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// Copyright (C) 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 <asiolink/addr_utilities.h>
#include <asiolink/io_address.h>
#include <dhcpsrv/ip_range.h>
#include <exceptions/exceptions.h>
using namespace isc::asiolink;
namespace isc {
namespace dhcp {
AddressRange::AddressRange(const IOAddress& start, const IOAddress& end)
: start_(start), end_(end) {
// Two IPv4 or two IPv6 addresses are expected as range boundaries.
if (start_.getFamily() != end_.getFamily()) {
isc_throw(BadValue, "address range boundaries must have the same type: " << start_
<< ":" << end_);
}
// The start must be lower or equal the end.
if (end_ < start_) {
isc_throw(BadValue, "invalid address range boundaries " << start_ << ":" << end_);
}
}
PrefixRange::PrefixRange(const asiolink::IOAddress& prefix, const uint8_t length, const uint8_t delegated)
: start_(prefix), end_(IOAddress::IPV6_ZERO_ADDRESS()), prefix_length_(length),
delegated_length_(delegated) {
if (!start_.isV6()) {
isc_throw(BadValue, "IPv6 prefix required for prefix delegation range but "
<< start_ << " was specified");
}
if (delegated_length_ < prefix_length_) {
isc_throw(BadValue, "delegated length " << static_cast<int>(delegated_length_)
<< " must not be lower than prefix length " << static_cast<int>(length));
}
if ((prefix_length_ > 128) || (delegated_length_ > 128)) {
isc_throw(BadValue, "delegated length " << static_cast<int>(delegated_length_)
<< " and prefix length " << static_cast<int>(length)
<< " must not be greater than 128");
}
// Now calculate the last prefix in the range.
auto prefixes_num = prefixesInRange(prefix_length_, delegated_length_);
uint64_t addrs_in_prefix = static_cast<uint64_t>(1) << (128 - delegated_length_);
end_ = offsetAddress(prefix, (prefixes_num - 1) * addrs_in_prefix);
}
PrefixRange::PrefixRange(const asiolink::IOAddress& start, const asiolink::IOAddress& end,
const uint8_t delegated)
: start_(start), end_(end), prefix_length_(0), delegated_length_(delegated) {
if (!start_.isV6() || !end_.isV6()) {
isc_throw(BadValue, "IPv6 prefix required for prefix delegation range but "
<< start_ << ":" << end_ << " was specified");
}
// The start must be lower or equal the end.
if (end_ < start_) {
isc_throw(BadValue, "invalid address range boundaries " << start_ << ":" << end_);
}
if (delegated_length_ > 128) {
isc_throw(BadValue, "delegated length " << static_cast<int>(delegated_length_)
<< " must not be greater than 128");
}
}
} // end of namespace isc::dhcp
} // end of namespace isc
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