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// Copyright 2022 The Pigweed Authors
//
// 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
//
// https://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 "pw_transfer/transfer.h"
#include "pw_assert/check.h"
#include "pw_log/log.h"
#include "pw_status/try.h"
#include "pw_transfer/internal/chunk.h"
namespace pw::transfer {
void TransferService::HandleChunk(ConstByteSpan message,
internal::TransferType type) {
Result<internal::Chunk> chunk = internal::Chunk::Parse(message);
if (!chunk.ok()) {
PW_LOG_ERROR("Failed to decode transfer chunk: %d", chunk.status().code());
return;
}
if (chunk->IsInitialChunk()) {
uint32_t resource_id =
chunk->is_legacy() ? chunk->session_id() : chunk->resource_id().value();
uint32_t session_id;
if (chunk->is_legacy()) {
session_id = chunk->session_id();
} else if (chunk->desired_session_id().has_value()) {
session_id = chunk->desired_session_id().value();
} else {
// Non-legacy start chunks are required to use desired_session_id.
thread_.SendServerStatus(type,
chunk->session_id(),
chunk->protocol_version(),
Status::DataLoss());
return;
}
thread_.StartServerTransfer(type,
chunk->protocol_version(),
session_id,
resource_id,
message,
max_parameters_,
chunk_timeout_,
max_retries_,
max_lifetime_retries_);
} else {
thread_.ProcessServerChunk(message);
}
}
} // namespace pw::transfer
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