dlls/inetmib1/main.c

   1 /*
   2  * Copyright 2008 Juan Lang
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "config.h"
  20 #include <assert.h>
  21 #include <stdarg.h>
  22 #include <stdlib.h>
  23 #include <limits.h>
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "snmp.h"
  27 #include "iphlpapi.h"
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(inetmib1);
  31
  32 /**
  33  * Utility functions
  34  */
  35 static DWORD copyInt(AsnAny *value, void *src)
  36 {
  37     value->asnType = ASN_INTEGER;
  38     value->asnValue.number = *(DWORD *)src;
  39     return SNMP_ERRORSTATUS_NOERROR;
  40 }
  41
  42 static void setStringValue(AsnAny *value, BYTE type, DWORD len, BYTE *str)
  43 {
  44     AsnAny strValue;
  45
  46     strValue.asnType = type;
  47     strValue.asnValue.string.stream = str;
  48     strValue.asnValue.string.length = len;
  49     strValue.asnValue.string.dynamic = FALSE;
  50     SnmpUtilAsnAnyCpy(value, &strValue);
  51 }
  52
  53 typedef DWORD (*copyValueFunc)(AsnAny *value, void *src);
  54
  55 struct structToAsnValue
  56 {
  57     size_t        offset;
  58     copyValueFunc copy;
  59 };
  60
  61 static AsnInteger32 mapStructEntryToValue(struct structToAsnValue *map,
  62     UINT mapLen, void *record, UINT id, BYTE bPduType, SnmpVarBind *pVarBind)
  63 {
  64     /* OIDs are 1-based */
  65     if (!id)
  66         return SNMP_ERRORSTATUS_NOSUCHNAME;
  67     --id;
  68     if (id >= mapLen)
  69         return SNMP_ERRORSTATUS_NOSUCHNAME;
  70     if (!map[id].copy)
  71         return SNMP_ERRORSTATUS_NOSUCHNAME;
  72     return map[id].copy(&pVarBind->value, (BYTE *)record + map[id].offset);
  73 }
  74
  75 static DWORD copyIpAddr(AsnAny *value, void *src)
  76 {
  77     setStringValue(value, ASN_IPADDRESS, sizeof(DWORD), src);
  78     return SNMP_ERRORSTATUS_NOERROR;
  79 }
  80
  81 static UINT mib2[] = { 1,3,6,1,2,1 };
  82 static UINT mib2System[] = { 1,3,6,1,2,1,1 };
  83
  84 typedef BOOL (*varqueryfunc)(BYTE bPduType, SnmpVarBind *pVarBind,
  85     AsnInteger32 *pErrorStatus);
  86
  87 struct mibImplementation
  88 {
  89     AsnObjectIdentifier name;
  90     void              (*init)(void);
  91     varqueryfunc        query;
  92     void              (*cleanup)(void);
  93 };
  94
  95 static UINT mib2IfNumber[] = { 1,3,6,1,2,1,2,1 };
  96 static PMIB_IFTABLE ifTable;
  97
  98 static void mib2IfNumberInit(void)
  99 {
 100     DWORD size = 0, ret = GetIfTable(NULL, &size, FALSE);
 101
 102     if (ret == ERROR_INSUFFICIENT_BUFFER)
 103     {
 104         MIB_IFTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 105         if (table)
 106         {
 107             if (!GetIfTable(table, &size, FALSE)) ifTable = table;
 108             else HeapFree(GetProcessHeap(), 0, table );
 109         }
 110     }
 111 }
 112
 113 static void mib2IfNumberCleanup(void)
 114 {
 115     HeapFree(GetProcessHeap(), 0, ifTable);
 116 }
 117
 118 static BOOL mib2IfNumberQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 119     AsnInteger32 *pErrorStatus)
 120 {
 121     AsnObjectIdentifier numberOid = DEFINE_OID(mib2IfNumber);
 122     BOOL ret = TRUE;
 123
 124     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 125         pErrorStatus);
 126
 127     switch (bPduType)
 128     {
 129     case SNMP_PDU_GET:
 130     case SNMP_PDU_GETNEXT:
 131         if ((bPduType == SNMP_PDU_GET &&
 132             !SnmpUtilOidNCmp(&pVarBind->name, &numberOid, numberOid.idLength))
 133             || SnmpUtilOidNCmp(&pVarBind->name, &numberOid, numberOid.idLength)
 134             < 0)
 135         {
 136             DWORD numIfs = ifTable ? ifTable->dwNumEntries : 0;
 137
 138             copyInt(&pVarBind->value, &numIfs);
 139             if (bPduType == SNMP_PDU_GETNEXT)
 140             {
 141                 SnmpUtilOidFree(&pVarBind->name);
 142                 SnmpUtilOidCpy(&pVarBind->name, &numberOid);
 143             }
 144             *pErrorStatus = SNMP_ERRORSTATUS_NOERROR;
 145         }
 146         else
 147         {
 148             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 149             /* Caller deals with OID if bPduType == SNMP_PDU_GETNEXT, so don't
 150              * need to set it here.
 151              */
 152         }
 153         break;
 154     case SNMP_PDU_SET:
 155         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 156         ret = FALSE;
 157         break;
 158     default:
 159         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 160         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 161     }
 162     return ret;
 163 }
 164
 165 static DWORD copyOperStatus(AsnAny *value, void *src)
 166 {
 167     value->asnType = ASN_INTEGER;
 168     /* The IPHlpApi definition of operational status differs from the MIB2 one,
 169      * so map it to the MIB2 value.
 170      */
 171     switch (*(DWORD *)src)
 172     {
 173     case MIB_IF_OPER_STATUS_OPERATIONAL:
 174         value->asnValue.number = MIB_IF_ADMIN_STATUS_UP;
 175         break;
 176     case MIB_IF_OPER_STATUS_CONNECTING:
 177     case MIB_IF_OPER_STATUS_CONNECTED:
 178         value->asnValue.number = MIB_IF_ADMIN_STATUS_TESTING;
 179         break;
 180     default:
 181         value->asnValue.number = MIB_IF_ADMIN_STATUS_DOWN;
 182     };
 183     return SNMP_ERRORSTATUS_NOERROR;
 184 }
 185
 186 /* Given an OID and a base OID that it must begin with, finds the item and
 187  * integer instance from the OID.  E.g., given an OID foo.1.2 and a base OID
 188  * foo, returns item 1 and instance 2.
 189  * If bPduType is not SNMP_PDU_GETNEXT and either the item or instance is
 190  * missing, returns SNMP_ERRORSTATUS_NOSUCHNAME.
 191  * If bPduType is SNMP_PDU_GETNEXT, returns the successor to the item and
 192  * instance, or item 1, instance 1 if either is missing.
 193  */
 194 static AsnInteger32 getItemAndIntegerInstanceFromOid(AsnObjectIdentifier *oid,
 195     AsnObjectIdentifier *base, BYTE bPduType, UINT *item, UINT *instance)
 196 {
 197     AsnInteger32 ret = SNMP_ERRORSTATUS_NOERROR;
 198
 199     switch (bPduType)
 200     {
 201     case SNMP_PDU_GETNEXT:
 202         if (SnmpUtilOidNCmp(oid, base, base->idLength) < 0)
 203         {
 204             *item = 1;
 205             *instance = 1;
 206         }
 207         else if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 208         {
 209             if (oid->idLength == base->idLength ||
 210                 oid->idLength == base->idLength + 1)
 211             {
 212                 /* Either the table or an item within the table is specified,
 213                  * but the instance is not.  Get the first instance.
 214                  */
 215                 *instance = 1;
 216                 if (oid->idLength == base->idLength + 1)
 217                     *item = oid->ids[base->idLength];
 218                 else
 219                     *item = 1;
 220             }
 221             else
 222             {
 223                 *item = oid->ids[base->idLength];
 224                 *instance = oid->ids[base->idLength + 1] + 1;
 225             }
 226         }
 227         else
 228             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 229         break;
 230     default:
 231         if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 232         {
 233             if (oid->idLength == base->idLength ||
 234                 oid->idLength == base->idLength + 1)
 235             {
 236                 /* Either the table or an item within the table is specified,
 237                  * but the instance is not.
 238                  */
 239                 ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 240             }
 241             else
 242             {
 243                 *item = oid->ids[base->idLength];
 244                 *instance = oid->ids[base->idLength + 1];
 245             }
 246         }
 247         else
 248             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 249     }
 250     return ret;
 251 }
 252
 253 /* Given an OID and a base OID that it must begin with, finds the item from the
 254  * OID.  E.g., given an OID foo.1 and a base OID foo, returns item 1.
 255  * If bPduType is not SNMP_PDU_GETNEXT and the item is missing, returns
 256  * SNMP_ERRORSTATUS_NOSUCHNAME.
 257  * If bPduType is SNMP_PDU_GETNEXT, returns the successor to the item, or item
 258  * 1 if the item is missing.
 259  */
 260 static AsnInteger32 getItemFromOid(AsnObjectIdentifier *oid,
 261     AsnObjectIdentifier *base, BYTE bPduType, UINT *item)
 262 {
 263     AsnInteger32 ret = SNMP_ERRORSTATUS_NOERROR;
 264
 265     switch (bPduType)
 266     {
 267     case SNMP_PDU_GETNEXT:
 268         if (SnmpUtilOidNCmp(oid, base, base->idLength) < 0)
 269             *item = 1;
 270         else if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 271         {
 272             if (oid->idLength == base->idLength)
 273             {
 274                 /* The item is missing, assume the first item */
 275                 *item = 1;
 276             }
 277             else
 278                 *item = oid->ids[base->idLength] + 1;
 279         }
 280         else
 281             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 282         break;
 283     default:
 284         if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 285         {
 286             if (oid->idLength == base->idLength)
 287             {
 288                 /* The item is missing */
 289                 ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 290             }
 291             else
 292             {
 293                 *item = oid->ids[base->idLength];
 294                 if (!*item)
 295                     ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 296             }
 297         }
 298         else
 299             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 300     }
 301     return ret;
 302 }
 303
 304 struct GenericTable
 305 {
 306     DWORD numEntries;
 307     BYTE  entries[1];
 308 };
 309
 310 static DWORD oidToIpAddr(AsnObjectIdentifier *oid)
 311 {
 312     assert(oid && oid->idLength >= 4);
 313     /* Map the IDs to an IP address in little-endian order */
 314     return (BYTE)oid->ids[3] << 24 | (BYTE)oid->ids[2] << 16 |
 315         (BYTE)oid->ids[1] << 8 | (BYTE)oid->ids[0];
 316 }
 317
 318 typedef void (*oidToKeyFunc)(AsnObjectIdentifier *oid, void *dst);
 319 typedef int (*compareFunc)(const void *key, const void *value);
 320
 321 /* Finds the first value in the table that matches key.  Returns its 1-based
 322  * index if found, or 0 if not found.
 323  */
 324 static UINT findValueInTable(const void *key,
 325     struct GenericTable *table, size_t tableEntrySize, compareFunc compare)
 326 {
 327     UINT index = 0;
 328     void *value;
 329
 330     value = bsearch(key, table->entries, table->numEntries, tableEntrySize,
 331         compare);
 332     if (value)
 333         index = ((BYTE *)value - (BYTE *)table->entries) / tableEntrySize + 1;
 334     return index;
 335 }
 336
 337 /* Finds the first value in the table that matches oid, using makeKey to
 338  * convert the oid to a key for comparison.  Returns the value's 1-based
 339  * index if found, or 0 if not found.
 340  */
 341 static UINT findOidInTable(AsnObjectIdentifier *oid,
 342     struct GenericTable *table, size_t tableEntrySize, oidToKeyFunc makeKey,
 343     compareFunc compare)
 344 {
 345     UINT index = 0;
 346     void *key = HeapAlloc(GetProcessHeap(), 0, tableEntrySize);
 347
 348     if (key)
 349     {
 350         makeKey(oid, key);
 351         index = findValueInTable(key, table, tableEntrySize, compare);
 352         HeapFree(GetProcessHeap(), 0, key);
 353     }
 354     return index;
 355 }
 356
 357 /* Finds the first successor to the value in the table that does matches oid,
 358  * using makeKey to convert the oid to a key for comparison.  A successor is
 359  * a value that does not match oid, so if multiple entries match an oid, only
 360  * the first will ever be returned using this method.
 361  * Returns the successor's 1-based index if found, or 0 if not found.
 362  */
 363 static UINT findNextOidInTable(AsnObjectIdentifier *oid,
 364     struct GenericTable *table, size_t tableEntrySize, oidToKeyFunc makeKey,
 365     compareFunc compare)
 366 {
 367     UINT index = 0;
 368     void *key = HeapAlloc(GetProcessHeap(), 0, tableEntrySize);
 369
 370     if (key)
 371     {
 372         makeKey(oid, key);
 373         index = findValueInTable(key, table, tableEntrySize, compare);
 374         if (index == 0)
 375         {
 376             /* Not found in table.  If it's less than the first entry, return
 377              * the first index.  Otherwise just return 0 and let the caller
 378              * handle finding the successor.
 379              */
 380             if (compare(key, table->entries) < 0)
 381                 index = 1;
 382         }
 383         else
 384         {
 385             /* Skip any entries that match the same key.  This enumeration will
 386              * be incomplete, but it's what Windows appears to do if there are
 387              * multiple entries with the same index in a table, and it avoids
 388              * an infinite loop.
 389              */
 390             for (++index; index <= table->numEntries && compare(key,
 391                 &table->entries[tableEntrySize * (index - 1)]) == 0; ++index)
 392                 ;
 393         }
 394         HeapFree(GetProcessHeap(), 0, key);
 395     }
 396     return index;
 397 }
 398
 399 /* Given an OID and a base OID that it must begin with, finds the item and
 400  * element of the table whose value matches the instance from the OID.
 401  * The OID is converted to a key with the function makeKey, and compared
 402  * against entries in the table with the function compare.
 403  * If bPduType is not SNMP_PDU_GETNEXT and either the item or instance is
 404  * missing, returns SNMP_ERRORSTATUS_NOSUCHNAME.
 405  * If bPduType is SNMP_PDU_GETNEXT, returns the successor to the item and
 406  * instance, or item 1, instance 1 if either is missing.
 407  */
 408 static AsnInteger32 getItemAndInstanceFromTable(AsnObjectIdentifier *oid,
 409     AsnObjectIdentifier *base, UINT instanceLen, BYTE bPduType,
 410     struct GenericTable *table, size_t tableEntrySize, oidToKeyFunc makeKey,
 411     compareFunc compare, UINT *item, UINT *instance)
 412 {
 413     AsnInteger32 ret = SNMP_ERRORSTATUS_NOERROR;
 414
 415     if (!table)
 416         return SNMP_ERRORSTATUS_NOSUCHNAME;
 417
 418     switch (bPduType)
 419     {
 420     case SNMP_PDU_GETNEXT:
 421         if (SnmpUtilOidNCmp(oid, base, base->idLength) < 0)
 422         {
 423             /* Return the first item and instance from the table */
 424             *item = 1;
 425             *instance = 1;
 426         }
 427         else if (!SnmpUtilOidNCmp(oid, base, base->idLength) &&
 428             oid->idLength < base->idLength + instanceLen + 1)
 429         {
 430             /* Either the table or an item is specified, but the instance is
 431              * not.
 432              */
 433             *instance = 1;
 434             if (oid->idLength >= base->idLength + 1)
 435             {
 436                 *item = oid->ids[base->idLength];
 437                 if (!*item)
 438                     *item = 1;
 439             }
 440             else
 441                 *item = 1;
 442         }
 443         else if (!SnmpUtilOidNCmp(oid, base, base->idLength) &&
 444             oid->idLength == base->idLength + instanceLen + 1)
 445         {
 446             *item = oid->ids[base->idLength];
 447             if (!*item)
 448             {
 449                 *instance = 1;
 450                 *item = 1;
 451             }
 452             else
 453             {
 454                 AsnObjectIdentifier instanceOid = { instanceLen,
 455                     oid->ids + base->idLength + 1 };
 456
 457                 *instance = findNextOidInTable(&instanceOid, table,
 458                     tableEntrySize, makeKey, compare);
 459                 if (!*instance || *instance > table->numEntries)
 460                     ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 461             }
 462         }
 463         else
 464             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 465         break;
 466     default:
 467         if (!SnmpUtilOidNCmp(oid, base, base->idLength) &&
 468             oid->idLength == base->idLength + instanceLen + 1)
 469         {
 470             *item = oid->ids[base->idLength];
 471             if (!*item)
 472                 ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 473             else
 474             {
 475                 AsnObjectIdentifier instanceOid = { instanceLen,
 476                     oid->ids + base->idLength + 1 };
 477
 478                 *instance = findOidInTable(&instanceOid, table, tableEntrySize,
 479                     makeKey, compare);
 480                 if (!*instance)
 481                     ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 482             }
 483         }
 484         else
 485             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 486     }
 487     return ret;
 488 }
 489
 490 static INT setOidWithItem(AsnObjectIdentifier *dst, AsnObjectIdentifier *base,
 491     UINT item)
 492 {
 493     UINT id;
 494     AsnObjectIdentifier oid;
 495     INT ret;
 496
 497     SnmpUtilOidFree(dst);
 498     ret = SnmpUtilOidCpy(dst, base);
 499     if (ret)
 500     {
 501         oid.idLength = 1;
 502         oid.ids = &id;
 503         id = item;
 504         ret = SnmpUtilOidAppend(dst, &oid);
 505     }
 506     return ret;
 507 }
 508
 509 static INT setOidWithItemAndIpAddr(AsnObjectIdentifier *dst,
 510     AsnObjectIdentifier *base, UINT item, DWORD addr)
 511 {
 512     UINT id;
 513     BYTE *ptr;
 514     AsnObjectIdentifier oid;
 515     INT ret;
 516
 517     ret = setOidWithItem(dst, base, item);
 518     if (ret)
 519     {
 520         oid.idLength = 1;
 521         oid.ids = &id;
 522         for (ptr = (BYTE *)&addr; ret && ptr < (BYTE *)&addr + sizeof(DWORD);
 523          ptr++)
 524         {
 525             id = *ptr;
 526             ret = SnmpUtilOidAppend(dst, &oid);
 527         }
 528     }
 529     return ret;
 530 }
 531
 532 static INT setOidWithItemAndInteger(AsnObjectIdentifier *dst,
 533     AsnObjectIdentifier *base, UINT item, UINT instance)
 534 {
 535     AsnObjectIdentifier oid;
 536     INT ret;
 537
 538     ret = setOidWithItem(dst, base, item);
 539     if (ret)
 540     {
 541         oid.idLength = 1;
 542         oid.ids = &instance;
 543         ret = SnmpUtilOidAppend(dst, &oid);
 544     }
 545     return ret;
 546 }
 547
 548 static DWORD copyIfRowDescr(AsnAny *value, void *src)
 549 {
 550     PMIB_IFROW row = (PMIB_IFROW)((BYTE *)src -
 551                                   FIELD_OFFSET(MIB_IFROW, dwDescrLen));
 552     DWORD ret;
 553
 554     if (row->dwDescrLen)
 555     {
 556         setStringValue(value, ASN_OCTETSTRING, row->dwDescrLen, row->bDescr);
 557         ret = SNMP_ERRORSTATUS_NOERROR;
 558     }
 559     else
 560         ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 561     return ret;
 562 }
 563
 564 static DWORD copyIfRowPhysAddr(AsnAny *value, void *src)
 565 {
 566     PMIB_IFROW row = (PMIB_IFROW)((BYTE *)src -
 567                                   FIELD_OFFSET(MIB_IFROW, dwPhysAddrLen));
 568     DWORD ret;
 569
 570     if (row->dwPhysAddrLen)
 571     {
 572         setStringValue(value, ASN_OCTETSTRING, row->dwPhysAddrLen,
 573                        row->bPhysAddr);
 574         ret = SNMP_ERRORSTATUS_NOERROR;
 575     }
 576     else
 577         ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 578     return ret;
 579 }
 580
 581 static struct structToAsnValue mib2IfEntryMap[] = {
 582     { FIELD_OFFSET(MIB_IFROW, dwIndex), copyInt },
 583     { FIELD_OFFSET(MIB_IFROW, dwDescrLen), copyIfRowDescr },
 584     { FIELD_OFFSET(MIB_IFROW, dwType), copyInt },
 585     { FIELD_OFFSET(MIB_IFROW, dwMtu), copyInt },
 586     { FIELD_OFFSET(MIB_IFROW, dwSpeed), copyInt },
 587     { FIELD_OFFSET(MIB_IFROW, dwPhysAddrLen), copyIfRowPhysAddr },
 588     { FIELD_OFFSET(MIB_IFROW, dwAdminStatus), copyInt },
 589     { FIELD_OFFSET(MIB_IFROW, dwOperStatus), copyOperStatus },
 590     { FIELD_OFFSET(MIB_IFROW, dwLastChange), copyInt },
 591     { FIELD_OFFSET(MIB_IFROW, dwInOctets), copyInt },
 592     { FIELD_OFFSET(MIB_IFROW, dwInUcastPkts), copyInt },
 593     { FIELD_OFFSET(MIB_IFROW, dwInNUcastPkts), copyInt },
 594     { FIELD_OFFSET(MIB_IFROW, dwInDiscards), copyInt },
 595     { FIELD_OFFSET(MIB_IFROW, dwInErrors), copyInt },
 596     { FIELD_OFFSET(MIB_IFROW, dwInUnknownProtos), copyInt },
 597     { FIELD_OFFSET(MIB_IFROW, dwOutOctets), copyInt },
 598     { FIELD_OFFSET(MIB_IFROW, dwOutUcastPkts), copyInt },
 599     { FIELD_OFFSET(MIB_IFROW, dwOutNUcastPkts), copyInt },
 600     { FIELD_OFFSET(MIB_IFROW, dwOutDiscards), copyInt },
 601     { FIELD_OFFSET(MIB_IFROW, dwOutErrors), copyInt },
 602     { FIELD_OFFSET(MIB_IFROW, dwOutQLen), copyInt },
 603 };
 604
 605 static UINT mib2IfEntry[] = { 1,3,6,1,2,1,2,2,1 };
 606
 607 static BOOL mib2IfEntryQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 608     AsnInteger32 *pErrorStatus)
 609 {
 610     AsnObjectIdentifier entryOid = DEFINE_OID(mib2IfEntry);
 611     BOOL ret = TRUE;
 612
 613     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 614         pErrorStatus);
 615
 616     switch (bPduType)
 617     {
 618     case SNMP_PDU_GET:
 619     case SNMP_PDU_GETNEXT:
 620         if (!ifTable)
 621         {
 622             /* There is no interface present, so let the caller deal
 623              * with finding the successor.
 624              */
 625             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 626         }
 627         else
 628         {
 629             UINT tableIndex = 0, item = 0;
 630
 631             *pErrorStatus = getItemAndIntegerInstanceFromOid(&pVarBind->name,
 632                 &entryOid, bPduType, &item, &tableIndex);
 633             if (!*pErrorStatus)
 634             {
 635                 assert(tableIndex);
 636                 assert(item);
 637                 if (tableIndex > ifTable->dwNumEntries)
 638                     *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 639                 else
 640                 {
 641                     *pErrorStatus = mapStructEntryToValue(mib2IfEntryMap,
 642                         DEFINE_SIZEOF(mib2IfEntryMap),
 643                         &ifTable->table[tableIndex - 1], item, bPduType,
 644                         pVarBind);
 645                     if (bPduType == SNMP_PDU_GETNEXT)
 646                         ret = setOidWithItemAndInteger(&pVarBind->name,
 647                             &entryOid, item, tableIndex);
 648                 }
 649             }
 650         }
 651         break;
 652     case SNMP_PDU_SET:
 653         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 654         ret = FALSE;
 655         break;
 656     default:
 657         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 658         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 659     }
 660     return ret;
 661 }
 662
 663 static UINT mib2Ip[] = { 1,3,6,1,2,1,4 };
 664 static MIB_IPSTATS ipStats;
 665
 666 static void mib2IpStatsInit(void)
 667 {
 668     GetIpStatistics(&ipStats);
 669 }
 670
 671 static struct structToAsnValue mib2IpMap[] = {
 672     { FIELD_OFFSET(MIB_IPSTATS, dwForwarding), copyInt }, /* 1 */
 673     { FIELD_OFFSET(MIB_IPSTATS, dwDefaultTTL), copyInt }, /* 2 */
 674     { FIELD_OFFSET(MIB_IPSTATS, dwInReceives), copyInt }, /* 3 */
 675     { FIELD_OFFSET(MIB_IPSTATS, dwInHdrErrors), copyInt }, /* 4 */
 676     { FIELD_OFFSET(MIB_IPSTATS, dwInAddrErrors), copyInt }, /* 5 */
 677     { FIELD_OFFSET(MIB_IPSTATS, dwForwDatagrams), copyInt }, /* 6 */
 678     { FIELD_OFFSET(MIB_IPSTATS, dwInUnknownProtos), copyInt }, /* 7 */
 679     { FIELD_OFFSET(MIB_IPSTATS, dwInDiscards), copyInt }, /* 8 */
 680     { FIELD_OFFSET(MIB_IPSTATS, dwInDelivers), copyInt }, /* 9 */
 681     { FIELD_OFFSET(MIB_IPSTATS, dwOutRequests), copyInt }, /* 10 */
 682     { FIELD_OFFSET(MIB_IPSTATS, dwOutDiscards), copyInt }, /* 11 */
 683     { FIELD_OFFSET(MIB_IPSTATS, dwOutNoRoutes), copyInt }, /* 12 */
 684     { FIELD_OFFSET(MIB_IPSTATS, dwReasmTimeout), copyInt }, /* 13 */
 685     { FIELD_OFFSET(MIB_IPSTATS, dwReasmReqds), copyInt }, /* 14 */
 686     { FIELD_OFFSET(MIB_IPSTATS, dwReasmOks), copyInt }, /* 15 */
 687     { FIELD_OFFSET(MIB_IPSTATS, dwReasmFails), copyInt }, /* 16 */
 688     { FIELD_OFFSET(MIB_IPSTATS, dwFragOks), copyInt }, /* 17 */
 689     { FIELD_OFFSET(MIB_IPSTATS, dwFragFails), copyInt }, /* 18 */
 690     { FIELD_OFFSET(MIB_IPSTATS, dwFragCreates), copyInt }, /* 19 */
 691     { 0, NULL }, /* 20: not used, IP addr table */
 692     { 0, NULL }, /* 21: not used, route table */
 693     { 0, NULL }, /* 22: not used, net to media (ARP) table */
 694     { FIELD_OFFSET(MIB_IPSTATS, dwRoutingDiscards), copyInt }, /* 23 */
 695 };
 696
 697 static BOOL mib2IpStatsQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 698     AsnInteger32 *pErrorStatus)
 699 {
 700     AsnObjectIdentifier myOid = DEFINE_OID(mib2Ip);
 701     UINT item = 0;
 702     BOOL ret = TRUE;
 703
 704     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 705         pErrorStatus);
 706
 707     switch (bPduType)
 708     {
 709     case SNMP_PDU_GET:
 710     case SNMP_PDU_GETNEXT:
 711         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
 712             &item);
 713         if (!*pErrorStatus)
 714         {
 715             *pErrorStatus = mapStructEntryToValue(mib2IpMap,
 716                 DEFINE_SIZEOF(mib2IpMap), &ipStats, item, bPduType, pVarBind);
 717             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 718                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
 719         }
 720         break;
 721     case SNMP_PDU_SET:
 722         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 723         ret = FALSE;
 724         break;
 725     default:
 726         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 727         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 728     }
 729     return ret;
 730 }
 731
 732 static UINT mib2IpAddr[] = { 1,3,6,1,2,1,4,20,1 };
 733 static PMIB_IPADDRTABLE ipAddrTable;
 734
 735 static struct structToAsnValue mib2IpAddrMap[] = {
 736     { FIELD_OFFSET(MIB_IPADDRROW, dwAddr), copyIpAddr },
 737     { FIELD_OFFSET(MIB_IPADDRROW, dwIndex), copyInt },
 738     { FIELD_OFFSET(MIB_IPADDRROW, dwMask), copyIpAddr },
 739     { FIELD_OFFSET(MIB_IPADDRROW, dwBCastAddr), copyInt },
 740     { FIELD_OFFSET(MIB_IPADDRROW, dwReasmSize), copyInt },
 741 };
 742
 743 static void mib2IpAddrInit(void)
 744 {
 745     DWORD size = 0, ret = GetIpAddrTable(NULL, &size, TRUE);
 746
 747     if (ret == ERROR_INSUFFICIENT_BUFFER)
 748     {
 749         MIB_IPADDRTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 750         if (table)
 751         {
 752             if (!GetIpAddrTable(table, &size, TRUE)) ipAddrTable = table;
 753             else HeapFree(GetProcessHeap(), 0, table );
 754         }
 755     }
 756 }
 757
 758 static void mib2IpAddrCleanup(void)
 759 {
 760     HeapFree(GetProcessHeap(), 0, ipAddrTable);
 761 }
 762
 763 static void oidToIpAddrRow(AsnObjectIdentifier *oid, void *dst)
 764 {
 765     MIB_IPADDRROW *row = dst;
 766
 767     row->dwAddr = oidToIpAddr(oid);
 768 }
 769
 770 static int compareIpAddrRow(const void *a, const void *b)
 771 {
 772     const MIB_IPADDRROW *key = a, *value = b;
 773
 774     return key->dwAddr - value->dwAddr;
 775 }
 776
 777 static BOOL mib2IpAddrQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 778     AsnInteger32 *pErrorStatus)
 779 {
 780     AsnObjectIdentifier myOid = DEFINE_OID(mib2IpAddr);
 781     UINT tableIndex = 0, item = 0;
 782     BOOL ret = TRUE;
 783
 784     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 785         pErrorStatus);
 786
 787     switch (bPduType)
 788     {
 789     case SNMP_PDU_GET:
 790     case SNMP_PDU_GETNEXT:
 791         *pErrorStatus = getItemAndInstanceFromTable(&pVarBind->name,
 792             &myOid, 4, bPduType, (struct GenericTable *)ipAddrTable,
 793             sizeof(MIB_IPADDRROW), oidToIpAddrRow, compareIpAddrRow, &item,
 794             &tableIndex);
 795         if (!*pErrorStatus)
 796         {
 797             assert(tableIndex);
 798             assert(item);
 799             *pErrorStatus = mapStructEntryToValue(mib2IpAddrMap,
 800                 DEFINE_SIZEOF(mib2IpAddrMap),
 801                 &ipAddrTable->table[tableIndex - 1], item, bPduType, pVarBind);
 802             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 803                 ret = setOidWithItemAndIpAddr(&pVarBind->name, &myOid, item,
 804                     ipAddrTable->table[tableIndex - 1].dwAddr);
 805         }
 806         break;
 807     case SNMP_PDU_SET:
 808         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 809         ret = FALSE;
 810         break;
 811     default:
 812         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 813         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 814     }
 815     return ret;
 816 }
 817
 818 static UINT mib2IpRoute[] = { 1,3,6,1,2,1,4,21,1 };
 819 static PMIB_IPFORWARDTABLE ipRouteTable;
 820
 821 static struct structToAsnValue mib2IpRouteMap[] = {
 822     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardDest), copyIpAddr },
 823     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardIfIndex), copyInt },
 824     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric1), copyInt },
 825     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric2), copyInt },
 826     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric3), copyInt },
 827     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric4), copyInt },
 828     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardNextHop), copyIpAddr },
 829     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardType), copyInt },
 830     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardProto), copyInt },
 831     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardAge), copyInt },
 832     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMask), copyIpAddr },
 833     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric5), copyInt },
 834 };
 835
 836 static void mib2IpRouteInit(void)
 837 {
 838     DWORD size = 0, ret = GetIpForwardTable(NULL, &size, TRUE);
 839
 840     if (ret == ERROR_INSUFFICIENT_BUFFER)
 841     {
 842         MIB_IPFORWARDTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 843         if (table)
 844         {
 845             if (!GetIpForwardTable(table, &size, TRUE)) ipRouteTable = table;
 846             else HeapFree(GetProcessHeap(), 0, table );
 847         }
 848     }
 849 }
 850
 851 static void mib2IpRouteCleanup(void)
 852 {
 853     HeapFree(GetProcessHeap(), 0, ipRouteTable);
 854 }
 855
 856 static void oidToIpForwardRow(AsnObjectIdentifier *oid, void *dst)
 857 {
 858     MIB_IPFORWARDROW *row = dst;
 859
 860     row->dwForwardDest = oidToIpAddr(oid);
 861 }
 862
 863 static int compareIpForwardRow(const void *a, const void *b)
 864 {
 865     const MIB_IPFORWARDROW *key = a, *value = b;
 866
 867     return key->dwForwardDest - value->dwForwardDest;
 868 }
 869
 870 static BOOL mib2IpRouteQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 871     AsnInteger32 *pErrorStatus)
 872 {
 873     AsnObjectIdentifier myOid = DEFINE_OID(mib2IpRoute);
 874     UINT tableIndex = 0, item = 0;
 875     BOOL ret = TRUE;
 876
 877     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 878         pErrorStatus);
 879
 880     switch (bPduType)
 881     {
 882     case SNMP_PDU_GET:
 883     case SNMP_PDU_GETNEXT:
 884         *pErrorStatus = getItemAndInstanceFromTable(&pVarBind->name,
 885             &myOid, 4, bPduType, (struct GenericTable *)ipRouteTable,
 886             sizeof(MIB_IPFORWARDROW), oidToIpForwardRow, compareIpForwardRow,
 887             &item, &tableIndex);
 888         if (!*pErrorStatus)
 889         {
 890             assert(tableIndex);
 891             assert(item);
 892             *pErrorStatus = mapStructEntryToValue(mib2IpRouteMap,
 893                 DEFINE_SIZEOF(mib2IpRouteMap),
 894                 &ipRouteTable->table[tableIndex - 1], item, bPduType, pVarBind);
 895             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 896                 ret = setOidWithItemAndIpAddr(&pVarBind->name, &myOid, item,
 897                     ipRouteTable->table[tableIndex - 1].dwForwardDest);
 898         }
 899         break;
 900     case SNMP_PDU_SET:
 901         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 902         ret = FALSE;
 903         break;
 904     default:
 905         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 906         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 907     }
 908     return ret;
 909 }
 910
 911 static UINT mib2IpNet[] = { 1,3,6,1,2,1,4,22,1 };
 912 static PMIB_IPNETTABLE ipNetTable;
 913
 914 static DWORD copyIpNetPhysAddr(AsnAny *value, void *src)
 915 {
 916     PMIB_IPNETROW row = (PMIB_IPNETROW)((BYTE *)src - FIELD_OFFSET(MIB_IPNETROW,
 917                                         dwPhysAddrLen));
 918
 919     setStringValue(value, ASN_OCTETSTRING, row->dwPhysAddrLen, row->bPhysAddr);
 920     return SNMP_ERRORSTATUS_NOERROR;
 921 }
 922
 923 static struct structToAsnValue mib2IpNetMap[] = {
 924     { FIELD_OFFSET(MIB_IPNETROW, dwIndex), copyInt },
 925     { FIELD_OFFSET(MIB_IPNETROW, dwPhysAddrLen), copyIpNetPhysAddr },
 926     { FIELD_OFFSET(MIB_IPNETROW, dwAddr), copyIpAddr },
 927     { FIELD_OFFSET(MIB_IPNETROW, dwType), copyInt },
 928 };
 929
 930 static void mib2IpNetInit(void)
 931 {
 932     DWORD size = 0, ret = GetIpNetTable(NULL, &size, FALSE);
 933
 934     if (ret == ERROR_INSUFFICIENT_BUFFER)
 935     {
 936         MIB_IPNETTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 937         if (table)
 938         {
 939             if (!GetIpNetTable(table, &size, FALSE)) ipNetTable = table;
 940             else HeapFree(GetProcessHeap(), 0, table );
 941         }
 942     }
 943 }
 944
 945 static void mib2IpNetCleanup(void)
 946 {
 947     HeapFree(GetProcessHeap(), 0, ipNetTable);
 948 }
 949
 950 static BOOL mib2IpNetQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 951     AsnInteger32 *pErrorStatus)
 952 {
 953     AsnObjectIdentifier myOid = DEFINE_OID(mib2IpNet);
 954     BOOL ret = TRUE;
 955
 956     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 957         pErrorStatus);
 958
 959     switch (bPduType)
 960     {
 961     case SNMP_PDU_GET:
 962     case SNMP_PDU_GETNEXT:
 963         if (!ipNetTable)
 964             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 965         else
 966         {
 967             UINT tableIndex = 0, item = 0;
 968
 969             *pErrorStatus = getItemAndIntegerInstanceFromOid(&pVarBind->name,
 970                 &myOid, bPduType, &item, &tableIndex);
 971             if (!*pErrorStatus)
 972             {
 973                 assert(tableIndex);
 974                 assert(item);
 975                 if (tableIndex > ipNetTable->dwNumEntries)
 976                     *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 977                 else
 978                 {
 979                     *pErrorStatus = mapStructEntryToValue(mib2IpNetMap,
 980                         DEFINE_SIZEOF(mib2IpNetMap),
 981                         &ipNetTable[tableIndex - 1], item, bPduType, pVarBind);
 982                     if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 983                         ret = setOidWithItemAndInteger(&pVarBind->name, &myOid,
 984                             item, tableIndex);
 985                 }
 986             }
 987         }
 988         break;
 989     case SNMP_PDU_SET:
 990         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 991         ret = FALSE;
 992         break;
 993     default:
 994         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 995         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 996     }
 997     return ret;
 998 }
 999
1000 static UINT mib2Icmp[] = { 1,3,6,1,2,1,5 };
1001 static MIB_ICMP icmpStats;
1002
1003 static void mib2IcmpInit(void)
1004 {
1005     GetIcmpStatistics(&icmpStats);
1006 }
1007
1008 static struct structToAsnValue mib2IcmpMap[] = {
1009     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwMsgs), copyInt },
1010     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwErrors), copyInt },
1011     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwDestUnreachs), copyInt },
1012     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwTimeExcds), copyInt },
1013     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwParmProbs), copyInt },
1014     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwSrcQuenchs), copyInt },
1015     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwRedirects), copyInt },
1016     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwEchos), copyInt },
1017     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwEchoReps), copyInt },
1018     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwTimestamps), copyInt },
1019     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwTimestampReps), copyInt },
1020     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwAddrMasks), copyInt },
1021     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwAddrMaskReps), copyInt },
1022     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwMsgs), copyInt },
1023     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwErrors), copyInt },
1024     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwDestUnreachs), copyInt },
1025     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwTimeExcds), copyInt },
1026     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwParmProbs), copyInt },
1027     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwSrcQuenchs), copyInt },
1028     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwRedirects), copyInt },
1029     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwEchos), copyInt },
1030     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwEchoReps), copyInt },
1031     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwTimestamps), copyInt },
1032     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwTimestampReps), copyInt },
1033     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwAddrMasks), copyInt },
1034     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwAddrMaskReps), copyInt },
1035 };
1036
1037 static BOOL mib2IcmpQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1038     AsnInteger32 *pErrorStatus)
1039 {
1040     AsnObjectIdentifier myOid = DEFINE_OID(mib2Icmp);
1041     UINT item = 0;
1042     BOOL ret = TRUE;
1043
1044     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1045         pErrorStatus);
1046
1047     switch (bPduType)
1048     {
1049     case SNMP_PDU_GET:
1050     case SNMP_PDU_GETNEXT:
1051         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
1052             &item);
1053         if (!*pErrorStatus)
1054         {
1055             *pErrorStatus = mapStructEntryToValue(mib2IcmpMap,
1056                 DEFINE_SIZEOF(mib2IcmpMap), &icmpStats, item, bPduType,
1057                 pVarBind);
1058             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1059                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
1060         }
1061         break;
1062     case SNMP_PDU_SET:
1063         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1064         ret = FALSE;
1065         break;
1066     default:
1067         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1068         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1069     }
1070     return ret;
1071 }
1072
1073 static UINT mib2Tcp[] = { 1,3,6,1,2,1,6 };
1074 static MIB_TCPSTATS tcpStats;
1075
1076 static void mib2TcpInit(void)
1077 {
1078     GetTcpStatistics(&tcpStats);
1079 }
1080
1081 static struct structToAsnValue mib2TcpMap[] = {
1082     { FIELD_OFFSET(MIB_TCPSTATS, dwRtoAlgorithm), copyInt },
1083     { FIELD_OFFSET(MIB_TCPSTATS, dwRtoMin), copyInt },
1084     { FIELD_OFFSET(MIB_TCPSTATS, dwRtoMax), copyInt },
1085     { FIELD_OFFSET(MIB_TCPSTATS, dwMaxConn), copyInt },
1086     { FIELD_OFFSET(MIB_TCPSTATS, dwActiveOpens), copyInt },
1087     { FIELD_OFFSET(MIB_TCPSTATS, dwPassiveOpens), copyInt },
1088     { FIELD_OFFSET(MIB_TCPSTATS, dwAttemptFails), copyInt },
1089     { FIELD_OFFSET(MIB_TCPSTATS, dwEstabResets), copyInt },
1090     { FIELD_OFFSET(MIB_TCPSTATS, dwCurrEstab), copyInt },
1091     { FIELD_OFFSET(MIB_TCPSTATS, dwInSegs), copyInt },
1092     { FIELD_OFFSET(MIB_TCPSTATS, dwOutSegs), copyInt },
1093     { FIELD_OFFSET(MIB_TCPSTATS, dwRetransSegs), copyInt },
1094     { FIELD_OFFSET(MIB_TCPSTATS, dwInErrs), copyInt },
1095     { FIELD_OFFSET(MIB_TCPSTATS, dwOutRsts), copyInt },
1096     { FIELD_OFFSET(MIB_TCPSTATS, dwNumConns), copyInt },
1097 };
1098
1099 static BOOL mib2TcpQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1100     AsnInteger32 *pErrorStatus)
1101 {
1102     AsnObjectIdentifier myOid = DEFINE_OID(mib2Tcp);
1103     UINT item = 0;
1104     BOOL ret = TRUE;
1105
1106     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1107         pErrorStatus);
1108
1109     switch (bPduType)
1110     {
1111     case SNMP_PDU_GET:
1112     case SNMP_PDU_GETNEXT:
1113         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
1114             &item);
1115         if (!*pErrorStatus)
1116         {
1117             *pErrorStatus = mapStructEntryToValue(mib2TcpMap,
1118                 DEFINE_SIZEOF(mib2TcpMap), &tcpStats, item, bPduType, pVarBind);
1119             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1120                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
1121         }
1122         break;
1123     case SNMP_PDU_SET:
1124         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1125         ret = FALSE;
1126         break;
1127     default:
1128         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1129         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1130     }
1131     return ret;
1132 }
1133
1134 static UINT mib2Udp[] = { 1,3,6,1,2,1,7 };
1135 static MIB_UDPSTATS udpStats;
1136
1137 static void mib2UdpInit(void)
1138 {
1139     GetUdpStatistics(&udpStats);
1140 }
1141
1142 static struct structToAsnValue mib2UdpMap[] = {
1143     { FIELD_OFFSET(MIB_UDPSTATS, dwInDatagrams), copyInt },
1144     { FIELD_OFFSET(MIB_UDPSTATS, dwNoPorts), copyInt },
1145     { FIELD_OFFSET(MIB_UDPSTATS, dwInErrors), copyInt },
1146     { FIELD_OFFSET(MIB_UDPSTATS, dwOutDatagrams), copyInt },
1147 };
1148
1149 static BOOL mib2UdpQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1150     AsnInteger32 *pErrorStatus)
1151 {
1152     AsnObjectIdentifier myOid = DEFINE_OID(mib2Udp);
1153     UINT item;
1154     BOOL ret = TRUE;
1155
1156     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1157         pErrorStatus);
1158
1159     switch (bPduType)
1160     {
1161     case SNMP_PDU_GET:
1162     case SNMP_PDU_GETNEXT:
1163         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
1164             &item);
1165         if (!*pErrorStatus)
1166         {
1167             *pErrorStatus = mapStructEntryToValue(mib2UdpMap,
1168                 DEFINE_SIZEOF(mib2UdpMap), &udpStats, item, bPduType, pVarBind);
1169             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1170                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
1171         }
1172         break;
1173     case SNMP_PDU_SET:
1174         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1175         ret = FALSE;
1176         break;
1177     default:
1178         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1179         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1180     }
1181     return ret;
1182 }
1183
1184 static UINT mib2UdpEntry[] = { 1,3,6,1,2,1,7,5,1 };
1185 static PMIB_UDPTABLE udpTable;
1186
1187 static void mib2UdpEntryInit(void)
1188 {
1189     DWORD size = 0, ret = GetUdpTable(NULL, &size, TRUE);
1190
1191     if (ret == ERROR_INSUFFICIENT_BUFFER)
1192     {
1193         MIB_UDPTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
1194         if (table)
1195         {
1196             if (!GetUdpTable(table, &size, TRUE)) udpTable = table;
1197             else HeapFree(GetProcessHeap(), 0, table);
1198         }
1199     }
1200 }
1201
1202 static void mib2UdpEntryCleanup(void)
1203 {
1204     HeapFree(GetProcessHeap(), 0, udpTable);
1205 }
1206
1207 static struct structToAsnValue mib2UdpEntryMap[] = {
1208     { FIELD_OFFSET(MIB_UDPROW, dwLocalAddr), copyIpAddr },
1209     { FIELD_OFFSET(MIB_UDPROW, dwLocalPort), copyInt },
1210 };
1211
1212 static void oidToUdpRow(AsnObjectIdentifier *oid, void *dst)
1213 {
1214     MIB_UDPROW *row = dst;
1215
1216     assert(oid && oid->idLength >= 5);
1217     row->dwLocalAddr = oidToIpAddr(oid);
1218     row->dwLocalPort = oid->ids[4];
1219 }
1220
1221 static int compareUdpRow(const void *a, const void *b)
1222 {
1223     const MIB_UDPROW *key = a, *value = b;
1224     int ret;
1225
1226     ret = key->dwLocalAddr - value->dwLocalAddr;
1227     if (ret == 0)
1228         ret = key->dwLocalPort - value->dwLocalPort;
1229     return ret;
1230 }
1231
1232 static BOOL mib2UdpEntryQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1233     AsnInteger32 *pErrorStatus)
1234 {
1235     AsnObjectIdentifier myOid = DEFINE_OID(mib2UdpEntry);
1236     BOOL ret = TRUE;
1237
1238     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1239         pErrorStatus);
1240
1241     switch (bPduType)
1242     {
1243     case SNMP_PDU_GET:
1244     case SNMP_PDU_GETNEXT:
1245         if (!udpTable)
1246             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1247         else
1248         {
1249             UINT tableIndex = 0, item = 0;
1250
1251             *pErrorStatus = getItemAndInstanceFromTable(&pVarBind->name, &myOid,
1252                 5, bPduType, (struct GenericTable *)udpTable,
1253                 sizeof(MIB_UDPROW), oidToUdpRow, compareUdpRow, &item,
1254                 &tableIndex);
1255             if (!*pErrorStatus)
1256             {
1257                 assert(tableIndex);
1258                 assert(item);
1259                 *pErrorStatus = mapStructEntryToValue(mib2UdpEntryMap,
1260                     DEFINE_SIZEOF(mib2UdpEntryMap),
1261                     &udpTable->table[tableIndex - 1], item, bPduType, pVarBind);
1262                 if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1263                 {
1264                     AsnObjectIdentifier oid;
1265
1266                     ret = setOidWithItemAndIpAddr(&pVarBind->name, &myOid, item,
1267                         udpTable->table[tableIndex - 1].dwLocalAddr);
1268                     if (ret)
1269                     {
1270                         oid.idLength = 1;
1271                         oid.ids = &udpTable->table[tableIndex - 1].dwLocalPort;
1272                         ret = SnmpUtilOidAppend(&pVarBind->name, &oid);
1273                     }
1274                 }
1275             }
1276         }
1277         break;
1278     case SNMP_PDU_SET:
1279         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1280         ret = FALSE;
1281         break;
1282     default:
1283         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1284         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1285     }
1286     return ret;
1287 }
1288
1289 /* This list MUST BE lexicographically sorted */
1290 static struct mibImplementation supportedIDs[] = {
1291     { DEFINE_OID(mib2IfNumber), mib2IfNumberInit, mib2IfNumberQuery,
1292       mib2IfNumberCleanup },
1293     { DEFINE_OID(mib2IfEntry), NULL, mib2IfEntryQuery, NULL },
1294     { DEFINE_OID(mib2Ip), mib2IpStatsInit, mib2IpStatsQuery, NULL },
1295     { DEFINE_OID(mib2IpAddr), mib2IpAddrInit, mib2IpAddrQuery,
1296       mib2IpAddrCleanup },
1297     { DEFINE_OID(mib2IpRoute), mib2IpRouteInit, mib2IpRouteQuery,
1298       mib2IpRouteCleanup },
1299     { DEFINE_OID(mib2IpNet), mib2IpNetInit, mib2IpNetQuery, mib2IpNetCleanup },
1300     { DEFINE_OID(mib2Icmp), mib2IcmpInit, mib2IcmpQuery, NULL },
1301     { DEFINE_OID(mib2Tcp), mib2TcpInit, mib2TcpQuery, NULL },
1302     { DEFINE_OID(mib2Udp), mib2UdpInit, mib2UdpQuery, NULL },
1303     { DEFINE_OID(mib2UdpEntry), mib2UdpEntryInit, mib2UdpEntryQuery,
1304       mib2UdpEntryCleanup },
1305 };
1306 static UINT minSupportedIDLength;
1307
1308 /*****************************************************************************
1309  * SnmpExtensionInit [INETMIB1.@]
1310  */
1311 BOOL WINAPI SnmpExtensionInit(DWORD dwUptimeReference,
1312     HANDLE *phSubagentTrapEvent, AsnObjectIdentifier *pFirstSupportedRegion)
1313 {
1314     AsnObjectIdentifier myOid = DEFINE_OID(mib2System);
1315     UINT i;
1316
1317     TRACE("(%d, %p, %p)\n", dwUptimeReference, phSubagentTrapEvent,
1318         pFirstSupportedRegion);
1319
1320     minSupportedIDLength = UINT_MAX;
1321     for (i = 0; i < sizeof(supportedIDs) / sizeof(supportedIDs[0]); i++)
1322     {
1323         if (supportedIDs[i].init)
1324             supportedIDs[i].init();
1325         if (supportedIDs[i].name.idLength < minSupportedIDLength)
1326             minSupportedIDLength = supportedIDs[i].name.idLength;
1327     }
1328     *phSubagentTrapEvent = NULL;
1329     SnmpUtilOidCpy(pFirstSupportedRegion, &myOid);
1330     return TRUE;
1331 }
1332
1333 static void cleanup(void)
1334 {
1335     UINT i;
1336
1337     for (i = 0; i < sizeof(supportedIDs) / sizeof(supportedIDs[0]); i++)
1338         if (supportedIDs[i].cleanup)
1339             supportedIDs[i].cleanup();
1340 }
1341
1342 static struct mibImplementation *findSupportedQuery(UINT *ids, UINT idLength,
1343     UINT *matchingIndex)
1344 {
1345     int indexHigh = DEFINE_SIZEOF(supportedIDs) - 1, indexLow = 0, i;
1346     struct mibImplementation *impl = NULL;
1347     AsnObjectIdentifier oid1 = { idLength, ids};
1348
1349     if (!idLength)
1350         return NULL;
1351     for (i = (indexLow + indexHigh) / 2; !impl && indexLow <= indexHigh;
1352          i = (indexLow + indexHigh) / 2)
1353     {
1354         INT cmp;
1355
1356         cmp = SnmpUtilOidNCmp(&oid1, &supportedIDs[i].name, idLength);
1357         if (!cmp)
1358         {
1359             impl = &supportedIDs[i];
1360             *matchingIndex = i;
1361         }
1362         else if (cmp > 0)
1363             indexLow = i + 1;
1364         else
1365             indexHigh = i - 1;
1366     }
1367     return impl;
1368 }
1369
1370 /*****************************************************************************
1371  * SnmpExtensionQuery [INETMIB1.@]
1372  */
1373 BOOL WINAPI SnmpExtensionQuery(BYTE bPduType, SnmpVarBindList *pVarBindList,
1374     AsnInteger32 *pErrorStatus, AsnInteger32 *pErrorIndex)
1375 {
1376     AsnObjectIdentifier mib2oid = DEFINE_OID(mib2);
1377     AsnInteger32 error = SNMP_ERRORSTATUS_NOERROR, errorIndex = 0;
1378     UINT i;
1379     BOOL ret = TRUE;
1380
1381     TRACE("(0x%02x, %p, %p, %p)\n", bPduType, pVarBindList,
1382         pErrorStatus, pErrorIndex);
1383
1384     for (i = 0; !error && i < pVarBindList->len; i++)
1385     {
1386         /* Ignore any OIDs not in MIB2 */
1387         if (!SnmpUtilOidNCmp(&pVarBindList->list[i].name, &mib2oid,
1388             mib2oid.idLength))
1389         {
1390             struct mibImplementation *impl = NULL;
1391             UINT len, matchingIndex = 0;
1392
1393             TRACE("%s\n", SnmpUtilOidToA(&pVarBindList->list[i].name));
1394             /* Search for an implementation matching as many octets as possible
1395              */
1396             for (len = pVarBindList->list[i].name.idLength;
1397                 len >= minSupportedIDLength && !impl; len--)
1398                 impl = findSupportedQuery(pVarBindList->list[i].name.ids, len,
1399                     &matchingIndex);
1400             if (impl && impl->query)
1401                 ret = impl->query(bPduType, &pVarBindList->list[i], &error);
1402             else
1403                 error = SNMP_ERRORSTATUS_NOSUCHNAME;
1404             if (error == SNMP_ERRORSTATUS_NOSUCHNAME &&
1405                 bPduType == SNMP_PDU_GETNEXT)
1406             {
1407                 /* GetNext is special: it finds the successor to the given OID,
1408                  * so we have to continue until an implementation handles the
1409                  * query or we exhaust the table of supported OIDs.
1410                  */
1411                 for (matchingIndex++; error == SNMP_ERRORSTATUS_NOSUCHNAME &&
1412                     matchingIndex < DEFINE_SIZEOF(supportedIDs);
1413                     matchingIndex++)
1414                 {
1415                     error = SNMP_ERRORSTATUS_NOERROR;
1416                     impl = &supportedIDs[matchingIndex];
1417                     if (impl->query)
1418                         ret = impl->query(bPduType, &pVarBindList->list[i],
1419                             &error);
1420                     else
1421                         error = SNMP_ERRORSTATUS_NOSUCHNAME;
1422                 }
1423                 /* If the query still isn't resolved, set the OID to the
1424                  * successor to the last entry in the table.
1425                  */
1426                 if (error == SNMP_ERRORSTATUS_NOSUCHNAME)
1427                 {
1428                     SnmpUtilOidFree(&pVarBindList->list[i].name);
1429                     ret = SnmpUtilOidCpy(&pVarBindList->list[i].name,
1430                         &supportedIDs[matchingIndex - 1].name);
1431                     pVarBindList->list[i].name.ids[
1432                         pVarBindList->list[i].name.idLength - 1] += 1;
1433                 }
1434             }
1435             if (error)
1436                 errorIndex = i + 1;
1437         }
1438     }
1439     *pErrorStatus = error;
1440     *pErrorIndex = errorIndex;
1441     return ret;
1442 }
1443
1444 /*****************************************************************************
1445  * DllMain [INETMIB1.@]
1446  */
1447 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
1448 {
1449     TRACE("(0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
1450
1451     switch (fdwReason)
1452     {
1453         case DLL_PROCESS_ATTACH:
1454             DisableThreadLibraryCalls(hinstDLL);
1455             break;
1456         case DLL_PROCESS_DETACH:
1457             cleanup();
1458             break;
1459         default:
1460             break;
1461     }
1462
1463     return TRUE;
1464 }