1 // Copyright 2023 The Chromium Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //     https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef BSSL_PKI_IP_UTIL_H_
16 #define BSSL_PKI_IP_UTIL_H_
17 
18 #include <openssl/base.h>
19 
20 #include "input.h"
21 
22 BSSL_NAMESPACE_BEGIN
23 
24 inline constexpr size_t kIPv4AddressSize = 4;
25 inline constexpr size_t kIPv6AddressSize = 16;
26 
27 // Returns whether `mask` is a valid netmask. I.e., whether it is the length of
28 // an IPv4 or IPv6 address, and is some number of ones, followed by some number
29 // of zeros.
30 OPENSSL_EXPORT bool IsValidNetmask(der::Input mask);
31 
32 // Returns whether `addr1` and `addr2` are equal under the netmask `mask`.
33 OPENSSL_EXPORT bool IPAddressMatchesWithNetmask(der::Input addr1,
34                                                 der::Input addr2,
35                                                 der::Input mask);
36 
37 BSSL_NAMESPACE_END
38 
39 #endif  // BSSL_PKI_IP_UTIL_H_
40