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snes9x/server.cpp

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/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
#ifdef NETPLAY_SUPPORT
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <memory.h>
#include <sys/types.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include "snes9x.h"
#ifdef __WIN32__
#include <winsock.h>
#include <process.h>
#include "win32/wsnes9x.h"
#define ioctl ioctlsocket
#define close closesocket
#define read(a,b,c) recv(a, b, c, 0)
#define write(a,b,c) send(a, b, c, 0)
#define gettimeofday(a,b) S9xGetTimeOfDay (a)
#define exit(a) _endthread()
void S9xGetTimeOfDay (struct timeval *n);
#else
#include <unistd.h>
#include <sys/time.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <signal.h>
#ifdef __SVR4
#include <sys/stropts.h>
#endif
#endif // !__WIN32__
#include "memmap.h"
#include "snapshot.h"
#include "netplay.h"
#ifdef __WIN32__
#define NP_ONE_CLIENT 1
#else
#define NP_ONE_CLIENT 0
#endif
struct SNPServer NPServer;
extern unsigned long START;
void S9xNPSendToAllClients (uint8 *data, int len);
bool8 S9xNPLoadFreezeFile (const char *fname, uint8 *&data, uint32 &len);
void S9xNPSendFreezeFile (int c, uint8 *data, uint32 len);
void S9xNPNoClientReady (int start_index = NP_ONE_CLIENT);
void S9xNPRecomputePause ();
void S9xNPWaitForEmulationToComplete ();
void S9xNPSendROMImageToAllClients ();
bool8 S9xNPSendROMImageToClient (int client);
void S9xNPSendSRAMToClient (int c);
void S9xNPSendSRAMToAllClients ();
void S9xNPSyncClient (int);
void S9xNPSendROMLoadRequest (const char *filename);
void S9xNPSendFreezeFileToAllClients (const char *filename);
void S9xNPStopServer ();
void S9xNPShutdownClient (int c, bool8 report_error = FALSE)
{
if (NPServer.Clients [c].Connected)
{
NPServer.Clients [c].Connected = FALSE;
NPServer.Clients [c].SaidHello = FALSE;
close (NPServer.Clients [c].Socket);
#ifdef NP_DEBUG
printf ("SERVER: Player %d disconnecting @%ld\n", c + 1, S9xGetMilliTime () - START);
#endif
if (report_error)
{
sprintf (NetPlay.ErrorMsg,
"Player %d on '%s' has disconnected.", c + 1,
NPServer.Clients [c].HostName);
S9xNPSetWarning (NetPlay.ErrorMsg);
}
if (NPServer.Clients [c].HostName)
{
free ((char *) NPServer.Clients [c].HostName);
NPServer.Clients [c].HostName = NULL;
}
if (NPServer.Clients [c].ROMName)
{
free ((char *) NPServer.Clients [c].ROMName);
NPServer.Clients [c].ROMName = NULL;
}
if (NPServer.Clients [c].Who)
{
free ((char *) NPServer.Clients [c].Who);
NPServer.Clients [c].Who = NULL;
}
NPServer.Joypads [c] = 0;
NPServer.NumClients--;
S9xNPRecomputePause ();
}
}
static bool8 S9xNPSGetData (int socket, uint8 *data, int length)
{
int len = length;
uint8 *ptr = data;
do
{
int num_bytes = len;
// Read the data in small chunks, allowing this thread to spot an
// abort request from another thread.
if (num_bytes > 512)
num_bytes = 512;
int got = read (socket, (char *) ptr, num_bytes);
if (got < 0)
{
if (errno == EINTR
#ifdef EAGAIN
|| errno == EAGAIN
#endif
#ifdef EWOULDBLOCK
|| errno == EWOULDBLOCK
#endif
#ifdef WSAEWOULDBLOCK
|| errno == WSAEWOULDBLOCK
#endif
)
continue;
#ifdef WSAEMSGSIZE
if (errno != WSAEMSGSIZE)
return (FALSE);
else
{
got = num_bytes;
#ifdef NP_DEBUG
printf ("SERVER: WSAEMSGSIZE, actual bytes %d while receiving data @%d\n", got, S9xGetMilliTime () - START);
#endif
}
#else
return (FALSE);
#endif
}
else
if (got == 0)
return (FALSE);
len -= got;
ptr += got;
} while (len > 0);
return (TRUE);
}
static bool8 S9xNPSSendData (int fd, const uint8 *data, int length)
{
int len = length;
int chunk = length / 50;
if (chunk < 1024)
chunk = 1024;
do
{
int num_bytes = len;
// Write the data in small chunks, allowing this thread to spot an
// abort request from another thread.
if (num_bytes > chunk)
num_bytes = chunk;
int sent;
sent = write (fd, (char *) data, len);
if (sent < 0)
{
if (errno == EINTR
#ifdef EAGAIN
|| errno == EAGAIN
#endif
#ifdef EWOULDBLOCK
|| errno == EWOULDBLOCK
#endif
)
{
#ifdef NP_DEBUG
printf ("SERVER: EINTR, EAGAIN or EWOULDBLOCK while sending data @%ld\n", S9xGetMilliTime () - START);
#endif
continue;
}
return (FALSE);
}
else
if (sent == 0)
return (FALSE);
len -= sent;
data += sent;
if (length > 1024)
{
#ifdef __WIN32__
int Percent = (uint8) (((length - len) * 100) / length);
PostMessage (GUI.hWnd, WM_USER, Percent, Percent);
Sleep (0);
#endif
}
} while (len > 0);
return (TRUE);
}
void S9xNPSendHeartBeat ()
{
int len = 3;
uint8 data [3 + 4 * 5];
uint8 *ptr = data;
int n;
for (n = NP_MAX_CLIENTS - 1; n >= 0; n--)
{
if (NPServer.Clients [n].SaidHello)
break;
}
if (n >= 0)
{
bool8 Paused = NPServer.Paused != 0;
NPServer.FrameCount++;
*ptr++ = NP_SERV_MAGIC;
*ptr++ = 0; // Individual client sequence number will get placed here
*ptr++ = NP_SERV_JOYPAD | (n << 6) | ((Paused != 0) << 5);
WRITE_LONG (ptr, NPServer.FrameCount);
len += 4;
ptr += 4;
int i;
for (i = 0; i <= n; i++)
{
WRITE_LONG (ptr, NPServer.Joypads [i]);
len += 4;
ptr += 4;
}
S9xNPSendToAllClients (data, len);
}
}
void S9xNPSendToAllClients (uint8 *data, int len)
{
int i;
for (i = 0; i < NP_MAX_CLIENTS; i++)
{
if (NPServer.Clients [i].SaidHello)
{
data [1] = NPServer.Clients [i].SendSequenceNum++;
if (!S9xNPSSendData (NPServer.Clients [i].Socket, data, len))
S9xNPShutdownClient (i, TRUE);
}
}
}
void S9xNPProcessClient (int c)
{
uint8 header [7];
uint8 *data;
uint32 len;
uint8 *ptr;
if (!S9xNPSGetData (NPServer.Clients [c].Socket, header, 7))
{
S9xNPSetWarning ("SERVER: Failed to get message header from client.\n");
S9xNPShutdownClient (c, TRUE);
return;
}
if (header [0] != NP_CLNT_MAGIC)
{
S9xNPSetWarning ("SERVER: Bad header magic value received from client.\n");
S9xNPShutdownClient (c, TRUE);
return;
}
if (header [1] != NPServer.Clients [c].ReceiveSequenceNum)
{
#ifdef NP_DEBUG
printf ("SERVER: Messages lost from '%s', expected %d, got %d\n",
NPServer.Clients [c].HostName ?
NPServer.Clients [c].HostName : "Unknown",
NPServer.Clients [c].ReceiveSequenceNum,
header [1]);
#endif
sprintf (NetPlay.WarningMsg,
"SERVER: Messages lost from '%s', expected %d, got %d\n",
NPServer.Clients [c].HostName ?
NPServer.Clients [c].HostName : "Unknown",
NPServer.Clients [c].ReceiveSequenceNum,
header [1]);
NPServer.Clients [c].ReceiveSequenceNum = header [1] + 1;
S9xNPSetWarning (NetPlay.WarningMsg);
}
else
NPServer.Clients [c].ReceiveSequenceNum++;
len = READ_LONG (&header [3]);
switch (header [2] & 0x3f)
{
case NP_CLNT_HELLO:
#ifdef NP_DEBUG
printf ("SERVER: Got HELLO from client @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Got HELLO from client...", TRUE);
if (len > 0x10000)
{
S9xNPSetWarning ("SERVER: Client HELLO message length error.");
S9xNPShutdownClient (c, TRUE);
return;
}
data = new uint8 [len - 7];
if (!S9xNPSGetData (NPServer.Clients [c].Socket, data, len - 7))
{
S9xNPSetWarning ("SERVER: Failed to get HELLO message content from client.");
S9xNPShutdownClient (c, TRUE);
return;
}
if (NPServer.NumClients <= NP_ONE_CLIENT)
{
NPServer.FrameTime = READ_LONG (data);
strncpy (NPServer.ROMName, (char *) &data [4], 29);
NPServer.ROMName [29] = 0;
}
NPServer.Clients [c].ROMName = strdup ((char *) &data [4]);
#ifdef NP_DEBUG
printf ("SERVER: Client is playing: %s, Frame Time: %d @%ld\n", data + 4, READ_LONG (data), S9xGetMilliTime () - START);
#endif
NPServer.Clients [c].SendSequenceNum = 0;
len = 7 + 1 + 1 + 4 + strlen (NPServer.ROMName) + 1;
delete[] data;
ptr = data = new uint8 [len];
*ptr++ = NP_SERV_MAGIC;
*ptr++ = NPServer.Clients [c].SendSequenceNum++;
if (NPServer.SendROMImageOnConnect &&
NPServer.NumClients > NP_ONE_CLIENT)
*ptr++ = NP_SERV_HELLO | 0x80;
else
*ptr++ = NP_SERV_HELLO;
WRITE_LONG (ptr, len);
ptr += 4;
*ptr++ = NP_VERSION;
*ptr++ = c + 1;
WRITE_LONG (ptr, NPServer.FrameCount);
ptr += 4;
strcpy ((char *) ptr, NPServer.ROMName);
#ifdef NP_DEBUG
printf ("SERVER: Sending welcome information to client @%ld...\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("SERVER: Sending welcome information to new client...", TRUE);
if (!S9xNPSSendData (NPServer.Clients [c].Socket, data, len))
{
S9xNPSetWarning ("SERVER: Failed to send welcome message to client.");
S9xNPShutdownClient (c, TRUE);
return;
}
delete[] data;
#ifdef NP_DEBUG
printf ("SERVER: Waiting for a response from the client @%ld...\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("SERVER: Waiting for a response from the client...", TRUE);
break;
case NP_CLNT_LOADED_ROM:
#ifdef NP_DEBUG
printf ("SERVER: Client %d loaded requested ROM @%ld...\n", c, S9xGetMilliTime () - START);
#endif
NPServer.Clients [c].SaidHello = TRUE;
NPServer.Clients [c].Ready = FALSE;
NPServer.Clients [c].Paused = FALSE;
S9xNPRecomputePause ();
S9xNPWaitForEmulationToComplete ();
if (NPServer.SyncByReset)
{
S9xNPServerAddTask (NP_SERVER_SEND_SRAM, (void *) (pint) c);
S9xNPServerAddTask (NP_SERVER_RESET_ALL, 0);
}
else
S9xNPServerAddTask (NP_SERVER_SYNC_CLIENT, (void *) (pint) c);
break;
case NP_CLNT_RECEIVED_ROM_IMAGE:
#ifdef NP_DEBUG
printf ("SERVER: Client %d received ROM image @%ld...\n", c, S9xGetMilliTime () - START);
#endif
NPServer.Clients [c].SaidHello = TRUE;
NPServer.Clients [c].Ready = FALSE;
NPServer.Clients [c].Paused = FALSE;
S9xNPRecomputePause ();
S9xNPWaitForEmulationToComplete ();
if (NPServer.SyncByReset)
{
S9xNPServerAddTask (NP_SERVER_SEND_SRAM, (void *) (pint) c);
S9xNPServerAddTask (NP_SERVER_RESET_ALL, 0);
}
else
S9xNPServerAddTask (NP_SERVER_SYNC_CLIENT, (void *) (pint) c);
break;
case NP_CLNT_WAITING_FOR_ROM_IMAGE:
#ifdef NP_DEBUG
printf ("SERVER: Client %d waiting for ROM image @%ld...\n", c, S9xGetMilliTime () - START);
#endif
NPServer.Clients [c].SaidHello = TRUE;
NPServer.Clients [c].Ready = FALSE;
NPServer.Clients [c].Paused = FALSE;
S9xNPRecomputePause ();
S9xNPSendROMImageToClient (c);
break;
case NP_CLNT_READY:
#ifdef NP_DEBUG
printf ("SERVER: Client %d ready @%ld...\n", c, S9xGetMilliTime () - START);
#endif
if (NPServer.Clients [c].SaidHello)
{
NPServer.Clients [c].Paused = FALSE;
NPServer.Clients [c].Ready = TRUE;
S9xNPRecomputePause ();
break;
}
NPServer.Clients [c].SaidHello = TRUE;
NPServer.Clients [c].Ready = TRUE;
NPServer.Clients [c].Paused = FALSE;
S9xNPRecomputePause ();
//printf ("SERVER: SaidHello = TRUE, SeqNum = %d @%d\n", NPServer.Clients [c].SendSequenceNum, S9xGetMilliTime () - START);
if (NPServer.NumClients > NP_ONE_CLIENT)
{
if (!NPServer.SendROMImageOnConnect)
{
S9xNPWaitForEmulationToComplete ();
if (NPServer.SyncByReset)
{
S9xNPServerAddTask (NP_SERVER_SEND_SRAM, (void *) (pint) c);
S9xNPServerAddTask (NP_SERVER_RESET_ALL, 0);
}
else
#ifdef __WIN32__
S9xNPServerAddTask (NP_SERVER_SYNC_CLIENT, (void *)(UINT_PTR) c);
#else
/* We need to resync all clients on new player connect as we don't have a 'reference game' */
S9xNPServerAddTask (NP_SERVER_SYNC_ALL, (void *) (pint) c);
#endif
}
}
else
{
NPServer.Clients [c].Ready = TRUE;
S9xNPRecomputePause ();
}
break;
case NP_CLNT_JOYPAD:
NPServer.Joypads [c] = len;
break;
case NP_CLNT_PAUSE:
#ifdef NP_DEBUG
printf ("SERVER: Client %d Paused: %s @%ld\n", c, (header [2] & 0x80) ? "YES" : "NO", S9xGetMilliTime () - START);
#endif
NPServer.Clients [c].Paused = (header [2] & 0x80) != 0;
if (NPServer.Clients [c].Paused)
sprintf (NetPlay.WarningMsg, "SERVER: Client %d has paused.", c + 1);
else
sprintf (NetPlay.WarningMsg, "SERVER: Client %d has resumed.", c + 1);
S9xNPSetWarning (NetPlay.WarningMsg);
S9xNPRecomputePause ();
break;
}
}
void S9xNPAcceptClient (int Listen, bool8 block)
{
struct sockaddr_in remote_address;
struct linger val2;
struct hostent *host;
int new_fd;
int i;
#ifdef NP_DEBUG
printf ("SERVER: attempting to accept new client connection @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("SERVER: Attempting to accept client connection...", TRUE);
memset (&remote_address, 0, sizeof (remote_address));
socklen_t len = sizeof (remote_address);
new_fd = accept (Listen, (struct sockaddr *)&remote_address, &len);
S9xNPSetAction ("Setting socket options...", TRUE);
val2.l_onoff = 1;
val2.l_linger = 0;
if (setsockopt (new_fd, SOL_SOCKET, SO_LINGER,
(char *) &val2, sizeof (val2)) < 0)
{
S9xNPSetError ("Setting socket options failed.");
close (new_fd);
return;
}
for (i = 0; i < NP_MAX_CLIENTS; i++)
{
if (!NPServer.Clients [i].Connected)
{
NPServer.NumClients++;
NPServer.Clients [i].Socket = new_fd;
NPServer.Clients [i].SendSequenceNum = 0;
NPServer.Clients [i].ReceiveSequenceNum = 0;
NPServer.Clients [i].Connected = TRUE;
NPServer.Clients [i].SaidHello = FALSE;
NPServer.Clients [i].Paused = FALSE;
NPServer.Clients [i].Ready = FALSE;
NPServer.Clients [i].ROMName = NULL;
NPServer.Clients [i].HostName = NULL;
NPServer.Clients [i].Who = NULL;
break;
}
}
if (i >= NP_MAX_CLIENTS)
{
S9xNPSetError ("SERVER: Maximum number of NetPlay Clients have already connected.");
close (new_fd);
return;
}
if (remote_address.sin_family == AF_INET)
{
#ifdef NP_DEBUG
printf ("SERVER: Looking up new client's hostname @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("SERVER: Looking up new client's hostname...", TRUE);
host = gethostbyaddr ((char *) &remote_address.sin_addr,
sizeof (remote_address.sin_addr), AF_INET);
if (host)
{
#ifdef NP_DEBUG
printf ("SERVER: resolved new client's hostname (%s) @%ld\n", host->h_name, S9xGetMilliTime () - START);
#endif
sprintf (NetPlay.WarningMsg, "SERVER: Player %d on %s has connected.", i + 1, host->h_name);
NPServer.Clients [i].HostName = strdup (host->h_name);
}
else
{
char *ip = inet_ntoa (remote_address.sin_addr);
if (ip)
NPServer.Clients [i].HostName = strdup (ip);
#ifdef NP_DEBUG
printf ("SERVER: couldn't resolve new client's hostname (%s) @%ld\n", ip ? ip : "Unknown", S9xGetMilliTime () - START);
#endif
sprintf (NetPlay.WarningMsg, "SERVER: Player %d on %s has connected.", i + 1, ip ? ip : "Unknown");
}
S9xNPSetWarning (NetPlay.WarningMsg);
}
#ifdef NP_DEBUG
printf ("SERVER: waiting for HELLO message from new client @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("SERVER: Waiting for HELLO message from new client...");
}
static bool8 server_continue = TRUE;
static bool8 S9xNPServerInit (int port)
{
struct sockaddr_in address;
int i;
int val;
if (!S9xNPInitialise ())
return (FALSE);
for (i = 0; i < NP_MAX_CLIENTS; i++)
{
NPServer.Clients [i].SendSequenceNum = 0;
NPServer.Clients [i].ReceiveSequenceNum = 0;
NPServer.Clients [i].Connected = FALSE;
NPServer.Clients [i].SaidHello = FALSE;
NPServer.Clients [i].Paused = FALSE;
NPServer.Clients [i].Ready = FALSE;
NPServer.Clients [i].Socket = 0;
NPServer.Clients [i].ROMName = NULL;
NPServer.Clients [i].HostName = NULL;
NPServer.Clients [i].Who = NULL;
NPServer.Joypads [i] = 0;
}
NPServer.NumClients = 0;
NPServer.FrameCount = 0;
#ifdef NP_DEBUG
printf ("SERVER: Creating socket @%ld\n", S9xGetMilliTime () - START);
#endif
if ((NPServer.Socket = socket (AF_INET, SOCK_STREAM, 0)) < 0)
{
S9xNPSetError ("NetPlay Server: Can't create listening socket.");
return (FALSE);
}
val = 1;
setsockopt (NPServer.Socket, SOL_SOCKET, SO_REUSEADDR,
(char *)&val, sizeof (val));
memset (&address, 0, sizeof (address));
address.sin_family = AF_INET;
address.sin_addr.s_addr = htonl (INADDR_ANY);
address.sin_port = htons (port);
#ifdef NP_DEBUG
printf ("SERVER: Binding socket to address and port @%ld\n", S9xGetMilliTime () - START);
#endif
if (bind (NPServer.Socket, (struct sockaddr *) &address, sizeof (address)) < 0)
{
S9xNPSetError ("NetPlay Server: Can't bind socket to port number.\nPort already in use?");
return (FALSE);
}
#ifdef NP_DEBUG
printf ("SERVER: Getting socket to listen @%ld\n", S9xGetMilliTime () - START);
#endif
if (listen (NPServer.Socket, NP_MAX_CLIENTS) < 0)
{
S9xNPSetError ("NetPlay Server: Can't get new socket to listen.");
return (FALSE);
}
#ifdef NP_DEBUG
printf ("SERVER: Init complete @%ld\n", S9xGetMilliTime () - START);
#endif
return (TRUE);
}
void S9xNPSendServerPause (bool8 paused)
{
#ifdef NP_DEBUG
printf ("SERVER: Pause - %s @%ld\n", paused ? "YES" : "NO", S9xGetMilliTime () - START);
#endif
uint8 pause [7];
uint8 *ptr = pause;
*ptr++ = NP_SERV_MAGIC;
*ptr++ = 0;
*ptr++ = NP_SERV_PAUSE | (paused ? 0x20 : 0);
WRITE_LONG (ptr, NPServer.FrameCount);
S9xNPSendToAllClients (pause, 7);
}
void S9xNPSendJoypadSwap()
{
#ifdef NP_DEBUG
printf("SERVER: Swap Joypads - @%ld\n", S9xGetMilliTime() - START);
#endif
uint8 swap[7];
uint8 *ptr = swap;
*ptr++ = NP_SERV_MAGIC;
*ptr++ = 0;
*ptr++ = NP_SERV_JOYPAD_SWAP;
WRITE_LONG(ptr, 7);
S9xNPSendToAllClients(swap, 7);
}
void S9xNPServerLoop (void *)
{
#ifdef __WIN32__
BOOL success = FALSE;
#else
bool8 success = FALSE;
static struct timeval next1 = {0, 0};
struct timeval now;
#endif
int pausedState = -1, newPausedState = -1;
while (server_continue)
{
fd_set read_fds;
struct timeval timeout;
int res;
int i;
int max_fd = NPServer.Socket;
#ifdef __WIN32__
Sleep (0);
#endif
if (success && !(Settings.Paused && !Settings.FrameAdvance) && !Settings.StopEmulation &&
!Settings.ForcedPause && !NPServer.Paused)
{
S9xNPSendHeartBeat ();
newPausedState = 0;
}
else
{
newPausedState = 1;
}
if(pausedState != newPausedState)
{
pausedState = newPausedState;
// S9xNPSendServerPause(pausedState); // XXX: doesn't seem to work yet...
}
do
{
FD_ZERO (&read_fds);
FD_SET (NPServer.Socket, &read_fds);
for (i = 0; i < NP_MAX_CLIENTS; i++)
{
if (NPServer.Clients [i].Connected)
{
FD_SET (NPServer.Clients [i].Socket, &read_fds);
if (NPServer.Clients [i].Socket > max_fd)
max_fd = NPServer.Clients [i].Socket;
}
}
timeout.tv_sec = 0;
timeout.tv_usec = 1000;
res = select (max_fd + 1, &read_fds, NULL, NULL, &timeout);
if (res > 0)
{
if (FD_ISSET (NPServer.Socket, &read_fds))
S9xNPAcceptClient (NPServer.Socket, FALSE);
for (i = 0; i < NP_MAX_CLIENTS; i++)
{
if (NPServer.Clients [i].Connected &&
FD_ISSET (NPServer.Clients [i].Socket, &read_fds))
{
S9xNPProcessClient (i);
}
}
}
} while (res > 0);
#ifdef __WIN32__
success = WaitForSingleObject (GUI.ServerTimerSemaphore, 200) == WAIT_OBJECT_0;
#else
while (gettimeofday (&now, NULL) < 0) ;
/* If there is no known "next" frame, initialize it now */
if (next1.tv_sec == 0) { next1 = now; ++next1.tv_usec; }
success=FALSE;
if (timercmp(&next1, &now, >))
{
/* If we're ahead of time, sleep a while */
unsigned timeleft =
(next1.tv_sec - now.tv_sec) * 1000000
+ next1.tv_usec - now.tv_usec;
usleep(timeleft<(200*1000)?timeleft:(200*1000));
}
if (!timercmp(&next1, &now, >))
{
/* Calculate the timestamp of the next frame. */
next1.tv_usec += Settings.FrameTime;
if (next1.tv_usec >= 1000000)
{
next1.tv_sec += next1.tv_usec / 1000000;
next1.tv_usec %= 1000000;
}
success=TRUE;
}
#endif
while (NPServer.TaskHead != NPServer.TaskTail)
{
void *task_data = NPServer.TaskQueue [NPServer.TaskHead].Data;
#if defined(NP_DEBUG) && NP_DEBUG == 2
printf ("SERVER: task %d @%ld\n", NPServer.TaskQueue [NPServer.TaskHead].Task, S9xGetMilliTime () - START);
#endif
switch (NPServer.TaskQueue [NPServer.TaskHead].Task)
{
case NP_SERVER_SEND_ROM_IMAGE:
S9xNPSendROMImageToAllClients ();
break;
case NP_SERVER_SYNC_CLIENT:
NPServer.Clients [(pint) task_data].Ready = FALSE;
S9xNPRecomputePause ();
S9xNPSyncClient ((pint) task_data);
break;
case NP_SERVER_SYNC_ALL:
S9xNPSyncClients ();
break;
case NP_SERVER_SEND_FREEZE_FILE_ALL:
S9xNPSendFreezeFileToAllClients ((char *) task_data);
free ((char *) task_data);
break;
case NP_SERVER_SEND_ROM_LOAD_REQUEST_ALL:
S9xNPSendROMLoadRequest ((char *) task_data);
free ((char *) task_data);
break;
case NP_SERVER_RESET_ALL:
S9xNPNoClientReady (0);
S9xNPWaitForEmulationToComplete ();
S9xNPSetAction ("SERVER: Sending RESET to all clients...", TRUE);
#ifdef NP_DEBUG
printf ("SERVER: Sending RESET to all clients @%ld\n", S9xGetMilliTime () - START);
#endif
{
uint8 reset [7];
uint8 *ptr;
ptr = reset;
*ptr++ = NP_SERV_MAGIC;
*ptr++ = 0;
*ptr++ = NP_SERV_RESET;
WRITE_LONG (ptr, NPServer.FrameCount);
S9xNPSendToAllClients (reset, 7);
}
S9xNPSetAction ("", TRUE);
break;
case NP_SERVER_SEND_SRAM:
NPServer.Clients [(pint) task_data].Ready = FALSE;
S9xNPRecomputePause ();
S9xNPWaitForEmulationToComplete ();
S9xNPSendSRAMToClient ((pint) task_data);
break;
case NP_SERVER_SEND_SRAM_ALL:
S9xNPNoClientReady ();
S9xNPWaitForEmulationToComplete ();
S9xNPSendSRAMToAllClients ();
break;
default:
S9xNPSetError ("SERVER: *** Unknown task ***\n");
break;
}
NPServer.TaskHead = (NPServer.TaskHead + 1) % NP_MAX_TASKS;
}
}
#ifdef NP_DEBUG
printf ("SERVER: Server thread exiting @%ld\n", S9xGetMilliTime () - START);
#endif
// OV2: S9xNPStopServer has already been called if we get here
// S9xNPStopServer ();
}
bool8 S9xNPStartServer (int port)
{
#ifdef __WIN32__
static int p;
p = port;
#endif
#ifdef NP_DEBUG
printf ("SERVER: Starting server on port %d @%ld\n", port, S9xGetMilliTime () - START);
#endif
server_continue = TRUE;
if (S9xNPServerInit (port))
#ifdef __WIN32__
return (_beginthread (S9xNPServerLoop, 0, &p) != (uintptr_t)(~0));
#else
S9xNPServerLoop(NULL);
return (TRUE);
#endif
return (FALSE);
}
void S9xNPStopServer ()
{
#ifdef NP_DEBUG
printf ("SERVER: Stopping server @%ld\n", S9xGetMilliTime () - START);
#endif
server_continue = FALSE;
close (NPServer.Socket);
for (int i = 0; i < NP_MAX_CLIENTS; i++)
{
if (NPServer.Clients [i].Connected)
S9xNPShutdownClient(i, FALSE);
}
}
#ifdef __WIN32__
void S9xGetTimeOfDay (struct timeval *n)
{
unsigned long t = S9xGetMilliTime ();
n->tv_sec = t / 1000;
n->tv_usec = (t % 1000) * 1000;
}
#endif
void S9xNPSendROMImageToAllClients ()
{
S9xNPNoClientReady ();
S9xNPWaitForEmulationToComplete ();
int c;
for (c = NP_ONE_CLIENT; c < NP_MAX_CLIENTS; c++)
{
if (NPServer.Clients [c].SaidHello)
S9xNPSendROMImageToClient (c);
}
if (NPServer.SyncByReset)
{
S9xNPServerAddTask (NP_SERVER_SEND_SRAM_ALL, 0);
S9xNPServerAddTask (NP_SERVER_RESET_ALL, 0);
}
else
S9xNPSyncClient (-1);
}
bool8 S9xNPSendROMImageToClient (int c)
{
#ifdef NP_DEBUG
printf ("SERVER: Sending ROM image to player %d @%ld\n", c + 1, S9xGetMilliTime () - START);
#endif
sprintf (NetPlay.ActionMsg, "Sending ROM image to player %d...", c + 1);
S9xNPSetAction (NetPlay.ActionMsg, TRUE);
uint8 header [7 + 1 + 4];
uint8 *ptr = header;
int len = sizeof (header) + Memory.CalculatedSize +
strlen (Memory.ROMFilename) + 1;
*ptr++ = NP_SERV_MAGIC;
*ptr++ = NPServer.Clients [c].SendSequenceNum++;
*ptr++ = NP_SERV_ROM_IMAGE;
WRITE_LONG (ptr, len);
ptr += 4;
*ptr++ = Memory.HiROM;
WRITE_LONG (ptr, Memory.CalculatedSize);
if (!S9xNPSSendData (NPServer.Clients [c].Socket, header, sizeof (header)) ||
!S9xNPSSendData (NPServer.Clients [c].Socket, Memory.ROM,
Memory.CalculatedSize) ||
!S9xNPSSendData (NPServer.Clients [c].Socket, (uint8 *) Memory.ROMFilename,
strlen (Memory.ROMFilename) + 1))
{
S9xNPShutdownClient (c, TRUE);
return (FALSE);
}
return (TRUE);
}
void S9xNPSyncClients ()
{
S9xNPNoClientReady ();
S9xNPSyncClient (-1);
}
void S9xNPSyncClient (int client)
{
#ifdef HAVE_MKSTEMP
char fname[] = "/tmp/snes9x_fztmpXXXXXX";
int fd=-1;
#else
char fname [L_tmpnam];
#endif
S9xNPWaitForEmulationToComplete ();
S9xNPSetAction ("SERVER: Freezing game...", TRUE);
#ifdef HAVE_MKSTEMP
if ( ((fd=mkstemp(fname)) >= 0) && S9xFreezeGame(fname) )
#else
if ( tmpnam(fname) && S9xFreezeGame(fname) )
#endif
{
uint8 *data;
uint32 len;
S9xNPSetAction ("SERVER: Loading freeze file...", TRUE);
if (S9xNPLoadFreezeFile (fname, data, len))
{
int c;
if (client < 0)
{
for (c = NP_ONE_CLIENT; c < NP_MAX_CLIENTS; c++)
{
if (NPServer.Clients [c].SaidHello)
{
NPServer.Clients [c].Ready = FALSE;
S9xNPRecomputePause ();
S9xNPSendFreezeFile (c, data, len);
}
}
}
else
{
NPServer.Clients [client].Ready = FALSE;
S9xNPRecomputePause ();
S9xNPSendFreezeFile (client, data, len);
}
delete data;
}
remove (fname);
}
#ifdef HAVE_MKSTEMP
if (fd != -1)
close(fd);
#endif
}
bool8 S9xNPLoadFreezeFile (const char *fname, uint8 *&data, uint32 &len)
{
FILE *ff;
if ((ff = fopen (fname, "rb")))
{
fseek (ff, 0, SEEK_END);
len = ftell (ff);
fseek (ff, 0, SEEK_SET);
data = new uint8 [len];
bool8 ok = (fread (data, 1, len, ff) == len);
fclose (ff);
return (ok);
}
return (FALSE);
}
void S9xNPSendFreezeFile (int c, uint8 *data, uint32 len)
{
#ifdef NP_DEBUG
printf ("SERVER: Sending freeze file to player %d @%ld\n", c + 1, S9xGetMilliTime () - START);
#endif
sprintf (NetPlay.ActionMsg, "SERVER: Sending freeze-file to player %d...", c + 1);
S9xNPSetAction (NetPlay.ActionMsg, TRUE);
uint8 header [7 + 4];
uint8 *ptr = header;
*ptr++ = NP_SERV_MAGIC;
*ptr++ = NPServer.Clients [c].SendSequenceNum++;
*ptr++ = NP_SERV_FREEZE_FILE;
WRITE_LONG (ptr, len + 7 + 4);
ptr += 4;
WRITE_LONG (ptr, NPServer.FrameCount);
if (!S9xNPSSendData (NPServer.Clients [c].Socket, header, 7 + 4) ||
!S9xNPSSendData (NPServer.Clients [c].Socket, data, len))
{
S9xNPShutdownClient (c, TRUE);
}
S9xNPSetAction ("", TRUE);
}
void S9xNPRecomputePause ()
{
int c;
for (c = 0; c < NP_MAX_CLIENTS; c++)
{
if (NPServer.Clients [c].SaidHello &&
(!NPServer.Clients [c].Ready || NPServer.Clients [c].Paused))
{
#if defined(NP_DEBUG) && NP_DEBUG == 2
printf ("SERVER: Paused because of client %d (%d,%d) @%ld\n", c, NPServer.Clients [c].Ready, NPServer.Clients [c].Paused, S9xGetMilliTime () - START);
#endif
NPServer.Paused = TRUE;
return;
}
}
#if defined(NP_DEBUG) && NP_DEBUG == 2
printf ("SERVER: not paused @%ld\n", S9xGetMilliTime () - START);
#endif
NPServer.Paused = FALSE;
}
void S9xNPNoClientReady (int start_index)
{
int c;
for (c = start_index; c < NP_MAX_CLIENTS; c++)
NPServer.Clients [c].Ready = FALSE;
S9xNPRecomputePause ();
}
void S9xNPSendROMLoadRequest (const char *filename)
{
S9xNPNoClientReady ();
int len = 7 + strlen (filename) + 1;
uint8 *data = new uint8 [len];
uint8 *ptr = data;
*ptr++ = NP_SERV_MAGIC;
*ptr++ = 0;
*ptr++ = NP_SERV_LOAD_ROM;
WRITE_LONG (ptr, len);
ptr += 4;
strcpy ((char *) ptr, filename);
for (int i = NP_ONE_CLIENT; i < NP_MAX_CLIENTS; i++)
{
if (NPServer.Clients [i].SaidHello)
{
#ifdef NP_DEBUG
printf ("SERVER: Sending load ROM requesting to player %d @%ld\n", i + 1, S9xGetMilliTime () - START);
#endif
sprintf (NetPlay.WarningMsg, "SERVER: sending ROM load request to player %d...", i + 1);
S9xNPSetAction (NetPlay.WarningMsg, TRUE);
data [1] = NPServer.Clients [i].SendSequenceNum++;
if (!S9xNPSSendData (NPServer.Clients [i].Socket, data, len))
{
S9xNPShutdownClient (i, TRUE);
}
}
}
delete[] data;
}
void S9xNPSendSRAMToAllClients ()
{
int i;
for (i = NP_ONE_CLIENT; i < NP_MAX_CLIENTS; i++)
{
if (NPServer.Clients [i].SaidHello)
S9xNPSendSRAMToClient (i);
}
}
void S9xNPSendSRAMToClient (int c)
{
#ifdef NP_DEBUG
printf ("SERVER: Sending S-RAM data to player %d @%ld\n", c + 1, S9xGetMilliTime () - START);
#endif
uint8 sram [7];
int SRAMSize = Memory.SRAMSize ?
(1 << (Memory.SRAMSize + 3)) * 128 : 0;
if (Memory.LoROM)
SRAMSize = SRAMSize < 0x70000 ? SRAMSize : 0x70000;
else if (Memory.HiROM)
SRAMSize = SRAMSize < 0x40000 ? SRAMSize : 0x40000;
int len = 7 + SRAMSize;
sprintf (NetPlay.ActionMsg, "SERVER: Sending S-RAM to player %d...", c + 1);
S9xNPSetAction (NetPlay.ActionMsg, TRUE);
uint8 *ptr = sram;
*ptr++ = NP_SERV_MAGIC;
*ptr++ = NPServer.Clients [c].SendSequenceNum++;
*ptr++ = NP_SERV_SRAM_DATA;
WRITE_LONG (ptr, len);
if (!S9xNPSSendData (NPServer.Clients [c].Socket,
sram, sizeof (sram)) ||
(len > 7 &&
!S9xNPSSendData (NPServer.Clients [c].Socket,
Memory.SRAM, len - 7)))
{
S9xNPShutdownClient (c, TRUE);
}
}
void S9xNPSendFreezeFileToAllClients (const char *filename)
{
uint8 *data;
uint32 len;
if (NPServer.NumClients > NP_ONE_CLIENT && S9xNPLoadFreezeFile (filename, data, len))
{
S9xNPNoClientReady ();
for (int c = NP_ONE_CLIENT; c < NP_MAX_CLIENTS; c++)
{
if (NPServer.Clients [c].SaidHello)
S9xNPSendFreezeFile (c, data, len);
}
delete data;
}
}
void S9xNPServerAddTask (uint32 task, void *data)
{
NPServer.TaskQueue [NPServer.TaskTail].Task = task;
NPServer.TaskQueue [NPServer.TaskTail].Data = data;
NPServer.TaskTail = (NPServer.TaskTail + 1) % NP_MAX_TASKS;
}
void S9xNPReset ()
{
S9xNPNoClientReady (0);
S9xNPServerAddTask (NP_SERVER_RESET_ALL, 0);
}
void S9xNPWaitForEmulationToComplete ()
{
#ifdef NP_DEBUG
printf ("SERVER: WaitForEmulationToComplete start @%ld\n", S9xGetMilliTime () - START);
#endif
while (!NetPlay.PendingWait4Sync && NetPlay.Connected &&
!Settings.ForcedPause && !Settings.StopEmulation &&
!(Settings.Paused && !Settings.FrameAdvance))
{
#ifdef __WIN32__
Sleep (40);
#endif
}
#ifdef NP_DEBUG
printf ("SERVER: WaitForEmulationToComplete end @%ld\n", S9xGetMilliTime () - START);
#endif
}
void S9xNPServerQueueSyncAll ()
{
if (Settings.NetPlay && Settings.NetPlayServer &&
NPServer.NumClients > NP_ONE_CLIENT)
{
S9xNPNoClientReady ();
S9xNPDiscardHeartbeats ();
S9xNPServerAddTask (NP_SERVER_SYNC_ALL, 0);
}
}
void S9xNPServerQueueSendingROMImage ()
{
if (Settings.NetPlay && Settings.NetPlayServer &&
NPServer.NumClients > NP_ONE_CLIENT)
{
S9xNPNoClientReady ();
S9xNPDiscardHeartbeats ();
S9xNPServerAddTask (NP_SERVER_SEND_ROM_IMAGE, 0);
}
}
void S9xNPServerQueueSendingFreezeFile (const char *filename)
{
if (Settings.NetPlay && Settings.NetPlayServer &&
NPServer.NumClients > NP_ONE_CLIENT)
{
S9xNPNoClientReady ();
S9xNPDiscardHeartbeats ();
S9xNPServerAddTask (NP_SERVER_SEND_FREEZE_FILE_ALL,
(void *) strdup (filename));
}
}
void S9xNPServerQueueSendingLoadROMRequest (const char *filename)
{
if (Settings.NetPlay && Settings.NetPlayServer &&
NPServer.NumClients > NP_ONE_CLIENT)
{
S9xNPNoClientReady ();
S9xNPDiscardHeartbeats ();
S9xNPServerAddTask (NP_SERVER_SEND_ROM_LOAD_REQUEST_ALL,
(void *) strdup (filename));
}
}
#ifndef __WIN32__
uint32 S9xGetMilliTime ()
{
static bool8 first = TRUE;
static long start_sec;
struct timeval tv;
gettimeofday (&tv, NULL);
if (first)
{
start_sec = tv.tv_sec;
first = FALSE;
}
return ((uint32) ((tv.tv_sec - start_sec) * 1000 + tv.tv_usec / 1000));
}
#endif
#endif
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