89 lines
3.0 KiB
C
89 lines
3.0 KiB
C
/****************************************************************************
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* net/socket/net_dup2.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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/socket.h>
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#include <string.h>
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#include <sched.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/tcp.h>
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#include "inet/inet.h"
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#include "tcp/tcp.h"
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#include "socket/socket.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: psock_dup2
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*
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* Description:
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* Performs the low level, common portion of dup
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*
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* Input Parameters:
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* psock1 - The existing socket that is being cloned.
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* psock2 - A reference to an uninitialized socket structure allocated by
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* the caller.
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*
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* Returned Value:
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* Zero (OK) is returned on success; a negated errno value is returned on
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* any failure.
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*
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****************************************************************************/
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int psock_dup2(FAR struct socket *psock1, FAR struct socket *psock2)
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{
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/* Parts of this operation need to be atomic */
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net_lock();
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/* Duplicate the relevant socket state (zeroing everything else) */
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memset(psock2, 0, sizeof(struct socket));
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psock2->s_domain = psock1->s_domain; /* IP domain: PF_INET, PF_INET6, or PF_PACKET */
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psock2->s_type = psock1->s_type; /* Protocol type: Only SOCK_STREAM or SOCK_DGRAM */
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psock2->s_sockif = psock1->s_sockif; /* Socket interface */
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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 underlying connection structure
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* for this address family type.
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*/
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DEBUGASSERT(psock2->s_sockif != NULL &&
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psock2->s_sockif->si_addref != NULL);
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psock2->s_sockif->si_addref(psock2);
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net_unlock();
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return OK;
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}
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