frodo-wii/Src/Network.h
2009-11-01 08:38:13 +00:00

384 lines
8.0 KiB
C++

#ifndef NETWORK_H
#define NETWORK_H
#if defined(GEKKO)
# include <network.h>
#else
#include <arpa/inet.h>
#endif
#include <SDL.h>
#include "SID.h"
#include "Display.h"
#define FRODO_NETWORK_PROTOCOL_VERSION 4
#define FRODO_NETWORK_MAGIC 0x1976
#define NETWORK_UPDATE_SIZE (256 * 1024)
#define NETWORK_SOUND_BUF_SIZE 4096
#define SCREENSHOT_FACTOR 4
#define SCREENSHOT_X (DISPLAY_X / SCREENSHOT_FACTOR)
#define SCREENSHOT_Y (DISPLAY_Y / SCREENSHOT_FACTOR)
typedef enum
{
/* Connection-related messages */
CONNECT_TO_BROKER = 99, /* Hello, broker */
LIST_PEERS = 98, /* List of peers */
CONNECT_TO_PEER = 97, /* A peer wants to connect */
DISCONNECT = 96, /* Disconnect from a peer */
SELECT_PEER = 93, /* (client) Select who to connect to */
PING = 95, /* (broker) are you alive? */
ACK = 94, /* Answer to broker */
/* Non-data messages */
STOP = 55, /* End of this update sequence */
/* Data transfer of various kinds */
DISPLAY_UPDATE_RAW = 1,
DISPLAY_UPDATE_RLE = 2,
DISPLAY_UPDATE_DIFF= 3,
SOUND_UPDATE_RAW = 4,
SOUND_UPDATE_RLE = 5,
KEYBOARD_UPDATE = 6,
JOYSTICK_UPDATE = 7,
ENTER_MENU = 8,
TEXT_MESSAGE = 9,
} network_message_type_t;
typedef enum
{
CONN_CONNECTED,
CONN_CONNECT_TO_BROKER,
CONN_WAIT_FOR_PEER_ADDRESS,
CONN_CONNECT_TO_PEER,
CONN_SELECT_PEER,
CONN_WAIT_FOR_PEER_REPLY,
/* Client-only */
CONN_WAIT_FOR_PEER_LIST,
FAILED,
} network_connection_state_t;
typedef enum
{
OK = 0,
AGAIN_ERROR,
VERSION_ERROR,
SERVER_GARBAGE_ERROR,
NO_PEERS_ERROR,
} network_connection_error_t;
struct NetworkUpdate
{
uint16 magic; /* Should be 0x1976 */
uint16 type; /* See above */
uint32 size;
/* The rest is just data of some type */
uint8 data[];
};
struct NetworkUpdateDisplay
{
uint8 square;
uint8 data[];
};
struct NetworkUpdateJoystick
{
uint8 val;
};
struct NetworkUpdateSelectPeer
{
uint32 server_id;
};
struct NetworkUpdatePingAck
{
uint32 seq;
};
/*
* Sent by the third-party broker server when someone wants to connect
* to this machine.
*
* See http://www.brynosaurus.com/pub/net/p2pnat/ for how the UDP hole
* punching actually works.
*/
struct NetworkUpdatePeerInfo
{
uint16 private_port;
uint16 public_port;
/* Encoded as hex numbers in a string - c0a80a02\0 -> 192.168.10.2.
* Some more space to fit IPv6 stuff */
uint8 private_ip[16];
uint8 public_ip[16];
uint16 key; /* Random value to separate same names */
uint16 is_master;
uint8 name[32]; /* "SIMON", "LINDA" etc */
uint32 server_id; /* Used by the server */
uint32 version; /* Version number */
uint32 avatar; /* Hash of the avatar */
/* RAW-encoded screenshot of how the display looks like */
uint8 screenshot[(SCREENSHOT_X * SCREENSHOT_Y) / 2];
};
struct NetworkUpdateListPeers
{
uint32 n_peers;
uint8 your_ip[16];
uint16 your_port;
uint8 d[2]; /* Pad to 4 bytes */
/* Followed by the actual peers */
NetworkUpdatePeerInfo peers[];
};
static inline NetworkUpdate *InitNetworkUpdate(NetworkUpdate *ud, uint16 type, uint32 size)
{
ud->magic = FRODO_NETWORK_MAGIC;
ud->size = size;
ud->type = type;
return ud;
}
class Network
{
public:
Network(const char *remote_host, int port);
~Network();
void EncodeSound();
void EncodeScreenshot(Uint8 *dst, Uint8 *master);
void EncodeDisplay(Uint8 *master, Uint8 *remote);
void EncodeJoystickUpdate(Uint8 v);
void EncodeTextMessage(char *str);
bool DecodeUpdate(C64Display *display, uint8 *js, MOS6581 *dst);
void ResetNetworkUpdate(void);
void DrawTransferredBlocks(SDL_Surface *screen);
size_t GetKbps() {
return this->kbps;
}
bool ThrottleTraffic() {
return this->kbps > this->target_kbps;
}
void ResetBytesSent() {
this->traffic = 0;
}
void Tick(int ms);
void CloseSocket();
bool SendUpdate();
bool ReceiveUpdate();
bool ReceiveUpdate(struct timeval *tv);
static bool StartNetworkServer(int port);
static bool CheckNewConnection();
Uint8 *GetScreen()
{
return this->screen;
}
bool Connect();
network_connection_error_t ConnectFSM();
/**
* Disconnect from the other end. You should delete the object
* after having done this.
*/
void Disconnect();
static void PushSound(uint8 vol);
static bool is_master; /* Some peers are more equal than others */
protected:
void InitNetwork();
void ShutdownNetwork();
size_t DecodeSoundRLE(struct NetworkUpdate *src, MOS6581 *dst);
size_t DecodeSoundUpdate(struct NetworkUpdate *src, MOS6581 *dst);
size_t EncodeSoundRLE(struct NetworkUpdate *dst,
Uint8 *buffer, size_t len);
size_t EncodeSoundRaw(struct NetworkUpdate *dst,
Uint8 *buffer, size_t len);
size_t GetSoundBufferSize();
/** Encode part of a screen into @a dst in a single sweep
*
* @param dst the destination update structure
* @param screen the screen to encode
* @param remote the current remote screen
* @param square the square index of the screen to encode
*
* @return the size of the encoded message
*/
size_t EncodeDisplaySquare(struct NetworkUpdate *dst,
Uint8 *screen, Uint8 *remote, int square,
bool use_diff = true);
/**
* Encode the @a buf sound buffer into @a dst
*
* @param dst the destination update structure
* @param buf the buffer to encode
* @param len the length of the in-buffer
*
* @return the size of the encoded message
*/
size_t EncodeSoundBuffer(struct NetworkUpdate *dst,
Uint8 *buf, size_t len);
/**
* Decode a display update message onto @a screen
*
* @param src the message to decode
*/
bool DecodeDisplayUpdate(struct NetworkUpdate *src);
void AddNetworkUpdate(struct NetworkUpdate *update);
size_t GetNetworkUpdateSize(void)
{
return (Uint8*)this->cur_ud - (Uint8*)this->ud;
}
/**
* Compare two display squares.
*
* @param a the first square (first byte)
* @param b the second square (first byte)
*
* @return true if they are equal
*/
bool CompareSquare(Uint8 *a, Uint8 *b);
bool DecodeDisplayDiff(struct NetworkUpdate *src,
int x, int y);
bool DecodeDisplayRLE(struct NetworkUpdate *src,
int x, int y);
bool DecodeDisplayRaw(struct NetworkUpdate *src,
int x, int y);
void SendPingAck(int seq);
bool ReceiveUpdate(NetworkUpdate *dst, size_t sz, struct timeval *tv);
bool ReceiveData(void *dst, int sock, size_t sz);
bool InitSocket(const char *remote_host, int port);
/* Simple wrapper around our friend recvfrom */
ssize_t ReceiveFrom(void *dst, int sock, size_t sz,
struct sockaddr_in *from);
ssize_t SendTo(void *src, int sock, size_t sz,
struct sockaddr_in *to);
bool SendData(void *src, int sock, size_t sz);
virtual bool Select(int sock, struct timeval *tv);
bool IpToStr(char *dst, uint8 *ip);
bool InitSockaddr (struct sockaddr_in *name,
const char *hostname, uint16_t port);
bool MarshalData(NetworkUpdate *ud);
bool MarshalAllData(NetworkUpdate *p);
bool DeMarshalAllData(NetworkUpdate *ud, size_t max_size,
bool *has_stop);
bool DeMarshalData(NetworkUpdate *ud);
bool ConnectToBroker();
bool ConnectToPeer();
bool WaitForPeerReply();
network_connection_error_t WaitForPeerList();
network_connection_error_t WaitForPeerAddress();
bool SelectPeer(uint32 id);
size_t FillNetworkBuffer(NetworkUpdate *p);
NetworkUpdate *GetNext(NetworkUpdate *p)
{
return (NetworkUpdate*)((Uint8*)p + p->size);
}
NetworkUpdate *ud;
NetworkUpdate *cur_ud;
Uint8 *raw_buf;
Uint8 *rle_buf;
Uint8 *diff_buf;
Uint8 *sound_buf;
Uint8 screenshot[SCREENSHOT_X * SCREENSHOT_Y / 2];
Uint32 *square_updated;
size_t traffic, last_traffic;
int time_since_last_reset;
int target_kbps;
int kbps;
/* The current square to refresh */
int refresh_square;
Uint8 *screen;
int joystick_port;
bool connected;
Uint8 cur_joystick_data;
/* Connection to the peer */
int sock;
struct sockaddr_in connection_addr;
const char *connection_error_message;
network_connection_state_t network_connection_state;
/* Sound */
static uint8 sample_buf[NETWORK_SOUND_BUF_SIZE];
static int sample_head;
static int sample_tail;
public:
static bool networking_started;
};
#endif /* NETWORK_H */