[#93,!51] Added config backend constants with buffer lengths.

3 files changed, 96 insertions, 39 deletions

diff --git a/src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.cc b/src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.cc
index 887001b0cb..9dc62c0710 100644
--- a/src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.cc
+++ b/src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.cc
@@ -7,6 +7,7 @@
 #include <mysql_cb_dhcp4.h>
 #include <mysql_cb_impl.h>
 #include <cc/data.h>
+#include <config_backend/constants.h>
 #include <database/db_exceptions.h>
 #include <dhcp/classify.h>
 #include <dhcp/dhcp6.h>
@@ -28,6 +29,7 @@
 #include <utility>
 #include <vector>
 
+using namespace isc::cb;
 using namespace isc::db;
 using namespace isc::data;
 using namespace isc::asiolink;
@@ -118,24 +120,24 @@ public:
         // statement.
         MySqlBindingCollection out_bindings = {
             MySqlBinding::createInteger<uint32_t>(), // subnet_id
-            MySqlBinding::createString(32), // subnet_prefix
-            MySqlBinding::createString(128), // 4o6_interface
-            MySqlBinding::createString(128), // 4o6_interface_id
-            MySqlBinding::createString(64), // 4o6_subnet
-            MySqlBinding::createString(512), // boot_file_name
-            MySqlBinding::createString(128), // client_class
-            MySqlBinding::createString(128), // interface
+            MySqlBinding::createString(SUBNET_PREFIX_BUF_LENGTH), // subnet_prefix
+            MySqlBinding::createString(DHCP4O6_INTERFACE_BUF_LENGTH), // 4o6_interface
+            MySqlBinding::createString(DHCP4O6_INTERFACE_ID_BUF_LENGTH), // 4o6_interface_id
+            MySqlBinding::createString(DHCP4O6_SUBNET_BUF_LENGTH), // 4o6_subnet
+            MySqlBinding::createString(BOOT_FILE_NAME_BUF_LENGTH), // boot_file_name
+            MySqlBinding::createString(CLIENT_CLASS_BUF_LENGTH), // client_class
+            MySqlBinding::createString(INTERFACE_BUF_LENGTH), // interface
             MySqlBinding::createInteger<uint8_t>(), // match_client_id
             MySqlBinding::createTimestamp(), // modification_ts
             MySqlBinding::createInteger<uint32_t>(), // next_server
             MySqlBinding::createInteger<uint32_t>(), // rebind_timer
-            MySqlBinding::createString(65536), // relay
+            MySqlBinding::createString(RELAY_BUF_LENGTH), // relay
             MySqlBinding::createInteger<uint32_t>(), // renew_timer
-            MySqlBinding::createString(65536), // require_client_classes
+            MySqlBinding::createString(REQUIRE_CLIENT_CLASSES_BUF_LENGTH), // require_client_classes
             MySqlBinding::createInteger<uint8_t>(), // reservation_mode
-            MySqlBinding::createString(512), // server_hostname
-            MySqlBinding::createString(128), // shared_network_name
-            MySqlBinding::createString(65536), // user_context
+            MySqlBinding::createString(SERVER_HOSTNAME_BUF_LENGTH), // server_hostname
+            MySqlBinding::createString(SHARED_NETWORK_NAME_BUF_LENGTH), // shared_network_name
+            MySqlBinding::createString(USER_CONTEXT_BUF_LENGTH), // user_context
             MySqlBinding::createInteger<uint32_t>(), // valid_lifetime
             MySqlBinding::createInteger<uint64_t>(), // pool: id
             MySqlBinding::createInteger<uint32_t>(), // pool: start_address
@@ -144,26 +146,26 @@ public:
             MySqlBinding::createTimestamp(), // pool: modification_ts
             MySqlBinding::createInteger<uint64_t>(), // pool option: option_id
             MySqlBinding::createInteger<uint8_t>(), // pool option: code
-            MySqlBinding::createBlob(65536), // pool option: value
-            MySqlBinding::createString(8192), // pool option: formatted_value
-            MySqlBinding::createString(128), // pool option: space
+            MySqlBinding::createBlob(OPTION_VALUE_BUF_LENGTH), // pool option: value
+            MySqlBinding::createString(FORMATTED_OPTION_VALUE_BUF_LENGTH), // pool option: formatted_value
+            MySqlBinding::createString(OPTION_SPACE_BUF_LENGTH), // pool option: space
             MySqlBinding::createInteger<uint8_t>(), // pool option: persistent
             MySqlBinding::createInteger<uint32_t>(), // pool option: dhcp4_subnet_id
             MySqlBinding::createInteger<uint8_t>(), // pool option: scope_id
-            MySqlBinding::createString(65536), // pool option: user_context
-            MySqlBinding::createString(128), // pool option: shared_network_name
+            MySqlBinding::createString(USER_CONTEXT_BUF_LENGTH), // pool option: user_context
+            MySqlBinding::createString(SHARED_NETWORK_NAME_BUF_LENGTH), // pool option: shared_network_name
             MySqlBinding::createInteger<uint64_t>(), // pool option: pool_id
             MySqlBinding::createTimestamp(), //pool option: modification_ts
             MySqlBinding::createInteger<uint64_t>(), // option: option_id
             MySqlBinding::createInteger<uint8_t>(), // option: code
-            MySqlBinding::createBlob(65536), // option: value
-            MySqlBinding::createString(8192), // option: formatted_value
-            MySqlBinding::createString(128), // option: space
+            MySqlBinding::createBlob(OPTION_VALUE_BUF_LENGTH), // option: value
+            MySqlBinding::createString(FORMATTED_OPTION_VALUE_BUF_LENGTH), // option: formatted_value
+            MySqlBinding::createString(OPTION_SPACE_BUF_LENGTH), // option: space
             MySqlBinding::createInteger<uint8_t>(), // option: persistent
             MySqlBinding::createInteger<uint32_t>(), // option: dhcp4_subnet_id
             MySqlBinding::createInteger<uint8_t>(), // option: scope_id
-            MySqlBinding::createString(65536), // option: user_context
-            MySqlBinding::createString(128), // option: shared_network_name
+            MySqlBinding::createString(USER_CONTEXT_BUF_LENGTH), // option: user_context
+            MySqlBinding::createString(SHARED_NETWORK_NAME_BUF_LENGTH), // option: shared_network_name
             MySqlBinding::createInteger<uint64_t>(), // option: pool_id
             MySqlBinding::createTimestamp() //option: modification_ts
         };
@@ -396,14 +398,14 @@ public:
             MySqlBinding::createTimestamp(), // pool: modification_ts
             MySqlBinding::createInteger<uint64_t>(), // pool option: option_id
             MySqlBinding::createInteger<uint8_t>(), // pool option: code
-            MySqlBinding::createBlob(65536), // pool option: value
-            MySqlBinding::createString(8192), // pool option: formatted_value
-            MySqlBinding::createString(128), // pool option: space
+            MySqlBinding::createBlob(OPTION_VALUE_BUF_LENGTH), // pool option: value
+            MySqlBinding::createString(FORMATTED_OPTION_VALUE_BUF_LENGTH), // pool option: formatted_value
+            MySqlBinding::createString(OPTION_SPACE_BUF_LENGTH), // pool option: space
             MySqlBinding::createInteger<uint8_t>(), // pool option: persistent
             MySqlBinding::createInteger<uint32_t>(), // pool option: dhcp4_subnet_id
             MySqlBinding::createInteger<uint8_t>(), // pool option: scope_id
-            MySqlBinding::createString(65536), // pool option: user_context
-            MySqlBinding::createString(128), // pool option: shared_network_name
+            MySqlBinding::createString(USER_CONTEXT_BUF_LENGTH), // pool option: user_context
+            MySqlBinding::createString(SHARED_NETWORK_NAME_BUF_LENGTH), // pool option: shared_network_name
             MySqlBinding::createInteger<uint64_t>(), // pool option: pool_id
             MySqlBinding::createTimestamp(), //pool option: modification_ts
         };
@@ -648,28 +650,28 @@ public:
         // statement.
         MySqlBindingCollection out_bindings = {
             MySqlBinding::createInteger<uint64_t>(), // id
-            MySqlBinding::createString(128), // name
-            MySqlBinding::createString(128), // client_class
-            MySqlBinding::createString(128), // interface
+            MySqlBinding::createString(SHARED_NETWORK_NAME_BUF_LENGTH), // name
+            MySqlBinding::createString(CLIENT_CLASS_BUF_LENGTH), // client_class
+            MySqlBinding::createString(INTERFACE_BUF_LENGTH), // interface
             MySqlBinding::createInteger<uint8_t>(), // match_client_id
             MySqlBinding::createTimestamp(), // modification_ts
             MySqlBinding::createInteger<uint32_t>(), // rebind_timer
-            MySqlBinding::createString(65536), // relay
+            MySqlBinding::createString(RELAY_BUF_LENGTH), // relay
             MySqlBinding::createInteger<uint32_t>(), // renew_timer
-            MySqlBinding::createString(65536), // require_client_classes
+            MySqlBinding::createString(REQUIRE_CLIENT_CLASSES_BUF_LENGTH), // require_client_classes
             MySqlBinding::createInteger<uint8_t>(), // reservation_mode
-            MySqlBinding::createString(65536), // user_context
+            MySqlBinding::createString(USER_CONTEXT_BUF_LENGTH), // user_context
             MySqlBinding::createInteger<uint32_t>(), // valid_lifetime
             MySqlBinding::createInteger<uint64_t>(), // option: option_id
             MySqlBinding::createInteger<uint8_t>(), // option: code
-            MySqlBinding::createBlob(65536), // option: value
-            MySqlBinding::createString(8192), // option: formatted_value
-            MySqlBinding::createString(128), // option: space
+            MySqlBinding::createBlob(OPTION_VALUE_BUF_LENGTH), // option: value
+            MySqlBinding::createString(FORMATTED_OPTION_VALUE_BUF_LENGTH), // option: formatted_value
+            MySqlBinding::createString(OPTION_SPACE_BUF_LENGTH), // option: space
             MySqlBinding::createInteger<uint8_t>(), // option: persistent
             MySqlBinding::createInteger<uint32_t>(), // option: dhcp4_subnet_id
             MySqlBinding::createInteger<uint8_t>(), // option: scope_id
-            MySqlBinding::createString(65536), // option: user_context
-            MySqlBinding::createString(128), // option: shared_network_name
+            MySqlBinding::createString(USER_CONTEXT_BUF_LENGTH), // option: user_context
+            MySqlBinding::createString(SHARED_NETWORK_NAME_BUF_LENGTH), // option: shared_network_name
             MySqlBinding::createInteger<uint64_t>(), // option: pool_id
             MySqlBinding::createTimestamp() //option: modification_ts
         };
diff --git a/src/lib/config_backend/Makefile.am b/src/lib/config_backend/Makefile.am
index 163d378799..2b51675719 100644
--- a/src/lib/config_backend/Makefile.am
+++ b/src/lib/config_backend/Makefile.am
@@ -8,6 +8,7 @@ AM_CXXFLAGS = $(KEA_CXXFLAGS)
 EXTRA_DIST  = base_config_backend.h
 EXTRA_DIST += base_config_backend_mgr.h
 EXTRA_DIST += base_config_backend_pool.h
+EXTRA_DIST += constants.h
 
 # The message file should be in the distribution.
 #EXTRA_DIST += config_backend.dox
@@ -19,5 +20,6 @@ libkea_cb_includedir = $(pkgincludedir)/config_backend
 libkea_cb_include_HEADERS = \
 	base_config_backend.h \
 	base_config_backend_mgr.h \
-	base_config_backend_pool.h
+	base_config_backend_pool.h \
+	constants.h
 
diff --git a/src/lib/config_backend/constants.h b/src/lib/config_backend/constants.h
new file mode 100644
index 0000000000..d47190080f
--- /dev/null
+++ b/src/lib/config_backend/constants.h
@@ -0,0 +1,53 @@
+// Copyright (C) 2018 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 CONFIG_BACKEND_CONSTANTS_H
+#define CONFIG_BACKEND_CONSTANTS_H
+
+namespace isc {
+namespace cb {
+
+/// @name Constants specifying output buffer lengths.
+///
+/// Config backends create buffers of these sizes to store
+/// fetched variable length data in them.
+///
+//@{
+constexpr unsigned long SUBNET_PREFIX_BUF_LENGTH = 32;
+
+constexpr unsigned long DHCP4O6_INTERFACE_BUF_LENGTH = 128;
+
+constexpr unsigned long DHCP4O6_INTERFACE_ID_BUF_LENGTH = 128;
+
+constexpr unsigned long DHCP4O6_SUBNET_BUF_LENGTH = 64;
+
+constexpr unsigned long BOOT_FILE_NAME_BUF_LENGTH = 512;
+
+constexpr unsigned long CLIENT_CLASS_BUF_LENGTH = 128;
+
+constexpr unsigned long INTERFACE_BUF_LENGTH = 128;
+
+constexpr unsigned long RELAY_BUF_LENGTH = 65536;
+
+constexpr unsigned long REQUIRE_CLIENT_CLASSES_BUF_LENGTH = 65536;
+
+constexpr unsigned long SERVER_HOSTNAME_BUF_LENGTH = 512;
+
+constexpr unsigned long SHARED_NETWORK_NAME_BUF_LENGTH = 128;
+
+constexpr unsigned long USER_CONTEXT_BUF_LENGTH = 65536;
+
+constexpr unsigned long OPTION_VALUE_BUF_LENGTH = 65536;
+
+constexpr unsigned long FORMATTED_OPTION_VALUE_BUF_LENGTH = 8192;
+
+constexpr unsigned long OPTION_SPACE_BUF_LENGTH = 128;
+//*}
+
+} // end of namespace isc::cb
+} // end of namespace isc
+
+#endif