src/modules/extra/m_mysql.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2004 ChatSpike-Dev.
   6  *                     E-mail:
   7  *              <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *          the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include <stdio.h>
  20 #include <string>
  21 #include <mysql.h>
  22 #include <pthread.h>
  23 #include "users.h"
  24 #include "channels.h"
  25 #include "modules.h"
  26 #include "helperfuncs.h"
  27 #include "m_sqlv2.h"
  28
  29 /* VERSION 2 API: With nonblocking (threaded) requests */
  30
  31 /* $ModDesc: SQL Service Provider module for all other m_sql* modules */
  32 /* $CompileFlags: `mysql_config --include` */
  33 /* $LinkerFlags: `mysql_config --libs_r` `perl ../mysql_rpath.pl` */
  34
  35
  36 class SQLConnection;
  37 class Notifier;
  38
  39 extern InspIRCd* ServerInstance;
  40 typedef std::map<std::string, SQLConnection*> ConnMap;
  41 bool giveup = false;
  42 static Module* SQLModule = NULL;
  43 static Notifier* MessagePipe = NULL;
  44 int QueueFD = -1;
  45
  46
  47 #if !defined(MYSQL_VERSION_ID) || MYSQL_VERSION_ID<32224
  48 #define mysql_field_count mysql_num_fields
  49 #endif
  50
  51 typedef std::deque<SQLresult*> ResultQueue;
  52
  53 class QueryQueue : public classbase
  54 {
  55 private:
  56         typedef std::deque<SQLrequest> ReqDeque;
  57
  58         ReqDeque priority;      /* The priority queue */
  59         ReqDeque normal;        /* The 'normal' queue */
  60         enum { PRI, NOR, NON } which;   /* Which queue the currently active element is at the front of */
  61
  62 public:
  63         QueryQueue()
  64         : which(NON)
  65         {
  66         }
  67
  68         void push(const SQLrequest &q)
  69         {
  70                 log(DEBUG, "QueryQueue::push(): Adding %s query to queue: %s", ((q.pri) ? "priority" : "non-priority"), q.query.q.c_str());
  71
  72                 if(q.pri)
  73                         priority.push_back(q);
  74                 else
  75                         normal.push_back(q);
  76         }
  77
  78         void pop()
  79         {
  80                 if((which == PRI) && priority.size())
  81                 {
  82                         priority.pop_front();
  83                 }
  84                 else if((which == NOR) && normal.size())
  85                 {
  86                         normal.pop_front();
  87                 }
  88
  89                 /* Reset this */
  90                 which = NON;
  91
  92                 /* Silently do nothing if there was no element to pop() */
  93         }
  94
  95         SQLrequest& front()
  96         {
  97                 switch(which)
  98                 {
  99                         case PRI:
 100                                 return priority.front();
 101                         case NOR:
 102                                 return normal.front();
 103                         default:
 104                                 if(priority.size())
 105                                 {
 106                                         which = PRI;
 107                                         return priority.front();
 108                                 }
 109
 110                                 if(normal.size())
 111                                 {
 112                                         which = NOR;
 113                                         return normal.front();
 114                                 }
 115
 116                                 /* This will probably result in a segfault,
 117                                  * but the caller should have checked totalsize()
 118                                  * first so..meh - moron :p
 119                                  */
 120
 121                                 return priority.front();
 122                 }
 123         }
 124
 125         std::pair<int, int> size()
 126         {
 127                 return std::make_pair(priority.size(), normal.size());
 128         }
 129
 130         int totalsize()
 131         {
 132                 return priority.size() + normal.size();
 133         }
 134
 135         void PurgeModule(Module* mod)
 136         {
 137                 DoPurgeModule(mod, priority);
 138                 DoPurgeModule(mod, normal);
 139         }
 140
 141 private:
 142         void DoPurgeModule(Module* mod, ReqDeque& q)
 143         {
 144                 for(ReqDeque::iterator iter = q.begin(); iter != q.end(); iter++)
 145                 {
 146                         if(iter->GetSource() == mod)
 147                         {
 148                                 if(iter->id == front().id)
 149                                 {
 150                                         /* It's the currently active query.. :x */
 151                                         iter->SetSource(NULL);
 152                                 }
 153                                 else
 154                                 {
 155                                         /* It hasn't been executed yet..just remove it */
 156                                         iter = q.erase(iter);
 157                                 }
 158                         }
 159                 }
 160         }
 161 };
 162
 163 /* A mutex to wrap around queue accesses */
 164 pthread_mutex_t queue_mutex = PTHREAD_MUTEX_INITIALIZER;
 165
 166 pthread_mutex_t results_mutex = PTHREAD_MUTEX_INITIALIZER;
 167
 168 class MySQLresult : public SQLresult
 169 {
 170         int currentrow;
 171         //std::vector<std::map<std::string,std::string> > results;
 172         std::vector<std::string> colnames;
 173         std::vector<SQLfieldList> fieldlists;
 174         SQLfieldMap* fieldmap;
 175         int rows;
 176         int cols;
 177  public:
 178
 179         MySQLresult(Module* self, Module* to, MYSQL_RES* res, int affected_rows) : SQLresult(self, to), currentrow(0), fieldmap(NULL)
 180         {
 181                 /* A number of affected rows from from mysql_affected_rows.
 182                  */
 183                 log(DEBUG,"Created new MySQLresult of non-error type");
 184                 fieldlists.clear();
 185                 rows = affected_rows;
 186                 fieldlists.resize(rows);
 187                 unsigned int field_count;
 188                 if (res)
 189                 {
 190                         MYSQL_ROW row;
 191                         int n = 0;
 192                         while ((row = mysql_fetch_row(res)))
 193                         {
 194                                 field_count = 0;
 195                                 MYSQL_FIELD *fields = mysql_fetch_fields(res);
 196                                 if(mysql_num_fields(res) == 0)
 197                                         break;
 198                                 if (fields && mysql_num_fields(res))
 199                                 {
 200                                         colnames.clear();
 201                                         while (field_count < mysql_num_fields(res))
 202                                         {
 203                                                 std::string a = (fields[field_count].name ? fields[field_count].name : "");
 204                                                 std::string b = (row[field_count] ? row[field_count] : "");
 205                                                 SQLfield sqlf(a, !row[field_count]);
 206                                                 colnames.push_back(a);
 207                                                 fieldlists[n].push_back(sqlf);
 208                                                 field_count++;
 209                                         }
 210                                         n++;
 211                                 }
 212                         }
 213                         cols = mysql_num_fields(res);
 214                         mysql_free_result(res);
 215                 }
 216                 cols = field_count;
 217                 log(DEBUG, "Created new MySQL result; %d rows, %d columns", rows, cols);
 218         }
 219
 220         MySQLresult(Module* self, Module* to, SQLerror e) : SQLresult(self, to), currentrow(0)
 221         {
 222                 rows = 0;
 223                 cols = 0;
 224                 error = e;
 225                 log(DEBUG,"Created new MySQLresult of error type");
 226         }
 227
 228         ~MySQLresult()
 229         {
 230         }
 231
 232         virtual int Rows()
 233         {
 234                 return rows;
 235         }
 236
 237         virtual int Cols()
 238         {
 239                 return cols;
 240         }
 241
 242         virtual std::string ColName(int column)
 243         {
 244                 if (column < (int)colnames.size())
 245                 {
 246                         return colnames[column];
 247                 }
 248                 else
 249                 {
 250                         throw SQLbadColName();
 251                 }
 252                 return "";
 253         }
 254
 255         virtual int ColNum(const std::string &column)
 256         {
 257                 for (unsigned int i = 0; i < colnames.size(); i++)
 258                 {
 259                         if (column == colnames[i])
 260                                 return i;
 261                 }
 262                 throw SQLbadColName();
 263                 return 0;
 264         }
 265
 266         virtual SQLfield GetValue(int row, int column)
 267         {
 268                 if ((row >= 0) && (row < rows) && (column >= 0) && (column < cols))
 269                 {
 270                         return fieldlists[row][column];
 271                 }
 272
 273                 log(DEBUG,"Danger will robinson, we don't have row %d, column %d!", row, column);
 274                 throw SQLbadColName();
 275
 276                 /* XXX: We never actually get here because of the throw */
 277                 return SQLfield("",true);
 278         }
 279
 280         virtual SQLfieldList& GetRow()
 281         {
 282                 return fieldlists[currentrow];
 283         }
 284
 285         virtual SQLfieldMap& GetRowMap()
 286         {
 287                 fieldmap = new SQLfieldMap();
 288
 289                 for (int i = 0; i < cols; i++)
 290                 {
 291                         fieldmap->insert(std::make_pair(colnames[cols],GetValue(currentrow, i)));
 292                 }
 293                 currentrow++;
 294
 295                 return *fieldmap;
 296         }
 297
 298         virtual SQLfieldList* GetRowPtr()
 299         {
 300                 return &fieldlists[currentrow++];
 301         }
 302
 303         virtual SQLfieldMap* GetRowMapPtr()
 304         {
 305                 fieldmap = new SQLfieldMap();
 306
 307                 for (int i = 0; i < cols; i++)
 308                 {
 309                         fieldmap->insert(std::make_pair(colnames[cols],GetValue(currentrow, i)));
 310                 }
 311                 currentrow++;
 312
 313                 return fieldmap;
 314         }
 315
 316         virtual void Free(SQLfieldMap* fm)
 317         {
 318                 delete fm;
 319         }
 320
 321         virtual void Free(SQLfieldList* fl)
 322         {
 323                 /* XXX: Yes, this is SUPPOSED to do nothing, we
 324                  * dont want to free our fieldlist until we
 325                  * destruct the object. Unlike the pgsql module,
 326                  * we only have the one.
 327                  */
 328         }
 329 };
 330
 331 class SQLConnection;
 332
 333 void NotifyMainThread(SQLConnection* connection_with_new_result);
 334
 335 class SQLConnection : public classbase
 336 {
 337  protected:
 338
 339         MYSQL connection;
 340         MYSQL_RES *res;
 341         MYSQL_ROW row;
 342         std::string host;
 343         std::string user;
 344         std::string pass;
 345         std::string db;
 346         std::map<std::string,std::string> thisrow;
 347         bool Enabled;
 348         std::string id;
 349
 350  public:
 351
 352         QueryQueue queue;
 353         ResultQueue rq;
 354
 355         // This constructor creates an SQLConnection object with the given credentials, and creates the underlying
 356         // MYSQL struct, but does not connect yet.
 357         SQLConnection(std::string thishost, std::string thisuser, std::string thispass, std::string thisdb, const std::string &myid)
 358         {
 359                 this->Enabled = true;
 360                 this->host = thishost;
 361                 this->user = thisuser;
 362                 this->pass = thispass;
 363                 this->db = thisdb;
 364                 this->id = myid;
 365         }
 366
 367         // This method connects to the database using the credentials supplied to the constructor, and returns
 368         // true upon success.
 369         bool Connect()
 370         {
 371                 unsigned int timeout = 1;
 372                 mysql_init(&connection);
 373                 mysql_options(&connection,MYSQL_OPT_CONNECT_TIMEOUT,(char*)&timeout);
 374                 return mysql_real_connect(&connection, host.c_str(), user.c_str(), pass.c_str(), db.c_str(), 0, NULL, 0);
 375         }
 376
 377         void DoLeadingQuery()
 378         {
 379                 /* Parse the command string and dispatch it to mysql */
 380                 SQLrequest& req = queue.front();
 381                 log(DEBUG,"DO QUERY: %s",req.query.q.c_str());
 382
 383                 /* Pointer to the buffer we screw around with substitution in */
 384                 char* query;
 385
 386                 /* Pointer to the current end of query, where we append new stuff */
 387                 char* queryend;
 388
 389                 /* Total length of the unescaped parameters */
 390                 unsigned long paramlen;
 391
 392                 /* Total length of query, used for binary-safety in mysql_real_query */
 393                 unsigned long querylength = 0;
 394
 395                 paramlen = 0;
 396
 397                 for(ParamL::iterator i = req.query.p.begin(); i != req.query.p.end(); i++)
 398                 {
 399                         paramlen += i->size();
 400                 }
 401
 402                 /* To avoid a lot of allocations, allocate enough memory for the biggest the escaped query could possibly be.
 403                  * sizeofquery + (totalparamlength*2) + 1
 404                  *
 405                  * The +1 is for null-terminating the string for mysql_real_escape_string
 406                  */
 407
 408                 query = new char[req.query.q.length() + (paramlen*2)];
 409                 queryend = query;
 410
 411                 /* Okay, now we have a buffer large enough we need to start copying the query into it and escaping and substituting
 412                  * the parameters into it...
 413                  */
 414
 415                 for(unsigned long i = 0; i < req.query.q.length(); i++)
 416                 {
 417                         if(req.query.q[i] == '?')
 418                         {
 419                                 /* We found a place to substitute..what fun.
 420                                  * use mysql calls to escape and write the
 421                                  * escaped string onto the end of our query buffer,
 422                                  * then we "just" need to make sure queryend is
 423                                  * pointing at the right place.
 424                                  */
 425                                 if(req.query.p.size())
 426                                 {
 427                                         unsigned long len = mysql_real_escape_string(&connection, queryend, req.query.p.front().c_str(), req.query.p.front().length());
 428
 429                                         queryend += len;
 430                                         req.query.p.pop_front();
 431                                 }
 432                                 else
 433                                 {
 434                                         log(DEBUG, "Found a substitution location but no parameter to substitute :|");
 435                                         break;
 436                                 }
 437                         }
 438                         else
 439                         {
 440                                 *queryend = req.query.q[i];
 441                                 queryend++;
 442                         }
 443                         querylength++;
 444                 }
 445
 446                 *queryend = 0;
 447
 448                 log(DEBUG, "Attempting to dispatch query: %s", query);
 449
 450                 pthread_mutex_lock(&queue_mutex);
 451                 req.query.q = std::string(query,querylength);
 452                 pthread_mutex_unlock(&queue_mutex);
 453
 454                 if (!mysql_real_query(&connection, req.query.q.data(), req.query.q.length()))
 455                 {
 456                         /* Successfull query */
 457                         res = mysql_use_result(&connection);
 458                         unsigned long rows = mysql_affected_rows(&connection);
 459                         MySQLresult* r = new MySQLresult(SQLModule, req.GetSource(), res, rows);
 460                         r->dbid = this->GetID();
 461                         r->query = req.query.q;
 462                         /* Put this new result onto the results queue.
 463                          * XXX: Remember to mutex the queue!
 464                          */
 465                         pthread_mutex_lock(&results_mutex);
 466                         rq.push_back(r);
 467                         pthread_mutex_unlock(&results_mutex);
 468                 }
 469                 else
 470                 {
 471                         /* XXX: See /usr/include/mysql/mysqld_error.h for a list of
 472                          * possible error numbers and error messages */
 473                         SQLerror e((SQLerrorNum)mysql_errno(&connection), mysql_error(&connection));
 474                         MySQLresult* r = new MySQLresult(SQLModule, req.GetSource(), e);
 475                         r->dbid = this->GetID();
 476                         r->query = req.query.q;
 477
 478                         pthread_mutex_lock(&results_mutex);
 479                         rq.push_back(r);
 480                         pthread_mutex_unlock(&results_mutex);
 481                 }
 482
 483                 /* Now signal the main thread that we've got a result to process.
 484                  * Pass them this connection id as what to examine
 485                  */
 486
 487                 NotifyMainThread(this);
 488         }
 489
 490         bool ConnectionLost()
 491         {
 492                 if (&connection) {
 493                         return (mysql_ping(&connection) != 0);
 494                 }
 495                 else return false;
 496         }
 497
 498         bool CheckConnection()
 499         {
 500                 if (ConnectionLost()) {
 501                         return Connect();
 502                 }
 503                 else return true;
 504         }
 505
 506         std::string GetError()
 507         {
 508                 return mysql_error(&connection);
 509         }
 510
 511         const std::string& GetID()
 512         {
 513                 return id;
 514         }
 515
 516         std::string GetHost()
 517         {
 518                 return host;
 519         }
 520
 521         void SetEnable(bool Enable)
 522         {
 523                 Enabled = Enable;
 524         }
 525
 526         bool IsEnabled()
 527         {
 528                 return Enabled;
 529         }
 530
 531 };
 532
 533 ConnMap Connections;
 534
 535 void ConnectDatabases(Server* Srv)
 536 {
 537         for (ConnMap::iterator i = Connections.begin(); i != Connections.end(); i++)
 538         {
 539                 i->second->SetEnable(true);
 540                 if (i->second->Connect())
 541                 {
 542                         Srv->Log(DEFAULT,"SQL: Successfully connected database "+i->second->GetHost());
 543                 }
 544                 else
 545                 {
 546                         Srv->Log(DEFAULT,"SQL: Failed to connect database "+i->second->GetHost()+": Error: "+i->second->GetError());
 547                         i->second->SetEnable(false);
 548                 }
 549         }
 550 }
 551
 552
 553 void LoadDatabases(ConfigReader* ThisConf, Server* Srv)
 554 {
 555         Srv->Log(DEFAULT,"SQL: Loading database settings");
 556         Connections.clear();
 557         Srv->Log(DEBUG,"Cleared connections");
 558         for (int j =0; j < ThisConf->Enumerate("database"); j++)
 559         {
 560                 std::string db = ThisConf->ReadValue("database","name",j);
 561                 std::string user = ThisConf->ReadValue("database","username",j);
 562                 std::string pass = ThisConf->ReadValue("database","password",j);
 563                 std::string host = ThisConf->ReadValue("database","hostname",j);
 564                 std::string id = ThisConf->ReadValue("database","id",j);
 565                 Srv->Log(DEBUG,"Read database settings");
 566                 if ((db != "") && (host != "") && (user != "") && (id != "") && (pass != ""))
 567                 {
 568                         SQLConnection* ThisSQL = new SQLConnection(host,user,pass,db,id);
 569                         Srv->Log(DEFAULT,"Loaded database: "+ThisSQL->GetHost());
 570                         Connections[id] = ThisSQL;
 571                         Srv->Log(DEBUG,"Pushed back connection");
 572                 }
 573         }
 574         ConnectDatabases(Srv);
 575 }
 576
 577 void NotifyMainThread(SQLConnection* connection_with_new_result)
 578 {
 579         /* Here we write() to the socket the main thread has open
 580          * and we connect()ed back to before our thread became active.
 581          * The main thread is using a nonblocking socket tied into
 582          * the socket engine, so they wont block and they'll receive
 583          * nearly instant notification. Because we're in a seperate
 584          * thread, we can just use standard connect(), and we can
 585          * block if we like. We just send the connection id of the
 586          * connection back.
 587          */
 588         log(DEBUG,"Notify of result on connection: %s",connection_with_new_result->GetID().c_str());
 589         if (send(QueueFD, connection_with_new_result->GetID().c_str(), connection_with_new_result->GetID().length()+1, 0) < 1) // add one for null terminator
 590         {
 591                 log(DEBUG,"Error writing to QueueFD: %s",strerror(errno));
 592         }
 593         log(DEBUG,"Sent it on its way via fd=%d",QueueFD);
 594 }
 595
 596 void* DispatcherThread(void* arg);
 597
 598 class Notifier : public InspSocket
 599 {
 600         sockaddr_in sock_us;
 601         socklen_t uslen;
 602         Server* Srv;
 603
 604  public:
 605
 606         /* Create a socket on a random port. Let the tcp stack allocate us an available port */
 607         Notifier(Server* S) : InspSocket("127.0.0.1", 0, true, 3000), Srv(S)
 608         {
 609                 uslen = sizeof(sock_us);
 610                 if (getsockname(this->fd,(sockaddr*)&sock_us,&uslen))
 611                 {
 612                         throw ModuleException("Could not create random listening port on localhost");
 613                 }
 614         }
 615
 616         Notifier(int newfd, char* ip, Server* S) : InspSocket(newfd, ip), Srv(S)
 617         {
 618                 log(DEBUG,"Constructor of new socket");
 619         }
 620
 621         /* Using getsockname and ntohs, we can determine which port number we were allocated */
 622         int GetPort()
 623         {
 624                 return ntohs(sock_us.sin_port);
 625         }
 626
 627         virtual int OnIncomingConnection(int newsock, char* ip)
 628         {
 629                 log(DEBUG,"Inbound connection on fd %d!",newsock);
 630                 Notifier* n = new Notifier(newsock, ip, Srv);
 631                 Srv->AddSocket(n);
 632                 return true;
 633         }
 634
 635         virtual bool OnDataReady()
 636         {
 637                 log(DEBUG,"Inbound data!");
 638                 char* data = this->Read();
 639                 ConnMap::iterator iter;
 640
 641                 if (data && *data)
 642                 {
 643                         log(DEBUG,"Looking for connection %s",data);
 644                         /* We expect to be sent a null terminated string */
 645                         if((iter = Connections.find(data)) != Connections.end())
 646                         {
 647                                 log(DEBUG,"Found it!");
 648
 649                                 /* Lock the mutex, send back the data */
 650                                 pthread_mutex_lock(&results_mutex);
 651                                 ResultQueue::iterator n = iter->second->rq.begin();
 652                                 (*n)->Send();
 653                                 iter->second->rq.pop_front();
 654                                 pthread_mutex_unlock(&results_mutex);
 655                                 return true;
 656                         }
 657                 }
 658
 659                 return false;
 660         }
 661 };
 662
 663 class ModuleSQL : public Module
 664 {
 665  public:
 666         Server *Srv;
 667         ConfigReader *Conf;
 668         pthread_t Dispatcher;
 669         int currid;
 670
 671         void Implements(char* List)
 672         {
 673                 List[I_OnRehash] = List[I_OnRequest] = 1;
 674         }
 675
 676         unsigned long NewID()
 677         {
 678                 if (currid+1 == 0)
 679                         currid++;
 680                 return ++currid;
 681         }
 682
 683         char* OnRequest(Request* request)
 684         {
 685                 if(strcmp(SQLREQID, request->GetData()) == 0)
 686                 {
 687                         SQLrequest* req = (SQLrequest*)request;
 688
 689                         /* XXX: Lock */
 690                         pthread_mutex_lock(&queue_mutex);
 691
 692                         ConnMap::iterator iter;
 693
 694                         char* returnval = NULL;
 695
 696                         log(DEBUG, "Got query: '%s' with %d replacement parameters on id '%s'", req->query.q.c_str(), req->query.p.size(), req->dbid.c_str());
 697
 698                         if((iter = Connections.find(req->dbid)) != Connections.end())
 699                         {
 700                                 iter->second->queue.push(*req);
 701                                 req->id = NewID();
 702                                 returnval = SQLSUCCESS;
 703                         }
 704                         else
 705                         {
 706                                 req->error.Id(BAD_DBID);
 707                         }
 708
 709                         pthread_mutex_unlock(&queue_mutex);
 710                         /* XXX: Unlock */
 711
 712                         return returnval;
 713                 }
 714
 715                 log(DEBUG, "Got unsupported API version string: %s", request->GetData());
 716
 717                 return NULL;
 718         }
 719
 720         ModuleSQL(Server* Me)
 721                 : Module::Module(Me)
 722         {
 723                 Srv = Me;
 724                 Conf = new ConfigReader();
 725                 currid = 0;
 726                 SQLModule = this;
 727
 728                 MessagePipe = new Notifier(Srv);
 729                 Srv->AddSocket(MessagePipe);
 730                 log(DEBUG,"Bound notifier to 127.0.0.1:%d",MessagePipe->GetPort());
 731
 732                 pthread_attr_t attribs;
 733                 pthread_attr_init(&attribs);
 734                 pthread_attr_setdetachstate(&attribs, PTHREAD_CREATE_DETACHED);
 735                 if (pthread_create(&this->Dispatcher, &attribs, DispatcherThread, (void *)this) != 0)
 736                 {
 737                         throw ModuleException("m_mysql: Failed to create dispatcher thread: " + std::string(strerror(errno)));
 738                 }
 739                 Srv->PublishFeature("SQL", this);
 740                 Srv->PublishFeature("MySQL", this);
 741         }
 742
 743         virtual ~ModuleSQL()
 744         {
 745                 DELETE(Conf);
 746         }
 747
 748         virtual void OnRehash(const std::string &parameter)
 749         {
 750                 /* TODO: set rehash bool here, which makes the dispatcher thread rehash at next opportunity */
 751         }
 752
 753         virtual Version GetVersion()
 754         {
 755                 return Version(1,1,0,0,VF_VENDOR|VF_SERVICEPROVIDER);
 756         }
 757
 758 };
 759
 760 void* DispatcherThread(void* arg)
 761 {
 762         ModuleSQL* thismodule = (ModuleSQL*)arg;
 763         LoadDatabases(thismodule->Conf, thismodule->Srv);
 764
 765         /* Connect back to the Notifier */
 766
 767         if ((QueueFD = socket(AF_INET, SOCK_STREAM, 0)) == -1)
 768         {
 769                 /* crap, we're out of sockets... */
 770                 log(DEBUG,"QueueFD cant be created");
 771                 return NULL;
 772         }
 773
 774         log(DEBUG,"Initialize QueueFD to %d",QueueFD);
 775
 776         sockaddr_in addr;
 777         in_addr ia;
 778         inet_aton("127.0.0.1", &ia);
 779         addr.sin_family = AF_INET;
 780         addr.sin_addr = ia;
 781         addr.sin_port = htons(MessagePipe->GetPort());
 782
 783         if (connect(QueueFD, (sockaddr*)&addr,sizeof(addr)) == -1)
 784         {
 785                 /* wtf, we cant connect to it, but we just created it! */
 786                 log(DEBUG,"QueueFD cant connect!");
 787                 return NULL;
 788         }
 789
 790         log(DEBUG,"Connect QUEUE FD");
 791
 792         while (!giveup)
 793         {
 794                 SQLConnection* conn = NULL;
 795                 /* XXX: Lock here for safety */
 796                 pthread_mutex_lock(&queue_mutex);
 797                 for (ConnMap::iterator i = Connections.begin(); i != Connections.end(); i++)
 798                 {
 799                         if (i->second->queue.totalsize())
 800                         {
 801                                 conn = i->second;
 802                                 break;
 803                         }
 804                 }
 805                 pthread_mutex_unlock(&queue_mutex);
 806                 /* XXX: Unlock */
 807
 808                 /* Theres an item! */
 809                 if (conn)
 810                 {
 811                         log(DEBUG,"Process Leading query");
 812                         conn->DoLeadingQuery();
 813
 814                         /* XXX: Lock */
 815                         pthread_mutex_lock(&queue_mutex);
 816                         conn->queue.pop();
 817                         pthread_mutex_unlock(&queue_mutex);
 818                         /* XXX: Unlock */
 819                 }
 820
 821                 usleep(50);
 822         }
 823
 824         return NULL;
 825 }
 826
 827
 828 // stuff down here is the module-factory stuff. For basic modules you can ignore this.
 829
 830 class ModuleSQLFactory : public ModuleFactory
 831 {
 832  public:
 833         ModuleSQLFactory()
 834         {
 835         }
 836
 837         ~ModuleSQLFactory()
 838         {
 839         }
 840
 841         virtual Module * CreateModule(Server* Me)
 842         {
 843                 return new ModuleSQL(Me);
 844         }
 845
 846 };
 847
 848
 849 extern "C" void * init_module( void )
 850 {
 851         return new ModuleSQLFactory;
 852 }
 853