1/*
2 * Copyright (C) 2015 The Android Open Source Project
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#ifndef ANDROID_IP_PREFIX_H
18#define ANDROID_IP_PREFIX_H
19
20#include <netinet/in.h>
21
22#include <binder/Parcelable.h>
23#include <utils/String16.h>
24#include <utils/StrongPointer.h>
25
26namespace android {
27
28namespace net {
29
30/*
31 * C++ implementation of the Java class android.net.IpPrefix
32 */
33class IpPrefix : public Parcelable {
34public:
35    IpPrefix() = default;
36    virtual ~IpPrefix() = default;
37    IpPrefix(const IpPrefix& prefix) = default;
38
39    IpPrefix(const struct in6_addr& addr, int32_t plen):
40        mUnion(addr), mPrefixLength(plen), mIsIpv6(true) { }
41
42    IpPrefix(const struct in_addr& addr, int32_t plen):
43        mUnion(addr), mPrefixLength(plen), mIsIpv6(false) { }
44
45    bool getAddressAsIn6Addr(struct in6_addr* addr) const;
46    bool getAddressAsInAddr(struct in_addr* addr) const;
47
48    const struct in6_addr& getAddressAsIn6Addr() const;
49    const struct in_addr& getAddressAsInAddr() const;
50
51    bool isIpv6() const;
52    bool isIpv4() const;
53
54    int32_t getPrefixLength() const;
55
56    void setAddress(const struct in6_addr& addr);
57    void setAddress(const struct in_addr& addr);
58
59    void setPrefixLength(int32_t prefix);
60
61    friend bool operator==(const IpPrefix& lhs, const IpPrefix& rhs);
62
63    friend bool operator!=(const IpPrefix& lhs, const IpPrefix& rhs) {
64        return !(lhs == rhs);
65    }
66
67public:
68    // Overrides
69    status_t writeToParcel(Parcel* parcel) const override;
70    status_t readFromParcel(const Parcel* parcel) override;
71
72private:
73    union InternalUnion {
74        InternalUnion() = default;
75        InternalUnion(const struct in6_addr &addr):mIn6Addr(addr) { };
76        InternalUnion(const struct in_addr &addr):mInAddr(addr) { };
77        struct in6_addr mIn6Addr;
78        struct in_addr mInAddr;
79    } mUnion;
80    int32_t mPrefixLength;
81    bool mIsIpv6;
82};
83
84}  // namespace net
85
86}  // namespace android
87
88#endif  // ANDROID_IP_PREFIX_H
89