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119 lines
4.0 KiB
119 lines
4.0 KiB
/**************************************************************************** |
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* net/net_clone.c |
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* |
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* Copyright (C) 2009, 2011-2012 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 "net_internal.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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uip_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 = uip_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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#endif |
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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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#endif |
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psock2->s_conn = psock1->s_conn; /* UDP or TCP connection structure */ |
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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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struct uip_conn *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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struct uip_udp_conn *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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uip_unlock(flags); |
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return ret; |
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} |
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#endif /* CONFIG_NET */ |
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