src/modules/extra/m_mssql.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2008-2009 Dennis Friis <peavey@inspircd.org>
   5  *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
   6  *   Copyright (C) 2008-2009 Craig Edwards <craigedwards@brainbox.cc>
   7  *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
   8  *   Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
   9  *
  10  * This file is part of InspIRCd.  InspIRCd is free software: you can
  11  * redistribute it and/or modify it under the terms of the GNU General Public
  12  * License as published by the Free Software Foundation, version 2.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  16  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23
  24 #include "inspircd.h"
  25 #include <tds.h>
  26 #include <tdsconvert.h>
  27 #include "users.h"
  28 #include "channels.h"
  29 #include "modules.h"
  30
  31 #include "m_sqlv2.h"
  32
  33 /* $CompileFlags: exec("grep VERSION_NO /usr/include/tdsver.h 2>/dev/null | perl -e 'print "-D_TDSVER=".((<> =~ /freetds v(\d+\.\d+)/i) ? $1*100 : 0);'") */
  34 /* $LinkerFlags: -ltds */
  35 /* $ModDep: m_sqlv2.h */
  36
  37 class SQLConn;
  38 class MsSQLResult;
  39 class ModuleMsSQL;
  40
  41 typedef std::map<std::string, SQLConn*> ConnMap;
  42 typedef std::deque<MsSQLResult*> ResultQueue;
  43
  44 unsigned long count(const char * const str, char a)
  45 {
  46         unsigned long n = 0;
  47         for (const char *p = str; *p; ++p)
  48         {
  49                 if (*p == '?')
  50                         ++n;
  51         }
  52         return n;
  53 }
  54
  55 ConnMap connections;
  56 Mutex* ResultsMutex;
  57 Mutex* LoggingMutex;
  58
  59 class QueryThread : public SocketThread
  60 {
  61   private:
  62         ModuleMsSQL* const Parent;
  63   public:
  64         QueryThread(ModuleMsSQL* mod) : Parent(mod) { }
  65         ~QueryThread() { }
  66         void Run();
  67         void OnNotify();
  68 };
  69
  70 class MsSQLResult : public SQLresult
  71 {
  72  private:
  73         int currentrow;
  74         int rows;
  75         int cols;
  76
  77         std::vector<std::string> colnames;
  78         std::vector<SQLfieldList> fieldlists;
  79         SQLfieldList emptyfieldlist;
  80
  81         SQLfieldList* fieldlist;
  82         SQLfieldMap* fieldmap;
  83
  84  public:
  85         MsSQLResult(Module* self, Module* to, unsigned int rid)
  86         : SQLresult(self, to, rid), currentrow(0), rows(0), cols(0), fieldlist(NULL), fieldmap(NULL)
  87         {
  88         }
  89
  90         void AddRow(int colsnum, char **dat, char **colname)
  91         {
  92                 colnames.clear();
  93                 cols = colsnum;
  94                 for (int i = 0; i < colsnum; i++)
  95                 {
  96                         fieldlists.resize(fieldlists.size()+1);
  97                         colnames.push_back(colname[i]);
  98                         SQLfield sf(dat[i] ? dat[i] : "", dat[i] ? false : true);
  99                         fieldlists[rows].push_back(sf);
 100                 }
 101                 rows++;
 102         }
 103
 104         void UpdateAffectedCount()
 105         {
 106                 rows++;
 107         }
 108
 109         int Rows()
 110         {
 111                 return rows;
 112         }
 113
 114         int Cols()
 115         {
 116                 return cols;
 117         }
 118
 119         std::string ColName(int column)
 120         {
 121                 if (column < (int)colnames.size())
 122                 {
 123                         return colnames[column];
 124                 }
 125                 else
 126                 {
 127                         throw SQLbadColName();
 128                 }
 129                 return "";
 130         }
 131
 132         int ColNum(const std::string &column)
 133         {
 134                 for (unsigned int i = 0; i < colnames.size(); i++)
 135                 {
 136                         if (column == colnames[i])
 137                                 return i;
 138                 }
 139                 throw SQLbadColName();
 140                 return 0;
 141         }
 142
 143         SQLfield GetValue(int row, int column)
 144         {
 145                 if ((row >= 0) && (row < rows) && (column >= 0) && (column < Cols()))
 146                 {
 147                         return fieldlists[row][column];
 148                 }
 149
 150                 throw SQLbadColName();
 151
 152                 /* XXX: We never actually get here because of the throw */
 153                 return SQLfield("",true);
 154         }
 155
 156         SQLfieldList& GetRow()
 157         {
 158                 if (currentrow < rows)
 159                         return fieldlists[currentrow];
 160                 else
 161                         return emptyfieldlist;
 162         }
 163
 164         SQLfieldMap& GetRowMap()
 165         {
 166                 /* In an effort to reduce overhead we don't actually allocate the map
 167                  * until the first time it's needed...so...
 168                  */
 169                 if(fieldmap)
 170                 {
 171                         fieldmap->clear();
 172                 }
 173                 else
 174                 {
 175                         fieldmap = new SQLfieldMap;
 176                 }
 177
 178                 if (currentrow < rows)
 179                 {
 180                         for (int i = 0; i < Cols(); i++)
 181                         {
 182                                 fieldmap->insert(std::make_pair(ColName(i), GetValue(currentrow, i)));
 183                         }
 184                         currentrow++;
 185                 }
 186
 187                 return *fieldmap;
 188         }
 189
 190         SQLfieldList* GetRowPtr()
 191         {
 192                 fieldlist = new SQLfieldList();
 193
 194                 if (currentrow < rows)
 195                 {
 196                         for (int i = 0; i < Rows(); i++)
 197                         {
 198                                 fieldlist->push_back(fieldlists[currentrow][i]);
 199                         }
 200                         currentrow++;
 201                 }
 202                 return fieldlist;
 203         }
 204
 205         SQLfieldMap* GetRowMapPtr()
 206         {
 207                 fieldmap = new SQLfieldMap();
 208
 209                 if (currentrow < rows)
 210                 {
 211                         for (int i = 0; i < Cols(); i++)
 212                         {
 213                                 fieldmap->insert(std::make_pair(colnames[i],GetValue(currentrow, i)));
 214                         }
 215                         currentrow++;
 216                 }
 217
 218                 return fieldmap;
 219         }
 220
 221         void Free(SQLfieldMap* fm)
 222         {
 223                 delete fm;
 224         }
 225
 226         void Free(SQLfieldList* fl)
 227         {
 228                 delete fl;
 229         }
 230 };
 231
 232 class SQLConn : public classbase
 233 {
 234  private:
 235         ResultQueue results;
 236         Module* mod;
 237         SQLhost host;
 238         TDSLOGIN* login;
 239         TDSSOCKET* sock;
 240         TDSCONTEXT* context;
 241
 242  public:
 243         QueryQueue queue;
 244
 245         SQLConn(Module* m, const SQLhost& hi)
 246         : mod(m), host(hi), login(NULL), sock(NULL), context(NULL)
 247         {
 248                 if (OpenDB())
 249                 {
 250                         std::string query("USE " + host.name);
 251                         if (tds_submit_query(sock, query.c_str()) == TDS_SUCCEED)
 252                         {
 253                                 if (tds_process_simple_query(sock) != TDS_SUCCEED)
 254                                 {
 255                                         LoggingMutex->Lock();
 256                                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: Could not select database " + host.name + " for DB with id: " + host.id);
 257                                         LoggingMutex->Unlock();
 258                                         CloseDB();
 259                                 }
 260                         }
 261                         else
 262                         {
 263                                 LoggingMutex->Lock();
 264                                 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: Could not select database " + host.name + " for DB with id: " + host.id);
 265                                 LoggingMutex->Unlock();
 266                                 CloseDB();
 267                         }
 268                 }
 269                 else
 270                 {
 271                         LoggingMutex->Lock();
 272                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: Could not connect to DB with id: " + host.id);
 273                         LoggingMutex->Unlock();
 274                         CloseDB();
 275                 }
 276         }
 277
 278         ~SQLConn()
 279         {
 280                 CloseDB();
 281         }
 282
 283         SQLerror Query(SQLrequest* req)
 284         {
 285                 if (!sock)
 286                         return SQLerror(SQL_BAD_CONN, "Socket was NULL, check if SQL server is running.");
 287
 288                 /* Pointer to the buffer we screw around with substitution in */
 289                 char* query;
 290
 291                 /* Pointer to the current end of query, where we append new stuff */
 292                 char* queryend;
 293
 294                 /* Total length of the unescaped parameters */
 295                 unsigned long maxparamlen, paramcount;
 296
 297                 /* The length of the longest parameter */
 298                 maxparamlen = 0;
 299
 300                 for(ParamL::iterator i = req->query.p.begin(); i != req->query.p.end(); i++)
 301                 {
 302                         if (i->size() > maxparamlen)
 303                                 maxparamlen = i->size();
 304                 }
 305
 306                 /* How many params are there in the query? */
 307                 paramcount = count(req->query.q.c_str(), '?');
 308
 309                 /* This stores copy of params to be inserted with using numbered params 1;3B*/
 310                 ParamL paramscopy(req->query.p);
 311
 312                 /* To avoid a lot of allocations, allocate enough memory for the biggest the escaped query could possibly be.
 313                  * sizeofquery + (maxtotalparamlength*2) + 1
 314                  *
 315                  * The +1 is for null-terminating the string
 316                  */
 317
 318                 query = new char[req->query.q.length() + (maxparamlen*paramcount*2) + 1];
 319                 queryend = query;
 320
 321                 for(unsigned long i = 0; i < req->query.q.length(); i++)
 322                 {
 323                         if(req->query.q[i] == '?')
 324                         {
 325                                 /* We found a place to substitute..what fun.
 326                                  * use mssql calls to escape and write the
 327                                  * escaped string onto the end of our query buffer,
 328                                  * then we "just" need to make sure queryend is
 329                                  * pointing at the right place.
 330                                  */
 331
 332                                 /* Is it numbered parameter?
 333                                  */
 334
 335                                 bool numbered;
 336                                 numbered = false;
 337
 338                                 /* Numbered parameter number :|
 339                                  */
 340                                 unsigned int paramnum;
 341                                 paramnum = 0;
 342
 343                                 /* Let's check if it's a numbered param. And also calculate it's number.
 344                                  */
 345
 346                                 while ((i < req->query.q.length() - 1) && (req->query.q[i+1] >= '0') && (req->query.q[i+1] <= '9'))
 347                                 {
 348                                         numbered = true;
 349                                         ++i;
 350                                         paramnum = paramnum * 10 + req->query.q[i] - '0';
 351                                 }
 352
 353                                 if (paramnum > paramscopy.size() - 1)
 354                                 {
 355                                         /* index is out of range!
 356                                          */
 357                                         numbered = false;
 358                                 }
 359
 360                                 if (numbered)
 361                                 {
 362                                         /* Custom escaping for this one. converting ' to '' should make SQL Server happy. Ugly but fast :]
 363                                          */
 364                                         char* escaped = new char[(paramscopy[paramnum].length() * 2) + 1];
 365                                         char* escend = escaped;
 366                                         for (std::string::iterator p = paramscopy[paramnum].begin(); p < paramscopy[paramnum].end(); p++)
 367                                         {
 368                                                 if (*p == '\'')
 369                                                 {
 370                                                         *escend = *p;
 371                                                         escend++;
 372                                                         *escend = *p;
 373                                                 }
 374                                                 *escend = *p;
 375                                                 escend++;
 376                                         }
 377                                         *escend = 0;
 378
 379                                         for (char* n = escaped; *n; n++)
 380                                         {
 381                                                 *queryend = *n;
 382                                                 queryend++;
 383                                         }
 384                                         delete[] escaped;
 385                                 }
 386                                 else if (req->query.p.size())
 387                                 {
 388                                         /* Custom escaping for this one. converting ' to '' should make SQL Server happy. Ugly but fast :]
 389                                          */
 390                                         char* escaped = new char[(req->query.p.front().length() * 2) + 1];
 391                                         char* escend = escaped;
 392                                         for (std::string::iterator p = req->query.p.front().begin(); p < req->query.p.front().end(); p++)
 393                                         {
 394                                                 if (*p == '\'')
 395                                                 {
 396                                                         *escend = *p;
 397                                                         escend++;
 398                                                         *escend = *p;
 399                                                 }
 400                                                 *escend = *p;
 401                                                 escend++;
 402                                         }
 403                                         *escend = 0;
 404
 405                                         for (char* n = escaped; *n; n++)
 406                                         {
 407                                                 *queryend = *n;
 408                                                 queryend++;
 409                                         }
 410                                         delete[] escaped;
 411                                         req->query.p.pop_front();
 412                                 }
 413                                 else
 414                                         break;
 415                         }
 416                         else
 417                         {
 418                                 *queryend = req->query.q[i];
 419                                 queryend++;
 420                         }
 421                 }
 422                 *queryend = 0;
 423                 req->query.q = query;
 424
 425                 MsSQLResult* res = new MsSQLResult((Module*)mod, req->source, req->id);
 426                 res->dbid = host.id;
 427                 res->query = req->query.q;
 428
 429                 char* msquery = strdup(req->query.q.data());
 430                 LoggingMutex->Lock();
 431                 ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "doing Query: %s",msquery);
 432                 LoggingMutex->Unlock();
 433                 if (tds_submit_query(sock, msquery) != TDS_SUCCEED)
 434                 {
 435                         std::string error("failed to execute: "+std::string(req->query.q.data()));
 436                         delete[] query;
 437                         delete res;
 438                         free(msquery);
 439                         return SQLerror(SQL_QSEND_FAIL, error);
 440                 }
 441                 delete[] query;
 442                 free(msquery);
 443
 444                 int tds_res;
 445                 while (tds_process_tokens(sock, &tds_res, NULL, TDS_TOKEN_RESULTS) == TDS_SUCCEED)
 446                 {
 447                         //ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "<******> result type: %d", tds_res);
 448                         //ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "AFFECTED ROWS: %d", sock->rows_affected);
 449                         switch (tds_res)
 450                         {
 451                                 case TDS_ROWFMT_RESULT:
 452                                         break;
 453
 454                                 case TDS_DONE_RESULT:
 455                                         if (sock->rows_affected > -1)
 456                                         {
 457                                                 for (int c = 0; c < sock->rows_affected; c++)  res->UpdateAffectedCount();
 458                                                 continue;
 459                                         }
 460                                         break;
 461
 462                                 case TDS_ROW_RESULT:
 463                                         while (tds_process_tokens(sock, &tds_res, NULL, TDS_STOPAT_ROWFMT|TDS_RETURN_DONE|TDS_RETURN_ROW) == TDS_SUCCEED)
 464                                         {
 465                                                 if (tds_res != TDS_ROW_RESULT)
 466                                                         break;
 467
 468                                                 if (!sock->current_results)
 469                                                         continue;
 470
 471                                                 if (sock->res_info->row_count > 0)
 472                                                 {
 473                                                         int cols = sock->res_info->num_cols;
 474                                                         char** name = new char*[512];
 475                                                         char** data = new char*[512];
 476                                                         for (int j=0; j<cols; j++)
 477                                                         {
 478                                                                 TDSCOLUMN* col = sock->current_results->columns[j];
 479                                                                 name[j] = col->column_name;
 480
 481                                                                 int ctype;
 482                                                                 int srclen;
 483                                                                 unsigned char* src;
 484                                                                 CONV_RESULT dres;
 485                                                                 ctype = tds_get_conversion_type(col->column_type, col->column_size);
 486 #if _TDSVER >= 82
 487                                                                         src = col->column_data;
 488 #else
 489                                                                         src = &(sock->current_results->current_row[col->column_offset]);
 490 #endif
 491                                                                 srclen = col->column_cur_size;
 492                                                                 tds_convert(sock->tds_ctx, ctype, (TDS_CHAR *) src, srclen, SYBCHAR, &dres);
 493                                                                 data[j] = (char*)dres.ib;
 494                                                         }
 495                                                         ResultReady(res, cols, data, name);
 496                                                 }
 497                                         }
 498                                         break;
 499
 500                                 default:
 501                                         break;
 502                         }
 503                 }
 504                 ResultsMutex->Lock();
 505                 results.push_back(res);
 506                 ResultsMutex->Unlock();
 507                 return SQLerror();
 508         }
 509
 510         static int HandleMessage(const TDSCONTEXT * pContext, TDSSOCKET * pTdsSocket, TDSMESSAGE * pMessage)
 511         {
 512                 SQLConn* sc = (SQLConn*)pContext->parent;
 513                 LoggingMutex->Lock();
 514                 ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Message for DB with id: %s -> %s", sc->host.id.c_str(), pMessage->message);
 515                 LoggingMutex->Unlock();
 516                 return 0;
 517         }
 518
 519         static int HandleError(const TDSCONTEXT * pContext, TDSSOCKET * pTdsSocket, TDSMESSAGE * pMessage)
 520         {
 521                 SQLConn* sc = (SQLConn*)pContext->parent;
 522                 LoggingMutex->Lock();
 523                 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Error for DB with id: %s -> %s", sc->host.id.c_str(), pMessage->message);
 524                 LoggingMutex->Unlock();
 525                 return 0;
 526         }
 527
 528         void ResultReady(MsSQLResult *res, int cols, char **data, char **colnames)
 529         {
 530                 res->AddRow(cols, data, colnames);
 531         }
 532
 533         void AffectedReady(MsSQLResult *res)
 534         {
 535                 res->UpdateAffectedCount();
 536         }
 537
 538         bool OpenDB()
 539         {
 540                 CloseDB();
 541
 542                 TDSCONNECTION* conn = NULL;
 543
 544                 login = tds_alloc_login();
 545                 tds_set_app(login, "TSQL");
 546                 tds_set_library(login,"TDS-Library");
 547                 tds_set_host(login, "");
 548                 tds_set_server(login, host.host.c_str());
 549                 tds_set_server_addr(login, host.host.c_str());
 550                 tds_set_user(login, host.user.c_str());
 551                 tds_set_passwd(login, host.pass.c_str());
 552                 tds_set_port(login, host.port);
 553                 tds_set_packet(login, 512);
 554
 555                 context = tds_alloc_context(this);
 556                 context->msg_handler = HandleMessage;
 557                 context->err_handler = HandleError;
 558
 559                 sock = tds_alloc_socket(context, 512);
 560                 tds_set_parent(sock, NULL);
 561
 562                 conn = tds_read_config_info(NULL, login, context->locale);
 563
 564                 if (tds_connect(sock, conn) == TDS_SUCCEED)
 565                 {
 566                         tds_free_connection(conn);
 567                         return 1;
 568                 }
 569                 tds_free_connection(conn);
 570                 return 0;
 571         }
 572
 573         void CloseDB()
 574         {
 575                 if (sock)
 576                 {
 577                         tds_free_socket(sock);
 578                         sock = NULL;
 579                 }
 580                 if (context)
 581                 {
 582                         tds_free_context(context);
 583                         context = NULL;
 584                 }
 585                 if (login)
 586                 {
 587                         tds_free_login(login);
 588                         login = NULL;
 589                 }
 590         }
 591
 592         SQLhost GetConfHost()
 593         {
 594                 return host;
 595         }
 596
 597         void SendResults()
 598         {
 599                 while (results.size())
 600                 {
 601                         MsSQLResult* res = results[0];
 602                         ResultsMutex->Lock();
 603                         if (res->dest)
 604                         {
 605                                 res->Send();
 606                         }
 607                         else
 608                         {
 609                                 /* If the client module is unloaded partway through a query then the provider will set
 610                                  * the pointer to NULL. We cannot just cancel the query as the result will still come
 611                                  * through at some point...and it could get messy if we play with invalid pointers...
 612                                  */
 613                                 delete res;
 614                         }
 615                         results.pop_front();
 616                         ResultsMutex->Unlock();
 617                 }
 618         }
 619
 620         void ClearResults()
 621         {
 622                 while (results.size())
 623                 {
 624                         MsSQLResult* res = results[0];
 625                         delete res;
 626                         results.pop_front();
 627                 }
 628         }
 629
 630         void DoLeadingQuery()
 631         {
 632                 SQLrequest* req = queue.front();
 633                 req->error = Query(req);
 634         }
 635
 636 };
 637
 638
 639 class ModuleMsSQL : public Module
 640 {
 641  private:
 642         unsigned long currid;
 643         QueryThread* queryDispatcher;
 644         ServiceProvider sqlserv;
 645
 646  public:
 647         ModuleMsSQL()
 648         : currid(0), sqlserv(this, "SQL/mssql", SERVICE_DATA)
 649         {
 650                 LoggingMutex = new Mutex();
 651                 ResultsMutex = new Mutex();
 652                 queryDispatcher = new QueryThread(this);
 653         }
 654
 655         void init() CXX11_OVERRIDE
 656         {
 657                 ReadConf();
 658
 659                 ServerInstance->Threads->Start(queryDispatcher);
 660
 661                 Implementation eventlist[] = { I_OnRehash };
 662                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 663                 ServerInstance->Modules->AddService(sqlserv);
 664         }
 665
 666         ~ModuleMsSQL()
 667         {
 668                 queryDispatcher->join();
 669                 delete queryDispatcher;
 670                 ClearQueue();
 671                 ClearAllConnections();
 672
 673                 delete LoggingMutex;
 674                 delete ResultsMutex;
 675         }
 676
 677         void SendQueue()
 678         {
 679                 for (ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
 680                 {
 681                         iter->second->SendResults();
 682                 }
 683         }
 684
 685         void ClearQueue()
 686         {
 687                 for (ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
 688                 {
 689                         iter->second->ClearResults();
 690                 }
 691         }
 692
 693         bool HasHost(const SQLhost &host)
 694         {
 695                 for (ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
 696                 {
 697                         if (host == iter->second->GetConfHost())
 698                                 return true;
 699                 }
 700                 return false;
 701         }
 702
 703         bool HostInConf(const SQLhost &h)
 704         {
 705                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 706                 for (ConfigIter i = tags.first; i != tags.second; ++i)
 707                 {
 708                         ConfigTag* tag = i->second;
 709                         SQLhost host;
 710                         host.id         = tag->getString("id");
 711                         host.host       = tag->getString("hostname");
 712                         host.port       = tag->getInt("port", 1433);
 713                         host.name       = tag->getString("name");
 714                         host.user       = tag->getString("username");
 715                         host.pass       = tag->getString("password");
 716                         if (h == host)
 717                                 return true;
 718                 }
 719                 return false;
 720         }
 721
 722         void ReadConf()
 723         {
 724                 ClearOldConnections();
 725
 726                 ConfigTagList tags = ServerInstance->Config->ConfTags("database");
 727                 for (ConfigIter i = tags.first; i != tags.second; ++i)
 728                 {
 729                         ConfigTag* tag = i->second;
 730                         SQLhost host;
 731
 732                         host.id         = tag->getString("id");
 733                         host.host       = tag->getString("hostname");
 734                         host.port       = tag->getInt("port", 1433);
 735                         host.name       = tag->getString("name");
 736                         host.user       = tag->getString("username");
 737                         host.pass       = tag->getString("password");
 738
 739                         if (HasHost(host))
 740                                 continue;
 741
 742                         this->AddConn(host);
 743                 }
 744         }
 745
 746         void AddConn(const SQLhost& hi)
 747         {
 748                 if (HasHost(hi))
 749                 {
 750                         LoggingMutex->Lock();
 751                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: A MsSQL connection with id: %s already exists. Aborting database open attempt.", hi.id.c_str());
 752                         LoggingMutex->Unlock();
 753                         return;
 754                 }
 755
 756                 SQLConn* newconn;
 757
 758                 newconn = new SQLConn(this, hi);
 759
 760                 connections.insert(std::make_pair(hi.id, newconn));
 761         }
 762
 763         void ClearOldConnections()
 764         {
 765                 ConnMap::iterator iter,safei;
 766                 for (iter = connections.begin(); iter != connections.end(); iter++)
 767                 {
 768                         if (!HostInConf(iter->second->GetConfHost()))
 769                         {
 770                                 delete iter->second;
 771                                 safei = iter;
 772                                 --iter;
 773                                 connections.erase(safei);
 774                         }
 775                 }
 776         }
 777
 778         void ClearAllConnections()
 779         {
 780                 for(ConnMap::iterator i = connections.begin(); i != connections.end(); ++i)
 781                         delete i->second;
 782                 connections.clear();
 783         }
 784
 785         void OnRehash(User* user) CXX11_OVERRIDE
 786         {
 787                 queryDispatcher->LockQueue();
 788                 ReadConf();
 789                 queryDispatcher->UnlockQueueWakeup();
 790         }
 791
 792         void OnRequest(Request& request) CXX11_OVERRIDE
 793         {
 794                 if(strcmp(SQLREQID, request.id) == 0)
 795                 {
 796                         SQLrequest* req = (SQLrequest*)&request;
 797
 798                         queryDispatcher->LockQueue();
 799
 800                         ConnMap::iterator iter;
 801
 802                         if((iter = connections.find(req->dbid)) != connections.end())
 803                         {
 804                                 req->id = NewID();
 805                                 iter->second->queue.push(new SQLrequest(*req));
 806                         }
 807                         else
 808                         {
 809                                 req->error.Id(SQL_BAD_DBID);
 810                         }
 811                         queryDispatcher->UnlockQueueWakeup();
 812                 }
 813         }
 814
 815         unsigned long NewID()
 816         {
 817                 if (currid+1 == 0)
 818                         currid++;
 819
 820                 return ++currid;
 821         }
 822
 823         Version GetVersion() CXX11_OVERRIDE
 824         {
 825                 return Version("MsSQL provider", VF_VENDOR);
 826         }
 827
 828 };
 829
 830 void QueryThread::OnNotify()
 831 {
 832         Parent->SendQueue();
 833 }
 834
 835 void QueryThread::Run()
 836 {
 837         this->LockQueue();
 838         while (this->GetExitFlag() == false)
 839         {
 840                 SQLConn* conn = NULL;
 841                 for (ConnMap::iterator i = connections.begin(); i != connections.end(); i++)
 842                 {
 843                         if (i->second->queue.totalsize())
 844                         {
 845                                 conn = i->second;
 846                                 break;
 847                         }
 848                 }
 849                 if (conn)
 850                 {
 851                         this->UnlockQueue();
 852                         conn->DoLeadingQuery();
 853                         this->NotifyParent();
 854                         this->LockQueue();
 855                         conn->queue.pop();
 856                 }
 857                 else
 858                 {
 859                         this->WaitForQueue();
 860                 }
 861         }
 862         this->UnlockQueue();
 863 }
 864
 865 MODULE_INIT(ModuleMsSQL)