blob: 221f4822a78899c63184e079091732795a5a477d [file] [log] [blame]
/*
* Copyright (C) 2018 CESNET, https://photonics.cesnet.cz/
* Copyright (C) 2018 FIT CVUT, https://fit.cvut.cz/
*
* Written by Václav Kubernát <kubervac@fit.cvut.cz>
*
*/
#include <sysrepo-cpp/Session.hpp>
#include "sysrepo_access.hpp"
#include "yang_schema.hpp"
leaf_data_ leafValueFromVal(const sysrepo::S_Val& value)
{
using namespace std::string_literals;
switch (value->type()) {
case SR_INT8_T:
return value->data()->get_int8();
case SR_UINT8_T:
return value->data()->get_uint8();
case SR_INT16_T:
return value->data()->get_int16();
case SR_UINT16_T:
return value->data()->get_uint16();
case SR_INT32_T:
return value->data()->get_int32();
case SR_UINT32_T:
return value->data()->get_uint32();
case SR_INT64_T:
return value->data()->get_int64();
case SR_UINT64_T:
return value->data()->get_uint64();
case SR_BOOL_T:
return value->data()->get_bool();
case SR_STRING_T:
return std::string(value->data()->get_string());
case SR_ENUM_T:
return enum_{std::string(value->data()->get_enum())};
case SR_DECIMAL64_T:
return value->data()->get_decimal64();
case SR_CONTAINER_T:
return special_{SpecialValue::Container};
case SR_CONTAINER_PRESENCE_T:
return special_{SpecialValue::PresenceContainer};
case SR_LIST_T:
return special_{SpecialValue::List};
default: // TODO: implement all types
return value->val_to_string();
}
}
struct valFromValue : boost::static_visitor<sysrepo::S_Val> {
sysrepo::S_Val operator()(const enum_& value) const
{
return std::make_shared<sysrepo::Val>(value.m_value.c_str(), SR_ENUM_T);
}
sysrepo::S_Val operator()(const binary_& value) const
{
return std::make_shared<sysrepo::Val>(value.m_value.c_str(), SR_BINARY_T);
}
sysrepo::S_Val operator()(const identityRef_& value) const
{
auto res = value.m_prefix.value().m_name + ":" + value.m_value;
return std::make_shared<sysrepo::Val>(res.c_str(), SR_IDENTITYREF_T);
}
sysrepo::S_Val operator()(const special_& value) const
{
throw std::runtime_error("Tried constructing S_Val from a " + specialValueToString(value));
}
sysrepo::S_Val operator()(const std::string& value) const
{
return std::make_shared<sysrepo::Val>(value.c_str());
}
template <typename T>
sysrepo::S_Val operator()(const T& value) const
{
return std::make_shared<sysrepo::Val>(value);
}
};
SysrepoAccess::~SysrepoAccess() = default;
SysrepoAccess::SysrepoAccess(const std::string& appname)
: m_connection(new sysrepo::Connection(appname.c_str()))
, m_schema(new YangSchema())
{
try {
m_session = std::make_shared<sysrepo::Session>(m_connection);
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
// If fetching a submodule, sysrepo::Session::get_schema will determine the revision from the main module.
// That's why submoduleRevision is ignored.
m_schema->registerModuleCallback([this](const char* moduleName, const char* revision, const char* submodule, [[maybe_unused]] const char* submoduleRevision) {
return fetchSchema(moduleName, revision, submodule);
});
for (const auto& it : listSchemas()) {
if (it->implemented()) {
m_schema->loadModule(it->module_name());
for (unsigned int i = 0; i < it->enabled_feature_cnt(); i++) {
m_schema->enableFeature(it->module_name(), it->enabled_features(i));
}
}
}
}
std::map<std::string, leaf_data_> SysrepoAccess::getItems(const std::string& path)
{
using namespace std::string_literals;
std::map<std::string, leaf_data_> res;
auto fillMap = [&res](auto items) {
if (!items)
return;
for (unsigned int i = 0; i < items->val_cnt(); i++) {
res.emplace(items->val(i)->xpath(), leafValueFromVal(items->val(i)));
}
};
try {
if (path == "/") {
// Sysrepo doesn't have a root node ("/"), so we take all top-level nodes from all schemas
auto schemas = m_session->list_schemas();
for (unsigned int i = 0; i < schemas->schema_cnt(); i++) {
fillMap(m_session->get_items(("/"s + schemas->schema(i)->module_name() + ":*//.").c_str()));
}
} else {
fillMap(m_session->get_items((path + "//.").c_str()));
}
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
return res;
}
void SysrepoAccess::setLeaf(const std::string& path, leaf_data_ value)
{
try {
m_session->set_item(path.c_str(), boost::apply_visitor(valFromValue(), value));
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
}
void SysrepoAccess::createPresenceContainer(const std::string& path)
{
try {
m_session->set_item(path.c_str());
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
}
void SysrepoAccess::deletePresenceContainer(const std::string& path)
{
try {
m_session->delete_item(path.c_str());
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
}
void SysrepoAccess::createListInstance(const std::string& path)
{
try {
m_session->set_item(path.c_str());
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
}
void SysrepoAccess::deleteListInstance(const std::string& path)
{
try {
m_session->delete_item(path.c_str());
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
}
void SysrepoAccess::commitChanges()
{
try {
m_session->commit();
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
}
void SysrepoAccess::discardChanges()
{
try {
m_session->discard_changes();
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
}
std::string SysrepoAccess::fetchSchema(const char* module, const char* revision, const char* submodule)
{
std::string schema;
try {
schema = m_session->get_schema(module, revision, submodule, SR_SCHEMA_YANG);
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
if (schema.empty())
throw std::runtime_error(std::string("Module ") + module + " not available");
return schema;
}
std::vector<std::shared_ptr<sysrepo::Yang_Schema>> SysrepoAccess::listSchemas()
{
std::vector<sysrepo::S_Yang_Schema> res;
std::shared_ptr<sysrepo::Yang_Schemas> schemas;
try {
schemas = m_session->list_schemas();
} catch (sysrepo::sysrepo_exception& ex) {
reportErrors();
}
for (unsigned int i = 0; i < schemas->schema_cnt(); i++) {
auto schema = schemas->schema(i);
res.push_back(schema);
}
return res;
}
std::shared_ptr<Schema> SysrepoAccess::schema()
{
return m_schema;
}
[[noreturn]] void SysrepoAccess::reportErrors()
{
// I only use get_last_errors to get error info, since the error code from
// sysrepo_exception doesn't really give any meaningful information. For
// example an "invalid argument" error could mean a node isn't enabled, or
// it could mean something totally different and there is no documentation
// for that, so it's better to just use the message sysrepo gives me.
auto srErrors = m_session->get_last_errors();
std::vector<DatastoreError> res;
for (size_t i = 0; i < srErrors->error_cnt(); i++) {
auto error = srErrors->error(i);
res.emplace_back(error->message(), error->xpath() ? std::optional<std::string>{error->xpath()} : std::nullopt);
}
throw DatastoreException(res);
}