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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <hicn/transport/interfaces/socket_consumer.h>
#include <hicn/transport/utils/array.h>
#include <hicn/transport/utils/membuf.h>
#include <implementation/socket_consumer.h>
#include <protocols/errors.h>
#include <protocols/indexer.h>
#include <protocols/reassembly.h>
namespace transport {
namespace protocol {
void Reassembly::notifyApplication() {
interface::ConsumerSocket::ReadCallback *read_callback = nullptr;
reassembly_consumer_socket_->getSocketOption(
interface::ConsumerCallbacksOptions::READ_CALLBACK, &read_callback);
if (TRANSPORT_EXPECT_FALSE(!read_callback)) {
LOG(ERROR) << "Read callback not installed!";
return;
}
if (read_callback->isBufferMovable()) {
// No need to perform an additional copy. The whole buffer will be
// tranferred to the application.
read_callback->readBufferAvailable(std::move(read_buffer_));
read_buffer_ = utils::MemBuf::create(read_callback->maxBufferSize());
} else {
// The buffer will be copied into the application-provided buffer
uint8_t *buffer;
std::size_t length;
std::size_t total_length = read_buffer_->length();
while (read_buffer_->length()) {
buffer = nullptr;
length = 0;
read_callback->getReadBuffer(&buffer, &length);
if (!buffer || !length) {
throw errors::RuntimeException(
"Invalid buffer provided by the application.");
}
auto to_copy = std::min(read_buffer_->length(), length);
std::memcpy(buffer, read_buffer_->data(), to_copy);
read_buffer_->trimStart(to_copy);
}
read_callback->readDataAvailable(total_length);
read_buffer_->clear();
}
}
} // namespace protocol
} // namespace transport
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