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52 lines
1.8 KiB
52 lines
1.8 KiB
// Copyright 2020 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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// This function serves as a backend for pw_tokenizer / pw_log_tokenized that
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// encodes tokenized logs as Base64 and writes them using HDLC.
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#include "pw_log_tokenized/base64_over_hdlc.h"
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#include <span>
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#include "pw_hdlc/encoder.h"
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#include "pw_stream/sys_io_stream.h"
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#include "pw_tokenizer/base64.h"
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#include "pw_tokenizer/tokenize_to_global_handler_with_payload.h"
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namespace pw::log_tokenized {
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namespace {
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stream::SysIoWriter writer;
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} // namespace
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// Base64-encodes tokenized logs and writes them to pw::sys_io as HDLC frames.
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extern "C" void pw_tokenizer_HandleEncodedMessageWithPayload(
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pw_tokenizer_Payload, // TODO(hepler): Use the metadata for filtering.
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const uint8_t log_buffer[],
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size_t size_bytes) {
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// Encode the tokenized message as Base64.
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char base64_buffer[tokenizer::kDefaultBase64EncodedBufferSize];
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const size_t base64_bytes = tokenizer::PrefixedBase64Encode(
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std::span(log_buffer, size_bytes), base64_buffer);
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base64_buffer[base64_bytes] = '\0';
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// HDLC-encode the Base64 string via a SysIoWriter.
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hdlc::WriteUIFrame(PW_LOG_TOKENIZED_BASE64_LOG_HDLC_ADDRESS,
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std::as_bytes(std::span(base64_buffer, base64_bytes)),
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writer);
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}
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} // namespace pw::log_tokenized
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