mirror of
https://github.com/google/sandboxed-api.git
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87 lines
2.3 KiB
C++
87 lines
2.3 KiB
C++
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// Copyright 2019 Google LLC. All Rights Reserved.
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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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// http://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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#include "sandboxed_api/sandbox2/network_proxy_server.h"
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <syscall.h>
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#include <cerrno>
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#include <cstring>
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#include <glog/logging.h>
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#include "absl/memory/memory.h"
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#include "sandboxed_api/sandbox2/util/fileops.h"
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namespace sandbox2 {
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NetworkProxyServer::NetworkProxyServer(int fd)
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: comms_{absl::make_unique<Comms>(fd)}, fatal_error_{false} {}
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void NetworkProxyServer::ProcessConnectRequest() {
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std::vector<uint8_t> addr;
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if (!comms_->RecvBytes(&addr)) {
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fatal_error_ = true;
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return;
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}
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// Only sockaddr_in is supported.
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if (addr.size() != sizeof(sockaddr_in)) {
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SendResult(-1, EINVAL);
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return;
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}
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const struct sockaddr_in* saddr =
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reinterpret_cast<const sockaddr_in*>(addr.data());
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// Only IPv4 TCP and IPv6 TCP are supported.
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if (saddr->sin_family != AF_INET && saddr->sin_family != AF_INET6) {
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SendResult(-1, EINVAL);
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return;
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}
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int new_socket = socket(saddr->sin_family, SOCK_STREAM, 0);
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file_util::fileops::FDCloser new_socket_closer(new_socket);
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int result = connect(
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new_socket, reinterpret_cast<const sockaddr*>(addr.data()), addr.size());
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SendResult(result, errno);
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if (result == 0 && !fatal_error_) {
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if (!comms_->SendFD(new_socket)) {
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fatal_error_ = true;
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return;
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}
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}
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}
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void NetworkProxyServer::Run() {
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while (!fatal_error_) {
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ProcessConnectRequest();
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}
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LOG(INFO)
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<< "Clean shutdown or error occurred, shutting down NetworkProxyServer";
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}
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void NetworkProxyServer::SendResult(int result, int saved_errno) {
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if (!comms_->SendInt32(result == 0 ? result : saved_errno)) {
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fatal_error_ = true;
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}
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}
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} // namespace sandbox2
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