1 /*
2  * Copyright (C) 2008 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 #ifndef _NETLINKEVENT_H
17 #define _NETLINKEVENT_H
18 
19 #include <sysutils/NetlinkListener.h>
20 
21 #define NL_PARAMS_MAX 32
22 
23 class NetlinkEvent {
24 public:
25     enum class Action {
26         kUnknown = 0,
27         kAdd = 1,
28         kRemove = 2,
29         kChange = 3,
30         kLinkUp = 4,
31         kLinkDown = 5,
32         kAddressUpdated = 6,
33         kAddressRemoved = 7,
34         kRdnss = 8,
35         kRouteUpdated = 9,
36         kRouteRemoved = 10,
37     };
38 
39 private:
40     int  mSeq;
41     char *mPath;
42     Action mAction;
43     char *mSubsystem;
44     char *mParams[NL_PARAMS_MAX];
45 
46 public:
47     NetlinkEvent();
48     virtual ~NetlinkEvent();
49 
50     bool decode(char *buffer, int size, int format = NetlinkListener::NETLINK_FORMAT_ASCII);
51     const char *findParam(const char *paramName);
52 
getSubsystem()53     const char *getSubsystem() { return mSubsystem; }
getAction()54     Action getAction() { return mAction; }
55 
56     void dump();
57 
58  protected:
59     bool parseBinaryNetlinkMessage(char *buffer, int size);
60     bool parseAsciiNetlinkMessage(char *buffer, int size);
61     bool parseIfInfoMessage(const struct nlmsghdr *nh);
62     bool parseIfAddrMessage(const struct nlmsghdr *nh);
63     bool parseUlogPacketMessage(const struct nlmsghdr *nh);
64     bool parseNfPacketMessage(struct nlmsghdr *nh);
65     bool parseRtMessage(const struct nlmsghdr *nh);
66     bool parseNdUserOptMessage(const struct nlmsghdr *nh);
67 };
68 
69 #endif
70