[master] Merge branch 'master' of ssh://git.bind10.isc.org/var/bind10/git/bind10

ChangeLog

@@ -1,5 +1,14 @@
 bind10-1.0.0-beta released on December 20, 2012
 
+532.	[func]		marcin
+	Implemented configuration of DHCPv4 option values using
+	the configuration manager. In order to set values for the
+	data fields carried by a particular option, the user
+	specifies a string of hexadecimal digits that is converted
+	to binary data and stored in the option buffer. A more
+	user-friendly way of specifying option content is planned.
+	(Trac #2544, git fed1aab5a0f813c41637807f8c0c5f8830d71942)
+
 531.	[func]		tomek
 	b10-dhcp6: Added support for expired leases. Leases for IPv6
 	addresses that are past their valid lifetime may be recycled, i.e.

src/bin/dhcp4/Makefile.am

@@ -58,6 +58,7 @@ b10_dhcp4_CXXFLAGS = -Wno-unused-parameter
 endif
 
 b10_dhcp4_LDADD  = $(top_builddir)/src/lib/dhcp/libb10-dhcp++.la
+b10_dhcp4_LDADD += $(top_builddir)/src/lib/util/libb10-util.la
 b10_dhcp4_LDADD += $(top_builddir)/src/lib/dhcpsrv/libb10-dhcpsrv.la
 b10_dhcp4_LDADD += $(top_builddir)/src/lib/exceptions/libb10-exceptions.la
 b10_dhcp4_LDADD += $(top_builddir)/src/lib/asiolink/libb10-asiolink.la
@@ -65,6 +66,5 @@ b10_dhcp4_LDADD += $(top_builddir)/src/lib/log/libb10-log.la
 b10_dhcp4_LDADD += $(top_builddir)/src/lib/config/libb10-cfgclient.la
 b10_dhcp4_LDADD += $(top_builddir)/src/lib/cc/libb10-cc.la
 
-
 b10_dhcp4dir = $(pkgdatadir)
 b10_dhcp4_DATA = dhcp4.spec

src/bin/dhcp4/config_parser.cc

@@ -13,9 +13,12 @@
 // PERFORMANCE OF THIS SOFTWARE.
 
 #include <config/ccsession.h>
-#include <dhcpsrv/cfgmgr.h>
 #include <dhcp4/config_parser.h>
 #include <dhcp4/dhcp4_log.h>
+#include <dhcp/libdhcp++.h>
+#include <dhcp/option_definition.h>
+#include <dhcpsrv/cfgmgr.h>
+#include <util/encode/hex.h>
 #include <boost/foreach.hpp>
 #include <boost/lexical_cast.hpp>
 #include <boost/algorithm/string.hpp>
@@ -46,12 +49,20 @@ typedef std::map<std::string, ParserFactory*> FactoryMap;
 /// no subnet object created yet to store them.
 typedef std::vector<Pool4Ptr> PoolStorage;
 
+/// @brief Collection of option descriptors. This container allows searching for
+/// options using the option code or persistency flag. This is useful when merging
+/// existing options with newly configured options.
+typedef Subnet::OptionContainer OptionStorage;
+
 /// @brief Global uint32 parameters that will be used as defaults.
 Uint32Storage uint32_defaults;
 
 /// @brief global string parameters that will be used as defaults.
 StringStorage string_defaults;
 
+/// @brief Global storage for options that will be used as defaults.
+OptionStorage option_defaults;
+
 /// @brief a dummy configuration parser
 ///
 /// It is a debugging parser. It does not configure anything,
@@ -451,6 +462,344 @@ private:
     PoolStorage* pools_;
 };
 
+/// @brief Parser for option data value.
+///
+/// This parser parses configuration entries that specify value of
+/// a single option. These entries include option name, option code
+/// and data carried by the option. If parsing is successful then an
+/// instance of an option is created and added to the storage provided
+/// by the calling class.
+///
+/// @todo This class parses and validates the option name. However it is
+/// not used anywhere until support for option spaces is implemented
+/// (see tickets #2319, #2314). When option spaces are implemented
+/// there will be a way to reference the particular option using
+/// its type (code) or option name.
+class OptionDataParser : public Dhcp4ConfigParser {
+public:
+
+    /// @brief Constructor.
+    ///
+    /// Class constructor.
+    OptionDataParser(const std::string&)
+        : options_(NULL),
+          // initialize option to NULL ptr
+          option_descriptor_(false) { }
+
+    /// @brief Parses the single option data.
+    ///
+    /// This method parses the data of a single option from the configuration.
+    /// The option data includes option name, option code and data being
+    /// carried by this option. Eventually it creates the instance of the
+    /// option.
+    ///
+    /// @warning setStorage must be called with valid storage pointer prior
+    /// to calling this method.
+    ///
+    /// @param option_data_entries collection of entries that define value
+    /// for a particular option.
+    /// @throw Dhcp4ConfigError if invalid parameter specified in
+    /// the configuration.
+    /// @throw isc::InvalidOperation if failed to set storage prior to
+    /// calling build.
+    /// @throw isc::BadValue if option data storage is invalid.
+    virtual void build(ConstElementPtr option_data_entries) {
+        if (options_ == NULL) {
+            isc_throw(isc::InvalidOperation, "Parser logic error: storage must be set before "
+                      "parsing option data.");
+        }
+        BOOST_FOREACH(ConfigPair param, option_data_entries->mapValue()) {
+            ParserPtr parser;
+            if (param.first == "name") {
+                boost::shared_ptr<StringParser>
+                    name_parser(dynamic_cast<StringParser*>(StringParser::Factory(param.first)));
+                if (name_parser) {
+                    name_parser->setStorage(&string_values_);
+                    parser = name_parser;
+                }
+            } else if (param.first == "code") {
+                boost::shared_ptr<Uint32Parser>
+                    code_parser(dynamic_cast<Uint32Parser*>(Uint32Parser::Factory(param.first)));
+                if (code_parser) {
+                    code_parser->setStorage(&uint32_values_);
+                    parser = code_parser;
+                }
+            } else if (param.first == "data") {
+                boost::shared_ptr<StringParser>
+                    value_parser(dynamic_cast<StringParser*>(StringParser::Factory(param.first)));
+                if (value_parser) {
+                    value_parser->setStorage(&string_values_);
+                    parser = value_parser;
+                }
+            } else {
+                isc_throw(Dhcp4ConfigError,
+                          "Parser error: option-data parameter not supported: "
+                          << param.first);
+            }
+            parser->build(param.second);
+        }
+        // Try to create the option instance.
+        createOption();
+    }
+
+    /// @brief Commits option value.
+    ///
+    /// This function adds a new option to the storage or replaces an existing option
+    /// with the same code.
+    ///
+    /// @throw isc::InvalidOperation if failed to set pointer to storage or failed
+    /// to call build() prior to commit. If that happens data in the storage
+    /// remain un-modified.
+    virtual void commit() {
+        if (options_ == NULL) {
+            isc_throw(isc::InvalidOperation, "Parser logic error: storage must be set before "
+                      "commiting option data.");
+        } else  if (!option_descriptor_.option) {
+            // Before we can commit the new option should be configured. If it is not
+            // than somebody must have called commit() before build().
+            isc_throw(isc::InvalidOperation, "Parser logic error: no option has been configured and"
+                      " thus there is nothing to commit. Has build() been called?");
+        }
+        uint16_t opt_type = option_descriptor_.option->getType();
+        Subnet::OptionContainerTypeIndex& idx = options_->get<1>();
+        // Try to find options with the particular option code in the main
+        // storage. If found, remove these options because they will be
+        // replaced with new one.
+        Subnet::OptionContainerTypeRange range =
+            idx.equal_range(opt_type);
+        if (std::distance(range.first, range.second) > 0) {
+            idx.erase(range.first, range.second);
+        }
+        // Append new option to the main storage.
+        options_->push_back(option_descriptor_);
+    }
+
+    /// @brief Set storage for the parser.
+    ///
+    /// Sets storage for the parser. This storage points to the
+    /// vector of options and is used by multiple instances of
+    /// OptionDataParser. Each instance creates exactly one object
+    /// of dhcp::Option or derived type and appends it to this
+    /// storage.
+    ///
+    /// @param storage pointer to the options storage
+    void setStorage(OptionStorage* storage) {
+        options_ = storage;
+    }
+
+private:
+
+    /// @brief Create option instance.
+    ///
+    /// Creates an instance of an option and adds it to the provided
+    /// options storage. If the option data parsed by \ref build function
+    /// are invalid or insufficient this function emits an exception.
+    ///
+    /// @warning this function does not check if options_ storage pointer
+    /// is intitialized but this check is not needed here because it is done
+    /// in the \ref build function.
+    ///
+    /// @throw Dhcp4ConfigError if parameters provided in the configuration
+    /// are invalid.
+    void createOption() {
+        // Option code is held in the uint32_t storage but is supposed to
+        // be uint16_t value. We need to check that value in the configuration
+        // does not exceed range of uint16_t and is not zero.
+        uint32_t option_code = getUint32Param("code");
+        if (option_code == 0) {
+            isc_throw(Dhcp4ConfigError, "Parser error: value of 'code' must not"
+                      << " be equal to zero. Option code '0' is reserved in"
+                      << " DHCPv4.");
+        } else if (option_code > std::numeric_limits<uint16_t>::max()) {
+            isc_throw(Dhcp4ConfigError, "Parser error: value of 'code' must not"
+                      << " exceed " << std::numeric_limits<uint16_t>::max());
+        }
+        // Check that the option name has been specified, is non-empty and does not
+        // contain spaces.
+        // @todo possibly some more restrictions apply here?
+        std::string option_name = getStringParam("name");
+        if (option_name.empty()) {
+            isc_throw(Dhcp4ConfigError, "Parser error: option name must not be"
+                      << " empty");
+        } else if (option_name.find(" ") != std::string::npos) {
+            isc_throw(Dhcp4ConfigError, "Parser error: option name must not contain"
+                      << " spaces");
+        }
+
+        // Get option data from the configuration database ('data' field).
+        // Option data is specified by the user as case insensitive string
+        // of hexadecimal digits for each option.
+        std::string option_data = getStringParam("data");
+        // Transform string of hexadecimal digits into binary format.
+        std::vector<uint8_t> binary;
+        try {
+            util::encode::decodeHex(option_data, binary);
+        } catch (...) {
+            isc_throw(Dhcp4ConfigError, "Parser error: option data is not a valid"
+                      << " string of hexadecimal digits: " << option_data);
+        }
+        // Get all existing DHCPv4 option definitions. The one that matches
+        // our option will be picked and used to create it.
+        OptionDefContainer option_defs = LibDHCP::getOptionDefs(Option::V4);
+        // Get search index #1. It allows searching for options definitions
+        // using option type value.
+        const OptionDefContainerTypeIndex& idx = option_defs.get<1>();
+        // Get all option definitions matching option code we want to create.
+        const OptionDefContainerTypeRange& range = idx.equal_range(option_code);
+        size_t num_defs = std::distance(range.first, range.second);
+        OptionPtr option;
+        // Currently we do not allow duplicated definitions and if there are
+        // any duplicates we issue internal server error.
+        if (num_defs > 1) {
+            isc_throw(Dhcp4ConfigError, "Internal error: currently it is not"
+                      << " supported to initialize multiple option definitions"
+                      << " for the same option code. This will be supported once"
+                      << " there option spaces are implemented.");
+        } else if (num_defs == 0) {
+            // @todo We have a limited set of option definitions intiialized at the moment.
+            // In the future we want to initialize option definitions for all options.
+            // Consequently an error will be issued if an option definition does not exist
+            // for a particular option code. For now it is ok to create generic option
+            // if definition does not exist.
+            OptionPtr option(new Option(Option::V4, static_cast<uint16_t>(option_code),
+                                        binary));
+            // The created option is stored in option_descriptor_ class member until the
+            // commit stage when it is inserted into the main storage. If an option with the
+            // same code exists in main storage already the old option is replaced.
+            option_descriptor_.option = option;
+            option_descriptor_.persistent = false;
+        } else {
+            // We have exactly one option definition for the particular option code
+            // use it to create the option instance.
+            const OptionDefinitionPtr& def = *(range.first);
+            try {
+                OptionPtr option = def->optionFactory(Option::V4, option_code, binary);
+                Subnet::OptionDescriptor desc(option, false);
+                option_descriptor_.option = option;
+                option_descriptor_.persistent = false;
+            } catch (const isc::Exception& ex) {
+                isc_throw(Dhcp4ConfigError, "Parser error: option data does not match"
+                          << " option definition (code " << option_code << "): "
+                          << ex.what());
+            }
+        }
+    }
+
+    /// @brief Get a parameter from the strings storage.
+    ///
+    /// @param param_id parameter identifier.
+    /// @throw Dhcp4ConfigError if parameter has not been found.
+    std::string getStringParam(const std::string& param_id) const {
+        StringStorage::const_iterator param = string_values_.find(param_id);
+        if (param == string_values_.end()) {
+            isc_throw(Dhcp4ConfigError, "Parser error: option-data parameter"
+                      << " '" << param_id << "' not specified");
+        }
+        return (param->second);
+    }
+
+    /// @brief Get a parameter from the uint32 values storage.
+    ///
+    /// @param param_id parameter identifier.
+    /// @throw Dhcp4ConfigError if parameter has not been found.
+    uint32_t getUint32Param(const std::string& param_id) const {
+        Uint32Storage::const_iterator param = uint32_values_.find(param_id);
+        if (param == uint32_values_.end()) {
+            isc_throw(Dhcp4ConfigError, "Parser error: option-data parameter"
+                      << " '" << param_id << "' not specified");
+        }
+        return (param->second);
+    }
+
+    /// Storage for uint32 values (e.g. option code).
+    Uint32Storage uint32_values_;
+    /// Storage for string values (e.g. option name or data).
+    StringStorage string_values_;
+    /// Pointer to options storage. This storage is provided by
+    /// the calling class and is shared by all OptionDataParser objects.
+    OptionStorage* options_;
+    /// Option descriptor holds newly configured option.
+    Subnet::OptionDescriptor option_descriptor_;
+};
+
+/// @brief Parser for option data values within a subnet.
+///
+/// This parser iterates over all entries that define options
+/// data for a particular subnet and creates a collection of options.
+/// If parsing is successful, all these options are added to the Subnet
+/// object.
+class OptionDataListParser : public Dhcp4ConfigParser {
+public:
+
+    /// @brief Constructor.
+    ///
+    /// Unless otherwise specified, parsed options will be stored in
+    /// a global option container (option_default). That storage location
+    /// is overriden on a subnet basis.
+    OptionDataListParser(const std::string&)
+        : options_(&option_defaults), local_options_() { }
+
+    /// @brief Parses entries that define options' data for a subnet.
+    ///
+    /// This method iterates over all entries that define option data
+    /// for options within a single subnet and creates options' instances.
+    ///
+    /// @param option_data_list pointer to a list of options' data sets.
+    /// @throw Dhcp4ConfigError if option parsing failed.
+    void build(ConstElementPtr option_data_list) {
+        BOOST_FOREACH(ConstElementPtr option_value, option_data_list->listValue()) {
+            boost::shared_ptr<OptionDataParser> parser(new OptionDataParser("option-data"));
+            // options_ member will hold instances of all options thus
+            // each OptionDataParser takes it as a storage.
+            parser->setStorage(&local_options_);
+            // Build the instance of a single option.
+            parser->build(option_value);
+            // Store a parser as it will be used to commit.
+            parsers_.push_back(parser);
+        }
+    }
+
+    /// @brief Set storage for option instances.
+    ///
+    /// @param storage pointer to options storage.
+    void setStorage(OptionStorage* storage) {
+        options_ = storage;
+    }
+
+
+    /// @brief Commit all option values.
+    ///
+    /// This function invokes commit for all option values.
+    void commit() {
+        BOOST_FOREACH(ParserPtr parser, parsers_) {
+            parser->commit();
+        }
+        // Parsing was successful and we have all configured
+        // options in local storage. We can now replace old values
+        // with new values.
+        std::swap(local_options_, *options_);
+    }
+
+    /// @brief Create DhcpDataListParser object
+    ///
+    /// @param param_name param name.
+    ///
+    /// @return DhcpConfigParser object.
+    static Dhcp4ConfigParser* Factory(const std::string& param_name) {
+        return (new OptionDataListParser(param_name));
+    }
+
+    /// Intermediate option storage. This storage is used by
+    /// lower level parsers to add new options.  Values held
+    /// in this storage are assigned to main storage (options_)
+    /// if overall parsing was successful.
+    OptionStorage local_options_;
+    /// Pointer to options instances storage.
+    OptionStorage* options_;
+    /// Collection of parsers;
+    ParserCollection parsers_;
+};
+
 /// @brief this class parses a single subnet
 ///
 /// This class parses the whole subnet definition. It creates parsers
@@ -470,35 +819,31 @@ public:
     void build(ConstElementPtr subnet) {
 
         BOOST_FOREACH(ConfigPair param, subnet->mapValue()) {
-
             ParserPtr parser(createSubnet4ConfigParser(param.first));
-
-            // if this is an Uint32 parser, tell it to store the values
-            // in values_, rather than in global storage
-            boost::shared_ptr<Uint32Parser> uint_parser =
-                boost::dynamic_pointer_cast<Uint32Parser>(parser);
-            if (uint_parser) {
-                uint_parser->setStorage(&uint32_values_);
-            } else {
-
-                boost::shared_ptr<StringParser> string_parser =
-                    boost::dynamic_pointer_cast<StringParser>(parser);
-                if (string_parser) {
-                    string_parser->setStorage(&string_values_);
-                } else {
-
-                    boost::shared_ptr<PoolParser> pool_parser =
-                        boost::dynamic_pointer_cast<PoolParser>(parser);
-                    if (pool_parser) {
-                        pool_parser->setStorage(&pools_);
-                    }
-                }
+            // The actual type of the parser is unknown here. We have to discover
+            // the parser type here to invoke the corresponding setStorage function
+            // on it.  We discover parser type by trying to cast the parser to various
+            // parser types and checking which one was successful. For this one
+            // a setStorage and build methods are invoked.
+
+            // Try uint32 type parser.
+            if (!buildParser<Uint32Parser, Uint32Storage >(parser, uint32_values_,
+                                                          param.second) &&
+                // Try string type parser.
+                !buildParser<StringParser, StringStorage >(parser, string_values_,
+                                                           param.second) &&
+                // Try pool parser.
+                !buildParser<PoolParser, PoolStorage >(parser, pools_,
+                                                       param.second) &&
+                // Try option data parser.
+                !buildParser<OptionDataListParser, OptionStorage >(parser, options_,
+                                                                   param.second)) {
+                // Appropriate parsers are created in the createSubnet6ConfigParser
+                // and they should be limited to those that we check here for. Thus,
+                // if we fail to find a matching parser here it is a programming error.
+                isc_throw(Dhcp4ConfigError, "failed to find suitable parser");
             }
-
-            parser->build(param.second);
-            parsers_.push_back(parser);
         }
-
         // Ok, we now have subnet parsed
     }
 
@@ -510,6 +855,10 @@ public:
     /// objects. Subnet4 are then added to DHCP CfgMgr.
     /// @throw Dhcp4ConfigError if there are any issues encountered during commit
     void commit() {
+        // Invoke commit on all sub-data parsers.
+        BOOST_FOREACH(ParserPtr parser, parsers_) {
+            parser->commit();
+        }
 
         StringStorage::const_iterator it = string_values_.find("subnet");
         if (it == string_values_.end()) {
@@ -545,11 +894,79 @@ public:
             subnet->addPool4(*it);
         }
 
+        const Subnet::OptionContainer& options = subnet->getOptions();
+        const Subnet::OptionContainerTypeIndex& idx = options.get<1>();
+
+        // Add subnet specific options.
+        BOOST_FOREACH(Subnet::OptionDescriptor desc, options_) {
+            Subnet::OptionContainerTypeRange range = idx.equal_range(desc.option->getType());
+            if (std::distance(range.first, range.second) > 0) {
+                LOG_WARN(dhcp4_logger, DHCP4_CONFIG_OPTION_DUPLICATE)
+                    .arg(desc.option->getType()).arg(addr.toText());
+            }
+            subnet->addOption(desc.option);
+        }
+
+        // Check all global options and add them to the subnet object if
+        // they have been configured in the global scope. If they have been
+        // configured in the subnet scope we don't add global option because
+        // the one configured in the subnet scope always takes precedence.
+        BOOST_FOREACH(Subnet::OptionDescriptor desc, option_defaults) {
+            // Get all options specified locally in the subnet and having
+            // code equal to global option's code.
+            Subnet::OptionContainerTypeRange range = idx.equal_range(desc.option->getType());
+            // @todo: In the future we will be searching for options using either
+            // an option code or namespace. Currently we have only the option
+            // code available so if there is at least one option found with the
+            // specific code we don't add the globally configured option.
+            // @todo with this code the first globally configured option
+            // with the given code will be added to a subnet. We may
+            // want to issue a warning about dropping the configuration of
+            // a global option if one already exsists.
+            if (std::distance(range.first, range.second) == 0) {
+                subnet->addOption(desc.option);
+            }
+        }
+
         CfgMgr::instance().addSubnet4(subnet);
     }
 
 private:
 
+    /// @brief Set storage for a parser and invoke build.
+    ///
+    /// This helper method casts the provided parser pointer to the specified
+    /// type. If the cast is successful it sets the corresponding storage for
+    /// this parser, invokes build on it and saves the parser.
+    ///
+    /// @tparam T parser type to which parser argument should be cast.
+    /// @tparam Y storage type for the specified parser type.
+    /// @param parser parser on which build must be invoked.
+    /// @param storage reference to a storage that will be set for a parser.
+    /// @param subnet subnet element read from the configuration and being parsed.
+    /// @return true if parser pointer was successfully cast to specialized
+    /// parser type provided as Y.
+    template<typename T, typename Y>
+    bool buildParser(const ParserPtr& parser, Y& storage, const ConstElementPtr& subnet) {
+        // We need to cast to T in order to set storage for the parser.
+        boost::shared_ptr<T> cast_parser = boost::dynamic_pointer_cast<T>(parser);
+        // It is common that this cast is not successful because we try to cast to all
+        // supported parser types as we don't know the type of a parser in advance.
+        if (cast_parser) {
+            // Cast, successful so we go ahead with setting storage and actual parse.
+            cast_parser->setStorage(&storage);
+            parser->build(subnet);
+            parsers_.push_back(parser);
+            // We indicate that cast was successful so as the calling function
+            // may skip attempts to cast to other parser types and proceed to
+            // next element.
+            return (true);
+        }
+        // It was not successful. Indicate that another parser type
+        // should be tried.
+        return (false);
+    }
+
     /// @brief creates parsers for entries in subnet definition
     ///
     /// @todo Add subnet-specific things here (e.g. subnet-specific options)
@@ -565,6 +982,7 @@ private:
         factories["rebind-timer"] = Uint32Parser::Factory;
         factories["subnet"] = StringParser::Factory;
         factories["pool"] = PoolParser::Factory;
+        factories["option-data"] = OptionDataListParser::Factory;
 
         FactoryMap::iterator f = factories.find(config_id);
         if (f == factories.end()) {
@@ -620,6 +1038,9 @@ private:
     /// storage for pools belonging to this subnet
     PoolStorage pools_;
 
+    /// storage for options belonging to this subnet
+    OptionStorage options_;
+
     /// parsers are stored here
     ParserCollection parsers_;
 };
@@ -650,7 +1071,6 @@ public:
         // used: Subnet4ConfigParser
 
         BOOST_FOREACH(ConstElementPtr subnet, subnets_list->listValue()) {
-
             ParserPtr parser(new Subnet4ConfigParser("subnet"));
             parser->build(subnet);
             subnets_.push_back(parser);
@@ -702,6 +1122,7 @@ Dhcp4ConfigParser* createGlobalDhcp4ConfigParser(const std::string& config_id) {
     factories["rebind-timer"] = Uint32Parser::Factory;
     factories["interface"] = InterfaceListConfigParser::Factory;
     factories["subnet4"] = Subnets4ListConfigParser::Factory;
+    factories["option-data"] = OptionDataListParser::Factory;
     factories["version"] = StringParser::Factory;
 
     FactoryMap::iterator f = factories.find(config_id);
@@ -739,7 +1160,7 @@ configureDhcp4Server(Dhcpv4Srv& , ConstElementPtr config_set) {
         }
     } catch (const isc::Exception& ex) {
         ConstElementPtr answer = isc::config::createAnswer(1,
-                                 string("Configuration parsing failed:") + ex.what());
+                                 string("Configuration parsing failed: ") + ex.what());
         return (answer);
     } catch (...) {
         // for things like bad_cast in boost::lexical_cast
@@ -754,7 +1175,7 @@ configureDhcp4Server(Dhcpv4Srv& , ConstElementPtr config_set) {
     }
     catch (const isc::Exception& ex) {
         ConstElementPtr answer = isc::config::createAnswer(2,
-                                 string("Configuration commit failed:") + ex.what());
+                                 string("Configuration commit failed: ") + ex.what());
         return (answer);
     } catch (...) {
         // for things like bad_cast in boost::lexical_cast

src/bin/dhcp4/config_parser.h

@@ -14,6 +14,7 @@
 
 #include <exceptions/exceptions.h>
 #include <cc/data.h>
+#include <stdint.h>
 #include <string>
 
 #ifndef DHCP4_CONFIG_PARSER_H

src/bin/dhcp4/dhcp4.spec

@@ -34,6 +34,37 @@
         "item_default": 4000
       },
 
+      { "item_name": "option-data",
+        "item_type": "list",
+        "item_optional": false,
+        "item_default": [],
+        "list_item_spec":
+        {
+          "item_name": "single-option-data",
+          "item_type": "map",
+          "item_optional": false,
+          "item_default": {},
+          "map_item_spec": [
+          {
+            "item_name": "name",
+            "item_type": "string",
+            "item_optional": false,
+            "item_default": ""
+          },
+
+          { "item_name": "code",
+            "item_type": "integer",
+            "item_optional": false,
+            "item_default": 0
+          },
+          { "item_name": "data",
+            "item_type": "string",
+            "item_optional": false,
+            "item_default": ""
+          } ]
+        }
+      },
+
       { "item_name": "subnet4",
         "item_type": "list",
         "item_optional": false,
@@ -80,9 +111,40 @@
                         "item_optional": false,
                         "item_default": ""
                     }
-                }
-            ]
-        }
+                },
+
+                { "item_name": "option-data",
+                  "item_type": "list",
+                  "item_optional": false,
+                  "item_default": [],
+                  "list_item_spec":
+                  {
+                    "item_name": "single-option-data",
+                    "item_type": "map",
+                    "item_optional": false,
+                    "item_default": {},
+                    "map_item_spec": [
+                    {
+                      "item_name": "name",
+                      "item_type": "string",
+                      "item_optional": false,
+                      "item_default": ""
+                    },
+                    {
+                      "item_name": "code",
+                      "item_type": "integer",
+                      "item_optional": false,
+                      "item_default": 0
+                    },
+                    {
+                      "item_name": "data",
+                      "item_type": "string",
+                      "item_optional": false,
+                      "item_default": ""
+                    } ]
+                  }
+                } ]
+         }
       }
     ],
     "commands": [

src/bin/dhcp4/dhcp4_messages.mes

@@ -50,6 +50,11 @@ change is committed by the administrator.
 A debug message indicating that the IPv4 DHCP server has received an
 updated configuration from the BIND 10 configuration system.
 
+% DHCP4_CONFIG_OPTION_DUPLICATE multiple options with the code: %1 added to the subnet: %2
+This warning message is issued on an attempt to configure multiple options with the
+same option code for the particular subnet. Adding multiple options is uncommon
+for DHCPv4, but it is not prohibited.
+
 % DHCP4_NOT_RUNNING IPv4 DHCP server is not running
 A warning message is issued when an attempt is made to shut down the
 IPv4 DHCP server but it is not running.

src/bin/dhcp4/tests/Makefile.am

@@ -66,13 +66,13 @@ dhcp4_unittests_CPPFLAGS = $(AM_CPPFLAGS) $(GTEST_INCLUDES)
 dhcp4_unittests_LDFLAGS = $(AM_LDFLAGS) $(GTEST_LDFLAGS)
 dhcp4_unittests_LDADD = $(GTEST_LDADD)
 dhcp4_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libb10-asiolink.la
+dhcp4_unittests_LDADD += $(top_builddir)/src/lib/cc/libb10-cc.la
+dhcp4_unittests_LDADD += $(top_builddir)/src/lib/config/libb10-cfgclient.la
 dhcp4_unittests_LDADD += $(top_builddir)/src/lib/dhcp/libb10-dhcp++.la
 dhcp4_unittests_LDADD += $(top_builddir)/src/lib/dhcpsrv/libb10-dhcpsrv.la
 dhcp4_unittests_LDADD += $(top_builddir)/src/lib/exceptions/libb10-exceptions.la
 dhcp4_unittests_LDADD += $(top_builddir)/src/lib/log/libb10-log.la
-dhcp4_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libb10-asiolink.la
-dhcp4_unittests_LDADD += $(top_builddir)/src/lib/config/libb10-cfgclient.la
-dhcp4_unittests_LDADD += $(top_builddir)/src/lib/cc/libb10-cc.la
+dhcp4_unittests_LDADD += $(top_builddir)/src/lib/util/libb10-util.la
 endif
 
 noinst_PROGRAMS = $(TESTS)

src/bin/dhcp4/tests/config_parser_unittest.cc

@@ -22,6 +22,7 @@
 #include <config/ccsession.h>
 #include <dhcpsrv/subnet.h>
 #include <dhcpsrv/cfgmgr.h>
+#include <boost/foreach.hpp>
 #include <iostream>
 #include <fstream>
 #include <sstream>
@@ -73,9 +74,188 @@ public:
     }
 
     ~Dhcp4ParserTest() {
+        resetConfiguration();
         delete srv_;
     };
 
+    /// @brief Create the simple configuration with single option.
+    ///
+    /// This function allows to set one of the parameters that configure
+    /// option value. These parameters are: "name", "code" and "data".
+    ///
+    /// @param param_value string holiding option parameter value to be
+    /// injected into the configuration string.
+    /// @param parameter name of the parameter to be configured with
+    /// param value.
+    /// @return configuration string containing custom values of parameters
+    /// describing an option.
+    std::string createConfigWithOption(const std::string& param_value,
+                                       const std::string& parameter) {
+        std::map<std::string, std::string> params;
+        if (parameter == "name") {
+            params["name"] = param_value;
+            params["code"] = "56";
+            params["data"] = "AB CDEF0105";
+        } else if (parameter == "code") {
+            params["name"] = "option_foo";
+            params["code"] = param_value;
+            params["data"] = "AB CDEF0105";
+        } else if (parameter == "data") {
+            params["name"] = "option_foo";
+            params["code"] = "56";
+            params["data"] = param_value;
+        }
+        return (createConfigWithOption(params));
+    }
+
+    /// @brief Create simple configuration with single option.
+    ///
+    /// This function creates a configuration for a single option with
+    /// custom values for all parameters that describe the option.
+    ///
+    /// @params params map holding parameters and their values.
+    /// @return configuration string containing custom values of parameters
+    /// describing an option.
+    std::string createConfigWithOption(const std::map<std::string, std::string>& params) {
+        std::ostringstream stream;
+        stream << "{ \"interface\": [ \"all\" ],"
+            "\"rebind-timer\": 2000, "
+            "\"renew-timer\": 1000, "
+            "\"subnet4\": [ { "
+            "    \"pool\": [ \"192.0.2.1 - 192.0.2.100\" ],"
+            "    \"subnet\": \"192.0.2.0/24\", "
+            "    \"option-data\": [ {";
+        bool first = true;
+        typedef std::pair<std::string, std::string> ParamPair;
+        BOOST_FOREACH(ParamPair param, params) {
+            if (!first) {
+                stream << ", ";
+            } else {
+                // cppcheck-suppress unreadVariable
+                first = false;
+            }
+            if (param.first == "name") {
+                stream << "\"name\": \"" << param.second << "\"";
+            } else if (param.first == "code") {
+                stream << "\"code\": " << param.second << "";
+            } else if (param.first == "data") {
+                stream << "\"data\": \"" << param.second << "\"";
+            }
+        }
+        stream <<
+            "        } ]"
+            " } ],"
+            "\"valid-lifetime\": 4000 }";
+        return (stream.str());
+    }
+
+    /// @brief Test invalid option parameter value.
+    ///
+    /// This test function constructs the simple configuration
+    /// string and injects invalid option configuration into it.
+    /// It expects that parser will fail with provided option code.
+    ///
+    /// @param param_value string holding invalid option parameter value
+    /// to be injected into configuration string.
+    /// @param parameter name of the parameter to be configured with
+    /// param_value (can be any of "name", "code", "data")
+    void testInvalidOptionParam(const std::string& param_value,
+                                const std::string& parameter) {
+        ConstElementPtr x;
+        std::string config = createConfigWithOption(param_value, parameter);
+        ElementPtr json = Element::fromJSON(config);
+        EXPECT_NO_THROW(x = configureDhcp4Server(*srv_, json));
+        ASSERT_TRUE(x);
+        comment_ = parseAnswer(rcode_, x);
+        ASSERT_EQ(1, rcode_);
+    }
+
+    /// @brief Test option against given code and data.
+    ///
+    /// @param option_desc option descriptor that carries the option to
+    /// be tested.
+    /// @param expected_code expected code of the option.
+    /// @param expected_data expected data in the option.
+    /// @param expected_data_len length of the reference data.
+    /// @param extra_data if true extra data is allowed in an option
+    /// after tested data.
+    void testOption(const Subnet::OptionDescriptor& option_desc,
+                    uint16_t expected_code, const uint8_t* expected_data,
+                    size_t expected_data_len,
+                    bool extra_data = false) {
+        // Check if option descriptor contains valid option pointer.
+        ASSERT_TRUE(option_desc.option);
+        // Verify option type.
+        EXPECT_EQ(expected_code, option_desc.option->getType());
+        // We may have many different option types being created. Some of them
+        // have dedicated classes derived from Option class. In such case if
+        // we want to verify the option contents against expected_data we have
+        // to prepare raw buffer with the contents of the option. The easiest
+        // way is to call pack() which will prepare on-wire data.
+        util::OutputBuffer buf(option_desc.option->getData().size());
+        option_desc.option->pack(buf);
+        if (extra_data) {
+            // The length of the buffer must be at least equal to size of the
+            // reference data but it can sometimes be greater than that. This is
+            // because some options carry suboptions that increase the overall
+            // length.
+            ASSERT_GE(buf.getLength() - option_desc.option->getHeaderLen(),
+                      expected_data_len);
+        } else {
+            ASSERT_EQ(buf.getLength() - option_desc.option->getHeaderLen(),
+                      expected_data_len);
+        }
+        // Verify that the data is correct. Do not verify suboptions and a header.
+        const uint8_t* data = static_cast<const uint8_t*>(buf.getData());
+        EXPECT_EQ(0, memcmp(expected_data, data + option_desc.option->getHeaderLen(),
+                            expected_data_len));
+    }
+
+    /// @brief Reset configuration database.
+    ///
+    /// This function resets configuration data base by
+    /// removing all subnets and option-data. Reset must
+    /// be performed after each test to make sure that
+    /// contents of the database do not affect result of
+    /// subsequent tests.
+    void resetConfiguration() {
+        ConstElementPtr status;
+
+        string config = "{ \"interface\": [ \"all\" ],"
+            "\"rebind-timer\": 2000, "
+            "\"renew-timer\": 1000, "
+            "\"valid-lifetime\": 4000, "
+            "\"subnet4\": [ ], "
+            "\"option-data\": [ ] }";
+
+        try {
+            ElementPtr json = Element::fromJSON(config);
+            status = configureDhcp4Server(*srv_, json);
+        } catch (const std::exception& ex) {
+            FAIL() << "Fatal error: unable to reset configuration database"
+                   << " after the test. The following configuration was used"
+                   << " to reset database: " << std::endl
+                   << config << std::endl
+                   << " and the following error message was returned:"
+                   << ex.what() << std::endl;
+        }
+
+        // status object must not be NULL
+        if (!status) {
+            FAIL() << "Fatal error: unable to reset configuration database"
+                   << " after the test. Configuration function returned"
+                   << " NULL pointer" << std::endl;
+        }
+
+        comment_ = parseAnswer(rcode_, status);
+        // returned value should be 0 (configuration success)
+        if (rcode_ != 0) {
+            FAIL() << "Fatal error: unable to reset configuration database"
+                   << " after the test. Configuration function returned"
+                   << " error code " << rcode_ << std::endl;
+        }
+    }
+
     Dhcpv4Srv* srv_;
 
     int rcode_;
@@ -248,6 +428,302 @@ TEST_F(Dhcp4ParserTest, poolPrefixLen) {
     EXPECT_EQ(4000, subnet->getValid());
 }
 
+// Goal of this test is to verify that global option
+// data is configured for the subnet if the subnet
+// configuration does not include options configuration.
+TEST_F(Dhcp4ParserTest, optionDataDefaults) {
+    ConstElementPtr x;
+    string config = "{ \"interface\": [ \"all\" ],"
+        "\"rebind-timer\": 2000,"
+        "\"renew-timer\": 1000,"
+        "\"option-data\": [ {"
+        "    \"name\": \"option_foo\","
+        "    \"code\": 56,"
+        "    \"data\": \"AB CDEF0105\""
+        " },"
+        " {"
+        "    \"name\": \"option_foo2\","
+        "    \"code\": 23,"
+        "    \"data\": \"01\""
+        " } ],"
+        "\"subnet4\": [ { "
+        "    \"pool\": [ \"192.0.2.1 - 192.0.2.100\" ],"
+        "    \"subnet\": \"192.0.2.0/24\""
+        " } ],"
+        "\"valid-lifetime\": 4000 }";
+
+    ElementPtr json = Element::fromJSON(config);
+
+    EXPECT_NO_THROW(x = configureDhcp4Server(*srv_, json));
+    ASSERT_TRUE(x);
+    comment_ = parseAnswer(rcode_, x);
+    ASSERT_EQ(0, rcode_);
+
+    Subnet4Ptr subnet = CfgMgr::instance().getSubnet4(IOAddress("192.0.2.200"));
+    ASSERT_TRUE(subnet);
+    const Subnet::OptionContainer& options = subnet->getOptions();
+    ASSERT_EQ(2, options.size());
+
+    // Get the search index. Index #1 is to search using option code.
+    const Subnet::OptionContainerTypeIndex& idx = options.get<1>();
+
+    // Get the options for specified index. Expecting one option to be
+    // returned but in theory we may have multiple options with the same
+    // code so we get the range.
+    std::pair<Subnet::OptionContainerTypeIndex::const_iterator,
+              Subnet::OptionContainerTypeIndex::const_iterator> range =
+        idx.equal_range(56);
+    // Expect single option with the code equal to 56.
+    ASSERT_EQ(1, std::distance(range.first, range.second));
+    const uint8_t foo_expected[] = {
+        0xAB, 0xCD, 0xEF, 0x01, 0x05
+    };
+    // Check if option is valid in terms of code and carried data.
+    testOption(*range.first, 56, foo_expected, sizeof(foo_expected));
+
+    range = idx.equal_range(23);
+    ASSERT_EQ(1, std::distance(range.first, range.second));
+    // Do another round of testing with second option.
+    const uint8_t foo2_expected[] = {
+        0x01
+    };
+    testOption(*range.first, 23, foo2_expected, sizeof(foo2_expected));
+}
+
+// Goal of this test is to verify options configuration
+// for a single subnet. In particular this test checks
+// that local options configuration overrides global
+// option setting.
+TEST_F(Dhcp4ParserTest, optionDataInSingleSubnet) {
+    ConstElementPtr x;
+    string config = "{ \"interface\": [ \"all\" ],"
+        "\"rebind-timer\": 2000, "
+        "\"renew-timer\": 1000, "
+        "\"option-data\": [ {"
+        "      \"name\": \"option_foo\","
+        "      \"code\": 56,"
+        "      \"data\": \"AB\""
+        " } ],"
+        "\"subnet4\": [ { "
+        "    \"pool\": [ \"192.0.2.1 - 192.0.2.100\" ],"
+        "    \"subnet\": \"192.0.2.0/24\", "
+        "    \"option-data\": [ {"
+        "          \"name\": \"option_foo\","
+        "          \"code\": 56,"
+        "          \"data\": \"AB CDEF0105\""
+        "        },"
+        "        {"
+        "          \"name\": \"option_foo2\","
+        "          \"code\": 23,"
+        "          \"data\": \"01\""
+        "        } ]"
+        " } ],"
+        "\"valid-lifetime\": 4000 }";
+
+    ElementPtr json = Element::fromJSON(config);
+
+    EXPECT_NO_THROW(x = configureDhcp4Server(*srv_, json));
+    ASSERT_TRUE(x);
+    comment_ = parseAnswer(rcode_, x);
+    ASSERT_EQ(0, rcode_);
+
+    Subnet4Ptr subnet = CfgMgr::instance().getSubnet4(IOAddress("192.0.2.24"));
+    ASSERT_TRUE(subnet);
+    const Subnet::OptionContainer& options = subnet->getOptions();
+    ASSERT_EQ(2, options.size());
+
+    // Get the search index. Index #1 is to search using option code.
+    const Subnet::OptionContainerTypeIndex& idx = options.get<1>();
+
+    // Get the options for specified index. Expecting one option to be
+    // returned but in theory we may have multiple options with the same
+    // code so we get the range.
+    std::pair<Subnet::OptionContainerTypeIndex::const_iterator,
+              Subnet::OptionContainerTypeIndex::const_iterator> range =
+        idx.equal_range(56);
+    // Expect single option with the code equal to 100.
+    ASSERT_EQ(1, std::distance(range.first, range.second));
+    const uint8_t foo_expected[] = {
+        0xAB, 0xCD, 0xEF, 0x01, 0x05
+    };
+    // Check if option is valid in terms of code and carried data.
+    testOption(*range.first, 56, foo_expected, sizeof(foo_expected));
+
+    range = idx.equal_range(23);
+    ASSERT_EQ(1, std::distance(range.first, range.second));
+    // Do another round of testing with second option.
+    const uint8_t foo2_expected[] = {
+        0x01
+    };
+    testOption(*range.first, 23, foo2_expected, sizeof(foo2_expected));
+}
+
+// Goal of this test is to verify options configuration
+// for multiple subnets.
+TEST_F(Dhcp4ParserTest, optionDataInMultipleSubnets) {
+    ConstElementPtr x;
+    string config = "{ \"interface\": [ \"all\" ],"
+        "\"rebind-timer\": 2000, "
+        "\"renew-timer\": 1000, "
+        "\"subnet4\": [ { "
+        "    \"pool\": [ \"192.0.2.1 - 192.0.2.100\" ],"
+        "    \"subnet\": \"192.0.2.0/24\", "
+        "    \"option-data\": [ {"
+        "          \"name\": \"option_foo\","
+        "          \"code\": 56,"
+        "          \"data\": \"0102030405060708090A\""
+        "        } ]"
+        " },"
+        " {"
+        "    \"pool\": [ \"192.0.3.101 - 192.0.3.150\" ],"
+        "    \"subnet\": \"192.0.3.0/24\", "
+        "    \"option-data\": [ {"
+        "          \"name\": \"option_foo2\","
+        "          \"code\": 23,"
+        "          \"data\": \"FF\""
+        "        } ]"
+        " } ],"
+        "\"valid-lifetime\": 4000 }";
+
+    ElementPtr json = Element::fromJSON(config);
+
+    EXPECT_NO_THROW(x = configureDhcp4Server(*srv_, json));
+    ASSERT_TRUE(x);
+    comment_ = parseAnswer(rcode_, x);
+    ASSERT_EQ(0, rcode_);
+
+    Subnet4Ptr subnet1 = CfgMgr::instance().getSubnet4(IOAddress("192.0.2.100"));
+    ASSERT_TRUE(subnet1);
+    const Subnet::OptionContainer& options1 = subnet1->getOptions();
+    ASSERT_EQ(1, options1.size());
+
+    // Get the search index. Index #1 is to search using option code.
+    const Subnet::OptionContainerTypeIndex& idx1 = options1.get<1>();
+
+    // Get the options for specified index. Expecting one option to be
+    // returned but in theory we may have multiple options with the same
+    // code so we get the range.
+    std::pair<Subnet::OptionContainerTypeIndex::const_iterator,
+              Subnet::OptionContainerTypeIndex::const_iterator> range1 =
+        idx1.equal_range(56);
+    // Expect single option with the code equal to 56.
+    ASSERT_EQ(1, std::distance(range1.first, range1.second));
+    const uint8_t foo_expected[] = {
+        0x01, 0x02, 0x03, 0x04, 0x05,
+        0x06, 0x07, 0x08, 0x09, 0x0A
+    };
+    // Check if option is valid in terms of code and carried data.
+    testOption(*range1.first, 56, foo_expected, sizeof(foo_expected));
+
+    // Test another subnet in the same way.
+    Subnet4Ptr subnet2 = CfgMgr::instance().getSubnet4(IOAddress("192.0.3.102"));
+    ASSERT_TRUE(subnet2);
+    const Subnet::OptionContainer& options2 = subnet2->getOptions();
+    ASSERT_EQ(1, options2.size());
+
+    const Subnet::OptionContainerTypeIndex& idx2 = options2.get<1>();
+    std::pair<Subnet::OptionContainerTypeIndex::const_iterator,
+              Subnet::OptionContainerTypeIndex::const_iterator> range2 =
+        idx2.equal_range(23);
+    ASSERT_EQ(1, std::distance(range2.first, range2.second));
+
+    const uint8_t foo2_expected[] = { 0xFF };
+    testOption(*range2.first, 23, foo2_expected, sizeof(foo2_expected));
+}
+
+// Verify that empty option name is rejected in the configuration.
+TEST_F(Dhcp4ParserTest, optionNameEmpty) {
+    // Empty option names not allowed.
+    testInvalidOptionParam("", "name");
+}
+
+// Verify that empty option name with spaces is rejected
+// in the configuration.
+TEST_F(Dhcp4ParserTest, optionNameSpaces) {
+    // Spaces in option names not allowed.
+    testInvalidOptionParam("option foo", "name");
+}
+
+// Verify that negative option code is rejected in the configuration.
+TEST_F(Dhcp4ParserTest, optionCodeNegative) {
+    // Check negative option code -4. This should fail too.
+    testInvalidOptionParam("-4", "code");
+}
+
+// Verify that out of bounds option code is rejected in the configuration.
+TEST_F(Dhcp4ParserTest, optionCodeNonUint8) {
+    // The valid option codes are uint16_t values so passing
+    // uint16_t maximum value incremented by 1 should result
+    // in failure.
+    testInvalidOptionParam("257", "code");
+}
+
+// Verify that zero option code is rejected in the configuration.
+TEST_F(Dhcp4ParserTest, optionCodeZero) {
+    // Option code 0 is reserved and should not be accepted
+    // by configuration parser.
+    testInvalidOptionParam("0", "code");
+}
+
+// Verify that option data which contains non hexadecimal characters
+// is rejected by the configuration.
+TEST_F(Dhcp4ParserTest, optionDataInvalidChar) {
+    // Option code 0 is reserved and should not be accepted
+    // by configuration parser.
+    testInvalidOptionParam("01020R", "data");
+}
+
+// Verify that option data containins '0x' prefix is rejected
+// by the configuration.
+TEST_F(Dhcp4ParserTest, optionDataUnexpectedPrefix) {
+    // Option code 0 is reserved and should not be accepted
+    // by configuration parser.
+    testInvalidOptionParam("0x0102", "data");
+}
+
+// Verify that option data consisting od an odd number of
+// hexadecimal digits is rejected in the configuration.
+TEST_F(Dhcp4ParserTest, optionDataOddLength) {
+    // Option code 0 is reserved and should not be accepted
+    // by configuration parser.
+    testInvalidOptionParam("123", "data");
+}
+
+// Verify that either lower or upper case characters are allowed
+// to specify the option data.
+TEST_F(Dhcp4ParserTest, optionDataLowerCase) {
+    ConstElementPtr x;
+    std::string config = createConfigWithOption("0a0b0C0D", "data");
+    ElementPtr json = Element::fromJSON(config);
+
+    EXPECT_NO_THROW(x = configureDhcp4Server(*srv_, json));
+    ASSERT_TRUE(x);
+    comment_ = parseAnswer(rcode_, x);
+    ASSERT_EQ(0, rcode_);
+
+    Subnet4Ptr subnet = CfgMgr::instance().getSubnet4(IOAddress("192.0.2.5"));
+    ASSERT_TRUE(subnet);
+    const Subnet::OptionContainer& options = subnet->getOptions();
+    ASSERT_EQ(1, options.size());
+
+    // Get the search index. Index #1 is to search using option code.
+    const Subnet::OptionContainerTypeIndex& idx = options.get<1>();
+
+    // Get the options for specified index. Expecting one option to be
+    // returned but in theory we may have multiple options with the same
+    // code so we get the range.
+    std::pair<Subnet::OptionContainerTypeIndex::const_iterator,
+              Subnet::OptionContainerTypeIndex::const_iterator> range =
+        idx.equal_range(56);
+    // Expect single option with the code equal to 100.
+    ASSERT_EQ(1, std::distance(range.first, range.second));
+    const uint8_t foo_expected[] = {
+        0x0A, 0x0B, 0x0C, 0x0D
+    };
+    // Check if option is valid in terms of code and carried data.
+    testOption(*range.first, 56, foo_expected, sizeof(foo_expected));
+}
+
 /// This test checks if Uint32Parser can really parse the whole range
 /// and properly err of out of range values. As we can't call Uint32Parser
 /// directly, we are exploiting the fact that it is used to parse global

src/bin/dhcp6/Makefile.am

@@ -59,14 +59,14 @@ if USE_CLANGPP
 b10_dhcp6_CXXFLAGS = -Wno-unused-parameter
 endif
 
-b10_dhcp6_LDADD  = $(top_builddir)/src/lib/exceptions/libb10-exceptions.la
-b10_dhcp6_LDADD += $(top_builddir)/src/lib/util/libb10-util.la
-b10_dhcp6_LDADD += $(top_builddir)/src/lib/asiolink/libb10-asiolink.la
-b10_dhcp6_LDADD += $(top_builddir)/src/lib/log/libb10-log.la
+b10_dhcp6_LDADD  = $(top_builddir)/src/lib/asiolink/libb10-asiolink.la
+b10_dhcp6_LDADD += $(top_builddir)/src/lib/cc/libb10-cc.la
+b10_dhcp6_LDADD += $(top_builddir)/src/lib/config/libb10-cfgclient.la
 b10_dhcp6_LDADD += $(top_builddir)/src/lib/dhcp/libb10-dhcp++.la
 b10_dhcp6_LDADD += $(top_builddir)/src/lib/dhcpsrv/libb10-dhcpsrv.la
-b10_dhcp6_LDADD += $(top_builddir)/src/lib/config/libb10-cfgclient.la
-b10_dhcp6_LDADD += $(top_builddir)/src/lib/cc/libb10-cc.la
+b10_dhcp6_LDADD += $(top_builddir)/src/lib/exceptions/libb10-exceptions.la
+b10_dhcp6_LDADD += $(top_builddir)/src/lib/log/libb10-log.la
+b10_dhcp6_LDADD += $(top_builddir)/src/lib/util/libb10-util.la
 
 b10_dhcp6dir = $(pkgdatadir)
 b10_dhcp6_DATA = dhcp6.spec

src/bin/dhcp6/config_parser.cc

@@ -496,12 +496,12 @@ private:
 ///
 /// This parser parses configuration entries that specify value of
 /// a single option. These entries include option name, option code
-/// and data carried by the option. If parsing is successful than an
+/// and data carried by the option. If parsing is successful then an
 /// instance of an option is created and added to the storage provided
 /// by the calling class.
 ///
 /// @todo This class parses and validates the option name. However it is
-/// not used anywhere util support for option spaces is implemented
+/// not used anywhere until support for option spaces is implemented
 /// (see tickets #2319, #2314). When option spaces are implemented
 /// there will be a way to reference the particular option using
 /// its type (code) or option name.
@@ -857,26 +857,21 @@ public:
             // a setStorage and build methods are invoked.
 
             // Try uint32 type parser.
-            if (buildParser<Uint32Parser, Uint32Storage >(parser, uint32_values_,
-                                                          param.second)) {
-                // Storage set, build invoked on the parser, proceed with
-                // next configuration element.
-                continue;
-            }
-            // Try string type parser.
-            if (buildParser<StringParser, StringStorage >(parser, string_values_,
-                                                          param.second)) {
-                continue;
-            }
-            // Try pools parser.
-            if (buildParser<PoolParser, PoolStorage >(parser, pools_,
-                                                      param.second)) {
-                continue;
-            }
-            // Try option data parser.
-            if (buildParser<OptionDataListParser, OptionStorage >(parser, options_,
-                                                                  param.second)) {
-                continue;
+            if (!buildParser<Uint32Parser, Uint32Storage >(parser, uint32_values_,
+                                                           param.second) &&
+                // Try string type parser.
+                !buildParser<StringParser, StringStorage >(parser, string_values_,
+                                                           param.second) &&
+                // Try pool parser.
+                !buildParser<PoolParser, PoolStorage >(parser, pools_,
+                                                       param.second) &&
+                // Try option data parser.
+                !buildParser<OptionDataListParser, OptionStorage >(parser, options_,
+                                                                   param.second)) {
+                // Appropriate parsers are created in the createSubnet6ConfigParser
+                // and they should be limited to those that we check here for. Thus,
+                // if we fail to find a matching parser here it is a programming error.
+                isc_throw(Dhcp6ConfigError, "failed to find suitable parser");
             }
         }
         // Ok, we now have subnet parsed

src/bin/dhcp6/dhcp6_messages.mes

@@ -47,9 +47,9 @@ This is an informational message reporting that the configuration has
 been extended to include the specified subnet.
 
 % DHCP6_CONFIG_OPTION_DUPLICATE multiple options with the code: %1 added to the subnet: %2
-This warning message is issued on attempt to configure multiple options with the
+This warning message is issued on an attempt to configure multiple options with the
 same option code for the particular subnet. Adding multiple options is uncommon
-for DHCPv6, yet it is not prohibited.
+for DHCPv6, but it is not prohibited.
 
 % DHCP6_CONFIG_START DHCPv6 server is processing the following configuration: %1
 This is a debug message that is issued every time the server receives a

src/bin/dhcp6/tests/Makefile.am

@@ -63,14 +63,13 @@ dhcp6_unittests_CPPFLAGS = $(AM_CPPFLAGS) $(GTEST_INCLUDES)
 dhcp6_unittests_LDFLAGS = $(AM_LDFLAGS) $(GTEST_LDFLAGS)
 dhcp6_unittests_LDADD = $(GTEST_LDADD)
 dhcp6_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libb10-asiolink.la
-dhcp6_unittests_LDADD += $(top_builddir)/src/lib/util/libb10-util.la
+dhcp6_unittests_LDADD += $(top_builddir)/src/lib/cc/libb10-cc.la
+dhcp6_unittests_LDADD += $(top_builddir)/src/lib/config/libb10-cfgclient.la
 dhcp6_unittests_LDADD += $(top_builddir)/src/lib/dhcp/libb10-dhcp++.la
 dhcp6_unittests_LDADD += $(top_builddir)/src/lib/dhcpsrv/libb10-dhcpsrv.la
-dhcp6_unittests_LDADD += $(top_builddir)/src/lib/log/libb10-log.la
 dhcp6_unittests_LDADD += $(top_builddir)/src/lib/exceptions/libb10-exceptions.la
-dhcp6_unittests_LDADD += $(top_builddir)/src/lib/config/libb10-cfgclient.la
-dhcp6_unittests_LDADD += $(top_builddir)/src/lib/cc/libb10-cc.la
-
+dhcp6_unittests_LDADD += $(top_builddir)/src/lib/log/libb10-log.la
+dhcp6_unittests_LDADD += $(top_builddir)/src/lib/util/libb10-util.la
 endif
 
 noinst_PROGRAMS = $(TESTS)

src/bin/dhcp6/tests/config_parser_unittest.cc

@@ -97,6 +97,7 @@ public:
             if (!first) {
                 stream << ", ";
             } else {
+                // cppcheck-suppress unreadVariable
                 first = false;
             }
             if (param.first == "name") {
@@ -144,14 +145,14 @@ public:
                    << ex.what() << std::endl;
         }
 
-
-        // returned value should be 0 (configuration success)
+        // status object must not be NULL
         if (!status) {
             FAIL() << "Fatal error: unable to reset configuration database"
                    << " after the test. Configuration function returned"
                    << " NULL pointer" << std::endl;
         }
         comment_ = parseAnswer(rcode_, status);
+        // returned value should be 0 (configuration success)
         if (rcode_ != 0) {
             FAIL() << "Fatal error: unable to reset configuration database"
                    << " after the test. Configuration function returned"
@@ -215,9 +216,10 @@ public:
             ASSERT_EQ(buf.getLength() - option_desc.option->getHeaderLen(),
                       expected_data_len);
         }
-        // Verify that the data is correct. However do not verify suboptions.
+        // Verify that the data is correct. Do not verify suboptions and a header.
         const uint8_t* data = static_cast<const uint8_t*>(buf.getData());
-        EXPECT_TRUE(memcmp(expected_data, data, expected_data_len));
+        EXPECT_EQ(0, memcmp(expected_data, data + option_desc.option->getHeaderLen(),
+                            expected_data_len));
     }
 
     Dhcpv6Srv srv_;