59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
|
/*
|
||
|
|
* Copyright (C) 2016 The Android Open Source Project
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "sysdeps.h"
|
||
|
|
|
||
|
|
bool set_tcp_keepalive(int fd, int interval_sec) {
|
||
|
|
int enable = (interval_sec > 0);
|
||
|
|
if (adb_setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &enable, sizeof(enable))) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!enable) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Idle time before sending the first keepalive is TCP_KEEPIDLE on Linux, TCP_KEEPALIVE on Mac.
|
||
|
|
#if defined(TCP_KEEPIDLE)
|
||
|
|
if (adb_setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &interval_sec, sizeof(interval_sec))) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
#elif defined(TCP_KEEPALIVE)
|
||
|
|
if (adb_setsockopt(fd, IPPROTO_TCP, TCP_KEEPALIVE, &interval_sec, sizeof(interval_sec))) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// TCP_KEEPINTVL and TCP_KEEPCNT are available on Linux 2.4+ and OS X 10.8+ (Mountain Lion).
|
||
|
|
#if defined(TCP_KEEPINTVL)
|
||
|
|
if (adb_setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL, &interval_sec, sizeof(interval_sec))) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(TCP_KEEPCNT)
|
||
|
|
// On Windows this value is hardcoded to 10. This is a reasonable value, so we do the same here
|
||
|
|
// to match behavior. See SO_KEEPALIVE documentation at
|
||
|
|
// https://msdn.microsoft.com/en-us/library/windows/desktop/ee470551(v=vs.85).aspx.
|
||
|
|
const int keepcnt = 10;
|
||
|
|
if (adb_setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT, &keepcnt, sizeof(keepcnt))) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|