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177b969e8c
PiperOrigin-RevId: 238996664 Change-Id: I9646527e2be68ee0b6b371572b7aafe967102e57 Signed-off-by: Christian Blichmann <cblichmann@google.com>
95 lines
2.9 KiB
C++
95 lines
2.9 KiB
C++
// 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_client.h"
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#include <cerrno>
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#include <iostream>
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#include <glog/logging.h>
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#include "absl/strings/str_cat.h"
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#include "sandboxed_api/sandbox2/util/strerror.h"
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#include "sandboxed_api/util/canonical_errors.h"
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#include "sandboxed_api/util/status.h"
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#include "sandboxed_api/util/status_macros.h"
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namespace sandbox2 {
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constexpr char NetworkProxyClient::kFDName[];
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int NetworkProxyClient::ConnectHandler(int sockfd, const struct sockaddr* addr,
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socklen_t addrlen) {
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sapi::Status status = Connect(sockfd, addr, addrlen);
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if (status.ok()) {
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return 0;
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}
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PLOG(ERROR) << "ConnectHandler() failed: " << status.message();
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return -1;
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}
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sapi::Status NetworkProxyClient::Connect(int sockfd,
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const struct sockaddr* addr,
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socklen_t addrlen) {
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absl::MutexLock lock(&mutex_);
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// Check if socket is SOCK_STREAM
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int type;
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socklen_t type_size = sizeof(int);
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int result = getsockopt(sockfd, SOL_SOCKET, SO_TYPE, &type, &type_size);
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if (result == -1) {
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return sapi::FailedPreconditionError("Invalid socket FD");
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}
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if (type_size != sizeof(int) || type != SOCK_STREAM) {
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errno = EINVAL;
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return sapi::InvalidArgumentError(
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"Invalid socket, only SOCK_STREAM is allowed");
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}
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// Send sockaddr struct
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if (!comms_.SendBytes(reinterpret_cast<const uint8_t*>(addr), addrlen)) {
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errno = EIO;
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return sapi::InternalError("Sending data to network proxy failed");
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}
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SAPI_RETURN_IF_ERROR(ReceiveRemoteResult());
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// Receive new socket
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int s;
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if (!comms_.RecvFD(&s)) {
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errno = EIO;
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return sapi::InternalError("Receiving data from network proxy failed");
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}
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if (dup2(s, sockfd) == -1) {
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close(s);
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return sapi::InternalError("Processing data from network proxy failed");
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}
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return sapi::OkStatus();
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}
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sapi::Status NetworkProxyClient::ReceiveRemoteResult() {
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int result;
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if (!comms_.RecvInt32(&result)) {
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errno = EIO;
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return sapi::InternalError("Receiving data from the network proxy failed");
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}
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if (result != 0) {
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errno = result;
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return sapi::InternalError(
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absl::StrCat("Error in network proxy: ", StrError(errno)));
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}
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return sapi::OkStatus();
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}
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} // namespace sandbox2
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