1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd is copyright (C) 2002-2004 ChatSpike-Dev.
7 * <brain@chatspike.net>
8 * <Craig@chatspike.net>
11 * Written by Craig Edwards, Craig McLure, and others.
12 * This program is free but copyrighted software; see
13 * the file COPYING for details.
15 * ---------------------------------------------------
30 #include "configreader.h"
34 /* $ModDesc: PostgreSQL Service Provider module for all other m_sql* modules, uses v2 of the SQL API */
35 /* $CompileFlags: -I`pg_config --includedir` `perl extra/pgsql_config.pl` */
36 /* $LinkerFlags: -L`pg_config --libdir` -lpq */
38 /* UGH, UGH, UGH, UGH, UGH, UGH
39 * I'm having trouble seeing how I
40 * can avoid this. The core-defined
41 * constructors for InspSocket just
42 * aren't suitable...and if I'm
43 * reimplementing them I need this so
44 * I can access the socket engine :\
47 /* Forward declare, so we can have the typedef neatly at the top */
49 /* Also needs forward declaration, as it's used inside SQLconn */
52 typedef std::map<std::string, SQLConn*> ConnMap;
54 /* CREAD, Connecting and wants read event
55 * CWRITE, Connecting and wants write event
56 * WREAD, Connected/Working and wants read event
57 * WWRITE, Connected/Working and wants write event
58 * RREAD, Resetting and wants read event
59 * RWRITE, Resetting and wants write event
61 enum SQLstatus { CREAD, CWRITE, WREAD, WWRITE, RREAD, RWRITE };
63 /** SQLhost, simple structure to store information about a SQL-connection-to-be
64 * We use this struct simply to make it neater passing around host information
65 * when we're creating connections and resolving hosts.
66 * Rather than giving SQLresolver a parameter for every field here so it can in
67 * turn call SQLConn's constructor with them all, both can simply use a SQLhost.
72 std::string id; /* Database handle id */
73 std::string host; /* Database server hostname */
74 unsigned int port; /* Database server port */
75 std::string name; /* Database name */
76 std::string user; /* Database username */
77 std::string pass; /* Database password */
78 bool ssl; /* If we should require SSL */
84 SQLhost(const std::string& i, const std::string& h, unsigned int p, const std::string& n, const std::string& u, const std::string& pa, bool s)
85 : id(i), host(h), port(p), name(n), user(u), pass(pa), ssl(s)
90 /** Used to resolve sql server hostnames
92 class SQLresolver : public Resolver
98 SQLresolver(ModulePgSQL* m, InspIRCd* Instance, const SQLhost& hi)
99 : Resolver(Instance, hi.host, DNS_QUERY_FORWARD, (Module*)m), host(hi), mod(m)
103 virtual void OnLookupComplete(const std::string &result);
105 virtual void OnError(ResolverError e, const std::string &errormessage)
107 ServerInstance->Log(DEBUG, "DNS lookup failed (%s), dying horribly", errormessage.c_str());
110 virtual ~SQLresolver()
115 /** QueryQueue, a queue of queries waiting to be executed.
116 * This maintains two queues internally, one for 'priority'
117 * queries and one for less important ones. Each queue has
118 * new queries appended to it and ones to execute are popped
119 * off the front. This keeps them flowing round nicely and no
120 * query should ever get 'stuck' for too long. If there are
121 * queries in the priority queue they will be executed first,
122 * 'unimportant' queries will only be executed when the
123 * priority queue is empty.
125 * We store lists of SQLrequest's here, by value as we want to avoid storing
126 * any data allocated inside the client module (in case that module is unloaded
127 * while the query is in progress).
129 * Because we want to work on the current SQLrequest in-situ, we need a way
130 * of accessing the request we are currently processing, QueryQueue::front(),
131 * but that call needs to always return the same request until that request
132 * is removed from the queue, this is what the 'which' variable is. New queries are
133 * always added to the back of one of the two queues, but if when front()
134 * is first called then the priority queue is empty then front() will return
135 * a query from the normal queue, but if a query is then added to the priority
136 * queue then front() must continue to return the front of the *normal* queue
137 * until pop() is called.
140 class QueryQueue : public classbase
143 typedef std::deque<SQLrequest> ReqDeque;
145 ReqDeque priority; /* The priority queue */
146 ReqDeque normal; /* The 'normal' queue */
147 enum { PRI, NOR, NON } which; /* Which queue the currently active element is at the front of */
155 void push(const SQLrequest &q)
157 //ServerInstance->Log(DEBUG, "QueryQueue::push(): Adding %s query to queue: %s", ((q.pri) ? "priority" : "non-priority"), q.query.q.c_str());
160 priority.push_back(q);
167 if((which == PRI) && priority.size())
169 priority.pop_front();
171 else if((which == NOR) && normal.size())
179 /* Silently do nothing if there was no element to pop() */
187 return priority.front();
189 return normal.front();
194 return priority.front();
200 return normal.front();
203 /* This will probably result in a segfault,
204 * but the caller should have checked totalsize()
205 * first so..meh - moron :p
208 return priority.front();
212 std::pair<int, int> size()
214 return std::make_pair(priority.size(), normal.size());
219 return priority.size() + normal.size();
222 void PurgeModule(Module* mod)
224 DoPurgeModule(mod, priority);
225 DoPurgeModule(mod, normal);
229 void DoPurgeModule(Module* mod, ReqDeque& q)
231 for(ReqDeque::iterator iter = q.begin(); iter != q.end(); iter++)
233 if(iter->GetSource() == mod)
235 if(iter->id == front().id)
237 /* It's the currently active query.. :x */
238 iter->SetSource(NULL);
242 /* It hasn't been executed yet..just remove it */
243 iter = q.erase(iter);
250 /** PgSQLresult is a subclass of the mostly-pure-virtual class SQLresult.
251 * All SQL providers must create their own subclass and define it's methods using that
252 * database library's data retriveal functions. The aim is to avoid a slow and inefficient process
253 * of converting all data to a common format before it reaches the result structure. This way
254 * data is passes to the module nearly as directly as if it was using the API directly itself.
257 class PgSQLresult : public SQLresult
264 SQLfieldList* fieldlist;
265 SQLfieldMap* fieldmap;
267 PgSQLresult(Module* self, Module* to, unsigned long id, PGresult* result)
268 : SQLresult(self, to, id), res(result), currentrow(0), fieldlist(NULL), fieldmap(NULL)
270 rows = PQntuples(res);
271 cols = PQnfields(res);
273 //ServerInstance->Log(DEBUG, "Created new PgSQL result; %d rows, %d columns, %s affected", rows, cols, PQcmdTuples(res));
278 /* If we allocated these, free them... */
292 return atoi(PQcmdTuples(res));
302 return PQnfields(res);
305 virtual std::string ColName(int column)
307 char* name = PQfname(res, column);
309 return (name) ? name : "";
312 virtual int ColNum(const std::string &column)
314 int n = PQfnumber(res, column.c_str());
318 throw SQLbadColName();
326 virtual SQLfield GetValue(int row, int column)
328 char* v = PQgetvalue(res, row, column);
332 return SQLfield(std::string(v, PQgetlength(res, row, column)), PQgetisnull(res, row, column));
336 //ServerInstance->Log(DEBUG, "PQgetvalue returned a null pointer..nobody wants to tell us what this means");
337 throw SQLbadColName();
341 virtual SQLfieldList& GetRow()
343 /* In an effort to reduce overhead we don't actually allocate the list
344 * until the first time it's needed...so...
352 fieldlist = new SQLfieldList;
355 if(currentrow < PQntuples(res))
357 int cols = PQnfields(res);
359 for(int i = 0; i < cols; i++)
361 fieldlist->push_back(GetValue(currentrow, i));
370 virtual SQLfieldMap& GetRowMap()
372 /* In an effort to reduce overhead we don't actually allocate the map
373 * until the first time it's needed...so...
381 fieldmap = new SQLfieldMap;
384 if(currentrow < PQntuples(res))
386 int cols = PQnfields(res);
388 for(int i = 0; i < cols; i++)
390 fieldmap->insert(std::make_pair(ColName(i), GetValue(currentrow, i)));
399 virtual SQLfieldList* GetRowPtr()
401 SQLfieldList* fl = new SQLfieldList;
403 if(currentrow < PQntuples(res))
405 int cols = PQnfields(res);
407 for(int i = 0; i < cols; i++)
409 fl->push_back(GetValue(currentrow, i));
418 virtual SQLfieldMap* GetRowMapPtr()
420 SQLfieldMap* fm = new SQLfieldMap;
422 if(currentrow < PQntuples(res))
424 int cols = PQnfields(res);
426 for(int i = 0; i < cols; i++)
428 fm->insert(std::make_pair(ColName(i), GetValue(currentrow, i)));
437 virtual void Free(SQLfieldMap* fm)
442 virtual void Free(SQLfieldList* fl)
448 /** SQLConn represents one SQL session.
449 * Each session has its own persistent connection to the database.
450 * This is a subclass of InspSocket so it can easily recieve read/write events from the core socket
451 * engine, unlike the original MySQL module this module does not block. Ever. It gets a mild stabbing
455 class SQLConn : public InspSocket
458 ModulePgSQL* us; /* Pointer to the SQL provider itself */
459 std::string dbhost; /* Database server hostname */
460 unsigned int dbport; /* Database server port */
461 std::string dbname; /* Database name */
462 std::string dbuser; /* Database username */
463 std::string dbpass; /* Database password */
464 bool ssl; /* If we should require SSL */
465 PGconn* sql; /* PgSQL database connection handle */
466 SQLstatus status; /* PgSQL database connection status */
467 bool qinprog;/* If there is currently a query in progress */
468 QueryQueue queue; /* Queue of queries waiting to be executed on this connection */
469 time_t idle; /* Time we last heard from the database */
473 /* This class should only ever be created inside this module, using this constructor, so we don't have to worry about the default ones */
475 SQLConn(InspIRCd* SI, ModulePgSQL* self, const SQLhost& hostinfo);
481 virtual void Close();
485 bool DoConnectedPoll();
491 virtual bool OnDataReady();
493 virtual bool OnWriteReady();
495 virtual bool OnConnected();
501 std::string MkInfoStr();
503 const char* StatusStr();
505 SQLerror DoQuery(SQLrequest &req);
507 SQLerror Query(const SQLrequest &req);
509 void OnUnloadModule(Module* mod);
512 class ModulePgSQL : public Module
517 unsigned long currid;
521 ModulePgSQL(InspIRCd* Me)
522 : Module::Module(Me), currid(0)
524 ServerInstance->Log(DEBUG, "%s 'SQL' feature", ServerInstance->PublishFeature("SQL", this) ? "Published" : "Couldn't publish");
526 sqlsuccess = new char[strlen(SQLSUCCESS)+1];
528 strlcpy(sqlsuccess, SQLSUCCESS, strlen(SQLSUCCESS)+1);
533 void Implements(char* List)
535 List[I_OnUnloadModule] = List[I_OnRequest] = List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCheckReady] = List[I_OnUserDisconnect] = 1;
538 virtual void OnRehash(const std::string ¶meter)
540 ConfigReader conf(ServerInstance);
542 /* Delete all the SQLConn objects in the connection lists,
543 * this will call their destructors where they can handle
544 * closing connections and such.
546 for(ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
548 DELETE(iter->second);
551 /* Empty out our list of connections */
554 for(int i = 0; i < conf.Enumerate("database"); i++)
560 host.id = conf.ReadValue("database", "id", i);
561 host.host = conf.ReadValue("database", "hostname", i);
562 host.port = conf.ReadInteger("database", "port", i, true);
563 host.name = conf.ReadValue("database", "name", i);
564 host.user = conf.ReadValue("database", "username", i);
565 host.pass = conf.ReadValue("database", "password", i);
566 host.ssl = conf.ReadFlag("database", "ssl", i);
568 ipvalid = insp_aton(host.host.c_str(), &blargle);
572 /* The conversion succeeded, we were given an IP and we can give it straight to SQLConn */
575 else if(ipvalid == 0)
577 /* Conversion failed, assume it's a host */
578 SQLresolver* resolver;
582 resolver = new SQLresolver(this, ServerInstance, host);
584 ServerInstance->AddResolver(resolver);
588 ServerInstance->Log(DEBUG, "Couldn't make a SQLresolver..this connection is gonna diiiiiie...actually we just won't create it");
593 /* Invalid address family, die horribly. */
594 ServerInstance->Log(DEBUG, "insp_aton failed returning -1, oh noes.");
599 void AddConn(const SQLhost& hi)
603 /* The conversion succeeded, we were given an IP and we can give it straight to SQLConn */
604 newconn = new SQLConn(ServerInstance, this, hi);
606 connections.insert(std::make_pair(hi.id, newconn));
609 virtual char* OnRequest(Request* request)
611 if(strcmp(SQLREQID, request->GetId()) == 0)
613 SQLrequest* req = (SQLrequest*)request;
614 ConnMap::iterator iter;
616 ServerInstance->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());
618 if((iter = connections.find(req->dbid)) != connections.end())
622 req->error = iter->second->Query(*req);
624 return (req->error.Id() == NO_ERROR) ? sqlsuccess : NULL;
628 req->error.Id(BAD_DBID);
633 ServerInstance->Log(DEBUG, "Got unsupported API version string: %s", request->GetId());
638 virtual void OnUnloadModule(Module* mod, const std::string& name)
640 /* When a module unloads we have to check all the pending queries for all our connections
641 * and set the Module* specifying where the query came from to NULL. If the query has already
642 * been dispatched then when it is processed it will be dropped if the pointer is NULL.
644 * If the queries we find are not already being executed then we can simply remove them immediately.
646 for(ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
648 iter->second->OnUnloadModule(mod);
652 unsigned long NewID()
660 virtual Version GetVersion()
662 return Version(1, 1, 0, 0, VF_VENDOR|VF_SERVICEPROVIDER, API_VERSION);
665 virtual ~ModulePgSQL()
671 SQLConn::SQLConn(InspIRCd* SI, ModulePgSQL* self, const SQLhost& hi)
672 : InspSocket::InspSocket(SI), us(self), dbhost(hi.host), dbport(hi.port), dbname(hi.name), dbuser(hi.user), dbpass(hi.pass), ssl(hi.ssl), sql(NULL), status(CWRITE), qinprog(false)
674 //ServerInstance->Log(DEBUG, "Creating new PgSQL connection to database %s on %s:%u (%s/%s)", dbname.c_str(), dbhost.c_str(), dbport, dbuser.c_str(), dbpass.c_str());
676 /* Some of this could be reviewed, unsure if I need to fill 'host' etc...
677 * just copied this over from the InspSocket constructor.
679 strlcpy(this->host, dbhost.c_str(), MAXBUF);
680 strlcpy(this->IP, dbhost.c_str(), MAXBUF);
682 idle = this->Instance->Time();
684 this->ClosePending = false;
686 Instance->Log(DEBUG,"No need to resolve %s", this->host);
689 if(!this->DoConnect())
691 throw ModuleException("Connect failed");
700 bool SQLConn::DoConnect()
702 //ServerInstance->Log(DEBUG, "SQLConn::DoConnect()");
704 if(!(sql = PQconnectStart(MkInfoStr().c_str())))
706 Instance->Log(DEBUG, "Couldn't allocate PGconn structure, aborting: %s", PQerrorMessage(sql));
711 if(PQstatus(sql) == CONNECTION_BAD)
713 Instance->Log(DEBUG, "PQconnectStart failed: %s", PQerrorMessage(sql));
720 if(PQsetnonblocking(sql, 1) == -1)
722 Instance->Log(DEBUG, "Couldn't set connection nonblocking: %s", PQerrorMessage(sql));
727 /* OK, we've initalised the connection, now to get it hooked into the socket engine
728 * and then start polling it.
731 //ServerInstance->Log(DEBUG, "Old DNS socket: %d", this->fd);
732 this->fd = PQsocket(sql);
733 Instance->Log(DEBUG, "New SQL socket: %d", this->fd);
737 Instance->Log(DEBUG, "PQsocket says we have an invalid FD: %d", this->fd);
742 this->state = I_CONNECTING;
743 if (!this->Instance->SE->AddFd(this))
745 Instance->Log(DEBUG, "A PQsocket cant be added to the socket engine!");
750 /* Socket all hooked into the engine, now to tell PgSQL to start connecting */
755 void SQLConn::Close()
757 Instance->Log(DEBUG,"SQLConn::Close");
760 this->state = I_ERROR;
761 this->OnError(I_ERR_SOCKET);
762 this->ClosePending = true;
773 bool SQLConn::DoPoll()
775 switch(PQconnectPoll(sql))
777 case PGRES_POLLING_WRITING:
778 //ServerInstance->Log(DEBUG, "PGconnectPoll: PGRES_POLLING_WRITING");
782 case PGRES_POLLING_READING:
783 //ServerInstance->Log(DEBUG, "PGconnectPoll: PGRES_POLLING_READING");
786 case PGRES_POLLING_FAILED:
787 //ServerInstance->Log(DEBUG, "PGconnectPoll: PGRES_POLLING_FAILED: %s", PQerrorMessage(sql));
789 case PGRES_POLLING_OK:
790 //ServerInstance->Log(DEBUG, "PGconnectPoll: PGRES_POLLING_OK");
792 return DoConnectedPoll();
794 //ServerInstance->Log(DEBUG, "PGconnectPoll: wtf?");
799 bool SQLConn::DoConnectedPoll()
801 if(!qinprog && queue.totalsize())
803 /* There's no query currently in progress, and there's queries in the queue. */
804 SQLrequest& query = queue.front();
808 if(PQconsumeInput(sql))
810 Instance->Log(DEBUG, "PQconsumeInput succeeded");
812 /* We just read stuff from the server, that counts as it being alive
813 * so update the idle-since time :p
815 idle = this->Instance->Time();
819 //ServerInstance->Log(DEBUG, "Still busy processing command though");
823 //ServerInstance->Log(DEBUG, "Looks like we have a result to process!");
825 /* Grab the request we're processing */
826 SQLrequest& query = queue.front();
828 Instance->Log(DEBUG, "ID is %lu", query.id);
830 /* Get a pointer to the module we're about to return the result to */
831 Module* to = query.GetSource();
833 /* Fetch the result.. */
834 PGresult* result = PQgetResult(sql);
836 /* PgSQL would allow a query string to be sent which has multiple
837 * queries in it, this isn't portable across database backends and
838 * we don't want modules doing it. But just in case we make sure we
839 * drain any results there are and just use the last one.
840 * If the module devs are behaving there will only be one result.
842 while (PGresult* temp = PQgetResult(sql))
850 /* ..and the result */
851 PgSQLresult reply(us, to, query.id, result);
853 /* Fix by brain, make sure the original query gets sent back in the reply */
854 reply.query = query.query.q;
856 Instance->Log(DEBUG, "Got result, status code: %s; error message: %s", PQresStatus(PQresultStatus(result)), PQresultErrorMessage(result));
858 switch(PQresultStatus(result))
860 case PGRES_EMPTY_QUERY:
861 case PGRES_BAD_RESPONSE:
862 case PGRES_FATAL_ERROR:
863 reply.error.Id(QREPLY_FAIL);
864 reply.error.Str(PQresultErrorMessage(result));
866 /* No action, other values are not errors */
871 /* PgSQLresult's destructor will free the PGresult */
875 /* If the client module is unloaded partway through a query then the provider will set
876 * the pointer to NULL. We cannot just cancel the query as the result will still come
877 * through at some point...and it could get messy if we play with invalid pointers...
879 Instance->Log(DEBUG, "Looks like we're handling a zombie query from a module which unloaded before it got a result..fun. ID: %lu", query.id);
889 Instance->Log(DEBUG, "Eh!? We just got a read event, and connection isn't busy..but no result :(");
896 /* I think we'll assume this means the server died...it might not,
897 * but I think that any error serious enough we actually get here
898 * deserves to reconnect [/excuse]
899 * Returning true so the core doesn't try and close the connection.
901 Instance->Log(DEBUG, "PQconsumeInput failed: %s", PQerrorMessage(sql));
907 bool SQLConn::DoResetPoll()
909 switch(PQresetPoll(sql))
911 case PGRES_POLLING_WRITING:
912 //ServerInstance->Log(DEBUG, "PGresetPoll: PGRES_POLLING_WRITING");
916 case PGRES_POLLING_READING:
917 //ServerInstance->Log(DEBUG, "PGresetPoll: PGRES_POLLING_READING");
920 case PGRES_POLLING_FAILED:
921 //ServerInstance->Log(DEBUG, "PGresetPoll: PGRES_POLLING_FAILED: %s", PQerrorMessage(sql));
923 case PGRES_POLLING_OK:
924 //ServerInstance->Log(DEBUG, "PGresetPoll: PGRES_POLLING_OK");
926 return DoConnectedPoll();
928 //ServerInstance->Log(DEBUG, "PGresetPoll: wtf?");
933 void SQLConn::ShowStatus()
935 switch(PQstatus(sql))
937 case CONNECTION_STARTED:
938 Instance->Log(DEBUG, "PQstatus: CONNECTION_STARTED: Waiting for connection to be made.");
941 case CONNECTION_MADE:
942 Instance->Log(DEBUG, "PQstatus: CONNECTION_MADE: Connection OK; waiting to send.");
945 case CONNECTION_AWAITING_RESPONSE:
946 Instance->Log(DEBUG, "PQstatus: CONNECTION_AWAITING_RESPONSE: Waiting for a response from the server.");
949 case CONNECTION_AUTH_OK:
950 Instance->Log(DEBUG, "PQstatus: CONNECTION_AUTH_OK: Received authentication; waiting for backend start-up to finish.");
953 case CONNECTION_SSL_STARTUP:
954 Instance->Log(DEBUG, "PQstatus: CONNECTION_SSL_STARTUP: Negotiating SSL encryption.");
957 case CONNECTION_SETENV:
958 Instance->Log(DEBUG, "PQstatus: CONNECTION_SETENV: Negotiating environment-driven parameter settings.");
962 Instance->Log(DEBUG, "PQstatus: ???");
966 bool SQLConn::OnDataReady()
968 /* Always return true here, false would close the socket - we need to do that ourselves with the pgsql API */
969 Instance->Log(DEBUG, "OnDataReady(): status = %s", StatusStr());
974 bool SQLConn::OnWriteReady()
976 /* Always return true here, false would close the socket - we need to do that ourselves with the pgsql API */
977 Instance->Log(DEBUG, "OnWriteReady(): status = %s", StatusStr());
982 bool SQLConn::OnConnected()
984 Instance->Log(DEBUG, "OnConnected(): status = %s", StatusStr());
989 bool SQLConn::Reconnect()
991 Instance->Log(DEBUG, "Initiating reconnect");
993 if(PQresetStart(sql))
995 /* Successfully initiatied database reconnect,
996 * set flags so PQresetPoll() will be called appropriately
1004 Instance->Log(DEBUG, "Failed to initiate reconnect...fun");
1009 bool SQLConn::DoEvent()
1013 if((status == CREAD) || (status == CWRITE))
1017 else if((status == RREAD) || (status == RWRITE))
1019 ret = DoResetPoll();
1023 ret = DoConnectedPoll();
1026 switch(PQflush(sql))
1029 Instance->Log(DEBUG, "Error flushing write queue: %s", PQerrorMessage(sql));
1032 Instance->Log(DEBUG, "Successfully flushed write queue (or there was nothing to write)");
1035 Instance->Log(DEBUG, "Not all of the write queue written, triggering write event so we can have another go");
1043 std::string SQLConn::MkInfoStr()
1045 std::ostringstream conninfo("connect_timeout = '2'");
1048 conninfo << " hostaddr = '" << dbhost << "'";
1051 conninfo << " port = '" << dbport << "'";
1054 conninfo << " dbname = '" << dbname << "'";
1057 conninfo << " user = '" << dbuser << "'";
1060 conninfo << " password = '" << dbpass << "'";
1063 conninfo << " sslmode = 'require'";
1065 return conninfo.str();
1068 const char* SQLConn::StatusStr()
1070 if(status == CREAD) return "CREAD";
1071 if(status == CWRITE) return "CWRITE";
1072 if(status == WREAD) return "WREAD";
1073 if(status == WWRITE) return "WWRITE";
1074 return "Err...what, erm..BUG!";
1077 SQLerror SQLConn::DoQuery(SQLrequest &req)
1079 if((status == WREAD) || (status == WWRITE))
1083 /* Parse the command string and dispatch it */
1085 /* Pointer to the buffer we screw around with substitution in */
1087 /* Pointer to the current end of query, where we append new stuff */
1089 /* Total length of the unescaped parameters */
1090 unsigned int paramlen;
1094 for(ParamL::iterator i = req.query.p.begin(); i != req.query.p.end(); i++)
1096 paramlen += i->size();
1099 /* To avoid a lot of allocations, allocate enough memory for the biggest the escaped query could possibly be.
1100 * sizeofquery + (totalparamlength*2) + 1
1102 * The +1 is for null-terminating the string for PQsendQuery()
1105 query = new char[req.query.q.length() + (paramlen*2)];
1108 /* Okay, now we have a buffer large enough we need to start copying the query into it and escaping and substituting
1109 * the parameters into it...
1112 for(unsigned int i = 0; i < req.query.q.length(); i++)
1114 if(req.query.q[i] == '?')
1116 /* We found a place to substitute..what fun.
1117 * Use the PgSQL calls to escape and write the
1118 * escaped string onto the end of our query buffer,
1119 * then we "just" need to make sure queryend is
1120 * pointing at the right place.
1123 if(req.query.p.size())
1128 #ifdef PGSQL_HAS_ESCAPECONN
1129 len = PQescapeStringConn(sql, queryend, req.query.p.front().c_str(), req.query.p.front().length(), &error);
1131 len = PQescapeString (queryend, req.query.p.front().c_str(), req.query.p.front().length());
1135 Instance->Log(DEBUG, "Apparently PQescapeStringConn() failed somehow...don't know how or what to do...");
1138 Instance->Log(DEBUG, "Appended %d bytes of escaped string onto the query", len);
1140 /* Incremenet queryend to the end of the newly escaped parameter */
1143 /* Remove the parameter we just substituted in */
1144 req.query.p.pop_front();
1148 Instance->Log(DEBUG, "Found a substitution location but no parameter to substitute :|");
1154 *queryend = req.query.q[i];
1159 /* Null-terminate the query */
1162 Instance->Log(DEBUG, "Attempting to dispatch query: %s", query);
1164 req.query.q = query;
1166 if(PQsendQuery(sql, query))
1168 Instance->Log(DEBUG, "Dispatched query successfully");
1175 Instance->Log(DEBUG, "Failed to dispatch query: %s", PQerrorMessage(sql));
1177 return SQLerror(QSEND_FAIL, PQerrorMessage(sql));
1182 Instance->Log(DEBUG, "Can't query until connection is complete");
1183 return SQLerror(BAD_CONN, "Can't query until connection is complete");
1186 SQLerror SQLConn::Query(const SQLrequest &req)
1190 if(!qinprog && queue.totalsize())
1192 /* There's no query currently in progress, and there's queries in the queue. */
1193 SQLrequest& query = queue.front();
1194 return DoQuery(query);
1202 void SQLConn::OnUnloadModule(Module* mod)
1204 queue.PurgeModule(mod);
1207 void SQLresolver::OnLookupComplete(const std::string &result)
1213 class ModulePgSQLFactory : public ModuleFactory
1216 ModulePgSQLFactory()
1220 ~ModulePgSQLFactory()
1224 virtual Module * CreateModule(InspIRCd* Me)
1226 return new ModulePgSQL(Me);
1231 extern "C" void * init_module( void )
1233 return new ModulePgSQLFactory;