02b652ce1c
* fix ieee802154/ieee802154_input.c:179:7: error: too few arguments to function 'iob_free'
iob_free(container->ic_iob);
^~~~~~~~
ieee802154/ieee802154_input.c:180:7: error: too many arguments to function 'ieee802154_container_free'
ieee802154_container_free(container, IOBUSER_NET_SOCK_IEEE802154);
^~~~~~~~~~~~~~~~~~~~~~~~~
* fix udp/udp_netpoll.c:327:10: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
* fix local/local_netpoll.c:154:15: warning: implicit declaration of function 'nxsem_post'; did you mean 'sem_post'? [-Wimplicit-function-declaration]
nxsem_post(fds->sem);
^~~~~~~~~~
sem_post
392 lines
11 KiB
C
392 lines
11 KiB
C
/****************************************************************************
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* net/udp/udp_netpoll.c
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*
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* Copyright (C) 2008-2009, 2011-2015, 2018 Gregory Nutt. All rights
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* reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <assert.h>
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#include <poll.h>
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#include <debug.h>
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#include <nuttx/net/net.h>
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#include <nuttx/semaphore.h>
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#include "devif/devif.h"
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#include "netdev/netdev.h"
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#include "socket/socket.h"
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#include "udp/udp.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: udp_poll_eventhandler
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*
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* Description:
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* This function is called to perform the actual UDP receive operation
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* via the device interface layer.
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*
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* Input Parameters:
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* dev The structure of the network driver that caused the event
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* conn The connection structure associated with the socket
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* flags Set of events describing why the callback was invoked
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* This function must be called with the network locked.
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*
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****************************************************************************/
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static uint16_t udp_poll_eventhandler(FAR struct net_driver_s *dev,
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FAR void *conn,
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FAR void *pvpriv, uint16_t flags)
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{
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FAR struct udp_poll_s *info = (FAR struct udp_poll_s *)pvpriv;
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ninfo("flags: %04x\n", flags);
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DEBUGASSERT(!info || (info->psock && info->fds));
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/* 'priv' might be null in some race conditions (?) */
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if (info)
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{
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pollevent_t eventset = 0;
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/* Check for data or connection availability events. */
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if ((flags & UDP_NEWDATA) != 0)
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{
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eventset |= (POLLIN & info->fds->events);
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}
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/* Check for loss of connection events. */
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if ((flags & NETDEV_DOWN) != 0)
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{
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eventset |= (POLLHUP | POLLERR);
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}
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/* A poll is a sign that we are free to send data. */
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else if ((flags & UDP_POLL) != 0 && psock_udp_cansend(info->psock) >= 0)
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{
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eventset |= (POLLOUT & info->fds->events);
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}
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/* Awaken the caller of poll() is requested event occurred. */
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if (eventset)
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{
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info->fds->revents |= eventset;
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nxsem_post(info->fds->sem);
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}
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}
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return flags;
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}
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/****************************************************************************
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* Name: udp_iob_work
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*
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* Description:
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* Work thread callback function execute when an IOB because available.
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*
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* Input Parameters:
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* psock - Socket state structure
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#if defined(CONFIG_NET_UDP_WRITE_BUFFERS) && defined(CONFIG_IOB_NOTIFIER)
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static inline void udp_iob_work(FAR void *arg)
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{
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FAR struct udp_poll_s *pinfo;
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FAR struct socket *psock;
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FAR struct pollfd *fds;
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pinfo = (FAR struct udp_poll_s *)arg;
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DEBUGASSERT(pinfo->psock != NULL && pinfo->fds != NULL);
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psock = pinfo->psock;
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fds = pinfo->fds;
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/* Handle a race condition. Check if we have already posted the POLLOUT
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* event. If so, don't do it again.
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*/
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if ((fds->events & POLLWRNORM) != 0 &&
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(fds->revents & POLLWRNORM) == 0)
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{
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/* Check if we are now able to send */
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if (psock_udp_cansend(psock) >= 0)
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{
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/* Yes.. then signal the poll logic */
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fds->revents |= POLLWRNORM;
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nxsem_post(fds->sem);
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}
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else
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{
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/* No.. ask for the IOB free notification again */
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pinfo->key = iob_notifier_setup(LPWORK, udp_iob_work, pinfo);
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}
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}
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: udp_pollsetup
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*
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* Description:
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* Setup to monitor events on one UDP/IP socket
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*
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* Input Parameters:
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* psock - The UDP/IP socket of interest
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* fds - The structure describing the events to be monitored, OR NULL if
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* this is a request to stop monitoring events.
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*
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* Returned Value:
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* 0: Success; Negated errno on failure
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*
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****************************************************************************/
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int udp_pollsetup(FAR struct socket *psock, FAR struct pollfd *fds)
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{
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FAR struct udp_conn_s *conn = psock->s_conn;
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FAR struct udp_poll_s *info;
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FAR struct devif_callback_s *cb;
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int ret = OK;
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/* Sanity check */
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#ifdef CONFIG_DEBUG_FEATURES
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if (conn == NULL || fds == NULL)
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{
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return -EINVAL;
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}
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#endif
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/* Some of the following must be atomic */
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net_lock();
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/* Find a container to hold the poll information */
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info = conn->pollinfo;
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while (info->psock != NULL)
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{
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if (++info >= &conn->pollinfo[CONFIG_NET_UDP_NPOLLWAITERS])
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{
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ret = -ENOMEM;
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goto errout_with_lock;
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}
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}
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/* Get the device that will provide the provide the NETDEV_DOWN event.
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* NOTE: in the event that the local socket is bound to INADDR_ANY, the
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* dev value will be zero and there will be no NETDEV_DOWN notifications.
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*/
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info->dev = udp_find_laddr_device(conn);
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/* Allocate a UDP callback structure */
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cb = udp_callback_alloc(info->dev, conn);
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if (cb == NULL)
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{
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ret = -EBUSY;
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goto errout_with_lock;
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}
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/* Initialize the poll info container */
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info->psock = psock;
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info->fds = fds;
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info->cb = cb;
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#if defined(CONFIG_NET_UDP_WRITE_BUFFERS) && defined(CONFIG_IOB_NOTIFIER)
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info->key = 0;
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#endif
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/* Initialize the callback structure. Save the reference to the info
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* structure as callback private data so that it will be available during
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* callback processing.
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*/
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cb->flags = NETDEV_DOWN;
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cb->priv = (FAR void *)info;
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cb->event = udp_poll_eventhandler;
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if ((fds->events & POLLOUT) != 0)
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{
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cb->flags |= UDP_POLL;
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}
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if ((fds->events & POLLIN) != 0)
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{
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cb->flags |= UDP_NEWDATA;
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}
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/* Save the reference in the poll info structure as fds private as well
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* for use during poll teardown as well.
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*/
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fds->priv = (FAR void *)info;
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#ifdef CONFIG_NET_UDP_READAHEAD
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/* Check for read data availability now */
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if (!IOB_QEMPTY(&conn->readahead))
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{
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/* Normal data may be read without blocking. */
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fds->revents |= (POLLRDNORM & fds->events);
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}
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#endif
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if (psock_udp_cansend(psock) >= 0)
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{
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/* Normal data may be sent without blocking (at least one byte). */
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fds->revents |= (POLLWRNORM & fds->events);
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}
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/* Check if any requested events are already in effect */
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if (fds->revents != 0)
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{
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/* Yes.. then signal the poll logic */
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nxsem_post(fds->sem);
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}
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#if defined(CONFIG_NET_UDP_WRITE_BUFFERS) && defined(CONFIG_IOB_NOTIFIER)
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/* If (1) revents == 0, (2) write buffering is enabled, and (3) the
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* POLLOUT event is needed, then setup to receive a notification an IOB
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* is freed.
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*/
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else if ((fds->events & POLLOUT) != 0)
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{
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/* Ask for the IOB free notification */
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info->key = iob_notifier_setup(LPWORK, udp_iob_work, info);
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}
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#endif
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errout_with_lock:
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net_unlock();
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return ret;
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}
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/****************************************************************************
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* Name: udp_pollteardown
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*
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* Description:
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* Teardown monitoring of events on an UDP/IP socket
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*
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* Input Parameters:
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* psock - The UDP socket of interest
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* fds - The structure describing the events to be monitored, OR NULL if
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* this is a request to stop monitoring events.
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*
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* Returned Value:
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* 0: Success; Negated errno on failure
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*
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****************************************************************************/
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int udp_pollteardown(FAR struct socket *psock, FAR struct pollfd *fds)
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{
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FAR struct udp_conn_s *conn = psock->s_conn;
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FAR struct udp_poll_s *info;
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/* Sanity check */
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#ifdef CONFIG_DEBUG_FEATURES
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if (!conn || !fds->priv)
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{
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return -EINVAL;
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}
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#endif
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/* Recover the socket descriptor poll state info from the poll structure */
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info = (FAR struct udp_poll_s *)fds->priv;
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DEBUGASSERT(info != NULL && info->fds != NULL && info->cb != NULL);
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if (info != NULL)
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{
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#if defined(CONFIG_NET_UDP_WRITE_BUFFERS) && defined(CONFIG_IOB_NOTIFIER)
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/* Cancel any pending IOB free notification */
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if (info->key > 0)
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{
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/* Ask for the IOB free notification */
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iob_notifier_teardown(info->key);
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}
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#endif
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/* Release the callback */
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udp_callback_free(info->dev, conn, info->cb);
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/* Release the poll/select data slot */
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info->fds->priv = NULL;
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/* Then free the poll info container */
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info->psock = NULL;
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}
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return OK;
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}
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