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 <assert.h>
  20 #include <stdarg.h>
  21 #include <stdlib.h>
  22 #include <limits.h>
  23
  24 #define NONAMELESSUNION
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "snmp.h"
  29 #include "iphlpapi.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(inetmib1);
  33
  34 /**
  35  * Utility functions
  36  */
  37 static DWORD copyInt(AsnAny *value, void *src)
  38 {
  39     value->asnType = ASN_INTEGER;
  40     value->asnValue.number = *(DWORD *)src;
  41     return SNMP_ERRORSTATUS_NOERROR;
  42 }
  43
  44 static void setStringValue(AsnAny *value, BYTE type, DWORD len, BYTE *str)
  45 {
  46     AsnAny strValue;
  47
  48     strValue.asnType = type;
  49     strValue.asnValue.string.stream = str;
  50     strValue.asnValue.string.length = len;
  51     strValue.asnValue.string.dynamic = FALSE;
  52     SnmpUtilAsnAnyCpy(value, &strValue);
  53 }
  54
  55 typedef DWORD (*copyValueFunc)(AsnAny *value, void *src);
  56
  57 struct structToAsnValue
  58 {
  59     size_t        offset;
  60     copyValueFunc copy;
  61 };
  62
  63 static AsnInteger32 mapStructEntryToValue(struct structToAsnValue *map,
  64     UINT mapLen, void *record, UINT id, SnmpVarBind *pVarBind)
  65 {
  66     /* OIDs are 1-based */
  67     if (!id)
  68         return SNMP_ERRORSTATUS_NOSUCHNAME;
  69     --id;
  70     if (id >= mapLen)
  71         return SNMP_ERRORSTATUS_NOSUCHNAME;
  72     if (!map[id].copy)
  73         return SNMP_ERRORSTATUS_NOSUCHNAME;
  74     return map[id].copy(&pVarBind->value, (BYTE *)record + map[id].offset);
  75 }
  76
  77 static DWORD copyIpAddr(AsnAny *value, void *src)
  78 {
  79     setStringValue(value, ASN_IPADDRESS, sizeof(DWORD), src);
  80     return SNMP_ERRORSTATUS_NOERROR;
  81 }
  82
  83 static UINT mib2[] = { 1,3,6,1,2,1 };
  84 static UINT mib2System[] = { 1,3,6,1,2,1,1 };
  85
  86 typedef BOOL (*varqueryfunc)(BYTE bPduType, SnmpVarBind *pVarBind,
  87     AsnInteger32 *pErrorStatus);
  88
  89 struct mibImplementation
  90 {
  91     AsnObjectIdentifier name;
  92     void              (*init)(void);
  93     varqueryfunc        query;
  94     void              (*cleanup)(void);
  95 };
  96
  97 static UINT mib2IfNumber[] = { 1,3,6,1,2,1,2,1 };
  98 static PMIB_IFTABLE ifTable;
  99
 100 static void mib2IfNumberInit(void)
 101 {
 102     DWORD size = 0, ret = GetIfTable(NULL, &size, FALSE);
 103
 104     if (ret == ERROR_INSUFFICIENT_BUFFER)
 105     {
 106         MIB_IFTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 107         if (table)
 108         {
 109             if (!GetIfTable(table, &size, FALSE)) ifTable = table;
 110             else HeapFree(GetProcessHeap(), 0, table );
 111         }
 112     }
 113 }
 114
 115 static void mib2IfNumberCleanup(void)
 116 {
 117     HeapFree(GetProcessHeap(), 0, ifTable);
 118 }
 119
 120 static BOOL mib2IfNumberQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 121     AsnInteger32 *pErrorStatus)
 122 {
 123     AsnObjectIdentifier numberOid = DEFINE_OID(mib2IfNumber);
 124     BOOL ret = TRUE;
 125
 126     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 127         pErrorStatus);
 128
 129     switch (bPduType)
 130     {
 131     case SNMP_PDU_GET:
 132     case SNMP_PDU_GETNEXT:
 133         if ((bPduType == SNMP_PDU_GET &&
 134             !SnmpUtilOidNCmp(&pVarBind->name, &numberOid, numberOid.idLength))
 135             || SnmpUtilOidNCmp(&pVarBind->name, &numberOid, numberOid.idLength)
 136             < 0)
 137         {
 138             DWORD numIfs = ifTable ? ifTable->dwNumEntries : 0;
 139
 140             copyInt(&pVarBind->value, &numIfs);
 141             if (bPduType == SNMP_PDU_GETNEXT)
 142             {
 143                 SnmpUtilOidFree(&pVarBind->name);
 144                 SnmpUtilOidCpy(&pVarBind->name, &numberOid);
 145             }
 146             *pErrorStatus = SNMP_ERRORSTATUS_NOERROR;
 147         }
 148         else
 149         {
 150             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 151             /* Caller deals with OID if bPduType == SNMP_PDU_GETNEXT, so don't
 152              * need to set it here.
 153              */
 154         }
 155         break;
 156     case SNMP_PDU_SET:
 157         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 158         ret = FALSE;
 159         break;
 160     default:
 161         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 162         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 163     }
 164     return ret;
 165 }
 166
 167 static DWORD copyOperStatus(AsnAny *value, void *src)
 168 {
 169     value->asnType = ASN_INTEGER;
 170     /* The IPHlpApi definition of operational status differs from the MIB2 one,
 171      * so map it to the MIB2 value.
 172      */
 173     switch (*(DWORD *)src)
 174     {
 175     case MIB_IF_OPER_STATUS_OPERATIONAL:
 176         value->asnValue.number = MIB_IF_ADMIN_STATUS_UP;
 177         break;
 178     case MIB_IF_OPER_STATUS_CONNECTING:
 179     case MIB_IF_OPER_STATUS_CONNECTED:
 180         value->asnValue.number = MIB_IF_ADMIN_STATUS_TESTING;
 181         break;
 182     default:
 183         value->asnValue.number = MIB_IF_ADMIN_STATUS_DOWN;
 184     };
 185     return SNMP_ERRORSTATUS_NOERROR;
 186 }
 187
 188 /* Given an OID and a base OID that it must begin with, finds the item and
 189  * integer instance from the OID.  E.g., given an OID foo.1.2 and a base OID
 190  * foo, returns item 1 and instance 2.
 191  * If bPduType is not SNMP_PDU_GETNEXT and either the item or instance is
 192  * missing, returns SNMP_ERRORSTATUS_NOSUCHNAME.
 193  * If bPduType is SNMP_PDU_GETNEXT, returns the successor to the item and
 194  * instance, or item 1, instance 1 if either is missing.
 195  */
 196 static AsnInteger32 getItemAndIntegerInstanceFromOid(AsnObjectIdentifier *oid,
 197     AsnObjectIdentifier *base, BYTE bPduType, UINT *item, UINT *instance)
 198 {
 199     AsnInteger32 ret = SNMP_ERRORSTATUS_NOERROR;
 200
 201     switch (bPduType)
 202     {
 203     case SNMP_PDU_GETNEXT:
 204         if (SnmpUtilOidNCmp(oid, base, base->idLength) < 0)
 205         {
 206             *item = 1;
 207             *instance = 1;
 208         }
 209         else if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 210         {
 211             if (oid->idLength == base->idLength ||
 212                 oid->idLength == base->idLength + 1)
 213             {
 214                 /* Either the table or an item within the table is specified,
 215                  * but the instance is not.  Get the first instance.
 216                  */
 217                 *instance = 1;
 218                 if (oid->idLength == base->idLength + 1)
 219                     *item = oid->ids[base->idLength];
 220                 else
 221                     *item = 1;
 222             }
 223             else
 224             {
 225                 *item = oid->ids[base->idLength];
 226                 *instance = oid->ids[base->idLength + 1] + 1;
 227             }
 228         }
 229         else
 230             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 231         break;
 232     default:
 233         if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 234         {
 235             if (oid->idLength == base->idLength ||
 236                 oid->idLength == base->idLength + 1)
 237             {
 238                 /* Either the table or an item within the table is specified,
 239                  * but the instance is not.
 240                  */
 241                 ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 242             }
 243             else
 244             {
 245                 *item = oid->ids[base->idLength];
 246                 *instance = oid->ids[base->idLength + 1];
 247             }
 248         }
 249         else
 250             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 251     }
 252     return ret;
 253 }
 254
 255 /* Given an OID and a base OID that it must begin with, finds the item from the
 256  * OID.  E.g., given an OID foo.1 and a base OID foo, returns item 1.
 257  * If bPduType is not SNMP_PDU_GETNEXT and the item is missing, returns
 258  * SNMP_ERRORSTATUS_NOSUCHNAME.
 259  * If bPduType is SNMP_PDU_GETNEXT, returns the successor to the item, or item
 260  * 1 if the item is missing.
 261  */
 262 static AsnInteger32 getItemFromOid(AsnObjectIdentifier *oid,
 263     AsnObjectIdentifier *base, BYTE bPduType, UINT *item)
 264 {
 265     AsnInteger32 ret = SNMP_ERRORSTATUS_NOERROR;
 266
 267     switch (bPduType)
 268     {
 269     case SNMP_PDU_GETNEXT:
 270         if (SnmpUtilOidNCmp(oid, base, base->idLength) < 0)
 271             *item = 1;
 272         else if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 273         {
 274             if (oid->idLength == base->idLength)
 275             {
 276                 /* The item is missing, assume the first item */
 277                 *item = 1;
 278             }
 279             else
 280                 *item = oid->ids[base->idLength] + 1;
 281         }
 282         else
 283             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 284         break;
 285     default:
 286         if (!SnmpUtilOidNCmp(oid, base, base->idLength))
 287         {
 288             if (oid->idLength == base->idLength)
 289             {
 290                 /* The item is missing */
 291                 ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 292             }
 293             else
 294             {
 295                 *item = oid->ids[base->idLength];
 296                 if (!*item)
 297                     ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 298             }
 299         }
 300         else
 301             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 302     }
 303     return ret;
 304 }
 305
 306 struct GenericTable
 307 {
 308     DWORD numEntries;
 309     BYTE  entries[1];
 310 };
 311
 312 static DWORD oidToIpAddr(AsnObjectIdentifier *oid)
 313 {
 314     assert(oid && oid->idLength >= 4);
 315     /* Map the IDs to an IP address in little-endian order */
 316     return (BYTE)oid->ids[3] << 24 | (BYTE)oid->ids[2] << 16 |
 317         (BYTE)oid->ids[1] << 8 | (BYTE)oid->ids[0];
 318 }
 319
 320 typedef void (*oidToKeyFunc)(AsnObjectIdentifier *oid, void *dst);
 321 typedef int (__cdecl *compareFunc)(const void *key, const void *value);
 322
 323 /* Finds the first value in the table that matches key.  Returns its 1-based
 324  * index if found, or 0 if not found.
 325  */
 326 static UINT findValueInTable(const void *key,
 327     struct GenericTable *table, size_t tableEntrySize, compareFunc compare)
 328 {
 329     UINT index = 0;
 330     void *value;
 331
 332     value = bsearch(key, table->entries, table->numEntries, tableEntrySize,
 333         compare);
 334     if (value)
 335         index = ((BYTE *)value - (BYTE *)table->entries) / tableEntrySize + 1;
 336     return index;
 337 }
 338
 339 /* Finds the first value in the table that matches oid, using makeKey to
 340  * convert the oid to a key for comparison.  Returns the value's 1-based
 341  * index if found, or 0 if not found.
 342  */
 343 static UINT findOidInTable(AsnObjectIdentifier *oid,
 344     struct GenericTable *table, size_t tableEntrySize, oidToKeyFunc makeKey,
 345     compareFunc compare)
 346 {
 347     UINT index = 0;
 348     void *key = HeapAlloc(GetProcessHeap(), 0, tableEntrySize);
 349
 350     if (key)
 351     {
 352         makeKey(oid, key);
 353         index = findValueInTable(key, table, tableEntrySize, compare);
 354         HeapFree(GetProcessHeap(), 0, key);
 355     }
 356     return index;
 357 }
 358
 359 /* Finds the first successor to the value in the table that does matches oid,
 360  * using makeKey to convert the oid to a key for comparison.  A successor is
 361  * a value that does not match oid, so if multiple entries match an oid, only
 362  * the first will ever be returned using this method.
 363  * Returns the successor's 1-based index if found, or 0 if not found.
 364  */
 365 static UINT findNextOidInTable(AsnObjectIdentifier *oid,
 366     struct GenericTable *table, size_t tableEntrySize, oidToKeyFunc makeKey,
 367     compareFunc compare)
 368 {
 369     UINT index = 0;
 370     void *key = HeapAlloc(GetProcessHeap(), 0, tableEntrySize);
 371
 372     if (key)
 373     {
 374         makeKey(oid, key);
 375         index = findValueInTable(key, table, tableEntrySize, compare);
 376         if (index == 0)
 377         {
 378             /* Not found in table.  If it's less than the first entry, return
 379              * the first index.  Otherwise just return 0 and let the caller
 380              * handle finding the successor.
 381              */
 382             if (compare(key, table->entries) < 0)
 383                 index = 1;
 384         }
 385         else
 386         {
 387             /* Skip any entries that match the same key.  This enumeration will
 388              * be incomplete, but it's what Windows appears to do if there are
 389              * multiple entries with the same index in a table, and it avoids
 390              * an infinite loop.
 391              */
 392             for (++index; index <= table->numEntries && compare(key,
 393                 &table->entries[tableEntrySize * (index - 1)]) == 0; ++index)
 394                 ;
 395         }
 396         HeapFree(GetProcessHeap(), 0, key);
 397     }
 398     return index;
 399 }
 400
 401 /* Given an OID and a base OID that it must begin with, finds the item and
 402  * element of the table whose value matches the instance from the OID.
 403  * The OID is converted to a key with the function makeKey, and compared
 404  * against entries in the table with the function compare.
 405  * If bPduType is not SNMP_PDU_GETNEXT and either the item or instance is
 406  * missing, returns SNMP_ERRORSTATUS_NOSUCHNAME.
 407  * If bPduType is SNMP_PDU_GETNEXT, returns the successor to the item and
 408  * instance, or item 1, instance 1 if either is missing.
 409  */
 410 static AsnInteger32 getItemAndInstanceFromTable(AsnObjectIdentifier *oid,
 411     AsnObjectIdentifier *base, UINT instanceLen, BYTE bPduType,
 412     struct GenericTable *table, size_t tableEntrySize, oidToKeyFunc makeKey,
 413     compareFunc compare, UINT *item, UINT *instance)
 414 {
 415     AsnInteger32 ret = SNMP_ERRORSTATUS_NOERROR;
 416
 417     if (!table)
 418         return SNMP_ERRORSTATUS_NOSUCHNAME;
 419
 420     switch (bPduType)
 421     {
 422     case SNMP_PDU_GETNEXT:
 423         if (SnmpUtilOidNCmp(oid, base, base->idLength) < 0)
 424         {
 425             /* Return the first item and instance from the table */
 426             *item = 1;
 427             *instance = 1;
 428         }
 429         else if (!SnmpUtilOidNCmp(oid, base, base->idLength) &&
 430             oid->idLength < base->idLength + instanceLen + 1)
 431         {
 432             /* Either the table or an item is specified, but the instance is
 433              * not.
 434              */
 435             *instance = 1;
 436             if (oid->idLength >= base->idLength + 1)
 437             {
 438                 *item = oid->ids[base->idLength];
 439                 if (!*item)
 440                     *item = 1;
 441             }
 442             else
 443                 *item = 1;
 444         }
 445         else if (!SnmpUtilOidNCmp(oid, base, base->idLength) &&
 446             oid->idLength == base->idLength + instanceLen + 1)
 447         {
 448             *item = oid->ids[base->idLength];
 449             if (!*item)
 450             {
 451                 *instance = 1;
 452                 *item = 1;
 453             }
 454             else
 455             {
 456                 AsnObjectIdentifier instanceOid = { instanceLen,
 457                     oid->ids + base->idLength + 1 };
 458
 459                 *instance = findNextOidInTable(&instanceOid, table,
 460                     tableEntrySize, makeKey, compare);
 461                 if (!*instance || *instance > table->numEntries)
 462                     ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 463             }
 464         }
 465         else
 466             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 467         break;
 468     default:
 469         if (!SnmpUtilOidNCmp(oid, base, base->idLength) &&
 470             oid->idLength == base->idLength + instanceLen + 1)
 471         {
 472             *item = oid->ids[base->idLength];
 473             if (!*item)
 474                 ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 475             else
 476             {
 477                 AsnObjectIdentifier instanceOid = { instanceLen,
 478                     oid->ids + base->idLength + 1 };
 479
 480                 *instance = findOidInTable(&instanceOid, table, tableEntrySize,
 481                     makeKey, compare);
 482                 if (!*instance)
 483                     ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 484             }
 485         }
 486         else
 487             ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 488     }
 489     return ret;
 490 }
 491
 492 static INT setOidWithItem(AsnObjectIdentifier *dst, AsnObjectIdentifier *base,
 493     UINT item)
 494 {
 495     UINT id;
 496     AsnObjectIdentifier oid;
 497     INT ret;
 498
 499     SnmpUtilOidFree(dst);
 500     ret = SnmpUtilOidCpy(dst, base);
 501     if (ret)
 502     {
 503         oid.idLength = 1;
 504         oid.ids = &id;
 505         id = item;
 506         ret = SnmpUtilOidAppend(dst, &oid);
 507     }
 508     return ret;
 509 }
 510
 511 static INT setOidWithItemAndIpAddr(AsnObjectIdentifier *dst,
 512     AsnObjectIdentifier *base, UINT item, DWORD addr)
 513 {
 514     UINT id;
 515     BYTE *ptr;
 516     AsnObjectIdentifier oid;
 517     INT ret;
 518
 519     ret = setOidWithItem(dst, base, item);
 520     if (ret)
 521     {
 522         oid.idLength = 1;
 523         oid.ids = &id;
 524         for (ptr = (BYTE *)&addr; ret && ptr < (BYTE *)&addr + sizeof(DWORD);
 525          ptr++)
 526         {
 527             id = *ptr;
 528             ret = SnmpUtilOidAppend(dst, &oid);
 529         }
 530     }
 531     return ret;
 532 }
 533
 534 static INT setOidWithItemAndInteger(AsnObjectIdentifier *dst,
 535     AsnObjectIdentifier *base, UINT item, UINT instance)
 536 {
 537     AsnObjectIdentifier oid;
 538     INT ret;
 539
 540     ret = setOidWithItem(dst, base, item);
 541     if (ret)
 542     {
 543         oid.idLength = 1;
 544         oid.ids = &instance;
 545         ret = SnmpUtilOidAppend(dst, &oid);
 546     }
 547     return ret;
 548 }
 549
 550 static DWORD copyIfRowDescr(AsnAny *value, void *src)
 551 {
 552     PMIB_IFROW row = (PMIB_IFROW)((BYTE *)src -
 553                                   FIELD_OFFSET(MIB_IFROW, dwDescrLen));
 554     DWORD ret;
 555
 556     if (row->dwDescrLen)
 557     {
 558         setStringValue(value, ASN_OCTETSTRING, row->dwDescrLen, row->bDescr);
 559         ret = SNMP_ERRORSTATUS_NOERROR;
 560     }
 561     else
 562         ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 563     return ret;
 564 }
 565
 566 static DWORD copyIfRowPhysAddr(AsnAny *value, void *src)
 567 {
 568     PMIB_IFROW row = (PMIB_IFROW)((BYTE *)src -
 569                                   FIELD_OFFSET(MIB_IFROW, dwPhysAddrLen));
 570     DWORD ret;
 571
 572     if (row->dwPhysAddrLen)
 573     {
 574         setStringValue(value, ASN_OCTETSTRING, row->dwPhysAddrLen,
 575                        row->bPhysAddr);
 576         ret = SNMP_ERRORSTATUS_NOERROR;
 577     }
 578     else
 579         ret = SNMP_ERRORSTATUS_NOSUCHNAME;
 580     return ret;
 581 }
 582
 583 static struct structToAsnValue mib2IfEntryMap[] = {
 584     { FIELD_OFFSET(MIB_IFROW, dwIndex), copyInt },
 585     { FIELD_OFFSET(MIB_IFROW, dwDescrLen), copyIfRowDescr },
 586     { FIELD_OFFSET(MIB_IFROW, dwType), copyInt },
 587     { FIELD_OFFSET(MIB_IFROW, dwMtu), copyInt },
 588     { FIELD_OFFSET(MIB_IFROW, dwSpeed), copyInt },
 589     { FIELD_OFFSET(MIB_IFROW, dwPhysAddrLen), copyIfRowPhysAddr },
 590     { FIELD_OFFSET(MIB_IFROW, dwAdminStatus), copyInt },
 591     { FIELD_OFFSET(MIB_IFROW, dwOperStatus), copyOperStatus },
 592     { FIELD_OFFSET(MIB_IFROW, dwLastChange), copyInt },
 593     { FIELD_OFFSET(MIB_IFROW, dwInOctets), copyInt },
 594     { FIELD_OFFSET(MIB_IFROW, dwInUcastPkts), copyInt },
 595     { FIELD_OFFSET(MIB_IFROW, dwInNUcastPkts), copyInt },
 596     { FIELD_OFFSET(MIB_IFROW, dwInDiscards), copyInt },
 597     { FIELD_OFFSET(MIB_IFROW, dwInErrors), copyInt },
 598     { FIELD_OFFSET(MIB_IFROW, dwInUnknownProtos), copyInt },
 599     { FIELD_OFFSET(MIB_IFROW, dwOutOctets), copyInt },
 600     { FIELD_OFFSET(MIB_IFROW, dwOutUcastPkts), copyInt },
 601     { FIELD_OFFSET(MIB_IFROW, dwOutNUcastPkts), copyInt },
 602     { FIELD_OFFSET(MIB_IFROW, dwOutDiscards), copyInt },
 603     { FIELD_OFFSET(MIB_IFROW, dwOutErrors), copyInt },
 604     { FIELD_OFFSET(MIB_IFROW, dwOutQLen), copyInt },
 605 };
 606
 607 static UINT mib2IfEntry[] = { 1,3,6,1,2,1,2,2,1 };
 608
 609 static BOOL mib2IfEntryQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 610     AsnInteger32 *pErrorStatus)
 611 {
 612     AsnObjectIdentifier entryOid = DEFINE_OID(mib2IfEntry);
 613     BOOL ret = TRUE;
 614
 615     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 616         pErrorStatus);
 617
 618     switch (bPduType)
 619     {
 620     case SNMP_PDU_GET:
 621     case SNMP_PDU_GETNEXT:
 622         if (!ifTable)
 623         {
 624             /* There is no interface present, so let the caller deal
 625              * with finding the successor.
 626              */
 627             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 628         }
 629         else
 630         {
 631             UINT tableIndex = 0, item = 0;
 632
 633             *pErrorStatus = getItemAndIntegerInstanceFromOid(&pVarBind->name,
 634                 &entryOid, bPduType, &item, &tableIndex);
 635             if (!*pErrorStatus)
 636             {
 637                 assert(tableIndex);
 638                 assert(item);
 639                 if (tableIndex > ifTable->dwNumEntries)
 640                     *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 641                 else
 642                 {
 643                     *pErrorStatus = mapStructEntryToValue(mib2IfEntryMap,
 644                         DEFINE_SIZEOF(mib2IfEntryMap),
 645                         &ifTable->table[tableIndex - 1], item,
 646                         pVarBind);
 647                     if (bPduType == SNMP_PDU_GETNEXT)
 648                         ret = setOidWithItemAndInteger(&pVarBind->name,
 649                             &entryOid, item, tableIndex);
 650                 }
 651             }
 652         }
 653         break;
 654     case SNMP_PDU_SET:
 655         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 656         ret = FALSE;
 657         break;
 658     default:
 659         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 660         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 661     }
 662     return ret;
 663 }
 664
 665 static UINT mib2Ip[] = { 1,3,6,1,2,1,4 };
 666 static MIB_IPSTATS ipStats;
 667
 668 static void mib2IpStatsInit(void)
 669 {
 670     GetIpStatistics(&ipStats);
 671 }
 672
 673 static struct structToAsnValue mib2IpMap[] = {
 674     { FIELD_OFFSET(MIB_IPSTATS, u.dwForwarding), copyInt }, /* 1 */
 675     { FIELD_OFFSET(MIB_IPSTATS, dwDefaultTTL), copyInt }, /* 2 */
 676     { FIELD_OFFSET(MIB_IPSTATS, dwInReceives), copyInt }, /* 3 */
 677     { FIELD_OFFSET(MIB_IPSTATS, dwInHdrErrors), copyInt }, /* 4 */
 678     { FIELD_OFFSET(MIB_IPSTATS, dwInAddrErrors), copyInt }, /* 5 */
 679     { FIELD_OFFSET(MIB_IPSTATS, dwForwDatagrams), copyInt }, /* 6 */
 680     { FIELD_OFFSET(MIB_IPSTATS, dwInUnknownProtos), copyInt }, /* 7 */
 681     { FIELD_OFFSET(MIB_IPSTATS, dwInDiscards), copyInt }, /* 8 */
 682     { FIELD_OFFSET(MIB_IPSTATS, dwInDelivers), copyInt }, /* 9 */
 683     { FIELD_OFFSET(MIB_IPSTATS, dwOutRequests), copyInt }, /* 10 */
 684     { FIELD_OFFSET(MIB_IPSTATS, dwOutDiscards), copyInt }, /* 11 */
 685     { FIELD_OFFSET(MIB_IPSTATS, dwOutNoRoutes), copyInt }, /* 12 */
 686     { FIELD_OFFSET(MIB_IPSTATS, dwReasmTimeout), copyInt }, /* 13 */
 687     { FIELD_OFFSET(MIB_IPSTATS, dwReasmReqds), copyInt }, /* 14 */
 688     { FIELD_OFFSET(MIB_IPSTATS, dwReasmOks), copyInt }, /* 15 */
 689     { FIELD_OFFSET(MIB_IPSTATS, dwReasmFails), copyInt }, /* 16 */
 690     { FIELD_OFFSET(MIB_IPSTATS, dwFragOks), copyInt }, /* 17 */
 691     { FIELD_OFFSET(MIB_IPSTATS, dwFragFails), copyInt }, /* 18 */
 692     { FIELD_OFFSET(MIB_IPSTATS, dwFragCreates), copyInt }, /* 19 */
 693     { 0, NULL }, /* 20: not used, IP addr table */
 694     { 0, NULL }, /* 21: not used, route table */
 695     { 0, NULL }, /* 22: not used, net to media (ARP) table */
 696     { FIELD_OFFSET(MIB_IPSTATS, dwRoutingDiscards), copyInt }, /* 23 */
 697 };
 698
 699 static BOOL mib2IpStatsQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 700     AsnInteger32 *pErrorStatus)
 701 {
 702     AsnObjectIdentifier myOid = DEFINE_OID(mib2Ip);
 703     UINT item = 0;
 704     BOOL ret = TRUE;
 705
 706     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 707         pErrorStatus);
 708
 709     switch (bPduType)
 710     {
 711     case SNMP_PDU_GET:
 712     case SNMP_PDU_GETNEXT:
 713         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
 714             &item);
 715         if (!*pErrorStatus)
 716         {
 717             *pErrorStatus = mapStructEntryToValue(mib2IpMap,
 718                 DEFINE_SIZEOF(mib2IpMap), &ipStats, item, pVarBind);
 719             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 720                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
 721         }
 722         break;
 723     case SNMP_PDU_SET:
 724         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 725         ret = FALSE;
 726         break;
 727     default:
 728         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 729         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 730     }
 731     return ret;
 732 }
 733
 734 static UINT mib2IpAddr[] = { 1,3,6,1,2,1,4,20,1 };
 735 static PMIB_IPADDRTABLE ipAddrTable;
 736
 737 static struct structToAsnValue mib2IpAddrMap[] = {
 738     { FIELD_OFFSET(MIB_IPADDRROW, dwAddr), copyIpAddr },
 739     { FIELD_OFFSET(MIB_IPADDRROW, dwIndex), copyInt },
 740     { FIELD_OFFSET(MIB_IPADDRROW, dwMask), copyIpAddr },
 741     { FIELD_OFFSET(MIB_IPADDRROW, dwBCastAddr), copyInt },
 742     { FIELD_OFFSET(MIB_IPADDRROW, dwReasmSize), copyInt },
 743 };
 744
 745 static void mib2IpAddrInit(void)
 746 {
 747     DWORD size = 0, ret = GetIpAddrTable(NULL, &size, TRUE);
 748
 749     if (ret == ERROR_INSUFFICIENT_BUFFER)
 750     {
 751         MIB_IPADDRTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 752         if (table)
 753         {
 754             if (!GetIpAddrTable(table, &size, TRUE)) ipAddrTable = table;
 755             else HeapFree(GetProcessHeap(), 0, table );
 756         }
 757     }
 758 }
 759
 760 static void mib2IpAddrCleanup(void)
 761 {
 762     HeapFree(GetProcessHeap(), 0, ipAddrTable);
 763 }
 764
 765 static void oidToIpAddrRow(AsnObjectIdentifier *oid, void *dst)
 766 {
 767     MIB_IPADDRROW *row = dst;
 768
 769     row->dwAddr = oidToIpAddr(oid);
 770 }
 771
 772 static int __cdecl compareIpAddrRow(const void *a, const void *b)
 773 {
 774     const MIB_IPADDRROW *key = a, *value = b;
 775
 776     return key->dwAddr - value->dwAddr;
 777 }
 778
 779 static BOOL mib2IpAddrQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 780     AsnInteger32 *pErrorStatus)
 781 {
 782     AsnObjectIdentifier myOid = DEFINE_OID(mib2IpAddr);
 783     UINT tableIndex = 0, item = 0;
 784     BOOL ret = TRUE;
 785
 786     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 787         pErrorStatus);
 788
 789     switch (bPduType)
 790     {
 791     case SNMP_PDU_GET:
 792     case SNMP_PDU_GETNEXT:
 793         *pErrorStatus = getItemAndInstanceFromTable(&pVarBind->name,
 794             &myOid, 4, bPduType, (struct GenericTable *)ipAddrTable,
 795             sizeof(MIB_IPADDRROW), oidToIpAddrRow, compareIpAddrRow, &item,
 796             &tableIndex);
 797         if (!*pErrorStatus)
 798         {
 799             assert(tableIndex);
 800             assert(item);
 801             *pErrorStatus = mapStructEntryToValue(mib2IpAddrMap,
 802                 DEFINE_SIZEOF(mib2IpAddrMap),
 803                 &ipAddrTable->table[tableIndex - 1], item, pVarBind);
 804             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 805                 ret = setOidWithItemAndIpAddr(&pVarBind->name, &myOid, item,
 806                     ipAddrTable->table[tableIndex - 1].dwAddr);
 807         }
 808         break;
 809     case SNMP_PDU_SET:
 810         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 811         ret = FALSE;
 812         break;
 813     default:
 814         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 815         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 816     }
 817     return ret;
 818 }
 819
 820 static UINT mib2IpRoute[] = { 1,3,6,1,2,1,4,21,1 };
 821 static PMIB_IPFORWARDTABLE ipRouteTable;
 822
 823 static struct structToAsnValue mib2IpRouteMap[] = {
 824     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardDest), copyIpAddr },
 825     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardIfIndex), copyInt },
 826     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric1), copyInt },
 827     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric2), copyInt },
 828     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric3), copyInt },
 829     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric4), copyInt },
 830     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardNextHop), copyIpAddr },
 831     { FIELD_OFFSET(MIB_IPFORWARDROW, u1.dwForwardType), copyInt },
 832     { FIELD_OFFSET(MIB_IPFORWARDROW, u2.dwForwardProto), copyInt },
 833     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardAge), copyInt },
 834     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMask), copyIpAddr },
 835     { FIELD_OFFSET(MIB_IPFORWARDROW, dwForwardMetric5), copyInt },
 836 };
 837
 838 static void mib2IpRouteInit(void)
 839 {
 840     DWORD size = 0, ret = GetIpForwardTable(NULL, &size, TRUE);
 841
 842     if (ret == ERROR_INSUFFICIENT_BUFFER)
 843     {
 844         MIB_IPFORWARDTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 845         if (table)
 846         {
 847             if (!GetIpForwardTable(table, &size, TRUE)) ipRouteTable = table;
 848             else HeapFree(GetProcessHeap(), 0, table );
 849         }
 850     }
 851 }
 852
 853 static void mib2IpRouteCleanup(void)
 854 {
 855     HeapFree(GetProcessHeap(), 0, ipRouteTable);
 856 }
 857
 858 static void oidToIpForwardRow(AsnObjectIdentifier *oid, void *dst)
 859 {
 860     MIB_IPFORWARDROW *row = dst;
 861
 862     row->dwForwardDest = oidToIpAddr(oid);
 863 }
 864
 865 static int __cdecl compareIpForwardRow(const void *a, const void *b)
 866 {
 867     const MIB_IPFORWARDROW *key = a, *value = b;
 868
 869     return key->dwForwardDest - value->dwForwardDest;
 870 }
 871
 872 static BOOL mib2IpRouteQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 873     AsnInteger32 *pErrorStatus)
 874 {
 875     AsnObjectIdentifier myOid = DEFINE_OID(mib2IpRoute);
 876     UINT tableIndex = 0, item = 0;
 877     BOOL ret = TRUE;
 878
 879     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 880         pErrorStatus);
 881
 882     switch (bPduType)
 883     {
 884     case SNMP_PDU_GET:
 885     case SNMP_PDU_GETNEXT:
 886         *pErrorStatus = getItemAndInstanceFromTable(&pVarBind->name,
 887             &myOid, 4, bPduType, (struct GenericTable *)ipRouteTable,
 888             sizeof(MIB_IPFORWARDROW), oidToIpForwardRow, compareIpForwardRow,
 889             &item, &tableIndex);
 890         if (!*pErrorStatus)
 891         {
 892             assert(tableIndex);
 893             assert(item);
 894             *pErrorStatus = mapStructEntryToValue(mib2IpRouteMap,
 895                 DEFINE_SIZEOF(mib2IpRouteMap),
 896                 &ipRouteTable->table[tableIndex - 1], item, pVarBind);
 897             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 898                 ret = setOidWithItemAndIpAddr(&pVarBind->name, &myOid, item,
 899                     ipRouteTable->table[tableIndex - 1].dwForwardDest);
 900         }
 901         break;
 902     case SNMP_PDU_SET:
 903         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 904         ret = FALSE;
 905         break;
 906     default:
 907         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 908         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 909     }
 910     return ret;
 911 }
 912
 913 static UINT mib2IpNet[] = { 1,3,6,1,2,1,4,22,1 };
 914 static PMIB_IPNETTABLE ipNetTable;
 915
 916 static DWORD copyIpNetPhysAddr(AsnAny *value, void *src)
 917 {
 918     PMIB_IPNETROW row = (PMIB_IPNETROW)((BYTE *)src - FIELD_OFFSET(MIB_IPNETROW,
 919                                         dwPhysAddrLen));
 920
 921     setStringValue(value, ASN_OCTETSTRING, row->dwPhysAddrLen, row->bPhysAddr);
 922     return SNMP_ERRORSTATUS_NOERROR;
 923 }
 924
 925 static struct structToAsnValue mib2IpNetMap[] = {
 926     { FIELD_OFFSET(MIB_IPNETROW, dwIndex), copyInt },
 927     { FIELD_OFFSET(MIB_IPNETROW, dwPhysAddrLen), copyIpNetPhysAddr },
 928     { FIELD_OFFSET(MIB_IPNETROW, dwAddr), copyIpAddr },
 929     { FIELD_OFFSET(MIB_IPNETROW, u.dwType), copyInt },
 930 };
 931
 932 static void mib2IpNetInit(void)
 933 {
 934     DWORD size = 0, ret = GetIpNetTable(NULL, &size, FALSE);
 935
 936     if (ret == ERROR_INSUFFICIENT_BUFFER)
 937     {
 938         MIB_IPNETTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
 939         if (table)
 940         {
 941             if (!GetIpNetTable(table, &size, FALSE)) ipNetTable = table;
 942             else HeapFree(GetProcessHeap(), 0, table );
 943         }
 944     }
 945 }
 946
 947 static void mib2IpNetCleanup(void)
 948 {
 949     HeapFree(GetProcessHeap(), 0, ipNetTable);
 950 }
 951
 952 static BOOL mib2IpNetQuery(BYTE bPduType, SnmpVarBind *pVarBind,
 953     AsnInteger32 *pErrorStatus)
 954 {
 955     AsnObjectIdentifier myOid = DEFINE_OID(mib2IpNet);
 956     BOOL ret = TRUE;
 957
 958     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
 959         pErrorStatus);
 960
 961     switch (bPduType)
 962     {
 963     case SNMP_PDU_GET:
 964     case SNMP_PDU_GETNEXT:
 965         if (!ipNetTable)
 966             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 967         else
 968         {
 969             UINT tableIndex = 0, item = 0;
 970
 971             *pErrorStatus = getItemAndIntegerInstanceFromOid(&pVarBind->name,
 972                 &myOid, bPduType, &item, &tableIndex);
 973             if (!*pErrorStatus)
 974             {
 975                 assert(tableIndex);
 976                 assert(item);
 977                 if (tableIndex > ipNetTable->dwNumEntries)
 978                     *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 979                 else
 980                 {
 981                     *pErrorStatus = mapStructEntryToValue(mib2IpNetMap,
 982                         DEFINE_SIZEOF(mib2IpNetMap),
 983                         &ipNetTable[tableIndex - 1], item, pVarBind);
 984                     if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
 985                         ret = setOidWithItemAndInteger(&pVarBind->name, &myOid,
 986                             item, tableIndex);
 987                 }
 988             }
 989         }
 990         break;
 991     case SNMP_PDU_SET:
 992         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
 993         ret = FALSE;
 994         break;
 995     default:
 996         FIXME("0x%02x: unsupported PDU type\n", bPduType);
 997         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
 998     }
 999     return ret;
1000 }
1001
1002 static UINT mib2Icmp[] = { 1,3,6,1,2,1,5 };
1003 static MIB_ICMP icmpStats;
1004
1005 static void mib2IcmpInit(void)
1006 {
1007     GetIcmpStatistics(&icmpStats);
1008 }
1009
1010 static struct structToAsnValue mib2IcmpMap[] = {
1011     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwMsgs), copyInt },
1012     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwErrors), copyInt },
1013     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwDestUnreachs), copyInt },
1014     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwTimeExcds), copyInt },
1015     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwParmProbs), copyInt },
1016     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwSrcQuenchs), copyInt },
1017     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwRedirects), copyInt },
1018     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwEchos), copyInt },
1019     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwEchoReps), copyInt },
1020     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwTimestamps), copyInt },
1021     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwTimestampReps), copyInt },
1022     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwAddrMasks), copyInt },
1023     { FIELD_OFFSET(MIBICMPINFO, icmpInStats.dwAddrMaskReps), copyInt },
1024     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwMsgs), copyInt },
1025     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwErrors), copyInt },
1026     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwDestUnreachs), copyInt },
1027     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwTimeExcds), copyInt },
1028     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwParmProbs), copyInt },
1029     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwSrcQuenchs), copyInt },
1030     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwRedirects), copyInt },
1031     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwEchos), copyInt },
1032     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwEchoReps), copyInt },
1033     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwTimestamps), copyInt },
1034     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwTimestampReps), copyInt },
1035     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwAddrMasks), copyInt },
1036     { FIELD_OFFSET(MIBICMPINFO, icmpOutStats.dwAddrMaskReps), copyInt },
1037 };
1038
1039 static BOOL mib2IcmpQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1040     AsnInteger32 *pErrorStatus)
1041 {
1042     AsnObjectIdentifier myOid = DEFINE_OID(mib2Icmp);
1043     UINT item = 0;
1044     BOOL ret = TRUE;
1045
1046     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1047         pErrorStatus);
1048
1049     switch (bPduType)
1050     {
1051     case SNMP_PDU_GET:
1052     case SNMP_PDU_GETNEXT:
1053         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
1054             &item);
1055         if (!*pErrorStatus)
1056         {
1057             *pErrorStatus = mapStructEntryToValue(mib2IcmpMap,
1058                 DEFINE_SIZEOF(mib2IcmpMap), &icmpStats, item,
1059                 pVarBind);
1060             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1061                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
1062         }
1063         break;
1064     case SNMP_PDU_SET:
1065         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1066         ret = FALSE;
1067         break;
1068     default:
1069         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1070         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1071     }
1072     return ret;
1073 }
1074
1075 static UINT mib2Tcp[] = { 1,3,6,1,2,1,6 };
1076 static MIB_TCPSTATS tcpStats;
1077
1078 static void mib2TcpInit(void)
1079 {
1080     GetTcpStatistics(&tcpStats);
1081 }
1082
1083 static struct structToAsnValue mib2TcpMap[] = {
1084     { FIELD_OFFSET(MIB_TCPSTATS, u.dwRtoAlgorithm), copyInt },
1085     { FIELD_OFFSET(MIB_TCPSTATS, dwRtoMin), copyInt },
1086     { FIELD_OFFSET(MIB_TCPSTATS, dwRtoMax), copyInt },
1087     { FIELD_OFFSET(MIB_TCPSTATS, dwMaxConn), copyInt },
1088     { FIELD_OFFSET(MIB_TCPSTATS, dwActiveOpens), copyInt },
1089     { FIELD_OFFSET(MIB_TCPSTATS, dwPassiveOpens), copyInt },
1090     { FIELD_OFFSET(MIB_TCPSTATS, dwAttemptFails), copyInt },
1091     { FIELD_OFFSET(MIB_TCPSTATS, dwEstabResets), copyInt },
1092     { FIELD_OFFSET(MIB_TCPSTATS, dwCurrEstab), copyInt },
1093     { FIELD_OFFSET(MIB_TCPSTATS, dwInSegs), copyInt },
1094     { FIELD_OFFSET(MIB_TCPSTATS, dwOutSegs), copyInt },
1095     { FIELD_OFFSET(MIB_TCPSTATS, dwRetransSegs), copyInt },
1096     { FIELD_OFFSET(MIB_TCPSTATS, dwInErrs), copyInt },
1097     { FIELD_OFFSET(MIB_TCPSTATS, dwOutRsts), copyInt },
1098     { FIELD_OFFSET(MIB_TCPSTATS, dwNumConns), copyInt },
1099 };
1100
1101 static BOOL mib2TcpQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1102     AsnInteger32 *pErrorStatus)
1103 {
1104     AsnObjectIdentifier myOid = DEFINE_OID(mib2Tcp);
1105     UINT item = 0;
1106     BOOL ret = TRUE;
1107
1108     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1109         pErrorStatus);
1110
1111     switch (bPduType)
1112     {
1113     case SNMP_PDU_GET:
1114     case SNMP_PDU_GETNEXT:
1115         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
1116             &item);
1117         if (!*pErrorStatus)
1118         {
1119             *pErrorStatus = mapStructEntryToValue(mib2TcpMap,
1120                 DEFINE_SIZEOF(mib2TcpMap), &tcpStats, item, pVarBind);
1121             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1122                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
1123         }
1124         break;
1125     case SNMP_PDU_SET:
1126         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1127         ret = FALSE;
1128         break;
1129     default:
1130         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1131         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1132     }
1133     return ret;
1134 }
1135
1136 static UINT mib2Udp[] = { 1,3,6,1,2,1,7 };
1137 static MIB_UDPSTATS udpStats;
1138
1139 static void mib2UdpInit(void)
1140 {
1141     GetUdpStatistics(&udpStats);
1142 }
1143
1144 static struct structToAsnValue mib2UdpMap[] = {
1145     { FIELD_OFFSET(MIB_UDPSTATS, dwInDatagrams), copyInt },
1146     { FIELD_OFFSET(MIB_UDPSTATS, dwNoPorts), copyInt },
1147     { FIELD_OFFSET(MIB_UDPSTATS, dwInErrors), copyInt },
1148     { FIELD_OFFSET(MIB_UDPSTATS, dwOutDatagrams), copyInt },
1149 };
1150
1151 static BOOL mib2UdpQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1152     AsnInteger32 *pErrorStatus)
1153 {
1154     AsnObjectIdentifier myOid = DEFINE_OID(mib2Udp);
1155     UINT item;
1156     BOOL ret = TRUE;
1157
1158     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1159         pErrorStatus);
1160
1161     switch (bPduType)
1162     {
1163     case SNMP_PDU_GET:
1164     case SNMP_PDU_GETNEXT:
1165         *pErrorStatus = getItemFromOid(&pVarBind->name, &myOid, bPduType,
1166             &item);
1167         if (!*pErrorStatus)
1168         {
1169             *pErrorStatus = mapStructEntryToValue(mib2UdpMap,
1170                 DEFINE_SIZEOF(mib2UdpMap), &udpStats, item, pVarBind);
1171             if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1172                 ret = setOidWithItem(&pVarBind->name, &myOid, item);
1173         }
1174         break;
1175     case SNMP_PDU_SET:
1176         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1177         ret = FALSE;
1178         break;
1179     default:
1180         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1181         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1182     }
1183     return ret;
1184 }
1185
1186 static UINT mib2UdpEntry[] = { 1,3,6,1,2,1,7,5,1 };
1187 static PMIB_UDPTABLE udpTable;
1188
1189 static void mib2UdpEntryInit(void)
1190 {
1191     DWORD size = 0, ret = GetUdpTable(NULL, &size, TRUE);
1192
1193     if (ret == ERROR_INSUFFICIENT_BUFFER)
1194     {
1195         MIB_UDPTABLE *table = HeapAlloc(GetProcessHeap(), 0, size);
1196         if (table)
1197         {
1198             if (!GetUdpTable(table, &size, TRUE)) udpTable = table;
1199             else HeapFree(GetProcessHeap(), 0, table);
1200         }
1201     }
1202 }
1203
1204 static void mib2UdpEntryCleanup(void)
1205 {
1206     HeapFree(GetProcessHeap(), 0, udpTable);
1207 }
1208
1209 static struct structToAsnValue mib2UdpEntryMap[] = {
1210     { FIELD_OFFSET(MIB_UDPROW, dwLocalAddr), copyIpAddr },
1211     { FIELD_OFFSET(MIB_UDPROW, dwLocalPort), copyInt },
1212 };
1213
1214 static void oidToUdpRow(AsnObjectIdentifier *oid, void *dst)
1215 {
1216     MIB_UDPROW *row = dst;
1217
1218     assert(oid && oid->idLength >= 5);
1219     row->dwLocalAddr = oidToIpAddr(oid);
1220     row->dwLocalPort = oid->ids[4];
1221 }
1222
1223 static int __cdecl compareUdpRow(const void *a, const void *b)
1224 {
1225     const MIB_UDPROW *key = a, *value = b;
1226     int ret;
1227
1228     ret = key->dwLocalAddr - value->dwLocalAddr;
1229     if (ret == 0)
1230         ret = key->dwLocalPort - value->dwLocalPort;
1231     return ret;
1232 }
1233
1234 static BOOL mib2UdpEntryQuery(BYTE bPduType, SnmpVarBind *pVarBind,
1235     AsnInteger32 *pErrorStatus)
1236 {
1237     AsnObjectIdentifier myOid = DEFINE_OID(mib2UdpEntry);
1238     BOOL ret = TRUE;
1239
1240     TRACE("(0x%02x, %s, %p)\n", bPduType, SnmpUtilOidToA(&pVarBind->name),
1241         pErrorStatus);
1242
1243     switch (bPduType)
1244     {
1245     case SNMP_PDU_GET:
1246     case SNMP_PDU_GETNEXT:
1247         if (!udpTable)
1248             *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1249         else
1250         {
1251             UINT tableIndex = 0, item = 0;
1252
1253             *pErrorStatus = getItemAndInstanceFromTable(&pVarBind->name, &myOid,
1254                 5, bPduType, (struct GenericTable *)udpTable,
1255                 sizeof(MIB_UDPROW), oidToUdpRow, compareUdpRow, &item,
1256                 &tableIndex);
1257             if (!*pErrorStatus)
1258             {
1259                 assert(tableIndex);
1260                 assert(item);
1261                 *pErrorStatus = mapStructEntryToValue(mib2UdpEntryMap,
1262                     DEFINE_SIZEOF(mib2UdpEntryMap),
1263                     &udpTable->table[tableIndex - 1], item, pVarBind);
1264                 if (!*pErrorStatus && bPduType == SNMP_PDU_GETNEXT)
1265                 {
1266                     AsnObjectIdentifier oid;
1267
1268                     ret = setOidWithItemAndIpAddr(&pVarBind->name, &myOid, item,
1269                         udpTable->table[tableIndex - 1].dwLocalAddr);
1270                     if (ret)
1271                     {
1272                         oid.idLength = 1;
1273                         oid.ids = &udpTable->table[tableIndex - 1].dwLocalPort;
1274                         ret = SnmpUtilOidAppend(&pVarBind->name, &oid);
1275                     }
1276                 }
1277             }
1278         }
1279         break;
1280     case SNMP_PDU_SET:
1281         *pErrorStatus = SNMP_ERRORSTATUS_READONLY;
1282         ret = FALSE;
1283         break;
1284     default:
1285         FIXME("0x%02x: unsupported PDU type\n", bPduType);
1286         *pErrorStatus = SNMP_ERRORSTATUS_NOSUCHNAME;
1287     }
1288     return ret;
1289 }
1290
1291 /* This list MUST BE lexicographically sorted */
1292 static struct mibImplementation supportedIDs[] = {
1293     { DEFINE_OID(mib2IfNumber), mib2IfNumberInit, mib2IfNumberQuery,
1294       mib2IfNumberCleanup },
1295     { DEFINE_OID(mib2IfEntry), NULL, mib2IfEntryQuery, NULL },
1296     { DEFINE_OID(mib2Ip), mib2IpStatsInit, mib2IpStatsQuery, NULL },
1297     { DEFINE_OID(mib2IpAddr), mib2IpAddrInit, mib2IpAddrQuery,
1298       mib2IpAddrCleanup },
1299     { DEFINE_OID(mib2IpRoute), mib2IpRouteInit, mib2IpRouteQuery,
1300       mib2IpRouteCleanup },
1301     { DEFINE_OID(mib2IpNet), mib2IpNetInit, mib2IpNetQuery, mib2IpNetCleanup },
1302     { DEFINE_OID(mib2Icmp), mib2IcmpInit, mib2IcmpQuery, NULL },
1303     { DEFINE_OID(mib2Tcp), mib2TcpInit, mib2TcpQuery, NULL },
1304     { DEFINE_OID(mib2Udp), mib2UdpInit, mib2UdpQuery, NULL },
1305     { DEFINE_OID(mib2UdpEntry), mib2UdpEntryInit, mib2UdpEntryQuery,
1306       mib2UdpEntryCleanup },
1307 };
1308 static UINT minSupportedIDLength;
1309
1310 /*****************************************************************************
1311  * SnmpExtensionInit [INETMIB1.@]
1312  */
1313 BOOL WINAPI SnmpExtensionInit(DWORD dwUptimeReference,
1314     HANDLE *phSubagentTrapEvent, AsnObjectIdentifier *pFirstSupportedRegion)
1315 {
1316     AsnObjectIdentifier myOid = DEFINE_OID(mib2System);
1317     UINT i;
1318
1319     TRACE("(%d, %p, %p)\n", dwUptimeReference, phSubagentTrapEvent,
1320         pFirstSupportedRegion);
1321
1322     minSupportedIDLength = UINT_MAX;
1323     for (i = 0; i < ARRAY_SIZE(supportedIDs); i++)
1324     {
1325         if (supportedIDs[i].init)
1326             supportedIDs[i].init();
1327         if (supportedIDs[i].name.idLength < minSupportedIDLength)
1328             minSupportedIDLength = supportedIDs[i].name.idLength;
1329     }
1330     *phSubagentTrapEvent = NULL;
1331     SnmpUtilOidCpy(pFirstSupportedRegion, &myOid);
1332     return TRUE;
1333 }
1334
1335 static void cleanup(void)
1336 {
1337     UINT i;
1338
1339     for (i = 0; i < ARRAY_SIZE(supportedIDs); i++)
1340         if (supportedIDs[i].cleanup)
1341             supportedIDs[i].cleanup();
1342 }
1343
1344 static struct mibImplementation *findSupportedQuery(UINT *ids, UINT idLength,
1345     UINT *matchingIndex)
1346 {
1347     int indexHigh = DEFINE_SIZEOF(supportedIDs) - 1, indexLow = 0;
1348     AsnObjectIdentifier oid1 = { idLength, ids};
1349
1350     if (!idLength)
1351         return NULL;
1352
1353     while (indexLow <= indexHigh)
1354     {
1355         INT cmp, i = (indexLow + indexHigh) / 2;
1356         if (!(cmp = SnmpUtilOidNCmp(&oid1, &supportedIDs[i].name, idLength)))
1357         {
1358             *matchingIndex = i;
1359             return &supportedIDs[i];
1360         }
1361         if (cmp > 0)
1362             indexLow = i + 1;
1363         else
1364             indexHigh = i - 1;
1365     }
1366     return NULL;
1367 }
1368
1369 /*****************************************************************************
1370  * SnmpExtensionQuery [INETMIB1.@]
1371  */
1372 BOOL WINAPI SnmpExtensionQuery(BYTE bPduType, SnmpVarBindList *pVarBindList,
1373     AsnInteger32 *pErrorStatus, AsnInteger32 *pErrorIndex)
1374 {
1375     AsnObjectIdentifier mib2oid = DEFINE_OID(mib2);
1376     AsnInteger32 error = SNMP_ERRORSTATUS_NOERROR, errorIndex = 0;
1377     UINT i;
1378     BOOL ret = TRUE;
1379
1380     TRACE("(0x%02x, %p, %p, %p)\n", bPduType, pVarBindList,
1381         pErrorStatus, pErrorIndex);
1382
1383     for (i = 0; !error && i < pVarBindList->len; i++)
1384     {
1385         /* Ignore any OIDs not in MIB2 */
1386         if (!SnmpUtilOidNCmp(&pVarBindList->list[i].name, &mib2oid,
1387             mib2oid.idLength))
1388         {
1389             struct mibImplementation *impl = NULL;
1390             UINT len, matchingIndex = 0;
1391
1392             TRACE("%s\n", SnmpUtilOidToA(&pVarBindList->list[i].name));
1393             /* Search for an implementation matching as many octets as possible
1394              */
1395             for (len = pVarBindList->list[i].name.idLength;
1396                 len >= minSupportedIDLength && !impl; len--)
1397                 impl = findSupportedQuery(pVarBindList->list[i].name.ids, len,
1398                     &matchingIndex);
1399             if (impl && impl->query)
1400                 ret = impl->query(bPduType, &pVarBindList->list[i], &error);
1401             else
1402                 error = SNMP_ERRORSTATUS_NOSUCHNAME;
1403             if (error == SNMP_ERRORSTATUS_NOSUCHNAME &&
1404                 bPduType == SNMP_PDU_GETNEXT)
1405             {
1406                 /* GetNext is special: it finds the successor to the given OID,
1407                  * so we have to continue until an implementation handles the
1408                  * query or we exhaust the table of supported OIDs.
1409                  */
1410                 for (matchingIndex++; error == SNMP_ERRORSTATUS_NOSUCHNAME &&
1411                     matchingIndex < DEFINE_SIZEOF(supportedIDs);
1412                     matchingIndex++)
1413                 {
1414                     error = SNMP_ERRORSTATUS_NOERROR;
1415                     impl = &supportedIDs[matchingIndex];
1416                     if (impl->query)
1417                         ret = impl->query(bPduType, &pVarBindList->list[i],
1418                             &error);
1419                     else
1420                         error = SNMP_ERRORSTATUS_NOSUCHNAME;
1421                 }
1422                 /* If the query still isn't resolved, set the OID to the
1423                  * successor to the last entry in the table.
1424                  */
1425                 if (error == SNMP_ERRORSTATUS_NOSUCHNAME)
1426                 {
1427                     SnmpUtilOidFree(&pVarBindList->list[i].name);
1428                     ret = SnmpUtilOidCpy(&pVarBindList->list[i].name,
1429                         &supportedIDs[matchingIndex - 1].name);
1430                     pVarBindList->list[i].name.ids[
1431                         pVarBindList->list[i].name.idLength - 1] += 1;
1432                 }
1433             }
1434             if (error)
1435                 errorIndex = i + 1;
1436         }
1437     }
1438     *pErrorStatus = error;
1439     *pErrorIndex = errorIndex;
1440     return ret;
1441 }
1442
1443 /*****************************************************************************
1444  * DllMain [INETMIB1.@]
1445  */
1446 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
1447 {
1448     TRACE("(0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
1449
1450     switch (fdwReason)
1451     {
1452         case DLL_PROCESS_ATTACH:
1453             DisableThreadLibraryCalls(hinstDLL);
1454             break;
1455         case DLL_PROCESS_DETACH:
1456             if (lpvReserved) break;
1457             cleanup();
1458             break;
1459     }
1460
1461     return TRUE;
1462 }