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// Copyright (C) 2015-2020 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 <dhcp/duid_factory.h>
#include <dhcpsrv/cfg_duid.h>
#include <util/encode/hex.h>
#include <util/strutil.h>
#include <iostream>
#include <string>
#include <string.h>
using namespace isc;
using namespace isc::data;
using namespace isc::util::encode;
using namespace isc::util::str;
namespace isc {
namespace dhcp {
CfgDUID::CfgDUID()
: type_(DUID::DUID_LLT), identifier_(), htype_(0), time_(0),
enterprise_id_(0), persist_(true) {
}
void
CfgDUID::setIdentifier(const std::string& identifier_as_hex) {
// Remove whitespaces.
const std::string identifier = trim(identifier_as_hex);
// Temporary result of parsing.
std::vector<uint8_t> binary;
if (!identifier.empty()) {
try {
// Decode identifier specified as a string of hexadecimal digits.
decodeHex(identifier, binary);
// All went ok, so let's replace identifier with a new value.
identifier_.swap(binary);
} catch (const std::exception& ex) {
isc_throw(BadValue, "identifier specified in the DUID"
" configuration '" << identifier
<< "' is not a valid string of hexadecimal digits");
}
} else {
// If specified identifier is empty, clear our internal identifier.
identifier_.clear();
}
}
DuidPtr
CfgDUID::create(const std::string& duid_file_path) {
// Forget the current DUID.
current_duid_.reset();
// Use DUID factory to create a DUID instance.
DUIDFactory factory(persist() ? duid_file_path : "");
switch (getType()) {
case DUID::DUID_LLT:
factory.createLLT(getHType(), getTime(), getIdentifier());
break;
case DUID::DUID_EN:
factory.createEN(getEnterpriseId(), getIdentifier());
break;
case DUID::DUID_LL:
factory.createLL(getHType(), getIdentifier());
break;
default:
// This should actually never happen.
isc_throw(Unexpected, "invalid DUID type used " << getType()
<< " to create a new DUID");
}
// Save the newly created DUID.
current_duid_ = factory.get();
// Return generated DUID.
return (current_duid_);
}
ElementPtr
CfgDUID::toElement() const {
ElementPtr result = Element::createMap();
// Set user context
contextToElement(result);
// The type item is required
std::string duid_type = "LLT";
switch (type_) {
case DUID::DUID_LLT:
break;
case DUID::DUID_EN:
duid_type = "EN";
break;
case DUID::DUID_LL:
duid_type = "LL";
break;
default:
isc_throw(ToElementError, "invalid DUID type: " << getType());
break;
}
result->set("type", Element::create(duid_type));
// Set the identifier
result->set("identifier",
Element::create(util::encode::encodeHex(identifier_)));
// Set the hardware type
result->set("htype", Element::create(htype_));
// Set the time
result->set("time", Element::create(static_cast<long long>(time_)));
// Set the enterprise id
result->set("enterprise-id",
Element::create(static_cast<long long>(enterprise_id_)));
// Set the persistence flag
result->set("persist", Element::create(persist_));
return (result);
}
}
}
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