author | michaelm |
Mon, 30 May 2011 23:36:10 +0100 | |
changeset 9775 | 1b128726e887 |
parent 9550 | c3a275ce56d3 |
child 10882 | 7ddadf2b8b4c |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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7033660: Update copyright year to 2011 on any files changed in 2011
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* Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.net; |
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||
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import java.util.HashMap; |
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import java.util.LinkedHashMap; |
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import java.util.Random; |
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import java.util.Iterator; |
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import java.util.LinkedList; |
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import java.util.List; |
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import java.util.ArrayList; |
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import java.security.AccessController; |
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import java.io.ObjectStreamException; |
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import java.io.IOException; |
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6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
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import java.io.ObjectInputStream; |
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import sun.security.action.*; |
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import sun.net.InetAddressCachePolicy; |
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import sun.net.util.IPAddressUtil; |
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import sun.misc.Service; |
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import sun.net.spi.nameservice.*; |
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||
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/** |
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* This class represents an Internet Protocol (IP) address. |
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* |
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* <p> An IP address is either a 32-bit or 128-bit unsigned number |
|
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* used by IP, a lower-level protocol on which protocols like UDP and |
|
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* TCP are built. The IP address architecture is defined by <a |
|
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* href="http://www.ietf.org/rfc/rfc790.txt"><i>RFC 790: |
|
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* Assigned Numbers</i></a>, <a |
|
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* href="http://www.ietf.org/rfc/rfc1918.txt"> <i>RFC 1918: |
|
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* Address Allocation for Private Internets</i></a>, <a |
|
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* href="http://www.ietf.org/rfc/rfc2365.txt"><i>RFC 2365: |
|
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* Administratively Scoped IP Multicast</i></a>, and <a |
|
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* href="http://www.ietf.org/rfc/rfc2373.txt"><i>RFC 2373: IP |
|
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* Version 6 Addressing Architecture</i></a>. An instance of an |
|
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* InetAddress consists of an IP address and possibly its |
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* corresponding host name (depending on whether it is constructed |
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* with a host name or whether it has already done reverse host name |
|
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* resolution). |
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* |
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* <h4> Address types </h4> |
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* |
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* <blockquote><table cellspacing=2 summary="Description of unicast and multicast address types"> |
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* <tr><th valign=top><i>unicast</i></th> |
|
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* <td>An identifier for a single interface. A packet sent to |
|
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* a unicast address is delivered to the interface identified by |
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* that address. |
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* |
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* <p> The Unspecified Address -- Also called anylocal or wildcard |
|
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* address. It must never be assigned to any node. It indicates the |
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* absence of an address. One example of its use is as the target of |
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* bind, which allows a server to accept a client connection on any |
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* interface, in case the server host has multiple interfaces. |
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* |
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* <p> The <i>unspecified</i> address must not be used as |
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* the destination address of an IP packet. |
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* |
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* <p> The <i>Loopback</i> Addresses -- This is the address |
|
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* assigned to the loopback interface. Anything sent to this |
|
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* IP address loops around and becomes IP input on the local |
|
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* host. This address is often used when testing a |
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* client.</td></tr> |
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* <tr><th valign=top><i>multicast</i></th> |
|
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* <td>An identifier for a set of interfaces (typically belonging |
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* to different nodes). A packet sent to a multicast address is |
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* delivered to all interfaces identified by that address.</td></tr> |
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* </table></blockquote> |
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* |
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* <h4> IP address scope </h4> |
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* |
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* <p> <i>Link-local</i> addresses are designed to be used for addressing |
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* on a single link for purposes such as auto-address configuration, |
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* neighbor discovery, or when no routers are present. |
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* |
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* <p> <i>Site-local</i> addresses are designed to be used for addressing |
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* inside of a site without the need for a global prefix. |
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* |
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* <p> <i>Global</i> addresses are unique across the internet. |
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* |
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* <h4> Textual representation of IP addresses </h4> |
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* |
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* The textual representation of an IP address is address family specific. |
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* |
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* <p> |
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* |
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* For IPv4 address format, please refer to <A |
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* HREF="Inet4Address.html#format">Inet4Address#format</A>; For IPv6 |
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* address format, please refer to <A |
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* HREF="Inet6Address.html#format">Inet6Address#format</A>. |
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* |
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* <P>There is a <a href="doc-files/net-properties.html#Ipv4IPv6">couple of |
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* System Properties</a> affecting how IPv4 and IPv6 addresses are used.</P> |
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* |
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* <h4> Host Name Resolution </h4> |
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* |
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* Host name-to-IP address <i>resolution</i> is accomplished through |
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* the use of a combination of local machine configuration information |
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* and network naming services such as the Domain Name System (DNS) |
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* and Network Information Service(NIS). The particular naming |
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* services(s) being used is by default the local machine configured |
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* one. For any host name, its corresponding IP address is returned. |
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* |
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* <p> <i>Reverse name resolution</i> means that for any IP address, |
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* the host associated with the IP address is returned. |
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* |
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* <p> The InetAddress class provides methods to resolve host names to |
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* their IP addresses and vice versa. |
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* |
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* <h4> InetAddress Caching </h4> |
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* |
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* The InetAddress class has a cache to store successful as well as |
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* unsuccessful host name resolutions. |
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* |
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* <p> By default, when a security manager is installed, in order to |
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* protect against DNS spoofing attacks, |
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* the result of positive host name resolutions are |
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* cached forever. When a security manager is not installed, the default |
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* behavior is to cache entries for a finite (implementation dependent) |
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* period of time. The result of unsuccessful host |
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* name resolution is cached for a very short period of time (10 |
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* seconds) to improve performance. |
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* |
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* <p> If the default behavior is not desired, then a Java security property |
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* can be set to a different Time-to-live (TTL) value for positive |
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* caching. Likewise, a system admin can configure a different |
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* negative caching TTL value when needed. |
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* |
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* <p> Two Java security properties control the TTL values used for |
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* positive and negative host name resolution caching: |
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* |
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* <blockquote> |
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* <dl> |
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* <dt><b>networkaddress.cache.ttl</b></dt> |
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* <dd>Indicates the caching policy for successful name lookups from |
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* the name service. The value is specified as as integer to indicate |
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* the number of seconds to cache the successful lookup. The default |
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* setting is to cache for an implementation specific period of time. |
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* <p> |
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* A value of -1 indicates "cache forever". |
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* </dd> |
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* <p> |
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* <dt><b>networkaddress.cache.negative.ttl</b> (default: 10)</dt> |
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* <dd>Indicates the caching policy for un-successful name lookups |
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* from the name service. The value is specified as as integer to |
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* indicate the number of seconds to cache the failure for |
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* un-successful lookups. |
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* <p> |
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* A value of 0 indicates "never cache". |
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* A value of -1 indicates "cache forever". |
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* </dd> |
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* </dl> |
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* </blockquote> |
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* |
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* @author Chris Warth |
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* @see java.net.InetAddress#getByAddress(byte[]) |
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* @see java.net.InetAddress#getByAddress(java.lang.String, byte[]) |
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* @see java.net.InetAddress#getAllByName(java.lang.String) |
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* @see java.net.InetAddress#getByName(java.lang.String) |
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* @see java.net.InetAddress#getLocalHost() |
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* @since JDK1.0 |
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*/ |
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public |
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class InetAddress implements java.io.Serializable { |
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/** |
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* Specify the address family: Internet Protocol, Version 4 |
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* @since 1.4 |
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*/ |
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static final int IPv4 = 1; |
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||
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/** |
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* Specify the address family: Internet Protocol, Version 6 |
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* @since 1.4 |
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*/ |
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static final int IPv6 = 2; |
|
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||
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/* Specify address family preference */ |
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static transient boolean preferIPv6Address = false; |
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||
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/** |
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* @serial |
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*/ |
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String hostName; |
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||
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/** |
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* Holds a 32-bit IPv4 address. |
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* |
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* @serial |
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*/ |
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int address; |
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||
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/** |
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* Specifies the address family type, for instance, '1' for IPv4 |
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* addresses, and '2' for IPv6 addresses. |
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* |
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* @serial |
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*/ |
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int family; |
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/* Used to store the name service provider */ |
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private static List<NameService> nameServices = null; |
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/* Used to store the best available hostname */ |
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private transient String canonicalHostName = null; |
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||
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/** use serialVersionUID from JDK 1.0.2 for interoperability */ |
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private static final long serialVersionUID = 3286316764910316507L; |
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||
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/* |
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* Load net library into runtime, and perform initializations. |
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*/ |
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static { |
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preferIPv6Address = java.security.AccessController.doPrivileged( |
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new GetBooleanAction("java.net.preferIPv6Addresses")).booleanValue(); |
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AccessController.doPrivileged(new LoadLibraryAction("net")); |
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init(); |
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} |
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||
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/** |
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* Constructor for the Socket.accept() method. |
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* This creates an empty InetAddress, which is filled in by |
|
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* the accept() method. This InetAddress, however, is not |
|
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* put in the address cache, since it is not created by name. |
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*/ |
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InetAddress() { |
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} |
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||
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/** |
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* Replaces the de-serialized object with an Inet4Address object. |
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* |
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* @return the alternate object to the de-serialized object. |
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* |
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* @throws ObjectStreamException if a new object replacing this |
|
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* object could not be created |
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*/ |
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private Object readResolve() throws ObjectStreamException { |
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// will replace the deserialized 'this' object |
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return new Inet4Address(this.hostName, this.address); |
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} |
|
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||
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/** |
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* Utility routine to check if the InetAddress is an |
|
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* IP multicast address. |
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* @return a <code>boolean</code> indicating if the InetAddress is |
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* an IP multicast address |
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* @since JDK1.1 |
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*/ |
|
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public boolean isMulticastAddress() { |
|
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return false; |
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} |
|
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||
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/** |
|
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* Utility routine to check if the InetAddress in a wildcard address. |
|
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* @return a <code>boolean</code> indicating if the Inetaddress is |
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* a wildcard address. |
|
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* @since 1.4 |
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*/ |
|
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public boolean isAnyLocalAddress() { |
|
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return false; |
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} |
|
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||
284 |
/** |
|
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* Utility routine to check if the InetAddress is a loopback address. |
|
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* |
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* @return a <code>boolean</code> indicating if the InetAddress is |
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* a loopback address; or false otherwise. |
|
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* @since 1.4 |
|
290 |
*/ |
|
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public boolean isLoopbackAddress() { |
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return false; |
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} |
|
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||
295 |
/** |
|
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* Utility routine to check if the InetAddress is an link local address. |
|
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* |
|
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* @return a <code>boolean</code> indicating if the InetAddress is |
|
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* a link local address; or false if address is not a link local unicast address. |
|
300 |
* @since 1.4 |
|
301 |
*/ |
|
302 |
public boolean isLinkLocalAddress() { |
|
303 |
return false; |
|
304 |
} |
|
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||
306 |
/** |
|
307 |
* Utility routine to check if the InetAddress is a site local address. |
|
308 |
* |
|
309 |
* @return a <code>boolean</code> indicating if the InetAddress is |
|
310 |
* a site local address; or false if address is not a site local unicast address. |
|
311 |
* @since 1.4 |
|
312 |
*/ |
|
313 |
public boolean isSiteLocalAddress() { |
|
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return false; |
|
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} |
|
316 |
||
317 |
/** |
|
318 |
* Utility routine to check if the multicast address has global scope. |
|
319 |
* |
|
320 |
* @return a <code>boolean</code> indicating if the address has |
|
321 |
* is a multicast address of global scope, false if it is not |
|
322 |
* of global scope or it is not a multicast address |
|
323 |
* @since 1.4 |
|
324 |
*/ |
|
325 |
public boolean isMCGlobal() { |
|
326 |
return false; |
|
327 |
} |
|
328 |
||
329 |
/** |
|
330 |
* Utility routine to check if the multicast address has node scope. |
|
331 |
* |
|
332 |
* @return a <code>boolean</code> indicating if the address has |
|
333 |
* is a multicast address of node-local scope, false if it is not |
|
334 |
* of node-local scope or it is not a multicast address |
|
335 |
* @since 1.4 |
|
336 |
*/ |
|
337 |
public boolean isMCNodeLocal() { |
|
338 |
return false; |
|
339 |
} |
|
340 |
||
341 |
/** |
|
342 |
* Utility routine to check if the multicast address has link scope. |
|
343 |
* |
|
344 |
* @return a <code>boolean</code> indicating if the address has |
|
345 |
* is a multicast address of link-local scope, false if it is not |
|
346 |
* of link-local scope or it is not a multicast address |
|
347 |
* @since 1.4 |
|
348 |
*/ |
|
349 |
public boolean isMCLinkLocal() { |
|
350 |
return false; |
|
351 |
} |
|
352 |
||
353 |
/** |
|
354 |
* Utility routine to check if the multicast address has site scope. |
|
355 |
* |
|
356 |
* @return a <code>boolean</code> indicating if the address has |
|
357 |
* is a multicast address of site-local scope, false if it is not |
|
358 |
* of site-local scope or it is not a multicast address |
|
359 |
* @since 1.4 |
|
360 |
*/ |
|
361 |
public boolean isMCSiteLocal() { |
|
362 |
return false; |
|
363 |
} |
|
364 |
||
365 |
/** |
|
366 |
* Utility routine to check if the multicast address has organization scope. |
|
367 |
* |
|
368 |
* @return a <code>boolean</code> indicating if the address has |
|
369 |
* is a multicast address of organization-local scope, |
|
370 |
* false if it is not of organization-local scope |
|
371 |
* or it is not a multicast address |
|
372 |
* @since 1.4 |
|
373 |
*/ |
|
374 |
public boolean isMCOrgLocal() { |
|
375 |
return false; |
|
376 |
} |
|
377 |
||
378 |
||
379 |
/** |
|
380 |
* Test whether that address is reachable. Best effort is made by the |
|
381 |
* implementation to try to reach the host, but firewalls and server |
|
382 |
* configuration may block requests resulting in a unreachable status |
|
383 |
* while some specific ports may be accessible. |
|
384 |
* A typical implementation will use ICMP ECHO REQUESTs if the |
|
385 |
* privilege can be obtained, otherwise it will try to establish |
|
386 |
* a TCP connection on port 7 (Echo) of the destination host. |
|
387 |
* <p> |
|
388 |
* The timeout value, in milliseconds, indicates the maximum amount of time |
|
389 |
* the try should take. If the operation times out before getting an |
|
390 |
* answer, the host is deemed unreachable. A negative value will result |
|
391 |
* in an IllegalArgumentException being thrown. |
|
392 |
* |
|
393 |
* @param timeout the time, in milliseconds, before the call aborts |
|
394 |
* @return a <code>boolean</code> indicating if the address is reachable. |
|
395 |
* @throws IOException if a network error occurs |
|
396 |
* @throws IllegalArgumentException if <code>timeout</code> is negative. |
|
397 |
* @since 1.5 |
|
398 |
*/ |
|
399 |
public boolean isReachable(int timeout) throws IOException { |
|
400 |
return isReachable(null, 0 , timeout); |
|
401 |
} |
|
402 |
||
403 |
/** |
|
404 |
* Test whether that address is reachable. Best effort is made by the |
|
405 |
* implementation to try to reach the host, but firewalls and server |
|
406 |
* configuration may block requests resulting in a unreachable status |
|
407 |
* while some specific ports may be accessible. |
|
408 |
* A typical implementation will use ICMP ECHO REQUESTs if the |
|
409 |
* privilege can be obtained, otherwise it will try to establish |
|
410 |
* a TCP connection on port 7 (Echo) of the destination host. |
|
411 |
* <p> |
|
412 |
* The <code>network interface</code> and <code>ttl</code> parameters |
|
413 |
* let the caller specify which network interface the test will go through |
|
414 |
* and the maximum number of hops the packets should go through. |
|
415 |
* A negative value for the <code>ttl</code> will result in an |
|
416 |
* IllegalArgumentException being thrown. |
|
417 |
* <p> |
|
418 |
* The timeout value, in milliseconds, indicates the maximum amount of time |
|
419 |
* the try should take. If the operation times out before getting an |
|
420 |
* answer, the host is deemed unreachable. A negative value will result |
|
421 |
* in an IllegalArgumentException being thrown. |
|
422 |
* |
|
423 |
* @param netif the NetworkInterface through which the |
|
424 |
* test will be done, or null for any interface |
|
425 |
* @param ttl the maximum numbers of hops to try or 0 for the |
|
426 |
* default |
|
427 |
* @param timeout the time, in milliseconds, before the call aborts |
|
428 |
* @throws IllegalArgumentException if either <code>timeout</code> |
|
429 |
* or <code>ttl</code> are negative. |
|
430 |
* @return a <code>boolean</code>indicating if the address is reachable. |
|
431 |
* @throws IOException if a network error occurs |
|
432 |
* @since 1.5 |
|
433 |
*/ |
|
434 |
public boolean isReachable(NetworkInterface netif, int ttl, |
|
435 |
int timeout) throws IOException { |
|
436 |
if (ttl < 0) |
|
437 |
throw new IllegalArgumentException("ttl can't be negative"); |
|
438 |
if (timeout < 0) |
|
439 |
throw new IllegalArgumentException("timeout can't be negative"); |
|
440 |
||
441 |
return impl.isReachable(this, timeout, netif, ttl); |
|
442 |
} |
|
443 |
||
444 |
/** |
|
445 |
* Gets the host name for this IP address. |
|
446 |
* |
|
447 |
* <p>If this InetAddress was created with a host name, |
|
448 |
* this host name will be remembered and returned; |
|
449 |
* otherwise, a reverse name lookup will be performed |
|
450 |
* and the result will be returned based on the system |
|
451 |
* configured name lookup service. If a lookup of the name service |
|
452 |
* is required, call |
|
453 |
* {@link #getCanonicalHostName() getCanonicalHostName}. |
|
454 |
* |
|
455 |
* <p>If there is a security manager, its |
|
456 |
* <code>checkConnect</code> method is first called |
|
457 |
* with the hostname and <code>-1</code> |
|
458 |
* as its arguments to see if the operation is allowed. |
|
459 |
* If the operation is not allowed, it will return |
|
460 |
* the textual representation of the IP address. |
|
461 |
* |
|
462 |
* @return the host name for this IP address, or if the operation |
|
463 |
* is not allowed by the security check, the textual |
|
464 |
* representation of the IP address. |
|
465 |
* |
|
466 |
* @see InetAddress#getCanonicalHostName |
|
467 |
* @see SecurityManager#checkConnect |
|
468 |
*/ |
|
469 |
public String getHostName() { |
|
470 |
return getHostName(true); |
|
471 |
} |
|
472 |
||
473 |
/** |
|
474 |
* Returns the hostname for this address. |
|
475 |
* If the host is equal to null, then this address refers to any |
|
476 |
* of the local machine's available network addresses. |
|
477 |
* this is package private so SocketPermission can make calls into |
|
478 |
* here without a security check. |
|
479 |
* |
|
480 |
* <p>If there is a security manager, this method first |
|
481 |
* calls its <code>checkConnect</code> method |
|
482 |
* with the hostname and <code>-1</code> |
|
483 |
* as its arguments to see if the calling code is allowed to know |
|
484 |
* the hostname for this IP address, i.e., to connect to the host. |
|
485 |
* If the operation is not allowed, it will return |
|
486 |
* the textual representation of the IP address. |
|
487 |
* |
|
488 |
* @return the host name for this IP address, or if the operation |
|
489 |
* is not allowed by the security check, the textual |
|
490 |
* representation of the IP address. |
|
491 |
* |
|
492 |
* @param check make security check if true |
|
493 |
* |
|
494 |
* @see SecurityManager#checkConnect |
|
495 |
*/ |
|
496 |
String getHostName(boolean check) { |
|
497 |
if (hostName == null) { |
|
498 |
hostName = InetAddress.getHostFromNameService(this, check); |
|
499 |
} |
|
500 |
return hostName; |
|
501 |
} |
|
502 |
||
503 |
/** |
|
504 |
* Gets the fully qualified domain name for this IP address. |
|
505 |
* Best effort method, meaning we may not be able to return |
|
506 |
* the FQDN depending on the underlying system configuration. |
|
507 |
* |
|
508 |
* <p>If there is a security manager, this method first |
|
509 |
* calls its <code>checkConnect</code> method |
|
510 |
* with the hostname and <code>-1</code> |
|
511 |
* as its arguments to see if the calling code is allowed to know |
|
512 |
* the hostname for this IP address, i.e., to connect to the host. |
|
513 |
* If the operation is not allowed, it will return |
|
514 |
* the textual representation of the IP address. |
|
515 |
* |
|
516 |
* @return the fully qualified domain name for this IP address, |
|
517 |
* or if the operation is not allowed by the security check, |
|
518 |
* the textual representation of the IP address. |
|
519 |
* |
|
520 |
* @see SecurityManager#checkConnect |
|
521 |
* |
|
522 |
* @since 1.4 |
|
523 |
*/ |
|
524 |
public String getCanonicalHostName() { |
|
525 |
if (canonicalHostName == null) { |
|
526 |
canonicalHostName = |
|
527 |
InetAddress.getHostFromNameService(this, true); |
|
528 |
} |
|
529 |
return canonicalHostName; |
|
530 |
} |
|
531 |
||
532 |
/** |
|
533 |
* Returns the hostname for this address. |
|
534 |
* |
|
535 |
* <p>If there is a security manager, this method first |
|
536 |
* calls its <code>checkConnect</code> method |
|
537 |
* with the hostname and <code>-1</code> |
|
538 |
* as its arguments to see if the calling code is allowed to know |
|
539 |
* the hostname for this IP address, i.e., to connect to the host. |
|
540 |
* If the operation is not allowed, it will return |
|
541 |
* the textual representation of the IP address. |
|
542 |
* |
|
543 |
* @return the host name for this IP address, or if the operation |
|
544 |
* is not allowed by the security check, the textual |
|
545 |
* representation of the IP address. |
|
546 |
* |
|
547 |
* @param check make security check if true |
|
548 |
* |
|
549 |
* @see SecurityManager#checkConnect |
|
550 |
*/ |
|
551 |
private static String getHostFromNameService(InetAddress addr, boolean check) { |
|
552 |
String host = null; |
|
553 |
for (NameService nameService : nameServices) { |
|
554 |
try { |
|
555 |
// first lookup the hostname |
|
556 |
host = nameService.getHostByAddr(addr.getAddress()); |
|
557 |
||
558 |
/* check to see if calling code is allowed to know |
|
559 |
* the hostname for this IP address, ie, connect to the host |
|
560 |
*/ |
|
561 |
if (check) { |
|
562 |
SecurityManager sec = System.getSecurityManager(); |
|
563 |
if (sec != null) { |
|
564 |
sec.checkConnect(host, -1); |
|
565 |
} |
|
566 |
} |
|
567 |
||
568 |
/* now get all the IP addresses for this hostname, |
|
569 |
* and make sure one of them matches the original IP |
|
570 |
* address. We do this to try and prevent spoofing. |
|
571 |
*/ |
|
572 |
||
573 |
InetAddress[] arr = InetAddress.getAllByName0(host, check); |
|
574 |
boolean ok = false; |
|
575 |
||
576 |
if(arr != null) { |
|
577 |
for(int i = 0; !ok && i < arr.length; i++) { |
|
578 |
ok = addr.equals(arr[i]); |
|
579 |
} |
|
580 |
} |
|
581 |
||
582 |
//XXX: if it looks a spoof just return the address? |
|
583 |
if (!ok) { |
|
584 |
host = addr.getHostAddress(); |
|
585 |
return host; |
|
586 |
} |
|
587 |
||
588 |
break; |
|
589 |
||
590 |
} catch (SecurityException e) { |
|
591 |
host = addr.getHostAddress(); |
|
592 |
break; |
|
593 |
} catch (UnknownHostException e) { |
|
594 |
host = addr.getHostAddress(); |
|
595 |
// let next provider resolve the hostname |
|
596 |
} |
|
597 |
} |
|
598 |
||
599 |
return host; |
|
600 |
} |
|
601 |
||
602 |
/** |
|
603 |
* Returns the raw IP address of this <code>InetAddress</code> |
|
604 |
* object. The result is in network byte order: the highest order |
|
605 |
* byte of the address is in <code>getAddress()[0]</code>. |
|
606 |
* |
|
607 |
* @return the raw IP address of this object. |
|
608 |
*/ |
|
609 |
public byte[] getAddress() { |
|
610 |
return null; |
|
611 |
} |
|
612 |
||
613 |
/** |
|
614 |
* Returns the IP address string in textual presentation. |
|
615 |
* |
|
616 |
* @return the raw IP address in a string format. |
|
617 |
* @since JDK1.0.2 |
|
618 |
*/ |
|
619 |
public String getHostAddress() { |
|
620 |
return null; |
|
621 |
} |
|
622 |
||
623 |
/** |
|
624 |
* Returns a hashcode for this IP address. |
|
625 |
* |
|
626 |
* @return a hash code value for this IP address. |
|
627 |
*/ |
|
628 |
public int hashCode() { |
|
629 |
return -1; |
|
630 |
} |
|
631 |
||
632 |
/** |
|
633 |
* Compares this object against the specified object. |
|
634 |
* The result is <code>true</code> if and only if the argument is |
|
635 |
* not <code>null</code> and it represents the same IP address as |
|
636 |
* this object. |
|
637 |
* <p> |
|
638 |
* Two instances of <code>InetAddress</code> represent the same IP |
|
639 |
* address if the length of the byte arrays returned by |
|
640 |
* <code>getAddress</code> is the same for both, and each of the |
|
641 |
* array components is the same for the byte arrays. |
|
642 |
* |
|
643 |
* @param obj the object to compare against. |
|
644 |
* @return <code>true</code> if the objects are the same; |
|
645 |
* <code>false</code> otherwise. |
|
646 |
* @see java.net.InetAddress#getAddress() |
|
647 |
*/ |
|
648 |
public boolean equals(Object obj) { |
|
649 |
return false; |
|
650 |
} |
|
651 |
||
652 |
/** |
|
653 |
* Converts this IP address to a <code>String</code>. The |
|
654 |
* string returned is of the form: hostname / literal IP |
|
655 |
* address. |
|
656 |
* |
|
657 |
* If the host name is unresolved, no reverse name service lookup |
|
658 |
* is performed. The hostname part will be represented by an empty string. |
|
659 |
* |
|
660 |
* @return a string representation of this IP address. |
|
661 |
*/ |
|
662 |
public String toString() { |
|
663 |
return ((hostName != null) ? hostName : "") |
|
664 |
+ "/" + getHostAddress(); |
|
665 |
} |
|
666 |
||
667 |
/* |
|
668 |
* Cached addresses - our own litle nis, not! |
|
669 |
*/ |
|
670 |
private static Cache addressCache = new Cache(Cache.Type.Positive); |
|
671 |
||
672 |
private static Cache negativeCache = new Cache(Cache.Type.Negative); |
|
673 |
||
674 |
private static boolean addressCacheInit = false; |
|
675 |
||
676 |
static InetAddress[] unknown_array; // put THIS in cache |
|
677 |
||
678 |
static InetAddressImpl impl; |
|
679 |
||
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
680 |
private static final HashMap<String, Void> lookupTable = new HashMap<>(); |
2 | 681 |
|
682 |
/** |
|
683 |
* Represents a cache entry |
|
684 |
*/ |
|
685 |
static final class CacheEntry { |
|
686 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
687 |
CacheEntry(InetAddress[] addresses, long expiration) { |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
688 |
this.addresses = addresses; |
2 | 689 |
this.expiration = expiration; |
690 |
} |
|
691 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
692 |
InetAddress[] addresses; |
2 | 693 |
long expiration; |
694 |
} |
|
695 |
||
696 |
/** |
|
697 |
* A cache that manages entries based on a policy specified |
|
698 |
* at creation time. |
|
699 |
*/ |
|
700 |
static final class Cache { |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
701 |
private LinkedHashMap<String, CacheEntry> cache; |
2 | 702 |
private Type type; |
703 |
||
704 |
enum Type {Positive, Negative}; |
|
705 |
||
706 |
/** |
|
707 |
* Create cache |
|
708 |
*/ |
|
709 |
public Cache(Type type) { |
|
710 |
this.type = type; |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
711 |
cache = new LinkedHashMap<String, CacheEntry>(); |
2 | 712 |
} |
713 |
||
714 |
private int getPolicy() { |
|
715 |
if (type == Type.Positive) { |
|
716 |
return InetAddressCachePolicy.get(); |
|
717 |
} else { |
|
718 |
return InetAddressCachePolicy.getNegative(); |
|
719 |
} |
|
720 |
} |
|
721 |
||
722 |
/** |
|
723 |
* Add an entry to the cache. If there's already an |
|
724 |
* entry then for this host then the entry will be |
|
725 |
* replaced. |
|
726 |
*/ |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
727 |
public Cache put(String host, InetAddress[] addresses) { |
2 | 728 |
int policy = getPolicy(); |
729 |
if (policy == InetAddressCachePolicy.NEVER) { |
|
730 |
return this; |
|
731 |
} |
|
732 |
||
733 |
// purge any expired entries |
|
734 |
||
735 |
if (policy != InetAddressCachePolicy.FOREVER) { |
|
736 |
||
737 |
// As we iterate in insertion order we can |
|
738 |
// terminate when a non-expired entry is found. |
|
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
739 |
LinkedList<String> expired = new LinkedList<>(); |
2 | 740 |
long now = System.currentTimeMillis(); |
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
741 |
for (String key : cache.keySet()) { |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
742 |
CacheEntry entry = cache.get(key); |
2 | 743 |
|
744 |
if (entry.expiration >= 0 && entry.expiration < now) { |
|
745 |
expired.add(key); |
|
746 |
} else { |
|
747 |
break; |
|
748 |
} |
|
749 |
} |
|
750 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
751 |
for (String key : expired) { |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
752 |
cache.remove(key); |
2 | 753 |
} |
754 |
} |
|
755 |
||
756 |
// create new entry and add it to the cache |
|
757 |
// -- as a HashMap replaces existing entries we |
|
758 |
// don't need to explicitly check if there is |
|
759 |
// already an entry for this host. |
|
760 |
long expiration; |
|
761 |
if (policy == InetAddressCachePolicy.FOREVER) { |
|
762 |
expiration = -1; |
|
763 |
} else { |
|
764 |
expiration = System.currentTimeMillis() + (policy * 1000); |
|
765 |
} |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
766 |
CacheEntry entry = new CacheEntry(addresses, expiration); |
2 | 767 |
cache.put(host, entry); |
768 |
return this; |
|
769 |
} |
|
770 |
||
771 |
/** |
|
772 |
* Query the cache for the specific host. If found then |
|
773 |
* return its CacheEntry, or null if not found. |
|
774 |
*/ |
|
775 |
public CacheEntry get(String host) { |
|
776 |
int policy = getPolicy(); |
|
777 |
if (policy == InetAddressCachePolicy.NEVER) { |
|
778 |
return null; |
|
779 |
} |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
780 |
CacheEntry entry = cache.get(host); |
2 | 781 |
|
782 |
// check if entry has expired |
|
783 |
if (entry != null && policy != InetAddressCachePolicy.FOREVER) { |
|
784 |
if (entry.expiration >= 0 && |
|
785 |
entry.expiration < System.currentTimeMillis()) { |
|
786 |
cache.remove(host); |
|
787 |
entry = null; |
|
788 |
} |
|
789 |
} |
|
790 |
||
791 |
return entry; |
|
792 |
} |
|
793 |
} |
|
794 |
||
795 |
/* |
|
796 |
* Initialize cache and insert anyLocalAddress into the |
|
797 |
* unknown array with no expiry. |
|
798 |
*/ |
|
799 |
private static void cacheInitIfNeeded() { |
|
800 |
assert Thread.holdsLock(addressCache); |
|
801 |
if (addressCacheInit) { |
|
802 |
return; |
|
803 |
} |
|
804 |
unknown_array = new InetAddress[1]; |
|
805 |
unknown_array[0] = impl.anyLocalAddress(); |
|
806 |
||
807 |
addressCache.put(impl.anyLocalAddress().getHostName(), |
|
808 |
unknown_array); |
|
809 |
||
810 |
addressCacheInit = true; |
|
811 |
} |
|
812 |
||
813 |
/* |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
814 |
* Cache the given hostname and addresses. |
2 | 815 |
*/ |
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
816 |
private static void cacheAddresses(String hostname, |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
817 |
InetAddress[] addresses, |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
818 |
boolean success) { |
2 | 819 |
hostname = hostname.toLowerCase(); |
820 |
synchronized (addressCache) { |
|
821 |
cacheInitIfNeeded(); |
|
822 |
if (success) { |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
823 |
addressCache.put(hostname, addresses); |
2 | 824 |
} else { |
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
825 |
negativeCache.put(hostname, addresses); |
2 | 826 |
} |
827 |
} |
|
828 |
} |
|
829 |
||
830 |
/* |
|
831 |
* Lookup hostname in cache (positive & negative cache). If |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
832 |
* found return addresses, null if not found. |
2 | 833 |
*/ |
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
834 |
private static InetAddress[] getCachedAddresses(String hostname) { |
2 | 835 |
hostname = hostname.toLowerCase(); |
836 |
||
837 |
// search both positive & negative caches |
|
838 |
||
839 |
synchronized (addressCache) { |
|
840 |
cacheInitIfNeeded(); |
|
841 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
842 |
CacheEntry entry = addressCache.get(hostname); |
2 | 843 |
if (entry == null) { |
844 |
entry = negativeCache.get(hostname); |
|
845 |
} |
|
846 |
||
847 |
if (entry != null) { |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
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parents:
5506
diff
changeset
|
848 |
return entry.addresses; |
2 | 849 |
} |
850 |
} |
|
851 |
||
852 |
// not found |
|
853 |
return null; |
|
854 |
} |
|
855 |
||
856 |
private static NameService createNSProvider(String provider) { |
|
857 |
if (provider == null) |
|
858 |
return null; |
|
859 |
||
860 |
NameService nameService = null; |
|
861 |
if (provider.equals("default")) { |
|
862 |
// initialize the default name service |
|
863 |
nameService = new NameService() { |
|
864 |
public InetAddress[] lookupAllHostAddr(String host) |
|
865 |
throws UnknownHostException { |
|
866 |
return impl.lookupAllHostAddr(host); |
|
867 |
} |
|
868 |
public String getHostByAddr(byte[] addr) |
|
869 |
throws UnknownHostException { |
|
870 |
return impl.getHostByAddr(addr); |
|
871 |
} |
|
872 |
}; |
|
873 |
} else { |
|
874 |
final String providerName = provider; |
|
875 |
try { |
|
876 |
nameService = java.security.AccessController.doPrivileged( |
|
877 |
new java.security.PrivilegedExceptionAction<NameService>() { |
|
878 |
public NameService run() { |
|
879 |
Iterator itr = Service.providers(NameServiceDescriptor.class); |
|
880 |
while (itr.hasNext()) { |
|
881 |
NameServiceDescriptor nsd |
|
882 |
= (NameServiceDescriptor)itr.next(); |
|
883 |
if (providerName. |
|
884 |
equalsIgnoreCase(nsd.getType()+"," |
|
885 |
+nsd.getProviderName())) { |
|
886 |
try { |
|
887 |
return nsd.createNameService(); |
|
888 |
} catch (Exception e) { |
|
889 |
e.printStackTrace(); |
|
890 |
System.err.println( |
|
891 |
"Cannot create name service:" |
|
892 |
+providerName+": " + e); |
|
893 |
} |
|
894 |
} |
|
895 |
} |
|
896 |
||
897 |
return null; |
|
898 |
} |
|
899 |
} |
|
900 |
); |
|
901 |
} catch (java.security.PrivilegedActionException e) { |
|
902 |
} |
|
903 |
} |
|
904 |
||
905 |
return nameService; |
|
906 |
} |
|
907 |
||
908 |
static { |
|
909 |
// create the impl |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
910 |
impl = InetAddressImplFactory.create(); |
2 | 911 |
|
912 |
// get name service if provided and requested |
|
913 |
String provider = null;; |
|
914 |
String propPrefix = "sun.net.spi.nameservice.provider."; |
|
915 |
int n = 1; |
|
916 |
nameServices = new ArrayList<NameService>(); |
|
917 |
provider = AccessController.doPrivileged( |
|
918 |
new GetPropertyAction(propPrefix + n)); |
|
919 |
while (provider != null) { |
|
920 |
NameService ns = createNSProvider(provider); |
|
921 |
if (ns != null) |
|
922 |
nameServices.add(ns); |
|
923 |
||
924 |
n++; |
|
925 |
provider = AccessController.doPrivileged( |
|
926 |
new GetPropertyAction(propPrefix + n)); |
|
927 |
} |
|
928 |
||
929 |
// if not designate any name services provider, |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
930 |
// create a default one |
2 | 931 |
if (nameServices.size() == 0) { |
932 |
NameService ns = createNSProvider("default"); |
|
933 |
nameServices.add(ns); |
|
934 |
} |
|
935 |
} |
|
936 |
||
937 |
/** |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
938 |
* Creates an InetAddress based on the provided host name and IP address. |
2 | 939 |
* No name service is checked for the validity of the address. |
940 |
* |
|
941 |
* <p> The host name can either be a machine name, such as |
|
942 |
* "<code>java.sun.com</code>", or a textual representation of its IP |
|
943 |
* address. |
|
944 |
* <p> No validity checking is done on the host name either. |
|
945 |
* |
|
946 |
* <p> If addr specifies an IPv4 address an instance of Inet4Address |
|
947 |
* will be returned; otherwise, an instance of Inet6Address |
|
948 |
* will be returned. |
|
949 |
* |
|
950 |
* <p> IPv4 address byte array must be 4 bytes long and IPv6 byte array |
|
951 |
* must be 16 bytes long |
|
952 |
* |
|
953 |
* @param host the specified host |
|
954 |
* @param addr the raw IP address in network byte order |
|
955 |
* @return an InetAddress object created from the raw IP address. |
|
956 |
* @exception UnknownHostException if IP address is of illegal length |
|
957 |
* @since 1.4 |
|
958 |
*/ |
|
959 |
public static InetAddress getByAddress(String host, byte[] addr) |
|
960 |
throws UnknownHostException { |
|
961 |
if (host != null && host.length() > 0 && host.charAt(0) == '[') { |
|
962 |
if (host.charAt(host.length()-1) == ']') { |
|
963 |
host = host.substring(1, host.length() -1); |
|
964 |
} |
|
965 |
} |
|
966 |
if (addr != null) { |
|
967 |
if (addr.length == Inet4Address.INADDRSZ) { |
|
968 |
return new Inet4Address(host, addr); |
|
969 |
} else if (addr.length == Inet6Address.INADDRSZ) { |
|
970 |
byte[] newAddr |
|
971 |
= IPAddressUtil.convertFromIPv4MappedAddress(addr); |
|
972 |
if (newAddr != null) { |
|
973 |
return new Inet4Address(host, newAddr); |
|
974 |
} else { |
|
975 |
return new Inet6Address(host, addr); |
|
976 |
} |
|
977 |
} |
|
978 |
} |
|
979 |
throw new UnknownHostException("addr is of illegal length"); |
|
980 |
} |
|
981 |
||
982 |
||
983 |
/** |
|
984 |
* Determines the IP address of a host, given the host's name. |
|
985 |
* |
|
986 |
* <p> The host name can either be a machine name, such as |
|
987 |
* "<code>java.sun.com</code>", or a textual representation of its |
|
988 |
* IP address. If a literal IP address is supplied, only the |
|
989 |
* validity of the address format is checked. |
|
990 |
* |
|
991 |
* <p> For <code>host</code> specified in literal IPv6 address, |
|
992 |
* either the form defined in RFC 2732 or the literal IPv6 address |
|
993 |
* format defined in RFC 2373 is accepted. IPv6 scoped addresses are also |
|
994 |
* supported. See <a href="Inet6Address.html#scoped">here</a> for a description of IPv6 |
|
995 |
* scoped addresses. |
|
996 |
* |
|
997 |
* <p> If the host is <tt>null</tt> then an <tt>InetAddress</tt> |
|
998 |
* representing an address of the loopback interface is returned. |
|
999 |
* See <a href="http://www.ietf.org/rfc/rfc3330.txt">RFC 3330</a> |
|
1000 |
* section 2 and <a href="http://www.ietf.org/rfc/rfc2373.txt">RFC 2373</a> |
|
1001 |
* section 2.5.3. </p> |
|
1002 |
* |
|
1003 |
* @param host the specified host, or <code>null</code>. |
|
1004 |
* @return an IP address for the given host name. |
|
1005 |
* @exception UnknownHostException if no IP address for the |
|
1006 |
* <code>host</code> could be found, or if a scope_id was specified |
|
1007 |
* for a global IPv6 address. |
|
1008 |
* @exception SecurityException if a security manager exists |
|
1009 |
* and its checkConnect method doesn't allow the operation |
|
1010 |
*/ |
|
1011 |
public static InetAddress getByName(String host) |
|
1012 |
throws UnknownHostException { |
|
1013 |
return InetAddress.getAllByName(host)[0]; |
|
1014 |
} |
|
1015 |
||
9775 | 1016 |
// called from deployment cache manager |
1017 |
private static InetAddress getByName(String host, InetAddress reqAddr) |
|
1018 |
throws UnknownHostException { |
|
1019 |
return InetAddress.getAllByName(host, reqAddr)[0]; |
|
1020 |
} |
|
1021 |
||
2 | 1022 |
/** |
1023 |
* Given the name of a host, returns an array of its IP addresses, |
|
1024 |
* based on the configured name service on the system. |
|
1025 |
* |
|
1026 |
* <p> The host name can either be a machine name, such as |
|
1027 |
* "<code>java.sun.com</code>", or a textual representation of its IP |
|
1028 |
* address. If a literal IP address is supplied, only the |
|
1029 |
* validity of the address format is checked. |
|
1030 |
* |
|
1031 |
* <p> For <code>host</code> specified in <i>literal IPv6 address</i>, |
|
1032 |
* either the form defined in RFC 2732 or the literal IPv6 address |
|
1033 |
* format defined in RFC 2373 is accepted. A literal IPv6 address may |
|
1034 |
* also be qualified by appending a scoped zone identifier or scope_id. |
|
1035 |
* The syntax and usage of scope_ids is described |
|
1036 |
* <a href="Inet6Address.html#scoped">here</a>. |
|
1037 |
* <p> If the host is <tt>null</tt> then an <tt>InetAddress</tt> |
|
1038 |
* representing an address of the loopback interface is returned. |
|
1039 |
* See <a href="http://www.ietf.org/rfc/rfc3330.txt">RFC 3330</a> |
|
1040 |
* section 2 and <a href="http://www.ietf.org/rfc/rfc2373.txt">RFC 2373</a> |
|
1041 |
* section 2.5.3. </p> |
|
1042 |
* |
|
1043 |
* <p> If there is a security manager and <code>host</code> is not |
|
1044 |
* null and <code>host.length() </code> is not equal to zero, the |
|
1045 |
* security manager's |
|
1046 |
* <code>checkConnect</code> method is called |
|
1047 |
* with the hostname and <code>-1</code> |
|
1048 |
* as its arguments to see if the operation is allowed. |
|
1049 |
* |
|
1050 |
* @param host the name of the host, or <code>null</code>. |
|
1051 |
* @return an array of all the IP addresses for a given host name. |
|
1052 |
* |
|
1053 |
* @exception UnknownHostException if no IP address for the |
|
1054 |
* <code>host</code> could be found, or if a scope_id was specified |
|
1055 |
* for a global IPv6 address. |
|
1056 |
* @exception SecurityException if a security manager exists and its |
|
1057 |
* <code>checkConnect</code> method doesn't allow the operation. |
|
1058 |
* |
|
1059 |
* @see SecurityManager#checkConnect |
|
1060 |
*/ |
|
1061 |
public static InetAddress[] getAllByName(String host) |
|
1062 |
throws UnknownHostException { |
|
9775 | 1063 |
return getAllByName(host, null); |
1064 |
} |
|
1065 |
||
1066 |
private static InetAddress[] getAllByName(String host, InetAddress reqAddr) |
|
1067 |
throws UnknownHostException { |
|
2 | 1068 |
|
1069 |
if (host == null || host.length() == 0) { |
|
1070 |
InetAddress[] ret = new InetAddress[1]; |
|
1071 |
ret[0] = impl.loopbackAddress(); |
|
1072 |
return ret; |
|
1073 |
} |
|
1074 |
||
1075 |
boolean ipv6Expected = false; |
|
1076 |
if (host.charAt(0) == '[') { |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1077 |
// This is supposed to be an IPv6 literal |
2 | 1078 |
if (host.length() > 2 && host.charAt(host.length()-1) == ']') { |
1079 |
host = host.substring(1, host.length() -1); |
|
1080 |
ipv6Expected = true; |
|
1081 |
} else { |
|
1082 |
// This was supposed to be a IPv6 address, but it's not! |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1083 |
throw new UnknownHostException(host + ": invalid IPv6 address"); |
2 | 1084 |
} |
1085 |
} |
|
1086 |
||
1087 |
// if host is an IP address, we won't do further lookup |
|
1088 |
if (Character.digit(host.charAt(0), 16) != -1 |
|
1089 |
|| (host.charAt(0) == ':')) { |
|
1090 |
byte[] addr = null; |
|
1091 |
int numericZone = -1; |
|
1092 |
String ifname = null; |
|
1093 |
// see if it is IPv4 address |
|
1094 |
addr = IPAddressUtil.textToNumericFormatV4(host); |
|
1095 |
if (addr == null) { |
|
1096 |
// see if it is IPv6 address |
|
1097 |
// Check if a numeric or string zone id is present |
|
1098 |
int pos; |
|
1099 |
if ((pos=host.indexOf ("%")) != -1) { |
|
1100 |
numericZone = checkNumericZone (host); |
|
1101 |
if (numericZone == -1) { /* remainder of string must be an ifname */ |
|
1102 |
ifname = host.substring (pos+1); |
|
1103 |
} |
|
1104 |
} |
|
1105 |
addr = IPAddressUtil.textToNumericFormatV6(host); |
|
1106 |
} else if (ipv6Expected) { |
|
1107 |
// Means an IPv4 litteral between brackets! |
|
1108 |
throw new UnknownHostException("["+host+"]"); |
|
1109 |
} |
|
1110 |
InetAddress[] ret = new InetAddress[1]; |
|
1111 |
if(addr != null) { |
|
1112 |
if (addr.length == Inet4Address.INADDRSZ) { |
|
1113 |
ret[0] = new Inet4Address(null, addr); |
|
1114 |
} else { |
|
1115 |
if (ifname != null) { |
|
1116 |
ret[0] = new Inet6Address(null, addr, ifname); |
|
1117 |
} else { |
|
1118 |
ret[0] = new Inet6Address(null, addr, numericZone); |
|
1119 |
} |
|
1120 |
} |
|
1121 |
return ret; |
|
1122 |
} |
|
1123 |
} else if (ipv6Expected) { |
|
1124 |
// We were expecting an IPv6 Litteral, but got something else |
|
1125 |
throw new UnknownHostException("["+host+"]"); |
|
1126 |
} |
|
9775 | 1127 |
return getAllByName0(host, reqAddr, true); |
2 | 1128 |
} |
1129 |
||
1130 |
/** |
|
1131 |
* Returns the loopback address. |
|
1132 |
* <p> |
|
1133 |
* The InetAddress returned will represent the IPv4 |
|
1134 |
* loopback address, 127.0.0.1, or the IPv6 loopback |
|
1135 |
* address, ::1. The IPv4 loopback address returned |
|
1136 |
* is only one of many in the form 127.*.*.* |
|
1137 |
* |
|
1138 |
* @return the InetAddress loopback instance. |
|
1139 |
* @since 1.7 |
|
1140 |
*/ |
|
1141 |
public static InetAddress getLoopbackAddress() { |
|
1142 |
return impl.loopbackAddress(); |
|
1143 |
} |
|
1144 |
||
1145 |
||
1146 |
/** |
|
1147 |
* check if the literal address string has %nn appended |
|
1148 |
* returns -1 if not, or the numeric value otherwise. |
|
1149 |
* |
|
1150 |
* %nn may also be a string that represents the displayName of |
|
1151 |
* a currently available NetworkInterface. |
|
1152 |
*/ |
|
1153 |
private static int checkNumericZone (String s) throws UnknownHostException { |
|
1154 |
int percent = s.indexOf ('%'); |
|
1155 |
int slen = s.length(); |
|
1156 |
int digit, zone=0; |
|
1157 |
if (percent == -1) { |
|
1158 |
return -1; |
|
1159 |
} |
|
1160 |
for (int i=percent+1; i<slen; i++) { |
|
1161 |
char c = s.charAt(i); |
|
1162 |
if (c == ']') { |
|
1163 |
if (i == percent+1) { |
|
1164 |
/* empty per-cent field */ |
|
1165 |
return -1; |
|
1166 |
} |
|
1167 |
break; |
|
1168 |
} |
|
1169 |
if ((digit = Character.digit (c, 10)) < 0) { |
|
1170 |
return -1; |
|
1171 |
} |
|
1172 |
zone = (zone * 10) + digit; |
|
1173 |
} |
|
1174 |
return zone; |
|
1175 |
} |
|
1176 |
||
1177 |
private static InetAddress[] getAllByName0 (String host) |
|
1178 |
throws UnknownHostException |
|
1179 |
{ |
|
1180 |
return getAllByName0(host, true); |
|
1181 |
} |
|
1182 |
||
1183 |
/** |
|
1184 |
* package private so SocketPermission can call it |
|
1185 |
*/ |
|
1186 |
static InetAddress[] getAllByName0 (String host, boolean check) |
|
1187 |
throws UnknownHostException { |
|
9775 | 1188 |
return getAllByName0 (host, null, check); |
1189 |
} |
|
1190 |
||
1191 |
private static InetAddress[] getAllByName0 (String host, InetAddress reqAddr, boolean check) |
|
1192 |
throws UnknownHostException { |
|
1193 |
||
2 | 1194 |
/* If it gets here it is presumed to be a hostname */ |
1195 |
/* Cache.get can return: null, unknownAddress, or InetAddress[] */ |
|
1196 |
||
1197 |
/* make sure the connection to the host is allowed, before we |
|
1198 |
* give out a hostname |
|
1199 |
*/ |
|
1200 |
if (check) { |
|
1201 |
SecurityManager security = System.getSecurityManager(); |
|
1202 |
if (security != null) { |
|
1203 |
security.checkConnect(host, -1); |
|
1204 |
} |
|
1205 |
} |
|
1206 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1207 |
InetAddress[] addresses = getCachedAddresses(host); |
2 | 1208 |
|
1209 |
/* If no entry in cache, then do the host lookup */ |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1210 |
if (addresses == null) { |
9775 | 1211 |
addresses = getAddressesFromNameService(host, reqAddr); |
2 | 1212 |
} |
1213 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1214 |
if (addresses == unknown_array) |
2 | 1215 |
throw new UnknownHostException(host); |
1216 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1217 |
return addresses.clone(); |
2 | 1218 |
} |
1219 |
||
9775 | 1220 |
private static InetAddress[] getAddressesFromNameService(String host, InetAddress reqAddr) |
2 | 1221 |
throws UnknownHostException |
1222 |
{ |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1223 |
InetAddress[] addresses = null; |
2 | 1224 |
boolean success = false; |
1225 |
UnknownHostException ex = null; |
|
1226 |
||
1227 |
// Check whether the host is in the lookupTable. |
|
1228 |
// 1) If the host isn't in the lookupTable when |
|
1229 |
// checkLookupTable() is called, checkLookupTable() |
|
1230 |
// would add the host in the lookupTable and |
|
1231 |
// return null. So we will do the lookup. |
|
1232 |
// 2) If the host is in the lookupTable when |
|
1233 |
// checkLookupTable() is called, the current thread |
|
1234 |
// would be blocked until the host is removed |
|
1235 |
// from the lookupTable. Then this thread |
|
1236 |
// should try to look up the addressCache. |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1237 |
// i) if it found the addresses in the |
2 | 1238 |
// addressCache, checkLookupTable() would |
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1239 |
// return the addresses. |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1240 |
// ii) if it didn't find the addresses in the |
2 | 1241 |
// addressCache for any reason, |
1242 |
// it should add the host in the |
|
1243 |
// lookupTable and return null so the |
|
1244 |
// following code would do a lookup itself. |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1245 |
if ((addresses = checkLookupTable(host)) == null) { |
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1246 |
try { |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1247 |
// This is the first thread which looks up the addresses |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1248 |
// this host or the cache entry for this host has been |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1249 |
// expired so this thread should do the lookup. |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1250 |
for (NameService nameService : nameServices) { |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1251 |
try { |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1252 |
/* |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1253 |
* Do not put the call to lookup() inside the |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1254 |
* constructor. if you do you will still be |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1255 |
* allocating space when the lookup fails. |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1256 |
*/ |
2 | 1257 |
|
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1258 |
addresses = nameService.lookupAllHostAddr(host); |
2 | 1259 |
success = true; |
1260 |
break; |
|
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1261 |
} catch (UnknownHostException uhe) { |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1262 |
if (host.equalsIgnoreCase("localhost")) { |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1263 |
InetAddress[] local = new InetAddress[] { impl.loopbackAddress() }; |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1264 |
addresses = local; |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1265 |
success = true; |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1266 |
break; |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1267 |
} |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1268 |
else { |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1269 |
addresses = unknown_array; |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1270 |
success = false; |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1271 |
ex = uhe; |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1272 |
} |
2 | 1273 |
} |
1274 |
} |
|
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1275 |
|
9775 | 1276 |
// More to do? |
1277 |
if (reqAddr != null && addresses.length > 1 && !addresses[0].equals(reqAddr)) { |
|
1278 |
// Find it? |
|
1279 |
int i = 1; |
|
1280 |
for (; i < addresses.length; i++) { |
|
1281 |
if (addresses[i].equals(reqAddr)) { |
|
1282 |
break; |
|
1283 |
} |
|
1284 |
} |
|
1285 |
// Rotate |
|
1286 |
if (i < addresses.length) { |
|
1287 |
InetAddress tmp, tmp2 = reqAddr; |
|
1288 |
for (int j = 0; j < i; j++) { |
|
1289 |
tmp = addresses[j]; |
|
1290 |
addresses[j] = tmp2; |
|
1291 |
tmp2 = tmp; |
|
1292 |
} |
|
1293 |
addresses[i] = tmp2; |
|
1294 |
} |
|
1295 |
} |
|
1296 |
// Cache the address. |
|
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1297 |
cacheAddresses(host, addresses, success); |
9775 | 1298 |
|
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1299 |
if (!success && ex != null) |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1300 |
throw ex; |
9775 | 1301 |
|
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1302 |
} finally { |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1303 |
// Delete host from the lookupTable and notify |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1304 |
// all threads waiting on the lookupTable monitor. |
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1305 |
updateLookupTable(host); |
2 | 1306 |
} |
1307 |
} |
|
1308 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1309 |
return addresses; |
2 | 1310 |
} |
1311 |
||
1312 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1313 |
private static InetAddress[] checkLookupTable(String host) { |
2 | 1314 |
synchronized (lookupTable) { |
1315 |
// If the host isn't in the lookupTable, add it in the |
|
1316 |
// lookuptable and return null. The caller should do |
|
1317 |
// the lookup. |
|
1318 |
if (lookupTable.containsKey(host) == false) { |
|
1319 |
lookupTable.put(host, null); |
|
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1320 |
return null; |
2 | 1321 |
} |
1322 |
||
1323 |
// If the host is in the lookupTable, it means that another |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1324 |
// thread is trying to look up the addresses of this host. |
2 | 1325 |
// This thread should wait. |
1326 |
while (lookupTable.containsKey(host)) { |
|
1327 |
try { |
|
1328 |
lookupTable.wait(); |
|
1329 |
} catch (InterruptedException e) { |
|
1330 |
} |
|
1331 |
} |
|
1332 |
} |
|
1333 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1334 |
// The other thread has finished looking up the addresses of |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1335 |
// the host. This thread should retry to get the addresses |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1336 |
// from the addressCache. If it doesn't get the addresses from |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1337 |
// the cache, it will try to look up the addresses itself. |
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1338 |
InetAddress[] addresses = getCachedAddresses(host); |
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1339 |
if (addresses == null) { |
2 | 1340 |
synchronized (lookupTable) { |
1341 |
lookupTable.put(host, null); |
|
7995
8168047d48c2
7012768: InetAddress lookupTable leaks/deadlocks when using unsupported name service spi
chegar
parents:
7668
diff
changeset
|
1342 |
return null; |
2 | 1343 |
} |
1344 |
} |
|
1345 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1346 |
return addresses; |
2 | 1347 |
} |
1348 |
||
1349 |
private static void updateLookupTable(String host) { |
|
1350 |
synchronized (lookupTable) { |
|
1351 |
lookupTable.remove(host); |
|
1352 |
lookupTable.notifyAll(); |
|
1353 |
} |
|
1354 |
} |
|
1355 |
||
1356 |
/** |
|
1357 |
* Returns an <code>InetAddress</code> object given the raw IP address . |
|
1358 |
* The argument is in network byte order: the highest order |
|
1359 |
* byte of the address is in <code>getAddress()[0]</code>. |
|
1360 |
* |
|
1361 |
* <p> This method doesn't block, i.e. no reverse name service lookup |
|
1362 |
* is performed. |
|
1363 |
* |
|
1364 |
* <p> IPv4 address byte array must be 4 bytes long and IPv6 byte array |
|
1365 |
* must be 16 bytes long |
|
1366 |
* |
|
1367 |
* @param addr the raw IP address in network byte order |
|
1368 |
* @return an InetAddress object created from the raw IP address. |
|
1369 |
* @exception UnknownHostException if IP address is of illegal length |
|
1370 |
* @since 1.4 |
|
1371 |
*/ |
|
1372 |
public static InetAddress getByAddress(byte[] addr) |
|
1373 |
throws UnknownHostException { |
|
1374 |
return getByAddress(null, addr); |
|
1375 |
} |
|
1376 |
||
1377 |
private static InetAddress cachedLocalHost = null; |
|
1378 |
private static long cacheTime = 0; |
|
1379 |
private static final long maxCacheTime = 5000L; |
|
1380 |
private static final Object cacheLock = new Object(); |
|
1381 |
||
1382 |
/** |
|
1383 |
* Returns the address of the local host. This is achieved by retrieving |
|
1384 |
* the name of the host from the system, then resolving that name into |
|
1385 |
* an <code>InetAddress</code>. |
|
1386 |
* |
|
1387 |
* <P>Note: The resolved address may be cached for a short period of time. |
|
1388 |
* </P> |
|
1389 |
* |
|
1390 |
* <p>If there is a security manager, its |
|
1391 |
* <code>checkConnect</code> method is called |
|
1392 |
* with the local host name and <code>-1</code> |
|
1393 |
* as its arguments to see if the operation is allowed. |
|
1394 |
* If the operation is not allowed, an InetAddress representing |
|
1395 |
* the loopback address is returned. |
|
1396 |
* |
|
1397 |
* @return the address of the local host. |
|
1398 |
* |
|
1399 |
* @exception UnknownHostException if the local host name could not |
|
1400 |
* be resolved into an address. |
|
1401 |
* |
|
1402 |
* @see SecurityManager#checkConnect |
|
1403 |
* @see java.net.InetAddress#getByName(java.lang.String) |
|
1404 |
*/ |
|
1405 |
public static InetAddress getLocalHost() throws UnknownHostException { |
|
1406 |
||
1407 |
SecurityManager security = System.getSecurityManager(); |
|
1408 |
try { |
|
1409 |
String local = impl.getLocalHostName(); |
|
1410 |
||
1411 |
if (security != null) { |
|
1412 |
security.checkConnect(local, -1); |
|
1413 |
} |
|
1414 |
||
1415 |
if (local.equals("localhost")) { |
|
1416 |
return impl.loopbackAddress(); |
|
1417 |
} |
|
1418 |
||
1419 |
InetAddress ret = null; |
|
1420 |
synchronized (cacheLock) { |
|
1421 |
long now = System.currentTimeMillis(); |
|
1422 |
if (cachedLocalHost != null) { |
|
1423 |
if ((now - cacheTime) < maxCacheTime) // Less than 5s old? |
|
1424 |
ret = cachedLocalHost; |
|
1425 |
else |
|
1426 |
cachedLocalHost = null; |
|
1427 |
} |
|
1428 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1429 |
// we are calling getAddressesFromNameService directly |
2 | 1430 |
// to avoid getting localHost from cache |
1431 |
if (ret == null) { |
|
1432 |
InetAddress[] localAddrs; |
|
1433 |
try { |
|
1434 |
localAddrs = |
|
9775 | 1435 |
InetAddress.getAddressesFromNameService(local, null); |
2 | 1436 |
} catch (UnknownHostException uhe) { |
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1437 |
// Rethrow with a more informative error message. |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1438 |
UnknownHostException uhe2 = |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1439 |
new UnknownHostException(local + ": " + |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1440 |
uhe.getMessage()); |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1441 |
uhe2.initCause(uhe); |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1442 |
throw uhe2; |
2 | 1443 |
} |
1444 |
cachedLocalHost = localAddrs[0]; |
|
1445 |
cacheTime = now; |
|
1446 |
ret = localAddrs[0]; |
|
1447 |
} |
|
1448 |
} |
|
1449 |
return ret; |
|
1450 |
} catch (java.lang.SecurityException e) { |
|
1451 |
return impl.loopbackAddress(); |
|
1452 |
} |
|
1453 |
} |
|
1454 |
||
1455 |
/** |
|
1456 |
* Perform class load-time initializations. |
|
1457 |
*/ |
|
1458 |
private static native void init(); |
|
1459 |
||
1460 |
||
1461 |
/* |
|
1462 |
* Returns the InetAddress representing anyLocalAddress |
|
1463 |
* (typically 0.0.0.0 or ::0) |
|
1464 |
*/ |
|
1465 |
static InetAddress anyLocalAddress() { |
|
1466 |
return impl.anyLocalAddress(); |
|
1467 |
} |
|
1468 |
||
1469 |
/* |
|
1470 |
* Load and instantiate an underlying impl class |
|
1471 |
*/ |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1472 |
static InetAddressImpl loadImpl(String implName) { |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1473 |
Object impl = null; |
2 | 1474 |
|
1475 |
/* |
|
1476 |
* Property "impl.prefix" will be prepended to the classname |
|
1477 |
* of the implementation object we instantiate, to which we |
|
1478 |
* delegate the real work (like native methods). This |
|
1479 |
* property can vary across implementations of the java. |
|
1480 |
* classes. The default is an empty String "". |
|
1481 |
*/ |
|
1482 |
String prefix = AccessController.doPrivileged( |
|
1483 |
new GetPropertyAction("impl.prefix", "")); |
|
1484 |
try { |
|
1485 |
impl = Class.forName("java.net." + prefix + implName).newInstance(); |
|
1486 |
} catch (ClassNotFoundException e) { |
|
1487 |
System.err.println("Class not found: java.net." + prefix + |
|
1488 |
implName + ":\ncheck impl.prefix property " + |
|
1489 |
"in your properties file."); |
|
1490 |
} catch (InstantiationException e) { |
|
1491 |
System.err.println("Could not instantiate: java.net." + prefix + |
|
1492 |
implName + ":\ncheck impl.prefix property " + |
|
1493 |
"in your properties file."); |
|
1494 |
} catch (IllegalAccessException e) { |
|
1495 |
System.err.println("Cannot access class: java.net." + prefix + |
|
1496 |
implName + ":\ncheck impl.prefix property " + |
|
1497 |
"in your properties file."); |
|
1498 |
} |
|
1499 |
||
1500 |
if (impl == null) { |
|
1501 |
try { |
|
1502 |
impl = Class.forName(implName).newInstance(); |
|
1503 |
} catch (Exception e) { |
|
1504 |
throw new Error("System property impl.prefix incorrect"); |
|
1505 |
} |
|
1506 |
} |
|
1507 |
||
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1508 |
return (InetAddressImpl) impl; |
2 | 1509 |
} |
5180
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1510 |
|
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1511 |
private void readObjectNoData (ObjectInputStream s) throws |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1512 |
IOException, ClassNotFoundException { |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1513 |
if (getClass().getClassLoader() != null) { |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1514 |
throw new SecurityException ("invalid address type"); |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1515 |
} |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1516 |
} |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1517 |
|
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1518 |
private void readObject (ObjectInputStream s) throws |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1519 |
IOException, ClassNotFoundException { |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1520 |
s.defaultReadObject (); |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1521 |
if (getClass().getClassLoader() != null) { |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1522 |
hostName = null; |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1523 |
address = 0; |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1524 |
throw new SecurityException ("invalid address type"); |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1525 |
} |
8161f879d704
6893954: Subclasses of InetAddress may incorrectly interpret network addresses
michaelm
parents:
2
diff
changeset
|
1526 |
} |
2 | 1527 |
} |
1528 |
||
1529 |
/* |
|
1530 |
* Simple factory to create the impl |
|
1531 |
*/ |
|
1532 |
class InetAddressImplFactory { |
|
1533 |
||
1534 |
static InetAddressImpl create() { |
|
6670
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1535 |
return InetAddress.loadImpl(isIPv6Supported() ? |
ae13809f3ce7
6981157: Improve UnknownHostException with EAI error details and other cleanups
martin
parents:
5506
diff
changeset
|
1536 |
"Inet6AddressImpl" : "Inet4AddressImpl"); |
2 | 1537 |
} |
1538 |
||
1539 |
static native boolean isIPv6Supported(); |
|
1540 |
} |