feat(jdk8): move files to new folder to avoid resources compiled.

jdkSrc/jdk8/sun/net/util/IPAddressUtil.java

@@ -0,0 +1,741 @@
+/*
+ * Copyright (c) 2004, 2022, 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 sun.net.util;
+
+import java.net.URL;
+import java.nio.CharBuffer;
+import java.util.Arrays;
+
+import sun.security.action.GetPropertyAction;
+
+public class IPAddressUtil {
+    private final static int INADDR4SZ = 4;
+    private final static int INADDR16SZ = 16;
+    private final static int INT16SZ = 2;
+
+    /*
+     * Converts IPv4 address in its textual presentation form
+     * into its numeric binary form.
+     *
+     * @param src a String representing an IPv4 address in standard format
+     * @return a byte array representing the IPv4 numeric address
+     */
+    @SuppressWarnings("fallthrough")
+    public static byte[] textToNumericFormatV4(String src)
+    {
+        byte[] res = new byte[INADDR4SZ];
+
+        long tmpValue = 0;
+        int currByte = 0;
+        boolean newOctet = true;
+
+        int len = src.length();
+        if (len == 0 || len > 15) {
+            return null;
+        }
+        /*
+         * When only one part is given, the value is stored directly in
+         * the network address without any byte rearrangement.
+         *
+         * When a two part address is supplied, the last part is
+         * interpreted as a 24-bit quantity and placed in the right
+         * most three bytes of the network address. This makes the
+         * two part address format convenient for specifying Class A
+         * network addresses as net.host.
+         *
+         * When a three part address is specified, the last part is
+         * interpreted as a 16-bit quantity and placed in the right
+         * most two bytes of the network address. This makes the
+         * three part address format convenient for specifying
+         * Class B net- work addresses as 128.net.host.
+         *
+         * When four parts are specified, each is interpreted as a
+         * byte of data and assigned, from left to right, to the
+         * four bytes of an IPv4 address.
+         *
+         * We determine and parse the leading parts, if any, as single
+         * byte values in one pass directly into the resulting byte[],
+         * then the remainder is treated as a 8-to-32-bit entity and
+         * translated into the remaining bytes in the array.
+         */
+        for (int i = 0; i < len; i++) {
+            char c = src.charAt(i);
+            if (c == '.') {
+                if (newOctet || tmpValue < 0 || tmpValue > 0xff || currByte == 3) {
+                    return null;
+                }
+                res[currByte++] = (byte) (tmpValue & 0xff);
+                tmpValue = 0;
+                newOctet = true;
+            } else {
+                int digit = digit(c, 10);
+                if (digit < 0) {
+                    return null;
+                }
+                tmpValue *= 10;
+                tmpValue += digit;
+                newOctet = false;
+            }
+        }
+        if (newOctet || tmpValue < 0 || tmpValue >= (1L << ((4 - currByte) * 8))) {
+            return null;
+        }
+        switch (currByte) {
+            case 0:
+                res[0] = (byte) ((tmpValue >> 24) & 0xff);
+            case 1:
+                res[1] = (byte) ((tmpValue >> 16) & 0xff);
+            case 2:
+                res[2] = (byte) ((tmpValue >>  8) & 0xff);
+            case 3:
+                res[3] = (byte) ((tmpValue >>  0) & 0xff);
+        }
+        return res;
+    }
+
+    /**
+     * Validates if input string is a valid IPv4 address literal.
+     * If the "jdk.net.allowAmbiguousIPAddressLiterals" system property is set
+     * to {@code false}, or is not set then validation of the address string is performed as follows:
+     * If string can't be parsed by following IETF IPv4 address string literals
+     * formatting style rules (default one), but can be parsed by following BSD formatting
+     * style rules, the IPv4 address string content is treated as ambiguous and
+     * {@code IllegalArgumentException} is thrown.
+     *
+     * @param src input string
+     * @return bytes array if string is a valid IPv4 address string
+     * @throws IllegalArgumentException if "jdk.net.allowAmbiguousIPAddressLiterals" SP is set to
+     *                                  "false" and IPv4 address string {@code "src"} is ambiguous
+     */
+    public static byte[] validateNumericFormatV4(String src) {
+        byte[] parsedBytes = textToNumericFormatV4(src);
+        if (!ALLOW_AMBIGUOUS_IPADDRESS_LITERALS_SP_VALUE
+                && parsedBytes == null && isBsdParsableV4(src)) {
+            throw new IllegalArgumentException("Invalid IP address literal: " + src);
+        }
+        return parsedBytes;
+    }
+
+    /*
+     * Convert IPv6 presentation level address to network order binary form.
+     * credit:
+     *  Converted from C code from Solaris 8 (inet_pton)
+     *
+     * Any component of the string following a per-cent % is ignored.
+     *
+     * @param src a String representing an IPv6 address in textual format
+     * @return a byte array representing the IPv6 numeric address
+     */
+    public static byte[] textToNumericFormatV6(String src)
+    {
+        // Shortest valid string is "::", hence at least 2 chars
+        if (src.length() < 2) {
+            return null;
+        }
+
+        int colonp;
+        char ch;
+        boolean saw_xdigit;
+        int val;
+        char[] srcb = src.toCharArray();
+        byte[] dst = new byte[INADDR16SZ];
+
+        int srcb_length = srcb.length;
+        int pc = src.indexOf ("%");
+        if (pc == srcb_length -1) {
+            return null;
+        }
+
+        if (pc != -1) {
+            srcb_length = pc;
+        }
+
+        colonp = -1;
+        int i = 0, j = 0;
+        /* Leading :: requires some special handling. */
+        if (srcb[i] == ':')
+            if (srcb[++i] != ':')
+                return null;
+        int curtok = i;
+        saw_xdigit = false;
+        val = 0;
+        while (i < srcb_length) {
+            ch = srcb[i++];
+            int chval = digit(ch, 16);
+            if (chval != -1) {
+                val <<= 4;
+                val |= chval;
+                if (val > 0xffff)
+                    return null;
+                saw_xdigit = true;
+                continue;
+            }
+            if (ch == ':') {
+                curtok = i;
+                if (!saw_xdigit) {
+                    if (colonp != -1)
+                        return null;
+                    colonp = j;
+                    continue;
+                } else if (i == srcb_length) {
+                    return null;
+                }
+                if (j + INT16SZ > INADDR16SZ)
+                    return null;
+                dst[j++] = (byte) ((val >> 8) & 0xff);
+                dst[j++] = (byte) (val & 0xff);
+                saw_xdigit = false;
+                val = 0;
+                continue;
+            }
+            if (ch == '.' && ((j + INADDR4SZ) <= INADDR16SZ)) {
+                String ia4 = src.substring(curtok, srcb_length);
+                /* check this IPv4 address has 3 dots, ie. A.B.C.D */
+                int dot_count = 0, index=0;
+                while ((index = ia4.indexOf ('.', index)) != -1) {
+                    dot_count ++;
+                    index ++;
+                }
+                if (dot_count != 3) {
+                    return null;
+                }
+                byte[] v4addr = textToNumericFormatV4(ia4);
+                if (v4addr == null) {
+                    return null;
+                }
+                for (int k = 0; k < INADDR4SZ; k++) {
+                    dst[j++] = v4addr[k];
+                }
+                saw_xdigit = false;
+                break;  /* '\0' was seen by inet_pton4(). */
+            }
+            return null;
+        }
+        if (saw_xdigit) {
+            if (j + INT16SZ > INADDR16SZ)
+                return null;
+            dst[j++] = (byte) ((val >> 8) & 0xff);
+            dst[j++] = (byte) (val & 0xff);
+        }
+
+        if (colonp != -1) {
+            int n = j - colonp;
+
+            if (j == INADDR16SZ)
+                return null;
+            for (i = 1; i <= n; i++) {
+                dst[INADDR16SZ - i] = dst[colonp + n - i];
+                dst[colonp + n - i] = 0;
+            }
+            j = INADDR16SZ;
+        }
+        if (j != INADDR16SZ)
+            return null;
+        byte[] newdst = convertFromIPv4MappedAddress(dst);
+        if (newdst != null) {
+            return newdst;
+        } else {
+            return dst;
+        }
+    }
+
+    /**
+     * @param src a String representing an IPv4 address in textual format
+     * @return a boolean indicating whether src is an IPv4 literal address
+     */
+    public static boolean isIPv4LiteralAddress(String src) {
+        return textToNumericFormatV4(src) != null;
+    }
+
+    /**
+     * @param src a String representing an IPv6 address in textual format
+     * @return a boolean indicating whether src is an IPv6 literal address
+     */
+    public static boolean isIPv6LiteralAddress(String src) {
+        return textToNumericFormatV6(src) != null;
+    }
+
+    /*
+     * Convert IPv4-Mapped address to IPv4 address. Both input and
+     * returned value are in network order binary form.
+     *
+     * @param src a String representing an IPv4-Mapped address in textual format
+     * @return a byte array representing the IPv4 numeric address
+     */
+    public static byte[] convertFromIPv4MappedAddress(byte[] addr) {
+        if (isIPv4MappedAddress(addr)) {
+            byte[] newAddr = new byte[INADDR4SZ];
+            System.arraycopy(addr, 12, newAddr, 0, INADDR4SZ);
+            return newAddr;
+        }
+        return null;
+    }
+
+    /**
+     * Utility routine to check if the InetAddress is an
+     * IPv4 mapped IPv6 address.
+     *
+     * @return a <code>boolean</code> indicating if the InetAddress is
+     * an IPv4 mapped IPv6 address; or false if address is IPv4 address.
+     */
+    private static boolean isIPv4MappedAddress(byte[] addr) {
+        if (addr.length < INADDR16SZ) {
+            return false;
+        }
+        if ((addr[0] == 0x00) && (addr[1] == 0x00) &&
+            (addr[2] == 0x00) && (addr[3] == 0x00) &&
+            (addr[4] == 0x00) && (addr[5] == 0x00) &&
+            (addr[6] == 0x00) && (addr[7] == 0x00) &&
+            (addr[8] == 0x00) && (addr[9] == 0x00) &&
+            (addr[10] == (byte)0xff) &&
+            (addr[11] == (byte)0xff))  {
+            return true;
+        }
+        return false;
+    }
+
+    // See java.net.URI for more details on how to generate these
+    // masks.
+    //
+    // square brackets
+    private static final long L_IPV6_DELIMS = 0x0L; // "[]"
+    private static final long H_IPV6_DELIMS = 0x28000000L; // "[]"
+    // RFC 3986 gen-delims
+    private static final long L_GEN_DELIMS = 0x8400800800000000L; // ":/?#[]@"
+    private static final long H_GEN_DELIMS = 0x28000001L; // ":/?#[]@"
+    // These gen-delims can appear in authority
+    private static final long L_AUTH_DELIMS = 0x400000000000000L; // "@[]:"
+    private static final long H_AUTH_DELIMS = 0x28000001L; // "@[]:"
+    // colon is allowed in userinfo
+    private static final long L_COLON = 0x400000000000000L; // ":"
+    private static final long H_COLON = 0x0L; // ":"
+    // slash should be encoded in authority
+    private static final long L_SLASH = 0x800000000000L; // "/"
+    private static final long H_SLASH = 0x0L; // "/"
+    // backslash should always be encoded
+    private static final long L_BACKSLASH = 0x0L; // "\"
+    private static final long H_BACKSLASH = 0x10000000L; // "\"
+    // ASCII chars 0-31 + 127 - various controls + CRLF + TAB
+    private static final long L_NON_PRINTABLE = 0xffffffffL;
+    private static final long H_NON_PRINTABLE = 0x8000000000000000L;
+    // All of the above
+    private static final long L_EXCLUDE = 0x84008008ffffffffL;
+    private static final long H_EXCLUDE = 0x8000000038000001L;
+
+    private static final char[] OTHERS = {
+            8263,8264,8265,8448,8449,8453,8454,10868,
+            65109,65110,65119,65131,65283,65295,65306,65311,65312
+    };
+
+    // Tell whether the given character is found by the given mask pair
+    public static boolean match(char c, long lowMask, long highMask) {
+        if (c < 64)
+            return ((1L << c) & lowMask) != 0;
+        if (c < 128)
+            return ((1L << (c - 64)) & highMask) != 0;
+        return false; // other non ASCII characters are not filtered
+    }
+
+    // returns -1 if the string doesn't contain any characters
+    // from the mask, the index of the first such character found
+    // otherwise.
+    public static int scan(String s, long lowMask, long highMask) {
+        int i = -1, len;
+        if (s == null || (len = s.length()) == 0) return -1;
+        boolean match = false;
+        while (++i < len && !(match = match(s.charAt(i), lowMask, highMask)));
+        if (match) return i;
+        return -1;
+    }
+
+    public static int scan(String s, long lowMask, long highMask, char[] others) {
+        int i = -1, len;
+        if (s == null || (len = s.length()) == 0) return -1;
+        boolean match = false;
+        char c, c0 = others[0];
+        while (++i < len && !(match = match((c=s.charAt(i)), lowMask, highMask))) {
+            if (c >= c0 && (Arrays.binarySearch(others, c) > -1)) {
+                match = true; break;
+            }
+        }
+        if (match) return i;
+
+        return -1;
+    }
+
+    private static String describeChar(char c) {
+        if (c < 32 || c == 127) {
+            if (c == '\n') return "LF";
+            if (c == '\r') return "CR";
+            return "control char (code=" + (int)c + ")";
+        }
+        if (c == '\\') return "'\\'";
+        return "'" + c + "'";
+    }
+
+    private static String checkUserInfo(String str) {
+        // colon is permitted in user info
+        int index = scan(str, L_EXCLUDE & ~L_COLON,
+                H_EXCLUDE & ~H_COLON);
+        if (index >= 0) {
+            return "Illegal character found in user-info: "
+                    + describeChar(str.charAt(index));
+        }
+        return null;
+    }
+
+    private static String checkHost(String str) {
+        int index;
+        if (str.startsWith("[") && str.endsWith("]")) {
+            str = str.substring(1, str.length() - 1);
+            if (isIPv6LiteralAddress(str)) {
+                index = str.indexOf('%');
+                if (index >= 0) {
+                    index = scan(str = str.substring(index),
+                            L_NON_PRINTABLE | L_IPV6_DELIMS,
+                            H_NON_PRINTABLE | H_IPV6_DELIMS);
+                    if (index >= 0) {
+                        return "Illegal character found in IPv6 scoped address: "
+                                + describeChar(str.charAt(index));
+                    }
+                }
+                return null;
+            }
+            return "Unrecognized IPv6 address format";
+        } else {
+            index = scan(str, L_EXCLUDE, H_EXCLUDE);
+            if (index >= 0) {
+                return "Illegal character found in host: "
+                        + describeChar(str.charAt(index));
+            }
+        }
+        return null;
+    }
+
+    private static String checkAuth(String str) {
+        int index = scan(str,
+                L_EXCLUDE & ~L_AUTH_DELIMS,
+                H_EXCLUDE & ~H_AUTH_DELIMS);
+        if (index >= 0) {
+            return "Illegal character found in authority: "
+                    + describeChar(str.charAt(index));
+        }
+        return null;
+    }
+
+    // check authority of hierarchical URL. Appropriate for
+    // HTTP-like protocol handlers
+    public static String checkAuthority(URL url) {
+        String s, u, h;
+        if (url == null) return null;
+        if ((s = checkUserInfo(u = url.getUserInfo())) != null) {
+            return s;
+        }
+        if ((s = checkHost(h = url.getHost())) != null) {
+            return s;
+        }
+        if (h == null && u == null) {
+            return checkAuth(url.getAuthority());
+        }
+        return null;
+    }
+
+    // minimal syntax checks - deeper check may be performed
+    // by the appropriate protocol handler
+    public static String checkExternalForm(URL url) {
+        String s;
+        if (url == null) return null;
+        int index = scan(s = url.getUserInfo(),
+                L_NON_PRINTABLE | L_SLASH,
+                H_NON_PRINTABLE | H_SLASH);
+        if (index >= 0) {
+            return "Illegal character found in authority: "
+                    + describeChar(s.charAt(index));
+        }
+        if ((s = checkHostString(url.getHost())) != null) {
+            return s;
+        }
+        return null;
+    }
+
+    public static String checkHostString(String host) {
+        if (host == null) return null;
+        int index = scan(host,
+                L_NON_PRINTABLE | L_SLASH,
+                H_NON_PRINTABLE | H_SLASH,
+                OTHERS);
+        if (index >= 0) {
+            return "Illegal character found in host: "
+                    + describeChar(host.charAt(index));
+        }
+        return null;
+    }
+
+    /**
+     * Returns the numeric value of the character {@code ch} in the
+     * specified radix.
+     *
+     * @param ch    the character to be converted.
+     * @param radix the radix.
+     * @return the numeric value represented by the character in the
+     * specified radix.
+     */
+    public static int digit(char ch, int radix) {
+        if (ALLOW_AMBIGUOUS_IPADDRESS_LITERALS_SP_VALUE) {
+            return Character.digit(ch, radix);
+        } else {
+            return parseAsciiDigit(ch, radix);
+        }
+    }
+
+    /**
+     * Try to parse String as IPv4 address literal by following
+     * BSD-style formatting rules.
+     *
+     * @param input input string
+     * @return {@code true} if input string is parsable as IPv4 address literal,
+     * {@code false} otherwise.
+     */
+    public static boolean isBsdParsableV4(String input) {
+        char firstSymbol = input.charAt(0);
+        // Check if first digit is not a decimal digit
+        if (parseAsciiDigit(firstSymbol, DECIMAL) == -1) {
+            return false;
+        }
+
+        // Last character is dot OR is not a supported digit: [0-9,A-F,a-f]
+        char lastSymbol = input.charAt(input.length() - 1);
+        if (lastSymbol == '.' || parseAsciiHexDigit(lastSymbol) == -1) {
+            return false;
+        }
+
+        // Parse IP address fields
+        CharBuffer charBuffer = CharBuffer.wrap(input);
+        int fieldNumber = 0;
+        while (charBuffer.hasRemaining()) {
+            long fieldValue = -1L;
+            // Try to parse fields in all supported radixes
+            for (int radix : SUPPORTED_RADIXES) {
+                fieldValue = parseV4FieldBsd(radix, charBuffer, fieldNumber);
+                if (fieldValue >= 0) {
+                    fieldNumber++;
+                    break;
+                } else if (fieldValue == TERMINAL_PARSE_ERROR) {
+                    return false;
+                }
+            }
+            // If field can't be parsed as one of supported radixes stop
+            // parsing
+            if (fieldValue < 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Method tries to parse IP address field that starts from {@linkplain CharBuffer#position()
+     * current position} of the provided character buffer.
+     * <p>
+     * This method supports three {@code "radix"} values to decode field values in
+     * {@code "HEXADECIMAL (radix=16)"}, {@code "DECIMAL (radix=10)"} and
+     * {@code "OCTAL (radix=8)"} radixes.
+     * <p>
+     * If {@code -1} value is returned the char buffer position is reset to the value
+     * it was before it was called.
+     * <p>
+     * Method returns {@code -2} if formatting illegal for all supported {@code radix}
+     * values is observed, and there is no point in checking other radix values.
+     * That includes the following cases:<ul>
+     * <li>Two subsequent dots are observer
+     * <li>Number of dots more than 3
+     * <li>Field value exceeds max allowed
+     * <li>Character is not a valid digit for the requested {@code radix} value, given
+     * that a field has the radix specific prefix
+     * </ul>
+     *
+     * @param radix       digits encoding radix to use for parsing. Valid values: 8, 10, 16.
+     * @param buffer      {@code CharBuffer} with position set to the field's fist character
+     * @param fieldNumber parsed field number
+     * @return {@code CANT_PARSE_IN_RADIX} if field can not be parsed in requested {@code radix}.
+     * {@code TERMINAL_PARSE_ERROR} if field can't be parsed and the whole parse process should be terminated.
+     * Parsed field value otherwise.
+     */
+    private static long parseV4FieldBsd(int radix, CharBuffer buffer, int fieldNumber) {
+        int initialPos = buffer.position();
+        long val = 0;
+        int digitsCount = 0;
+        if (!checkPrefix(buffer, radix)) {
+            val = CANT_PARSE_IN_RADIX;
+        }
+        boolean dotSeen = false;
+        while (buffer.hasRemaining() && val != CANT_PARSE_IN_RADIX && !dotSeen) {
+            char c = buffer.get();
+            if (c == '.') {
+                dotSeen = true;
+                // Fail if 4 dots in IP address string.
+                // fieldNumber counter starts from 0, therefore 3
+                if (fieldNumber == 3) {
+                    // Terminal state, can stop parsing: too many fields
+                    return TERMINAL_PARSE_ERROR;
+                }
+                // Check for literals with two dots, like '1.2..3', '1.2.3..'
+                if (digitsCount == 0) {
+                    // Terminal state, can stop parsing: dot with no digits
+                    return TERMINAL_PARSE_ERROR;
+                }
+                if (val > 255) {
+                    // Terminal state, can stop parsing: too big value for an octet
+                    return TERMINAL_PARSE_ERROR;
+                }
+            } else {
+                int dv = parseAsciiDigit(c, radix);
+                if (dv >= 0) {
+                    digitsCount++;
+                    val *= radix;
+                    val += dv;
+                } else {
+                    // Spotted digit can't be parsed in the requested 'radix'.
+                    // The order in which radixes are checked - hex, octal, decimal:
+                    //    - if symbol is not a valid digit in hex radix - terminal
+                    //    - if symbol is not a valid digit in octal radix, and given
+                    //      that octal prefix was observed before - terminal
+                    //    - if symbol is not a valid digit in decimal radix - terminal
+                    return TERMINAL_PARSE_ERROR;
+                }
+            }
+        }
+        if (val == CANT_PARSE_IN_RADIX) {
+            buffer.position(initialPos);
+        } else if (!dotSeen) {
+            // It is the last field - check its value
+            // This check will ensure that address strings with less
+            // than 4 fields, i.e. A, A.B and A.B.C address types
+            // contain value less then the allowed maximum for the last field.
+            long maxValue = (1L << ((4 - fieldNumber) * 8)) - 1;
+            if (val > maxValue) {
+                //  Terminal state, can stop parsing: last field value exceeds its
+                //  allowed value
+                return TERMINAL_PARSE_ERROR;
+            }
+        }
+        return val;
+    }
+
+    // This method moves the position of the supplied CharBuffer by analysing the digit prefix
+    // symbols if any.
+    // The caller should reset the position when method returns false.
+    private static boolean checkPrefix(CharBuffer buffer, int radix) {
+        switch (radix) {
+            case OCTAL:
+                return isOctalFieldStart(buffer);
+            case DECIMAL:
+                return isDecimalFieldStart(buffer);
+            case HEXADECIMAL:
+                return isHexFieldStart(buffer);
+            default:
+                throw new AssertionError("Not supported radix");
+        }
+    }
+
+    // This method always moves the position of the supplied CharBuffer
+    // removing the octal prefix symbols '0'.
+    // The caller should reset the position when method returns false.
+    private static boolean isOctalFieldStart(CharBuffer cb) {
+        // .0<EOS> is not treated as octal field
+        if (cb.remaining() < 2) {
+            return false;
+        }
+
+        // Fetch two first characters
+        int position = cb.position();
+        char first = cb.get();
+        char second = cb.get();
+
+        // Return false if the first char is not octal prefix '0' or second is a
+        // field separator - parseV4FieldBsd will reset position to start of the field.
+        // '.0.' fields will be successfully parsed in decimal radix.
+        boolean isOctalPrefix = first == '0' && second != '.';
+
+        // If the prefix looks like octal - consume '0', otherwise 'false' is returned
+        // and caller will reset the buffer position.
+        if (isOctalPrefix) {
+            cb.position(position + 1);
+        }
+        return isOctalPrefix;
+    }
+
+    // This method doesn't move the position of the supplied CharBuffer
+    private static boolean isDecimalFieldStart(CharBuffer cb) {
+        return cb.hasRemaining();
+    }
+
+    // This method always moves the position of the supplied CharBuffer
+    // removing the hexadecimal prefix symbols '0x'.
+    // The caller should reset the position when method returns false.
+    private static boolean isHexFieldStart(CharBuffer cb) {
+        if (cb.remaining() < 2) {
+            return false;
+        }
+        char first = cb.get();
+        char second = cb.get();
+        return first == '0' && (second == 'x' || second == 'X');
+    }
+
+    // Parse ASCII digit in given radix
+    public static int parseAsciiDigit(char c, int radix) {
+        assert radix == OCTAL || radix == DECIMAL || radix == HEXADECIMAL;
+        if (radix == HEXADECIMAL) {
+            return parseAsciiHexDigit(c);
+        }
+        int val = c - '0';
+        return (val < 0 || val >= radix) ? -1 : val;
+    }
+
+    // Parse ASCII digit in hexadecimal radix
+    private static int parseAsciiHexDigit(char digit) {
+        char c = Character.toLowerCase(digit);
+        if (c >= 'a' && c <= 'f') {
+            return c - 'a' + 10;
+        }
+        return parseAsciiDigit(c, DECIMAL);
+    }
+
+    // Supported radixes
+    private static final int HEXADECIMAL = 16;
+    private static final int DECIMAL = 10;
+    private static final int OCTAL = 8;
+    // Order in which field formats are exercised to parse one IP address textual field
+    private static final int[] SUPPORTED_RADIXES = new int[]{HEXADECIMAL, OCTAL, DECIMAL};
+
+    // BSD parser's return values
+    private final static long CANT_PARSE_IN_RADIX = -1L;
+    private final static long TERMINAL_PARSE_ERROR = -2L;
+
+    private static final String ALLOW_AMBIGUOUS_IPADDRESS_LITERALS_SP = "jdk.net.allowAmbiguousIPAddressLiterals";
+    private static final boolean ALLOW_AMBIGUOUS_IPADDRESS_LITERALS_SP_VALUE = Boolean.valueOf(
+            GetPropertyAction.privilegedGetProperty(ALLOW_AMBIGUOUS_IPADDRESS_LITERALS_SP, "false"));
+}

jdkSrc/jdk8/sun/net/util/ProxyUtil.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2025, 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 sun.net.util;
+
+import sun.net.ApplicationProxy;
+
+import java.net.Proxy;
+
+public final class ProxyUtil {
+
+    private ProxyUtil() {}
+
+    /**
+     * Creates a new {@link Proxy} instance for the given proxy iff it is
+     * neither null, {@link Proxy#NO_PROXY Proxy.NO_PROXY}, an
+     * {@link ApplicationProxy} instance, nor already a {@code Proxy} instance.
+     */
+    public static Proxy copyProxy(Proxy proxy) {
+        return proxy == null
+                || proxy.getClass() == Proxy.class
+                || proxy instanceof ApplicationProxy
+                ? proxy
+                : new Proxy(proxy.type(), proxy.address());
+    }
+
+}

jdkSrc/jdk8/sun/net/util/URLUtil.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2009, 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 sun.net.util;
+
+import java.io.IOException;
+import java.net.URL;
+import java.net.URLPermission;
+import java.security.Permission;
+
+/**
+ * URL Utility class.
+ */
+public class URLUtil {
+    /**
+     * Returns a string form of the url suitable for use as a key in HashMap/Sets.
+     *
+     * The string form should be behave in the same manner as the URL when
+     * compared for equality in a HashMap/Set, except that no nameservice
+     * lookup is done on the hostname (only string comparison), and the fragment
+     * is not considered.
+     *
+     * @see java.net.URLStreamHandler.sameFile(java.net.URL)
+     */
+    public static String urlNoFragString(URL url) {
+        StringBuilder strForm = new StringBuilder();
+
+        String protocol = url.getProtocol();
+        if (protocol != null) {
+            /* protocol is compared case-insensitive, so convert to lowercase */
+            protocol = protocol.toLowerCase();
+            strForm.append(protocol);
+            strForm.append("://");
+        }
+
+        String host = url.getHost();
+        if (host != null) {
+            /* host is compared case-insensitive, so convert to lowercase */
+            host = host.toLowerCase();
+            strForm.append(host);
+
+            int port = url.getPort();
+            if (port == -1) {
+                /* if no port is specificed then use the protocols
+                 * default, if there is one */
+                port = url.getDefaultPort();
+            }
+            if (port != -1) {
+                strForm.append(":").append(port);
+            }
+        }
+
+        String file = url.getFile();
+        if (file != null) {
+            strForm.append(file);
+        }
+
+        return strForm.toString();
+    }
+
+    public static Permission getConnectPermission(URL url) throws IOException {
+        String urlStringLowerCase = url.toString().toLowerCase();
+        if (urlStringLowerCase.startsWith("http:") || urlStringLowerCase.startsWith("https:")) {
+            return getURLConnectPermission(url);
+        } else if (urlStringLowerCase.startsWith("jar:http:") || urlStringLowerCase.startsWith("jar:https:")) {
+            String urlString = url.toString();
+            int bangPos = urlString.indexOf("!/");
+            urlString = urlString.substring(4, bangPos > -1 ? bangPos : urlString.length());
+            URL u = new URL(urlString);
+            return getURLConnectPermission(u);
+            // If protocol is HTTP or HTTPS than use URLPermission object
+        } else {
+            return url.openConnection().getPermission();
+        }
+    }
+
+    private static Permission getURLConnectPermission(URL url) {
+        String urlString = url.getProtocol() + "://" + url.getAuthority() + url.getPath();
+        return new URLPermission(urlString);
+    }
+}
+