1/*
2 * Copyright 2014-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#pragma once
18
19#include <sys/types.h>
20
21#include <string>
22
23#include <folly/portability/Sockets.h>
24
25namespace folly {
26namespace detail {
27
28std::string familyNameStrDefault(sa_family_t family);
29
30inline std::string familyNameStr(sa_family_t family) {
31 switch (family) {
32 case AF_INET:
33 return "AF_INET";
34 case AF_INET6:
35 return "AF_INET6";
36 case AF_UNSPEC:
37 return "AF_UNSPEC";
38 case AF_UNIX:
39 return "AF_UNIX";
40 default:
41 return familyNameStrDefault(family);
42 }
43}
44
45[[noreturn]] void getNthMSBitImplThrow(size_t bitCount, sa_family_t family);
46
47template <typename IPAddrType>
48inline bool
49getNthMSBitImpl(const IPAddrType& ip, size_t bitIndex, sa_family_t family) {
50 if (bitIndex >= ip.bitCount()) {
51 getNthMSBitImplThrow(ip.bitCount(), family);
52 }
53 // Underlying bytes are in n/w byte order
54 return (ip.getNthMSByte(bitIndex / 8) & (0x80 >> (bitIndex % 8))) != 0;
55}
56} // namespace detail
57} // namespace folly
58