133 lines
3.5 KiB
C++
133 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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