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88 lines
3.4 KiB
88 lines
3.4 KiB
/**************************************************************************** |
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* net/net_checksd.c |
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* |
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* Copyright (C) 2011 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr> |
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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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#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 "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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* 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 descriptor. |
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* It simply performs some sanity checking before permitting the socket |
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* descriptor to be wrapped as a C FILE stream. |
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* |
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****************************************************************************/ |
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#if defined(CONFIG_NET) && CONFIG_NFILE_DESCRIPTORS > 0 |
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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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nvdbg("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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#endif /* CONIG_NET && CONFIG_NFILE_DESCRIPTORS > 0 */ |
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