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368 | // Copyright (C) 2016-2024 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/lexical_cast.hpp><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <cc/data.h>
#include <string><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
using namespace std;
using namespace isc::asiolink;
using namespace isc::dhcp;
using isc::dhcp::DhcpConfigError;
namespace isc {
namespace data {
void
SimpleParser::checkRequired(const SimpleRequiredKeywords& required,
ConstElementPtr scope) {
for (auto const& name : required) {
if (scope->contains(name)) {
continue;
}
isc_throw(DhcpConfigError, "missing '" << name << "' parameter");
}
}
void
SimpleParser::checkKeywords(const SimpleKeywords& keywords,
ConstElementPtr scope) {
string spurious;
for (auto const& entry : scope->mapValue()) {
if (keywords.count(entry.first) == 0) {
if (spurious.empty()) {
spurious = entry.first;
}
continue;
}
Element::types expected = keywords.at(entry.first);
if ((expected == Element::any) ||
(entry.second->getType() == expected)) {
continue;
}
isc_throw(DhcpConfigError, "'" << entry.first << "' parameter is not "
<< (expected == Element::integer ? "an " : "a ")
<< Element::typeToName(expected));
}
if (!spurious.empty()) {
isc_throw(DhcpConfigError, "spurious '" << spurious << "' parameter");
}
}
std::string
SimpleParser::getString(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(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());
}
int64_t
SimpleParser::getInteger(isc::data::ConstElementPtr scope, const std::string& name,
int64_t min, int64_t max) {
int64_t tmp = getInteger(scope, name);
if (tmp < min || tmp > max) {
isc_throw(OutOfRange,
"The '" << name << "' value (" << tmp
<< ") is not within expected range: (" << min << " - " << max
<< ")");
}
return (tmp);
}
bool
SimpleParser::getBoolean(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) << ")");
}
}
double
SimpleParser::getDouble(const 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::real) {
isc_throw(DhcpConfigError,
"invalid type specified for parameter '" << name
<< "' (" << x->getPosition() << ")");
}
return (x->doubleValue());
}
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(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.
for (auto const& 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));<--- Uninitialized variable: bool_value
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(ConstElementPtr list,
const SimpleDefaults& default_values) {
size_t cnt = 0;
for (auto const& entry : list->listValue()) {
cnt += setDefaults(entry, default_values);
}
return (cnt);
}
size_t
SimpleParser::deriveParams(ConstElementPtr parent,
ElementPtr child,
const ParamsList& params) {
if ( (parent->getType() != Element::map) ||
(child->getType() != Element::map)) {
return (0);
}
size_t cnt = 0;
for (auto const& 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);
}
const util::Triplet<uint32_t>
SimpleParser::parseIntTriplet(const ConstElementPtr& scope,
const std::string& name) {
// Initialize as some compilers complain otherwise.
uint32_t value = 0;
bool has_value = false;
uint32_t min_value = 0;
bool has_min = false;
uint32_t max_value = 0;
bool has_max = false;
if (scope->contains(name)) {
value = getInteger(scope, name);
has_value = true;
}
if (scope->contains("min-" + name)) {
min_value = getInteger(scope, "min-" + name);
has_min = true;
}
if (scope->contains("max-" + name)) {
max_value = getInteger(scope, "max-" + name);
has_max = true;
}
if (!has_value && !has_min && !has_max) {
return (util::Triplet<uint32_t>());
}
if (has_value) {
if (!has_min && !has_max) {
// default only.
min_value = value;
max_value = value;
} else if (!has_min) {
// default and max.
min_value = value;
} else if (!has_max) {
// default and min.
max_value = value;
}
} else if (has_min) {
// min only.
if (!has_max) {
value = min_value;
max_value = min_value;
} else {
// min and max.
isc_throw(DhcpConfigError, "have min-" << name << " and max-"
<< name << " but no " << name << " (default) in "
<< scope->getPosition());
}
} else {
// max only.
min_value = max_value;
value = max_value;
}
// Check that min <= max.
if (min_value > max_value) {
if (has_min && has_max) {
isc_throw(DhcpConfigError, "the value of min-" << name << " ("
<< min_value << ") is not less than max-" << name << " ("
<< max_value << ")");
} else if (has_min) {
// Only min and default so min > default.
isc_throw(DhcpConfigError, "the value of min-" << name << " ("
<< min_value << ") is not less than (default) " << name
<< " (" << value << ")");
} else {
// Only default and max so default > max.
isc_throw(DhcpConfigError, "the value of (default) " << name
<< " (" << value << ") is not less than max-" << name
<< " (" << max_value << ")");
}
}
// Check that value is between min and max.
if ((value < min_value) || (value > max_value)) {
isc_throw(DhcpConfigError, "the value of (default) " << name << " ("
<< value << ") is not between min-" << name << " ("
<< min_value << ") and max-" << name << " ("
<< max_value << ")");
}
return (util::Triplet<uint32_t>(min_value, value, max_value));
}
} // end of isc::dhcp namespace
} // end of isc namespace
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