2b72262b4f
I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
132 lines
3.5 KiB
C++
132 lines
3.5 KiB
C++
/*
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* Copyright (c) 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* sockopt.cpp
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* getsockopt() and setsockopt() utility functions.
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*/
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#include <errno.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <sortix/kernel/ioctx.h>
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#include <sortix/kernel/sockopt.h>
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namespace Sortix {
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bool sockopt_fetch_uintmax(uintmax_t* optval_ptr, ioctx_t* ctx,
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const void* option_value, size_t option_size)
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{
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uintmax_t optval;
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if ( option_size == 0 )
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{
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optval = 0;
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}
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else if ( option_size == 1 )
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{
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uint8_t truncated;
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if ( !ctx->copy_from_src(&truncated, option_value, sizeof(truncated)) )
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return false;
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optval = truncated;
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}
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else if ( option_size == 2 )
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{
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uint16_t truncated;
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if ( !ctx->copy_from_src(&truncated, option_value, sizeof(truncated)) )
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return false;
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optval = truncated;
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}
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else if ( option_size == 4 )
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{
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uint32_t truncated;
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if ( !ctx->copy_from_src(&truncated, option_value, sizeof(truncated)) )
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return false;
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optval = truncated;
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}
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else if ( option_size == 8 )
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{
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uint64_t truncated;
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if ( !ctx->copy_from_src(&truncated, option_value, sizeof(truncated)) )
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return false;
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optval = truncated;
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}
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#if UINT64_MAX < UINTMAX_MAX
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#error "Add support for your large uintmax_t"
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#endif
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else
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{
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return errno = EINVAL, false;
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}
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return *optval_ptr = optval, true;
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}
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bool sockopt_return_uintmax(uintmax_t optval, ioctx_t* ctx,
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void* option_value, size_t* option_size_ptr)
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{
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size_t option_size;
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if ( !ctx->copy_from_src(&option_size, option_size_ptr, sizeof(option_size)) )
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return false;
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if ( /*0 <= option_size &&*/ option_size < 1 )
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{
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option_size = 0;
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}
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else if ( 1 <= option_size && option_size < 2 )
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{
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if ( UINT8_MAX < optval )
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return errno = ERANGE, false;
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uint8_t value = optval;
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option_size = sizeof(value);
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if ( !ctx->copy_to_dest(option_value, &value, sizeof(value)) )
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return false;
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}
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else if ( 2 <= option_size && option_size < 4 )
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{
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if ( UINT16_MAX < optval )
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return errno = ERANGE, false;
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uint16_t value = optval;
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option_size = sizeof(value);
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if ( !ctx->copy_to_dest(option_value, &value, sizeof(value)) )
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return false;
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}
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else if ( 4 <= option_size && option_size < 8 )
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{
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if ( UINT32_MAX < optval )
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return errno = ERANGE, false;
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uint32_t value = optval;
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option_size = sizeof(value);
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if ( !ctx->copy_to_dest(option_value, &value, sizeof(value)) )
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return false;
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}
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else if ( 8 <= option_size /* && option_size < 16 */ )
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{
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#if UINT64_MAX < UINTMAX_MAX
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#error "Add support for your large uintmax_t"
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#endif
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uint64_t value = optval;
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option_size = sizeof(value);
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if ( !ctx->copy_to_dest(option_value, &value, sizeof(value)) )
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return false;
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}
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if ( !ctx->copy_to_dest(option_size_ptr, &option_size, sizeof(option_size)) )
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return false;
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return true;
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}
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} // namespace Sortix
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