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/*
Copyright 2016-2017 StapleButter
This file is part of melonDS.
melonDS 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 3 of the License, or (at your option)
any later version.
melonDS 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 melonDS. If not, see http://www.gnu.org/licenses/.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <SDL2/SDL.h>
#include "../Platform.h"
#include "../Config.h"
#ifdef __WIN32__
#include <winsock2.h>
#include <ws2tcpip.h>
#define socket_t SOCKET
#define sockaddr_t SOCKADDR
#define pcap_dev_name description
#else
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#define socket_t int
#define sockaddr_t struct sockaddr
#define closesocket close
#define pcap_dev_name name
#endif
#ifndef INVALID_SOCKET
#define INVALID_SOCKET (socket_t)-1
#endif
void Stop();
namespace Platform
{
typedef struct
{
SDL_Thread* ID;
void (*Func)();
} ThreadData;
int ThreadEntry(void* data)
{
ThreadData* thread = (ThreadData*)data;
thread->Func();
return 0;
}
socket_t MPSocket;
sockaddr_t MPSendAddr;
u8 PacketBuffer[2048];
#define NIFI_VER 1
void StopEmu()
{
Stop();
}
void* Thread_Create(void (*func)())
{
ThreadData* data = new ThreadData;
data->Func = func;
data->ID = SDL_CreateThread(ThreadEntry, "melonDS core thread", data);
return data;
}
void Thread_Free(void* thread)
{
delete (ThreadData*)thread;
}
void Thread_Wait(void* thread)
{
SDL_WaitThread((SDL_Thread*)((ThreadData*)thread)->ID, NULL);
}
void* Semaphore_Create()
{
return SDL_CreateSemaphore(0);
}
void Semaphore_Free(void* sema)
{
SDL_DestroySemaphore((SDL_sem*)sema);
}
void Semaphore_Reset(void* sema)
{
while (SDL_SemTryWait((SDL_sem*)sema) == 0);
}
void Semaphore_Wait(void* sema)
{
SDL_SemWait((SDL_sem*)sema);
}
void Semaphore_Post(void* sema)
{
SDL_SemPost((SDL_sem*)sema);
}
bool MP_Init()
{
int opt_true = 1;
int res;
#ifdef __WIN32__
WSADATA wsadata;
if (WSAStartup(MAKEWORD(2, 2), &wsadata) != 0)
{
return false;
}
#endif // __WXMSW__
MPSocket = socket(AF_INET, SOCK_DGRAM, 0);
if (MPSocket < 0)
{
return false;
}
res = setsockopt(MPSocket, SOL_SOCKET, SO_REUSEADDR, (const char*)&opt_true, sizeof(int));
if (res < 0)
{
closesocket(MPSocket);
MPSocket = INVALID_SOCKET;
return false;
}
sockaddr_t saddr;
saddr.sa_family = AF_INET;
*(u32*)&saddr.sa_data[2] = htonl(Config::SocketBindAnyAddr ? INADDR_ANY : INADDR_LOOPBACK);
*(u16*)&saddr.sa_data[0] = htons(7064);
res = bind(MPSocket, &saddr, sizeof(sockaddr_t));
if (res < 0)
{
closesocket(MPSocket);
MPSocket = INVALID_SOCKET;
return false;
}
res = setsockopt(MPSocket, SOL_SOCKET, SO_BROADCAST, (const char*)&opt_true, sizeof(int));
if (res < 0)
{
closesocket(MPSocket);
MPSocket = INVALID_SOCKET;
return false;
}
MPSendAddr.sa_family = AF_INET;
*(u32*)&MPSendAddr.sa_data[2] = htonl(INADDR_BROADCAST);
*(u16*)&MPSendAddr.sa_data[0] = htons(7064);
return true;
}
void MP_DeInit()
{
if (MPSocket >= 0)
closesocket(MPSocket);
#ifdef __WIN32__
WSACleanup();
#endif // __WXMSW__
}
int MP_SendPacket(u8* data, int len)
{
if (MPSocket < 0)
return 0;
if (len > 2048-8)
{
printf("MP_SendPacket: error: packet too long (%d)\n", len);
return 0;
}
*(u32*)&PacketBuffer[0] = htonl(0x4946494E); // NIFI
PacketBuffer[4] = NIFI_VER;
PacketBuffer[5] = 0;
*(u16*)&PacketBuffer[6] = htons(len);
memcpy(&PacketBuffer[8], data, len);
int slen = sendto(MPSocket, (const char*)PacketBuffer, len+8, 0, &MPSendAddr, sizeof(sockaddr_t));
if (slen < 8) return 0;
return slen - 8;
}
int MP_RecvPacket(u8* data, bool block)
{
if (MPSocket < 0)
return 0;
fd_set fd;
struct timeval tv;
FD_ZERO(&fd);
FD_SET(MPSocket, &fd);
tv.tv_sec = 0;
tv.tv_usec = block ? 5000 : 0;
if (!select(MPSocket+1, &fd, 0, 0, &tv))
{
return 0;
}
sockaddr_t fromAddr;
socklen_t fromLen = sizeof(sockaddr_t);
int rlen = recvfrom(MPSocket, (char*)PacketBuffer, 2048, 0, &fromAddr, &fromLen);
if (rlen < 8+24)
{
return 0;
}
rlen -= 8;
if (ntohl(*(u32*)&PacketBuffer[0]) != 0x4946494E)
{
return 0;
}
if (PacketBuffer[4] != NIFI_VER)
{
return 0;
}
if (ntohs(*(u16*)&PacketBuffer[6]) != rlen)
{
return 0;
}
memcpy(data, &PacketBuffer[8], rlen);
return rlen;
}
}
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