| // Copyright 2020 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. |
| |
| // This function serves as a backend for pw_tokenizer / pw_log_tokenized that |
| // encodes tokenized logs as Base64 and writes them using HDLC. |
| |
| #include "pw_log_tokenized/base64_over_hdlc.h" |
| |
| #include "pw_hdlc/encoder.h" |
| #include "pw_span/span.h" |
| #include "pw_stream/sys_io_stream.h" |
| #include "pw_tokenizer/base64.h" |
| #include "pw_tokenizer/tokenize_to_global_handler_with_payload.h" |
| |
| namespace pw::log_tokenized { |
| namespace { |
| |
| stream::SysIoWriter writer; |
| |
| } // namespace |
| |
| // Base64-encodes tokenized logs and writes them to pw::sys_io as HDLC frames. |
| extern "C" void pw_tokenizer_HandleEncodedMessageWithPayload( |
| pw_tokenizer_Payload, // TODO(hepler): Use the metadata for filtering. |
| const uint8_t log_buffer[], |
| size_t size_bytes) { |
| // Encode the tokenized message as Base64. |
| char base64_buffer[tokenizer::kDefaultBase64EncodedBufferSize]; |
| const size_t base64_bytes = tokenizer::PrefixedBase64Encode( |
| span(log_buffer, size_bytes), base64_buffer); |
| base64_buffer[base64_bytes] = '\0'; |
| |
| // HDLC-encode the Base64 string via a SysIoWriter. |
| hdlc::WriteUIFrame(PW_LOG_TOKENIZED_BASE64_LOG_HDLC_ADDRESS, |
| as_bytes(span(base64_buffer, base64_bytes)), |
| writer); |
| } |
| |
| } // namespace pw::log_tokenized |