344 lines
10 KiB
Java
344 lines
10 KiB
Java
/*
|
|
* Copyright 2018 Hippo Seven
|
|
*
|
|
* 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 com.hippo.ehviewer;
|
|
|
|
/*
|
|
* Created by Hippo on 2018/3/21.
|
|
*/
|
|
|
|
import android.content.ContentValues;
|
|
import android.content.Context;
|
|
import android.database.Cursor;
|
|
import android.database.sqlite.SQLiteDatabase;
|
|
import android.database.sqlite.SQLiteOpenHelper;
|
|
import android.util.Pair;
|
|
|
|
import androidx.annotation.Nullable;
|
|
|
|
import com.hippo.ehviewer.database.MSQLiteBuilder;
|
|
import com.hippo.ehviewer.util.SqlUtils;
|
|
|
|
import java.net.InetAddress;
|
|
import java.net.UnknownHostException;
|
|
import java.util.ArrayList;
|
|
import java.util.List;
|
|
|
|
public class Hosts {
|
|
|
|
private static final int VERSION_1 = 1;
|
|
private static final String TABLE_HOSTS = "HOSTS";
|
|
private static final String COLUMN_HOST = "HOST";
|
|
private static final String COLUMN_IP = "IP";
|
|
|
|
private static final int DB_VERSION = VERSION_1;
|
|
|
|
private final SQLiteDatabase db;
|
|
|
|
public Hosts(Context context, String name) {
|
|
SQLiteOpenHelper helper = new MSQLiteBuilder()
|
|
.version(VERSION_1)
|
|
.createTable(TABLE_HOSTS)
|
|
.insertColumn(TABLE_HOSTS, COLUMN_HOST, String.class)
|
|
.insertColumn(TABLE_HOSTS, COLUMN_IP, String.class)
|
|
.build(context, name, DB_VERSION);
|
|
db = helper.getWritableDatabase();
|
|
}
|
|
|
|
@Nullable
|
|
public static InetAddress toInetAddress(String host, String ip) {
|
|
if (!isValidHost(host)) {
|
|
return null;
|
|
}
|
|
|
|
if (ip == null) {
|
|
return null;
|
|
}
|
|
|
|
byte[] bytes = parseV4(ip);
|
|
if (bytes == null) {
|
|
bytes = parseV6(ip);
|
|
}
|
|
if (bytes == null) {
|
|
return null;
|
|
}
|
|
|
|
try {
|
|
return InetAddress.getByAddress(host, bytes);
|
|
} catch (UnknownHostException e) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns true if the host is valid.
|
|
*/
|
|
public static boolean isValidHost(String host) {
|
|
if (host == null) {
|
|
return false;
|
|
}
|
|
|
|
if (host.length() > 253) {
|
|
return false;
|
|
}
|
|
|
|
int labelLength = 0;
|
|
for (int i = 0, n = host.length(); i < n; i++) {
|
|
char ch = host.charAt(i);
|
|
|
|
if (ch == '.') {
|
|
if (labelLength < 1 || labelLength > 63) {
|
|
return false;
|
|
}
|
|
labelLength = 0;
|
|
} else {
|
|
labelLength++;
|
|
}
|
|
|
|
if ((ch < 'a' || ch > 'z') && (ch < '0' || ch > '9') && ch != '-' && ch != '.') {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return labelLength >= 1 && labelLength <= 63;
|
|
}
|
|
|
|
/**
|
|
* Returns true if ips are valid.
|
|
*/
|
|
public static boolean isValidIp(String ips) {
|
|
if (ips == null) {
|
|
return false;
|
|
}
|
|
String[] list = ips.split("\\+");
|
|
for (String ip : list) {
|
|
if (parseV4(ip) == null && parseV6(ip) == null) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// org.xbill.DNS.Address.parseV4
|
|
@Nullable
|
|
private static byte[] parseV4(String s) {
|
|
int numDigits;
|
|
int currentOctet;
|
|
byte[] values = new byte[4];
|
|
int currentValue;
|
|
int length = s.length();
|
|
|
|
currentOctet = 0;
|
|
currentValue = 0;
|
|
numDigits = 0;
|
|
for (int i = 0; i < length; i++) {
|
|
char c = s.charAt(i);
|
|
if (c >= '0' && c <= '9') {
|
|
/* Can't have more than 3 digits per octet. */
|
|
if (numDigits == 3)
|
|
return null;
|
|
/* Octets shouldn't start with 0, unless they are 0. */
|
|
if (numDigits > 0 && currentValue == 0)
|
|
return null;
|
|
numDigits++;
|
|
currentValue *= 10;
|
|
currentValue += (c - '0');
|
|
/* 255 is the maximum value for an octet. */
|
|
if (currentValue > 255)
|
|
return null;
|
|
} else if (c == '.') {
|
|
/* Can't have more than 3 dots. */
|
|
if (currentOctet == 3)
|
|
return null;
|
|
/* Two consecutive dots are bad. */
|
|
if (numDigits == 0)
|
|
return null;
|
|
values[currentOctet++] = (byte) currentValue;
|
|
currentValue = 0;
|
|
numDigits = 0;
|
|
} else
|
|
return null;
|
|
}
|
|
/* Must have 4 octets. */
|
|
if (currentOctet != 3)
|
|
return null;
|
|
/* The fourth octet can't be empty. */
|
|
if (numDigits == 0)
|
|
return null;
|
|
values[currentOctet] = (byte) currentValue;
|
|
return values;
|
|
}
|
|
|
|
// org.xbill.DNS.Address.parseV6
|
|
@Nullable
|
|
private static byte[] parseV6(String s) {
|
|
int range = -1;
|
|
byte[] data = new byte[16];
|
|
|
|
String[] tokens = s.split(":", -1);
|
|
|
|
int first = 0;
|
|
int last = tokens.length - 1;
|
|
|
|
if (tokens[0].length() == 0) {
|
|
// If the first two tokens are empty, it means the string
|
|
// started with ::, which is fine. If only the first is
|
|
// empty, the string started with :, which is bad.
|
|
if (last - first > 0 && tokens[1].length() == 0)
|
|
first++;
|
|
else
|
|
return null;
|
|
}
|
|
|
|
if (tokens[last].length() == 0) {
|
|
// If the last two tokens are empty, it means the string
|
|
// ended with ::, which is fine. If only the last is
|
|
// empty, the string ended with :, which is bad.
|
|
if (last - first > 0 && tokens[last - 1].length() == 0)
|
|
last--;
|
|
else
|
|
return null;
|
|
}
|
|
|
|
if (last - first + 1 > 8)
|
|
return null;
|
|
|
|
int i, j;
|
|
for (i = first, j = 0; i <= last; i++) {
|
|
if (tokens[i].length() == 0) {
|
|
if (range >= 0)
|
|
return null;
|
|
range = j;
|
|
continue;
|
|
}
|
|
|
|
if (tokens[i].indexOf('.') >= 0) {
|
|
// An IPv4 address must be the last component
|
|
if (i < last)
|
|
return null;
|
|
// There can't have been more than 6 components.
|
|
if (i > 6)
|
|
return null;
|
|
byte[] v4addr = parseV4(tokens[i]);
|
|
if (v4addr == null)
|
|
return null;
|
|
for (int k = 0; k < 4; k++)
|
|
data[j++] = v4addr[k];
|
|
break;
|
|
}
|
|
|
|
try {
|
|
for (int k = 0; k < tokens[i].length(); k++) {
|
|
char c = tokens[i].charAt(k);
|
|
if (Character.digit(c, 16) < 0)
|
|
return null;
|
|
}
|
|
int x = Integer.parseInt(tokens[i], 16);
|
|
if (x > 0xFFFF || x < 0)
|
|
return null;
|
|
data[j++] = (byte) (x >>> 8);
|
|
data[j++] = (byte) (x & 0xFF);
|
|
} catch (NumberFormatException e) {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
if (j < 16 && range < 0)
|
|
return null;
|
|
|
|
if (range >= 0) {
|
|
int empty = 16 - j;
|
|
System.arraycopy(data, range, data, range + empty, j - range);
|
|
for (i = range; i < range + empty; i++)
|
|
data[i] = 0;
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
/**
|
|
* Gets a InetAddress with the host.
|
|
*/
|
|
@Nullable
|
|
public List<InetAddress> get(String host) {
|
|
if (!isValidHost(host)) {
|
|
return null;
|
|
}
|
|
try (Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_HOSTS + " WHERE " + COLUMN_HOST + " = ?;", new String[]{host})) {
|
|
if (cursor.moveToNext()) {
|
|
String[] ips = SqlUtils.getString(cursor, COLUMN_IP, null).split("\\+");
|
|
List<InetAddress> addresses = new ArrayList<>();
|
|
for (String ip : ips) {
|
|
addresses.add(toInetAddress(host, ip));
|
|
}
|
|
return addresses;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
}
|
|
|
|
public boolean contains(String host) {
|
|
try (Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_HOSTS + " WHERE " + COLUMN_HOST + " = ?;", new String[]{host})) {
|
|
return cursor.moveToNext();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Puts the host-ip pair into this hosts.
|
|
*/
|
|
public boolean put(String host, String ip) {
|
|
if (!isValidHost(host) || !isValidIp(ip)) {
|
|
return false;
|
|
}
|
|
|
|
ContentValues values = new ContentValues();
|
|
values.put(COLUMN_HOST, host);
|
|
values.put(COLUMN_IP, ip);
|
|
|
|
if (contains(host)) {
|
|
db.update(TABLE_HOSTS, values, COLUMN_HOST + " = ?", new String[]{host});
|
|
} else {
|
|
db.insert(TABLE_HOSTS, null, values);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Puts delete the entry with the host.
|
|
*/
|
|
public void delete(String host) {
|
|
db.delete(TABLE_HOSTS, COLUMN_HOST + " = ?", new String[]{host});
|
|
}
|
|
|
|
/**
|
|
* Get all data from this host.
|
|
*/
|
|
public List<Pair<String, String>> getAll() {
|
|
List<Pair<String, String>> result = new ArrayList<>();
|
|
|
|
try (Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_HOSTS + ";", null)) {
|
|
while (cursor.moveToNext()) {
|
|
String host = SqlUtils.getString(cursor, COLUMN_HOST, null);
|
|
String ip = SqlUtils.getString(cursor, COLUMN_IP, null);
|
|
result.add(new Pair<>(host, ip));
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
}
|