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58 lines
1.9 KiB
58 lines
1.9 KiB
/* |
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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(int 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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