Untitled

#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <fcntl.h>



int main()
{

	int socketFd, socketFdAccept;
	struct sockaddr_in A1, A3, A2;
	char IP_priv[9] = "127.0.0.1";
	char IP_wyslania[9] = "127.0.0.1";
	socklen_t _rozmiar;
	char bufor[70];
	int i, K;

	socketFd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if(socketFd == -1){
		puts("Nie da sie stworzyc gniazda");
		perror("socket: ");
		return -1;
	}	
	
	fcntl(socketFd, F_SETFL,O_NONBLOCK|FASYNC);
	A2.sin_family = AF_INET;
	A2.sin_port = htons(33700);	
	A2.sin_addr.s_addr = inet_addr(IP_wyslania);	
	A1.sin_family = AF_INET;
	A1.sin_port = htons(33701);
	A1.sin_addr.s_addr = inet_addr(IP_priv);

	if ( (bind(socketFd, (struct sockaddr*)&A1, sizeof(struct sockaddr))) == -1){
        	printf("Blad konfiguracji\n");
        	close(socketFd);
        	perror("bind: "); 
		return -1;       	
     	}
	_rozmiar = sizeof(struct sockaddr);
	while(1)
	{
		for(i=10; i>0; i--)
		{
			if (recvfrom(socketFd, bufor, 50-1, 0, (struct sockaddr *)&A3, &_rozmiar) <0)
			{
				 K = 0;
		                sleep(1);
			}
			else
			{
				K = 1;
				break;
			}
		}
		sendto(socketFd, &K, sizeof(K), 0, (struct sockaddr*)&A2, sizeof(struct sockaddr));
		if (bufor[0] == 'q') break;
		if(K == 1) printf("%s\n", bufor);
	}
     	close(socketFd);
     	close(socketFdAccept);
	return 0;
}