1 /*
   2  * Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package jdk.net;
  26 
  27 import java.net.SocketException;
  28 import java.nio.file.attribute.UserPrincipal;
  29 import java.nio.file.attribute.GroupPrincipal;
  30 import java.security.AccessController;
  31 import java.security.PrivilegedAction;
  32 import jdk.net.ExtendedSocketOptions.PlatformSocketOptions;
  33 import sun.nio.fs.UnixUserGroupUtil;
  34 
  35 class LinuxSocketOptions extends PlatformSocketOptions {
  36 
  37     public LinuxSocketOptions() {
  38     }
  39 
  40     @Override
  41     void setQuickAck(int fd, boolean on) throws SocketException {
  42         setQuickAck0(fd, on);
  43     }
  44 
  45     @Override
  46     boolean getQuickAck(int fd) throws SocketException {
  47         return getQuickAck0(fd);
  48     }
  49 
  50     @Override
  51     public boolean quickAckSupported() {
  52         return quickAckSupported0();
  53     }
  54 
  55     @Override
  56     boolean keepAliveOptionsSupported() {
  57         return keepAliveOptionsSupported0();
  58     }
  59 
  60     boolean peerCredentialsSupported() {
  61         return true;
  62     }
  63 
  64     @Override
  65     void setTcpkeepAliveProbes(int fd, final int value) throws SocketException {
  66         setTcpkeepAliveProbes0(fd, value);
  67     }
  68 
  69     @Override
  70     void setTcpKeepAliveTime(int fd, final int value) throws SocketException {
  71         setTcpKeepAliveTime0(fd, value);
  72     }
  73 
  74     @Override
  75     void setTcpKeepAliveIntvl(int fd, final int value) throws SocketException {
  76         setTcpKeepAliveIntvl0(fd, value);
  77     }
  78 
  79     @Override
  80     int getTcpkeepAliveProbes(int fd) throws SocketException {
  81         return getTcpkeepAliveProbes0(fd);
  82     }
  83 
  84     @Override
  85     int getTcpKeepAliveTime(int fd) throws SocketException {
  86         return getTcpKeepAliveTime0(fd);
  87     }
  88 
  89     @Override
  90     int getTcpKeepAliveIntvl(int fd) throws SocketException {
  91         return getTcpKeepAliveIntvl0(fd);
  92     }
  93 
  94     @Override
  95     boolean incomingNapiIdSupported() {
  96         return incomingNapiIdSupported0();
  97     }
  98 
  99     @Override
 100     int getIncomingNapiId(int fd) throws SocketException {
 101         return getIncomingNapiId0(fd);
 102     }
 103 
 104 
 105     @Override
 106     UnixDomainPrincipal getSoPeerCred(int fd) throws SocketException {
 107         int[] result = new int[2];
 108 
 109         getSoPeerCred0(fd, result);
 110         UserPrincipal user = UnixUserGroupUtil.fromUid(result[0]);
 111         GroupPrincipal group = UnixUserGroupUtil.fromGid(result[1]);
 112         return new UnixDomainPrincipal(user, group);
 113     }
 114 
 115     private static native void setTcpkeepAliveProbes0(int fd, int value) throws SocketException;
 116     private static native void setTcpKeepAliveTime0(int fd, int value) throws SocketException;
 117     private static native void setTcpKeepAliveIntvl0(int fd, int value) throws SocketException;
 118     private static native int getTcpkeepAliveProbes0(int fd) throws SocketException;
 119     private static native int getTcpKeepAliveTime0(int fd) throws SocketException;
 120     private static native int getTcpKeepAliveIntvl0(int fd) throws SocketException;
 121     private static native void setQuickAck0(int fd, boolean on) throws SocketException;
 122     private static native boolean getQuickAck0(int fd) throws SocketException;
 123     private static native void getSoPeerCred0(int fd, int[] result) throws SocketException;
 124     private static native boolean keepAliveOptionsSupported0();
 125     private static native boolean quickAckSupported0();
 126     private static native boolean incomingNapiIdSupported0();
 127     private static native int getIncomingNapiId0(int fd) throws SocketException;
 128     static {
 129         if (System.getSecurityManager() == null) {
 130             System.loadLibrary("extnet");
 131         } else {
 132             AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
 133                 System.loadLibrary("extnet");
 134                 return null;
 135             });
 136         }
 137     }
 138 }
 139