_RETRY_COUNT
 114 #endif
 115
 116 /** BOOTP EXTENTIONS **/
 117
 118 IPaddr_t        NetOurSubnetMask=0;             /* Our subnet mask (0=unknown)  */
 119 IPaddr_t        NetOurGatewayIP=0;              /* Our gateways IP address      */
 120 IPaddr_t        NetOurDNSIP=0;                  /* Our DNS IP address           */
 121 #if defined(CONFIG_BOOTP_DNS2)
 122 IPaddr_t        NetOurDNS2IP=0;                 /* Our 2nd DNS IP address       */
 123 #endif
 124 char            NetOurNISDomain[32]={0,};       /* Our NIS domain               */
 125 char            NetOurHostName[32]={0,};        /* Our hostname                 */
 126 char            NetOurRootPath[64]={0,};        /* Our bootpath                 */
 127 ushort          NetBootFileSize=0;              /* Our bootfile size in blocks  */
 128
 129 #ifdef CONFIG_MCAST_TFTP        /* Multicast TFTP */
 130 IPaddr_t Mcast_addr;
 131 #endif
 132
 133 /** END OF BOOTP EXTENTIONS **/
 134
 135 ulong           NetBootFileXferSize;    /* The actual transferred size of the bootfile (in bytes) */
 136 uchar           NetOurEther[6];         /* Our ethernet address                 */
 137 uchar           NetServerEther[6] =     /* Boot server enet address             */
 138                         { 0, 0, 0, 0, 0, 0 };
 139 IPaddr_t        NetOurIP;               /* Our IP addr (0 = unknown)            */
 140 IPaddr_t        NetServerIP;            /* Server IP addr (0 = unknown)         */
 141 volatile uchar *NetRxPacket;            /* Current receive packet               */
 142 int             NetRxPacketLen;         /* Current rx packet length             */
 143 unsigned        NetIPID;                /* IP packet ID                         */
 144 uchar           NetBcastAddr[6] =       /* Ethernet bcast address               */
 145                         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 146 uchar           NetEtherNullAddr[6] =
 147                         { 0, 0, 0, 0, 0, 0 };
 148 #ifdef CONFIG_API
 149 void            (*push_packet)(volatile void *, int len) = 0;
 150 #endif
 151 #if defined(CONFIG_CMD_CDP)
 152 uchar           NetCDPAddr[6] =         /* Ethernet bcast address               */
 153                         { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
 154 #endif
 155 int             NetState;               /* Network loop state                   */
 156 #ifdef CONFIG_NET_MULTI
 157 int             NetRestartWrap = 0;     /* Tried all network devices            */
 158 static int      NetRestarted = 0;       /* Network loop restarted               */
 159 static int      NetDevExists = 0;       /* At least one device configured       */
 160 #endif
 161
 162 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
 163 ushort          NetOurVLAN = 0xFFFF;            /* default is without VLAN      */
 164 ushort          NetOurNativeVLAN = 0xFFFF;      /* ditto                        */
 165
 166 char            BootFile[128];          /* Boot File name                       */
 167
 168 #if defined(CONFIG_CMD_PING)
 169 IPaddr_t        NetPingIP;              /* the ip address to ping               */
 170
 171 static void PingStart(void);
 172 #endif
 173
 174 #if defined(CONFIG_CMD_CDP)
 175 static void CDPStart(void);
 176 #endif
 177
 178 #if defined(CONFIG_CMD_SNTP)
 179 IPaddr_t        NetNtpServerIP;         /* NTP server IP address                */
 180 int             NetTimeOffset=0;        /* offset time from UTC                 */
 181 #endif
 182
 183 #ifdef CONFIG_NETCONSOLE
 184 void NcStart(void);
 185 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
 186 #endif
 187
 188 volatile uchar  PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
 189
 190 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets                     */
 191
 192 static rxhand_f *packetHandler;         /* Current RX packet handler            */
 193 static thand_f *timeHandler;            /* Current timeout handler              */
 194 static ulong    timeStart;              /* Time base value                      */
 195 static ulong    timeDelta;              /* Current timeout value                */
 196 volatile uchar *NetTxPacket = 0;        /* THE transmit packet                  */
 197
 198 static int net_check_prereq (proto_t protocol);
 199
 200 static int NetTryCount;
 201
 202 /**********************************************************************/
 203
 204 IPaddr_t        NetArpWaitPacketIP;
 205 IPaddr_t        NetArpWaitReplyIP;
 206 uchar          *NetArpWaitPacketMAC;    /* MAC address of waiting packet's destination  */
 207 uchar          *NetArpWaitTxPacket;     /* THE transmit packet                  */
 208 int             NetArpWaitTxPacketSize;
 209 uchar           NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
 210 ulong           NetArpWaitTimerStart;
 211 int             NetArpWaitTry;
 212
 213 void ArpRequest (void)
 214 {
 215         int i;
 216         volatile uchar *pkt;
 217         ARP_t *arp;
 218
 219         debug("ARP broadcast %d\n", NetArpWaitTry);
 220
 221         pkt = NetTxPacket;
 222
 223         pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
 224
 225         arp = (ARP_t *) pkt;
 226
 227         arp->ar_hrd = htons (ARP_ETHER);
 228         arp->ar_pro = htons (PROT_IP);
 229         arp->ar_hln = 6;
 230         arp->ar_pln = 4;
 231         arp->ar_op = htons (ARPOP_REQUEST);
 232
 233         memcpy (&arp->ar_data[0], NetOurEther, 6);              /* source ET addr       */
 234         NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP);     /* source IP addr       */
 235         for (i = 10; i < 16; ++i) {
 236                 arp->ar_data[i] = 0;                            /* dest ET addr = 0     */
 237         }
 238
 239         if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
 240             (NetOurIP & NetOurSubnetMask)) {
 241                 if (NetOurGatewayIP == 0) {
 242                         puts ("## Warning: gatewayip needed but not set\n");
 243                         NetArpWaitReplyIP = NetArpWaitPacketIP;
 244                 } else {
 245                         NetArpWaitReplyIP = NetOurGatewayIP;
 246                 }
 247         } else {
 248                 NetArpWaitReplyIP = NetArpWaitPacketIP;
 249         }
 250
 251         NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
 252         (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
 253 }
 254
 255 void ArpTimeoutCheck(void)
 256 {
 257         ulong t;
 258
 259         if (!NetArpWaitPacketIP)
 260                 return;
 261
 262         t = get_timer(0);
 263
 264         /* check for arp timeout */
 265         if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
 266                 NetArpWaitTry++;
 267
 268                 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
 269                         puts ("\nARP Retry count exceeded; starting again\n");
 270                         NetArpWaitTry = 0;
 271                         NetStartAgain();
 272                 } else {
 273                         NetArpWaitTimerStart = t;
 274                         ArpRequest();
 275                 }
 276         }
 277 }
 278
 279 static void
 280 NetInitLoop(proto_t protocol)
 281 {
 282         static int env_changed_id = 0;
 283         bd_t *bd = gd->bd;
 284         int env_id = get_env_id ();
 285
 286         /* update only when the environment has changed */
 287         if (env_changed_id != env_id) {
 288                 NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
 289                 NetOurGatewayIP = getenv_IPaddr ("gatewayip");
 290                 NetOurSubnetMask= getenv_IPaddr ("netmask");
 291                 NetServerIP = getenv_IPaddr ("serverip");
 292                 NetOurNativeVLAN = getenv_VLAN("nvlan");
 293                 NetOurVLAN = getenv_VLAN("vlan");
 294 #if defined(CONFIG_CMD_DNS)
 295                 NetOurDNSIP = getenv_IPaddr("dnsip");
 296 #endif
 297                 env_changed_id = env_id;
 298         }
 299
 300         return;
 301 }
 302
 303 /**********************************************************************/
 304 /*
 305  *      Main network processing loop.
 306  */
 307
 308 int
 309 NetLoop(proto_t protocol)
 310 {
 311         bd_t *bd = gd->bd;
 312
 313 #ifdef CONFIG_NET_MULTI
 314         NetRestarted = 0;
 315         NetDevExists = 0;
 316 #endif
 317
 318         /* XXX problem with bss workaround */
 319         NetArpWaitPacketMAC = NULL;
 320         NetArpWaitTxPacket = NULL;
 321         NetArpWaitPacketIP = 0;
 322         NetArpWaitReplyIP = 0;
 323         NetArpWaitTxPacket = NULL;
 324         NetTxPacket = NULL;
 325         NetTryCount = 1;
 326
 327         if (!NetTxPacket) {
 328                 int     i;
 329                 /*
 330                  *      Setup packet buffers, aligned correctly.
 331                  */
 332                 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
 333                 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
 334                 for (i = 0; i < PKTBUFSRX; i++) {
 335                         NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
 336                 }
 337         }
 338
 339         if (!NetArpWaitTxPacket) {
 340                 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
 341                 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
 342                 NetArpWaitTxPacketSize = 0;
 343         }
 344
 345         eth_halt();
 346 #ifdef CONFIG_NET_MULTI
 347         eth_set_current();
 348 #endif
 349         if (eth_init(bd) < 0) {
 350                 eth_halt();
 351                 return(-1);
 352         }
 353
 354 restart:
 355 #ifdef CONFIG_NET_MULTI
 356         memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
 357 #else
 358         eth_getenv_enetaddr("ethaddr", NetOurEther);
 359 #endif
 360
 361         NetState = NETLOOP_CONTINUE;
 362
 363         /*
 364          *      Start the ball rolling with the given start function.  From
 365          *      here on, this code is a state machine driven by received
 366          *      packets and timer events.
 367          */
 368         NetInitLoop(protocol);
 369
 370         switch (net_check_prereq (protocol)) {
 371         case 1:
 372                 /* network not configured */
 373                 eth_halt();
 374                 return (-1);
 375
 376 #ifdef CONFIG_NET_MULTI
 377         case 2:
 378                 /* network device not configured */
 379                 break;
 380 #endif /* CONFIG_NET_MULTI */
 381
 382         case 0:
 383 #ifdef CONFIG_NET_MULTI
 384                 NetDevExists = 1;
 385 #endif
 386                 switch (protocol) {
 387                 case TFTP:
 388                         /* always use ARP to get server ethernet address */
 389                         TftpStart();
 390                         break;
 391
 392 #if defined(CONFIG_CMD_DHCP)
 393                 case DHCP:
 394                         BootpTry = 0;
 395                         NetOurIP = 0;
 396                         DhcpRequest();          /* Basically same as BOOTP */
 397                         break;
 398 #endif
 399
 400                 case BOOTP:
 401                         BootpTry = 0;
 402                         NetOurIP = 0;
 403                         BootpRequest ();
 404                         break;
 405
 406 #if defined(CONFIG_CMD_RARP)
 407                 case RARP:
 408                         RarpTry = 0;
 409                         NetOurIP = 0;
 410                         RarpRequest ();
 411                         break;
 412 #endif
 413 #if defined(CONFIG_CMD_PING)
 414                 case PING:
 415                         PingStart();
 416                         break;
 417 #endif
 418 #if defined(CONFIG_CMD_NFS)
 419                 case NFS:
 420                         NfsStart();
 421                         break;
 422 #endif
 423 #if defined(CONFIG_CMD_CDP)
 424                 case CDP:
 425                         CDPStart();
 426                         break;
 427 #endif
 428 #ifdef CONFIG_NETCONSOLE
 429                 case NETCONS:
 430                         NcStart();
 431                         break;
 432 #endif
 433 #if defined(CONFIG_CMD_SNTP)
 434                 case SNTP:
 435                         SntpStart();
 436                         break;
 437 #endif
 438 #if defined(CONFIG_CMD_DNS)
 439                 case DNS:
 440                         DnsStart();
 441                         break;
 442 #endif
 443                 default:
 444                         break;
 445                 }
 446
 447                 NetBootFileXferSize = 0;
 448                 break;
 449         }
 450
 451 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 452 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
 453         /*
 454          * Echo the inverted link state to the fault LED.
 455          */
 456         if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
 457                 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
 458         } else {
 459                 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
 460         }
 461 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
 462 #endif /* CONFIG_MII, ... */
 463
 464         /*
 465          *      Main packet reception loop.  Loop receiving packets until
 466          *      someone sets `NetState' to a state that terminates.
 467          */
 468         for (;;) {
 469                 WATCHDOG_RESET();
 470 #ifdef CONFIG_SHOW_ACTIVITY
 471                 {
 472                         extern void show_activity(int arg);
 473                         show_activity(1);
 474                 }
 475 #endif
 476                 /*
 477                  *      Check the ethernet for a new packet.  The ethernet
 478                  *      receive routine will process it.
 479                  */
 480                 eth_rx();
 481
 482                 /*
 483                  *      Abort if ctrl-c was pressed.
 484                  */
 485                 if (ctrlc()) {
 486                         eth_halt();
 487                         puts ("\nAbort\n");
 488                         return (-1);
 489                 }
 490
 491                 ArpTimeoutCheck();
 492
 493                 /*
 494                  *      Check for a timeout, and run the timeout handler
 495                  *      if we have one.
 496                  */
 497                 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
 498                         thand_f *x;
 499
 500 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 501 #  if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
 502       defined(CONFIG_STATUS_LED) &&        \
 503       defined(STATUS_LED_RED)
 504                         /*
 505                          * Echo the inverted link state to the fault LED.
 506                          */
 507                         if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
 508                                 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
 509                         } else {
 510                                 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
 511                         }
 512 #  endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
 513 #endif /* CONFIG_MII, ... */
 514                         x = timeHandler;
 515                         timeHandler = (thand_f *)0;
 516                         (*x)();
 517                 }
 518
 519
 520                 switch (NetState) {
 521
 522                 case NETLOOP_RESTART:
 523 #ifdef CONFIG_NET_MULTI
 524                         NetRestarted = 1;
 525 #endif
 526                         goto restart;
 527
 528                 case NETLOOP_SUCCESS:
 529                         if (NetBootFileXferSize > 0) {
 530                                 char buf[20];
 531                                 printf("Bytes transferred = %ld (%lx hex)\n",
 532                                         NetBootFileXferSize,
 533                                         NetBootFileXferSize);
 534                                 sprintf(buf, "%lX", NetBootFileXferSize);
 535                                 setenv("filesize", buf);
 536
 537                                 sprintf(buf, "%lX", (unsigned long)load_addr);
 538                                 setenv("fileaddr", buf);
 539                         }
 540                         eth_halt();
 541                         return NetBootFileXferSize;
 542
 543                 case NETLOOP_FAIL:
 544                         return (-1);
 545                 }
 546         }
 547 }
 548
 549 /**********************************************************************/
 550
 551 static void
 552 startAgainTimeout(void)
 553 {
 554         NetState = NETLOOP_RESTART;
 555 }
 556
 557 static void
 558 startAgainHandler(uchar *pkt, unsigned dest, IPaddr_t sip,
 559                   unsigned src, unsigned len)
 560 {
 561         /* Totally ignore the packet */
 562 }
 563
 564 void NetStartAgain (void)
 565 {
 566         char *nretry;
 567         int retry_forever = 0;
 568         unsigned long retrycnt = 0;
 569
 570         nretry = getenv("netretry");
 571         if (nretry) {
 572                 if (!strcmp(nretry, "yes"))
 573                         retry_forever = 1;
 574                 else if (!strcmp(nretry, "no"))
 575                         retrycnt = 0;
 576                 else if (!strcmp(nretry, "once"))
 577                         retrycnt = 1;
 578                 else
 579                         retrycnt = simple_strtoul(nretry, NULL, 0);
 580         } else
 581                 retry_forever = 1;
 582
 583         if ((!retry_forever) && (NetTryCount >= retrycnt)) {
 584                 eth_halt();
 585                 NetState = NETLOOP_FAIL;
 586                 return;
 587         }
 588
 589         NetTryCount++;
 590
 591 #ifndef CONFIG_NET_MULTI
 592         NetSetTimeout (10000UL, startAgainTimeout);
 593         NetSetHandler (startAgainHandler);
 594 #else   /* !CONFIG_NET_MULTI*/
 595         eth_halt ();
 596 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
 597         eth_try_another (!NetRestarted);
 598 #endif
 599         eth_init (gd->bd);
 600         if (NetRestartWrap) {
 601                 NetRestartWrap = 0;
 602                 if (NetDevExists) {
 603                         NetSetTimeout (10000UL, startAgainTimeout);
 604                         NetSetHandler (startAgainHandler);
 605                 } else {
 606                         NetState = NETLOOP_FAIL;
 607                 }
 608         } else {
 609                 NetState = NETLOOP_RESTART;
 610         }
 611 #endif  /* CONFIG_NET_MULTI */
 612 }
 613
 614 /**********************************************************************/
 615 /*
 616  *      Miscelaneous bits.
 617  */
 618
 619 void
 620 NetSetHandler(rxhand_f * f)
 621 {
 622         packetHandler = f;
 623 }
 624
 625
 626 void
 627 NetSetTimeout(ulong iv, thand_f * f)
 628 {
 629         if (iv == 0) {
 630                 timeHandler = (thand_f *)0;
 631         } else {
 632                 timeHandler = f;
 633                 timeStart = get_timer(0);
 634                 timeDelta = iv;
 635         }
 636 }
 637
 638
 639 void
 640 NetSendPacket(volatile uchar * pkt, int len)
 641 {
 642         (void) eth_send(pkt, len);
 643 }
 644
 645 int
 646 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
 647 {
 648         uchar *pkt;
 649
 650         /* convert to new style broadcast */
 651         if (dest == 0)
 652                 dest = 0xFFFFFFFF;
 653
 654         /* if broadcast, make the ether address a broadcast and don't do ARP */
 655         if (dest == 0xFFFFFFFF)
 656                 ether = NetBcastAddr;
 657
 658         /* if MAC address was not discovered yet, save the packet and do an ARP request */
 659         if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
 660
 661                 debug("sending ARP for %08lx\n", dest);
 662
 663                 NetArpWaitPacketIP = dest;
 664                 NetArpWaitPacketMAC = ether;
 665
 666                 pkt = NetArpWaitTxPacket;
 667                 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
 668
 669                 NetSetIP (pkt, dest, dport, sport, len);
 670                 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
 671
 672                 /* size of the waiting packet */
 673                 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
 674
 675                 /* and do the ARP request */
 676                 NetArpWaitTry = 1;
 677                 NetArpWaitTimerStart = get_timer(0);
 678                 ArpRequest();
 679                 return 1;       /* waiting */
 680         }
 681
 682         debug("sending UDP to %08lx/%pM\n", dest, ether);
 683
 684         pkt = (uchar *)NetTxPacket;
 685         pkt += NetSetEther (pkt, ether, PROT_IP);
 686         NetSetIP (pkt, dest, dport, sport, len);
 687         (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
 688
 689         return 0;       /* transmitted */
 690 }
 691
 692 #if defined(CONFIG_CMD_PING)
 693 static ushort PingSeqNo;
 694
 695 int PingSend(void)
 696 {
 697         static uchar mac[6];
 698         volatile IP_t *ip;
 699         volatile ushort *s;
 700         uchar *pkt;
 701
 702         /* XXX always send arp request */
 703
 704         memcpy(mac, NetEtherNullAddr, 6);
 705
 706         debug("sending ARP for %08lx\n", NetPingIP);
 707
 708         NetArpWaitPacketIP = NetPingIP;
 709         NetArpWaitPacketMAC = mac;
 710
 711         pkt = NetArpWaitTxPacket;
 712         pkt += NetSetEther(pkt, mac, PROT_IP);
 713
 714         ip = (volatile IP_t *)pkt;
 715
 716         /*
 717          *      Construct an IP and ICMP header.  (need to set no fragment bit - XXX)
 718          */
 719         ip->ip_hl_v  = 0x45;            /* IP_HDR_SIZE / 4 (not including UDP) */
 720         ip->ip_tos   = 0;
 721         ip->ip_len   = htons(IP_HDR_SIZE_NO_UDP + 8);
 722         ip->ip_id    = htons(NetIPID++);
 723         ip->ip_off   = htons(IP_FLAGS_DFRAG);   /* Don't fragment */
 724         ip->ip_ttl   = 255;
 725         ip->ip_p     = 0x01;            /* ICMP */
 726         ip->ip_sum   = 0;
 727         NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
 728         NetCopyIP((void*)&ip->ip_dst, &NetPingIP);         /* - "" - */
 729         ip->ip_sum   = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
 730
 731         s = &ip->udp_src;               /* XXX ICMP starts here */
 732         s[0] = htons(0x0800);           /* echo-request, code */
 733         s[1] = 0;                       /* checksum */
 734         s[2] = 0;                       /* identifier */
 735         s[3] = htons(PingSeqNo++);      /* sequence number */
 736         s[1] = ~NetCksum((uchar *)s, 8/2);
 737
 738         /* size of the waiting packet */
 739         NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
 740
 741         /* and do the ARP request */
 742         NetArpWaitTry = 1;
 743         NetArpWaitTimerStart = get_timer(0);
 744         ArpRequest();
 745         return 1;       /* waiting */
 746 }
 747
 748 static void
 749 PingTimeout (void)
 750 {
 751         eth_halt();
 752         NetState = NETLOOP_FAIL;        /* we did not get the reply */
 753 }
 754
 755 static void
 756 PingHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
 757             unsigned len)
 758 {
 759         if (sip != 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, IPaddr_t sip, unsigned src,
 992                 unsigned len)
 993 {
 994         /* nothing */
 995 }
 996
 997 static void
 998 CDPHandler(const uchar * pkt, unsigned len)
 999 {
1000         const uchar *t;
1001         const ushort *ss;
1002         ushort type, tlen;
1003         uchar applid;
1004         ushort vlan, nvlan;
1005
1006         /* minimum size? */
1007         if (len < sizeof(CDP_SNAP_hdr) + 4)
1008                 goto pkt_short;
1009
1010         /* check for valid CDP SNAP header */
1011         if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1012                 return;
1013
1014         pkt += sizeof(CDP_SNAP_hdr);
1015         len -= sizeof(CDP_SNAP_hdr);
1016
1017         /* Version of CDP protocol must be >= 2 and TTL != 0 */
1018         if (pkt[0] < 0x02 || pkt[1] == 0)
1019                 return;
1020
1021         /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1022         if (pkt[0] != 0x02)
1023                 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1024                                 pkt[0] & 0xff);
1025
1026         if (CDP_compute_csum(pkt, len) != 0)
1027                 return;
1028
1029         pkt += 4;
1030         len -= 4;
1031
1032         vlan = htons(-1);
1033         nvlan = htons(-1);
1034         while (len > 0) {
1035                 if (len < 4)
1036                         goto pkt_short;
1037
1038                 ss = (const ushort *)pkt;
1039                 type = ntohs(ss[0]);
1040                 tlen = ntohs(ss[1]);
1041                 if (tlen > len) {
1042                         goto pkt_short;
1043                 }
1044
1045                 pkt += tlen;
1046                 len -= tlen;
1047
1048                 ss += 2;        /* point ss to the data of the TLV */
1049                 tlen -= 4;
1050
1051                 switch (type) {
1052                         case CDP_DEVICE_ID_TLV:
1053                                 break;
1054                         case CDP_ADDRESS_TLV:
1055                                 break;
1056                         case CDP_PORT_ID_TLV:
1057                                 break;
1058                         case CDP_CAPABILITIES_TLV:
1059                                 break;
1060                         case CDP_VERSION_TLV:
1061                                 break;
1062                         case CDP_PLATFORM_TLV:
1063                                 break;
1064                         case CDP_NATIVE_VLAN_TLV:
1065                                 nvlan = *ss;
1066                                 break;
1067                         case CDP_APPLIANCE_VLAN_TLV:
1068                                 t = (const uchar *)ss;
1069                                 while (tlen > 0) {
1070                                         if (tlen < 3)
1071                                                 goto pkt_short;
1072
1073                                         applid = t[0];
1074                                         ss = (const ushort *)(t + 1);
1075
1076 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1077                                         if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1078                                                 vlan = *ss;
1079 #else
1080                                         vlan = ntohs(*ss);      /* XXX will this work; dunno */
1081 #endif
1082                                         t += 3; tlen -= 3;
1083                                 }
1084                                 break;
1085                         case CDP_TRIGGER_TLV:
1086                                 break;
1087                         case CDP_POWER_CONSUMPTION_TLV:
1088                                 break;
1089                         case CDP_SYSNAME_TLV:
1090                                 break;
1091                         case CDP_SYSOBJECT_TLV:
1092                                 break;
1093                         case CDP_MANAGEMENT_ADDRESS_TLV:
1094                                 break;
1095                 }
1096         }
1097
1098         CDPApplianceVLAN = vlan;
1099         CDPNativeVLAN = nvlan;
1100
1101         CDPOK = 1;
1102         return;
1103
1104  pkt_short:
1105         printf("** CDP packet is too short\n");
1106         return;
1107 }
1108
1109 static void CDPStart(void)
1110 {
1111 #if defined(CONFIG_NET_MULTI)
1112         printf ("Using %s device\n", eth_get_name());
1113 #endif
1114         CDPSeq = 0;
1115         CDPOK = 0;
1116
1117         CDPNativeVLAN = htons(-1);
1118         CDPApplianceVLAN = htons(-1);
1119
1120         NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1121         NetSetHandler (CDPDummyHandler);
1122
1123         CDPSendTrigger();
1124 }
1125 #endif
1126
1127 #ifdef CONFIG_IP_DEFRAG
1128 /*
1129  * This function collects fragments in a single packet, according
1130  * to the algorithm in RFC815. It returns NULL or the pointer to
1131  * a complete packet, in static storage
1132  */
1133 #ifndef CONFIG_NET_MAXDEFRAG
1134 #define CONFIG_NET_MAXDEFRAG 16384
1135 #endif
1136 /*
1137  * MAXDEFRAG, above, is chosen in the config file and  is real data
1138  * so we need to add the NFS overhead, which is more than TFTP.
1139  * To use sizeof in the internal unnamed structures, we need a real
1140  * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
1141  * The compiler doesn't complain nor allocates the actual structure
1142  */
1143 static struct rpc_t rpc_specimen;
1144 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
1145
1146 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
1147
1148 /*
1149  * this is the packet being assembled, either data or frag control.
1150  * Fragments go by 8 bytes, so this union must be 8 bytes long
1151  */
1152 struct hole {
1153         /* first_byte is address of this structure */
1154         u16 last_byte;  /* last byte in this hole + 1 (begin of next hole) */
1155         u16 next_hole;  /* index of next (in 8-b blocks), 0 == none */
1156         u16 prev_hole;  /* index of prev, 0 == none */
1157         u16 unused;
1158 };
1159
1160 static IP_t *__NetDefragment(IP_t *ip, int *lenp)
1161 {
1162         static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN)));
1163         static u16 first_hole, total_len;
1164         struct hole *payload, *thisfrag, *h, *newh;
1165         IP_t *localip = (IP_t *)pkt_buff;
1166         uchar *indata = (uchar *)ip;
1167         int offset8, start, len, done = 0;
1168         u16 ip_off = ntohs(ip->ip_off);
1169
1170         /* payload starts after IP header, this fragment is in there */
1171         payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
1172         offset8 =  (ip_off & IP_OFFS);
1173         thisfrag = payload + offset8;
1174         start = offset8 * 8;
1175         len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
1176
1177         if (start + len > IP_MAXUDP) /* fragment extends too far */
1178                 return NULL;
1179
1180         if (!total_len || localip->ip_id != ip->ip_id) {
1181                 /* new (or different) packet, reset structs */
1182                 total_len = 0xffff;
1183                 payload[0].last_byte = ~0;
1184                 payload[0].next_hole = 0;
1185                 payload[0].prev_hole = 0;
1186                 first_hole = 0;
1187                 /* any IP header will work, copy the first we received */
1188                 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
1189         }
1190
1191         /*
1192          * What follows is the reassembly algorithm. We use the payload
1193          * array as a linked list of hole descriptors, as each hole starts
1194          * at a multiple of 8 bytes. However, last byte can be whatever value,
1195          * so it is represented as byte count, not as 8-byte blocks.
1196          */
1197
1198         h = payload + first_hole;
1199         while (h->last_byte < start) {
1200                 if (!h->next_hole) {
1201                         /* no hole that far away */
1202                         return NULL;
1203                 }
1204                 h = payload + h->next_hole;
1205         }
1206
1207         /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
1208         if (offset8 + ((len + 7) / 8) <= h - payload) {
1209                 /* no overlap with holes (dup fragment?) */
1210                 return NULL;
1211         }
1212
1213         if (!(ip_off & IP_FLAGS_MFRAG)) {
1214                 /* no more fragmentss: truncate this (last) hole */
1215                 total_len = start + len;
1216                 h->last_byte = start + len;
1217         }
1218
1219         /*
1220          * There is some overlap: fix the hole list. This code doesn't
1221          * deal with a fragment that overlaps with two different holes
1222          * (thus being a superset of a previously-received fragment).
1223          */
1224
1225         if ( (h >= thisfrag) && (h->last_byte <= start + len) ) {
1226                 /* complete overlap with hole: remove hole */
1227                 if (!h->prev_hole && !h->next_hole) {
1228                         /* last remaining hole */
1229                         done = 1;
1230                 } else if (!h->prev_hole) {
1231                         /* first hole */
1232                         first_hole = h->next_hole;
1233                         payload[h->next_hole].prev_hole = 0;
1234                 } else if (!h->next_hole) {
1235                         /* last hole */
1236                         payload[h->prev_hole].next_hole = 0;
1237                 } else {
1238                         /* in the middle of the list */
1239                         payload[h->next_hole].prev_hole = h->prev_hole;
1240                         payload[h->prev_hole].next_hole = h->next_hole;
1241                 }
1242
1243         } else if (h->last_byte <= start + len) {
1244                 /* overlaps with final part of the hole: shorten this hole */
1245                 h->last_byte = start;
1246
1247         } else if (h >= thisfrag) {
1248                 /* overlaps with initial part of the hole: move this hole */
1249                 newh = thisfrag + (len / 8);
1250                 *newh = *h;
1251                 h = newh;
1252                 if (h->next_hole)
1253                         payload[h->next_hole].prev_hole = (h - payload);
1254                 if (h->prev_hole)
1255                         payload[h->prev_hole].next_hole = (h - payload);
1256                 else
1257                         first_hole = (h - payload);
1258
1259         } else {
1260                 /* fragment sits in the middle: split the hole */
1261                 newh = thisfrag + (len / 8);
1262                 *newh = *h;
1263                 h->last_byte = start;
1264                 h->next_hole = (newh - payload);
1265                 newh->prev_hole = (h - payload);
1266                 if (newh->next_hole)
1267                         payload[newh->next_hole].prev_hole = (newh - payload);
1268         }
1269
1270         /* finally copy this fragment and possibly return whole packet */
1271         memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
1272         if (!done)
1273                 return NULL;
1274
1275         localip->ip_len = htons(total_len);
1276         *lenp = total_len + IP_HDR_SIZE_NO_UDP;
1277         return localip;
1278 }
1279
1280 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1281 {
1282         u16 ip_off = ntohs(ip->ip_off);
1283         if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1284                 return ip; /* not a fragment */
1285         return __NetDefragment(ip, lenp);
1286 }
1287
1288 #else /* !CONFIG_IP_DEFRAG */
1289
1290 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1291 {
1292         u16 ip_off = ntohs(ip->ip_off);
1293         if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1294                 return ip; /* not a fragment */
1295         return NULL;
1296 }
1297 #endif
1298
1299 void
1300 NetReceive(volatile uchar * inpkt, int len)
1301 {
1302         Ethernet_t *et;
1303         IP_t    *ip;
1304         ARP_t   *arp;
1305         IPaddr_t tmp;
1306         IPaddr_t src_ip;
1307         int     x;
1308         uchar *pkt;
1309 #if defined(CONFIG_CMD_CDP)
1310         int iscdp;
1311 #endif
1312         ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1313
1314         debug("packet received\n");
1315
1316         NetRxPacket = inpkt;
1317         NetRxPacketLen = len;
1318         et = (Ethernet_t *)inpkt;
1319
1320         /* too small packet? */
1321         if (len < ETHER_HDR_SIZE)
1322                 return;
1323
1324 #ifdef CONFIG_API
1325         if (push_packet) {
1326                 (*push_packet)(inpkt, len);
1327                 return;
1328         }
1329 #endif
1330
1331 #if defined(CONFIG_CMD_CDP)
1332         /* keep track if packet is CDP */
1333         iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1334 #endif
1335
1336         myvlanid = ntohs(NetOurVLAN);
1337         if (myvlanid == (ushort)-1)
1338                 myvlanid = VLAN_NONE;
1339         mynvlanid = ntohs(NetOurNativeVLAN);
1340         if (mynvlanid == (ushort)-1)
1341                 mynvlanid = VLAN_NONE;
1342
1343         x = ntohs(et->et_protlen);
1344
1345         debug("packet received\n");
1346
1347         if (x < 1514) {
1348                 /*
1349                  *      Got a 802 packet.  Check the other protocol field.
1350                  */
1351                 x = ntohs(et->et_prot);
1352
1353                 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1354                 len -= E802_HDR_SIZE;
1355
1356         } else if (x != PROT_VLAN) {    /* normal packet */
1357                 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1358                 len -= ETHER_HDR_SIZE;
1359
1360         } else {                        /* VLAN packet */
1361                 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1362
1363                 debug("VLAN packet received\n");
1364
1365                 /* too small packet? */
1366                 if (len < VLAN_ETHER_HDR_SIZE)
1367                         return;
1368
1369                 /* if no VLAN active */
1370                 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1371 #if defined(CONFIG_CMD_CDP)
1372                                 && iscdp == 0
1373 #endif
1374                                 )
1375                         return;
1376
1377                 cti = ntohs(vet->vet_tag);
1378                 vlanid = cti & VLAN_IDMASK;
1379                 x = ntohs(vet->vet_type);
1380
1381                 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1382                 len -= VLAN_ETHER_HDR_SIZE;
1383         }
1384
1385         debug("Receive from protocol 0x%x\n", x);
1386
1387 #if defined(CONFIG_CMD_CDP)
1388         if (iscdp) {
1389                 CDPHandler((uchar *)ip, len);
1390                 return;
1391         }
1392 #endif
1393
1394         if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1395                 if (vlanid == VLAN_NONE)
1396                         vlanid = (mynvlanid & VLAN_IDMASK);
1397                 /* not matched? */
1398                 if (vlanid != (myvlanid & VLAN_IDMASK))
1399                         return;
1400         }
1401
1402         switch (x) {
1403
1404         case PROT_ARP:
1405                 /*
1406                  * We have to deal with two types of ARP packets:
1407                  * - REQUEST packets will be answered by sending  our
1408                  *   IP address - if we know it.
1409                  * - REPLY packates are expected only after we asked
1410                  *   for the TFTP server's or the gateway's ethernet
1411                  *   address; so if we receive such a packet, we set
1412                  *   the server ethernet address
1413                  */
1414                 debug("Got ARP\n");
1415
1416                 arp = (ARP_t *)ip;
1417                 if (len < ARP_HDR_SIZE) {
1418                         printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1419                         return;
1420                 }
1421                 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1422                         return;
1423                 }
1424                 if (ntohs(arp->ar_pro) != PROT_IP) {
1425                         return;
1426                 }
1427                 if (arp->ar_hln != 6) {
1428                         return;
1429                 }
1430                 if (arp->ar_pln != 4) {
1431                         return;
1432                 }
1433
1434                 if (NetOurIP == 0) {
1435                         return;
1436                 }
1437
1438                 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1439                         return;
1440                 }
1441
1442                 switch (ntohs(arp->ar_op)) {
1443                 case ARPOP_REQUEST:             /* reply with our IP address    */
1444                         debug("Got ARP REQUEST, return our IP\n");
1445                         pkt = (uchar *)et;
1446                         pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1447                         arp->ar_op = htons(ARPOP_REPLY);
1448                         memcpy   (&arp->ar_data[10], &arp->ar_data[0], 6);
1449                         NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1450                         memcpy   (&arp->ar_data[ 0], NetOurEther, 6);
1451                         NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1452                         (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1453                         return;
1454
1455                 case ARPOP_REPLY:               /* arp reply */
1456                         /* are we waiting for a reply */
1457                         if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1458                                 break;
1459
1460 #ifdef CONFIG_KEEP_SERVERADDR
1461                         if (NetServerIP == NetArpWaitPacketIP) {
1462                                 char buf[20];
1463                                 sprintf(buf, "%pM", arp->ar_data);
1464                                 setenv("serveraddr", buf);
1465                         }
1466 #endif
1467
1468                         debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1469                                 arp->ar_data);
1470
1471                         tmp = NetReadIP(&arp->ar_data[6]);
1472
1473                         /* matched waiting packet's address */
1474                         if (tmp == NetArpWaitReplyIP) {
1475                                 debug("Got it\n");
1476                                 /* save address for later use */
1477                                 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1478
1479 #ifdef CONFIG_NETCONSOLE
1480                                 (*packetHandler)(0, 0, 0, 0, 0);
1481 #endif
1482                                 /* modify header, and transmit it */
1483                                 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1484                                 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1485
1486                                 /* no arp request pending now */
1487                                 NetArpWaitPacketIP = 0;
1488                                 NetArpWaitTxPacketSize = 0;
1489                                 NetArpWaitPacketMAC = NULL;
1490
1491                         }
1492                         return;
1493                 default:
1494                         debug("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1495                         return;
1496                 }
1497                 break;
1498
1499 #ifdef CONFIG_CMD_RARP
1500         case PROT_RARP:
1501                 debug("Got RARP\n");
1502                 arp = (ARP_t *)ip;
1503                 if (len < ARP_HDR_SIZE) {
1504                         printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1505                         return;
1506                 }
1507
1508                 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1509                         (ntohs(arp->ar_hrd) != ARP_ETHER)   ||
1510                         (ntohs(arp->ar_pro) != PROT_IP)     ||
1511                         (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1512
1513                         puts ("invalid RARP header\n");
1514                 } else {
1515                         NetCopyIP(&NetOurIP,    &arp->ar_data[16]);
1516                         if (NetServerIP == 0)
1517                                 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1518                         memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1519
1520                         (*packetHandler)(0, 0, 0, 0, 0);
1521                 }
1522                 break;
1523 #endif
1524         case PROT_IP:
1525                 debug("Got IP\n");
1526                 /* Before we start poking the header, make sure it is there */
1527                 if (len < IP_HDR_SIZE) {
1528                         debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1529                         return;
1530                 }
1531                 /* Check the packet length */
1532                 if (len < ntohs(ip->ip_len)) {
1533                         printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1534                         return;
1535                 }
1536                 len = ntohs(ip->ip_len);
1537                 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1538
1539                 /* Can't deal with anything except IPv4 */
1540                 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1541                         return;
1542                 }
1543                 /* Can't deal with IP options (headers != 20 bytes) */
1544                 if ((ip->ip_hl_v & 0x0f) > 0x05) {
1545                         return;
1546                 }
1547                 /* Check the Checksum of the header */
1548                 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1549                         puts ("checksum bad\n");
1550                         return;
1551                 }
1552                 /* If it is not for us, ignore it */
1553                 tmp = NetReadIP(&ip->ip_dst);
1554                 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1555 #ifdef CONFIG_MCAST_TFTP
1556                         if (Mcast_addr != tmp)
1557 #endif
1558                         return;
1559                 }
1560                 /* Read source IP address for later use */
1561                 src_ip = NetReadIP(&ip->ip_src);
1562                 /*
1563                  * The function returns the unchanged packet if it's not
1564                  * a fragment, and either the complete packet or NULL if
1565                  * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1566                  */
1567                 if (!(ip = NetDefragment(ip, &len)))
1568                         return;
1569                 /*
1570                  * watch for ICMP host redirects
1571                  *
1572                  * There is no real handler code (yet). We just watch
1573                  * for ICMP host redirect messages. In case anybody
1574                  * sees these messages: please contact me
1575                  * (wd@denx.de), or - even better - send me the
1576                  * necessary fixes :-)
1577                  *
1578                  * Note: in all cases where I have seen this so far
1579                  * it was a problem with the router configuration,
1580                  * for instance when a router was configured in the
1581                  * BOOTP reply, but the TFTP server was on the same
1582                  * subnet. So this is probably a warning that your
1583                  * configuration might be wrong. But I'm not really
1584                  * sure if there aren't any other situations.
1585                  */
1586                 if (ip->ip_p == IPPROTO_ICMP) {
1587                         ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1588
1589                         switch (icmph->type) {
1590                         case ICMP_REDIRECT:
1591                                 if (icmph->code != ICMP_REDIR_HOST)
1592                                         return;
1593                                 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway);
1594                                 return;
1595 #if defined(CONFIG_CMD_PING)
1596                         case ICMP_ECHO_REPLY:
1597                                 /*
1598                                  *      IP header OK.  Pass the packet to the current handler.
1599                                  */
1600                                 /* XXX point to ip packet */
1601                                 (*packetHandler)((uchar *)ip, 0, src_ip, 0, 0);
1602                                 return;
1603                         case ICMP_ECHO_REQUEST:
1604                                 debug("Got ICMP ECHO REQUEST, "
1605                                       "return %d bytes\n",
1606                                       ETHER_HDR_SIZE + len);
1607
1608                                 memcpy (&et->et_dest[0], &et->et_src[0], 6);
1609                                 memcpy (&et->et_src[ 0], NetOurEther, 6);
1610
1611                                 ip->ip_sum = 0;
1612                                 ip->ip_off = 0;
1613                                 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1614                                 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1615                                 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
1616
1617                                 icmph->type = ICMP_ECHO_REPLY;
1618                                 icmph->checksum = 0;
1619                                 icmph->checksum = ~NetCksum((uchar *)icmph,
1620                                                 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1621                                 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
1622                                 return;
1623 #endif
1624                         default:
1625                                 return;
1626                         }
1627                 } else if (ip->ip_p != IPPROTO_UDP) {   /* Only UDP packets */
1628                         return;
1629                 }
1630
1631 #ifdef CONFIG_UDP_CHECKSUM
1632                 if (ip->udp_xsum != 0) {
1633                         ulong   xsum;
1634                         ushort *sumptr;
1635                         ushort  sumlen;
1636
1637                         xsum  = ip->ip_p;
1638                         xsum += (ntohs(ip->udp_len));
1639                         xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1640                         xsum += (ntohl(ip->ip_src) >>  0) & 0x0000ffff;
1641                         xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1642                         xsum += (ntohl(ip->ip_dst) >>  0) & 0x0000ffff;
1643
1644                         sumlen = ntohs(ip->udp_len);
1645                         sumptr = (ushort *) &(ip->udp_src);
1646
1647                         while (sumlen > 1) {
1648                                 ushort sumdata;
1649
1650                                 sumdata = *sumptr++;
1651                                 xsum += ntohs(sumdata);
1652                                 sumlen -= 2;
1653                         }
1654                         if (sumlen > 0) {
1655                                 ushort sumdata;
1656
1657                                 sumdata = *(unsigned char *) sumptr;
1658                                 sumdata = (sumdata << 8) & 0xff00;
1659                                 xsum += sumdata;
1660                         }
1661                         while ((xsum >> 16) != 0) {
1662                                 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1663                         }
1664                         if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1665                                 printf(" UDP wrong checksum %08lx %08x\n",
1666                                         xsum, ntohs(ip->udp_xsum));
1667                                 return;
1668                         }
1669                 }
1670 #endif
1671
1672
1673 #ifdef CONFIG_NETCONSOLE
1674                 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1675                                                 ntohs(ip->udp_dst),
1676                                                 ntohs(ip->udp_src),
1677                                                 ntohs(ip->udp_len) - 8);
1678 #endif
1679                 /*
1680                  *      IP header OK.  Pass the packet to the current handler.
1681                  */
1682                 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1683                                                 ntohs(ip->udp_dst),
1684                                                 src_ip,
1685                                                 ntohs(ip->udp_src),
1686                                                 ntohs(ip->udp_len) - 8);
1687                 break;
1688         }
1689 }
1690
1691
1692 /**********************************************************************/
1693
1694 static int net_check_prereq (proto_t protocol)
1695 {
1696         switch (protocol) {
1697                 /* Fall through */
1698 #if defined(CONFIG_CMD_PING)
1699         case PING:
1700                 if (NetPingIP == 0) {
1701                         puts ("*** ERROR: ping address not given\n");
1702                         return (1);
1703                 }
1704                 goto common;
1705 #endif
1706 #if defined(CONFIG_CMD_SNTP)
1707         case SNTP:
1708                 if (NetNtpServerIP == 0) {
1709                         puts ("*** ERROR: NTP server address not given\n");
1710                         return (1);
1711                 }
1712                 goto common;
1713 #endif
1714 #if defined(CONFIG_CMD_DNS)
1715         case DNS:
1716                 if (NetOurDNSIP == 0) {
1717                         puts("*** ERROR: DNS server address not given\n");
1718                         return 1;
1719                 }
1720                 goto common;
1721 #endif
1722 #if defined(CONFIG_CMD_NFS)
1723         case NFS:
1724 #endif
1725         case TFTP:
1726                 if (NetServerIP == 0) {
1727                         puts ("*** ERROR: `serverip' not set\n");
1728                         return (1);
1729                 }
1730 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1731     defined(CONFIG_CMD_DNS)
1732     common:
1733 #endif
1734                 /* Fall through */
1735
1736         case NETCONS:
1737                 if (NetOurIP == 0) {
1738                         puts ("*** ERROR: `ipaddr' not set\n");
1739                         return (1);
1740                 }
1741                 /* Fall through */
1742
1743 #ifdef CONFIG_CMD_RARP
1744         case RARP:
1745 #endif
1746         case BOOTP:
1747         case CDP:
1748         case DHCP:
1749                 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1750 #ifdef CONFIG_NET_MULTI
1751                         extern int eth_get_dev_index (void);
1752                         int num = eth_get_dev_index ();
1753
1754                         switch (num) {
1755                         case -1:
1756                                 puts ("*** ERROR: No ethernet found.\n");
1757                                 return (1);
1758                         case 0:
1759                                 puts ("*** ERROR: `ethaddr' not set\n");
1760                                 break;
1761                         default:
1762                                 printf ("*** ERROR: `eth%daddr' not set\n",
1763                                         num);
1764                                 break;
1765                         }
1766
1767                         NetStartAgain ();
1768                         return (2);
1769 #else
1770                         puts ("*** ERROR: `ethaddr' not set\n");
1771                         return (1);
1772 #endif
1773                 }
1774                 /* Fall through */
1775         default:
1776                 return (0);
1777         }
1778         return (0);             /* OK */
1779 }
1780 /**********************************************************************/
1781
1782 int
1783 NetCksumOk(uchar * ptr, int len)
1784 {
1785         return !((NetCksum(ptr, len) + 1) & 0xfffe);
1786 }
1787
1788
1789 unsigned
1790 NetCksum(uchar * ptr, int len)
1791 {
1792         ulong   xsum;
1793         ushort *p = (ushort *)ptr;
1794
1795         xsum = 0;
1796         while (len-- > 0)
1797                 xsum += *p++;
1798         xsum = (xsum & 0xffff) + (xsum >> 16);
1799         xsum = (xsum & 0xffff) + (xsum >> 16);
1800         return (xsum & 0xffff);
1801 }
1802
1803 int
1804 NetEthHdrSize(void)
1805 {
1806         ushort myvlanid;
1807
1808         myvlanid = ntohs(NetOurVLAN);
1809         if (myvlanid == (ushort)-1)
1810                 myvlanid = VLAN_NONE;
1811
1812         return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
1813 }
1814
1815 int
1816 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1817 {
1818         Ethernet_t *et = (Ethernet_t *)xet;
1819         ushort myvlanid;
1820
1821         myvlanid = ntohs(NetOurVLAN);
1822         if (myvlanid == (ushort)-1)
1823                 myvlanid = VLAN_NONE;
1824
1825         memcpy (et->et_dest, addr, 6);
1826         memcpy (et->et_src, NetOurEther, 6);
1827         if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1828         et->et_protlen = htons(prot);
1829                 return ETHER_HDR_SIZE;
1830         } else {
1831                 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1832
1833                 vet->vet_vlan_type = htons(PROT_VLAN);
1834                 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1835                 vet->vet_type = htons(prot);
1836                 return VLAN_ETHER_HDR_SIZE;
1837         }
1838 }
1839
1840 void
1841 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1842 {
1843         IP_t *ip = (IP_t *)xip;
1844
1845         /*
1846          *      If the data is an odd number of bytes, zero the
1847          *      byte after the last byte so that the checksum
1848          *      will work.
1849          */
1850         if (len & 1)
1851                 xip[IP_HDR_SIZE + len] = 0;
1852
1853         /*
1854          *      Construct an IP and UDP header.
1855          *      (need to set no fragment bit - XXX)
1856          */
1857         ip->ip_hl_v  = 0x45;            /* IP_HDR_SIZE / 4 (not including UDP) */
1858         ip->ip_tos   = 0;
1859         ip->ip_len   = htons(IP_HDR_SIZE + len);
1860         ip->ip_id    = htons(NetIPID++);
1861         ip->ip_off   = htons(IP_FLAGS_DFRAG);   /* Don't fragment */
1862         ip->ip_ttl   = 255;
1863         ip->ip_p     = 17;              /* UDP */
1864         ip->ip_sum   = 0;
1865         NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
1866         NetCopyIP((void*)&ip->ip_dst, &dest);      /* - "" - */
1867         ip->udp_src  = htons(sport);
1868         ip->udp_dst  = htons(dport);
1869         ip->udp_len  = htons(8 + len);
1870         ip->udp_xsum = 0;
1871         ip->ip_sum   = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1872 }
1873
1874 void copy_filename (char *dst, const char *src, int size)
1875 {
1876         if (*src && (*src == '"')) {
1877                 ++src;
1878                 --size;
1879         }
1880
1881         while ((--size > 0) && *src && (*src != '"')) {
1882                 *dst++ = *src++;
1883         }
1884         *dst = '\0';
1885 }
1886
1887 #if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS)
1888 /*
1889  * make port a little random (1024-17407)
1890  * This keeps the math somewhat trivial to compute, and seems to work with
1891  * all supported protocols/clients/servers
1892  */
1893 unsigned int random_port(void)
1894 {
1895         return 1024 + (get_timer(0) % 0x4000);
1896 }
1897 #endif
1898
1899 void ip_to_string (IPaddr_t x, char *s)
1900 {
1901         x = ntohl (x);
1902         sprintf (s, "%d.%d.%d.%d",
1903                  (int) ((x >> 24) & 0xff),
1904                  (int) ((x >> 16) & 0xff),
1905                  (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1906         );
1907 }
1908
1909 void VLAN_to_string(ushort x, char *s)
1910 {
1911         x = ntohs(x);
1912
1913         if (x == (ushort)-1)
1914                 x = VLAN_NONE;
1915
1916         if (x == VLAN_NONE)
1917                 strcpy(s, "none");
1918         else
1919                 sprintf(s, "%d", x & VLAN_IDMASK);
1920 }
1921
1922 ushort string_to_VLAN(const char *s)
1923 {
1924         ushort id;
1925
1926         if (s == NULL)
1927                 return htons(VLAN_NONE);
1928
1929         if (*s < '0' || *s > '9')
1930                 id = VLAN_NONE;
1931         else
1932                 id = (ushort)simple_strtoul(s, NULL, 10);
1933
1934         return htons(id);
1935 }
1936
1937 ushort getenv_VLAN(char *var)
1938 {
1939         return (string_to_VLAN(getenv(var)));
1940 }