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initial commit 2019-09-07 14:03:22 +04:00 • committed by vvaltman
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overlay/overlay-fec.cpp Normal file
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/*
This file is part of TON Blockchain Library.
TON Blockchain Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
TON Blockchain Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
Copyright 2017-2019 Telegram Systems LLP
*/
#include "overlay-fec.hpp"
#include "overlay.hpp"
#include "adnl/utils.hpp"
namespace ton {
namespace overlay {
void OverlayOutboundFecBroadcast::alarm() {
for (td::uint32 i = 0; i < 4; i++) {
auto X = encoder_->gen_symbol(seqno_++);
CHECK(X.data.size() <= 1000);
td::actor::send_closure(overlay_, &OverlayImpl::send_new_fec_broadcast_part, local_id_, data_hash_,
fec_type_.size(), flags_, std::move(X.data), X.id, fec_type_, date_);
}
alarm_timestamp() = td::Timestamp::in(0.010);
if (seqno_ >= to_send_) {
stop();
}
}
void OverlayOutboundFecBroadcast::start_up() {
encoder_->prepare_more_symbols();
alarm();
}
OverlayOutboundFecBroadcast::OverlayOutboundFecBroadcast(td::BufferSlice data, td::uint32 flags,
td::actor::ActorId<OverlayImpl> overlay,
PublicKeyHash local_id)
: flags_(flags) {
CHECK(data.size() <= (1 << 27));
local_id_ = local_id;
overlay_ = std::move(overlay);
date_ = static_cast<td::int32>(td::Clocks::system());
to_send_ = (static_cast<td::uint32>(data.size()) / symbol_size_ + 1) * 2;
data_hash_ = td::sha256_bits256(data);
fec_type_ = td::fec::RaptorQEncoder::Parameters{data.size(), symbol_size_, 0};
auto E = fec_type_.create_encoder(std::move(data));
E.ensure();
encoder_ = E.move_as_ok();
}
td::actor::ActorId<OverlayOutboundFecBroadcast> OverlayOutboundFecBroadcast::create(
td::BufferSlice data, td::uint32 flags, td::actor::ActorId<OverlayImpl> overlay, PublicKeyHash local_id) {
return td::actor::create_actor<OverlayOutboundFecBroadcast>(td::actor::ActorOptions().with_name("bcast"),
std::move(data), flags, overlay, local_id)
.release();
}
} // namespace overlay
} // namespace ton