reactos/base/services/dhcp/adapter.c

   1 #include "rosdhcp.h"
   2
   3 static 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     DH_DbgPrint(MID_TRACE,("MaxSubKeys: %d, MaxSubKeyLen %d\n",
  26                            MaxSubKeys, MaxSubKeyLen));
  27
  28     CharTotal = (sizeof(PCHAR) + MaxSubKeyLen + AppendLen) * (MaxSubKeys + 1);
  29
  30     DH_DbgPrint(MID_TRACE,("AppendLen: %d, CharTotal: %d\n",
  31                            AppendLen, CharTotal));
  32
  33     Out = (CHAR**) malloc( CharTotal );
  34     OutKeyName = ((PCHAR)&Out[MaxSubKeys+1]);
  35
  36     if( !Out ) { RegCloseKey( MainKey ); return NULL; }
  37
  38     i = 0;
  39     do {
  40         Out[i] = OutKeyName;
  41         Error = RegEnumKey( MainKey, i, OutKeyName, MaxSubKeyLen );
  42         if( !Error ) {
  43             strcat( OutKeyName, Append );
  44             DH_DbgPrint(MID_TRACE,("[%d]: %s\n", i, OutKeyName));
  45             OutKeyName += strlen(OutKeyName) + 1;
  46             i++;
  47         } else Out[i] = 0;
  48     } while( Error == ERROR_SUCCESS );
  49
  50     RegCloseKey( MainKey );
  51
  52     return Out;
  53 }
  54
  55 PCHAR RegReadString( HKEY Root, PCHAR Subkey, PCHAR Value ) {
  56     PCHAR SubOut = NULL;
  57     DWORD SubOutLen = 0, Error = 0;
  58     HKEY  ValueKey = NULL;
  59
  60     DH_DbgPrint(MID_TRACE,("Looking in %x:%s:%s\n", Root, Subkey, Value ));
  61
  62     if( Subkey && strlen(Subkey) ) {
  63         if( RegOpenKey( Root, Subkey, &ValueKey ) != ERROR_SUCCESS )
  64             goto regerror;
  65     } else ValueKey = Root;
  66
  67     DH_DbgPrint(MID_TRACE,("Got Key %x\n", ValueKey));
  68
  69     if( (Error = RegQueryValueEx( ValueKey, Value, NULL, NULL,
  70                                   (LPBYTE)SubOut, &SubOutLen )) != ERROR_SUCCESS )
  71         goto regerror;
  72
  73     DH_DbgPrint(MID_TRACE,("Value %s has size %d\n", Value, SubOutLen));
  74
  75     if( !(SubOut = (CHAR*) malloc(SubOutLen)) )
  76         goto regerror;
  77
  78     if( (Error = RegQueryValueEx( ValueKey, Value, NULL, NULL,
  79                                   (LPBYTE)SubOut, &SubOutLen )) != ERROR_SUCCESS )
  80         goto regerror;
  81
  82     DH_DbgPrint(MID_TRACE,("Value %s is %s\n", Value, SubOut));
  83
  84     goto cleanup;
  85
  86 regerror:
  87     if( SubOut ) { free( SubOut ); SubOut = NULL; }
  88 cleanup:
  89     if( ValueKey && ValueKey != Root ) {
  90         DH_DbgPrint(MID_TRACE,("Closing key %x\n", ValueKey));
  91         RegCloseKey( ValueKey );
  92     }
  93
  94     DH_DbgPrint(MID_TRACE,("Returning %x with error %d\n", SubOut, Error));
  95
  96     return SubOut;
  97 }
  98
  99 HKEY FindAdapterKey( PDHCP_ADAPTER Adapter ) {
 100     int i = 0;
 101     PCHAR EnumKeyName =
 102         "SYSTEM\\CurrentControlSet\\Control\\Class\\"
 103         "{4D36E972-E325-11CE-BFC1-08002BE10318}";
 104     PCHAR TargetKeyNameStart =
 105         "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\";
 106     PCHAR TargetKeyName = NULL;
 107     PCHAR *EnumKeysLinkage = GetSubkeyNames( EnumKeyName, "\\Linkage" );
 108     PCHAR *EnumKeysTop     = GetSubkeyNames( EnumKeyName, "" );
 109     PCHAR RootDevice = NULL;
 110     HKEY EnumKey, OutKey = NULL;
 111     DWORD Error = ERROR_SUCCESS;
 112
 113     if( !EnumKeysLinkage || !EnumKeysTop ) goto cleanup;
 114
 115     Error = RegOpenKey( HKEY_LOCAL_MACHINE, EnumKeyName, &EnumKey );
 116
 117     if( Error ) goto cleanup;
 118
 119     for( i = 0; EnumKeysLinkage[i]; i++ ) {
 120         RootDevice = RegReadString
 121             ( EnumKey, EnumKeysLinkage[i], "RootDevice" );
 122
 123         if( RootDevice &&
 124             !strcmp( RootDevice, Adapter->DhclientInfo.name ) ) {
 125             TargetKeyName =
 126                 (CHAR*) malloc( strlen( TargetKeyNameStart ) +
 127                         strlen( RootDevice ) + 1);
 128             if( !TargetKeyName ) goto cleanup;
 129             sprintf( TargetKeyName, "%s%s",
 130                      TargetKeyNameStart, RootDevice );
 131             Error = RegCreateKeyExA( HKEY_LOCAL_MACHINE, TargetKeyName, 0, NULL, 0, KEY_READ, NULL, &OutKey, NULL );
 132             break;
 133         } else {
 134             free( RootDevice ); RootDevice = 0;
 135         }
 136     }
 137
 138 cleanup:
 139     if( RootDevice ) free( RootDevice );
 140     if( EnumKeysLinkage ) free( EnumKeysLinkage );
 141     if( EnumKeysTop ) free( EnumKeysTop );
 142     if( TargetKeyName ) free( TargetKeyName );
 143
 144     return OutKey;
 145 }
 146
 147 BOOL PrepareAdapterForService( PDHCP_ADAPTER Adapter ) {
 148     HKEY AdapterKey = NULL;
 149     PCHAR IPAddress = NULL, Netmask = NULL, DefaultGateway = NULL;
 150     NTSTATUS Status = STATUS_SUCCESS;
 151     DWORD Error = ERROR_SUCCESS;
 152
 153     Adapter->DhclientState.config = &Adapter->DhclientConfig;
 154     strncpy(Adapter->DhclientInfo.name, (char*)Adapter->IfMib.bDescr,
 155             sizeof(Adapter->DhclientInfo.name));
 156
 157     AdapterKey = FindAdapterKey( Adapter );
 158     if( AdapterKey )
 159         IPAddress = RegReadString( AdapterKey, NULL, "IPAddress" );
 160
 161     if( IPAddress && strcmp( IPAddress, "0.0.0.0" ) ) {
 162         /* Non-automatic case */
 163         DH_DbgPrint
 164             (MID_TRACE,("Adapter Name: [%s] (Bind Status %x) (static %s)\n",
 165                         Adapter->DhclientInfo.name,
 166                         Adapter->BindStatus,
 167                         IPAddress));
 168
 169         Adapter->DhclientState.state = S_STATIC;
 170
 171         Netmask = RegReadString( AdapterKey, NULL, "Subnetmask" );
 172
 173         Status = AddIPAddress( inet_addr( IPAddress ),
 174                                inet_addr( Netmask ? Netmask : "255.255.255.0" ),
 175                                Adapter->IfMib.dwIndex,
 176                                &Adapter->NteContext,
 177                                &Adapter->NteInstance );
 178
 179         DefaultGateway = RegReadString( AdapterKey, NULL, "DefaultGateway" );
 180
 181         if( DefaultGateway ) {
 182             Adapter->RouterMib.dwForwardDest = 0;
 183             Adapter->RouterMib.dwForwardMask = 0;
 184             Adapter->RouterMib.dwForwardMetric1 = 1;
 185             Adapter->RouterMib.dwForwardNextHop = inet_addr(DefaultGateway);
 186             Error = CreateIpForwardEntry( &Adapter->RouterMib );
 187             if( Error )
 188                 warning("Failed to set default gateway %s: %ld\n",
 189                         DefaultGateway, Error);
 190         }
 191
 192         if( DefaultGateway ) free( DefaultGateway );
 193         if( Netmask ) free( Netmask );
 194     } else {
 195         /* Automatic case */
 196         DH_DbgPrint
 197             (MID_TRACE,("Adapter Name: [%s] (Bind Status %x) (dynamic)\n",
 198                         Adapter->DhclientInfo.name,
 199                         Adapter->BindStatus));
 200
 201         add_protocol(Adapter->DhclientInfo.name, Adapter->DhclientInfo.rfdesc, got_one, &Adapter->DhclientInfo);
 202         Adapter->DhclientInfo.client->state = S_INIT;
 203         state_reboot(&Adapter->DhclientInfo);
 204     }
 205
 206     if( IPAddress ) free( IPAddress );
 207
 208     return TRUE;
 209 }
 210
 211 void AdapterInit() {
 212     WSAStartup(0x0101,&wsd);
 213
 214     InitializeListHead( &AdapterList );
 215 }
 216
 217 int
 218 InterfaceConnected(MIB_IFROW IfEntry)
 219 {
 220     if (IfEntry.dwOperStatus == IF_OPER_STATUS_CONNECTED ||
 221         IfEntry.dwOperStatus == IF_OPER_STATUS_OPERATIONAL)
 222         return 1;
 223
 224     DH_DbgPrint(MID_TRACE,("Interface %d is down\n", IfEntry.dwIndex));
 225     return 0;
 226 }
 227
 228 /*
 229  * XXX Figure out the way to bind a specific adapter to a socket.
 230  */
 231 BOOLEAN AdapterDiscover() {
 232     PMIB_IFTABLE Table = (PMIB_IFTABLE) malloc(sizeof(MIB_IFTABLE));
 233     DWORD Error, Size = sizeof(MIB_IFTABLE);
 234     PDHCP_ADAPTER Adapter = NULL;
 235     struct interface_info *ifi = NULL;
 236     int i;
 237     BOOLEAN ret = TRUE;
 238
 239     DH_DbgPrint(MID_TRACE,("Getting Adapter List...\n"));
 240
 241     while( (Error = GetIfTable(Table, &Size, 0 )) ==
 242            ERROR_INSUFFICIENT_BUFFER ) {
 243         DH_DbgPrint(MID_TRACE,("Error %d, New Buffer Size: %d\n", Error, Size));
 244         free( Table );
 245         Table = (PMIB_IFTABLE) malloc( Size );
 246     }
 247
 248     if( Error != NO_ERROR ) {
 249         ret = FALSE;
 250         goto term;
 251     }
 252
 253     DH_DbgPrint(MID_TRACE,("Got Adapter List (%d entries)\n", Table->dwNumEntries));
 254
 255     for( i = Table->dwNumEntries - 1; i >= 0; i-- ) {
 256         DH_DbgPrint(MID_TRACE,("Getting adapter %d attributes\n",
 257                                Table->table[i].dwIndex));
 258
 259         if ((Adapter = AdapterFindByHardwareAddress(Table->table[i].bPhysAddr, Table->table[i].dwPhysAddrLen)))
 260         {
 261             /* This is an existing adapter */
 262             if (InterfaceConnected(Table->table[i])) {
 263                 /* We're still active so we stay in the list */
 264                 ifi = &Adapter->DhclientInfo;
 265             } else {
 266                 /* We've lost our link so out we go */
 267                 RemoveEntryList(&Adapter->ListEntry);
 268                 free(Adapter);
 269             }
 270
 271             continue;
 272         }
 273
 274         Adapter = (DHCP_ADAPTER*) calloc( sizeof( DHCP_ADAPTER ) + Table->table[i].dwMtu, 1 );
 275
 276         if( Adapter && Table->table[i].dwType == MIB_IF_TYPE_ETHERNET && InterfaceConnected(Table->table[i])) {
 277             memcpy( &Adapter->IfMib, &Table->table[i],
 278                     sizeof(Adapter->IfMib) );
 279             Adapter->DhclientInfo.client = &Adapter->DhclientState;
 280             Adapter->DhclientInfo.rbuf = Adapter->recv_buf;
 281             Adapter->DhclientInfo.rbuf_max = Table->table[i].dwMtu;
 282             Adapter->DhclientInfo.rbuf_len =
 283                 Adapter->DhclientInfo.rbuf_offset = 0;
 284             memcpy(Adapter->DhclientInfo.hw_address.haddr,
 285                    Adapter->IfMib.bPhysAddr,
 286                    Adapter->IfMib.dwPhysAddrLen);
 287             Adapter->DhclientInfo.hw_address.hlen  =
 288                 Adapter->IfMib.dwPhysAddrLen;
 289             /* I'm not sure where else to set this, but
 290                some DHCP servers won't take a zero.
 291                We checked the hardware type earlier in
 292                the if statement. */
 293             Adapter->DhclientInfo.hw_address.htype  =
 294                 HTYPE_ETHER;
 295
 296             if( DhcpSocket == INVALID_SOCKET ) {
 297                 DhcpSocket =
 298                     Adapter->DhclientInfo.rfdesc =
 299                     Adapter->DhclientInfo.wfdesc =
 300                     socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP );
 301
 302                 if (DhcpSocket != INVALID_SOCKET) {
 303                     Adapter->ListenAddr.sin_family = AF_INET;
 304                     Adapter->ListenAddr.sin_port = htons(LOCAL_PORT);
 305                     Adapter->BindStatus =
 306                         (bind( Adapter->DhclientInfo.rfdesc,
 307                                (struct sockaddr *)&Adapter->ListenAddr,
 308                                sizeof(Adapter->ListenAddr) ) == 0) ?
 309                         0 : WSAGetLastError();
 310                 } else {
 311                     error("socket() failed: %d\n", WSAGetLastError());
 312                 }
 313             } else {
 314                 Adapter->DhclientInfo.rfdesc =
 315                     Adapter->DhclientInfo.wfdesc = DhcpSocket;
 316             }
 317
 318             Adapter->DhclientConfig.timeout = DHCP_PANIC_TIMEOUT;
 319             Adapter->DhclientConfig.initial_interval = DHCP_DISCOVER_INTERVAL;
 320             Adapter->DhclientConfig.retry_interval = DHCP_DISCOVER_INTERVAL;
 321             Adapter->DhclientConfig.select_interval = 1;
 322             Adapter->DhclientConfig.reboot_timeout = DHCP_REBOOT_TIMEOUT;
 323             Adapter->DhclientConfig.backoff_cutoff = DHCP_BACKOFF_MAX;
 324             Adapter->DhclientState.interval =
 325                 Adapter->DhclientConfig.retry_interval;
 326
 327             if( PrepareAdapterForService( Adapter ) ) {
 328                 Adapter->DhclientInfo.next = ifi;
 329                 ifi = &Adapter->DhclientInfo;
 330
 331                 read_client_conf(&Adapter->DhclientInfo);
 332
 333                 InsertTailList( &AdapterList, &Adapter->ListEntry );
 334             } else { free( Adapter ); Adapter = 0; }
 335         } else { free( Adapter ); Adapter = 0; }
 336
 337         if( !Adapter )
 338             DH_DbgPrint(MID_TRACE,("Adapter %d was rejected\n",
 339                                    Table->table[i].dwIndex));
 340     }
 341
 342     DH_DbgPrint(MID_TRACE,("done with AdapterInit\n"));
 343
 344 term:
 345     if( Table ) free( Table );
 346     return ret;
 347 }
 348
 349 void AdapterStop() {
 350     PLIST_ENTRY ListEntry;
 351     PDHCP_ADAPTER Adapter;
 352     while( !IsListEmpty( &AdapterList ) ) {
 353         ListEntry = (PLIST_ENTRY)RemoveHeadList( &AdapterList );
 354         Adapter = CONTAINING_RECORD( ListEntry, DHCP_ADAPTER, ListEntry );
 355         free( Adapter );
 356     }
 357     WSACleanup();
 358 }
 359
 360 PDHCP_ADAPTER AdapterFindIndex( unsigned int indx ) {
 361     PDHCP_ADAPTER Adapter;
 362     PLIST_ENTRY ListEntry;
 363
 364     for( ListEntry = AdapterList.Flink;
 365          ListEntry != &AdapterList;
 366          ListEntry = ListEntry->Flink ) {
 367         Adapter = CONTAINING_RECORD( ListEntry, DHCP_ADAPTER, ListEntry );
 368         if( Adapter->IfMib.dwIndex == indx ) return Adapter;
 369     }
 370
 371     return NULL;
 372 }
 373
 374 PDHCP_ADAPTER AdapterFindName( const WCHAR *name ) {
 375     PDHCP_ADAPTER Adapter;
 376     PLIST_ENTRY ListEntry;
 377
 378     for( ListEntry = AdapterList.Flink;
 379          ListEntry != &AdapterList;
 380          ListEntry = ListEntry->Flink ) {
 381         Adapter = CONTAINING_RECORD( ListEntry, DHCP_ADAPTER, ListEntry );
 382         if( !wcsicmp( Adapter->IfMib.wszName, name ) ) return Adapter;
 383     }
 384
 385     return NULL;
 386 }
 387
 388 PDHCP_ADAPTER AdapterFindInfo( struct interface_info *ip ) {
 389     PDHCP_ADAPTER Adapter;
 390     PLIST_ENTRY ListEntry;
 391
 392     for( ListEntry = AdapterList.Flink;
 393          ListEntry != &AdapterList;
 394          ListEntry = ListEntry->Flink ) {
 395         Adapter = CONTAINING_RECORD( ListEntry, DHCP_ADAPTER, ListEntry );
 396         if( ip == &Adapter->DhclientInfo ) return Adapter;
 397     }
 398
 399     return NULL;
 400 }
 401
 402 PDHCP_ADAPTER AdapterFindByHardwareAddress( u_int8_t haddr[16], u_int8_t hlen ) {
 403     PDHCP_ADAPTER Adapter;
 404     PLIST_ENTRY ListEntry;
 405
 406     for(ListEntry = AdapterList.Flink;
 407         ListEntry != &AdapterList;
 408         ListEntry = ListEntry->Flink) {
 409        Adapter = CONTAINING_RECORD( ListEntry, DHCP_ADAPTER, ListEntry );
 410        if (Adapter->DhclientInfo.hw_address.hlen == hlen &&
 411            !memcmp(Adapter->DhclientInfo.hw_address.haddr,
 412                   haddr,
 413                   hlen)) return Adapter;
 414     }
 415
 416     return NULL;
 417 }
 418
 419 PDHCP_ADAPTER AdapterGetFirst() {
 420     if( IsListEmpty( &AdapterList ) ) return NULL; else {
 421         return CONTAINING_RECORD
 422             ( AdapterList.Flink, DHCP_ADAPTER, ListEntry );
 423     }
 424 }
 425
 426 PDHCP_ADAPTER AdapterGetNext( PDHCP_ADAPTER This )
 427 {
 428     if( This->ListEntry.Flink == &AdapterList ) return NULL;
 429     return CONTAINING_RECORD
 430         ( This->ListEntry.Flink, DHCP_ADAPTER, ListEntry );
 431 }
 432
 433 void if_register_send(struct interface_info *ip) {
 434
 435 }
 436
 437 void if_register_receive(struct interface_info *ip) {
 438 }