#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
    void main(int argc, char **argv)
    {
    struct sockaddr_in me, server;
    int sock=socket(AF_INET,SOCK_DGRAM,0);
    int adl=sizeof(me);
    char linha[81];
    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]); /* host local */
    server.sin_port=htons(8450); /* porta do servidor */
    do
        {
        gets(linha);
        sendto(sock,linha,81,0,(struct sockaddr *)&server,adl);
        recvfrom(sock,linha,81,0,(struct sockaddr *)&server,&adl);
        puts(linha);
        }
    while(strcmp(linha,"EXIT"));
    close(sock);
    }