Experimental support for Microsoft SQL Server. Might crash and burn alot. Appreciate backtraces with full debuginfo if you run this.

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@9105 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 770 insertions, 0 deletions

diff --git a/src/modules/extra/m_mssql.cpp b/src/modules/extra/m_mssql.cpp
new file mode 100644
index 000000000..853651e1c
--- /dev/null
+++ b/src/modules/extra/m_mssql.cpp
@@ -0,0 +1,770 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "inspircd.h"
+#include <tds.h>
+#include <tdsconvert.h>
+#include "users.h"
+#include "channels.h"
+#include "modules.h"
+
+#include "m_sqlv2.h"
+
+/* $ModDesc: MsSQL provider */
+/* $LinkerFlags: -ltds */
+/* $ModDep: m_sqlv2.h */
+
+class SQLConn;
+class MsSQLResult;
+class ResultNotifier;
+
+typedef std::map<std::string, SQLConn*> ConnMap;
+typedef std::deque<classbase*> paramlist;
+typedef std::deque<MsSQLResult*> ResultQueue;
+
+ResultNotifier* resultnotify = NULL;
+
+
+class ResultNotifier : public BufferedSocket
+{
+	Module* mod;
+	insp_sockaddr sock_us;
+	socklen_t uslen;
+
+ public:
+	/* Create a socket on a random port. Let the tcp stack allocate us an available port */
+#ifdef IPV6
+	ResultNotifier(InspIRCd* SI, Module* m) : BufferedSocket(SI, "::1", 0, true, 3000), mod(m)
+#else
+	ResultNotifier(InspIRCd* SI, Module* m) : BufferedSocket(SI, "127.0.0.1", 0, true, 3000), mod(m)
+#endif
+	{
+		uslen = sizeof(sock_us);
+		if (getsockname(this->fd,(sockaddr*)&sock_us,&uslen))
+		{
+			throw ModuleException("Could not create random listening port on localhost");
+		}
+	}
+
+	ResultNotifier(InspIRCd* SI, Module* m, int newfd, char* ip) : BufferedSocket(SI, newfd, ip), mod(m)
+	{
+	}
+
+	/* 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)
+	{
+		Dispatch();
+		return false;
+	}
+
+	void Dispatch();
+};
+
+
+class MsSQLResult : public SQLresult
+{
+  private:
+	int currentrow;
+	int rows;
+	int cols;
+
+	std::vector<std::string> colnames;
+	std::vector<SQLfieldList> fieldlists;
+	SQLfieldList emptyfieldlist;
+
+	SQLfieldList* fieldlist;
+	SQLfieldMap* fieldmap;
+
+  public:
+	MsSQLResult(Module* self, Module* to, unsigned int rid)
+	: SQLresult(self, to, rid), currentrow(0), rows(0), cols(0), fieldlist(NULL), fieldmap(NULL)
+	{
+	}
+
+	~MsSQLResult()
+	{
+	}
+
+	void AddRow(int colsnum, char **dat, char **colname)
+	{
+		colnames.clear();
+		cols = colsnum;
+		for (int i = 0; i < colsnum; i++)
+		{
+			fieldlists.resize(fieldlists.size()+1);
+			colnames.push_back(colname[i]);
+			SQLfield sf(dat[i] ? dat[i] : "", dat[i] ? false : true);
+			fieldlists[rows].push_back(sf);
+		}
+		rows++;
+	}
+
+	void UpdateAffectedCount()
+	{
+		rows++;
+	}
+
+	virtual int Rows()
+	{
+		return rows;
+	}
+
+	virtual int Cols()
+	{
+		return cols;
+	}
+
+	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];
+		}
+
+		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()
+	{
+		/* In an effort to reduce overhead we don't actually allocate the map
+		 * until the first time it's needed...so...
+		 */
+		if(fieldmap)
+		{
+			fieldmap->clear();
+		}
+		else
+		{
+			fieldmap = new SQLfieldMap;
+		}
+
+		if (currentrow < rows)
+		{
+			for (int i = 0; i < Cols(); i++)
+			{
+				fieldmap->insert(std::make_pair(ColName(i), GetValue(currentrow, i)));
+			}
+			currentrow++;
+		}
+
+		return *fieldmap;
+	}
+
+	virtual SQLfieldList* GetRowPtr()
+	{
+		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 SQLConn : public classbase
+{
+  private:
+	ResultQueue results;
+  	InspIRCd* Instance;
+	Module* mod;
+	SQLhost host;
+	TDSLOGIN* login;
+	TDSSOCKET* sock;
+	TDSCONNECTION* conn;
+
+  public:
+	SQLConn(InspIRCd* SI, Module* m, const SQLhost& hi)
+	: Instance(SI), mod(m), host(hi)
+	{
+		if (OpenDB() == TDS_SUCCEED)
+		{
+			std::string query("USE " + host.name);
+			if (tds_submit_query(sock, query.c_str()) == TDS_SUCCEED)
+			{
+				if (tds_process_simple_query(sock) != TDS_SUCCEED)
+				{
+					Instance->Logs->Log("m_mssql",DEFAULT, "WARNING: Could not select database " + host.name + " for DB with id: " + host.id);
+					CloseDB();
+				}
+			}
+			else
+			{
+				Instance->Logs->Log("m_mssql",DEFAULT, "WARNING: Could not select database " + host.name + " for DB with id: " + host.id);
+				CloseDB();
+			}
+		}
+		else
+		{
+			Instance->Logs->Log("m_mssql",DEFAULT, "WARNING: Could not connect to DB with id: " + host.id);
+			CloseDB();
+		}
+	}
+
+	~SQLConn()
+	{
+		CloseDB();
+	}
+
+	SQLerror Query(SQLrequest &req)
+	{
+		/* 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
+		 */
+		query = new char[req.query.q.length() + (paramlen*2) + 1];
+		queryend = query;
+
+		for(unsigned long i = 0; i < req.query.q.length(); i++)
+		{
+			if(req.query.q[i] == '?')
+			{
+				if(req.query.p.size())
+				{
+					/* Custom escaping for this one. converting ' to '' should make SQL Server happy. Ugly but fast :]
+					 */
+					char* escaped = new char[(req.query.p.front().length() * 2) + 1];
+					char* escend = escaped;
+					for (std::string::iterator p = req.query.p.front().begin(); p < req.query.p.front().end(); p++)
+					{
+						if (*p == '\'')
+						{
+							*escend = *p;
+							escend++;
+							*escend = *p;
+						}
+						*escend = *p;
+						escend++;
+					}
+					*escend = 0;
+					
+					for (char* n = escaped; *n; n++)
+					{
+						*queryend = *n;
+						queryend++;
+					}
+					delete[] escaped;
+					req.query.p.pop_front();
+				}
+				else
+					break;
+			}
+			else
+			{
+				*queryend = req.query.q[i];
+				queryend++;
+			}
+			querylength++;
+		}
+		*queryend = 0;
+		req.query.q = query;
+
+		MsSQLResult* res = new MsSQLResult(mod, req.GetSource(), req.id);
+		res->dbid = host.id;
+		res->query = req.query.q;
+
+		const char* msquery = strdup(req.query.q.data());
+		Instance->Logs->Log("m_mssql",DEBUG,"doing Query: %s",msquery);
+		if (tds_submit_query(sock, msquery) != TDS_SUCCEED)
+		{
+			std::string error("failed to execute: "+std::string(req.query.q.data()));
+			delete[] query;
+			delete res;
+			return SQLerror(QSEND_FAIL, error);
+		}
+		delete[] query;
+		
+		int tds_res;
+		while (tds_process_tokens(sock, &tds_res, NULL, TDS_TOKEN_RESULTS) == TDS_SUCCEED)
+		{
+			Instance->Logs->Log("m_mssql",DEBUG,"<******> result type: %d", tds_res);
+			Instance->Logs->Log("m_mssql",DEBUG,"AFFECTED ROWS: %d", sock->rows_affected);
+			switch (tds_res)
+			{
+				case TDS_ROWFMT_RESULT:
+					break;
+
+				case TDS_DONE_RESULT:
+					if (sock->rows_affected > -1)
+					{
+						for (int c = 0; c < sock->rows_affected; c++)  res->UpdateAffectedCount();
+						continue;
+					}
+					break;
+
+				case TDS_ROW_RESULT:
+					while (tds_process_tokens(sock, &tds_res, NULL, TDS_STOPAT_ROWFMT|TDS_RETURN_DONE|TDS_RETURN_ROW) == TDS_SUCCEED)
+					{
+						if (tds_res != TDS_ROW_RESULT)
+							break;
+
+						if (!sock->current_results)
+							continue;
+
+						if (sock->res_info->row_count > 0)
+						{
+							int cols = sock->res_info->num_cols;
+							char** name = new char*[MAXBUF];
+							char** data = new char*[MAXBUF];
+							for (int j=0; j<cols; j++)
+							{
+								TDSCOLUMN* col = sock->current_results->columns[j];
+								name[j] = col->column_name;
+
+								int ctype;
+								int srclen;
+								unsigned char* src;
+								CONV_RESULT dres;
+								ctype = tds_get_conversion_type(col->column_type, col->column_size);
+								src = &(sock->current_results->current_row[col->column_offset]);
+								srclen = col->column_cur_size;
+								tds_convert(sock->tds_ctx, ctype, (TDS_CHAR *) src, srclen, SYBCHAR, &dres);
+								data[j] = (char*)dres.ib;
+							}
+							ResultReady(res, cols, data, name);
+						}
+					}
+					break;
+
+				default:
+					break;
+			}	
+		}
+		Instance->Logs->Log("m_mssql",DEBUG,"WEEEEEEEEE 4");
+
+		results.push_back(res);
+		SendNotify();
+		return SQLerror();
+	}
+
+	static int HandleMessage(const TDSCONTEXT * pContext, TDSSOCKET * pTdsSocket, TDSMESSAGE * pMessage)
+	{
+		/* TODO: FIXME */
+		//Instance->Logs->Log("m_mssql",DEBUG,pMessage->message);
+		//printf("Message: %s\n", pMessage->message);
+		return 0;
+	}
+
+	static int HandleError(const TDSCONTEXT * pContext, TDSSOCKET * pTdsSocket, TDSMESSAGE * pMessage)
+	{
+		/* TODO: FIXME */
+		//Instance->Logs->Log("m_mssql",DEBUG,pMessage->message);
+		//printf("Error: %s\n", pMessage->message);
+		return 0;
+	}
+
+	void ResultReady(MsSQLResult *res, int cols, char **data, char **colnames)
+	{
+		res->AddRow(cols, data, colnames);
+	}
+
+	void AffectedReady(MsSQLResult *res)
+	{
+		res->UpdateAffectedCount();
+	}
+
+	int OpenDB()
+	{
+		CloseDB();
+
+		TDSCONTEXT* cont;
+		cont = tds_alloc_context(NULL);
+		cont->msg_handler = HandleMessage;
+		cont->err_handler = HandleError;
+
+		login = tds_alloc_login();
+		tds_set_library(login,"TDS-Library");
+		tds_set_host(login, "");
+		tds_set_server(login, host.host.c_str());
+		tds_set_server_addr(login, host.host.c_str());
+		tds_set_user(login, host.user.c_str());
+		tds_set_passwd(login, host.pass.c_str());
+		tds_set_port(login, host.port);
+		tds_set_packet(login, 512);
+
+		sock = tds_alloc_socket(cont, 512);
+		conn = tds_read_config_info(NULL, login, cont->locale);
+		return tds_connect(sock, conn);
+	}
+
+	void CloseDB()
+	{
+		if (login)
+			tds_free_login(login);
+		if (sock)
+			tds_free_socket(sock);
+		if (conn)
+			tds_free_connection(conn);
+	}
+
+	SQLhost GetConfHost()
+	{
+		return host;
+	}
+
+	void SendResults()
+	{
+		while (results.size())
+		{
+			MsSQLResult* res = results[0];
+			if (res->GetDest())
+			{
+				res->Send();
+			}
+			else
+			{
+				/* If the client module is unloaded partway through a query then the provider will set
+				 * the pointer to NULL. We cannot just cancel the query as the result will still come
+				 * through at some point...and it could get messy if we play with invalid pointers...
+				 */
+				delete res;
+			}
+			results.pop_front();
+		}
+	}
+
+	void ClearResults()
+	{
+		while (results.size())
+		{
+			MsSQLResult* res = results[0];
+			delete res;
+			results.pop_front();
+		}
+	}
+
+	void SendNotify()
+	{
+		int QueueFD;
+		if ((QueueFD = socket(AF_FAMILY, SOCK_STREAM, 0)) == -1)
+		{
+			/* crap, we're out of sockets... */
+			return;
+		}
+
+		insp_sockaddr addr;
+
+#ifdef IPV6
+		insp_aton("::1", &addr.sin6_addr);
+		addr.sin6_family = AF_FAMILY;
+		addr.sin6_port = htons(resultnotify->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(resultnotify->GetPort());
+#endif
+
+		if (connect(QueueFD, (sockaddr*)&addr,sizeof(addr)) == -1)
+		{
+			/* wtf, we cant connect to it, but we just created it! */
+			return;
+		}
+	}
+
+};
+
+
+class ModuleMsSQL : public Module
+{
+  private:
+	ConnMap connections;
+	unsigned long currid;
+
+  public:
+	ModuleMsSQL(InspIRCd* Me)
+	: Module::Module(Me), currid(0)
+	{
+		ServerInstance->Modules->UseInterface("SQLutils");
+
+		if (!ServerInstance->Modules->PublishFeature("SQL", this))
+		{
+			throw ModuleException("m_mssql: Unable to publish feature 'SQL'");
+		}
+
+		resultnotify = new ResultNotifier(ServerInstance, this);
+
+		ReadConf();
+
+		ServerInstance->Modules->PublishInterface("SQL", this);
+		Implementation eventlist[] = { I_OnRequest, I_OnRehash };
+		ServerInstance->Modules->Attach(eventlist, this, 2);
+	}
+
+	virtual ~ModuleMsSQL()
+	{
+		ClearQueue();
+		ClearAllConnections();
+		resultnotify->SetFd(-1);
+		resultnotify->state = I_ERROR;
+		resultnotify->OnError(I_ERR_SOCKET);
+		resultnotify->ClosePending = true;
+		delete resultnotify;
+		ServerInstance->Modules->UnpublishInterface("SQL", this);
+		ServerInstance->Modules->UnpublishFeature("SQL");
+		ServerInstance->Modules->DoneWithInterface("SQLutils");
+	}
+
+
+	void SendQueue()
+	{
+		for (ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
+		{
+			iter->second->SendResults();
+		}
+	}
+
+	void ClearQueue()
+	{
+		for (ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
+		{
+			iter->second->ClearResults();
+		}
+	}
+
+	bool HasHost(const SQLhost &host)
+	{
+		for (ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
+		{
+			if (host == iter->second->GetConfHost())
+				return true;
+		}
+		return false;
+	}
+
+	bool HostInConf(const SQLhost &h)
+	{
+		ConfigReader conf(ServerInstance);
+		for(int i = 0; i < conf.Enumerate("database"); i++)
+		{
+			SQLhost host;
+			host.id		= conf.ReadValue("database", "id", i);
+			host.host	= conf.ReadValue("database", "hostname", i);
+			host.port	= conf.ReadInteger("database", "port", "1433", i, true);
+			host.name	= conf.ReadValue("database", "name", i);
+			host.user	= conf.ReadValue("database", "username", i);
+			host.pass	= conf.ReadValue("database", "password", i);
+			host.ssl	= conf.ReadFlag("database", "ssl", "0", i);
+			if (h == host)
+				return true;
+		}
+		return false;
+	}
+    
+	void ReadConf()
+	{
+		ClearOldConnections();
+
+		ConfigReader conf(ServerInstance);
+		for(int i = 0; i < conf.Enumerate("database"); i++)
+		{
+			SQLhost host;
+
+			host.id		= conf.ReadValue("database", "id", i);
+			host.host	= conf.ReadValue("database", "hostname", i);
+			host.port	= conf.ReadInteger("database", "port", "1433", i, true);
+			host.name	= conf.ReadValue("database", "name", i);
+			host.user	= conf.ReadValue("database", "username", i);
+			host.pass	= conf.ReadValue("database", "password", i);
+			host.ssl	= conf.ReadFlag("database", "ssl", "0", i);
+
+			if (HasHost(host))
+				continue;
+
+			this->AddConn(host);
+		}
+	}
+
+	void AddConn(const SQLhost& hi)
+	{
+		if (HasHost(hi))
+		{
+			ServerInstance->Logs->Log("m_mssql",DEFAULT, "WARNING: A MsSQL connection with id: %s already exists. Aborting database open attempt.", hi.id.c_str());
+			return;
+		}
+
+		SQLConn* newconn;
+
+		newconn = new SQLConn(ServerInstance, this, hi);
+
+		connections.insert(std::make_pair(hi.id, newconn));
+	}
+
+	void ClearOldConnections()
+	{
+		ConnMap::iterator iter,safei;
+		for (iter = connections.begin(); iter != connections.end(); iter++)
+		{
+			if (!HostInConf(iter->second->GetConfHost()))
+			{
+				delete iter->second;
+				safei = iter;
+				--iter;
+				connections.erase(safei);
+			}
+		}
+	}
+
+	void ClearAllConnections()
+	{
+		ConnMap::iterator i;
+		while ((i = connections.begin()) != connections.end())
+		{
+			connections.erase(i);
+			delete i->second;
+		}
+	}
+
+	virtual void OnRehash(User* user, const std::string &parameter)
+	{
+		ReadConf();
+	}
+
+	virtual const char* OnRequest(Request* request)
+	{
+		if(strcmp(SQLREQID, request->GetId()) == 0)
+		{
+			SQLrequest* req = (SQLrequest*)request;
+			ConnMap::iterator iter;
+			if((iter = connections.find(req->dbid)) != connections.end())
+			{
+				req->id = NewID();
+				req->error = iter->second->Query(*req);
+				return SQLSUCCESS;
+			}
+			else
+			{
+				req->error.Id(BAD_DBID);
+				return NULL;
+			}
+		}
+		return NULL;
+	}
+
+	unsigned long NewID()
+	{
+		if (currid+1 == 0)
+			currid++;
+
+		return ++currid;
+	}
+
+	virtual Version GetVersion()
+	{
+		return Version(1,0,0,0,VF_VENDOR|VF_SERVICEPROVIDER,API_VERSION);
+	}
+
+};
+
+void ResultNotifier::Dispatch()
+{
+	((ModuleMsSQL*)mod)->SendQueue();
+}
+
+MODULE_INIT(ModuleMsSQL)