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https://fuchsia.googlesource.com/third_party/pigweed.googlesource.com/pigweed/pigweed
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da401abdfd
This removes all log statements from the static router. This is done as there is no guarantee for what pw_log backend is used. In some systems, logs may flow directly through the router, resulting in recursive calls that cause a crash. The user of the router can choose to check and log its return values if the operation is safe. Change-Id: I3a94d9245fde8fd5d27a23ddd1713aba1e880bd8 Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/33621 Reviewed-by: Wyatt Hepler <hepler@google.com> Commit-Queue: Alexei Frolov <frolv@google.com>
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
// Copyright 2021 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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#include "pw_router/static_router.h"
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#include <algorithm>
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#include <mutex>
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namespace pw::router {
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Status StaticRouter::RoutePacket(ConstByteSpan packet) {
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uint32_t address;
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{
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// Only packet parsing is synchronized within the router; egresses must be
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// synchronized externally.
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std::lock_guard lock(mutex_);
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if (!parser_.Parse(packet)) {
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parser_errors_.Increment();
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return Status::DataLoss();
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}
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std::optional<uint32_t> result = parser_.GetDestinationAddress();
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if (!result.has_value()) {
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parser_errors_.Increment();
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return Status::DataLoss();
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}
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address = result.value();
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}
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auto route = std::find_if(routes_.begin(), routes_.end(), [&](auto r) {
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return r.address == address;
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});
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if (route == routes_.end()) {
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route_errors_.Increment();
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return Status::NotFound();
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}
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if (Status status = route->egress.SendPacket(packet); !status.ok()) {
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egress_errors_.Increment();
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return Status::Unavailable();
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}
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return OkStatus();
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}
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} // namespace pw::router
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