reactos/dll/win32/dhcpcsvc/dhcp/adapter.c

   1 #include <rosdhcp.h>
   2
   3 SOCKET DhcpSocket = INVALID_SOCKET;
   4 static LIST_ENTRY AdapterList;
   5 static WSADATA wsd;
   6
   7 PCHAR *GetSubkeyNames( PCHAR MainKeyName, PCHAR Append ) {
   8     int i = 0;
   9     DWORD Error;
  10     HKEY MainKey;
  11     PCHAR *Out, OutKeyName;
  12     DWORD CharTotal = 0, AppendLen = 1 + strlen(Append);
  13     DWORD MaxSubKeyLen = 0, MaxSubKeys = 0;
  14
  15     Error = RegOpenKey( HKEY_LOCAL_MACHINE, MainKeyName, &MainKey );
  16
  17     if( Error ) return NULL;
  18
  19     Error = RegQueryInfoKey
  20         ( MainKey,
  21           NULL, NULL, NULL,
  22           &MaxSubKeys, &MaxSubKeyLen,
  23           NULL, NULL, NULL, NULL, NULL, NULL );
  24
  25     MaxSubKeyLen++;
  26     DH_DbgPrint(MID_TRACE,("MaxSubKeys: %d, MaxSubKeyLen %d\n",
  27                            MaxSubKeys, MaxSubKeyLen));
  28
  29     CharTotal = (sizeof(PCHAR) + MaxSubKeyLen + AppendLen) * (MaxSubKeys + 1);
  30
  31     DH_DbgPrint(MID_TRACE,("AppendLen: %d, CharTotal: %d\n",
  32                            AppendLen, CharTotal));
  33
  34     Out = (CHAR**) malloc( CharTotal );
  35     OutKeyName = ((PCHAR)&Out[MaxSubKeys+1]);
  36
  37     if( !Out ) { RegCloseKey( MainKey ); return NULL; }
  38
  39     i = 0;
  40     do {
  41         Out[i] = OutKeyName;
  42         Error = RegEnumKey( MainKey, i, OutKeyName, MaxSubKeyLen );
  43         if( !Error ) {
  44             strcat( OutKeyName, Append );
  45             DH_DbgPrint(MID_TRACE,("[%d]: %s\n", i, OutKeyName));
  46             OutKeyName += strlen(OutKeyName) + 1;
  47             i++;
  48         } else Out[i] = 0;
  49     } while( Error == ERROR_SUCCESS );
  50
  51     RegCloseKey( MainKey );
  52
  53     return Out;
  54 }
  55
  56 PCHAR RegReadString( HKEY Root, PCHAR Subkey, PCHAR Value ) {
  57     PCHAR SubOut = NULL;
  58     DWORD SubOutLen = 0, Error = 0;
  59     HKEY  ValueKey = NULL;
  60
  61     DH_DbgPrint(MID_TRACE,("Looking in %x:%s:%s\n", Root, Subkey, Value ));
  62
  63     if( Subkey && strlen(Subkey) ) {
  64         if( RegOpenKey( Root, Subkey, &ValueKey ) != ERROR_SUCCESS )
  65             goto regerror;
  66     } else ValueKey = Root;
  67
  68     DH_DbgPrint(MID_TRACE,("Got Key %x\n", ValueKey));
  69
  70     if( (Error = RegQueryValueEx( ValueKey, Value, NULL, NULL,
  71                                   (LPBYTE)SubOut, &SubOutLen )) != ERROR_SUCCESS )
  72         goto regerror;
  73
  74     DH_DbgPrint(MID_TRACE,("Value %s has size %d\n", Value, SubOutLen));
  75
  76     if( !(SubOut = (CHAR*) malloc(SubOutLen)) )
  77         goto regerror;
  78
  79     if( (Error = RegQueryValueEx( ValueKey, Value, NULL, NULL,
  80                                   (LPBYTE)SubOut, &SubOutLen )) != ERROR_SUCCESS )
  81         goto regerror;
  82
  83     DH_DbgPrint(MID_TRACE,("Value %s is %s\n", Value, SubOut));
  84
  85     goto cleanup;
  86
  87 regerror:
  88     if( SubOut ) { free( SubOut ); SubOut = NULL; }
  89 cleanup:
  90     if( ValueKey && ValueKey != Root ) {
  91         DH_DbgPrint(MID_TRACE,("Closing key %x\n", ValueKey));
  92         RegCloseKey( ValueKey );
  93     }
  94
  95     DH_DbgPrint(MID_TRACE,("Returning %x with error %d\n", SubOut, Error));
  96
  97     return SubOut;
  98 }
  99
 100 HKEY FindAdapterKey( PDHCP_ADAPTER Adapter ) {
 101     int i = 0;
 102     PCHAR EnumKeyName =
 103         "SYSTEM\\CurrentControlSet\\Control\\Class\\"
 104         "{4D36E972-E325-11CE-BFC1-08002BE10318}";
 105     PCHAR TargetKeyNameStart =
 106         "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\";
 107     PCHAR TargetKeyName = NULL;
 108     PCHAR *EnumKeysLinkage = GetSubkeyNames( EnumKeyName, "\\Linkage" );
 109     PCHAR *EnumKeysTop     = GetSubkeyNames( EnumKeyName, "" );
 110     PCHAR RootDevice = NULL;
 111     HKEY EnumKey, OutKey = NULL;
 112     DWORD Error = ERROR_SUCCESS;
 113
 114     if( !EnumKeysLinkage || !EnumKeysTop ) goto cleanup;
 115
 116     Error = RegOpenKey( HKEY_LOCAL_MACHINE, EnumKeyName, &EnumKey );
 117
 118     if( Error ) goto cleanup;
 119
 120     for( i = 0; EnumKeysLinkage[i]; i++ ) {
 121         RootDevice = RegReadString
 122             ( EnumKey, EnumKeysLinkage[i], "RootDevice" );
 123
 124         if( RootDevice &&
 125             !strcmp( RootDevice, Adapter->DhclientInfo.name ) ) {
 126             TargetKeyName =
 127                 (CHAR*) malloc( strlen( TargetKeyNameStart ) +
 128                         strlen( RootDevice ) + 1);
 129             if( !TargetKeyName ) goto cleanup;
 130             sprintf( TargetKeyName, "%s%s",
 131                      TargetKeyNameStart, RootDevice );
 132             Error = RegCreateKeyExA( HKEY_LOCAL_MACHINE, TargetKeyName, 0, NULL, 0, KEY_READ, NULL, &OutKey, NULL );
 133             break;
 134         } else {
 135             free( RootDevice ); RootDevice = 0;
 136         }
 137     }
 138
 139 cleanup:
 140     if( RootDevice ) free( RootDevice );
 141     if( EnumKeysLinkage ) free( EnumKeysLinkage );
 142     if( EnumKeysTop ) free( EnumKeysTop );
 143     if( TargetKeyName ) free( TargetKeyName );
 144
 145     return OutKey;
 146 }
 147
 148 BOOL PrepareAdapterForService( PDHCP_ADAPTER Adapter ) {
 149     HKEY AdapterKey;
 150     DWORD Error = ERROR_SUCCESS, DhcpEnabled, Length = sizeof(DWORD);
 151
 152     Adapter->DhclientState.config = &Adapter->DhclientConfig;
 153     strncpy(Adapter->DhclientInfo.name, (char*)Adapter->IfMib.bDescr,
 154             sizeof(Adapter->DhclientInfo.name));
 155
 156     AdapterKey = FindAdapterKey( Adapter );
 157     if( AdapterKey )
 158     {
 159         Error = RegQueryValueEx(AdapterKey, "EnableDHCP", NULL, NULL, (LPBYTE)&DhcpEnabled, &Length);
 160
 161         if (Error != ERROR_SUCCESS || Length != sizeof(DWORD))
 162             DhcpEnabled = 1;
 163
 164         CloseHandle(AdapterKey);
 165     }
 166     else
 167     {
 168         /* DHCP enabled by default */
 169         DhcpEnabled = 1;
 170     }
 171
 172     if( !DhcpEnabled ) {
 173         /* Non-automatic case */
 174         DbgPrint("DHCPCSVC: Adapter Name: [%s] (static)\n", Adapter->DhclientInfo.name);
 175
 176         Adapter->DhclientState.state = S_STATIC;
 177     } else {
 178         /* Automatic case */
 179         DbgPrint("DHCPCSVC: Adapter Name: [%s] (dynamic)\n", Adapter->DhclientInfo.name);
 180
 181         Adapter->DhclientInfo.client->state = S_INIT;
 182     }
 183
 184     return TRUE;
 185 }
 186
 187 void AdapterInit() {
 188     WSAStartup(0x0101,&wsd);
 189
 190     InitializeListHead( &AdapterList );
 191 }
 192
 193 int
 194 InterfaceConnected(const MIB_IFROW* IfEntry)
 195 {
 196     if (IfEntry->dwOperStatus == IF_OPER_STATUS_CONNECTED ||
 197         IfEntry->dwOperStatus == IF_OPER_STATUS_OPERATIONAL)
 198         return 1;
 199
 200     DH_DbgPrint(MID_TRACE,("Interface %d is down\n", IfEntry->dwIndex));
 201     return 0;
 202 }
 203
 204 BOOL
 205 IsReconnectHackNeeded(PDHCP_ADAPTER Adapter, const MIB_IFROW* IfEntry)
 206 {
 207     struct protocol *proto;
 208     PIP_ADAPTER_INFO AdapterInfo, Orig;
 209     DWORD Size, Ret;
 210     char *ZeroAddress = "0.0.0.0";
 211
 212     proto = find_protocol_by_adapter(&Adapter->DhclientInfo);
 213
 214     if (Adapter->DhclientInfo.client->state == S_BOUND && !proto)
 215         return FALSE;
 216
 217     if (Adapter->DhclientInfo.client->state != S_BOUND &&
 218         Adapter->DhclientInfo.client->state != S_STATIC)
 219         return FALSE;
 220
 221     ApiUnlock();
 222
 223     Orig = AdapterInfo = HeapAlloc(GetProcessHeap(), 0, sizeof(IP_ADAPTER_INFO));
 224     Size = sizeof(IP_ADAPTER_INFO);
 225     if (!AdapterInfo)
 226     {
 227         ApiLock();
 228         return FALSE;
 229     }
 230
 231     Ret = GetAdaptersInfo(AdapterInfo, &Size);
 232     if (Ret == ERROR_BUFFER_OVERFLOW)
 233     {
 234         HeapFree(GetProcessHeap(), 0, AdapterInfo);
 235         AdapterInfo = HeapAlloc(GetProcessHeap(), 0, Size);
 236         if (!AdapterInfo)
 237         {
 238             ApiLock();
 239             return FALSE;
 240         }
 241
 242         if (GetAdaptersInfo(AdapterInfo, &Size) != NO_ERROR)
 243         {
 244             ApiLock();
 245             return FALSE;
 246         }
 247
 248         Orig = AdapterInfo;
 249         for (; AdapterInfo != NULL; AdapterInfo = AdapterInfo->Next)
 250         {
 251             if (AdapterInfo->Index == IfEntry->dwIndex)
 252                 break;
 253         }
 254
 255         if (AdapterInfo == NULL)
 256         {
 257             HeapFree(GetProcessHeap(), 0, Orig);
 258             ApiLock();
 259             return FALSE;
 260         }
 261     }
 262     else if (Ret != NO_ERROR)
 263     {
 264         HeapFree(GetProcessHeap(), 0, Orig);
 265         ApiLock();
 266         return FALSE;
 267     }
 268
 269     if (!strcmp(AdapterInfo->IpAddressList.IpAddress.String, ZeroAddress))
 270     {
 271         HeapFree(GetProcessHeap(), 0, Orig);
 272         ApiLock();
 273         return TRUE;
 274     }
 275     else
 276     {
 277         HeapFree(GetProcessHeap(), 0, Orig);
 278         ApiLock();
 279         return FALSE;
 280     }
 281 }
 282
 283 /*
 284  * XXX Figure out the way to bind a specific adapter to a socket.
 285  */
 286 DWORD WINAPI AdapterDiscoveryThread(LPVOID Context) {
 287     PMIB_IFTABLE Table = (PMIB_IFTABLE) malloc(sizeof(MIB_IFTABLE));
 288     DWORD Error, Size = sizeof(MIB_IFTABLE);
 289     PDHCP_ADAPTER Adapter = NULL;
 290     HANDLE AdapterStateChangedEvent = (HANDLE)Context;
 291     struct interface_info *ifi = NULL;
 292     struct protocol *proto;
 293     int i, AdapterCount = 0, Broadcast;
 294
 295     /* FIXME: Kill this thread when the service is stopped */
 296
 297     do {
 298        DH_DbgPrint(MID_TRACE,("Getting Adapter List...\n"));
 299
 300        while( (Error = GetIfTable(Table, &Size, 0 )) ==
 301                ERROR_INSUFFICIENT_BUFFER ) {
 302            DH_DbgPrint(MID_TRACE,("Error %d, New Buffer Size: %d\n", Error, Size));
 303            free( Table );
 304            Table = (PMIB_IFTABLE) malloc( Size );
 305        }
 306
 307        if( Error != NO_ERROR )
 308        {
 309            /* HACK: We are waiting until TCP/IP starts */
 310            Sleep(2000);
 311            continue;
 312        }
 313
 314        DH_DbgPrint(MID_TRACE,("Got Adapter List (%d entries)\n", Table->dwNumEntries));
 315
 316        for( i = Table->dwNumEntries - 1; i >= 0; i-- ) {
 317             DH_DbgPrint(MID_TRACE,("Getting adapter %d attributes\n",
 318                                    Table->table[i].dwIndex));
 319
 320             ApiLock();
 321
 322             if ((Adapter = AdapterFindByHardwareAddress(Table->table[i].bPhysAddr, Table->table[i].dwPhysAddrLen)))
 323             {
 324                 proto = find_protocol_by_adapter(&Adapter->DhclientInfo);
 325
 326                 /* This is an existing adapter */
 327                 if (InterfaceConnected(&Table->table[i])) {
 328                     /* We're still active so we stay in the list */
 329                     ifi = &Adapter->DhclientInfo;
 330
 331                     /* This is a hack because IP helper API sucks */
 332                     if (IsReconnectHackNeeded(Adapter, &Table->table[i]))
 333                     {
 334                         /* This handles a disconnect/reconnect */
 335
 336                         if (proto)
 337                             remove_protocol(proto);
 338                         Adapter->DhclientInfo.client->state = S_INIT;
 339
 340                         /* These are already invalid since the media state change */
 341                         Adapter->RouterMib.dwForwardNextHop = 0;
 342                         Adapter->NteContext = 0;
 343
 344                         add_protocol(Adapter->DhclientInfo.name,
 345                                      Adapter->DhclientInfo.rfdesc,
 346                                      got_one, &Adapter->DhclientInfo);
 347                         state_init(&Adapter->DhclientInfo);
 348
 349                         SetEvent(AdapterStateChangedEvent);
 350                     }
 351
 352                 } else {
 353                     if (proto)
 354                         remove_protocol(proto);
 355
 356                     /* We've lost our link so out we go */
 357                     RemoveEntryList(&Adapter->ListEntry);
 358                     free(Adapter);
 359                 }
 360
 361                 ApiUnlock();
 362
 363                 continue;
 364             }
 365
 366             ApiUnlock();
 367
 368             Adapter = (DHCP_ADAPTER*) calloc( sizeof( DHCP_ADAPTER ) + Table->table[i].dwMtu, 1 );
 369
 370             if( Adapter && Table->table[i].dwType == MIB_IF_TYPE_ETHERNET && InterfaceConnected(&Table->table[i])) {
 371                 memcpy( &Adapter->IfMib, &Table->table[i],
 372                         sizeof(Adapter->IfMib) );
 373                 Adapter->DhclientInfo.client = &Adapter->DhclientState;
 374                 Adapter->DhclientInfo.rbuf = Adapter->recv_buf;
 375                 Adapter->DhclientInfo.rbuf_max = Table->table[i].dwMtu;
 376                 Adapter->DhclientInfo.rbuf_len =
 377                     Adapter->DhclientInfo.rbuf_offset = 0;
 378                 memcpy(Adapter->DhclientInfo.hw_address.haddr,
 379                        Adapter->IfMib.bPhysAddr,
 380                        Adapter->IfMib.dwPhysAddrLen);
 381                 Adapter->DhclientInfo.hw_address.hlen = Adapter->IfMib.dwPhysAddrLen;
 382
 383                 /* I'm not sure where else to set this, but
 384                    some DHCP servers won't take a zero.
 385                    We checked the hardware type earlier in
 386                    the if statement. */
 387                 Adapter->DhclientInfo.hw_address.htype = HTYPE_ETHER;
 388
 389                 if( DhcpSocket == INVALID_SOCKET ) {
 390                     DhcpSocket =
 391                         Adapter->DhclientInfo.rfdesc =
 392                         Adapter->DhclientInfo.wfdesc =
 393                         socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP );
 394
 395                     if (DhcpSocket != INVALID_SOCKET) {
 396
 397                                                 /* Allow broadcast on this socket */
 398                                                 Broadcast = 1;
 399                                                 setsockopt(DhcpSocket,
 400                                                                    SOL_SOCKET,
 401                                                                    SO_BROADCAST,
 402                                                                    (const char *)&Broadcast,
 403                                                                    sizeof(Broadcast));
 404
 405                         Adapter->ListenAddr.sin_family = AF_INET;
 406                         Adapter->ListenAddr.sin_port = htons(LOCAL_PORT);
 407                         Adapter->BindStatus =
 408                              (bind( Adapter->DhclientInfo.rfdesc,
 409                                     (struct sockaddr *)&Adapter->ListenAddr,
 410                                     sizeof(Adapter->ListenAddr) ) == 0) ?
 411                              0 : WSAGetLastError();
 412                     } else {
 413                         error("socket() failed: %d\n", WSAGetLastError());
 414                     }
 415                 } else {
 416                     Adapter->DhclientInfo.rfdesc =
 417                         Adapter->DhclientInfo.wfdesc = DhcpSocket;
 418                 }
 419
 420                 Adapter->DhclientConfig.timeout = DHCP_PANIC_TIMEOUT;
 421                 Adapter->DhclientConfig.initial_interval = DHCP_DISCOVER_INTERVAL;
 422                 Adapter->DhclientConfig.retry_interval = DHCP_DISCOVER_INTERVAL;
 423                 Adapter->DhclientConfig.select_interval = 1;
 424                 Adapter->DhclientConfig.reboot_timeout = DHCP_REBOOT_TIMEOUT;
 425                 Adapter->DhclientConfig.backoff_cutoff = DHCP_BACKOFF_MAX;
 426                 Adapter->DhclientState.interval =
 427                     Adapter->DhclientConfig.retry_interval;
 428
 429                 if( PrepareAdapterForService( Adapter ) ) {
 430                     Adapter->DhclientInfo.next = ifi;
 431                     ifi = &Adapter->DhclientInfo;
 432
 433                     read_client_conf(&Adapter->DhclientInfo);
 434
 435                     if (Adapter->DhclientInfo.client->state == S_INIT)
 436                     {
 437                         add_protocol(Adapter->DhclientInfo.name,
 438                                      Adapter->DhclientInfo.rfdesc,
 439                                      got_one, &Adapter->DhclientInfo);
 440
 441                         state_init(&Adapter->DhclientInfo);
 442                     }
 443
 444                     ApiLock();
 445                     InsertTailList( &AdapterList, &Adapter->ListEntry );
 446                     AdapterCount++;
 447                     SetEvent(AdapterStateChangedEvent);
 448                     ApiUnlock();
 449                 } else { free( Adapter ); Adapter = 0; }
 450             } else { free( Adapter ); Adapter = 0; }
 451
 452             if( !Adapter )
 453                 DH_DbgPrint(MID_TRACE,("Adapter %d was rejected\n",
 454                                        Table->table[i].dwIndex));
 455         }
 456 #if 0
 457         Error = NotifyAddrChange(NULL, NULL);
 458         if (Error != NO_ERROR)
 459             break;
 460 #else
 461         Sleep(3000);
 462 #endif
 463     } while (TRUE);
 464
 465     DbgPrint("DHCPCSVC: Adapter discovery thread is terminating! (Error: %d)\n", Error);
 466
 467     if( Table ) free( Table );
 468     return Error;
 469 }
 470
 471 HANDLE StartAdapterDiscovery(VOID) {
 472     HANDLE ThreadHandle, EventHandle;
 473
 474     EventHandle = CreateEvent(NULL,
 475                               FALSE,
 476                               FALSE,
 477                               NULL);
 478
 479     ThreadHandle = CreateThread(NULL,
 480                                 0,
 481                                 AdapterDiscoveryThread,
 482                                 (LPVOID)EventHandle,
 483                                 0,
 484                                 NULL);
 485
 486     if (ThreadHandle == NULL)
 487         return NULL;
 488
 489     CloseHandle(ThreadHandle);
 490
 491     return EventHandle;
 492 }
 493
 494 void AdapterStop() {
 495     PLIST_ENTRY ListEntry;
 496     PDHCP_ADAPTER Adapter;
 497     ApiLock();
 498     while( !IsListEmpty( &AdapterList ) ) {
 499         ListEntry = (PLIST_ENTRY)RemoveHeadList( &AdapterList );
 500         Adapter = CONTAINING_RECORD( ListEntry, DHCP_ADAPTER, ListEntry );
 501         free( Adapter );
 502     }
 503     ApiUnlock();
 504     WSACleanup();
 505 }
 506
 507 PDHCP_ADAPTER AdapterFindIndex( unsigned int indx ) {
 508     PDHCP_ADAPTER Adapter;
 509     PLIST_ENTRY ListEntry;
 510
 511     for( ListEntry = AdapterList.Flink;
 512          ListEntry != &AdapterList;
 513          ListEntry = ListEntry->Flink ) {
 514         Adapter = CONTAINING_RECORD( ListEntry, DHCP_ADAPTER, ListEntry );
 515         if( Adapter->IfMib.dwIndex == indx ) return Adapter;
 516     }
 517
 518     return NULL;
 519 }
 520
 521 PDHCP_ADAPTER AdapterFindName( const WCHAR *name ) {
 522     PDHCP_ADAPTER Adapter;
 523     PLIST_ENTRY ListEntry;
 524
 525     for( ListEntry = AdapterList.Flink;
 526          ListEntry != &AdapterList;
 527          ListEntry = ListEntry->Flink ) {
 528         Adapter = CONTAINING_RECORD( ListEntry, DHCP_ADAPTER, ListEntry );
 529         if( !wcsicmp( Adapter->IfMib.wszName, name ) ) return Adapter;
 530     }
 531
 532     return NULL;
 533 }
 534
 535 PDHCP_ADAPTER AdapterFindInfo( struct interface_info *ip ) {
 536     PDHCP_ADAPTER Adapter;
 537     PLIST_ENTRY ListEntry;
 538
 539     for( ListEntry = AdapterList.Flink;
 540          ListEntry != &AdapterList;
 541          ListEntry = ListEntry->Flink ) {
 542         Adapter = CONTAINING_RECORD( ListEntry, DHCP_ADAPTER, ListEntry );
 543         if( ip == &Adapter->DhclientInfo ) return Adapter;
 544     }
 545
 546     return NULL;
 547 }
 548
 549 PDHCP_ADAPTER AdapterFindByHardwareAddress( u_int8_t haddr[16], u_int8_t hlen ) {
 550     PDHCP_ADAPTER Adapter;
 551     PLIST_ENTRY ListEntry;
 552
 553     for(ListEntry = AdapterList.Flink;
 554         ListEntry != &AdapterList;
 555         ListEntry = ListEntry->Flink) {
 556        Adapter = CONTAINING_RECORD( ListEntry, DHCP_ADAPTER, ListEntry );
 557        if (Adapter->DhclientInfo.hw_address.hlen == hlen &&
 558            !memcmp(Adapter->DhclientInfo.hw_address.haddr,
 559                   haddr,
 560                   hlen)) return Adapter;
 561     }
 562
 563     return NULL;
 564 }
 565
 566 PDHCP_ADAPTER AdapterGetFirst() {
 567     if( IsListEmpty( &AdapterList ) ) return NULL; else {
 568         return CONTAINING_RECORD
 569             ( AdapterList.Flink, DHCP_ADAPTER, ListEntry );
 570     }
 571 }
 572
 573 PDHCP_ADAPTER AdapterGetNext( PDHCP_ADAPTER This )
 574 {
 575     if( This->ListEntry.Flink == &AdapterList ) return NULL;
 576     return CONTAINING_RECORD
 577         ( This->ListEntry.Flink, DHCP_ADAPTER, ListEntry );
 578 }
 579
 580 void if_register_send(struct interface_info *ip) {
 581
 582 }
 583
 584 void if_register_receive(struct interface_info *ip) {
 585 }