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xwords/xwords4/relay/cref.h

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/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
/*
* Copyright 2005-2012 by Eric House (xwords@eehouse.org). All rights
* reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _CREF_H_
#define _CREF_H_
#include <map>
#include <set>
#include <vector>
#include <string>
#include <deque>
#include <pthread.h>
#include "xwrelay_priv.h"
#include "xwrelay.h"
#include "devid.h"
#include "dbmgr.h"
#include "states.h"
#include "addrinfo.h"
typedef vector<uint8_t> MsgBuffer;
typedef deque<MsgBuffer*> MsgBufQueue;
using namespace std;
class CookieMapIterator; /* forward */
struct HostRec {
public:
HostRec(HostID hostID, const AddrInfo* addr, int nPlayersH, int seed,
bool ackPending )
: m_seed(seed)
{
update( addr, nPlayersH, seed, ackPending );
logf( XW_LOGINFO, "%s created HostRec with id %d", __func__, hostID);
}
void update( const AddrInfo* addr, int nPlayersH, int seed, bool ackPending )
{
assert( seed == m_seed );
m_addr = *addr;
m_nPlayersH = nPlayersH;
m_seed = seed;
m_lastHeartbeat = uptime();
m_ackPending = ackPending;
}
AddrInfo m_addr;
int m_nPlayersH;
int m_seed;
time_t m_lastHeartbeat;
bool m_ackPending;
};
struct AckTimer {
public:
HostID m_hid;
class CookieRef* m_this;
};
class CookieRef {
public:
vector<AddrInfo> GetAddrs( void );
static const int MAX_DEVICES = 4;
private:
/* These classes have access to CookieRef. All others should go through
SafeCref instances. */
friend class CRefMgr;
friend class SafeCref;
friend class CookieMapIterator;
CookieRef( const char* cookie, const char* connName, CookieID cid,
int langCode, int nPlayersT, int nPlayersH );
void ReInit( const char* cookie, const char* connName, CookieID cid,
int langCode, int nPlayers, int nAlreadyHere );
~CookieRef();
void Clear(void); /* make clear it's unused */
bool Lock( void );
void Unlock( void );
/* Within this cookie, remember that this hostID and socket go together.
If the hostID is HOST_ID_SERVER, it's the server. */
CookieID GetCid() { return m_cid; }
int GetPlayersSought() { return m_nPlayersSought; }
int GetPlayersHere() { return m_nPlayersHere; }
bool HaveRoom( int nPlayers );
int CountSockets();
int CountSockets_locked(); /* needed? */
bool HasSocket( const AddrInfo* addr );
bool HasSocket_locked( const AddrInfo* addr );
const char* Cookie() const { return m_cookie.c_str(); }
const char* ConnName() { return m_connName.c_str(); }
int GetHeartbeat() { return m_heartbeat; }
const AddrInfo* SocketForHost( HostID dest );
HostID HostForSocket( const AddrInfo* addr );
/* connect case */
bool AlreadyHere( unsigned short seed, const AddrInfo* addr, HostID* prevHostID );
/* reconnect case */
bool AlreadyHere( HostID hid, unsigned short seed, const AddrInfo* addr, bool* spotTaken );
/* for console */
void _PrintCookieInfo( string& out );
void PrintSocketInfo( string& out, int socket );
void _FormatHostInfo( string* hostIds, string* seeds, string* addrs );
static CookieMapIterator GetCookieIterator();
/* Nuke an existing */
static void Delete( CookieID cid );
static void Delete( const char* name );
bool _Connect( int clientVersion, DevID* devID,
int nPlayersH, int nPlayersS, int seed, HostID srcID,
bool seenSeed, const AddrInfo* addr );
bool _Reconnect( int clientVersion, DevID* devID,
HostID srcID, int nPlayersH, int nPlayersS,
int seed, const AddrInfo* addr, bool gameDead );
void _HandleAck( HostID hostID );
void _PutMsg( HostID srcID, const AddrInfo* addr, HostID destID,
const uint8_t* buf, int buflen );
void _Disconnect( const AddrInfo* addr, HostID hostID );
void _DeviceGone( HostID hostID, int seed );
void _Shutdown();
void _HandleHeartbeat( HostID id, const AddrInfo* addr );
void _CheckHeartbeats( time_t now );
void _Forward( HostID src, const AddrInfo* addr, HostID dest,
const uint8_t* buf, int buflen );
void _Remove( const AddrInfo* addr );
void _CheckAllConnected();
void _CheckNotAcked( HostID hid );
bool ShouldDie() { return m_curState == XWS_EMPTY; }
XW_RELAY_STATE CurState() { return m_curState; }
void logf( XW_LogLevel level, const char* format, ... );
class CRefEvent {
public:
CRefEvent() { type = XWE_NONE; }
CRefEvent( XW_RELAY_EVENT typ ) { type = typ; }
CRefEvent( XW_RELAY_EVENT typ, const AddrInfo* addrp ) { type = typ; addr = *addrp; }
XW_RELAY_EVENT type;
AddrInfo addr; /* sender's address */
union {
struct {
HostID src;
HostID dest;
const uint8_t* buf;
int buflen;
} fwd;
struct {
int clientVersion;
DevID* devID;
int nPlayersH;
int nPlayersS;
int seed;
HostID srcID;
} con;
struct {
HostID srcID;
} ack;
struct {
HostID srcID;
} discon;
struct {
HostID hid;
int seed;
} devgone;
struct {
HostID id;
} heart;
struct {
time_t now;
} htime;
struct {
} rmsock;
struct {
XWREASON why;
} disnote;
} u;
};
bool send_with_length( const AddrInfo* addr, HostID hid,
const uint8_t* buf, int bufLen, bool cascade ) {
return send_with_length( addr, hid, buf, bufLen, cascade, NULL );
}
bool send_with_length( const AddrInfo* addr, HostID hid,
const uint8_t* buf, int bufLen, bool cascade,
uint32_t* packetIDP );
void send_msg( const AddrInfo* addr, HostID id,
XWRelayMsg msg, XWREASON why, bool cascade );
void pushConnectEvent( int clientVersion, DevID* devID,
int nPlayersH, int nPlayersS,
int seed, HostID srcID, const AddrInfo* addr );
void pushReconnectEvent( int clientVersion, DevID* devID,
HostID srcID, int nPlayersH, int nPlayersS,
int seed, const AddrInfo* addr );
void pushHeartbeatEvent( HostID id, const AddrInfo* addr );
void pushHeartFailedEvent( const AddrInfo* addr );
void pushForwardEvent( HostID src, const AddrInfo* addr,
HostID dest, const uint8_t* buf, int buflen );
void pushDestBadEvent();
void pushLastSocketGoneEvent();
void pushGameDead( const AddrInfo* addr );
void checkHaveRoom( const CRefEvent* evt );
void pushRemoveSocketEvent( const AddrInfo* addr );
void pushNotifyDisconEvent( const AddrInfo* addr, XWREASON why );
void handleEvents();
void sendResponse( const CRefEvent* evt, bool initial,
const DevIDRelay* devID );
void sendAnyStored( const CRefEvent* evt );
void initPlayerCounts( const CRefEvent* evt );
void increasePlayerCounts( CRefEvent* evt, bool reconn, HostID* hidp,
DevIDRelay* devID );
void updateAck( HostID hostID, bool keep );
void dropPending( int seed );
void postCheckAllHere();
void postDropDevice( HostID hostID );
void postTellHaveMsgs( const AddrInfo* addr );
void setAllConnectedTimer();
void cancelAllConnectedTimer();
void setAckTimer( HostID hid );
void cancelAckTimer( HostID hid );
static void storeNoAck( bool acked, uint32_t packetID, void* data );
void forward_or_store( const CRefEvent* evt );
void send_denied( const CRefEvent* evt, XWREASON why );
void send_trytell( const CRefEvent* evt );
void checkFromServer( const CRefEvent* evt );
void notifyOthers( const AddrInfo* addr, XWRelayMsg msg, XWREASON why );
void notifyGameDead( const AddrInfo* addr );
void disconnectSockets( XWREASON why );
void disconnectSocket( const AddrInfo* addr, XWREASON why );
void removeDevice( const CRefEvent* const evt );
void noteHeartbeat(const CRefEvent* evt);
void notifyDisconn(const CRefEvent* evt);
void removeSocket( const AddrInfo* addr );
void sendAllHere( bool initial );
void assignConnName( void );
time_t GetStarttime( void ) { return m_starttime; }
int GetLangCode( void ) { return m_langCode; }
bool notInUse(void) { return m_cid == 0; }
void store_message( HostID dest, const uint8_t* buf,
unsigned int len );
void send_stored_messages( HostID dest, const AddrInfo* addr );
void printSeeds( const char* caller );
/* timer callback */
static void s_checkAllConnected( void* closure );
static void s_checkAck( void* closure );
/* Track sockets (= current connections with games on devices) in this
game. There will never be more than four of these */
pthread_rwlock_t m_socketsRWLock;
HostRec* m_sockets[MAX_DEVICES];
int m_heartbeat; /* might change per carrier or something. */
string m_cookie; /* cookie used for initial connections */
string m_connName; /* globally unique name */
CookieID m_cid; /* Unique among current games on this server */
XW_RELAY_STATE m_curState;
deque<CRefEvent> m_eventQueue;
int m_nPlayersSought;
int m_nPlayersHere;
int m_langCode;
time_t m_starttime;
AckTimer m_timers[4];
pthread_t m_locking_thread;
bool m_in_handleEvents; /* for debugging only */
int m_delayMicros;
}; /* CookieRef */
#endif
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