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/****************************************************************************
* net/net_clone.c
*
* Copyright (C) 2009, 2011-2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#ifdef CONFIG_NET
#include <sys/socket.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include "net.h"
/****************************************************************************
* Global Functions
****************************************************************************/
/****************************************************************************
* Function: net_clone
*
* Description:
* Performs the low level, common portion of net_dup() and net_dup2()
*
****************************************************************************/
int net_clone(FAR struct socket *psock1, FAR struct socket *psock2)
{
uip_lock_t flags;
int ret = OK;
/* Parts of this operation need to be atomic */
flags = uip_lock();
/* Duplicate the socket state */
psock2->s_type = psock1->s_type; /* Protocol type: Only SOCK_STREAM or SOCK_DGRAM */
psock2->s_flags = psock1->s_flags; /* See _SF_* definitions */
#ifdef CONFIG_NET_SOCKOPTS
psock2->s_options = psock1->s_options; /* Selected socket options */
#ifndef CONFIG_DISABLE_CLOCK
psock2->s_rcvtimeo = psock1->s_rcvtimeo; /* Receive timeout value (in deciseconds) */
psock2->s_sndtimeo = psock1->s_sndtimeo; /* Send timeout value (in deciseconds) */
#ifdef CONFIG_NET_SOLINGER
psock2->s_linger = psock1->s_linger; /* Linger timeout value (in deciseconds) */
#endif
#endif
#endif
psock2->s_conn = psock1->s_conn; /* UDP or TCP connection structure */
#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
psock2->s_sndcb = NULL; /* Force allocation of new callback
* instance for TCP send */
#endif
/* Increment the reference count on the connection */
DEBUGASSERT(psock2->s_conn);
psock2->s_crefs = 1; /* One reference on the new socket itself */
#ifdef CONFIG_NET_TCP
if (psock2->s_type == SOCK_STREAM)
{
FAR struct tcp_conn_s *conn = psock2->s_conn;
DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
conn->crefs++;
}
else
#endif
#ifdef CONFIG_NET_UDP
if (psock2->s_type == SOCK_DGRAM)
{
FAR struct udp_conn_s *conn = psock2->s_conn;
DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
conn->crefs++;
}
else
#endif
{
ndbg("Unsupported type: %d\n", psock2->s_type);
ret = -EBADF;
}
uip_unlock(flags);
return ret;
}
#endif /* CONFIG_NET */
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