send_ack
send_ack:
goto send_ack; /* rexmit */
send_ack(p->tx, wh->i_addr2);
send_ack(p->tx, wh->i_addr2);
int rc = send_ack(p->tx, wh->i_addr2);
int send_ack(int fd, char *mac);
send_ack(tx);
send_ack(tx);
send_ack:
goto send_ack; /* resend ack */