blob: 92c0ae97a7c6f269602c30e3251f3208e6a260db [file] [log] [blame]
/*
* Copyright (C) 2019 CESNET, https://photonics.cesnet.cz/
*
* Written by Václav Kubernát <kubernat@cesnet.cz>
*
*/
#include <libnetconf2-cpp/netconf-client.hpp>
#include "libyang_utils.hpp"
#include "netconf_access.hpp"
#include "utils.hpp"
#include "yang_schema.hpp"
NetconfAccess::~NetconfAccess() = default;
namespace {
auto targetToDs_get(const DatastoreTarget target)
{
switch (target) {
case DatastoreTarget::Operational:
return libnetconf::NmdaDatastore::Operational;
case DatastoreTarget::Running:
return libnetconf::NmdaDatastore::Running;
case DatastoreTarget::Startup:
return libnetconf::NmdaDatastore::Startup;
}
__builtin_unreachable();
}
auto targetToDs_set(const DatastoreTarget target)
{
switch (target) {
case DatastoreTarget::Operational:
case DatastoreTarget::Running:
return libnetconf::NmdaDatastore::Candidate;
case DatastoreTarget::Startup:
return libnetconf::NmdaDatastore::Startup;
}
__builtin_unreachable();
}
}
DatastoreAccess::Tree NetconfAccess::getItems(const std::string& path) const
{
Tree res;
auto config = [this, &path] {
if (m_serverHasNMDA) {
return m_session->getData(targetToDs_get(m_target), (path != "/") ? std::optional{path} : std::nullopt);
}
return m_session->get((path != "/") ? std::optional{path} : std::nullopt);
}();
if (config) {
lyNodesToTree(res, config->siblings());
}
return res;
}
NetconfAccess::NetconfAccess(const int source, const int sink)
: m_context(std::nullopt, libyang::ContextOptions::SetPrivParsed)
, m_session(libnetconf::client::Session::connectFd(source, sink, m_context))
, m_schema(std::make_shared<YangSchema>(m_context))
{
checkNMDA();
}
NetconfAccess::NetconfAccess(std::unique_ptr<libnetconf::client::Session>&& session)
: m_session(std::move(session))
, m_schema(std::make_shared<YangSchema>(m_session->libyangContext()))
{
checkNMDA();
}
NetconfAccess::NetconfAccess(const std::string& socketPath)
: m_context(std::nullopt, libyang::ContextOptions::SetPrivParsed)
, m_session(libnetconf::client::Session::connectSocket(socketPath, m_context))
, m_schema(std::make_shared<YangSchema>(m_context))
{
checkNMDA();
}
void NetconfAccess::checkNMDA()
{
auto nmdaMod = m_schema->getYangModule("ietf-netconf-nmda");
m_serverHasNMDA = nmdaMod && nmdaMod->implemented();
}
void NetconfAccess::setNcLogLevel(libnetconf::LogLevel level)
{
libnetconf::client::setLogLevel(level);
}
void NetconfAccess::setNcLogCallback(const LogCb& callback)
{
libnetconf::client::setLogCallback(callback);
}
void NetconfAccess::setLeaf(const std::string& path, leaf_data_ value)
{
auto lyValue = value.type() == typeid(empty_) ? std::nullopt : std::optional(leafDataToString(value));
auto nodes = m_schema->dataNodeFromPath(path, lyValue);
doEditFromDataNode(*nodes.createdParent);
}
void NetconfAccess::createItem(const std::string& path)
{
auto nodes = m_schema->dataNodeFromPath(path);
doEditFromDataNode(*nodes.createdParent);
}
void NetconfAccess::deleteItem(const std::string& path)
{
auto nodes = m_schema->dataNodeFromPath(path);
// When deleting leafs, `nodes.newNode` is opaque, because the leaf does not have a value. We need to use
// newAttrOpaqueJSON for opaque leafs.
if (nodes.createdNode->isOpaque()) {
nodes.createdNode->newAttrOpaqueJSON("ietf-netconf", "ietf-netconf:operation", "delete");
} else {
nodes.createdNode->newMeta(*m_schema->getYangModule("ietf-netconf"), "operation", "delete");
}
doEditFromDataNode(*nodes.createdParent);
}
struct impl_toYangInsert {
std::string operator()(yang::move::Absolute& absolute)
{
return absolute == yang::move::Absolute::Begin ? "first" : "last";
}
std::string operator()(yang::move::Relative& relative)
{
return relative.m_position == yang::move::Relative::Position::After ? "after" : "before";
}
};
std::string toYangInsert(std::variant<yang::move::Absolute, yang::move::Relative> move)
{
return std::visit(impl_toYangInsert{}, move);
}
void NetconfAccess::moveItem(const std::string& source, std::variant<yang::move::Absolute, yang::move::Relative> move)
{
auto nodes = m_schema->dataNodeFromPath(source);
auto sourceNode = *(nodes.createdNode->findPath(source));
auto yangModule = *m_schema->getYangModule("yang");
sourceNode.newMeta(yangModule, "insert", toYangInsert(move));
if (std::holds_alternative<yang::move::Relative>(move)) {
auto relative = std::get<yang::move::Relative>(move);
if (m_schema->nodeType(source) == yang::NodeTypes::LeafList) {
sourceNode.newMeta(yangModule, "value", leafDataToString(relative.m_path.at(".")));
} else {
sourceNode.newMeta(yangModule, "key", instanceToString(relative.m_path, std::string{nodes.createdNode->schema().module().name()}));
}
}
doEditFromDataNode(sourceNode);
}
void NetconfAccess::doEditFromDataNode(libyang::DataNode dataNode)
{
auto data = dataNode.printStr(libyang::DataFormat::XML, libyang::PrintFlags::WithSiblings);
if (m_serverHasNMDA) {
m_session->editData(targetToDs_set(m_target), std::string{*data});
} else {
m_session->editConfig(
libnetconf::Datastore::Candidate,
libnetconf::EditDefaultOp::Merge,
libnetconf::EditTestOpt::TestSet,
libnetconf::EditErrorOpt::Stop,
std::string{*data});
}
}
void NetconfAccess::commitChanges()
{
m_session->commit();
}
void NetconfAccess::discardChanges()
{
m_session->discard();
}
DatastoreAccess::Tree NetconfAccess::execute(const std::string& path, const Tree& input)
{
auto inputNode = treeToRpcInput(m_session->libyangContext(), path, input);
auto data = inputNode.printStr(libyang::DataFormat::XML, libyang::PrintFlags::WithSiblings);
auto output = m_session->rpc_or_action(std::string{*data});
if (!output) {
return {};
}
return rpcOutputToTree(*output);
}
libnetconf::Datastore toNcDatastore(Datastore datastore)
{
switch (datastore) {
case Datastore::Running:
return libnetconf::Datastore::Running;
case Datastore::Startup:
return libnetconf::Datastore::Startup;
}
__builtin_unreachable();
}
void NetconfAccess::copyConfig(const Datastore source, const Datastore destination)
{
m_session->copyConfig(toNcDatastore(source), toNcDatastore(destination));
}
std::shared_ptr<Schema> NetconfAccess::schema()
{
return m_schema;
}
std::vector<ListInstance> NetconfAccess::listInstances(const std::string& path)
{
std::vector<ListInstance> res;
auto keys = m_session->libyangContext().findXPath(path).front().asList().keys();
auto nodes = m_session->libyangContext().newPath2(path, std::nullopt, libyang::CreationOptions::Opaque);
// Here we create a tree with "selection leafs" for all they keys of our wanted list. These leafs tell NETCONF, that
// we only want the list's keys and not any other data.
for (const auto& keyLeaf : keys) {
// Selection leafs need to be inserted directly to the list using relative paths, that's why `newNode` is used
// here.
nodes.createdNode->newPath(keyLeaf.name().data(), std::nullopt, libyang::CreationOptions::Opaque);
}
// Have to use `newParent` in case our wanted list is a nested list. With `newNode` I would only send the inner
// nested list and not the whole tree.
auto instances = m_session->get(std::string{*nodes.createdParent->printStr(libyang::DataFormat::XML, libyang::PrintFlags::WithSiblings)});
if (!instances) {
return res;
}
for (const auto& instance : instances->findXPath(path)) {
ListInstance instanceRes;
for (const auto& keyLeaf : instance.immediateChildren()) {
// FIXME: even though we specified we only want the key leafs, Netopeer disregards that and sends more data,
// even lists and other stuff. We only want keys, so filter out non-leafs and non-keys
// https://github.com/CESNET/netopeer2/issues/825
if (keyLeaf.schema().nodeType() != libyang::NodeType::Leaf) {
continue;
}
if (!keyLeaf.schema().asLeaf().isKey()) {
continue;
}
auto leafData = keyLeaf.asTerm();
instanceRes.insert({std::string{leafData.schema().name()}, leafValueFromNode(leafData)});
}
res.emplace_back(instanceRes);
}
return res;
}
std::string NetconfAccess::dump(const DataFormat format) const
{
auto config = m_session->get();
if (!config) {
return "";
}
auto str = config->printStr(format == DataFormat::Xml ? libyang::DataFormat::XML : libyang::DataFormat::JSON, libyang::PrintFlags::WithSiblings);
if (!str) {
return "";
}
return std::string{*str};
}