-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
- *
- * InspIRCd is copyright (C) 2002-2004 ChatSpike-Dev.
- * E-mail:
- * <brain@chatspike.net>
- * <Craig@chatspike.net>
- *
- * Written by Craig Edwards, Craig McLure, and others.
- * This program is free but copyrighted software; see
- * the file COPYING for details.
- *
- * ---------------------------------------------------
- */
-
-using namespace std;
-
-#include <stdio.h>
-#include <string>
-#include <mysql.h>
-#include <pthread.h>
-#include "users.h"
-#include "channels.h"
-#include "modules.h"
-#include "helperfuncs.h"
-#include "inspircd.h"
-#include "m_sqlv2.h"
-
-/* VERSION 2 API: With nonblocking (threaded) requests */
-
-/* $ModDesc: SQL Service Provider module for all other m_sql* modules */
-/* $CompileFlags: `mysql_config --include` */
-/* $LinkerFlags: `mysql_config --libs_r` `perl extra/mysql_rpath.pl` */
-
-/* THE NONBLOCKING MYSQL API!
- *
- * MySQL provides no nonblocking (asyncronous) API of its own, and its developers recommend
- * that instead, you should thread your program. This is what i've done here to allow for
- * asyncronous SQL requests via mysql. The way this works is as follows:
- *
- * The module spawns a thread via pthreads, and performs its mysql queries in this thread,
- * using a queue with priorities. There is a mutex on either end which prevents two threads
- * adjusting the queue at the same time, and crashing the ircd. Every 50 milliseconds, the
- * worker thread wakes up, and checks if there is a request at the head of its queue.
- * If there is, it processes this request, blocking the worker thread but leaving the ircd
- * thread to go about its business as usual. During this period, the ircd thread is able
- * to insert futher pending requests into the queue.
- *
- * Once the processing of a request is complete, it is removed from the incoming queue to
- * an outgoing queue, and initialized as a 'response'. The worker thread then signals the
- * ircd thread (via a loopback socket) of the fact a result is available, by sending the
- * connection ID through the connection.
- *
- * The ircd thread then mutexes the queue once more, reads the outbound response off the head
- * of the queue, and sends it on its way to the original calling module.
- *
- * XXX: You might be asking "why doesnt he just send the response from within the worker thread?"
- * The answer to this is simple. The majority of InspIRCd, and in fact most ircd's are not
- * threadsafe. This module is designed to be threadsafe and is careful with its use of threads,
- * however, if we were to call a module's OnRequest even from within a thread which was not the
- * one the module was originally instantiated upon, there is a chance of all hell breaking loose
- * if a module is ever put in a re-enterant state (stack corruption could occur, crashes, data
- * corruption, and worse, so DONT think about it until the day comes when InspIRCd is 100%
- * gauranteed threadsafe!)
- *
- * For a diagram of this system please see http://www.inspircd.org/wiki/Mysql2
- */
-
-
-class SQLConnection;
-class Notifier;
-
-extern InspIRCd* ServerInstance;
-typedef std::map<std::string, SQLConnection*> ConnMap;
-bool giveup = false;
-static Module* SQLModule = NULL;
-static Notifier* MessagePipe = NULL;
-int QueueFD = -1;
-
-
-#if !defined(MYSQL_VERSION_ID) || MYSQL_VERSION_ID<32224
-#define mysql_field_count mysql_num_fields
-#endif
-
-typedef std::deque<SQLresult*> ResultQueue;
-
-class QueryQueue : public classbase
-{
-private:
- typedef std::deque<SQLrequest> ReqDeque;
-
- ReqDeque priority; /* The priority queue */
- ReqDeque normal; /* The 'normal' queue */
- enum { PRI, NOR, NON } which; /* Which queue the currently active element is at the front of */
-
-public:
- QueryQueue()
- : which(NON)
- {
- }
-
- void push(const SQLrequest &q)
- {
- log(DEBUG, "QueryQueue::push(): Adding %s query to queue: %s", ((q.pri) ? "priority" : "non-priority"), q.query.q.c_str());
-
- if(q.pri)
- priority.push_back(q);
- else
- normal.push_back(q);
- }
-
- void pop()
- {
- if((which == PRI) && priority.size())
- {
- priority.pop_front();
- }
- else if((which == NOR) && normal.size())
- {
- normal.pop_front();
- }
-
- /* Reset this */
- which = NON;
-
- /* Silently do nothing if there was no element to pop() */
- }
-
- SQLrequest& front()
- {
- switch(which)
- {
- case PRI:
- return priority.front();
- case NOR:
- return normal.front();
- default:
- if(priority.size())
- {
- which = PRI;
- return priority.front();
- }
-
- if(normal.size())
- {
- which = NOR;
- return normal.front();
- }
-
- /* This will probably result in a segfault,
- * but the caller should have checked totalsize()
- * first so..meh - moron :p
- */
-
- return priority.front();
- }
- }
-
- std::pair<int, int> size()
- {
- return std::make_pair(priority.size(), normal.size());
- }
-
- int totalsize()
- {
- return priority.size() + normal.size();
- }
-
- void PurgeModule(Module* mod)
- {
- DoPurgeModule(mod, priority);
- DoPurgeModule(mod, normal);
- }
-
-private:
- void DoPurgeModule(Module* mod, ReqDeque& q)
- {
- for(ReqDeque::iterator iter = q.begin(); iter != q.end(); iter++)
- {
- if(iter->GetSource() == mod)
- {
- if(iter->id == front().id)
- {
- /* It's the currently active query.. :x */
- iter->SetSource(NULL);
- }
- else
- {
- /* It hasn't been executed yet..just remove it */
- iter = q.erase(iter);
- }
- }
- }
- }
-};
-
-/* A mutex to wrap around queue accesses */
-pthread_mutex_t queue_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-pthread_mutex_t results_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-class MySQLresult : public SQLresult
-{
- int currentrow;
- //std::vector<std::map<std::string,std::string> > results;
- std::vector<std::string> colnames;
- std::vector<SQLfieldList> fieldlists;
- SQLfieldMap* fieldmap;
- SQLfieldMap fieldmap2;
- SQLfieldList emptyfieldlist;
- int rows;
- public:
-
- MySQLresult(Module* self, Module* to, MYSQL_RES* res, int affected_rows, unsigned int id) : SQLresult(self, to, id), currentrow(0), fieldmap(NULL)
- {
- /* A number of affected rows from from mysql_affected_rows.
- */
- log(DEBUG,"Created new MySQLresult of non-error type");
- fieldlists.clear();
- rows = 0;
- if (affected_rows >= 1)
- {
- rows = affected_rows;
- fieldlists.resize(rows);
- }
- unsigned int field_count = 0;
- if (res)
- {
- MYSQL_ROW row;
- int n = 0;
- while ((row = mysql_fetch_row(res)))
- {
- if (fieldlists.size() < (unsigned int)rows+1)
- {
- fieldlists.resize(fieldlists.size()+1);
- }
- field_count = 0;
- MYSQL_FIELD *fields = mysql_fetch_fields(res);
- if(mysql_num_fields(res) == 0)
- break;
- if (fields && mysql_num_fields(res))
- {
- colnames.clear();
- while (field_count < mysql_num_fields(res))
- {
- std::string a = (fields[field_count].name ? fields[field_count].name : "");
- std::string b = (row[field_count] ? row[field_count] : "");
- SQLfield sqlf(b, !row[field_count]);
- colnames.push_back(a);
- fieldlists[n].push_back(sqlf);
- log(DEBUG,"Inc field count to %d",field_count+1);
- field_count++;
- }
- n++;
- }
- rows++;
- }
- mysql_free_result(res);
- }
- log(DEBUG, "Created new MySQL result; %d rows, %d columns", rows, colnames.size());
- }
-
- MySQLresult(Module* self, Module* to, SQLerror e, unsigned int id) : SQLresult(self, to, id), currentrow(0)
- {
- rows = 0;
- error = e;
- log(DEBUG,"Created new MySQLresult of error type");
- }
-
- ~MySQLresult()
- {
- }
-
- virtual int Rows()
- {
- return rows;
- }
-
- virtual int Cols()
- {
- return colnames.size();
- }
-
- virtual std::string ColName(int column)
- {
- if (column < (int)colnames.size())
- {
- return colnames[column];
- }
- else
- {
- throw SQLbadColName();
- }
- return "";
- }
-
- virtual int ColNum(const std::string &column)
- {
- for (unsigned int i = 0; i < colnames.size(); i++)
- {
- if (column == colnames[i])
- return i;
- }
- throw SQLbadColName();
- return 0;
- }
-
- virtual SQLfield GetValue(int row, int column)
- {
- if ((row >= 0) && (row < rows) && (column >= 0) && (column < Cols()))
- {
- return fieldlists[row][column];
- }
-
- log(DEBUG,"Danger will robinson, we don't have row %d, column %d!", row, column);
- throw SQLbadColName();
-
- /* XXX: We never actually get here because of the throw */
- return SQLfield("",true);
- }
-
- virtual SQLfieldList& GetRow()
- {
- if (currentrow < rows)
- return fieldlists[currentrow];
- else
- return emptyfieldlist;
- }
-
- virtual SQLfieldMap& GetRowMap()
- {
- fieldmap2.clear();
-
- if (currentrow < rows)
- {
- for (int i = 0; i < Cols(); i++)
- {
- fieldmap2.insert(std::make_pair(colnames[i],GetValue(currentrow, i)));
- }
- currentrow++;
- }
-
- return fieldmap2;
- }
-
- virtual SQLfieldList* GetRowPtr()
- {
- SQLfieldList* fieldlist = new SQLfieldList();
-
- if (currentrow < rows)
- {
- for (int i = 0; i < Rows(); i++)
- {
- fieldlist->push_back(fieldlists[currentrow][i]);
- }
- currentrow++;
- }
- return fieldlist;
- }
-
- virtual SQLfieldMap* GetRowMapPtr()
- {
- fieldmap = new SQLfieldMap();
-
- if (currentrow < rows)
- {
- for (int i = 0; i < Cols(); i++)
- {
- fieldmap->insert(std::make_pair(colnames[i],GetValue(currentrow, i)));
- }
- currentrow++;
- }
-
- return fieldmap;
- }
-
- virtual void Free(SQLfieldMap* fm)
- {
- delete fm;
- }
-
- virtual void Free(SQLfieldList* fl)
- {
- delete fl;
- }
-};
-
-class SQLConnection;
-
-void NotifyMainThread(SQLConnection* connection_with_new_result);
-
-class SQLConnection : public classbase
-{
- protected:
-
- MYSQL connection;
- MYSQL_RES *res;
- MYSQL_ROW row;
- std::string host;
- std::string user;
- std::string pass;
- std::string db;
- std::map<std::string,std::string> thisrow;
- bool Enabled;
- std::string id;
-
- public:
-
- QueryQueue queue;
- ResultQueue rq;
-
- // This constructor creates an SQLConnection object with the given credentials, and creates the underlying
- // MYSQL struct, but does not connect yet.
- SQLConnection(std::string thishost, std::string thisuser, std::string thispass, std::string thisdb, const std::string &myid)
- {
- this->Enabled = true;
- this->host = thishost;
- this->user = thisuser;
- this->pass = thispass;
- this->db = thisdb;
- this->id = myid;
- }
-
- // This method connects to the database using the credentials supplied to the constructor, and returns
- // true upon success.
- bool Connect()
- {
- unsigned int timeout = 1;
- mysql_init(&connection);
- mysql_options(&connection,MYSQL_OPT_CONNECT_TIMEOUT,(char*)&timeout);
- return mysql_real_connect(&connection, host.c_str(), user.c_str(), pass.c_str(), db.c_str(), 0, NULL, 0);
- }
-
- void DoLeadingQuery()
- {
- if (!CheckConnection())
- return;
-
- /* Parse the command string and dispatch it to mysql */
- SQLrequest& req = queue.front();
- log(DEBUG,"DO QUERY: %s",req.query.q.c_str());
-
- /* Pointer to the buffer we screw around with substitution in */
- char* query;
-
- /* Pointer to the current end of query, where we append new stuff */
- char* queryend;
-
- /* Total length of the unescaped parameters */
- unsigned long paramlen;
-
- /* Total length of query, used for binary-safety in mysql_real_query */
- unsigned long querylength = 0;
-
- paramlen = 0;
-
- for(ParamL::iterator i = req.query.p.begin(); i != req.query.p.end(); i++)
- {
- paramlen += i->size();
- }
-
- /* To avoid a lot of allocations, allocate enough memory for the biggest the escaped query could possibly be.
- * sizeofquery + (totalparamlength*2) + 1
- *
- * The +1 is for null-terminating the string for mysql_real_escape_string
- */
-
- query = new char[req.query.q.length() + (paramlen*2)];
- queryend = query;
-
- /* Okay, now we have a buffer large enough we need to start copying the query into it and escaping and substituting
- * the parameters into it...
- */
-
- for(unsigned long i = 0; i < req.query.q.length(); i++)
- {
- if(req.query.q[i] == '?')
- {
- /* We found a place to substitute..what fun.
- * use mysql calls to escape and write the
- * escaped string onto the end of our query buffer,
- * then we "just" need to make sure queryend is
- * pointing at the right place.
- */
- if(req.query.p.size())
- {
- unsigned long len = mysql_real_escape_string(&connection, queryend, req.query.p.front().c_str(), req.query.p.front().length());
-
- queryend += len;
- req.query.p.pop_front();
- }
- else
- {
- log(DEBUG, "Found a substitution location but no parameter to substitute :|");
- break;
- }
- }
- else
- {
- *queryend = req.query.q[i];
- queryend++;
- }
- querylength++;
- }
-
- *queryend = 0;
-
- log(DEBUG, "Attempting to dispatch query: %s", query);
-
- pthread_mutex_lock(&queue_mutex);
- req.query.q = query;
- pthread_mutex_unlock(&queue_mutex);
-
- log(DEBUG,"REQUEST ID: %d",req.id);
-
- if (!mysql_real_query(&connection, req.query.q.data(), req.query.q.length()))
- {
- /* Successfull query */
- res = mysql_use_result(&connection);
- unsigned long rows = mysql_affected_rows(&connection);
- MySQLresult* r = new MySQLresult(SQLModule, req.GetSource(), res, rows, req.id);
- r->dbid = this->GetID();
- r->query = req.query.q;
- /* Put this new result onto the results queue.
- * XXX: Remember to mutex the queue!
- */
- pthread_mutex_lock(&results_mutex);
- rq.push_back(r);
- pthread_mutex_unlock(&results_mutex);
- }
- else
- {
- /* XXX: See /usr/include/mysql/mysqld_error.h for a list of
- * possible error numbers and error messages */
- log(DEBUG,"SQL ERROR: %s",mysql_error(&connection));
- SQLerror e(QREPLY_FAIL, ConvToStr(mysql_errno(&connection)) + std::string(": ") + mysql_error(&connection));
- MySQLresult* r = new MySQLresult(SQLModule, req.GetSource(), e, req.id);
- r->dbid = this->GetID();
- r->query = req.query.q;
-
- pthread_mutex_lock(&results_mutex);
- rq.push_back(r);
- pthread_mutex_unlock(&results_mutex);
- }
-
- /* Now signal the main thread that we've got a result to process.
- * Pass them this connection id as what to examine
- */
-
- NotifyMainThread(this);
- }
-
- bool ConnectionLost()
- {
- if (&connection) {
- return (mysql_ping(&connection) != 0);
- }
- else return false;
- }
-
- bool CheckConnection()
- {
- if (ConnectionLost()) {
- return Connect();
- }
- else return true;
- }
-
- std::string GetError()
- {
- return mysql_error(&connection);
- }
-
- const std::string& GetID()
- {
- return id;
- }
-
- std::string GetHost()
- {
- return host;
- }
-
- void SetEnable(bool Enable)
- {
- Enabled = Enable;
- }
-
- bool IsEnabled()
- {
- return Enabled;
- }
-
-};
-
-ConnMap Connections;
-
-void ConnectDatabases(Server* Srv)
-{
- for (ConnMap::iterator i = Connections.begin(); i != Connections.end(); i++)
- {
- i->second->SetEnable(true);
- if (i->second->Connect())
- {
- log(DEFAULT,"SQL: Successfully connected database "+i->second->GetHost());
- }
- else
- {
- log(DEFAULT,"SQL: Failed to connect database "+i->second->GetHost()+": Error: "+i->second->GetError());
- i->second->SetEnable(false);
- }
- }
-}
-
-
-void LoadDatabases(ConfigReader* ThisConf, Server* Srv)
-{
- log(DEFAULT,"SQL: Loading database settings");
- Connections.clear();
- log(DEBUG,"Cleared connections");
- for (int j =0; j < ThisConf->Enumerate("database"); j++)
- {
- std::string db = ThisConf->ReadValue("database","name",j);
- std::string user = ThisConf->ReadValue("database","username",j);
- std::string pass = ThisConf->ReadValue("database","password",j);
- std::string host = ThisConf->ReadValue("database","hostname",j);
- std::string id = ThisConf->ReadValue("database","id",j);
- log(DEBUG,"Read database settings");
- if ((db != "") && (host != "") && (user != "") && (id != "") && (pass != ""))
- {
- SQLConnection* ThisSQL = new SQLConnection(host,user,pass,db,id);
- log(DEFAULT,"Loaded database: "+ThisSQL->GetHost());
- Connections[id] = ThisSQL;
- log(DEBUG,"Pushed back connection");
- }
- }
- ConnectDatabases(Srv);
-}
-
-void NotifyMainThread(SQLConnection* connection_with_new_result)
-{
- /* Here we write() to the socket the main thread has open
- * and we connect()ed back to before our thread became active.
- * The main thread is using a nonblocking socket tied into
- * the socket engine, so they wont block and they'll receive
- * nearly instant notification. Because we're in a seperate
- * thread, we can just use standard connect(), and we can
- * block if we like. We just send the connection id of the
- * connection back.
- */
- log(DEBUG,"Notify of result on connection: %s",connection_with_new_result->GetID().c_str());
- if (send(QueueFD, connection_with_new_result->GetID().c_str(), connection_with_new_result->GetID().length()+1, 0) < 1) // add one for null terminator
- {
- log(DEBUG,"Error writing to QueueFD: %s",strerror(errno));
- }
- log(DEBUG,"Sent it on its way via fd=%d",QueueFD);
-}
-
-void* DispatcherThread(void* arg);
-
-class Notifier : public InspSocket
-{
- insp_sockaddr sock_us;
- socklen_t uslen;
- Server* Srv;
-
- public:
-
- /* Create a socket on a random port. Let the tcp stack allocate us an available port */
-#ifdef IPV6
- Notifier(InspIRCd* SI, Server* S) : InspSocket(SI, "::1", 0, true, 3000), Srv(S)
-#else
- Notifier(InspIRCd* SI, Server* S) : InspSocket(SI, "127.0.0.1", 0, true, 3000), Srv(S)
-#endif
- {
- uslen = sizeof(sock_us);
- if (getsockname(this->fd,(sockaddr*)&sock_us,&uslen))
- {
- throw ModuleException("Could not create random listening port on localhost");
- }
- }
-
- Notifier(InspIRCd* SI, int newfd, char* ip, Server* S) : InspSocket(SI, newfd, ip), Srv(S)
- {
- log(DEBUG,"Constructor of new socket");
- }
-
- /* Using getsockname and ntohs, we can determine which port number we were allocated */
- int GetPort()
- {
-#ifdef IPV6
- return ntohs(sock_us.sin6_port);
-#else
- return ntohs(sock_us.sin_port);
-#endif
- }
-
- virtual int OnIncomingConnection(int newsock, char* ip)
- {
- log(DEBUG,"Inbound connection on fd %d!",newsock);
- Notifier* n = new Notifier(this->Instance, newsock, ip, Srv);
- Srv->AddSocket(n);
- return true;
- }
-
- virtual bool OnDataReady()
- {
- log(DEBUG,"Inbound data!");
- char* data = this->Read();
- ConnMap::iterator iter;
-
- if (data && *data)
- {
- log(DEBUG,"Looking for connection %s",data);
- /* We expect to be sent a null terminated string */
- if((iter = Connections.find(data)) != Connections.end())
- {
- log(DEBUG,"Found it!");
-
- /* Lock the mutex, send back the data */
- pthread_mutex_lock(&results_mutex);
- ResultQueue::iterator n = iter->second->rq.begin();
- (*n)->Send();
- iter->second->rq.pop_front();
- pthread_mutex_unlock(&results_mutex);
- return true;
- }
- }
-
- return false;
- }
-};
-
-class ModuleSQL : public Module
-{
- public:
- Server *Srv;
- ConfigReader *Conf;
- pthread_t Dispatcher;
- int currid;
-
- void Implements(char* List)
- {
- List[I_OnRehash] = List[I_OnRequest] = 1;
- }
-
- unsigned long NewID()
- {
- if (currid+1 == 0)
- currid++;
- return ++currid;
- }
-
- char* OnRequest(Request* request)
- {
- if(strcmp(SQLREQID, request->GetId()) == 0)
- {
- SQLrequest* req = (SQLrequest*)request;
-
- /* XXX: Lock */
- pthread_mutex_lock(&queue_mutex);
-
- ConnMap::iterator iter;
-
- char* returnval = NULL;
-
- 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());
-
- if((iter = Connections.find(req->dbid)) != Connections.end())
- {
- req->id = NewID();
- iter->second->queue.push(*req);
- returnval = SQLSUCCESS;
- }
- else
- {
- req->error.Id(BAD_DBID);
- }
-
- pthread_mutex_unlock(&queue_mutex);
- /* XXX: Unlock */
-
- return returnval;
- }
-
- log(DEBUG, "Got unsupported API version string: %s", request->GetId());
-
- return NULL;
- }
-
- ModuleSQL(Server* Me)
- : Module::Module(Me)
- {
- Srv = Me;
- Conf = new ConfigReader();
- currid = 0;
- SQLModule = this;
-
- MessagePipe = new Notifier(ServerInstance, Srv);
- Srv->AddSocket(MessagePipe);
- log(DEBUG,"Bound notifier to 127.0.0.1:%d",MessagePipe->GetPort());
-
- pthread_attr_t attribs;
- pthread_attr_init(&attribs);
- pthread_attr_setdetachstate(&attribs, PTHREAD_CREATE_DETACHED);
- if (pthread_create(&this->Dispatcher, &attribs, DispatcherThread, (void *)this) != 0)
- {
- throw ModuleException("m_mysql: Failed to create dispatcher thread: " + std::string(strerror(errno)));
- }
- if (!ServerInstance->PublishFeature("SQL", this))
- {
- /* Tell worker thread to exit NOW */
- giveup = true;
- throw ModuleException("m_mysql: Unable to publish feature 'SQL'");
- }
- }
-
- virtual ~ModuleSQL()
- {
- DELETE(Conf);
- }
-
- virtual void OnRehash(const std::string ¶meter)
- {
- /* TODO: set rehash bool here, which makes the dispatcher thread rehash at next opportunity */
- }
-
- virtual Version GetVersion()
- {
- return Version(1,1,0,0,VF_VENDOR|VF_SERVICEPROVIDER);
- }
-
-};
-
-void* DispatcherThread(void* arg)
-{
- log(DEBUG,"Starting Dispatcher thread, mysql version %d",mysql_get_client_version());
- ModuleSQL* thismodule = (ModuleSQL*)arg;
- LoadDatabases(thismodule->Conf, thismodule->Srv);
-
- /* Connect back to the Notifier */
-
- if ((QueueFD = socket(AF_FAMILY, SOCK_STREAM, 0)) == -1)
- {
- /* crap, we're out of sockets... */
- log(DEBUG,"QueueFD cant be created");
- return NULL;
- }
-
- log(DEBUG,"Initialize QueueFD to %d",QueueFD);
-
- insp_sockaddr addr;
-
-#ifdef IPV6
- insp_aton("::1", &addr.sin6_addr);
- addr.sin6_family = AF_FAMILY;
- addr.sin6_port = htons(MessagePipe->GetPort());
-#else
- insp_inaddr ia;
- insp_aton("127.0.0.1", &ia);
- addr.sin_family = AF_FAMILY;
- addr.sin_addr = ia;
- addr.sin_port = htons(MessagePipe->GetPort());
-#endif
-
- if (connect(QueueFD, (sockaddr*)&addr,sizeof(addr)) == -1)
- {
- /* wtf, we cant connect to it, but we just created it! */
- log(DEBUG,"QueueFD cant connect!");
- return NULL;
- }
-
- log(DEBUG,"Connect QUEUE FD");
-
- while (!giveup)
- {
- SQLConnection* conn = NULL;
- /* XXX: Lock here for safety */
- pthread_mutex_lock(&queue_mutex);
- for (ConnMap::iterator i = Connections.begin(); i != Connections.end(); i++)
- {
- if (i->second->queue.totalsize())
- {
- conn = i->second;
- break;
- }
- }
- pthread_mutex_unlock(&queue_mutex);
- /* XXX: Unlock */
-
- /* Theres an item! */
- if (conn)
- {
- log(DEBUG,"Process Leading query");
- conn->DoLeadingQuery();
-
- /* XXX: Lock */
- pthread_mutex_lock(&queue_mutex);
- conn->queue.pop();
- pthread_mutex_unlock(&queue_mutex);
- /* XXX: Unlock */
- }
-
- usleep(50);
- }
-
- return NULL;
-}
-
-
-// stuff down here is the module-factory stuff. For basic modules you can ignore this.
-
-class ModuleSQLFactory : public ModuleFactory
-{
- public:
- ModuleSQLFactory()
- {
- }
-
- ~ModuleSQLFactory()
- {
- }
-
- virtual Module * CreateModule(Server* Me)
- {
- return new ModuleSQL(Me);
- }
-
-};
-
-
-extern "C" void * init_module( void )
-{
- return new ModuleSQLFactory;
-}
+/* +------------------------------------+
\r * | Inspire Internet Relay Chat Daemon |
\r * +------------------------------------+
\r *
\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team
\r * See: http://www.inspircd.org/wiki/index.php/Credits
\r *
\r * This program is free but copyrighted software; see
\r * the file COPYING for details.
\r *
\r * ---------------------------------------------------
\r */
\r\r#include "inspircd.h"
\r#include <mysql.h>
\r#include <pthread.h>
\r#include "users.h"
\r#include "channels.h"
\r#include "modules.h"
\r#include "m_sqlv2.h"
\r\r/* VERSION 2 API: With nonblocking (threaded) requests */
\r\r/* $ModDesc: SQL Service Provider module for all other m_sql* modules */
\r/* $CompileFlags: exec("mysql_config --include") */
\r/* $LinkerFlags: exec("mysql_config --libs_r") rpath("mysql_config --libs_r") */
\r/* $ModDep: m_sqlv2.h */
\r\r/* THE NONBLOCKING MYSQL API!
\r *
\r * MySQL provides no nonblocking (asyncronous) API of its own, and its developers recommend
\r * that instead, you should thread your program. This is what i've done here to allow for
\r * asyncronous SQL requests via mysql. The way this works is as follows:
\r *
\r * The module spawns a thread via pthreads, and performs its mysql queries in this thread,
\r * using a queue with priorities. There is a mutex on either end which prevents two threads
\r * adjusting the queue at the same time, and crashing the ircd. Every 50 milliseconds, the
\r * worker thread wakes up, and checks if there is a request at the head of its queue.
\r * If there is, it processes this request, blocking the worker thread but leaving the ircd
\r * thread to go about its business as usual. During this period, the ircd thread is able
\r * to insert futher pending requests into the queue.
\r *
\r * Once the processing of a request is complete, it is removed from the incoming queue to
\r * an outgoing queue, and initialized as a 'response'. The worker thread then signals the
\r * ircd thread (via a loopback socket) of the fact a result is available, by sending the
\r * connection ID through the connection.
\r *
\r * The ircd thread then mutexes the queue once more, reads the outbound response off the head
\r * of the queue, and sends it on its way to the original calling module.
\r *
\r * XXX: You might be asking "why doesnt he just send the response from within the worker thread?"
\r * The answer to this is simple. The majority of InspIRCd, and in fact most ircd's are not
\r * threadsafe. This module is designed to be threadsafe and is careful with its use of threads,
\r * however, if we were to call a module's OnRequest even from within a thread which was not the
\r * one the module was originally instantiated upon, there is a chance of all hell breaking loose
\r * if a module is ever put in a re-enterant state (stack corruption could occur, crashes, data
\r * corruption, and worse, so DONT think about it until the day comes when InspIRCd is 100%
\r * gauranteed threadsafe!)
\r *
\r * For a diagram of this system please see http://www.inspircd.org/wiki/Mysql2
\r */
\r\r\rclass SQLConnection;
\rclass Notifier;
\r\r\rtypedef std::map<std::string, SQLConnection*> ConnMap;
\rbool giveup = false;
\rstatic Module* SQLModule = NULL;
\rstatic Notifier* MessagePipe = NULL;
\rint QueueFD = -1;
\r\r\r#if !defined(MYSQL_VERSION_ID) || MYSQL_VERSION_ID<32224
\r#define mysql_field_count mysql_num_fields
\r#endif
\r\rtypedef std::deque<SQLresult*> ResultQueue;
\r\r/* A mutex to wrap around queue accesses */
\rpthread_mutex_t queue_mutex = PTHREAD_MUTEX_INITIALIZER;
\r\rpthread_mutex_t results_mutex = PTHREAD_MUTEX_INITIALIZER;
\r\rpthread_mutex_t logging_mutex = PTHREAD_MUTEX_INITIALIZER;
\r\r/** Represents a mysql result set
\r */
\rclass MySQLresult : public SQLresult
\r{
\r int currentrow;
\r std::vector<std::string> colnames;
\r std::vector<SQLfieldList> fieldlists;
\r SQLfieldMap* fieldmap;
\r SQLfieldMap fieldmap2;
\r SQLfieldList emptyfieldlist;
\r int rows;
\r public:
\r\r MySQLresult(Module* self, Module* to, MYSQL_RES* res, int affected_rows, unsigned int id) : SQLresult(self, to, id), currentrow(0), fieldmap(NULL)
\r {
\r /* A number of affected rows from from mysql_affected_rows.
\r */
\r fieldlists.clear();
\r rows = 0;
\r if (affected_rows >= 1)
\r {
\r rows = affected_rows;
\r fieldlists.resize(rows);
\r }
\r unsigned int field_count = 0;
\r if (res)
\r {
\r MYSQL_ROW row;
\r int n = 0;
\r while ((row = mysql_fetch_row(res)))
\r {
\r if (fieldlists.size() < (unsigned int)rows+1)
\r {
\r fieldlists.resize(fieldlists.size()+1);
\r }
\r field_count = 0;
\r MYSQL_FIELD *fields = mysql_fetch_fields(res);
\r if(mysql_num_fields(res) == 0)
\r break;
\r if (fields && mysql_num_fields(res))
\r {
\r colnames.clear();
\r while (field_count < mysql_num_fields(res))
\r {
\r std::string a = (fields[field_count].name ? fields[field_count].name : "");
\r std::string b = (row[field_count] ? row[field_count] : "");
\r SQLfield sqlf(b, !row[field_count]);
\r colnames.push_back(a);
\r fieldlists[n].push_back(sqlf);
\r field_count++;
\r }
\r n++;
\r }
\r rows++;
\r }
\r mysql_free_result(res);
\r }
\r }
\r\r MySQLresult(Module* self, Module* to, SQLerror e, unsigned int id) : SQLresult(self, to, id), currentrow(0)
\r {
\r rows = 0;
\r error = e;
\r }
\r\r ~MySQLresult()
\r {
\r }
\r\r virtual int Rows()
\r {
\r return rows;
\r }
\r\r virtual int Cols()
\r {
\r return colnames.size();
\r }
\r\r virtual std::string ColName(int column)
\r {
\r if (column < (int)colnames.size())
\r {
\r return colnames[column];
\r }
\r else
\r {
\r throw SQLbadColName();
\r }
\r return "";
\r }
\r\r virtual int ColNum(const std::string &column)
\r {
\r for (unsigned int i = 0; i < colnames.size(); i++)
\r {
\r if (column == colnames[i])
\r return i;
\r }
\r throw SQLbadColName();
\r return 0;
\r }
\r\r virtual SQLfield GetValue(int row, int column)
\r {
\r if ((row >= 0) && (row < rows) && (column >= 0) && (column < Cols()))
\r {
\r return fieldlists[row][column];
\r }
\r\r throw SQLbadColName();
\r\r /* XXX: We never actually get here because of the throw */
\r return SQLfield("",true);
\r }
\r\r virtual SQLfieldList& GetRow()
\r {
\r if (currentrow < rows)
\r return fieldlists[currentrow];
\r else
\r return emptyfieldlist;
\r }
\r\r virtual SQLfieldMap& GetRowMap()
\r {
\r fieldmap2.clear();
\r\r if (currentrow < rows)
\r {
\r for (int i = 0; i < Cols(); i++)
\r {
\r fieldmap2.insert(std::make_pair(colnames[i],GetValue(currentrow, i)));
\r }
\r currentrow++;
\r }
\r\r return fieldmap2;
\r }
\r\r virtual SQLfieldList* GetRowPtr()
\r {
\r SQLfieldList* fieldlist = new SQLfieldList();
\r\r if (currentrow < rows)
\r {
\r for (int i = 0; i < Rows(); i++)
\r {
\r fieldlist->push_back(fieldlists[currentrow][i]);
\r }
\r currentrow++;
\r }
\r return fieldlist;
\r }
\r\r virtual SQLfieldMap* GetRowMapPtr()
\r {
\r fieldmap = new SQLfieldMap();
\r \r if (currentrow < rows)
\r {
\r for (int i = 0; i < Cols(); i++)
\r {
\r fieldmap->insert(std::make_pair(colnames[i],GetValue(currentrow, i)));
\r }
\r currentrow++;
\r }
\r\r return fieldmap;
\r }
\r\r virtual void Free(SQLfieldMap* fm)
\r {
\r delete fm;
\r }
\r\r virtual void Free(SQLfieldList* fl)
\r {
\r delete fl;
\r }
\r};
\r\rclass SQLConnection;
\r\rvoid NotifyMainThread(SQLConnection* connection_with_new_result);
\r\r/** Represents a connection to a mysql database
\r */
\rclass SQLConnection : public classbase
\r{
\r protected:
\r\r MYSQL connection;
\r MYSQL_RES *res;
\r MYSQL_ROW row;
\r SQLhost host;
\r std::map<std::string,std::string> thisrow;
\r bool Enabled;
\r\r public:
\r\r QueryQueue queue;
\r ResultQueue rq;
\r\r // This constructor creates an SQLConnection object with the given credentials, but does not connect yet.
\r SQLConnection(const SQLhost &hi) : host(hi), Enabled(false)
\r {
\r }
\r\r ~SQLConnection()
\r {
\r Close();
\r }
\r\r // This method connects to the database using the credentials supplied to the constructor, and returns
\r // true upon success.
\r bool Connect()
\r {
\r unsigned int timeout = 1;
\r mysql_init(&connection);
\r mysql_options(&connection,MYSQL_OPT_CONNECT_TIMEOUT,(char*)&timeout);
\r return mysql_real_connect(&connection, host.host.c_str(), host.user.c_str(), host.pass.c_str(), host.name.c_str(), host.port, NULL, 0);
\r }
\r\r void DoLeadingQuery()
\r {
\r if (!CheckConnection())
\r return;
\r\r /* Parse the command string and dispatch it to mysql */
\r SQLrequest& req = queue.front();
\r\r /* Pointer to the buffer we screw around with substitution in */
\r char* query;
\r\r /* Pointer to the current end of query, where we append new stuff */
\r char* queryend;
\r\r /* Total length of the unescaped parameters */
\r unsigned long paramlen;
\r\r /* Total length of query, used for binary-safety in mysql_real_query */
\r unsigned long querylength = 0;
\r\r paramlen = 0;
\r\r for(ParamL::iterator i = req.query.p.begin(); i != req.query.p.end(); i++)
\r {
\r paramlen += i->size();
\r }
\r\r /* To avoid a lot of allocations, allocate enough memory for the biggest the escaped query could possibly be.
\r * sizeofquery + (totalparamlength*2) + 1
\r *
\r * The +1 is for null-terminating the string for mysql_real_escape_string
\r */
\r\r query = new char[req.query.q.length() + (paramlen*2) + 1];
\r queryend = query;
\r\r /* Okay, now we have a buffer large enough we need to start copying the query into it and escaping and substituting
\r * the parameters into it...
\r */
\r\r for(unsigned long i = 0; i < req.query.q.length(); i++)
\r {
\r if(req.query.q[i] == '?')
\r {
\r /* We found a place to substitute..what fun.
\r * use mysql calls to escape and write the
\r * escaped string onto the end of our query buffer,
\r * then we "just" need to make sure queryend is
\r * pointing at the right place.
\r */
\r if(req.query.p.size())
\r {
\r unsigned long len = mysql_real_escape_string(&connection, queryend, req.query.p.front().c_str(), req.query.p.front().length());
\r\r queryend += len;
\r req.query.p.pop_front();
\r }
\r else
\r break;
\r }
\r else
\r {
\r *queryend = req.query.q[i];
\r queryend++;
\r }
\r querylength++;
\r }
\r\r *queryend = 0;
\r\r pthread_mutex_lock(&queue_mutex);
\r req.query.q = query;
\r pthread_mutex_unlock(&queue_mutex);
\r\r if (!mysql_real_query(&connection, req.query.q.data(), req.query.q.length()))
\r {
\r /* Successfull query */
\r res = mysql_use_result(&connection);
\r unsigned long rows = mysql_affected_rows(&connection);
\r MySQLresult* r = new MySQLresult(SQLModule, req.GetSource(), res, rows, req.id);
\r r->dbid = this->GetID();
\r r->query = req.query.q;
\r /* Put this new result onto the results queue.
\r * XXX: Remember to mutex the queue!
\r */
\r pthread_mutex_lock(&results_mutex);
\r rq.push_back(r);
\r pthread_mutex_unlock(&results_mutex);
\r }
\r else
\r {
\r /* XXX: See /usr/include/mysql/mysqld_error.h for a list of
\r * possible error numbers and error messages */
\r SQLerror e(QREPLY_FAIL, ConvToStr(mysql_errno(&connection)) + std::string(": ") + mysql_error(&connection));
\r MySQLresult* r = new MySQLresult(SQLModule, req.GetSource(), e, req.id);
\r r->dbid = this->GetID();
\r r->query = req.query.q;
\r\r pthread_mutex_lock(&results_mutex);
\r rq.push_back(r);
\r pthread_mutex_unlock(&results_mutex);
\r }
\r\r /* Now signal the main thread that we've got a result to process.
\r * Pass them this connection id as what to examine
\r */
\r\r delete[] query;
\r\r NotifyMainThread(this);
\r }
\r\r bool ConnectionLost()
\r {
\r if (&connection) {
\r return (mysql_ping(&connection) != 0);
\r }
\r else return false;
\r }
\r\r bool CheckConnection()
\r {
\r if (ConnectionLost()) {
\r return Connect();
\r }
\r else return true;
\r }
\r\r std::string GetError()
\r {
\r return mysql_error(&connection);
\r }
\r\r const std::string& GetID()
\r {
\r return host.id;
\r }
\r\r std::string GetHost()
\r {
\r return host.host;
\r }
\r\r void SetEnable(bool Enable)
\r {
\r Enabled = Enable;
\r }
\r\r bool IsEnabled()
\r {
\r return Enabled;
\r }
\r\r void Close()
\r {
\r mysql_close(&connection);
\r }
\r\r const SQLhost& GetConfHost()
\r {
\r return host;
\r }
\r\r};
\r\rConnMap Connections;
\r\rbool HasHost(const SQLhost &host)
\r{
\r for (ConnMap::iterator iter = Connections.begin(); iter != Connections.end(); iter++)
\r {
\r if (host == iter->second->GetConfHost())
\r return true;
\r }
\r return false;
\r}
\r\rbool HostInConf(ConfigReader* conf, const SQLhost &h)
\r{
\r for(int i = 0; i < conf->Enumerate("database"); i++)
\r {
\r SQLhost host;
\r host.id = conf->ReadValue("database", "id", i);
\r host.host = conf->ReadValue("database", "hostname", i);
\r host.port = conf->ReadInteger("database", "port", i, true);
\r host.name = conf->ReadValue("database", "name", i);
\r host.user = conf->ReadValue("database", "username", i);
\r host.pass = conf->ReadValue("database", "password", i);
\r host.ssl = conf->ReadFlag("database", "ssl", i);
\r if (h == host)
\r return true;
\r }
\r return false;
\r}
\r\rvoid ClearOldConnections(ConfigReader* conf)
\r{
\r ConnMap::iterator i,safei;
\r for (i = Connections.begin(); i != Connections.end(); i++)
\r {
\r if (!HostInConf(conf, i->second->GetConfHost()))
\r {
\r DELETE(i->second);
\r safei = i;
\r --i;
\r Connections.erase(safei);
\r }
\r }
\r}
\r\rvoid ClearAllConnections()
\r{
\r ConnMap::iterator i;
\r while ((i = Connections.begin()) != Connections.end())
\r {
\r Connections.erase(i);
\r DELETE(i->second);
\r }
\r}
\r\rvoid ConnectDatabases(InspIRCd* ServerInstance)
\r{
\r for (ConnMap::iterator i = Connections.begin(); i != Connections.end(); i++)
\r {
\r if (i->second->IsEnabled())
\r continue;
\r\r i->second->SetEnable(true);
\r if (!i->second->Connect())
\r {
\r /* XXX: MUTEX */
\r pthread_mutex_lock(&logging_mutex);
\r ServerInstance->Log(DEFAULT,"SQL: Failed to connect database "+i->second->GetHost()+": Error: "+i->second->GetError());
\r i->second->SetEnable(false);
\r pthread_mutex_unlock(&logging_mutex);
\r }
\r }
\r}
\r\rvoid LoadDatabases(ConfigReader* conf, InspIRCd* ServerInstance)
\r{
\r ClearOldConnections(conf);
\r for (int j =0; j < conf->Enumerate("database"); j++)
\r {
\r SQLhost host;
\r host.id = conf->ReadValue("database", "id", j);
\r host.host = conf->ReadValue("database", "hostname", j);
\r host.port = conf->ReadInteger("database", "port", j, true);
\r host.name = conf->ReadValue("database", "name", j);
\r host.user = conf->ReadValue("database", "username", j);
\r host.pass = conf->ReadValue("database", "password", j);
\r host.ssl = conf->ReadFlag("database", "ssl", j);
\r\r if (HasHost(host))
\r continue;
\r\r if (!host.id.empty() && !host.host.empty() && !host.name.empty() && !host.user.empty() && !host.pass.empty())
\r {
\r SQLConnection* ThisSQL = new SQLConnection(host);
\r Connections[host.id] = ThisSQL;
\r }
\r }
\r ConnectDatabases(ServerInstance);
\r}
\r\rchar FindCharId(const std::string &id)
\r{
\r char i = 1;
\r for (ConnMap::iterator iter = Connections.begin(); iter != Connections.end(); ++iter, ++i)
\r {
\r if (iter->first == id)
\r {
\r return i;
\r }
\r }
\r return 0;
\r}
\r\rConnMap::iterator GetCharId(char id)
\r{
\r char i = 1;
\r for (ConnMap::iterator iter = Connections.begin(); iter != Connections.end(); ++iter, ++i)
\r {
\r if (i == id)
\r return iter;
\r }
\r return Connections.end();
\r}
\r\rvoid NotifyMainThread(SQLConnection* connection_with_new_result)
\r{
\r /* Here we write() to the socket the main thread has open
\r * and we connect()ed back to before our thread became active.
\r * The main thread is using a nonblocking socket tied into
\r * the socket engine, so they wont block and they'll receive
\r * nearly instant notification. Because we're in a seperate
\r * thread, we can just use standard connect(), and we can
\r * block if we like. We just send the connection id of the
\r * connection back.
\r *
\r * NOTE: We only send a single char down the connection, this
\r * way we know it wont get a partial read at the other end if
\r * the system is especially congested (see bug #263).
\r * The function FindCharId translates a connection name into a
\r * one character id, and GetCharId translates a character id
\r * back into an iterator.
\r */
\r char id = FindCharId(connection_with_new_result->GetID());
\r send(QueueFD, &id, 1, 0);
\r}
\r\rvoid* DispatcherThread(void* arg);
\r\r/** Used by m_mysql to notify one thread when the other has a result
\r */
\rclass Notifier : public InspSocket
\r{
\r insp_sockaddr sock_us;
\r socklen_t uslen;
\r \r\r public:
\r\r /* Create a socket on a random port. Let the tcp stack allocate us an available port */
\r#ifdef IPV6
\r Notifier(InspIRCd* SI) : InspSocket(SI, "::1", 0, true, 3000)
\r#else
\r Notifier(InspIRCd* SI) : InspSocket(SI, "127.0.0.1", 0, true, 3000)
\r#endif
\r {
\r uslen = sizeof(sock_us);
\r if (getsockname(this->fd,(sockaddr*)&sock_us,&uslen))
\r {
\r throw ModuleException("Could not create random listening port on localhost");
\r }
\r }
\r\r Notifier(InspIRCd* SI, int newfd, char* ip) : InspSocket(SI, newfd, ip)
\r {
\r }
\r\r /* Using getsockname and ntohs, we can determine which port number we were allocated */
\r int GetPort()
\r {
\r#ifdef IPV6
\r return ntohs(sock_us.sin6_port);
\r#else
\r return ntohs(sock_us.sin_port);
\r#endif
\r }
\r\r virtual int OnIncomingConnection(int newsock, char* ip)
\r {
\r Notifier* n = new Notifier(this->Instance, newsock, ip);
\r n = n; /* Stop bitching at me, GCC */
\r return true;
\r }
\r\r virtual bool OnDataReady()
\r {
\r char data = 0;
\r /* NOTE: Only a single character is read so we know we
\r * cant get a partial read. (We've been told that theres
\r * data waiting, so we wont ever get EAGAIN)
\r * The function GetCharId translates a single character
\r * back into an iterator.
\r */
\r if (read(this->GetFd(), &data, 1) > 0)
\r {
\r ConnMap::iterator iter = GetCharId(data);
\r if (iter != Connections.end())
\r {
\r /* Lock the mutex, send back the data */
\r pthread_mutex_lock(&results_mutex);
\r ResultQueue::iterator n = iter->second->rq.begin();
\r (*n)->Send();
\r iter->second->rq.pop_front();
\r pthread_mutex_unlock(&results_mutex);
\r return true;
\r }
\r /* No error, but unknown id */
\r return true;
\r }
\r\r /* Erk, error on descriptor! */
\r return false;
\r }
\r};
\r\r/** MySQL module
\r */
\rclass ModuleSQL : public Module
\r{
\r public:
\r \r ConfigReader *Conf;
\r InspIRCd* PublicServerInstance;
\r pthread_t Dispatcher;
\r int currid;
\r bool rehashing;
\r\r ModuleSQL(InspIRCd* Me)
\r : Module::Module(Me), rehashing(false)
\r {
\r ServerInstance->UseInterface("SQLutils");
\r\r Conf = new ConfigReader(ServerInstance);
\r PublicServerInstance = ServerInstance;
\r currid = 0;
\r SQLModule = this;
\r\r MessagePipe = new Notifier(ServerInstance);
\r \r pthread_attr_t attribs;
\r pthread_attr_init(&attribs);
\r pthread_attr_setdetachstate(&attribs, PTHREAD_CREATE_DETACHED);
\r if (pthread_create(&this->Dispatcher, &attribs, DispatcherThread, (void *)this) != 0)
\r {
\r throw ModuleException("m_mysql: Failed to create dispatcher thread: " + std::string(strerror(errno)));
\r }
\r\r if (!ServerInstance->PublishFeature("SQL", this))
\r {
\r /* Tell worker thread to exit NOW */
\r giveup = true;
\r throw ModuleException("m_mysql: Unable to publish feature 'SQL'");
\r }
\r\r ServerInstance->PublishInterface("SQL", this);
\r }
\r\r virtual ~ModuleSQL()
\r {
\r giveup = true;
\r ClearAllConnections();
\r DELETE(Conf);
\r ServerInstance->UnpublishInterface("SQL", this);
\r ServerInstance->UnpublishFeature("SQL");
\r ServerInstance->DoneWithInterface("SQLutils");
\r }
\r\r\r void Implements(char* List)
\r {
\r List[I_OnRehash] = List[I_OnRequest] = 1;
\r }
\r\r unsigned long NewID()
\r {
\r if (currid+1 == 0)
\r currid++;
\r return ++currid;
\r }
\r\r char* OnRequest(Request* request)
\r {
\r if(strcmp(SQLREQID, request->GetId()) == 0)
\r {
\r SQLrequest* req = (SQLrequest*)request;
\r\r /* XXX: Lock */
\r pthread_mutex_lock(&queue_mutex);
\r\r ConnMap::iterator iter;
\r\r char* returnval = NULL;
\r\r if((iter = Connections.find(req->dbid)) != Connections.end())
\r {
\r req->id = NewID();
\r iter->second->queue.push(*req);
\r returnval = SQLSUCCESS;
\r }
\r else
\r {
\r req->error.Id(BAD_DBID);
\r }
\r\r pthread_mutex_unlock(&queue_mutex);
\r /* XXX: Unlock */
\r\r return returnval;
\r }
\r\r return NULL;
\r }
\r\r virtual void OnRehash(userrec* user, const std::string ¶meter)
\r {
\r rehashing = true;
\r }
\r \r virtual Version GetVersion()
\r {
\r return Version(1,1,0,0,VF_VENDOR|VF_SERVICEPROVIDER,API_VERSION);
\r }
\r \r};
\r\rvoid* DispatcherThread(void* arg)
\r{
\r ModuleSQL* thismodule = (ModuleSQL*)arg;
\r LoadDatabases(thismodule->Conf, thismodule->PublicServerInstance);
\r\r /* Connect back to the Notifier */
\r\r if ((QueueFD = socket(AF_FAMILY, SOCK_STREAM, 0)) == -1)
\r {
\r /* crap, we're out of sockets... */
\r return NULL;
\r }
\r\r insp_sockaddr addr;
\r\r#ifdef IPV6
\r insp_aton("::1", &addr.sin6_addr);
\r addr.sin6_family = AF_FAMILY;
\r addr.sin6_port = htons(MessagePipe->GetPort());
\r#else
\r insp_inaddr ia;
\r insp_aton("127.0.0.1", &ia);
\r addr.sin_family = AF_FAMILY;
\r addr.sin_addr = ia;
\r addr.sin_port = htons(MessagePipe->GetPort());
\r#endif
\r\r if (connect(QueueFD, (sockaddr*)&addr,sizeof(addr)) == -1)
\r {
\r /* wtf, we cant connect to it, but we just created it! */
\r return NULL;
\r }
\r\r while (!giveup)
\r {
\r if (thismodule->rehashing)
\r {
\r /* XXX: Lock */
\r pthread_mutex_lock(&queue_mutex);
\r thismodule->rehashing = false;
\r LoadDatabases(thismodule->Conf, thismodule->PublicServerInstance);
\r pthread_mutex_unlock(&queue_mutex);
\r /* XXX: Unlock */
\r }
\r\r SQLConnection* conn = NULL;
\r /* XXX: Lock here for safety */
\r pthread_mutex_lock(&queue_mutex);
\r for (ConnMap::iterator i = Connections.begin(); i != Connections.end(); i++)
\r {
\r if (i->second->queue.totalsize())
\r {
\r conn = i->second;
\r break;
\r }
\r }
\r pthread_mutex_unlock(&queue_mutex);
\r /* XXX: Unlock */
\r\r /* Theres an item! */
\r if (conn)
\r {
\r conn->DoLeadingQuery();
\r\r /* XXX: Lock */
\r pthread_mutex_lock(&queue_mutex);
\r conn->queue.pop();
\r pthread_mutex_unlock(&queue_mutex);
\r /* XXX: Unlock */
\r }
\r\r usleep(50);
\r }
\r\r return NULL;
\r}
\r\rMODULE_INIT(ModuleSQL);
\r\r\ No newline at end of file
projects / user / henk / code / inspircd.git / blobdiff