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// Copyright (C) 2014-2015 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
#include <dhcpsrv/host.h>
#include <util/strutil.h>
#include <exceptions/exceptions.h>
#include <sstream>
namespace isc {
namespace dhcp {
IPv6Resrv::IPv6Resrv(const Type& type,
const asiolink::IOAddress& prefix,
const uint8_t prefix_len)
: type_(type), prefix_(asiolink::IOAddress("::")), prefix_len_(128) {
// Validate and set the actual values.
set(type, prefix, prefix_len);
}
void
IPv6Resrv::set(const Type& type, const asiolink::IOAddress& prefix,
const uint8_t prefix_len) {
if (!prefix.isV6() || prefix.isV6Multicast()) {
isc_throw(isc::BadValue, "invalid prefix '" << prefix
<< "' for new IPv6 reservation");
} else if (prefix_len > 128) {
isc_throw(isc::BadValue, "invalid prefix length '"
<< static_cast<int>(prefix_len)
<< "' for new IPv6 reservation");
} else if ((type == TYPE_NA) && (prefix_len != 128)) {
isc_throw(isc::BadValue, "invalid prefix length '"
<< static_cast<int>(prefix_len)
<< "' for reserved IPv6 address, expected 128");
}
type_ = type;
prefix_ = prefix;
prefix_len_ = prefix_len;
}
std::string
IPv6Resrv::toText() const {
std::ostringstream s;
s << prefix_;
// For PD, append prefix length.
if (getType() == TYPE_PD) {
s << "/" << static_cast<int>(prefix_len_);
}
return (s.str());
}
bool
IPv6Resrv::operator==(const IPv6Resrv& other) const {
return (type_ == other.type_ &&
prefix_ == other.prefix_ &&
prefix_len_ == other.prefix_len_);
}
bool
IPv6Resrv::operator!=(const IPv6Resrv& other) const {
return (!operator==(other));
}
Host::Host(const uint8_t* identifier, const size_t identifier_len,
const IdentifierType& identifier_type,
const SubnetID ipv4_subnet_id, const SubnetID ipv6_subnet_id,
const asiolink::IOAddress& ipv4_reservation,
const std::string& hostname,
const std::string& dhcp4_client_classes,
const std::string& dhcp6_client_classes)
: hw_address_(), duid_(), ipv4_subnet_id_(ipv4_subnet_id),
ipv6_subnet_id_(ipv6_subnet_id),
ipv4_reservation_(asiolink::IOAddress("0.0.0.0")),
hostname_(hostname), dhcp4_client_classes_(dhcp4_client_classes),
dhcp6_client_classes_(dhcp6_client_classes) {
// Initialize HWAddr or DUID
setIdentifier(identifier, identifier_len, identifier_type);
// Validate and set IPv4 address reservation.
setIPv4Reservation(ipv4_reservation);
}
Host::Host(const std::string& identifier, const std::string& identifier_name,
const SubnetID ipv4_subnet_id, const SubnetID ipv6_subnet_id,
const asiolink::IOAddress& ipv4_reservation,
const std::string& hostname,
const std::string& dhcp4_client_classes,
const std::string& dhcp6_client_classes)
: hw_address_(), duid_(), ipv4_subnet_id_(ipv4_subnet_id),
ipv6_subnet_id_(ipv6_subnet_id),
ipv4_reservation_(asiolink::IOAddress("0.0.0.0")),
hostname_(hostname), dhcp4_client_classes_(dhcp4_client_classes),
dhcp6_client_classes_(dhcp6_client_classes) {
// Initialize HWAddr or DUID
setIdentifier(identifier, identifier_name);
// Validate and set IPv4 address reservation.
setIPv4Reservation(ipv4_reservation);
}
const std::vector<uint8_t>&
Host::getIdentifier() const {
if (hw_address_) {
return (hw_address_->hwaddr_);
} else if (duid_) {
return (duid_->getDuid());
}
static std::vector<uint8_t> empty_vector;
return (empty_vector);
}
Host::IdentifierType
Host::getIdentifierType() const {
if (hw_address_) {
return (IDENT_HWADDR);
}
return (IDENT_DUID);
}
void
Host::setIdentifier(const uint8_t* identifier, const size_t len,
const IdentifierType& type) {
switch (type) {
case IDENT_HWADDR:
hw_address_ = HWAddrPtr(new HWAddr(identifier, len, HTYPE_ETHER));
duid_.reset();
break;
case IDENT_DUID:
duid_ = DuidPtr(new DUID(identifier, len));
hw_address_.reset();
break;
default:
isc_throw(isc::BadValue, "invalid client identifier type '"
<< static_cast<int>(type) << "' when creating host "
" instance");
}
}
void
Host::setIdentifier(const std::string& identifier, const std::string& name) {
if (name == "hw-address") {
hw_address_ = HWAddrPtr(new HWAddr(HWAddr::fromText(identifier)));
duid_.reset();
} else if (name == "duid") {
duid_ = DuidPtr(new DUID(DUID::fromText(identifier)));
hw_address_.reset();
} else {
isc_throw(isc::BadValue, "invalid client identifier type '"
<< name << "' when creating host instance");
}
}
void
Host::setIPv4Reservation(const asiolink::IOAddress& address) {
if (!address.isV4()) {
isc_throw(isc::BadValue, "address '" << address << "' is not a valid"
" IPv4 address");
}
ipv4_reservation_ = address;
}
void
Host::addReservation(const IPv6Resrv& reservation) {
// Check if it is not duplicating existing reservation.
if (hasReservation(reservation)) {
isc_throw(isc::InvalidOperation, "failed on attempt to add a duplicated"
" host reservation for " << reservation.toText());
}
// Add it.
ipv6_reservations_.insert(IPv6ResrvTuple(reservation.getType(),
reservation));
}
IPv6ResrvRange
Host::getIPv6Reservations(const IPv6Resrv::Type& type) const {
return (ipv6_reservations_.equal_range(type));
}
IPv6ResrvRange
Host::getIPv6Reservations() const {
return (IPv6ResrvRange(ipv6_reservations_.begin(),
ipv6_reservations_.end()));
}
bool
Host::hasIPv6Reservation() const {
return (!ipv6_reservations_.empty());
}
bool
Host::hasReservation(const IPv6Resrv& reservation) const {
IPv6ResrvRange reservations = getIPv6Reservations(reservation.getType());
if (std::distance(reservations.first, reservations.second) > 0) {
for (IPv6ResrvIterator it = reservations.first;
it != reservations.second; ++it) {
if (it->second == reservation) {
return (true);
}
}
}
// No matching reservations found.
return (false);
}
void
Host::addClientClassInternal(ClientClasses& classes,
const std::string& class_name) {
std::string trimmed = util::str::trim(class_name);
if (!trimmed.empty()) {
classes.insert(ClientClass(trimmed));
}
}
std::string
Host::getIdentifierAsText() const {
std::string txt;
if (hw_address_) {
txt = "hwaddr=" + hw_address_->toText(false);
} else {
txt = "duid=";
if (duid_) {
txt += duid_->toText();
} else {
txt += "(none)";
}
}
return (txt);
}
} // end of namespace isc::dhcp
} // end of namespace isc
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