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73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
// Copyright 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of 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,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SANDBOXED_API_SANDBOX2_NETWORK_PROXY_SERVER_H_
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#define SANDBOXED_API_SANDBOX2_NETWORK_PROXY_SERVER_H_
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#include <pthread.h>
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#include <atomic>
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#include <memory>
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#include <string>
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#include "sandboxed_api/sandbox2/comms.h"
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#include "sandboxed_api/sandbox2/network_proxy/filtering.h"
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namespace sandbox2 {
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// This is a proxy server that spawns connected sockets on requests.
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// Then it sends the file descriptor to the requestor. It is used to get around
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// limitations created by network namespaces. It also contains a set of rules
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// of allowed hosts.
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class NetworkProxyServer {
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public:
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NetworkProxyServer(int fd, AllowedHosts* allowed_hosts,
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pthread_t monitor_thread_id);
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NetworkProxyServer(const NetworkProxyServer&) = delete;
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NetworkProxyServer& operator=(const NetworkProxyServer&) = delete;
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// Starts handling incoming connection requests.
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void Run();
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// When the network rules were violated violation_occurred_ is set and
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// violation_msg_ contains details about the host.
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std::atomic<bool> violation_occurred_;
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std::string violation_msg_;
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private:
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// Notifies the network proxy client about the error and sends its code.
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void SendError(int saved_errno);
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// Notifies the network proxy client that no error occurred.
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void NotifySuccess();
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// Serves connection requests from the network proxy client.
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void ProcessConnectRequest();
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// Throw a violation when the network rules are subverted.
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void NotifyViolation(const struct sockaddr* saddr);
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std::unique_ptr<Comms> comms_;
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bool fatal_error_;
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pthread_t monitor_thread_id_;
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// Contains list of allowed to connect hosts.
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AllowedHosts* allowed_hosts_;
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};
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} // namespace sandbox2
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#endif // SANDBOXED_API_SANDBOX2_NETWORK_PROXY_SERVER_H_
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