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
  25 #define NONAMELESSUNION
  26
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "snmp.h"
  30 #include "iphlpapi.h"
  31 #include "wine/debug.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(inetmib1);
  34
  35 /**
  36  * Utility functions
  37  */
  38 static DWORD copyInt(AsnAny *value, void *src)
  39 {
  40     value->asnType = ASN_INTEGER;
  41     value->asnValue.number = *(DWORD *)src;
  42     return SNMP_ERRORSTATUS_NOERROR;
  43 }
  44
  45 static void setStringValue(AsnAny *value, BYTE type, DWORD len, BYTE *str)
  46 {
  47     AsnAny strValue;
  48
  49     strValue.asnType = type;
  50     strValue.asnValue.string.stream = str;
  51     strValue.asnValue.string.length = len;
  52     strValue.asnValue.string.dynamic = FALSE;
  53     SnmpUtilAsnAnyCpy(value, &strValue);
  54 }
  55
  56 typedef DWORD (*copyValueFunc)(AsnAny *value, void *src);
  57
  58 struct structToAsnValue
  59 {
  60     size_t        offset;
  61     copyValueFunc copy;
  62 };
  63
  64 static AsnInteger32 mapStructEntryToValue(struct structToAsnValue *map,
  65     UINT mapLen, void *record, UINT id, SnmpVarBind *pVarBind)
  66 {
  67     /* OIDs are 1-based */
  68     if (!id)
  69         return SNMP_ERRORSTATUS_NOSUCHNAME;
  70     --id;
  71     if (id >= mapLen)
  72         return SNMP_ERRORSTATUS_NOSUCHNAME;
  73     if (!map[id].copy)
  74         return SNMP_ERRORSTATUS_NOSUCHNAME;
  75     return map[id].copy(&pVarBind->value, (BYTE *)record + map[id].offset);
  76 }
  77
  78 static DWORD copyIpAddr(AsnAny *value, void *src)
  79 {
  80     setStringValue(value, ASN_IPADDRESS, sizeof(DWORD), src);
  81     return SNMP_ERRORSTATUS_NOERROR;
  82 }
  83
  84 static UINT mib2[] = { 1,3,6,1,2,1 };
  85 static UINT mib2System[] = { 1,3,6,1,2,1,1 };
  86
  87 typedef BOOL (*varqueryfunc)(BYTE bPduType, SnmpVarBind *pVarBind,
  88     AsnInteger32 *pErrorStatus);
  89
  90 struct mibImplementation
  91 {
  92     AsnObjectIdentifier name;
  93     void              (*init)(void);
  94     varqueryfunc        query;
  95     void              (*cleanup)(void);
  96 };
  97
  98 static UINT mib2IfNumber[] = { 1,3,6,1,2,1,2,1 };
  99 static PMIB_IFTABLE ifTable;
 100
 101 static void mib2IfNumberInit(void)
 102 {
 103     DWORD size = 0, ret = GetIfTable(NULL, &size, FALSE);
 104
 105     if (ret == ERROR_INSUFFICIENT_BUFFER)
 106     {
 107         MIB_IFTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 108         if (table)
 109         {
 110             if (!GetIfTable(table, &size, FALSE)) ifTable = table;
 111             else HeapFree(GetProcessHeap(), 0, table );
 112         }
 113     }
 114 }
 115
 116 static void mib2IfNumberCleanup(void)
 117 {
 118     HeapFree(GetProcessHeap(), 0, ifTable);
 119 }
 120
 121 static BOOL mib2IfNumberQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 122     AsnInteger32 *pErrorStatus)
 123 {
 124     AsnObjectIdentifier numberOid = DEFINE_OID(mib2IfNumber);
 125     BOOL ret = TRUE;
 126
 127     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 128         pErrorStatus);
 129
 130     switch (bPduType)
 131     {
 132     case SNMP_PDU_GET:
 133     case SNMP_PDU_GETNEXT:
 134         if ((bPduType == SNMP_PDU_GET &&
 135             !SnmpUtilOidNCmp(&pVarBind->name, &numberOid, numberOid.idLength))
 136             || SnmpUtilOidNCmp(&pVarBind->name, &numberOid, numberOid.idLength)
 137             < 0)
 138         {
 139             DWORD numIfs = ifTable ? ifTable->dwNumEntries : 0;
 140
 141             copyInt(&pVarBind->value, &numIfs);
 142             if (bPduType == SNMP_PDU_GETNEXT)
 143             {
 144                 SnmpUtilOidFree(&pVarBind->name);
 145                 SnmpUtilOidCpy(&pVarBind->name, &numberOid);
 146             }
 147             *pErrorStatus = SNMP_ERRORSTATUS_NOERROR;
 148         }
 149         else
 150         {
 151             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 152             /* Caller deals with OID if bPduType == SNMP_PDU_GETNEXT, so don't
 153              * need to set it here.
 154              */
 155         }
 156         break;
 157     case SNMP_PDU_SET:
 158         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 159         ret = FALSE;
 160         break;
 161     default:
 162         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 163         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 164     }
 165     return ret;
 166 }
 167
 168 static DWORD copyOperStatus(AsnAny *value, void *src)
 169 {
 170     value->asnType = ASN_INTEGER;
 171     /* The IPHlpApi definition of operational status differs from the MIB2 one,
 172      * so map it to the MIB2 value.
 173      */
 174     switch (*(DWORD *)src)
 175     {
 176     case MIB_IF_OPER_STATUS_OPERATIONAL:
 177         value->asnValue.number = MIB_IF_ADMIN_STATUS_UP;
 178         break;
 179     case MIB_IF_OPER_STATUS_CONNECTING:
 180     case MIB_IF_OPER_STATUS_CONNECTED:
 181         value->asnValue.number = MIB_IF_ADMIN_STATUS_TESTING;
 182         break;
 183     default:
 184         value->asnValue.number = MIB_IF_ADMIN_STATUS_DOWN;
 185     };
 186     return SNMP_ERRORSTATUS_NOERROR;
 187 }
 188
 189 /* Given an OID and a base OID that it must begin with, finds the item and
 190  * integer instance from the OID.  E.g., given an OID foo.1.2 and a base OID
 191  * foo, returns item 1 and instance 2.
 192  * If bPduType is not SNMP_PDU_GETNEXT and either the item or instance is
 193  * missing, returns SNMP_ERRORSTATUS_NOSUCHNAME.
 194  * If bPduType is SNMP_PDU_GETNEXT, returns the successor to the item and
 195  * instance, or item 1, instance 1 if either is missing.
 196  */
 197 static AsnInteger32 getItemAndIntegerInstanceFromOid(AsnObjectIdentifier *oid,
 198     AsnObjectIdentifier *base, BYTE bPduType, UINT *item, UINT *instance)
 199 {
 200     AsnInteger32 ret = SNMP_ERRORSTATUS_NOERROR;
 201
 202     switch (bPduType)
 203     {
 204     case SNMP_PDU_GETNEXT:
 205         if (SnmpUtilOidNCmp(oid, base, base->idLength) < 0)
 206         {
 207             *item = 1;
 208             *instance = 1;
 209         }
 210         else if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 211         {
 212             if (oid->idLength == base->idLength ||
 213                 oid->idLength == base->idLength + 1)
 214             {
 215                 /* Either the table or an item within the table is specified,
 216                  * but the instance is not.  Get the first instance.
 217                  */
 218                 *instance = 1;
 219                 if (oid->idLength == base->idLength + 1)
 220                     *item = oid->ids[base->idLength];
 221                 else
 222                     *item = 1;
 223             }
 224             else
 225             {
 226                 *item = oid->ids[base->idLength];
 227                 *instance = oid->ids[base->idLength + 1] + 1;
 228             }
 229         }
 230         else
 231             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 232         break;
 233     default:
 234         if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 235         {
 236             if (oid->idLength == base->idLength ||
 237                 oid->idLength == base->idLength + 1)
 238             {
 239                 /* Either the table or an item within the table is specified,
 240                  * but the instance is not.
 241                  */
 242                 ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 243             }
 244             else
 245             {
 246                 *item = oid->ids[base->idLength];
 247                 *instance = oid->ids[base->idLength + 1];
 248             }
 249         }
 250         else
 251             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 252     }
 253     return ret;
 254 }
 255
 256 /* Given an OID and a base OID that it must begin with, finds the item from the
 257  * OID.  E.g., given an OID foo.1 and a base OID foo, returns item 1.
 258  * If bPduType is not SNMP_PDU_GETNEXT and the item is missing, returns
 259  * SNMP_ERRORSTATUS_NOSUCHNAME.
 260  * If bPduType is SNMP_PDU_GETNEXT, returns the successor to the item, or item
 261  * 1 if the item is missing.
 262  */
 263 static AsnInteger32 getItemFromOid(AsnObjectIdentifier *oid,
 264     AsnObjectIdentifier *base, BYTE bPduType, UINT *item)
 265 {
 266     AsnInteger32 ret = SNMP_ERRORSTATUS_NOERROR;
 267
 268     switch (bPduType)
 269     {
 270     case SNMP_PDU_GETNEXT:
 271         if (SnmpUtilOidNCmp(oid, base, base->idLength) < 0)
 272             *item = 1;
 273         else if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 274         {
 275             if (oid->idLength == base->idLength)
 276             {
 277                 /* The item is missing, assume the first item */
 278                 *item = 1;
 279             }
 280             else
 281                 *item = oid->ids[base->idLength] + 1;
 282         }
 283         else
 284             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 285         break;
 286     default:
 287         if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 288         {
 289             if (oid->idLength == base->idLength)
 290             {
 291                 /* The item is missing */
 292                 ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 293             }
 294             else
 295             {
 296                 *item = oid->ids[base->idLength];
 297                 if (!*item)
 298                     ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 299             }
 300         }
 301         else
 302             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 303     }
 304     return ret;
 305 }
 306
 307 struct GenericTable
 308 {
 309     DWORD numEntries;
 310     BYTE  entries[1];
 311 };
 312
 313 static DWORD oidToIpAddr(AsnObjectIdentifier *oid)
 314 {
 315     assert(oid && oid->idLength >= 4);
 316     /* Map the IDs to an IP address in little-endian order */
 317     return (BYTE)oid->ids[3] << 24 | (BYTE)oid->ids[2] << 16 |
 318         (BYTE)oid->ids[1] << 8 | (BYTE)oid->ids[0];
 319 }
 320
 321 typedef void (*oidToKeyFunc)(AsnObjectIdentifier *oid, void *dst);
 322 typedef int (*compareFunc)(const void *key, const void *value);
 323
 324 /* Finds the first value in the table that matches key.  Returns its 1-based
 325  * index if found, or 0 if not found.
 326  */
 327 static UINT findValueInTable(const void *key,
 328     struct GenericTable *table, size_t tableEntrySize, compareFunc compare)
 329 {
 330     UINT index = 0;
 331     void *value;
 332
 333     value = bsearch(key, table->entries, table->numEntries, tableEntrySize,
 334         compare);
 335     if (value)
 336         index = ((BYTE *)value - (BYTE *)table->entries) / tableEntrySize + 1;
 337     return index;
 338 }
 339
 340 /* Finds the first value in the table that matches oid, using makeKey to
 341  * convert the oid to a key for comparison.  Returns the value's 1-based
 342  * index if found, or 0 if not found.
 343  */
 344 static UINT findOidInTable(AsnObjectIdentifier *oid,
 345     struct GenericTable *table, size_t tableEntrySize, oidToKeyFunc makeKey,
 346     compareFunc compare)
 347 {
 348     UINT index = 0;
 349     void *key = HeapAlloc(GetProcessHeap(), 0, tableEntrySize);
 350
 351     if (key)
 352     {
 353         makeKey(oid, key);
 354         index = findValueInTable(key, table, tableEntrySize, compare);
 355         HeapFree(GetProcessHeap(), 0, key);
 356     }
 357     return index;
 358 }
 359
 360 /* Finds the first successor to the value in the table that does matches oid,
 361  * using makeKey to convert the oid to a key for comparison.  A successor is
 362  * a value that does not match oid, so if multiple entries match an oid, only
 363  * the first will ever be returned using this method.
 364  * Returns the successor's 1-based index if found, or 0 if not found.
 365  */
 366 static UINT findNextOidInTable(AsnObjectIdentifier *oid,
 367     struct GenericTable *table, size_t tableEntrySize, oidToKeyFunc makeKey,
 368     compareFunc compare)
 369 {
 370     UINT index = 0;
 371     void *key = HeapAlloc(GetProcessHeap(), 0, tableEntrySize);
 372
 373     if (key)
 374     {
 375         makeKey(oid, key);
 376         index = findValueInTable(key, table, tableEntrySize, compare);
 377         if (index == 0)
 378         {
 379             /* Not found in table.  If it's less than the first entry, return
 380              * the first index.  Otherwise just return 0 and let the caller
 381              * handle finding the successor.
 382              */
 383             if (compare(key, table->entries) < 0)
 384                 index = 1;
 385         }
 386         else
 387         {
 388             /* Skip any entries that match the same key.  This enumeration will
 389              * be incomplete, but it's what Windows appears to do if there are
 390              * multiple entries with the same index in a table, and it avoids
 391              * an infinite loop.
 392              */
 393             for (++index; index <= table->numEntries && compare(key,
 394                 &table->entries[tableEntrySize * (index - 1)]) == 0; ++index)
 395                 ;
 396         }
 397         HeapFree(GetProcessHeap(), 0, key);
 398     }
 399     return index;
 400 }
 401
 402 /* Given an OID and a base OID that it must begin with, finds the item and
 403  * element of the table whose value matches the instance from the OID.
 404  * The OID is converted to a key with the function makeKey, and compared
 405  * against entries in the table with the function compare.
 406  * If bPduType is not SNMP_PDU_GETNEXT and either the item or instance is
 407  * missing, returns SNMP_ERRORSTATUS_NOSUCHNAME.
 408  * If bPduType is SNMP_PDU_GETNEXT, returns the successor to the item and
 409  * instance, or item 1, instance 1 if either is missing.
 410  */
 411 static AsnInteger32 getItemAndInstanceFromTable(AsnObjectIdentifier *oid,
 412     AsnObjectIdentifier *base, UINT instanceLen, BYTE bPduType,
 413     struct GenericTable *table, size_t tableEntrySize, oidToKeyFunc makeKey,
 414     compareFunc compare, UINT *item, UINT *instance)
 415 {
 416     AsnInteger32 ret = SNMP_ERRORSTATUS_NOERROR;
 417
 418     if (!table)
 419         return SNMP_ERRORSTATUS_NOSUCHNAME;
 420
 421     switch (bPduType)
 422     {
 423     case SNMP_PDU_GETNEXT:
 424         if (SnmpUtilOidNCmp(oid, base, base->idLength) < 0)
 425         {
 426             /* Return the first item and instance from the table */
 427             *item = 1;
 428             *instance = 1;
 429         }
 430         else if (!SnmpUtilOidNCmp(oid, base, base->idLength) &&
 431             oid->idLength < base->idLength + instanceLen + 1)
 432         {
 433             /* Either the table or an item is specified, but the instance is
 434              * not.
 435              */
 436             *instance = 1;
 437             if (oid->idLength >= base->idLength + 1)
 438             {
 439                 *item = oid->ids[base->idLength];
 440                 if (!*item)
 441                     *item = 1;
 442             }
 443             else
 444                 *item = 1;
 445         }
 446         else if (!SnmpUtilOidNCmp(oid, base, base->idLength) &&
 447             oid->idLength == base->idLength + instanceLen + 1)
 448         {
 449             *item = oid->ids[base->idLength];
 450             if (!*item)
 451             {
 452                 *instance = 1;
 453                 *item = 1;
 454             }
 455             else
 456             {
 457                 AsnObjectIdentifier instanceOid = { instanceLen,
 458                     oid->ids + base->idLength + 1 };
 459
 460                 *instance = findNextOidInTable(&instanceOid, table,
 461                     tableEntrySize, makeKey, compare);
 462                 if (!*instance || *instance > table->numEntries)
 463                     ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 464             }
 465         }
 466         else
 467             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 468         break;
 469     default:
 470         if (!SnmpUtilOidNCmp(oid, base, base->idLength) &&
 471             oid->idLength == base->idLength + instanceLen + 1)
 472         {
 473             *item = oid->ids[base->idLength];
 474             if (!*item)
 475                 ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 476             else
 477             {
 478                 AsnObjectIdentifier instanceOid = { instanceLen,
 479                     oid->ids + base->idLength + 1 };
 480
 481                 *instance = findOidInTable(&instanceOid, table, tableEntrySize,
 482                     makeKey, compare);
 483                 if (!*instance)
 484                     ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 485             }
 486         }
 487         else
 488             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 489     }
 490     return ret;
 491 }
 492
 493 static INT setOidWithItem(AsnObjectIdentifier *dst, AsnObjectIdentifier *base,
 494     UINT item)
 495 {
 496     UINT id;
 497     AsnObjectIdentifier oid;
 498     INT ret;
 499
 500     SnmpUtilOidFree(dst);
 501     ret = SnmpUtilOidCpy(dst, base);
 502     if (ret)
 503     {
 504         oid.idLength = 1;
 505         oid.ids = &id;
 506         id = item;
 507         ret = SnmpUtilOidAppend(dst, &oid);
 508     }
 509     return ret;
 510 }
 511
 512 static INT setOidWithItemAndIpAddr(AsnObjectIdentifier *dst,
 513     AsnObjectIdentifier *base, UINT item, DWORD addr)
 514 {
 515     UINT id;
 516     BYTE *ptr;
 517     AsnObjectIdentifier oid;
 518     INT ret;
 519
 520     ret = setOidWithItem(dst, base, item);
 521     if (ret)
 522     {
 523         oid.idLength = 1;
 524         oid.ids = &id;
 525         for (ptr = (BYTE *)&addr; ret && ptr < (BYTE *)&addr + sizeof(DWORD);
 526          ptr++)
 527         {
 528             id = *ptr;
 529             ret = SnmpUtilOidAppend(dst, &oid);
 530         }
 531     }
 532     return ret;
 533 }
 534
 535 static INT setOidWithItemAndInteger(AsnObjectIdentifier *dst,
 536     AsnObjectIdentifier *base, UINT item, UINT instance)
 537 {
 538     AsnObjectIdentifier oid;
 539     INT ret;
 540
 541     ret = setOidWithItem(dst, base, item);
 542     if (ret)
 543     {
 544         oid.idLength = 1;
 545         oid.ids = &instance;
 546         ret = SnmpUtilOidAppend(dst, &oid);
 547     }
 548     return ret;
 549 }
 550
 551 static DWORD copyIfRowDescr(AsnAny *value, void *src)
 552 {
 553     PMIB_IFROW row = (PMIB_IFROW)((BYTE *)src -
 554                                   FIELD_OFFSET(MIB_IFROW, dwDescrLen));
 555     DWORD ret;
 556
 557     if (row->dwDescrLen)
 558     {
 559         setStringValue(value, ASN_OCTETSTRING, row->dwDescrLen, row->bDescr);
 560         ret = SNMP_ERRORSTATUS_NOERROR;
 561     }
 562     else
 563         ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 564     return ret;
 565 }
 566
 567 static DWORD copyIfRowPhysAddr(AsnAny *value, void *src)
 568 {
 569     PMIB_IFROW row = (PMIB_IFROW)((BYTE *)src -
 570                                   FIELD_OFFSET(MIB_IFROW, dwPhysAddrLen));
 571     DWORD ret;
 572
 573     if (row->dwPhysAddrLen)
 574     {
 575         setStringValue(value, ASN_OCTETSTRING, row->dwPhysAddrLen,
 576                        row->bPhysAddr);
 577         ret = SNMP_ERRORSTATUS_NOERROR;
 578     }
 579     else
 580         ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 581     return ret;
 582 }
 583
 584 static struct structToAsnValue mib2IfEntryMap[] = {
 585     { FIELD_OFFSET(MIB_IFROW, dwIndex), copyInt },
 586     { FIELD_OFFSET(MIB_IFROW, dwDescrLen), copyIfRowDescr },
 587     { FIELD_OFFSET(MIB_IFROW, dwType), copyInt },
 588     { FIELD_OFFSET(MIB_IFROW, dwMtu), copyInt },
 589     { FIELD_OFFSET(MIB_IFROW, dwSpeed), copyInt },
 590     { FIELD_OFFSET(MIB_IFROW, dwPhysAddrLen), copyIfRowPhysAddr },
 591     { FIELD_OFFSET(MIB_IFROW, dwAdminStatus), copyInt },
 592     { FIELD_OFFSET(MIB_IFROW, dwOperStatus), copyOperStatus },
 593     { FIELD_OFFSET(MIB_IFROW, dwLastChange), copyInt },
 594     { FIELD_OFFSET(MIB_IFROW, dwInOctets), copyInt },
 595     { FIELD_OFFSET(MIB_IFROW, dwInUcastPkts), copyInt },
 596     { FIELD_OFFSET(MIB_IFROW, dwInNUcastPkts), copyInt },
 597     { FIELD_OFFSET(MIB_IFROW, dwInDiscards), copyInt },
 598     { FIELD_OFFSET(MIB_IFROW, dwInErrors), copyInt },
 599     { FIELD_OFFSET(MIB_IFROW, dwInUnknownProtos), copyInt },
 600     { FIELD_OFFSET(MIB_IFROW, dwOutOctets), copyInt },
 601     { FIELD_OFFSET(MIB_IFROW, dwOutUcastPkts), copyInt },
 602     { FIELD_OFFSET(MIB_IFROW, dwOutNUcastPkts), copyInt },
 603     { FIELD_OFFSET(MIB_IFROW, dwOutDiscards), copyInt },
 604     { FIELD_OFFSET(MIB_IFROW, dwOutErrors), copyInt },
 605     { FIELD_OFFSET(MIB_IFROW, dwOutQLen), copyInt },
 606 };
 607
 608 static UINT mib2IfEntry[] = { 1,3,6,1,2,1,2,2,1 };
 609
 610 static BOOL mib2IfEntryQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 611     AsnInteger32 *pErrorStatus)
 612 {
 613     AsnObjectIdentifier entryOid = DEFINE_OID(mib2IfEntry);
 614     BOOL ret = TRUE;
 615
 616     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 617         pErrorStatus);
 618
 619     switch (bPduType)
 620     {
 621     case SNMP_PDU_GET:
 622     case SNMP_PDU_GETNEXT:
 623         if (!ifTable)
 624         {
 625             /* There is no interface present, so let the caller deal
 626              * with finding the successor.
 627              */
 628             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 629         }
 630         else
 631         {
 632             UINT tableIndex = 0, item = 0;
 633
 634             *pErrorStatus = getItemAndIntegerInstanceFromOid(&pVarBind->name,
 635                 &entryOid, bPduType, &item, &tableIndex);
 636             if (!*pErrorStatus)
 637             {
 638                 assert(tableIndex);
 639                 assert(item);
 640                 if (tableIndex > ifTable->dwNumEntries)
 641                     *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 642                 else
 643                 {
 644                     *pErrorStatus = mapStructEntryToValue(mib2IfEntryMap,
 645                         DEFINE_SIZEOF(mib2IfEntryMap),
 646                         &ifTable->table[tableIndex - 1], item,
 647                         pVarBind);
 648                     if (bPduType == SNMP_PDU_GETNEXT)
 649                         ret = setOidWithItemAndInteger(&pVarBind->name,
 650                             &entryOid, item, tableIndex);
 651                 }
 652             }
 653         }
 654         break;
 655     case SNMP_PDU_SET:
 656         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 657         ret = FALSE;
 658         break;
 659     default:
 660         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 661         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 662     }
 663     return ret;
 664 }
 665
 666 static UINT mib2Ip[] = { 1,3,6,1,2,1,4 };
 667 static MIB_IPSTATS ipStats;
 668
 669 static void mib2IpStatsInit(void)
 670 {
 671     GetIpStatistics(&ipStats);
 672 }
 673
 674 static struct structToAsnValue mib2IpMap[] = {
 675     { FIELD_OFFSET(MIB_IPSTATS, u.dwForwarding), copyInt }, /* 1 */
 676     { FIELD_OFFSET(MIB_IPSTATS, dwDefaultTTL), copyInt }, /* 2 */
 677     { FIELD_OFFSET(MIB_IPSTATS, dwInReceives), copyInt }, /* 3 */
 678     { FIELD_OFFSET(MIB_IPSTATS, dwInHdrErrors), copyInt }, /* 4 */
 679     { FIELD_OFFSET(MIB_IPSTATS, dwInAddrErrors), copyInt }, /* 5 */
 680     { FIELD_OFFSET(MIB_IPSTATS, dwForwDatagrams), copyInt }, /* 6 */
 681     { FIELD_OFFSET(MIB_IPSTATS, dwInUnknownProtos), copyInt }, /* 7 */
 682     { FIELD_OFFSET(MIB_IPSTATS, dwInDiscards), copyInt }, /* 8 */
 683     { FIELD_OFFSET(MIB_IPSTATS, dwInDelivers), copyInt }, /* 9 */
 684     { FIELD_OFFSET(MIB_IPSTATS, dwOutRequests), copyInt }, /* 10 */
 685     { FIELD_OFFSET(MIB_IPSTATS, dwOutDiscards), copyInt }, /* 11 */
 686     { FIELD_OFFSET(MIB_IPSTATS, dwOutNoRoutes), copyInt }, /* 12 */
 687     { FIELD_OFFSET(MIB_IPSTATS, dwReasmTimeout), copyInt }, /* 13 */
 688     { FIELD_OFFSET(MIB_IPSTATS, dwReasmReqds), copyInt }, /* 14 */
 689     { FIELD_OFFSET(MIB_IPSTATS, dwReasmOks), copyInt }, /* 15 */
 690     { FIELD_OFFSET(MIB_IPSTATS, dwReasmFails), copyInt }, /* 16 */
 691     { FIELD_OFFSET(MIB_IPSTATS, dwFragOks), copyInt }, /* 17 */
 692     { FIELD_OFFSET(MIB_IPSTATS, dwFragFails), copyInt }, /* 18 */
 693     { FIELD_OFFSET(MIB_IPSTATS, dwFragCreates), copyInt }, /* 19 */
 694     { 0, NULL }, /* 20: not used, IP addr table */
 695     { 0, NULL }, /* 21: not used, route table */
 696     { 0, NULL }, /* 22: not used, net to media (ARP) table */
 697     { FIELD_OFFSET(MIB_IPSTATS, dwRoutingDiscards), copyInt }, /* 23 */
 698 };
 699
 700 static BOOL mib2IpStatsQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 701     AsnInteger32 *pErrorStatus)
 702 {
 703     AsnObjectIdentifier myOid = DEFINE_OID(mib2Ip);
 704     UINT item = 0;
 705     BOOL ret = TRUE;
 706
 707     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 708         pErrorStatus);
 709
 710     switch (bPduType)
 711     {
 712     case SNMP_PDU_GET:
 713     case SNMP_PDU_GETNEXT:
 714         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
 715             &item);
 716         if (!*pErrorStatus)
 717         {
 718             *pErrorStatus = mapStructEntryToValue(mib2IpMap,
 719                 DEFINE_SIZEOF(mib2IpMap), &ipStats, item, pVarBind);
 720             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 721                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
 722         }
 723         break;
 724     case SNMP_PDU_SET:
 725         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 726         ret = FALSE;
 727         break;
 728     default:
 729         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 730         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 731     }
 732     return ret;
 733 }
 734
 735 static UINT mib2IpAddr[] = { 1,3,6,1,2,1,4,20,1 };
 736 static PMIB_IPADDRTABLE ipAddrTable;
 737
 738 static struct structToAsnValue mib2IpAddrMap[] = {
 739     { FIELD_OFFSET(MIB_IPADDRROW, dwAddr), copyIpAddr },
 740     { FIELD_OFFSET(MIB_IPADDRROW, dwIndex), copyInt },
 741     { FIELD_OFFSET(MIB_IPADDRROW, dwMask), copyIpAddr },
 742     { FIELD_OFFSET(MIB_IPADDRROW, dwBCastAddr), copyInt },
 743     { FIELD_OFFSET(MIB_IPADDRROW, dwReasmSize), copyInt },
 744 };
 745
 746 static void mib2IpAddrInit(void)
 747 {
 748     DWORD size = 0, ret = GetIpAddrTable(NULL, &size, TRUE);
 749
 750     if (ret == ERROR_INSUFFICIENT_BUFFER)
 751     {
 752         MIB_IPADDRTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 753         if (table)
 754         {
 755             if (!GetIpAddrTable(table, &size, TRUE)) ipAddrTable = table;
 756             else HeapFree(GetProcessHeap(), 0, table );
 757         }
 758     }
 759 }
 760
 761 static void mib2IpAddrCleanup(void)
 762 {
 763     HeapFree(GetProcessHeap(), 0, ipAddrTable);
 764 }
 765
 766 static void oidToIpAddrRow(AsnObjectIdentifier *oid, void *dst)
 767 {
 768     MIB_IPADDRROW *row = dst;
 769
 770     row->dwAddr = oidToIpAddr(oid);
 771 }
 772
 773 static int compareIpAddrRow(const void *a, const void *b)
 774 {
 775     const MIB_IPADDRROW *key = a, *value = b;
 776
 777     return key->dwAddr - value->dwAddr;
 778 }
 779
 780 static BOOL mib2IpAddrQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 781     AsnInteger32 *pErrorStatus)
 782 {
 783     AsnObjectIdentifier myOid = DEFINE_OID(mib2IpAddr);
 784     UINT tableIndex = 0, item = 0;
 785     BOOL ret = TRUE;
 786
 787     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 788         pErrorStatus);
 789
 790     switch (bPduType)
 791     {
 792     case SNMP_PDU_GET:
 793     case SNMP_PDU_GETNEXT:
 794         *pErrorStatus = getItemAndInstanceFromTable(&pVarBind->name,
 795             &myOid, 4, bPduType, (struct GenericTable *)ipAddrTable,
 796             sizeof(MIB_IPADDRROW), oidToIpAddrRow, compareIpAddrRow, &item,
 797             &tableIndex);
 798         if (!*pErrorStatus)
 799         {
 800             assert(tableIndex);
 801             assert(item);
 802             *pErrorStatus = mapStructEntryToValue(mib2IpAddrMap,
 803                 DEFINE_SIZEOF(mib2IpAddrMap),
 804                 &ipAddrTable->table[tableIndex - 1], item, pVarBind);
 805             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 806                 ret = setOidWithItemAndIpAddr(&pVarBind->name, &myOid, item,
 807                     ipAddrTable->table[tableIndex - 1].dwAddr);
 808         }
 809         break;
 810     case SNMP_PDU_SET:
 811         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 812         ret = FALSE;
 813         break;
 814     default:
 815         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 816         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 817     }
 818     return ret;
 819 }
 820
 821 static UINT mib2IpRoute[] = { 1,3,6,1,2,1,4,21,1 };
 822 static PMIB_IPFORWARDTABLE ipRouteTable;
 823
 824 static struct structToAsnValue mib2IpRouteMap[] = {
 825     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardDest), copyIpAddr },
 826     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardIfIndex), copyInt },
 827     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric1), copyInt },
 828     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric2), copyInt },
 829     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric3), copyInt },
 830     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric4), copyInt },
 831     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardNextHop), copyIpAddr },
 832     { FIELD_OFFSET(MIB_IPFORWARDROW, u1.dwForwardType), copyInt },
 833     { FIELD_OFFSET(MIB_IPFORWARDROW, u2.dwForwardProto), copyInt },
 834     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardAge), copyInt },
 835     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMask), copyIpAddr },
 836     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric5), copyInt },
 837 };
 838
 839 static void mib2IpRouteInit(void)
 840 {
 841     DWORD size = 0, ret = GetIpForwardTable(NULL, &size, TRUE);
 842
 843     if (ret == ERROR_INSUFFICIENT_BUFFER)
 844     {
 845         MIB_IPFORWARDTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 846         if (table)
 847         {
 848             if (!GetIpForwardTable(table, &size, TRUE)) ipRouteTable = table;
 849             else HeapFree(GetProcessHeap(), 0, table );
 850         }
 851     }
 852 }
 853
 854 static void mib2IpRouteCleanup(void)
 855 {
 856     HeapFree(GetProcessHeap(), 0, ipRouteTable);
 857 }
 858
 859 static void oidToIpForwardRow(AsnObjectIdentifier *oid, void *dst)
 860 {
 861     MIB_IPFORWARDROW *row = dst;
 862
 863     row->dwForwardDest = oidToIpAddr(oid);
 864 }
 865
 866 static int compareIpForwardRow(const void *a, const void *b)
 867 {
 868     const MIB_IPFORWARDROW *key = a, *value = b;
 869
 870     return key->dwForwardDest - value->dwForwardDest;
 871 }
 872
 873 static BOOL mib2IpRouteQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 874     AsnInteger32 *pErrorStatus)
 875 {
 876     AsnObjectIdentifier myOid = DEFINE_OID(mib2IpRoute);
 877     UINT tableIndex = 0, item = 0;
 878     BOOL ret = TRUE;
 879
 880     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 881         pErrorStatus);
 882
 883     switch (bPduType)
 884     {
 885     case SNMP_PDU_GET:
 886     case SNMP_PDU_GETNEXT:
 887         *pErrorStatus = getItemAndInstanceFromTable(&pVarBind->name,
 888             &myOid, 4, bPduType, (struct GenericTable *)ipRouteTable,
 889             sizeof(MIB_IPFORWARDROW), oidToIpForwardRow, compareIpForwardRow,
 890             &item, &tableIndex);
 891         if (!*pErrorStatus)
 892         {
 893             assert(tableIndex);
 894             assert(item);
 895             *pErrorStatus = mapStructEntryToValue(mib2IpRouteMap,
 896                 DEFINE_SIZEOF(mib2IpRouteMap),
 897                 &ipRouteTable->table[tableIndex - 1], item, pVarBind);
 898             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 899                 ret = setOidWithItemAndIpAddr(&pVarBind->name, &myOid, item,
 900                     ipRouteTable->table[tableIndex - 1].dwForwardDest);
 901         }
 902         break;
 903     case SNMP_PDU_SET:
 904         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 905         ret = FALSE;
 906         break;
 907     default:
 908         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 909         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 910     }
 911     return ret;
 912 }
 913
 914 static UINT mib2IpNet[] = { 1,3,6,1,2,1,4,22,1 };
 915 static PMIB_IPNETTABLE ipNetTable;
 916
 917 static DWORD copyIpNetPhysAddr(AsnAny *value, void *src)
 918 {
 919     PMIB_IPNETROW row = (PMIB_IPNETROW)((BYTE *)src - FIELD_OFFSET(MIB_IPNETROW,
 920                                         dwPhysAddrLen));
 921
 922     setStringValue(value, ASN_OCTETSTRING, row->dwPhysAddrLen, row->bPhysAddr);
 923     return SNMP_ERRORSTATUS_NOERROR;
 924 }
 925
 926 static struct structToAsnValue mib2IpNetMap[] = {
 927     { FIELD_OFFSET(MIB_IPNETROW, dwIndex), copyInt },
 928     { FIELD_OFFSET(MIB_IPNETROW, dwPhysAddrLen), copyIpNetPhysAddr },
 929     { FIELD_OFFSET(MIB_IPNETROW, dwAddr), copyIpAddr },
 930     { FIELD_OFFSET(MIB_IPNETROW, u.dwType), copyInt },
 931 };
 932
 933 static void mib2IpNetInit(void)
 934 {
 935     DWORD size = 0, ret = GetIpNetTable(NULL, &size, FALSE);
 936
 937     if (ret == ERROR_INSUFFICIENT_BUFFER)
 938     {
 939         MIB_IPNETTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 940         if (table)
 941         {
 942             if (!GetIpNetTable(table, &size, FALSE)) ipNetTable = table;
 943             else HeapFree(GetProcessHeap(), 0, table );
 944         }
 945     }
 946 }
 947
 948 static void mib2IpNetCleanup(void)
 949 {
 950     HeapFree(GetProcessHeap(), 0, ipNetTable);
 951 }
 952
 953 static BOOL mib2IpNetQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 954     AsnInteger32 *pErrorStatus)
 955 {
 956     AsnObjectIdentifier myOid = DEFINE_OID(mib2IpNet);
 957     BOOL ret = TRUE;
 958
 959     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 960         pErrorStatus);
 961
 962     switch (bPduType)
 963     {
 964     case SNMP_PDU_GET:
 965     case SNMP_PDU_GETNEXT:
 966         if (!ipNetTable)
 967             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 968         else
 969         {
 970             UINT tableIndex = 0, item = 0;
 971
 972             *pErrorStatus = getItemAndIntegerInstanceFromOid(&pVarBind->name,
 973                 &myOid, bPduType, &item, &tableIndex);
 974             if (!*pErrorStatus)
 975             {
 976                 assert(tableIndex);
 977                 assert(item);
 978                 if (tableIndex > ipNetTable->dwNumEntries)
 979                     *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 980                 else
 981                 {
 982                     *pErrorStatus = mapStructEntryToValue(mib2IpNetMap,
 983                         DEFINE_SIZEOF(mib2IpNetMap),
 984                         &ipNetTable[tableIndex - 1], item, pVarBind);
 985                     if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 986                         ret = setOidWithItemAndInteger(&pVarBind->name, &myOid,
 987                             item, tableIndex);
 988                 }
 989             }
 990         }
 991         break;
 992     case SNMP_PDU_SET:
 993         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 994         ret = FALSE;
 995         break;
 996     default:
 997         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 998         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 999     }
1000     return ret;
1001 }
1002
1003 static UINT mib2Icmp[] = { 1,3,6,1,2,1,5 };
1004 static MIB_ICMP icmpStats;
1005
1006 static void mib2IcmpInit(void)
1007 {
1008     GetIcmpStatistics(&icmpStats);
1009 }
1010
1011 static struct structToAsnValue mib2IcmpMap[] = {
1012     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwMsgs), copyInt },
1013     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwErrors), copyInt },
1014     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwDestUnreachs), copyInt },
1015     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwTimeExcds), copyInt },
1016     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwParmProbs), copyInt },
1017     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwSrcQuenchs), copyInt },
1018     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwRedirects), copyInt },
1019     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwEchos), copyInt },
1020     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwEchoReps), copyInt },
1021     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwTimestamps), copyInt },
1022     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwTimestampReps), copyInt },
1023     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwAddrMasks), copyInt },
1024     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwAddrMaskReps), copyInt },
1025     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwMsgs), copyInt },
1026     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwErrors), copyInt },
1027     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwDestUnreachs), copyInt },
1028     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwTimeExcds), copyInt },
1029     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwParmProbs), copyInt },
1030     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwSrcQuenchs), copyInt },
1031     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwRedirects), copyInt },
1032     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwEchos), copyInt },
1033     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwEchoReps), copyInt },
1034     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwTimestamps), copyInt },
1035     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwTimestampReps), copyInt },
1036     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwAddrMasks), copyInt },
1037     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwAddrMaskReps), copyInt },
1038 };
1039
1040 static BOOL mib2IcmpQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1041     AsnInteger32 *pErrorStatus)
1042 {
1043     AsnObjectIdentifier myOid = DEFINE_OID(mib2Icmp);
1044     UINT item = 0;
1045     BOOL ret = TRUE;
1046
1047     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1048         pErrorStatus);
1049
1050     switch (bPduType)
1051     {
1052     case SNMP_PDU_GET:
1053     case SNMP_PDU_GETNEXT:
1054         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
1055             &item);
1056         if (!*pErrorStatus)
1057         {
1058             *pErrorStatus = mapStructEntryToValue(mib2IcmpMap,
1059                 DEFINE_SIZEOF(mib2IcmpMap), &icmpStats, item,
1060                 pVarBind);
1061             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1062                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
1063         }
1064         break;
1065     case SNMP_PDU_SET:
1066         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1067         ret = FALSE;
1068         break;
1069     default:
1070         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1071         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1072     }
1073     return ret;
1074 }
1075
1076 static UINT mib2Tcp[] = { 1,3,6,1,2,1,6 };
1077 static MIB_TCPSTATS tcpStats;
1078
1079 static void mib2TcpInit(void)
1080 {
1081     GetTcpStatistics(&tcpStats);
1082 }
1083
1084 static struct structToAsnValue mib2TcpMap[] = {
1085     { FIELD_OFFSET(MIB_TCPSTATS, u.dwRtoAlgorithm), copyInt },
1086     { FIELD_OFFSET(MIB_TCPSTATS, dwRtoMin), copyInt },
1087     { FIELD_OFFSET(MIB_TCPSTATS, dwRtoMax), copyInt },
1088     { FIELD_OFFSET(MIB_TCPSTATS, dwMaxConn), copyInt },
1089     { FIELD_OFFSET(MIB_TCPSTATS, dwActiveOpens), copyInt },
1090     { FIELD_OFFSET(MIB_TCPSTATS, dwPassiveOpens), copyInt },
1091     { FIELD_OFFSET(MIB_TCPSTATS, dwAttemptFails), copyInt },
1092     { FIELD_OFFSET(MIB_TCPSTATS, dwEstabResets), copyInt },
1093     { FIELD_OFFSET(MIB_TCPSTATS, dwCurrEstab), copyInt },
1094     { FIELD_OFFSET(MIB_TCPSTATS, dwInSegs), copyInt },
1095     { FIELD_OFFSET(MIB_TCPSTATS, dwOutSegs), copyInt },
1096     { FIELD_OFFSET(MIB_TCPSTATS, dwRetransSegs), copyInt },
1097     { FIELD_OFFSET(MIB_TCPSTATS, dwInErrs), copyInt },
1098     { FIELD_OFFSET(MIB_TCPSTATS, dwOutRsts), copyInt },
1099     { FIELD_OFFSET(MIB_TCPSTATS, dwNumConns), copyInt },
1100 };
1101
1102 static BOOL mib2TcpQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1103     AsnInteger32 *pErrorStatus)
1104 {
1105     AsnObjectIdentifier myOid = DEFINE_OID(mib2Tcp);
1106     UINT item = 0;
1107     BOOL ret = TRUE;
1108
1109     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1110         pErrorStatus);
1111
1112     switch (bPduType)
1113     {
1114     case SNMP_PDU_GET:
1115     case SNMP_PDU_GETNEXT:
1116         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
1117             &item);
1118         if (!*pErrorStatus)
1119         {
1120             *pErrorStatus = mapStructEntryToValue(mib2TcpMap,
1121                 DEFINE_SIZEOF(mib2TcpMap), &tcpStats, item, pVarBind);
1122             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1123                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
1124         }
1125         break;
1126     case SNMP_PDU_SET:
1127         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1128         ret = FALSE;
1129         break;
1130     default:
1131         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1132         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1133     }
1134     return ret;
1135 }
1136
1137 static UINT mib2Udp[] = { 1,3,6,1,2,1,7 };
1138 static MIB_UDPSTATS udpStats;
1139
1140 static void mib2UdpInit(void)
1141 {
1142     GetUdpStatistics(&udpStats);
1143 }
1144
1145 static struct structToAsnValue mib2UdpMap[] = {
1146     { FIELD_OFFSET(MIB_UDPSTATS, dwInDatagrams), copyInt },
1147     { FIELD_OFFSET(MIB_UDPSTATS, dwNoPorts), copyInt },
1148     { FIELD_OFFSET(MIB_UDPSTATS, dwInErrors), copyInt },
1149     { FIELD_OFFSET(MIB_UDPSTATS, dwOutDatagrams), copyInt },
1150 };
1151
1152 static BOOL mib2UdpQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1153     AsnInteger32 *pErrorStatus)
1154 {
1155     AsnObjectIdentifier myOid = DEFINE_OID(mib2Udp);
1156     UINT item;
1157     BOOL ret = TRUE;
1158
1159     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1160         pErrorStatus);
1161
1162     switch (bPduType)
1163     {
1164     case SNMP_PDU_GET:
1165     case SNMP_PDU_GETNEXT:
1166         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
1167             &item);
1168         if (!*pErrorStatus)
1169         {
1170             *pErrorStatus = mapStructEntryToValue(mib2UdpMap,
1171                 DEFINE_SIZEOF(mib2UdpMap), &udpStats, item, pVarBind);
1172             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1173                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
1174         }
1175         break;
1176     case SNMP_PDU_SET:
1177         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1178         ret = FALSE;
1179         break;
1180     default:
1181         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1182         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1183     }
1184     return ret;
1185 }
1186
1187 static UINT mib2UdpEntry[] = { 1,3,6,1,2,1,7,5,1 };
1188 static PMIB_UDPTABLE udpTable;
1189
1190 static void mib2UdpEntryInit(void)
1191 {
1192     DWORD size = 0, ret = GetUdpTable(NULL, &size, TRUE);
1193
1194     if (ret == ERROR_INSUFFICIENT_BUFFER)
1195     {
1196         MIB_UDPTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
1197         if (table)
1198         {
1199             if (!GetUdpTable(table, &size, TRUE)) udpTable = table;
1200             else HeapFree(GetProcessHeap(), 0, table);
1201         }
1202     }
1203 }
1204
1205 static void mib2UdpEntryCleanup(void)
1206 {
1207     HeapFree(GetProcessHeap(), 0, udpTable);
1208 }
1209
1210 static struct structToAsnValue mib2UdpEntryMap[] = {
1211     { FIELD_OFFSET(MIB_UDPROW, dwLocalAddr), copyIpAddr },
1212     { FIELD_OFFSET(MIB_UDPROW, dwLocalPort), copyInt },
1213 };
1214
1215 static void oidToUdpRow(AsnObjectIdentifier *oid, void *dst)
1216 {
1217     MIB_UDPROW *row = dst;
1218
1219     assert(oid && oid->idLength >= 5);
1220     row->dwLocalAddr = oidToIpAddr(oid);
1221     row->dwLocalPort = oid->ids[4];
1222 }
1223
1224 static int compareUdpRow(const void *a, const void *b)
1225 {
1226     const MIB_UDPROW *key = a, *value = b;
1227     int ret;
1228
1229     ret = key->dwLocalAddr - value->dwLocalAddr;
1230     if (ret == 0)
1231         ret = key->dwLocalPort - value->dwLocalPort;
1232     return ret;
1233 }
1234
1235 static BOOL mib2UdpEntryQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1236     AsnInteger32 *pErrorStatus)
1237 {
1238     AsnObjectIdentifier myOid = DEFINE_OID(mib2UdpEntry);
1239     BOOL ret = TRUE;
1240
1241     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1242         pErrorStatus);
1243
1244     switch (bPduType)
1245     {
1246     case SNMP_PDU_GET:
1247     case SNMP_PDU_GETNEXT:
1248         if (!udpTable)
1249             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1250         else
1251         {
1252             UINT tableIndex = 0, item = 0;
1253
1254             *pErrorStatus = getItemAndInstanceFromTable(&pVarBind->name, &myOid,
1255                 5, bPduType, (struct GenericTable *)udpTable,
1256                 sizeof(MIB_UDPROW), oidToUdpRow, compareUdpRow, &item,
1257                 &tableIndex);
1258             if (!*pErrorStatus)
1259             {
1260                 assert(tableIndex);
1261                 assert(item);
1262                 *pErrorStatus = mapStructEntryToValue(mib2UdpEntryMap,
1263                     DEFINE_SIZEOF(mib2UdpEntryMap),
1264                     &udpTable->table[tableIndex - 1], item, pVarBind);
1265                 if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1266                 {
1267                     AsnObjectIdentifier oid;
1268
1269                     ret = setOidWithItemAndIpAddr(&pVarBind->name, &myOid, item,
1270                         udpTable->table[tableIndex - 1].dwLocalAddr);
1271                     if (ret)
1272                     {
1273                         oid.idLength = 1;
1274                         oid.ids = &udpTable->table[tableIndex - 1].dwLocalPort;
1275                         ret = SnmpUtilOidAppend(&pVarBind->name, &oid);
1276                     }
1277                 }
1278             }
1279         }
1280         break;
1281     case SNMP_PDU_SET:
1282         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1283         ret = FALSE;
1284         break;
1285     default:
1286         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1287         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1288     }
1289     return ret;
1290 }
1291
1292 /* This list MUST BE lexicographically sorted */
1293 static struct mibImplementation supportedIDs[] = {
1294     { DEFINE_OID(mib2IfNumber), mib2IfNumberInit, mib2IfNumberQuery,
1295       mib2IfNumberCleanup },
1296     { DEFINE_OID(mib2IfEntry), NULL, mib2IfEntryQuery, NULL },
1297     { DEFINE_OID(mib2Ip), mib2IpStatsInit, mib2IpStatsQuery, NULL },
1298     { DEFINE_OID(mib2IpAddr), mib2IpAddrInit, mib2IpAddrQuery,
1299       mib2IpAddrCleanup },
1300     { DEFINE_OID(mib2IpRoute), mib2IpRouteInit, mib2IpRouteQuery,
1301       mib2IpRouteCleanup },
1302     { DEFINE_OID(mib2IpNet), mib2IpNetInit, mib2IpNetQuery, mib2IpNetCleanup },
1303     { DEFINE_OID(mib2Icmp), mib2IcmpInit, mib2IcmpQuery, NULL },
1304     { DEFINE_OID(mib2Tcp), mib2TcpInit, mib2TcpQuery, NULL },
1305     { DEFINE_OID(mib2Udp), mib2UdpInit, mib2UdpQuery, NULL },
1306     { DEFINE_OID(mib2UdpEntry), mib2UdpEntryInit, mib2UdpEntryQuery,
1307       mib2UdpEntryCleanup },
1308 };
1309 static UINT minSupportedIDLength;
1310
1311 /*****************************************************************************
1312  * SnmpExtensionInit [INETMIB1.@]
1313  */
1314 BOOL WINAPI SnmpExtensionInit(DWORD dwUptimeReference,
1315     HANDLE *phSubagentTrapEvent, AsnObjectIdentifier *pFirstSupportedRegion)
1316 {
1317     AsnObjectIdentifier myOid = DEFINE_OID(mib2System);
1318     UINT i;
1319
1320     TRACE("(%d, %p, %p)\n", dwUptimeReference, phSubagentTrapEvent,
1321         pFirstSupportedRegion);
1322
1323     minSupportedIDLength = UINT_MAX;
1324     for (i = 0; i < sizeof(supportedIDs) / sizeof(supportedIDs[0]); i++)
1325     {
1326         if (supportedIDs[i].init)
1327             supportedIDs[i].init();
1328         if (supportedIDs[i].name.idLength < minSupportedIDLength)
1329             minSupportedIDLength = supportedIDs[i].name.idLength;
1330     }
1331     *phSubagentTrapEvent = NULL;
1332     SnmpUtilOidCpy(pFirstSupportedRegion, &myOid);
1333     return TRUE;
1334 }
1335
1336 static void cleanup(void)
1337 {
1338     UINT i;
1339
1340     for (i = 0; i < sizeof(supportedIDs) / sizeof(supportedIDs[0]); i++)
1341         if (supportedIDs[i].cleanup)
1342             supportedIDs[i].cleanup();
1343 }
1344
1345 static struct mibImplementation *findSupportedQuery(UINT *ids, UINT idLength,
1346     UINT *matchingIndex)
1347 {
1348     int indexHigh = DEFINE_SIZEOF(supportedIDs) - 1, indexLow = 0;
1349     AsnObjectIdentifier oid1 = { idLength, ids};
1350
1351     if (!idLength)
1352         return NULL;
1353
1354     while (indexLow <= indexHigh)
1355     {
1356         INT cmp, i = (indexLow + indexHigh) / 2;
1357         if (!(cmp = SnmpUtilOidNCmp(&oid1, &supportedIDs[i].name, idLength)))
1358         {
1359             *matchingIndex = i;
1360             return &supportedIDs[i];
1361         }
1362         if (cmp > 0)
1363             indexLow = i + 1;
1364         else
1365             indexHigh = i - 1;
1366     }
1367     return NULL;
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             if (lpvReserved) break;
1458             cleanup();
1459             break;
1460     }
1461
1462     return TRUE;
1463 }