[5036] readonly support added in hosts-database

doc/examples/kea6/mysql-reservations.json

@@ -45,7 +45,8 @@
     "name": "kea",
     "user": "kea",
     "password": "kea",
-    "host": "localhost"
+    "host": "localhost",
+    "readonly": true
   },
 
 # Define a subnet with a pool of dynamic addresses and a pool of dynamic

src/bin/dhcp6/dhcp6_lexer.ll

@@ -157,7 +157,7 @@ ControlCharacterFill            [^"\\]|\\{JSONEscapeSequence}
     isc_throw(Dhcp6ParseError, "Directive not closed.");
 }
 <DIR_EXIT>"?>" BEGIN(INITIAL);
-    
+
 
 <*>{blank}+   {
     // Ok, we found a with space. Let's ignore it and update loc variable.
@@ -216,6 +216,15 @@ ControlCharacterFill            [^"\\]|\\{JSONEscapeSequence}
     }
 }
 
+\"readonly\" {
+    switch(driver.ctx_) {
+    case isc::dhcp::Parser6Context::HOSTS_DATABASE:
+        return isc::dhcp::Dhcp6Parser::make_READONLY(driver.loc_);
+    default:
+        return isc::dhcp::Dhcp6Parser::make_STRING("readonly", driver.loc_);
+    }
+}
+
 \"type\" {
     switch(driver.ctx_) {
     case isc::dhcp::Parser6Context::LEASE_DATABASE:
@@ -961,7 +970,7 @@ ControlCharacterFill            [^"\\]|\\{JSONEscapeSequence}
     // Bad string with a bad escape inside
     driver.error(driver.loc_, "Bad escape in " + std::string(yytext));
 }
-    
+
 \"{JSONStringCharacter}*\\\" {
     // Bad string with an open escape at the end
     driver.error(driver.loc_, "Overflow escape in " + std::string(yytext));

src/bin/dhcp6/dhcp6_parser.yy

@@ -62,6 +62,7 @@ using namespace std;
   HOST "host"
   PERSIST "persist"
   LFC_INTERVAL "lfc-interval"
+  READONLY "readonly"
 
   PREFERRED_LIFETIME "preferred-lifetime"
   VALID_LIFETIME "valid-lifetime"
@@ -442,6 +443,7 @@ database_map_param: type
                   | name
                   | persist
                   | lfc_interval
+                  | readonly
                   | unknown_map_entry
 ;
 
@@ -495,6 +497,11 @@ lfc_interval: LFC_INTERVAL COLON INTEGER {
     ctx.stack_.back()->set("lfc-interval", n);
 };
 
+readonly: READONLY COLON BOOLEAN {
+    ElementPtr n(new BoolElement($3, ctx.loc2pos(@3)));
+    ctx.stack_.back()->set("readonly", n);
+};
+
 mac_sources: MAC_SOURCES {
     ElementPtr l(new ListElement(ctx.loc2pos(@1)));
     ctx.stack_.back()->set("mac-sources", l);
@@ -803,6 +810,9 @@ option_def_entry: LCURLY_BRACKET {
     ctx.stack_.pop_back();
 };
 
+// This defines the top level scope when the parser is told to parse a single
+// option definition. It's almost exactly the same as option_def_entry, except
+// that it does leave its value on stack.
 sub_option_def: LCURLY_BRACKET {
     // Parse the option-def list entry map
     ElementPtr m(new MapElement(ctx.loc2pos(@1)));
@@ -893,6 +903,8 @@ option_data_list_content: %empty
                         | not_empty_option_data_list
                         ;
 
+// This defines the content of option-data list. It can either
+// be a single value or multiple entries separated by comma.
 not_empty_option_data_list: option_data_entry
                           | not_empty_option_data_list COMMA option_data_entry
                           ;
@@ -907,6 +919,9 @@ option_data_entry: LCURLY_BRACKET {
     ctx.stack_.pop_back();
 };
 
+// This defines the top level scope when the parser is told to parse a single
+// option data. It's almost exactly the same as option_data_entry, except
+// that it does leave its value on stack.
 sub_option_data: LCURLY_BRACKET {
     // Parse the option-data list entry map
     ElementPtr m(new MapElement(ctx.loc2pos(@1)));