| // Copyright 2021 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_router/static_router.h" |
| |
| #include <algorithm> |
| #include <mutex> |
| |
| namespace pw::router { |
| |
| Status StaticRouter::RoutePacket(ConstByteSpan packet) { |
| uint32_t address; |
| |
| { |
| // Only packet parsing is synchronized within the router; egresses must be |
| // synchronized externally. |
| std::lock_guard lock(mutex_); |
| |
| if (!parser_.Parse(packet)) { |
| parser_errors_.Increment(); |
| return Status::DataLoss(); |
| } |
| |
| std::optional<uint32_t> result = parser_.GetDestinationAddress(); |
| if (!result.has_value()) { |
| parser_errors_.Increment(); |
| return Status::DataLoss(); |
| } |
| |
| address = result.value(); |
| } |
| |
| auto route = std::find_if(routes_.begin(), routes_.end(), [&](auto r) { |
| return r.address == address; |
| }); |
| if (route == routes_.end()) { |
| route_errors_.Increment(); |
| return Status::NotFound(); |
| } |
| |
| if (Status status = route->egress.SendPacket(packet); !status.ok()) { |
| egress_errors_.Increment(); |
| return Status::Unavailable(); |
| } |
| |
| return OkStatus(); |
| } |
| |
| } // namespace pw::router |