de5a6163d5
Squashed commit of the following:
net/: Fix some naming inconsistencies, Fix final compilation issies.
net/inet/inet_close(): Now that we have logic to drain the buffered TX data, we can implement a proper lingering close.
net/inet,tcp,udp: Add functions to wait for write buffers to drain.
net/udp: Add support for notification when the UDP write buffer becomes empty.
net/tcp: Add support for notification when the TCP write buffer becomes empty.
111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/****************************************************************************
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* net/inet/inet_txdrain.c
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*
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* Copyright (C) 2019 Gregory Nutt. All rights 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 <sys/types.h>
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#include <sys/socket.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <nuttx/net/net.h>
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#include "udp/udp.h"
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#include "tcp/tcp.h"
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#include "inet/inet.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: inet_txdrain
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*
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* Description:
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* Wait for any buffered Tx data to be sent from the socket. This is part
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* of the implementation of SO_LINGER
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*
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* Parameters:
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* psock - Pointer to the socket structure instance
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* abstime - The absolute time when the timeout will occur
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*
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* Returned Value:
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* Zero (OK) is returned on success; a negated error value is returned on
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* any failure.
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*
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****************************************************************************/
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int inet_txdrain(FAR struct socket *psock,
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FAR const struct timespec *abstime)
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{
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int ret = OK;
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DEBUGASSERT(psock != NULL);
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/* Draining depends on the socket family */
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switch (psock->s_type)
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{
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#if defined(NET_TCP_HAVE_STACK) && defined(CONFIG_NET_TCP_WRITE_BUFFERS)
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case SOCK_STREAM:
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{
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ret = tcp_txdrain(psock, abstime);
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}
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break;
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#endif
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#if defined(NET_UDP_HAVE_STACK) && defined(CONFIG_NET_UDP_WRITE_BUFFERS)
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case SOCK_DGRAM:
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{
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ret = udp_txdrain(psock, abstime);
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}
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break;
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#endif
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/* Other protocols do no support write buffering */
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default:
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break;
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}
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return ret;
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}
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