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