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setup/e2/RIC-E2-TERMINATION/BuildXml.h

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+/*
+ * Copyright 2020 AT&T Intellectual Property
+ * Copyright 2020 Nokia
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+// Created by adi ENZEL on 4/5/20.
+//
+
+#ifndef E2_BUILDXML_H
+#define E2_BUILDXML_H
+#include <iostream>
+#include <iosfwd>
+#include <vector>
+#include "pugixml/src/pugixml.hpp"
+#include <string>
+#include <sstream>
+#include <mdclog/mdclog.h>
+#include <cstdlib>
+
+using namespace std;
+
+/*
+ * Copied from pugixml samples
+ */
+struct xml_string_writer : pugi::xml_writer {
+    std::string result;
+
+    void write(const void *data, size_t size) override {
+        result.append(static_cast<const char *>(data), size);
+    }
+};
+// end::code[]
+
+//struct xml_memory_writer : pugi::xml_writer {
+//    char *buffer;
+//    size_t capacity;
+//    size_t result;
+//
+//    xml_memory_writer() : buffer(nullptr), capacity(0), result(0) {
+//    }
+//
+//    xml_memory_writer(char *buffer, size_t capacity) : buffer(buffer), capacity(capacity), result(0) {
+//    }
+//
+//    [[nodiscard]] size_t written_size() const {
+//        return result < capacity ? result : capacity;
+//    }
+//
+//    void write(const void *data, size_t size) override {
+//        if (result < capacity) {
+//            size_t chunk = (capacity - result < size) ? capacity - result : size;
+//
+//            memcpy(buffer + result, data, chunk);
+//        }
+//        result += size;
+//    }
+//};
+
+std::string node_to_string(pugi::xml_node node) {
+    xml_string_writer writer;
+    node.print(writer);
+
+    return writer.result;
+}
+
+
+int buildXmlData(const string &messageName, const string &ieName, vector<string> &RANfunctionsAdded, unsigned char *buffer, size_t size) {
+    pugi::xml_document doc;
+
+    doc.reset();
+    pugi::xml_parse_result result = doc.load_buffer((const char *)buffer, size);
+    if (result) {
+        unsigned int index = 0;
+        for (auto tool : doc.child("E2AP-PDU")
+                .child("initiatingMessage")
+                .child("value")
+                .child(messageName.c_str())
+                .child("protocolIEs")
+                .children(ieName.c_str())) {
+            // there can be many ieName entries in the messageName so we need only the ones that containes E2SM continers
+            auto node = tool.child("id");  // get the id to identify the type of the contained message
+            if (node.empty()) {
+                mdclog_write(MDCLOG_ERR, "Failed to find ID node in the XML. File %s, line %d",
+                        __FILE__, __LINE__);
+                continue;
+            }
+            if (strcmp(node.name(), "id") == 0 && strcmp(node.child_value(), "10") == 0) {
+                auto nodea = tool.child("value").
+                        child("RANfunctions-List").
+                        children("ProtocolIE-SingleContainer");
+
+                for (auto n1 : nodea) {
+                    auto n2 = n1.child("value").child("RANfunction-Item").child("ranFunctionDefinition");
+                    n2.remove_children();
+                    string val = RANfunctionsAdded.at(index++);
+                    // here we get vector with counter
+                    n2.append_child(pugi::node_pcdata).set_value(val.c_str());
+                    if (mdclog_level_get() >= MDCLOG_DEBUG) {
+                        mdclog_write(MDCLOG_DEBUG, "entry %s Replaced with : %s", n2.name(), n2.child_value());
+                    }
+                }
+            } else {
+                if (mdclog_level_get() >= MDCLOG_DEBUG) {
+                    mdclog_write(MDCLOG_DEBUG, "Entry %s = value %s skipped", node.name(), node.child_value());
+                }
+                continue;
+            }
+        }
+
+        auto res = node_to_string(doc);
+        memcpy(buffer, res.c_str(), res.length());
+        doc.reset();
+    } else {
+        mdclog_write(MDCLOG_ERR, "Error loading xml string");
+        return -1;
+    }
+    return 0;
+
+}
+
+#endif //E2_BUILDXML_H