--- /dev/null
+/* +------------------------------------+
+ * | Inspire Internet Relay Chat Daemon |
+ * +------------------------------------+
+ *
+ * InspIRCd is copyright (C) 2002-2004 ChatSpike-Dev.
+ * E-mail:
+ * <brain@chatspike.net>
+ * <Craig@chatspike.net>
+ * <omster@gmail.com>
+ *
+ * Written by Craig Edwards, Craig McLure, and others.
+ * This program is free but copyrighted software; see
+ * the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include <sstream>
+#include <string>
+#include <map>
+#include <libpq-fe.h>
+
+#include "users.h"
+#include "channels.h"
+#include "modules.h"
+#include "helperfuncs.h"
+#include "inspircd.h"
+#include "configreader.h"
+
+#include "m_sqlv2.h"
+
+/* $ModDesc: PostgreSQL Service Provider module for all other m_sql* modules, uses v2 of the SQL API */
+/* $CompileFlags: -I`pg_config --includedir` */
+/* $LinkerFlags: -L`pg_config --libdir` -lpq */
+
+/* UGH, UGH, UGH, UGH, UGH, UGH
+ * I'm having trouble seeing how I
+ * can avoid this. The core-defined
+ * constructors for InspSocket just
+ * aren't suitable...and if I'm
+ * reimplementing them I need this so
+ * I can access the socket engine :\
+ */
+extern InspIRCd* ServerInstance;
+InspSocket* socket_ref[MAX_DESCRIPTORS];
+
+/* Forward declare, so we can have the typedef neatly at the top */
+class SQLConn;
+
+typedef std::map<std::string, SQLConn*> ConnMap;
+
+/* CREAD, Connecting and wants read event
+ * CWRITE, Connecting and wants write event
+ * WREAD, Connected/Working and wants read event
+ * WWRITE, Connected/Working and wants write event
+ */
+enum SQLstatus { CREAD, CWRITE, WREAD, WWRITE };
+
+class SQLerror
+{
+public:
+ std::string err;
+
+ SQLerror(const std::string &s)
+ : err(s)
+ {
+ }
+};
+
+/** SQLConn represents one SQL session.
+ * Each session has its own persistent connection to the database.
+ * This is a subclass of InspSocket so it can easily recieve read/write events from the core socket
+ * engine, unlike the original MySQL module this module does not block. Ever. It gets a mild stabbing
+ * if it dares to.
+ */
+
+class SQLConn : public InspSocket
+{
+private:
+ Server* Srv; /* Server* for..uhm..something, maybe */
+ std::string dbhost; /* Database server hostname */
+ unsigned int dbport; /* Database server port */
+ std::string dbname; /* Database name */
+ std::string dbuser; /* Database username */
+ std::string dbpass; /* Database password */
+ bool ssl; /* If we should require SSL */
+ PGconn* sql; /* PgSQL database connection handle */
+ SQLstatus status; /* PgSQL database connection status */
+
+public:
+
+ /* This class should only ever be created inside this module, using this constructor, so we don't have to worry about the default ones */
+
+ SQLConn(Server* srv, const std::string &h, unsigned int p, const std::string &d, const std::string &u, const std::string &pwd, bool s)
+ : InspSocket::InspSocket(), Srv(srv), dbhost(h), dbport(p), dbname(d), dbuser(u), dbpass(pwd), ssl(s), sql(NULL), status(CWRITE)
+ {
+ 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());
+
+ /* Some of this could be reviewed, unsure if I need to fill 'host' etc...
+ * just copied this over from the InspSocket constructor.
+ */
+ strlcpy(this->host, dbhost.c_str(), MAXBUF);
+ this->port = dbport;
+
+ this->ClosePending = false;
+
+ if(!inet_aton(this->host, &this->addy))
+ {
+ /* Its not an ip, spawn the resolver.
+ * PgSQL doesn't do nonblocking DNS
+ * lookups, so we do it for it.
+ */
+
+ log(DEBUG,"Attempting to resolve %s", this->host);
+
+ this->dns.SetNS(Srv->GetConfig()->DNSServer);
+ this->dns.ForwardLookupWithFD(this->host, fd);
+
+ this->state = I_RESOLVING;
+ socket_ref[this->fd] = this;
+
+ return;
+ }
+ else
+ {
+ log(DEBUG,"No need to resolve %s", this->host);
+ strlcpy(this->IP, this->host, MAXBUF);
+
+ if(!this->DoConnect())
+ {
+ throw ModuleException("Connect failed");
+ }
+ }
+
+ exit(-1);
+ }
+
+ bool DoResolve()
+ {
+ log(DEBUG, "Checking for DNS lookup result");
+
+ if(this->dns.HasResult())
+ {
+ std::string res_ip = dns.GetResultIP();
+
+ if(res_ip.length())
+ {
+ log(DEBUG, "Got result: %s", res_ip.c_str());
+
+ strlcpy(this->IP, res_ip.c_str(), MAXBUF);
+ dbhost = res_ip;
+
+ socket_ref[this->fd] = NULL;
+
+ return this->DoConnect();
+ }
+ else
+ {
+ log(DEBUG, "DNS lookup failed, dying horribly");
+ DoError();
+ return false;
+ }
+ }
+ else
+ {
+ log(DEBUG, "No result for lookup yet!");
+ return true;
+ }
+
+ exit(-1);
+ }
+
+ bool DoConnect()
+ {
+ log(DEBUG, "SQLConn::DoConnect()");
+
+ if(!(sql = PQconnectStart(MkInfoStr().c_str())))
+ {
+ log(DEBUG, "Couldn't allocate PGconn structure, aborting: %s", PQerrorMessage(sql));
+ DoError();
+ return false;
+ }
+
+ if(PQstatus(sql) == CONNECTION_BAD)
+ {
+ log(DEBUG, "PQconnectStart failed: %s", PQerrorMessage(sql));
+ DoError();
+ return false;
+ }
+
+ ShowStatus();
+
+ if(PQsetnonblocking(sql, 1) == -1)
+ {
+ log(DEBUG, "Couldn't set connection nonblocking: %s", PQerrorMessage(sql));
+ DoError();
+ return false;
+ }
+
+ /* OK, we've initalised the connection, now to get it hooked into the socket engine
+ * and then start polling it.
+ */
+
+ log(DEBUG, "Old DNS socket: %d", this->fd);
+ this->fd = PQsocket(sql);
+ log(DEBUG, "New SQL socket: %d", this->fd);
+
+ if(this->fd <= -1)
+ {
+ log(DEBUG, "PQsocket says we have an invalid FD: %d", this->fd);
+ DoError();
+ return false;
+ }
+
+ this->state = I_CONNECTING;
+ ServerInstance->SE->AddFd(this->fd,false,X_ESTAB_MODULE);
+ socket_ref[this->fd] = this;
+
+ /* Socket all hooked into the engine, now to tell PgSQL to start connecting */
+
+ return DoPoll();
+ }
+
+ void DoError()
+ {
+ this->fd = -1;
+ this->state = I_ERROR;
+ this->OnError(I_ERR_SOCKET);
+ this->ClosePending = true;
+ log(DEBUG,"SQLConn::DoError");
+
+ if(sql)
+ {
+ PQfinish(sql);
+ sql = NULL;
+ }
+
+ return;
+ }
+
+ bool DoPoll()
+ {
+ switch(PQconnectPoll(sql))
+ {
+ case PGRES_POLLING_WRITING:
+ log(DEBUG, "PGconnectPoll: PGRES_POLLING_WRITING");
+ status = CWRITE;
+ DoPoll();
+ break;
+ case PGRES_POLLING_READING:
+ log(DEBUG, "PGconnectPoll: PGRES_POLLING_READING");
+ status = CREAD;
+ break;
+ case PGRES_POLLING_FAILED:
+ log(DEBUG, "PGconnectPoll: PGRES_POLLING_FAILED: %s", PQerrorMessage(sql));
+ DoError();
+ return false;
+ case PGRES_POLLING_OK:
+ log(DEBUG, "PGconnectPoll: PGRES_POLLING_OK");
+ status = WWRITE;
+ Query("SELECT * FROM rawr");
+ break;
+ default:
+ log(DEBUG, "PGconnectPoll: wtf?");
+ break;
+ }
+
+ return true;
+ }
+
+ void ShowStatus()
+ {
+ switch(PQstatus(sql))
+ {
+ case CONNECTION_STARTED:
+ log(DEBUG, "PQstatus: CONNECTION_STARTED: Waiting for connection to be made.");
+ break;
+
+ case CONNECTION_MADE:
+ log(DEBUG, "PQstatus: CONNECTION_MADE: Connection OK; waiting to send.");
+ break;
+
+ case CONNECTION_AWAITING_RESPONSE:
+ log(DEBUG, "PQstatus: CONNECTION_AWAITING_RESPONSE: Waiting for a response from the server.");
+ break;
+
+ case CONNECTION_AUTH_OK:
+ log(DEBUG, "PQstatus: CONNECTION_AUTH_OK: Received authentication; waiting for backend start-up to finish.");
+ break;
+
+ case CONNECTION_SSL_STARTUP:
+ log(DEBUG, "PQstatus: CONNECTION_SSL_STARTUP: Negotiating SSL encryption.");
+ break;
+
+ case CONNECTION_SETENV:
+ log(DEBUG, "PQstatus: CONNECTION_SETENV: Negotiating environment-driven parameter settings.");
+ break;
+
+ default:
+ log(DEBUG, "PQstatus: ???");
+ }
+ }
+
+ virtual void OnTimeout()
+ {
+ /* Unused, I think */
+ }
+
+ virtual bool OnDataReady()
+ {
+ /* Always return true here, false would close the socket - we need to do that ourselves with the pgsql API */
+ log(DEBUG, "OnDataReady(): status = %s", StatusStr());
+
+ return DoEvent();
+ }
+
+ virtual bool OnConnected()
+ {
+ log(DEBUG, "OnConnected(): status = %s", StatusStr());
+
+ return DoEvent();
+ }
+
+ bool DoEvent()
+ {
+ if((status == CREAD) || (status == CWRITE))
+ {
+ DoPoll();
+ }
+ else
+ {
+ if(PQconsumeInput(sql))
+ {
+ log(DEBUG, "PQconsumeInput succeeded");
+
+ if(PQisBusy(sql))
+ {
+ log(DEBUG, "Still busy processing command though");
+ }
+ else
+ {
+ log(DEBUG, "Looks like we have a result to process!");
+
+ while(PGresult* result = PQgetResult(sql))
+ {
+ int cols = PQnfields(result);
+
+ log(DEBUG, "Got result! :D");
+ log(DEBUG, "%d rows, %d columns checking now what the column names are", PQntuples(result), cols);
+
+ for(int i = 0; i < cols; i++)
+ {
+ log(DEBUG, "Column name: %s (%d)", PQfname(result, i));
+ }
+
+ PQclear(result);
+ }
+ }
+ }
+ else
+ {
+ log(DEBUG, "PQconsumeInput failed: %s", PQerrorMessage(sql));
+ }
+ }
+
+ return true;
+ }
+
+ virtual void OnClose()
+ {
+ /* Close PgSQL connection */
+ }
+
+ virtual void OnError(InspSocketError e)
+ {
+ /* Unsure if we need this, we should be reading/writing via the PgSQL API rather than the insp one... */
+ }
+
+ std::string MkInfoStr()
+ {
+ /* XXX - This needs nonblocking DNS lookups */
+
+ std::ostringstream conninfo("connect_timeout = '2'");
+
+ if(dbhost.length())
+ conninfo << " hostaddr = '" << dbhost << "'";
+
+ if(dbport)
+ conninfo << " port = '" << dbport << "'";
+
+ if(dbname.length())
+ conninfo << " dbname = '" << dbname << "'";
+
+ if(dbuser.length())
+ conninfo << " user = '" << dbuser << "'";
+
+ if(dbpass.length())
+ conninfo << " password = '" << dbpass << "'";
+
+ if(ssl)
+ conninfo << " sslmode = 'require'";
+
+ return conninfo.str();
+ }
+
+ const char* StatusStr()
+ {
+ if(status == CREAD) return "CREAD";
+ if(status == CWRITE) return "CWRITE";
+ if(status == WREAD) return "WREAD";
+ if(status == WWRITE) return "WWRITE";
+ }
+
+ bool Query(const std::string &query)
+ {
+ if((status == WREAD) || (status == WWRITE))
+ {
+ if(PQsendQuery(sql, query.c_str()))
+ {
+ log(DEBUG, "Dispatched query: %s", query.c_str());
+ return true;
+ }
+ else
+ {
+ log(DEBUG, "Failed to dispatch query: %s", PQerrorMessage(sql));
+ return false;
+ }
+ }
+ else
+ {
+ log(DEBUG, "Can't query until connection is complete");
+ return false;
+ }
+ }
+};
+
+class ModulePgSQL : public Module
+{
+private:
+ Server* Srv;
+ ConnMap connections;
+
+public:
+ ModulePgSQL(Server* Me)
+ : Module::Module(Me), Srv(Me)
+ {
+ OnRehash("");
+ }
+
+ void Implements(char* List)
+ {
+ List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCheckReady] = List[I_OnUserDisconnect] = 1;
+ }
+
+ virtual void OnRehash(const std::string ¶meter)
+ {
+ ConfigReader conf;
+
+ /* Delete all the SQLConn objects in the connection lists,
+ * this will call their destructors where they can handle
+ * closing connections and such.
+ */
+ for(ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
+ {
+ DELETE(iter->second);
+ }
+
+ /* Empty out our list of connections */
+ connections.clear();
+
+ for(int i = 0; i < conf.Enumerate("database"); i++)
+ {
+ std::string id;
+ SQLConn* newconn;
+
+ id = conf.ReadValue("database", "id", i);
+ newconn = new SQLConn(Srv, conf.ReadValue("database", "hostname", i),
+ conf.ReadInteger("database", "port", i, true),
+ conf.ReadValue("database", "name", i),
+ conf.ReadValue("database", "username", i),
+ conf.ReadValue("database", "password", i),
+ conf.ReadFlag("database", "ssl", i));
+
+ connections.insert(std::make_pair(id, newconn));
+ }
+ }
+
+ virtual Version GetVersion()
+ {
+ return Version(1, 0, 0, 0, VF_VENDOR|VF_SERVICEPROVIDER);
+ }
+
+ virtual ~ModulePgSQL()
+ {
+ }
+};
+
+class ModulePgSQLFactory : public ModuleFactory
+{
+ public:
+ ModulePgSQLFactory()
+ {
+ }
+
+ ~ModulePgSQLFactory()
+ {
+ }
+
+ virtual Module * CreateModule(Server* Me)
+ {
+ return new ModulePgSQL(Me);
+ }
+};
+
+
+extern "C" void * init_module( void )
+{
+ return new ModulePgSQLFactory;
+}
projects / user / henk / code / inspircd.git / commitdiff