client.h

java socket server,对初学者很好的参考意义

/*
   a C++ socket server class 

   Keith Vertanen 11/98 
*/

#define BUFFSIZE 64000

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/wait.h>

class Client
{
  // class attibutes
  public:	
	int port;	// the port I'm listening on
	int dataport;	// port I listen for datagrams on (can be same or different from port)
	int REVERSE;
	
  protected:		
	int new_fd;	               // new connection on new_fd
	int datasockfd;	             
	int senddatasockfd;	              
        struct sockaddr_in their_addr; // connector's address information
        struct sockaddr_in my_addr;    // my address information
	struct hostent *he;
	double buffer[BUFFSIZE];	// reuse the same memory for buffer
	double buffer2[BUFFSIZE];

  // class methods
  public:
	Client(int, int, char *host, int);		// constructor
	void closesocket();		                // close the socket

	void send_string(char *str);		        // send a string to socket
	void send_ints(int *vals, int len);	        // send some integers
	void send_bytes(char *vals, int len);           // send some bytes
	void send_floats(float *vals, int len);		// send some floats
	void send_doubles(double *vals, int len);	// send some doubles
	void send_datagram(char *vals, int len);        // send a datagram
	int recv_string(char *str, int max, char term); // recv a string
	int recv_ints(int *vals, int max);  		// recv ints
	int recv_floats(float *vals, int max);  	// recv floats
	int recv_doubles(double *vals, int max);  	// recv doubles
	int recv_bytes(char *vals, int max);  		// recv bytes
	int recv_datagram(char *vals, int len);        // recv a datagram

	private:

	void recv_ack();
	void send_ack();
};