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backend/node_modules/hono/dist/utils/ipaddr.js

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+// src/utils/ipaddr.ts
+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(":")
+      // => ['7f00', '0001']
+    );
+  }
+  for (let i = 0; i < sections.length; i++) {
+    const node = sections[i];
+    if (node !== "") {
+      sections[i] = node.padStart(4, "0");
+    } else {
+      sections[i + 1] === "" && sections.splice(i + 1, 1);
+      sections[i] = new Array(8 - sections.length + 1).fill("0000").join(":");
+    }
+  }
+  return sections.join(":");
+};
+var IPV4_REGEX = /^[0-9]{0,3}\.[0-9]{0,3}\.[0-9]{0,3}\.[0-9]{0,3}$/;
+var distinctRemoteAddr = (remoteAddr) => {
+  if (IPV4_REGEX.test(remoteAddr)) {
+    return "IPv4";
+  }
+  if (remoteAddr.includes(":")) {
+    return "IPv6";
+  }
+};
+var convertIPv4ToBinary = (ipv4) => {
+  const parts = ipv4.split(".");
+  let result = 0n;
+  for (let i = 0; i < 4; i++) {
+    result <<= 8n;
+    result += BigInt(parts[i]);
+  }
+  return result;
+};
+var convertIPv6ToBinary = (ipv6) => {
+  const sections = expandIPv6(ipv6).split(":");
+  let result = 0n;
+  for (let i = 0; i < 8; i++) {
+    result <<= 16n;
+    result += BigInt(parseInt(sections[i], 16));
+  }
+  return result;
+};
+var convertIPv4BinaryToString = (ipV4) => {
+  const sections = [];
+  for (let i = 0; i < 4; i++) {
+    sections.push(ipV4 >> BigInt(8 * (3 - i)) & 0xffn);
+  }
+  return sections.join(".");
+};
+var convertIPv6BinaryToString = (ipV6) => {
+  if (ipV6 >> 32n === 0xffffn) {
+    return `::ffff:${convertIPv4BinaryToString(ipV6 & 0xffffffffn)}`;
+  }
+  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) {
+    sections.splice(maxZeroStart, maxZeroEnd - maxZeroStart, ":");
+  }
+  return sections.join(":").replace(/:{2,}/g, "::");
+};
+export {
+  convertIPv4BinaryToString,
+  convertIPv4ToBinary,
+  convertIPv6BinaryToString,
+  convertIPv6ToBinary,
+  distinctRemoteAddr,
+  expandIPv6
+};