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netplay.cpp
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/**********************************************************************************
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
(c) Copyright 1996 - 2002 Gary Henderson ([email protected]) and
Jerremy Koot ([email protected])
(c) Copyright 2002 - 2004 Matthew Kendora
(c) Copyright 2002 - 2005 Peter Bortas ([email protected])
(c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/)
(c) Copyright 2001 - 2006 John Weidman ([email protected])
(c) Copyright 2002 - 2006 Brad Jorsch ([email protected]),
funkyass ([email protected]),
Kris Bleakley ([email protected]),
Nach ([email protected]), and
zones ([email protected])
BS-X C emulator code
(c) Copyright 2005 - 2006 Dreamer Nom,
zones
C4 x86 assembler and some C emulation code
(c) Copyright 2000 - 2003 _Demo_ ([email protected]),
Nach,
zsKnight ([email protected])
C4 C++ code
(c) Copyright 2003 - 2006 Brad Jorsch,
Nach
DSP-1 emulator code
(c) Copyright 1998 - 2006 _Demo_,
Andreas Naive ([email protected])
Gary Henderson,
Ivar ([email protected]),
John Weidman,
Kris Bleakley,
Matthew Kendora,
Nach,
neviksti ([email protected])
DSP-2 emulator code
(c) Copyright 2003 John Weidman,
Kris Bleakley,
Lord Nightmare ([email protected]),
Matthew Kendora,
neviksti
DSP-3 emulator code
(c) Copyright 2003 - 2006 John Weidman,
Kris Bleakley,
Lancer,
z80 gaiden
DSP-4 emulator code
(c) Copyright 2004 - 2006 Dreamer Nom,
John Weidman,
Kris Bleakley,
Nach,
z80 gaiden
OBC1 emulator code
(c) Copyright 2001 - 2004 zsKnight,
pagefault ([email protected]),
Kris Bleakley,
Ported from x86 assembler to C by sanmaiwashi
SPC7110 and RTC C++ emulator code
(c) Copyright 2002 Matthew Kendora with research by
zsKnight,
John Weidman,
Dark Force
S-DD1 C emulator code
(c) Copyright 2003 Brad Jorsch with research by
Andreas Naive,
John Weidman
S-RTC C emulator code
(c) Copyright 2001-2006 byuu,
John Weidman
ST010 C++ emulator code
(c) Copyright 2003 Feather,
John Weidman,
Kris Bleakley,
Matthew Kendora
Super FX x86 assembler emulator code
(c) Copyright 1998 - 2003 _Demo_,
pagefault,
zsKnight,
Super FX C emulator code
(c) Copyright 1997 - 1999 Ivar,
Gary Henderson,
John Weidman
Sound DSP emulator code is derived from SNEeSe and OpenSPC:
(c) Copyright 1998 - 2003 Brad Martin
(c) Copyright 1998 - 2006 Charles Bilyue'
SH assembler code partly based on x86 assembler code
(c) Copyright 2002 - 2004 Marcus Comstedt ([email protected])
2xSaI filter
(c) Copyright 1999 - 2001 Derek Liauw Kie Fa
HQ2x filter
(c) Copyright 2003 Maxim Stepin ([email protected])
Specific ports contains the works of other authors. See headers in
individual files.
Snes9x homepage: http://www.snes9x.com
Permission to use, copy, modify and/or distribute Snes9x in both binary
and source form, for non-commercial purposes, is hereby granted without
fee, providing that this license information and copyright notice appear
with all copies and any derived work.
This software is provided 'as-is', without any express or implied
warranty. In no event shall the authors be held liable for any damages
arising from the use of this software or it's derivatives.
Snes9x is freeware for PERSONAL USE only. Commercial users should
seek permission of the copyright holders first. Commercial use includes,
but is not limited to, charging money for Snes9x or software derived from
Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
using Snes9x as a promotion for your commercial product.
The copyright holders request that bug fixes and improvements to the code
should be forwarded to them so everyone can benefit from the modifications
in future versions.
Super NES and Super Nintendo Entertainment System are trademarks of
Nintendo Co., Limited and its subsidiary companies.
**********************************************************************************/
#include "port.h"
#ifdef NETPLAY_SUPPORT
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <memory.h>
#include <sys/types.h>
#ifndef __WIN32__
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#endif
#if defined (__WIN32__)
#include <winsock.h>
#include <process.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)
#else
#include <netdb.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#ifdef __SVR4
#include <sys/stropts.h>
#endif
#endif
#ifdef USE_THREADS
#include <pthread.h>
#include <sched.h>
#include <semaphore.h>
#endif
#include "snes9x.h"
#include "cpuexec.h"
#include "netplay.h"
#include "memmap.h"
#include "snapshot.h"
#include "display.h"
void S9xNPClientLoop (void *);
bool8 S9xNPLoadROM (uint32 len);
bool8 S9xNPLoadROMDialog (const char *);
bool8 S9xNPGetROMImage (uint32 len);
void S9xNPGetSRAMData (uint32 len);
void S9xNPGetFreezeFile (uint32 len);
unsigned long START = 0;
bool8 S9xNPConnectToServer (const char *hostname, int port,
const char *rom_name)
{
if (!S9xNPInitialise ())
return (FALSE);
S9xNPDisconnect ();
NetPlay.MySequenceNum = 0;
NetPlay.ServerSequenceNum = 0;
NetPlay.Connected = FALSE;
NetPlay.Abort = FALSE;
NetPlay.Player = 0;
NetPlay.Paused = FALSE;
NetPlay.PercentageComplete = 0;
NetPlay.Socket = 0;
if (NetPlay.ServerHostName)
free ((char *) NetPlay.ServerHostName);
NetPlay.ServerHostName = strdup (hostname);
if (NetPlay.ROMName)
free ((char *) NetPlay.ROMName);
NetPlay.ROMName = strdup (rom_name);
NetPlay.Port = port;
NetPlay.PendingWait4Sync = FALSE;
#ifdef __WIN32__
if (GUI.ClientSemaphore == NULL)
GUI.ClientSemaphore = CreateSemaphore (NULL, 0, NP_JOYPAD_HIST_SIZE, NULL);
if (NetPlay.ReplyEvent == NULL)
NetPlay.ReplyEvent = CreateEvent (NULL, FALSE, FALSE, NULL);
_beginthread (S9xNPClientLoop, 0, NULL);
#endif
return (TRUE);
}
bool8 S9xNPConnect ()
{
struct sockaddr_in address;
struct hostent *hostinfo;
unsigned int addr;
address.sin_family = AF_INET;
address.sin_port = htons (NetPlay.Port);
#ifdef NP_DEBUG
printf ("CLIENT: Looking up server's hostname (%s) @%ld\n", NetPlay.ServerHostName, S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Looking up server's hostname...");
if ((int) (addr = inet_addr (NetPlay.ServerHostName)) == -1)
{
if ((hostinfo = gethostbyname (NetPlay.ServerHostName)))
{
memcpy ((char *)&address.sin_addr, hostinfo->h_addr,
hostinfo->h_length);
}
else
{
S9xNPSetError ("\
Unable to look up server's IP address from hostname.\n\n\
Unknown hostname or may be your nameserver isn't set\n\
up correctly?");
return (FALSE);
}
}
else
{
memcpy ((char *)&address.sin_addr, &addr, sizeof (addr));
}
#ifdef NP_DEBUG
printf ("CLIENT: Creating socket @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Creating network socket...");
if ((NetPlay.Socket = socket (AF_INET, SOCK_STREAM, 0)) < 0)
{
S9xNPSetError ("Creating network socket failed.");
return (FALSE);
}
#ifdef NP_DEBUG
printf ("CLIENT: Trying to connect to server @%ld...\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Trying to connect to Snes9X server...");
if (connect (NetPlay.Socket, (struct sockaddr *) &address, sizeof (address)) < 0)
{
char buf [100];
#ifdef __WIN32__
if (WSAGetLastError () == WSAECONNREFUSED)
#else
if (errno == ECONNREFUSED)
#endif
{
S9xNPSetError ("\
Connection to remote server socket refused:\n\n\
Is there actually a Snes9X NetPlay server running\n\
on the remote machine on this port?");
}
else
{
sprintf (buf, "Connection to server failed with error number %d",
#ifdef __WIN32__
WSAGetLastError ()
#else
errno
#endif
);
S9xNPDisconnect ();
}
return (FALSE);
}
NetPlay.Connected = TRUE;
#ifdef NP_DEBUG
printf ("CLIENT: Sending 'HELLO' message @%ld...\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Sending 'HELLO' message...");
/* Send the server a HELLO packet*/
int len = 7 + 4 + strlen (NetPlay.ROMName) + 1;
uint8 *tmp = new uint8 [len];
uint8 *ptr = tmp;
*ptr++ = NP_CLNT_MAGIC;
*ptr++ = NetPlay.MySequenceNum++;
*ptr++ = NP_CLNT_HELLO;
WRITE_LONG (ptr, len);
ptr += 4;
#ifdef __WIN32__
uint32 ft = Settings.FrameTime * 1000;
WRITE_LONG (ptr, ft);
#else
WRITE_LONG (ptr, Settings.FrameTime);
#endif
ptr += 4;
strcpy ((char *) ptr, NetPlay.ROMName);
if (!S9xNPSendData (NetPlay.Socket, tmp, len))
{
S9xNPSetError ("Sending 'HELLO' message failed.");
S9xNPDisconnect ();
delete tmp;
return (FALSE);
}
delete tmp;
#ifdef NP_DEBUG
printf ("CLIENT: Waiting for 'WELCOME' reply from server @%ld...\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Waiting for 'HELLO' reply from server...");
uint8 header [7];
if (!S9xNPGetData (NetPlay.Socket, header, 7) ||
header [0] != NP_SERV_MAGIC || header [1] != 0 ||
(header [2] & 0x1f) != NP_SERV_HELLO)
{
S9xNPSetError ("Error in 'HELLO' reply packet received from server.");
S9xNPDisconnect ();
return (FALSE);
}
#ifdef NP_DEBUG
printf ("CLIENT: Got 'WELCOME' reply @%ld\n", S9xGetMilliTime () - START);
#endif
len = READ_LONG (&header [3]);
if (len > 256)
{
S9xNPSetError ("Error in 'HELLO' reply packet received from server.");
S9xNPDisconnect ();
return (FALSE);
}
uint8 *data = new uint8 [len];
if (!S9xNPGetData (NetPlay.Socket, data, len - 7))
{
S9xNPSetError ("Error in 'HELLO' reply packet received from server.");
delete data;
S9xNPDisconnect ();
return (FALSE);
}
if (data [0] != NP_VERSION)
{
S9xNPSetError ("\
The Snes9X NetPlay server implements a different\n\
version of the protocol. Disconnecting.");
delete data;
S9xNPDisconnect ();
return (FALSE);
}
NetPlay.FrameCount = READ_LONG (&data [2]);
if (!(header [2] & 0x80) &&
strcmp ((char *) data + 4 + 2, NetPlay.ROMName) != 0)
{
if (!S9xNPLoadROMDialog ((char *) data + 4 + 2))
{
delete data;
S9xNPDisconnect ();
return (FALSE);
}
}
NetPlay.Player = data [1];
delete data;
NetPlay.PendingWait4Sync = TRUE;
Settings.NetPlay = TRUE;
S9xNPResetJoypadReadPos ();
NetPlay.ServerSequenceNum = 1;
#ifdef NP_DEBUG
printf ("CLIENT: Sending 'READY' to server @%ld...\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Sending 'READY' to the server...");
return (S9xNPSendReady ((header [2] & 0x80) ?
NP_CLNT_WAITING_FOR_ROM_IMAGE :
NP_CLNT_READY));
}
bool8 S9xNPSendReady (uint8 op)
{
uint8 ready [7];
uint8 *ptr = ready;
*ptr++ = NP_CLNT_MAGIC;
*ptr++ = NetPlay.MySequenceNum++;
*ptr++ = op;
WRITE_LONG (ptr, 7);
ptr += 4;
if (!S9xNPSendData (NetPlay.Socket, ready, 7))
{
S9xNPDisconnect ();
S9xNPSetError ("Sending 'READY' message failed.");
return (FALSE);
}
return (TRUE);
}
bool8 S9xNPSendPause (bool8 paused)
{
#ifdef NP_DEBUG
printf ("CLIENT: Pause - %s @%ld\n", paused ? "YES" : "NO", S9xGetMilliTime () - START);
#endif
uint8 pause [7];
uint8 *ptr = pause;
*ptr++ = NP_CLNT_MAGIC;
*ptr++ = NetPlay.MySequenceNum++;
*ptr++ = NP_CLNT_PAUSE | (paused ? 0x80 : 0);
WRITE_LONG (ptr, 7);
ptr += 4;
if (!S9xNPSendData (NetPlay.Socket, pause, 7))
{
S9xNPSetError ("Sending 'PAUSE' message failed.");
S9xNPDisconnect ();
return (FALSE);
}
return (TRUE);
}
#ifdef __WIN32__
void S9xNPClientLoop (void *)
{
NetPlay.Waiting4EmulationThread = FALSE;
if (S9xNPConnect ())
{
S9xClearPause (PAUSE_NETPLAY_CONNECT);
while (NetPlay.Connected)
{
if (S9xNPWaitForHeartBeat ())
{
LONG prev;
if (!ReleaseSemaphore (GUI.ClientSemaphore, 1, &prev))
{
#ifdef NP_DEBUG
printf ("CLIENT: ReleaseSemaphore failed - already hit max count (%d) %ld\n", NP_JOYPAD_HIST_SIZE, S9xGetMilliTime () - START);
#endif
S9xNPSetWarning ("NetPlay: Client may be out of sync with server.");
}
else
{
if (!NetPlay.Waiting4EmulationThread &&
prev == (int) NetPlay.MaxBehindFrameCount)
{
NetPlay.Waiting4EmulationThread = TRUE;
S9xNPSendPause (TRUE);
}
}
}
else
S9xNPDisconnect ();
}
}
else
{
S9xClearPause (PAUSE_NETPLAY_CONNECT);
}
#ifdef NP_DEBUG
printf ("CLIENT: Client thread exiting @%ld\n", S9xGetMilliTime () - START);
#endif
}
#endif
bool8 S9xNPWaitForHeartBeat ()
{
uint8 header [3 + 4 + 4 * 5];
while (S9xNPGetData (NetPlay.Socket, header, 3 + 4))
{
if (header [0] != NP_SERV_MAGIC)
{
S9xNPSetError ("Bad magic value from server while waiting for heart-beat message\n");
S9xNPDisconnect ();
return (FALSE);
}
if (header [1] != NetPlay.ServerSequenceNum)
{
char buf [200];
sprintf (buf, "Unexpected message sequence number from server, expected %d, got %d\n", NetPlay.ServerSequenceNum, header [1]);
S9xNPSetWarning (buf);
NetPlay.ServerSequenceNum = header [1] + 1;
}
else
NetPlay.ServerSequenceNum++;
if ((header [2] & 0x1f) == NP_SERV_JOYPAD)
{
// Top 2 bits + 1 of opcode is joypad data count.
int num = (header [2] >> 6) + 1;
if (num)
{
if (!S9xNPGetData (NetPlay.Socket, header + 3 + 4, num * 4))
{
S9xNPSetError ("Error while receiving 'JOYPAD' message.");
S9xNPDisconnect ();
return (FALSE);
}
}
NetPlay.Frame [NetPlay.JoypadWriteInd] = READ_LONG (&header [3]);
for (int i = 0; i < num; i++)
{
NetPlay.Joypads [NetPlay.JoypadWriteInd][i] =
READ_LONG (&header [3 + 4 + i * sizeof (uint32)]);
}
NetPlay.Paused = (header [2] & 0x20) != 0;
NetPlay.JoypadWriteInd = (NetPlay.JoypadWriteInd + 1) % NP_JOYPAD_HIST_SIZE;
if (NetPlay.JoypadWriteInd != (NetPlay.JoypadReadInd + 1) % NP_JOYPAD_HIST_SIZE)
{
//printf ("(%d)", (NetPlay.JoypadWriteInd - NetPlay.JoypadReadInd) % NP_JOYPAD_HIST_SIZE); fflush (stdout);
}
//printf ("CLIENT: HB: @%d\n", S9xGetMilliTime () - START);
return (TRUE);
}
else
{
uint32 len = READ_LONG (&header [3]);
switch (header [2] & 0x1f)
{
case NP_SERV_RESET:
#ifdef NP_DEBUG
printf ("CLIENT: RESET received @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPDiscardHeartbeats ();
S9xReset ();
NetPlay.FrameCount = READ_LONG (&header [3]);
S9xNPResetJoypadReadPos ();
S9xNPSendReady ();
break;
case NP_SERV_PAUSE:
NetPlay.Paused = (header [2] & 0x20) != 0;
break;
case NP_SERV_LOAD_ROM:
#ifdef NP_DEBUG
printf ("CLIENT: LOAD_ROM received @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPDiscardHeartbeats ();
if (S9xNPLoadROM (len - 7))
S9xNPSendReady (NP_CLNT_LOADED_ROM);
break;
case NP_SERV_ROM_IMAGE:
#ifdef NP_DEBUG
printf ("CLIENT: ROM_IMAGE received @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPDiscardHeartbeats ();
if (S9xNPGetROMImage (len - 7))
S9xNPSendReady (NP_CLNT_RECEIVED_ROM_IMAGE);
break;
case NP_SERV_SRAM_DATA:
#ifdef NP_DEBUG
printf ("CLIENT: SRAM_DATA received @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPDiscardHeartbeats ();
S9xNPGetSRAMData (len - 7);
break;
case NP_SERV_FREEZE_FILE:
#ifdef NP_DEBUG
printf ("CLIENT: FREEZE_FILE received @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPDiscardHeartbeats ();
S9xNPGetFreezeFile (len - 7);
S9xNPResetJoypadReadPos ();
S9xNPSendReady ();
break;
default:
#ifdef NP_DEBUG
printf ("CLIENT: UNKNOWN received @%ld\n", S9xGetMilliTime () - START);
#endif
S9xNPDisconnect ();
return (FALSE);
}
}
}
S9xNPDisconnect ();
return (FALSE);
}
bool8 S9xNPLoadROMDialog (const char *rom_name)
{
NetPlay.Answer = FALSE;
#ifdef __WIN32__
ResetEvent (NetPlay.ReplyEvent);
#ifdef NP_DEBUG
printf ("CLIENT: Asking GUI thread to open ROM load dialog...\n");
#endif
PostMessage (GUI.hWnd, WM_USER + 3, (uint32) rom_name, (uint32) rom_name);
#ifdef NP_DEBUG
printf ("CLIENT: Waiting for reply from GUI thread...\n");
#endif
WaitForSingleObject (NetPlay.ReplyEvent, INFINITE);
#ifdef NP_DEBUG
printf ("CLIENT: Got reply from GUI thread (%d)\n", NetPlay.Answer);
#endif
#endif
return (NetPlay.Answer);
}
bool8 S9xNPLoadROM (uint32 len)
{
uint8 *data = new uint8 [len];
S9xNPSetAction ("Receiving ROM name...");
if (!S9xNPGetData (NetPlay.Socket, data, len))
{
S9xNPSetError ("Error while receiving ROM name.");
delete data;
S9xNPDisconnect ();
return (FALSE);
}
S9xNPSetAction ("Opening LoadROM dialog...");
if (!S9xNPLoadROMDialog ((char *) data))
{
S9xNPSetError ("Disconnected from NetPlay server because you are playing a different game!");
delete data;
S9xNPDisconnect ();
return (FALSE);
}
delete data;
return (TRUE);
}
bool8 S9xNPGetROMImage (uint32 len)
{
uint8 rom_info [5];
S9xNPSetAction ("Receiving ROM information...");
if (!S9xNPGetData (NetPlay.Socket, rom_info, 5))
{
S9xNPSetError ("Error while receiving ROM information.");
S9xNPDisconnect ();
return (FALSE);
}
uint32 CalculatedSize = READ_LONG (&rom_info [1]);
#ifdef NP_DEBUG
printf ("CLIENT: Hi-ROM: %s, Size: %04x\n", rom_info [0] ? "Y" : "N", CalculatedSize);
#endif
if (CalculatedSize + 5 >= len ||
CalculatedSize >= CMemory::MAX_ROM_SIZE)
{
S9xNPSetError ("Size error in ROM image data received from server.");
S9xNPDisconnect ();
return (FALSE);
}
Memory.HiROM = rom_info [0];
Memory.LoROM = !Memory.HiROM;
Memory.HeaderCount = 0;
Memory.CalculatedSize = CalculatedSize;
// Load up ROM image
#ifdef NP_DEBUG
printf ("CLIENT: Receiving ROM image @%ld...\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Receiving ROM image...");
if (!S9xNPGetData (NetPlay.Socket, Memory.ROM, Memory.CalculatedSize))
{
S9xNPSetError ("Error while receiving ROM image from server.");
Settings.StopEmulation = TRUE;
S9xNPDisconnect ();
return (FALSE);
}
#ifdef NP_DEBUG
printf ("CLIENT: Receiving ROM filename @%ld...\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Receiving ROM filename...");
uint32 filename_len = len - Memory.CalculatedSize - 5;
if (filename_len > _MAX_PATH ||
!S9xNPGetData (NetPlay.Socket, (uint8 *) Memory.ROMFilename, filename_len))
{
S9xNPSetError ("Error while receiving ROM filename from server.");
S9xNPDisconnect ();
Settings.StopEmulation = TRUE;
return (FALSE);
}
Memory.InitROM (FALSE);
S9xReset ();
S9xNPResetJoypadReadPos ();
Settings.StopEmulation = FALSE;
#ifdef __WIN32__
PostMessage (GUI.hWnd, WM_NULL, 0, 0);
#endif
return (TRUE);
}
void S9xNPGetSRAMData (uint32 len)
{
if (len > 0x10000)
{
S9xNPSetError ("Length error in S-RAM data received from server.");
S9xNPDisconnect ();
return;
}
S9xNPSetAction ("Receiving S-RAM data...");
if (len > 0 && !S9xNPGetData (NetPlay.Socket, ::SRAM, len))
{
S9xNPSetError ("Error while receiving S-RAM data from server.");
S9xNPDisconnect ();
}
}
void S9xNPGetFreezeFile (uint32 len)
{
uint8 frame_count [4];
#ifdef NP_DEBUG
printf ("CLIENT: Receiving freeze file information @%ld...\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Receiving freeze file information...");
if (!S9xNPGetData (NetPlay.Socket, frame_count, 4))
{
S9xNPSetError ("Error while receiving freeze file information from server.");
S9xNPDisconnect ();
return;
}
NetPlay.FrameCount = READ_LONG (frame_count);
#ifdef NP_DEBUG
printf ("CLIENT: Receiving freeze file @%ld...\n", S9xGetMilliTime () - START);
#endif
S9xNPSetAction ("Receiving freeze file...");
uint8 *data = new uint8 [len];
if (!S9xNPGetData (NetPlay.Socket, data, len - 4))
{
S9xNPSetError ("Error while receiving freeze file from server.");
S9xNPDisconnect ();
delete data;
return;
}
//FIXME: Setting umask here wouldn't hurt.
FILE *file;
#ifdef HAVE_MKSTEMP
int fd;
char fname[] = "/tmp/snes9x_fztmpXXXXXX";
if ((fd = mkstemp(fname)) < 0)
{
if ((file = fdopen (fd, "wb")))
#else
char fname [L_tmpnam];
if (tmpnam (fname))
{
if ((file = fopen (fname, "wb")))
#endif
{
if (fwrite (data, 1, len, file) == len)
{
fclose(file);
if (!S9xUnfreezeGame (fname))
S9xNPSetError ("Unable to load freeze file just received.");
} else {
S9xNPSetError ("Failed to write to temporary freeze file.");
fclose (file);
}
} else
S9xNPSetError ("Failed to create temporary freeze file.");
remove (fname);
} else
S9xNPSetError ("Unable to get name for temporary freeze file.");
delete data;
}
uint32 S9xNPGetJoypad (int which1)
{
if (Settings.NetPlay && which1 < 5)
return (NetPlay.Joypads [NetPlay.JoypadReadInd][which1]);
return (0);
}
void S9xNPStepJoypadHistory ()
{
if ((NetPlay.JoypadReadInd + 1) % NP_JOYPAD_HIST_SIZE != NetPlay.JoypadWriteInd)
{
NetPlay.JoypadReadInd = (NetPlay.JoypadReadInd + 1) % NP_JOYPAD_HIST_SIZE;
if (NetPlay.FrameCount != NetPlay.Frame [NetPlay.JoypadReadInd])
{
S9xNPSetWarning ("This Snes9X session may be out of sync with the server.");
#ifdef NP_DEBUG
printf ("*** CLIENT: client out of sync with server (%d, %d) @%ld\n", NetPlay.FrameCount, NetPlay.Frame [NetPlay.JoypadReadInd], S9xGetMilliTime () - START);
#endif
}
}
else
{
#ifdef NP_DEBUG
printf ("*** CLIENT: S9xNPStepJoypadHistory NOT OK@%ld\n", S9xGetMilliTime () - START);
#endif
}
}
void S9xNPResetJoypadReadPos ()
{
#ifdef NP_DEBUG
printf ("CLIENT: ResetJoyReadPos @%ld\n", S9xGetMilliTime () - START); fflush (stdout);
#endif
NetPlay.JoypadWriteInd = 0;
NetPlay.JoypadReadInd = NP_JOYPAD_HIST_SIZE - 1;
for (int h = 0; h < NP_JOYPAD_HIST_SIZE; h++)
memset ((void *) &NetPlay.Joypads [h], 0, sizeof (NetPlay.Joypads [0]));
}
bool8 S9xNPSendJoypadUpdate (uint32 joypad)
{
uint8 data [7];
uint8 *ptr = data;
*ptr++ = NP_CLNT_MAGIC;
*ptr++ = NetPlay.MySequenceNum++;
*ptr++ = NP_CLNT_JOYPAD;
joypad |= 0x80000000;
WRITE_LONG (ptr, joypad);
if (!S9xNPSendData (NetPlay.Socket, data, 7))
{
S9xNPSetError ("Error while sending joypad data server.");
S9xNPDisconnect ();
return (FALSE);
}
return (TRUE);
}
void S9xNPDisconnect ()
{
close (NetPlay.Socket);
NetPlay.Socket = -1;
NetPlay.Connected = FALSE;
Settings.NetPlay = FALSE;
}
bool8 S9xNPSendData (int socket, const uint8 *data, int length)
{
int len = length;
const uint8 *ptr = data;
NetPlay.PercentageComplete = 0;
do
{
if (NetPlay.Abort)
return (FALSE);
int num_bytes = len;
// Write the data in small chunks, allowing this thread to spot an
// abort request from another thread.
if (num_bytes > 512)
num_bytes = 512;
int sent = write (socket, (char *) ptr, num_bytes);
if (sent < 0)
{
if (errno == EINTR
#ifdef EAGAIN
|| errno == EAGAIN
#endif
#ifdef EWOULDBLOCK
|| errno == EWOULDBLOCK
#endif
)
{
#ifdef NP_DEBUG
printf ("CLIENT: EINTR, EAGAIN or EWOULDBLOCK while sending data @%ld\n", S9xGetMilliTime () - START);
#endif
continue;
}
return (FALSE);
}
else
if (sent == 0)
return (FALSE);
len -= sent;
ptr += sent;
NetPlay.PercentageComplete = (uint8) (((length - len) * 100) / length);
} while (len > 0);
return (TRUE);
}
bool8 S9xNPGetData (int socket, uint8 *data, int length)
{
int len = length;
uint8 *ptr = data;
int chunk = length / 50;
if (chunk < 1024)
chunk = 1024;
NetPlay.PercentageComplete = 0;
do
{
if (NetPlay.Abort)
return (FALSE);
int num_bytes = len;
// Read the data in small chunks, allowing this thread to spot an
// abort request from another thread.
if (num_bytes > chunk)
num_bytes = chunk;
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
)
{
#ifdef NP_DEBUG
printf ("CLIENT: EINTR, EAGAIN or EWOULDBLOCK while receiving data @%ld\n", S9xGetMilliTime () - START);
#endif
continue;
}
#ifdef WSAEMSGSIZE
if (errno != WSAEMSGSIZE)
return (FALSE);
else
{
got = num_bytes;
#ifdef NP_DEBUG
printf ("CLIENT: WSAEMSGSIZE, actual bytes %d while receiving data @%ld\n", got, S9xGetMilliTime () - START);
#endif
}
#else
return (FALSE);
#endif