|
|
| var expandIPv6 = (ipV6) => {
|
| const sections = ipV6.split(":");
|
| if (IPV4_REGEX.test(sections.at(-1))) {
|
| sections.splice(
|
| -1,
|
| 1,
|
| ...convertIPv6BinaryToString(convertIPv4ToBinary(sections.at(-1))).substring(2).split(":")
|
|
|
| );
|
| }
|
| for (let i = 0; i < sections.length; i++) {
|
| const node = sections[i];
|
| if (node !== "") {
|
| sections[i] = node.padStart(4, "0");
|
| } else {
|
| while (sections[i + 1] === "") {
|
| sections.splice(i + 1, 1);
|
| }
|
| sections[i] = new Array(8 - sections.length + 1).fill("0000").join(":");
|
| }
|
| }
|
| return sections.join(":");
|
| };
|
| var IPV4_OCTET_PART = "(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])";
|
| var IPV4_REGEX = new RegExp(`^(?:${IPV4_OCTET_PART}\\.){3}${IPV4_OCTET_PART}$`);
|
| var INVALID_IP_ADDRESS_ERROR_CODE = "ERR_INVALID_IP_ADDRESS";
|
| var CHAR_CODE_0 = 48;
|
| var CHAR_CODE_9 = 57;
|
| var CHAR_CODE_A = 65;
|
| var CHAR_CODE_F = 70;
|
| var CHAR_CODE_a = 97;
|
| var CHAR_CODE_f = 102;
|
| var CHAR_CODE_DOT = 46;
|
| var CHAR_CODE_COLON = 58;
|
| var CHAR_CODE_PERCENT = 37;
|
| var distinctRemoteAddr = (remoteAddr) => {
|
| if (IPV4_REGEX.test(remoteAddr)) {
|
| return "IPv4";
|
| }
|
| if (remoteAddr.includes(":")) {
|
| return "IPv6";
|
| }
|
| };
|
| var createInvalidIPAddressError = (message) => {
|
| const error = new TypeError(message);
|
| error.code = INVALID_IP_ADDRESS_ERROR_CODE;
|
| return error;
|
| };
|
| var throwInvalidIPv4Address = (ipv4) => {
|
| throw createInvalidIPAddressError(`Invalid IPv4 address: ${ipv4}`);
|
| };
|
| var throwInvalidIPv6Address = (ipv6) => {
|
| throw createInvalidIPAddressError(`Invalid IPv6 address: ${ipv6}`);
|
| };
|
| var parseIPv4ToBinary = (ipv4, start, end, onInvalid) => {
|
| let result = 0n;
|
| let octets = 0;
|
| let octet = 0;
|
| let digits = 0;
|
| let firstDigit = 0;
|
| for (let i = start; i <= end; i++) {
|
| const code = i < end ? ipv4.charCodeAt(i) : CHAR_CODE_DOT;
|
| if (code >= CHAR_CODE_0 && code <= CHAR_CODE_9) {
|
| if (digits === 0) {
|
| firstDigit = code;
|
| } else if (firstDigit === CHAR_CODE_0) {
|
| onInvalid();
|
| }
|
| octet = octet * 10 + code - CHAR_CODE_0;
|
| if (octet > 255) {
|
| onInvalid();
|
| }
|
| digits++;
|
| continue;
|
| }
|
| if (code !== CHAR_CODE_DOT || digits === 0 || octets === 4) {
|
| onInvalid();
|
| }
|
| result = (result << 8n) + BigInt(octet);
|
| octets++;
|
| octet = 0;
|
| digits = 0;
|
| }
|
| if (octets !== 4) {
|
| onInvalid();
|
| }
|
| return result;
|
| };
|
| var parseIPv6HexCode = (code) => {
|
| if (code >= CHAR_CODE_0 && code <= CHAR_CODE_9) {
|
| return code - CHAR_CODE_0;
|
| }
|
| if (code >= CHAR_CODE_A && code <= CHAR_CODE_F) {
|
| return code - CHAR_CODE_A + 10;
|
| }
|
| if (code >= CHAR_CODE_a && code <= CHAR_CODE_f) {
|
| return code - CHAR_CODE_a + 10;
|
| }
|
| return -1;
|
| };
|
| var isIPv6LinkLocal = (ipv6binary) => ipv6binary >> 118n === 0x3fan;
|
| var convertIPv4ToBinary = (ipv4) => {
|
| return parseIPv4ToBinary(ipv4, 0, ipv4.length, () => throwInvalidIPv4Address(ipv4));
|
| };
|
| var convertIPv6ToBinary = (ipv6) => {
|
| const length = ipv6.length;
|
| const sections = [];
|
| let hasZoneId = false;
|
| let compressAt = -1;
|
| let index = 0;
|
| if (length === 0) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| while (index < length) {
|
| if (sections.length > 8) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| let code = ipv6.charCodeAt(index);
|
| if (code === CHAR_CODE_PERCENT) {
|
| if (index + 1 === length) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| hasZoneId = true;
|
| break;
|
| }
|
| if (code === CHAR_CODE_COLON) {
|
| if (index + 1 < length && ipv6.charCodeAt(index + 1) === CHAR_CODE_COLON) {
|
| if (compressAt !== -1) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| compressAt = sections.length;
|
| index += 2;
|
| continue;
|
| }
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| let value = 0;
|
| let digits = 0;
|
| const sectionStart = index;
|
| while (index < length) {
|
| code = ipv6.charCodeAt(index);
|
| const hex = parseIPv6HexCode(code);
|
| if (hex === -1) {
|
| break;
|
| }
|
| if (digits === 4) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| value = value << 4 | hex;
|
| digits++;
|
| index++;
|
| }
|
| if (index < length && ipv6.charCodeAt(index) === CHAR_CODE_DOT) {
|
| let ipv4End = length;
|
| for (let i = index; i < length; i++) {
|
| if (ipv6.charCodeAt(i) === CHAR_CODE_PERCENT) {
|
| if (i + 1 === length) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| hasZoneId = true;
|
| ipv4End = i;
|
| break;
|
| }
|
| }
|
| const ipv4 = parseIPv4ToBinary(
|
| ipv6,
|
| sectionStart,
|
| ipv4End,
|
| () => throwInvalidIPv6Address(ipv6)
|
| );
|
| sections.push(Number(ipv4 >> 16n & 0xffffn), Number(ipv4 & 0xffffn));
|
| index = length;
|
| break;
|
| }
|
| if (digits === 0) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| sections.push(value);
|
| if (index === length) {
|
| break;
|
| }
|
| code = ipv6.charCodeAt(index);
|
| if (code === CHAR_CODE_PERCENT) {
|
| if (index + 1 === length) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| hasZoneId = true;
|
| break;
|
| }
|
| if (code !== CHAR_CODE_COLON) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| if (index + 1 < length && ipv6.charCodeAt(index + 1) === CHAR_CODE_COLON) {
|
| if (compressAt !== -1) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| compressAt = sections.length;
|
| index += 2;
|
| continue;
|
| }
|
| index++;
|
| if (index === length) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| }
|
| if (compressAt === -1 ? sections.length !== 8 : sections.length >= 8) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| let result = 0n;
|
| const zeros = compressAt === -1 ? 0 : 8 - sections.length;
|
| const firstSectionEnd = compressAt === -1 ? sections.length : compressAt;
|
| for (let i = 0; i < firstSectionEnd; i++) {
|
| result <<= 16n;
|
| result += BigInt(sections[i]);
|
| }
|
| for (let i = 0; i < zeros; i++) {
|
| result <<= 16n;
|
| }
|
| for (let i = firstSectionEnd; i < sections.length; i++) {
|
| result <<= 16n;
|
| result += BigInt(sections[i]);
|
| }
|
| if (hasZoneId && !isIPv6LinkLocal(result)) {
|
| throwInvalidIPv6Address(ipv6);
|
| }
|
| return result;
|
| };
|
| var convertIPv4BinaryToString = (ipV4) => {
|
| const sections = [];
|
| for (let i = 0; i < 4; i++) {
|
| sections.push(ipV4 >> BigInt(8 * (3 - i)) & 0xffn);
|
| }
|
| return sections.join(".");
|
| };
|
| var isIPv4MappedIPv6 = (ipv6binary) => ipv6binary >> 32n === 0xffffn;
|
| var convertIPv4MappedIPv6ToIPv4 = (ipv6binary) => ipv6binary & 0xffffffffn;
|
| var convertIPv6BinaryToString = (ipV6) => {
|
| if (ipV6 === 0n) {
|
| return "::";
|
| }
|
| if (isIPv4MappedIPv6(ipV6)) {
|
| return `::ffff:${convertIPv4BinaryToString(convertIPv4MappedIPv6ToIPv4(ipV6))}`;
|
| }
|
| const sections = [];
|
| for (let i = 0; i < 8; i++) {
|
| sections.push((ipV6 >> BigInt(16 * (7 - i)) & 0xffffn).toString(16));
|
| }
|
| let currentZeroStart = -1;
|
| let maxZeroStart = -1;
|
| let maxZeroEnd = -1;
|
| for (let i = 0; i < 8; i++) {
|
| if (sections[i] === "0") {
|
| if (currentZeroStart === -1) {
|
| currentZeroStart = i;
|
| }
|
| } else {
|
| if (currentZeroStart > -1) {
|
| if (i - currentZeroStart > maxZeroEnd - maxZeroStart) {
|
| maxZeroStart = currentZeroStart;
|
| maxZeroEnd = i;
|
| }
|
| currentZeroStart = -1;
|
| }
|
| }
|
| }
|
| if (currentZeroStart > -1) {
|
| if (8 - currentZeroStart > maxZeroEnd - maxZeroStart) {
|
| maxZeroStart = currentZeroStart;
|
| maxZeroEnd = 8;
|
| }
|
| }
|
| if (maxZeroStart !== -1 && maxZeroEnd - maxZeroStart > 1) {
|
| sections.splice(maxZeroStart, maxZeroEnd - maxZeroStart, ":");
|
| }
|
| return sections.join(":").replace(/:{2,}/g, "::");
|
| };
|
| export {
|
| INVALID_IP_ADDRESS_ERROR_CODE,
|
| convertIPv4BinaryToString,
|
| convertIPv4MappedIPv6ToIPv4,
|
| convertIPv4ToBinary,
|
| convertIPv6BinaryToString,
|
| convertIPv6ToBinary,
|
| distinctRemoteAddr,
|
| expandIPv6,
|
| isIPv4MappedIPv6
|
| };
|
|
|
