Implement the NetconfAccess class
Change-Id: Idd63318364edd424e9c477f26db3c6d032721e8a
diff --git a/src/netconf_access.cpp b/src/netconf_access.cpp
new file mode 100644
index 0000000..9974fca
--- /dev/null
+++ b/src/netconf_access.cpp
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2019 CESNET, https://photonics.cesnet.cz/
+ *
+ * Written by Václav Kubernát <kubernat@cesnet.cz>
+ *
+*/
+
+#include <libyang/Libyang.hpp>
+#include <libyang/Tree_Data.hpp>
+#include "netconf-client.h"
+#include "netconf_access.hpp"
+#include "utils.hpp"
+#include "yang_schema.hpp"
+
+leaf_data_ leafValueFromValue(const libyang::S_Value& value, LY_DATA_TYPE type)
+{
+ using namespace std::string_literals;
+ switch (type) {
+ case LY_TYPE_INT8:
+ return value->int8();
+ case LY_TYPE_INT16:
+ return value->int16();
+ case LY_TYPE_INT32:
+ return value->int32();
+ case LY_TYPE_INT64:
+ return value->int64();
+ case LY_TYPE_UINT8:
+ return value->uint8();
+ case LY_TYPE_UINT16:
+ return value->uint16();
+ case LY_TYPE_UINT32:
+ return value->uintu32();
+ case LY_TYPE_UINT64:
+ return value->uint64();
+ case LY_TYPE_BOOL:
+ return value->bln();
+ case LY_TYPE_STRING:
+ return std::string(value->string());
+ case LY_TYPE_ENUM:
+ return std::string(value->enm()->name());
+ default: // TODO: implement all types
+ return "(can't print)"s;
+ }
+}
+
+NetconfAccess::~NetconfAccess() = default;
+
+std::map<std::string, leaf_data_> NetconfAccess::getItems(const std::string& path)
+{
+ using namespace std::string_literals;
+ std::map<std::string, leaf_data_> res;
+
+ // This is very similar to the fillMap lambda in SysrepoAccess, however,
+ // Sysrepo returns a weird array-like structure, while libnetconf
+ // returns libyang::Data_Node
+ auto fillMap = [&res](auto items) {
+ for (const auto& it : items) {
+ if (!it)
+ continue;
+ if (it->schema()->nodetype() == LYS_LEAF) {
+ libyang::Data_Node_Leaf_List leaf(it);
+ res.emplace(leaf.path(), leafValueFromValue(leaf.value(), leaf.leaf_type()->base()));
+ }
+ }
+ };
+
+ if (path == "/") {
+ for (auto it : m_session->getConfig(NC_DATASTORE_RUNNING)->tree_for()) {
+ fillMap(it->tree_dfs());
+ }
+ } else {
+ auto data = m_session->getConfig(NC_DATASTORE_RUNNING, path);
+ fillMap(data->tree_dfs());
+ }
+
+ return res;
+}
+
+void NetconfAccess::datastoreInit()
+{
+ m_schema->registerModuleCallback([this](const char* moduleName, const char* revision, const char* submodule) {
+ return fetchSchema(moduleName,
+ revision ? std::optional{revision} : std::nullopt,
+ submodule ? std::optional{submodule} : std::nullopt);
+ });
+
+ for (const auto& it : listImplementedSchemas()) {
+ m_schema->loadModule(it);
+ }
+}
+
+NetconfAccess::NetconfAccess(const std::string& hostname, uint16_t port, const std::string& user, const std::string& pubKey, const std::string& privKey)
+ : m_schema(new YangSchema())
+{
+ m_session = libnetconf::client::Session::connectPubkey(hostname, port, user, pubKey, privKey);
+ datastoreInit();
+}
+
+NetconfAccess::NetconfAccess(const std::string& socketPath)
+ : m_schema(new YangSchema())
+{
+ m_session = libnetconf::client::Session::connectSocket(socketPath);
+ datastoreInit();
+}
+
+void NetconfAccess::setLeaf(const std::string& path, leaf_data_ value)
+{
+ auto node = m_schema->dataNodeFromPath(path, leafDataToString(value));
+ doEditFromDataNode(node);
+}
+
+void NetconfAccess::createPresenceContainer(const std::string& path)
+{
+ auto node = m_schema->dataNodeFromPath(path);
+ doEditFromDataNode(node);
+}
+
+void NetconfAccess::deletePresenceContainer(const std::string& path)
+{
+ auto node = m_schema->dataNodeFromPath(path);
+ node->insert_attr(m_schema->getYangModule("ietf-netconf"), "operation", "delete");
+ doEditFromDataNode(node);
+}
+
+void NetconfAccess::createListInstance(const std::string& path)
+{
+ auto node = m_schema->dataNodeFromPath(path);
+ doEditFromDataNode(node);
+}
+
+void NetconfAccess::deleteListInstance(const std::string& path)
+{
+ auto node = m_schema->dataNodeFromPath(path);
+ node->child()->insert_attr(m_schema->getYangModule("ietf-netconf"), "operation", "delete");
+ doEditFromDataNode(node);
+}
+
+void NetconfAccess::doEditFromDataNode(std::shared_ptr<libyang::Data_Node> dataNode)
+{
+ auto data = dataNode->print_mem(LYD_XML, 0);
+ m_session->editConfig(NC_DATASTORE_CANDIDATE, NC_RPC_EDIT_DFLTOP_MERGE, NC_RPC_EDIT_TESTOPT_TESTSET, NC_RPC_EDIT_ERROPT_STOP, data);
+}
+
+void NetconfAccess::commitChanges()
+{
+ m_session->commit();
+}
+
+void NetconfAccess::discardChanges()
+{
+ m_session->discard();
+}
+
+std::string NetconfAccess::fetchSchema(const std::string_view module, const std::optional<std::string_view> revision, const std::optional<std::string_view>)
+{
+ return m_session->getSchema(module, revision);
+}
+
+std::vector<std::string> NetconfAccess::listImplementedSchemas()
+{
+ auto data = m_session->get("/ietf-netconf-monitoring:netconf-state/schemas");
+ auto set = data->find_path("/ietf-netconf-monitoring:netconf-state/schemas/schema/identifier");
+
+ std::vector<std::string> res;
+ for (auto it : set->data()) {
+ if (it->schema()->nodetype() == LYS_LEAF) {
+ libyang::Data_Node_Leaf_List leaf(it);
+ res.push_back(leaf.value_str());
+ }
+ }
+ return res;
+}
+
+std::shared_ptr<Schema> NetconfAccess::schema()
+{
+ return m_schema;
+}