From d507258ef2b2eeddbccd9660305136291c65d4bf Mon Sep 17 00:00:00 2001
From: Matthias Hannig <matthias@hannig.cc>
Date: Sun, 9 Sep 2018 18:35:27 +0200
Subject: [PATCH] added ip parser helper

---
 client/components/utils/ip.jsx | 35 ++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 client/components/utils/ip.jsx

diff --git a/client/components/utils/ip.jsx b/client/components/utils/ip.jsx
new file mode 100644
index 0000000..80bb113
--- /dev/null
+++ b/client/components/utils/ip.jsx
@@ -0,0 +1,35 @@
+
+import bigInt from 'big-integer'
+
+
+export function IPv6ToNumeric(addr) {
+  const parts = addr.split(":"); // let's se what we can do about the :: expansion
+  let expanded = [];
+
+  for (let p of parts) {
+    let binary = parseInt(p, 16).toString(2); // Convert to binary
+    while (binary.length < 16) {
+      // Leftpad
+      binary = "0" + binary;
+    }
+    expanded.push(binary);
+  }
+
+  return bigInt(expanded.join(""), 2);
+}
+
+export function IPv4ToNumeric(addr) {
+  const octets = addr.split('.');
+  return parseInt(octets[0], 10) * 16777216 + // 256^3
+         parseInt(octets[1], 10) * 65536 + // 256^2
+         parseInt(octets[2], 10) * 256 + // 256^1
+         parseInt(octets[3], 10); // 256^0
+}
+
+export function ipToNumeric(addr) {
+  if (addr.includes(":")) {
+    return IPv6ToNumeric(addr);
+  }
+  return IPv4ToNumeric(addr);
+}
+