adding ipv6 support

calculations_4.js

@@ -0,0 +1,60 @@
+function inet_ntoa_4(addrint) {
+    return (
+        ((addrint >> 24) & 0xff) +
+        "." +
+        ((addrint >> 16) & 0xff) +
+        "." +
+        ((addrint >> 8) & 0xff) +
+        "." +
+        (addrint & 0xff)
+    );
+};
+
+function inet_aton_4(addrstr) {
+    var re = /^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/;
+    var res = re.exec(addrstr);
+
+    if (res === null) {
+        return null;
+    }
+
+    for (var i = 1; i <= 4; i++) {
+        if (res[i] < 0 || res[i] > 255) {
+            return null;
+        }
+    }
+
+    return (res[1] << 24) | (res[2] << 16) | (res[3] << 8) | res[4];
+}
+
+function network_address_4(ip, mask) {
+    var maskbits = 0;
+    for (var i = 31 - mask; i >= 0; i--) {
+        ip &= ~1 << i;
+    }
+    return ip;
+}
+
+function subnet_addresses_4(mask) {
+    return 1 << (32 - mask);
+}
+
+function subnet_first_address_useable_4(addrint) {
+    return addrint + 1;
+}
+
+function subnet_last_address_useable_4(addrint) {
+    return addrint - 1;
+}
+
+function subnet_last_address_4(mode, subnet, mask) {
+    return subnet + subnet_addresses(mode, mask) - 1;
+}
+
+function subnet_netmask_4(mask) {
+    return network_address(4, 0xffffffff, mask);
+}
+
+function num_hosts_4(useableFirst, useableLast) {
+    return 1 + useableLast - useableFirst;
+}