#include <sys/types.h>
#include <time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>

void main(int argc, char **argv)
{
struct sockaddr_in me, server;
int sock=socket(AF_INET,SOCK_DGRAM,0);
int adl=sizeof(me);
int try, retrys=5, timeout=1, ok, ready;
char linha[81];
struct timeval tt;
fd_set fds;

if(argc!=2) {close(sock);puts("Utilizar o end. IP do servidor na linha de comando");exit(1);}

    bzero((char *)&me,adl);
    me.sin_family=AF_INET;
    me.sin_addr.s_addr=htonl(INADDR_ANY); /* endereco IP local */
    me.sin_port=htons(0); /* porta local (0=auto assign) */
    bind(sock,(struct sockaddr *)&me,adl);
    bzero((char *)&server,adl);
    server.sin_family=AF_INET;
    /* endereco IP de destino */
    server.sin_addr.s_addr=inet_addr(argv[1]); 
    server.sin_port=htons(8450); /* porta do servidor */
do
	{
	gets(linha);
	try=retrys;ok=0;
	while(try && !ok)
		{
		sendto(sock,linha,81,0,(struct sockaddr *)&server,adl);
		FD_ZERO(&fds);FD_SET(sock,&fds);
		tt.tv_sec=timeout;tt.tv_usec=0;
		ready=select(sock+1,&fds,0,0,&tt);
		if(ready<0) perror("Select");
		else
		  if(ready && FD_ISSET(sock,&fds))
			{
        		if(recvfrom(sock,linha,81
        		,0,(struct sockaddr *)&server,&adl)!=-1) ok=1;
			}
        	try--;
		}
	if(ok) puts(linha); else puts("No reply from server");
        }
    while(strcmp(linha,"EXIT"));
    close(sock);
    }