tcp_rcv_drain
static void tcp_rcv_drain(int sock_id, tcp_t *);
tcp_rcv_drain(sock_id, tcp);
tcp_rcv_drain(sock_id, tcp);
tcp_rcv_drain(sock_id, tcp);
flags |= tcp_rcv_drain(tcp);
flags |= tcp_rcv_drain(tcp);
flags |= tcp_rcv_drain(tcp);
flags |= tcp_rcv_drain(tcp);
tcp_rcv_drain(tcp) == TH_ACK_NEEDED)
(void) tcp_rcv_drain(tcp);
extern uint_t tcp_rcv_drain(tcp_t *);