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git://xwords.git.sourceforge.net/gitroot/xwords/xwords
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0787a06eb5
(including seed so it's harder to spoof); respond to that by setting a DEAD column in the db and flagging the device as gone. Notify any connected device of the fact. Refuse to accept new connections to that game. As already-connected devices reconnect, allow them to do so but send a new status message that their game is dead. Not heavily tested yet.
542 lines
16 KiB
C++
542 lines
16 KiB
C++
/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
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/*
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* Copyright 2010 by Eric House (xwords@eehouse.org). All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include "dbmgr.h"
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#include "mlock.h"
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#include "xwrelay_priv.h"
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#define DB_NAME "xwgames"
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#define GAMES_TABLE "games"
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#define MSGS_TABLE "msgs"
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#define ARRAYSUM "sum_array(nPerDevice)"
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static DBMgr* s_instance = NULL;
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static int sumArray( const char* const str );
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#define DELIM "\1"
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static void formatParams( char* paramValues[], int nParams, const char* fmt,
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char* buf, int bufLen, ... );
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/* static */ DBMgr*
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DBMgr::Get()
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{
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if ( s_instance == NULL ) {
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s_instance = new DBMgr();
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}
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return s_instance;
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} /* Get */
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DBMgr::DBMgr()
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{
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logf( XW_LOGINFO, "%s called", __func__ );
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/* Now figure out what the largest cid currently is. There must be a way
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to get postgres to do this for me.... */
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/* const char* query = "SELECT cid FROM games ORDER BY cid DESC LIMIT 1"; */
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/* PGresult* result = PQexec( m_pgconn, query ); */
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/* if ( 0 == PQntuples( result ) ) { */
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/* m_nextCID = 1; */
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/* } else { */
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/* char* value = PQgetvalue( result, 0, 0 ); */
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/* m_nextCID = 1 + atoi( value ); */
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/* } */
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/* PQclear(result); */
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/* logf( XW_LOGINFO, "%s: m_nextCID=%d", __func__, m_nextCID ); */
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}
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DBMgr::~DBMgr()
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{
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logf( XW_LOGINFO, "%s called", __func__ );
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assert( s_instance == this );
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s_instance = NULL;
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}
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void
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DBMgr::AddNew( const char* cookie, const char* connName, CookieID cid,
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int langCode, int nPlayersT, bool isPublic )
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{
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if ( !cookie ) cookie = "";
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if ( !connName ) connName = "";
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const char* command = "INSERT INTO " GAMES_TABLE
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" (cid, room, connName, nTotal, nPerDevice, lang, pub)"
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" VALUES( $1, $2, $3, $4, ARRAY[0,0,0,0], $5, $6 )";
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int nParams = 6;
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char* paramValues[nParams];
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char buf[512];
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formatParams( paramValues, nParams,
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"%d"DELIM"%s"DELIM"%s"DELIM"%d"DELIM"%d"DELIM"%s",
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buf, sizeof(buf), cid, cookie, connName, nPlayersT,
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langCode, isPublic?"TRUE":"FALSE" );
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PGresult* result = PQexecParams( getThreadConn(), command,
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nParams, NULL,
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paramValues,
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NULL, NULL, 0 );
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if ( PGRES_COMMAND_OK != PQresultStatus(result) ) {
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logf( XW_LOGERROR, "PQexec=>%s;%s", PQresStatus(PQresultStatus(result)),
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PQresultErrorMessage(result) );
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}
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PQclear( result );
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}
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CookieID
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DBMgr::FindGame( const char* connName, char* cookieBuf, int bufLen,
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int* langP, int* nPlayersTP, int* nPlayersHP, bool* isDead )
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{
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CookieID cid = 0;
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const char* fmt = "SELECT cid, room, lang, nTotal, nPerDevice, dead FROM "
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GAMES_TABLE " WHERE connName = '%s'"
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" LIMIT 1";
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char query[256];
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snprintf( query, sizeof(query), fmt, connName );
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logf( XW_LOGINFO, "query: %s", query );
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PGresult* result = PQexec( getThreadConn(), query );
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if ( 1 == PQntuples( result ) ) {
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cid = atoi( PQgetvalue( result, 0, 0 ) );
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snprintf( cookieBuf, bufLen, "%s", PQgetvalue( result, 0, 1 ) );
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*langP = atoi( PQgetvalue( result, 0, 2 ) );
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*nPlayersTP = atoi( PQgetvalue( result, 0, 3 ) );
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*nPlayersHP = atoi( PQgetvalue( result, 0, 4 ) );
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*isDead = 't' == PQgetvalue( result, 0, 5 )[0];
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}
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PQclear( result );
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logf( XW_LOGINFO, "%s(%s)=>%d", __func__, connName, cid );
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return cid;
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}
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CookieID
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DBMgr::FindOpen( const char* cookie, int lang, int nPlayersT, int nPlayersH,
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bool wantsPublic, char* connNameBuf, int bufLen,
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int* nPlayersHP )
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{
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CookieID cid = 0;
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int nParams = 5;
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char* paramValues[nParams];
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char buf[512];
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formatParams( paramValues, nParams,
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"%s"DELIM"%d"DELIM"%d"DELIM"%d"DELIM"%s", buf, sizeof(buf),
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cookie, lang, nPlayersT, nPlayersH, wantsPublic?"TRUE":"FALSE" );
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/* NOTE: ILIKE, for case-insensitive comparison, is a postgres extension
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to SQL. */
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const char* cmd = "SELECT cid, connName, nPerDevice FROM " GAMES_TABLE
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" WHERE NOT dead"
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" AND room ILIKE $1"
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" AND lang = $2"
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" AND nTotal = $3"
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" AND $4 <= nTotal-sum_array(nPerDevice)"
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" AND $5 = pub"
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" LIMIT 1";
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PGresult* result = PQexecParams( getThreadConn(), cmd,
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nParams, NULL,
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paramValues,
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NULL, NULL, 0 );
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if ( 1 == PQntuples( result ) ) {
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cid = atoi( PQgetvalue( result, 0, 0 ) );
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snprintf( connNameBuf, bufLen, "%s", PQgetvalue( result, 0, 1 ) );
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*nPlayersHP = sumArray( PQgetvalue( result, 0, 2 ) );
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/* cid may be 0, but should use game anyway */
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}
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PQclear( result );
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logf( XW_LOGINFO, "%s=>%d", __func__, cid );
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return cid;
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} /* FindOpen */
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HostID
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DBMgr::AddDevice( const char* connName, HostID curID, int nToAdd,
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unsigned short seed )
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{
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HostID newID = curID;
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if ( newID == HOST_ID_NONE ) {
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int arr[4];
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readArray( connName, arr );
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for ( newID = HOST_ID_SERVER; newID <= 4; ++newID ) {
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if ( arr[newID-1] == 0 ) {
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break;
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}
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}
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}
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assert( newID <= 4 );
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const char* fmt = "UPDATE " GAMES_TABLE " SET nPerDevice[%d] = %d,"
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" seeds[%d] = %d, mtime='now'"
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" WHERE connName = '%s'";
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char query[256];
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snprintf( query, sizeof(query), fmt, newID, nToAdd, newID, seed, connName );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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execSql( query );
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return newID;
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}
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bool
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DBMgr::RmDevice( const char* connName, HostID hid )
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{
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const char* fmt = "UPDATE " GAMES_TABLE " SET nPerDevice[%d] = 0, "
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"seeds[%d] = 0, mtime='now' WHERE connName = '%s'";
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char query[256];
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snprintf( query, sizeof(query), fmt, hid, hid, connName );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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return execSql( query );
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}
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bool
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DBMgr::HaveDevice( const char* connName, HostID hid, int seed )
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{
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bool found = false;
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const char* fmt = "SELECT * from " GAMES_TABLE
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" WHERE connName = '%s' AND seeds[%d] = %d";
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char query[256];
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snprintf( query, sizeof(query), fmt, connName, hid, seed );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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PGresult* result = PQexec( getThreadConn(), query );
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found = 1 == PQntuples( result );
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PQclear( result );
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return found;
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}
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void
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DBMgr::AddCID( const char* const connName, CookieID cid )
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{
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const char* fmt = "UPDATE " GAMES_TABLE " SET cid = %d, "
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" mtime='now' WHERE connName = '%s'";
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char query[256];
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snprintf( query, sizeof(query), fmt, cid, connName );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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execSql( query );
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}
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void
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DBMgr::ClearCID( const char* connName )
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{
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const char* fmt = "UPDATE " GAMES_TABLE " SET cid = null "
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"WHERE connName = '%s'";
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char query[256];
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snprintf( query, sizeof(query), fmt, connName );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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execSql( query );
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}
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void
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DBMgr::RecordSent( const char* const connName, int nBytes )
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{
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const char* fmt = "UPDATE " GAMES_TABLE " SET"
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" nsent = nsent + %d, mtime = 'now'"
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" WHERE connName = '%s'";
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char query[256];
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snprintf( query, sizeof(query), fmt, nBytes, connName );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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execSql( query );
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}
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void
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DBMgr::GetPlayerCounts( const char* const connName, int* nTotal, int* nHere )
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{
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const char* fmt = "SELECT ntotal, sum_array(nperdevice) FROM " GAMES_TABLE
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" WHERE connName = '%s'";
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char query[256];
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snprintf( query, sizeof(query), fmt, connName );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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PGresult* result = PQexec( getThreadConn(), query );
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assert( 1 == PQntuples( result ) );
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*nTotal = atoi( PQgetvalue( result, 0, 0 ) );
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*nHere = atoi( PQgetvalue( result, 0, 1 ) );
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PQclear( result );
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}
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void
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DBMgr::KillGame( const char* const connName, int hid )
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{
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const char* fmt = "UPDATE " GAMES_TABLE " SET dead = TRUE,"
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" nperdevice[%d] = -1"
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" WHERE connName = '%s'";
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char query[256];
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snprintf( query, sizeof(query), fmt, hid, connName );
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execSql( query );
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}
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void
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DBMgr::ClearCIDs( void )
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{
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execSql( "UPDATE " GAMES_TABLE " set cid = null" );
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}
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void
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DBMgr::PublicRooms( int lang, int nPlayers, int* nNames, string& names )
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{
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const char* fmt = "SELECT room, nTotal-sum_array(nPerDevice),"
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" round( extract( epoch from age('now', ctime)))"
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" FROM " GAMES_TABLE
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" WHERE pub = TRUE"
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" AND lang = %d"
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" AND nTotal>sum_array(nPerDevice)"
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" AND nTotal = %d";
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char query[256];
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snprintf( query, sizeof(query), fmt, lang, nPlayers );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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PGresult* result = PQexec( getThreadConn(), query );
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int nTuples = PQntuples( result );
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for ( int ii = 0; ii < nTuples; ++ii ) {
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names.append( PQgetvalue( result, ii, 0 ) );
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names.append( "/" );
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names.append( PQgetvalue( result, ii, 1 ) );
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names.append( "/" );
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names.append( PQgetvalue( result, ii, 2 ) );
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names.append( "\n" );
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}
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PQclear( result );
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*nNames = nTuples;
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}
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int
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DBMgr::PendingMsgCount( const char* connName, int hid )
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{
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int count = 0;
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const char* fmt = "SELECT COUNT(*) FROM " MSGS_TABLE
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" WHERE connName = '%s' AND hid = %d";
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char query[256];
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snprintf( query, sizeof(query), fmt, connName, hid );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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PGresult* result = PQexec( getThreadConn(), query );
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if ( 1 == PQntuples( result ) ) {
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count = atoi( PQgetvalue( result, 0, 0 ) );
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}
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PQclear( result );
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return count;
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}
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bool
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DBMgr::execSql( const char* query )
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{
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PGresult* result = PQexec( getThreadConn(), query );
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bool ok = PGRES_COMMAND_OK == PQresultStatus(result);
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if ( !ok ) {
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logf( XW_LOGERROR, "PQexec=>%s;%s", PQresStatus(PQresultStatus(result)), PQresultErrorMessage(result) );
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}
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PQclear( result );
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return ok;
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}
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void
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DBMgr::readArray( const char* const connName, int arr[] ) /* len 4 */
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{
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const char* fmt = "SELECT nPerDevice FROM " GAMES_TABLE " WHERE connName='%s'";
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char query[256];
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snprintf( query, sizeof(query), fmt, connName );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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PGresult* result = PQexec( getThreadConn(), query );
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assert( 1 == PQntuples( result ) );
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const char* arrStr = PQgetvalue( result, 0, 0 );
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sscanf( arrStr, "{%d,%d,%d,%d}", &arr[0], &arr[1], &arr[2], &arr[3] );
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PQclear( result );
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}
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static int
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sumArray( const char* const arrStr )
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{
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int arr[4];
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sscanf( arrStr, "{%d,%d,%d,%d}", &arr[0], &arr[1], &arr[2], &arr[3] );
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int sum = 0;
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int ii;
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for ( ii = 0; ii < 4; ++ii ) {
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sum += arr[ii];
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}
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return sum;
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}
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/*
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id | connname | hid | msg
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----+-----------+-----+---------
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1 | abcd:1234 | 2 | xyzzx
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2 | abcd:1234 | 2 | xyzzxxx
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3 | abcd:1234 | 3 | xyzzxxx
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*/
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int
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DBMgr::CountStoredMessages( const char* const connName, int hid )
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{
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const char* fmt = "SELECT count(*) FROM " MSGS_TABLE
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" WHERE connname = '%s' ";
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char query[256];
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int len = snprintf( query, sizeof(query), fmt, connName );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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if ( hid != -1 ) {
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snprintf( &query[len], sizeof(query)-len, "AND hid = %d",
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hid );
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}
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PGresult* result = PQexec( getThreadConn(), query );
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assert( 1 == PQntuples( result ) );
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int count = atoi( PQgetvalue( result, 0, 0 ) );
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PQclear( result );
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return count;
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}
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int
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DBMgr::CountStoredMessages( const char* const connName )
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{
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return CountStoredMessages( connName, -1 );
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} /* CountStoredMessages */
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void
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DBMgr::StoreMessage( const char* const connName, int hid,
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const unsigned char* buf, int len )
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{
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size_t newLen;
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const char* fmt = "INSERT INTO " MSGS_TABLE " (connname, hid, msg)"
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" VALUES( '%s', %d, E'%s')";
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unsigned char* bytes = PQescapeByteaConn( getThreadConn(), buf, len, &newLen );
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assert( NULL != bytes );
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char query[newLen+128];
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unsigned int siz = snprintf( query, sizeof(query), fmt, connName, hid, bytes );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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PQfreemem( bytes );
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assert( siz < sizeof(query) );
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execSql( query );
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}
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bool
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DBMgr::GetStoredMessage( const char* const connName, int hid,
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unsigned char* buf, size_t* buflen, int* msgID )
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{
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const char* fmt = "SELECT id, msg FROM " MSGS_TABLE
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" WHERE connName = '%s' AND hid = %d ORDER BY id LIMIT 1";
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char query[256];
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snprintf( query, sizeof(query), fmt, connName, hid );
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logf( XW_LOGINFO, "%s: query: %s", __func__, query );
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PGresult* result = PQexec( getThreadConn(), query );
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int nTuples = PQntuples( result );
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assert( nTuples <= 1 );
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bool found = nTuples == 1;
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if ( found ) {
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*msgID = atoi( PQgetvalue( result, 0, 0 ) );
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/* int len = PQgetlength( result, 0, 1 ); */
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const unsigned char* from =
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(const unsigned char* )PQgetvalue( result, 0, 1 );
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size_t to_length;
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unsigned char* bytes = PQunescapeBytea( from, &to_length );
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assert( to_length <= *buflen );
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memcpy( buf, bytes, to_length );
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PQfreemem( bytes );
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*buflen = to_length;
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}
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PQclear( result );
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return found;
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}
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void
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DBMgr::RemoveStoredMessage( int msgID )
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{
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const char* fmt = "DELETE from " MSGS_TABLE " WHERE id = %d";
|
|
char query[256];
|
|
snprintf( query, sizeof(query), fmt, msgID );
|
|
logf( XW_LOGINFO, "%s: query: %s", __func__, query );
|
|
|
|
execSql( query );
|
|
}
|
|
|
|
static void
|
|
formatParams( char* paramValues[], int nParams, const char* fmt, char* buf,
|
|
int bufLen, ... )
|
|
{
|
|
va_list ap;
|
|
va_start( ap, bufLen );
|
|
|
|
int len = vsnprintf( buf, bufLen, fmt, ap );
|
|
|
|
int ii, pnum;
|
|
for ( pnum = 0, ii = 0; ii < len && pnum < nParams; ++pnum ) {
|
|
paramValues[pnum] = &buf[ii];
|
|
for ( ; ii < len; ++ii ) {
|
|
if ( buf[ii] == DELIM[0] ) {
|
|
buf[ii] = '\0';
|
|
++ii;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
va_end(ap);
|
|
}
|
|
|
|
static void
|
|
destr_function( void* conn )
|
|
{
|
|
logf( XW_LOGINFO, "%s()", __func__ );
|
|
PGconn* pgconn = (PGconn*)conn;
|
|
PQfinish( pgconn );
|
|
}
|
|
|
|
static pthread_key_t s_conn_key;
|
|
|
|
static void conn_key_alloc()
|
|
{
|
|
logf( XW_LOGINFO, "%s()", __func__ );
|
|
pthread_key_create( &s_conn_key, destr_function );
|
|
}
|
|
|
|
PGconn*
|
|
DBMgr::getThreadConn( void )
|
|
{
|
|
PGconn* conn = NULL;
|
|
|
|
static pthread_once_t key_once = PTHREAD_ONCE_INIT;
|
|
pthread_once( &key_once, conn_key_alloc );
|
|
conn = (PGconn*)pthread_getspecific( s_conn_key );
|
|
|
|
if ( NULL == conn ) {
|
|
conn = PQconnectdb( "dbname = " DB_NAME );
|
|
pthread_setspecific( s_conn_key, conn );
|
|
}
|
|
return conn;
|
|
}
|