mirror of
https://github.com/Oibaf66/frodo-wii.git
synced 2024-11-10 21:55:11 +01:00
360 lines
7.5 KiB
C++
360 lines
7.5 KiB
C++
#ifndef NETWORK_H
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#define NETWORK_H
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#if defined(GEKKO)
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# include <network.h>
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#else
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#include <arpa/inet.h>
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#endif
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#include <SDL.h>
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#define FRODO_NETWORK_PROTOCOL_VERSION 2
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#define FRODO_NETWORK_MAGIC 0x1976
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#define NETWORK_UPDATE_SIZE (256 * 1024)
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#define NETWORK_SOUND_BUF_SIZE 1024
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typedef enum
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{
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/* Connection-related messages */
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CONNECT_TO_BROKER = 99, /* Hello, broker */
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LIST_PEERS = 98, /* List of peers */
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CONNECT_TO_PEER = 97, /* A peer wants to connect */
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DISCONNECT = 96, /* Disconnect from a peer */
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SELECT_PEER = 93, /* (client) Select who to connect to */
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PING = 95, /* (broker) are you alive? */
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ACK = 94, /* Answer to broker */
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/* Non-data messages */
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STOP = 55, /* End of this update sequence */
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/* Data transfer of various kinds */
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DISPLAY_UPDATE_RAW = 1,
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DISPLAY_UPDATE_RLE = 2,
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DISPLAY_UPDATE_DIFF= 3,
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SOUND_UPDATE_RAW = 4,
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SOUND_UPDATE_RLE = 5,
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KEYBOARD_UPDATE = 6,
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JOYSTICK_UPDATE = 7,
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ENTER_MENU = 8,
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} network_message_type_t;
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typedef enum
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{
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CONN_CONNECTED,
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CONN_CONNECT_TO_BROKER,
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CONN_WAIT_FOR_PEER_ADDRESS,
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CONN_CONNECT_TO_PEER,
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CONN_SELECT_PEER,
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CONN_WAIT_FOR_PEER_REPLY,
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/* Client-only */
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CONN_WAIT_FOR_PEER_LIST,
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FAILED,
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} network_connection_state_t;
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typedef enum
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{
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OK = 0,
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AGAIN_ERROR,
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VERSION_ERROR,
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SERVER_GARBAGE_ERROR,
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} network_connection_error_t;
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struct NetworkUpdate
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{
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uint16 magic; /* Should be 0x1976 */
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uint16 type; /* See above */
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uint32 size;
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/* The rest is just data of some type */
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uint8 data[];
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};
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struct NetworkUpdateDisplay
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{
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uint8 square;
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uint8 data[];
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};
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struct NetworkUpdateJoystick
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{
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uint8 val;
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};
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struct NetworkUpdateSelectPeer
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{
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uint32 server_id;
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};
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struct NetworkUpdatePingAck
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{
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uint32 seq;
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};
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/*
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* Sent by the third-party broker server when someone wants to connect
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* to this machine.
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*
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* See http://www.brynosaurus.com/pub/net/p2pnat/ for how the UDP hole
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* punching actually works.
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*/
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struct NetworkUpdatePeerInfo
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{
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uint16 private_port;
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uint16 public_port;
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/* Encoded as hex numbers in a string - c0a80a02\0 -> 192.168.10.2.
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* Some more space to fit IPv6 stuff */
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uint8 private_ip[16];
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uint8 public_ip[16];
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uint16 key; /* Random value to separate same names */
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uint16 is_master;
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uint8 name[32]; /* "SIMON", "LINDA" etc */
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uint32 server_id; /* Used by the server */
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uint32 version; /* Version number */
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};
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struct NetworkUpdateListPeers
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{
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uint32 n_peers;
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uint8 your_ip[16];
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uint16 your_port;
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uint8 d[2]; /* Pad to 4 bytes */
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/* Followed by the actual peers */
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NetworkUpdatePeerInfo peers[];
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};
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static inline NetworkUpdate *InitNetworkUpdate(NetworkUpdate *ud, uint16 type, uint32 size)
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{
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ud->magic = FRODO_NETWORK_MAGIC;
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ud->size = size;
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ud->type = type;
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return ud;
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}
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class Network
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{
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public:
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Network(const char *remote_host, int port, bool is_master);
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~Network();
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void EncodeSound();
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void EncodeDisplay(Uint8 *master, Uint8 *remote);
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void EncodeJoystickUpdate(Uint8 v);
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bool DecodeUpdate(uint8 *screen, uint8 *js);
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void ResetNetworkUpdate(void);
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void DrawTransferredBlocks(SDL_Surface *screen);
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size_t GetKbps() {
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return this->kbps;
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}
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bool ThrottleTraffic() {
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return this->kbps > this->target_kbps;
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}
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void ResetBytesSent() {
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this->traffic = 0;
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}
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void Tick(int ms);
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void CloseSocket();
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bool SendUpdate();
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bool ReceiveUpdate();
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bool ReceiveUpdate(struct timeval *tv);
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static bool StartNetworkServer(int port);
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static bool CheckNewConnection();
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Uint8 *GetScreen()
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{
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return this->screen;
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}
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bool Connect();
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network_connection_error_t ConnectFSM();
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/**
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* Disconnect from the other end. You should delete the object
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* after having done this.
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*/
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void Disconnect();
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static void PushSound(uint8 vol);
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protected:
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void InitNetwork();
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void ShutdownNetwork();
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size_t DecodeSoundUpdate(struct NetworkUpdate *src, char *buf);
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size_t EncodeSoundRLE(struct NetworkUpdate *dst,
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Uint8 *buffer, size_t len);
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size_t EncodeSoundRaw(struct NetworkUpdate *dst,
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Uint8 *buffer, size_t len);
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/** Encode part of a screen into @a dst in a single sweep
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*
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* @param dst the destination update structure
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* @param screen the screen to encode
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* @param remote the current remote screen
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* @param square the square index of the screen to encode
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*
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* @return the size of the encoded message
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*/
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size_t EncodeDisplaySquare(struct NetworkUpdate *dst,
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Uint8 *screen, Uint8 *remote, int square,
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bool use_diff = true);
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/**
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* Encode the @a buf sound buffer into @a dst
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*
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* @param dst the destination update structure
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* @param buf the buffer to encode
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* @param len the length of the in-buffer
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*
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* @return the size of the encoded message
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*/
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size_t EncodeSoundBuffer(struct NetworkUpdate *dst,
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Uint8 *buf, size_t len);
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/**
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* Decode a display update message onto @a screen
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*
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* @param screen the screen to draw to
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* @param src the message to decode
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*/
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bool DecodeDisplayUpdate(Uint8 *screen, struct NetworkUpdate *src);
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void AddNetworkUpdate(struct NetworkUpdate *update);
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size_t GetNetworkUpdateSize(void)
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{
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return (Uint8*)this->cur_ud - (Uint8*)this->ud;
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}
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/**
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* Compare two display squares.
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*
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* @param a the first square (first byte)
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* @param b the second square (first byte)
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*
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* @return true if they are equal
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*/
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bool CompareSquare(Uint8 *a, Uint8 *b);
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bool DecodeDisplayDiff(Uint8 *screen, struct NetworkUpdate *src,
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int x, int y);
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bool DecodeDisplayRLE(Uint8 *screen, struct NetworkUpdate *src,
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int x, int y);
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bool DecodeDisplayRaw(Uint8 *screen, struct NetworkUpdate *src,
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int x, int y);
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void SendPingAck(int seq);
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bool ReceiveUpdate(NetworkUpdate *dst, size_t sz, struct timeval *tv);
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bool ReceiveData(void *dst, int sock, size_t sz);
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bool InitSocket(const char *remote_host, int port);
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/* Simple wrapper around our friend recvfrom */
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ssize_t ReceiveFrom(void *dst, int sock, size_t sz,
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struct sockaddr_in *from);
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ssize_t SendTo(void *src, int sock, size_t sz,
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struct sockaddr_in *to);
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bool SendData(void *src, int sock, size_t sz);
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virtual bool Select(int sock, struct timeval *tv);
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bool IpToStr(char *dst, uint8 *ip);
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bool InitSockaddr (struct sockaddr_in *name,
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const char *hostname, uint16_t port);
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bool MarshalData(NetworkUpdate *ud);
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bool MarshalAllData(NetworkUpdate *p);
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bool DeMarshalAllData(NetworkUpdate *ud, size_t max_size,
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bool *has_stop);
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bool DeMarshalData(NetworkUpdate *ud);
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bool ConnectToBroker();
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bool ConnectToPeer();
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bool WaitForPeerReply();
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network_connection_error_t WaitForPeerList();
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network_connection_error_t WaitForPeerAddress();
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bool SelectPeer(uint32 id);
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size_t FillNetworkBuffer(NetworkUpdate *p);
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NetworkUpdate *GetNext(NetworkUpdate *p)
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{
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return (NetworkUpdate*)((Uint8*)p + p->size);
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}
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NetworkUpdate *ud;
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NetworkUpdate *tmp_ud;
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NetworkUpdate *cur_ud;
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Uint8 *raw_buf;
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Uint8 *rle_buf;
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Uint8 *diff_buf;
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Uint8 *sound_buf;
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Uint32 *square_updated;
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size_t traffic, last_traffic;
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int time_since_last_reset;
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int target_kbps;
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int kbps;
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/* The current square to refresh */
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int refresh_square;
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Uint8 *screen;
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int joystick_port;
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bool is_master; /* Some peers are more equal than others */
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bool connected;
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Uint8 cur_joystick_data;
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/* Connection to the peer */
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int sock;
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struct sockaddr_in connection_addr;
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const char *connection_error_message;
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network_connection_state_t network_connection_state;
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/* Sound */
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static uint8 sample_buf[NETWORK_SOUND_BUF_SIZE];
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static int sample_head;
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static int sample_tail;
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};
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#endif /* NETWORK_H */
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