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diff --git a/src/lib/d2srv/d2_config.h b/src/lib/d2srv/d2_config.h new file mode 100644 index 0000000..6162ec5 --- /dev/null +++ b/src/lib/d2srv/d2_config.h @@ -0,0 +1,926 @@ +// Copyright (C) 2013-2021 Internet Systems Consortium, Inc. ("ISC") +// +// This Source Code Form is subject to the terms of the Mozilla Public +// License, v. 2.0. If a copy of the MPL was not distributed with this +// file, You can obtain one at http://mozilla.org/MPL/2.0/. + +#ifndef D2_CONFIG_H +#define D2_CONFIG_H + +#include <asiolink/io_service.h> +#include <cc/data.h> +#include <cc/simple_parser.h> +#include <cc/cfg_to_element.h> +#include <cc/user_context.h> +#include <d2srv/d2_tsig_key.h> +#include <dhcpsrv/parsers/dhcp_parsers.h> +#include <exceptions/exceptions.h> +#include <process/d_cfg_mgr.h> + +#include <boost/foreach.hpp> + +#include <stdint.h> +#include <string> + +namespace isc { +namespace d2 { + +/// @file d2_config.h +/// @brief A collection of classes for housing and parsing the application +/// configuration necessary for the DHCP-DDNS application (aka D2). +/// +/// This file contains the class declarations for the class hierarchy created +/// from the D2 configuration and the parser classes used to create it. +/// The application configuration consists of a set of scalar parameters, +/// a list of TSIG keys, and two managed lists of domains: one list for +/// forward domains and one list for reverse domains. +/// +/// The key list consists of one or more TSIG keys, each entry described by +/// a name, the algorithm method name, optionally the minimum truncated +/// length, and its secret key component. +/// +/// Each managed domain list consists of a list one or more domains and is +/// represented by the class DdnsDomainListMgr. +/// +/// Each domain consists of a set of scalars parameters and a list of DNS +/// servers which support that domain. Among its scalars, is key_name, which +/// is the name of the TSIG Key to use for with this domain. This value should +/// map to one of the TSIG Keys in the key list. Domains are represented by +/// the class, DdnsDomain. +/// +/// Each server consists of a set of scalars used to describe the server such +/// that the application can carry out DNS update exchanges with it. Servers +/// are represented by the class, DnsServerInfo. +/// +/// The parsing class hierarchy reflects this same scheme. Working top down: +/// +/// A DdnsDomainListMgrParser parses a managed domain list entry. It handles +/// any scalars which belong to the manager as well as creating and invoking a +/// DdnsDomainListParser to parse its list of domain entries. +/// +/// A DdnsDomainListParser creates and invokes a DdnsDomainParser for each +/// domain entry in its list. +/// +/// A DdnsDomainParser handles the scalars which belong to the domain as well as +/// creating and invoking a DnsSeverInfoListParser to parse its list of server +/// entries. +/// +/// A DnsServerInfoListParser creates and invokes a DnsServerInfoParser for +/// each server entry in its list. +/// +/// A DdnsServerInfoParser handles the scalars which belong to the server. +/// The following is sample configuration in JSON form with extra spacing +/// for clarity: +/// +/// @code +/// { +/// "interface" : "eth1" , +/// "ip-address" : "192.168.1.33" , +/// "port" : 88 , +/// "control-socket": +/// { +/// "socket-type": "unix" , +/// "socket-name": "/tmp/kea-ddns-ctrl-socket" +//// }, +/// "tsig-keys": +//// [ +/// { +/// "name": "d2_key.tmark.org" , +/// "algorithm": "md5" , +/// "secret": "0123456989" +/// } +/// ], +/// "forward-ddns" : +/// { +/// "ddns-domains": +/// [ +/// { +/// "name": "tmark.org." , +/// "key-name": "d2_key.tmark.org" , +/// "dns-servers" : +/// [ +/// { "hostname": "fserver.tmark.org" }, +/// { "hostname": "f2server.tmark.org" } +/// ] +/// }, +/// { +/// "name": "pub.tmark.org." , +/// "key-name": "d2_key.tmark.org" , +/// "dns-servers" : +/// [ +/// { "hostname": "f3server.tmark.org" } +/// ] +/// } +/// ] +/// }, +/// "reverse-ddns" : +/// { +/// "ddns-domains": +/// [ +/// { +/// "name": " 0.168.192.in.addr.arpa." , +/// "key-name": "d2_key.tmark.org" , +/// "dns-servers" : +/// [ +/// { "ip-address": "127.0.0.101" , "port": 100 , +/// "key-name": "d2_key.tmark.org" } +/// ] +/// } +/// ] +/// } +/// } +/// @endcode + +/// @brief Exception thrown when the error during configuration handling +/// occurs. +class D2CfgError : public isc::Exception { +public: + D2CfgError(const char* file, size_t line, const char* what) : + isc::Exception(file, line, what) { }; +}; + +/// @brief Acts as a storage vault for D2 global scalar parameters +class D2Params { +public: + /// @brief Constructor + /// + /// @param ip_address IP address at which D2 should listen for NCRs + /// @param port port on which D2 should listen NCRs + /// @param dns_server_timeout maximum amount of time in milliseconds to + /// wait for a response to a single DNS update request. + /// @param ncr_protocol socket protocol D2 should use to receive NCRS + /// @param ncr_format packet format of the inbound NCRs + /// + /// @throw D2CfgError if: + /// -# ip_address is 0.0.0.0 or :: + /// -# port is 0 + /// -# dns_server_timeout is < 1 + /// -# ncr_protocol is invalid, currently only NCR_UDP is supported + /// -# ncr_format is invalid, currently only FMT_JSON is supported + D2Params(const isc::asiolink::IOAddress& ip_address, + const size_t port, + const size_t dns_server_timeout, + const dhcp_ddns::NameChangeProtocol& ncr_protocol, + const dhcp_ddns::NameChangeFormat& ncr_format); + + /// @brief Default constructor + /// The default constructor creates an instance that has updates disabled. + D2Params(); + + /// @brief Destructor + virtual ~D2Params(); + + /// @brief Return the IP address D2 listens on. + const isc::asiolink::IOAddress& getIpAddress() const { + return(ip_address_); + } + + /// @brief Return the TCP/UPD port D2 listens on. + size_t getPort() const { + return(port_); + } + + /// @brief Return the DNS server timeout value. + size_t getDnsServerTimeout() const { + return(dns_server_timeout_); + } + + /// @brief Return the socket protocol in use. + const dhcp_ddns::NameChangeProtocol& getNcrProtocol() const { + return(ncr_protocol_); + } + + /// @brief Return the expected format of inbound requests (NCRs). + const dhcp_ddns::NameChangeFormat& getNcrFormat() const { + return(ncr_format_); + } + + /// @brief Return summary of the configuration used by D2. + /// + /// The returned summary of the configuration is meant to be appended to + /// the log message informing about the successful completion of the + /// D2 configuration. + /// + /// @return Configuration summary in the textual format. + std::string getConfigSummary() const; + + /// @brief Compares two D2Params's for equality + bool operator == (const D2Params& other) const; + + /// @brief Compares two D2Params's for inequality + bool operator != (const D2Params& other) const; + + /// @brief Generates a string representation of the class contents. + std::string toText() const; + +protected: + /// @brief Validates member values. + /// + /// Method is used by the constructor to validate member contents. + /// Currently checks: + /// -# ip_address is not 0.0.0.0 or :: + /// -# port is not 0 + /// -# dns_server_timeout is 0 + /// -# ncr_protocol is UDP + /// -# ncr_format is JSON + /// + /// @throw D2CfgError if contents are invalid + virtual void validateContents(); + +private: + /// @brief IP address D2 listens on. + isc::asiolink::IOAddress ip_address_; + + /// @brief IP port D2 listens on. + size_t port_; + + /// @brief Timeout for a single DNS packet exchange in milliseconds. + size_t dns_server_timeout_; + + /// @brief The socket protocol to use. + /// Currently only UDP is supported. + dhcp_ddns::NameChangeProtocol ncr_protocol_; + + /// @brief Format of the inbound requests (NCRs). + /// Currently only JSON format is supported. + dhcp_ddns::NameChangeFormat ncr_format_; +}; + +/// @brief Dumps the contents of a D2Params as text to an output stream +/// +/// @param os output stream to which text should be sent +/// @param config D2Param instance to dump +std::ostream& +operator<<(std::ostream& os, const D2Params& config); + +/// @brief Defines a pointer for D2Params instances. +typedef boost::shared_ptr<D2Params> D2ParamsPtr; + +/// @brief Represents a TSIG Key. +/// +/// Acts as both a storage class containing the basic attributes which +/// describe a TSIG Key, as well as owning and providing access to an +/// instance of the actual key (@ref isc::dns::TSIGKey) that can be used +/// by the IO layer for signing and verifying messages. +/// +class TSIGKeyInfo : public isc::data::UserContext, public isc::data::CfgToElement { +public: + /// @brief Defines string values for the supported TSIG algorithms + //@{ + static const char* HMAC_MD5_STR; + static const char* HMAC_SHA1_STR; + static const char* HMAC_SHA256_STR; + static const char* HMAC_SHA224_STR; + static const char* HMAC_SHA384_STR; + static const char* HMAC_SHA512_STR; + //}@ + + /// @brief Constructor + /// + /// @param name the unique label used to identify this key + /// @param algorithm the id of the encryption algorithm this key uses. + /// Currently supported values are (case insensitive): + /// -# "HMAC-MD5" + /// -# "HMAC-SHA1" + /// -# "HMAC-SHA224" + /// -# "HMAC-SHA256" + /// -# "HMAC-SHA384" + /// -# "HMAC-SHA512" + /// + /// @param secret The base-64 encoded secret component for this key. + /// (A suitable string for use here could be obtained by running the + /// BIND 9 dnssec-keygen program; the contents of resulting key file + /// will look similar to: + /// @code + /// Private-key-format: v1.3 + /// Algorithm: 157 (HMAC_MD5) + /// Key: LSWXnfkKZjdPJI5QxlpnfQ== + /// Bits: AAA= + /// Created: 20140515143700 + /// Publish: 20140515143700 + /// Activate: 20140515143700 + /// @endcode + /// where the value the "Key:" entry is the secret component of the key.) + /// @param digestbits the minimum truncated length in bits + /// + /// @throw D2CfgError if values supplied are invalid: + /// name cannot be blank, algorithm must be a supported value, + /// secret must be a non-blank, base64 encoded string. + TSIGKeyInfo(const std::string& name, const std::string& algorithm, + const std::string& secret, uint32_t digestbits = 0); + + /// @brief Destructor + virtual ~TSIGKeyInfo(); + + /// @brief Getter which returns the key's name. + /// + /// @return returns the name as a std::string. + const std::string getName() const { + return (name_); + } + + /// @brief Getter which returns the key's algorithm string ID + /// + /// @return returns the algorithm as a std::string. + const std::string getAlgorithm() const { + return (algorithm_); + } + + /// @brief Getter which returns the key's minimum truncated length + /// + /// @return returns the minimum truncated length or 0 as an uint32_t + uint32_t getDigestbits() const { + return (digestbits_); + } + + /// @brief Getter which returns the key's secret. + /// + /// @return returns the secret as a std::string. + const std::string getSecret() const { + return (secret_); + } + + /// @brief Getter which returns the TSIG key used to sign and verify + /// messages + /// + /// @return const pointer reference to @c D2TsigKeyPtr + const D2TsigKeyPtr& getTSIGKey() const { + return (tsig_key_); + } + + /// @brief Converts algorithm id to dns::TSIGKey algorithm dns::Name + /// + /// @param algorithm_id string value to translate into an algorithm name. + /// Currently supported values are (case insensitive): + /// -# "HMAC-MD5" + /// -# "HMAC-SHA1" + /// -# "HMAC-SHA224" + /// -# "HMAC-SHA256" + /// -# "HMAC-SHA384" + /// -# "HMAC-SHA512" + /// + /// @return const reference to a dns::Name containing the algorithm name + /// @throw BadValue if ID isn't recognized. + static const dns::Name& stringToAlgorithmName(const std::string& + algorithm_id); + + /// @brief Unparse a configuration object + /// + /// @return a pointer to a configuration + virtual isc::data::ElementPtr toElement() const; + +private: + /// @brief Creates the actual TSIG key instance member + /// + /// Replaces this tsig_key member with a key newly created using the key + /// name, algorithm id, digest bits, and secret. + /// This method is currently only called by the constructor, however it + /// could be called post-construction should keys ever support expiration. + /// + /// @throw D2CfgError with an explanation if the key could not be created. + void remakeKey(); + + /// @brief The name of the key. + /// + /// This value is the unique identifier that domains use to + /// to specify which TSIG key they need. + std::string name_; + + /// @brief The string ID of the algorithm that should be used for this key. + std::string algorithm_; + + /// @brief The base64 encoded string secret value component of this key. + std::string secret_; + + /// @brief The minimum truncated length in bits + /// (0 means no truncation is allowed and is the default) + uint32_t digestbits_; + + /// @brief The actual TSIG key. + D2TsigKeyPtr tsig_key_; +}; + +/// @brief Defines a pointer for TSIGKeyInfo instances. +typedef boost::shared_ptr<TSIGKeyInfo> TSIGKeyInfoPtr; + +/// @brief Defines a map of TSIGKeyInfos, keyed by the name. +typedef std::map<std::string, TSIGKeyInfoPtr> TSIGKeyInfoMap; + +/// @brief Defines a iterator pairing of name and TSIGKeyInfo +typedef std::pair<std::string, TSIGKeyInfoPtr> TSIGKeyInfoMapPair; + +/// @brief Defines a pointer to map of TSIGkeyInfos +typedef boost::shared_ptr<TSIGKeyInfoMap> TSIGKeyInfoMapPtr; + + +/// @brief Represents a specific DNS Server. +/// It provides information about the server's network identity and typically +/// belongs to a list of servers supporting DNS for a given domain. It will +/// be used to establish communications with the server to carry out DNS +/// updates. +class DnsServerInfo : public isc::data::UserContext, public isc::data::CfgToElement { +public: + /// @brief defines DNS standard port value + static const uint32_t STANDARD_DNS_PORT = 53; + + /// @brief Constructor + /// + /// @param hostname is the resolvable name of the server. If not blank, + /// then the server address should be resolved at runtime. + /// @param ip_address is the static IP address of the server. If hostname + /// is blank, then this address should be used to connect to the server. + /// @param port is the port number on which the server listens. + /// primarily meant for testing purposes. Normally, DNS traffic is on + /// is port 53. (NOTE the constructing code is responsible for setting + /// the default.) + /// @param enabled is a flag that indicates whether this server is + /// enabled for use. It defaults to true. + /// @param tsig_key_info pointer to the TSIGKeyInfo for the server's key + /// It defaults to an empty pointer, signifying the server has no key. + /// @param inherited_key is a flag that indicates whether the key was + /// inherited from the domain or not. It defaults to true i.e. inherited. + DnsServerInfo(const std::string& hostname, + isc::asiolink::IOAddress ip_address, + uint32_t port = STANDARD_DNS_PORT, + bool enabled = true, + const TSIGKeyInfoPtr& tsig_key_info = TSIGKeyInfoPtr(), + bool inherited_key = true); + + /// @brief Destructor + virtual ~DnsServerInfo(); + + /// @brief Getter which returns the server's hostname. + /// + /// @return the hostname as a std::string. + const std::string getHostname() const { + return (hostname_); + } + + /// @brief Getter which returns the server's port number. + /// + /// @return the port number as a unsigned integer. + uint32_t getPort() const { + return (port_); + } + + /// @brief Getter which returns the server's ip_address. + /// + /// @return the address as an IOAddress reference. + const isc::asiolink::IOAddress& getIpAddress() const { + return (ip_address_); + } + + /// @brief Convenience method which returns whether or not the + /// server is enabled. + /// + /// @return true if the server is enabled, false otherwise. + bool isEnabled() const { + return (enabled_); + } + + /// @brief Sets the server's enabled flag to true. + void enable() { + enabled_ = true; + } + + /// @brief Sets the server's enabled flag to false. + void disable() { + enabled_ = false; + } + + /// @brief Convenience method which returns the server's TSIG key name. + /// + /// @return the key name in a std::string. If server has no TSIG key, + /// the string will be empty. + const std::string getKeyName() const; + + /// @brief Getter which returns the server's TSIGKey info. + /// + /// @return the pointer to the server storage. If the server + /// is not configured to use TSIG the pointer will be empty. + const TSIGKeyInfoPtr& getTSIGKeyInfo() { + return (tsig_key_info_); + } + + /// @brief Returns a text representation for the server. + std::string toText() const; + + /// @brief Unparse a configuration object + /// + /// @return a pointer to a configuration + virtual isc::data::ElementPtr toElement() const; + +private: + /// @brief The resolvable name of the server. If not blank, then the + /// server's IP address should be dynamically resolved at runtime. + std::string hostname_; + + /// @brief The static IP address of the server. When hostname is blank, + /// then this address should be used to connect to the server. + isc::asiolink::IOAddress ip_address_; + + /// @brief The port number on which the server listens for DNS traffic. + uint32_t port_; + + /// @param enabled is a flag that indicates whether this server is + /// enabled for use. It defaults to true. + bool enabled_; + + /// @brief Pointer to the server TSIGKeyInfo. + /// Value is empty if the server is not configured for TSIG. + TSIGKeyInfoPtr tsig_key_info_; + + /// @brief Inherited key. When true the key was inherited from the domain, + /// false otherwise. + bool inherited_key_; +}; + +std::ostream& +operator<<(std::ostream& os, const DnsServerInfo& server); + +/// @brief Defines a pointer for DnsServerInfo instances. +typedef boost::shared_ptr<DnsServerInfo> DnsServerInfoPtr; + +/// @brief Defines a storage container for DnsServerInfo pointers. +typedef std::vector<DnsServerInfoPtr> DnsServerInfoStorage; + +/// @brief Defines a pointer to DnsServerInfo storage containers. +typedef boost::shared_ptr<DnsServerInfoStorage> DnsServerInfoStoragePtr; + + +/// @brief Represents a DNS domain that is may be updated dynamically. +/// This class specifies a DNS domain and the list of DNS servers that support +/// it. Its primary use is to map a domain to the DNS server(s) responsible +/// for it. +/// @todo Currently the name entry for a domain is just a std::string. It +/// may be worthwhile to change this to a dns::Name for purposes of better +/// validation and matching capabilities. +class DdnsDomain : public isc::data::UserContext, public isc::data::CfgToElement { +public: + /// @brief Constructor + /// + /// @param name is the domain name of the domain. + /// @param servers is the list of server(s) supporting this domain. + /// @param key_name is the TSIG key name of the domain. + DdnsDomain(const std::string& name, DnsServerInfoStoragePtr servers, + const std::string& key_name = ""); + + /// @brief Destructor + virtual ~DdnsDomain(); + + /// @brief Getter which returns the domain's name. + /// + /// @return returns the name in a std::string. + const std::string getName() const { + return (name_); + } + + /// @brief Getter which returns the domain's TSIG key name. + /// + /// @note: TSIG key infos are in servers. + /// + /// @return returns the key name in a std::string. If domain has no + /// TSIG key, the string will be empty. + const std::string getKeyName() const { + return (key_name_); + } + + /// @brief Getter which returns the domain's list of servers. + /// + /// @return returns the pointer to the server storage. + const DnsServerInfoStoragePtr& getServers() { + return (servers_); + } + + /// @brief Unparse a configuration object + /// + /// @return a pointer to a configuration + virtual isc::data::ElementPtr toElement() const; + +private: + /// @brief The domain name of the domain. + std::string name_; + + /// @brief The list of server(s) supporting this domain. + DnsServerInfoStoragePtr servers_; + + /// @brief The TSIG key name (empty when there is no key for the domain). + std::string key_name_; +}; + +/// @brief Defines a pointer for DdnsDomain instances. +typedef boost::shared_ptr<DdnsDomain> DdnsDomainPtr; + +/// @brief Defines a map of DdnsDomains, keyed by the domain name. +typedef std::map<std::string, DdnsDomainPtr> DdnsDomainMap; + +/// @brief Defines a iterator pairing domain name and DdnsDomain +typedef std::pair<std::string, DdnsDomainPtr> DdnsDomainMapPair; + +/// @brief Defines a pointer to DdnsDomain storage containers. +typedef boost::shared_ptr<DdnsDomainMap> DdnsDomainMapPtr; + +/// @brief Provides storage for and management of a list of DNS domains. +/// In addition to housing the domain list storage, it provides domain matching +/// services. These services are used to match a FQDN to a domain. Currently +/// it supports a single matching service, which will return the matching +/// domain or a wild card domain if one is specified. The wild card domain is +/// specified as a domain whose name is "*". The wild card domain will match +/// any entry and is provided for flexibility in FQDNs If for instance, all +/// forward requests are handled by the same servers, the configuration could +/// specify the wild card domain as the only forward domain. All forward DNS +/// updates would be sent to that one list of servers, regardless of the FQDN. +/// As matching capabilities evolve this class is expected to expand. +class DdnsDomainListMgr : public isc::data::CfgToElement { +public: + /// @brief defines the domain name for denoting the wildcard domain. + static const char* wildcard_domain_name_; + + /// @brief Constructor + /// + /// @param name is an arbitrary label assigned to this manager. + DdnsDomainListMgr(const std::string& name); + + /// @brief Destructor + virtual ~DdnsDomainListMgr (); + + /// @brief Matches a given name to a domain based on a longest match + /// scheme. + /// + /// Given a FQDN, search the list of domains, successively removing a + /// sub-domain from the FQDN until a match is found. If no match is found + /// and the wild card domain is present in the list, then return it as the + /// match. If the wild card domain is the only domain in the list, then + /// it will be returned immediately for any FQDN. + /// + /// @param fqdn is the name for which to look. + /// @param domain receives the matching domain. If no match is found its + /// contents will be unchanged. + /// + /// @return returns true if a match is found, false otherwise. + /// @todo This is a very basic match method, which expects valid FQDNs + /// both as input and for the DdnsDomain::getName(). Currently both are + /// simple strings and there is no normalization (i.e. added trailing dots + /// if missing). + virtual bool matchDomain(const std::string& fqdn, DdnsDomainPtr& domain); + + /// @brief Fetches the manager's name. + /// + /// @return returns a std::string containing the name of the manager. + const std::string getName() const { + return (name_); + } + + /// @brief Returns the number of domains in the domain list. + /// + /// @brief returns an unsigned int containing the domain count. + uint32_t size() const { + return (domains_->size()); + } + + /// @brief Fetches the wild card domain. + /// + /// @return returns a pointer reference to the domain. The pointer will + /// empty if the wild card domain is not present. + const DdnsDomainPtr& getWildcardDomain() { + return (wildcard_domain_); + } + + /// @brief Fetches the domain list. + /// + /// @return returns a pointer reference to the list of domains. + const DdnsDomainMapPtr &getDomains() { + return (domains_); + } + + /// @brief Sets the manger's domain list to the given list of domains. + /// This method will scan the inbound list for the wild card domain and + /// set the internal wild card domain pointer accordingly. + void setDomains(DdnsDomainMapPtr domains); + + /// @brief Unparse a configuration object + /// + /// @return a pointer to a configuration + virtual isc::data::ElementPtr toElement() const; + +private: + /// @brief An arbitrary label assigned to this manager. + std::string name_; + + /// @brief Map of the domains, keyed by name. + DdnsDomainMapPtr domains_; + + /// @brief Pointer to the wild card domain. + DdnsDomainPtr wildcard_domain_; +}; + +/// @brief Defines a pointer for DdnsDomain instances. +typedef boost::shared_ptr<DdnsDomainListMgr> DdnsDomainListMgrPtr; + +/// @brief Storage container for scalar configuration parameters. +/// +/// This class is useful for implementing parsers for more complex configuration +/// elements (e.g. those of item type "map"). It provides a convenient way to +/// add storage to the parser for an arbitrary number and variety of scalar +/// configuration items (e.g. ints, bools, strings...) without explicitly adding +/// storage for each individual type needed by the parser. +/// +/// This class implements a concrete version of the base class by supplying a +/// "clone" method. +class DScalarContext : public process::ConfigBase { +public: + + /// @brief Constructor + DScalarContext() { + }; + + /// @brief Destructor + virtual ~DScalarContext() { + } + + /// @brief Creates a clone of a DStubContext. + /// + /// @return returns a pointer to the new clone. + virtual process::ConfigPtr clone() { + return (process::ConfigPtr(new DScalarContext(*this))); + } + + /// @brief Unparse a configuration object + /// + /// @return a pointer to a configuration + virtual isc::data::ElementPtr toElement() const { + isc_throw(isc::NotImplemented, "DScalarContext::ElementPtr"); + } + +protected: + /// @brief Copy constructor + DScalarContext(const DScalarContext& rhs) : ConfigBase(rhs) { + } + +private: + /// @brief Private assignment operator, not implemented. + DScalarContext& operator=(const DScalarContext& rhs); +}; + +/// @brief Defines a pointer for DScalarContext instances. +typedef boost::shared_ptr<DScalarContext> DScalarContextPtr; + +/// @brief Parser for TSIGKeyInfo +/// +/// This class parses the configuration element "tsig-key" +/// and creates an instance of a TSIGKeyInfo. +class TSIGKeyInfoParser : public data::SimpleParser { +public: + /// @brief Performs the actual parsing of the given "tsig-key" element. + /// + /// Parses a configuration for the elements needed to instantiate a + /// TSIGKeyInfo, validates those entries, creates a TSIGKeyInfo instance + /// + /// @param key_config is the "tsig-key" configuration to parse + /// + /// @return pointer to the new TSIGKeyInfo instance + TSIGKeyInfoPtr parse(data::ConstElementPtr key_config); + +}; + +/// @brief Parser for a list of TSIGKeyInfos +/// +/// This class parses a list of "tsig-key" configuration elements. +/// The TSIGKeyInfo instances are added to the given storage upon commit. +class TSIGKeyInfoListParser : public data::SimpleParser { +public: + /// @brief Performs the parsing of the given list "tsig-key" elements. + /// + /// Creates an empty TSIGKeyInfoMap + /// + /// Instantiates a TSIGKeyInfoParser + /// It iterates over each key entry in the list: + /// 2. Pass the element configuration to the parser's parse method + /// 3. Add the new TSIGKeyInfo instance to the key map + /// + /// @param key_list_config is the list of "tsig_key" elements to parse. + /// + /// @return a map containing the TSIGKeyInfo instances + TSIGKeyInfoMapPtr parse(data::ConstElementPtr key_list_config); +}; + +/// @brief Parser for DnsServerInfo +/// +/// This class parses the configuration element "dns-server" +/// and creates an instance of a DnsServerInfo. +class DnsServerInfoParser : public data::SimpleParser { +public: + /// @brief Performs the actual parsing of the given "dns-server" element. + /// + /// Parses a configuration for the elements needed to instantiate a + /// DnsServerInfo, validates those entries, creates a DnsServerInfo instance + /// and returns it. + /// + /// @param server_config is the "dns-server" configuration to parse + /// @param domain_config the parent domain's configuration + /// @param keys map of defined TSIG keys + /// + /// @return a pointer to the newly created server instance + /// + /// @throw D2CfgError if: + /// -# hostname is not blank, hostname is not yet supported + /// -# ip_address is invalid + /// -# port is 0 + DnsServerInfoPtr parse(data::ConstElementPtr server_config, + data::ConstElementPtr domain_config, + const TSIGKeyInfoMapPtr keys); +}; + +/// @brief Parser for a list of DnsServerInfos +/// +/// This class parses a list of "dns-server" configuration elements. +/// The DnsServerInfo instances are added +/// to the given storage upon commit. +class DnsServerInfoListParser : public data::SimpleParser { +public: + /// @brief Performs the actual parsing of the given list "dns-server" + /// elements. + /// + /// Creates an empty server list + /// It iterates over each server entry in the list: + /// 1. Creates a server instance by passing the entry to @c + /// DnsSeverInfoParser::parse() + /// 2. Adds the server to the server list + /// + /// @param server_list_config is the list of "dns-server" elements to parse. + /// @param domain_config the parent domain's configuration + /// @param keys map of defined TSIG keys + /// @return A pointer to the new, populated server list + DnsServerInfoStoragePtr parse(data::ConstElementPtr server_list_config, + data::ConstElementPtr domain_config, + const TSIGKeyInfoMapPtr keys); +}; + +/// @brief Parser for DdnsDomain +/// +/// This class parses the configuration element "ddns-domain" +/// and creates an instance of a DdnsDomain. +class DdnsDomainParser : public data::SimpleParser { +public: + /// @brief Performs the actual parsing of the given "ddns-domain" element. + /// + /// Parses a configuration for the elements needed to instantiate a + /// DdnsDomain, validates those entries, and creates a DdnsDomain instance. + /// + /// @param domain_config is the "ddns-domain" configuration to parse + /// @param keys map of defined TSIG keys + /// + /// @return a pointer to the new domain instance + DdnsDomainPtr parse(data::ConstElementPtr domain_config, + const TSIGKeyInfoMapPtr keys); +}; + +/// @brief Parser for a list of DdnsDomains +/// +/// This class parses a list of "ddns-domain" configuration elements +/// into a map of DdnsDomains. +class DdnsDomainListParser : public data::SimpleParser { +public: + /// @brief Performs the actual parsing of the given list "ddns-domain" + /// elements. + /// Creates a new DdnsDomain map + /// It iterates over each domain entry in the list: + /// 1. Creates a DdnsDomain instance by passing the entry into @c + /// DdnsDomainParser::parser() + /// 2. Adds the DdnsDomain instance to the domain map + /// + /// @param domain_list_config is the list of "ddns-domain" elements to + /// parse. + /// @param keys map of defined TSIG keys + /// @return a pointer to the newly populated domain map + DdnsDomainMapPtr parse(data::ConstElementPtr domain_list_config, + const TSIGKeyInfoMapPtr keys); +}; + +/// @brief Parser for DdnsDomainListMgr +/// +/// This class parses the configuration elements "forward-ddns" and +/// "reverse-ddns". It populates the given DdnsDomainListMgr with parsed +/// information. +class DdnsDomainListMgrParser : public data::SimpleParser { +public: + /// @brief Performs the actual parsing of the given manager element. + /// + /// Parses a configuration for the elements needed to instantiate a + /// DdnsDomainListMgr, validates those entries, then creates a + /// DdnsDomainListMgr. + /// + /// @param mgr_config manager configuration to parse + /// @param mgr_name convenience label for the manager instance + /// @param keys map of defined TSIG keys + /// + /// @return a pointer to the new manager instance + DdnsDomainListMgrPtr parse(data::ConstElementPtr mgr_config, + const std::string& mgr_name, + const TSIGKeyInfoMapPtr keys); +}; + +} // end of isc::d2 namespace +} // end of isc namespace + +#endif // D2_CONFIG_H |