1 /*
   2  * Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.  Oracle designates this
   9  * particular file as subject to the "Classpath" exception as provided
  10  * by Oracle in the LICENSE file that accompanied this code.
  11  *
  12  * This code is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * version 2 for more details (a copy is included in the LICENSE file that
  16  * accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License version
  19  * 2 along with this work; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  21  *
  22  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  23  * or visit www.oracle.com if you need additional information or have any
  24  * questions.
  25  *
  26  */
  27 @@END_COPYRIGHT@@
  28 
  29 #include <stdio.h>
  30 #ifdef _WIN32
  31 #include <winsock2.h>
  32 #include <ws2tcpip.h>
  33 #else
  34 #include <sys/types.h>
  35 #include <sys/socket.h>
  36 #include <netinet/in.h>
  37 #include <netinet/tcp.h>
  38 #endif
  39 
  40 /* Defines SO_REUSEPORT */
  41 #if !defined(SO_REUSEPORT)
  42 #ifdef _WIN32
  43 #define SO_REUSEPORT 0
  44 #elif __linux__
  45 #define SO_REUSEPORT 15
  46 #elif __solaris__
  47 #define SO_REUSEPORT 0x100e
  48 #elif defined(AIX) || defined(MACOSX)
  49 #define SO_REUSEPORT 0x0200
  50 #else
  51 #define SO_REUSEPORT 0
  52 #endif
  53 #endif
  54 
  55 /* On Solaris, "sun" is defined as a macro. Undefine to make package
  56    declaration valid */
  57 #undef sun
  58 
  59 /* To be able to name the Java constants the same as the C constants without
  60    having the preprocessor rewrite those identifiers, add PREFIX_ to all
  61    identifiers matching a C constant. The PREFIX_ is filtered out in the
  62    makefile. */
  63 
  64 @@START_HERE@@
  65 
  66 package sun.nio.ch;
  67 import java.net.SocketOption;
  68 import java.net.StandardSocketOptions;
  69 import java.net.ProtocolFamily;
  70 import java.net.StandardProtocolFamily;
  71 import java.util.Map;
  72 import java.util.HashMap;
  73 class SocketOptionRegistry {
  74 
  75     private SocketOptionRegistry() { }
  76 
  77     private static class RegistryKey {
  78         private final SocketOption<?> name;
  79         private final ProtocolFamily family;
  80         RegistryKey(SocketOption<?> name, ProtocolFamily family) {
  81             this.name = name;
  82             this.family = family;
  83         }
  84         public int hashCode() {
  85             return name.hashCode() + family.hashCode();
  86         }
  87         public boolean equals(Object ob) {
  88             if (ob == null) return false;
  89             if (!(ob instanceof RegistryKey)) return false;
  90             RegistryKey other = (RegistryKey)ob;
  91             if (this.name != other.name) return false;
  92             if (this.family != other.family) return false;
  93             return true;
  94         }
  95     }
  96 
  97     private static class LazyInitialization {
  98 
  99         static final Map<RegistryKey,OptionKey> options = options();
 100 
 101         private static Map<RegistryKey,OptionKey> options() {
 102             Map<RegistryKey,OptionKey> map =
 103                 new HashMap<RegistryKey,OptionKey>();
 104             map.put(new RegistryKey(StandardSocketOptions.PREFIX_SO_BROADCAST, Net.UNSPEC),
 105                     new OptionKey(SOL_SOCKET, SO_BROADCAST));
 106             map.put(new RegistryKey(StandardSocketOptions.PREFIX_SO_KEEPALIVE, Net.UNSPEC),
 107                     new OptionKey(SOL_SOCKET, SO_KEEPALIVE));
 108             map.put(new RegistryKey(StandardSocketOptions.PREFIX_SO_LINGER, Net.UNSPEC),
 109                     new OptionKey(SOL_SOCKET, SO_LINGER));
 110             map.put(new RegistryKey(StandardSocketOptions.PREFIX_SO_SNDBUF, Net.UNSPEC),
 111                     new OptionKey(SOL_SOCKET, SO_SNDBUF));
 112             map.put(new RegistryKey(StandardSocketOptions.PREFIX_SO_RCVBUF, Net.UNSPEC),
 113                     new OptionKey(SOL_SOCKET, SO_RCVBUF));
 114             map.put(new RegistryKey(StandardSocketOptions.PREFIX_SO_REUSEADDR, Net.UNSPEC),
 115                     new OptionKey(SOL_SOCKET, SO_REUSEADDR));
 116             map.put(new RegistryKey(StandardSocketOptions.PREFIX_SO_REUSEPORT, Net.UNSPEC),
 117                     new OptionKey(SOL_SOCKET, SO_REUSEPORT));
 118             // IPPROTO_TCP is 6
 119             map.put(new RegistryKey(StandardSocketOptions.PREFIX_TCP_NODELAY, Net.UNSPEC),
 120                     new OptionKey(6, TCP_NODELAY));
 121 
 122             // IPPROTO_IP is 0
 123             map.put(new RegistryKey(StandardSocketOptions.PREFIX_IP_TOS, StandardProtocolFamily.INET),
 124                     new OptionKey(0, IP_TOS));
 125             map.put(new RegistryKey(StandardSocketOptions.PREFIX_IP_MULTICAST_IF, StandardProtocolFamily.INET),
 126                     new OptionKey(0, IP_MULTICAST_IF));
 127             map.put(new RegistryKey(StandardSocketOptions.PREFIX_IP_MULTICAST_TTL, StandardProtocolFamily.INET),
 128                     new OptionKey(0, IP_MULTICAST_TTL));
 129             map.put(new RegistryKey(StandardSocketOptions.PREFIX_IP_MULTICAST_LOOP, StandardProtocolFamily.INET),
 130                     new OptionKey(0, IP_MULTICAST_LOOP));
 131 
 132 #ifdef AF_INET6
 133             // IPPROTO_IPV6 is 41
 134             map.put(new RegistryKey(StandardSocketOptions.PREFIX_IP_TOS, StandardProtocolFamily.INET6),
 135                     new OptionKey(41, IPV6_TCLASS));
 136             map.put(new RegistryKey(StandardSocketOptions.PREFIX_IP_MULTICAST_IF, StandardProtocolFamily.INET6),
 137                     new OptionKey(41, IPV6_MULTICAST_IF));
 138             map.put(new RegistryKey(StandardSocketOptions.PREFIX_IP_MULTICAST_TTL, StandardProtocolFamily.INET6),
 139                     new OptionKey(41, IPV6_MULTICAST_HOPS));
 140             map.put(new RegistryKey(StandardSocketOptions.PREFIX_IP_MULTICAST_LOOP, StandardProtocolFamily.INET6),
 141                     new OptionKey(41, IPV6_MULTICAST_LOOP));
 142 #endif
 143 
 144             map.put(new RegistryKey(ExtendedSocketOption.PREFIX_SO_OOBINLINE, Net.UNSPEC),
 145                     new OptionKey(SOL_SOCKET, SO_OOBINLINE));
 146             return map;
 147         }
 148     }
 149 
 150     public static OptionKey findOption(SocketOption<?> name, ProtocolFamily family) {
 151         RegistryKey key = new RegistryKey(name, family);
 152         return LazyInitialization.options.get(key);
 153     }
 154 }