developer.intra2net.com Git - libt2n/blob - src/socket_client.hxx

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Gerd v. Egidy                                   *
   3  *   gve@intra2net.com                                                     *
   4  *                                                                         *
   5  *   This library is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU Lesser General Public License version   *
   7  *   2.1 as published by the Free Software Foundation.                     *
   8  *                                                                         *
   9  *   This library is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU Lesser General Public License for more details.                   *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU Lesser General Public      *
  15  *   License along with this program; if not, write to the                 *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  18  ***************************************************************************/
  19 #ifndef __LIBT2N_SOCKET_CLIENT
  20 #define __LIBT2N_SOCKET_CLIENT
  21
  22 #include "client.hxx"
  23 #include "socket_handler.hxx"
  24
  25 struct sockaddr;
  26
  27 namespace libt2n
  28 {
  29 /** @brief a connection from client to server using sockets.
  30
  31     Use this class to connect from a client to a server.
  32  */
  33 class socket_client_connection : public client_connection, public socket_handler
  34 {
  35     public:
  36         static const int max_retries_default=3;
  37         static const long long connect_timeout_usec_default=30000000;
  38
  39     private:
  40         void real_write(const std::string& data)
  41             { socket_write(data); }
  42
  43         void tcp_connect(int max_retries);
  44         void unix_connect(int max_retries);
  45         void connect_with_timeout(struct sockaddr *sock_addr,unsigned int sockaddr_size);
  46
  47         int max_retries;
  48         long long connect_timeout_usec;
  49
  50         std::string path;
  51         std::string server;
  52         int port;
  53
  54         std::string lastErrorMsg;
  55
  56     protected:
  57
  58         std::ostream* get_logstream(log_level_values level)
  59             { return client_connection::get_logstream(level); }
  60
  61     public:
  62         socket_client_connection(int _port, const std::string& _server="127.0.0.1",
  63             long long _connect_timeout_usec=connect_timeout_usec_default,
  64             int _max_retries=max_retries_default,
  65             std::ostream *_logstream=NULL, log_level_values _log_level=none);
  66         socket_client_connection(const std::string& _path,
  67             long long _connect_timeout_usec=connect_timeout_usec_default,
  68             int _max_retries=max_retries_default,
  69             std::ostream *_logstream=NULL, log_level_values _log_level=none);
  70
  71         /** @brief read data from the socket and copy it into buffer
  72             @param usec_timeout wait until new data is found, max timeout usecs.
  73                   -1: wait endless
  74                    0: return instantly
  75             @param usec_timeout_remaining if non-NULL the function will write the
  76                   not used time to the given target
  77             @retval true if new data was found (does not mean that the received data
  78                     is a complete packet though)
  79         */
  80         bool fill_buffer(long long usec_timeout=-1, long long *usec_timeout_remaining=NULL)
  81             { return socket_handler::fill_buffer(buffer,usec_timeout,usec_timeout_remaining); }
  82
  83         void close();
  84
  85         void reconnect();
  86
  87         std::string get_last_error_msg(void)
  88             { return lastErrorMsg; }
  89 };
  90
  91 }
  92
  93 #endif