/*
?*?Copyright?（C）?2010?The?Android?Open?Source?Project
?*
?*?Licensed?under?the?Apache?License?Version?2.0?（the?“License“）;
?*?you?may?not?use?this?file?except?in?compliance?with?the?License.
?*?You?may?obtain?a?copy?of?the?License?at
?*
?*??????http://www.apache.org/licenses/LICENSE-2.0
?*
?*?Unless?required?by?applicable?law?or?agreed?to?in?writing?software
?*?distributed?under?the?License?is?distributed?on?an?“AS?IS“?BASIS
?*?WITHOUT?WARRANTIES?OR?CONDITIONS?OF?ANY?KIND?either?express?or?implied.
?*?See?the?License?for?the?specific?language?governing?permissions?and
?*?limitations?under?the?License.
?*/

package?android.net;

import?android.text.TextUtils;
import?android.util.Log;

import?java.net.Inet4Address;
import?java.net.InetAddress;
import?java.util.ArrayList;
import?java.util.Collection;
import?java.util.Collections;

/**
?*?A?simple?object?for?retrieving?the?results?of?a?DHCP?request.
?*?Replaces?（internally）?the?IPv4-only?DhcpInfo?class.
?*?@hide
?*/
public?class?DhcpInfoInternal?{
????private?final?static?String?TAG?=?“DhcpInfoInternal“;
????public?String?ipAddress;
????public?int?prefixLength;

????public?String?dns1;
????public?String?dns2;

????public?String?serverAddress;
????public?int?leaseDuration;

????/**
?????*?Vendor?specific?information?（from?RFC?2132）.
?????*/
????public?String?vendorInfo;

????private?Collection?mRoutes;

????public?DhcpInfoInternal（）?{
????????mRoutes?=?new?ArrayList（）;
????}

????public?void?addRoute（RouteInfo?routeInfo）?{
????????mRoutes.add（routeInfo）;
????}

????public?Collection?getRoutes（）?{
????????return?Collections.unmodifiableCollection（mRoutes）;
????}

????private?int?convertToInt（String?addr）?{
????????if?（addr?!=?null）?{
????????????try?{
????????????????InetAddress?inetAddress?=?NetworkUtils.numericToInetAddress（addr）;
????????????????if?（inetAddress?instanceof?Inet4Address）?{
????????????????????return?NetworkUtils.inetAddressToInt（（Inet4Address）inetAddress）;
????????????????}
????????????}?catch?（IllegalArgumentException?e）?{}
????????}
????????return?0;
????}

????public?DhcpInfo?makeDhcpInfo（）?{
????????DhcpInfo?info?=?new?DhcpInfo（）;
????????info.ipAddress?=?convertToInt（ipAddress）;
????????for?（RouteInfo?route?:?mRoutes）?{
????????????if?（route.isDefaultRoute（））?{
????????????????info.gateway?=?convertToInt（route.getGateway（）.getHostAddress（））;
????????????????break;
????????????}
????????}
????????try?{
????????????InetAddress?inetAddress?=?NetworkUtils.numericToInetAddress（ipAddress）;
????????????info.netmask?=?NetworkUtils.prefixLeng