[#225] Added ddsn-ttl-percent parameter

kea-dhcp4/6 both now support ddns-ttl-percent
at the global, shared-network, and subnet scopes.
If specified it is the percentage of the lease
lifetime to send to D2.

Not yet supported by CB.

modified:
doc/examples/kea4/all-keys.json
doc/examples/kea6/all-keys.json
src/bin/dhcp4/dhcp4_lexer.cc
src/bin/dhcp4/dhcp4_lexer.ll
src/bin/dhcp4/dhcp4_parser.cc
src/bin/dhcp4/dhcp4_parser.h
src/bin/dhcp4/dhcp4_parser.yy
src/bin/dhcp4/json_config_parser.cc
src/bin/dhcp4/location.hh
src/bin/dhcp6/dhcp6_lexer.cc
src/bin/dhcp6/dhcp6_lexer.ll
src/bin/dhcp6/dhcp6_parser.cc
src/bin/dhcp6/dhcp6_parser.h
src/bin/dhcp6/dhcp6_parser.yy
src/bin/dhcp6/dhcp6_srv.cc
src/bin/dhcp6/json_config_parser.cc
src/bin/dhcp6/location.hh
src/bin/dhcp6/tests/fqdn_unittest.cc
src/lib/dhcpsrv/cfg_globals.cc
src/lib/dhcpsrv/cfg_globals.h
src/lib/dhcpsrv/dhcpsrv_messages.cc
src/lib/dhcpsrv/dhcpsrv_messages.h
src/lib/dhcpsrv/dhcpsrv_messages.mes
src/lib/dhcpsrv/ncr_generator.cc
src/lib/dhcpsrv/ncr_generator.h
src/lib/dhcpsrv/network.cc
src/lib/dhcpsrv/network.h
src/lib/dhcpsrv/parsers/base_network_parser.cc
src/lib/dhcpsrv/parsers/base_network_parser.h
src/lib/dhcpsrv/parsers/simple_parser4.cc
src/lib/dhcpsrv/parsers/simple_parser6.cc
src/lib/dhcpsrv/srv_config.cc
src/lib/dhcpsrv/srv_config.h
src/lib/dhcpsrv/tests/ncr_generator_unittest.cc
src/lib/dhcpsrv/tests/network_unittest.cc
src/lib/dhcpsrv/tests/srv_config_unittest.cc

1 files changed, 21 insertions, 1 deletions

diff --git a/src/lib/dhcpsrv/network.h b/src/lib/dhcpsrv/network.h
index de3ce2a64a..147f79e826 100644
--- a/src/lib/dhcpsrv/network.h
+++ b/src/lib/dhcpsrv/network.h
@@ -219,7 +219,7 @@ public:
           ddns_replace_client_name_mode_(), ddns_generated_prefix_(), ddns_qualifying_suffix_(),
           hostname_char_set_(), hostname_char_replacement_(), store_extended_info_(),
           cache_threshold_(), cache_max_age_(), ddns_update_on_renew_(),
-          ddns_use_conflict_resolution_() {
+          ddns_use_conflict_resolution_(), ddns_ttl_percent_() {
     }
 
     /// @brief Virtual destructor.
@@ -663,6 +663,23 @@ public:
         ddns_qualifying_suffix_ = ddns_qualifying_suffix;
     }
 
+    /// @brief Returns ddns-ttl-percent
+    ///
+    /// @param inheritance inheritance mode to be used.
+    util::Optional<double>
+    getDdnsTtlPercent(const Inheritance& inheritance = Inheritance::ALL) const {
+        return (getProperty<Network>(&Network::getDdnsTtlPercent,
+                                     ddns_ttl_percent_, inheritance,
+                                     CfgGlobals::DDNS_TTL_PERCENT));
+    }
+
+    /// @brief Sets new ddns-ttl-percent
+    ///
+    /// @param ddns_ttl_percent New value to use.
+    void setDdnsTtlPercent(const util::Optional<double>& ddns_ttl_percent) {
+        ddns_ttl_percent_ = ddns_ttl_percent;
+    }
+
     /// @brief Return the char set regexp used to sanitize client hostnames.
     util::Optional<std::string>
     getHostnameCharSet(const Inheritance& inheritance = Inheritance::ALL) const {
@@ -1195,6 +1212,9 @@ protected:
     /// @brief Allocator used for IP address allocations.
     util::Optional<std::string> allocator_type_;
 
+    /// @brief Percentage of the lease lifetime to use for DNS TTL.
+    util::Optional<double> ddns_ttl_percent_;
+
     /// @brief Pointer to another network that this network belongs to.
     ///
     /// The most common case is that this instance is a subnet which belongs