Adds support to @ipMatch operator

src/utils/ip_tree.h

@@ -0,0 +1,50 @@
+/*
+ * ModSecurity, http://www.modsecurity.org/
+ * Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
+ *
+ * You may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * If any of the files related to licensing are missing or if you have any
+ * other questions related to licensing please contact Trustwave Holdings, Inc.
+ * directly using the email address security@modsecurity.org.
+ *
+ */
+
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <functional>
+
+#include <GeoIPCity.h>
+
+#ifndef SRC_UTILS_IP_TREE_H_
+#define SRC_UTILS_IP_TREE_H_
+
+#include "modsecurity/assay.h"
+#include "utils/msc_tree.h"
+
+namespace ModSecurity {
+namespace Utils {
+
+
+class IpTree {
+ public:
+    IpTree()
+        : m_tree(NULL) { }
+    ~IpTree();
+
+    bool contains(const std::string &ip);
+    bool addFromBuffer(const std::string& buffer, std::string *error);
+    void postOrderTraversal(TreeNode *node);
+ private:
+    TreeRoot *m_tree;
+};
+
+
+}  // namespace Utils
+}  // namespace ModSecurity
+
+#endif  // SRC_UTILS_IP_TREE_H_