6a3c2aded6
* Simplify EINTR/ECANCEL error handling 1. Add semaphore uninterruptible wait function 2 .Replace semaphore wait loop with a single uninterruptible wait 3. Replace all sem_xxx to nxsem_xxx * Unify the void cast usage 1. Remove void cast for function because many place ignore the returned value witout cast 2. Replace void cast for variable with UNUSED macro
151 lines
4.6 KiB
C
151 lines
4.6 KiB
C
/****************************************************************************
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* net/igmp/igmp_msg.c
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*
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* Copyright (C) 2010-2011, 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* The NuttX implementation of IGMP was inspired by the IGMP add-on for the
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* lwIP TCP/IP stack by Steve Reynolds:
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*
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* Copyright (c) 2002 CITEL Technologies Ltd.
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* All rights reserved.
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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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
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* may be 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 CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* 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 <assert.h>
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#include <debug.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/igmp.h>
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#include "devif/devif.h"
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#include "netdev/netdev.h"
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#include "igmp/igmp.h"
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#ifdef CONFIG_NET_IGMP
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: igmp_schedmsg
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*
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* Description:
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* Schedule a message to be send at the next driver polling interval.
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*
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* Assumptions:
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* The network is locked.
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*
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****************************************************************************/
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int igmp_schedmsg(FAR struct igmp_group_s *group, uint8_t msgid)
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{
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FAR struct net_driver_s *dev;
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DEBUGASSERT(group != NULL && !IS_SCHEDMSG(group->flags));
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DEBUGASSERT(group->ifindex > 0);
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/* Get the device instance associated with the interface index of the group */
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dev = netdev_findbyindex(group->ifindex);
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if (dev == NULL)
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{
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nerr("ERROR: No device for this interface index: %u\n",
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group->ifindex);
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return -ENODEV;
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}
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/* Schedule the message */
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group->msgid = msgid;
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SET_SCHEDMSG(group->flags);
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/* Notify the device that we have a packet to send */
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netdev_txnotify_dev(dev);
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return OK;
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}
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/****************************************************************************
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* Name: igmp_waitmsg
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*
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* Description:
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* Schedule a message to be send at the next driver polling interval and
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* block, waiting for the message to be sent.
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*
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* Assumptions:
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* The network is locked.
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*
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****************************************************************************/
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int igmp_waitmsg(FAR struct igmp_group_s *group, uint8_t msgid)
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{
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int ret;
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/* Schedule to send the message */
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DEBUGASSERT(!IS_WAITMSG(group->flags));
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SET_WAITMSG(group->flags);
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ret = igmp_schedmsg(group, msgid);
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if (ret < 0)
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{
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nerr("ERROR: Failed to schedule the message: %d\n", ret);
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goto errout;
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}
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/* Then wait for the message to be sent */
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while (IS_SCHEDMSG(group->flags))
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{
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/* Wait for the semaphore to be posted */
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ret = net_lockedwait_uninterruptible(&group->sem);
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if (ret < 0)
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{
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break;
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}
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}
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/* The message has been sent and we are no longer waiting */
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errout:
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CLR_WAITMSG(group->flags);
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return ret;
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}
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#endif /* CONFIG_NET_IGMP */
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