86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/*
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* Author: Christian Huitema
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* Copyright (c) 2018, Private Octopus, Inc.
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* All rights reserved.
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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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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL Private Octopus, Inc. BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "picoquic_internal.h"
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#include "tls_api.h"
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#ifndef UNREFERENCED_PARAMETER
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#define UNREFERENCED_PARAMETER(x) (void)(x)
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#endif
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/*
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* Two procedures defining the spin bit basic variant
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*/
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void picoquic_spinbit_basic_incoming(picoquic_cnx_t * cnx, picoquic_path_t * path_x, picoquic_packet_header * ph)
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{
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path_x->current_spin = ph->spin ^ cnx->client_mode;
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}
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uint8_t picoquic_spinbit_basic_outgoing(picoquic_cnx_t * cnx)
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{
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uint8_t spin_bit = (uint8_t)((cnx->path[0]->current_spin) << 5);
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return spin_bit;
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}
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/*
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* Two procedures defining the null spin bit variant
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*/
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void picoquic_spinbit_null_incoming(picoquic_cnx_t * cnx, picoquic_path_t * path_x, picoquic_packet_header * ph)
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{
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UNREFERENCED_PARAMETER(cnx);
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UNREFERENCED_PARAMETER(path_x);
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UNREFERENCED_PARAMETER(ph);
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}
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uint8_t picoquic_spinbit_null_outgoing(picoquic_cnx_t * cnx)
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{
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UNREFERENCED_PARAMETER(cnx);
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return 0;
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}
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/*
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* Two procedures defining the null spin bit randomized variant
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*/
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void picoquic_spinbit_random_incoming(picoquic_cnx_t * cnx, picoquic_path_t * path_x, picoquic_packet_header * ph)
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{
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UNREFERENCED_PARAMETER(cnx);
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UNREFERENCED_PARAMETER(path_x);
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UNREFERENCED_PARAMETER(ph);
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}
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uint8_t picoquic_spinbit_random_outgoing(picoquic_cnx_t * cnx)
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{
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UNREFERENCED_PARAMETER(cnx);
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return (uint8_t) (picoquic_public_random_64()&0x20);
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}
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/*
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* Table of spin bit functions
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*/
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picoquic_spinbit_def_t picoquic_spin_function_table[] = {
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{picoquic_spinbit_basic_incoming, picoquic_spinbit_basic_outgoing},
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{picoquic_spinbit_random_incoming, picoquic_spinbit_random_outgoing},
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{picoquic_spinbit_null_incoming, picoquic_spinbit_null_outgoing}
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};
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