71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
/****************************************************************************
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* net/socket/net_checksd.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 <sched.h>
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#include <errno.h>
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#include <debug.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: net_checksd
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*
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* Description:
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* Check if the socket descriptor is valid for the provided TCB and if it
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* supports the requested access. This trivial operation is part of the
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* fdopen() operation when the fdopen() is performed on a socket
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* descriptor. It simply performs some sanity checking before permitting
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* the socket descriptor to be wrapped as a C FILE stream.
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*
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****************************************************************************/
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int net_checksd(int sd, int oflags)
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{
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FAR struct socket *psock = sockfd_socket(sd);
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/* Verify that the sockfd corresponds to valid, allocated socket */
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if (!psock || psock->s_crefs <= 0)
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{
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ninfo("No valid socket for sd: %d\n", sd);
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return -EBADF;
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}
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/* NOTE: We permit the socket FD to be "wrapped" in a stream as
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* soon as the socket descriptor is created by socket(). Therefore
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* (1) we don't care if the socket is connected yet, and (2) there
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* are no access restrictions that can be enforced yet.
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*/
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return OK;
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}
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