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	/*
	* Copyright (c) 2013, 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.net.*;
	import java.util.Formatter;
	import java.util.Locale;
	import sun.net.util.IPAddressUtil;

	/**
	* Parses a string containing a host/domain name and port range
	*/
	class HostPortrange {

	String hostname;
	String scheme;
	int[] portrange;

	boolean wildcard;
	boolean literal;
	boolean ipv6, ipv4;
	static final int PORT_MIN = 0;
	static final int PORT_MAX = (1 << 16) -1;

	boolean equals(HostPortrange that) {
	return this.hostname.equals(that.hostname)
	&& this.portrange[0] == that.portrange[0]
	&& this.portrange[1] == that.portrange[1]
	&& this.wildcard == that.wildcard
	&& this.literal == that.literal;
	}

	public int hashCode() {
	return hostname.hashCode() + portrange[0] + portrange[1];
	}

	HostPortrange(String scheme, String str) {
	// 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.

	// first separate string into two fields: hoststr, portstr
	String hoststr, portstr = null;
	this.scheme = scheme;

	// check for IPv6 address
	if (str.charAt(0) == '[') {
	ipv6 = literal = true;
	int rb = str.indexOf(']');
	if (rb != -1) {
	hoststr = str.substring(1, rb);
	} else {
	throw new IllegalArgumentException("invalid IPv6 address: " + str);
	}
	int sep = str.indexOf(':', rb + 1);
	if (sep != -1 && str.length() > sep) {
	portstr = str.substring(sep + 1);
	}
	// need to normalize hoststr now
	byte[] ip = IPAddressUtil.textToNumericFormatV6(hoststr);
	if (ip == null) {
	throw new IllegalArgumentException("illegal IPv6 address");
	}
	StringBuilder sb = new StringBuilder();
	Formatter formatter = new Formatter(sb, Locale.US);
	formatter.format("%02x%02x:%02x%02x:%02x%02x:%02x"
	+ "%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x",
	ip[0], ip[1], ip[2], ip[3], ip[4], ip[5], ip[6], ip[7], ip[8],
	ip[9], ip[10], ip[11], ip[12], ip[13], ip[14], ip[15]);
	hostname = sb.toString();
	} else {
	// not IPv6 therefore ':' is the port separator

	int sep = str.indexOf(':');
	if (sep != -1 && str.length() > sep) {
	hoststr = str.substring(0, sep);
	portstr = str.substring(sep + 1);
	} else {
	hoststr = sep == -1 ? str : str.substring(0, sep);
	}
	// is this a domain wildcard specification?
	if (hoststr.lastIndexOf('*') > 0) {
	throw new IllegalArgumentException("invalid host wildcard specification");
	} else if (hoststr.startsWith("*")) {
	wildcard = true;
	if (hoststr.equals("*")) {
	hoststr = "";
	} else if (hoststr.startsWith("*.")) {
	hoststr = toLowerCase(hoststr.substring(1));
	} else {
	throw new IllegalArgumentException("invalid host wildcard specification");
	}
	} else {
	// check if ipv4 (if rightmost label a number)
	// The normal way to specify ipv4 is 4 decimal labels
	// but actually three, two or single label formats valid also
	// So, we recognise ipv4 by just testing the rightmost label
	// being a number.
	int lastdot = hoststr.lastIndexOf('.');
	if (lastdot != -1 && (hoststr.length() > 1)) {
	boolean ipv4 = true;

	for (int i = lastdot + 1, len = hoststr.length(); i < len; i++) {
	char c = hoststr.charAt(i);
	if (c < '0' \|\| c > '9') {
	ipv4 = false;
	break;
	}
	}
	this.ipv4 = this.literal = ipv4;
	if (ipv4) {
	byte[] ip = IPAddressUtil.textToNumericFormatV4(hoststr);
	if (ip == null) {
	throw new IllegalArgumentException("illegal IPv4 address");
	}
	StringBuilder sb = new StringBuilder();
	Formatter formatter = new Formatter(sb, Locale.US);
	formatter.format("%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
	hoststr = sb.toString();
	} else {
	// regular domain name
	hoststr = toLowerCase(hoststr);
	}
	}
	}
	hostname = hoststr;
	}

	try {
	portrange = parsePort(portstr);
	} catch (Exception e) {
	throw new IllegalArgumentException("invalid port range: " + portstr);
	}
	}

	static final int CASE_DIFF = 'A' - 'a';

	/**
	* Convert to lower case, and check that all chars are ascii
	* alphanumeric, '-' or '.' only.
	*/
	static String toLowerCase(String s) {
	int len = s.length();
	StringBuilder sb = null;

	for (int i=0; i<len; i++) {
	char c = s.charAt(i);
	if ((c >= 'a' && c <= 'z') \|\| (c == '.')) {
	if (sb != null)
	sb.append(c);
	} else if ((c >= '0' && c <= '9') \|\| (c == '-')) {
	if (sb != null)
	sb.append(c);
	} else if (c >= 'A' && c <= 'Z') {
	if (sb == null) {
	sb = new StringBuilder(len);
	sb.append(s, 0, i);
	}
	sb.append((char)(c - CASE_DIFF));
	} else {
	throw new IllegalArgumentException("Invalid characters in hostname");
	}
	}
	return sb == null ? s : sb.toString();
	}


	public boolean literal() {
	return literal;
	}

	public boolean ipv4Literal() {
	return ipv4;
	}

	public boolean ipv6Literal() {
	return ipv6;
	}

	public String hostname() {
	return hostname;
	}

	public int[] portrange() {
	return portrange;
	}

	/**
	* returns true if the hostname part started with *
	* hostname returns the remaining part of the host component
	* eg ".foo.com" -> ".foo.com" or "" -> ""
	*
	* @return
	*/
	public boolean wildcard() {
	return wildcard;
	}

	// these shouldn't leak outside the implementation
	final static int[] HTTP_PORT = {80, 80};
	final static int[] HTTPS_PORT = {443, 443};
	final static int[] NO_PORT = {-1, -1};

	int[] defaultPort() {
	if (scheme.equals("http")) {
	return HTTP_PORT;
	} else if (scheme.equals("https")) {
	return HTTPS_PORT;
	}
	return NO_PORT;
	}

	int[] parsePort(String port)
	{

	if (port == null \|\| port.equals("")) {
	return defaultPort();
	}

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

	try {
	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) {
	return defaultPort();
	}
	return new int[] {l, h};
	}
	} catch (IllegalArgumentException e) {
	return defaultPort();
	}
	}
	}

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