More Networking Implementation

api/helper.py

@@ -163,3 +163,21 @@ def get_etcd_counter(etcd_client, key):
     if kv:
         return int(kv.value)
     return None
+
+def mac2ipv6(mac, prefix):
+    # only accept MACs separated by a colon
+    parts = mac.split(":")
+
+    # modify parts to match IPv6 value
+    parts.insert(3, "ff")
+    parts.insert(4, "fe")
+    parts[0] = "%x" % (int(parts[0], 16) ^ 2)
+
+    # format output
+    ipv6Parts = [str(0)]*4
+    for i in range(0, len(parts), 2):
+        ipv6Parts.append("".join(parts[i:i+2]))
+    
+    lower_part = ipaddress.IPv6Address(":".join(ipv6Parts))
+    prefix = ipaddress.IPv6Address(prefix)
+    return str(prefix + int(lower_part))