Control socket translation between YANG and JSON. More...

#include <translator_control_socket.h>

Inheritance diagram for isc::yang::TranslatorControlSocket:

Public Member Functions
	TranslatorControlSocket (sysrepo::Session session, const std::string &model)
	Constructor.

virtual	~TranslatorControlSocket ()=default
	Destructor.

isc::data::ElementPtr	getControlSocket (libyang::DataNode const &data_node)
	Translate a control socket from YANG to JSON.

isc::data::ElementPtr	getControlSocketFromAbsoluteXpath (std::string const &xpath)
	Translate a control socket from YANG to JSON.

void	setControlSocket (const std::string &xpath, isc::data::ConstElementPtr elem)
	Translate and set control socket from JSON to YANG.

Public Member Functions inherited from isc::yang::Translator
	Translator (sysrepo::Session session, const std::string &model)
	Constructor.

virtual	~Translator ()=default
	Destructor.

template<typename T >
void	checkAndGet (isc::data::ElementPtr const &storage, libyang::DataNode const &data_node, std::string const &xpath, T translate) const
	Calls {translate} for the element found at {xpath} relative to {data_node} and sets the result in {storage} with the {xpath} key.

void	checkAndGetAndJsonifyLeaf (isc::data::ElementPtr &storage, libyang::DataNode const &data_node, const std::string &name) const
	Retrieves a child YANG data node identified by name from the given parent YANG container node, converts it from string to JSON and stores it in the specified storage.

template<typename T >
void	checkAndGetDiverging (isc::data::ElementPtr const &storage, libyang::DataNode const &data_node, std::string const &key, std::string const &xpath, T translate) const
	Calls {translate} for the element found at {xpath} relative to {data_node} and sets the result in {storage} with the {key} key.

void	checkAndGetDivergingLeaf (isc::data::ElementPtr &storage, libyang::DataNode const &data_node, std::string const &name, std::string const &yang_name) const
	Retrieves a child YANG data node identified by name from the given parent YANG container node and stores it in the specified storage.

void	checkAndGetLeaf (isc::data::ElementPtr &storage, libyang::DataNode const &data_node, std::string const &name) const
	Retrieves a child YANG data node identified by name from the given parent YANG container node and stores it in the specified storage.

void	checkAndSetDivergingLeaf (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name, std::string const &yang_name, libyang::LeafBaseType const type)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

void	checkAndSetLeaf (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name, libyang::LeafBaseType const type)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

void	checkAndSetLeafList (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name, libyang::LeafBaseType const type)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath as a leaf-list.

void	checkAndSetUserContext (isc::data::ConstElementPtr const &from, std::string const &xpath)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

void	checkAndStringifyAndSetLeaf (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

void	deleteItem (const std::string &xpath)
	Delete basic value from YANG.

libyang::DataNode	findXPath (std::string const &xpath) const
	Retrieves a YANG data node by xpath.

template<typename functor_t >
void	forAll (std::string const &xpath, functor_t f) const
	Run a function for a node and all its children.

std::optional< libyang::DataNode >	getData (std::string const &xpath) const
	Get a YANG data node found at the given absolute xpath.

isc::data::ElementPtr	getItem (libyang::DataNode const &data_node, std::string const &xpath) const
	Translate a basic value from YANG to JSON for a given xpath that is relative to the given source node.

isc::data::ElementPtr	getItemFromAbsoluteXpath (std::string const &xpath) const
	Translate a basic value from YANG to JSON for a given absolute xpath.

template<typename T >
isc::data::ElementPtr	getList (libyang::DataNode const &data_node, std::string const &xpath, T &t, isc::data::ElementPtr(T::*f)(libyang::DataNode const &)) const
	Retrieve a list as ElementPtr from sysrepo from a certain xpath.

void	getMandatoryDivergingLeaf (isc::data::ElementPtr &storage, libyang::DataNode const &data_node, std::string const &name, std::string const &yang_name) const
	Retrieves a child YANG data node identified by one name from the given parent YANG container node and stores it in the specified storage under a different name.

void	getMandatoryLeaf (isc::data::ElementPtr &storage, libyang::DataNode const &data_node, std::string const &name) const
	Retrieves a child YANG data node identified by name from the given parent YANG container node and stores it in the specified storage.

bool	schemaNodeExists (std::string const &xpath) const
	Checks whether a YANG node exists in the schema.

void	setItem (const std::string &xpath, isc::data::ConstElementPtr const elem, libyang::LeafBaseType const type)
	Translate and set basic value from JSON to YANG.

void	setMandatoryDivergingLeaf (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name, std::string const &yang_name, libyang::LeafBaseType const type)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

void	setMandatoryLeaf (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name, libyang::LeafBaseType const type)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

Protected Member Functions
isc::data::ElementPtr	getControlSocketKea (libyang::DataNode const &data_node)
	getControlSocket JSON for kea models.

void	setControlSocketKea (const std::string &xpath, isc::data::ConstElementPtr elem)
	setControlSocket for kea models.

Additional Inherited Members
Static Public Member Functions inherited from isc::yang::Translator
static isc::data::ElementPtr	translateFromYang (std::optional< libyang::DataNode > data_node)
	Translate basic value from the given YANG data node to JSON element.

static std::optional< std::string >	translateToYang (isc::data::ConstElementPtr const &elem, libyang::LeafBaseType const type)
	Translate basic value from JSON to YANG.

Protected Types inherited from isc::yang::Translator
using	Deserializer = std::unordered_map< libyang::LeafBaseType, std::function< isc::data::ElementPtr const (std::string const &)> >
	Maps YANG types to functions that transform a YANG type into an ElementPtr.

using	Serializer = std::unordered_map< libyang::LeafBaseType, std::function< std::string const (std::string const &)> >
	Maps YANG types to functions that transform the string representation of an Element into a string that can be passed into Session::setItem().

Static Protected Member Functions inherited from isc::yang::Translator
static std::string	decode64 (std::string const &input)
	Decode a YANG element of binary type to a string that can be stored in an Element::string JSON.

static std::string	encode64 (std::string const &input)
	Encode a string such that it can be stored in a YANG element of binary type.

static Deserializer	initializeDeserializer ()
	Initializes the deserializer which is used to translate a YANG node to an ElementPtr.

static Serializer	initializeSerializer ()
	Initializes the serializer which is used to translate the string value of an Element to a string that can be passed into Session::setItem().

Protected Attributes inherited from isc::yang::Translator
std::string	model_
	The model.

sysrepo::Session	session_
	The sysrepo session.

Detailed Description

Control socket translation between YANG and JSON.

JSON syntax for all Kea servers with command channel is:

"control-socket": {
    "socket-type": "<socket type>",
    "socket-name": "<socket name>",
    "user-context": { <json map> },
    "comment": "<comment>"
}

YANG syntax is:

+--rw control-socket!
+--rw socket-name     string
+--rw socket-type     enumeration
+--rw user-context?   user-context

An example in JSON and YANG formats:

{
    "socket-name": "/tmp/kea.sock",
    "socket-type": "unix",
    "user-context": { "foo": 1 }
}

/kea-ctrl-agent:config (container)
/kea-ctrl-agent:config/control-sockets (container)
/kea-ctrl-agent:config/control-sockets/
   socket[server-type='dhcp4'] (list instance)
/kea-ctrl-agent:config/control-sockets/socket[server-type='dhcp4']/
   server-type = dhcp4
/kea-ctrl-agent:config/control-sockets/socket[server-type='dhcp4']/
   control-socket (container)
/kea-ctrl-agent:config/control-sockets/socket[server-type='dhcp4']/
   control-socket/socket-name = /tmp/kea.sock
/kea-ctrl-agent:config/control-sockets/socket[server-type='dhcp4']/
   control-socket/socket-type = unix
/kea-ctrl-agent:config/control-sockets/socket[server-type='dhcp4']/
   control-socket/user-context = { \"foo\": 1 }

A translator class for converting a control socket between YANG and JSON.

Supports the following models:

kea-dhcp4-server
kea-dhcp6-server
kea-dhcp-ddns
kea-ctrl-agent

Definition at line 68 of file translator_control_socket.h.

Constructor & Destructor Documentation

◆ TranslatorControlSocket()

isc::yang::TranslatorControlSocket::TranslatorControlSocket	(	sysrepo::Session	session,
		const std::string &	model
	)

Constructor.

Parameters

session	Sysrepo session.
model	Model name.

Definition at line 22 of file translator_control_socket.cc.

◆ ~TranslatorControlSocket()

virtual isc::yang::TranslatorControlSocket::~TranslatorControlSocket ( )

virtualdefault

Destructor.

Member Function Documentation

◆ getControlSocket()

ElementPtr isc::yang::TranslatorControlSocket::getControlSocket ( libyang::DataNode const & data_node )

Translate a control socket from YANG to JSON.

Parameters

data_node the YANG node representing the control socket

Returns: the JSON representation of the control socket

Exceptions

NetconfError when sysrepo raises an error.

Definition at line 28 of file translator_control_socket.cc.

References getControlSocketKea(), isc_throw, isc::yang::Translator::model_, and isc::Exception::what().

Referenced by getControlSocketFromAbsoluteXpath(), and isc::yang::TranslatorConfig::getServerKeaDhcpCommon().

Here is the call graph for this function:

◆ getControlSocketFromAbsoluteXpath()

ElementPtr isc::yang::TranslatorControlSocket::getControlSocketFromAbsoluteXpath ( std::string const & xpath )

Translate a control socket from YANG to JSON.

Note: This is a computationally expensive operation that makes a lookup in the sysrepo datastore by calling Session::getData(). It should be used sparingly in production code, mainly to get an initial data node to work with. It may be used at will in unit tests. Use getControlSocket(libyang::DataNode) as a scalable alternative.

Parameters

xpath The xpath of the control socket.