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 #ifndef __ANDROID_VNDK__
21 
22 #include <netinet/in.h>
23 
24 #include <binder/Parcelable.h>
25 #include <utils/String16.h>
26 #include <utils/StrongPointer.h>
27 
28 namespace android {
29 
30 namespace net {
31 
32 /*
33  * C++ implementation of the Java class android.net.IpPrefix
34  */
35 class IpPrefix : public Parcelable {
36 public:
37     IpPrefix() = default;
38     virtual ~IpPrefix() = default;
39     IpPrefix(const IpPrefix& prefix) = default;
40 
IpPrefix(const struct in6_addr & addr,int32_t plen)41     IpPrefix(const struct in6_addr& addr, int32_t plen):
42         mUnion(addr), mPrefixLength(plen), mIsIpv6(true) { }
43 
IpPrefix(const struct in_addr & addr,int32_t plen)44     IpPrefix(const struct in_addr& addr, int32_t plen):
45         mUnion(addr), mPrefixLength(plen), mIsIpv6(false) { }
46 
47     bool getAddressAsIn6Addr(struct in6_addr* addr) const;
48     bool getAddressAsInAddr(struct in_addr* addr) const;
49 
50     const struct in6_addr& getAddressAsIn6Addr() const;
51     const struct in_addr& getAddressAsInAddr() const;
52 
53     bool isIpv6() const;
54     bool isIpv4() const;
55 
56     int32_t getPrefixLength() const;
57 
58     void setAddress(const struct in6_addr& addr);
59     void setAddress(const struct in_addr& addr);
60 
61     void setPrefixLength(int32_t prefix);
62 
63     friend bool operator==(const IpPrefix& lhs, const IpPrefix& rhs);
64 
65     friend bool operator!=(const IpPrefix& lhs, const IpPrefix& rhs) {
66         return !(lhs == rhs);
67     }
68 
69 public:
70     // Overrides
71     status_t writeToParcel(Parcel* parcel) const override;
72     status_t readFromParcel(const Parcel* parcel) override;
73 
74 private:
75     union InternalUnion {
76         InternalUnion() = default;
InternalUnion(const struct in6_addr & addr)77         InternalUnion(const struct in6_addr &addr):mIn6Addr(addr) { };
InternalUnion(const struct in_addr & addr)78         InternalUnion(const struct in_addr &addr):mInAddr(addr) { };
79         struct in6_addr mIn6Addr;
80         struct in_addr mInAddr;
81     } mUnion;
82     int32_t mPrefixLength;
83     bool mIsIpv6;
84 };
85 
86 }  // namespace net
87 
88 }  // namespace android
89 
90 #else // __ANDROID_VNDK__
91 #error "This header is not visible to vendors"
92 #endif // __ANDROID_VNDK__
93 
94 #endif  // ANDROID_IP_PREFIX_H
95