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      1 /*
      2  * Copyright (C) 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "netdutils/SocketOption.h"
     18 
     19 #include <netinet/in.h>
     20 #include <netinet/tcp.h>
     21 #include <sys/socket.h>
     22 #include <utility>
     23 
     24 #include "netdutils/Syscalls.h"
     25 
     26 namespace android {
     27 namespace netdutils {
     28 
     29 Status enableSockopt(Fd sock, int level, int optname) {
     30     auto& sys = sSyscalls.get();
     31     const int on = 1;
     32     return sys.setsockopt(sock, level, optname, &on, sizeof(on));
     33 }
     34 
     35 Status enableTcpKeepAlives(Fd sock, unsigned idleTime, unsigned numProbes, unsigned probeInterval) {
     36     RETURN_IF_NOT_OK(enableSockopt(sock, SOL_SOCKET, SO_KEEPALIVE));
     37 
     38     auto& sys = sSyscalls.get();
     39     if (idleTime != 0) {
     40         RETURN_IF_NOT_OK(sys.setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, &idleTime, sizeof(idleTime)));
     41     }
     42     if (numProbes != 0) {
     43         RETURN_IF_NOT_OK(sys.setsockopt(sock, SOL_TCP, TCP_KEEPCNT, &numProbes, sizeof(numProbes)));
     44     }
     45     if (probeInterval != 0) {
     46         RETURN_IF_NOT_OK(sys.setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, &probeInterval,
     47                 sizeof(probeInterval)));
     48     }
     49 
     50     return status::ok;
     51 }
     52 
     53 }  // namespace netdutils
     54 }  // namespace android
     55