chore: Adjust IPv6 range checking

Author: KagurazakaNyaa

src/base/utils/net.cpp

@@ -69,6 +69,28 @@ namespace
 
         return true;
     }
+
+    bool isValidIPRange(const QHostAddress &first, const QHostAddress &last)
+    {
+        if (first.isNull() || last.isNull())
+            return false;
+        if (first.protocol() != last.protocol())
+            return false;
+        if (first.protocol() == QAbstractSocket::IPv4Protocol)
+            return first.toIPv4Address() <= last.toIPv4Address();
+        if (first.protocol() == QAbstractSocket::IPv6Protocol)
+        {
+            const Q_IPV6ADDR firstIPv6 = first.toIPv6Address();
+            const Q_IPV6ADDR lastIPv6 = last.toIPv6Address();
+            QByteArray firstIPv6Bytes, lastIPv6Bytes;
+            for (const quint8 byte : firstIPv6.c)
+                firstIPv6Bytes.append(byte);
+            for (const quint8 byte : lastIPv6.c)
+                lastIPv6Bytes.append(byte);
+            return !std::ranges::lexicographical_compare(firstIPv6Bytes, lastIPv6Bytes, std::less<quint8>{});
+        }
+        return false;
+    }
 }
 
 namespace Utils
@@ -80,23 +102,6 @@ namespace Utils
             return !QHostAddress(ip).isNull();
         }
 
-        bool isValidIPRange(const QHostAddress &first, const QHostAddress &last)
-        {
-            if (first.isNull() || last.isNull())
-                return false;
-            if (first.protocol() != last.protocol())
-                return false;
-            if (first.protocol() == QAbstractSocket::IPv4Protocol)
-                return first.toIPv4Address() <= last.toIPv4Address();
-            if (first.protocol() == QAbstractSocket::IPv6Protocol)
-            {
-                const Q_IPV6ADDR firstIPv6 = first.toIPv6Address();
-                const Q_IPV6ADDR lastIPv6 = last.toIPv6Address();
-                return memcmp(firstIPv6.c, lastIPv6.c, sizeof(firstIPv6.c)) <= 0;
-            }
-            return false;
-        }
-
         std::optional<Subnet> parseSubnet(const QString &subnetStr)
         {
             const Subnet subnet = QHostAddress::parseSubnet(subnetStr);