client read problem please help!!!!!

[michael Dorrian]

Here is the relevant code. The problem is in this do_client_loop. I need to read from the server to check if it has closed but when i do this i cannot write to the server again for some reason. How can i rectify this......thanks in advance
int do_client_loop(SSL *ssl)
{
    int  err, nwritten;
    char buf[80];
    for (;;)
    {
    if (!fgets(buf, sizeof(buf), stdin))
            break;
    
        for (nwritten = 0;  nwritten < sizeof(buf);  nwritten += err)
        {       
           err = SSL_write(ssl, buf + nwritten, sizeof(buf) - nwritten);
            if (err <= 0)
                return 0;
       

        }
    err = SSL_read(ssl, buf + nwritten, sizeof(buf) - nwritten);
        if (err <= 0)
            return 0;
    
    }
    return 1;
}
 
int main(int argc, char *argv[])
{
    BIO     *conn;
    SSL     *ssl;
    SSL_CTX *ctx;
    long    err;
    init_OpenSSL(  );
    seed_prng(  );
    clientfile = argv[1];    
    ctx = setup_client_ctx(  );
 
    conn = BIO_new_connect(SERVER ":" PORT);
    if (!conn)
        int_error("Error creating connection BIO");
 
    if (BIO_do_connect(conn) <= 0)
        int_error("Error connecting to remote machine");
 
    ssl = SSL_new(ctx);
    SSL_set_bio(ssl, conn, conn);
    if (SSL_connect(ssl) <= 0)
        int_error("Error connecting SSL object");
    if ((err = post_connection_check(ssl, SERVER)) != X509_V_OK)
    {
        fprintf(stderr, "-Error: peer certificate: %s\n",
                X509_verify_cert_error_string(err));
        int_error("Error checking SSL object after connection");
    }
    fprintf(stderr, "SSL Connection opened\n");
    if (do_client_loop(ssl))
        SSL_shutdown(ssl);
    else
        SSL_clear(ssl);
    fprintf(stderr, "SSL Connection closed\n");
 
    SSL_free(ssl);
    SSL_CTX_free(ctx);
    return 0;
}

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