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/*
* ngtcp2
*
* Copyright (c) 2024 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "ngtcp2_settings.h"
#include <string.h>
#include <assert.h>
#include "ngtcp2_unreachable.h"
void ngtcp2_settings_default_versioned(int settings_version,
ngtcp2_settings *settings) {
size_t len = ngtcp2_settingslen_version(settings_version);
memset(settings, 0, len);
switch (settings_version) {
case NGTCP2_SETTINGS_VERSION:
settings->glitch_ratelim_burst = NGTCP2_DEFAULT_GLITCH_RATELIM_BURST;
settings->glitch_ratelim_rate = NGTCP2_DEFAULT_GLITCH_RATELIM_RATE;
/* fall through */
case NGTCP2_SETTINGS_V2:
case NGTCP2_SETTINGS_V1:
settings->cc_algo = NGTCP2_CC_ALGO_CUBIC;
settings->initial_rtt = NGTCP2_DEFAULT_INITIAL_RTT;
settings->ack_thresh = 2;
settings->max_tx_udp_payload_size = 1500 - 48;
settings->handshake_timeout = UINT64_MAX;
break;
}
}
static void settings_copy(ngtcp2_settings *dest, const ngtcp2_settings *src,
int settings_version) {
assert(settings_version != NGTCP2_SETTINGS_VERSION);
memcpy(dest, src, ngtcp2_settingslen_version(settings_version));
}
const ngtcp2_settings *
ngtcp2_settings_convert_to_latest(ngtcp2_settings *dest, int settings_version,
const ngtcp2_settings *src) {
if (settings_version == NGTCP2_SETTINGS_VERSION) {
return src;
}
ngtcp2_settings_default(dest);
settings_copy(dest, src, settings_version);
return dest;
}
void ngtcp2_settings_convert_to_old(int settings_version, ngtcp2_settings *dest,
const ngtcp2_settings *src) {
assert(settings_version != NGTCP2_SETTINGS_VERSION);
settings_copy(dest, src, settings_version);
}
size_t ngtcp2_settingslen_version(int settings_version) {
ngtcp2_settings settings;
switch (settings_version) {
case NGTCP2_SETTINGS_VERSION:
return sizeof(settings);
case NGTCP2_SETTINGS_V2:
return offsetof(ngtcp2_settings, pmtud_probeslen) +
sizeof(settings.pmtud_probeslen);
case NGTCP2_SETTINGS_V1:
return offsetof(ngtcp2_settings, initial_pkt_num) +
sizeof(settings.initial_pkt_num);
default:
ngtcp2_unreachable();
}
}
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