Kea  2.3.9
ip_range.cc
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1 // Copyright (C) 2020-2023 Internet Systems Consortium, Inc. ("ISC")
2 //
3 // This Source Code Form is subject to the terms of the Mozilla Public
4 // License, v. 2.0. If a copy of the MPL was not distributed with this
5 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
6 
7 #include <config.h>
9 #include <asiolink/io_address.h>
10 #include <dhcpsrv/ip_range.h>
11 #include <exceptions/exceptions.h>
12 
13 using namespace isc::asiolink;
14 
15 namespace isc {
16 namespace dhcp {
17 
18 AddressRange::AddressRange(const IOAddress& start, const IOAddress& end)
19  : start_(start), end_(end) {
20  // Two IPv4 or two IPv6 addresses are expected as range boundaries.
21  if (start_.getFamily() != end_.getFamily()) {
22  isc_throw(BadValue, "address range boundaries must have the same type: " << start_
23  << ":" << end_);
24  }
25  // The start must be lower or equal the end.
26  if (end_ < start_) {
27  isc_throw(BadValue, "invalid address range boundaries " << start_ << ":" << end_);
28  }
29 }
30 
31 PrefixRange::PrefixRange(const asiolink::IOAddress& prefix, const uint8_t length, const uint8_t delegated)
32  : start_(prefix), end_(IOAddress::IPV6_ZERO_ADDRESS()), prefix_length_(length),
33  delegated_length_(delegated) {
34  if (!start_.isV6()) {
35  isc_throw(BadValue, "IPv6 prefix required for prefix delegation range but "
36  << start_ << " was specified");
37  }
39  isc_throw(BadValue, "delegated length " << static_cast<int>(delegated_length_)
40  << " must not be lower than prefix length " << static_cast<int>(length));
41  }
42  if ((prefix_length_ > 128) || (delegated_length_ > 128)) {
43  isc_throw(BadValue, "delegated length " << static_cast<int>(delegated_length_)
44  << " and prefix length " << static_cast<int>(length)
45  << " must not be greater than 128");
46  }
47  // Now calculate the last prefix in the range.
48  end_ = lastAddrInPrefix(prefix, length);
49 }
50 
52  const uint8_t delegated)
53  : start_(start), end_(end), prefix_length_(prefixLengthFromRange(start, end)),
54  delegated_length_(delegated) {
55  if (!start_.isV6() || !end_.isV6()) {
56  isc_throw(BadValue, "IPv6 prefix required for prefix delegation range but "
57  << start_ << ":" << end_ << " was specified");
58  }
59  // The start must be lower or equal the end.
60  if (end_ < start_) {
61  isc_throw(BadValue, "invalid address range boundaries " << start_ << ":" << end_);
62  }
63  if (prefix_length_ > 128) {
64  isc_throw(BadValue, "the " << start_ << ":" << end_
65  << " does not constitute a valid prefix delegation range");
66  }
67  if (delegated_length_ > 128) {
68  isc_throw(BadValue, "delegated length " << static_cast<int>(delegated_length_)
69  << " must not be greater than 128");
70  }
71 }
72 
73 } // end of namespace isc::dhcp
74 } // end of namespace isc
A generic exception that is thrown if a parameter given to a method is considered invalid in that con...
#define isc_throw(type, stream)
A shortcut macro to insert known values into exception arguments.
Defines the logger used by the top-level component of kea-lfc.
asiolink::IOAddress start_
IP address denoting the start of the address range.
Definition: ip_range.h:18
asiolink::IOAddress end_
IP address denoting the end of the address range.
Definition: ip_range.h:20
uint8_t prefix_length_
Prefix length.
Definition: ip_range.h:39
uint8_t delegated_length_
Delegated prefix length.
Definition: ip_range.h:41
PrefixRange(const asiolink::IOAddress &prefix, const uint8_t length, const uint8_t delegated)
Constructor.
Definition: ip_range.cc:31
asiolink::IOAddress start_
IP address denoting the start of the prefix range.
Definition: ip_range.h:34
asiolink::IOAddress end_
IP address denoting the first address within the last prefix in the prefix range.
Definition: ip_range.h:37