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425 | // Copyright (C) 2017-2024 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 <asiolink/io_address.h>
#include <cc/data.h>
#include <dhcpsrv/cfgmgr.h>
#include <dhcpsrv/cfg_option.h>
#include <dhcpsrv/parsers/option_data_parser.h>
#include <dhcpsrv/parsers/shared_network_parser.h>
#include <dhcpsrv/parsers/simple_parser4.h>
#include <dhcpsrv/parsers/simple_parser6.h>
#include <dhcpsrv/shared_network.h>
#include <boost/make_shared.hpp><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <boost/pointer_cast.hpp><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <string><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
using namespace isc::asiolink;
using namespace isc::data;
using namespace isc::util;
namespace isc {
namespace dhcp {
SharedNetwork4Parser::SharedNetwork4Parser(bool check_iface)
: check_iface_(check_iface) {
}
SharedNetwork4Ptr
SharedNetwork4Parser::parse(const data::ConstElementPtr& shared_network_data,
bool encapsulate_options) {
SharedNetwork4Ptr shared_network;
try {
// Check parameters.
checkKeywords(SimpleParser4::SHARED_NETWORK4_PARAMETERS,
shared_network_data);
// Make sure that the network name has been specified. The name is required
// to create a SharedNetwork4 object.
std::string name = getString(shared_network_data, "name");
shared_network.reset(new SharedNetwork4(name));
// Move from reservation mode to new reservations flags.
ElementPtr mutable_params;
mutable_params = boost::const_pointer_cast<Element>(shared_network_data);
BaseNetworkParser::moveReservationMode(mutable_params);
// Parse parameters common to all Network derivations.
NetworkPtr network = boost::dynamic_pointer_cast<Network>(shared_network);
parseCommon(mutable_params, network);
// interface is an optional parameter
if (shared_network_data->contains("interface")) {
std::string iface = getString(shared_network_data, "interface");
if (!iface.empty()) {
if (check_iface_ && !IfaceMgr::instance().getIface(iface)) {
ConstElementPtr error =
shared_network_data->get("interface");
isc_throw(DhcpConfigError,
"Specified network interface name " << iface
<< " for shared network " << name
<< " is not present in the system ("
<< error->getPosition() << ")");
}
shared_network->setIface(iface);
}
}
if (shared_network_data->contains("option-data")) {
auto json = shared_network_data->get("option-data");
// Create parser instance for option-data.
CfgOptionPtr cfg_option = shared_network->getCfgOption();
auto parser = createOptionDataListParser();
parser->parse(cfg_option, json, encapsulate_options);
}
if (shared_network_data->contains("subnet4")) {
auto json = shared_network_data->get("subnet4");
// Create parser instance of subnet4.
auto parser = createSubnetsListParser();
Subnet4Collection subnets;
parser->parse(subnets, json);
// Add all returned subnets into shared network.
for (auto const& subnet : subnets) {
shared_network->add(subnet);
}
}
if (shared_network_data->contains("match-client-id")) {
shared_network->setMatchClientId(getBoolean(shared_network_data,
"match-client-id"));
}
if (shared_network_data->contains("authoritative")) {
shared_network->setAuthoritative(getBoolean(shared_network_data,
"authoritative"));
}
// Set next-server
if (shared_network_data->contains("next-server")) {
std::string next_server;
try {
next_server = getString(shared_network_data, "next-server");
if (!next_server.empty()) {
shared_network->setSiaddr(IOAddress(next_server));
}
} catch (...) {
ConstElementPtr next = shared_network_data->get("next-server");
std::string pos;
if (next) {
pos = next->getPosition().str();
} else {
pos = shared_network_data->getPosition().str();
}
isc_throw(DhcpConfigError, "invalid parameter next-server : "
<< next_server << "(" << pos << ")");
}
}
// Set server-hostname.
if (shared_network_data->contains("server-hostname")) {
std::string sname = getString(shared_network_data, "server-hostname");
if (!sname.empty()) {
if (sname.length() >= Pkt4::MAX_SNAME_LEN) {
ConstElementPtr error = shared_network_data->get("server-hostname");
isc_throw(DhcpConfigError, "server-hostname must be at most "
<< Pkt4::MAX_SNAME_LEN - 1 << " bytes long, it is "
<< sname.length() << " ("
<< error->getPosition() << ")");
}
shared_network->setSname(sname);
}
}
// Set boot-file-name.
if (shared_network_data->contains("boot-file-name")) {
std::string filename = getString(shared_network_data, "boot-file-name");
if (!filename.empty()) {
if (filename.length() > Pkt4::MAX_FILE_LEN) {
ConstElementPtr error = shared_network_data->get("boot-file-name");
isc_throw(DhcpConfigError, "boot-file-name must be at most "
<< Pkt4::MAX_FILE_LEN - 1 << " bytes long, it is "
<< filename.length() << " ("
<< error->getPosition() << ")");
}
shared_network->setFilename(filename);
}
}
if (shared_network_data->contains("client-class")) {
std::string client_class = getString(shared_network_data, "client-class");
if (!client_class.empty()) {
shared_network->allowClientClass(client_class);
}
}
ConstElementPtr user_context = shared_network_data->get("user-context");
if (user_context) {
shared_network->setContext(user_context);
}
if (shared_network_data->contains("require-client-classes")) {
const std::vector<data::ElementPtr>& class_list =
shared_network_data->get("require-client-classes")->listValue();
for (auto const& cclass : class_list) {
if ((cclass->getType() != Element::string) ||
cclass->stringValue().empty()) {
isc_throw(DhcpConfigError, "invalid class name ("
<< cclass->getPosition() << ")");
}
shared_network->requireClientClass(cclass->stringValue());
}
}
if (shared_network_data->contains("relay")) {
auto relay_parms = shared_network_data->get("relay");
if (relay_parms) {
RelayInfoParser parser(Option::V4);
Network::RelayInfoPtr relay_info(new Network::RelayInfo());
parser.parse(relay_info, relay_parms);
shared_network->setRelayInfo(*relay_info);
}
}
parseTeePercents(shared_network_data, network);
// Parse DDNS parameters
parseDdnsParams(shared_network_data, network);
// Parse lease cache parameters
parseCacheParams(shared_network_data, network);
// Parse allocator params.
parseAllocatorParams(shared_network_data, network);
// Parse offer-lifetime parameter.
Network4Ptr network4 = boost::dynamic_pointer_cast<Network4>(shared_network);
parseOfferLft(shared_network_data, network4);
} catch (const DhcpConfigError&) {
// Position was already added
throw;
} catch (const std::exception& ex) {
isc_throw(DhcpConfigError, ex.what() << " ("
<< shared_network_data->getPosition() << ")");
}
// In order to take advantage of the dynamic inheritance of global
// parameters to a shared network we need to set a callback function
// for each shared network to allow for fetching global parameters.
shared_network->setFetchGlobalsFn([]() -> ConstCfgGlobalsPtr {
return (CfgMgr::instance().getCurrentCfg()->getConfiguredGlobals());
});
return (shared_network);
}
boost::shared_ptr<OptionDataListParser>
SharedNetwork4Parser::createOptionDataListParser() const {
auto parser = boost::make_shared<OptionDataListParser>(AF_INET);
return (parser);
}
boost::shared_ptr<Subnets4ListConfigParser>
SharedNetwork4Parser::createSubnetsListParser() const {
auto parser = boost::make_shared<Subnets4ListConfigParser>(check_iface_);
return (parser);
}
SharedNetwork6Parser::SharedNetwork6Parser(bool check_iface)
: check_iface_(check_iface) {
}
SharedNetwork6Ptr
SharedNetwork6Parser::parse(const data::ConstElementPtr& shared_network_data,
bool encapsulate_options) {
SharedNetwork6Ptr shared_network;
std::string name;<--- Shadowed declaration
try {
// Check parameters.
checkKeywords(SimpleParser6::SHARED_NETWORK6_PARAMETERS,
shared_network_data);
// Make sure that the network name has been specified. The name is required
// to create a SharedNetwork6 object.
std::string name = getString(shared_network_data, "name");<--- Shadow variable
shared_network.reset(new SharedNetwork6(name));
// Move from reservation mode to new reservations flags.
ElementPtr mutable_params;
mutable_params = boost::const_pointer_cast<Element>(shared_network_data);
BaseNetworkParser::moveReservationMode(mutable_params);
// Parse parameters common to all Network derivations.
NetworkPtr network = boost::dynamic_pointer_cast<Network>(shared_network);
parseCommon(mutable_params, network);
// preferred-lifetime
shared_network->setPreferred(parseIntTriplet(shared_network_data,
"preferred-lifetime"));
// Get interface-id option content. For now we support string
// representation only
Optional<std::string> ifaceid;
if (shared_network_data->contains("interface-id")) {
ifaceid = getString(shared_network_data, "interface-id");
}
// Interface is an optional parameter
Optional<std::string> iface;
if (shared_network_data->contains("interface")) {
iface = getString(shared_network_data, "interface");
}
// Specifying both interface for locally reachable subnets and
// interface id for relays is mutually exclusive. Need to test for
// this condition.
if (!ifaceid.unspecified() && !iface.unspecified() && !ifaceid.empty() &&
!iface.empty()) {
isc_throw(isc::dhcp::DhcpConfigError,
"parser error: interface (defined for locally reachable "
"subnets) and interface-id (defined for subnets reachable"
" via relays) cannot be defined at the same time for "
"shared network " << name << "("
<< shared_network_data->getPosition() << ")");
}
// Configure interface-id for remote interfaces, if defined
if (!ifaceid.unspecified() && !ifaceid.empty()) {
std::string ifaceid_value = ifaceid.get();
OptionBuffer tmp(ifaceid_value.begin(), ifaceid_value.end());
OptionPtr opt(new Option(Option::V6, D6O_INTERFACE_ID, tmp));
shared_network->setInterfaceId(opt);
}
// Set interface name. If it is defined, then subnets are available
// directly over specified network interface.
if (!iface.unspecified() && !iface.empty()) {
if (check_iface_ && !IfaceMgr::instance().getIface(iface)) {
ConstElementPtr error = shared_network_data->get("interface");
isc_throw(DhcpConfigError,
"Specified network interface name " << iface
<< " for shared network " << name
<< " is not present in the system ("
<< error->getPosition() << ")");
}
shared_network->setIface(iface);
}
if (shared_network_data->contains("rapid-commit")) {
shared_network->setRapidCommit(getBoolean(shared_network_data,
"rapid-commit"));
}
if (shared_network_data->contains("option-data")) {
auto json = shared_network_data->get("option-data");
// Create parser instance for option-data.
CfgOptionPtr cfg_option = shared_network->getCfgOption();
auto parser = createOptionDataListParser();
parser->parse(cfg_option, json, encapsulate_options);
}
if (shared_network_data->contains("client-class")) {
std::string client_class = getString(shared_network_data, "client-class");
if (!client_class.empty()) {
shared_network->allowClientClass(client_class);
}
}
ConstElementPtr user_context = shared_network_data->get("user-context");
if (user_context) {
shared_network->setContext(user_context);
}
if (shared_network_data->contains("require-client-classes")) {
const std::vector<data::ElementPtr>& class_list =
shared_network_data->get("require-client-classes")->listValue();
for (auto const& cclass : class_list) {
if ((cclass->getType() != Element::string) ||
cclass->stringValue().empty()) {
isc_throw(DhcpConfigError, "invalid class name ("
<< cclass->getPosition() << ")");
}
shared_network->requireClientClass(cclass->stringValue());
}
}
if (shared_network_data->contains("subnet6")) {
auto json = shared_network_data->get("subnet6");
// Create parser instance of subnet6.
auto parser = createSubnetsListParser();
Subnet6Collection subnets;
parser->parse(subnets, json);
// Add all returned subnets into shared network.
for (auto const& subnet : subnets) {
shared_network->add(subnet);
}
}
if (shared_network_data->contains("relay")) {
auto relay_parms = shared_network_data->get("relay");
if (relay_parms) {
RelayInfoParser parser(Option::V6);
Network::RelayInfoPtr relay_info(new Network::RelayInfo());
parser.parse(relay_info, relay_parms);
shared_network->setRelayInfo(*relay_info);
}
}
parseTeePercents(shared_network_data, network);
// Parse DDNS parameters
parseDdnsParams(shared_network_data, network);
// Parse lease cache parameters
parseCacheParams(shared_network_data, network);
// Parse allocator params.
parseAllocatorParams(shared_network_data, network);
if (network->getAllocatorType() == "flq") {
isc_throw(BadValue, "Free Lease Queue allocator is not supported for IPv6 address pools");
}
// Parse prefix delegation allocator params.
auto network6 = boost::dynamic_pointer_cast<Network6>(shared_network);
parsePdAllocatorParams(shared_network_data, network6);
} catch (const std::exception& ex) {
isc_throw(DhcpConfigError, ex.what() << " ("
<< shared_network_data->getPosition() << ")");
}
// In order to take advantage of the dynamic inheritance of global
// parameters to a shared network we need to set a callback function
// for each shared network which can be used to fetch global parameters.
shared_network->setFetchGlobalsFn([]() -> ConstCfgGlobalsPtr {
return (CfgMgr::instance().getCurrentCfg()->getConfiguredGlobals());
});
return (shared_network);
}
boost::shared_ptr<OptionDataListParser>
SharedNetwork6Parser::createOptionDataListParser() const {
auto parser = boost::make_shared<OptionDataListParser>(AF_INET6);
return (parser);
}
boost::shared_ptr<Subnets6ListConfigParser>
SharedNetwork6Parser::createSubnetsListParser() const {
auto parser = boost::make_shared<Subnets6ListConfigParser>(check_iface_);
return (parser);
}
} // end of namespace isc::dhcp
} // end of namespace isc
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