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// Copyright (C) 2012-2023 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 <asiolink/addr_utilities.h>
#include <dhcpsrv/lease.h>
#include <util/pointer_util.h>
#include <util/strutil.h>
#include <boost/algorithm/string.hpp>
#include <boost/scoped_ptr.hpp>
#include <sstream>
#include <iostream>
using namespace isc::asiolink;
using namespace isc::util;
using namespace isc::data;
using namespace std;
namespace isc {
namespace dhcp {
const uint32_t Lease::STATE_DEFAULT = 0x0;
const uint32_t Lease::STATE_DECLINED = 0x1;
const uint32_t Lease::STATE_EXPIRED_RECLAIMED = 0x2;
std::string
Lease::lifetimeToText(uint32_t lifetime) {
ostringstream repr;
if (lifetime == INFINITY_LFT) {
repr << "infinity";
} else {
repr << lifetime;
}
return repr.str();
}
Lease::Lease(const isc::asiolink::IOAddress& addr,
uint32_t valid_lft, SubnetID subnet_id, time_t cltt,
const bool fqdn_fwd, const bool fqdn_rev,
const std::string& hostname, const HWAddrPtr& hwaddr)
: addr_(addr), valid_lft_(valid_lft), current_valid_lft_(valid_lft),
reuseable_valid_lft_(0),
cltt_(cltt), current_cltt_(cltt), subnet_id_(subnet_id), pool_id_(0),
hostname_(boost::algorithm::to_lower_copy(hostname)), fqdn_fwd_(fqdn_fwd),
fqdn_rev_(fqdn_rev), hwaddr_(hwaddr), state_(STATE_DEFAULT) {
}
std::string
Lease::typeToText(Lease::Type type) {
switch (type) {
case Lease::TYPE_V4:
return string("V4");
case Lease::TYPE_NA:
return string("IA_NA");
case Lease::TYPE_TA:
return string("IA_TA");
case Lease::TYPE_PD:
return string("IA_PD");
break;
default: {
stringstream tmp;
tmp << "unknown (" << type << ")";
return (tmp.str());
}
}
}
Lease::Type
Lease::textToType(const std::string& text) {
if (text == "V4") {
return (TYPE_V4);
} else if (text == "IA_NA") {
return (TYPE_NA);
} else if (text == "IA_TA") {
return (TYPE_TA);
} else if (text == "IA_PD") {
return (TYPE_PD);
}
isc_throw(BadValue, "unsupported lease type " << text);
}
std::string
Lease::basicStatesToText(const uint32_t state) {
switch (state) {
case STATE_DEFAULT:
return ("default");
case STATE_DECLINED:
return ("declined");
case STATE_EXPIRED_RECLAIMED:
return ("expired-reclaimed");
default:
// The default case will be handled further on
;
}
std::ostringstream s;
s << "unknown (" << state << ")";
return s.str();
}
bool
Lease::expired() const {
return ((valid_lft_ != INFINITY_LFT) && (getExpirationTime() < time(NULL)));
}
bool
Lease::stateExpiredReclaimed() const {
return (state_ == STATE_EXPIRED_RECLAIMED);
}
bool
Lease::stateDeclined() const {
return (state_ == STATE_DECLINED);
}
int64_t
Lease::getExpirationTime() const {
return (static_cast<int64_t>(cltt_) + valid_lft_);
}
bool
Lease::hasIdenticalFqdn(const Lease& other) const {
return (boost::algorithm::iequals(hostname_, other.hostname_) &&
fqdn_fwd_ == other.fqdn_fwd_ &&
fqdn_rev_ == other.fqdn_rev_);
}
void
Lease::fromElementCommon(const LeasePtr& lease, const data::ConstElementPtr& element) {
if (!element) {
isc_throw(BadValue, "parsed lease data is null");
}
if (element->getType() != Element::map) {
isc_throw(BadValue, "parsed lease data is not a JSON map");
}
if (!lease) {
isc_throw(Unexpected, "pointer to parsed lease is null");
}
// IP address.
ConstElementPtr ip_address = element->get("ip-address");
if (!ip_address || (ip_address->getType() != Element::string)) {
isc_throw(BadValue, "ip-address not present in the parsed lease"
" or it is not a string");
}
boost::scoped_ptr<asiolink::IOAddress> io_address;
try {
io_address.reset(new asiolink::IOAddress(ip_address->stringValue()));
} catch (const std::exception& ex) {
isc_throw(BadValue, "invalid IP address " << ip_address->stringValue()
<< " in the parsed lease");
}
lease->addr_ = *io_address;
// Subnet identifier.
ConstElementPtr subnet_id = element->get("subnet-id");
if (!subnet_id || (subnet_id->getType() != Element::integer)) {
isc_throw(BadValue, "subnet-id not present in the parsed lease"
" or it is not an integer");
}
if (subnet_id->intValue() <= 0) {
isc_throw(BadValue, "subnet-id " << subnet_id->intValue() << " is not"
<< " a positive integer");
} else if (subnet_id->intValue() > numeric_limits<uint32_t>::max()) {
isc_throw(BadValue, "subnet-id " << subnet_id->intValue() << " is not"
<< " a 32 bit unsigned integer");
}
lease->subnet_id_ = SubnetID(subnet_id->intValue());
// Pool identifier.
ConstElementPtr pool_id = element->get("pool-id");
if (pool_id) {
if (pool_id->getType() != Element::integer) {
isc_throw(BadValue, "pool-id is not an integer");
}
if (pool_id->intValue() <= 0) {
isc_throw(BadValue, "pool-id " << pool_id->intValue() << " is not"
<< " a positive integer");
} else if (pool_id->intValue() > numeric_limits<uint32_t>::max()) {
isc_throw(BadValue, "pool-id " << pool_id->intValue() << " is not"
<< " a 32 bit unsigned integer");
}
lease->pool_id_ = pool_id->intValue();
}
// Hardware address.
ConstElementPtr hw_address = element->get("hw-address");
if (hw_address) {
if (hw_address->getType() != Element::string) {
isc_throw(BadValue, "hw-address is not a string in the parsed lease");
}
try {
HWAddr parsed_hw_address = HWAddr::fromText(hw_address->stringValue());
lease->hwaddr_.reset(new HWAddr(parsed_hw_address.hwaddr_, HTYPE_ETHER));
} catch (const std::exception& ex) {
isc_throw(BadValue, "invalid hardware address "
<< hw_address->stringValue() << " in the parsed lease");
}
}
// cltt
ConstElementPtr cltt = element->get("cltt");
if (!cltt || (cltt->getType() != Element::integer)) {
isc_throw(BadValue, "cltt is not present in the parsed lease"
" or it is not an integer");
}
if (cltt->intValue() <= 0) {
isc_throw(BadValue, "cltt " << cltt->intValue() << " is not a"
" positive integer in the parsed lease");
}
lease->cltt_ = static_cast<time_t>(cltt->intValue());
// valid lifetime
ConstElementPtr valid_lifetime = element->get("valid-lft");
if (!valid_lifetime || (valid_lifetime->getType() != Element::integer)) {
isc_throw(BadValue, "valid-lft is not present in the parsed lease"
" or it is not an integer");
}
if (valid_lifetime->intValue() < 0) {
isc_throw(BadValue, "valid-lft " << valid_lifetime->intValue()
<< " is negative in the parsed lease");
}
lease->valid_lft_ = valid_lifetime->intValue();
// fqdn-fwd
ConstElementPtr fqdn_fwd = element->get("fqdn-fwd");
if (!fqdn_fwd || fqdn_fwd->getType() != Element::boolean) {
isc_throw(BadValue, "fqdn-fwd is not present in the parsed lease"
" or it is not a boolean value");
}
lease->fqdn_fwd_ = fqdn_fwd->boolValue();
// fqdn-fwd
ConstElementPtr fqdn_rev = element->get("fqdn-rev");
if (!fqdn_rev || (fqdn_rev->getType() != Element::boolean)) {
isc_throw(BadValue, "fqdn-rev is not present in the parsed lease"
" or it is not a boolean value");
}
lease->fqdn_rev_ = fqdn_rev->boolValue();
// hostname
ConstElementPtr hostname = element->get("hostname");
if (!hostname || (hostname->getType() != Element::string)) {
isc_throw(BadValue, "hostname is not present in the parsed lease"
" or it is not a string value");
}
lease->hostname_ = hostname->stringValue();
boost::algorithm::to_lower(lease->hostname_);
// state
ConstElementPtr state = element->get("state");
if (!state || (state->getType() != Element::integer)) {
isc_throw(BadValue, "state is not present in the parsed lease"
" or it is not an integer");
}
if ((state->intValue() < 0) || (state->intValue() > Lease::STATE_EXPIRED_RECLAIMED)) {
isc_throw(BadValue, "state " << state->intValue()
<< " must be in range [0.."
<< Lease::STATE_EXPIRED_RECLAIMED << "]");
}
lease->state_ = state->intValue();
// user context
ConstElementPtr ctx = element->get("user-context");
if (ctx) {
if (ctx->getType() != Element::map) {
isc_throw(BadValue, "user context is not a map");
}
lease->setContext(ctx);
}
lease->updateCurrentExpirationTime();
}
void
Lease::updateCurrentExpirationTime() {
Lease::syncCurrentExpirationTime(*this, *this);
}
void
Lease::syncCurrentExpirationTime(const Lease& from, Lease& to) {
to.current_cltt_ = from.cltt_;
to.current_valid_lft_ = from.valid_lft_;
}
Lease4::Lease4(const isc::asiolink::IOAddress& address,
const HWAddrPtr& hw_address,
const ClientIdPtr& client_id,
const uint32_t valid_lifetime,
const time_t cltt,
const SubnetID subnet_id,
const bool fqdn_fwd,
const bool fqdn_rev,
const std::string& hostname)
: Lease(address, valid_lifetime, subnet_id, cltt, fqdn_fwd,
fqdn_rev, hostname, hw_address),
client_id_(client_id), remote_id_(), relay_id_() {
}
Lease4::Lease4() : Lease(0, 0, 0, 0, false, false, "", HWAddrPtr()) {
}
std::string
Lease4::statesToText(const uint32_t state) {
return (Lease::basicStatesToText(state));
}
const std::vector<uint8_t>&
Lease4::getClientIdVector() const {
if (!client_id_) {
static std::vector<uint8_t> empty_vec;
return (empty_vec);
}
return (client_id_->getClientId());
}
const std::vector<uint8_t>&
Lease::getHWAddrVector() const {
if (!hwaddr_) {
static std::vector<uint8_t> empty_vec;
return (empty_vec);
}
return (hwaddr_->hwaddr_);
}
bool
Lease4::belongsToClient(const HWAddrPtr& hw_address,
const ClientIdPtr& client_id) const {
// If client id matches, lease matches.
if (equalValues(client_id, client_id_)) {
return (true);
} else if (!client_id || !client_id_) {
// If client id is unspecified, use HW address.
if (equalValues(hw_address, hwaddr_)) {
return (true);
}
}
return (false);
}
void
Lease4::decline(uint32_t probation_period) {
hwaddr_.reset(new HWAddr());
client_id_.reset();
cltt_ = time(NULL);
hostname_ = string("");
fqdn_fwd_ = false;
fqdn_rev_ = false;
state_ = STATE_DECLINED;
valid_lft_ = probation_period;
}
isc::data::ElementPtr
Lease4::toElement() const {
// Prepare the map
ElementPtr map = Element::createMap();
contextToElement(map);
map->set("ip-address", Element::create(addr_.toText()));
map->set("subnet-id", Element::create(static_cast<long int>(subnet_id_)));
if (pool_id_) {
map->set("pool-id", Element::create(static_cast<long int>(pool_id_)));
}
map->set("hw-address", Element::create(hwaddr_->toText(false)));
if (client_id_) {
map->set("client-id", Element::create(client_id_->toText()));
}
map->set("cltt", Element::create(cltt_));
map->set("valid-lft", Element::create(static_cast<long int>(valid_lft_)));
map->set("fqdn-fwd", Element::create(fqdn_fwd_));
map->set("fqdn-rev", Element::create(fqdn_rev_));
map->set("hostname", Element::create(hostname_));
map->set("state", Element::create(static_cast<int>(state_)));
return (map);
}
Lease4Ptr
Lease4::fromElement(const ConstElementPtr& element) {
Lease4Ptr lease(new Lease4());
// Extract common lease properties into the lease.
fromElementCommon(boost::dynamic_pointer_cast<Lease>(lease), element);
// Validate ip-address, which must be an IPv4 address.
if (!lease->addr_.isV4()) {
isc_throw(BadValue, "address " << lease->addr_ << " it not an IPv4 address");
}
// Make sure the hw-addres is present.
if (!lease->hwaddr_) {
isc_throw(BadValue, "hw-address not present in the parsed lease");
}
// Client identifier is IPv4 specific.
ConstElementPtr client_id = element->get("client-id");
if (client_id) {
if (client_id->getType() != Element::string) {
isc_throw(BadValue, "client identifier is not a string in the"
" parsed lease");
}
try {
lease->client_id_ = ClientId::fromText(client_id->stringValue());
} catch (const std::exception& ex) {
isc_throw(BadValue, "invalid client identifier "
<< client_id->stringValue() << " in the parsed lease");
}
}
return (lease);
}
Lease6::Lease6(Lease::Type type, const isc::asiolink::IOAddress& addr,
DuidPtr duid, uint32_t iaid, uint32_t preferred, uint32_t valid,
SubnetID subnet_id, const HWAddrPtr& hwaddr, uint8_t prefixlen)
: Lease(addr, valid, subnet_id, 0/*cltt*/, false, false, "", hwaddr),
type_(type), prefixlen_(prefixlen), iaid_(iaid), duid_(duid),
preferred_lft_(preferred), reuseable_preferred_lft_(0),
extended_info_action_(ExtendedInfoAction::ACTION_IGNORE) {
if (!duid) {
isc_throw(BadValue, "DUID is mandatory for an IPv6 lease");
}
if (prefixlen != 128) {
if (type != Lease::TYPE_PD) {
isc_throw(BadValue, "prefixlen must be 128 for non prefix type");
}
}
cltt_ = time(NULL);
current_cltt_ = cltt_;
}
Lease6::Lease6(Lease::Type type, const isc::asiolink::IOAddress& addr,
DuidPtr duid, uint32_t iaid, uint32_t preferred, uint32_t valid,
SubnetID subnet_id, const bool fqdn_fwd, const bool fqdn_rev,
const std::string& hostname, const HWAddrPtr& hwaddr,
uint8_t prefixlen)
: Lease(addr, valid, subnet_id, 0/*cltt*/,
fqdn_fwd, fqdn_rev, hostname, hwaddr),
type_(type), prefixlen_(prefixlen), iaid_(iaid), duid_(duid),
preferred_lft_(preferred), reuseable_preferred_lft_(0),
extended_info_action_(ExtendedInfoAction::ACTION_IGNORE) {
if (!duid) {
isc_throw(BadValue, "DUID is mandatory for an IPv6 lease");
}
if (prefixlen != 128) {
if (type != Lease::TYPE_PD) {
isc_throw(BadValue, "prefixlen must be 128 for non prefix type");
}
}
cltt_ = time(NULL);
current_cltt_ = cltt_;
}
Lease6::Lease6()
: Lease(isc::asiolink::IOAddress("::"), 0, 0, 0, false, false, "",
HWAddrPtr()), type_(TYPE_NA), prefixlen_(0), iaid_(0),
duid_(DuidPtr()), preferred_lft_(0), reuseable_preferred_lft_(0),
extended_info_action_(ExtendedInfoAction::ACTION_IGNORE) {
}
std::string
Lease6::statesToText(const uint32_t state) {
return (Lease::basicStatesToText(state));
}
const std::vector<uint8_t>&
Lease6::getDuidVector() const {
if (!duid_) {
static std::vector<uint8_t> empty_vec;
return (empty_vec);
}
return (duid_->getDuid());
}
void
Lease6::decline(uint32_t probation_period) {
hwaddr_.reset();
duid_.reset(new DUID(DUID::EMPTY()));
preferred_lft_ = 0;
valid_lft_ = probation_period;
cltt_ = time(NULL);
hostname_ = string("");
fqdn_fwd_ = false;
fqdn_rev_ = false;
state_ = STATE_DECLINED;
}
std::string
Lease6::toText() const {
ostringstream stream;
/// @todo: print out DUID
stream << "Type: " << typeToText(type_) << "("
<< static_cast<int>(type_) << ")\n"
<< "Address: " << addr_ << "\n"
<< "Prefix length: " << static_cast<int>(prefixlen_) << "\n"
<< "IAID: " << iaid_ << "\n"
<< "Pref life: " << lifetimeToText(preferred_lft_) << "\n"
<< "Valid life: " << lifetimeToText(valid_lft_) << "\n"
<< "Cltt: " << cltt_ << "\n"
<< "DUID: " << (duid_?duid_->toText():"(none)") << "\n"
<< "Hardware addr: " << (hwaddr_?hwaddr_->toText(false):"(none)") << "\n"
<< "Subnet ID: " << subnet_id_ << "\n"
<< "Pool ID: " << pool_id_ << "\n"
<< "State: " << statesToText(state_) << "\n";
if (getContext()) {
stream << "User context: " << getContext()->str() << "\n";
}
return (stream.str());
}
std::string
Lease4::toText() const {
ostringstream stream;
stream << "Address: " << addr_ << "\n"
<< "Valid life: " << lifetimeToText(valid_lft_) << "\n"
<< "Cltt: " << cltt_ << "\n"
<< "Hardware addr: " << (hwaddr_ ? hwaddr_->toText(false) : "(none)") << "\n"
<< "Client id: " << (client_id_ ? client_id_->toText() : "(none)") << "\n"
<< "Subnet ID: " << subnet_id_ << "\n"
<< "Pool ID: " << pool_id_ << "\n"
<< "State: " << statesToText(state_) << "\n"
<< "Relay ID: " << (relay_id_.empty() ? "(none)" :
str::dumpAsHex(&relay_id_[0], relay_id_.size())) << "\n"
<< "Remote ID: " << (remote_id_.empty() ? "(none)" :
str::dumpAsHex(&remote_id_[0], remote_id_.size())) << "\n";
if (getContext()) {
stream << "User context: " << getContext()->str() << "\n";
}
return (stream.str());
}
bool
Lease4::operator==(const Lease4& other) const {
return (nullOrEqualValues(hwaddr_, other.hwaddr_) &&
nullOrEqualValues(client_id_, other.client_id_) &&
addr_ == other.addr_ &&
subnet_id_ == other.subnet_id_ &&
pool_id_ == other.pool_id_ &&
valid_lft_ == other.valid_lft_ &&
current_valid_lft_ == other.current_valid_lft_ &&
reuseable_valid_lft_ == other.reuseable_valid_lft_ &&
cltt_ == other.cltt_ &&
current_cltt_ == other.current_cltt_ &&
hostname_ == other.hostname_ &&
fqdn_fwd_ == other.fqdn_fwd_ &&
fqdn_rev_ == other.fqdn_rev_ &&
state_ == other.state_ &&
nullOrEqualValues(getContext(), other.getContext()));
}
bool
Lease6::operator==(const Lease6& other) const {
return (nullOrEqualValues(duid_, other.duid_) &&
nullOrEqualValues(hwaddr_, other.hwaddr_) &&
addr_ == other.addr_ &&
type_ == other.type_ &&
prefixlen_ == other.prefixlen_ &&
iaid_ == other.iaid_ &&
preferred_lft_ == other.preferred_lft_ &&
reuseable_preferred_lft_ == other.reuseable_preferred_lft_ &&
valid_lft_ == other.valid_lft_ &&
current_valid_lft_ == other.current_valid_lft_ &&
reuseable_valid_lft_ == other.reuseable_valid_lft_ &&
cltt_ == other.cltt_ &&
current_cltt_ == other.current_cltt_ &&
subnet_id_ == other.subnet_id_ &&
pool_id_ == other.pool_id_ &&
hostname_ == other.hostname_ &&
fqdn_fwd_ == other.fqdn_fwd_ &&
fqdn_rev_ == other.fqdn_rev_ &&
state_ == other.state_ &&
nullOrEqualValues(getContext(), other.getContext()));
}
isc::data::ElementPtr
Lease6::toElement() const {
// Prepare the map
ElementPtr map = Element::createMap();
contextToElement(map);
map->set("ip-address", Element::create(addr_.toText()));
map->set("type", Element::create(typeToText(type_)));
if (type_ == Lease::TYPE_PD) {
map->set("prefix-len", Element::create(prefixlen_));
}
map->set("iaid", Element::create(static_cast<long int>(iaid_)));
map->set("duid", Element::create(duid_->toText()));
map->set("subnet-id", Element::create(static_cast<long int>(subnet_id_)));
if (pool_id_) {
map->set("pool-id", Element::create(static_cast<long int>(pool_id_)));
}
map->set("cltt", Element::create(cltt_));
map->set("preferred-lft", Element::create(static_cast<long int>(preferred_lft_)));
map->set("valid-lft", Element::create(static_cast<long int>(valid_lft_)));
map->set("fqdn-fwd", Element::create(fqdn_fwd_));
map->set("fqdn-rev", Element::create(fqdn_rev_));
map->set("hostname", Element::create(hostname_));
if (hwaddr_) {
map->set("hw-address", Element::create(hwaddr_->toText(false)));
}
map->set("state", Element::create(static_cast<long int>(state_)));
return (map);
}
Lease6Ptr
Lease6::fromElement(const data::ConstElementPtr& element) {
Lease6Ptr lease(new Lease6());
// Extract common lease properties into the lease.
fromElementCommon(boost::dynamic_pointer_cast<Lease>(lease), element);
// Validate ip-address, which must be an IPv6 address.
if (!lease->addr_.isV6()) {
isc_throw(BadValue, "address " << lease->addr_ << " it not an IPv6 address");
}
// lease type
ConstElementPtr lease_type = element->get("type");
if (!lease_type || (lease_type->getType() != Element::string)) {
isc_throw(BadValue, "type is not present in the parsed lease"
" or it is not a string value");
}
lease->type_ = textToType(lease_type->stringValue());
// prefix length
if (lease->type_ != Lease::TYPE_PD) {
lease->prefixlen_ = 128;
} else {
ConstElementPtr prefix_len = element->get("prefix-len");
if (!prefix_len || (prefix_len->getType() != Element::integer)) {
isc_throw(BadValue, "prefix-len is not present in the parsed lease"
" or it is not an integer");
}
if ((prefix_len->intValue() < 1) || (prefix_len->intValue() > 128)) {
isc_throw(BadValue, "prefix-len " << prefix_len->intValue()
<< " must be in range of [1..128]");
}
lease->prefixlen_ = static_cast<uint8_t>(prefix_len->intValue());
}
// IAID
ConstElementPtr iaid = element->get("iaid");
if (!iaid || (iaid->getType() != Element::integer)) {
isc_throw(BadValue, "iaid is not present in the parsed lease"
" or it is not an integer");
}
if (iaid->intValue() < 0) {
isc_throw(BadValue, "iaid " << iaid->intValue() << " must not be negative");
}
lease->iaid_ = static_cast<uint32_t>(iaid->intValue());
// DUID
ConstElementPtr duid = element->get("duid");
if (!duid || (duid->getType() != Element::string)) {
isc_throw(BadValue, "duid not present in the parsed lease"
" or it is not a string");
}
try {
DUID parsed_duid = DUID::fromText(duid->stringValue());
lease->duid_.reset(new DUID(parsed_duid.getDuid()));
} catch (const std::exception& ex) {
isc_throw(BadValue, "invalid DUID "
<< duid->stringValue() << " in the parsed lease");
}
// preferred lifetime
ConstElementPtr preferred_lft = element->get("preferred-lft");
if (!preferred_lft || (preferred_lft->getType() != Element::integer)) {
isc_throw(BadValue, "preferred-lft is not present in the parsed lease"
" or is not an integer");
}
if (preferred_lft->intValue() < 0) {
isc_throw(BadValue, "preferred-lft " << preferred_lft->intValue()
<< " must not be negative");
}
lease->preferred_lft_ = static_cast<uint32_t>(preferred_lft->intValue());
return (lease);
}
std::ostream&
operator<<(std::ostream& os, const Lease& lease) {
os << lease.toText();
return (os);
}
} // namespace isc::dhcp
} // namespace isc
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