#define __LIBT2N_CONNECTION
#include <string>
+#include <vector>
+#include <list>
+#include <iostream>
+
+#include <boost/function.hpp>
+
+#include <netinet/in.h>
+
+#include "types.hxx"
namespace libt2n
{
+/** @brief a connection between client and server. abstact.
+*/
class connection
{
private:
bool closed;
+ /// vector initialized for all callback-types, all elements in each list will be called
+ std::vector<std::list<boost::function<void ()> > > callbacks;
+
protected:
connection()
- { closed=false; }
+ : callbacks(__events_end), closed(false)
+ { }
std::string buffer;
- typedef unsigned int packet_size_indicator;
+ typedef uint32_t packet_size_indicator;
packet_size_indicator bytes_available();
virtual void real_write(const std::string& data)=0;
+ virtual std::ostream* get_logstream(log_level_values level)=0;
+
+ void do_callbacks(callback_event_type event);
+
+ void reopen(void);
+ void remove_incomplete_packets();
+
public:
- ~connection()
- { close(); }
+ virtual ~connection();
+ /// is this connection closed or not
bool is_closed()
{ return closed; }
- virtual void close()
- { closed=true; }
+ /// close this connection
+ virtual void close();
+
+ /** @brief look for new data and store it in the local buffer
+ @param usec_timeout wait until new data is found, max timeout usecs.
+ -1: wait endless
+ 0: return instantly
+ @param usec_timeout_remaining if non-NULL the function will write the
+ not used time to the given target
+ @retval true if new data was found (does not mean that the received data
+ is a complete packet though)
+ */
+ virtual bool fill_buffer(long long usec_timeout=-1,long long* usec_timeout_remaining=NULL)=0;
- virtual void fill_buffer(long long usec_timeout=-1)=0;
bool get_packet(std::string& data);
+
+ unsigned int peek_packet(std::string& data);
+
+ /// returns true if a complete data packet is in the buffer. retrieve it with get_packet().
bool packet_available()
{ return bytes_available(); }
void write(const std::string& data);
+
+ void add_callback(callback_event_type event, const boost::function<void ()>& func);
+
+ std::list<boost::function<void ()> > get_callback_list(callback_event_type event);
};
}