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socket.h

00001 /*
00002  * General sockets class wrapper
00003  *
00004  * Copyright (C) 2001 Barnaby Gray <barnaby@beedesign.co.uk>
00005  *
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * This library is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with this library; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
00019  *
00020  */
00021 
00022 #ifndef SOCKET_H
00023 #define SOCKET_H
00024 
00025 #include <string>
00026 #include <exception>
00027 
00028 #include <errno.h>
00029 #include <netdb.h>
00030 #include <sys/types.h>
00031 #include <sys/socket.h>
00032 #include <netinet/in.h>
00033 #include <arpa/inet.h>
00034 #include <unistd.h>
00035 #include <stdlib.h>
00036 #include <stdio.h>
00037 #include <fcntl.h>
00038 
00039 using std::string;
00040 using std::exception;
00041 
00042 unsigned int StringtoIP(const string& ip);
00043 
00044 string IPtoString(unsigned int ip);
00045 
00046 class Buffer;
00047 
00048 class TCPSocket {
00049  public:
00050   enum State {
00051     NOT_CONNECTED,
00052     NONBLOCKING_CONNECT,
00053     CONNECTED
00054   };
00055   
00056  private:
00057   static const unsigned int max_receive_size = 4096;
00058   
00059   unsigned long gethostname(const char *hostname);
00060 
00061   int m_socketDescriptor;
00062   bool m_socketDescriptor_valid;
00063   struct sockaddr_in remoteAddr, localAddr;
00064   bool blocking;
00065   State m_state;
00066 
00067   void fcntlSetup();
00068 
00069  public:
00070   TCPSocket();
00071   ~TCPSocket();
00072 
00073   // used after a successful accept on TCPServer
00074   TCPSocket( int fd, struct sockaddr_in addr );
00075 
00076   void Connect();
00077   void FinishNonBlockingConnect();
00078   void Disconnect();
00079   
00080   int getSocketHandle();
00081 
00082   void Send(Buffer& b);
00083 
00084   bool Recv(Buffer& b);
00085 
00086   bool connected();
00087 
00088   void setRemoteHost(const char *host);
00089   void setRemotePort(unsigned short port);
00090   void setRemoteIP(unsigned int ip);
00091   
00092   void setBlocking(bool b);
00093   bool isBlocking() const;
00094 
00095   State getState() const;
00096 
00097   unsigned int getRemoteIP() const;
00098   unsigned short getRemotePort() const;
00099 
00100   unsigned int getLocalIP() const;
00101   unsigned short getLocalPort() const;
00102 
00103 };
00104 
00105 class TCPServer {
00106  private:
00107   int m_socketDescriptor;
00108   bool m_socketDescriptor_valid;
00109   struct sockaddr_in localAddr;
00110 
00111  public:
00112   TCPServer();
00113   ~TCPServer();
00114 
00115   int getSocketHandle();
00116   
00117   void StartServer();
00118   void StartServer(unsigned short lower, unsigned short upper);
00119   void Disconnect();
00120 
00121   bool isStarted() const;
00122 
00123   // blocking accept
00124   TCPSocket* Accept();
00125   
00126   unsigned short getPort() const;
00127   unsigned int getIP() const;
00128 
00129 };
00130 
00131 class SocketException : exception {
00132  private:
00133   string m_errortext;
00134 
00135  public:
00136   SocketException(const string& text);
00137   ~SocketException() throw() { }
00138 
00139   const char* what() const throw();
00140 };
00141 
00142 #endif

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