129 lines
4.4 KiB
C
129 lines
4.4 KiB
C
/****************************************************************************
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* net/net_clone.c
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*
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* Copyright (C) 2009, 2011-2013 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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#ifdef CONFIG_NET
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#include <sys/socket.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/net/tcp.h>
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#include <nuttx/net/udp.h>
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#include "net.h"
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/****************************************************************************
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* Global Functions
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****************************************************************************/
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/****************************************************************************
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* Function: net_clone
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*
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* Description:
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* Performs the low level, common portion of net_dup() and net_dup2()
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*
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****************************************************************************/
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int net_clone(FAR struct socket *psock1, FAR struct socket *psock2)
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{
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net_lock_t flags;
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int ret = OK;
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/* Parts of this operation need to be atomic */
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flags = net_lock();
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/* Duplicate the socket state */
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psock2->s_type = psock1->s_type; /* Protocol type: Only SOCK_STREAM or SOCK_DGRAM */
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psock2->s_flags = psock1->s_flags; /* See _SF_* definitions */
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#ifdef CONFIG_NET_SOCKOPTS
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psock2->s_options = psock1->s_options; /* Selected socket options */
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#ifndef CONFIG_DISABLE_CLOCK
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psock2->s_rcvtimeo = psock1->s_rcvtimeo; /* Receive timeout value (in deciseconds) */
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psock2->s_sndtimeo = psock1->s_sndtimeo; /* Send timeout value (in deciseconds) */
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#ifdef CONFIG_NET_SOLINGER
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psock2->s_linger = psock1->s_linger; /* Linger timeout value (in deciseconds) */
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#endif
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#endif
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#endif
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psock2->s_conn = psock1->s_conn; /* UDP or TCP connection structure */
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#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
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psock2->s_sndcb = NULL; /* Force allocation of new callback
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* instance for TCP send */
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#endif
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/* Increment the reference count on the connection */
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DEBUGASSERT(psock2->s_conn);
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psock2->s_crefs = 1; /* One reference on the new socket itself */
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#ifdef CONFIG_NET_TCP
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if (psock2->s_type == SOCK_STREAM)
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{
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FAR struct tcp_conn_s *conn = psock2->s_conn;
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DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
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conn->crefs++;
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}
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else
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#endif
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#ifdef CONFIG_NET_UDP
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if (psock2->s_type == SOCK_DGRAM)
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{
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FAR struct udp_conn_s *conn = psock2->s_conn;
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DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
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conn->crefs++;
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}
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else
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#endif
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{
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ndbg("Unsupported type: %d\n", psock2->s_type);
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ret = -EBADF;
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}
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net_unlock(flags);
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return ret;
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}
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#endif /* CONFIG_NET */
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