140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
/****************************************************************************
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* fs/socket/socketpair.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 <nuttx/kmalloc.h>
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#include <nuttx/net/net.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/mm/mm.h>
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#include <sys/socket.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <debug.h>
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#include "inode/inode.h"
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#include "fs_heap.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: socketpair
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*
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* Description:
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* Create an unbound pair of connected sockets in a specified domain, of a
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* specified type, under the protocol optionally specified by the protocol
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* argument. The two sockets shall be identical. The file descriptors used
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* in referencing the created sockets shall be returned in
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* sv[0] and sv[1].
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*
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* Input Parameters:
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* domain - (see sys/socket.h)
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* type - (see sys/socket.h)
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* protocol - (see sys/socket.h)
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* sv[2] - The user provided array in which to catch the pair
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* descriptors
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*
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****************************************************************************/
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int socketpair(int domain, int type, int protocol, int sv[2])
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{
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FAR struct socket *psocks[2];
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int oflags = O_RDWR;
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int ret;
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int i;
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int j = 0;
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int k;
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if (sv == NULL)
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{
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ret = -EINVAL;
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goto errout;
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}
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for (k = 0; k < 2; k++)
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{
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psocks[k] = fs_heap_zalloc(sizeof(*psocks[k]));
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if (psocks[k] == NULL)
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{
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ret = -ENOMEM;
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goto errout_with_alloc;
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}
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}
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ret = psock_socketpair(domain, type, protocol, psocks);
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if (ret < 0)
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{
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goto errout_with_alloc;
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}
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if (type & SOCK_CLOEXEC)
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{
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oflags |= O_CLOEXEC;
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}
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if (type & SOCK_NONBLOCK)
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{
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oflags |= O_NONBLOCK;
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}
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/* Allocate a socket descriptor */
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for (; j < 2; j++)
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{
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sv[j] = sockfd_allocate(psocks[j], oflags);
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if (sv[j] < 0)
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{
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ret = sv[j];
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goto errout_with_psock;
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}
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}
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return OK;
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errout_with_psock:
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for (i = 0; i < j; i++)
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{
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nx_close(sv[i]);
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}
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for (i = j; i < k; i++)
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{
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psock_close(psocks[i]);
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}
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errout_with_alloc:
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for (i = j; i < k; i++)
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{
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fs_heap_free(psocks[i]);
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}
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errout:
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set_errno(-ret);
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return ERROR;
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}
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