CWE-ou-minkata/Sources/Plasma/NucleusLib/pnAsyncCore/Private/pnAcIo.h

/*==LICENSE==*

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*==LICENSE==*/
/*****************************************************************************
*
*   $/Plasma20/Sources/Plasma/NucleusLib/pnAsyncCore/Private/pnAcIo.h
*   
***/

#ifdef PLASMA20_SOURCES_PLASMA_NUCLEUSLIB_PNASYNCCORE_PRIVATE_PNACIO_H
#error "Header $/Plasma20/Sources/Plasma/NucleusLib/pnAsyncCore/Private/pnAcIo.h included more than once"
#endif
#define PLASMA20_SOURCES_PLASMA_NUCLEUSLIB_PNASYNCCORE_PRIVATE_PNACIO_H

#include "pnNetCommon/plNetAddress.h"
#include "pnUUID/pnUUID.h"


/****************************************************************************
*
*   Global types and constants
*
***/

typedef struct AsyncIdStruct *         AsyncId;
typedef struct AsyncFileStruct *       AsyncFile;
typedef struct AsyncSocketStruct *     AsyncSocket;
typedef struct AsyncCancelIdStruct *   AsyncCancelId;

const unsigned kAsyncSocketBufferSize   = 1460;

/****************************************************************************
*
*   Socket connect packet
*
***/

#pragma pack(push,1)
struct AsyncSocketConnectPacket {
    uint8_t     connType;
    uint16_t    hdrBytes;
    uint32_t    buildId;
    uint32_t    buildType;
    uint32_t    branchId;
    plUUID      productId;
};
#pragma pack(pop)


/****************************************************************************
*
*   Socket event notifications
*
***/

enum EAsyncNotifySocket {
    kNotifySocketConnectFailed,
    kNotifySocketConnectSuccess,
    kNotifySocketDisconnect,
    kNotifySocketListenSuccess,
    kNotifySocketRead,
    kNotifySocketWrite
};

struct AsyncNotifySocket {
    void *          param;
    AsyncId         asyncId;

    AsyncNotifySocket() : param(nil), asyncId(nil) { }
};

struct AsyncNotifySocketConnect : AsyncNotifySocket {
    plNetAddress    localAddr;
    plNetAddress    remoteAddr;
    unsigned        connType;

    AsyncNotifySocketConnect() : connType(0) { }
};

struct AsyncNotifySocketListen : AsyncNotifySocketConnect {
    unsigned        buildId;
    unsigned        buildType;
    unsigned        branchId;
    plUUID          productId;
    plNetAddress    addr;
    uint8_t *       buffer;
    unsigned        bytes;
    unsigned        bytesProcessed;

    AsyncNotifySocketListen()
        : buildId(0), buildType(0), branchId(0), buffer(nil), bytes(0),
          bytesProcessed(0) { }
};

struct AsyncNotifySocketRead : AsyncNotifySocket {
    uint8_t *       buffer;
    unsigned        bytes;
    unsigned        bytesProcessed;

    AsyncNotifySocketRead() : buffer(nil), bytes(0), bytesProcessed(0) { }
};

typedef AsyncNotifySocketRead AsyncNotifySocketWrite;

typedef bool (* FAsyncNotifySocketProc) (    // return false to disconnect
    AsyncSocket         sock,
    EAsyncNotifySocket  code,
    AsyncNotifySocket * notify,
    void **             userState
);


/****************************************************************************
*
*   Connection type functions
*
***/

// These codes may not be changed unless ALL servers and clients are
// simultaneously replaced; so basically forget it =)
enum EConnType {
    kConnTypeNil                    = 0,
    
    // For test applications
    kConnTypeDebug                  = 1,

    // Binary connections
    kConnTypeCliToAuth              = 10,
    kConnTypeCliToGame              = 11,
    kConnTypeSrvToAgent             = 12,
    kConnTypeSrvToMcp               = 13,
    kConnTypeSrvToVault             = 14,
    kConnTypeSrvToDb                = 15,
    kConnTypeCliToFile              = 16,
    kConnTypeSrvToState             = 17,
    kConnTypeSrvToLog               = 18,
    kConnTypeSrvToScore             = 19,
    kConnTypeCliToCsr               = 20, // DEAD
    kConnTypeSimpleNet              = 21, // DEAD
    kConnTypeCliToGateKeeper        = 22,
    
    // Text connections
    kConnTypeAdminInterface         = 97,   // 'a'

    kNumConnTypes
};
static_assert(kNumConnTypes <= 0xFF, "EConnType overflows uint8");

#define IS_TEXT_CONNTYPE(c)     \
    (((int)(c)) == kConnTypeAdminInterface)


void AsyncSocketRegisterNotifyProc (
    uint8_t                 connType,
    FAsyncNotifySocketProc  notifyProc,
    unsigned                buildId = 0,
    unsigned                buildType = 0,
    unsigned                branchId = 0,
    const plUUID&           productId = kNilUuid
);

void AsyncSocketUnregisterNotifyProc (
    uint8_t                 connType,
    FAsyncNotifySocketProc  notifyProc,
    unsigned                buildId = 0,
    unsigned                buildType = 0,
    unsigned                branchId = 0,
    const plUUID&           productId = kNilUuid
);

FAsyncNotifySocketProc AsyncSocketFindNotifyProc (
    const uint8_t           buffer[],
    unsigned                bytes,
    unsigned *              bytesProcessed,
    unsigned *              connType,
    unsigned *              buildId,
    unsigned *              buildType,
    unsigned *              branchId,
    plUUID*                 productId
);


/****************************************************************************
*
*   Socket functions
*
***/

void AsyncSocketConnect (
    AsyncCancelId *         cancelId,
    const plNetAddress&     netAddr,
    FAsyncNotifySocketProc  notifyProc,
    void *                  param = nil,
    const void *            sendData = nil,
    unsigned                sendBytes = 0,
    unsigned                connectMs = 0,      // 0 => use default value
    unsigned                localPort = 0       // 0 => don't bind local port
);

// Due to the asynchronous nature of sockets, the connect may complete
// before the cancel does... you have been warned.
void AsyncSocketConnectCancel (
    FAsyncNotifySocketProc  notifyProc,
    AsyncCancelId           cancelId
);

void AsyncSocketDisconnect (
    AsyncSocket             sock,
    bool                    hardClose
);

// This function must only be called after receiving a kNotifySocketDisconnect
void AsyncSocketDelete (AsyncSocket sock);

// Returns false of socket has been closed
bool AsyncSocketSend (
    AsyncSocket             sock,
    const void *            data,
    unsigned                bytes
);

// Buffer must stay valid until I/O has completed
// Returns false if socket has been closed
bool AsyncSocketWrite (
    AsyncSocket             sock,
    const void *            buffer,
    unsigned                bytes,
    void *                  param
);

// This function must only be called from with a socket notification callback.
// Calling at any other time is a crash bug waiting to happen!
void AsyncSocketSetNotifyProc (
    AsyncSocket             sock,
    FAsyncNotifySocketProc  notifyProc
);

// A backlog of zero (the default) means that no buffering is performed when
// the TCP send buffer is full, and the send() function will close the socket
// on send fail
void AsyncSocketSetBacklogAlloc (
    AsyncSocket             sock,
    unsigned                bufferSize
);

// On failure, returns 0
// On success, returns bound port (if port number was zero, returns assigned port)
// For connections that will use kConnType* connections, set notifyProc = nil;
// the handler will be found when connection packet is received.
// for connections with hard-coded behavior, set the notifyProc here (e.g. for use
// protocols like SNMP on port 25)
unsigned AsyncSocketStartListening (
    const plNetAddress&     listenAddr,
    FAsyncNotifySocketProc  notifyProc = nil
);
void AsyncSocketStopListening (
    const plNetAddress&     listenAddr,
    FAsyncNotifySocketProc  notifyProc = nil
);

void AsyncSocketEnableNagling (
    AsyncSocket             sock,
    bool                    enable
);


/****************************************************************************
*
*   Dns functions
*
***/

typedef void (* FAsyncLookupProc) (
    void *              param,
    const char          name[],
    unsigned            addrCount,
    const plNetAddress  addrs[]
);

void AsyncAddressLookupName (
    AsyncCancelId *     cancelId,
    FAsyncLookupProc    lookupProc,
    const char          name[],
    unsigned            port,
    void *              param
);

void AsyncAddressLookupAddr (
    AsyncCancelId *     cancelId,
    FAsyncLookupProc    lookupProc,
    const plNetAddress& address,
    void *              param
);

void AsyncAddressLookupCancel (
    FAsyncLookupProc    lookupProc,
    AsyncCancelId       cancelId
);