Ejemplos de tipc_disconnect_port en C++ (Cpp)

Ejemplo n.º 1

Archivo: socket.c Proyecto: 0xroot/Blackphone-BP1-Kernel

static u32 filter_rcv(struct sock *sk, struct sk_buff *buf)
{
	struct socket *sock = sk->sk_socket;
	struct tipc_msg *msg = buf_msg(buf);
	u32 recv_q_len;

	/* Reject message if it is wrong sort of message for socket */

	/*
	 * WOULD IT BE BETTER TO JUST DISCARD THESE MESSAGES INSTEAD?
	 * "NO PORT" ISN'T REALLY THE RIGHT ERROR CODE, AND THERE MAY
	 * BE SECURITY IMPLICATIONS INHERENT IN REJECTING INVALID TRAFFIC
	 */

	if (sock->state == SS_READY) {
		if (msg_connected(msg))
			return TIPC_ERR_NO_PORT;
	} else {
		if (msg_mcast(msg))
			return TIPC_ERR_NO_PORT;
		if (sock->state == SS_CONNECTED) {
			if (!msg_connected(msg))
				return TIPC_ERR_NO_PORT;
		} else if (sock->state == SS_CONNECTING) {
			if (!msg_connected(msg) && (msg_errcode(msg) == 0))
				return TIPC_ERR_NO_PORT;
		} else if (sock->state == SS_LISTENING) {
			if (msg_connected(msg) || msg_errcode(msg))
				return TIPC_ERR_NO_PORT;
		} else if (sock->state == SS_DISCONNECTING) {
			return TIPC_ERR_NO_PORT;
		} else /* (sock->state == SS_UNCONNECTED) */ {
			if (msg_connected(msg) || msg_errcode(msg))
				return TIPC_ERR_NO_PORT;
		}
	}

	/* Reject message if there isn't room to queue it */

	recv_q_len = (u32)atomic_read(&tipc_queue_size);
	if (unlikely(recv_q_len >= OVERLOAD_LIMIT_BASE)) {
		if (rx_queue_full(msg, recv_q_len, OVERLOAD_LIMIT_BASE))
			return TIPC_ERR_OVERLOAD;
	}
	recv_q_len = skb_queue_len(&sk->sk_receive_queue);
	if (unlikely(recv_q_len >= (OVERLOAD_LIMIT_BASE / 2))) {
		if (rx_queue_full(msg, recv_q_len, OVERLOAD_LIMIT_BASE / 2))
			return TIPC_ERR_OVERLOAD;
	}

	/* Enqueue message (finally!) */

	TIPC_SKB_CB(buf)->handle = 0;
	atomic_inc(&tipc_queue_size);
	__skb_queue_tail(&sk->sk_receive_queue, buf);

	/* Initiate connection termination for an incoming 'FIN' */

	if (unlikely(msg_errcode(msg) && (sock->state == SS_CONNECTED))) {
		sock->state = SS_DISCONNECTING;
		tipc_disconnect_port(tipc_sk_port(sk));
	}

	if (waitqueue_active(sk_sleep(sk)))
		wake_up_interruptible(sk_sleep(sk));
	return TIPC_OK;
}

Ejemplo n.º 2

Archivo: socket.c Proyecto: AllenWeb/linux

/**
 * filter_rcv - validate incoming message
 * @sk: socket
 * @buf: message
 *
 * Enqueues message on receive queue if acceptable; optionally handles
 * disconnect indication for a connected socket.
 *
 * Called with socket lock already taken; port lock may also be taken.
 *
 * Returns TIPC error status code (TIPC_OK if message is not to be rejected)
 */
static u32 filter_rcv(struct sock *sk, struct sk_buff *buf)
{
	struct socket *sock = sk->sk_socket;
	struct tipc_msg *msg = buf_msg(buf);
	u32 recv_q_len;

	/* Reject message if it is wrong sort of message for socket */
	if (msg_type(msg) > TIPC_DIRECT_MSG)
		return TIPC_ERR_NO_PORT;

	if (sock->state == SS_READY) {
		if (msg_connected(msg))
			return TIPC_ERR_NO_PORT;
	} else {
		if (msg_mcast(msg))
			return TIPC_ERR_NO_PORT;
		if (sock->state == SS_CONNECTED) {
			if (!msg_connected(msg) ||
			    !tipc_port_peer_msg(tipc_sk_port(sk), msg))
				return TIPC_ERR_NO_PORT;
		} else if (sock->state == SS_CONNECTING) {
			if (!msg_connected(msg) && (msg_errcode(msg) == 0))
				return TIPC_ERR_NO_PORT;
		} else if (sock->state == SS_LISTENING) {
			if (msg_connected(msg) || msg_errcode(msg))
				return TIPC_ERR_NO_PORT;
		} else if (sock->state == SS_DISCONNECTING) {
			return TIPC_ERR_NO_PORT;
		} else /* (sock->state == SS_UNCONNECTED) */ {
			if (msg_connected(msg) || msg_errcode(msg))
				return TIPC_ERR_NO_PORT;
		}
	}

	/* Reject message if there isn't room to queue it */
	recv_q_len = (u32)atomic_read(&tipc_queue_size);
	if (unlikely(recv_q_len >= OVERLOAD_LIMIT_BASE)) {
		if (rx_queue_full(msg, recv_q_len, OVERLOAD_LIMIT_BASE))
			return TIPC_ERR_OVERLOAD;
	}
	recv_q_len = skb_queue_len(&sk->sk_receive_queue);
	if (unlikely(recv_q_len >= (OVERLOAD_LIMIT_BASE / 2))) {
		if (rx_queue_full(msg, recv_q_len, OVERLOAD_LIMIT_BASE / 2))
			return TIPC_ERR_OVERLOAD;
	}

	/* Enqueue message (finally!) */
	TIPC_SKB_CB(buf)->handle = 0;
	atomic_inc(&tipc_queue_size);
	__skb_queue_tail(&sk->sk_receive_queue, buf);

	/* Initiate connection termination for an incoming 'FIN' */
	if (unlikely(msg_errcode(msg) && (sock->state == SS_CONNECTED))) {
		sock->state = SS_DISCONNECTING;
		tipc_disconnect_port(tipc_sk_port(sk));
	}

	if (waitqueue_active(sk_sleep(sk)))
		wake_up_interruptible(sk_sleep(sk));
	return TIPC_OK;
}