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// Copyright (C) 2016-2017 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/.
#include <config.h>
#include <cc/simple_parser.h>
#include <asiolink/io_address.h>
#include <boost/foreach.hpp>
#include <boost/lexical_cast.hpp>
#include <cc/data.h>
#include <string>
using namespace std;
using namespace isc::asiolink;
using isc::dhcp::DhcpConfigError;
namespace isc {
namespace data {
std::string
SimpleParser::getString(isc::data::ConstElementPtr scope, const std::string& name) {
ConstElementPtr x = scope->get(name);
if (!x) {
isc_throw(DhcpConfigError,
"missing parameter '" << name << "' ("
<< scope->getPosition() << ")");
}
if (x->getType() != Element::string) {
isc_throw(DhcpConfigError,
"invalid type specified for parameter '" << name
<< "' (" << x->getPosition() << ")");
}
return (x->stringValue());
}
int64_t
SimpleParser::getInteger(isc::data::ConstElementPtr scope, const std::string& name) {
ConstElementPtr x = scope->get(name);
if (!x) {
isc_throw(DhcpConfigError,
"missing parameter '" << name << "' ("
<< scope->getPosition() << ")");
}
if (x->getType() != Element::integer) {
isc_throw(DhcpConfigError,
"invalid type specified for parameter '" << name
<< "' (" << x->getPosition() << ")");
}
return (x->intValue());
}
bool
SimpleParser::getBoolean(isc::data::ConstElementPtr scope, const std::string& name) {
ConstElementPtr x = scope->get(name);
if (!x) {
isc_throw(DhcpConfigError,
"missing parameter '" << name << "' ("
<< scope->getPosition() << ")");
}
if (x->getType() != Element::boolean) {
isc_throw(DhcpConfigError,
"invalid type specified for parameter '" << name
<< "' (" << x->getPosition() << ")");
}
return (x->boolValue());
}
IOAddress
SimpleParser::getAddress(const ConstElementPtr& scope,
const std::string& name) {
std::string str = getString(scope, name);
try {
return (IOAddress(str));
} catch (const std::exception& e) {
isc_throw(DhcpConfigError, "Failed to convert '" << str
<< "' to address: " << e.what() << "("
<< getPosition(name, scope) << ")");
}
}
const data::Element::Position&
SimpleParser::getPosition(const std::string& name, const data::ConstElementPtr parent) {
if (!parent) {
return (data::Element::ZERO_POSITION());
}
ConstElementPtr elem = parent->get(name);
if (!elem) {
return (parent->getPosition());
}
return (elem->getPosition());
}
size_t SimpleParser::setDefaults(isc::data::ElementPtr scope,
const SimpleDefaults& default_values) {
size_t cnt = 0;
// This is the position representing a default value. As the values
// we're inserting here are not present in whatever the config file
// came from, we need to make sure it's clearly labeled as default.
const Element::Position pos("<default-value>", 0, 0);
// Let's go over all parameters we have defaults for.
BOOST_FOREACH(SimpleDefault def_value, default_values) {
// Try if such a parameter is there. If it is, let's
// skip it, because user knows best *cough*.
ConstElementPtr x = scope->get(string(def_value.name_));
if (x) {
// There is such a value already, skip it.
continue;
}
// There isn't such a value defined, let's create the default
// value...
switch (def_value.type_) {
case Element::string: {
x.reset(new StringElement(def_value.value_, pos));
break;
}
case Element::integer: {
try {
int int_value = boost::lexical_cast<int>(def_value.value_);
x.reset(new IntElement(int_value, pos));
}
catch (const std::exception& ex) {
isc_throw(BadValue, "Internal error. Integer value expected for: "
<< def_value.name_ << ", value is: "
<< def_value.value_ );
}
break;
}
case Element::boolean: {
bool bool_value;
if (def_value.value_ == string("true")) {
bool_value = true;
} else if (def_value.value_ == string("false")) {
bool_value = false;
} else {
isc_throw(DhcpConfigError,
"Internal error. Boolean value specified as "
<< def_value.value_ << ", expected true or false");
}
x.reset(new BoolElement(bool_value, pos));
break;
}
case Element::real: {
double dbl_value = boost::lexical_cast<double>(def_value.value_);
x.reset(new DoubleElement(dbl_value, pos));
break;
}
default:
// No default values for null, list or map
isc_throw(DhcpConfigError,
"Internal error. Incorrect default value type.");
}
// ... and insert it into the provided Element tree.
scope->set(def_value.name_, x);
++cnt;
}
return (cnt);
}
size_t
SimpleParser::setListDefaults(isc::data::ConstElementPtr list,
const SimpleDefaults& default_values) {
size_t cnt = 0;
BOOST_FOREACH(ElementPtr entry, list->listValue()) {
cnt += setDefaults(entry, default_values);
}
return (cnt);
}
size_t
SimpleParser::deriveParams(isc::data::ConstElementPtr parent,
isc::data::ElementPtr child,
const ParamsList& params) {
if ( (parent->getType() != Element::map) ||
(child->getType() != Element::map)) {
return (0);
}
size_t cnt = 0;
BOOST_FOREACH(string param, params) {
ConstElementPtr x = parent->get(param);
if (!x) {
// Parent doesn't define this parameter, so there's
// nothing to derive from
continue;
}
if (child->get(param)) {
// Child defines this parameter already. There's
// nothing to do here.
continue;
}
// Copy the parameters to the child scope.
child->set(param, x);
cnt++;
}
return (cnt);
}
}; // end of isc::dhcp namespace
}; // end of isc namespace
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