93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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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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*/
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#include "sysdeps.h"
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bool set_tcp_keepalive(borrowed_fd fd, int interval_sec) {
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int enable = (interval_sec > 0);
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if (adb_setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &enable, sizeof(enable))) {
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return false;
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}
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if (!enable) {
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return true;
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}
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// Idle time before sending the first keepalive is TCP_KEEPIDLE on Linux, TCP_KEEPALIVE on Mac.
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#if defined(TCP_KEEPIDLE)
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if (adb_setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &interval_sec, sizeof(interval_sec))) {
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return false;
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}
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#elif defined(TCP_KEEPALIVE)
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if (adb_setsockopt(fd, IPPROTO_TCP, TCP_KEEPALIVE, &interval_sec, sizeof(interval_sec))) {
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return false;
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}
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#endif
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// TCP_KEEPINTVL and TCP_KEEPCNT are available on Linux 2.4+ and OS X 10.8+ (Mountain Lion).
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#if defined(TCP_KEEPINTVL)
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if (adb_setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &interval_sec, sizeof(interval_sec))) {
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return false;
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}
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#endif
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#if defined(TCP_KEEPCNT)
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// On Windows this value is hardcoded to 10. This is a reasonable value, so we do the same here
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// to match behavior. See SO_KEEPALIVE documentation at
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ee470551(v=vs.85).aspx.
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const int keepcnt = 10;
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if (adb_setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &keepcnt, sizeof(keepcnt))) {
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return false;
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}
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#endif
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return true;
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}
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static __inline__ void disable_close_on_exec(borrowed_fd fd) {
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const auto oldFlags = fcntl(fd.get(), F_GETFD);
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const auto newFlags = (oldFlags & ~FD_CLOEXEC);
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if (newFlags != oldFlags) {
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fcntl(fd.get(), F_SETFD, newFlags);
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}
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}
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Process adb_launch_process(std::string_view executable, std::vector<std::string> args,
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std::initializer_list<int> fds_to_inherit) {
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const auto pid = fork();
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if (pid != 0) {
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// parent, includes the case when failed to fork()
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return Process(pid);
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}
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// child
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std::vector<std::string> copies;
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copies.reserve(args.size() + 1);
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copies.emplace_back(executable);
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copies.insert(copies.end(), std::make_move_iterator(args.begin()),
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std::make_move_iterator(args.end()));
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std::vector<char*> rawArgs;
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rawArgs.reserve(copies.size() + 1);
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for (auto&& str : copies) {
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rawArgs.push_back(str.data());
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}
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rawArgs.push_back(nullptr);
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for (auto fd : fds_to_inherit) {
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disable_close_on_exec(fd);
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}
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exit(execv(copies.front().data(), rawArgs.data()));
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}
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