1 files changed, 53 insertions, 0 deletions
diff --git a/data/extensions/https-everywhere@eff.org/background-scripts/ip_utils.js b/data/extensions/https-everywhere@eff.org/background-scripts/ip_utils.js
new file mode 100644
index 0000000..be7c1c8
--- /dev/null
+++ b/data/extensions/https-everywhere@eff.org/background-scripts/ip_utils.js
@@ -0,0 +1,53 @@
+'use strict';
+
+(function (exports) {
+
+const parseIp = ip => {
+  if (!/^[0-9.]+$/.test(ip)) {
+    return -1;
+  }
+
+  const octets = ip.split('.');
+
+  if (octets.length !== 4) {
+    return -1;
+  }
+
+  let ipN = 0;
+
+  for (const octet of octets) {
+    if (octet === '') {
+      return -1;
+    }
+
+    const octetN = parseInt(octet);
+
+    if (octetN < 0 || octetN > 255) {
+      return -1;
+    }
+
+    ipN = (ipN << 8) | octet;
+  }
+
+  return ipN >>> 0;
+};
+
+const isIpInRange = (ip, [rangeIp, mask]) => (ip & mask) >>> 0 === rangeIp;
+
+const localRanges = [
+  [/* 0.0.0.0         */ 0x00000000, /* 255.255.255.255 */ 0xffffffff],
+  [/* 127.0.0.0       */ 0x7f000000, /* 255.0.0.0       */ 0xff000000],
+  [/* 10.0.0.0        */ 0x0a000000, /* 255.0.0.0       */ 0xff000000],
+  [/* 172.16.0.0      */ 0xac100000, /* 255.240.0.0     */ 0xfff00000],
+  [/* 192.168.0.0     */ 0xc0a80000, /* 255.255.0.0     */ 0xffff0000],
+];
+
+const isLocalIp = ip => localRanges.some(range => isIpInRange(ip, range));
+
+Object.assign(exports, {
+  parseIp,
+  isIpInRange,
+  isLocalIp
+});
+
+})(typeof exports !== 'undefined' ? exports : require.scopes.ip_utils = {});