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	/*
	* Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package java.net;

	import java.io.IOException;
	import java.io.ObjectInputStream;
	import java.io.ObjectOutputStream;
	import java.io.ObjectStreamField;
	import java.io.Serializable;
	import java.net.InetAddress;
	import java.security.AccessController;
	import java.security.Permission;
	import java.security.PermissionCollection;
	import java.security.PrivilegedAction;
	import java.security.Security;
	import java.util.Collections;
	import java.util.Comparator;
	import java.util.Enumeration;
	import java.util.Vector;
	import java.util.StringJoiner;
	import java.util.StringTokenizer;
	import java.util.concurrent.ConcurrentSkipListMap;
	import sun.net.util.IPAddressUtil;
	import sun.net.PortConfig;
	import sun.security.util.RegisteredDomain;
	import sun.security.util.SecurityConstants;
	import sun.security.util.Debug;


	/**
	* This class represents access to a network via sockets.
	* A SocketPermission consists of a
	* host specification and a set of "actions" specifying ways to
	* connect to that host. The host is specified as
	* <pre>
	* host = (hostname \| IPv4address \| iPv6reference) [:portrange]
	* portrange = portnumber \| -portnumber \| portnumber-[portnumber]
	* </pre>
	* The host is expressed as a DNS name, as a numerical IP address,
	* or as "localhost" (for the local machine).
	* The wildcard "*" may be included once in a DNS name host
	* specification. If it is included, it must be in the leftmost
	* position, as in "*.sun.com".
	* <p>
	* The format of the IPv6reference should follow that specified in <a
	* href="http://www.ietf.org/rfc/rfc2732.txt"><i>RFC 2732: Format
	* for Literal IPv6 Addresses in URLs</i></a>:
	* <pre>
	* ipv6reference = "[" IPv6address "]"
	*</pre>
	* For example, you can construct a SocketPermission instance
	* as the following:
	* <pre>
	* String hostAddress = inetaddress.getHostAddress();
	* if (inetaddress instanceof Inet6Address) {
	* sp = new SocketPermission("[" + hostAddress + "]:" + port, action);
	* } else {
	* sp = new SocketPermission(hostAddress + ":" + port, action);
	* }
	* </pre>
	* or
	* <pre>
	* String host = url.getHost();
	* sp = new SocketPermission(host + ":" + port, action);
	* </pre>
	* <p>
	* The <A HREF="Inet6Address.html#lform">full uncompressed form</A> of
	* an IPv6 literal address is also valid.
	* <p>
	* The port or portrange is optional. A port specification of the
	* form "N-", where <i>N</i> is a port number, signifies all ports
	* numbered <i>N</i> and above, while a specification of the
	* form "-N" indicates all ports numbered <i>N</i> and below.
	* The special port value {@code 0} refers to the entire <i>ephemeral</i>
	* port range. This is a fixed range of ports a system may use to
	* allocate dynamic ports from. The actual range may be system dependent.
	* <p>
	* The possible ways to connect to the host are
	* <pre>
	* accept
	* connect
	* listen
	* resolve
	* </pre>
	* The "listen" action is only meaningful when used with "localhost" and
	* means the ability to bind to a specified port.
	* The "resolve" action is implied when any of the other actions are present.
	* The action "resolve" refers to host/ip name service lookups.
	* <P>
	* The actions string is converted to lowercase before processing.
	* <p>As an example of the creation and meaning of SocketPermissions,
	* note that if the following permission:
	*
	* <pre>
	* p1 = new SocketPermission("puffin.eng.sun.com:7777", "connect,accept");
	* </pre>
	*
	* is granted to some code, it allows that code to connect to port 7777 on
	* {@code puffin.eng.sun.com}, and to accept connections on that port.
	*
	* <p>Similarly, if the following permission:
	*
	* <pre>
	* p2 = new SocketPermission("localhost:1024-", "accept,connect,listen");
	* </pre>
	*
	* is granted to some code, it allows that code to
	* accept connections on, connect to, or listen on any port between
	* 1024 and 65535 on the local host.
	*
	* <p>Note: Granting code permission to accept or make connections to remote
	* hosts may be dangerous because malevolent code can then more easily
	* transfer and share confidential data among parties who may not
	* otherwise have access to the data.
	*
	* @see java.security.Permissions
	* @see SocketPermission
	*
	*
	* @author Marianne Mueller
	* @author Roland Schemers
	* @since 1.2
	*
	* @serial exclude
	*/

	public final class SocketPermission extends Permission
	implements java.io.Serializable
	{
	private static final long serialVersionUID = -7204263841984476862L;

	/**
	* Connect to host:port
	*/
	private static final int CONNECT = 0x1;

	/**
	* Listen on host:port
	*/
	private static final int LISTEN = 0x2;

	/**
	* Accept a connection from host:port
	*/
	private static final int ACCEPT = 0x4;

	/**
	* Resolve DNS queries
	*/
	private static final int RESOLVE = 0x8;

	/**
	* No actions
	*/
	private static final int NONE = 0x0;

	/**
	* All actions
	*/
	private static final int ALL = CONNECT\|LISTEN\|ACCEPT\|RESOLVE;

	// various port constants
	private static final int PORT_MIN = 0;
	private static final int PORT_MAX = 65535;
	private static final int PRIV_PORT_MAX = 1023;
	private static final int DEF_EPH_LOW = 49152;

	// the actions mask
	private transient int mask;

	/**
	* the actions string.
	*
	* @serial
	*/

	private String actions; // Left null as long as possible, then
	// created and re-used in the getAction function.

	// hostname part as it is passed
	private transient String hostname;

	// the canonical name of the host
	// in the case of "*.foo.com", cname is ".foo.com".

	private transient String cname;

	// all the IP addresses of the host
	private transient InetAddress[] addresses;

	// true if the hostname is a wildcard (e.g. "*.sun.com")
	private transient boolean wildcard;

	// true if we were initialized with a single numeric IP address
	private transient boolean init_with_ip;

	// true if this SocketPermission represents an invalid/unknown host
	// used for implies when the delayed lookup has already failed
	private transient boolean invalid;

	// port range on host
	private transient int[] portrange;

	private transient boolean defaultDeny = false;

	// true if this SocketPermission represents a hostname
	// that failed our reverse mapping heuristic test
	private transient boolean untrusted;
	private transient boolean trusted;

	// true if the sun.net.trustNameService system property is set
	private static boolean trustNameService;

	private static Debug debug = null;
	private static boolean debugInit = false;

	// lazy initializer
	private static class EphemeralRange {
	static final int low = initEphemeralPorts("low", DEF_EPH_LOW);
	static final int high = initEphemeralPorts("high", PORT_MAX);
	};

	static {
	Boolean tmp = java.security.AccessController.doPrivileged(
	new sun.security.action.GetBooleanAction("sun.net.trustNameService"));
	trustNameService = tmp.booleanValue();
	}

	private static synchronized Debug getDebug() {
	if (!debugInit) {
	debug = Debug.getInstance("access");
	debugInit = true;
	}
	return debug;
	}

	/**
	* Creates a new SocketPermission object with the specified actions.
	* The host is expressed as a DNS name, or as a numerical IP address.
	* Optionally, a port or a portrange may be supplied (separated
	* from the DNS name or IP address by a colon).
	* <p>
	* To specify the local machine, use "localhost" as the <i>host</i>.
	* Also note: An empty <i>host</i> String ("") is equivalent to "localhost".
	* <p>
	* The <i>actions</i> parameter contains a comma-separated list of the
	* actions granted for the specified host (and port(s)). Possible actions are
	* "connect", "listen", "accept", "resolve", or
	* any combination of those. "resolve" is automatically added
	* when any of the other three are specified.
	* <p>
	* Examples of SocketPermission instantiation are the following:
	* <pre>
	* nr = new SocketPermission("www.catalog.com", "connect");
	* nr = new SocketPermission("www.sun.com:80", "connect");
	* nr = new SocketPermission("*.sun.com", "connect");
	* nr = new SocketPermission("*.edu", "resolve");
	* nr = new SocketPermission("204.160.241.0", "connect");
	* nr = new SocketPermission("localhost:1024-65535", "listen");
	* nr = new SocketPermission("204.160.241.0:1024-65535", "connect");
	* </pre>
	*
	* @param host the hostname or IPaddress of the computer, optionally
	* including a colon followed by a port or port range.
	* @param action the action string.
	*/
	public SocketPermission(String host, String action) {
	super(getHost(host));
	// name initialized to getHost(host); NPE detected in getHost()
	init(getName(), getMask(action));
	}


	SocketPermission(String host, int mask) {
	super(getHost(host));
	// name initialized to getHost(host); NPE detected in getHost()
	init(getName(), mask);
	}

	private void setDeny() {
	defaultDeny = true;
	}

	private static String getHost(String host) {
	if (host.equals("")) {
	return "localhost";
	} else {
	/* IPv6 literal address used in this context should follow
	* the format specified in RFC 2732;
	* if not, we try to solve the unambiguous case
	*/
	int ind;
	if (host.charAt(0) != '[') {
	if ((ind = host.indexOf(':')) != host.lastIndexOf(':')) {
	/* More than one ":", meaning IPv6 address is not
	* in RFC 2732 format;
	* We will rectify user errors for all unambiguious cases
	*/
	StringTokenizer st = new StringTokenizer(host, ":");
	int tokens = st.countTokens();
	if (tokens == 9) {
	// IPv6 address followed by port
	ind = host.lastIndexOf(':');
	host = "[" + host.substring(0, ind) + "]" +
	host.substring(ind);
	} else if (tokens == 8 && host.indexOf("::") == -1) {
	// IPv6 address only, not followed by port
	host = "[" + host + "]";
	} else {
	// could be ambiguous
	throw new IllegalArgumentException("Ambiguous"+
	" hostport part");
	}
	}
	}
	return host;
	}
	}

	private int[] parsePort(String port)
	throws Exception
	{

	if (port == null \|\| port.equals("") \|\| port.equals("*")) {
	return new int[] {PORT_MIN, PORT_MAX};
	}

	int dash = port.indexOf('-');

	if (dash == -1) {
	int p = Integer.parseInt(port);
	return new int[] {p, p};
	} else {
	String low = port.substring(0, dash);
	String high = port.substring(dash+1);
	int l,h;

	if (low.equals("")) {
	l = PORT_MIN;
	} else {
	l = Integer.parseInt(low);
	}

	if (high.equals("")) {
	h = PORT_MAX;
	} else {
	h = Integer.parseInt(high);
	}
	if (l < 0 \|\| h < 0 \|\| h<l)
	throw new IllegalArgumentException("invalid port range");

	return new int[] {l, h};
	}
	}

	/**
	* Returns true if the permission has specified zero
	* as its value (or lower bound) signifying the ephemeral range
	*/
	private boolean includesEphemerals() {
	return portrange[0] == 0;
	}

	/**
	* Initialize the SocketPermission object. We don't do any DNS lookups
	* as this point, instead we hold off until the implies method is
	* called.
	*/
	private void init(String host, int mask) {
	// Set the integer mask that represents the actions

	if ((mask & ALL) != mask)
	throw new IllegalArgumentException("invalid actions mask");

	// always OR in RESOLVE if we allow any of the others
	this.mask = mask \| RESOLVE;

	// Parse the host name. A name has up to three components, the
	// hostname, a port number, or two numbers representing a port
	// range. "www.sun.com:8080-9090" is a valid host name.

	// With IPv6 an address can be 2010:836B:4179::836B:4179
	// An IPv6 address needs to be enclose in []
	// For ex: [2010:836B:4179::836B:4179]:8080-9090
	// Refer to RFC 2732 for more information.

	int rb = 0 ;
	int start = 0, end = 0;
	int sep = -1;
	String hostport = host;
	if (host.charAt(0) == '[') {
	start = 1;
	rb = host.indexOf(']');
	if (rb != -1) {
	host = host.substring(start, rb);
	} else {
	throw new
	IllegalArgumentException("invalid host/port: "+host);
	}
	sep = hostport.indexOf(':', rb+1);
	} else {
	start = 0;
	sep = host.indexOf(':', rb);
	end = sep;
	if (sep != -1) {
	host = host.substring(start, end);
	}
	}

	if (sep != -1) {
	String port = hostport.substring(sep+1);
	try {
	portrange = parsePort(port);
	} catch (Exception e) {
	throw new
	IllegalArgumentException("invalid port range: "+port);
	}
	} else {
	portrange = new int[] { PORT_MIN, PORT_MAX };
	}

	hostname = host;

	// is this a domain wildcard specification
	if (host.lastIndexOf('*') > 0) {
	throw new
	IllegalArgumentException("invalid host wildcard specification");
	} else if (host.startsWith("*")) {
	wildcard = true;
	if (host.equals("*")) {
	cname = "";
	} else if (host.startsWith("*.")) {
	cname = host.substring(1).toLowerCase();
	} else {
	throw new
	IllegalArgumentException("invalid host wildcard specification");
	}
	return;
	} else {
	if (host.length() > 0) {
	// see if we are being initialized with an IP address.
	char ch = host.charAt(0);
	if (ch == ':' \|\| Character.digit(ch, 16) != -1) {
	byte ip[] = IPAddressUtil.textToNumericFormatV4(host);
	if (ip == null) {
	ip = IPAddressUtil.textToNumericFormatV6(host);
	}
	if (ip != null) {
	try {
	addresses =
	new InetAddress[]
	{InetAddress.getByAddress(ip) };
	init_with_ip = true;
	} catch (UnknownHostException uhe) {
	// this shouldn't happen
	invalid = true;
	}
	}
	}
	}
	}
	}

	/**
	* Convert an action string to an integer actions mask.
	*
	* @param action the action string
	* @return the action mask
	*/
	private static int getMask(String action) {

	if (action == null) {
	throw new NullPointerException("action can't be null");
	}

	if (action.equals("")) {
	throw new IllegalArgumentException("action can't be empty");
	}

	int mask = NONE;

	// Use object identity comparison against known-interned strings for
	// performance benefit (these values are used heavily within the JDK).
	if (action == SecurityConstants.SOCKET_RESOLVE_ACTION) {
	return RESOLVE;
	} else if (action == SecurityConstants.SOCKET_CONNECT_ACTION) {
	return CONNECT;
	} else if (action == SecurityConstants.SOCKET_LISTEN_ACTION) {
	return LISTEN;
	} else if (action == SecurityConstants.SOCKET_ACCEPT_ACTION) {
	return ACCEPT;
	} else if (action == SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION) {
	return CONNECT\|ACCEPT;
	}

	char[] a = action.toCharArray();

	int i = a.length - 1;
	if (i < 0)
	return mask;

	while (i != -1) {
	char c;

	// skip whitespace
	while ((i!=-1) && ((c = a[i]) == ' ' \|\|
	c == '\r' \|\|
	c == '\n' \|\|
	c == '\f' \|\|
	c == '\t'))
	i--;

	// check for the known strings
	int matchlen;

	if (i >= 6 && (a[i-6] == 'c' \|\| a[i-6] == 'C') &&
	(a[i-5] == 'o' \|\| a[i-5] == 'O') &&
	(a[i-4] == 'n' \|\| a[i-4] == 'N') &&
	(a[i-3] == 'n' \|\| a[i-3] == 'N') &&
	(a[i-2] == 'e' \|\| a[i-2] == 'E') &&
	(a[i-1] == 'c' \|\| a[i-1] == 'C') &&
	(a[i] == 't' \|\| a[i] == 'T'))
	{
	matchlen = 7;
	mask \|= CONNECT;

	} else if (i >= 6 && (a[i-6] == 'r' \|\| a[i-6] == 'R') &&
	(a[i-5] == 'e' \|\| a[i-5] == 'E') &&
	(a[i-4] == 's' \|\| a[i-4] == 'S') &&
	(a[i-3] == 'o' \|\| a[i-3] == 'O') &&
	(a[i-2] == 'l' \|\| a[i-2] == 'L') &&
	(a[i-1] == 'v' \|\| a[i-1] == 'V') &&
	(a[i] == 'e' \|\| a[i] == 'E'))
	{
	matchlen = 7;
	mask \|= RESOLVE;

	} else if (i >= 5 && (a[i-5] == 'l' \|\| a[i-5] == 'L') &&
	(a[i-4] == 'i' \|\| a[i-4] == 'I') &&
	(a[i-3] == 's' \|\| a[i-3] == 'S') &&
	(a[i-2] == 't' \|\| a[i-2] == 'T') &&
	(a[i-1] == 'e' \|\| a[i-1] == 'E') &&
	(a[i] == 'n' \|\| a[i] == 'N'))
	{
	matchlen = 6;
	mask \|= LISTEN;

	} else if (i >= 5 && (a[i-5] == 'a' \|\| a[i-5] == 'A') &&
	(a[i-4] == 'c' \|\| a[i-4] == 'C') &&
	(a[i-3] == 'c' \|\| a[i-3] == 'C') &&
	(a[i-2] == 'e' \|\| a[i-2] == 'E') &&
	(a[i-1] == 'p' \|\| a[i-1] == 'P') &&
	(a[i] == 't' \|\| a[i] == 'T'))
	{
	matchlen = 6;
	mask \|= ACCEPT;

	} else {
	// parse error
	throw new IllegalArgumentException(
	"invalid permission: " + action);
	}

	// make sure we didn't just match the tail of a word
	// like "ackbarfaccept". Also, skip to the comma.
	boolean seencomma = false;
	while (i >= matchlen && !seencomma) {
	switch(a[i-matchlen]) {
	case ',':
	seencomma = true;
	break;
	case ' ': case '\r': case '\n':
	case '\f': case '\t':
	break;
	default:
	throw new IllegalArgumentException(
	"invalid permission: " + action);
	}
	i--;
	}

	// point i at the location of the comma minus one (or -1).
	i -= matchlen;
	}

	return mask;
	}

	private boolean isUntrusted()
	throws UnknownHostException
	{
	if (trusted) return false;
	if (invalid \|\| untrusted) return true;
	try {
	if (!trustNameService && (defaultDeny \|\|
	sun.net.www.URLConnection.isProxiedHost(hostname))) {
	if (this.cname == null) {
	this.getCanonName();
	}
	if (!match(cname, hostname)) {
	// Last chance
	if (!authorized(hostname, addresses[0].getAddress())) {
	untrusted = true;
	Debug debug = getDebug();
	if (debug != null && Debug.isOn("failure")) {
	debug.println("socket access restriction: proxied host " + "(" + addresses[0] + ")" + " does not match " + cname + " from reverse lookup");
	}
	return true;
	}
	}
	trusted = true;
	}
	} catch (UnknownHostException uhe) {
	invalid = true;
	throw uhe;
	}
	return false;
	}

	/**
	* attempt to get the fully qualified domain name
	*
	*/
	void getCanonName()
	throws UnknownHostException
	{
	if (cname != null \|\| invalid \|\| untrusted) return;

	// attempt to get the canonical name

	try {
	// first get the IP addresses if we don't have them yet
	// this is because we need the IP address to then get
	// FQDN.
	if (addresses == null) {
	getIP();
	}

	// we have to do this check, otherwise we might not
	// get the fully qualified domain name
	if (init_with_ip) {
	cname = addresses[0].getHostName(false).toLowerCase();
	} else {
	cname = InetAddress.getByName(addresses[0].getHostAddress()).
	getHostName(false).toLowerCase();
	}
	} catch (UnknownHostException uhe) {
	invalid = true;
	throw uhe;
	}
	}

	private transient String cdomain, hdomain;

	/**
	* previously we allowed domain names to be specified in IDN ACE form
	* Need to check for that and convert to Unicode
	*/
	private static String checkForIDN(String name) {
	if (name.startsWith("xn--") \|\| name.contains(".xn--")) {
	return IDN.toUnicode(name);
	} else {
	return name;
	}
	}

	private boolean match(String cname, String hname) {
	String a = checkForIDN(cname.toLowerCase());
	String b = checkForIDN(hname.toLowerCase());
	if (a.startsWith(b) &&
	((a.length() == b.length()) \|\| (a.charAt(b.length()) == '.'))) {
	return true;
	}
	if (cdomain == null) {
	cdomain = RegisteredDomain.from(a)
	.map(RegisteredDomain::name)
	.orElse(a);
	}
	if (hdomain == null) {
	hdomain = RegisteredDomain.from(b)
	.map(RegisteredDomain::name)
	.orElse(b);
	}

	return cdomain.length() != 0 && hdomain.length() != 0
	&& cdomain.equals(hdomain);
	}

	private boolean authorized(String cname, byte[] addr) {
	if (addr.length == 4)
	return authorizedIPv4(cname, addr);
	else if (addr.length == 16)
	return authorizedIPv6(cname, addr);
	else
	return false;
	}

	private boolean authorizedIPv4(String cname, byte[] addr) {
	String authHost = "";
	InetAddress auth;

	try {
	authHost = "auth." +
	(addr[3] & 0xff) + "." + (addr[2] & 0xff) + "." +
	(addr[1] & 0xff) + "." + (addr[0] & 0xff) +
	".in-addr.arpa";
	// Following check seems unnecessary
	// auth = InetAddress.getAllByName0(authHost, false)[0];
	authHost = hostname + '.' + authHost;
	auth = InetAddress.getAllByName0(authHost, false)[0];
	if (auth.equals(InetAddress.getByAddress(addr))) {
	return true;
	}
	Debug debug = getDebug();
	if (debug != null && Debug.isOn("failure")) {
	debug.println("socket access restriction: IP address of " + auth + " != " + InetAddress.getByAddress(addr));
	}
	} catch (UnknownHostException uhe) {
	Debug debug = getDebug();
	if (debug != null && Debug.isOn("failure")) {
	debug.println("socket access restriction: forward lookup failed for " + authHost);
	}
	}
	return false;
	}

	private boolean authorizedIPv6(String cname, byte[] addr) {
	String authHost = "";
	InetAddress auth;

	try {
	StringBuilder sb = new StringBuilder(39);

	for (int i = 15; i >= 0; i--) {
	sb.append(Integer.toHexString(((addr[i]) & 0x0f)));
	sb.append('.');
	sb.append(Integer.toHexString(((addr[i] >> 4) & 0x0f)));
	sb.append('.');
	}
	authHost = "auth." + sb.toString() + "IP6.ARPA";
	//auth = InetAddress.getAllByName0(authHost, false)[0];
	authHost = hostname + '.' + authHost;
	auth = InetAddress.getAllByName0(authHost, false)[0];
	if (auth.equals(InetAddress.getByAddress(addr)))
	return true;
	Debug debug = getDebug();
	if (debug != null && Debug.isOn("failure")) {
	debug.println("socket access restriction: IP address of " + auth + " != " + InetAddress.getByAddress(addr));
	}
	} catch (UnknownHostException uhe) {
	Debug debug = getDebug();
	if (debug != null && Debug.isOn("failure")) {
	debug.println("socket access restriction: forward lookup failed for " + authHost);
	}
	}
	return false;
	}


	/**
	* get IP addresses. Sets invalid to true if we can't get them.
	*
	*/
	void getIP()
	throws UnknownHostException
	{
	if (addresses != null \|\| wildcard \|\| invalid) return;

	try {
	// now get all the IP addresses
	String host;
	if (getName().charAt(0) == '[') {
	// Literal IPv6 address
	host = getName().substring(1, getName().indexOf(']'));
	} else {
	int i = getName().indexOf(':');
	if (i == -1)
	host = getName();
	else {
	host = getName().substring(0,i);
	}
	}

	addresses =
	new InetAddress[] {InetAddress.getAllByName0(host, false)[0]};

	} catch (UnknownHostException uhe) {
	invalid = true;
	throw uhe;
	} catch (IndexOutOfBoundsException iobe) {
	invalid = true;
	throw new UnknownHostException(getName());
	}
	}

	/**
	* Checks if this socket permission object "implies" the
	* specified permission.
	* <P>
	* More specifically, this method first ensures that all of the following
	* are true (and returns false if any of them are not):
	* <ul>
	* <li> <i>p</i> is an instanceof SocketPermission,
	* <li> <i>p</i>'s actions are a proper subset of this
	* object's actions, and
	* <li> <i>p</i>'s port range is included in this port range. Note:
	* port range is ignored when p only contains the action, 'resolve'.
	* </ul>
	*
	* Then {@code implies} checks each of the following, in order,
	* and for each returns true if the stated condition is true:
	* <ul>
	* <li> If this object was initialized with a single IP address and one of <i>p</i>'s
	* IP addresses is equal to this object's IP address.
	* <li>If this object is a wildcard domain (such as *.sun.com), and
	* <i>p</i>'s canonical name (the name without any preceding *)
	* ends with this object's canonical host name. For example, *.sun.com
	* implies *.eng.sun.com.
	* <li>If this object was not initialized with a single IP address, and one of this
	* object's IP addresses equals one of <i>p</i>'s IP addresses.
	* <li>If this canonical name equals <i>p</i>'s canonical name.
	* </ul>
	*
	* If none of the above are true, {@code implies} returns false.
	* @param p the permission to check against.
	*
	* @return true if the specified permission is implied by this object,
	* false if not.
	*/
	@Override
	public boolean implies(Permission p) {
	int i,j;

	if (!(p instanceof SocketPermission))
	return false;

	if (p == this)
	return true;

	SocketPermission that = (SocketPermission) p;

	return ((this.mask & that.mask) == that.mask) &&
	impliesIgnoreMask(that);
	}

	/**
	* Checks if the incoming Permission's action are a proper subset of
	* the this object's actions.
	* <P>
	* Check, in the following order:
	* <ul>
	* <li> Checks that "p" is an instanceof a SocketPermission
	* <li> Checks that "p"'s actions are a proper subset of the
	* current object's actions.
	* <li> Checks that "p"'s port range is included in this port range
	* <li> If this object was initialized with an IP address, checks that
	* one of "p"'s IP addresses is equal to this object's IP address.
	* <li> If either object is a wildcard domain (i.e., "*.sun.com"),
	* attempt to match based on the wildcard.
	* <li> If this object was not initialized with an IP address, attempt
	* to find a match based on the IP addresses in both objects.
	* <li> Attempt to match on the canonical hostnames of both objects.
	* </ul>
	* @param that the incoming permission request
	*
	* @return true if "permission" is a proper subset of the current object,
	* false if not.
	*/
	boolean impliesIgnoreMask(SocketPermission that) {
	int i,j;

	if ((that.mask & RESOLVE) != that.mask) {

	// check simple port range
	if ((that.portrange[0] < this.portrange[0]) \|\|
	(that.portrange[1] > this.portrange[1])) {

	// if either includes the ephemeral range, do full check
	if (this.includesEphemerals() \|\| that.includesEphemerals()) {
	if (!inRange(this.portrange[0], this.portrange[1],
	that.portrange[0], that.portrange[1]))
	{
	return false;
	}
	} else {
	return false;
	}
	}
	}

	// allow a "*" wildcard to always match anything
	if (this.wildcard && "".equals(this.cname))
	return true;

	// return if either one of these NetPerm objects are invalid...
	if (this.invalid \|\| that.invalid) {
	return compareHostnames(that);
	}

	try {
	if (this.init_with_ip) { // we only check IP addresses
	if (that.wildcard)
	return false;

	if (that.init_with_ip) {
	return (this.addresses[0].equals(that.addresses[0]));
	} else {
	if (that.addresses == null) {
	that.getIP();
	}
	for (i=0; i < that.addresses.length; i++) {
	if (this.addresses[0].equals(that.addresses[i]))
	return true;
	}
	}
	// since "this" was initialized with an IP address, we
	// don't check any other cases
	return false;
	}

	// check and see if we have any wildcards...
	if (this.wildcard \|\| that.wildcard) {
	// if they are both wildcards, return true iff
	// that's cname ends with this cname (i.e., *.sun.com
	// implies *.eng.sun.com)
	if (this.wildcard && that.wildcard)
	return (that.cname.endsWith(this.cname));

	// a non-wildcard can't imply a wildcard
	if (that.wildcard)
	return false;

	// this is a wildcard, lets see if that's cname ends with
	// it...
	if (that.cname == null) {
	that.getCanonName();
	}
	return (that.cname.endsWith(this.cname));
	}

	// comapare IP addresses
	if (this.addresses == null) {
	this.getIP();
	}

	if (that.addresses == null) {
	that.getIP();
	}

	if (!(that.init_with_ip && this.isUntrusted())) {
	for (j = 0; j < this.addresses.length; j++) {
	for (i=0; i < that.addresses.length; i++) {
	if (this.addresses[j].equals(that.addresses[i]))
	return true;
	}
	}

	// XXX: if all else fails, compare hostnames?
	// Do we really want this?
	if (this.cname == null) {
	this.getCanonName();
	}

	if (that.cname == null) {
	that.getCanonName();
	}

	return (this.cname.equalsIgnoreCase(that.cname));
	}

	} catch (UnknownHostException uhe) {
	return compareHostnames(that);
	}

	// make sure the first thing that is done here is to return
	// false. If not, uncomment the return false in the above catch.

	return false;
	}

	private boolean compareHostnames(SocketPermission that) {
	// we see if the original names/IPs passed in were equal.

	String thisHost = hostname;
	String thatHost = that.hostname;

	if (thisHost == null) {
	return false;
	} else if (this.wildcard) {
	final int cnameLength = this.cname.length();
	return thatHost.regionMatches(true,
	(thatHost.length() - cnameLength),
	this.cname, 0, cnameLength);
	} else {
	return thisHost.equalsIgnoreCase(thatHost);
	}
	}

	/**
	* Checks two SocketPermission objects for equality.
	*
	* @param obj the object to test for equality with this object.
	*
	* @return true if <i>obj</i> is a SocketPermission, and has the
	* same hostname, port range, and actions as this
	* SocketPermission object. However, port range will be ignored
	* in the comparison if <i>obj</i> only contains the action, 'resolve'.
	*/
	@Override
	public boolean equals(Object obj) {
	if (obj == this)
	return true;

	if (! (obj instanceof SocketPermission))
	return false;

	SocketPermission that = (SocketPermission) obj;

	//this is (overly?) complex!!!

	// check the mask first
	if (this.mask != that.mask) return false;

	if ((that.mask & RESOLVE) != that.mask) {
	// now check the port range...
	if ((this.portrange[0] != that.portrange[0]) \|\|
	(this.portrange[1] != that.portrange[1])) {
	return false;
	}
	}

	// short cut. This catches:
	// "crypto" equal to "crypto", or
	// "1.2.3.4" equal to "1.2.3.4.", or
	// ".edu" equal to ".edu", but it
	// does not catch "crypto" equal to
	// "crypto.eng.sun.com".

	if (this.getName().equalsIgnoreCase(that.getName())) {
	return true;
	}

	// we now attempt to get the Canonical (FQDN) name and
	// compare that. If this fails, about all we can do is return
	// false.

	try {
	this.getCanonName();
	that.getCanonName();
	} catch (UnknownHostException uhe) {
	return false;
	}

	if (this.invalid \|\| that.invalid)
	return false;

	if (this.cname != null) {
	return this.cname.equalsIgnoreCase(that.cname);
	}

	return false;
	}

	/**
	* Returns the hash code value for this object.
	*
	* @return a hash code value for this object.
	*/
	@Override
	public int hashCode() {
	/*
	* If this SocketPermission was initialized with an IP address
	* or a wildcard, use getName().hashCode(), otherwise use
	* the hashCode() of the host name returned from
	* java.net.InetAddress.getHostName method.
	*/

	if (init_with_ip \|\| wildcard) {
	return this.getName().hashCode();
	}

	try {
	getCanonName();
	} catch (UnknownHostException uhe) {

	}

	if (invalid \|\| cname == null)
	return this.getName().hashCode();
	else
	return this.cname.hashCode();
	}

	/**
	* Return the current action mask.
	*
	* @return the actions mask.
	*/

	int getMask() {
	return mask;
	}

	/**
	* Returns the "canonical string representation" of the actions in the
	* specified mask.
	* Always returns present actions in the following order:
	* connect, listen, accept, resolve.
	*
	* @param mask a specific integer action mask to translate into a string
	* @return the canonical string representation of the actions
	*/
	private static String getActions(int mask) {
	StringJoiner sj = new StringJoiner(",");
	if ((mask & CONNECT) == CONNECT) {
	sj.add("connect");
	}
	if ((mask & LISTEN) == LISTEN) {
	sj.add("listen");
	}
	if ((mask & ACCEPT) == ACCEPT) {
	sj.add("accept");
	}
	if ((mask & RESOLVE) == RESOLVE) {
	sj.add("resolve");
	}
	return sj.toString();
	}

	/**
	* Returns the canonical string representation of the actions.
	* Always returns present actions in the following order:
	* connect, listen, accept, resolve.
	*
	* @return the canonical string representation of the actions.
	*/
	@Override
	public String getActions()
	{
	if (actions == null)
	actions = getActions(this.mask);

	return actions;
	}

	/**
	* Returns a new PermissionCollection object for storing SocketPermission
	* objects.
	* <p>
	* SocketPermission objects must be stored in a manner that allows them
	* to be inserted into the collection in any order, but that also enables the
	* PermissionCollection {@code implies}
	* method to be implemented in an efficient (and consistent) manner.
	*
	* @return a new PermissionCollection object suitable for storing SocketPermissions.
	*/
	@Override
	public PermissionCollection newPermissionCollection() {
	return new SocketPermissionCollection();
	}

	/**
	* WriteObject is called to save the state of the SocketPermission
	* to a stream. The actions are serialized, and the superclass
	* takes care of the name.
	*/
	private synchronized void writeObject(java.io.ObjectOutputStream s)
	throws IOException
	{
	// Write out the actions. The superclass takes care of the name
	// call getActions to make sure actions field is initialized
	if (actions == null)
	getActions();
	s.defaultWriteObject();
	}

	/**
	* readObject is called to restore the state of the SocketPermission from
	* a stream.
	*/
	private synchronized void readObject(java.io.ObjectInputStream s)
	throws IOException, ClassNotFoundException
	{
	// Read in the action, then initialize the rest
	s.defaultReadObject();
	init(getName(),getMask(actions));
	}

	/**
	* Check the system/security property for the ephemeral port range
	* for this system. The suffix is either "high" or "low"
	*/
	private static int initEphemeralPorts(String suffix, int defval) {
	return AccessController.doPrivileged(
	new PrivilegedAction<>(){
	public Integer run() {
	int val = Integer.getInteger(
	"jdk.net.ephemeralPortRange."+suffix, -1
	);
	if (val != -1) {
	return val;
	} else {
	return suffix.equals("low") ?
	PortConfig.getLower() : PortConfig.getUpper();
	}
	}
	}
	);
	}

	/**
	* Check if the target range is within the policy range
	* together with the ephemeral range for this platform
	* (if policy includes ephemeral range)
	*/
	private static boolean inRange(
	int policyLow, int policyHigh, int targetLow, int targetHigh
	)
	{
	final int ephemeralLow = EphemeralRange.low;
	final int ephemeralHigh = EphemeralRange.high;

	if (targetLow == 0) {
	// check policy includes ephemeral range
	if (!inRange(policyLow, policyHigh, ephemeralLow, ephemeralHigh)) {
	return false;
	}
	if (targetHigh == 0) {
	// nothing left to do
	return true;
	}
	// continue check with first real port number
	targetLow = 1;
	}

	if (policyLow == 0 && policyHigh == 0) {
	// ephemeral range only
	return targetLow >= ephemeralLow && targetHigh <= ephemeralHigh;
	}

	if (policyLow != 0) {
	// simple check of policy only
	return targetLow >= policyLow && targetHigh <= policyHigh;
	}

	// policyLow == 0 which means possibly two ranges to check

	// first check if policy and ephem range overlap/contiguous

	if (policyHigh >= ephemeralLow - 1) {
	return targetHigh <= ephemeralHigh;
	}

	// policy and ephem range do not overlap

	// target range must lie entirely inside policy range or eph range

	return (targetLow <= policyHigh && targetHigh <= policyHigh) \|\|
	(targetLow >= ephemeralLow && targetHigh <= ephemeralHigh);
	}
	/*
	public String toString()
	{
	StringBuffer s = new StringBuffer(super.toString() + "\n" +
	"cname = " + cname + "\n" +
	"wildcard = " + wildcard + "\n" +
	"invalid = " + invalid + "\n" +
	"portrange = " + portrange[0] + "," + portrange[1] + "\n");
	if (addresses != null) for (int i=0; i<addresses.length; i++) {
	s.append( addresses[i].getHostAddress());
	s.append("\n");
	} else {
	s.append("(no addresses)\n");
	}

	return s.toString();
	}

	public static void main(String args[]) throws Exception {
	SocketPermission this_ = new SocketPermission(args[0], "connect");
	SocketPermission that_ = new SocketPermission(args[1], "connect");
	System.out.println("-----\n");
	System.out.println("this.implies(that) = " + this_.implies(that_));
	System.out.println("-----\n");
	System.out.println("this = "+this_);
	System.out.println("-----\n");
	System.out.println("that = "+that_);
	System.out.println("-----\n");

	SocketPermissionCollection nps = new SocketPermissionCollection();
	nps.add(this_);
	nps.add(new SocketPermission("www-leland.stanford.edu","connect"));
	nps.add(new SocketPermission("www-sun.com","connect"));
	System.out.println("nps.implies(that) = " + nps.implies(that_));
	System.out.println("-----\n");
	}
	*/
	}

	/**

	if (init'd with IP, key is IP as string)
	if wildcard, its the wild card
	else its the cname?

	*
	* @see java.security.Permission
	* @see java.security.Permissions
	* @see java.security.PermissionCollection
	*
	*
	* @author Roland Schemers
	*
	* @serial include
	*/

	final class SocketPermissionCollection extends PermissionCollection
	implements Serializable
	{
	// Not serialized; see serialization section at end of class
	// A ConcurrentSkipListMap is used to preserve order, so that most
	// recently added permissions are checked first (see JDK-4301064).
	private transient ConcurrentSkipListMap<String, SocketPermission> perms;

	/**
	* Create an empty SocketPermissions object.
	*
	*/
	public SocketPermissionCollection() {
	perms = new ConcurrentSkipListMap<>(new SPCComparator());
	}

	/**
	* Adds a permission to the SocketPermissions. The key for the hash is
	* the name in the case of wildcards, or all the IP addresses.
	*
	* @param permission the Permission object to add.
	*
	* @exception IllegalArgumentException - if the permission is not a
	* SocketPermission
	*
	* @exception SecurityException - if this SocketPermissionCollection object
	* has been marked readonly
	*/
	@Override
	public void add(Permission permission) {
	if (! (permission instanceof SocketPermission))
	throw new IllegalArgumentException("invalid permission: "+
	permission);
	if (isReadOnly())
	throw new SecurityException(
	"attempt to add a Permission to a readonly PermissionCollection");

	SocketPermission sp = (SocketPermission)permission;

	// Add permission to map if it is absent, or replace with new
	// permission if applicable. NOTE: cannot use lambda for
	// remappingFunction parameter until JDK-8076596 is fixed.
	perms.merge(sp.getName(), sp,
	new java.util.function.BiFunction<>() {
	@Override
	public SocketPermission apply(SocketPermission existingVal,
	SocketPermission newVal) {
	int oldMask = existingVal.getMask();
	int newMask = newVal.getMask();
	if (oldMask != newMask) {
	int effective = oldMask \| newMask;
	if (effective == newMask) {
	return newVal;
	}
	if (effective != oldMask) {
	return new SocketPermission(sp.getName(),
	effective);
	}
	}
	return existingVal;
	}
	}
	);
	}

	/**
	* Check and see if this collection of permissions implies the permissions
	* expressed in "permission".
	*
	* @param permission the Permission object to compare
	*
	* @return true if "permission" is a proper subset of a permission in
	* the collection, false if not.
	*/
	@Override
	public boolean implies(Permission permission)
	{
	if (! (permission instanceof SocketPermission))
	return false;

	SocketPermission np = (SocketPermission) permission;

	int desired = np.getMask();
	int effective = 0;
	int needed = desired;

	//System.out.println("implies "+np);
	for (SocketPermission x : perms.values()) {
	//System.out.println(" trying "+x);
	if (((needed & x.getMask()) != 0) && x.impliesIgnoreMask(np)) {
	effective \|= x.getMask();
	if ((effective & desired) == desired) {
	return true;
	}
	needed = (desired ^ effective);
	}
	}
	return false;
	}

	/**
	* Returns an enumeration of all the SocketPermission objects in the
	* container.
	*
	* @return an enumeration of all the SocketPermission objects.
	*/
	@Override
	@SuppressWarnings("unchecked")
	public Enumeration<Permission> elements() {
	return (Enumeration)Collections.enumeration(perms.values());
	}

	private static final long serialVersionUID = 2787186408602843674L;

	// Need to maintain serialization interoperability with earlier releases,
	// which had the serializable field:

	//
	// The SocketPermissions for this set.
	// @serial
	//
	// private Vector permissions;

	/**
	* @serialField permissions java.util.Vector
	* A list of the SocketPermissions for this set.
	*/
	private static final ObjectStreamField[] serialPersistentFields = {
	new ObjectStreamField("permissions", Vector.class),
	};

	/**
	* @serialData "permissions" field (a Vector containing the SocketPermissions).
	*/
	/*
	* Writes the contents of the perms field out as a Vector for
	* serialization compatibility with earlier releases.
	*/
	private void writeObject(ObjectOutputStream out) throws IOException {
	// Don't call out.defaultWriteObject()

	// Write out Vector
	Vector<SocketPermission> permissions = new Vector<>(perms.values());

	ObjectOutputStream.PutField pfields = out.putFields();
	pfields.put("permissions", permissions);
	out.writeFields();
	}

	/*
	* Reads in a Vector of SocketPermissions and saves them in the perms field.
	*/
	private void readObject(ObjectInputStream in)
	throws IOException, ClassNotFoundException
	{
	// Don't call in.defaultReadObject()

	// Read in serialized fields
	ObjectInputStream.GetField gfields = in.readFields();

	// Get the one we want
	@SuppressWarnings("unchecked")
	Vector<SocketPermission> permissions = (Vector<SocketPermission>)gfields.get("permissions", null);
	perms = new ConcurrentSkipListMap<>(new SPCComparator());
	for (SocketPermission sp : permissions) {
	perms.put(sp.getName(), sp);
	}
	}

	/**
	* A simple comparator that orders new non-equal entries at the beginning.
	*/
	private static class SPCComparator implements Comparator<String> {
	@Override
	public int compare(String s1, String s2) {
	if (s1.equals(s2)) {
	return 0;
	}
	return -1;
	}
	}
	}

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