#include "stdio.h"
#include "string.h"
#include "sys/types.h"
#include "sys/socket.h"
#include "stdlib.h"
#include "arpa/inet.h"

#define PORT 42120
#define IP "127.0.0.1"

int main(int argc, char const *argv[])
{
    struct sockaddr_in serwer =
    {
        .sin_family = AF_INET,
        .sin_port = htons( PORT )
    };

	int soc;
	char buffer[ 4096 ] = { };
	inet_pton( AF_INET, IP, & serwer.sin_addr );
	soc = socket(AF_INET, SOCK_DGRAM, 0);
    
	socklen_t len = sizeof( serwer );
	bind( soc,( struct sockaddr * ) & serwer, len );

    while(1)
    {
        struct sockaddr_in client = {};
        memset(buffer, 0, sizeof( buffer ));
        //printf("Oczekuję na połączenie...\n");
        recvfrom( soc, buffer, sizeof( buffer ), 0,( struct sockaddr * ) & client, & len );
        printf("Message %s \n", buffer);
	shutdown( soc, SHUT_RDWR );
	//memset(buffer, 0, sizeof( buffer ));
	return 0;
        
    }
    //shutdown( soc, SHUT_RDWR );
    //return 0;
}

_____________________________________________



#include "stdio.h"
#include "string.h"
#include "sys/types.h"
#include "sys/socket.h"
#include "stdlib.h"
#include "arpa/inet.h"

#define PORT 42120
#define IP "127.0.0.1"

int main(int argc, char const *argv[])
{
    struct sockaddr_in serwer =
    {
        .sin_family = AF_INET,
        .sin_port = htons( PORT )
    };

	int soc; 
	char buffer[ 4096 ];
	inet_pton( AF_INET, IP, & serwer.sin_addr );
    	soc = socket(AF_INET, SOCK_DGRAM, 0);
    
	printf("message: ");
	fgets(buffer, sizeof(buffer), stdin);
    
	socklen_t len = sizeof( serwer );
	bind( soc,( struct sockaddr * ) & serwer, len );
	sendto( soc, buffer, strlen( buffer ), 0,( struct sockaddr * ) & serwer, len );

	shutdown( soc, SHUT_RDWR );
	return 0;
    
}