コード例 #1
0
ファイル: connect.c プロジェクト: casro/vrbrain_nuttx
static inline int tcp_setup_callbacks(FAR struct socket *psock,
                                      FAR struct tcp_connect_s *pstate)
{
  FAR struct uip_conn *conn = psock->s_conn;
  int ret = -EBUSY;

  /* Initialize the TCP state structure */

  (void)sem_init(&pstate->tc_sem, 0, 0); /* Doesn't really fail */
  pstate->tc_conn   = conn;
  pstate->tc_result = -EAGAIN;

  /* Set up the callbacks in the connection */

  pstate->tc_cb = uip_tcpcallbackalloc(conn);
  if (pstate->tc_cb)
    {
      /* Set up the connection "interrupt" handler */

      pstate->tc_cb->flags   = UIP_NEWDATA|UIP_CLOSE|UIP_ABORT|UIP_TIMEDOUT|UIP_CONNECTED;
      pstate->tc_cb->priv    = (void*)pstate;
      pstate->tc_cb->event   = tcp_connect_interrupt;

      /* Set up the connection event monitor */

      net_startmonitor(psock);
      ret = OK;
    }
  return ret;
}
コード例 #2
0
ファイル: net_close.c プロジェクト: 1015472/PX4NuttX
static inline void netclose_disconnect(FAR struct socket *psock)
{
  struct tcp_close_s state;
  uip_lock_t flags;

  /* Interrupts are disabled here to avoid race conditions */

  flags = uip_lock();

  /* Is the TCP socket in a connected state? */

  if (_SS_ISCONNECTED(psock->s_flags))
    {
       struct uip_conn *conn = (struct uip_conn*)psock->s_conn;

       /* Check for the case where the host beat us and disconnected first */

       if (conn->tcpstateflags == UIP_ESTABLISHED)
         {
           /* Set up to receive TCP data event callbacks */

           state.cl_cb = uip_tcpcallbackalloc(conn);
           if (state.cl_cb)
             {
               state.cl_psock       = psock;
               sem_init(&state.cl_sem, 0, 0);

               state.cl_cb->flags   = UIP_NEWDATA|UIP_POLL|UIP_CLOSE|UIP_ABORT;
               state.cl_cb->priv    = (void*)&state;
               state.cl_cb->event   = netclose_interrupt;

              /* Notify the device driver of the availaibilty of TX data */

               netdev_txnotify(&conn->ripaddr);

               /* Wait for the disconnect event */

               (void)uip_lockedwait(&state.cl_sem);

               /* We are now disconnected */

               sem_destroy(&state.cl_sem);
               uip_tcpcallbackfree(conn, state.cl_cb);
            }
        }
    }

  uip_unlock(flags);
}
コード例 #3
0
ファイル: net_poll.c プロジェクト: CNCBASHER/Firmware
static inline int net_pollsetup(FAR struct socket *psock,
                                FAR struct pollfd *fds)
{
  FAR struct uip_conn *conn = psock->s_conn;
  FAR struct net_poll_s *info;
  FAR struct uip_callback_s *cb;
  uip_lock_t flags;
  int ret;

  /* Sanity check */

#ifdef CONFIG_DEBUG
  if (!conn || !fds)
    {
      return -EINVAL;
    }
#endif

  /* Allocate a container to hold the poll information */

  info = (FAR struct net_poll_s *)kmalloc(sizeof(struct net_poll_s));
  if (!info)
    {
      return -ENOMEM;
    }
  
  /* Some of the  following must be atomic */

  flags = uip_lock();

  /* Allocate a TCP/IP callback structure */

  cb = uip_tcpcallbackalloc(conn);
  if (!cb)
    {
      ret = -EBUSY;
      goto errout_with_lock;
    }

  /* Initialize the poll info container */

  info->psock  = psock;
  info->fds    = fds;
  info->cb     = cb;

  /* Initialize the callback structure.  Save the reference to the info
   * structure as callback private data so that it will be available during
   * callback processing.
   */

  cb->flags    = (UIP_NEWDATA|UIP_BACKLOG|UIP_POLL|UIP_CLOSE|UIP_ABORT|UIP_TIMEDOUT);
  cb->priv     = (FAR void *)info;
  cb->event    = poll_interrupt;

  /* Save the reference in the poll info structure as fds private as well
   * for use durring poll teardown as well.
   */

  fds->priv    = (FAR void *)info;

#ifdef CONFIG_NET_TCPBACKLOG
  /* Check for read data or backlogged connection availability now */

  if (!sq_empty(&conn->readahead) || uip_backlogavailable(conn))
#else
  /* Check for read data availability now */

  if (!sq_empty(&conn->readahead))
#endif
    {
      fds->revents |= (POLLOUT & fds->events);
    }

  /* Check for a loss of connection events */

  if (!_SS_ISCONNECTED(psock->s_flags))
    {
      fds->revents |= (POLLERR | POLLHUP);
    }

  /* Check if any requested events are already in effect */

  if (fds->revents != 0)
    {
      /* Yes.. then signal the poll logic */

      sem_post(fds->sem);
    }

  uip_unlock(flags);
  return OK;

errout_with_lock:
  kfree(info);
  uip_unlock(flags);
  return ret;
}
コード例 #4
0
ファイル: send.c プロジェクト: grissiom/muttx-mirror
ssize_t send(int sockfd, const void *buf, size_t len, int flags)
{
  FAR struct socket *psock = sockfd_socket(sockfd);
  struct send_s state;
  uip_lock_t save;
  int err;
  int ret = OK;

  /* Verify that the sockfd corresponds to valid, allocated socket */

  if (!psock || psock->s_crefs <= 0)
    {
      err = EBADF;
      goto errout;
    }

  /* If this is an un-connected socket, then return ENOTCONN */

  if (psock->s_type != SOCK_STREAM || !_SS_ISCONNECTED(psock->s_flags))
    {
      err = ENOTCONN;
      goto errout;
    }

  /* Set the socket state to sending */

  psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_SEND);

  /* Perform the TCP send operation */

  /* Initialize the state structure.  This is done with interrupts
   * disabled because we don't want anything to happen until we
   * are ready.
   */

  save                = uip_lock();
  memset(&state, 0, sizeof(struct send_s));
  (void)sem_init(&state. snd_sem, 0, 0); /* Doesn't really fail */
  state.snd_sock      = psock;             /* Socket descriptor to use */
  state.snd_buflen    = len;               /* Number of bytes to send */
  state.snd_buffer    = buf;               /* Buffer to send from */

  if (len > 0)
    {
      struct uip_conn *conn = (struct uip_conn*)psock->s_conn;

      /* Allocate resources to receive a callback */

      state.snd_cb = uip_tcpcallbackalloc(conn);
      if (state.snd_cb)
        {
          /* Get the initial sequence number that will be used */

          state.snd_isn         = uip_tcpgetsequence(conn->sndseq);

          /* There is no outstanding, unacknowledged data after this
           * initial sequence number.
           */

          conn->unacked         = 0;

          /* Update the initial time for calculating timeouts */

#if defined(CONFIG_NET_SOCKOPTS) && !defined(CONFIG_DISABLE_CLOCK)
          state.snd_time        = clock_systimer();
#endif
          /* Set up the callback in the connection */

          state.snd_cb->flags   = UIP_ACKDATA|UIP_REXMIT|UIP_POLL|UIP_CLOSE|UIP_ABORT|UIP_TIMEDOUT;
          state.snd_cb->priv    = (void*)&state;
          state.snd_cb->event   = send_interrupt;

          /* Notify the device driver of the availaibilty of TX data */

          netdev_txnotify(&conn->ripaddr);

          /* Wait for the send to complete or an error to occur:  NOTES: (1)
           * uip_lockedwait will also terminate if a signal is received, (2) interrupts
           * may be disabled!  They will be re-enabled while the task sleeps and
           * automatically re-enabled when the task restarts.
           */

          ret = uip_lockedwait(&state. snd_sem);

          /* Make sure that no further interrupts are processed */

          uip_tcpcallbackfree(conn, state.snd_cb);
        }
    }

  sem_destroy(&state. snd_sem);
  uip_unlock(save);

  /* Set the socket state to idle */

  psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_IDLE);

  /* Check for a errors.  Errors are signaled by negative errno values
   * for the send length
   */

  if (state.snd_sent < 0)
    {
      err = state.snd_sent;
      goto errout;
    }

  /* If uip_lockedwait failed, then we were probably reawakened by a signal. In
   * this case, uip_lockedwait will have set errno appropriately.
   */

  if (ret < 0)
    {
      err = -ret;
      goto errout;
    }

  /* Return the number of bytes actually sent */

  return state.snd_sent;

errout:
  *get_errno_ptr() = err;
  return ERROR;
}
コード例 #5
0
ファイル: recvfrom.c プロジェクト: DuinoPilot/Firmware
static ssize_t tcp_recvfrom(FAR struct socket *psock, FAR void *buf, size_t len,
                            FAR struct sockaddr_in *infrom )
#endif
{
  struct recvfrom_s       state;
  uip_lock_t              save;
  int                     ret;

  /* Initialize the state structure.  This is done with interrupts
   * disabled because we don't want anything to happen until we
   * are ready.
   */

  save = uip_lock();
  recvfrom_init(psock, buf, len, infrom, &state);

  /* Handle any any TCP data already buffered in a read-ahead buffer.  NOTE
   * that there may be read-ahead data to be retrieved even after the
   * socket has been disconnected.
   */

#if CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0
  recvfrom_readahead(&state);

  /* The default return value is the number of bytes that we just copied into
   * the user buffer.  We will return this if the socket has become disconnected
   * or if the user request was completely satisfied with data from the readahead
   * buffers.
   */
   
  ret = state.rf_recvlen;

#else
  /* Otherwise, the default return value of zero is used (only for the case
   * where len == state.rf_buflen is zero).
   */

  ret = 0;
#endif

  /* Verify that the SOCK_STREAM has been and still is connected */

  if (!_SS_ISCONNECTED(psock->s_flags))
    {
      /* Was any data transferred from the readahead buffer after we were
       * disconnected?  If so, then return the number of bytes received.  We
       * will wait to return end disconnection indications the next time that
       * recvfrom() is called.
       *
       * If no data was received (i.e.,  ret == 0  -- it will not be negative)
       * and the connection was gracefully closed by the remote peer, then return
       * success.  If rf_recvlen is zero, the caller of recvfrom() will get an
       * end-of-file indication.
       */

#if CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0
      if (ret <= 0 && !_SS_ISCLOSED(psock->s_flags))
#else
      if (!_SS_ISCLOSED(psock->s_flags))
#endif
        {
          /* Nothing was previously received from the readahead buffers.
           * The SOCK_STREAM must be (re-)connected in order to receive any
           * additional data.
           */

          ret = -ENOTCONN;
        }
    }

  /* In general, this uIP-based implementation will not support non-blocking
   * socket operations... except in a few cases:  Here for TCP receive with read-ahead
   * enabled.  If this socket is configured as non-blocking then return EAGAIN
   * if no data was obtained from the read-ahead buffers.
   */

  else
#if CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0
  if (_SS_ISNONBLOCK(psock->s_flags))
    {
      /* Return the number of bytes read from the read-ahead buffer if
       * something was received (already in 'ret'); EAGAIN if not.
       */

      if (ret <= 0)
        {
          /* Nothing was received */

          ret = -EAGAIN;
        }
    }

  /* It is okay to block if we need to.  If there is space to receive anything
   * more, then we will wait to receive the data.  Otherwise return the number
   * of bytes read from the read-ahead buffer (already in 'ret').
   */

  else
#endif

  /* We get here when we we decide that we need to setup the wait for incoming
   * TCP/IP data.  Just a few more conditions to check:
   *
   * 1) Make sure thet there is buffer space to receive additional data
   *    (state.rf_buflen > 0).  This could be zero, for example, if read-ahead
   *    buffering was enabled and we filled the user buffer with data from
   *    the read-ahead buffers.  Aand
   * 2) if read-ahead buffering is enabled (CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0)
   *    and delay logic is disabled (CONFIG_NET_TCP_RECVDELAY == 0), then we
   *    not want to wait if we already obtained some data from the read-ahead
   *    buffer.  In that case, return now with what we have (don't want for more
   *    because there may be no timeout).
   */

#if CONFIG_NET_TCP_RECVDELAY == 0 && CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0
  if (state.rf_recvlen == 0 && state.rf_buflen > 0)
#else
  if (state.rf_buflen > 0)
#endif
    {
      struct uip_conn *conn = (struct uip_conn *)psock->s_conn;

      /* Set up the callback in the connection */

      state.rf_cb = uip_tcpcallbackalloc(conn);
      if (state.rf_cb)
        {
          state.rf_cb->flags   = UIP_NEWDATA|UIP_POLL|UIP_CLOSE|UIP_ABORT|UIP_TIMEDOUT;
          state.rf_cb->priv    = (void*)&state;
          state.rf_cb->event   = recvfrom_tcpinterrupt;

          /* Wait for either the receive to complete or for an error/timeout to occur.
           * NOTES:  (1) uip_lockedwait will also terminate if a signal is received, (2)
           * interrupts may be disabled!  They will be re-enabled while the task sleeps
           * and automatically re-enabled when the task restarts.
           */

          ret = uip_lockedwait(&state.rf_sem);

          /* Make sure that no further interrupts are processed */

          uip_tcpcallbackfree(conn, state.rf_cb);
          ret = recvfrom_result(ret, &state);
        }
      else
        {
          ret = -EBUSY;
        }
    }

  uip_unlock(save);
  recvfrom_uninit(&state);
  return (ssize_t)ret;
}
コード例 #6
0
ファイル: net_poll.c プロジェクト: drasko/opendous_nuttx
static inline int net_pollsetup(FAR struct socket *psock, struct pollfd *fds)
{
  FAR struct uip_conn *conn = psock->s_conn;
  FAR struct uip_callback_s *cb;
  uip_lock_t flags;
  int ret;

  /* Sanity check */

#ifdef CONFIG_DEBUG
  if (!conn || !fds)
    {
      return -EINVAL;
    }
#endif

  /* Some of the  following must be atomic */

  flags = uip_lock();

  /* Allocate a TCP/IP callback structure */

  cb = uip_tcpcallbackalloc(conn);
  if (!cb)
    {
      ret = -EBUSY;
      goto errout_with_irq;
    }

  /* Initialize the callbcack structure */

  cb->flags    = UIP_NEWDATA|UIP_BACKLOG|UIP_POLL|UIP_CLOSE|UIP_ABORT|UIP_TIMEDOUT;
  cb->priv     = (FAR void *)fds;
  cb->event    = poll_interrupt;

  /* Save the nps reference in the poll structure for use at teardown as well */

  fds->priv    = (FAR void *)cb;

#ifdef CONFIG_NET_TCPBACKLOG
  /* Check for read data or backlogged connection availability now */

  if (!sq_empty(&conn->readahead) || uip_backlogavailable(conn))
#else
  /* Check for read data availability now */

  if (!sq_empty(&conn->readahead))
#endif
    {
      fds->revents = fds->events & POLLIN;
      if (fds->revents != 0)
        {
          /* If data is available now, the signal the poll logic */

          sem_post(fds->sem);
        }
    }
  uip_unlock(flags);
  return OK;

errout_with_irq:
  uip_unlock(flags);
  return ret;
}
コード例 #7
0
ssize_t psock_send(FAR struct socket *psock, FAR const void *buf, size_t len,
                   int flags)
{
  uip_lock_t save;
  size_t     completed = 0;
  int        err;
  int        ret = OK;

  if (!psock || psock->s_crefs <= 0)
    {
      err = EBADF;
      goto errout;
    }

  if (psock->s_type != SOCK_STREAM || !_SS_ISCONNECTED(psock->s_flags))
    {
      err = ENOTCONN;
      goto errout;
    }

  /* Set the socket state to sending */

  psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_SEND);

  save = uip_lock();

  if (len > 0)
    {
      struct uip_conn *conn = (struct uip_conn*)psock->s_conn;

      if (!psock->s_sndcb)
        {
          psock->s_sndcb = uip_tcpcallbackalloc(conn);

          /* Set up the callback in the connection */

          psock->s_sndcb->flags = (UIP_ACKDATA | UIP_REXMIT |UIP_POLL | \
                                  UIP_CLOSE | UIP_ABORT | UIP_TIMEDOUT);
          psock->s_sndcb->priv  = (void*)psock;
          psock->s_sndcb->event = send_interrupt;
        }

      /* Allocate resources to receive a callback */

      while (completed < len)
        {
          FAR struct uip_wrbuffer_s *segment = uip_tcpwrbuffer_alloc(NULL);
          if (segment)
            {
              size_t cnt;

              segment->wb_seqno = (unsigned)-1;
              segment->wb_nrtx  = 0;

              if (len - completed > CONFIG_NET_TCP_WRITE_BUFSIZE)
                {
                  cnt = CONFIG_NET_TCP_WRITE_BUFSIZE;
                }
              else
                {
                  cnt = len - completed;
                }

              segment->wb_nbytes = cnt;
              memcpy(segment->wb_buffer, (char*)buf + completed, cnt);
              completed += cnt;

              /* send_interrupt() will refer to all the write buffer by
               * conn->writebuff
               */

              sq_addlast(&segment->wb_node, &conn->write_q);

              /* Notify the device driver of the availability of TX data */

              netdev_txnotify(conn->ripaddr);
            }
        }
    }

  uip_unlock(save);

  /* Set the socket state to idle */

  psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_IDLE);

  /* Check for a errors.  Errors are signaled by negative errno values
   * for the send length
   */

  if (completed < 0)
    {
      err = completed;
      goto errout;
    }

  /* If uip_lockedwait failed, then we were probably reawakened by a signal.
   * In this case, uip_lockedwait will have set errno appropriately.
   */

  if (ret < 0)
    {
      err = -ret;
      goto errout;
    }

  /* Return the number of bytes actually sent */

  return completed;

errout:
  set_errno(err);
  return ERROR;
}