unix/SysCSStream.hpp

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/*----------------------------------------------------------------------------*/
 
 
#ifndef SysCSStream_Included
#define SysCSStream_Included
 
#include <netinet/in.h>
 
 
// Client Server error codes
typedef enum
{
    CSERROR_OK = 0,
    CSERROR_CONNX_EXISTS,
    CSERROR_CONNX_FAILED,
    CSERROR_IO_FAILED,
    CSERROR_OPEN_FAILED,
    CSERROR_HOSTNAME_PORT,
    CSERROR_INTERNAL,
    CSERROR_UNKNOWN
} CSErrorCodeT;
 
class SysSocketConnection
{
public:
    inline SysSocketConnection() : c(-1), errcode(CSERROR_OK), messageBuffer(NULL) { }
    inline SysSocketConnection(int sock) : c(sock), errcode(CSERROR_OK), messageBuffer(NULL) { }
    inline ~SysSocketConnection() { if (messageBuffer != NULL) { free(messageBuffer); } }
    CSErrorCodeT getError(void)
    {
        return errcode;
    };
    bool read(void *buf, size_t bufsize, size_t *bytesread);
    bool write(void *buf, size_t bufsize, size_t *byteswritten);
    bool write(void *buf, size_t bufsize, void*buf2, size_t buf2size, size_t *byteswritten);
 
protected:
    enum
    {
        // somewhat arbitrary.  Should be large enough for "normal requests"
        MAX_CACHED_BUFFER = 4096
    };
 
    char *getMessageBuffer(size_t size);
    void returnMessageBuffer(void *);
 
    int c; // stream socket
    CSErrorCodeT errcode;  // error status
    char *messageBuffer;   // a buffer for message sending
};
 
 
// This is the Client TCP/IP Stream class
class SysClientStream : public SysSocketConnection
{
public:
    SysClientStream();
    SysClientStream(const char *name);
    SysClientStream(const char *host, int port);
    ~SysClientStream();
    CSErrorCodeT getError(void)
    {
        return errcode;
    };
    bool open(const char *);
    bool open(const char *, int);
    bool close();
    // the following APIs are usually not used but are here for completeness
    // they should be called prior to calling the Open method
    void setDomain(int newdomain)
    {
        domain = newdomain;
    };
    void setType(int newtype)
    {
        type = newtype;
    };
    void setProtocol(int newprotocol)
    {
        protocol = newprotocol;
    };
    inline bool isClean()
    {
        return errcode == CSERROR_OK;
    }
 
protected:
    int domain; // the socket domain
    int type; // the socket type
    int protocol; // the socket protocol
};
 
class SysServerStream;
 
/**
 * Class to manage a single instance of a server connection.
 * These are created any time a server stream object accepts
 * a connection.
 */
class SysServerConnection : public SysSocketConnection
{
public:
    SysServerConnection(SysServerStream *s, int socket);
    ~SysServerConnection();
 
    bool isLocalConnection();
    bool disconnect(void);
 
protected:
    SysServerStream *server;
};
 
// This is the Server TCP/IP Stream class
class SysServerStream
{
protected:
    CSErrorCodeT errcode;
    int s;      // server socket
    int domain; // the socket domain
    int type; // the socket type
    int protocol; // the socket protocol
    int backlog; // backlog for connecting clients
 
public:
    SysServerStream();
    SysServerStream(const char *name);
    SysServerStream(int port);
    ~SysServerStream();
    CSErrorCodeT getError(void)
    {
        return errcode;
    };
    bool make(const char *);
    bool make(int);
    SysServerConnection *connect();
    bool close();
    // the following APIs are usually not used but are here for completeness
    // they should be called prior to calling the Make method
    inline void setDomain(int newdomain)
    {
        domain = newdomain;
    };
    inline void setType(int newtype)
    {
        type = newtype;
    };
    inline void setProtocol(int newprotocol)
    {
        protocol = newprotocol;
    };
    inline void setBackLog(int newbacklog)
    {
        backlog = newbacklog;
    };
    inline bool isClean()
    {
        return errcode == CSERROR_OK;
    }
};
#endif